WO2019065450A1

WO2019065450A1 - Motor and method for manufacturing motor

Info

Publication number: WO2019065450A1
Application number: PCT/JP2018/034810
Authority: WO
Inventors: 俊輔村上
Original assignee: 日本電産株式会社
Priority date: 2017-09-28
Filing date: 2018-09-20
Publication date: 2019-04-04
Also published as: CN211791014U

Abstract

[Problem] One of the purposes of the present invention is to allow a busbar and a coil wire to be connected without occupying space. In addition, one of the purposes of the present invention is to allow the coil wire to be reliably positioned at a terminal connection section of the busbar. [Solution] This motor 100 is provided with: a rotor 20 having a vertically extending rotation shaft A; a stator 30 having a plurality of coils 33; and a busbar 63 having a connection section 63a electrically connected to the coils 33. The connection section 63a of the busbar has: a penetration section 63g through which a coil wire 34 extending from the coils 33 vertically penetrates; and a caulking section 63h, at least a portion of which protrudes upward from the outer peripheral portion of the penetration section 63g.

Description

Motor and method of manufacturing motor

The present invention relates to a motor and a method of manufacturing the motor.

The motor includes a motor provided with a bus bar electrically connected to the coil. The bus bar has a connection terminal electrically connected to the coil wire. For example, a U-shaped groove is provided in the connection terminal of the bus bar, and the connection terminal of the bus bar and the coil wire are connected by welding or the like in a state where the coil wire is sandwiched in the U-shaped groove Reference 1).

Japanese Patent No. 5153167

When connecting the connection terminal of the bus bar and the coil wire by welding, the connection terminal and the coil wire need to be joined by caulking or the like before welding. When caulking the connection terminal and the coil wire, generally, both are sandwiched by caulking teeth. Therefore, a space for operating the caulking teeth is required on the outer peripheral side of the connection terminal, which reduces the degree of freedom in design.

An object of the present invention is to enable connection between a bus bar and a coil wire in a space-saving manner. Another object is to ensure that the coil wire is reliably positioned at the terminal connection portion of the bus bar.

A motor according to an exemplary embodiment of the present invention includes a rotor having a rotating shaft extending up and down, a stator having a plurality of coils, and a bus bar having a connection portion electrically connected to the coils. The connecting portion of the bus bar has a penetrating portion through which the coil wire extending from the coil penetrates in the vertical direction, and a crimped portion in which at least a portion protrudes upward from the outer peripheral portion of the penetrating portion.

A method of manufacturing a motor according to an exemplary embodiment of the present invention comprises: a rotor having a rotary shaft extending up and down; a stator having a plurality of coils; and a bus bar having a connection portion electrically connected to the coils. And a bus bar holder for holding the bus bar. After the first step of forming the penetrating portion vertically penetrating in the connecting portion, the second step of forming the crimped portion projecting upward from at least a part of the outer peripheral portion of the penetrating portion, and the second step A third step of fixing the bus bar to a predetermined position of the bus bar holder, a fourth step of inserting a coil wire extending from the coil into the through portion, and caulking the coil wire and the crimped portion through the through portion. And 5 steps.

According to the motor and the method of manufacturing the motor according to the exemplary embodiment of the present invention, since the caulking portion protrudes upward from the outer peripheral portion of the penetrating portion, the caulking teeth are operated above the penetrating portion. , The connection part and the coil wire can be crimped. As a result, it is not necessary to provide a space for operating the caulking teeth on the outer peripheral side of the penetrating portion, and the connection between the bus bar and the coil wire can be performed in a space-saving manner.

FIG. 1 is a cross-sectional view of a motor of the present embodiment. FIG. 2 is a perspective view of the stator. FIG. 3 is a perspective view of the bus bar unit. FIG. 4 is a perspective view of a plurality of bus bars arranged in the bus bar unit. FIG. 5 is a view schematically showing a part of a cross section of the bus bar unit. FIG. 6 is a diagram showing a first modification of FIG. FIG. 7 is a view showing a second modification of FIG. FIG. 8 is a view showing a manufacturing process of the motor of the embodiment.

Hereinafter, an embodiment of the present invention will be described based on the drawings. In the drawings used in the following description, for the purpose of emphasizing the characteristic portions, the characteristic portions may be enlarged and shown for convenience, and the dimensional ratio of each component may be limited to the same as the actual Absent. Also, for the same purpose, parts that are not characteristic may be omitted and illustrated.

In the following description, the direction in which the rotation axis A of the rotor 20 extends is simply referred to as “axial direction”, the direction orthogonal to the rotation axis A is simply referred to as “radial direction”, and the direction around the rotation axis A is referred to It is simply called "circumferential direction". Further, the upper side of FIG. 1 in the “axial direction” is simply referred to as “upper side”, and the lower side is simply referred to as “lower side”. Note that the vertical direction does not indicate the positional relationship and direction when it is incorporated into an actual device. In the present embodiment, the vertical direction is substantially the same as the “axial direction”.

FIG. 1 is a cross-sectional view of a motor 100 according to the present embodiment. The motor 100 of the present embodiment is a brushless motor having three phases of U phase, V phase and W phase. The motor 100 includes a housing 10, a rotor 20, a stator 30, a pair of bearings 40, a bearing holder 50, and a bus bar unit 60. In FIG. 1, the bus bar unit 60 is schematically shown by a two-dot chain line.

[Housing 10] The housing 10 accommodates the rotor 20, the stator 30, the pair of bearings 40, the bearing holder 50, and the bus bar unit 60 in the internal space. The housing 10 has a bottomed cylindrical shape and has a cylindrical portion 11 and a bottom portion 12. The cylindrical portion 11 is cylindrical and extends in the axial direction. The bottom 12 is disposed at the lower end of the cylindrical portion 11 and extends radially inward from the lower end of the cylindrical portion 11. The bottom portion 12 has a shaft through hole 12 a and a bearing holding portion 12 b. The shaft through hole 12 a is provided at the center of the bottom 12. The bearing holder 12b is provided around the shaft through hole 12a.

[Rotor 20]
The rotor 20 has a shaft 21, a rotor core 22, and a magnet 23.
The shaft 21 extends in the axial direction and is supported by a pair of bearings 40 so as to be rotatable about the rotation axis A. The pair of bearings 40 is held by the bearing holding portion 12 b of the housing 10 and the bearing holding portion 50 a of the bearing holder 50.

The rotor core 22 is a laminated steel plate in which a plurality of electromagnetic steel plates are laminated in the axial direction. The rotor core 22 is fixed to a shaft 21 penetrating the center of the rotor core 22 and rotates with the shaft 21. The magnet 23 is fixed to the outer surface of the rotor core 22 and rotates with the rotor core 22 and the shaft 21. Therefore, the rotor 20 in the present embodiment is a rotor used for a surface permanent magnet (SPM) motor. The rotor 20 may be a rotor used in an IPM (Interior Permanent Magnet) motor in which the magnet 23 is embedded in the rotor core 22.

[Stator 30] The stator 30 surrounds the radially outer side of the rotor 20. FIG. 2 is a perspective view of the stator 30. As shown in FIG. As shown in FIG. 1 and FIG. 2, the stator 30 has a plurality of divided stator cores 31, a plurality of insulators 32, and a plurality of coils 33.

The stator core 31 is a laminated steel plate in which a plurality of electromagnetic steel plates are laminated in the axial direction. The plurality of stator cores 31 are arranged in the circumferential direction, and each have a core back 31 a and teeth 31 b. The plurality of core backs 31 a have a cylindrical shape concentric with the rotation axis A. The teeth 31 b extend radially inward from the inner side surface of the core back 31 a. In the present embodiment, twelve teeth 31 b are provided.

The insulator 32 is attached to each tooth 31 b and covers at least a part of the stator core 31. Specifically, the insulator 32 covers at least the upper end surface and the lower end surface of each tooth 31 b. The insulator 32 is formed of, for example, an insulating material such as a resin.

The coil 33 is configured by winding a conductive wire around the teeth 31 b via the insulator 32. The coil 33 is formed of a coil corresponding to any one of the U phase, the V phase, and the W phase, and arranged in the circumferential direction in the order of the U phase, the V phase, and the W phase. The number of coils 33 is twelve, which is the same as the number of teeth 31 b.

As shown in FIG. 2, from each coil 33, a coil wire 34 extends axially upward. From each coil 33, two coil wires 34 of a first coil wire 34a and a second coil wire 34b extend axially upward. The first coil wire 34a is the winding start end of the conducting wire, and the second coil wire 34b is the winding end of the conducting wire. Therefore, the total of the coil wire 34 extended from each coil 33 is 24. In the present embodiment, the first coil wire 34 a extends longer in the axial direction than the second coil wire 34 b. The coil wire 34 is a round wire having a circular cross section. Thereby, the cost of the coil wire 34 can be held down. Further, the coil wire 34 can be easily guided to the guide portion 61 d of the bus bar holder 61 described later. Each of the second coil wires 34b is electrically connected to a plurality of neutral point bus bars (not shown).

[Bearing Holder 50] The bearing holder 50 is made of, for example, an insulating material such as resin. The bearing holder 50 is annular, and is accommodated in the housing 10 at a position above the stator 30. Further, the bearing holder 50 is fixed to the housing 10 immovably in the circumferential direction and the axial direction. Also, the bearing holder 50 is disposed below the bus bar unit 60. However, the bearing holder 50 may be disposed on the upper side of the bus bar unit 60.

The bearing holder 50 has a bearing holding portion 50a for holding one of the pair of bearings 40, and a plurality of passage holes 50b through which the first coil wire 34a penetrates in the vertical direction. Passage hole 50b is provided in the position which overlaps with the 1st coil wire 34a in plane view, and one 1st coil wire 34a passes one passage hole 50b.

The bearing holder 50 may be formed of a metallic material. In this case, the bearing holder 50 is subjected to an insulation treatment, or the first coil wire 34a is coated with an insulating member other than the connecting portions with bus bars 63 to 68 described later, and the bearing holder 50 and the first coil wire 34a It is necessary to prevent short circuit due to

[Bus Bar Unit 60] The bus bar unit 60 is disposed above the bearing holder 50, as shown in FIG. FIG. 3 is a perspective view of the bus bar unit 60. As shown in FIG. FIG. 4 is a perspective view of the plurality of bus bars 63 to 68 arranged in the bus bar unit 60. As shown in FIG. The bus bar unit 60 has a bus bar holder 61, a plurality of terminals 62, and a plurality of bus bars 63 to 68, as shown in FIGS.

[Bus Bar Holder 61] The bus bar holder 61 is molded of insulating resin. In the present embodiment, the bus bar holder 61 and the plurality of bus bars 63 to 68 are integrally molded by resin molding. That is, as shown in FIG. 5 and the like, the bus bars 63 to 68 are molded in the inside of the bus bar holder 61 except for a part thereof. The bus bar holder 61 has a shaft through hole 61a, a plurality of passage holes 61b, and a plurality of terminal holding portions 61c.

The shaft through holes 61 a and the plurality of through holes 61 b axially penetrate the bus bar holder 61. The shaft through hole 61 a is provided at the center of the bus bar holder 61, and the shaft 21 penetrates.

The plurality of passage holes 61b are located radially outward of the shaft through holes 61a, and are spaced apart in the circumferential direction. The first coil wires 34 a drawn from the coils 33 pass one by one through the plurality of passage holes 61 b. Therefore, the number of passage holes 61b in the present embodiment is twelve, which is the same as the number of first coil wires 34a. In FIG. 3, reference numerals are attached to passage holes 61 b in which first connection portions 63 a and second connection portions 63 b of the bus bars 63 described later are disposed, and reference numerals of other passage holes are omitted.

The plurality of terminal holding portions 61c are provided radially outward of the plurality of passage holes 61b. Here, three terminal holding portions 61c are provided at intervals of 120 degrees in the circumferential direction.

[Terminal 62]
The terminal 62 is connected to a circuit board or the like (not shown). In the present embodiment, three terminals 62 corresponding to the U phase, the V phase, and the W phase are respectively held by the terminal holding portion 61 c. Bus bars 63 to 68 corresponding to the phases of the respective terminals 62 are connected to the terminals 62.

[Bus Bars 63 to 68] As shown in FIG. 4, the bus bars 63 to 68 are plate-like members formed of a conductive metal material. As described above, the bus bars 63 to 68 are molded in the bus bar holder 61 without any contact between the bus bars 63 to 68 in a state where they cross each other except for a part. Thus, the contact between the bus bars 63 to 68 and the short circuit due to the contact between the bus bars 63 to 68 and other members can be prevented.

Each of the bus bars 63 to 68 electrically connects the two first coil wires 34 a of the coil wires 34 to the terminals 62. Each of the bus bars 63 to 68 corresponds to one of the U phase, the V phase and the W phase, and two bus bars corresponding to each phase are provided. In the present embodiment, the bus bars 66 and 67 correspond to the U phase, the bus bars 64 and 65 correspond to the V phase, and 63 and 68 correspond to the W phase.

The bus bars 63 to 68 include bus bars whose shapes are different from each other. Hereinafter, the bus bar 63 will be described as an example of the shapes of the bus bars 63 to 68. As shown in FIG. 4, the bus bar 63 has a first connection portion 63a, a second connection portion 63b, a first extension portion 63c, a second extension portion 63d, and a terminal insertion hole 63e.

FIG. 5 is a view schematically showing a part of a cross section of the bus bar unit 60. As shown in FIG. Specifically, it is a view schematically showing a cross section of the first connection portion 63 a when the bus bar 63 is molded in the bus bar holder 61. As shown in FIGS. 4 and 5, the first connection portion 63a has a base portion 63f, a penetration portion 63g, and a crimped portion 63h. The base portion 63f is plate-shaped, and the thickness direction is the same as the vertical direction. In addition, although the bus-bar 63 in this embodiment is plate-shaped other than the base 63f, the bus-bar 63 may not necessarily be plate-shaped.

The penetration part 63g is a circular hole, and penetrates the base 63f in the vertical direction. The penetrating portion 63g is disposed at a position overlapping the passage hole 61b in plan view, and the coil wire 34 extending from the coil 33 penetrates in the vertical direction. Specifically, the first coil wire 34a penetrates the penetrating portion 63g. Thereby, the 1st coil wire 34a can be positioned certainly. The shape of the penetrating portion 63g may be, for example, a non-circular hole such as a quadrangle. Moreover, you may make it open not to a hole but to U shape, for example. That is, penetration part 63g should just be a shape which coil wire 34 can penetrate in the up-and-down direction.

The crimped portion 63 h is provided to join the first coil wire 34 a and the first connection portion 63 a of the bus bar 63. The crimped portion 63 h protrudes upward from at least a part of the outer peripheral portion of the through portion 63 g. Specifically, as shown in FIG. 5, the caulking portion 63 h protrudes above the passage hole 61 b of the bus bar holder 61. In the present embodiment, for example, the caulking portion 63 h is provided so as to protrude upward from all the outer peripheral portions of the through portion 63 g by burring.

As shown in FIGS. 3 and 4, the second connection portion 63 b has the same shape as the first connection portion 63 a. The second connection portion 63 b is connected to another first coil wire 34 a different from the first coil wire 34 a to which the first connection portion 63 a is connected. The second connection portion 63b is disposed at a position overlapping with the passage hole 61b different from the passage hole 61b through which the first connection portion 63a passes in a plan view.

The first extending portion 63c extends linearly in plan view. The first extending portion 63c connects the first connection portion 63a and the second connection portion 63b. The second extending portion 63 d connects the first connection portion 63 a and the terminal insertion hole 63 e. The second extending portion 63d extends in a direction different from that of the first extending portion 63c, and at least a part thereof is curved. The first extending portion 63 c and the second extending portion 63 d are molded in the bus bar holder 61.

The terminal insertion hole 63e is a through hole that penetrates in the axial direction. As shown in FIG. 3, a part of the terminal 62 is inserted into the terminal insertion hole 63e, whereby the terminal 62 and the bus bar 63 are connected.

The bus bars 65 and 67 have the same shape as the bus bar 63. Further, as shown in FIG. 4, the bus bar 64 has a first connection portion 64a, a second connection portion 64b, a first extending portion 64c, a second extending portion 64d, and a terminal insertion hole 64e. The first connection portion 64a, the second connection portion 64b, the first extension portion 64c, and the terminal insertion hole 64e of the bus bar 64 correspond to the first connection portion 63a, the second connection portion 63b, and the first extension portion 63c of the bus bar 63, respectively. , And the same structure as the terminal insertion hole 63e. The second extending portion 64d of the bus bar 64 connects the first extending portion 64c and the terminal insertion hole 64e. Specifically, the second extending portion 64d extends radially outward from a position close to the first connection portion 64a of the first extending portion 64c, and at least a portion thereof is curved. The bus bars 66 and 68 have the same shape as the bus bar 64.

[Guide portion 61d]
As shown in FIGS. 3 and 5, a guide portion 61d is provided below the first connection portion 63a of the bus bar 63 at a position corresponding to the passage hole 61b of the bus bar holder 61. The guide portion 61d is provided to guide the first coil wire 34a to the through portion 63g of the first connection portion 63a. The guide portion 61d has a guide hole 61e extending in the vertical direction. The guide hole 61e is provided at a position overlapping with the penetrating portion 63g in a plan view. Further, the guide hole 61 e is provided at a position overlapping with the passage hole 50 b of the bearing holder 50 in a plan view. The guide hole 61e is cylindrical, and has an inclined portion 61f whose diameter gradually increases from the upper side to the lower side. By providing the inclined portion 61f, even when there is a variation in the position of the first coil wire 34a, the first coil wire 34a can be easily drawn to the penetrating portion 63g. In the present embodiment, the guide portion 61d is provided at a position corresponding to all the passage holes 61b of the bus bar holder 61. However, the guide portion 61d may not necessarily be provided at a position corresponding to all the passage holes 61b. .

As shown in FIG. 5, when caulking the caulking portion 63h and the first coil wire 34a, the caulking tooth 70 disposed on the outer peripheral side of the caulking portion 63h is moved in the direction of the arrow to make the caulking portion 63h and the first caulking portion 1 Squeeze the coil wire 34a. After caulking the caulking portion 63h and the first coil wire 34a, the caulking portion 63h and the first coil wire 34a are fixed by laser welding or the like. Here, the crimped portion 63 h protrudes above the passage hole 61 b of the bus bar holder 61. In other words, the bus bar holder 61 covers the lower side of the crimped portion 63 h. Therefore, it is not necessary to provide a space in which the caulking teeth 70 operate outside the base 63 f of the bus bar 63. For this reason, the connection between the bus bar 63 and the first coil wire 34a can be performed in a space-saving manner. Further, since the crimped portion 63h is formed to project upward from all the outer periphery of the penetrating portion 63g, the crimped portion 63h and the first coil wire 34a can be crimped from any position of the outer peripheral portion of the crimped portion 63h. . This increases the degree of freedom in arranging the caulking teeth 70.

The caulking portion 63h may be provided by raising at least a part of the outer peripheral portion of the penetrating portion 63g in a tapered manner. The crimped portion 63 h may have a shape that can crimp the first coil wire 34 a and the crimped portion 63 h with the crimped teeth 70 above the passage hole 61 b of the bus bar holder 61.

<Modification 1>
FIG. 6 is a view showing a modified example 1 of FIG. In FIG. 6, the same elements as the constituent elements of the embodiment are given the same reference numerals, and the description thereof is omitted. In the first modification, a part of the crimped portion 63 h is molded on the bus bar holder 161. Specifically, the bus bar holder 161 covers the root of the crimped portion 63 h from the outer peripheral side and the upper side. Thus, when the crimped portion 63h and the first coil wire 34a are crimped and then welded, the crimped portion 63h and the first coil wire 34a melt and cover the upper portion of the bus bar holder 161, so the bus bar 63 is a bus bar holder It can be fixed firmly to 161. Further, as shown in FIG. 6, the guide portion 161d may be provided so that the outer diameter gradually increases from the upper side to the lower side.

<Modification 2>
FIG. 7 is a view showing a modified example 2 of FIG. In FIG. 7, the same elements as the constituent elements of the embodiment are given the same reference numerals, and the description thereof will be omitted. In the example shown in FIG. 7, the crimped portion 263 h is configured of a member different from the bus bar 263. That is, another member is joined to the base portion 63f or the through portion 63g, and a crimped portion 263h is provided which protrudes upward from at least a part of the outer peripheral portion of the through portion 63g. Further, in the second modification, the caulking portion 263 h and the guide portion 261 d of the bus bar holder 261 are disposed at overlapping positions in plan view. In this case, the first coil wire 34a can be smoothly passed from the guide portion 261d to the crimped portion 263h.

[Production method]
Next, with reference to FIG. 8, an example of a method of manufacturing the motor 100 according to the present embodiment, in particular, the bus bar unit 60 will be described. The method of manufacturing the motor 100 other than the bus bar unit 60 is the same as the conventional method, and therefore the description thereof is omitted.

In step S1, for example, a bus bar 63 formed by punching a metal plate by pressing is prepared, and a penetrating portion 63g penetrating in the vertical direction is formed in the base portion 63f of the connecting

portions

63a and 63b of the bus bar 63. The shape of the penetrating portion 63g is, for example, a circular hole, a U-shaped notch, or the like, as long as the coil wire 34 can penetrate. The base portions 63f of the

connection portions

63a and 63b of the bus bar 63 are preferably plate-shaped, and preferably have the same thickness direction as the vertical direction. In this case, the penetrating portion 63g can be easily formed in the base portion 63f.

In step S2, a crimped portion 63h protruding upward from at least a part of the outer peripheral portion of the penetrating portion 63g is formed. In the present embodiment, the caulking portion 63 h is formed so as to protrude upward from the entire outer periphery of the through portion 63 g. The crimped portion 63h is formed by, for example, burring. Thereby, the crimped portion 63h can be formed inexpensively and easily. As described above, the caulking portion 63h may have a shape that can be crimped with the coil wire 34 above the base portions 63f of the

connection portions

63a and 63b of the bus bar 63 by the caulking teeth 70.

In step S3, the bus bar 63 having the caulking portion 63h formed in step S2 is fixed to a predetermined position of the bus bar holder 61. Specifically, when the bus bar holder 61 and the bus bar 63 are integrally molded by resin molding, the bus bar 63 is disposed at a predetermined position of a mold for the bus bar holder. Then, the mold is filled with an insulating resin, and the bus bar holder 61 and the bus bar 63 are integrally molded by resin molding. Thus, the bus bar 63 is fixed at a predetermined position of the bus bar holder 61. When the bus bar holder 61 and the bus bar 63 are not integrally molded by resin molding, the bus bar 63 is fixed at a predetermined position of the bus bar holder 61 molded of insulating resin. In any case, the bus bar holder 61 is integrally formed with a guide portion 61 d for guiding the coil wire 34 to the through portion 63 g. The guide portion 61 d is provided below the

connection portions

63 a and 63 b of the bus bar 63. Specifically, the guide portion 61 d is provided at a position overlapping with the penetrating portion 63 g in a plan view.

In step S4, the coil wire 34 extending from the coil 33 is inserted into the through portion 63g. Specifically, the first coil wire 34a is inserted into the through portion 63g via the guide portion 61d of the bus bar holder 61. Here, since the first coil wire 34a is guided to the penetrating portion 63g by the guide portion 61d, workability for passing the first coil wire 34a through the penetrating portion 63g is improved.

In step S5, the first coil wire 34a inserted into the through portion 63g and the caulking portion 63h are crimped. After caulking the caulking portion 63h and the first coil wire 34a, the caulking portion 63h and the first coil wire 34a are fixed by laser welding or the like. Here, the caulking teeth 70 can be moved above the bus bar holder 61 to crimp the

connection portions

63 a and 63 b of the bus bar 63 and the first coil wire 34 a. Therefore, it is not necessary to provide a space in which the caulking teeth 70 move on the outer side in the width direction of the base portion 63f, and the bus bar 63 and the first coil wire 34a can be connected with a space saving.

Further, since the crimped portion 63h is formed to project upward from all the outer periphery of the penetrating portion 63g, the crimped portion 63h and the first coil wire 34a can be crimped from any position of the outer peripheral portion of the crimped portion 63h. . This increases the degree of freedom in arranging the caulking teeth 70. Further, since there is no need for a space in which the caulking teeth 70 move outward in the width direction of the

connection portions

63a and 63b, when the bus bar holder 61 is molded or when the bus bar holder 61 and the bus bar 63 are integrally molded by resin molding. The guide portion 61 d can be integrally molded with the bus bar holder 61.

In detail, in the conventional bus bar holder, it is necessary to provide a space for operating the caulking tooth 70 on the outside in the width direction of the

connection portions

63 a and 63 b of the bus bar 63. Therefore, it is difficult to provide the guide portion 61 d of the bus bar holder 61 below the

connection portions

63 a and 63 b of the bus bar 63. In addition, even if the guide portion 61d can be provided, if the space for operating the caulking teeth 70 is secured at the inner peripheral portion of the guide portion 61d, the inner diameter of the guide portion 61d becomes large. It is difficult to guide the section 63g. However, according to the above-described method of manufacturing the motor 100, the caulking teeth 70 can be operated above the bus bar holder 61, and the coil wire 34 and the caulking portion 63h can be caulked. For this reason, the space for operating the caulking tooth 70 outside the width direction of the

connection portions

63a and 63b becomes unnecessary, and the guide portion 61d having a smaller inside diameter than the conventional one is provided below the

connection portions

63a and 63b of the bus bar 63. Can. Thereby, the coil wire 34 can be guided to the penetration part 63g by the guide part 61d.

Other Embodiments
The present invention is not limited to the embodiments as described above, and the respective configurations and combinations thereof in the embodiments are merely examples, and addition, omission, and substitution of configurations are possible within the scope of the present invention. And other changes are possible.

In the said embodiment, although the coil wire 34 used the round wire of a circular cross section, the coil wire 34 may be a square wire of a cross-sectional rectangular shape. In this case, the contact area between the crimped portion 63h and the coil wire 34 is increased when the crimped portion 63h and the coil wire 34 are crimped, so the connecting

portions

63a and 63b of the bus bar 63 and the first coil wire 34a are rigid Can connect to

In the embodiment, although the bus bar holder 61 and the bus bar 63 are integrally molded by resin molding, when the bus bar holder 61 and the bus bar 63 are not integrally molded, the shape of the caulking portion 63 h is above the base 63 f. The shape may be any shape as long as the first coil wire 34 a and the caulking portion 63 h can be caulked by the caulking tooth 70.

Claims

A rotor having a rotating shaft extending up and down;
A stator having a plurality of coils;
A bus bar having a connecting portion located above the stator and electrically connected to the coil;
Equipped with
The motor according to claim 1, wherein the connecting portion of the bus bar includes a penetrating portion through which a coil wire extending from the coil penetrates in the vertical direction, and a crimped portion projecting upward from at least a part of an outer peripheral portion of the penetrating portion.
It further comprises a bus bar holder for holding the bus bar,
The motor according to claim 1, wherein the bus bar holder has a guide portion provided below the connection portion and guiding the coil wire to the penetration portion of the connection portion.
The motor according to claim 2, wherein the bus bar holder is molded of an insulating resin.
The motor according to claim 2, wherein the bus bar holder and the bus bar are integrally molded by resin molding.
The motor according to any one of claims 2 to 4, wherein the caulking portion and the guide portion are arranged at overlapping positions in plan view.
The motor according to any one of claims 2 to 5, wherein the bus bar holder covers a lower side of the caulking portion.
The guide portion has a guide hole extending in the vertical direction,
The motor according to any one of claims 2 to 6, wherein the guide hole has an inclined portion whose diameter gradually increases from the upper side to the lower side.
The motor according to any one of claims 1 to 7, wherein the penetration portion is a hole.
The motor according to claim 8, wherein the caulking portion protrudes upward from all the outer peripheral portions of the through portion.
The motor according to any one of claims 1 to 9, wherein the connection portion is plate-shaped, and the thickness direction is the same as the vertical direction.
The motor according to any one of claims 1 to 10, wherein the bus bar is plate-like.
The motor according to any one of claims 1 to 11, wherein the coil wire is a round wire having a circular cross section.
The motor according to any one of claims 1 to 11, wherein the coil wire is a rectangular wire having a rectangular cross section.
And a housing for housing the rotor and the stator,
The rotor has a shaft rotatable about the rotation axis,
The motor according to any one of claims 1 to 13, wherein the stator is disposed radially outward of the rotor.
A method of manufacturing a motor comprising: a rotor having a rotary shaft extending up and down, a stator having a plurality of coils, a bus bar having a connection portion electrically connected to the coils, and a bus bar holder for holding the bus bar And
Forming in the connecting portion a penetrating portion penetrating in the vertical direction;
A second step of forming a crimped portion projecting upward from at least a part of an outer peripheral portion of the penetrating portion;
A third step of fixing the bus bar at a predetermined position of the bus bar holder after the second step;
A fourth step of inserting a coil wire extending from the coil into the penetration portion;
The manufacturing method of the motor provided with the 5th process of caulking the said coil wire made to penetrate the said penetration part, and the said crimping part.
The bus bar holder has a guide portion provided below the connection portion and guiding the coil wire to the penetration portion of the connection portion.
The method of manufacturing a motor according to claim 15, wherein in the fourth step, the coil wire is penetrated through the penetrating portion via the guide portion.
The method for manufacturing a motor according to claim 15, wherein the bus bar holder is molded of an insulating resin.
The third step includes the step of disposing the bus bar in a mold for a bus bar holder, filling the mold with an insulating resin, and integrally molding the bus bar holder and the bus bar. The manufacturing method of the motor as described in ,.
The method of manufacturing a motor according to any one of claims 14 to 18, wherein the caulking portion is formed so as to project upward from all the outer circumference of the through portion.
The method for manufacturing a motor according to any one of claims 14 to 19, wherein the caulking portion is formed by burring.