JP6804503B2 - Rotating electric machine and manufacturing method of rotating electric machine - Google Patents

Description

This application relates to a rotary electric machine having a connecting portion for electrically connecting a stator coil and a method for manufacturing the same.

Conventionally, there has been a stator of a rotary electric machine provided with three terminals for supplying power to a three-phase star connection winding. Among such rotary electric machines, there is an inner rotor type DC motor in which a rotor portion having a permanent magnet is installed inside. In this inner rotor type DC motor, a split core in which the stator of the stator is divided into a plurality of parts is adopted as a means for improving workability when the coil is wound at a high density. In this split core, by winding the coils in the same phase continuously without cutting, the number of connections at the winding end is determined by the terminal that supplies power and the terminal that connects the end of each phase. By making it twice, the production cost is reduced.

A thermal caulking method called fusing is used for joining the coil and each terminal. For fusing, a fusing connection part is provided in the shape of sandwiching an insulation-coated electric wire in the terminal, the insulation-coated wire is sandwiched there, and a current is passed while pressurizing the connection part to generate heat. By melting the insulating coating of the electric wire and crushing the terminal and the coil while peeling off the insulating coating, the core wire of the insulating coated electric wire and the connection terminal are joined. As a result, the terminal and the winding are electrically connected. Fusing can make electrical connections as a highly productive processing method. However, in fusing, in order to make a stable electrical connection, it is necessary to arrange an insulating coated electric wire at a predetermined position in the fusing connection part, pressurize the terminal and press an electrode for passing a current. It is necessary to provide a space around the terminal.

Further, in order to improve the efficiency of the rotary electric machine, a coil having a large winding cross section tends to be used for winding the stator to each phase for the purpose of reducing the winding resistance. When the coil has a large winding cross section, the rigidity of the coil increases, and in the winding process, the winding machine needs to apply a larger load when arranging, and the coil is operated after the winding and the entanglement operation to the terminal. There is a problem that the amount of springback is large (see, for example, Patent Document 1 and Patent Document 2 below).

JP-A-2017-103913 Japanese Unexamined Patent Publication No. 2013-212020

In the shape of the fusing connection portion of the terminal seen in Patent Document 1, when the coil is entwined with the fusing connection portion after the coil is wound around the stator, the coil is fused due to the tension received from the winding end portion of the coil. There is a risk of springing back in the direction away from the base of the part. In fusing, electricity is passed through the terminals to generate heat, which is transmitted to the coil to peel off the coating. Therefore, if the coil position in the fusing connection is not stable, heat will not be transferred to the coil well and the coating will melt. May become unstable and the electrical connection of the fusing may become unstable.
Further, in the stator structure seen in Patent Document 2, in order to prevent the terminal from being deformed by the tension applied to the coil, the coil is wound around the insulating support member, but the insulating support member is the circumference of the rotary electric machine. There is a problem that it expands in the direction and it becomes difficult to miniaturize the stator.

This application was made in order to solve the above-mentioned problems, and an object of the present invention is to provide a rotary electric machine and a method for manufacturing a rotary electric machine, which can accurately make an electrical connection of a stator coil with a simple configuration. To do.

The rotary electric machine disclosed in this application is mounted on the teeth, a stator having a plurality of teeth and forming a stator, a coil provided on the teeth and having an end portion formed of an insulating coated electric wire, and said. An insulating support member that insulates between the coil and the stator, and a neutral point terminal formed of a plate-shaped member whose root portion is fixed to the insulating support member and whose tip portion protrudes from the coil in the axial direction of the rotary electric machine. Prepare,
The distal end portion of the neutral point terminal, the insulation coated wire is hooked, said engaging portion for generating a springback in insulated wire, the engaging said insulated wire hooked to engagement portion electrically It is characterized in that a joint portion forming a conductive connection portion to be connected is formed.

The method for manufacturing a rotary electric machine disclosed in this application is a stator having a plurality of teeth and forming a stator, a coil applied to the teeth and having an insulating coated electric wire at an end thereof , and a coil attached to the teeth. A neutral point formed by an insulating support member that insulates between the coil and the stator, and a plate-shaped member whose root portion is fixed to the insulating support member and whose tip portion protrudes from the coil in the axial direction of the rotary electric machine. In the manufacturing method of a rotary electric machine equipped with terminals,
A step of hooking the insulating coated electric wire to an engaging portion formed at the tip of the neutral point terminal to generate a springback in the insulating coated electric wire, and a conductive connection portion formed at the tip of the neutral point terminal. It is characterized by including a step of contacting the insulating coated electric wire with the joint portion constituting the above, and fixing the insulating coated electric wire by fusing process in a state where the insulating coated electric wire is pressure-welded by the elastic force of the springback. Is to be.

According to the rotary electric machine disclosed in this application, the conductive connection portion for electrically conducting by pressurizing and heating the insulating coated electric wire constituting the end portion of the coil and the neutral point terminal and joining them is described. Insulated coated electric wires can be reliably pressure-welded, and electrical connection to the neutral point terminal of the coil can be performed accurately with a simple configuration.
Further, according to the method for manufacturing a rotary electric machine disclosed in this application, the electrical connection to the neutral point terminal of the coil is simplified by surely pressure-welding and joining to form a conductive connection portion in a simple process. It is possible to provide a rotary electric machine that can be accurately performed with.

It is a top view which shows the structural example of the stator in the rotary electric machine which concerns on Embodiment 1. FIG. It is a development view explaining the winding structure of the coil in the rotary electric machine which concerns on Embodiment 1. FIG. FIG. 2A shows a top view, and FIG. 2B shows a side view. It is a partial development view which shows the connection process of the neutral point terminal connection part in the rotary electric machine which concerns on Embodiment 1. FIG. FIG. 3A shows a top view, and FIG. 3B shows a side view. It is a partial development view which shows the connection structure of the neutral point terminal connection part in the rotary electric machine which concerns on Embodiment 1. FIG. FIG. 4A shows a top view, and FIG. 4B shows a side view. It is a top view which shows the other structural example of the stator in the rotary electric machine which concerns on Embodiment 1. FIG. It is a partial development view which shows the connection structure of the neutral point terminal connection part of the stator of the rotary electric machine which concerns on Embodiment 2. FIG. 5 is a partially developed view showing a connection configuration of a neutral point terminal connection portion of a stator of a rotary electric machine according to a third embodiment. FIG. 5 is a partially developed view showing another connection configuration example of the neutral point terminal connection portion of the stator of the rotary electric machine according to the third embodiment.

Embodiment 1.
The first embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a top view showing the configuration of a stator in the rotary electric machine according to the first embodiment. FIG. 2 is a development view illustrating a coil winding configuration in the rotary electric machine according to the first embodiment. FIG. 2A shows a top view, and FIG. 2B shows a side view. FIG. 3 is a partially developed view showing a connection process of the neutral point terminal connection portion in the rotary electric machine according to the first embodiment. FIG. 3A shows a top view, and FIG. 3B shows a side view. FIG. 4 is a partially developed view showing a connection configuration of a neutral point terminal connection portion in the rotary electric machine according to the first embodiment. FIG. 4A shows a top view, and FIG. 4B shows a side view. FIG. 5 is a top view showing another configuration example of the stator in the rotary electric machine according to the first embodiment.

The stator 10 of the rotating electric machine is combined with a rotor using, for example, a permanent magnet to form a brushless DC motor. Further, the stator 10 includes a power supply terminal used for supplying power to the winding of the three-phase star connection and a neutral point terminal used for neutral point connection. Further, in the following description, a 6-slot stator will be described as an example.

As shown in FIG. 1, the stator 10 is composed of a stator 31 made of a laminated iron core having six teeth 31a protruding toward the axial center, and a three-phase star connection wound around the teeth 31a by a direct centralized winding method. The coil 41, the power supply terminal 21 used to supply power to the coil 41 as a stator coil, the neutral point terminal 22 used as a neutral point connection, and the stator 31 and the coil 41 are insulated from each other to provide a power supply. An insulating support member 51 for fixing the terminal 21 and an insulating support member 52 for fixing the neutral point terminal are provided.

The stator 31 is formed by punching, for example, an electromagnetic steel sheet having a thickness of about 0.3 to 0.6 mm in a strip shape, laminating them in the axial direction of a rotary electric machine by caulking, welding, welding, or the like. After making a three-phase star connection to the teeth 31a, each of the teeth 31a is bent so as to face the center in the circumferential direction of the rotary electric machine. That is, the stator 10 is configured by bending the stator 31 after winding forward so that the teeth 31a is inside, welding the stator butt portion 32, and fixing the stator 31.

The insulating support members 51 and 52 are provided to insulate between the coil 41 and the stator 31, and are formed by using a thermoplastic resin such as PPS (polyphenylene sulfide) or POM (polyoxymethylene). It is inserted into and mounted on the stator 31 so as to be sandwiched from both ends in the axial direction. Further, the insulating support member 51 has a groove (not shown) for press-fitting the power supply terminal 21, and after winding the coil 41 around the teeth 31a of the stator 31, the end of the coil 41 is outward in the circumferential direction of the rotary electric wire of the stator 31. A groove portion 51a for passing the insulating coated electric wire 41a constituting the portion is provided. The insulating support member 52 is manufactured by being integrally molded with the neutral point terminal 22 to which the three terminals are electrically connected in order to perform the neutral point connection, and the coil 41 is attached to the teeth 31a of the stator 31. A groove 52a is provided for drawing the insulating coated electric wire 41a constituting the end of the coil 41 discharged outward in the circumferential direction of the stator 31 to the inside of the rotary electric machine of the stator 31 after winding. ..

The power supply terminal 21 is press-fitted and fixed in a groove for press-fitting the power supply terminal 21 of the insulating support member 51, and the coil 41 and the power supply terminal 21 are subjected to fusing by hooking the end portion of the coil 41. A conductive connection portion 21a for electrically connecting the above is provided. Similar to the power supply terminal 21, the neutral point terminal 22 is provided with a conduction connection portion 22a for electrically connecting the coil 41 and the neutral point terminal 22 by fusing, and each of U, V, and W is provided. The terminals for three phases are manufactured as one terminal so that the coil 41 can be connected to the neutral point after the phase is wound around the teeth 31a. Further, the tip TP having the conductive connection portion 22a of the neutral point terminal 22 is eccentric in the direction orthogonal to the direction in which the teeth 31a extends toward the center of the axis in a plane orthogonal to the axial direction of the rotary electric machine, and is an insulating support member. The root portion RP fixed to and the tip portion TP that is eccentric are connected in a tapered shape to form an engaging portion LP. The coil 41 and the neutral point terminal 22 are electrically connected by connecting the insulating coated electric wire 41a constituting the end portion of the coil 41 to the conductive connecting portion 22a.

Next, the winding process will be described. U, V, and W phase windings are wound around the teeth 31a of the stator, but since the operation is the same, the U phase winding process will be described. As shown in FIG. 2, in order to improve workability when winding the coil wire of the coil 41 around the teeth 31a of the stator 31, the stator 31 has a linear shape in which the teeth 31a are linearly arranged and developed. The winding process is performed. For the sake of explanation, in the U-phase winding process, the teeth 31a around which the coil wire is wound first is the U1 phase, and the teeth 31a around which the coil wire is wound after the winding around the U1 phase is the U2 phase. It is called. First, the coil wire is entwined around the root of the connection portion 21a of the power supply terminal 21, and the coil wire is wound around the teeth 31a of the U1 phase stator 31.

After winding the coil wire, as shown by the arrow in FIG. 2A, the coil wire is pulled out through the groove 51a of the insulating support member 51 and outward in the circumferential direction of the rotary electric machine of the stator 31, and V1 , Passing through the back surface of the W1 phase insulating support member, passing through the groove portion 52a of the insulating support member 52, and drawing the coil strand inward in the circumferential direction of the rotary electric machine of the stator 31. After pulling in, the coil wire is wound around the teeth 31a of the U2 phase stator, entwined to the root of the conduction connection portion 22a of the neutral point terminal 22, and the coil wire is cut with nippers of an automatic machine or the like. ..

In order to explain the effect of this embodiment, in the winding process described above, the entanglement operation of the conductive connection portion 22a at the neutral point terminal 22 to the root portion will be described in detail. To explain the winding operation, the x, y, and z axes are set as shown in FIG. S1 in FIG. 3B represents a state in which the winding of the U2 phase stator around the teeth 31a is completed.
First, the work nozzle 61 attached to the tip of the insulating coated electric wire 41a and attached to an automatic machine or the like for performing the insertion and wiring work of the insulating coated electric wire 41a is negatively oriented on the x-axis as shown in S2 in FIG. 3 (b). After moving in the direction, by moving the working nozzle 61 in the positive z-axis direction as shown in S3, the insulating coated electric wire 41a forming the end of the coil 41 with the engaging portion LP of the neutral point terminal 22. Hook. After that, as shown in S4 in FIG. 3B, the working nozzle is moved in the positive direction on the x-axis and the negative direction on the z-axis to habit the insulating coated electric wire 41a. After that, the working nozzle 61 is moved in the negative direction on the y-axis as shown in S5 in FIG. 3 (b), and then moved in the negative direction on the x-axis as shown in S6 in FIG. 3 (b). The insulation-coated electric wire 41a is inserted and wired by entwining the conductive connection portion 22a. The insulating coated electric wire 41a is fitted into the joint portion of the conductive connection portion 22a and brought into contact with the joint portion.

The tip of the insulation-coated electric wire 41a, which constitutes the end of the coil 41 and is integrated with the coil strand of the coil 14, is first driven by a routing operation by a work nozzle 61 that grips the free end of the insulation-coated electric wire 41a. The neutral point terminal 22 is inserted and wired from the upper surface shown in FIG. 4 (b) to the lower surface shown in FIG. 4 (b) to engage with the engaging portion LP (FIGS. 3 (b) S1 to S3). Then, the insulating coated electric wire 41a is deformed against its elastic force to add habit (FIG. 3 (b) S4). Then, the insulating coated electric wire 41a is moved toward the conductive connection portion 22a (FIG. 3 (b) S5) and fitted into the joint portion CP (FIG. 3 (b) S6). The tip of the insulation-coated wire 41a is pressed against the joint CP by the elastic restoring force of the insulation-coated wire 41a, and the insulation-coated wire 41a is heated in the pressure-welded state and fixed to the joint CP by the thermal caulking method by fusing. The conductive connection portion 22a and the insulating coated electric wire 41a are electrically conductively connected.

As described above, as shown in S4 in FIG. 3, the working nozzle 61 is moved in the positive direction on the x-axis and the negative direction on the z-axis, and is hung on the engaging portion LP to add a habit, and then the conductive connection portion 22a. By hanging the insulating coated electric wire 41a constituting the end portion of the coil 41, the insulating coated electric wire 41a is subjected to a springback that tends to return in the direction of the arrow shown in S4 in FIG. As a result, a force that moves to the joint portion CP of the conductive connection portion 22a of the neutral point terminal 22 acts on the insulating coated electric wire 41a, and in the fusing process after the winding process, the insulation constituting the end portion of the coil 41 is formed. The position of the covered electric wire 41a is stable, and the quality of the electrical connection can be stabilized.

Further, in the winding process described with reference to FIG. 2, for example, in the plane of FIG. 2B described in the winding process described above, fixing such that the coil wire of the coil 41 is wound counterclockwise. In the case of the child, in the x-axis direction set in FIG. 3A, the connection portion 21a of the power supply terminal 21 is arranged at a position in the negative direction from the center of the teeth, which is the center of the teeth 31a, and the groove portion of the insulating support member 51. By arranging the 51a at a position in the positive direction from the center of the teeth and arranging the groove 52a of the insulating support member 52 in the negative direction from the center of the teeth, it is possible to cross the crossing lines before and after winding the teeth and to make terminals. It is possible to avoid interference with the coil and improve the workability of winding work of an automatic machine or the like. In this case, since the groove 52a of the insulating support member 52 is arranged in the negative direction from the center of the teeth in the x-axis direction set in FIG. 3A, the tip TP of the neutral point terminal 22 is shown in FIG. If the coil is eccentric in the negative direction in the x-axis direction set in (a), the work nozzle 61 and the neutral point terminal 22 interfere with each other when the coil is pulled into the groove 52a.

FIG. 5 shows a configuration in which the stator 10 is covered with the protective member 60 and a case where the tip portion of the neutral point terminal 22 is different from that of the first embodiment by a broken line. When the tip TP of the neutral point terminal 22 is eccentric in the positive direction in the x-axis direction set in FIG. 3A and the connection portion 22a is arranged in the positive direction, the position indicated by the hatch frame in FIG. The connection portion 22a is arranged in, for example, in a structure for covering the protective member 60 stator 10 made of a thermoplastic resin such as PPS or POM for the purpose of protecting the coil. The point terminal 22 is located on the outer peripheral side of the stator in the circumferential direction of the rotary electric machine, which makes it difficult to miniaturize the rotary electric machine.

From the above, as shown in the first embodiment, the tip TP of the neutral point terminal 22 is eccentric in the positive direction in the x-axis direction set in FIG. 3A, and the conduction connection portion 22a is arranged in the negative direction. By doing so, it is possible to avoid interference between the work nozzle and the terminal when pulling into the groove portion 52a, and it is possible to reduce the size when covering with the protective member 60.

Further, since the neutral point terminal 22 has a plate thickness direction in a plane in which the teeth 31a extends in the axial direction on a plane orthogonal to the axial direction of the rotary electric machine, the deformation in the direction in which the teeth 31a extends in the axial center is not possible. Although it is large, the deformation in the direction orthogonal to the direction in which the teeth 31a extends toward the axis is small. Therefore, even if the insulating coated electric wire 41a forming the end of the coil 41 is hooked on the engaging portion LP of the neutral point terminal 22, the deformation of the neutral point terminal 22 can be reduced.
When the windings are clockwise, the same effect can be obtained by arranging them all in the opposite direction.

The stator of the rotary electric machine disclosed in this application includes a stator 31 having a plurality of teeth 31a, insulating support members 51 and 52 applied to the teeth 31a, and teeth provided with the insulating support members 51 and 52. The coil 41 provided on the 41a, the power supply terminal 21 provided on the insulating support member 51 to supply power to the coil 41, and the neutral point connection of the coil 41 provided on the insulating support member 52. The neutral point terminal 22 is provided with a fusing connection portion 22a for electrically connecting the terminal 22 and the coil 41, and the neutral point terminal 22 is a fusing connection. A portion 22a is provided at the terminal tip portion, and the tip portion is eccentric in a direction orthogonal to the direction in which the stator teeth 41a extends in the axial center on a plane orthogonal to the axial direction of the rotary electric machine, and the neutral point. The conductive connection portion 22a of the terminal 22 is arranged outside the rotary electric machine of the neutral point terminal 22 in the circumferential direction.

By hooking the insulating coated electric wire 41a on the engaging portion LP as the eccentric portion of the neutral point terminal 22 and hooking the coil on the root portion RP of the neutral point terminal 22 constituting the fusing connection portion, the insulating coated electric wire 41a With the springback generated in, the insulating coated electric wire 41a can be stably arranged at the root to the fusing connection portion, and the electrical connection at the time of fusing can be stabilized. Further, since the tension applied to the insulating coated electric wire 41a can be applied to the engaging portion LP of the neutral point terminal 22 in a direction in which the engaging portion is not easily deformed, the neutral point terminal 22 constituting the fusing connection portion Deformation can be prevented, and by arranging the neutral point terminal 22 near the root, the layout of the neutral point terminal 22 can be miniaturized, and the stator can be miniaturized.

In the first embodiment, the wiring mode of the insulating coated electric wire 41a to the neutral point terminal 22 is configured as shown in FIGS. 4A and 4B.
In the wiring process, the insulating coated electric wire 41a that constitutes the end of the coil 41 and is integrated with the coil wire of the coil 14 engages with the engaging portion LP of the neutral point terminal 22 to neutralize the tip 41t. The point terminal 22 is inserted from the other surface F2 to one surface F1 to be in a deformed state (see S3 in FIG. 3), and the insulating coated electric wire 41a is deformed against the elasticity of the insulating coated electric wire 41a to form a habit. We (see S4 in FIG. 3), the tip portion 41t of the insulating coated electric wire 41a is fitted and abutted with the joint portion CP of the neutral point terminal 22.

In the preparatory stage of the wiring process, the insulating coated electric wire 41a, which has elasticity and constitutes the end of the coil 41, has a root portion 41r, which is a connection portion with the coil 41, fixed to the coil 41, and the tip portion 41t is free. It is in a free state extending in the axial direction in parallel with the surface F2 at a position above the other surface F2 of the neutral point terminal 22 as an end.
The elastic insulating coated electric wire 41a engages with the engaging portion LP by the insertion wiring operation, and the tip portion 41t is inserted from the other surface F2 of the neutral point terminal 22 to the one surface F1 (see S3 in FIG. 3). .. The engaging portion LP is formed by extending diagonally with respect to the axial direction at one side edge EA of the neutral point terminal 22 and restricts the movement of the insulating coated electric wire 41a in the surface F1 direction and the other side edge EB direction. Is.

The tip 41t of the insulating coated electric wire 41a inserted through one surface F1 of the neutral point terminal 22 is fitted into the joint portion CP of the neutral point terminal 22 and brought into contact with the joint portion CP (see S3 to S6 in FIG. 3). The insulating coated electric wire 41a engages with the engaging portion LP, and the tip portion 41t is inserted from the other surface F2 of the neutral point terminal 22 to the surface F1, so that the engagement with the engaging portion LP causes the direction of the surface F1. The insulated coated electric wire 41a, which is restricted from moving in the direction of the other side edge EB, is deformed from the free state in the direction opposite to the surface F2 against the elastic force, and is deformed by habit (FIG. 3). The insulated coated electric wire 41a is deformed from the free state to the other side edge EB direction against the elastic force, and the tip portion 41t of the insulating coated electric wire 41a is deformed from the free state. By being fitted with the joint portion CP, the insulating coated electric wire 41a returns to the free state from the deformed state, and the restoring force due to elasticity as a so-called springback causes the joint portion CP at the tip portion 41t. It is crimped.
The joint portion CP is provided by bending one side edge EA of the neutral point terminal 22 made of a plate-shaped member, and restricts the movement of the insulating coated electric wire 41a in the direction opposite to the other side edge EB at the bent bend portion. A first joint portion CPa that comes into contact with each other is formed, and is composed of a bent tip member ahead of the bent bent portion and a member having a surface F1 of a portion facing the bent tip member, and an insulating coated electric wire 41a is formed between the two members. The second joint portion CPb to be sandwiched and crimped is formed by both members, and the tip portion 41t of the insulating coated electric wire 41a is in a state of being crimped to the first joint portion CPa and the second joint portion CPb. It is bonded to the pressure-welded state.

Then, in a state where the tip portion 41t of the insulating coated electric wire 41a is in pressure contact with the joint portion CP, the insulating coated electric wire 41a and the neutral point terminal 22 are crimp-bonded by energizing and heating, and the insulating coated electric wire 41a and the joint portion CP are electrically connected. Conducts to the conductive connection portion 22a. At the tip portion 41t of the insulating coated electric wire 41a, the insulating coating of the insulating coated electric wire 41a is melted by energizing and heating, and the core wire of the insulating coated electric wire 41a is bonded to the neutral point terminal 22 in a fixed state to form a conductive connecting portion 22a. It is a thing.

In the rotary electric machine according to the first embodiment, the following configurations are applied as shown in FIGS. 1 to 5.
A stator 31 having a plurality of teeth 31a and forming a stator 10, a coil 41 applied to the teeth 31a, an insulating coated electric wire 41a having elasticity and forming an end of the coil 41, and the coil 41. The neutral point terminal 22 formed of a plate-shaped member protruding in the axial direction, and the neutral point terminal 22 provided on the neutral point terminal 22 and the insulating coated electric wire 41a are joined by pressurizing and heating. The neutral point terminal 22 is provided with a conductive connection portion 22a for electrically conducting the neutral point terminal 22 and the core wire of the insulating coated electric wire 41a in a fixed state, and the neutral point terminal 22 is the root of the neutral point terminal 22. One surface F1 direction of the neutral point terminal 22 of the insulating coated electric wire 41a provided on one side edge EA of the portion RP and inserted from the other surface F2 of the neutral point terminal 22 to one surface F1 and the other. The engaging portion LP that restricts movement in the side edge EB direction, and the one side edge EA provided at the tip portion TP of the neutral point terminal 22 and inserted through one surface F1 of the neutral point terminal 22. The first joint portion CPa that fits and contacts the insulated coated electric wire 41a and restricts movement in the direction opposite to the other side edge EB of the neutral point terminal 22 and in the direction opposite to one surface of the neutral point terminal 22. It also has a joint portion CP composed of a second joint portion CPb, and the joint portion CP constitutes the conduction connection portion 22a that electrically conducts the neutral point terminal 22 and the insulation-coated electric wire 41a. It is characterized by doing.

With this configuration, the insulating coated electric wire is connected to the conductive connecting portion for electrically conducting by pressurizing and heating the neutral point terminal and the insulating coated electric wire constituting the end of the coil. It is possible to provide a rotary electric wire that can be reliably pressed by the restoring force due to the elasticity that returns from the deformed state to the free state in the above, and that the electric connection to the neutral point terminal of the coil can be accurately performed with a simple configuration.

In the method for manufacturing a rotary electric machine according to the first embodiment, the following configuration is applied.
A stator 31 having a plurality of teeth 31a and forming a stator 10, a coil 41 applied to the teeth 31a, an insulating coated electric wire 41a having elasticity and forming an end of the coil 41, and the coil 41. The neutral point terminal 22 formed of a plate-shaped member projecting in the axial direction from the neutral point terminal 22 and the neutral point terminal 22 provided on the neutral point terminal 22 and the insulating coated electric wire 41a are joined by pressurizing and heating. The neutral point terminal 22 is provided on one side edge EA of the root portion RP of the neutral point terminal 22 and is provided with a conduction connection portion 22a for electrically conducting the neutral point terminal 22. The engaging portion LP that restricts the movement of the insulating coated electric wire 41a inserted from the other surface F2 to the one surface F1 in the direction of one surface F1 and the other side edge EB of the neutral point terminal 22 and the said. The neutral point terminal 22 is fitted with the insulating coated electric wire 41a provided on one side edge EA of the tip portion TP of the neutral point terminal 22 and inserted into one surface of the neutral point terminal 22. It has a joint portion CP composed of a first joint portion CPa and a second joint portion CPb that regulates movement in a direction opposite to the other side edge EB and in a direction opposite to one surface of the neutral point terminal 22. In manufacturing a rotary electric machine constituting the conduction connection portion 22a that electrically conducts the neutral point terminal 22 and the insulation-coated electric wire 41a, the joint portion CP uses the insulation-coated electric wire 41a as the neutral point. One surface of the neutral point terminal 22 engaged with an engaging portion LP that regulates the movement of the insulating coated electric wire 41a in the direction of one surface F1 of the terminal and the direction of the other side edge EB of the neutral point terminal. It is inserted into F1 and abuts on the joint portion CP of the neutral point terminal 22, and the tip portion 41t of the insulation coated electric wire 41a is pressed against the joint portion CP of the neutral point terminal 22 by the elastic force of the insulation coated electric wire 41a. It is characterized in that the conduction connection portion 22a that electrically conducts the neutral point terminal 22 and the insulation-coated electric wire 41a is formed by crimp-bonding by energization heating.

By this method, the neutral point of the coil is surely pressed and bonded to the conduction connection portion in a simple process by the restoring force due to the elasticity of the insulated coated electric wire to return from the deformed state to the free state. It is possible to provide a method for manufacturing a rotary electric wire capable of obtaining a rotary electric wire capable of accurately making an electrical connection to a terminal with a simple configuration.

Embodiment 2.
The second embodiment will be described with reference to FIG. FIG. 6 is a partially developed view showing a connection configuration of a neutral point terminal connection portion in the stator of the rotary electric machine according to the second embodiment.
In the stator of the rotary electric machine according to the second embodiment, the shape of the neutral point terminal 22 is different from that of the stator of the first embodiment. Other components are the same as the stator 10 of the rotary electric machine according to the first embodiment.

In the neutral point terminal 22 according to the second embodiment, the conduction connection portion 22a with the insulating coated electric wire 41a constituting the end portion of the coil 41 is inclined in the x-axis positive direction set in FIG. 3A. The one side edge EA of the neutral point terminal 22 extending in the axial direction and having the conduction connection portion 22a at the tip portion TP is inclined in the direction of the other side edge EB.

As a result, the pressure contact force due to the springback generated by hooking the insulating coated electric wire 41a on the engaging portion LP received by the conductive connecting portion 22a is improved, and the position of the insulating coated electric wire 41a in the conductive connecting portion 22a is further stabilized. Can be made to.

In the rotary electric machine according to the second embodiment, as shown in FIG. 6, the following configuration is applied to the configuration according to the first embodiment described above.
In the neutral point terminal 22 formed of the plate-shaped member, one side edge EA is inclined in the direction of the other side edge EB with respect to the axial direction in the extending plane of the neutral point terminal 22, and the other side edge EB is the axis. One side of the neutral point terminal 22 which is formed in a shape inclined in the direction opposite to the one side edge EA with respect to the direction, extends in the axial direction, and has a conductive connection portion 22a at the tip portion TP. The edge EA is characterized in that it is inclined in the direction of the other side edge EB.

With this configuration, it is possible to provide a rotary electric machine that can more reliably pressurize the conduction connection portion and more accurately connect the coil to the neutral point terminal with a simple configuration.

Embodiment 3.
The third embodiment will be described with reference to FIGS. 7 and 8. FIG. 7 is a partially developed view showing a connection configuration of the neutral point terminal connection portion of the stator of the rotary electric machine according to the third embodiment. FIG. 8 is a partially developed view showing another connection configuration example of the neutral point terminal connection portion of the stator of the rotary electric machine according to the third embodiment.
The stator of the rotary electric machine according to the third embodiment is different from the stator of the first embodiment in the shapes of the insulating support member and the neutral point terminal. Other components are the same as the stator 10 of the rotary electric machine according to the first embodiment. The insulating support member 53 according to the third embodiment has an engaging portion LP, and the neutral point terminal 22 has a structure without eccentricity at the tip.

At the root of the neutral point terminal 22 made of a plate-shaped member, an insulating support member 53 made of a plate-shaped member extending in the same direction as the extending direction of the neutral point terminal 22 is provided in connection with each other. The terminal 22 is supported by the insulating support member 53. One and the other surface of the insulating support member 53 are continuous with one and the other surface of the neutral point terminal 22 and extend in the same direction, respectively.

As a result, in the first embodiment, the insulating support member 53 can have the engaging portion LP of the neutral point terminal 22 that has generated the springback of the coil. Therefore, since the neutral point terminal 22 has no eccentric structure, the rigidity of the neutral point terminal 22 is improved. Further, the layout of the neutral point terminal 22 and the insulating support member 53 is improved.
Further, as shown in the modified example of FIG. 8, by providing a locking portion composed of protrusions 53b on the engaging portion LP of the insulating support member 53, it is possible to prevent the insulating coated electric wire 41a from falling into the groove portion 53a. Become.

In the rotary electric machine according to the third embodiment, the following configurations are applied as shown in FIGS. 7 and 8.
A stator 31 having a plurality of teeth 31a and forming a stator 10, a coil 41 applied to the teeth 31a, an insulating coated electric wire 41a having elasticity and forming an end of the coil 41, and the coil 41. The neutral point terminal 22 formed of a plate-shaped member protruding in the axial direction, and the neutral point terminal 22 provided on the neutral point terminal 22 and the insulating coated electric wire 41a are joined by heating and pressurizing. The neutral point terminal 22a is connected to the root portion RP of the neutral point terminal 22 and extends in the same direction as the neutral point terminal 22 to support the neutral point terminal 22. An insulating support member 53 formed of a plate-shaped member is provided, and is provided on one side edge EA of the insulating support member connected to the root portion RP of the neutral point terminal 22 and is provided on one surface of the neutral point terminal. The other side edge EB of the insulation-coated electric wire 41a that engages with the insulation-coated electric wire 41a inserted from the other surface of the insulation-supporting member 53 that is continuous with the other surface of the neutral point terminal. And one of the engaging portion LP that regulates the movement of the neutral point terminal in the other side edge EB direction and the neutral point terminal provided on one side edge EA of the tip portion TP of the neutral point terminal 22. It fits and contacts the tip of the insulating coated electric wire 41a to be inserted into the surface, and abuts in the direction opposite to the other side edge EB of the neutral point terminal 22 and in the direction opposite to one surface of the neutral point terminal 22. It has a joint portion CP that regulates movement, and the joint portion CP constitutes the conduction connection portion 22a that electrically conducts the neutral point terminal 22 and the insulation-coated electric wire 41a. And.

With this configuration, a wiring structure with enhanced rigidity is configured by the neutral point terminal and the insulating member that supports it, and the reliability is improved so that the coil can be accurately connected to the neutral point terminal with a simple configuration. It is possible to provide a rotating electric machine.

Although the stator of 6 slots has been described in the above embodiment, the same effect can be obtained with a stator of 6 slots or more.
Further, the present application is not limited to the above-described embodiment, and it goes without saying that various other application examples and modifications can be taken as long as the gist of the present application described in the claims is not deviated.

10 Stator, 21 Power supply terminal, 21a connection part, 22 Neutral point terminal, 22a Conduction connection part, 31 stator, 31a teeth, 32 stator butt part, 41 coil, 41a insulation coated wire, 51 insulation support member, 51a groove part, 52 Insulated support member, 52a groove, 53 Insulated support member, 53a groove, 60 Protective member, 61 Work nozzle.

Claims (10)

A stator that has multiple teeth and constitutes a stator,
A coil that is applied to the tooth and whose end is made of an insulating coated electric wire,
An insulating support member that is attached to the tooth and insulates between the coil and the stator.
It is provided with a neutral point terminal whose root portion is fixed to the insulating support member and whose tip portion is formed of a plate-shaped member protruding from the coil in the axial direction of the rotary electric machine.
The distal end portion of the neutral point terminal, the insulation coated wire is hooked, said engaging portion for generating a springback in insulated wire, the engaging said insulated wire hooked to engagement portion electrically A rotary electric machine characterized in that a joint portion constituting a conductive connection portion to be connected is formed. The tip of the neutral point terminal is eccentric in a plane orthogonal to the axial direction of the rotary electric machine in a direction orthogonal to the direction in which the tooth extends toward the center of the axis, and the engaging portion has a tapered shape with the root portion. The rotary electric machine according to claim 1, wherein the joint portion is connected and is arranged outside in the circumferential direction of the rotary electric machine. The second aspect of claim 2, wherein the joint portion is arranged near the center of the teeth in a direction orthogonal to the direction in which the teeth extend toward the center of the axis in a plane orthogonal to the axial direction of the rotary electric machine. Rotating electric machine. The rotary electric machine according to any one of claims 1 to 3, wherein the joint portion is provided by bending one side edge of the tip portion of the neutral point terminal. Claims 1 to claim 1, wherein the neutral point terminal extends in the axial direction of the rotary electric machine and the circumferential direction of the rotary electric machine, and the joint portion is formed on the outer peripheral side of the neutral point terminal. The rotary electric machine according to any one of up to 4. The rotary electric machine according to any one of claims 1 to 5, wherein the conductive connection portion is arranged at a position corresponding to a central portion in the circumferential direction of the teeth. Any one of claims 1 to 6, wherein the joint portion is inclined in a direction orthogonal to the direction in which the teeth extend toward the center of the axis in a plane orthogonal to the axial direction of the rotary electric machine. The rotary electric machine described in the section. The rotary electric machine according to claim 1, wherein the engaging portion is formed on one side edge of the insulating support member corresponding to the tip end portion of the neutral point terminal. The rotary electric machine according to claim 8, wherein the engaging portion of the insulating support member is provided with a locking portion formed of a protrusion for preventing the insulating coated electric wire from falling. A stator that has multiple teeth and constitutes a stator,
A coil that is applied to the tooth and whose end is made of an insulating coated electric wire,
An insulating support member that is attached to the tooth and insulates between the coil and the stator.
The root portion is fixed to the insulating support member, the tip portion is formed of a plate-shaped member projecting from the coil in the axial direction of the rotary electric machine, and a conductive connecting portion electrically connected to the insulating coated electric wire is formed. In the manufacturing method of a rotary electric machine equipped with a neutral point terminal,
A step of hooking the insulating coated electric wire to an engaging portion provided at the tip of the neutral point terminal to generate a springback in the insulating coated electric wire.
The insulating coated electric wire is brought into contact with the joint portion formed at the tip of the neutral point terminal, and the insulated coated electric wire is fused by the elastic force of the springback. A method for manufacturing a rotary electric wire, which comprises a step of fixing.

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