Anti-breaking elastic buffer type motor terminal

Abstract

The utility model relates to permanent magnet synchronous motor technical field especially relates to a kind of anti-fracture elastic buffer type motor terminal, comprising: straight insertion piece pin, elastic buffer structure and crimping cavity, the bottom of straight insertion piece pin is connected with the one end of elastic buffer structure, the other end of elastic buffer structure is connected with the top of crimping cavity, the inner wall lower part of crimping cavity is provided with anti-withdrawal boss, anti-withdrawal boss center is provided with wire inlet, the inner wall upper part of crimping cavity is provided with grid recess.The utility model is added elastic buffer structure between straight insertion piece type pin and the crimping cavity of lead-out wire, release and isolation of temperature or vibration stress are realized, block mechanical stress conduction to straight insertion piece pin, fundamentally solve the problem of pin root fracture failure caused by vibration of traditional terminal.By adopting the structure that anti-withdrawal boss and net-shaped recess cooperate, make motor lead-out line end and wiring terminal connection more stable, not easy to loosen, have better conductive effect.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet synchronous motor technology, and in particular to a fracture-resistant elastic buffer motor terminal. Background Technology

[0002] In new energy vehicles, the motor and electronic control system are typically electrically connected via motor terminals. Specifically, one end of the motor terminal is soldered to the circuit PCB control board, and the other end is connected to the motor's lead wires. However, during motor operation, due to constantly changing electromagnetic forces and shaft imbalances, the motor system generates continuous vibrations, resulting in periodic mechanical stress on the motor terminals. Over time, this can lead to: 1) loosening of the solder joints at the motor lead wires; and 2) fatigue fracture of the motor terminals, ultimately causing motor failure and directly affecting the system's reliability and lifespan.

[0003] There is a plug-in type motor terminal block structure as follows: Figure 1 As shown, the PCB board soldering pins are through-hole type, with the root directly connected to the open crimp cavity. It lacks stress buffering and release area. During motor operation, temperature or vibration stress is directly transmitted to the solder joint on the PCB board, which can easily cause the root of the through-hole pin to break, motor failure, or even vehicle fire. Summary of the Invention

[0004] This invention provides a fracture-resistant elastic buffer type motor terminal block to solve two common faults in the background art: fatigue fracture of motor terminal blocks and loosening of motor lead wire solder joints.

[0005] The technical solution of this utility model is as follows: a breakage-resistant elastic buffer motor terminal block, comprising: a straight insert pin, an elastic buffer structure, and a crimping cavity. The bottom of the straight insert pin is connected to one end of the elastic buffer structure, and the other end of the elastic buffer structure is connected to the top of the crimping cavity. An anti-removal boss is provided on the lower part of the inner wall of the crimping cavity, and a wire inlet is provided at the center of the anti-removal boss. A mesh groove is provided on the upper part of the inner wall of the crimping cavity.

[0006] Furthermore, the through-hole pin includes a through-hole, the bottom of which is connected to the elastic buffer structure, and the top of which is provided with a PCB board guide chamfer.

[0007] Furthermore, the inner surface of the straight insert has multiple horizontal grooves evenly distributed.

[0008] Furthermore, the elastic buffer structure includes: a primary buffer component and a secondary buffer component, one end of the primary buffer component is connected to a through-hole pin, the other end of the primary buffer component is connected to one end of the secondary buffer component, and the other end of the secondary buffer component is connected to a crimping cavity.

[0009] Furthermore, the primary buffer component includes: a first straight line segment, a first semicircular arc, a second straight line segment, and a second semicircular arc. One end of the first straight line segment is connected to the through-hole pin, the other end of the first straight line segment is connected to one end of the first semicircular arc, the other end of the first semicircular arc is connected to one end of the second straight line segment, the other end of the second straight line segment is connected to one end of the second semicircular arc, and the other end of the second semicircular arc is connected to the secondary buffer component.

[0010] Furthermore, the first line segment and the second line segment are parallel to each other.

[0011] Furthermore, the first and second semicircular arcs have the same radius and curvature.

[0012] Furthermore, the secondary buffer assembly includes: a third straight segment, a third semicircular arc, a fourth straight segment, a fourth semicircular arc, and a fifth straight segment. One end of the third straight segment is connected to the primary buffer assembly, the other end of the third straight segment is connected to one end of the third semicircular arc, the other end of the third semicircular arc is connected to one end of the fourth straight segment, the other end of the fourth straight segment is connected to one end of the fourth semicircular arc, the other end of the fourth semicircular arc is connected to one end of the fifth straight segment, and the other end of the fifth straight segment is connected to the pressing cavity.

[0013] Furthermore, the third, fourth, and fifth line segments are parallel to each other.

[0014] Furthermore, the radii and curvatures of the third and fourth semicircular arcs are equal.

[0015] The beneficial effects of this utility model are as follows: By adding an elastic buffer structure between the crimp cavity of the through-hole type pin and the lead wire, this utility model achieves the release and isolation of temperature or vibration stress, blocking the transmission of mechanical stress to the through-hole pin, and fundamentally solving the problem of pin root breakage failure caused by vibration in traditional terminals. The structure using an anti-removal boss and a mesh groove makes the connection between the motor lead wire end and the terminal more stable, less prone to loosening, and provides better conductivity.

[0016] This invention adds an elastic buffer structure between the through-hole pins and the lead crimping cavity, forming a stress buffer and release area. This effectively absorbs temperature or vibration stress, preventing stress from being directly transmitted to the through-hole pins and solder joints. To a certain extent, it enhances the flexibility of the through-hole pins and crimping cavity, absorbing vibrations in multiple directions such as axial and radial, changing the unidirectional force distribution of traditional terminals, and improving the vibration resistance of the connection and the reliability of motor operation.

[0017] This invention employs a structure that combines an anti-removal boss and a mesh groove, making the connection between the motor lead wire and the terminal block more stable, less prone to loosening, and providing better conductivity. Attached Figure Description

[0018] Figure 1 Schematic diagram of existing terminal block structure.

[0019] Figure 2 Schematic diagram of the structure of a new type of flexible buffer motor terminal block.

[0020] Figure 3 Schematic diagram of the structure of the new type of flexible buffer motor terminal block.

[0021] Figure 4 Schematic diagram of a new type of elastic buffer motor terminal buffer structure.

[0022] Figure 5 Cross-sectional view of the structure of a novel elastic buffer motor terminal block.

[0023] Figure 6 Bottom view of the new type of flexible buffer motor terminal block. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] In the technical solution of this utility model, Figure 2 This is a structural diagram illustrating the specific structure of a fracture-resistant elastic buffer motor terminal according to this utility model, as shown below. Figure 2 As shown, this utility model includes:

[0026] The device comprises a through-hole pin 1, an elastic buffer structure 2, and a crimping cavity 3. The bottom of the through-hole pin 1 is connected to one end of the elastic buffer structure 2, and the other end of the elastic buffer structure 2 is connected to the top of the crimping cavity 3. The through-hole pin 1 is used to connect to the PCB board insertion slot, the crimping cavity 3 is used for conductive connection with the motor lead wire, and the elastic structure 2 is located between the through-hole pin 1 and the crimping cavity 3, its function being to effectively release and isolate stress caused by temperature changes or vibration.

[0027] like Figure 5 and Figure 6 As shown, the lower part of the inner wall of the crimping cavity 3 is provided with an anti-retraction boss 17, the center of the anti-retraction boss 17 is provided with a wire inlet 19, and the upper part of the inner wall of the crimping cavity 3 is provided with a mesh groove 18.

[0028] The crimping cavity 3 comprises four parts: a crimping cavity wall 16, an anti-retraction boss 17, a mesh groove 18, and a cable inlet 19. The crimping cavity 3 has an overall open cylindrical structure. An anti-retraction boss 17 is located at the lower part of the crimping cavity wall 16, resulting in a narrower bottom and wider top structure within the crimping cavity 3. A circular cable inlet 19 is located in the center of the anti-retraction boss 17. The motor lead wire is inserted into the crimping cavity through the cable inlet 19. The crimping cavity is the space enclosed by the crimping cavity wall 16 and the anti-retraction boss 17. Mesh grooves 18 are evenly distributed around the upper perimeter of the inner wall of the crimping cavity wall 16. The function of the anti-retraction boss 17 is to ensure that after the motor lead wire is inserted, it can only move in one direction within the crimping cavity 3, making it easy for the lead wire to enter but difficult to exit. Under the action of solder solidification, a mechanical limiting function is achieved. The grid grooves 18 are evenly distributed around the crimping cavity wall 16. The grooves are grid-shaped, which increases the contact area between the wire and the crimping cavity, so that the connection can withstand multi-directional torque without loosening, and enhances its conductivity. The material of the entire motor terminal can be copper or aluminum.

[0029] In one embodiment of this utility model, such as Figure 3 As shown, the through-hole pin 1 includes a through-hole 5, the bottom of which is connected to the elastic buffer structure 2, and the top of which is provided with a PCB board guide chamfer 4. Multiple horizontal grooves 6 are evenly distributed on the inner surface of the through-hole 5.

[0030] The through-hole pin 1 includes a PCB board guide chamfer 4, a through-hole 5, and horizontal grooves 6. The through-hole 5 has a rectangular overall shape. At the upper end of the through-hole 5, two 1 / 4 arc-shaped PCB board guide chamfers 4 are symmetrically distributed along its central axis for guiding and positioning the terminal block when it is inserted into the PCB board. Multiple horizontal grooves 6 are evenly distributed on the inner side of the through-hole 5. The horizontal grooves 6 increase the contact surface area with solder, improving the mechanical reliability and electrical conductivity of the connection between the terminal block and the PCB board.

[0031] like Figure 4 As shown, the elastic buffer structure 2 includes a primary buffer component and a secondary buffer component. One end of the primary buffer component is connected to the through-hole pin 1, the other end of the primary buffer component is connected to one end of the secondary buffer component, and the other end of the secondary buffer component is connected to the crimping cavity 3.

[0032] The primary buffer assembly includes: a first straight line segment 7, a first semicircular arc 8, a second straight line segment 9, and a second semicircular arc 10. One end of the first straight line segment 7 is connected to the through-hole pin 1, and the other end of the first straight line segment 7 is connected to one end of the first semicircular arc 8. The other end of the first semicircular arc 8 is connected to one end of the second straight line segment 9, and the other end of the second straight line segment 9 is connected to one end of the second semicircular arc 10. The other end of the second semicircular arc 10 is connected to the secondary buffer assembly. The first straight line segment 7 and the second straight line segment 9 are parallel to each other. The radius and curvature of the first semicircular arc 8 and the second semicircular arc 10 are equal.

[0033] The secondary buffer assembly includes: a third straight segment 11, a third semicircular arc 12, a fourth straight segment 13, a fourth semicircular arc 14, and a fifth straight segment 15. One end of the third straight segment 11 is connected to the primary buffer assembly, and the other end of the third straight segment 11 is connected to one end of the third semicircular arc 12. The other end of the third semicircular arc 12 is connected to one end of the fourth straight segment 13, the other end of the fourth straight segment 13 is connected to one end of the fourth semicircular arc 14, the other end of the fourth semicircular arc 14 is connected to one end of the fifth straight segment 15, and the other end of the fifth straight segment 15 is connected to the pressing cavity 3. The third straight segment 11, the fourth straight segment 13, and the fifth straight segment 15 are parallel to each other. The radii and curvatures of the third semicircular arc 12 and the fourth semicircular arc 14 are equal.

[0034] The elastic buffer structure 2 consists of a primary buffer component and a secondary buffer component connected in series. The primary buffer component is formed by sequentially connecting a first straight line segment 7, a first semicircular arc 8 (radius R1, which is half the sum of the inner and outer radii), a second straight line segment 9, and a reversed second semicircular arc 10 (radius R2). R1 ​​= R2, and both semicircles are 180°. The upper end of the first straight line segment 7 is connected to the through-hole pin 1. The right end of the reversed second semicircular arc 10 is connected to the secondary buffer component. The secondary buffer component is formed by sequentially connecting a third straight line segment 11, a third semicircular arc 12 (radius R3), a fourth straight line segment 13, a reversed fourth semicircular arc 14 (radius R4), and a fifth straight line segment 15. R3 = R4, and both semicircles are 180°. The curvature and radius of R1 and R2 in the primary buffer component and R3 and R4 in the secondary buffer component can be equal or unequal to achieve flexible adjustment of the curvature and stiffness of the overall buffer structure. The lower end of the fifth straight segment 15 is connected to the crimping cavity 3.

[0035] This utility model patent introduces an elastic buffer structure into the through-hole pins and the crimping cavity. This structure effectively absorbs and buffers the energy from temperature changes and vibrations generated during motor operation, preventing temperature or vibration stress from being directly transmitted to the through-hole pins and causing breakage at the pin root. Simultaneously, the crimping cavity incorporates an anti-removal boss and a mesh-type groove, enhancing the mechanical connection stability between the motor lead and the terminal block, effectively preventing lead loosening and improving the reliability of conductive contact.

[0036] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A break-resistant elastic buffer type motor terminal block, characterized in that, include: The device comprises a through-hole pin (1), an elastic buffer structure (2), and a crimping cavity (3). The bottom of the through-hole pin (1) is connected to one end of the elastic buffer structure (2), and the other end of the elastic buffer structure (2) is connected to the top of the crimping cavity (3). The lower part of the inner wall of the crimping cavity (3) is provided with an anti-removal boss (17), and the center of the anti-removal boss (17) is provided with a wire inlet (19). The upper part of the inner wall of the crimping cavity (3) is provided with a mesh groove (18).

2. The anti-breakage elastic buffer motor terminal as described in claim 1, characterized in that, The through-hole pin (1) includes a through-hole (5), the bottom of which is connected to the elastic buffer structure (2), and the top of which is provided with a PCB board guide chamfer (4).

3. The anti-breakage elastic buffer motor terminal as described in claim 2, characterized in that, The inner surface of the straight insert (5) is provided with a plurality of horizontal grooves (6) at equal intervals.

4. The anti-breakage elastic buffer motor terminal as described in claim 1, characterized in that, The elastic buffer structure (2) includes: a primary buffer component and a secondary buffer component. One end of the primary buffer component is connected to the through-hole pin (1), the other end of the primary buffer component is connected to one end of the secondary buffer component, and the other end of the secondary buffer component is connected to the crimping cavity (3).

5. The anti-breakage elastic buffer motor terminal as described in claim 4, characterized in that, The primary buffer component includes: a first straight segment (7), a first semicircular arc (8), a second straight segment (9), and a second semicircular arc (10). One end of the first straight segment (7) is connected to the through-hole pin (1), the other end of the first straight segment (7) is connected to one end of the first semicircular arc (8), the other end of the first semicircular arc (8) is connected to one end of the second straight segment (9), the other end of the second straight segment (9) is connected to one end of the second semicircular arc (10), and the other end of the second semicircular arc (10) is connected to the secondary buffer component.

6. The anti-breakage elastic buffer motor terminal as described in claim 5, characterized in that, The first straight line segment (7) and the second straight line segment (9) are parallel to each other.

7. The anti-breakage elastic buffer motor terminal as described in claim 5, characterized in that, The first semicircular arc (8) and the second semicircular arc (10) have the same radius and curvature.

8. The anti-breakage elastic buffer motor terminal as described in claim 4, characterized in that, The secondary buffer assembly includes: a third straight segment (11), a third semicircular arc (12), a fourth straight segment (13), a fourth semicircular arc (14), and a fifth straight segment (15). One end of the third straight segment (11) is connected to the primary buffer assembly, and the other end of the third straight segment (11) is connected to one end of the third semicircular arc (12). The other end of the third semicircular arc (12) is connected to one end of the fourth straight segment (13), and the other end of the fourth straight segment (13) is connected to one end of the fourth semicircular arc (14). The other end of the fourth semicircular arc (14) is connected to one end of the fifth straight segment (15), and the other end of the fifth straight segment (15) is connected to the crimping cavity (3).

9. The anti-breakage elastic buffer motor terminal as described in claim 4, characterized in that, The third line segment (11), the fourth line segment (13), and the fifth line segment (15) are parallel to each other.

10. The anti-breakage elastic buffer motor terminal as described in claim 4, characterized in that, The radii and curvatures of the third semicircular arc (12) and the fourth semicircular arc (14) are equal.

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