Large-current transmission elastic metal sheet and driving motor all-in-one machine

Abstract

The utility model relates to a large-current transmission elastic metal sheet, which comprises a first surface welded on a circuit board of a driver used for driving a motor, and a second surface welded on the circuit board of the driver, the second surface is provided with a through hole for a locking component to correspondingly penetrate through so as to be fixed on a motor component of the motor; the two ends of the bending part are connected to the first surface and the second surface respectively, and a round corner is arranged at the joint of the bending part and the second surface.

Description

Technical Field

[0001] This application relates to a high-current transmission elastic metal sheet, and more particularly to a high-current transmission elastic metal sheet suitable for use in an integrated drive motor unit, which is elastic, allows for assembly tolerances between the motor junction box locking point and the driver circuit board, and allows for the flow of high current. Background Technology

[0002] Generally known integrated drive motor machine 1, such as Figure 1 As shown. The integrated drive motor unit 1 mainly consists of a driver 10 and a motor 11 connected together. And as... Figure 1As shown, the motor 11 has a motor connection plate 12, and the driver 10 has a drive circuit board 13. The connection between the driver 10 and the motor 11 is mainly achieved through the interconnection of the motor copper busbar 121 on the motor connection plate 12 and the connecting copper busbar 14 on the drive circuit board 13, thereby allowing three-phase or six-phase current to flow and achieving the internal electrical connection of the integrated drive motor 1. Generally, the motor copper busbar 121 and the connecting copper busbar 14 are tightly connected by screws 15 to achieve electrical connection. However, as shown in the figure, in the known integrated drive motor 1, the connecting copper busbar 14 is usually made of rigid copper plate with a certain thickness, which is not elastic. Moreover, there is generally a gap between the motor copper busbar 121 and the connecting copper busbar 14. Therefore, when the screws 15 are tightened on both, problems such as poor tightening, chipping, loosening, or poor conductivity can easily occur. Furthermore, in the integrated drive motor unit 1, there are typically multiple motor copper busbars 121 and overlapping copper busbars 14. Therefore, if the locking stress between each motor copper busbar 121 and overlapping copper busbar 14 is uneven, it may lead to excessive bending of the drive circuit board 13. In addition, since there is interference at the connection points between the motor copper busbars 121 and overlapping copper busbars 14, if the locking stress is uneven as mentioned above, it may cause the drive circuit board 13 to float, thereby pushing the upper housing 100 of the driver 10 to move upward or left and right, resulting in misalignment between it and the lower housing 110 of the motor 11, which may lead to problems such as assembly tilting and sealing failure. To solve the above problems, if other technologies are used, such as using wires and connectors to overlap the driver 10 and the motor 11, it will increase the space requirement and may require an increase in the overall size. Alternatively, if spring-loaded pins are used for overlap, it will increase the cost. If tongue connectors are used, they cannot withstand high current, thus limiting the high current capacity. Alternatively, adding a fixture to the motor 11 manufacturing process to control the positional accuracy of the motor junction box 12 would be detrimental to automation, limit assembly space, and require additional volume to the motor 11. Finally, relying on the material of the drive circuit board 13 itself to elastically absorb stress during assembly would restrict the thickness of the drive circuit board 13, and prevent the placement of wiring and electronic components near the contact points, thus wasting circuit board space. Therefore, while the above methods can solve problems such as the lack of elasticity in the assembly and locking of the integrated drive motor 1 in the prior art, the inability to allow and absorb tolerances between the locking points of the motor copper busbar 121 of the motor junction box 12 and the overlapping copper busbar 14 of the driver 10, and the stress damage to the drive circuit board 13, they also introduce further problems such as increased volume, higher costs, assembly difficulties, and wasted circuit board space. Therefore, none of these methods are optimal solutions.

[0003] Therefore, developing a high-current transmission elastic metal sheet that overcomes the above-mentioned shortcomings and can be used in integrated drive motors is an urgent need. Utility Model Content

[0004] One objective of this application is to provide a high-current transmission elastic metal sheet, comprising: a first surface, a second surface, and a bent portion, wherein the two ends of the bent portion are connected to the first surface and the second surface, and have rounded corners, thereby providing elastic support. Furthermore, because the high-current transmission elastic metal sheet itself is designed to be elastic, it can accommodate the tolerances between the locking points of the motor assembly of the motor junction box and the circuit board of the driver, and can prevent stress damage to the circuit board after locking.

[0005] Another objective of this application is to provide a high-current transmission elastic metal sheet, which incorporates various structural features, such as a height difference between the rounded corner and the second surface, a notch in the rounded corner, an arc-shaped notch on the second surface, an extension on the second surface, and a foot on the first surface. Through the design of these different structural features, it becomes more stable, less prone to deformation, and less prone to rotational displacement when locked to the corresponding locking component. Furthermore, the foot can increase the adhesion force, and the increased extension area on both sides allows for the flow of high current, thus facilitating the transmission of high current in the integrated drive motor.

[0006] According to the concept of this application, this application provides a high current transmission elastic metal sheet, which includes: a first surface, soldered to a circuit board of an actuator, wherein the actuator is used to drive a motor; a second surface, having a through hole for a locking component to be inserted through to fix it to a motor assembly of the motor; and a bent portion, with its two ends connected to the first surface and the second surface respectively, and having a rounded corner at the connection with the second surface.

[0007] According to the concept of this application, the first surface has a hole corresponding to a through hole on the second surface, and the diameter of the hole is larger than the diameter of the through hole.

[0008] According to the concept of this application, the locking component sequentially passes through a hole in the circuit board, a hole in the first surface, a through hole in the second surface, and a locking hole in the motor assembly.

[0009] According to the concept of this application, the first surface is parallel to the second surface.

[0010] According to the concept of this application, there is a height difference between the rounded corner of the bend and the second surface.

[0011] According to the concept of this application, the rounded corner of the bend has a notch.

[0012] According to the concept of this application, the second surface has an arc-shaped notch that communicates with the notch of the bent portion, and the notch is located at the center of the connection between the bent portion and the second surface.

[0013] According to the concept of this application, it includes two bent portions, which are respectively disposed on two opposite sides of the second surface, and each of the two bent portions is connected to the first surface and the second surface, and the connection between the two bent portions and the second surface has two rounded corners, and the two rounded corners have two notches.

[0014] According to the concept of this application, the second surface has two arc-shaped notches, which are respectively connected to two notches of two bends, and the two notches are respectively located at the center of the two connections between the bends and the second surface.

[0015] According to the concept of this application, it includes two first surfaces, which are respectively connected to the two bent portions, and both first surfaces are soldered to the circuit board.

[0016] According to the concept of this application, it includes a pin extending from a first surface.

[0017] According to the concept of this application, the second surface further has an extension that extends laterally from the second surface.

[0018] According to the concept of this application, the first surface is a stepped structure with bends on both sides, and the second surface has a height difference with the first surface, forming a hat-shaped structure.

[0019] According to the concept of this application, the bent portion is bent upward so that the second surface is higher than the first surface, or bent downward so that the second surface is lower than the first surface.

[0020] According to the concept of this application, this application provides an integrated drive motor unit, comprising: a motor including a motor junction box; a driver including a circuit board, wherein the driver is used to drive the motor; and a plurality of high current transmission elastic metal sheets, each high current transmission elastic metal sheet comprising: a first surface soldered to the circuit board; a second surface having a through hole for a locking component to be correspondingly inserted to fix it to a motor assembly on the motor junction box; and a bent portion, with both ends connected to the first surface and the second surface respectively, and the connection with the second surface having a rounded corner. Attached Figure Description

[0021] Figure 1 This is a simplified schematic diagram of the cross-sectional structure of a drive motor integrated machine based on known technology.

[0022] Figure 2 This is a partial exploded view of the drive motor integrated machine according to the first preferred embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the high-current transmission elastic metal sheet of the drive motor integrated machine of the first preferred embodiment of this application being locked onto the drive circuit board.

[0024] Figure 4A for Figure 3 The diagram shows an enlarged view of the high-current transmission elastic metal sheet and the screw.

[0025] Figure 4B for Figure 4A The bottom view of the high-current-transmitting elastic metal sheet is shown.

[0026] Figure 5 This is a schematic diagram of a high-current transmission elastic metal sheet according to the second preferred embodiment of this application.

[0027] Figure 6 This is a schematic diagram of a high-current transmission elastic metal sheet according to the third preferred embodiment of this application.

[0028] Figure 7 A schematic diagram of a high-current transmission elastic metal sheet according to the fourth preferred embodiment of this application.

[0029] Figure 8 This is a schematic diagram of a high-current transmission elastic metal sheet according to the fifth preferred embodiment of this application.

[0030] Figure 9 This is a schematic diagram of a high-current transmission elastic metal sheet according to the sixth preferred embodiment of this application.

[0031] Explanation of reference numerals in the attached figures

[0032] 1: Integrated drive motor unit

[0033] 10: Drive,

[0034] 100: Upper shell,

[0035] 11: Motor,

[0036] 110: Lower casing,

[0037] 12: Motor wiring reel,

[0038] 121: Motor busbar

[0039] 13: Driver circuit board,

[0040] 14: Overlapping copper busbars,

[0041] 15: Screws

[0042] 2: Integrated drive motor unit

[0043] 20: Drive,

[0044] 21: Motor

[0045] 22: Motor wiring reel,

[0046] 221: Motor assembly,

[0047] 221a: Keyhole,

[0048] 23: Circuit board,

[0049] 230: First surface

[0050] 231: Second surface

[0051] 24: Locking components

[0052] 25, 3, 4, 5, 6, 7: High-current transmission elastic metal sheets

[0053] 250, 30, 40, 401, 402, 50, 60, 70: First surface,

[0054] 250a, 600, 700: puncture

[0055] 251, 31, 41, 51, 61, 71: Second surface

[0056] 251a, 310, 410, 510, 610, 710: Through holes,

[0057] 251b, 411a, 411b, 513: Arc-shaped notch;

[0058] 251c, 512: Extension section

[0059] 252, 32, 42, 421, 422, 52, 62, 72: Bending section

[0060] 252a, 320, 421a, 422a, 520, 620, 720: Rounded corners

[0061] 252b, 421b, 422b, 521: Gap,

[0062] 253, 63, 73: Pin joints

[0063] 511: Broken line

[0064] 522: Incline,

[0065] R1, R2: Diameter,

[0066] h, h1, h2: height difference. Detailed Implementation

[0067] Some typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different ways, all of which do not depart from the scope of this application, and the descriptions and drawings herein are for illustrative purposes only and not for limiting the application. For example, if the following disclosure describes a first feature disposed on or above a second feature, it indicates that it includes embodiments where the first and second features are in direct contact, and also includes embodiments where additional features may be disposed between the first and second features, so that the first and second features may not be in direct contact. Furthermore, to facilitate the description of the relationship between one component or feature in the drawings and another component(s) or feature(s), spatially related terms such as "below," "above," and similar terms may be used. In addition to the orientations shown in the drawings, spatially related terms are used to cover different orientations of the device in use or operation. The device may also be otherwise positioned (e.g., rotated 90 degrees or located in other orientations), and the descriptions using the spatially related terms will be interpreted accordingly. Furthermore, it is understood that while terms such as "first" and "second" may be used within the scope of the patent application to describe different components, these components should not be limited by these terms. Therefore, the components described in the embodiments are represented by different component symbols. These terms are used to distinguish different components. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component without departing from the scope of the embodiments.

[0068] Please see Figure 2 , Figure 3 , Figure 4A and Figure 4B . Figure 2 This is a partial exploded view of the drive motor integrated machine according to the first preferred embodiment of this application. Figure 3 This is a schematic diagram of the high-current transmission elastic metal sheet of the drive motor integrated machine of the first preferred embodiment of this application being locked onto the drive circuit board. Figure 4A for Figure 3 The diagram shows an enlarged view of the high-current transmission elastic metal sheet and the screw. Figure 4B for Figure 4A The image shows a bottom view of a high-current-carrying elastic metal sheet. Figure 2 and Figure 3 As shown, the integrated drive motor 2 of this application includes a driver 20, a motor 21, and multiple high-current transmission elastic metal sheets 25. Figure 2 As shown, the driver 20 includes a circuit board 23 for driving the motor 21. The motor 21 includes a motor coil 22. In this embodiment, the circuit board 23 includes two opposing first surfaces 230 and second surfaces 231, and as shown... Figure 2As shown, the first surface 230 faces the driver 20 and is used to configure electronic components, while the second surface 231 faces the motor 21 and motor junction box 22, but is not limited thereto. And, as... Figure 4A and Figure 4B As shown, each high-current transmission elastic metal sheet 25 includes a first surface 250, a second surface 251, and a bent portion 252. The first surface 250 of the high-current transmission elastic metal sheet 25 is soldered to the second surface 231 of the circuit board 23 of the driver 20, and the second surface 251 has a through hole 251a for the locking assembly 24 to pass through and be fixed to the motor assembly 221 of the motor junction box 22 of the motor 21. The two ends of the bent portion 252 are respectively connected to the first surface 250 and the second surface 251, and the connection between the bent portion 252 and the second surface 251 has a rounded corner 252a. Figure 4A and Figure 4B As shown, there are two connections, and each connection is a strip connected to the second surface 251 with a rounded corner 252a.

[0069] Please continue reading. Figure 2 , Figure 3 , Figure 4A and Figure 4B First, as Figure 4A As shown, in this embodiment, each high-current-transmitting elastic metal sheet 25 has a perforation 250 on its first surface 250, but this is not a limitation. The position of the perforation 250a roughly corresponds to the through hole 251a on the second surface 251, and in this embodiment, the diameter R1 of the perforation 250a is larger than the diameter R2 of the through hole 251a, but this is not a limitation. Furthermore, as... Figure 2 and Figure 3 As shown, during internal assembly of the drive motor integrated unit 2 of this application, the first surface 250 of multiple high-current transmission elastic metal sheets 25 is first soldered to the second surface 231 of the circuit board 23. Then, locking components 24, such as screws, are sequentially inserted through the through holes 232 on the circuit board 23, the through holes 250a on the first surface 250 of the high-current transmission elastic metal sheets 25, the through holes 251a on the second surface 251 of the high-current transmission elastic metal sheets 25, and the locking holes 221a on the motor assembly 221 of the motor connection coil 22. This secures the circuit board 23 of the driver 20 and the multiple high-current transmission elastic metal sheets 25 to the motor connection coil 22, achieving both fixation and current transmission. Furthermore, because the high-current transmission elastic metal sheets 25 are designed to be elastic, they allow for tolerances between the locking points of the motor assembly 221 of the motor connection coil 22 and the circuit board 23 of the driver 20, and prevent stress damage to the circuit board 23 after locking.

[0070] Please see Figure 4A and Figure 4B.like Figure 4A As shown, the high-current transmission elastic metal sheet 25 of the first preferred embodiment of this application has a first surface 250, a second surface 251, and a bent portion 252 connecting the first surface 250 and the second surface 251. In this embodiment, the high-current transmission elastic metal sheet 25 can be, but is not limited to, a one-piece molded thin copper sheet, that is, the first surface 250, the second surface 251, and the bent portion 252 are a one-piece molded structure. Furthermore, as... Figure 4A and Figure 4B As can be seen, the first surface 250 is parallel to the second surface 251, but this is not a limitation. The parallel first surface 250 and second surface 251 facilitate the assembly and fastening of the locking assembly 24. Please refer to the following section. Figure 4B The bent portion 252 has a rounded corner 252a at the connection with the second surface 251. In this embodiment, there is a height difference h between the rounded corner 252a and the second surface 251. As shown in the figure, this height difference h causes the vertex (surface) of the extended rounded corner 252a to be higher than or equal to the second surface 251, but is not limited to this. In this embodiment, the design of this bent portion 252 allows the high-current transmission elastic metal sheet 25 to provide elasticity during pre-compression. Furthermore, the design of the rounded corner 252a and the fact that the vertex of the rounded corner 252a is higher than the second surface 251 further increases the elasticity of the high-current transmission elastic metal sheet 25. Therefore, when the high-current transmission elastic metal sheet 25 is locked, this elastic design can absorb the locking stress, thereby reducing stress damage to the circuit board 23 when it is locked to the circuit board 23.

[0071] Please continue reading. Figure 4B As shown in the figure, the rounded corner 252a of the bent portion 252 of the high-current transmission elastic metal sheet 25 has a notch 252b. In this embodiment, the notch 252b is located at the center of the rounded corner 252a, that is, at the center of the connection with the second surface 251, but it is not limited thereto. The design of this notch 252b is mainly used to weaken the deformation resistance of the bent portion 252. In other words, when subjected to a large locking stress from the locking component 24, through the design of this notch 252b, some of the stress can be offset by the notch 252b when the bent portion 252 undergoes elastic deformation, thereby making the structure of the high-current transmission elastic metal sheet 25 more stable and less prone to deformation. In some embodiments, such as Figure 4B As shown, the second surface 251 of the high-current transmission elastic metal sheet 25 may also have a notch, such as an arc-shaped notch 251b, but is not limited thereto. This arc-shaped notch 251b is a hollow arc-shaped groove, and it is adjacent to the bending portion 252 and communicates with the notch 252b of the bending portion 252. In this way, when the locking assembly 24 is locked, the arc-shaped notch 251b can effectively reduce the angular displacement caused by the deformation of the high-current transmission elastic metal sheet 25, so it is not easy to generate rotational displacement, which is more conducive to stable locking operation.

[0072] In other embodiments, the high-current-carrying elastic metal sheet 25 may also include pins 253, but is not limited thereto. For example, such as Figure 4A and Figure 4B As shown, the high-current transmission elastic metal sheet 25 in this embodiment has two leads 253, both of which extend from the first surface 250 for use in Dual In Line Package Process (DIP) or Paste-In-Hole (PIH) processes, thereby increasing the adhesion between the high-current transmission elastic metal sheet 25 and the circuit board 23. In this embodiment, the two leads 253 are correspondingly disposed on two opposite sides of the first surface 250, with one side opposite the notch 252b of the bend 252, but this is not a limitation. The position and number of leads 253 can be arbitrarily varied according to actual needs or implementation conditions, and are not limited thereto. Furthermore, in some embodiments, the high-current transmission elastic metal sheet 25 also has an extension 251c, such as... Figure 4A and Figure 4B As shown, the second surface 251 of the high-current transmission elastic metal sheet 25 has two extensions 251c, which are formed by extending outward from two opposite sides of the second surface 251. However, their position, shape, and size are not limited thereto and can be arbitrarily varied according to actual needs or application conditions. In this embodiment, the total surface area of ​​the second surface 251 can be increased by these two outwardly extending extensions 251c, thus increasing the cross-sectional area for current transmission and facilitating the transmission of high current.

[0073] Please see Figure 5 . Figure 5This is a schematic diagram of the high-current transmission elastic metal sheet according to the second preferred embodiment of this application. In this embodiment, the high-current transmission elastic metal sheet 3 is also applicable to the aforementioned integrated drive motor 2, and there can be multiple of them. They are also connected and disposed between the circuit board 23 of the driver 20 and the motor connection plate 22 of the motor 21. Therefore, in this embodiment, by using multiple locking components 24 to lock the circuit board 23 of the driver 20 and the multiple high-current transmission elastic metal sheets 3 onto the motor assembly 221 of the motor connection plate 22, the purpose of fixing and current transmission can be achieved. In this embodiment, each high-current transmission elastic metal sheet 3 also includes a first surface 30, a second surface 31, and a bent portion 32. The first surface 30 is used to be soldered onto the circuit board 23. The second surface 31 has a through hole 310 for the corresponding insertion of the locking component 24 to fix it onto the motor assembly 221 of the motor connection plate 22. The two ends of the bent portion 32 are respectively connected to the first surface 30 and the second surface 31, and the connection between it and the second surface 31 has a rounded corner 320. This design of the bent portion 32 and its rounded corner 320 provides elasticity. Therefore, when the high-current transmission elastic metal sheet 3 is locked, this elastic design can absorb the locking stress, thereby reducing stress damage to the circuit board 23 when it is locked to the circuit board 23.

[0074] Please see Figure 6 . Figure 6This is a schematic diagram of the high-current transmission elastic metal sheet according to the third preferred embodiment of this application. Similar to the aforementioned embodiments, the high-current transmission elastic metal sheet 4 of this embodiment is also applicable to the aforementioned integrated drive motor 2, and its quantity can also be multiple, similarly connected and disposed between the circuit board 23 of the driver 20 and the motor connection plate 22 of the motor 21. Similarly, by using multiple locking components 24 to lock the circuit board 23 of the driver 20 and the multiple high-current transmission elastic metal sheets 4 of this embodiment onto the motor assembly 221 of the motor connection plate 22, the purpose of fixation and current transmission can be achieved. In this embodiment, the high-current transmission elastic metal sheet 4 also includes a first surface 40, a second surface 41, and a bent portion 42. The first surface 40 is used to weld onto the circuit board 23, and the second surface 41 also has a through hole 410 for the corresponding insertion of the locking component 24. In this embodiment, the high-current transmission elastic metal sheet 4 includes two bent portions 421 and 422, which are respectively disposed on opposite sides of the second surface 41. Each bent portion 421 and 422 has its two ends connected to the first surface 40 and the second surface 41, respectively. The connection points between each bent portion and the second surface 41 have rounded corners 421a and 422a, and each rounded corner 421a and 422a has a notch 421b and 422b, for example, located at the center of the connection points on both sides, but not limited thereto. Through the design of the bent portions 421 and 422, the rounded corners 421a and 422a, and the notches 421b and 422b respectively disposed on both sides of the second surface 41, the stress generated during locking can be effectively dispersed, thus effectively reducing stress damage to the circuit board 23 when it is locked to the circuit board 23. In addition, as shown in the figure, the second surface 41 of the high-current transmission elastic metal sheet 4 also has two arc-shaped notches 411a and 411b, which are connected to the two notches 421b and 422b of the two bending portions 421 and 422, respectively. Therefore, it can effectively reduce the angular displacement caused by deformation, and thus is less prone to rotational displacement when the high-current transmission elastic metal sheet 4 is locked. In addition, in this embodiment, the high-current transmission elastic metal sheet 4 also includes two first surfaces 401 and 402, which are connected to the two bending portions 421 and 422, respectively, and both first surfaces 401 and 402 are soldered to the circuit board 23. In this embodiment, the two first surfaces 401 and 402, the two bending portions 421 and 422, and the second surface 41 can also be integrally formed thin copper sheets, but are not limited thereto. Furthermore, the two first surfaces 401 and 402 are parallel to the second surface 41, but the two first surfaces 401 and 402 are separated by a certain distance, and this distance is greater than the through hole 410 of the second surface 41.In this way, when they are assembled, the locking components 24, such as screws, are sequentially passed through the through holes 232 on the circuit board 23. Figure 2 As shown, the gap between the two first surfaces 401 and 402 of the high-current transmission elastic metal sheet 4, the through hole 410 of the second surface 41 of the high-current transmission elastic metal sheet 4, and the locking hole 221a on the motor assembly 221 of the motor junction plate 22 are used to lock the circuit board 23 of the driver 20 and the multiple high-current transmission elastic metal sheets 4 onto the motor junction plate 22, thereby achieving the purpose of current transmission. It can be seen that the number and size of the first surfaces 40, the number and position of the bent portions 42 and their rounded corners 421a, 422a, and notches 421b, 422b can be arbitrarily changed according to actual needs or implementation conditions, and are not limited to this embodiment.

[0075] Please see Figure 7 . Figure 7 A schematic diagram of the high-current transmission elastic metal sheet of the fourth preferred embodiment of this application. Similar to the aforementioned embodiments, the high-current transmission elastic metal sheet 5 of this embodiment is also applicable to the aforementioned integrated drive motor 2, and there can be multiple sheets of it. It is also connected and disposed between the circuit board 23 of the driver 20 and the motor connection plate 22 of the motor 21. Multiple locking components 24 can be used to lock the circuit board 23 of the driver 20 and the multiple high-current transmission elastic metal sheets 5 of this embodiment onto the motor assembly 221 of the motor connection plate 22, respectively, to achieve the purpose of fixation and current transmission. In this embodiment, the high-current transmission elastic metal sheet 5 also includes a first surface 50, a second surface 51, and a bent portion 52. The first surface 50 is parallel to the second surface 51, and the first surface 50 is used to be soldered onto the circuit board 23. The second surface 51 also has a through hole 510 for the corresponding insertion of the locking component 24. Similar to the aforementioned embodiment, the two ends of the bent portion 52 are respectively connected to the first surface 50 and the second surface 51, and the connection between it and the second surface 51 has a rounded corner 520, and the rounded corner 520 has a notch 521, for example, located in the center of the connection, but not limited thereto. This design of the bent portion 52, the rounded corner 520, and the notch 521 provides elasticity. In this embodiment, the second surface 51 also has an arc-shaped notch 513, and the arc-shaped notch 513 communicates with the notch 521 of the rounded corner 520. In this embodiment, the second surface 51 also has a fold line 511, and a slope 522 is provided between the rounded corner 520 and the fold line 511, through which a larger elastic buffer space can be provided. Figure 7As shown, the two ends of the arc-shaped notch 513 are flush with the fold line 511, thus more effectively absorbing the angular displacement caused by its elastic deformation. In this way, when the high-current transmission elastic metal sheet 5 is locked, the elastic design of the bend 52, rounded corner 520, notch 521, and inclined surface 522 can absorb the locking stress, thereby reducing stress damage to the circuit board 23 when it is locked. Simultaneously, the arc-shaped notch 513 on the second surface 51 can reduce the angular displacement during locking, making it less prone to rotational displacement and facilitating a more stable locking operation. In addition, in this embodiment, the second surface 51 also has two extensions 512, which are formed by extending outwards from two opposite sides of the second surface 51. However, their position, shape, and size are not limited thereto and can be arbitrarily varied according to actual needs or operating conditions. Furthermore, in this embodiment, the total surface area of ​​the second surface 51 can be increased by the extension portion 512 extending in both directions, thereby increasing the cross-sectional area for current transmission and facilitating the transmission of large currents.

[0076] Please also refer to Figure 8 and Figure 9 . Figure 8 This is a schematic diagram of a high-current transmission elastic metal sheet according to the fifth preferred embodiment of this application. Figure 9This is a schematic diagram of the high-current transmission elastic metal sheet according to the sixth preferred embodiment of this application. Similar to the aforementioned embodiments, the high-current transmission elastic metal sheets 6 and 7 of these two embodiments are also applicable to the aforementioned integrated drive motor 2, and there can be multiple of them. They are also connected and disposed between the circuit board 23 of the driver 20 and the motor connection plate 22 of the motor 21. The circuit board 23 of the driver 20 and the multiple high-current transmission elastic metal sheets 6 and 7 of these two embodiments can be locked to the motor assembly 221 of the motor connection plate 22 by multiple locking components 24 to achieve the purpose of fixation and current transmission. In these two embodiments, the high-current transmission elastic metal sheets 6 and 7 also include first surfaces 60 and 70, second surfaces 61 and 71, and bent portions 62 and 72, respectively. The first surfaces 60 and 70 are used to be soldered to the circuit board 23, and the second surfaces 61 and 71 each have through holes 610 and 710 for the corresponding insertion of the locking components 24. Similar to the aforementioned embodiments, the two ends of the bent portions 62 and 72 are respectively connected to the first surfaces 60 and 70 and the second surfaces 61 and 71, and the connection points with the second surfaces 61 and 71 also have rounded corners 620 and 720 to provide elasticity. In both embodiments, the two high-current transmission elastic metal sheets 6 and 7, viewed from the side, are both cap-shaped structures, that is, the first surfaces 60 and 70 are stepped structures with bends on both sides. However, in both embodiments, the first surfaces 60 and 70 of the two high-current transmission elastic metal sheets 6 and 7 each have a square perforated hole 600 and 700, and the area of ​​the square perforated hole 600 and 700 is larger than that of the second surfaces 61 and 71. Please refer to... Figure 8 As shown in the figure, the design of the bending portion 62 and its rounded corner 620 folding upwards and connecting to the second surface 61 creates a height difference h1 between the second surface 61 and the first surface 60. This height difference h1, as shown in the figure, ensures that the vertex (surface) of the extended rounded corner 620 is higher than or equal to the second surface 61, but is not limited to this. In other words, the second surface 61 is higher than the stepped first surface 60, meaning the second surface 61 is elastically suspended in the square perforated hole 600 of the first surface 60, and its position is higher than the first surface 60. Therefore, when the locking component 24 is locked into the through hole 610 of the second surface 61, this suspension elasticity can absorb the stress generated during locking and reduce stress damage caused when it is locked to the circuit board 23. Please continue reading. Figure 9Similar to the aforementioned embodiments, by bending the portion 72 and its rounded corner 720 downwards and connecting it to the second surface 71, a height difference h2 is also created between the first surface 70 and the second surface 71. As shown in the figure, this height difference h2 causes the vertex (surface) of the extended rounded corner 720 to be higher than or equal to the second surface 71, but is not limited to this. In this embodiment, the second surface 71 is lower than the stepped first surface 70, meaning the second surface 71 is elastically suspended within the square perforated hole 700 of the first surface 70, and its position is lower than the first surface 70. Furthermore, in both embodiments, multiple leads 63 and 73 extend from both sides of the stepped first surfaces 60 and 70, thereby increasing the adhesion between the high-current transmission elastic metal sheets 6 and 7 and the circuit board 23. Of course, the position and number of leads 63 and 73 can be varied according to the actual implementation situation and are not limited thereto.

[0077] Therefore, it can be seen that the high current transmission elastic metal sheets 25, 3, 4, 5, 6, and 7 in each of the aforementioned embodiments have different appearances, such as C-shaped, cap-shaped, or door-shaped, etc. They all have bent portions and rounded corners that can connect the two surfaces to provide elastic support. Furthermore, these high current transmission elastic metal sheets 25, 3, 4, 5, 6, and 7 can all be made of thin and elastic metal sheets, which can further increase their elasticity. They can be used in combination according to different current, tolerance, and process requirements, and are not limited to the aforementioned embodiments.

[0078] In summary, this application provides a high-current transmission elastic metal sheet, comprising a first surface, a second surface, and a bent portion. The two ends of the bent portion are connected to the first and second surfaces and have rounded corners, thereby providing elastic support. Furthermore, because the high-current transmission elastic metal sheet is inherently elastic, it allows for tolerances between the locking points of the motor assembly on the motor junction box and the driver, and avoids stress damage to the circuit board after locking. Based on the thin, light, and elastic characteristics of the high-current transmission elastic metal sheet, it can save assembly time and material costs without increasing additional volume space or requiring changes to the circuit board design, and it is more stable during locking, less likely to cause damage or deformation to the circuit board. Furthermore, various structural features can be designed into the high-current transmission elastic metal sheet, such as a height difference between the rounded corner and the second surface, a notch in the rounded corner, an arc-shaped notch in the second surface, an extension in the second surface, and a foot in the first surface. Through the design of these different structural features, it is more stable, less prone to deformation, and less prone to rotational displacement when it is locked to the locking component. The foot can increase the adhesion force, and the increased extension area on both sides can provide a large current flow, which is beneficial for the high current transmission in the integrated drive motor.

[0079] This application may be modified in various ways by those skilled in the art, but none of them shall depart from the protection sought by the appended claims.

Claims

1. A high current transmission flexible metal sheet, wherein, A first surface is soldered to a circuit board of a driver, wherein the driver is used to drive a motor. A second surface has a through hole for a locking assembly to be correspondingly threaded to be fixed to a motor assembly of the motor. A bending portion has two ends connected to the first surface and the second surface respectively, and has a fillet at the connection with the second surface. The first surface has a broken hole corresponding to the through hole of the second surface, and a diameter of the broken hole is larger than a diameter of the through hole. The locking assembly is sequentially threaded through a hole of the circuit board, the broken hole of the first surface, the through hole of the second surface, and a lock hole of the motor assembly.

2. The high current transmission flexible metal strip of claim 1, wherein, The first surface and the second surface are parallel.

3. The high current transmission flexible metal strip of claim 2, wherein, The fillet of the bending portion has a height difference with the second surface.

4. The high current transfer flexible metal strip of claim 1, wherein, The fillet of the bending portion has a notch.

5. The high current transfer flexible metal strip of claim 1, wherein, The second surface has an arc-shaped notch in communication with the notch of the bending portion, wherein the notch is located at the center of the connection between the bending portion and the second surface.

6. The high current transfer flexible metal strip of claim 1, wherein, Two bending portions are correspondingly arranged at two opposite sides of the second surface, wherein each of the two bending portions is connected to the first surface and the second surface respectively, and the two bending portions have two fillets at the connections with the second surface, and the two fillets have two notches.

7. The high current transfer flexible metal strip of claim 6, wherein, The second surface has two arc-shaped notches in communication with the two notches of the two bending portions, wherein the two notches are located at the centers of the two connections between the bending portions and the second surface.

8. The high current transfer flexible metal strip of claim 1, wherein, Two first surfaces are connected to the two bending portions respectively, and the two first surfaces are soldered to the circuit board.

9. The high current transfer flexible metal strip of claim 8, wherein, A pin is further extended from the first surface.

10. The high current transmission flexible metal strip of claim 8, wherein, The second surface further has an extension formed by extending from one side of the second surface.

11. The high current transfer flexible metal strip of claim 1, wherein, The first surface is a stepped structure with two sides bent, and the second surface has a height difference with the first surface to become a cap-shaped structure.

12. The high current transfer flexible metal strip of claim 1, wherein, The bending portion is bent upward to make the second surface higher than the first surface, or the bending portion is bent downward to make the second surface lower than the first surface.

13. The high current transfer flexible metal strip of claim 1, wherein, A motor includes a motor terminal plate.

14. The high current transfer flexible metal strip of claim 13, wherein, A driver includes a circuit board, wherein the driver is used to drive the motor, and a plurality of large current transmission elastic metal sheets, each of which includes:

15. A drive motor all-in-one machine, wherein, A first surface is soldered to the circuit board. A second surface has a through hole for a locking assembly to be correspondingly threaded to be fixed to a motor assembly of the motor terminal plate. A bending portion has two ends connected to the first surface and the second surface respectively, and has a fillet at the connection with the second surface. ​ ​ ​ ​

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