JPH10127007A - Rotating machine - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide a highly reliable rotating machine that has good assemblability of a connection portion with the outside. A rotating machine includes a rotor, a casing for rotatably supporting the rotor, and a stator fixed inside the casing. On the other hand, the connection connector unit 10 has a connection terminal 9 integrally formed with the wiring of the stator coil of the stator 6 and has a locking claw that engages with the inner wall of the casing 7. ing. This connector unit 1 for connection
The engagement claw of No. 0 is engaged with the inner wall of the casing 7 to fix the connector unit 10 for connection to the casing 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating machine, and more particularly to a rotating machine suitable for application to a small rotating machine such as a brushless motor.

[0002]

2. Description of the Related Art In a conventional small rotating machine, for example, as described in Japanese Patent Application Laid-Open No. 8-51744, a lead wire is passed through a waterproof rubber boot in order to make an electrical connection with the outside. Things are used. Although not explicitly described in the publication, an external power supply connector is connected to the other end of the lead wire.

[0003]

However, in the method described in Japanese Patent Application Laid-Open No. 8-51744, the lead wire is easily detached from the rotating machine body by using a waterproof rubber boot, so that the electrical connection is difficult. Is unreliable.

A method of connecting a lead wire to a terminal of a rotating machine body by soldering or caulking is also conceivable.
In such a method, there is a problem that an assembling process is complicated and assemblability is poor.

An object of the present invention is to provide a highly reliable rotating machine which has good assemblability of a connection portion with the outside.

[0006]

To achieve the above object, the present invention provides a rotating machine having a rotor, a casing for rotatably supporting the rotor, and a stator fixed inside the casing. A connection terminal coupled to a wiring of a stator coil of the stator, and a connection connector unit having a locking claw engaged with an inner wall of the casing; The locking claw is engaged with the inner wall of the casing to fix the connector unit for connection to the casing. With such a configuration,
Since the connection connector unit can be attached with one touch, the assemblability is improved, and the engagement can be firmly locked by the engagement claws, so that the reliability at the time of attachment can be improved.

In the rotating machine, preferably, the connection connector unit includes a projection having a shape that fits into an annular groove provided on an outer surface of the casing, and the projection of the connection connector unit is connected to the casing. The above-mentioned annular grooves are fitted to each other, and with such a configuration, the waterproofness of the connecting portion of the connector unit for connection can be improved.

In the rotating machine, preferably, the stator includes a stator core, an insulating insulator formed on a surface of the stator core, and a stator winding wound on the insulating insulator.
The stator includes a connection fitting fixed in the insulating insulator, and the connection terminal of the connection connector unit is inserted into the connection fitting to be electrically connected.

In the rotating machine, preferably, a plurality of the connection fittings are provided, and an overcurrent cut switch is connected between the connection fittings not connected to the connection terminal.

In the above rotating machine, preferably, the casing and the connector unit for connection are formed of the same resin molding material.
The sealing property can be maintained even with respect to thermal distortion.

In the rotating machine, preferably, the casing is constituted by a cup-shaped casing divided into two parts, one casing having a projection on an outer periphery thereof, and the other casing being provided with a projection of the casing. It is provided with a groove of a shape to be fitted to each other, the protrusion of the one casing is to be fitted to the groove of the other casing mutually, by such a configuration,
The waterproof property of the casing can be improved.

In the above rotating machine, preferably, the magnet forming the rotor is formed of a polar anisotropic magnet.
The cogging torque can be reduced.

In the above rotating machine, preferably, the magnet forming the rotor has a ring-like shape, and the shaft and the magnet forming the center rotation axis of the rotor have substantially cross-sectional shapes. It is made to be integrally molded by an elastic member having an H-shaped rib,
With this configuration, the weight of the rotor can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary machine according to an embodiment of the present invention will be described below with reference to FIGS. First, an overall configuration of a rotating machine according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a partial sectional view of a rotating machine according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a rear view of FIG.

In FIG. 1, a rotor 1 serving as a rotating body is
The magnet 2, the shaft 3, and the elastic member 4 are integrally formed. The magnet 2 is a ring-shaped polar anisotropic magnet. The center axis of the ring of the magnet 2 is concentric with the shaft 3. The magnet 2 and the shaft 3 are integrally formed by an elastic member 4 such as resin or rubber having low rigidity and are connected. This molding method will be described later with reference to FIGS.

The shaft 3 has a length slightly shorter than the axial thickness of the magnet 2 in order to prevent the elastic body 4 from being loosened due to a change in the rotational force and internal temperature of the rotor 1 or an impact in the rotor axial direction. , Irregularities 3a on the outer surface of the shaft
Are formed. The uneven portion 3a is formed by, for example, iris knurl. Shaft 3 and elastic member 4
When integrally molded, the elastic member 4 penetrates into the concave and convex portions 3a to give an appropriate coupling strength between the shaft 3 and the elastic member 4.

The magnet 2 has a recess 2a and a chamfered portion 2b in order to increase the coupling strength between the magnet 2 and the elastic member 4. A plurality of depressions 2 a are provided on the end face of the magnet 2. Also, the chamfer 2b
Are provided on the inner circumferential surface of the magnet 2 at positions located on both end surfaces in the axial direction. The depression 2a works effectively as a detent for the magnet 2, and the chamfer 2b
At the same time, the elastic member 4 is generally formed by heat injection molding, so that the elastic member 4 is cooled and hardened after molding, and elasticity of the member used at the joint surface with the gnet 2 is obtained. A force for compressing and fixing by force acts. The recess 2a and the chamfered portion 2b provide an appropriate coupling strength between the magnet 2 and the elastic member 4. The compressive fixing force of the elastic member is the same for the joint surface with the shaft 3.

Further, the elastic member 4 has a space 4a formed between the inner peripheral surface of the ring-shaped magnet 2 and the outer peripheral surface of the shaft 3 without completely filling the elastic member 4. Therefore, the cross-sectional shape of the elastic member 4 is constituted by the rib 4b having a substantially H shape. Thus, the elastic member 4
By forming the cross-sectional shape by the substantially H-shaped rib 4b, a sufficient effect of the elastic force of the elastic member 4 can be obtained.

The rib 4b is connected by a surface between the outer peripheral surface of the shaft 3 and the inner peripheral surface of the magnet 2, and a portion of the magnet 2 protruding beyond the thickness of the magnet 2 is provided on the axial end surface side. It has a plurality of blade-shaped radiation ribs 4c connected to the joint surface. The shape of the radiation rib 4c will be described later with reference to FIG.

When the rotor 1 rotates, the blade-shaped radial ribs 4c not only maintain the strength of the rotor 1 itself, but also function to agitate the internal air and reduce the internal temperature. In addition, a small hole may be provided in the radiation rib 4c to positively promote the stirring action of the internal air.
The radiation rib 4c may have a curved shape so as to obtain a more fan effect.

Next, the rotor 1 is supported by bearings 5 whose inner rings are fixed to both ends of the shaft 3. The bearing 5 is housed in a bearing box 7 a provided at the center of both side walls of the cylindrical casing 7.

The cylindrical casing 7 is composed of left and right cup-shaped casings 7b and 7c which are divided into two parts by a substantially vertical center in the axial direction of the rotating machine. The stator 6 is fixed to the inner peripheral side of the cup-shaped casing 7b. The stator 6 is provided on the outer periphery of the magnet 2 of the rotor 1.
They are arranged concentrically.

The cylindrical casing 7 has a specific gravity of 0.8 to 3
It is formed of a lightweight member such as a resin which is a non-magnetic material described below. A plurality of mounting feet 7d for mounting the rotating machine are integrally formed on one of the two divided casings 7b. The anti-vibration rubber 16 is attached to the attachment foot 7d.
A boss 7e is formed integrally with the casing 7b. At the boss 7e, the other casing 7c and the screw 8 are assembled. The shapes of the mounting foot 7d and the boss 7e will be described later with reference to FIG.

On the split surface of the casing 7, the casing 7
b is provided with a groove 7f, and a casing 7c is provided with a protrusion 7g.
Is provided. The groove 7f and the protrusion 7g are shaped to fit each other, so that when the rotating machine body is fixed to a housing or the like with the mounting feet 7d, the stress generated on the divided surface is given to one of the casings 7b. At the same time as keeping the opening to a minimum, the structure is such that the strength of the split surface and the water-sealing property from the outside are improved by fitting the unevenness.

When the rotary machine is mounted, drainage holes 7h and 7i are provided on the lower surface side of each of the divided casings 7b and 7c of the cylindrical casing 7. Also, the divided casings 7b, 7b are opposed to the drain holes 7h, 7i.
In c, water stop walls 7j and 7k are provided. Water stop wall 7
j and 7k serve as a water stop wall for direct inundation of water from the lower surface side, and serve as a drain port for condensed water in the rotating machine or water entering from other parts. The vertical cross-sectional shape of the water blocking walls 7j and 7k is a dome shape, which will be described later with reference to FIG.

By providing the drain port as described above, water does not accumulate in the tubular casing 7 and the fan effect caused by the rotation of the rotor 1 causes the rotating casing to rotate through the drain port. Since air constantly flows in and out of the vehicle, electrical insulation can be maintained.

Further, the bearing box 7 of the casing 7c is provided.
On the outer surface of “a”, a tubular waterproof wall 7l including the shaft 3 is formed. Therefore, as described later, the infiltration of water into the bearing 5 from the outside is prevented by the labyrinth effect of the propeller fan for air blowing attached to the shaft 3 and the elastic vibration isolating rubber washer.

When the rotating machine is mounted, a connector unit 10 for external power supply connection, which is a separate component, is mounted on the side wall on the upper surface side of the casing 7b with one touch. The connector unit 10 includes a plurality of external power connection terminals 9.
Is fixed. The external power supply connection terminal 9 is electrically connected to the plurality of connection fittings 14 of the stator 6. The detailed structure of the connection fitting 14 will be described later with reference to FIG.

The casing 7b has an annular groove 7v, and the connector unit 10 has a projection 10a. The annular groove 7v and the projection 10a have a concave-convex shape that fits each other. The detailed structure of the connector unit 10 will be described later with reference to FIGS. Further, the connector unit 10 is attached with one-touch by engaging a locking claw provided on the connector unit 10 with an inner wall on the upper surface side of the casing 7b. The shape of the locking claw will also be described later with reference to FIG. 16J.

When a mating connector is connected to the external power supply connector unit 10, the connector insertion / removal force, the twisting force, and the like of the connector are determined by the connector unit 1.
0 occurs on the split surface of the casing 7b. However,
Similarly to the split surface of the casing 7, the connector unit 10 and the split surface of the casing 7b have a structure in which the unevenness is fitted to the split surface of the casing 7, thereby improving the split surface strength, water sealing ability from outside and dust resistance. I have. Moreover, since the external power supply connector unit 10 has a separate structure separated from the rotating machine main body, whether the terminal is to be taken out in the axial direction of the rotating machine or in the vertical direction. Can change the terminal take-out direction arbitrarily without changing the rotating machine main body, only by changing the type of the external power supply connector unit. In the example shown in FIG. 1, the external power supply connector unit 10 has a terminal withdrawing direction in the axial direction of the rotating machine.

Further, the material of the casing 7 is P
By using BT (polybutyl terephthalate) and also using the same PBT as the material of the external power supply connector unit 10, the casing 7 and the external power supply connector unit 10 have the same linear expansion coefficient. At the time of operation, the fitting portion is not softened due to the thermal strain caused by the repetition of cooling and heating at the ambient temperature, and the sealing performance is not deteriorated. The casing 7 and the external power supply connector unit 10 may not be made of the same material. At this time, the linear expansion coefficients of both materials are made substantially the same, so that the deterioration of the sealing property due to thermal strain can be prevented. You can do it.

The external power supply connector unit 10
In the present embodiment, the take-out position of the terminal is provided in the vicinity of a plurality of upper mounting feet 7d for mounting the rotating machine.
It shall be located at least higher than the axial horizontal plane.
This is because the connector unit 10 and the casing 7b
Of the external power supply connection terminal 9 integrally formed with the unit due to the infiltration of moisture from the divided surface of the unit or condensation of condensed water on the inner wall of the casing due to air cooling after the internal heat generation in the rotating machine body. This is to prevent leakage due to a decrease in surface insulation.

Further, the stator 6 includes a stator core 11
And the stator coil 12. The stator core 11 is formed of a plurality of punched and laminated iron plates. The stator coil 12 is wound around the stator core 11 and forms a rotating magnetic field with an interphase current whose commutation period is controlled by an external circuit. An end of the stator coil 12 is connected to a connection fitting 14.

Next, when the rotating machine is viewed from the front side in FIG. 2, the casing 7c has a tubular waterproof wall 7l including the shaft 3. Therefore, as described later, the infiltration of water into the bearing 5 from the outside is prevented by the labyrinth effect of the propeller fan for air blowing attached to the shaft 3 and the elastic vibration isolating rubber washer.

The casing 7c has eight reinforcing ribs 7p extending in the outer diameter direction from the cylindrical waterproof wall 7l. In addition, the casing 7c is assembled with the casing 7b located on the rear side by the casing fixing screws 8 at four locations on the outer peripheral portion. Casing 7b
Has four mounting feet 7d on its outer periphery. An anti-vibration rubber 16 having an anti-vibration effect when the rotating machine is mounted is mounted on the mounting foot 7d.

Next, in FIG. 3, when the rotating machine is viewed from the rear side, the casing 7b has eight reinforcing ribs 7p extending from the center thereof in the outer diameter direction. The casing 7b has four mounting feet 7d on its outer peripheral portion. An anti-vibration rubber 16 having an anti-vibration effect when the rotating machine is mounted is mounted on the mounting foot 7d. The casing 7b has bosses 7e at four locations on the outer periphery thereof, and is assembled with the casing 7c located on the rear side and the casing fixing screws 8.

At the corner of the rib reinforcing surface of the flange on the outer peripheral side of the resinous casing 7b, small holes 7n penetrating through the plurality of flanges are provided. The small hole 7n functions as an escape hole for water droplets accumulated in the flange. The position where the small hole 7n is provided is at least a position higher than the axial horizontal plane.

When the rotating machine is mounted, a connector unit 10 for connecting an external power supply, which is a separate component, is mounted on the side wall on the upper surface side of the casing 7b with one touch. The connector unit 10 includes a plurality of external power connection terminals 9.
Is fixed. In the illustrated example, three external power supply connection terminals 9 are arranged and fixed at equal intervals.

Next, the configuration of the drain hole of the rotating machine according to one embodiment of the present invention will be described with reference to FIG. FIG.
FIG. 2 is a cross-sectional view of a portion of a drainage hole of the rotating machine according to the embodiment of the present invention, which is a cross-sectional view taken along line II ′ of FIG. 1.

As shown in FIG. 4, a drainage hole 7h is provided on the lower surface side of the divided casing 7b. On the upper surface side of the drain hole 7h, a water stop wall 7j is provided opposite to the drain hole 7h. The water stop wall 7j has a U-shaped cross section. The water blocking wall 7j serves as a water blocking wall for direct inundation of water from the lower surface side, and serves as a drain port for condensed water in the rotating machine or water that has entered from other parts.

By providing the drainage port as described above, water does not accumulate in the cylindrical casing 7, and the rotation of the rotor 1 through the drainage port is performed by the fan effect of the rotation of the rotor 1. Since air constantly flows in and out of the vehicle, electrical insulation can be maintained.

Next, another configuration of the drain hole of the rotating machine according to the embodiment of the present invention will be described with reference to FIG.
FIG. 5 is a cross-sectional view of another configuration of a drain hole portion of the rotating machine according to the embodiment of the present invention, and is a cross-sectional view taken along line II ′ of FIG.

As shown in FIG. 5, a drain hole 7h is provided on the lower surface side of the divided casing 7b. On the upper surface side of the drain hole 7h, a water stop wall 7j is provided opposite to the drain hole 7h. The shape of the water stop wall 7j is an arc-shaped cross section. The water blocking wall 7j serves as a water blocking wall for direct inundation of water from the lower surface side, and serves as a drain port for condensed water in the rotating machine or water that has entered from other parts.

Next, a method for electrically connecting the stator coil of the rotating machine and the metal fittings according to the embodiment of the present invention will be described with reference to FIG. FIG. 6 is a front view of the stator of the rotating machine according to one embodiment of the present invention.

The stator 6 includes a stator core 11, a stator coil 12, an insulating insulator 13, and a plurality of connection fittings 14. The stator core 11 is formed of a plurality of punched and laminated iron plates. The stator coil 12 is wound around the stator core 11 and forms a rotating magnetic field with an interphase current whose commutation period is controlled by an external circuit. An end of the stator coil 12 is connected to a connection fitting 14. The insulating insulator 13 serves as insulation for the stator coil 12 and a wiring guide for the stator coil 12. Connection metal fittings 14
Are provided on the outer edge of the insulating insulator 13. In the illustrated example, a connection metal fitting 14a on the power supply side,
It is composed of a metal fitting 14b on the neutral point side. An overcurrent cut switch 15 is arranged in the connection fitting 14b on the neutral point side.

As shown, the stator coil 12 is wound between the slots 6a. The example shown is three-phase one
This is an example of two slots. Each U of the stator coil 12,
The three-phase terminal wires of V and W are pressed and fixed to the insulating insulator 13 and slots of a plurality of connection metal fittings 14 provided on the outer edge of the insulating insulator 13.

At the time of press-fitting and fixing, the connection metal fitting 14 is inserted into the cavity 13 a in which the connection metal fitting 14 is housed through the cutout groove 13 provided at the outer edge of the insulating insulator 13 and near the connection metal fitting 14. By taking a path in which the coil insertion direction to the coil is always obliquely connected, the coil is prevented from being cut due to the tension at the time of press-fixing.

The insulation type of the stator coil 12 is selected to be lower than the ignition temperature of the surrounding insulator such as the insulating insulator 13 and the cylindrical casing 7 including the insulating insulator 13. This takes into account that the stator coil 12 is disconnected first and does not affect other flammable members at the time of abnormal heat generation of the coil serving as an ignition source. In this case, the temperature fuse for detecting abnormal heat generation is not provided. It becomes unnecessary. However, when satisfying various performance specifications in which the power supply voltage, the winding diameter of the stator coil 12, and the number of windings are different, the above condition may not be satisfied. In this case, it is necessary to add a bimetal having a function of an overcurrent cut switch, a temperature fuse, a current fuse, and the like to the rotating machine body. Therefore, in the present embodiment, the overcurrent cut switch 15 is provided.

The connection of the stator coil to the connection fitting 14b on the neutral point side is similarly performed. Connection fitting 14
Are all shared, and have three metal fittings of the same shape. When the terminal wires are connected to the connection metal fittings 14a on the power supply side, the three metal fittings are separated, and three terminal wires are connected to the separated metal fittings.

On the other hand, when the overcurrent cut switch 15 is not used in the connection fitting 14a on the neutral point side, 3
Using the same metal fittings, 3
Fixing the wires at once eliminates the need to connect the neutral points. However, when the overcurrent cut switch 15 is used as in the present embodiment, at least one of the three connection metal fittings is cut off, and the overcurrent cut switch 15 is inserted between the other two metal fittings. When the rotating machine is abnormal, the internal connection circuit is shut off beforehand.

Next, a method of forming a rotor of a rotating machine according to an embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a front view showing a shape of the rotor of the rotating machine according to one embodiment of the present invention immediately after molding, and FIG. 8 is a view showing a shape of the rotor of the rotating machine immediately after molding according to one embodiment of the present invention. It is a half sectional side view shown.

After the shaft 3 and the magnet 2 are set in the mold, the elastic member 4 is heated and extruded from the gate of the molding machine into the mold by a method such as release molding or compression molding. The passage portion 17 is a portion that remains when the material of the elastic member is extruded from the gate of the molding machine into the mold, and is formed on the end surface of the magnet 2 and the passage portion 17a formed on the outer peripheral portion of the magnet 2. It consists of a passage 17a. That is, in the present embodiment, since the elastic member 4 flows through the outer peripheral portion and both end surfaces of the magnet 2, the internal stress generated by the injection pressure on the inner and outer surfaces of the magnet 2 becomes substantially uniform, and the molding is performed. Occasionally, the internal stress does not cause damage to the magnet 2 such as a hair crack.

The elastic member 4 has a substantially H-shaped cross section between the inner peripheral surface of the ring-shaped magnet 2 and the outer peripheral surface of the shaft 3 without completely filling the elastic member 4. 4b. The rib 4 b is connected by a surface between the outer peripheral surface of the shaft 3 and the inner peripheral surface of the magnet 2, and a portion protruding from the thickness of the magnet 2 on the axial end surface side to the shaft joining surface. It has a plurality of blade-shaped radiation ribs 4c connected thereto.

Four blade-shaped radiation ribs 4c are provided. When the rotor 1 rotates, the radiation rib 4c not only maintains the strength of the rotor 1 itself, but also has an action of stirring the internal air to reduce the internal temperature.

Incidentally, in the example shown in FIG.
The elastic member filled in the magnet 2 is removed, but this is left, and at least a part or the entire outer peripheral surface of the magnet 2 is covered with the elastic member of the passage portion 17 so that it can be assembled and transported later. It can also be used to help protect the outer peripheral surface against accidental hits or drops.

Next, an assembly procedure of the rotating machine according to one embodiment of the present invention will be described with reference to FIGS. FIG. 9 is an assembly view of a rotating machine according to one embodiment of the present invention, and FIG. 10 is a front view of a casing on the opposite side to the output side of the rotating machine according to one embodiment of the present invention.

First, as shown in FIG. 10, a bearing box 7a is provided inside a casing 7b on the non-output side of the rotating machine.
, A projection 7g, a projection-like rib 7o, and a radially-spaced rib 7p. The internal structure of the casing 7c on the output side is the same as that of the casing 7b.

On the inner end surface of the outer periphery of the cup-shaped casing 7b, a plurality of projecting ribs 7o are provided, which are used to position the grooves 11a (FIG. 9) provided on the outer periphery of the stator core 11 in the rotation direction and serve as fitting guides. Have been.

The bearing box 7a of the casing 7b
The outer peripheral portion has at least 5
At least a plurality of radially-spaced ribs 7p are provided. The radially-spaced ribs 7p serve to secure the strength of the bearing box 7a when the bearing box 7a is cooled and press-fitted and fixed the bearing 5 and to keep the inner peripheral diameter d4 of the bearing box 7a in a perfect circle. have.

9 and 10, the stator core 1
1 and the outermost diameter d2 of the bearing 5,
Diameter d3 of the inner peripheral surface of the cylindrical outer periphery of the two-part casings 7b and 7c
And the inner peripheral diameter d4 of the bearing box 7a is approximately 70 obtained by adding a marginal temperature of about 20 ° C. to the upper limit value of the operating temperature of the rotating machine.
Above ゜ C, there is a gap fitting relationship of d3> d1, d4> d2, and conversely, below 70 ° C, d3 <d1, d4 <d2
The dimensions having an interference fit are obtained by using the coefficient of thermal expansion of the casing 7.

That is, at the time of assembly, the casing 7b is
The stator 6 can be easily assembled by warming it to 0 ° C. or more for a short time and inserting the groove 11 a of the stator core by using the protruding rib 7 n as a guide from the axial direction.

At this time, the connecting metal fitting 14 (FIG. 6) in the cavity 13a formed on the outer peripheral portion of the outer periphery of the insulating insulator 13 of the stator core 6 is opposed to the casing 7b facing the casing 7b.
An external power supply connection terminal 9 extending from the inner end face of the
Automatically connecting the rotating machine to the internal power supply and connecting it to an external power source is possible with a straight stack.

Thereafter, the rotor 2 is assembled into the stator 6, and the casing 7c is assembled to the stator 6 by the same hot insert method as described above.

The dividing surface of the casing 7b is provided with an annular groove 7f, and the dividing surface of the casing 7c is provided with an annular projection 7g. Since the groove 7f and the projection 7g are fitted to each other, the casings 7b and 7c can be easily assembled by fitting the unevenness.

Thereafter, the casing 7c is completely fixed to the boss 7e of the casing 7b by using a plurality of screws 8. Further, the connector unit 10 is
Can be attached with one touch. Also, the casing 7b
Finally, the vibration isolating rubber 16 is assembled to the plurality of mounting feet 7d to complete the assembly. When the assembly is completed, the members of the casing 7 are in a cooled state, so that the internal stator 6 and the bearing 5 of the rotor 1 can maintain the press-fit state even in the axially and radially always operating conditions.

Next, the rotation operation of the rotating machine according to one embodiment of the present invention, in particular, reduction in vibration and improvement in efficiency will be described with reference to FIGS. FIG. 11 is an output waveform diagram of a control circuit flowing through a stator coil of a rotating machine according to one embodiment of the present invention. FIG. 12 is a polar anisotropic magnet used for a rotor of the rotating machine according to one embodiment of the present invention. FIG. 13 is a magnetic flux orientation model diagram of a conventional radial anisotropic magnet, and FIG. 14 is a surface magnetic flux waveform diagram of a rotor of a rotating machine according to an embodiment of the present invention.

First, as shown in FIG. 11, the external control circuit outputs control signals to the U, V, and W phase windings of the three-phase stator coil 12 of the rotating machine according to the present embodiment. . The stator coil 12 generates a rotating magnetic field by these control signals, and is operated at an electrical angle of 120 °.

For example, when the control signal flowing through the U-phase winding is 6
It is assumed that it is turned on from 0 ° to 180 ° and from 240 ° to 360 °, and is energized at an electrical angle of 120 °, respectively. At this time, the control signal flowing through the V-phase winding is advanced by 60 ° with respect to the control signal flowing through the U-phase winding, and 0 ° to 12 °.
It turns on up to 0 ° and from 180 ° to 300 °. The control signal flowing through the W-phase winding is delayed by 60 ° with respect to the control signal flowing through the U-phase winding, and is turned on from 120 ° to 240 ° and from 300 ° to 420 °.

The magnet used in this embodiment is the ring-shaped magnet 2 as described with reference to FIG. The ring-shaped magnet 2 has polar anisotropy, and its magnetic flux orientation is as shown in FIG. That is, since the polar anisotropic magnet has a magnetic flux flow that forms a closed magnetic path by itself, there is no need to form a closed magnetic path using an inner stator core inside the magnet as in the related art.

The magnetic flux orientation of a conventional general radial anisotropic magnet is as shown in FIG.
That is, in the radial anisotropy, the magnetic flux flows toward the center. Therefore, in order to form a closed magnetic circuit,
It is necessary to use an inner stator core.

When a polar anisotropic magnet is used, the magnetic flux waveform on the rotor surface is as shown in FIG. That is, when the polar anisotropic magnet is used, the surface magnetic flux waveform becomes a smooth magnetic flux waveform between the sine wave poles due to the orientation characteristics shown in FIG. On the other hand, when a radial anisotropic magnet as shown in FIG. 13 is used, the surface magnetic flux waveform becomes a rectangular magnetic flux waveform.

Therefore, the magnitude of the coking torque due to the change in magnetic flux acting between the stator 6 and the rotor 1 based on the commutation period of 120 electrical degrees can be greatly reduced by using a polar anisotropic magnet. It will be.

Further, as the weight of the rotor increases, the vibration acceleration of the rotor caused by the coking torque also fluctuates with the inertia of the rotor. In the present embodiment, the polar anisotropic magnet 2 has a ring-shaped and moderate thickness, and furthermore, the space between the magnet 2 and the shaft 3 is integrally formed with the elastic member 4 as described above, and the necessary minimum As it is lightweight so as not to lose elasticity with strength,
The variation width of the vibration acceleration can be reduced.

Conventionally, when the magnet is fixed to the rotor by a fastening method such as bonding, not only the number of components increases, but also there is a problem that time is required for assembling man-hours. By employing the fastening method according to the embodiment, the number of parts and the number of assembly steps can be reduced.

Conventionally, in order to enhance the strength reliability of the joint, the structure becomes complicated, and as a result, the effect of reducing the vibration acceleration due to the orientation characteristics of the magnet cannot be sufficiently exhibited, and Although the operating temperature, the number of rotations, and the rotor size of the machine are limited, in the present embodiment, such use restrictions are eliminated. .

Furthermore, in the present embodiment, the only components forming the magnetic path are the polar anisotropic magnet 2 and the stator core 11, and there is no need for a magnetic member around the component, so that there is no leakage of magnetic flux. In this embodiment, since there is no inner core, hysteresis loss and eddy current loss are eliminated. As a result, in this embodiment, high efficiency can be achieved.

Further, according to the present embodiment, the efficiency is increased by about 5% when a comparison is made between the conventional case and the case where the outer diameter of the rotating machine is the same size and the same stator is used. .

The cylindrical casing 7 is a non-magnetic material, and can be arbitrarily selected from a lightweight member such as resin or aluminum having a specific gravity of 0.8 to 3 or less.
% Reduction in weight.

Next, the configuration of the connector unit of the first example used in the rotating machine according to one embodiment of the present invention will be described with reference to FIGS. FIG. 15 is a front perspective view of a connector unit of a first example used for the rotating machine according to one embodiment of the present invention, and FIG. FIG. 4 is a perspective view of the connector unit of Example 1 viewed from the back side.

Connector unit 1 shown in FIGS. 15 and 16
Reference numeral 0 denotes the direction in which the external power supply connector is taken out in the axial direction of the rotating machine, which is an enlarged view of the connector unit 10 shown in FIG.

In the connector unit 10, three external connection terminals 9 are arranged at equal intervals. The connector unit 10 is integrally formed. As the material of the connector unit 10, PBT, which is the same resin material as the casing 7b, is used, and both have the same linear expansion coefficient.

The connector unit 10 includes a casing 7b
A fitting projection 10a is formed on an outer surface to be fitted. Also, on both sides of the external connection terminal 9, 2
The locking claws 10b are formed, and the casing 7b
After insertion into the device, a locking force is applied in the insertion / removal direction.

The connector unit 10 has a cassette-shaped unit structure that can be easily fitted and locked by one-touch operation with a locking claw 10b with a projection 10a fitted from the axial direction as a guide.

Next, the configuration of a connector unit of a second example used in the rotating machine according to one embodiment of the present invention will be described with reference to FIGS. FIG. 17 is a front perspective view of a connector unit of a second example used in the rotating machine according to one embodiment of the present invention, and FIG. 18 is a perspective view of the second example used in the rotating machine according to one embodiment of the present invention. FIG. 4 is a perspective view of the connector unit of Example 1 viewed from the back side.

Connector unit 1 shown in FIGS. 17 and 18
0 indicates that the external power supply connector is taken out in a direction perpendicular to the axis of the rotating machine.

In the connector unit 10, three external connection terminals 9 are arranged at equal intervals. The connector unit 10 is integrally formed. As the material of the connector unit 10, PBT, which is the same resin material as the casing 7b, is used, and both have the same linear expansion coefficient.

FIG. 15 and FIG.
Similar to the connector unit shown in FIG. 1, a fitting projection 10a is formed on the outer surface to be fitted to the casing 7b. Further, two locking claws 10b are formed on both sides of the external connection terminal 9, and have a structure in which a locking force is applied in the insertion / removal direction after being inserted into the casing 7b.

The connector unit 10 has a cassette-shaped unit structure which can be easily fitted and locked by one-touch with a locking claw 10b with a projection 10a fitted from the axial direction as a guide.

The connector units shown in FIGS. 15 and 16 and the connector units shown in FIGS. 17 and 18 are fitted by using the projections 10a fitted from the axial direction as guides in the same manner as in the method of assembling the rotating machine main body. It is a cassette-shaped unit structure that can be easily assembled and locked with one click with the claw portion 10b. Therefore, a combination with a variety of external power supply connectors can be achieved only by replacing the external power supply connector unit without changing the structure of the rotating machine main body.

As described above, according to the present embodiment, the engagement claw 10b of the connection connector unit 10 is engaged with the inner wall of the casing 7, and the connection connector unit 1
Since the connector 0 is fixed to the casing 7 with one touch, the assemblability of the connector unit is improved, and the connector can be firmly connected by the locking claw 10b, so that its reliability is improved.

Further, by preparing the connector unit 10 for connection in which the terminal is taken out in the axial direction or in the direction perpendicular to the axis, a combination with various external connectors can be used without changing the structure of the rotating machine body. It is possible.

Further, since the projection 10a of the connector unit 10 is fitted to the annular groove 7v of the casing 7, the waterproofness of the connecting surface can be improved.

Further, the insulating insulator 13 of the stator
The connection terminals 9 of the connection connector unit 10 are inserted into the connection fittings 14 fixed therein, and are electrically connected to each other, so that the assemblability of the connector unit is improved.

Further, since the casing 7 and the connector unit 10 for connection are formed of the same resin molding material, the sealing performance is not deteriorated by thermal distortion.

The casing 7 is composed of cup-shaped casings 7b and 7c divided into two parts, and the projection 7f of one casing 7b is replaced with the groove 7d of the other casing 7c.
Since g is fitted to g, the waterproofness is improved.

The magnet 2 forming the rotor 1
Is a polar anisotropic magnet, so that cogging torque can be reduced.

The magnet 2 constituting the rotor 1
Has a ring-like shape, and the shaft 3 and the magnet 2, which form the rotation axis at the center of the rotor 1, have a cross section
Since the rotor is integrally formed by the elastic member 4 having the U-shaped rib, the weight of the rotor can be reduced.

Next, with reference to FIG. 19, a configuration in the case where the rotating machine according to one embodiment of the present invention is used as a drive source of an outdoor unit of a home air conditioner will be described. FIG.
9 is a cross-sectional view of an outdoor unit of a home air conditioner using a rotating machine according to one embodiment of the present invention.

As shown in FIG. 19, the brushless motor 18 which is the rotating machine according to the present embodiment shown in FIG. 1 is attached as a drive source of an outdoor unit 19 of a home air conditioner. The brushless motor 18 is connected to the outdoor unit 1
9 to the mounting stay on the front side of the U-shaped capacitor 21,
Using a plurality of motor mounting screws 20, the motor is fixed at the mounting foot 7d described with reference to FIG.

At the end of the shaft 3 of the brushless motor 18, a propeller fan 22 having a blowing function by rotation of the shaft 3 is attached. Propeller fan 2
2 is a cylindrical waterproof wall 7l that includes the shaft 3 on the outer surface of the bearing box of the cup-shaped casing 7c.
The boss 22a of the propeller fan 22 is inserted into the seat surface inserted into the shaft 3 in the order of the E-ring 23, the flat washer 24 and the small disk-shaped rubber washer 25 provided in the vicinity of. , Has been fixed.

As described with reference to FIGS. 11 to 14, the brushless motor 18, which is a rotating machine according to the present embodiment, has a simple structure and low vibration. Accordingly, the resonance sound generated at the rotation speed corresponding to the vibration characteristic value of the propeller fan 22 can be prevented by providing the small disk-shaped rubber washer 25 for absorbing vibration between the brushless motor 18 and the propeller fan 22. It is. The small disk-shaped rubber washer 25 for absorbing vibration
The propeller fan 22 is directly damped at the resonance rotational speed, and has a structure in which the propeller fan 22 is appropriately compressed and abutted against the fan boss 22a. As a result, the rotating machine can be used in a wide range without providing a limited range of the number of rotations.

The E ring 23 and the flat washer 24
The rubber washer 25 is provided to maintain the perpendicularity with respect to the shaft 3. However, if the fitting portion between the shaft 3 and the fan 22 takes a stepped shape and a sufficient seating surface can be secured, one or both of these parts can be secured. Both components can be made unnecessary.

Further, if a rubber washer 25 for absorbing vibration is added to the nut 26 side of the fan boss 22a, the effect of reducing vibration at resonance is further increased.

The outdoor unit 19 is entirely covered with a housing 27 having a plurality of slit-shaped windows made of resin or iron plate. However, since the outdoor unit 19 is often installed outdoors, it is exposed to dust, wind and rain. ing. In addition, the brushless motor 18 performs a heat discharging function of the condenser by the rotation of the propeller fan 22, so that the brushless motor 18 always receives scattering of water droplets such as condensed water from the condenser 21 during the rotation. As shown in FIG. 1, the casing 7 of the brushless motor 18 has an annular groove 7f and a projection
g, drainage holes 7h and 7i located on the lower surface side of the casing 7 for releasing the moisture inside, and the unit bounces back and forth.
Water stop walls 7j and 7k for directly preventing water intrusion are provided.

The cylindrical water blocking wall 7 including the shaft 3
1 is positioned so as to overlap with the annular rib 22b disposed inside the boss portion 22a of the propeller fan 22. This labyrinth effect prevents water and dust from entering the bearing 5 from the outside.

Furthermore, the mating surface between the external power supply connector unit 10 and the casing 7 is
In particular, if you want to improve the sealing performance,
A method of attaching a nameplate 28 on the film to the joint portion and completely sealing the gap between the joint portions is adopted. in this way,
When the brushless motor 18 is attached to the indoor unit 19, the identification of the motor type and the date of manufacture is described on the nameplate, so that it is possible to easily confirm the identification at the time of attachment.

Next, referring to FIG. 20, a description will be given of another example configuration in which the rotating machine according to one embodiment of the present invention is used as a drive source of an outdoor unit of a home air conditioner. FIG. 20 is an enlarged sectional view of a main part of another example of the outdoor unit of the home air conditioner using the rotating machine according to one embodiment of the present invention.

In this embodiment, an example is shown in which the propeller fan 22 shown in FIG. 19 without the annular rib 22b is used. Note that the same reference numerals as those in FIG. 19 indicate the same parts.

A cylindrical collar 25a larger than the shaft diameter is formed at the outer edge of the vibration-absorbing rubber washer 25, and the cylindrical collar 25a is formed near the shaft hole at the center of the outer surface of the casing 7 near the shaft hole. And an appropriate gap,
They are arranged in a superposed positional relationship. With such a configuration, it is possible to prevent water from traveling along the exposed outer surface of the shaft and entering the inside of the rotating machine, so that the waterproof and anti-vibration effects can be simultaneously obtained.

As described above, according to the present embodiment, when used as a rotating machine of an outdoor unit of a home air conditioner, it is possible to achieve excellent waterproofness.

[0111]

According to the present invention, it is possible to improve the assemblability of the electrical connection with the outside of the rotating machine and to improve the reliability.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a rotating machine according to an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a cross-sectional view of a drain hole portion of the rotating machine according to the embodiment of the present invention, which is a cross-sectional view taken along the line II ′ of FIG. 1;

FIG. 5 is a cross-sectional view of another configuration of a drain hole portion of the rotating machine according to the embodiment of the present invention, which is a cross-sectional view taken along line II ′ of FIG. 1;

FIG. 6 is a front view of a stator of the rotating machine according to the embodiment of the present invention.

FIG. 7 is a front view showing a shape of the rotor of the rotating machine according to one embodiment of the present invention immediately after molding.

FIG. 8 is a half sectional side view showing a shape of a rotor of a rotating machine according to an embodiment of the present invention immediately after molding.

FIG. 9 is an assembly view of a rotating machine according to an embodiment of the present invention.

FIG. 10 is a front view of a casing on the opposite side to the output side of the rotating machine according to the embodiment of the present invention.

FIG. 11 is an output waveform diagram of a control circuit flowing through a stator coil of the rotating machine according to one embodiment of the present invention.

FIG. 12 is a magnetic flux orientation model diagram of a polar anisotropic magnet used for a rotor of a rotating machine according to an embodiment of the present invention.

FIG. 13 is a diagram showing a magnetic flux orientation model of a conventional radial anisotropic magnet.

FIG. 14 is a surface magnetic flux waveform diagram of a rotor of a rotating machine according to an embodiment of the present invention.

FIG. 15 is a perspective view of the connector unit of the first example used for the rotating machine according to the embodiment of the present invention as viewed from the front side.

FIG. 16 is a perspective view of the connector unit of the first example used in the rotating machine according to the embodiment of the present invention, as viewed from the rear side.

FIG. 17 is a perspective view seen from the front side of a connector unit of a second example used for the rotating machine according to the embodiment of the present invention.

FIG. 18 is a perspective view of a second example of a connector unit used in the rotating machine according to the embodiment of the present invention, as viewed from the rear side.

FIG. 19 is a sectional view of an outdoor unit of a home air conditioner using a rotating machine according to an embodiment of the present invention.

FIG. 20 is an enlarged sectional view of a main part of another example of an outdoor unit of a home air conditioner using a rotating machine according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotor 2 ... Polar anisotropic magnet 3 ... Shaft 4 ... Elastic body 5 ... Bearing 6 ... Stator 7 ... Cylindrical casing 7a ... Bearing box 7b, 7c ... Two-piece casing 7d ... Mounting foot 7e ... Mounting boss 7f ... Annular groove 7g Projection 7h, 7i Drain hole 7j, 7k Water blocking wall 7l Cylindrical water blocking wall 7v Fitting groove 8 Casing fixing screw 9 External power connection terminal 10 External power connection Connector unit 11: Stator core 12: Stator coil 13: Insulator for insulation 14: Connection bracket 15: Overcurrent cut switch 16: Anti-vibration rubber 17: Passage 18: Brushless motor 19: Outdoor unit 20: Motor mounting screw 21 ... Condenser 22 ... Propeller fan 23 ... E ring 24 ... Flat washer 25 ... Rubber washer 26 for vibration absorption 26 ... Nut 27 ... outdoor unit enclosure

Claims (8)

[Claims] 1. A rotating machine having a rotor, a casing rotatably supporting the rotor, and a stator fixed inside the casing, wherein a connection terminal coupled to a wiring of a stator coil of the stator is provided. A connection connector unit integrally formed and having a locking claw that engages with an inner wall of the casing, wherein the locking claw of the connection connector unit is engaged with an inner wall of the casing, and the connection is performed. A rotating machine, wherein a connector unit is fixed to the casing. 2. The rotating machine according to claim 1, wherein the connection connector unit includes a protrusion having a shape that fits into an annular groove provided on an outer surface of the casing, and the protrusion of the connection connector unit. And the annular groove of the casing. 3. The rotating machine according to claim 1, wherein the stator includes a stator core, an insulating insulator formed on a surface of the stator core, and a stator winding wound on the insulating insulator. The rotating machine according to claim 1, wherein the stator includes a connection fitting fixed in the insulating insulator, and the connection terminal of the connection connector unit is inserted into the connection fitting and electrically connected. 4. The rotating machine according to claim 3, wherein a plurality of the connection fittings are provided, and an overcurrent cut switch is connected between the connection fittings not connected to the connection terminal. Rotating machine. 5. The rotating machine according to claim 1, wherein the casing and the connection connector unit are formed of the same resin molding material. 6. The rotating machine according to claim 1, wherein the casing is constituted by a cup-shaped casing divided into two parts, one of the casings has a projection on an outer periphery thereof, and the other casing has a casing. A rotating machine comprising: a groove having a shape that fits with a protrusion, wherein the protrusion of the one casing is fitted with the groove of the other casing. 7. The rotating machine according to claim 1, wherein the magnet forming the rotor is a polar anisotropic magnet. 8. The rotating machine according to claim 1, wherein the magnet constituting the rotor has a ring-like shape, and a shaft constituting a central rotation axis of the rotor and the magnet are formed in a cross section. A rotating machine formed integrally with an elastic member having a substantially H-shaped rib.