KR0173163B1 - Electric motor - Google Patents

Abstract

It relates to a motor having a stator core wound with a coil, wherein the coil end can be formed by attaching an insulation cover, and the stator iron core having a plurality of slots is formed so that the coil circumference is short and the machine can be assembled. And a coil wound in a slot of the stator core and a coil cover having an inner circumference and an outer circumference to cover the coil end of the coil, and having a cylindrical shape, and insulating the slot and the end surface of the stator core with an insulating material, The self-fusion wire was wound around the coil end, and the inner wall of the coil end was covered with a coil cover substantially the same as the coil end shape.

As a result, it is possible to obtain an effect that the use amount of the coil is low, the cost is reduced, the characteristics are good, and the mechanization of the insulating paper, the varnish treatment, the assembly and the like is possible.

Description

Electric motor

1 is an assembled perspective view of an electric motor showing one embodiment of the present invention.

2 is an assembled perspective view of an electric motor showing one embodiment of the present invention.

3 is a plan view of a stator iron core showing an embodiment of the present invention.

4 is a cross-sectional view of the stator iron core showing one embodiment of the present invention.

5 is a plan view of a stator core after molding an insulating material, showing an embodiment of the present invention.

6 is a cross-sectional view of the stator iron core after molding the insulating material, showing an embodiment of the present invention.

7 is an assembled plan view of the stator iron core after the insulation cover is mounted, showing an embodiment of the present invention.

8 is an assembled cross-sectional view of the stator core after the coil cover is mounted, showing an embodiment of the present invention.

9 is an assembled bottom view of the stator core after the coil cover is mounted, showing an embodiment of the present invention.

10 is a cross-sectional view of the assembly of the stator iron core showing the fixing of the wedge, showing an embodiment of the present invention.

Figure 11 shows an embodiment of the present invention, a is a plan view of the upper coil cover, b is a partial cross-sectional view showing an arrow I.

Figure 12 shows an embodiment of the present invention, a side view including a half cross-sectional view of the upper coil cover.

Figure 13 shows an embodiment of the present invention, a top view of the lower coil cover.

Figure 14 shows an embodiment of the present invention, a side view including a half cross-sectional view of the lower coil cover.

15 is an exploded perspective view showing a conventional vibrator.

* Explanation of symbols for main parts of the drawings

20: stator iron 21: Andulebu

22: engaging portion 22a: upper and lower end surface

23: slot 25: hole

28: cylindrical part 29: cutting part

30: coil cover 31: upper coil cover

36: open hole 39: engaging projection

40: lower coil cover 42: coil

43: coil end

The present invention relates to a motor having a stator core wound around a coil.

FIG. 15 is a diagram showing a conventional electric motor disclosed in, for example, Japanese Utility Model Publication No. 62-37407. In the drawing, reference numeral 1 denotes a stator core formed by laminating silicon steel sheets in multiple layers. It has many slots 2, the insulating paper 3 is inserted in each of these slots 2, and the coil 4 is accommodated through this insulating paper 3. As shown in FIG. (5) and (6) are a pair of insulating covers for covering the coil ends 4a and 4b of the coils 4 protruding to both sides of the stator gore 1, which are applied to an insulating material such as plastic. In which the inner cylinder portions 7, 8 and the outer cylinder portions 9, 10 are integrally connected by annular end plates 11, 12, respectively. It is formed, and the annular coil storage space 13 with a bottom is formed between both cylinder parts.

(9a) and (10a) are flat surface portions intermittently formed on the outer circumferential surfaces of the outer cylinder portions (9) and (10) of the insulation covers (5) and (6), and (15) is equivalent to the engaging portion. As an alignment protrusion, it intermittently protrudes integrally with the flat surface part 9a of the outer cylinder part 9 of the said insulating cover 5, and is provided. (16) is a plurality of frame-shaped connecting members corresponding to the engaging portion, corresponding to the respective engaging projections (15) to the flat surface portion (10a) of the outer cylinder portion 10 of the insulating cover (6) It extends integrally and is provided.

The conventional electric motor is configured as described above, and the coil ends 4a and 4b of the coil 4 are accommodated in the coil can nip space 13 of the insulating covers 5 and 6 so that both insulating covers 5 are provided. (6) is coated on both sides of the stator core (1), and the outer cylinder portions (9) and (10) are fitted to the outer circumferential surface of the stator core (1), and the inner cylinder portions (7) and (8) of the The tip is brought into contact with the end face of the stator core 1. Then, the frame-shaped connecting member 16 is fitted to the engaging projection 15 to connect both insulating covers 5 and 6 to each other. Subsequently, varnish processing such as immersing the whole in the varnish bath, for example, is performed while the coil ends 4a and 4b are covered with the insulating covers 5 and 6.

In the conventional electric motor configured as described above, there are problems as described below.

1. The length of coil circumference is longer and the amount of coil usage increases, which increases the manufacturing cost.

Since the insulating paper 3 is inserted into the slot 2 and the coil 4 is inserted through the insulating paper 3, the coil circumference of the insulating paper 3 portion must be lengthened, resulting in an increase in the material cost and the assembly cost.

2. The cost rises because the insulating paper 3 is used.

3. The characteristics are bad.

Due to the long coil circumference, the magnetic flux density becomes high, resulting in poor efficiency and deteriorating characteristics such as rotation and torque.

4. It is impossible to mechanize the assembly because it requires varnish treatment.

After the two insulating covers 5 and 6 are connected to each other, a varnish treatment is performed such as being immersed in a varnish bath, so that mechanical assembly is impossible.

The object of the present invention is to solve the above-mentioned problems. [1] Since the coil circumference length is short, the amount of coil usage is small and the cost can be reduced, [2] the insulating paper can be removed, and [3] characteristics It is desirable to provide an electric motor that enables the [4] varnish treatment to be abolished and [5] enables mechanization such as assembly.

The motor according to the present invention includes a stator core having a plurality of slots, a coil wound around the slot of the stator core, and a coil cover having a tubular shape having an inner circumference and an outer circumference to cover the coil end of the coil, The slot and the end surface of the stator iron core are insulated with an insulating material, and the self-fusion wire is wound around the slot, and the inner wall is coated with the coil end by a coil cover approximately equal to the coil end shape.

In addition, the upper and lower end faces of the stator core protrude from the side to be the engaging portions of the coil cover, and the engaging projections engaged with the engaging portions are provided in the coil cover.

In addition, the stator cores are laminated and formed, and holes are formed through the stator cores in the stacking direction.

Moreover, the cylindrical part is protruded and provided in the outer periphery of a stator core, and the cutting part is provided in this cylindrical part.

Moreover, the opening part which opposes a slot is provided in the inside of an insulation cover concave.

In the first aspect of the present invention, the coil cover is wound around a magnetic fusion wire that is a coil in a slot of a stator core in which a slot and an end surface are insulated by an insulating material, and the coil cover of the coil is formed inside the coil cover. The coil cover is mounted to the stator core while sandwiching the coil by pressing on it.

In the second aspect of the invention, the coil cover is attached to the stator core by engaging the engaging projection of the coil cover to the engaging portion protruding from the upper and lower end faces of the stator core.

In the third aspect of the invention, when the insulating material is formed into the stator core by the insulating material, the flow of the insulating material to the opposite side of the resin gate sphere for the insulating material flows into the hole, and the insulating material also flows to the opposite gate sphere side.

In the fourth aspect of the invention, a jig for pressing the coil end on the cylindrical portion is inserted in the cutting portion, and the coil cover can be mounted while pressing the coil end inward.

In the fifth aspect of the invention, a jig for pressing the coil end on the cylindrical portion is inserted in the open hole portion, and the coil cover can be mounted while pressing the coil end outward.

1 to 4 are diagrams showing one embodiment of the present invention, and 20 is an inner circumference 21 of an electric steel sheet wound in the shape of a hoop as a stator core by a high-speed automatic press (not shown). It is formed by laminating to a predetermined thickness by dividing, punching, and simultaneously kneading with a rotor described later. 22 is a locking part, which is formed by protruding the upper and lower end surfaces 22a of the stator cores 20 from the side to the outside during lamination, and the end portions of the coil covers to be described later engage with each other. In addition, this engaging portion is provided in two types of molds (not shown) in the high-speed automatic press by, for example, entering and exiting a punch in an unshown mold when iron core plates having a plate thickness of 0.35 mm or 0.5 mm are stacked. A shape is produced and automatically formed by lamination thickness or lamination management so that at least one sheet on the upper and lower end surfaces becomes a protrusion. 23 is a slot, and a plurality of slots are provided at equal intervals from the inner circumferential side 21 of the stator core 20 toward the outer circumferential direction, and the magnetic pole pieces 24 are provided between the slots.

25 is a hole, which is formed in the slot 23 of the stator core 20 in the outer circumferential direction with a plurality of lamination directions at equal intervals, and the holes are formed at the same time as the slot 23 when the stator core 20 is formed. do. Reference numeral 26 denotes an insulating portion provided by, for example, injection molding so as to cover the stator core 20, and is molded and fixed to the slot 23 and the upper and lower end surfaces 22a. (27) is a coil guard, and consists of a cylindrical portion 28 provided by chimney-shaped on the outer periphery of the stator core 20 integrally with the insulator 26 of the stator core 20, and at its tip several The cutting part 29 which consists of a location is provided. In addition, this coil guard prevents the coil from loosening after the coil described later is wound in the slot 23 of the stator core 20. The cutting section 29 is a space for pressing the coil toward the center of the stator core 20 by a coil pressing jig when the coil cover to be described later is mounted on the stator core 20.

(30) is a coil cover, (31) is an upper coil cover for a terminal block forming one side of the coil cover, and is injection molded by an insulating resin for a disk shape covering the upper end surface (22a) of the stator core (20). have. Reference numeral 32 is a block portion provided on the upper coil cover, and the tip is bent in an approximately L shape to fix the terminal described later, as shown in FIG. Reference numeral 33 is likewise provided on the upper coil cover 31, and is used for fixing a temperature fuse (not shown) and a jumper wire to be described later. 34 is provided as a 1st groove so that the inner periphery shaft of the upper coil cover 31 may be enclosed by the side wall A 35, and it is used for the wiring of the lead wire mentioned later.

36 is an open hole formed in the inner circumferential wall of the upper coil cover 31, and is provided in a number so as to face the slot 23 when mounted to the stator core 20 in the same width as the slot 23. This open hole is a space for pressing the coil out of the stator core 20 by a coil pressing jig when the upper coil cover 31 is mounted on the stator core 20. 34a is a second groove, which is formed in the concave portion of the upper part of the upper coil cover 31 with a wider width than the magnet wire is used for positioning of the coil.

37 is provided in the lower part of the inner circumference wall of the upper coil cover 31 as an end part, and is fixed to the stator core 20 by pressing the wedge mentioned later in a concave surface. 38 is a connection member which extends downward from the outer circumferential wall of the upper coil cover 31, and has the engaging protrusion 39 bent in the L shape at the front-end | tip, and is provided in several at equal intervals.

In addition, the inside of the upper coil cover 31 is formed in a U-shaped cross-sectional shape to shape the coil end described below. 40 is a lower coil cover forming the other side of the coil cover 30, which is injection molded with an insulating resin for a disk shape covering the lower end surface of the stator core 20. As shown in FIG. In addition, the lower coil cover has a U-shaped cross-section inside, similar to the upper coil cover 31.

Numeral 41 is a hole provided in the lower insulating cover 30 at equal intervals for checking the coil status.

In addition, the lower coil cover 40 has an open hole 36, a connecting member 38, and an end portion 37 similarly to the upper coil cover 31. 42 is a coil, for example made of a magnet wire coated with a self-adhesive material, the slot 23 and the end surface is wound around the slot 23 of the stator core 20 insulated by an insulating material, While the coil end of the coil is molded inside the coil cover 30, the coil cover 30 is pressed into the stator core 20 to sandwich the coil 42 while the coil cover 30 has the stator core 20. Is mounted on. Reference numeral 43 denotes a coil end, and 44 denotes a wedge inserted into the slot 23. The coil cover 30 is attached to the end 37 of each cover 31 and 40 when the coil cover 30 is mounted on the stator core 20. By pressing in the up and down direction. 45 is a rotor provided in the stator core 20, the rotation shaft 46 is fitted through the center. 47 is a bearing attached to this rotating shaft, for example, it consists of a ball bearing.

Reference numeral 48 denotes an outer frame, and 49 denotes a frame forming one side of the outer frame, and a rotary shaft hole (not shown) is provided in the center thereof, and a joining edge portion 50 is provided at the peripheral end thereof. 51 forms the other side of the said outer frame 48, the joining edge part 50 is provided in the circumferential end, and the cord hole 52 is drilled inward from this joining edge part 50. As shown in FIG. Reference numeral 53 is a lead wire for power, for example, made of a heat-resistant vinyl wire. Reference numeral 54 is an insulating tube for protecting the lead wire, and is made of a flexible insulating material, for example, polyethylene. Reference numeral 55 is a cord bush through which the insulating tube penetrates and is inserted into the cord hole 52, for example, made of resin. Reference numeral 56 denotes a jumper wire, which is connected between the terminals 57 fixed between the block portions 32 of the upper coil cover 31, for example, made of a single conductor wire. Reference numeral 58 denotes a lead wire formed by the winding start and the winding end of the coil 42.

In the electric motor configured as described above, the assembly is performed by punching the electric steel sheet wound in the shape of the hoop to the stator core 20 and the rotor 45 by a high-speed automatic press, laminating to a predetermined thickness, and then rolling. To fix it. Next, the stator core 20 is washed with a washing liquid to remove oil components, and heated with a heating medium at about 150 ° C. Then, the insulating portion 26 is integrally formed by the insulating material in the upper and lower end surfaces 22a and the slots 23 by an injection molding machine (not shown). After molding, the trimming of the part is applied and a rust inhibitor is applied to the inner circumference.

Next, the coil 42 is wound around a winding machine jig (not shown) by a winding machine (not shown) of a winding-up type, and the coil 42 is inserted into the slot 23 and the slot 23 is simultaneously inserted. Insert the wedge 44 in it. Thereafter, the intermediate molding of the coil end 43 is performed.

Next, the fixed vehicle core 20 having the coils 42 is mounted on an assembly pallet (not shown), the rescue line 58 of the coils 42 is temporarily fixed, and the upper coil cover 31 is fixed to the stator cores 20. ) Is fixed by engaging the engaging portion 22 with the engaging projection 39. Then, the terminal 57 is attached to the upper coil cover 31, the rescue line 58 is bonded and fixed to the terminal 57, and then the terminal of the rescue line 58 is cut and removed.

Next, the lower coil cover 40 is attached to the lower end surface of the stator core 20 by the same method as the upper coil cover 31. The electrical inspection is automatically executed by bringing the terminal 57 into contact with an electrical inspection contact (not shown). Next, the self-adhesive varnish adhered to the surface of the magnet wire is melted by heat generated by applying a predetermined voltage to a predetermined position of the terminal 57 and energizing the coil 42 to fix the coil 42. do.

Next, the stator core 20 on which the coil cover 30 is mounted is press-fitted into the frame 49, and the rotor 45 on which the bearing 47 is mounted is fitted to the stator core 20. After attaching the washer not shown to the rotating shaft 46 of the rotor 45, various inspections are performed. Next, a jumper wire 56 and a temperature fuse are mounted on the upper coil cover 31, and a lead wire including the power supply lead wire 53 is connected to the terminal 57. And each charging part is insulated by a putty (not shown).

Next, the frame 51 and the bracket 51 are assembled and fixed by attaching the bracket 51 to the stator core 20 and closing the joining edge portion 50 of the frame 49. Next, the lead tube 53 is passed through the insulating tube 54 and attached to the bracket 51 together with the cord bush 55.

By the above, the end face and the slot 23 of the stator core 20 are insulated, the self-fusion wire is wound, and the upper and lower coil covers 31 and 40 are mounted on the stator core 20, thereby providing a slot cell and a varnish. The processing and shaping process of the coil end 43 can be abolished, the reduction in the circumferential length of the coil 42 can be reduced, and the fixing of the coil 42 can be facilitated, so that the final assembly can be mechanized. . Next, the engaging portion 39 of the stator core 20 and the engaging protrusion 39 of the coil cover 30 facilitate the mounting of the coil cover 30 to the stator core 20, and at the same time, the coil The fixing structure of the cover 30 can be simplified. In addition, the hole 25 of the stator core 20 is more efficient than the flow of the insulating material toward the opposite gate side of the resin through the surface in the slot 23 of the stator core 20, thereby improving the flowability. have. In addition, it can be molded at a low pressure, and after molding, the surface is smooth and can be molded to a thin thickness.

Next, by providing the first groove 34 and the convex portion 32 in the upper coil cover 31, the lead wire 53 and the terminal 57 can be positioned, thereby facilitating mechanization. In addition, the provision of the second groove 34a facilitates positioning of the end of the magnet wire and facilitates mechanization. The wedge 44 can be fitted by the terminals 37 of the coil covers 31 and 40.

Since the present invention is configured as described above, the following effects can be obtained.

In the first invention, the coil end is pressed into the stator core while the coil end is molded inside the coil cover, whereby the coil can be fitted and molded, so that the assembly can be mechanized.

In the second aspect of the present invention, by engaging the engaging portion with the engaging projection, the stator magnet core can be attached to the coil cover, and the shape of the engaging projection can be simplified.

In the third aspect of the invention, the flow of the resin for the insulating material is improved by the holes, and molding to a uniform thin thickness to the stator core can be performed.

In the fourth aspect of the present invention, the coil cover can be mounted while pressing the coil in the outer circumference of the coil end, thereby preventing engagement with the coil cover of the outer circumference of the coil end.

In the fifth aspect of the invention, the coil cover can be mounted while pressing the coil in the inner circumference of the coil end, thereby preventing engagement of the coil end with the coil cover.

Claims (7)

A stator core having a plurality of slots and end faces insulated from each other by an insulating material, a coil in which a self-fusion wire is wound through the slot, and at least one tubular coil cover covering one of the end faces And an inner circumference wall and an outer circumference wall connected by a cylindrical bottom wall such that the inner structure of the coil cover is substantially the same as that of the coil end. The electric motor according to claim 1, wherein one of the end faces protrudes radially outward from the circumferential face of the stator core to provide a locking part engaged with the engaging protrusion formed on the coil cover. The motor according to claim 1 or 2, wherein the stator core is formed in a laminated structure, and holes are formed in the stator core in a stacking direction. The motor according to claim 1 or 2, wherein the cylindrical portion of the insulating material protrudes from an outer circumference of one of the end faces, and the cylindrical portion is provided with a cutting portion. The electric motor according to claim 1 or 2, wherein recessed opening portions are formed in the lower portion of the inner wall of the coil cover so as to face the slots. 3. The electric motor according to claim 1 or 2, wherein the material is formed in the end face and the slot of the stator core by injection molding. 3. The cylindrical tubular cover according to claim 1 or 2, wherein the two cylindrical coil covers respectively cover opposing end faces of the stator cores on which the coils are wound, and each end of the coil is provided between the end faces of the respective coils and the stator. An electric motor, characterized in that fitted to the.