Flexible terminal structure capable of isolating vibration
By using a flexible terminal module to connect the PCB board and the pin terminal in the motor system, the problem of vibration transmission in the connection between the pin terminal and the PCB board is solved, and the effect of reducing noise and improving the comfort of the passenger compartment is achieved.
Patent Information
- Application Number
- CN202422026503.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-21
AI Technical Summary
In the prior art, there is a problem of vibration conduction in the connection between the pin terminal and the PCB board in the motor system, which leads to an increase in noise and affects the comfort of the passenger compartment.
A flexible terminal structure is adopted to isolate vibrations, including a flexible terminal module, a PCB board and a pin terminal. The flexible terminal module consists of a terminal body, an elastic arm assembly, a support arm and a avoidance groove. Through the design of the elastic arm assembly and a support arm, the terminal body can be freely moved and rotated, reducing vibration conduction.
It effectively reduces the conduction of vibration between the PCB board and the pin terminal, reduces the generation of noise, and improves the comfort of the passenger compartment and the subjective feeling of product use.
Smart Images
Figure CN223039176U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automotive motors, and particularly relates to a flexible terminal structure for isolating vibration. Background Art
[0002] With the development of new energy vehicles, the main engine factories have higher and higher requirements for the comfort of the passenger compartment. NVH (the English abbreviation of Noise, Vibration, and Harshness, meaning noise, vibration, and vibration and roughness) has become an important evaluation index for components. Especially the NVH of motors has become an important part of performance evaluation. This is a comprehensive issue for measuring the manufacturing quality of automobiles, and it gives the most direct and obvious feeling to automobile users.
[0003] Generally, the stator and rotor of a motor can weaken and eliminate vibration through vibration isolation structures such as rubber. The connection part between the controller and the motor is also an important path for vibration conduction. In the motor system structure, the pin terminal is on the motor body and is connected to the motor, which is the source of vibration and noise. The motor body can weaken or eliminate the transmission of vibration through the vibration isolation structure between the motor and the bracket. However, the PCB board is fixed on the bracket, flange, or shell. In order to ensure the transmission of electrical signals or current, it needs to be effectively connected to the motor pin terminal, which may become another path for vibration transmission. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a flexible terminal structure for isolating vibration, which can weaken the conduction of vibration between the PCB board and the pin terminal, reduce the generation of noise, and improve the subjective feeling of product use.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0006] A flexible terminal structure for isolating vibration, including a pin terminal, a PCB board, and a flexible terminal module installed on the PCB board. The flexible terminal module includes a terminal body at the central position. An elastic arm assembly extending outward in a winding shape is connected to the upper part of the terminal body. A support arm connected to the PCB board is arranged on the elastic arm assembly. One side of the support arm is located outside the elastic arm assembly, and the end of the pin terminal is embedded in the terminal body from the bottom.
[0007] Optionally, the terminal body includes a terminal front wall and a terminal rear wall arranged opposite to each other. One end near the inner side between the two is integrally formed and connected, and one end near the outer side is connected by a terminal side wall. The end of the pin terminal is embedded between the terminal front wall and the terminal rear wall.
[0008] Optionally, a spring tongue is connected to the top of the rear wall of the terminal. The spring tongue is bent downward from the inner side of the rear wall of the terminal, and the end of the spring tongue extends below the rear wall of the terminal. The end of the pin terminal is embedded between the spring tongue and the front wall of the terminal.
[0009] Optionally, the minimum distance between the spring tongue and the front wall of the terminal is less than the thickness of the end of the pin terminal.
[0010] Optionally, the bottom end of the front wall of the terminal is provided with a front wall guide that bends outward, and the end of the spring tongue is provided with a rear wall guide that folds outward. The front wall guide and the rear wall guide are opposite to each other to form a flared structure.
[0011] Optionally, upper and lower grooves are respectively provided at the upper and lower ends of the side wall of the terminal, upper and lower keys are provided at the side end of the front wall of the terminal, and the upper key is embedded in the upper groove, and the lower key is embedded in the lower groove.
[0012] Optionally, a clamp is provided at the end of the side wall of the terminal. The clamp is located between the upper groove and the lower groove, and the clamp is bent to cover the front wall of the terminal.
[0013] Optionally, the elastic arm assembly includes a first elastic arm, a second elastic arm and a third elastic arm connected in sequence. The first elastic arm is vertically connected to the upper part of the front wall of the terminal. The second elastic arm is vertically connected to the first elastic arm and the third elastic arm, and the third elastic arm is vertically connected to the support arm.
[0014] Optionally, a through hole for the terminal body to pass through is provided on the PCB board. Pad holes are provided on the periphery of the through hole. Welding feet corresponding to the number and position of the pad holes are provided at the bottom of the support arm, and the welding feet are inserted into the pad holes.
[0015] Optionally, the support arm is in a C-shaped structure, and an avoidance groove is provided between the elastic arm assembly and the support arm.
[0016] Beneficial effects
[0017] (1) In the present utility model, a flexible terminal module is used to connect the PCB board and the pin terminal. The elastic arm assembly extending outward in a winding shape can ensure that the terminal body can move and rotate freely in the horizontal direction, and there is also a certain space for movement and rotation in the vertical direction. The PCB board is connected through the support arm, and the pin terminal is connected to the terminal body. Through this structure, the conduction of vibration between the PCB board and the pin terminal can be weakened, the generation of noise can be reduced, and the subjective feeling of product use can be improved.
[0018] (2) In the present utility model, the front wall guide and the rear wall guide are flared in opposite directions to facilitate the insertion of the pin terminal into the terminal body of the flexible terminal module from bottom to top.
[0019] (3) In the present utility model, the cooperation of the upper key upper groove, the lower key lower groove and the clamp can ensure the strength of the terminal body of the flexible terminal module and ensure full contact between the two terminals. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a schematic structural view of the flexible terminal structure for isolating vibration according to an embodiment of the present utility model;
[0021] Figure 2 is a top view schematic structural view of the flexible terminal structure for isolating vibration according to an embodiment of the present utility model;
[0022] Figure 3 is Figure 2 a cross-sectional view of section A in
[0023] Figure 4 is a schematic structural view of the terminal module in an embodiment of the present utility model;
[0024] Figure 5 is a schematic structural view of the avoidance groove in an embodiment of the present utility model;
[0025] Figure 6 is a schematic structural view of the front wall guide and the rear wall guide in an embodiment of the present utility model;
[0026] Figure 7 is a schematic position structure view of the spring tongue and the terminal rear wall in an embodiment of the present utility model;
[0027] Figure 8 is a schematic structural view of the PCB board in an embodiment of the present utility model;
[0028] Figure 9 is a schematic structural view of the pin terminal in an embodiment of the present utility model;
[0029] Among them, 1. Flexible terminal module;
[0030] 10. Terminal body;
[0031] 11. Terminal front wall; 111. Upper key; 112. Lower key; 113. Front wall guide;
[0032] 12. Terminal side wall; 121. Upper groove; 122. Lower groove; 123. Clamp;
[0033] 13. Terminal rear wall; 131. Rear wall guide; 132. Spring tongue;
[0034] 20. Flexible arm assembly; 21. First flexible arm; 22. Second flexible arm; 23. Third flexible arm;
[0035] 30. Support arm; 31. Welding foot;
[0036] 40. Avoidance groove;
[0037] 2. PCB board; 201. Through hole; 202. Pad hole; 3. Pin terminal. Detailed implementation mode
[0038] Now, the present utility model will be further described in detail with reference to the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.
[0039] Embodiment 1
[0040] As Figures 1-7 , Figure 9 shown, a flexible terminal structure for isolating vibration includes a flexible terminal module 1, a PCB board 2, and a pin terminal 3. The flexible terminal module 1 is passed through the PCB board 2, and the pin terminal 3 is connected to the flexible terminal module 1. The flexible terminal module 1 mainly includes a terminal body 10, a flexible arm assembly 20, a support arm 30, and an avoidance groove 40, which together with the PCB board 2 and the pin terminal 3 form a vibration isolation structure. Through this structure, the conduction of vibration between the PCB board 2 and the pin terminal 3 can be weakened, the generation of noise can be reduced, and the subjective feeling of product use can be improved.
[0041] As described above, the terminal body 10 is located at the center of the overall structure. The end of the pin terminal 3 is embedded in the terminal body 10 from the bottom. The flexible arm assembly 20 extends outward in a coiled shape and is connected to the upper part of the terminal body 10. The lower end of the support arm 30 is connected to the PCB board 2, and the upper end is connected to the bottom of the flexible arm assembly 20. The flexible arm assembly 20 extending outward in a coiled shape can ensure that the terminal body 10 can move and rotate freely in the horizontal direction, and also has a certain amount of movement and rotation space in the vertical direction.
[0042] Specifically, the flexible arm assembly 20 includes a first flexible arm 21, a second flexible arm 22, and a third flexible arm 23 that are connected in sequence. The first flexible arm 21 is vertically connected to the upper part of the terminal body 10. The second flexible arm 22 is vertically connected to the first flexible arm 21 and the third flexible arm 23, and the third flexible arm 23 is vertically connected to the support arm 30; that is, centered on itself at the upper part of the terminal body 10, the first flexible arm 21, the second flexible arm 22, the third flexible arm 23, and the support arm 30 extend outward in a 90-degree coiled shape from the inside to the outside.
[0043] Further, the support arm 30 is in a C-shaped structure, and an avoidance groove 40 is formed between the elastic arm assembly 20 and the support arm 30, so that the elastic arm assembly 20 and the support arm 30 are locally connected, and one side of the support arm 30 is located outside the elastic arm assembly 20, facilitating better movement space for the terminal body 10 in this structure.
[0044] The terminal body 10 includes a terminal front wall 11 and a terminal rear wall 13 which are oppositely arranged. One end near the inner side between the two is integrally formed and connected, and the end near the outer side is connected by a terminal side wall 12. The upper part of the terminal front wall 11 protrudes and is perpendicularly connected to the first elastic arm 21, and the end of the pin terminal 3 is embedded between the terminal front wall 11 and the terminal rear wall 13.
[0045] To facilitate the connection between the pin terminal 3 and the terminal body 10, a spring tongue 132 is connected to the top of the terminal rear wall 13. The spring tongue 132 is bent downward from the inner side of the terminal rear wall 13, and the end of the spring tongue 132 extends below the terminal rear wall 13, and the end of the pin terminal 3 is embedded between the spring tongue 132 and the terminal front wall 11.
[0046] Specifically, the spring tongue 132 is bent downward from the top of the terminal rear wall 13 towards the inner side, and the minimum distance between the spring tongue 132 and the terminal front wall 11 is less than the thickness of the end of the pin terminal 3. That is, when the pin terminal 3 is inserted between the spring tongue 132 and the terminal front wall 11, the spring tongue 132 will elastically deform, storing elastic potential energy to firmly fix the pin terminal 3 inside the terminal body 10.
[0047] To facilitate the insertion of the pin terminal 3 into the terminal body 10, a front wall guide 113 that bends outward is provided at the bottom end of the terminal front wall 11, and a rear wall guide 131 that turns outward is provided at the end of the spring tongue 132, and the front wall guide 113 and the rear wall guide 131 are opposite to each other to form a flared structure. Through this structure, the pin terminal 3 can be conveniently inserted into the terminal body 10 of the flexible terminal module 1 from bottom to top.
[0048] Further, upper grooves 121 and lower grooves 122 are respectively provided at the upper and lower ends of the terminal side wall 12, upper keys 111 and lower keys 112 are respectively provided at the side ends of the terminal front wall 11 corresponding to the positions of the upper grooves 121 and the lower grooves 122, and the upper key 111 is embedded in the upper groove 121, and the lower key 112 is embedded in the lower groove 122. The cooperation between the upper key 111 and the upper groove 121, and the cooperation between the lower key 112 and the lower groove 122 can prevent the terminal side wall 12 from detaching from the terminal front wall 11 along its own direction.
[0049] A clamp 123 is provided at the end of the side wall 12 of the terminal. The clamp 123 is located between the upper groove 121 and the lower groove 122, and the clamp 123 is bent and covers the front wall 11 of the terminal. Its function is also to prevent the side wall 12 of the terminal from detaching from the front wall 11 of the terminal along its own direction. Acting together with the aforementioned structure, it can enhance the strength of the terminal body 10 after being matched with the pin terminal 3, and avoid damage to the terminal body 10 and affect the connection performance.
[0050] Embodiment 2
[0051] On the basis of Embodiment 1, the present invention also proposes a connection method between the support arm 30 and the PCB board 2.
[0052] As Figures 1-8 shown, a through hole 201 for the terminal body 10 to pass through is provided on the PCB board 2. Pad holes 202 are provided on the periphery of the through hole 201. Welding feet 31 corresponding to the number and position of the pad holes 202 are provided at the bottom of the support arm 30, and the welding feet 31 are inserted into the pad holes 202.
[0053] Here, three welding feet 31 are provided, which are distributed in a triangular pattern at the bottom of the support arm 30. After the three welding feet 31 pass through the pad holes 202 of the PCB board 2, they are tightly connected to the PCB board 2 by soldering.
[0054] In summary, the flexible terminal structure for isolating vibration proposed by the present invention uses the flexible terminal module 1 to connect the PCB board 2 and the pin terminal 3. The flexible terminal module 1 is composed of a terminal body 10, an elastic arm assembly 20, a support arm 30 and an avoidance groove 40. Moreover, an integral molding structure is adopted between the terminal body 10, the elastic arm assembly 20 and the support arm 30. Based on this, the elastic arm assembly 20 can ensure that the terminal body 10 can move and rotate freely in the horizontal direction, and also has a certain space for movement and rotation in the vertical direction. The support arm 30 is connected to the PCB board 2, and the pin terminal 3 is connected to the terminal body 10, which can weaken the conduction of vibration between the PCB board 2 and the pin terminal 3, reduce the generation of noise, and improve the subjective feeling of product use.
[0055] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.
[0056] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.
[0057] Based on the inspiration of the ideal embodiments of the present utility model, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.
Claims
1. A vibration-isolating flexible terminal structure, characterized in that: The invention comprises a pin terminal (3), a PCB board (2), and a flexible terminal module (1) mounted on the PCB board (2), wherein the flexible terminal module (1) comprises a terminal body (10) at a central position, the upper part of the terminal body (10) is connected to an elastic arm component (20) extending outward in a coiled shape, the elastic arm component (20) is provided with a support arm (30) connected to the PCB board (2), one side of the support arm (30) is located outside the elastic arm component (20), and the end of the pin terminal (3) is embedded in the terminal body (10) from the bottom.
2. The vibration-isolating flexible terminal structure according to claim 1, characterized in that: The terminal body (10) comprises a terminal front wall (11) and a terminal rear wall (13) which are arranged opposite to each other, the inner end of the two being connected by integral molding, and the outer end of the two being connected by a terminal side wall (12), and the end of the pin terminal (3) is embedded between the terminal front wall (11) and the terminal rear wall (13).
3. The vibration-isolating flexible terminal structure according to claim 2, characterized in that: The top of the terminal rear wall (13) is connected to a spring tongue (132), the spring tongue (132) is bent downward from the inner side of the terminal rear wall (13), the end of the spring tongue (132) extends below the terminal rear wall (13), and the end of the pin terminal (3) is embedded between the spring tongue (132) and the terminal front wall (11).
4. The vibration-isolating flexible terminal structure according to claim 3, characterized in that: The minimum distance between the spring tongue (132) and the terminal front wall (11) is less than the thickness of the end of the pin terminal (3).
5. The vibration-isolating flexible terminal structure according to claim 4, characterized in that: The bottom end of the terminal front wall (11) is provided with an outwardly bent front wall guide (113), the end of the spring tongue (132) is provided with an outwardly folded rear wall guide (131), and the front wall guide (113) and the rear wall guide (131) are arranged in a trumpet-shaped structure facing each other.
6. The vibration-isolating flexible terminal structure according to claim 5, characterized in that: An upper groove (121) and a lower groove (122) are respectively provided at the upper and lower ends of the terminal side wall (12), and an upper key (111) and a lower key (112) are provided at the side end of the terminal front wall (11), and the upper key (111) is embedded in the upper groove (121), and the lower key (112) is embedded in the lower groove (122).
7. The vibration-isolating flexible terminal structure according to claim 6, characterized in that: A clamp (123) is provided at the end of the terminal side wall (12); the clamp (123) is located between the upper groove (121) and the lower groove (122), and the clamp (123) is bent and covers the terminal front wall (11).
8. The vibration-isolating flexible terminal structure according to claim 2, characterized in that: The elastic arm assembly (20) comprises a first elastic arm (21), a second elastic arm (22) and a third elastic arm (23) which are connected in sequence, wherein the first elastic arm (21) is vertically connected to the upper portion of the terminal front wall (11), the second elastic arm (22) is vertically connected to the first elastic arm (21) and the third elastic arm (23), and the third elastic arm (23) is vertically connected to the support arm (30).
9. The vibration-isolating flexible terminal structure according to claim 8, characterized in that: The PCB board (2) is provided with a through hole (201) for the terminal body (10) to pass through, and a soldering pad hole (202) is provided around the through hole (201). The bottom of the support arm (30) is provided with solder feet (31) corresponding to the number and position of the soldering pad holes (202), and the solder feet (31) are inserted into the soldering pad holes (202).
10. The vibration-isolating flexible terminal structure according to claim 9, characterized in that: The support arm (30) is in a C-shaped structure, and an avoidance groove (40) is provided between the elastic arm assembly (20) and the support arm (30).