WO2021210326A1 - Terminal module of rotary electric machine - Google Patents

Abstract

The purpose of the present invention is to enable easy connection of a coil wire and a wire connection member. Provided is a terminal module of a rotary electric machine, the terminal module comprising: a coil wire provided to a core of the rotary electric machine; and a wire connection member provided to an end part of the core. The coil wire includes a coil-side connection end part that extends from the end part of the core in a direction parallel to the rotary axis of the rotary electric machine. A press-fitting recess is formed at a position of the wire connection member that opposes the coil-side connection end part. The coil-side connection end part includes a pair of connection parts that extend in a parallel posture with an interval therebetween. The pair of connection parts are press fitted into the press-fitting recess in a state in which the pair of connection parts are deformed so as to narrow the interval therebetween.

Description

Terminal module in rotary electric machine

This disclosure relates to a terminal module in a rotary electric machine.

Patent Document 1 discloses that the bus bar and the square conductor are TIG (Tungsten Inert Gas) welded in a state where the joint end portion of the square conductor is inserted into the notch formed in the bus bar.

Japanese Unexamined Patent Publication No. 2008-148479

According to the technique disclosed in Patent Document 1, the joint end of the square conductor is inserted into the notch of the bus bar, and the bus bar and the square conductor are TIG welded, which makes the connection work complicated.

Therefore, an object of the present disclosure is to facilitate the connection between the coil wire and the connection member.

The terminal module in the rotary electric machine of the present disclosure is a terminal module in the rotary electric machine, and includes a coil wire provided in the core of the rotary electric machine and a connection member provided at the end of the core, and the coil. The wire includes a coil-side connection end extending from the end of the core along a direction parallel to the rotation axis of the rotary electric machine, and is a press-fitting recess at a position of the connection member facing the coil-side connection end. Is formed, and the coil-side connecting end includes a pair of connecting portions extending in a parallel posture at intervals, and the pair of connecting portions are press-fitted into the press-fitting recess in a deformed state so as to narrow between them. It is a terminal module in a rotating electric machine.

According to the present disclosure, the coil wire and the connection member can be easily connected.

FIG. 1 is a partially disassembled schematic perspective view showing a motor. FIG. 2 is a perspective view showing the bus bar and the coil-side connection end. FIG. 3 is a perspective view showing a connection end on the coil side. FIG. 4 is a cross-sectional view showing a state in which the coil-side connection end is press-fitted into the bus bar. FIG. 5 is a front view showing a coil-side connection end portion according to the first modification. FIG. 6 is a front view showing a coil-side connection end portion according to the second modification. FIG. 7 is a front view showing a coil-side connection end portion according to a third modification. FIG. 8 is a front view showing a coil-side connection end portion according to the fourth modification. FIG. 9 is a front view showing the coil side connection end portion according to the fifth modification.

[Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described.

The terminal modules for rotary electricity disclosed in the present disclosure are as follows.

(1) A terminal module in a rotary electric machine, which includes a coil wire provided in the core of the rotary electric machine and a connection member provided at the end of the core, and the coil wire is the end of the core. A press-fitting recess is formed at a position of the connection member facing the coil-side connection end, including a coil-side connection end extending from the portion along a direction parallel to the rotation axis of the rotary electric machine, and the coil side. In a rotary electric machine, the connection end portion includes a pair of connecting portions extending in a parallel posture at intervals, and the pair of connecting portions are press-fitted into the press-fitting recess in a deformed state so as to narrow the space between them. It is a terminal module. According to the present disclosure, a pair of connecting portions are press-fitted into a press-fitting recess in a deformed state so as to narrow between them. Therefore, the insertion load when the coil-side connection end is press-fitted into the press-fitting recess is reduced. As a result, the coil wire and the connection member can be easily connected.

(2) In the terminal module of the rotary electric machine of (1), a through hole is formed between the pair of connection portions of the coil side connection end portions, and the pair of connection portions relates to the through hole. It may be connected at the base end side and the tip end side of the coil side connection end portion. In this case, with the coil-side connecting end being press-fitted into the press-fitting recess, the pair of connecting portions are supported so as to maintain a constant interval at both ends thereof. Therefore, the pair of connecting portions are pressed against the press-fitting recess with a strong force.

(3) In the terminal module of the rotary electric machine of (1), a slit is formed between the pair of connection portions of the coil side connection end portions to open on the tip end side of the coil side connection end portion. The pair of connecting portions may be connected to the slit on the base end side of the coil side connecting end portion. In this case, the coil-side connection end is easily inserted into the press-fitting recess by deforming the pair of connection portions based on the base end side thereof.

(4) The terminal module in any one of the rotary electric machines (1) to (3), and the length dimension of the pair of connection portions is larger than the insertion direction dimension of the coil side connection end portion in the press-fitting recess. May also be large. In this case, since the pair of connecting portions can be deformed in a region larger than the insertion direction dimension in the press-fitting recess, the insertion load is effectively reduced.

(5) A terminal module in a rotary electric machine according to any one of (1) to (4), wherein the pair of connecting portions includes a portion that gradually becomes thicker from the tip end side to the base end side. It may be. In this case, when the coil-side connection end is press-fitted into the press-fitting recess, it is easy to set the insertion load to gradually increase. As a result, the insertion can be performed smoothly.

(6) A terminal module in a rotary electric machine according to any one of (1) to (5), wherein an outward force is applied to the pair of connecting portions between the pair of connecting portions. A unit may be provided. In this case, the pair of connecting portions are pressed against the press-fitting recess while the coil-side connecting end is press-fitted into the press-fitting recess. As a result, the coil-side connection end is firmly electrically and mechanically connected to the connection member.

(7) In the terminal module of the rotary electric machine according to (6), the intervening portion is integrally formed with the pair of connecting portions, and the pair of connecting portions are connected at an intermediate portion in the longitudinal direction of the pair of connecting portions. It may be a part. In this case, when the pair of connecting portions are formed by press working or the like, the connecting portions can be easily formed.

(8) (7) The terminal module in the rotary electric machine, the intervening portion may be located in the press-fitting recess. In this case, the intervening portion in the press-fitting recess can effectively press the pair of connecting portions toward the inner surface of the press-fitting recess.

(9) (6) The terminal module in the rotary electric machine, and the intervening portion may be an elastic member fitted between the pair of connecting portions. In this case, the pair of connecting portions can be pressed toward the inner surface of the press-fitting recess by the elasticity of the elastic member.

Here, it was confirmed that the contact resistance may increase after the high temperature moisture resistance durability test in the connection part using fitting, depending on the connection state. Therefore, the present disclosure includes contents for the purpose of suppressing an increase in contact resistance after durability.

(10) A terminal module in a rotary electric machine according to any one of (1) to (9), even if at least one of the coil-side connection end and the press-fitting recess is plated. good. As a result, performance deterioration after durability is suppressed.

[Details of Embodiments of the present disclosure]
A specific example of the terminal module in the rotary electric machine of the present disclosure will be described below with reference to the drawings. It should be noted that the present disclosure is not limited to these examples, but is indicated by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

[Embodiment]
Hereinafter, the terminal module in the rotary electric machine according to the embodiment will be described. The terminal module in the rotary electric machine connects the coil wire and the connection member in the rotary electric machine. For convenience of explanation, the overall configuration of the motor 10 which is an example of the rotary electric machine will be described. FIG. 1 is a partially disassembled schematic perspective view showing the motor 10.

The motor 10 includes a stator 12 and a rotor 20. In the present embodiment, the rotor 20 is configured to rotate about the rotation axis X in the stator 12. The rotary electric machine may be a generator instead of an electric machine such as a motor 10.

The stator 12 is an armature and includes a stator core 14 and a coil wire 16. The stator core 14 includes a plurality of teeth. The plurality of teeth are provided so as to surround the rotation axis X. A gap is provided between the plurality of teeth around the rotation axis X. The coil wire 16 is provided on the stator core 14. Here, the coil wire 16 is arranged between the plurality of teeth so as to extend in a direction parallel to the rotation axis X. The coil wires 16 between the teeth are connected at the ends of the stator core 14 so as to form a coil that generates a magnetic field for rotating the rotor 20. The coil wires 16 between the teeth may be formed by being integrally formed so as to be directly connected, or may be formed by being welded or the like, or a conductive member provided at the end of the stator core 14 may be formed. It may be connected through. The conductive member may be, for example, a bus bar formed by pressing a metal plate.

In FIG. 1, as an example, an example in which a bus ring 19 is provided on one end side (upper side in FIG. 1) of the stator core 14 is shown. The bus ring 19 is a wiring assembly in which a plurality of bus bars connecting the coil wires 16 are held in a mutually insulated state by a resin and at a position and a posture that can be connected to the coil wires 16. By disposing the bus ring 19 on one end side of the stator core 14, a plurality of coil wires 16 between the teeth are connected to each other in a predetermined combination on one end side of the stator core 14. The connection structure between the bus bar and the coil wire 16 in the bus ring may be the same as the connection structure between the bus bars 40, 50, 60, 70 and the coil wire 16 described later, or other connection structures such as welding. It may be. On the other end side of the stator core 14 (lower side in FIG. 1), the coil wires 16 may be connected to each other by a bus ring in the same manner as described above. The coil wire 16 provided on the stator 12 may be in the form of distributed winding or centralized winding.

The rotor 20 includes a permanent magnet and is rotatably provided in the stator 12. The magnetic field generated by the stator 12 causes the rotor 20 to rotate about the rotation axis X.

The main body case 30 is provided so as to surround the stator 12 and the other end side. Further, a cover 34 is provided so as to cover one end side of the stator 12. Here, a bus ring 19 is provided on one end side of the stator 12. The cover 34 covers one end side of the stator 12 via the bus ring 19.

At least a part of the plurality of coil wires 16 provided on the stator 12 protrudes from one end of the stator 12. Here, the coil wire 16 includes a coil-side connecting end portion 17 extending from the end portion of the stator core 14 along a direction parallel to the rotation axis X. Here, it is assumed that the coil wire 16 is a rectangular conductor having a long cross section (cross section in a plane orthogonal to the extending direction) in one direction. Therefore, the coil-side connection end 17 has an elongated shape extending along a direction parallel to the rotation axis X. It is desirable that the surface of the coil-side connection end 17 is plated. An example of the plating process is electrolytic plating, electroless plating, or the like. The plating layer 17f (see FIG. 4) by the plating treatment may be formed on the entire surface of the coil-side connection end portion 17, or may be formed on the inner peripheral portion of at least the hole portion 43h of the surface of the coil-side connection end portion 17. It may be formed in a contact portion.

Bus bars 40, 50, 60, 70 are provided on one end side of the stator 12 as an example of the wiring member. Bus bars 40, 50, 60, 70 are provided at the ends of the stator core 14. The coil wire 16 is connected to the bus bars 40, 50, 60, 70. The terminal module 38 in the motor 10 described in the present embodiment includes a coil wire 16 and bus bars 40, 50, 60, 70 as connection members, and connects the coil wire 16 and the bus bars 40, 50, 60, 70. Includes the configuration to be used. In the present embodiment, an example centering on a portion connecting the coil wire 16 to an external power source and a portion connecting a plurality of coil wires 16 at a neutral point is shown.

For example, the bus bar 40 is a bus bar for U phase in three-phase alternating current. The bus bar 40 is formed by pressing a metal plate material or the like. The bus bar 40 includes a bus bar main body 42 along a direction orthogonal to the rotation axis X, and an external connection terminal 46 extending in a direction parallel to the rotation axis X.

The bus bar main body 42 is formed in a flat band shape in the direction along the rotation axis X. The bus bar main body 42 extends along the rotation axis X so as to pass through a position where the coil-side connection end 17 of the coil wire 16 to be connected is provided. A bus bar side connecting portion 43 is provided at a position of the bus bar main body portion 42 where the coil side connecting end portion 17 is provided. In the present embodiment, the bus bar main body 42 is formed in a shape extending in an arc shape centered on the rotation axis X. The bus bar main body 42 may have a portion that bends so as to pass through a position where the coil-side connection end 17 to be connected is provided. Bus bar side connecting portions 43 are provided at both ends of the bus bar main body portion 42. The bus bar side connecting portion 43 is formed in a flat shape in a direction orthogonal to the rotation axis X. Here, when the bus bar main body 42 is viewed as a whole, more than half of the bus bar main body 42 is formed to be flat in the direction along the rotation axis X and to have a shape along the direction orthogonal to the rotation axis X. Has been done. The bus bar main body 42 may include a portion that partially protrudes or is recessed in the direction along the rotation axis X.

A hole 43h is formed in the bus bar side connecting portion 43. The hole portion 43h is formed in a shape in which the coil-side connection end portion 17 is inserted while the inner peripheral portion thereof surrounds the entire circumference of the coil-side connection end portion 17. The positions and numbers of the bus bar side connection portion 43 and the hole portion 43h are appropriately set according to the position and number of the coil side connection end portions 17 to be connected. For example, the bus bar side connecting portion 43 and the hole portion 43h may be provided at the intermediate portion in the extending direction of the bus bar main body portion 42. It is desirable that the hole 43h is plated. An example of the plating process is electrolytic plating, electroless plating, or the like. The plating layer 43f (see FIG. 4) by the plating treatment may be formed on the entire surface of the bus bar side connection portion 43, or at least a portion of the surface of the bus bar side connection portion 43 that contacts the coil side connection end portion 17. It may be formed on (the inner peripheral surface of the hole 43h).

The external connection terminal 46 extends from a part of the bus bar main body 42 in the extending direction. The external connection terminal portion 46 extends in a direction parallel to the rotation axis X and penetrates the through hole portion 34h formed in the cover 34. The external connection terminal portion 46 projects to the outside of the cover 34 and is exposed to the outside of the motor 10. The external connection terminal portion 46 is connected to an external power source via another electric wire or the like. The external connection terminal portion 46 may extend from any part in the extending direction of the bus bar main body portion 42. As a result, the pull-out position of the bus bar 40 can be easily set to an arbitrary position. Since the bus bar 40 having the external connection terminal portion 46 is directly connected to the coil side connection end portion 17, the configuration for connecting the coil wire 16 to the outside is simplified.

For example, the bus bar 50 is a bus bar for V phase in three-phase alternating current, and is formed by pressing a metal plate material or the like. The bus bar 50 includes a bus bar main body 52 corresponding to the bus bar main body 42 and an external connection terminal 56 corresponding to the external connection terminal 46.

The bus bar 50 has the same configuration as the bus bar 40, except that the bus bar main body 52 is formed in a shape corresponding to the position of the coil-side connection end 17 to be connected. Here, the bus bar main body 52 is formed in an arc-like shape centered on the rotation axis X, and bus bar side connecting portions 53 are provided at both ends thereof. The bus bar side connection portion 53 has the same configuration as the bus bar side connection portion 43, and has a hole portion 53h corresponding to the hole portion 43h.

For example, the bus bar 60 is a bus bar for W phase in three-phase alternating current, and is formed by pressing a metal plate material or the like. The bus bar 60 includes a bus bar main body 62 corresponding to the bus bar main body 42 and an external connection terminal 66 corresponding to the external connection terminal 46.

The bus bar 60 has the same configuration as the bus bar 40, except that the bus bar main body 62 is formed in a shape corresponding to the position of the coil-side connection end 17 to be connected. Here, the bus bar main body 62 is formed in an arc-like shape centered on the rotation axis X, and bus bar side connecting portions 63 are provided at both ends thereof. The bus bar side connection portion 63 has the same configuration as the bus bar side connection portion 43, and has a hole portion 63h corresponding to the hole portion 43h.

The bus bar 70 is, for example, a bus bar for connecting a neutral point. The bus bar 70 is formed by pressing a metal plate material or the like, and is formed in a flat strip shape in the direction along the rotation axis X. Unlike the bus bars 40, 50, and 60, the bus bar 70 does not have to have an external connection terminal portion. The bus bar 70 extends along the rotation axis X so as to pass through a position where the coil-side connection end 17 of the coil wire 16 to be connected is provided. A bus bar side connecting portion 73 is provided at each of a plurality of positions of the bus bar 70 where the coil side connecting end portion 17 is provided. In the present embodiment, the bus bar 70 extends along the circumferential direction of the circle centered on the rotation axis X as a whole. A plurality of (three in this case) bus bar side connecting portions 73 to which the coil side connecting end portions 17 are connected are provided at both ends of the bus bar 70 and the intermediate portion in the extending direction. Like the bus bar side connecting portion 43, each bus bar side connecting portion 73 is formed in a flat shape in a direction orthogonal to the rotation axis X. Further, each bus bar side connecting portion 73 is formed with a hole portion 73h corresponding to the hole portion 43h.

The bus bars 40, 50, 70, and 60 are arranged on one end side of the stator core 14 (here, outside the bus ring 19) in a state of being arranged in this order toward the outside in the direction along the rotation axis X. The arrangement of the bus bars 40, 50, 70, 60 may be kept constant by the holder. Further, the bus bars 40, 50, 70, 60 may be kept in an insulated state separated from each other by the holder. The holder may be one that has been mold-molded using the bus bars 40, 50, 70, 60 as inserts, or the bus bars 40, 50, 70, 60 are assembled to the separately mold-molded holder. May be good.

In the present embodiment, an example in which the connection member is a bus bar 40, 50, 60, 70 formed of a metal plate material will be mainly described. However, it is not essential that the connecting member is a bus bar. The wiring member may be a square bar-shaped metal member or a round bar-shaped metal member. Any conductive member may be used as long as it can form the press-fitting recess and can electrically connect the coil wire to another portion.

A connection example of the coil side connection end 17 and the bus bar side connection 43, 53, 63, 73 will be described in more detail.

FIG. 2 is a perspective view showing the bus bars 40 and 50 and the coil side connection end portion 17. In FIG. 2, the coil-side connection end 17 is connected to the bus bar 40 before connection, and the coil-side connection end 17 is connected to the bus bar 50. FIG. 3 is a perspective view showing the coil side connection end portion 17. FIG. 4 is a cross-sectional view showing a state in which the coil-side connection end 17 is press-fitted into the bus bar 40. In the following, the description will be mainly focused on an example in which the coil-side connection end 17 is press-fitted into the bus bar 40, but other bus bars and the coil-side connection end 17 can also be applied.

As shown in FIGS. 2 and 3, a hole 43h is formed in the bus bar 40 at a position facing the coil-side connection end 17 as an example of a press-fitting recess. When the bus bar 40 is arranged at the position of the coil-side connecting end 17 in the direction along the rotation axis X, the coil-side connecting end 17 is arranged in the corresponding hole 43h.

In the present embodiment, the press-fitting recess is shown to be a hole 43h penetrating in the thickness direction of the bus bar 40. The press-fitting recess may have a shape that is recessed so that the coil-side connection end 17 can be press-fitted. It is not essential that the press-fitting recess penetrates in the thickness direction of the bus bar 40. For example, the press-fitting recess may be a bottomed hole that is recessed when viewed from the stator core 14 side of the bus bar 40. Further, the press-fitting recess does not have to have a shape in which the entire circumference is surrounded. For example, the press-fitting recess may be a recess formed so as to cut from one side of the bus bar 40.

Further, in the present embodiment, the hole portion 43h is formed in a square shape. More specifically, the hole 43h is formed in a rectangular shape that is long in one direction. The dimension on the short side of the hole 43h is the same as or larger than the thickness of the coil-side connection end 17. The dimension on the long side of the hole 43h is smaller than the width of the coil-side connection end 17 within the range in which the coil-side connection end 17 can be press-fitted. However, the hole 43h may have a circular shape, an elliptical shape, or a polygonal shape. The axial dimension of the hole 43h is a size corresponding to the thickness of the bus bar 40.

As described above, when the coil wire 16 is a flat conductor, the coil side connection end 17 is formed in a rectangular parallelepiped shape. An insulating coating 16a may be formed on the intermediate side of the coil wire 16 with respect to the coil-side connection end portion 17. At the coil-side connection end 17, the insulating coating 16a is removed, and the conductor portion is exposed.

The coil-side connection end 17 includes a pair of connection 18 extending in a parallel posture at intervals. More specifically, a long through hole 17h is formed at the end of the coil-side connection end 17 along the longitudinal direction of the coil-side connection end 17. Here, the through hole 17h is formed in a rectangular shape that is long in one direction. The through hole 17h is located between the pair of connecting portions 18. The base end portions of the pair of connection portions 18 are connected to each other on the base end side of the coil side connection end portion 17 via the base end portion of the coil side connection end portion 17. The tip portions of the pair of connecting portions 18 are connected via the tip end side connecting portion 18a on the tip end side of the coil side connecting end portion 17.

The pair of connecting portions 18 (here, synonymous with the length of the through hole 17h) is larger than the axial length dimension of the hole portion 43h. The axial direction of the hole 43h is the same as the insertion direction of the coil-side connection end 17 with respect to the hole 43h.

The thickness dimension of the coil side connection end 17 is smaller than the dimension of the short side of the hole 43h. The width dimension of the coil side connection end portion 17 is larger than the dimension on the long side side of the hole portion 43h. Therefore, the coil-side connection end 17 is press-fitted into the hole 43h while being deformed.

Both corners at the tip of the coil-side connection end 17 are formed on a guide surface 17g that gradually faces inward toward the tip. When the coil-side connection end 17 is press-fitted into the hole 43h, the guide surface 17g comes into contact with the edge of the hole 43h, so that the coil-side connection end 17 is smoothly guided into the hole 43h.

The coil-side connection end 17 is press-fitted into the hole 43h. In the press-fitting state, the outward portion of the pair of connecting portions 18 is in contact with the inner peripheral portion of the hole portion 43h in a state in which the pair of connecting portions 18 are deformed so as to narrow the space between them.

In the present embodiment, the pair of connecting portions 18 is smaller than the axial dimension of the hole portion 43h. The intermediate portion of the pair of connecting portions 18 in the longitudinal direction is contained in the hole portion 43h. That is, the tip end side end portion and the tip end side connecting portion 18a of the pair of connection portions 18 among the coil side connection end portions 17 are in a state of protruding from the hole portion 43h. Further, of the coil-side connection end portions 17, the proximal end side portion of the pair of connection portions 18 and the portion further on the proximal end side from the proximal end side portion are in a state of not being press-fitted into the hole portion 43h.

Both ends of the pair of connecting portions 18 are maintained at an initial interval by the base end portion of the coil-side connecting end portion 17 and the tip-side connecting portion 18a. Further, the intermediate portion of the pair of connecting portions 18 in the longitudinal direction is deformed so as to be gradually narrowed so as to be contained in the hole portion 43h and kept in contact with the inner peripheral portion of the hole portion 43h. In this state, the elasticity of the pair of connecting portions 18 causes the intermediate portion of the pair of connecting portions 18 in the longitudinal direction to be pressed against the inner peripheral portion of the hole portion 43h. As a result, the coil-side connection end 17 is press-fitted into the hole 43h to prevent disconnection, and the mechanical connection between the coil-side connection end 17 and the bus bar 40 is maintained. Further, the outward surface of the pair of connection portions 18 and the inward surface of the hole portion 43h are in contact with each other, and the coil side connection end portion 17 and the bus bar 40 are maintained in an electrically connected state. In particular, the force by which the pair of connecting portions 18 is pushed outward increases the contact pressure and contact area between the connecting portion 18 and the inward surface of the hole portion 43h, thereby reducing the electrical resistance.

The insertion load is adjusted by adjusting the width between the outward portions of the pair of connecting portions 18, the width of each connecting portion 18 itself, the length of the connecting portion 18, the size of the hole portion 43h, and the like. Can be done.

According to the terminal module 38 in the motor 10 configured in this way, when the coil-side connection end 17 is press-fitted into the holes 43h, 53h, 63h, 73h, the pair of connection 18s are deformed so as to narrow between them. be able to. Therefore, the insertion load when the coil-side connection end 17 is press-fitted into the holes 43h, 53h, 63h, and 73h is reduced. When the coil-side connection end 17 is press-fitted into the holes 43h, 53h, 63h, 73h, the pair of connection 18s are brought into the holes 43h by the elastic force that causes the pair of connection 18s to return to their original shapes. It is pressed against the inward facing surfaces of 53h, 63h, and 73h. As a result, the electrical and mechanical connection between the coil-side connection end 17 and the bus bars 40, 50, 60, 70 is maintained. Therefore, the coil side connection end 17 is press-fitted into the holes 43h, 53h, 63h, 73h with a small insertion load, and the coil side connection end 17 and the bus bars 40, 50, 60, 70 are electrically and mechanically inserted. The coil wire 16 and the bus bars 40, 50, 60, 70 can be easily connected to the coil wire 16.

Further, it is possible to eliminate the welding work between the coil side connection end 17 and the bus bars 40, 50, 60, 70, and from this point as well, the connection between the coil wire 16 and the bus bars 40, 50, 60, 70 is possible. The work can be done easily.

Further, since the through hole 17h is formed between the pair of connecting portions 18, the pair of connecting portions 18 are deformed based on the tip end side and the proximal end side thereof, so that the coil side connecting end portion 17 is a hole portion. It is easily inserted into 43h. Then, with the coil-side connecting end 17 being press-fitted into the hole 43h, both ends of the pair of connecting portions 18 are kept at a constant interval between the tip-side connecting portion 18a and the base end of the coil-side connecting end 17. Is supported by. Therefore, the pair of connecting portions 18 are easily pressed against the inner peripheral portion of the hole portion 43h with a strong force.

Further, the longitudinal dimension of the pair of connecting portions 18 is larger than the axial dimension of the hole portion 43h. Therefore, the pair of connecting portions 18 can be deformed in a region larger than the axial dimension of the hole portion 43h. That is, the pair of connecting portions 18 can be deformed even outside the hole portion 43h, and the intermediate portion in the longitudinal direction of the pair of connecting portions 18 can come into contact with the inner peripheral portion of the hole portion 43h. Therefore, the insertion load is effectively reduced.

Further, the coil side connection end 17 is plated, and the hole 43h, which is an example of the press-fitting recess, is plated. Therefore, in a state where the coil-side connection end 17 is press-fitted into the hole 43h, oxidation of the coil-side connection end 17 and the hole 43h is suppressed. In particular, oxidation of the surface of the mutual contact portion of the coil-side connection end portion 17 and the hole portion 43h is suppressed. As a result, the increase in contact resistance after durability is suppressed, and thus the deterioration of performance after durability is suppressed.

[Modification example]
Various modifications will be described. In the following description, the differences from the coil-side connection end 17 in the above embodiment will be mainly described. Further, in each figure, the approximate position of the bus bar 40 is indicated by a chain double-dashed line.

FIG. 5 is a front view showing the coil side connection end portion 117 according to the first modification. In the above embodiment, the case where the through hole 17h is rectangular has been described, but in the present embodiment, the through hole 117h corresponding to the through hole 17h is an ellipse long along the longitudinal direction of the coil side connection end portion 117. It is formed in a shape. In this modification, the outward portion of the connecting portion 118 corresponding to the pair of connecting portions 18 is linear, and the inward portion is formed in a curved shape recessed in the intermediate portion. Further, the intermediate portion in the longitudinal direction of the connecting portion 118 is the thinnest, and has a shape that gradually becomes thicker toward the tip end side and the proximal end side thereof. Similar to the above, it is desirable that the surface of the coil-side connection end 117 is plated. An example of the plating process is electrolytic plating, electroless plating, or the like.

Even in this modification, when the coil side connection end portion 117 is connected to the hole portion 43h of the bus bar 40, the longitudinal intermediate portion of the pair of connection portions 118 is deformed inward. Therefore, the coil-side connection end 117 is easily inserted into the hole 43h. Further, since the connecting portion 118 is pressed against the inner peripheral portion of the hole portion 43h in the state after press fitting, the coil wire 16 and the bus bar 40 are satisfactorily electrically and mechanically connected.

FIG. 6 is a front view showing the coil side connection end portion 217 according to the second modification. In this modification, the slit 217S is formed between the pair of connecting portions 218 corresponding to the pair of connecting portions 18. The slit 217S is open on the tip end side of the coil side connection end portion 217. That is, in the coil-side connecting end portion 17, the tip portions of the pair of connecting portions 18 are connected via the tip-side connecting portion 18a, but the tip portions of the pair of connecting portions 218 are separated via the slit 217S. It has become. The base end portions of the pair of connection portions 218 are in a state of being connected by the base end side portions of the coil side connection end portions 217. Therefore, the base ends of the pair of connection portions 218 are kept at a constant interval by the base end portions of the coil-side connection end portions 217. On the other hand, the tip portions of the pair of connecting portions 218 can be deformed so as to narrow the width. Similar to the above, it is desirable that the surface of the coil-side connection end 217 is plated. An example of the plating process is electrolytic plating, electroless plating, or the like.

The length dimension of the pair of connecting portions 218 is preferably larger than the axial dimension of the hole portion 43h. As a result, the pair of connecting portions 218 can be deformed so as to reduce the width dimension in the entire hole portion 43h.

When the coil-side connection end portion 217 is inserted into the hole portion 43h, the portion of the pair of connection portions 218 on the tip end side of the base end portion is deformed so as to narrow the width according to the size of the hole portion 43h. .. Therefore, the coil-side connection end portion 217 is easily inserted into the hole portion 43h. Further, after press fitting, the outward portion of the pair of connecting portions 218 is pressed against the inner peripheral portion of the hole portion 43h by the elastic force of the pair of connecting portions 218 to return to the original shape. As a result, the coil-side connection end portion 217 is kept in a state of being electrically and mechanically connected to the hole portion 43h.

If the length dimension of the pair of connecting portions 218 is larger than the axial dimension of the hole portion 43h, the pair of connecting portions 218 can be deformed in a region larger than the insertion direction dimension of the hole portion 43h, so that the insertion portion is effectively inserted. The load is reduced.

In this modified example, the coil side connection end portion 217 is not formed with a portion corresponding to the guide surface 17g. A guide surface similar to the guide surface 17g may be formed on the coil side connection end portion 217.

FIG. 7 is a front view showing the coil side connection end portion 317 according to the third modification. In this modification, the slit 317S is formed between the pair of connection portions 318 corresponding to the pair of connection portions 18, as in the second modification. Like the slit 217S, the slit 317S is open on the tip end side of the coil side connection end portion 317. The shape of the slit 317S is different from the shape of the slit 217S. That is, the slit 317S is formed in a shape that gradually widens from the base end side to the tip end side of the coil side connection end portion 317. Here, the slit 317S is formed in a shape obtained by dividing the ellipse into two in the direction along the long axis. Therefore, the pair of connecting portions 318 are formed in a shape that gradually becomes thicker from the tip end side to the base end side. Here, the outward portion of the pair of connecting portions 318 is formed in a straight line, and the inward portion is formed in a curved curved shape. Similar to the above, it is desirable that the surface of the coil-side connection end 317 is plated. An example of the plating process is electrolytic plating, electroless plating, or the like.

According to this modified example, it has the same effect as the second modified example.

Further, when the coil side connection end portion 317 is press-fitted into the hole portion 43h, the coil side connection end portion 317 is sequentially deformed from the tip side of the pair of connection portions 318. For example, in FIG. 7, when the portion of the coil-side connection end portion 317 on the tip side of the position A is inserted into the hole portion 43h, the tip portions of the pair of connection portions 318 are displaced inward toward the center ( (Refer to P1), the displacement of the base end side portion of the pair of connecting portions 318 is small (see P2). Then, in a state where the coil-side connection end portion 317 is further inserted deeper and the tip end side than the position B is inserted into the hole portion 43h, the base end side portions of the pair of connection portions 318 are also largely displaced (see P3). .. The lengths of the arrows P1, P2, and P3 conceptually indicate the relative displacement amount, and do not represent the actual displacement amount of the connecting portion 318. When the coil side connection end portion 317 is press-fitted into the hole portion 43h, it is easy to set so that the insertion load gradually increases. As a result, sudden changes in the insertion load are suppressed, and the press-fitting operation is smoothly performed. Further, in a state where the coil-side connection end portion 317 is press-fitted into the hole portion 43h, it is easy to maintain a state in which the thick portion at the base end portion of the connection portion 318 presses the connection portion 318 against the inner peripheral portion of the hole portion 43h. Therefore, it is easy to maintain a state in which the coil-side connection end portion 317 is electrically and mechanically well connected to the bus bar 40.

FIG. 8 is a front view showing the coil side connection end portion 417 according to the fourth modification. The coil-side connection end portion 417 has a configuration in which an intervening portion 420 is provided for a shape portion similar to the coil-side connection end portion 217 in the second modification. Similar to the above, it is desirable that the surface of the coil-side connection end 417 is plated. An example of the plating process is electrolytic plating, electroless plating, or the like.

The intervening portion 420 is provided between the pair of connecting portions 218, and exerts an outward force on the pair of connecting portions 218. In this embodiment, the intervening portion 420 is fitted between the pair of connecting portions 218. Here, the intervening portion 420 fills the entire slit 217S. The intervening portion may fill a part of the slit 217S. The intervening portion 420 is kept in a state of being fitted between the pair of connecting portions 218, and is kept in a state of being fitted between the pair of connecting portions 218 by frictional force or the like. The intervening portion 420 is formed of, for example, an elastic member such as rubber.

When the connection end portion 417 on the coil side is press-fitted into the hole portion 43h, the intervening portion 420 can be contracted and deformed as the pair of connecting portions 218 are deformed so as to narrow the width of the slit 217S. .. In a state where the coil-side connection end portion 417 is inserted through the hole portion 43h, the pair of connection portions 218 are pressed outward by the elastic restoring force of the intervening portion 420. Therefore, the pair of connecting portions 218 are pressed toward the inner peripheral portion of the hole portion 43h by its own elastic restoring force and the elastic restoring force of the intervening portion 420. Therefore, the coil-side connection end 417 is firmly electrically and mechanically connected to the bus bar 40.

FIG. 9 is a front view showing the coil side connection end portion 517 according to the fifth modification. The coil-side connection end portion 517 has a configuration in which an intervening portion 520 is provided for a shape portion similar to the coil-side connection end portion 217 in the second modification. Similar to the above, it is desirable that the surface of the coil-side connection end 517 is plated. An example of the plating process is electrolytic plating, electroless plating, or the like.

The intervening portion 520 is provided between the pair of connecting portions 218, and exerts an outward force on the pair of connecting portions 218. In the present embodiment, the intervening portion 520 is integrally formed with the pair of connecting portions 218, and is a portion connecting the pair of connecting portions 218 at the intermediate portion in the longitudinal direction of the pair of connecting portions 218. In the present embodiment, the intervening portion 520 is formed in a shape extending from the inner edge of one connecting portion 218 toward the inner edge of the other connecting portion 218 and bending at the intermediate portion thereof. Here, the intermediate portion in the longitudinal direction of the intervening portion 520 is formed in a shape that bends at an angle toward the base end portion of the slit 217S, that is, a shape that bends in a V shape.

The intervening portion 520 may be curved in a curved line. In any case, the rod-shaped interposition can be bent in the middle to serve as a kind of spring.

Such an intervening portion 520 can be easily formed at the same time when the pair of connecting portions 218 are formed by press working or the like.

When the connection end portion 517 on the coil side is press-fitted into the hole portion 43h, the intervening portion 520 can be contracted and deformed as the pair of connection portions 218 are deformed so as to narrow the width of the slit 217S. .. In particular, the intervening portion 520 can be contracted and deformed by reducing the angle of the bent portion of the intervening portion 520. Then, in a state where the coil-side connection end portion 517 is inserted through the hole portion 43h, the pair of connection portions 218 are pressed outward by the elastic restoring force of the intervening portion 520. Therefore, the pair of connecting portions 218 are pressed toward the inner peripheral portion of the hole portion 43h by its own elastic restoring force and the elastic restoring force of the intervening portion 520. Therefore, the coil-side connection end 517 is firmly electrically and mechanically connected to the bus bar 40.

With the coil-side connection end 517 being press-fitted into the hole 43h, the interposition 520 is preferably located within the hole 43h, that is, within the thickness of the bus bar 40 (with the interposition 520 in FIG. 9). Refer to the positional relationship with the bus bar 40). As a result, the intervening portion 520 can effectively press the pair of connecting portions 218 toward the inner peripheral portion of the hole portion 43h within the hole portion 43h.

The above embodiment or each modification is not limited to the configuration in which both the coil side connection end portions 17, 117, 217, 317, 417, 517 and the hole portion 43h are plated. A configuration may be adopted in which only the coil-side connection ends 17, 117, 217, 317, 417, and 517 are plated, or only the holes 43h are plated. However, the plating treatment does not necessarily have to be performed on the condition that the performance required after durability is ensured.

When plating is applied to the coil side connection ends 17, 117, 217, 317, 417, 517 and the hole 43h, it is desirable that press fitting is performed after the plating treatment.

Note that the configurations described in the above-described embodiment and each modification can be appropriately combined as long as they do not conflict with each other. For example, an intervening portion 420 or an intervening portion 520 may be provided between the pair of connecting portions 18 at the coil-side connecting end portion 17 in the embodiment.

10 Motor (rotary machine)
12 stator 14 stator core (core)
16 Coil wire 16a Insulation coating 17,117,217,317,417,517 Coil side connection end 17g Guide surface 17h, 117h Through hole 17f Plating layer 18, 118, 218, 318 Connection part 18a Tip side connection part 19 Bus ring 20 Rotor 30 Main body case 34 Cover 34h Through hole 38 Terminal module 40, 50, 60, 70 Bus bar (connection member)
42, 52, 62 Busbar body 43, 53, 63, 73 Busbar side connection 43h, 53h, 63h, 73h Holes (press-fitting recesses)
43f Plating layers 46, 56, 66 External connection terminals 217S, 317S Slits 420, 520 Intervening parts X Rotating shaft

Claims (10)

1. It is a terminal module in a rotary electric machine.
   The coil wire provided in the core of the rotary electric machine and
   With the wiring member provided at the end of the core,
   With
   The coil wire includes a coil-side connection end extending from the end of the core along a direction parallel to the rotation axis of the rotary electric machine.
   A press-fitting recess is formed at a position of the connection member facing the coil-side connection end.
   The coil-side connection ends include a pair of joints that extend in parallel at intervals.
   A terminal module in a rotary electric machine, in which the pair of connecting portions are press-fitted into the press-fitting recess in a state of being deformed so as to narrow between them.
2. The terminal module in the rotary electric machine according to claim 1.
   A through hole is formed between the pair of connection portions of the coil-side connection ends.
   A terminal module in a rotary electric machine in which the pair of connecting portions are connected to the through hole at the base end side and the tip end side of the coil side connecting end portion.
3. The terminal module in the rotary electric machine according to claim 1.
   A slit that opens on the tip end side of the coil-side connection end is formed between the pair of coil-side connection ends.
   A terminal module in a rotary electric machine in which the pair of connecting portions are connected to the slit at the base end side of the coil side connecting end portion.
4. The terminal module in the rotary electric machine according to any one of claims 1 to 3.
   A terminal module in a rotary electric machine, wherein the length dimension of the pair of connection portions is larger than the insertion direction dimension of the coil side connection end portion in the press-fitting recess.
5. The terminal module in the rotary electric machine according to any one of claims 1 to 4.
   The pair of connection portions is a terminal module in a rotary electric machine, including a portion that gradually becomes thicker from the tip end side to the base end side.
6. The terminal module in the rotary electric machine according to any one of claims 1 to 5.
   A terminal module in a rotary electric machine, in which an intervening portion for applying an outward force is provided between the pair of connecting portions.
7. The terminal module in the rotary electric machine according to claim 6.
   The intervening portion is a terminal module in a rotary electric machine that is integrally formed with the pair of connecting portions and is a portion that connects the pair of connecting portions at an intermediate portion in the longitudinal direction of the pair of connecting portions.
8. The terminal module in the rotary electric machine according to claim 7.
   The intervening portion is a terminal module in a rotary electric machine located in the press-fitting recess.
9. The terminal module in the rotary electric machine according to claim 6.
   The intervening portion is a terminal module in a rotary electric machine, which is an elastic member fitted between the pair of connecting portions.
10. The terminal module in the rotary electric machine according to any one of claims 1 to 9.
    A terminal module in a rotary electric machine in which at least one of the coil-side connection end and the press-fitting recess is plated.

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