JP7527258B2 - Multiple types of cylindrical vibration isolation devices with brackets - Google Patents

Description

The present invention relates to multiple types of cylindrical vibration isolation devices with brackets that are used, for example, in engine mounts and motor mounts in automobiles.

Conventionally, cylindrical vibration isolation devices with brackets, in which a cylindrical rubber mount body is attached to a mounting hole in a bracket, have been known as vibration isolation devices that are applied to, for example, engine mounts and motor mounts in automobiles.

A wide variety of bracket-equipped cylindrical vibration-damping devices are available for use depending on various conditions, such as required performance and mounting conditions. For example, different types of bracket-equipped cylindrical vibration-damping devices are used in different car models, and even within a single car, different types of bracket-equipped cylindrical vibration-damping devices are used as engine mounts, as shown in JP-A-5-301526 (Patent Document 1).

Japanese Patent Application Publication No. 5-301526

However, conventional cylindrical vibration isolation devices with brackets were designed separately for each installation location and vehicle type, and there was no concept of standardizing parts. In fact, brackets often vary greatly in shape and size depending on the installation location of the vibration isolation device and the vehicle type, and the rubber mount body also often varies in shape and size depending on the required characteristics. For this reason, there was no concept of standardizing materials and parts, and each part to be installed there was designed separately to fit each different rubber mount body and bracket.

For example, even in the case of stopper members that constitute a stopper mechanism that limits the amount of relative displacement of the power unit with respect to the vehicle body, it is necessary to take into consideration the shape and size of the rubber mount body to which it is attached, or the shape and size of the bracket with which it abuts, as well as the position, shape and size of the part of the stopper mechanism that serves as the abutting surface. Therefore, a shape and size that matches these factors is designed for each vibration isolation device.

On the other hand, in recent years, with environmental issues also in mind, there has been an ever-increasing demand for simplification of manufacturing and components. The inventor therefore conducted extensive research in the hope that standardization of components between different types of cylindrical vibration isolation devices with brackets would lead to improved environmental performance through simplification of manufacturing processes and components.

The present invention was made against the background of the above circumstances, and the problem to be solved by this invention is to propose a new technical idea that makes it possible to standardize parts for multiple types of cylindrical vibration isolation devices with brackets, while assuming differences in the rubber mount body and/or bracket, and without compromising functionality.

The following describes preferred embodiments for understanding the present invention. However, each embodiment described below is merely an example, and may be combined with one another as appropriate. The multiple components described in each embodiment may be recognized and used independently as far as possible, and may also be combined with any of the components described in another embodiment as appropriate. As a result, the present invention is not limited to the embodiments described below, and various alternative embodiments may be realized.

The first aspect is a cylindrical vibration-damping device with bracket, each of which has a cylindrical rubber mount body attached to a mounting hole of a bracket, and which is made into a plurality of types by making at least one of the bracket and the rubber mount body different from one another, and the same stopper member is attached as a common part to all of the plurality of types of cylindrical vibration-damping devices with bracket, and the stopper member is groove-shaped having a pair of side portions arranged on both axial sides of the mounting hole of the bracket and each extending from the inner peripheral portion to the outer peripheral portion of the mounting hole, and an outer portion arranged on the outer peripheral side of the bracket and connecting the pair of side portions to each other at the respective outer peripheral portions, and the stopper The pair of side portions of the member are provided with mounting holes for the inner axial member of the rubber mount body, and a protruding portion which extends in a different outer circumferential direction from the side portion and has the same thickness as the side portion is integrally formed around at least one of the mounting holes and protrudes circumferentially outward from the circumferential end edge of the side portion, so that in some types of the multiple types of bracket-equipped cylindrical vibration-damping devices, the side portions of the stopper member form an axial stopper mechanism, while in some other types of the multiple types of bracket-equipped cylindrical vibration-damping devices, the protruding portion of the stopper member forms an axial stopper mechanism.

As mentioned above, the stopper member must be designed to fit the shape of the rubber mount body or bracket to which it is attached, as well as the contact surface of the stopper mechanism, and there was no concept of standardizing parts in the first place. Under these circumstances, this embodiment assumes that there will be differences in the rubber mount body and brackets among multiple types of bracket-equipped cylindrical vibration isolation devices, but adopts a specific shape for the stopper member that is grooved and has a protruding portion on at least one of a pair of side portions, and by making good use of these grooved portions and protruding portions, it has been possible to realize a stopper member that can be shared among multiple types of bracket-equipped cylindrical vibration isolation devices.

The second aspect is that in the multiple types of bracket-attached cylindrical vibration-isolating devices according to the first aspect, in at least one type of the multiple types of bracket-attached cylindrical vibration-isolating devices, the outer portion of the stopper member forms a stopper mechanism in the axial direction.

According to this aspect, the outer portion of the groove-shaped stopper member, which corresponds to the bottom, can be used to construct a stopper mechanism perpendicular to the axis. In addition, both the axial stopper mechanism and the axial stopper mechanism required for each cylindrical vibration-damping device can be constructed in the same stopper member. Therefore, the axial stopper mechanism and the axial stopper mechanism can be provided close to each other, which allows the cylindrical vibration-damping device to be made smaller.

The third aspect is a cylindrical vibration isolation device with brackets of multiple types according to the first or second aspect, in which the stopper member is provided with a positioning mechanism in the circumferential direction of the rubber mount body.

According to this aspect, it is possible to use the rubber mount body to position the stopper member relative to the bracket that is positioned on the rubber mount body, and to prevent significant misalignment between the stopper member and the bracket.

The fourth aspect is a cylindrical vibration isolator with brackets of multiple types according to any one of the first to third aspects, in which the inner shaft member is formed with a fitting protrusion that protrudes from the outer circumferential surface at the axial middle portion, and the stopper member is formed with an external fitting protrusion that protrudes axially inward and is externally fitted onto the fitting protrusion.

According to this aspect, by externally fitting the external fitting protrusion of the stopper member onto the fitting protrusion of the inner shaft member, it is possible to hold and position the stopper member relative to the rubber mount body, for example. In addition, the fitting protrusion and the external fitting protrusion can form the circumferential positioning mechanism in the third aspect.

The fifth aspect is a cylindrical vibration isolator with brackets of multiple types according to any one of the first to fourth aspects, in which the pair of side parts and the outer part of the stopper member have a substantially constant dimension in the groove length direction in a groove-shaped area that connects the outer parts to the outer periphery of each side part.

This aspect is advantageous in that, for example, the shape of the stopper member can be simplified to improve shape stability and prevent a decrease in durability.

The sixth aspect is a cylindrical vibration isolation device with brackets of multiple types according to any one of the first to fifth aspects, in which the protruding portion of the stopper member has an outer peripheral edge shape that is curved in the circumferential direction and convex outward.

According to this aspect, it is easy to distribute stress when the stopper abuts while ensuring a sufficient contact area between the protruding portion of the stopper member and the bracket. It is also possible to improve the shape stability of the molded product.

The seventh aspect is a cylindrical vibration-isolating device with multiple types of brackets according to any one of the first to sixth aspects, in which the brackets are different from one another in the multiple types of bracket-attached cylindrical vibration-isolating devices, and in each of the different brackets, the axial dimensions of the peripheral wall portion of the mounting hole are set equal to one another at the location where the pair of side portions of the stopper member are arranged in the peripheral wall portion of the mounting hole.

This aspect allows the same stopper member to be attached to all of the different brackets, while ensuring freedom in designing the shape of each bracket.

The eighth aspect is a cylindrical vibration isolator with bracket of multiple types according to any one of the first to seventh aspects, in which the stopper member, at least in the portion constituting the stopper mechanism, is configured to include rubber that is interposed between the striking surface of the bracket and the mating member to which the inner shaft member is attached, and can cushion the impact of the strike.

According to this aspect, the bracket and the mating member to which the inner shaft member is attached strike each other via the rubber (buffer rubber) in the stopper member, limiting the amount of deformation in the rubber mount body and cushioning the impact.

The present invention makes it possible to construct multiple types of bracket-equipped cylindrical vibration isolation devices more efficiently than conventional structures and provide them to the market.

FIG. 1 is a perspective view showing a first bracket-attached cylindrical vibration-damping device, which is one of a plurality of types of bracket-attached cylindrical vibration-damping devices according to an embodiment of the present invention; FIG. 2 is a bottom view of the first bracket-equipped cylindrical vibration isolator shown in FIG. FIG. 2 is an exploded perspective view of the first bracket-attached cylindrical vibration isolator shown in FIG. 1 ; FIG. 3 is an enlarged longitudinal sectional view showing a cross section taken along line IV-IV in FIG. 2. FIG. 2 is an enlarged plan view showing a rubber mount body constituting the first bracket-attached cylindrical vibration isolator shown in FIG. FIG. 2 is an enlarged perspective view showing a stopper member constituting the first bracket-attached cylindrical vibration isolator shown in FIG. FIG. 7 is a right side view of the stopper member shown in FIG. FIG. 1 is a perspective view showing a second bracket-attached cylindrical vibration-damping device, which is another one of the multiple types of bracket-attached cylindrical vibration-damping devices according to an embodiment of the present invention; FIG. 9 is a bottom view of the second bracket-equipped cylindrical vibration isolation device shown in FIG. FIG. 10 is an enlarged longitudinal sectional view showing a cross section taken along the line XX in FIG. FIG. 11 is a perspective view showing a third bracket-attached cylindrical vibration-damping device, which is yet another one of the multiple types of bracket-attached cylindrical vibration-damping devices according to an embodiment of the present invention; FIG. 12 is a right side view of the third bracket-attached cylindrical vibration isolator shown in FIG. FIG. 13 is an enlarged longitudinal sectional view showing a section XIII-XIII in FIG. 12.

The following describes an embodiment of the present invention with reference to the drawings.

Figures 1 to 4 show a first bracket-equipped motor mount 10 for electric vehicles as a first bracket-equipped cylindrical vibration isolation device, which is one of several types of bracket-equipped cylindrical vibration isolation devices as an embodiment of the present invention. The first bracket-equipped motor mount 10 has a structure in which a cylindrical rubber mount body 16 is attached to an attachment hole 14 in a first bracket 12. Note that the orientation of the first bracket-equipped motor mount 10 when mounted on a vehicle is not limited, but in the following description, the up-down direction refers to the up-down direction in Figure 2, the front-rear direction refers to the right-left direction in Figure 2, and the left-right direction refers to the direction perpendicular to the plane of the paper in Figure 2, that is, the direction toward the front.

More specifically, as shown in FIG. 3, the first bracket 12 is a hard member made of metal or fiber-reinforced synthetic resin, which spreads in a direction perpendicular to the left-right direction as a whole. The first bracket 12 has a mounting hole 14 formed in the front part, which passes through the first bracket 12 and extends in the left-right direction. The mounting hole 14 is a circular through hole and has a certain length. That is, the peripheral wall portion 18 of the mounting hole 14 has a certain length in the axial direction (left-right direction) of the mounting hole 14, and the inner diameter of the peripheral wall portion 18 is approximately constant in the axial direction (left-right direction) of the mounting hole 14. In addition, the portion of the first bracket 12 other than the mounting hole 14 is structured to be suitable for mounting to a member on the power unit side, such as a motor, and is appropriately provided with lightening holes and insertion holes through which mounting bolts are inserted.

The rubber mount body 16 has a structure in which the inner shaft member 20 and the outer cylindrical member 22 are elastically connected by the main rubber elastic body 24.

The inner shaft member 20 is formed of a metal such as an aluminum alloy and has a rod shape as a whole. The inner shaft member 20 extends in the left-right direction, and both left-right end portions are fastening portions 26, 26 of a substantially rectangular block shape, and each fastening portion 26 has a bolt hole 28 penetrating in the up-down direction. On the other hand, the left-right middle portion of the inner shaft member 20 has a substantially elliptical cross section, and the outer peripheral surface of the left-right middle portion having the substantially elliptical cross section is located on the outer peripheral side of the fastening portion 26, which is the both left-right end portion. That is, the outer peripheral surface of the inner shaft member 20 has an axial middle portion that protrudes outward from both axial end portions, and the axial middle portion having the substantially elliptical cross section protrudes outward from both axial end portions to form a fitting protrusion 30 that fits with the outer fitting protrusion 70 described later. In particular, in this embodiment, the fitting protrusion 30 has a protrusion 32 that protrudes in the axial orthogonal direction (to the right in FIG. 4) and extends over substantially the entire length in the axial direction.

On the other hand, the fitting protrusion 30 in the axial middle portion of the inner shaft member 20 is provided with an inner recess 34 that opens to the side opposite the side where the protrusion 32 is provided (the left side in FIG. 4). The inner recess 34 has a certain opening dimension (the vertical dimension in FIG. 4) and depth dimension (the horizontal dimension in FIG. 4), and in this embodiment, the inner recess 34 is formed with an opening dimension that does not reach the entire length of the fitting protrusion 30.

The outer cylindrical member 22 is made of metal or the like and has a generally cylindrical shape extending in the left-right direction. The outer cylindrical member 22 has a generally constant inner diameter dimension through which the inner shaft member 20 can be inserted.

The fitting protrusion 30, which is the axially intermediate portion of the inner shaft member 20, is inserted into the outer tubular member 22, and the main rubber elastic body 24 is disposed radially between the fitting protrusion 30 of the inner shaft member 20 and the outer tubular member 22. As shown in FIG. 5, the main rubber elastic body 24 has a pair of rubber arms 36, 36 that connect the inner shaft member 20 and the outer tubular member 22 to each other. The rubber arms 36, 36 have their inner peripheral ends vulcanization-bonded to the fitting protrusion 30 of the inner shaft member 20, and their outer peripheral ends vulcanization-bonded to the inner peripheral surface of the outer tubular member 22. The main rubber elastic body 24 with the rubber arms 36, 36 covers the surface of the fitting protrusion 30 of the inner shaft member 20 in the left-right central portion; in other words, both left-right ends of the fitting protrusion 30 of the inner shaft member 20 are exposed from the main rubber elastic body 24 with the rubber arms 36, 36. In addition, the left-right ends of the fitting protrusion 30 of the inner shaft member 20 and the outer tube member 22 protrude outward in the left-right direction beyond the main rubber elastic body 24.

In the radial middle part of the main rubber elastic body 24, on the radial opposite side (left side in FIG. 4) to the side where the protrusion 32 of the fitting protrusion 30 is provided, a first recessed hole 38 is provided penetrating in the axial direction (left-right direction). The first recessed hole 38 extends for a length less than half the circumference in the circumferential direction. In addition, in the radial middle part of the main rubber elastic body 24, on the side where the protrusion 32 of the fitting protrusion 30 is provided (right side in FIG. 4), a second recessed hole 40 is provided penetrating in the axial direction (left-right direction). The second recessed hole 40 extends for a length less than half the circumference in the circumferential direction. A pair of rubber arms 36, 36 are arranged between the circumferential ends of the first recessed hole 38 and the second recessed hole 40.

The main rubber elastic body 24 has a first outer stopper rubber 42 that constitutes the wall portion on the opposite side to the inner shaft member 20 in the first recessed hole 38, and the first outer stopper rubber 42 is fixed to the inner peripheral surface of the outer cylindrical member 22. The first outer stopper rubber 42 has a first abutment protrusion 44 that protrudes toward the inner shaft member 20 at the circumferential center portion, and the first abutment protrusion 44 protrudes toward the opening of the inner recess 34 of the inner shaft member 20 at the circumferential center portion of the first recessed hole 38. The first abutment protrusion 44 is formed in a substantially rectangular block shape, and a first buffer protrusion 46 that further protrudes toward the inner shaft member 20 is provided at the left-right center portion of the protruding tip surface of the first abutment protrusion 44.

The main rubber elastic body 24 has a second outer stopper rubber 48 that constitutes the wall portion on the opposite side of the inner shaft member 20 in the second recessed hole 40, and the second outer stopper rubber 48 is fixed to the inner peripheral surface of the outer cylindrical member 22. The second outer stopper rubber 48 has a second abutment protrusion 50 that protrudes toward the inner shaft member 20 at the circumferential center portion of the second recessed hole 40, and the second abutment protrusion 50 protrudes toward the inner shaft member 20 at the circumferential center portion of the second recessed hole 40. The second abutment protrusion 50 has a substantially rectangular block shape, and a second buffer protrusion 52 that protrudes further toward the inner shaft member 20 is provided at the left-right center portion of the protruding tip surface of the second abutment protrusion 50.

A first inner stopper rubber 54 is fixed to the first recessed hole 38 side (left side in FIG. 4) of the fitting protrusion 30 of the inner shaft member 20. The first inner stopper rubber 54 is arranged in a filled state within the inner recess 34 and protrudes to the outer periphery side beyond the opening of the inner recess 34. The first inner stopper rubber 54 and the first outer stopper rubber 42 face each other at a distance in the left-right direction in FIG. 4. The first inner stopper rubber 54 is continuous with the circumferential ends of each rubber arm 36 and is provided integrally with the main rubber elastic body 24.

A second inner stopper rubber 56 is fixed to the second recessed hole 40 side (right side in FIG. 4) of the fitting protrusion 30 of the inner shaft member 20. The second inner stopper rubber 56 covers the surface of the protruding portion 32 of the fitting protrusion 30 and faces the second outer stopper rubber 48 at a distance in the left-right direction in FIG. 4. The second inner stopper rubber 56 is continuous with the circumferential end of each rubber arm 36 on the opposite side to the first inner stopper rubber 54, and is provided integrally with the main rubber elastic body 24.

In the rubber mount body 16 constructed as described above, when an impactful large amplitude vibration is input between the inner shaft member 20 and the outer cylindrical member 22 in the axis-perpendicular direction (left-right direction in FIG. 4), the amount of relative displacement between the inner shaft member 20 and the outer cylindrical member 22 in the axis-perpendicular direction is limited by the first axis-perpendicular stopper mechanism 58 and the second axis-perpendicular stopper mechanism 60.

That is, when the inner shaft member 20 is largely displaced to the left in FIG. 4 relative to the outer tubular member 22, the fitting protrusion 30 of the inner shaft member 20 and the outer tubular member 22 come into contact with each other via the first outer stopper rubber 42 and the first inner stopper rubber 54, which include the first abutment protrusion 44 and the first buffer protrusion 46. This forms a first axis-perpendicular stopper mechanism 58, which limits the amount of relative displacement in the axis-perpendicular direction between the inner shaft member 20 and the outer tubular member 22. Also, when the inner shaft member 20 is largely displaced to the right in FIG. 4 relative to the outer tubular member 22, the protrusion 32 of the fitting protrusion 30 of the inner shaft member 20 comes into contact with the outer tubular member 22 via the second outer stopper rubber 48 and the second inner stopper rubber 56, which include the second abutment protrusion 50 and the second buffer protrusion 52. This forms a second axis-perpendicular stopper mechanism 60, which limits the amount of relative displacement between the inner shaft member 20 and the outer cylindrical member 22 in the axis-perpendicular direction.

The first bracket-equipped motor mount 10 has a stopper member 62 that is attached to the first bracket 12 and the rubber mount body 16. As shown in FIG. 6, the stopper member 62 is generally groove-shaped and has a pair of side portions 64, 64 arranged on both axial (left-right) sides of the mounting hole 14 of the first bracket 12, and an outer portion 66 arranged on the outer periphery of the first bracket 12 and connecting the pair of side portions 64, 64. It is preferable that at least the portions of the stopper member 62 that constitute the axial stopper mechanisms 82, 106 and the axis-perpendicular stopper mechanism (third axis-perpendicular stopper mechanism 104) described below are made of an elastic material such as rubber, but in this embodiment, the entire stopper member 62 is made of an elastic material such as rubber.

In addition, in this stopper member 62, the pair of side portions 64, 64 and the outer portion 66 are each generally flat, and the pair of side portions 64, 64 face each other at a distance in the left-right direction, with the outer portion 66 extending parallel to the left-right direction. In particular, in the groove-shaped region formed by the pair of side portions 64, 64 and the outer portion 66 connected to the outer periphery of the side portions 64, 64, the pair of side portions 64, 64 and the outer portion 66 each have approximately constant dimensions in the groove length direction (the up-down direction in FIG. 6).

7, the stopper member 62 has a pair of side portions 64, 64 each having a generally rectangular shape, and the end portion of each side portion 64 opposite to the side connected to the outer portion 66 is provided with a mounting hole 68 for mounting to the inner shaft member 20 of the rubber mount body 16. The outer shape of the mounting hole 68 in the left-right view corresponds to the outer shape of the fitting protrusion 30 of the inner shaft member 20 in the left-right view, and has an elliptical portion 69a having a generally generally elliptical shape, and a protruding portion 69b that corresponds to the protrusion 32 and protrudes in a mountain shape at a part of the outer peripheral edge of the elliptical portion 69a. In the pair of side portions 64, 64, the inner peripheral edge of each mounting hole 68 is integrally provided with a generally annular outer fitting protrusion 70 that protrudes inward in the opposing direction continuously around the entire circumference. In addition, in the pair of side portions 64, 64, an uneven portion 72 is provided between the mounting hole 68 and the outer portion 66. By providing the uneven portion 72, the cushioning function of the axial stopper mechanism 82, 106 described below is improved and the impact noise is reduced.

A protruding portion 76 that spreads out toward the outer periphery (upward in FIG. 7) is provided around the mounting hole 68 in the side portion 64 as a portion different from the side portion 64. The protruding portion 76 has a generally semicircular shape when viewed from the left and right and bulges upward in FIG. 7, and the outer peripheral edge shape of the protruding portion 76 is curved in the circumferential direction and convex outward. Note that in this embodiment, the protruding portion 76 is provided on both of the pair of side portions 64, 64, but it is sufficient that the protruding portion 76 is provided on at least one of the side portions 64.

The first bracket 12, rubber mount body 16, and stopper member 62 configured as described above are assembled to the first bracket 12 and rubber mount body 16 after the rubber mount body 16 is attached to the mounting hole 14 of the first bracket 12 so that the pair of side portions 64, 64 of the stopper member 62 are positioned on both axial sides of the mounting hole 14 and the outer portion 66 of the stopper member 62 is positioned on the outer periphery of the first bracket 12.

Specifically, the rubber mount body 16 is press-fitted into the mounting hole 14 of the first bracket 12. The method of press-fitting the rubber mount body 16 into the mounting hole 14 is not limited, and for example, a conventionally known press-fit jig is used for press-fitting. At that time, the first bracket 12 and the rubber mount body 16 are assembled in a predetermined orientation relative to each other. In the first bracket-equipped motor mount 10, the first bracket 12 is arranged in the orientation shown in FIG. 2, and the bolt holes 28 provided at both left and right ends of the inner shaft member 20 are assembled so as to face the up and down directions. The mechanism for positioning the first bracket 12 and the rubber mount body 16 in the circumferential direction is not limited, and for example, a conventionally known circumferential positioning mechanism is used.

Then, a pair of side portions 64, 64 of the stopper member 62 are attached from the outside in the left-right direction to the inner shaft member 20 protruding on both left-right sides of the rubber mount main body 16 assembled to the first bracket 12. That is, the fastening portions 26, 26 at both left-right ends of the inner shaft member 20 are inserted into the mounting holes 68, 68 in the pair of side portions 64, 64, and the external fitting protrusions 70 protruding inward in the opposing direction (axially inward of the inner shaft member 20) from the pair of side portions 64, 64 are externally fitted in a substantially tight contact state to the exposed portions at both left-right ends of the fitting protrusion 30 of the inner shaft member 20 that are not covered by the main rubber elastic body 24, thereby assembling the stopper member 62 to the first bracket 12 and the rubber mount main body 16. In this embodiment, the stopper member 62 is substantially entirely made of an elastic material such as rubber, so that the pair of opposing side portions 64, 64 can be pushed apart to increase the distance between them, making it possible to insert both left and right ends of the inner shaft member 20 into the mounting holes 68 in the side portions 64.

In this embodiment, the fitting protrusion 30 has a generally oval shape, and the mounting hole 68 through which the fitting protrusion 30 is inserted has an oval portion 69a shaped to correspond to the fitting protrusion 30. Therefore, when the external fitting protrusion 70 is externally fitted onto the fitting protrusion 30, the stopper member 62 is positioned in the circumferential direction relative to the rubber mount body 16 by the fitting protrusion 30 and the oval portion 69a, each of which is non-circular. Therefore, in this embodiment, the fitting protrusion 30 and the oval portion 69a in the mounting hole 68, each of which is non-circular, form a positioning mechanism 78 between the rubber mount body 16 and the stopper member 62 in the circumferential direction. In particular, in this embodiment, a protrusion 32 is provided on a portion of the outer circumferential surface of the fitting protrusion 30, and a protrusion portion 69b corresponding to the protrusion 32 is provided in the mounting hole 68. These also constitute a circumferential positioning mechanism 78 between the rubber mount body 16 and the stopper member 62, achieving a higher degree of circumferential positioning.

As described above, in the first bracket-equipped motor mount 10, the rubber mount body 16 is assembled to the first bracket 12 in a predetermined orientation by a circumferential positioning mechanism (not shown), and the stopper member 62 is assembled in a state where it is positioned circumferentially relative to the first bracket 12 via the rubber mount body 16. Therefore, the positioning mechanism that positions the first bracket 12 and the stopper member 62 in the circumferential direction is configured to include a positioning mechanism 78 that positions the rubber mount body 16 and the stopper member 62 in the circumferential direction.

The stopper member 62 is assembled in a circumferentially positioned state relative to the first bracket 12 and the rubber mount body 16 by the positioning mechanism 78, so that a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 is positioned between the side portions 64, 64 that face each other in the left-right direction, and the outer portion 66 of the stopper member 62 covers a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 from the outer periphery in a predetermined direction.

In the first bracket-equipped motor mount 10 thus constructed, for example, the first bracket 12 is attached to a power unit side member such as a motor (not shown), and the inner shaft member 20 is attached to a mating member 80 on the vehicle body side, indicated by a two-dot chain line in FIG. 4, by a bolt (not shown) inserted through a bolt hole 28 in the inner shaft member 20. In the first bracket-equipped motor mount 10, the mating member 80 fixed to the inner shaft member 20 extends to the left in FIG. 4 where the overhanging portion 76 expands in the side portion 64 of the stopper member 62. As a result, a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 faces the mating member 80 fixed to the inner shaft member 20 in the left-right direction, sandwiching the overhanging portion 76 in the stopper member 62 therebetween.

In the first motor mount with bracket 10 constructed as described above, when an impactful large amplitude vibration is input between the inner shaft member 20 and the outer cylindrical member 22 in the axial direction (the vertical direction in FIG. 4), the relative axial displacement between the inner shaft member 20 and the outer cylindrical member 22 is limited by the axial stopper mechanism 82.

That is, when the inner shaft member 20 is largely displaced in the up-down direction in FIG. 4 relative to the outer tubular member 22, the first bracket 12 and the mating member 80 fixed to the inner shaft member 20, which face each other in the left-right direction, come into contact with each other through the protruding portion 76 of the stopper member 62. This forms an axial stopper mechanism 82, which limits the relative axial displacement between the inner shaft member 20 and the outer tubular member 22. Therefore, in the first bracket-equipped motor mount 10, the axial stopper mechanism 82 is formed including the protruding portion 76 of the stopper member 62. In addition, in this embodiment, the entire stopper member 62, including the protruding portion 76 interposed between the striking surfaces of the first bracket 12 and the mating member 80, is made of an elastic material such as rubber, so that the impact caused by the striking between the first bracket 12 and the mating member 80 can be cushioned. In addition, the portion of the stopper member 62 that is interposed between the striking surfaces of the first bracket 12 and the mating member 80 and constitutes the axial stopper mechanism 82 may include not only the overhanging portion 76 but also the side portion 64 that is located closer to the mounting hole 68 than the overhanging portion 76.

8 to 10 show a second bracket-equipped motor mount 90 for an electric vehicle as a second bracket-equipped cylindrical vibration-proof device, which is another one of the multiple types of bracket-equipped cylindrical vibration-proof devices of this embodiment. The second bracket-equipped motor mount 90 is structured in such a way that a cylindrical rubber mount body 16 is attached to the mounting hole 14 in the second bracket 92, similar to the first bracket-equipped motor mount 10 described above. In this embodiment, the shape of the second bracket 92 is different from that of the first bracket 12, while the same rubber mount body 16 is used to be attached. In the second bracket-equipped motor mount 90, the structure other than the second bracket 92 is the same as that of the first bracket-equipped motor mount 10 described above, and detailed explanations are omitted by assigning the same reference numerals in the drawings as those in the first bracket-equipped motor mount 10. The orientation of the second bracket-equipped motor mount 90 when mounted on the vehicle is not limited, but in the following description, the up-down direction refers to the up-down direction in FIG. 9, the front-rear direction refers to the right-left direction in FIG. 9, and the left-right direction refers to the direction perpendicular to the plane of the paper in FIG. 9, that is, the direction toward the front.

That is, in the second bracket-equipped motor mount 90, the rubber mount body 16 is press-fitted into the mounting hole 14 in the second bracket 92, and the same stopper member 62 as that of the first bracket-equipped motor mount 10 is attached to the second bracket 92 and the rubber mount body 16 as a common part. As a result, the second bracket 92 and the rubber mount body 16 are attached in a predetermined orientation, and the second bracket 92 is attached so that the bolt holes 28 of the inner shaft member 20 face up and down relative to the second bracket 92 arranged in the orientation shown in FIG. 9. The stopper member 62 is attached in a state where it is positioned in the circumferential direction relative to the second bracket 92 and the rubber mount body 16 by the positioning mechanism 78, so that a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 is located between the side portions 64, 64 facing each other in the left-right direction, and the outer portion 66 of the stopper member 62 covers a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 from the outer periphery in a predetermined direction.

In the second bracket-equipped motor mount 90 thus constructed, for example, the second bracket 92 is attached to a member on the power unit side, such as a motor (not shown), and the inner shaft member 20 is attached to a mating member 94 on the vehicle body side, shown by a two-dot chain line in FIG. 10, by a bolt (not shown) inserted through the bolt hole 28 of the inner shaft member 20. In this embodiment, the mating member 94 fixed to the inner shaft member 20 extends to the left in FIG. 10 where the overhanging portion 76 expands at the side portion 64 of the stopper member 62. As a result, a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 faces the mating member 94 fixed to the inner shaft member 20 in the left-right direction, sandwiching the overhanging portion 76 of the stopper member 62 therebetween.

Even in the second motor mount with bracket 90 constructed as described above, when an impactful large amplitude vibration is input between the inner shaft member 20 and the outer cylindrical member 22 in the axis-perpendicular direction (left-right direction in FIG. 10), the amount of relative displacement between the inner shaft member 20 and the outer cylindrical member 22 in the axis-perpendicular direction is limited by the first axis-perpendicular stopper mechanism 58 and the second axis-perpendicular stopper mechanism 60. Also, when an impactful large amplitude vibration is input between the inner shaft member 20 and the outer cylindrical member 22 in the axial direction (up-down direction in FIG. 10), the amount of relative displacement between the inner shaft member 20 and the outer cylindrical member 22 in the axial direction is limited by the axial stopper mechanism 82.

10, the second bracket 92 and the mating member 94 fixed to the inner shaft member 20, which face each other in the left-right direction, come into contact with each other via the protruding portion 76 of the stopper member 62. This forms an axial stopper mechanism 82, limiting the amount of relative axial displacement between the inner shaft member 20 and the outer cylindrical member 22. Therefore, the second bracket-equipped motor mount 90 also forms an axial stopper mechanism 82, including the protruding portion 76 of the stopper member 62. Note that, in the second bracket-equipped motor mount 90, the portion of the stopper member 62 that is interposed between the striking surfaces of the second bracket 92 and the mating member 94 and forms the axial stopper mechanism 82 may include not only the protruding portion 76 but also the side portion 64 located on the mounting hole 68 side from the protruding portion 76.

Next, in Figures 11 to 13, a third bracket-equipped motor mount 100 for electric vehicles is shown as a third bracket-equipped cylindrical vibration-proof device, which is yet another one of the multiple types of bracket-equipped cylindrical vibration-proof devices of this embodiment. The third bracket-equipped motor mount 100 is structured in such a way that a cylindrical rubber mount body 16 is attached to the mounting hole 14 in the third bracket 102, similar to the first and second bracket-equipped motor mounts 10 and 90 described above. In this embodiment, the shape of the third bracket 102 is different from that of the first and second brackets 12 and 92, while the same rubber mount body 16 is used to be attached. In the third bracket-equipped motor mount 100, the structure other than the third bracket 102 is the same as that of the first bracket-equipped motor mount 10 described above, and detailed explanations are omitted by assigning the same reference numerals in the figures as those in the first bracket-equipped motor mount 10. The orientation of the third bracket-equipped motor mount 100 when mounted on a vehicle is not limited, but in the following description, the up-down direction refers to the up-down direction in FIG. 12, the front-rear direction refers to the right-left direction in FIG. 12, and the left-right direction refers to the direction perpendicular to the plane of the paper in FIG. 12, that is, the direction toward the front.

That is, in the third bracket-equipped motor mount 100, the rubber mount body 16 is press-fitted into the mounting hole 14 in the third bracket 102, and the same stopper member 62 as in the first bracket-equipped motor mount 10 is attached as a common part to the third bracket 102 and the rubber mount body 16. As a result, the third bracket 102 and the rubber mount body 16 are assembled to each other in a predetermined orientation, and are assembled to the second bracket 92, which is oriented as shown in FIG. 12, so that the bolt holes 28 of the inner shaft member 20 face up and down. The stopper member 62 is assembled in a state where it is positioned circumferentially relative to the third bracket 102 and the rubber mount body 16 by the positioning mechanism 78, so that a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 is positioned between the side portions 64, 64 that face each other in the left-right direction, and the outer portion 66 of the stopper member 62 covers a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 from the outer periphery at the front.

In the third bracket-equipped motor mount 100 thus constructed, for example, the third bracket 102 is attached to a power unit side member such as a motor (not shown), and the inner shaft member 20 is attached to a mating member 103 on the vehicle body side, indicated by a two-dot chain line in Figures 12 and 13, by a bolt (not shown) inserted through the bolt hole 28 of the inner shaft member 20. In the third bracket-equipped motor mount 100, as shown in Figure 12, the mating member 103 fixed to the inner shaft member 20 extends toward the front (to the right in Figure 12) where the outer part 66 is located, and also extends downward while contacting the outer part 66. As a result, a part of the circumference of the peripheral wall part 18 of the mounting hole 14 faces the mating member 103 fixed to the inner shaft member 20 in the left-right direction, sandwiching a part of the side part 64 of the stopper member 62 (the part colored gray in Figure 12). In addition, a portion of the circumference of the peripheral wall portion 18 of the mounting hole 14 faces the mating member 103 fixed to the inner shaft member 20 in the axially perpendicular direction (front-rear direction) across the outer portion 66 of the stopper member 62.

In the third motor mount with bracket 100 constructed as described above, when an impactive large amplitude vibration is input between the inner shaft member 20 and the outer cylindrical member 22 in the axis-perpendicular direction (left-right direction in FIG. 13), the amount of relative displacement between the inner shaft member 20 and the outer cylindrical member 22 in the axis-perpendicular direction is limited by the first axis-perpendicular stopper mechanism 58 and the second axis-perpendicular stopper mechanism 60. When an impactive large amplitude vibration is input between the inner shaft member 20 and the outer cylindrical member 22 in the front-rear direction (left-right direction in FIG. 12), which is another axis-perpendicular direction, the amount of relative displacement between the inner shaft member 20 and the outer cylindrical member 22 in the axis-perpendicular direction is limited by the third axis-perpendicular stopper mechanism 104. Furthermore, when an impactful large amplitude vibration is input between the inner shaft member 20 and the outer cylindrical member 22 in the axial direction (the vertical direction in FIG. 13), the amount of relative axial displacement between the inner shaft member 20 and the outer cylindrical member 22 is limited by the axial stopper mechanism 106.

12 relative to the outer tubular member 22, the third bracket 102 and the mating member 103 fixed to the inner tubular member 20, which face each other in the left-right direction, come into contact with each other via the outer portion 66 of the stopper member 62. This forms a third axis-perpendicular stopper mechanism 104, which limits the amount of relative displacement in the axial direction between the inner tubular member 20 and the outer tubular member 22. Therefore, in the third bracket-equipped motor mount 100, a third axis-perpendicular stopper mechanism 104 is formed, which includes the outer portion 66 of the stopper member 62 and is different from the first and second axis-perpendicular stopper mechanisms 58, 60.

13, the third bracket 102 and the mating member 103 fixed to the inner shaft member 20, which face each other in the left-right direction, come into contact with each other via the side portion 64 of the stopper member 62 (particularly the portion colored gray in FIG. 12). This forms an axial stopper mechanism 106, which limits the amount of relative axial displacement between the inner shaft member 20 and the outer cylindrical member 22. Therefore, in the third bracket-equipped motor mount 100, the axial stopper mechanism 106 is formed including the side portion 64 of the stopper member 62. In addition, in the third bracket-equipped motor mount 100, if the mating member 103 fixed to the inner shaft member 20 is arranged to span not only the side portion 64 but also the protruding portion 76 when viewed from the left and right, the portion of the stopper member 62 that is interposed between the striking surfaces of the third bracket 102 and the mating member 103 and forms the axial stopper mechanism 106 may include not only the side portion 64 but also the protruding portion 76.

As mentioned above, in the first to third motor mounts with brackets 10, 90, 100, the brackets (first to third brackets 12, 92, 102) have different shapes, but the axial (left-right dimensions) of the portion of the peripheral wall portion 18 of the mounting hole 14 located between the pair of side portions 64, 64 are made substantially equal. Specifically, the axial dimension of the peripheral wall portion 18 of the first bracket 12 shown by A in FIG. 4, the axial dimension of the peripheral wall portion 18 of the second bracket 92 shown by B in FIG. 10, and the axial dimension of the peripheral wall portion 18 of the third bracket 102 shown by C in FIG. 13 are all substantially equal.

According to the first to third motor mounts with brackets 10, 90, 100, which are multiple types of cylindrical vibration isolation devices with brackets of this embodiment, although the brackets (first to third brackets 12, 92, 102) are different for each, the same stopper member 62 is adopted as a common part, and the axial stopper mechanism 82, 106 in each motor mount with bracket 10, 90, 100 is configured using the stopper member 62. That is, the stopper member 62 is groove-shaped, and can be attached by sandwiching the pair of side portions 64, 64 against each bracket 12, 92, 102 so that they are positioned on both axial sides of the mounting hole 14. Therefore, the common stopper member 62 can be stably assembled regardless of the shape of the bracket. In addition, in this embodiment, in the first and second bracket-equipped motor mounts 10 and 90, the axial stopper mechanism 82 can be formed by the protruding portion 76 of the stopper member 62, and in the third bracket-equipped motor mount 100, the axial stopper mechanism 106 can be formed by the side portion 64 of the stopper member 62. Therefore, by making good use of the side portion 64 and the protruding portion 76 of the stopper member 62, the axial stopper mechanism required for each cylindrical vibration isolation device (e.g., a motor mount) can be formed.

In addition, in the third motor mount with bracket 100, the outer portion 66 of the stopper member 62 is used to provide a third axis-perpendicular stopper mechanism 104, which is one of the axis-perpendicular stopper mechanisms. This allows the same stopper member 62 to be used to configure both the axial stopper mechanisms 82, 106 and the axis-perpendicular stopper mechanism (third axis-perpendicular stopper mechanism 104), making it applicable to multiple types of motor mounts with brackets. In particular, since the same stopper member 62 can be used to configure the axial stopper mechanisms 82, 106 and the axis-perpendicular stopper mechanism (third axis-perpendicular stopper mechanism 104), it is possible to reduce the size of a cylindrical vibration isolation device with bracket (e.g., a motor mount with bracket).

The stopper member 62 and the rubber mount body 16 have a circumferential positioning mechanism 78, and each bracket 12, 92, 102 and the rubber mount body 16 are also positioned in the circumferential direction by a conventionally known positioning mechanism. This allows the side portion 64, outer portion 66, and overhang portion 76 of the stopper member 62 to be positioned in a predetermined position relative to each bracket 12, 92, 102.

The inner shaft member 20 has a fitting protrusion 30 that protrudes from the outer circumferential surface at the axially intermediate portion, and the stopper member 62 has an external fitting protrusion 70 that fits onto the fitting protrusion 30. That is, when the stopper member 62 is assembled to the rubber mount body 16, the external fitting protrusion 70 is fitted onto the fitting protrusion 30, thereby fixing the stopper member 62 to the rubber mount body 16. In particular, the fitting protrusion 30 and the external fitting protrusion 70 (and the elliptical portion 69a of the mounting hole 68 on the periphery thereof) are each elliptical in shape, and the fitting protrusion 30 and the mounting hole 68 have corresponding protrusions 32 and protrusions 69b, so that a positioning mechanism 78 can be formed between the stopper member 62 and the rubber mount body 16 in the circumferential direction.

In the stopper member 62, in the groove-shaped portion formed by the pair of side portions 64, 64 and the outer portion 66, the axial (left-right) dimensions of the pair of side portions 64, 64 and the outer portion 66 are approximately constant. This makes the shape of the stopper member 62 relatively simple, which is advantageous for improving shape stability and avoiding a decrease in durability. In this embodiment, since the pair of side portions 64, 64 and the outer portion 66 each have a certain dimension in the axial direction, the side portions 64 and the outer portion 66 can be used to easily provide an axial stopper mechanism and a stopper mechanism perpendicular to the axis.

A protruding portion 76 is provided on the side portion 64 of the stopper member 62, and the outer peripheral edge shape of the protruding portion 76 is curved in the circumferential direction and is outwardly convex. As a result, in the axial stopper mechanism 82 provided on the protruding portion 76, a contact area between the protruding portion 76 and the bracket (in this embodiment, the first bracket 12 or the second bracket 92) or the mating member 80, 94 is ensured, and stress is dispersed when the bracket and the mating member 80, 94 hit each other via the protruding portion 76. The shape stability of the molded product in the stopper member 62 is also improved.

In each bracket (first to third brackets 12, 92, 102), the axial dimensions (A, B, C, respectively) of the portion of the peripheral wall portion 18 of the mounting hole 14 where the stopper member 62 is mounted are made approximately equal to each other. This allows the same stopper member 62 to be mounted regardless of the overall shape of each bracket 12, 92, 102, improving the design freedom of the bracket shape.

In this embodiment, the entire stopper member 62 is made of an elastic material such as rubber, and the side portions 64, outer portions 66, and overhanging portions 76 of the stopper member 62, which constitute the stopper mechanism in the axial direction and the axial direction perpendicular to the direction, are also made of an elastic material. As a result, the impact when each bracket 12, 92, 102 hits the mating member 80, 94, 103 is buffered via the side portions 64, outer portions 66, and overhanging portions 76, and these side portions 64, outer portions 66, and overhanging portions 76 can function as cushioning rubber.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the specific descriptions.

In the above embodiment, the first to third bracket-equipped motor mounts 10, 90, 100 have different brackets (first to third brackets 12, 92, 102) and the same rubber mount body 16 is attached to each bracket 12, 92, 102. However, for example, different rubber mount bodies may be attached to brackets of the same shape to form multiple types of bracket-equipped cylindrical vibration-damping devices, or different rubber mount bodies may be attached to brackets of different shapes to form multiple types of bracket-equipped cylindrical vibration-damping devices. In the present invention, the same stopper member may be attached as a common part to multiple types of bracket-equipped cylindrical vibration-damping devices constructed in this manner.

In the above embodiment, when the stopper member 62 is placed in the orientation shown in FIG. 7, the protruding portion 76 protrudes upward, but the direction in which the protruding portion bulges out from the side portion is not limited. That is, in some cylindrical vibration-damping devices, it is sufficient that the protruding portion is provided in the extension direction of the mating member attached to the inner shaft member so that the protruding portion forms a stopper mechanism, and the protruding direction of the protruding portion can be set appropriately according to the expected mating member, etc. Furthermore, such a protruding portion may extend not only in one direction around the mounting hole but also in multiple directions.

The shape of the rubber mount body is not limited. For example, the shape of the main rubber elastic body can be set appropriately according to the required vibration-proofing characteristics, and an outer tubular member is not necessary. For example, the outer peripheral surface of the main rubber elastic body may be directly fixed to the inner peripheral surface of the mounting hole in the bracket. In other words, the method of mounting the rubber mount body to the mounting hole in the bracket is not limited to press-fitting. The shape of the inner shaft member is not limited, and may be, for example, a cylindrical shape or a polygonal column shape. Furthermore, the inner shaft member may be cylindrical or polygonal tubular, and may be fixed to the mating member by a mounting bolt inserted into the inner shaft member. The mating member to which the inner shaft member is fixed may be a member on the vehicle body side, or a member on the power unit side such as a motor.

A positioning mechanism for positioning the stopper member and the rubber mount body in the circumferential direction is not essential, and even if a circumferential positioning mechanism is provided, it is not limited to the form exemplified in the above embodiment, and any conventionally known circumferential positioning mechanism can be used.

In the above embodiment, the entire stopper member 62 was made of an elastic material such as rubber, but it is preferable that the portion of the stopper member that is interposed between the bracket and the mating member that hit each other is made of an elastic material such as rubber, and hard materials may be used for other portions.

In the above embodiment, a motor mount with a bracket for an electric vehicle is exemplified as a cylindrical vibration-damping device with a bracket, but the cylindrical vibration-damping device with a bracket according to the present invention may also be an engine mount or differential mount with a bracket for an automobile, a cylindrical vibration-damping device with a bracket for a non-automotive use, etc.

In the above embodiment, three types of bracket-attached cylindrical vibration-damping devices (first to third bracket-attached motor mounts 10, 90, 100) are shown as multiple types of bracket-attached cylindrical vibration-damping devices, but there may be two or four or more types of bracket-attached cylindrical vibration-damping devices. In addition, in some of these types, the side portions of the stopper member form the axial stopper mechanism, and in other types, the protruding portions of the stopper member form the axial stopper mechanism, but it is sufficient that at least one type of each cylindrical vibration-damping device is included.

10 First bracket-attached motor mount (multiple types of bracket-attached cylindrical vibration-isolating devices, first bracket-attached cylindrical vibration-isolating device)
12 First bracket 14 Mounting hole 16 Rubber mount main body 18 Peripheral wall portion 20 Inner shaft member 22 Outer tubular member 24 Main rubber elastic body 26 Fastening portion 28 Bolt hole 30 Fitting projection 32 Projecting portion 34 Inner recess 36 Rubber arm 38 First recessed hole 40 Second recessed hole 42 First outer stopper rubber 44 First abutting projection 46 First buffer projection 48 Second outer stopper rubber 50 Second abutting projection 52 Second buffer projection 54 First inner stopper rubber 56 Second inner stopper rubber 58 First axis-perpendicular stopper mechanism 60 Second axis-perpendicular stopper mechanism 62 Stopper member 64 Side portion 66 Outer portion 68 Mounting hole 69a Elliptical portion 69b Projecting portion 70 External fitting projection 72 Concave and convex portion 76 Projecting portion 78 (Circumferential) positioning mechanism 80; Counterpart member 82; (Axial) stopper mechanism 90; Second bracket-attached motor mount (multiple types of bracket-attached cylindrical vibration-isolating devices, second bracket-attached cylindrical vibration-isolating device)
92 Second bracket 94 Counterpart member 100 Motor mount with third bracket (multiple types of cylindrical vibration isolation devices with brackets, cylindrical vibration isolation device with third bracket)
102: third bracket; 103: mating member; 104: third axis-perpendicular stopper mechanism; 106: (axial) stopper mechanism

Claims (8)

A cylindrical vibration isolation device with bracket is provided in a plurality of types, each of which has a cylindrical rubber mount body attached to an attachment hole of a bracket, and at least one of the bracket and the rubber mount body is made different from one another,
The same stopper member is attached to each of the plurality of types of bracket-attached cylindrical vibration-isolating devices as a common part,
The stopper member is groove-shaped and has a pair of side portions disposed on both axial sides of the mounting hole of the bracket and extending from the inner peripheral portion to the outer peripheral portion of the mounting hole, and an outer portion disposed on the outer peripheral side of the bracket and connecting the pair of side portions to each other at the outer peripheral portions;
a pair of side portions of the stopper member are provided with mounting holes for mounting the rubber mount body to an inner shaft member, and a protruding portion that extends in a different outer circumferential direction from the side portions and has the same thickness as the side portions is integrally provided around at least one of the mounting holes and protrudes outward in the circumferential direction from a circumferential edge of the side portions,
In some types of the plurality of types of bracket-equipped cylindrical vibration isolators, the side portion of the stopper member constitutes an axial stopper mechanism,
In some other types of the plurality of types of cylindrical vibration-damping devices with brackets, the protruding portion of the stopper member constitutes an axial stopper mechanism. The multiple types of cylindrical vibration-isolating devices with brackets described in claim 1, in which in at least one type of the multiple types of cylindrical vibration-isolating devices with brackets, the outer portion of the stopper member forms a stopper mechanism in the direction perpendicular to the axis. The stopper member is provided with a positioning mechanism in the circumferential direction of the rubber mount body. A cylindrical vibration isolation device with bracket of multiple types described in claim 1 or 2. The inner shaft member is formed with a fitting protrusion that protrudes from the outer circumferential surface at the axial middle portion, and the stopper member is formed with an external fitting protrusion that protrudes axially inward and is fitted onto the fitting protrusion. A cylindrical vibration isolation device with multiple types of brackets as described in any one of claims 1 to 3. Multiple types of bracket-attached cylindrical vibration isolation devices described in any one of claims 1 to 4, in which the pair of side parts and the outer part of the stopper member have approximately constant dimensions in the groove length direction in a groove-shaped area that connects from the outer parts to the outer periphery of each side part. Multiple types of cylindrical vibration isolation devices with brackets according to any one of claims 1 to 5, in which the protruding portion of the stopper member has an outer peripheral edge shape that is curved in the circumferential direction and convex outward. In the plurality of types of cylindrical vibration isolators with brackets, the brackets are different from each other,
A cylindrical vibration-damping device with multiple types of brackets as described in any one of claims 1 to 6, wherein, for each of the different brackets, the axial dimensions of the peripheral wall portion of the mounting hole are set equal to each other at the location where the pair of side portions of the stopper member are arranged in the peripheral wall portion of the mounting hole. The stopper member is configured to include rubber, at least in the portion that constitutes the stopper mechanism, that is interposed between the striking surface of the bracket and the mating member to which the inner shaft member is attached, and that can cushion the impact of the striking. A cylindrical vibration isolation device with multiple types of brackets, as described in any one of claims 1 to 7.

Images