JP6949088B2 - Rotating machine - Google Patents

Description

The present application relates to a rotary electric machine.

Small size and high output are required for rotary electric machines and generators for automobiles with limited mounting space. In order to reduce the size and increase the output, a method of arranging a connection plate having a rectangular cross section in an annular shape and connecting to each winding is used as a method of distributing a large current to each winding.

As a method of fixing such a connection plate to a stator, Patent Document 1 adopts a method of forming a barb on the connection plate and fitting it to an insulator (corresponding to a bobbin). Further, in Patent Document 2, the connection plate is insert-molded and fixed.

Japanese Unexamined Patent Publication No. 2008-31276 Japanese Unexamined Patent Publication No. 2010-141953

However, in a rotary electric machine that generates high vibration such as for automobiles, the structure as in Patent Document 1 cannot withstand the vibration and the connection plate may fall off. Further, the insert mold as in Patent Document 2 has a problem that the manufacturing cost is high.

The present application has been made in view of the above, and an object of the present application is to provide a rotary electric machine which realizes a strong fixing in which the connection plate does not fall off even if there is a high vibration and the manufacturing cost is low. And.

The rotary electric machine disclosed in the present application includes a bobbin provided at the end of an iron core and having a container-shaped groove.
The current is distributed to the coil in which the conductor wire is wound around the bobbin and the plurality of coils arranged around the rotation axis, and the protruding portion is buried in the adhesive stored in the container-shaped groove. A fixed connection plate is provided, the connection plate has an annular shape, the protrusions are provided corresponding to a plurality of the coils, and the container-shaped groove portion is provided in the circumferential direction. It is formed by a support wall provided and supporting the connection plate from both sides in the radial direction, and partition walls provided at both ends in the circumferential direction of the support wall .

According to the present application, the bobbin integrated with the coil by winding the conductor wire has a container-shaped groove, and the protruding portion of the connection plate is fixed in the adhesive in the bobbin, so that the bobbin rotates. The connection plate can be fixed corresponding to a plurality of coils arranged in the circumferential direction of the shaft.

Further, since the adhesive is only used for the container-shaped groove of the bobbin, the adhesive is not used in the entire circumferential direction of the rotating shaft of the rotary electric machine, and the manufacturing cost can be reduced.

It is a schematic diagram which shows the cross section of the rotary electric machine which concerns on Embodiment 1 of this application. It is a perspective view which shows the whole armature of the rotary electric machine which concerns on Embodiment 1 of this application. It is a perspective view which shows the coil of the rotary electric machine which concerns on Embodiment 1 of this application. It is a figure which shows the bobbin of the rotary electric machine which concerns on Embodiment 1 of this application, (A) is a perspective view, (B) is a plan view, (C) is a side view. It is a perspective view and a partially enlarged view which shows the connection plate of the rotary electric machine which concerns on Embodiment 1 of this application. It is a perspective view for demonstrating the manufacturing process of the armature of the rotary electric machine which concerns on Embodiment 1 of this application. It is a perspective view for demonstrating the manufacturing process of the armature of the rotary electric machine which concerns on Embodiment 1 of this application. It is a schematic diagram for demonstrating the manufacturing process of the armature of the rotary electric machine which concerns on Embodiment 1 of this application. It is a perspective view for demonstrating the manufacturing process of the armature of the rotary electric machine which concerns on Embodiment 1 of this application. It is a schematic diagram which shows the fixing method of the connection plate of the rotary electric machine which concerns on Embodiment 1 of this application. It is a schematic diagram which shows the connection plate of the rotary electric machine which concerns on Embodiment 1 of this application. It is a schematic view which shows the connection plate of the rotary electric machine which concerns on Embodiment 2 of this application, (A) is the perspective view, (B) to (E) are the partially enlarged views which show the structure of the protrusion. It is a schematic diagram which shows the connection plate of the rotary electric machine which concerns on Embodiment 3 of this application. It is a schematic diagram which shows the fixing method of the connection plate of the rotary electric machine which concerns on Embodiment 3 of this application.

Embodiment 1.
FIG. 1 is a schematic view showing a cross section of a rotary electric machine according to a first embodiment of the present application. In FIG. 1, the rotary electric machine 100 includes a housing 210 composed of a bottomed cylindrical frame 211 and an end plate 212 that closes an opening of the frame 211, and an armature fixed to the cylindrical portion of the frame 211 in an inwardly fitted state. The 300, the bottom of the frame 211, and the end plate 212 are rotatably supported via a bearing 201, and are provided with a rotor 400 arranged on the inner peripheral side of the armature 300.

The armature 300 is composed of a plurality of coils 310 that generate magnetic flux, a connection plate 320 that distributes current to the plurality of coils 310, and an iron core 330 that allows magnetic flux to flow. The coil 310 and the iron core 330 are electrically operated by a bobbin 311. Insulated in.

The rotor 400 is, for example, a permanent magnet type rotor, and is embedded in a cylindrical rotor core 402 in which the axial center position is inserted into the rotating shaft 401 and on the outer peripheral surface side of the rotor core 402. It includes permanent magnets 403 that are arranged at a predetermined pitch in the circumferential direction to form magnetic poles. The rotor 400 is not limited to such a permanent magnet type rotor, and a so-called cage type rotor, winding type rotor, or the like may be used.

FIG. 2 is a perspective view showing the entire armature 300 of the rotary electric machine according to the first embodiment. A plurality of coils 310 formed by sandwiching bobbins 311 at both ends of the iron core 330 are arranged radially at equal pitches in the circumferential direction of the rotating shaft 401.

FIG. 3 shows a perspective view of the coil 310. As shown in FIG. 3, a yoke 332 for connecting the teeth 331 and the teeth 331 on the outer diameter side in the circumferential direction is provided, and the iron core 330 is formed by laminating a plurality of steel plates, and the iron core 330 is composed of insulating materials at both ends. It has a coil 310 into which a bobbin 311 is inserted and a conductor wire having an insulating coating is wound around it. This conductor wire may be a copper wire or an aluminum wire. The iron core 330 is divided into the same number as the teeth 331 in the circumferential direction by the yoke 332. In the first embodiment, an iron core divided in the circumferential direction is used, but all the iron cores 330 may be an integral iron core connected by a yoke 332, or the yoke 332 may be connected by a thin wall to form a straight line. It may be an iron core that can be deployed.

As shown in FIG. 3, one tooth 331 is provided with a sheet-shaped slot cell 313 made of polyphenylene sulfide resin or meta-aramid fiber that electrically separates the coil 310 and the iron core 330, and bobbins 311 are placed on both ends of the iron core 330. By inserting it, it is fixed and insulation assembly is performed. The slot cell 313 may be fixed by attaching double-sided tape to the side surface of the iron core 330.

As shown in FIG. 4, the bobbin 311 includes a body portion 315 around which the coil 310 is wound and a wall portion 316 for arranging the windings in predetermined positions. A holder portion 317 provided with a comb-shaped support wall 317a so as to support the connection plate 320 on the yoke 332 side of the wall portion 316, and an adhesive for fixing the connection plate 320 are stored in the lower portion of the holder portion 317. There is a container-shaped groove 318. The groove portion 318 is provided between the holder portion 317 and the support wall 317a in the circumferential direction of the rotating shaft 401, and is formed in a container shape by providing partition walls 317b at both ends in the circumferential direction. In the first embodiment, the holder portion 317 is arranged on the yoke 332 side, but may be arranged on the rotor 400 side in consideration of mountability on a vehicle.

FIG. 5 shows an overall view of the connection plate 320 of the first embodiment and an enlarged view of a part thereof. The connection plate 320 is formed by punching a strip-shaped guiding material with a press. The connection plate 320 is composed of a power feeding unit 321 that joins the coil 310, a power feeding unit (not shown) to which electric power is supplied, and a protruding portion 323 that connects to the bobbin 311. The protruding portion 323 is provided with pull-out prevention portions 324 protruding on both sides of the connecting plate 320 in the longitudinal direction.

The manufacturing process of the armature 300 will be described with reference to FIGS. 6 to 9. FIG. 6 shows a state in which iron cores 330 having coils 310 are arranged in an annular shape. The iron core 330 is press-fitted into the frame 211 and integrated as shown in FIG. Here, in order to integrate the iron cores 330, a method such as welding or bonding the iron cores 330 to each other may be used.

After integrating the iron core 330, the adhesive 500 is injected into the container-shaped groove 318 of the bobbin 311 using the nozzle 501 as shown in FIG. After that, as shown in FIG. 9, the connection plate 320 is rolled, and the protruding portion 323 is inserted to a position where it is immersed in the adhesive 500 stored in the groove portion 318. The state of the groove portion 318, the protruding portion 323, and the adhesive 500 at this time is shown in FIG.

As can be seen from FIG. 10, the protruding portion 323 of the connection plate 320 is fixed to the container-shaped groove portion 318 with the adhesive 500 stored in the container-shaped groove portion 318. Thereby, the connection plate 320 is fixed to the integrated iron core 330. Since the protruding portion 323 of the connection plate inserted into the container-shaped groove 318 is fixed so as to be buried in the adhesive, the connection plate is fixed corresponding to a plurality of coils arranged in the circumferential direction of the rotation axis. It is possible to realize a strong fixing in which the connection plate does not fall off even if there is a high vibration as in a vehicle.

In FIG. 9, the protrusion 323 for fixing the connection plate 320 may be provided corresponding to at least one of the plurality of coils 310, but a plurality of protrusions 323 may be provided corresponding to the plurality of coils 310. If it is fixed at a place, stronger fixing strength can be obtained. Further, the adhesive 500 required for adhesion only needs to be injected into the container-shaped groove portion 318 corresponding to the protruding portion 323 that requires adhesion, and the use of unnecessary adhesive 500 can be suppressed and the manufacturing cost can be saved.

Further, the disconnection prevention portion 324 provided on the protrusion 323 shown in FIG. 10 increases the adhesive area, and the connection plate 320 and the bobbin 311 can be firmly fixed. At this time, it is even better if the liquid level of the adhesive 500 is configured to cover the top of the detachment prevention portion 324 as shown in FIG. By doing so, the adhesive 500 wraps around in the direction in which the connecting plate 320 comes off, and an anchor effect can be expected. FIG. 10 shows an example in which the pull-out prevention portion 324 is projected by a concave portion provided in the circumferential direction of the rotating shaft 401, but the same effect can be obtained with a structure in which the convex portion is projected in the circumferential direction as shown in FIG. ..

After that, the armature 300 is obtained by connecting the connection plate 320 and the coil 310. The adhesive 500 may be a heat-curing type or a room-temperature curing type, but in the case of heat-curing, the oxidation of the conductor often affects the joining of the connecting plate 320 and the coil 310, so that the connecting plate 320 and the coil 310 are affected. It is desirable to put it in a heat curing furnace after joining.

Embodiment 2.
In the second embodiment, an example of a structure different from the disconnection prevention portion 324 of the connection plate 320 shown in the first embodiment is shown. In FIG. 12A, the pull-out prevention portion 324 of the second embodiment has a structure in which a convex portion protrudes from the surface of the protruding portion 323 in the radial direction of the rotating shaft 401. The pull-out prevention portion 324 may be formed at the same time by pressing the connection plate 320 at the time of punching, or may be formed after punching and before assembling into the armature. Further, in the figure, the pull-out prevention portion 324 is configured at one place in one protruding portion 323, but a plurality of them may be configured or may be recessed in the recess. It may be configured in a wavy shape like a galvanized iron plate.

With such a configuration, when the bobbin 311 is inserted into the groove portion 318, the backlash in the radial direction can be absorbed and the position of the connection plate 320 can be stably fixed. As a structure of the pull-out prevention portion 324 that absorbs such play in the radial direction, a notch protruding in the radial direction from the protruding portion 323 as shown in FIG. 12 (B) may be provided, or as shown in FIG. 12 (C). The tip of the protruding portion 323 may be bent.

Further, by punching the protrusion 323 into a trapezoidal shape as shown in FIG. 12 (D) or by providing a hole in the protrusion 323 as shown in FIG. 12 (E), the adhesive strength is strengthened by the pull-out prevention portion 324. Can be planned.

Embodiment 3.
FIG. 13 shows a protruding portion 323 of the connection plate 320 according to the third embodiment. In the structure of the third embodiment, the disconnection prevention portion 324 is provided with a recess at the tip of the protruding portion 323 of the connection plate 320. This recess is configured in the insertion direction when assembling into the armature.

Further, the groove portion 318 of the bobbin 311 is provided with a convex portion 319 in the axial direction of the rotating shaft 401, and is configured to fit with the concave portion of the pull-out prevention portion 324 as shown in FIG. The bobbin 311 is often manufactured by injection molding of resin, and since it is undercut, it is easy to mold a convex portion perpendicular to the insertion direction.

Since the concave portion 324 of the protruding portion 323 and the convex portion 319 provided in the groove portion of the bobbin 311 are inserted so as to be fitted in this way, the adhesive area can be increased and the fixing force can be increased. can. It is also possible to improve the accuracy of the mounting position of the rotating shaft 401 in the circumferential direction when the connecting plate 320 is inserted.

Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are applications of a particular embodiment. It is not limited to, but can be applied to embodiments alone or in various combinations. Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

100 rotary electric machine, 201 bearing, 210 housing, 211 frame, 212 end plate, 300 armature, 310 coil, 311 bobbin, 313 slot cell, 315 body, 316 wall, 317 holder, 317a support wall, 317b partition, 318 groove part, 319 convex part, 320 connection plate, 321 feeding part, 323 protruding part, 324 pull-out prevention part, 330 iron core, 331 teeth, 332 yoke, 400 rotor, 401 rotating shaft, 402 rotor core, 403 permanent magnet, 500 adhesive, 501 nozzles

Claims (5)

A bobbin provided at the end of the iron core and having a container-shaped groove,
A coil in which a conductor wire is wound around the bobbin,
While distributing the current to the plurality of the coils arranged around the axis of rotation,
A wiring plate that is buried in the adhesive stored in the container-shaped groove and has a protruding portion fixed to it.
Equipped with a,
The connection plate has an annular shape, and the protrusions are provided corresponding to the plurality of the coils.
The container-shaped groove is a rotary electric machine formed by a support wall provided in the circumferential direction and supporting the connection plate from both sides in the radial direction, and partition walls provided at both ends in the circumferential direction of the support wall. The rotary electric machine according to claim 1, wherein a disconnection prevention portion is provided at the protruding portion of the connection plate. The rotary electric machine according to claim 2 , wherein the disconnection prevention portion of the connection plate is formed by a convex portion or a concave portion in the circumferential direction of the rotating shaft. The rotary electric machine according to claim 2 , wherein the disconnection prevention portion of the connection plate is formed by a convex portion or a concave portion in the radial direction of the rotating shaft. The rotary electric machine according to claim 1, wherein the protruding portion of the connecting plate has a concave portion in the axial direction of the rotating shaft, and the groove portion has a convex portion in the axial direction so as to be fitted in the concave portion.

Images