JP7338382B2 - POWER DISTRIBUTION COMPONENTS STRUCTURE FOR ROTATING ELECTRIC MACHINE AND METHOD OF MANUFACTURING POWER DISTRIBUTION COMPONENTS STRUCTURE FOR ROTATING ELECTRIC MACHINE - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power distribution component structure for a rotating electrical machine and a method for manufacturing the power distribution component structure for a rotating electrical machine.

In Patent Document 1, a power distribution member that distributes power to a coil with a concentrated winding structure arranged in a stator of a motor is provided with a connection terminal for joining with an end of the coil, thereby facilitating joining of the coil and the power distribution member. It discloses the technology to

WO2015/083230

However, in the above technology, the connection terminal is formed of a separate member from the power distribution member and the coil, the connection terminal and the power distribution member are connected by caulking, and the connection terminal and the coil are connected by fusing. Since the two connections are made separately by different methods, the manufacturing process becomes complicated, leading to an increase in cost. In addition, it is necessary to have a structure for connecting wires on both sides of the connection terminal, which leads to an increase in material and a decrease in space efficiency.

Accordingly, the present invention provides a power distribution component structure for a rotating electrical machine, and a method for manufacturing a power distribution component structure for a rotating electrical machine, in which electrode terminals for connecting power distribution members and coils are reduced in size, wire connection work is simplified, and space efficiency is improved. intended to provide

A power distribution component structure for a rotating electrical machine according to one aspect of the present invention includes a power distribution member disposed on a stator, and a connection terminal that connects a connection portion between a coil of the stator and the power distribution member, the connection terminal being one of the connection portions. a temporary holding portion for temporarily holding the portion, a terminal portion for connecting the connection portion and the wire end portion of the coil to each other, and a portion of the connection portion which is closer to the power distribution member than the portion temporarily held by the temporary holding portion. and a winding portion to be wound .

According to the above aspect, the connection portion and the connection end portion of the connection terminal are connected at one point, and the connection portion temporarily held by the temporary holding portion and the connection end portion can be connected by one connection operation. This simplifies the work of connecting the connection portion of the power distribution member and the connection end portion of the coil. Since the size of the connection terminal in the radial direction of the stator is sufficient for connecting the connection portion and the wire connection end, the size of the connection terminal can be easily reduced, and space efficiency can be improved.

FIG. 1 is a partial plan view of a power distribution component structure for a rotary electric machine according to this embodiment. FIG. 2 is a side view of an electrode terminal that constitutes this embodiment. FIG. 3 is a front view of an electrode terminal that constitutes this embodiment. FIG. 4 is a plan view of an electrode terminal that constitutes this embodiment. FIG. 5 is a side view of a first modified example of this embodiment. FIG. 6 is a plan view of a first modified example of this embodiment. FIG. 7 is a front view of a second modified example of this embodiment. FIG. 8 is a front view of a third modified example of this embodiment. FIG. 9 is a side view of a fourth modified example of this embodiment. FIG. 10 is a front view of a fourth modified example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Basic configuration of the present embodiment]
FIG. 1 is a partial plan view of a power distribution component structure for a rotary electric machine according to this embodiment. The power distribution component structure of the rotary electric machine of the present embodiment includes a bus ring 3 (power distribution member) and connection terminals 4. The bus ring 3 is attached to the motor stator 2, and the connection terminal 4 is connected to the bus ring 3. It is a connection end portion 211 of the wiring 32 branched from the coil 21 and the coil 21 . The stator 2 is arranged inside the housing 1 of the motor. In the stator 2, a plurality of teeth are formed so as to go around inward in the radial direction, and a plurality of coils 21 are formed by winding a covered electric wire around each tooth.

Although not shown, a cylindrical rotor is arranged inside the stator 2 and at the axial center of the motor. The rotor can rotate about the rotor axis while facing the coil 21 with the side wall of the rotor leaving a predetermined gap.

The bus ring 3 is a ring-shaped member having approximately the same diameter as the stator 2 and is arranged at the upper end of the stator 2 . The bus ring 3 includes a ring-shaped tray 31 and wiring 32 (wiring 32 U, wiring 32 V, wiring 32 W, wiring 32 N) arranged inside the tray 31 . Although not shown, the bus ring 3 has a terminal block, and the terminal block has an external electrode U connected to the wiring 32U, an external electrode V connected to the wiring 32V, and an external electrode W connected to the wiring 32W. are placed.

The wiring 32U (32) is an electric wire through which a U-phase current of three-phase AC flows, the wiring 32V (32) is an electric wire through which V-phase current of a three-phase AC is flowing, and the wiring 32W (32) is an electric wire through which a three-phase AC current flows. is an electric wire through which a W-phase current flows. The wiring 32N (32) is a neutral line of three-phase alternating current.

The wiring 32U (32), the wiring 32V (32), the wiring 32W (32), and the wiring 32N (32) are arranged so as to go around the tray 31, but are branched at positions facing the coil 21. , branched wiring 32U (connection portion), wiring 32V (connection portion), wiring 32W (connection portion), and wiring 32N (connection portion) are connected to the connection terminals 4, respectively.

A connection end portion 211 of the covered electric wire forming the coil 21 extends upward at a position adjacent to the bus ring 3 in the coil 21 , and the end portion of the connection end portion 211 is connected to the connection terminal 4 . Therefore, two connection terminals 4 are used for one coil 21 . The coils 21 are arranged, for example, clockwise, with a coil 21U connected to a U-phase wire 32U and an N-phase wire 32N, a coil 21V connected to a V-phase wire 32V and an N-phase wire 32N, and a W-phase wire 32W. The coil 21W connected to the N-phase wiring 32N is arranged and connected to the wiring 32U, the wiring 32V, the wiring 32W, and the wiring 32N so as to repeat this.

[Electrode terminal]
FIG. 2 is a side view of the connection terminal 4 that constitutes this embodiment. FIG. 3 is a front view of the connection terminal 4 that constitutes this embodiment. FIG. 4 is a plan view of the connection terminal 4 that constitutes this embodiment.

The connection terminal 4 that constitutes the present embodiment is a crimp terminal that fixes a portion of the wiring 32 (a tip or a portion near the tip of the wiring 32 ) and a connection end portion 211 of the coil 21 to each other. The connection terminal 4 is made of, for example, a copper alloy (nickel silver), and is formed by bending a copper alloy plate cut into a predetermined shape.

The connection terminal 4 includes a terminal portion 41 that connects the connection end portion 211 and the wiring 32 to each other, and a winding portion 42 that extends from the terminal portion 41 and around which the wiring 32 is wound. The terminal portion 41 is formed in a U shape by two arms 411 . A connection end portion 211 of the coil 21 is sandwiched between the terminal portions 41 . Therefore, the terminal portion 41 is arranged inside the tray 31 of the bus ring 3 and adjacent to the side wall 311 inside the tray 31 .

A first slit 412 (temporary holding portion) is formed in the base portion of the arm 411 of the terminal portion 41 . The first slit 412 is a portion for temporarily holding the wiring 32 before connection, and a part of the wiring 32 is fitted. Therefore, the width of the first slit 412 is preferably slightly smaller than the diameter of the wire 32 from which the coating is removed. A portion of the wiring 32 is fitted into the first slit 412 while the wiring 32 is inserted inside the two arms 411 . Therefore, by compressing the terminal portion 41 in the direction in which the arms 411 approach each other, the connection end portion 211 and the wiring 32 are crimped, and the connection end portion 211 and the wiring 32 are fixed to each other in a state in which they are in contact with each other. be done.

The wiring 32 is a covered electric wire whose surface is covered with enamel or the like, but the covering is removed at the position where the wiring 32 comes into contact with the connection terminal 4 . The coating is also removed from the connection end 211 . As shown in the figure, in the wiring 32, the diameter of the portion without the coating is smaller than the diameter of the portion with the coating. The width of one slit 412 may be slightly smaller than the diameter of the wire 32 with the coating.

Before the wire 32 is temporarily held in the first slit 412 and before the wire connection end 211 is sandwiched between the terminal portions 41, the coating of the wire 32 and the wire connection end 211 may be peeled off in advance. While the wire 32 is temporarily held in the first slit 412 with the coating still attached, the wire connection end portion 211 is sandwiched between the terminal portions 41, and a high current is applied to the wire 32 and the wire connection end portion 211 when crimping. , the coatings of the wiring 32 and the connection positions of the connection ends 211 with the terminal portions 41 may be evaporated respectively.

The winding portion 42 is arranged to extend from at least the terminal portion 41 along the axial direction of the stator 2 during mounting. The winding portion 42 includes a hook portion 421 extending from the root portion of the arm 411 of the terminal portion 41 and a flat plate portion 422 arranged at the tip of the hook portion 421 . A second slit 423 for sandwiching the wiring 32 is formed in the flat plate portion 422 . As shown in FIG. 3, a recess 424 for inserting the wiring 32 may be formed in the upper portion of the flat plate portion 422 and around the base of the hook portion 421, but this may be omitted. .

During mounting, for example, the hook portion 421 is placed in the groove 312 ( FIG. 4 ) formed in the inner side wall 311 of the bus ring 3 and the flat plate portion 422 is placed in the tray 31 of the bus ring 3 .

At the time of mounting, the hook portion 421 is formed to extend obliquely downward from the lower portion of the terminal portion 41 in a direction away from the terminal portion 41 in a plan view. Also, the wire 32 is wound around the hook portion 421 . In addition, the flat plate portion 422 is arranged in a substantially vertically standing state during mounting.

The wiring 32 branched from the wiring 32 circulating in the bus ring 3 has a portion sandwiched by the second slit 423, a portion wound around the hook portion 421, A portion of the wiring 32 sandwiched between the 1 slits 412 is in contact with. Therefore, a portion of the wiring 32 closer to the bus ring 3 than the portion temporarily held in the first slit 412 is wound around the winding portion 42 .

The connection terminal 4 occupies a radial area corresponding to the thickness of the flat plate portion 422 in the bus ring 3 . In the conventional connection terminal for connecting the wiring 32 and the connection end 211, the portion connected to the connection end 211 and the portion connected to the wiring 32 are separated. 3 and a wiring 32 is connected to the terminal, and the area in the radial direction of the bus ring 3 is occupied by the length of the terminal. Since the length of the terminal is longer than the thickness of the flat plate portion 422, it is necessary to increase the radial dimension of the bus ring 3 accordingly. However, since the connection terminal 4 of the present embodiment occupies only the area in the radial direction of the bus ring 3 corresponding to the thickness of the flat plate portion 422 as described above, the size of the inner diameter of the bus ring 3 is maintained. While the outer diameter can be reduced, the size of the motor can be reduced in the radial direction accordingly.

In the mounting process of the bus ring 3 of this embodiment, the bus ring 3 is attached to the stator 2 while all the wirings 32 branched from the wirings 32 circulating in the bus ring 3 are temporarily held in the connection terminals 4 (terminal portions 41). The connection end 211 of the coil 21 is inserted into the terminal portion 41 of the connection terminal 4, and the terminal portion 41 is compressed and deformed with a crimping tool to crimp the connection end 211 and the wiring 32, thereby tightening the connection end. 211 and wiring 32 are fixed to each other. Here, when crimping, a high current may be applied to the connection position of the connection end 211 with the terminal portion 41 and the connection position of the wiring 32 with the terminal portion 41 to evaporate the coating, or the bus ring 3 may be removed. Before attaching to the stator 2, the coating at each connection position may be stripped in advance.

[First modification]
FIG. 5 is a side view of a first modified example of this embodiment. FIG. 6 is a plan view of a first modified example of this embodiment. In the first modified example of the present embodiment, the first slits 412 of the connection terminals 4 are omitted. A portion of the wiring 32 connected to the connection terminal 4 is wound around the arm 411 of the terminal portion 41, and the portion of the arm 411 around which the wiring 32 is wound serves as a temporary holding portion. In the first modified example, it is preferable that the portion of the wiring 32 wound around the arm 411 is stripped in advance. In the first modification, since the first slit 412 is not formed in the terminal portion 41, the connection terminal 4 can be formed easily.

[Second Modification, Third Modification]
FIG. 7 is a front view of a second modified example of this embodiment. FIG. 8 is a front view of a third modified example of this embodiment. In the second modified example and the third modified example of the present embodiment, a plurality of second slits 423 are formed in the flat plate portion 422 of the connection terminal 4 . For example, in the second modification, there are two flat plate portions 422 on the lower side and one on the upper side, for a total of three. In addition, in the third modification, two flat plate portions 422 are formed, one on the lower side and one on the upper side.

In FIG. 7, the wiring 32 is wound once between the second slit 423 on the lower side and the second slit 423 on the upper left side, and is wound once between the second slit 423 on the upper right side and the second slit 423 on the lower side. After that, the wire 32 is wound around the hook portion 421 , and a portion of the wire 32 near the tip is temporarily held in the first slit 412 of the terminal portion 41 .

In FIG. 8, the wiring 32 is wound once between the second slit 423 on the upper left side and the second slit 423 on the lower right side, and then wound around the hook portion 421 so that a portion of the wiring 32 near the tip is a terminal. It is temporarily held in the first slit 412 of the portion 41 .

By winding the wiring 32 around the flat plate portion 422 using the plurality of second slits 423 as described above, the reliability of holding the wiring 32 on the flat plate portion 422 can be improved, and the risk of the wiring 32 coming off from the first slits 412 can be reduced. .

[Fourth Modification]
FIG. 9 is a side view of a fourth modified example of this embodiment. FIG. 10 is a front view of a fourth modified example. In the fourth modification of the present embodiment, a notch 425 is made from either the left or right edge of a flat plate portion 422 (main body) to form a deformation portion 426 as a part of the flat plate portion 422, and the deformation portion 426 is deformed. The wire 32 wound around the flat plate portion 422 is pressed toward the flat plate portion 422 by bending the wire. As a result, it is possible to prevent the wiring 32 from being detached from the flat plate portion 422 after being wound around the flat plate portion 422 .

[Effect of this embodiment]
According to the power distribution component structure of the rotary electric machine according to the present embodiment, the power distribution member (bus ring 3) arranged in the stator 2 and the connection portion (wiring 32) between the coil 21 of the stator 2 and the power distribution member (bus ring 3). The connection terminal 4 includes a temporary holding portion (arm 411, first slit 412) for temporarily holding a part of the connection portion (wiring 32), and a connection portion (wiring 32 ) and the connection end portion 211 of the coil 21 to each other.

With the above configuration, the connection portion (wiring 32) of the connection terminal 4 and the connection end portion 211 are connected at one point, and the connection portion (wiring 32) is temporarily held by the temporary holding portion (arm 411, first slit 412). ) and the connection end 211 can be connected in one connection operation. This simplifies the work of connecting the connection portion (wiring 32 ) of the power distribution member and the connection end portion 211 of the coil 21 . Since the size of the connection terminal 4 in the radial direction of the stator 2 is sufficient for connecting the connection portion (wiring 32) and the connection end portion 211, the size of the connection terminal 4 can be easily reduced and the space efficiency can be improved. The power distribution component structure of the rotary electric machine can be improved.

In the present embodiment, the terminal portion 41 has a shape (arm 411) capable of sandwiching the connection end portion 211, and the temporary holding portion is a first slit formed in the terminal portion 41 and into which the connection portion (wiring 32) is fitted. 412 , and the connection end 211 and the connection portion (wiring 32 ) are connected to each other by compressing the terminal portion 41 . As a result, the connection portion (wiring 32) can be temporarily held with a simple configuration.

In the present embodiment, the terminal portion 41 has a shape (arm 411) capable of sandwiching the wire connection end portion 211, and the temporary holding portion is a portion of the terminal portion 41 that sandwiches the wire connection end portion 211 and is a connecting portion ( A part of the wire 32) is wound around (arm 411), and the terminal portion 41 is compressed so that the wire connection end portion 211 and the connection portion (wire 32) are connected to each other. As a result, the connection portion (wiring 32) can be temporarily held with a simple configuration.

In this embodiment, the connection terminal 4 is wound at a portion closer to the power distribution member (bus ring 3) than the portion temporarily held by the temporary holding portion (arm 411, first slit 412) of the connection portion (wiring 32). A winding portion 42 is provided. As a result, it is possible to avoid applying a pulling force from the power distribution member (bus ring 3) to a portion of the temporarily held connection portion (wiring 32), thereby improving the reliability of the temporary holding of the connection portion (wiring 32). can increase

In this embodiment, the winding portion 42 is arranged to extend from the terminal portion 41 along the axial direction of the stator 2 . As a result, the radial dimension of the connection terminal 4 in the stator 2 can be reduced, and the radial dimension of the power distribution member (bus ring 3) as a whole can be reduced.

In this embodiment, the winding portion 42 includes a second slit 423 into which the connecting portion (wiring 32) can be fitted. Thereby, the connection portion (wiring 32) wound around the winding portion 42 can be held.

In this embodiment, a plurality of second slits 423 are arranged, and the connection portion (wiring 32 ) is wound around the plurality of second slits 423 . Thereby, the winding of the connection portion (wiring 32) to the winding portion 42 can be made stronger.

In the present embodiment, the winding portion 42 includes a main body (flat plate portion 422) around which the connection portion (wiring 32) is wound, and a connection portion that is a part of the main body (flat plate portion 422) and is wound around the main body (422). and a deformable portion 426 that can be deformed so as to press the portion (wiring 32) toward the main body (flat plate portion 422). As a result, it is possible to suppress fluttering of the connection portion (wiring 32) wound around the winding portion 42 due to an external force, and the winding of the connection portion (wiring 32) around the winding portion 42 can be made stronger. .

According to the method of manufacturing the power distribution component structure of the rotary electric machine according to the present embodiment, the power distribution member (bus ring 3) is arranged on the stator 2, and the connecting portion (wiring 32) of the power distribution member (bus ring 3) and the stator 2 are connected. In the method of connecting the coil 21 using the connection terminal 4 , the connection end 211 of the coil 21 is sandwiched while the connection terminal 4 temporarily holds a part of the connection portion (wiring 32 ), and the connection terminal 4 is compressed. to connect the connection portion (wiring 32) and the connection end portion 211 to each other.

By the above method, the connection portion (wiring 32) and the connection end portion 211 of the connection terminal 4 are connected to one point, and the connection portion (wiring 32) and the connection end portion 211 can be connected by one connection operation. This simplifies the work of connecting the connection portion (wiring 32 ) of the power distribution member and the connection end portion 211 of the coil 21 . Since the size of the connection terminal 4 in the radial direction of the stator 2 is sufficient for connecting the connection portion (wiring 32) and the connection end portion 211, the size of the connection terminal 4 can be easily reduced and the space efficiency can be improved. can be improved.

2 stator 21 coil 211 connection end 3 bus ring 32 wiring 4 connection terminal

Claims (8)

a power distribution member disposed on the stator;
a connection terminal for connecting the coil of the stator and the connection portion of the power distribution member,
The connection terminals are
a temporary holding portion for temporarily holding a portion of the connecting portion;
a terminal portion that connects the connection portion and the connection end portion of the coil to each other;
A power distribution component structure for a rotary electric machine, comprising: a winding portion around which a portion of the connection portion that is closer to the power distribution member than the portion temporarily held by the temporary holding portion is wound. The terminal portion has a shape capable of sandwiching the connection end portion,
The temporary holding portion is a first slit formed in the terminal portion and into which the connection portion is fitted,
2. A power distribution component structure for a rotary electric machine according to claim 1, wherein said terminal portion is compressed so that said connection end portion and said connecting portion are connected to each other. The terminal portion has a shape capable of sandwiching the connection end portion,
The temporary holding portion is a portion that sandwiches the connection end portion of the terminal portion and is a portion around which the part of the connection portion is wound,
2. A power distribution component structure for a rotary electric machine according to claim 1, wherein said terminal portion is compressed so that said connection end portion and said connecting portion are connected to each other. 2. The power distribution component structure of a rotary electric machine according to claim 1 , wherein said winding portion is arranged to extend along the axial direction of said stator from said terminal portion. 2. The power distribution component structure of a rotary electric machine according to claim 1 , wherein said winding portion has a second slit into which said connection portion can be fitted. A plurality of the second slits are arranged,
6. The power distribution component structure of a rotary electric machine according to claim 5 , wherein said connecting portion is wound over a plurality of said second slits. The winding portion includes a main body around which the connection portion is wound,
2. The power distribution component structure of a rotary electric machine according to claim 1 , further comprising a deformable portion which is a part of said main body and is deformable so as to press said connecting portion wound around said main body toward said main body. In a method of arranging a power distribution member on a stator and connecting a connection portion of the power distribution member and a coil of the stator using a connection terminal,
a connection end of the coil is sandwiched in a state in which the connection terminal temporarily holds a part of the connection portion and a portion closer to the power distribution member than the temporarily held portion of the connection portion is wound around the connection terminal;
A method of manufacturing a power distribution component structure for a rotary electric machine, wherein the connection terminal is compressed to connect the connection portion and the connection end portion to each other.

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