Busbar and electric drive
By designing a busbar with an annular structure and using the structure of through-holes and busbar conductors, the problem of unreliable connection of existing electric driver busbars in vibrating environments is solved, and a higher electrical connection reliability is achieved.
Patent Information
- Application Number
- CN202421798440.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-26
AI Technical Summary
When the busbars in existing electrical drives are subject to large axial vibration or axial forces, the welding connection is prone to breaking or failure, resulting in unreliable electrical connections.
A busbar with an annular structure is designed, which includes a through hole extending in the axial direction and a busbar conductor is provided inside the body. The first end of the conductor extends out of the through hole and is connected to the stator winding wire by welding to form a more reliable electrical connection.
Through this design, the reliability of electrical connections is improved, especially in vibrating environments, which reduces the risk of connection failure and significantly improves the reliability of the motor in vehicle-mounted working conditions.
Smart Images
Figure CN222868643U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of motor structures. More specifically, the present application relates to a busbar, which is intended to provide a more reliable electrical connection. The present application also relates to an electric drive, which includes the above-mentioned busbar. Background Art
[0002] The stator of an electric drive usually includes a busbar, and the wires of the stator winding can extend outside the stator and be connected to the wires in the busbar. The wires of the stator winding are usually arranged at the periphery of the busbar and connected to the wires in the busbar by welding. Such welded connections are usually unreliable when subjected to large axial vibrations or axial forces, and are prone to breakage or failure. Therefore, there is a continuous pursuit of improved electrical connection solutions in the art. Summary of the invention
[0003] One aspect of the present application is to provide a busbar, which can improve the reliability of electrical connection. Another aspect of the present application is to provide an electric drive, which includes the above busbar.
[0004] The purpose of this application is achieved through the following technical solutions:
[0005] A busbar, comprising:
[0006] a body configured to have an annular structure extending around an axial direction and including one or more through holes, wherein the through holes extend along the axial direction and penetrate the body;
[0007] One or more busbar conductors, the busbar conductors are disposed inside the body, and a first end of the busbar conductors extends out of the through hole;
[0008] The through hole is dimensioned to receive the first end of the busbar conductor and has a reserved space between the inner wall of the through hole and the first end.
[0009] In the above busbar, optionally, the through hole is spaced apart from the inner edge and the outer edge of the body.
[0010] In the above busbar, optionally, the plurality of through holes are distributed on the body along the circumferential direction, and the plurality of through holes are evenly or non-evenly distributed along the circumferential direction.
[0011] In the above busbar, optionally, the first end of the busbar conductor extends along the axial direction.
[0012] In the above busbar, optionally, the first end of the busbar conductor is arranged close to one side of the through hole and extends to the outside of the body along the axial direction.
[0013] In the above-described busbar, the remaining space can optionally be dimensioned for accommodating stator winding wires of a stator winding of an electric drive.
[0014] An electric drive comprising:
[0015] A rotor that pivots with the axial direction as the rotation axis;
[0016] A stator, comprising a stator winding, from which a plurality of stator winding wires are led; and
[0017] The busbar is arranged at one side of the stator;
[0018] Each stator winding wire corresponds to each through hole and extends through the through hole in the axial direction; and each stator winding wire establishes electrical connection with each busbar conductor.
[0019] In the above electric drive, optionally, the stator winding wires and the busbar conductors are connected together by welding, and an electrical connection is established.
[0020] In the above electric drive, optionally, the end of the stator winding wire and the first end of the busbar conductor are connected together through a welding point.
[0021] In the above electric drive, optionally, the stator winding wires, the busbar conductors and the through holes have a cross section of one of the following shapes: rectangular, rounded rectangular, elliptical, circular, triangular, trapezoidal or a combination thereof. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments. Those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are intended only to conceptually represent the composition or structure of the described objects and may contain exaggerated displays. The drawings are not necessarily drawn to scale.
[0023] Figure 1 is a cross-sectional view of an embodiment of the electric drive of the present application.
[0024] Figure 2 yes Figure 1 A partial enlarged view of part B1.
[0025] Figure 3 It is a front view of an embodiment of the busbar of the present application.
[0026] Figure 4 yes Figure 3 A partial enlarged view of part B2. DETAILED DESCRIPTION
[0027] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present application.
[0028] First, it should be noted that the top, bottom, upward, downward, and other directional terms mentioned in this article are defined relative to the directions in the various drawings. These directions are relative concepts and will therefore vary depending on the position and state they are in. Therefore, these or other directional terms should not be understood as restrictive.
[0029] In addition, it should be pointed out that for any single technical feature described or implied in the embodiments of this document or any single technical feature shown or implied in the accompanying drawings, these technical features (or their equivalents) can be further combined to obtain other embodiments not directly mentioned in this document.
[0030] It should be noted that in different drawings, the same reference numerals denote the same or substantially the same components.
[0031] Figure 1 and Figure 2 An embodiment of the electric drive of the present application is shown. As shown in the figure, the electric drive 1 may include: a rotor 10, a stator 20, a busbar 30, a housing 40, a shaft 50, etc. In one embodiment, the shaft 50 may extend substantially in the axial direction AA. The rotor 10 may be sleeved on the shaft 50 and fixed relative to the shaft 50 so that the rotor 50 may rotate with the axial direction AA as the central axis. The busbar 30 may be mounted at one end of the stator 20, and the stator 20 may be attached to the inner wall of the housing 40. In one embodiment, the rotor 10, the stator 20, the busbar 30 and the shaft 50 may be mounted inside the housing 40. The rotor 10 may be positioned adjacent to the stator 20. The stator 20 may include a stator winding 21, and the stator winding 21 may include one or more windings, and each winding includes one or more stator winding wires 211. In one embodiment, the stator winding wire 211 may extend out of the stator winding 21 generally in the axial direction AA and may extend through the busbar 30. In one embodiment, the busbar 30 may be provided at one end of the stator 20 in the axial direction AA.
[0032] The busbar 30 may include one or more busbar conductors 200 inside, and the first end of the busbar conductor 200 may extend outside the busbar 30. In one embodiment, the first end of the busbar conductor 200 and the stator winding wire 211 may both extend substantially in the axial direction AA, and the first end of the busbar conductor 200 and the stator winding wire 211 are connected together by welding, and an electrical connection is established. In one embodiment, the welding connection point is located outside the busbar 30, and the welding connection point may be located at the end of the busbar conductor 200 and the stator winding wire 211. In one embodiment, at least a portion of the busbar conductor 200 and the stator winding wire 211 may be arranged parallel to each other.
[0033] Figure 3 and Figure 4 An embodiment of the busbar 30 of the present application is shown. Figure 3 As shown, the busbar 30 may extend along the circumferential direction CC with the axial direction AA as the axis. Figure 3 In the figure, the axial direction AA may be a direction perpendicular to the paper, and the circumferential direction CC may be a direction pointed by the outline of a circle on a plane perpendicular to the axial direction AA with the intersection of the axial direction AA and the plane as the center. In addition, the present application also defines a radial direction RR. As shown in the figure, the radial direction RR may be a direction pointed by a ray emitted from the intersection of the axial direction AA and the plane in a plane perpendicular to the axial direction AA.
[0034] The busbar 30 may include a body 100 and one or more busbar conductors 200. The body 100 may be an integrally formed annular structure, for example, formed by plastic molding. The busbar conductor 200 may be molded inside the body 100, and one end of the busbar conductor 200 may extend outside the body 100. The body 100 may include one or more through holes 110, each of which may extend along the axial direction AA and pass through the body 100. In one embodiment, one end of the busbar conductor 200 may extend from the inner wall of the through hole 110, and then turn in the axial direction AA, and further extend to the outside of the body 100. Figure 3 As shown, the body 100 may have an inner edge 101 and an outer edge 102 in a radial direction, and each through hole 110 may be located inside the body 100 and spaced apart from the inner edge 101 and the outer edge 102 .
[0035] A plurality of through holes 110 may be distributed on the body 100 along the circumferential direction CC, and may be evenly or unevenly distributed. The cross-sectional dimensions of the through holes 110 on the radial plane may be configured to be sufficient to accommodate both one end of the busbar conductor 200 and the stator winding wire 211. In one embodiment, one end of the busbar conductor 200 may be positioned at one side of the through hole 110, and the cross-sectional area of the other side of the through hole 110 may be configured to be sufficient to allow the stator winding wire 211 to pass therethrough. In one embodiment, the cross-sectional area of the other side of the through hole 110 is referred to as a reserved space.
[0036] In one embodiment, the stator winding wire 211 and the busbar conductor 200 may have a cross-section of one of the following shapes: rectangle, rounded rectangle, oval, circle, triangle, trapezoid, a combination of the above shapes, etc. In one embodiment, the through hole 110 may have a cross-section of one of the following shapes: rectangle, rounded rectangle, oval, circle, triangle, trapezoid, a combination of the above shapes, etc.
[0037] In one embodiment, both the stator winding wire 211 and the busbar conductor 200 are accommodated in the through hole 110, so that the positions of the stator winding wire 211 and the busbar conductor 200 are relatively fixed, and the reliability of the welding connection between the two is enhanced. Therefore, the electrical connection between the stator winding wire 211 and the busbar conductor 200 of the present application has better reliability. In one embodiment, the electrical connection structure of the present application has better reliability in a vibration environment or vibration working condition, and significantly reduces the risk of failure of the electrical connection structure. For example, the motor using the busbar of the present application has higher reliability in vehicle-mounted working conditions and is not easy to fail in a vibration environment.
[0038] The busbar and electric driver of the present application have the advantages of being simple and reliable, easy to implement, and convenient to use, and can improve the reliability of electrical connections and reduce the risk of failure in vibration conditions.
[0039] This specification discloses the present application with reference to the accompanying drawings, and also enables those skilled in the art to implement the present application, including making and using any device or system, selecting suitable materials, and using any combined method. The scope of the present application is defined by the technical solution for protection, and includes other examples that occur to those skilled in the art. As long as such other examples include structural elements that are not different from the literal language of the technical solution for protection, or such other examples include equivalent structural elements that are not substantially different from the literal language of the technical solution for protection, such other examples should be deemed to be within the scope of protection determined by the technical solution for protection of the present application.
Claims
1. A busbar, characterized in that: include: A body (100) configured to have an annular structure extending around an axial direction (AA) and comprising one or more through holes (110), wherein the through holes (110) extend along the axial direction (AA) and pass through the body (100); One or more busbar conductors (200), the busbar conductors (200) being disposed inside the body (100), and a first end of the busbar conductor (200) extending out from the through hole (110); The through hole (110) is dimensioned to accommodate the first end of the busbar conductor (200), and a reserved space is provided between the inner wall of the through hole (110) and the first end.
2. The busbar according to claim 1, characterized in that: The through hole (110) is spaced apart from the inner edge (101) and the outer edge (102) of the body (100).
3. The busbar according to claim 1, characterized in that: A plurality of through holes (110) are distributed on the body (100) along a circumferential direction (CC), and the plurality of through holes (110) are evenly or non-evenly distributed along the circumferential direction (CC).
4. The busbar according to claim 1, characterized in that: The first end of the busbar conductor (200) extends along an axial direction (AA).
5. The busbar according to claim 4, characterized in that: The first end of the busbar conductor (200) is arranged close to one side of the through hole (110) and extends to the outside of the body (100) along the axial direction (AA).
6. The busbar according to any one of claims 1 to 5, characterized in that: The remaining space is dimensioned to accommodate a stator winding wire (211) of a stator winding (21) of an electric drive (1).
7. An electric drive, characterized in that: include: A rotor (10) which pivots with the axial direction (AA) as the rotation axis; A stator (20), comprising a stator winding (21), wherein the stator winding (21) leads to a plurality of stator winding wires (211); and The busbar (30) according to any one of claims 1 to 6, which is arranged at one side of the stator (20); wherein each stator winding wire (211) corresponds to each through hole (110) and extends through the through hole (110) in an axial direction (AA); and Each stator winding conductor (211) is electrically connected to each busbar conductor (200).
8. The electric drive according to claim 7, characterized in that The stator winding wire (211) and the busbar conductor (200) are connected together by welding, and an electrical connection is established.
9. The electric drive according to claim 7, characterized in that The end of the stator winding wire (211) and the first end of the busbar conductor (200) are connected together via a welding point (212).
10. The electric drive according to any one of claims 7 to 9, characterized in that: The stator winding wire (211), the busbar conductor (200) and the through hole (110) have a cross section in one of the following shapes: rectangular, rounded rectangular, elliptical, circular, triangular, trapezoidal or a combination thereof.