CN211791014U - Motor with a stator having a stator core - Google Patents
Motor with a stator having a stator core Download PDFInfo
- Publication number
- CN211791014U CN211791014U CN201890001093.1U CN201890001093U CN211791014U CN 211791014 U CN211791014 U CN 211791014U CN 201890001093 U CN201890001093 U CN 201890001093U CN 211791014 U CN211791014 U CN 211791014U
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- China
- Prior art keywords
- bus bar
- motor
- section
- coil wire
- pressure
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
Abstract
One of the objects of the present invention is to provide a bus bar and a coil wire which can be connected in a space-saving manner. In addition, one of the objects of the present invention is to position the coil wire reliably at the terminal connecting portion of the bus bar. A motor (100) is provided with: a rotor (20) having a rotation axis (A) extending vertically; a stator (30) having a plurality of coils (33); and a bus bar (63) having a connecting portion (63a) electrically connected to the coil (33). The bus bar connecting part (63a) comprises: a penetration portion (63g) through which a coil wire (34) extending from the coil (33) penetrates in the vertical direction; and a pressure-bonding section (63h) at least a part of which protrudes upward from the outer peripheral section of the through section (63 g).
Description
Technical Field
The utility model relates to a motor.
Background
Some motors include a bus bar electrically connected to a coil. The bus bar has a connection terminal electrically connected to the coil wire. The connection terminal of the bus bar is provided with, for example, a U-shaped groove, 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 (see patent document 1).
Documents of the prior art
Patent document
Patent document 1 Japanese patent No. 5153167
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
In the case of connecting the connection terminals of the bus bar and the coil wire by welding, the connection terminals and the coil wire need to be joined by crimping or the like before welding. When the connection terminal and the coil wire are pressed against each other, they are generally sandwiched between the pressing teeth. Therefore, the outer peripheral side of the connection terminal requires a space for operating the pressure contact teeth, and the degree of freedom in design is reduced.
One of the objects of the present invention is to provide a bus bar and a coil wire which can be connected in a space-saving manner. Further, it is an object to reliably position the coil wire at the terminal connecting portion of the bus bar.
Means for solving the problems
The motor according to an exemplary embodiment of the present invention includes: a rotor having a rotation axis extending in an up-down direction; a stator having a plurality of coils; and a bus bar having a connection portion electrically connected to the coil. The connecting portion of the bus bar has: a penetrating part for penetrating a coil wire extending from the coil in the vertical direction; and a pressure-bonding section at least a part of which protrudes upward from the outer peripheral portion of the through section.
Effect of the utility model
According to the motor and the method of manufacturing the motor of the present invention, the pressure-bonding section protrudes upward from the outer peripheral portion of the through section, and therefore the pressure-bonding teeth can be operated at a position above the through section, and the connection section and the coil wire can be pressure-bonded. This eliminates the need to provide a space for operating the pressure contact teeth on the outer peripheral side of the through portion, and allows the bus bar and the coil wire to be connected in a space-saving manner.
Drawings
Fig. 1 is a sectional view of the 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 diagram schematically showing a part of a cross section of the bus bar unit.
Fig. 6 is a diagram showing a first modification of fig. 5.
Fig. 7 is a diagram showing a second modification of fig. 5.
Fig. 8 is a diagram illustrating a manufacturing process of the motor according to the embodiment.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings used in the following description, for the sake of emphasis on characteristic portions, characteristic portions may be shown in an enlarged manner for convenience, and the dimensional ratios of the respective components are not necessarily the same as actual ones. Moreover, for the same purpose, portions that are not characteristic may be omitted from illustration.
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 perpendicular to the rotation axis a is simply referred to as "radial direction", and the direction around the rotation axis a is simply referred to as "circumferential direction". In the "axial direction", the upper side of fig. 1 is simply referred to as "upper side", and the lower side is simply referred to as "lower side". The vertical direction does not indicate a positional relationship and a direction when the device is assembled to an actual apparatus. In the present embodiment, the vertical direction is substantially the same direction as the "axial direction".
Fig. 1 is a sectional view of a motor 100 of 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 addition, in fig. 1, the bus bar unit 60 is schematically shown by a two-dot chain line.
[ case 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 an inner 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 portion 12 is disposed at the lower end portion of the cylindrical portion 11 and extends radially inward from the lower end portion of the cylindrical portion 11. The bottom portion 12 has a shaft through hole 12a and a bearing holding portion 12 b. The shaft through hole 12a is provided in the center of the bottom portion 12. The bearing holding portion 12b is provided around the shaft through hole 12 a.
[ rotor 20]
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 are held by the bearing holding portion 12b of the housing 10 and the bearing holding portion 50a of the bearing holder 50.
[ 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. 1 and 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 formed by laminating a plurality of electromagnetic steel plates in the axial direction. The plurality of stator cores 31 are arranged in a circumferential direction and each have a core back 31a and teeth 31 b. The plurality of core back portions 31a are cylindrical concentric with the rotation axis a. The teeth 31b extend radially inward from the inner surface of the core back 31 a. In the present embodiment, 12 teeth 31b are provided.
The insulator 32 is attached to each tooth 31b 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 insulating material 32 is made of an insulating material such as resin.
The coil 33 is formed by winding a conductive wire around the teeth 31b via the insulator 32. The coil 33 is formed of a coil corresponding to any one of the U-phase, V-phase, and W-phase, and is arranged in the circumferential direction in the order of the U-phase, V-phase, and W-phase. The number of coils 33 is 12, which is the same as the number of teeth 31 b.
As shown in fig. 2, the coil wires 34 extend from the respective coils 33 toward the axial upper side. The two coil wires 34, the first coil wire 34a and the second coil wire 34b, extend from the respective coils 33 toward the axially upper side. The first coil wire 34a is an end portion of a winding start end of the conductive wire, and the second coil wire 34b is an end portion of a winding end of the conductive wire. Therefore, the total of the coil wires 34 extending from the respective coils 33 is 24. In the present embodiment, the first coil wire 34a extends axially upward longer than the second coil wire 34 b. The coil wire 34 is a circular wire having a circular cross section. This can suppress the cost of the coil wire 34. Further, the coil wire 34 is easily guided by the guide portion 61d of the bus bar holder 61 described later. The second coil wire 34b is electrically connected to a plurality of neutral point bus bars, not shown.
[ bearing retainer 50]
The bearing holder 50 is made of an insulating material such as resin. The bearing holder 50 is annular and is housed in the housing 10 above the stator 30. The bearing holder 50 is fixed to the housing 10 so as not to move in the circumferential direction and the axial direction. The bearing holder 50 is disposed below the busbar unit 60. However, the bearing holder 50 may be disposed on the upper side of the busbar unit 60.
The bearing holder 50 has a bearing holding portion 50a that holds one of the pair of bearings 40, and a plurality of through holes 50b through which the first coil wire 34a vertically penetrates. The passage holes 50b are provided at positions overlapping the first coil wires 34a in a plan view, and one passage hole 50b passes through one first coil wire 34 a.
The bearing holder 50 may be formed of a metallic material. In this case, it is necessary to prevent a short circuit due to contact between the bearing holder 50 and the first coil wire 34a by performing an insulation process on the bearing holder 50 or coating the first coil wire 34a with an insulating member except for a connection portion with the bus bars 63 to 68 described later.
[ busbar unit 60]
As shown in fig. 1, the bus bar unit 60 is disposed above the bearing holder 50. Fig. 3 is a perspective view of the bus bar unit 60. Fig. 4 is a perspective view of a plurality of bus bars 63 to 68 arranged in the bus bar unit 60. As shown in fig. 3 and 4, 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.
[ bus bar holder 61]
The bus bar holder 61 is molded from an 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 inside the bus bar holder 61 except for a part thereof. The bus bar holder 61 has a shaft through hole 61a, a plurality of through holes 61b, and a plurality of terminal holding portions 61 c.
The shaft through hole 61a and the plurality of through holes 61b penetrate the bus bar holder 61 in the axial direction. The shaft through hole 61a is provided in the center of the bus bar holder 61, and the shaft 21 penetrates therethrough.
The plurality of passage holes 61b are located radially outward of the shaft passage hole 61a and are provided at intervals in the circumferential direction. The plurality of passage holes 61b each pass through one first coil wire 34a drawn out from each coil 33. Therefore, the number of the passage holes 61b in the present embodiment is 12, which is the same as the number of the first coil wires 34 a. In fig. 3, through holes 61b in which first and second connecting portions 63a and 63b of a bus bar 63 described later are arranged are denoted by reference numerals, and the other through holes are not denoted by reference numerals.
The plurality of terminal holding portions 61c are provided radially outward of the plurality of passage holes 61 b. Here, the plurality of terminal holding portions 61c are provided three at intervals of 120 degrees in the circumferential direction.
[ terminal 62]
The terminals 62 are 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 held by the terminal holding portion 61c, respectively. The terminals 62 are connected to the corresponding bus bars 63 to 68 of each terminal 62.
[ bus bars 63 to 68]
As shown in fig. 4, the bus bars 63 to 68 are plate-shaped members formed of a conductive metal material. As described above, the bus bars 63 to 68 are molded in the bus bar holder 61 except for a part thereof so that the bus bars 63 to 68 do not contact each other in a state of crossing each other. This prevents short-circuiting due to contact between the bus bars 63 to 68 and other members.
The bus bars 63 to 68 electrically connect the two first coil wires 34a of the coil wires 34 to the terminals 62, respectively. The bus bars 63 to 68 correspond to any one of the U-phase, the V-phase, and the W-phase, and two bus bars are provided for each corresponding bus bar. In the present embodiment, the bus bars 66, 67 correspond to U, the bus bars 64, 65 correspond to V, and the bus bars 63, 68 correspond to W.
The bus bars 63 to 68 include bus bars having different shapes from each other. Hereinafter, the bus bar 63 will be described as an example of the shape of the bus bars 63 to 68. As shown in fig. 4, the bus bar 63 has a first connecting portion 63a, a second connecting portion 63b, a first extending portion 63c, a second extending portion 63d, and a terminal insertion hole 63 e.
Fig. 5 is a diagram schematically showing a part of a cross section of the bus bar unit 60. Specifically, the drawings schematically show a cross section of the first connecting portion 63a when the bus bar 63 is molded in the bus bar holder 61. As shown in fig. 4 and 5, the first connection portion 63a includes a base portion 63f, a through portion 63g, and a pressure-bonding portion 63 h. The base 63f has a plate shape, and the plate thickness direction thereof is the same as the vertical direction. In the present embodiment, the bus bar 63 has a plate shape except for the base portion 63f, but the bus bar 63 does not necessarily have to have a plate shape.
The penetrating portion 63g is a circular hole and penetrates the base portion 63f in the up-down direction. The through portion 63g is disposed at a position overlapping the passage hole 61b in a 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 through portion 63 g. This enables the first coil wire 34a to be reliably positioned. The through-hole 63g may have a non-circular shape such as a square shape. Instead of the hole, for example, a U-shaped opening may be provided. That is, the through portion 63g may have a shape that allows the coil wire 34 to pass through in the vertical direction.
The crimping part 63h is provided for joining the first coil wire 34a and the first connection part 63a of the bus bar 63. The pressure-bonding section 63h protrudes upward from at least a part of the outer peripheral portion of the through section 63 g. Specifically, as shown in fig. 5, the pressure-bonding section 63h protrudes upward from the passage hole 61b of the bus bar holder 61. In the present embodiment, the pressure-bonding section 63h is provided so as to protrude upward from the entire outer peripheral portion of the through section 63g, for example, by burring (burring).
As shown in fig. 3 and 4, the second connection portion 63b has the same shape as the first connection portion 63 a. The second connection portion 63b is connected to the other first coil wire 34a different from the first coil wire 34a to which the first connection portion 63a is connected. The second connection portion 63b is disposed at a position overlapping another 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 a plan view. The first extension 63c connects the first connection 63a and the second connection 63 b. The second extension portion 63d connects the first connection portion 63a and the terminal insertion hole 63 e. The second extension 63d extends in a direction different from the first extension 63c, and is at least partially bent. The first extension portion 63c and the second extension portion 63d are molded in the bus bar holder 61.
The terminal insertion hole 63e is a through hole penetrating in the axial direction. The terminal insertion hole 63e is inserted with a part of the terminal 62 as shown in fig. 3, whereby the terminal 62 is connected with the bus bar 63.
The bus bars 65 and 67 have the same shape as the bus bar 63. Also, as shown in fig. 4, the bus bar 64 has a first connecting portion 64a, a second connecting portion 64b, a first extending portion 64c, a second extending portion 64d, and a terminal insertion hole 64 e. 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 are the same in structure as the first connection portion 63a, the second connection portion 63b, the first extension portion 63c, and the terminal insertion hole 63e of the bus bar 63, respectively. The second extension portion 64d of the bus bar 64 connects the first extension portion 64c and the terminal insertion hole 64 e. Specifically, the second extending portion 64d extends radially outward from a position of the first extending portion 64c close to the first connecting portion 64a, and is at least partially bent. The bus bars 66 and 68 have the same shape as the bus bar 64.
[ guide part 61d ]
As shown in fig. 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 63 a. The guide portion 61d has a guide hole 61e extending in the vertical direction. The guide hole 61e is provided at a position overlapping the through portion 63g in a plan view. The guide hole 61e is provided at a position overlapping the passage hole 50b 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 toward the lower side. By providing the inclined portion 61f, even when the position of the first coil wire 34a is deviated, the first coil wire 34a can be easily drawn into the through portion 63 g. In the present embodiment, the guide portions 61d are provided at positions corresponding to all the passage holes 61b of the bus bar holder 61, but the guide portions 61d may not necessarily be provided at positions corresponding to all the passage holes 61 b.
As shown in fig. 5, when the pressure-bonding section 63h is pressure-bonded to the first coil wire 34a, the pressure-bonding teeth 70 arranged on the outer peripheral side of the pressure-bonding section 63h are moved in the arrow direction, and the pressure-bonding section 63h is pressure-bonded to the first coil wire 34 a. After the crimp part 63h is crimped with the first coil wire 34a, the crimp part 63h is fixed with the first coil wire 34a by laser welding or the like. Here, the pressure-bonding section 63h protrudes upward from the passage hole 61b of the bus bar holder 61. In other words, the bus bar holder 61 covers the lower side of the crimping portion 63 h. Therefore, it is not necessary to provide a space for the pressure contact teeth 70 to operate outside the base portion 63f of the bus bar 63. Therefore, the connection of the bus bar 63 and the first coil wire 34a can be performed in a space-saving manner. Further, since the pressure-bonding section 63h is formed to protrude upward from the entire outer periphery of the through section 63g, the pressure-bonding section 63h can be pressure-bonded to the first coil wire 34a from any position of the outer periphery of the pressure-bonding section 63 h. This increases the degree of freedom in the arrangement of the crimping teeth 70.
The pressure-bonding section 63h may be provided by raising at least a part of the outer peripheral portion of the through section 63g in a tapered shape. The pressure-bonding section 63h may have any shape as long as it can pressure-bond the first coil wire 34a and the pressure-bonding section 63h via the pressure-bonding teeth 70 at a position above the passage hole 61b of the bus bar holder 61.
< modification 1 >
Fig. 6 is a diagram showing modification 1 of fig. 5. In fig. 6, the same elements as those of the embodiment are denoted by the same reference numerals, and the description thereof is omitted. In modification 1, a part of the crimping portion 63h is molded in the bus bar holder 161. In detail, the bus bar holder 161 covers the root of the crimping portion 63h from the outer peripheral side and from above. Thus, when the pressure-bonding section 63h and the first coil wire 34a are welded after being pressure-bonded, the pressure-bonding section 63h and the first coil wire 34a are melted to cover the upper side of the bus bar holder 161, and thus the bus bar 63 can be firmly fixed to the bus bar holder 161. As shown in fig. 6, the guide portion 161d may be formed such that the outer diameter thereof gradually increases from the upper side to the lower side.
< modification 2 >
Fig. 7 is a diagram showing modification 2 of fig. 5. In fig. 7, the same elements as those of the embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the example shown in fig. 7, the crimping portion 263h is constituted by a member different from the bus bar 263. That is, the base 63f or the through portion 63g is joined with another member, and a pressure-bonding section 263h is provided to protrude upward from at least a part of the outer peripheral portion of the through portion 63 g. In modification 2, the pressure-bonding section 263h and the guide section 261d of the bus bar holder 261 are arranged at positions overlapping in a plan view. In this case, the first coil wire 34a can be smoothly passed from the guide portion 261d to the pressure-bonding portion 263 h.
[ production method ]
Next, an example of a method for manufacturing the motor 100, particularly the bus bar unit 60, according to the present embodiment will be described with reference to fig. 8. Note that, since the manufacturing method of the motor 100 other than the bus bar unit 60 is the same as the conventional method, the description thereof is omitted.
In step S1, for example, a bus bar 63 formed by punching a metal plate by press working is prepared, and a through portion 63g penetrating in the vertical direction is formed in the base portion 63f of the connection portions 63a and 63b of the bus bar 63. The shape of the through portion 63g may be a circular hole, a U-shaped notch, or the like, as long as the coil wire 34 can pass through it. The base 63f of the connecting portions 63a and 63b of the bus bar 63 has a plate shape, and preferably has the same plate thickness direction as the vertical direction. In this case, the through portion 63g can be easily formed in the base portion 63 f.
In step S2, pressure-bonding section 63h is formed to protrude upward from at least a part of the outer peripheral portion of through-section 63 g. In the present embodiment, the pressure-bonding section 63h is formed to protrude upward from the entire outer periphery of the through section 63 g. The crimping portion 63h is formed by, for example, burring. Thus, the pressure-bonding section 63h can be formed inexpensively and easily. As described above, the pressure-bonding section 63h may have any shape that allows the pressure-bonding teeth 70 to be brought into pressure-bonding contact with the coil wire 34 at a position above the base 63f of the connection sections 63a and 63b of the bus bar 63.
In step S3, the bus bar 63 in which the pressure-bonding section 63h is 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, an insulating resin is filled in the mold, and the bus bar holder 61 and the bus bar 63 are integrally molded by resin molding. Thereby, the bus bar 63 is fixed to 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 to a predetermined position of the bus bar holder 61 molded by an insulating resin. In either case, the guide portion 61d for guiding the coil wire 34 to the through portion 63g is integrally formed with the bus bar holder 61. The guide portion 61d is provided below the connection portions 63a and 63b of the bus bar 63. Specifically, the guide portion 61d is provided at a position overlapping the through portion 63g in a plan view.
In step S4, coil wire 34 extending from coil 33 is inserted into through portion 63 g. 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 through portion 63g by the guide portion 61d, workability of passing the first coil wire 34a through the through portion 63g is improved.
In step S5, the first coil wire 34a inserted into the through-section 63g and the pressure-bonding section 63h are pressure-bonded. After the crimping part 63h and the first coil wire 34a are crimped, the crimping part 63h and the first coil wire 34a are fixed by laser welding or the like. Here, the pressure teeth 70 are moved above the bus bar holder 61, and the connection portions 63a and 63b of the bus bar 63 can be brought into pressure contact with the first coil wire 34 a. Therefore, it is not necessary to provide a space for the pressure tooth 70 to move outside in the width direction of the base portion 63f, and the bus bar 63 and the first coil wire 34a can be connected in a space-saving manner.
Further, since the pressure-bonding section 63h is formed to protrude upward from the entire outer periphery of the through section 63g, the pressure-bonding section 63h can be pressure-bonded to the first coil wire 34a from any position of the outer periphery of the pressure-bonding section 63 h. This increases the degree of freedom in the arrangement of the crimping teeth 70. Further, since there is no need for a space for the pressure contact teeth 70 to move outside the connecting portions 63a, 63b in the width direction, the guide portion 61d can be integrally formed with the bus bar holder 61 when the bus bar holder 61 is molded or when the bus bar holder 61 and the bus bar 63 are integrally formed by resin molding.
Specifically, in the conventional bus bar holder, it is necessary to provide a space for operating the pressure contact teeth 70 on the outer side in the width direction of the connecting portions 63a and 63b of the bus bar 63. Therefore, it is difficult to dispose the guide portion 61d of the bus bar holder 61 below the connection portions 63a, 63b of the bus bar 63. Even if the guide portion 61d can be provided, if a space for operating the pressure-bonding teeth 70 is secured in the inner peripheral portion of the guide portion 61d, the inner diameter of the guide portion 61d becomes large, and therefore it becomes difficult to guide the coil wire 34 to the through portion 63 g. However, in the case of the manufacturing method of the motor 100, the crimping teeth 70 can be operated above the bus bar holder 61 to crimp the coil wire 34 and the crimping section 63 h. Therefore, no space for operating the pressure-contact teeth 70 is required on the widthwise outer sides of the connecting portions 63a, 63b, and the guide portion 61d having a smaller inner diameter than the conventional one can be provided below the connecting portions 63a, 63b of the bus bar 63. Thereby, the coil wire 34 can be guided to the through portion 63g by the guide portion 61 d.
< other embodiments >
The present invention is not limited to the above embodiments, and the configurations and combinations thereof in the embodiments are examples, and additions, omissions, substitutions, and other changes in the configurations can be made without departing from the scope of the present invention.
In the above embodiment, the coil wire 34 is a circular wire having a circular cross section, but the coil wire 34 may be a square wire having a rectangular cross section. In this case, when the pressure-bonding section 63h is pressure-bonded to the coil wire 34, the contact area between the pressure-bonding section 63h and the coil wire 34 is increased, and therefore the connection sections 63a and 63b of the bus bar 63 and the first coil wire 34a can be firmly connected.
In the above embodiment, the bus bar holder 61 and the bus bar 63 are integrally molded by resin molding, but in the case where the bus bar holder 61 and the bus bar 63 are not integrally molded, the shape of the pressure-bonding section 63h may be any shape as long as the first coil wire 34a and the pressure-bonding section 63h can be pressure-bonded by the pressure-bonding teeth 70 at a position above the base section 63 f.
Claims (14)
1. A motor is characterized in that a motor is provided,
the motor includes:
a rotor having a rotation axis extending in an up-down direction;
a stator having a plurality of coils; and
a bus bar located above the stator and having a connection part electrically connected to the coil,
the connecting portion of the bus bar has:
a penetrating portion through which a coil wire extending from the coil penetrates in a vertical direction; and
and a pressure-bonding section that protrudes upward from at least a part of the outer peripheral section of the through section.
2. The motor of claim 1,
the motor further includes a bus bar holder that holds the bus bar,
the bus bar holder has a guide portion that is provided below the connection portion and guides the coil wire to the through portion of the connection portion.
3. The motor of claim 2,
the bus bar holder is molded from an insulating resin.
4. The motor of claim 2,
the bus bar holder is integrally formed with the bus bar by resin molding.
5. The motor of claim 2,
the pressure-bonding section and the guide section are arranged at positions overlapping in a plan view.
6. The motor of claim 2,
the bus bar holder covers below the crimping portion.
7. The motor of claim 2,
the guide portion has a guide hole extending in an up-down direction,
the guide hole has an inclined portion whose diameter gradually increases from above toward below.
8. The motor of claim 1,
the through part is a hole.
9. The motor of claim 8,
the pressure-bonding section protrudes upward from the entire outer peripheral portion of the through section.
10. The motor of claim 1,
the connecting part is plate-shaped, and the plate thickness direction is the same as the vertical direction.
11. The motor of claim 1,
the bus bar is plate-shaped.
12. The motor of claim 1,
the coil wire is a round wire having a circular cross section.
13. The motor of claim 1,
the coil wire is a square wire having a rectangular cross section.
14. The motor of claim 1,
the motor further comprises a housing for housing the rotor and the stator,
the rotor has a shaft rotatable about the axis of rotation,
the stator is disposed radially outward of the rotor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017188421 | 2017-09-28 | ||
| JP2017-188421 | 2017-09-28 | ||
| PCT/JP2018/034810 WO2019065450A1 (en) | 2017-09-28 | 2018-09-20 | Motor and method for manufacturing motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211791014U true CN211791014U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201890001093.1U Active CN211791014U (en) | 2017-09-28 | 2018-09-20 | Motor with a stator having a stator core |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN211791014U (en) |
| WO (1) | WO2019065450A1 (en) |
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| DE102021203954A1 (en) * | 2020-06-24 | 2021-12-30 | Robert Bosch Gesellschaft mit beschränkter Haftung | Stator of an electrical machine |
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| JP3836655B2 (en) * | 2000-02-09 | 2006-10-25 | 三菱電機株式会社 | Conductor welded structure |
| US20110018376A1 (en) * | 2008-03-13 | 2011-01-27 | Nidec Corporation | Busbar terminal, busbar unit, and motor |
| JP5991172B2 (en) * | 2012-06-07 | 2016-09-14 | 日立金属株式会社 | Manufacturing method of electric motor |
| JP6135982B2 (en) * | 2013-01-17 | 2017-05-31 | 日本電産株式会社 | motor |
| JP6338172B2 (en) * | 2014-01-29 | 2018-06-06 | 株式会社デンソー | Brushless motor |
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