A motor busbar structure

Abstract

The utility model discloses a kind of motor busbar structures;Belong to motor technical field;Its technical key points include retainer, the retainer upper portion is provided with cover, the retainer and cover are all annular, the retainer upper end surface is equipped with the annular array distribution of several insertion slots, the lower end surface of the cover is fixedly connected with the plug block corresponding to each insertion slot one by one.The utility model is through insertion slot, plug block cooperation and spring drive's locking rod structure, without twisting fastener one by one, only need to press cover to make flexible pad compression to locking rod and locking groove alignment, locking rod can be automatically clamped into locking groove by the aid of spring elastic force, complete busbar and the quick assembly of cover;When disassembling, each slider is synchronously slid by synchronous drive assembly, so that locking rod is separated from locking groove, overall operation does not need complex tool, greatly simplifies dismounting step, significantly improves the dismounting efficiency of motor busbar, especially suitable for the operation scene of narrow space inside motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically a motor bus structure. Background Technology

[0002] In recent years, with the rapid development of automobile technology, especially new energy vehicle technology, electric drive systems have gradually moved towards higher speeds, smaller size, and higher efficiency. At the same time, the overall vehicle has placed higher demands on the cost and performance of electric drive systems. Therefore, motor assemblies are gradually developing towards miniaturization, lightweighting, and integration. EPS (Electric Power Steering) brushless motors are increasingly favored due to their outstanding advantages such as low noise, smooth operation, long lifespan, and high power density.

[0003] For example, Chinese patent CN218920201U discloses a busbar structure for an electric motor and an electric motor. The busbar structure includes a cover and a busbar. The cover has a structure for assembling with the busbar and a first mounting hole. The busbar includes a first copper busbar extending along the axial direction of the motor for connection to the motor's circuit board; a second copper busbar extending radially along the motor for connection to the motor's windings; and a retainer for fixing the first and second copper busbars, which are disposed within the retainer. The retainer has multiple second mounting holes. The busbar is securely connected to the cover by multiple fasteners passing through the first mounting holes. This application can solve the problems existing in the current connection method of soldering the terminals of the busbar to the circuit board, ensuring the required insertion displacement of the copper busbar during the insertion process, and facilitating the lightweight development of the motor system.

[0004] However, in practical applications, the assembly of busbars and covers currently relies heavily on fasteners (such as screws). During disassembly and assembly, each screw must be tightened individually, which is not only cumbersome and time-consuming but also requires specialized tools. This is especially problematic in confined spaces within the motor, where tool operation is limited, further reducing efficiency. Furthermore, repeated disassembly and assembly can lead to stripped screws and worn holes, affecting connection stability and increasing maintenance costs. In addition, some busbar structures use non-removable connections (such as welding), which, while ensuring connection strength, require damaging the original structure for subsequent repairs or replacements, hindering rapid maintenance and failing to meet the motor system's need for convenient disassembly and assembly. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a motor busbar structure. This technical solution solves the problem mentioned in the background art that the current assembly of the busbar and the cover relies heavily on fasteners, which makes it impossible to achieve quick maintenance and is difficult to adapt to the motor system's requirements for easy disassembly and assembly.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A motor bus structure includes a retainer with a cover on top. Both the retainer and the cover are annular. The upper surface of the retainer has a plurality of slots arranged in a circular array. The lower surface of the cover is fixedly connected to a plug corresponding to each slot. The plug and the slot are clearance-fitted with a clearance of 0.05-0.1 mm. A cavity is provided inside the plug. Two parallel sliding rods are fixedly connected inside the cavity. The sliding rods are perpendicular to the axis of the cover. A slider is slidably connected to both sliding rods. A spring is sleeved on the sliding rod. One end of the spring abuts against the side of the slider near the axis of the cover, and the other end abuts against the side of the slot near the axis of the cover. A locking rod is fixedly connected to the middle of the side of the slider away from the axis of the cover. A locking groove adapted to the locking rod is provided on the side wall of the slot. A synchronous drive assembly is provided on the top of the cover to drive each slider to slide simultaneously on the sliding rod.

[0007] Preferably, a flexible pad is provided at the bottom of the slot. The flexible pad is made of silicone rubber with a Shore hardness of 50-60HA. When the insert is inserted into the slot and the bottom of the insert is in contact with the flexible pad, the initial thickness of the flexible pad is 2-3mm. When the insert is pressed to compress the flexible pad by 0.5-1mm, the locking rod is aligned with the locking groove.

[0008] Preferably, both the insertion end of the locking rod and the inlet of the locking groove are rounded.

[0009] Preferably, the synchronous drive assembly includes movable through slots formed on the upper end face of the cover and corresponding one-to-one with the cavities in each insert block. Each movable through slot is connected to the corresponding cavity. A connecting rod is fixedly connected to the top of the slider and moves within the movable through slot. The top end of the connecting rod extends to the outside of the movable through slot and is rotatably connected to a linkage plate. A rotating ring is rotatably connected to the upper end face of the cover and is coaxially arranged. The end of each linkage plate away from the connecting rod is rotatably connected to the top of the rotating ring. When the slider rotates around the axis of the cover, the rotational motion is converted into linear motion of the connecting rod along the movable through slot through the linkage plate, thereby driving the slider to slide on the sliding rod. The lengths of each linkage plate are consistent, and the connection points with the rotating ring are evenly distributed along the circumference of the rotating ring to ensure synchronous movement of each slider.

[0010] Preferably, the top of the rotating ring is provided with a tool insertion slot.

[0011] Preferably, the upper end face of the retainer is fixedly connected with a plurality of support columns arranged in a circular array and the number of such columns is the same as that of the slots. Each of the support columns is located in the middle of two adjacent slots. A first copper busbar is provided on the support column. A plurality of second copper busbars are provided on the outer peripheral surface of the retainer. The cover is provided with clearance slots that correspond to and are adapted to each support column.

[0012] Compared with the prior art, the present invention provides a motor bus structure with the following advantages: 1. This utility model uses a locking rod structure with slots, inserts, and spring drive. It eliminates the need to tighten each fastener individually. Simply press the cover to compress the flexible pad until the locking rod aligns with the locking groove. The spring force then automatically engages the locking rod with the locking groove, completing the quick assembly of the busbar and the cover. During disassembly, the synchronous drive component drives each slider to slide synchronously, causing the locking rod to disengage from the locking groove. The entire operation requires no complex tools, greatly simplifying the disassembly and assembly steps and significantly improving the efficiency of disassembly and assembly of the motor busbar. It is especially suitable for operation scenarios with narrow spaces inside the motor.

[0013] 2. This utility model ensures the assembly accuracy of the insert and slot through clearance fit, and combined with the buffering effect of the silicone rubber flexible pad, it avoids the problems of stripping and hole wear caused by repeated disassembly and assembly in traditional fastener connections, thus extending the service life of the structure. At the same time, the synchronous drive component ensures that each locking rod moves synchronously through equal-length linkage plates and evenly distributed connection points, avoiding the impact of a single locking structure jamming on disassembly and assembly. This not only ensures the stability of the connection between the busbar and the cover, but also solves the problem of damaging the original components during the maintenance of traditional structures, reducing maintenance costs and adapting to the lightweight and integrated development needs of motor systems. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the upper end face structure of the cover body in this utility model; Figure 3 This is a schematic diagram of the lower end face structure of the cover body in this utility model; Figure 4 This is a schematic diagram of the upper end face structure of the cage in this utility model; Figure 5 This is a cross-sectional view of the retainer and cover in this utility model; Figure 6 In this utility model Figure 5 A magnified structural diagram at point A.

[0015] The following are the labels in the diagram: 1. Cage; 2. Cover; 3. Slot; 4. Insert; 5. Cavity; 6. Slide rod; 7. Slider; 8. Spring; 9. Locking rod; 10. Locking groove; 11. Synchronous drive assembly; 1101. Movable through groove; 1102. Connecting rod; 1103. Linkage plate; 1104. Rotating ring; 12. Flexible pad; 13. Tool insertion groove; 14. Support column; 15. First copper busbar; 16. Second copper busbar; 17. Clearance through groove. Detailed Implementation

[0016] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0017] Example 1 Please refer to Figures 1 to 6 As shown, a motor busbar structure includes a cage 1, with a cover 2 positioned above the cage 1. Both the cage 1 and the cover 2 are annular. The upper surface of the cage 1 has several slots 3 arranged in a circular array. The lower surface of the cover 2 is fixedly connected to inserts 4 corresponding to each slot 3. The inserts 4 and slots 3 are fitted with a clearance of 0.05-0.1 mm. Each insert 4 has a cavity 5, and two parallel sliding rods 6 are fixedly connected within the cavity 5. The sliding rods 6... The axes of the cover 2 are perpendicular to each other. Two sliders 6 are slidably connected to each other. A spring 8 is sleeved on the slider 6. One end of the spring 8 abuts against the side of the slider 7 near the axis of the cover 2, and the other end abuts against the side of the slot 3 near the axis of the cover 2. A locking rod 9 is fixedly connected to the middle of the side of the slider 7 away from the axis of the cover 2. A locking groove 10 adapted to the locking rod 9 is opened on the side wall of the slot 3. A synchronous drive assembly 11 is provided on the top of the cover 2 to drive each slider 7 to slide simultaneously on the slider 6.

[0018] Those skilled in the art will understand that the synchronous drive assembly 11 on the top of the cover 2 can drive all the sliders 7 to slide synchronously along the slide bar 6. During assembly, the insert 4 is inserted into the slot 3, and the elastic force of the spring 8 pushes the slider 7 to drive the locking rod 9 to insert into the locking groove 10, thereby locking the retainer 1 and the cover 2; during disassembly, the synchronous drive assembly 11 drives the slider 7 to compress the spring 8, causing the locking rod 9 to disengage from the locking groove 10 and releasing the lock.

[0019] The gap fit ensures the assembly accuracy of the plug 4 and the slot 3, avoiding structural shaking caused by assembly deviation; the locking structure driven by the spring 8 does not rely on fasteners, simplifying the assembly steps and eliminating the need to tighten screws one by one, greatly improving the efficiency of disassembly and assembly; the synchronous drive component 11 can realize the synchronous action of all locking rods 9, avoiding jamming of individual locking structures, ensuring smooth disassembly and assembly, and adapting to the operation scenario of narrow space inside the motor.

[0020] Example 2 Furthermore, a flexible pad 12 is provided at the bottom of the slot 3. The flexible pad 12 is made of silicone rubber with a Shore hardness of 50-60HA. When the insert 4 is inserted into the slot 3 and the bottom of the insert 4 is in contact with the flexible pad 12, the initial thickness of the flexible pad 12 is 2-3mm. When the insert 4 is pressed to compress the flexible pad 12 by 0.5-1mm, the locking rod 9 is aligned with the locking groove 10.

[0021] Those skilled in the art will understand that when the insert 4 is inserted into the slot 3 and its bottom is in contact with the flexible pad 12, the locking rod 9 and the locking groove 10 are slightly misaligned. When downward pressure is applied to the cover 2, the insert 4 compresses the flexible pad 12 to a compression amount of 0.5-1mm. At this time, the relative position of the retainer 1 and the cover 2 changes, the locking rod 9 and the locking groove 10 are precisely aligned, and the spring 8 pushes the slider 7 to make the locking rod 9 engage with the locking groove 10, thus completing the locking. After disassembly, the flexible pad 12 elastically resets, causing the insert 4 to spring back, which facilitates the positioning of the next assembly.

[0022] Example 3 Furthermore, the insertion end of the locking rod 9 and the inlet of the locking groove 10 are both rounded.

[0023] Those skilled in the art will understand that when the spring 8 pushes the slider 7 to move the locking rod 9 into the locking groove 10, the rounded corner structure can guide the locking rod 9 to smoothly enter the locking groove 10. Even if there are minor assembly deviations, the guiding effect of the rounded corner can prevent the locking rod 9 from getting stuck at the inlet of the locking groove 10, improve the smoothness of disassembly and assembly operations, reduce friction and wear between components, and improve the fault tolerance of the structure.

[0024] Example 4 Furthermore, the synchronous drive assembly 11 includes movable through slots 1101 formed on the upper end face of the cover 2 and corresponding one-to-one with the cavities 5 in each insert block 4. Each movable through slot 1101 is connected to the corresponding cavity 5. A connecting rod 1102 is fixedly connected to the top of the slider 7 and moves within the movable through slot 1101. The top end of the connecting rod 1102 extends to the outside of the movable through slot 1101 and is rotatably connected to a linkage plate 1103. A coaxially arranged rotating ring 110 is rotatably connected to the upper end face of the cover 2. 4. The ends of each linkage plate 1103 away from the connecting rod 1102 are rotatably connected to the top of the rotating ring 1104. When the rotating ring 1104 rotates around the axis of the cover 2, the rotational motion is converted into linear motion of the connecting rod 1102 along the movable through groove 1101 through the linkage plate 1103, thereby driving the slider 7 to slide on the slide rod 6. The lengths of each linkage plate 1103 are consistent, and the connection points with the rotating ring 1104 are evenly distributed along the circumference of the rotating ring 1104 to ensure that each slider 7 moves synchronously.

[0025] Those skilled in the art will understand that, through the transmission structure of the rotating ring 1104, the linkage plate 1103, and the connecting rod 1102, the synchronous movement of all sliders 7 can be achieved simply by rotating the rotating ring 1104, without the need to operate the locking structure one by one, which greatly improves the efficiency of disassembly and assembly; the equal-length linkage plate 1103 and the evenly distributed connection points ensure that the movement stroke of each slider 7 is consistent, avoiding structural jamming caused by asynchronous movement of a single locking rod 9, and ensuring the stability of the disassembly and assembly process.

[0026] Example 5 Furthermore, a tool insertion slot 13 is provided on the top of the rotating ring 1104.

[0027] Those skilled in the art will understand that a tool insertion slot 13 is provided on the top of the rotating ring 1104. This slot can be adapted to commonly used tools. When it is necessary to drive the rotating ring 1104 to rotate, the tool is inserted into the tool insertion slot 13. The torque applied by the tool drives the rotating ring 1104 to rotate around the axis of the cover body 2, and then drives the slider 7 to move through the synchronous drive assembly 11.

[0028] The tool slot 13 provides a convenient point of force application for the rotation of the rotating ring 1104. Especially when the internal space of the motor is narrow and manual operation is inconvenient, sufficient torque can be easily applied with the help of tools, avoiding the inefficiency caused by slippage during manual operation. It is compatible with a variety of commonly used tools, eliminating the need for special tools, reducing the operating threshold, and improving the practicality and convenience of the structure.

[0029] Example 6 Furthermore, the upper end face of the retainer 1 is fixedly connected with a number of support columns 14 arranged in a ring array and the same number as the number of slots 3. Each support column 14 is located in the middle of two adjacent slots 3. A first copper busbar 15 is provided on the support column 14. A number of second copper busbars 16 are provided on the outer periphery of the retainer 1. The cover 2 is provided with clearance slots 17 that correspond to and are adapted to each support column 14.

[0030] Those skilled in the art will understand that during assembly, the support column 14 passes through the clearance slot 17 to avoid interference between the cover 2 and the support column 14 and the first copper busbar 15; the first copper busbar 15 extends along the motor axis and is used to connect with the motor circuit board, and the second copper busbar 16 extends along the motor radial direction and is used to connect with the motor winding to realize the current conduction between the circuit board and the winding.

[0031] The working principle and usage procedure of this device are as follows: When assembling the motor busbar structure, first place the retainer 1 in the designated assembly position and confirm that the slots 3 distributed in a ring array on the upper end face of the retainer 1 are free of impurities. Then, pick up the cover 2 and align the insert 4, which corresponds to each slot 3 on the lower end face of the cover 2, with the slot 3. Slowly insert the insert 4 into the slot 3 until the bottom of the insert 4 is in contact with the flexible pad 12. At this time, since the flexible pad 12 is not compressed, the locking rod 9 on the slider 7 in the inner cavity 5 of the insert 4 is slightly misaligned with the locking groove 10 on the side wall of the slot 3. Then, apply downward pressure to the cover 2. The force pushes the insert 4 to compress the flexible pad 12. When the compression of the flexible pad 12 reaches 0.5-1mm, the locking rod 9 and the locking groove 10 are precisely aligned. At this time, the spring 8 sleeved on the inner slide rod 6 of the insert 4 releases its elastic force, pushing the slider 7 to slide along the two parallel slide rods 6 that are perpendicular to the axis of the cover 2. This causes the locking rod 9 on the side of the slider 7 away from the axis of the cover 2 to be inserted into the locking groove 10. At the same time, the clearance slots 17 on the cover 2 that correspond one-to-one with each support column 14 precisely engage with the support column 14 fixed on the upper end face of the retainer 1. The support column 14 passes through the clearance slots 17, completing the retention. The frame 1 and cover 2 are initially locked together; then the first copper busbar 15 is installed on the support column 14 to ensure the stability of the first copper busbar 15, and the second copper busbar 16 is installed on the outer circumference of the retainer 1, completing the connection between the first copper busbar 15 and the motor circuit board, and the second copper busbar 16 and the motor winding, respectively, to establish the current conduction path; when disassembly and maintenance are required, the adapter tool is inserted into the tool insertion slot 13 at the top of the rotating ring 1104, and the rotating tool drives the rotating ring 1104 to rotate around the axis of the cover 2. The rotating ring 1104 drives the connecting rod 1102 along the cover through each linkage plate 1103. 2. The movable through groove 1101 on the upper end face moves linearly. The lower end of the connecting rod 1102 is fixedly connected to the top of the slider 7, thereby driving the slider 7 to slide along the sliding rod 6 towards the axis of the cover 2. The slider 7 compresses the spring 8, causing the locking rod 9 to disengage from the locking groove 10, releasing the lock between the retainer 1 and the cover 2. Finally, the cover 2 is lifted upwards, causing the insert 4 to disengage from the slot 3. The flexible pad 12 is elastically reset. At this time, the first copper busbar 15, the second copper busbar 16, or other components can be maintained or replaced. After maintenance, the above assembly steps can be repeated to re-complete the installation of the motor busbar structure.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A motor busbar structure, comprising a cage (1), characterized in that, A cover (2) is provided above the retainer (1). Both the retainer (1) and the cover (2) are circular. The upper surface of the retainer (1) has several slots (3) arranged in a circular array. The lower surface of the cover (2) is fixedly connected to a plug (4) corresponding to each slot (3). The plug (4) and the slot (3) are fitted with a clearance. A cavity (5) is provided inside the plug (4). Two parallel sliding rods (6) are fixedly connected inside the cavity (5). The sliding rods (6) are perpendicular to the axis of the cover (2). A slider (7) is slidably connected to the upper part of the cover (2). A spring (8) is sleeved on the slider (6). One end of the spring (8) abuts against the side of the slider (7) near the axis of the cover (2), and the other end abuts against the side of the slot (3) near the axis of the cover (2). A locking rod (9) is fixedly connected to the middle of the side of the slider (7) away from the axis of the cover (2). A locking groove (10) adapted to the locking rod (9) is opened on the side wall of the slot (3). A synchronous drive assembly (11) is provided on the top of the cover (2) to drive each slider (7) to slide simultaneously on the slider (6).

2. The motor busbar structure according to claim 1, characterized in that, The bottom of the slot (3) is provided with a flexible pad (12), which is made of silicone rubber. When the insert (4) is inserted into the slot (3) and the bottom of the insert (4) is in contact with the flexible pad (12), the insert (4) is pressed to compress the flexible pad (12) and the locking rod (9) is aligned with the locking groove (10).

3. The motor busbar structure according to claim 1, characterized in that, The insertion end of the locking rod (9) and the inlet of the locking groove (10) are both rounded.

4. The motor busbar structure according to claim 1, characterized in that, The synchronous drive assembly (11) includes movable through slots (1101) formed on the upper end face of the cover (2) and corresponding one-to-one with the cavities (5) in each insert (4). Each movable through slot (1101) is connected to the corresponding cavity (5). A connecting rod (1102) is fixedly connected to the top of the slider (7) and moves within the movable through slot (1101). The top end of the connecting rod (1102) extends to the outside of the movable through slot (1101) and is rotatably connected to a linkage plate (1103). A rotating ring (110) is rotatably connected to the upper end face of the cover (2) and is coaxially arranged. 4) The end of each linkage plate (1103) away from the connecting rod (1102) is rotatably connected to the top of the rotating ring (1104). When the rotating ring (1104) rotates around the axis of the cover (2), the rotational motion is converted into the linear motion of the connecting rod (1102) along the movable through groove (1101) through the linkage plate (1103), thereby driving the slider (7) to slide on the slide rod (6). The length of each linkage plate (1103) is consistent, and the connection point with the rotating ring (1104) is evenly distributed along the circumference of the rotating ring (1104) to ensure that each slider (7) moves synchronously.

5. A motor bus structure according to claim 4, characterized in that, The rotating ring (1104) has a tool insertion slot (13) on its top.

6. The motor busbar structure according to claim 1, characterized in that, The upper end face of the retainer (1) is fixedly connected to a number of support columns (14) arranged in a ring array and the number of the number of slots (3) is the same. Each support column (14) is located in the middle of two adjacent slots (3). A first copper busbar (15) is provided on the support column (14). A number of second copper busbars (16) are provided on the outer circumferential surface of the retainer (1). The cover (2) is provided with clearance slots (17) that correspond one-to-one with each support column (14) and are adapted to it.

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