Motors and drives

Abstract

The embodiment of the present application provides a motor and a drive device, wherein the motor includes a busbar assembly, the busbar assembly includes a resin busbar holder and a metal electrical connection terminal integrally formed on the busbar holder, the busbar holder has: an outer peripheral wall, a bearing support portion located radially inward of the outer peripheral wall, and a plurality of radial connection portions, the radial connection portion radially connects the outer peripheral wall and the bearing support portion, the plurality of radial connection portions include: a first radial connection portion integrally formed with at least a portion of the metal electrical connection terminal, and a second radial connection portion not formed with the metal electrical connection terminal, the circumferential dimension of the first radial connection portion being smaller than the circumferential dimension of the second radial connection portion. Through the embodiment of the present application, it is possible to take into account both the strength of the radial connection portion and the welding space of the metal electrical connection terminal of the busbar.

Description

Technical Field

[0001] The present application relates to the field of electromechanics, and in particular to a motor and a drive device. Background Art

[0002] Generally, the motor includes a bus bar holder for holding the bus bar. In some existing structures, the bus bar holder has an outer ring, an inner ring as a bearing support seat, and a plurality of resin ribs radially connecting the outer ring and the inner ring, and the plurality of ribs are arranged at intervals in the circumferential direction. The metal electrical connection terminal of the bus bar is led out from the outer ring of the bus bar holder and is located at a position where no rib is provided between the inner ring and the outer ring, thereby ensuring space for the metal electrical connection terminal and the wire to be welded.

[0003] In a motor having a busbar holder of such a structure, the motor rotor is arranged at the center of the busbar holder through a bearing, and the inner ring of the bearing support seat supports the bearing. Since the motor rotor needs to rotate stably, there are certain requirements for the structural strength of the inner ring of the bearing support seat, and since the rib supports the inner ring, the rib needs to have a sufficient size in the circumferential direction to ensure the structural strength, resulting in a reduction in the space for welding the metal electrical connection terminal and the wire. Therefore, it is impossible to take into account both the strength of the rib and the welding space of the metal electrical connection terminal.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention

[0005] In order to solve at least one of the above problems or similar problems, the embodiments of the present application provide a motor and a drive device that can take into account both the strength of the ribs and the welding space of the metal electrical connection terminals of the busbar.

[0006] According to a first aspect of an embodiment of the present application, a motor is provided, the motor comprising a bus bar assembly, the bus bar assembly comprising a resin bus bar holder and a metal electrical connection terminal integrally formed on the bus bar holder,

[0007] The busbar holder has:

[0008] Peripheral wall;

[0009] a bearing support portion located radially inward of the outer peripheral wall; and

[0010] a plurality of radial connection parts, the radial connection parts connecting the outer peripheral wall and the bearing support part in the radial direction,

[0011] The plurality of radial connection portions include:

[0012] a first radial connection portion integrally formed with at least a portion of the metal electrical connection terminal; and

[0013] a second radial connection portion without the metal electrical connection terminal formed thereon,

[0014] A circumferential dimension of the first radial connection portion is smaller than a circumferential dimension of the second radial connection portion.

[0015] In one or more embodiments, the metal electrical connection terminal is located on a side close to a power interface of the motor in the circumferential direction, and the first radial connection portion is located on a side close to the power interface in the circumferential direction.

[0016] In one or more embodiments, the metal electrical connection terminal comprises:

[0017] a first extending portion, which is embedded in the first radial connecting portion and is located radially outside the first radial connecting portion, the first extending portion extending along a first direction, and the first direction is parallel to an extending direction of the power interface; and

[0018] a second extension portion extending from a radially inner end of the first extension portion in a second direction, the second direction being at a predetermined angle to the first direction, the second extension portion being electrically connected to the coil lead wire,

[0019] The width of the first radial connecting portion at the first extending portion is greater than the width of other portions of the first radial connecting portion.

[0020] In one or more embodiments, the second radial connection portion is disposed at a side away from the power interface in the circumferential direction relative to the first radial connection portion, and the second radial connection portion is formed as a whole.

[0021] In one or more embodiments, the second radial connection portion is circumferentially arranged on a side away from the power interface relative to the first radial connection portion, there are multiple second radial connection portions, and the multiple second radial connection portions are circumferentially connected with each other in an axial direction.

[0022] In one or more embodiments, a supporting resin molded with a metal pin is provided on a wall portion on at least one side in the circumferential direction of a radially inner end portion of at least one of the second radial connecting portions.

[0023] In one or more embodiments, the first radial connection portion is provided with a through hole axially penetrating the resin portion of the first radial connection portion and the metal electrical connection terminal;

[0024] In one or more embodiments, the metal electrical connection terminal comprises:

[0025] a first extension portion, which is embedded in the first radial connection portion and located radially outside the first radial connection portion, the first extension portion extending along a first direction, and the first direction is parallel to an extension direction of a power interface of the motor; and

[0026] a third extending portion embedded in the resin portion of the first radial connecting portion and extending radially from a radially inner end portion of the first extending portion toward the inside of the motor;

[0027] The through hole is located in the third extending portion.

[0028] In one or more embodiments, the metal electrical connection terminal has a claw portion at a distal end thereof, the claw portion being electrically connected to the coil lead wire, and at least one circumferential side of the claw portion being the first radial connection portion.

[0029] According to a second aspect of an embodiment of the present application, a driving device is provided, wherein the driving device includes the motor described in the first aspect.

[0030] One of the beneficial effects of the embodiments of the present application is that the first radial connection portion integrally formed with a metal electrical connection terminal with high yield strength has a smaller circumferential dimension. While reducing the width of the first radial connection portion to improve the operating space of the metal electrical connection terminal for welding the bus bar, the strength of the first radial connection portion will not be reduced, and the strength of the first radial connection portion and the welding space of the metal electrical connection terminal of the bus bar can be taken into account.

[0031] With reference to the following description and accompanying drawings, the specific embodiments of the present application are disclosed in detail, indicating the way in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited in scope. Within the scope of the spirit and clauses of the appended claims, the embodiments of the present application include many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0033] Figure 1 is a schematic diagram of a motor according to an embodiment of the first aspect of the present application;

[0034] Figure 2 is a schematic diagram of a busbar holder according to an embodiment of the first aspect of the present application;

[0035] Figure 3 is another schematic diagram of the busbar holder according to the first aspect of the present application;

[0036] Figure 4 is another schematic diagram of the busbar holder of the embodiment of the first aspect of the present application;

[0037] Figure 5 yes Figure 4 An enlarged schematic diagram of part A;

[0038] Figure 6 This is another schematic diagram of the busbar retainer according to the first embodiment of the present application. DETAILED DESCRIPTION

[0039] With reference to the accompanying drawings, the above and other features of the present application will become apparent through the following description. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the attached claims.

[0040] In the embodiments of the present application, the term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "include", "comprises", "has", etc. refer to the existence of the stated features, elements, components or components, but do not exclude the existence or addition of one or more other features, elements, components or components.

[0041] In the embodiments of the present application, the singular forms "a", "the", etc. may include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0042] In addition, in the following description of this application, for the convenience of explanation, the direction extending along the central axis OO' of the motor or the direction parallel to it is called "axial"; the radial direction centered on the central axis OO' is called "radial", the direction close to the central axis OO' in the radial direction is called "radial inside" or "inside", the direction away from the central axis OO' in the radial direction is called "radial outside" or "outside", and the direction around the central axis OO' is called "circumferential". However, it is worth noting that these are only for the convenience of explanation and do not limit the orientation of the motor during use and manufacturing.

[0043] The implementation of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0044] Embodiments of the first aspect

[0045] An embodiment of a first aspect of the present application provides a motor.

[0046] Figure 1 It is a schematic diagram of a motor according to an embodiment of the first aspect of the present application, showing the situation observed when the motor is cut open along its rotation axis.

[0047] like Figure 1 As shown, the motor 100 includes a bus bar assembly 11, and the bus bar assembly 11 includes a resin bus bar holder 111 and a metal electrical connection terminal 1121 integrally formed with the bus bar holder 111 (see Figures 2 to 5 ).

[0048] like Figure 1 As shown, the busbar holder 111 has an outer peripheral wall 1111, a bearing support portion 1112 and a radial connection portion 1113. The bearing support portion 1112 is located radially inside the outer peripheral wall 1111, and there are multiple radial connection portions 1113, which radially connect the outer peripheral wall 1111 and the bearing support portion 1112. When viewed from the axial direction, the outer peripheral wall 1111 may be annular, but is not limited thereto, and the outer peripheral wall may also be in other shapes, such as a square or irregular shape, etc., and the present application does not limit this.

[0049] Figure 2 is a schematic diagram of a busbar holder according to an embodiment of the first aspect of the present application, showing a situation in which the busbar holder is viewed from one axial side; Figure 3 is another schematic diagram of the busbar holder of the first embodiment of the present application, showing the busbar holder viewed from the side. Figure 2 The case of the busbar holder.

[0050] like Figures 2 to 3 As shown, there are multiple radial connection parts 1113 (including 1113-1 and 1113-2) radially connecting the outer peripheral wall 1111 and the bearing support part 1112, including a first radial connection part 1113-1 integrally formed with at least a part of the metal electrical connection terminal 1121, and a second radial connection part 1113-2 without the metal electrical connection terminal 1121 formed thereon. The circumferential dimension w1 of the first radial connection part 1113-1 is smaller than the circumferential dimension w2 of the second radial connection part 1113-2. The fact that the metal electrical connection terminal 1121 is not formed means that the metal electrical connection terminal 1121 is not configured in the second radial connection part 1113-2. The circumferential dimension can be understood as the dimension in the direction perpendicular to the radial direction or the length of the arc along the circumferential direction.

[0051] It can be seen from the above embodiments of the present application that part of the radial connection parts (the first radial connection part 1113-1) among the multiple radial connection parts are integrally formed with the metal electrical connection terminal 1121 and have a smaller circumferential dimension. Since the metal electrical connection terminal 1121 has a larger yield strength than the resin, the first radial connection part 1113-1 integrally formed with the metal electrical connection terminal 1121 with a large yield strength has a smaller circumferential dimension w1. When the circumferential dimension of the first radial connection part 1113-1 is reduced to improve the operating space of the metal electrical connection terminal 1121 for welding the bus bar, the strength of the first radial connection part 1113-1 will not be reduced, and the strength of the first radial connection part 1113-1 and the welding space of the metal electrical connection terminal 1121 of the bus bar can be taken into account.

[0052] In the embodiment of the present application, the motor 100 may be of various types. In addition, in addition to the bus bar assembly 11, the motor 100 may also include other components, such as Figure 1 As shown, the motor 100 may also include a rotating shaft 12 rotating about the central axis OO', a rotor 13 rotating together with the rotating shaft 12, a stator 14 arranged radially opposite to the rotor 13, a bearing 15 supporting the rotating shaft 12, and a power interface 16 (such as Figures 2 to 6 ), the bearing support portion 1112 supports the bearing 15, the stator 14 includes a stator core and a winding 141 wound around the stator core, the end portion of the winding 141 can be led out from the O side of the coil formed by the winding 141, and the led end portion of the wire (also referred to as the coil lead wire) is electrically connected to the metal electrical connection terminal 1121 of the bus bar. It is worth noting that with respect to other components of the motor 100, Figure 1 The above diagrams are merely exemplary, and the above descriptions are also merely exemplary. Please refer to the relevant technologies.

[0053] In the embodiment of the present application, the bus bar 112 (see Figure 4 ) is injected with resin to integrally form the busbar assembly 11, and the number of busbars 112 may be multiple. In such a busbar assembly 11, for any busbar 112, one end P (see Figure 4) can be exposed from the busbar holder 111, and the exposed end of the busbar 112 can be used as a metal electrical connection terminal 1121 of the busbar 112 that is electrically connected to the coil lead wire, for example, the electrical connection between the coil lead wire and the metal electrical connection terminal 1121 is achieved by welding, and a portion of the busbar 112 can be buried in one of the radial connection parts (the first radial connection part 1113-1) to strengthen the strength of the radial connection part, thereby reducing the circumferential size of the radial connection part, and the rest of the busbar can be buried in the outer peripheral wall 1111 of the busbar holder, the power interface 16, etc. It is worth noting that not all busbars must include a portion buried in the first radial connection part 1113-1, for example, Figure 2 As shown, the busbar corresponding to the metal electrical connection terminal 1121 in the middle position among the three metal electrical connection terminals 1121 does not have a portion embedded in the first radial connection portion 1113-1, and this application does not limit this. It is worth noting that the busbar 112 embedded in the busbar holder 111 in this application can be understood as at least a portion of the busbar 112 being integrally formed inside the busbar holder 111 by resin casting, or at least a portion of the busbar 112 being configured inside the busbar holder 111 by insertion fit, interference fit, etc.

[0054] In the embodiment of the present application, the number of the first radial connection parts 1113-1 can be any number, such as Figure 2 As shown, there are 2, but it is not limited to this, and can also be 1 or 3, and this application does not impose any limitation on this.

[0055] In the embodiment of the present application, the circumferential dimension w1 of the first radial connection portion 1113-1 is smaller than the circumferential dimension w2 of the second radial connection portion 1113-2. For example, the circumferential dimension of the first radial connection portion 1113-1 at any radial position is smaller than the circumferential dimension of the second radial connection portion 1113-2 at any radial position, that is, the maximum value of the circumferential dimension of the first radial connection portion 1113-1 at each radial position is smaller than the minimum value of the circumferential dimension of the second radial connection portion 1113-2 at each radial position, but is not limited to this. It can also be that the circumferential dimension of the first radial connection portion 1113-1 at any radial position is smaller than the circumferential dimension of the second radial connection portion 1113-2 at each radial position. The circumferential dimensions of the first radial connection part 1113-1 at the corresponding radial position are smaller than the circumferential dimensions of the second radial connection part 1113-2, or the circumferential dimensions of the first radial connection part 1113-1 at at least part of the radial position are smaller than the circumferential dimensions of the second radial connection part 1113-2. For example, the circumferential dimensions of the first radial connection part 1113-1 at part of the radial position are smaller than the circumferential dimensions of the second radial connection part 1113-2 at the corresponding radial position. For example, the circumferential dimensions of the first radial connection part 1113-1 at the position close to the bearing support part 1112 are smaller than the circumferential dimensions of the second radial connection part 1113-2 at the position close to the bearing support part 1112. The above methods are just examples, as long as the circumferential dimensions of the first radial connection part 1113-1 can be reduced at a suitable position to ensure space for welding operations.

[0056] like Figures 2 to 3 As shown, in one or more embodiments, the metal electrical connection terminal 1121 is located on a side close to the power interface 16 of the motor 100 in the circumferential direction, and the first radial connection portion 1113-1 is located on a side close to the power interface 16 in the circumferential direction. As a result, the length of the metal electrical connection terminal 1121 can be saved, that is, the length of the bus bar 112 can be saved, and the cost can be saved. However, the present application is not limited to this, and the metal electrical connection terminal 1121 can be set at any position in the circumferential direction, and the present application does not limit this.

[0057] like Figures 2 to 3 As shown, in one or more embodiments, the second radial connection portion 1113-2 is circumferentially arranged at a side away from the power interface 16 relative to the first radial connection portion 1113-1, and there are multiple second radial connection portions 1113-2, and the circumferential direction of the multiple second radial connection portions 1113-2 is an axially through structure. This is more conducive to heat dissipation, and can also reduce the amount of resin used and reduce costs.

[0058] Figure 4 Another schematic diagram of the bus bar holder of the first embodiment of the present application shows the bus bar in the bus bar holder in a perspective manner. Figure 5 yes Figure 4 An enlarged schematic diagram of a portion A of the bus bar is shown.

[0059] like Figures 4 to 5 As shown, the metal electrical connection terminal 1121 includes a first extension portion 11211 and a second extension portion 11212. The first extension portion 11211 is embedded in the first radial connection portion 1113-1 and is located on the radially outer side of the first radial connection portion 1113-1. The first extension portion 11211 extends along a first direction P1, and the first direction P1 is parallel to the extension direction P0 of the power interface 16; the second extension portion 11212 extends from the radial inner end portion of the first extension portion 11211 along a second direction P2, and the second direction P2 is at a predetermined angle n with the first direction P1. The second extension portion 11212 is electrically connected to the coil lead wire, and the width w3 of the first radial connection portion 1113-1 at the widest point at the first extension portion 11211 is greater than the width of other parts of the first radial connection portion 1113-1.

[0060] For the radially extending first radial connection portion 1113-1, the first radial connection portion 1113-1 needs to have a larger circumferential dimension at the first extension portion 11211 so as to bury the first extension portion 11211 inside it. Thus, the first radial connection portion 1113-1 has a larger circumferential dimension at the first extension portion 11211, which can reliably increase the strength of the first radial connection portion 1113-1 and reliably support the metal electrical connection terminal 1121. The extension direction P2 of the second extension portion 11212 and the extension direction P1 of the first extension portion 11211 buried in the first radial connection portion 1113-1 form a predetermined angle n, so that the second extension portion 11212 deviates from the first radial connection portion 1113 and extends, thereby ensuring space for welding operations. The present application does not limit the predetermined angle n, and the angle n can be an acute angle, a right angle, or an obtuse angle. For example, the extension direction P2 can be at the predetermined angle n with the extension direction P1 so that the extension direction P2 and the radial direction of the first radial connection portion 1113-1 are at a right angle or approximately a right angle. The second extension portion 11212 extends toward the outside of the busbar retainer 111, thereby ensuring space for welding operations.

[0061] like Figures 4 to 5 As shown, in one or more embodiments, the first radial connection portion 1113-1 is provided with a through hole h axially penetrating the resin portion of the first radial connection portion 1113-1 and the metal electrical connection terminal 1121, that is, the through hole h axially penetrates the resin portion of the first radial connection portion 1113-1 and the metal electrical connection terminal 1121. Thus, the positioning of the bus bar holder when the bus bar and the resin holder are integrally formed can be achieved through the through hole h.

[0062] like Figures 4 to 5As shown, in one or more embodiments, the metal electrical connection terminal 1121 includes a first extension portion 11211 and a third extension portion 11213, the third extension portion 11213 is buried in the resin portion of the first radial connection portion 1113-1 and extends radially toward the inside of the motor from the radial inner end of the first extension portion 11211, and the through hole h is located in the third extension portion 11213, that is, the through hole h axially penetrates the resin portion of the first radial connection portion 1113-1 and the third extension portion 11213.

[0063] In the embodiment of the present application, the metal electrical connection terminal 1121 includes a third extension portion 11213 extending radially along the first radial connection portion 1113-1 within the first radial connection portion 1113-1, which can further enhance the strength of the busbar and ensure the structural strength of the first radial connection portion. In addition, a through hole h is formed in the third extension portion 11213, and the through hole h is not arranged on the main current path formed by the first extension portion 11211 and the second extension portion 11212. The through hole h can be used to realize the positioning of the busbar retainer when the busbar and the resin retainer are integrally molded, and it will not affect the current intensity and the working performance of the motor.

[0064] Figure 6 is another schematic diagram of the busbar holder of the first embodiment of the present application. Figures 2 to 4 The difference between the examples is that in Figures 2 to 4 In the example, the plurality of second radial connection portions 1113-2 circumferentially away from the power interface 16 are axially through structures in the circumferential direction; Figure 6 In the example, the second radial connection portion 1113-2 is circumferentially arranged on a side away from the power interface 16 relative to the first radial connection portion 1113-1, and the second radial connection portion 1113-2 is formed as a whole. Thus, the second radial connection portion 1113-2 is formed as an integrated unit on the opposite side of the first radial connection portion 1113-1, which can ensure the strength of the bearing support portion 1112.

[0065] The number of the second radial connection parts 1113-2 and the corresponding arrangement are described above by way of example, but the present application is not limited thereto. The number of the second radial connection parts 1113-2 may also be 2, 4, or more than 4. The number of the second radial connection parts 1113-2 may be selected based on, for example, the required strength of the second radial connection parts that is compatible with the motor speed / rpm. For example, when the motor speed is 4200 rpm, Figure 2 The structure shown has three second radial connection parts 1113 - 2 , and two first radial connection parts 1113 - 1 may also be provided.

[0066] In one or more embodiments, a supporting resin having a metal pin formed therein is provided on a wall portion of at least one side of the radial inner end portion of at least one second radial connection portion in the circumferential direction. Thus, stress can be dispersed by the supporting resin, for example, when a resin retainer is pressed into the motor housing for assembly and / or when components such as bearings and circuit boards are pressed into the resin retainer for assembly, stress can be dispersed by the supporting resin to prevent the bearing support portion 1112 from being damaged by the pressing operation.

[0067] For example, Figures 2 to 4 As shown, for the busbar retainer 111 having three second radial connection parts 1113-2, a supporting resin 113 can be set on the wall portion on the circumferential side of the radial inner end portion of any two of the second radial connection parts 1113-2, but is not limited to this. For example, the supporting resin 113 can also be set on the wall portion on the circumferential side of the radial inner end portion of one or all three second radial connection parts 1113-2. In addition, for any second radial connection part 1113-2, a supporting resin 113 can be set on the wall portion on the circumferential side or both sides of the radial inner end portion thereof.

[0068] For example, Figure 6 As shown, for a busbar retainer 111 having a second radial connection portion 1113-2, that is, the second radial connection portion 1113-2 is formed as a whole, a supporting resin 113 can be provided at any position of the radial inner end portion of the second radial connection portion 1113-2, such as a position close to the axial center, or a plurality of supporting resins 113 can be provided at a plurality of positions arranged circumferentially at the radial inner end portion of the second radial connection portion 1113-2. In addition, the supporting resin 113 can also be provided on the wall portion on at least one circumferential side of the radial inner end portion of the second radial connection portion 1113-2.

[0069] Above through Figures 2 to 4 as well as Figure 6 The arrangement of the supporting resin 113 is exemplarily described. When the number of the second radial connection portions 1113 - 2 is 2, 4 or more than 4, the supporting resin 113 may be arranged in a similar manner with reference to the above description.

[0070] In the embodiments of the present application, Figure 3 As shown, the axial height of the supporting resin 113 can be greater than the axial height of the second radial connecting portion 1113-2, so that the stress can be reliably dispersed to prevent the bearing supporting portion from being damaged when pressed in. In addition, the supporting resin 113 can be connected to the bearing supporting portion 1112, which can expand the contact area between the bearing supporting portion 1112 and other components (the second radial connecting portion 1113-2, the bearing supporting portion 1112) and improve the strength of the overall structure.

[0071] In the embodiments of the present application, Figure 3 and Figure 4 As shown, the second radial connection portion 1113-2 may also be provided with a protrusion 114 formed by partially protruding along the axial direction, and the number of the protrusions 114 may be any number, such as 1, 2, 3 or more than 3, depending on the actual situation. During the press-in operation, the protrusions 114 can further disperse the stress to prevent the press-in from damaging the bearing support portion.

[0072] like Figures 2 to 6 As shown, in one or more embodiments, the end of the metal electrical connection terminal 1121 has a claw portion 11214, and the claw portion 11214 is electrically connected to the coil lead wire, that is, the end is an end close to the coil lead wire, and at least one circumferential side of the claw portion 11214 is a first radial connection portion 1113-1, that is, at least one of the two radial connection portions 1113 closest to the claw portion 11214 located on both circumferential sides of the claw portion 11214 is a first radial connection portion 1113-1. As a result, at least one circumferential side of the claw portion 11214 electrically connected to the coil lead wire is a first radial connection portion 1113-1 with a smaller width, which can improve the operating space of the welding busbar.

[0073] like Figure 2 As shown, in one or some embodiments, the first radial connection portion 1113 - 1 and / or the second radial connection portion 1113 - 2 may form a recessed portion 115 that is recessed along the axial direction, thereby saving materials and further reducing costs.

[0074] The motor of the embodiment of the present application is described above from different perspectives through different embodiments. The above embodiments can be combined arbitrarily, and the description is omitted here. In addition, the above is only an exemplary description of the present application, but the present application is not limited to this, and appropriate modifications can be made on the basis of the above embodiments. In addition, the motor can also include other components, such as a housing, etc., which can refer to the relevant technology, and the description is omitted here.

[0075] According to the above-mentioned embodiments of the present application, the first radial connection portion 1113-1 integrally formed with the metal electrical connection terminal 1121 with high yield strength has a smaller circumferential dimension. When the circumferential dimension of the first radial connection portion 1113-1 is reduced to improve the operating space of the metal electrical connection terminal 1121 of the welding bus bar, the strength of the first radial connection portion 1113-1 will not be reduced, and the strength of the first radial connection portion 1113-1 and the welding space of the metal electrical connection terminal 1121 of the bus bar can be taken into account.

[0076] Embodiments of the second aspect

[0077] The second embodiment of the present application provides a driving device having the motor 100 described in the first embodiment. Since the structure of the motor 100 has been described in detail in the first embodiment, its content is incorporated here and the description is omitted here.

[0078] In the embodiment of the present application, the driving device can be any device or equipment using the motor 100, including various household appliances, office automation equipment, industrial equipment, vehicle-mounted devices or components in various equipment, etc., such as a dual-clutch transmission component using the motor 100, etc.

[0079] According to an embodiment of the present application, in a driving device of a motor including an embodiment of the first aspect, a first radial connection portion integrally formed with a metal electrical connection terminal with high yield strength has a smaller circumferential dimension. While reducing the width of the first radial connection portion to improve the operating space of the metal electrical connection terminal for welding the bus bar, the strength of the first radial connection portion will not be reduced. The strength of the first radial connection portion and the welding space of the metal electrical connection terminal of the bus bar can be taken into account, thereby improving the performance of the motor.

[0080] The present application is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on the spirit and principles of the present application, and these modifications and variations are also within the scope of the present application.

[0081] The preferred embodiments of the present application are described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear from this detailed description, and therefore the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. In addition, since many modifications and changes are easily conceivable to those skilled in the art, the embodiments of the present application are not intended to be limited to the precise structures and operations illustrated and described, but all suitable modifications and equivalents that fall within their scope may be covered.

Claims

1. A motor, comprising a bus bar assembly, wherein the bus bar assembly comprises a resin bus bar holder and a metal electrical connection terminal integrally formed with the bus bar holder, The busbar holder has: Peripheral wall; a bearing support portion located radially inward of the outer peripheral wall; and a plurality of radial connection parts, the radial connection parts connecting the outer peripheral wall and the bearing support part in the radial direction, It is characterized in that The plurality of radial connection portions include: a first radial connection portion integrally formed with at least a portion of the metal electrical connection terminal; and a second radial connection portion without the metal electrical connection terminal formed thereon, A circumferential dimension of the first radial connection portion is smaller than a circumferential dimension of the second radial connection portion.

2. The motor according to claim 1, characterized in that The metal electrical connection terminal is located on a side close to a power interface of the motor in the circumferential direction, and the first radial connection portion is located on a side close to the power interface in the circumferential direction.

3. The motor according to claim 2, characterized in that The metal electrical connection terminal comprises: a first extending portion, which is embedded in the first radial connecting portion and is located radially outside the first radial connecting portion, the first extending portion extending along a first direction, and the first direction is parallel to an extending direction of the power interface; and a second extension portion extending from a radially inner end of the first extension portion in a second direction, the second direction being at a predetermined angle to the first direction, the second extension portion being electrically connected to the coil lead wire, The width of the first radial connecting portion at the first extending portion is greater than the width of other portions of the first radial connecting portion.

4. The motor according to claim 2, characterized in that The second radial connection portion is arranged at a side away from the power interface in the circumferential direction relative to the first radial connection portion, and the second radial connection portion is formed as a whole.

5. The motor according to claim 2, characterized in that: The second radial connection portion is arranged on a side away from the power interface in the circumferential direction relative to the first radial connection portion. There are multiple second radial connection portions, and the multiple second radial connection portions are axially connected in the circumferential direction.

6. The motor according to claim 5, characterized in that A supporting resin having a metal pin molded therein is provided on a wall portion on at least one side in the circumferential direction of a radially inner end portion of at least one of the second radial connecting portions.

7. The motor according to claim 1, characterized in that The first radial connection portion is provided with a through hole that axially penetrates the resin portion of the first radial connection portion and the metal electrical connection terminal.

8. The motor according to claim 7, characterized in that The metal electrical connection terminal comprises: a first extension portion, which is embedded in the first radial connection portion and located radially outside the first radial connection portion, the first extension portion extending along a first direction, and the first direction is parallel to an extension direction of a power interface of the motor; and a third extending portion embedded in the resin portion of the first radial connecting portion and extending radially from a radially inner end portion of the first extending portion toward the inside of the motor; The through hole is located in the third extending portion.

9. The motor according to claim 1, characterized in that The metal electrical connection terminal has a claw portion at a distal end thereof. The claw portion is electrically connected to the coil lead wire, and at least one circumferential side of the claw portion is the first radial connection portion.

10. A driving device, characterized in that: The drive device comprises a motor as claimed in any one of claims 1 to 9 .

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