Fixture for tensile testing of automotive connectors

Abstract

This utility model discloses a fixture for tensile testing of automotive connectors, including a clamping base, a clamping mechanism disposed on the clamping base, and a connecting rod. The clamping mechanism is used to clamp the automotive connector, and the connecting rod is used to connect to a tensile testing machine. The clamping base is provided with an arc-shaped guide portion extending circumferentially, and the connecting rod is slidable along the arc-shaped guide portion and can be locked onto the arc-shaped guide portion. After the automotive connector is clamped and fixed, the fixture for tensile testing of automotive connectors provided by this utility model can adjust the pull-out direction of the terminal or wire to be consistent with the tensile force applied by the tensile testing machine by rotating and moving the position of the clamping base relative to the connecting rod, thereby adapting to the testing requirements of connectors with different angles, reducing test preparation time, and reducing equipment costs.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive parts testing devices, specifically to a fixture for testing the tensile strength of automotive connectors. Background Technology

[0002] Pull force testing of automotive connectors is a key test item for evaluating the mechanical performance of electrical connectors, mainly detecting the connection strength and reliability between terminals and wires, and between terminals and the connector's plastic housing. During testing, a special fixture is needed to fix the automotive connector housing so that the pull force testing equipment can apply axial tensile force along the pull direction of the terminals or wires. Traditional test fixtures have significant limitations: firstly, the fixed connector can only be tested in a specific direction; for angled connectors, special jaws must be changed to complete the fixation; secondly, different angled connectors require different special fixtures, which not only increases test preparation time and reduces test efficiency but also significantly increases equipment investment costs. To address these issues, there is an urgent need to develop a new type of test fixture that can adapt to the testing requirements of connectors with different angles, thereby reducing test preparation time and lowering equipment costs. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a fixture for tensile testing of automotive connectors, which can adapt to the testing requirements of connectors with different angles, reduce test preparation time, and reduce equipment costs.

[0004] To achieve the above objectives, the present invention provides the following technical solution: including a clamping seat, a clamping mechanism disposed on the clamping seat, and a connecting rod, wherein the clamping mechanism is used to clamp an automotive connector, and the connecting rod is used to connect to a tensile testing machine; the clamping seat is provided with an arc-shaped guide portion extending along its own circumference, and the connecting rod is slidable along the arc-shaped guide portion and can be locked onto the arc-shaped guide portion.

[0005] Furthermore, the clamping mechanism includes: a first clamping block, detachably connected to the clamping seat; and a second clamping block, slidably and lockably disposed on the clamping seat, with the second clamping block and the first clamping block disposed opposite to each other, forming a clamping space for clamping the automotive connector between the second clamping block and the first clamping block.

[0006] Furthermore, the clamping seat is provided with a receiving groove for accommodating the first clamping block and the second clamping block, and the first clamping block and the second clamping block are located in the receiving groove.

[0007] Furthermore, the clamping mechanism also includes a locking screw, which is threadedly connected to the clamping seat; one end of the locking screw abuts against the second clamping block and is used to push the second clamping block toward the first clamping block.

[0008] Furthermore, a receiving groove cover plate is detachably connected to the clamping seat, and the receiving groove cover plate seals the first clamping block and the second clamping block in the receiving groove; the bottom opening of the receiving groove is used to allow the automotive connector to be inserted into the clamping space formed by the second clamping block and the first clamping block through the opening.

[0009] Furthermore, the bottom of the receiving groove is provided with a guide groove; the second clamping block includes a limiting slider and a clamping block detachably connected to the limiting slider. The limiting slider is slidably fitted in the guide groove, and the clamping block is used to cooperate with the first clamping block to lock the automotive connector.

[0010] Furthermore, the first clamping block is a wedge-shaped block, and the first clamping block is tightened and attached to the side wall of the receiving groove by a first tension spring.

[0011] Furthermore, the clamping block is a wedge-shaped block, and the clamping block is tightened and attached to the side wall of the limiting slider and the receiving groove by the second tension spring.

[0012] Furthermore, the clamp is detachably and fixedly connected with a first arc-shaped guide plate and a second arc-shaped guide plate arranged in parallel. The arc-shaped guide portion is an arc-shaped sliding groove formed between the first arc-shaped guide plate, the second arc-shaped guide plate and the clamp. The bottom of the connecting rod is provided with an arc-shaped sliding plate that is slidably fitted in the arc-shaped sliding groove.

[0013] Furthermore, the first arc-shaped guide plate has a first baffle extending towards the side of the second arc-shaped guide plate along its radial outer edge, and the second arc-shaped guide plate has a second baffle extending towards the side of the first arc-shaped guide plate along its radial outer edge; a locking nut is threaded onto the connecting rod, and after the locking nut is tightened, the arc-shaped sliding plate cooperates with the locking nut to clamp onto the first baffle and the second baffle.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model provides a fixture for tensile testing of automotive connectors, which can adapt to the testing requirements of connectors with different angles, reducing test preparation time and lowering equipment costs. Specifically, the clamping mechanism on the clamp seat secures the automotive connector, while the connecting rod allows the clamp seat to be mounted onto the tensile testing machine. For angled connectors, after clamping, the position of the connector relative to the connecting rod can be adjusted by rotating the clamp seat, aligning the pull-out direction of the terminals or wires with the direction of the tensile force applied by the tensile testing machine, thus ensuring the accuracy of the test results. No additional dedicated fixtures are required, reducing test preparation time and improving testing efficiency. Furthermore, the fixture's versatility is increased, reducing the number of dedicated fixtures and thus lowering equipment costs.

[0016] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0017] Figure 1 This is a partial cross-sectional view of the present invention after the cover plate of the receiving groove has been removed;

[0018] Figure 2 This is an isometric structural diagram of the present invention after the cover plate of the receiving groove has been removed;

[0019] Figure 3 This is a schematic diagram of the isometric structure of this utility model from one perspective;

[0020] Figure 4 This is an isometric structural schematic diagram of the present invention from another perspective.

[0021] Reference numerals: 1-clamping seat; 101-accommodating groove; 101a-guide groove; 102-arc-shaped slide groove; 103-first arc-shaped guide plate; 103a-first baffle; 104-second arc-shaped guide plate; 104a-second baffle; 2-clamping mechanism; 201-first clamping block; 202-second clamping block; 2021-limiting slider; 2022-clamping block; 203-locking screw; 3-connecting rod; 301-arc-shaped sliding plate; 302-locking nut; 4-accommodating groove cover plate; 5-first tension spring; 6-second tension spring. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only for illustrating the basic concept of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. In the description of this embodiment, the terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0023] Please see Figure 1-4This embodiment discloses a fixture for tensile testing of automotive connectors, including a clamping base 1, a clamping mechanism 2 disposed on the clamping base 1, and a connecting rod 3. The clamping mechanism 2 is used to clamp the automotive connector. The clamping base 1 is provided with an arc-shaped guide portion extending circumferentially. The connecting rod 3 is slidable along the arc-shaped guide portion and is locked to the arc-shaped guide portion. Specifically, the clamping base 1 can be made of metal or high-strength plastic, and its shape is preferably an arc-shaped plate or semi-circular plate structure. An arc-shaped groove 102 is disposed on the outer circumferential surface of the clamping base 1. The clamping mechanism 2 preferably adopts a pair of opposing clamping blocks, one of which is fixed and the other is slidable, and clamping and loosening are achieved by an adjustment mechanism. The arc-shaped guide portion can be an arc-shaped guide rail or a groove structure. The connecting rod 3 is preferably locked by bolts and / or nuts. It is understood that the connection method between the connecting rod 3 and the tensile testing machine includes, but is not limited to, screw connection, snap connection, etc. In this embodiment, after the connecting rod 3 is inserted into the connecting hole on the crossbeam of the tensile testing machine, it is locked with a cylindrical pin, and the connecting rod 3 is locked to the crossbeam of the tensile testing machine by a nut provided on the connecting rod 3. Here, the connecting rod 3 is preferably arranged radially along the arc-shaped guide to facilitate connection with the tensile testing machine. It is understood that commonly used tensile testing machines usually apply tensile force in the vertical direction. After the connecting rod 3 is installed on the tensile testing machine, it is arranged vertically. For automotive connectors with angles (after the automotive connector is clamped, the pull direction of the terminal or wire is not in the vertical direction), the testing direction of the automotive connector can be changed to the vertical direction by rotating the clamp 1.

[0024] The fixture in the above structure is designed with a sliding and locking connecting rod 3 on the arc-shaped guide. After the automotive connector is clamped and fixed, the position of the automotive connector relative to the connecting rod 3 can be adjusted by rotating the movable clamp 1. This adjusts the pull-out direction of the terminal or wire to be consistent with the direction of the tensile force applied by the tensile testing machine, thereby ensuring the accuracy of the test results and adapting to the testing requirements of connectors with different angles. There is no need to replace additional special fixtures, reducing test preparation time and thus improving testing efficiency. The fixture's versatility is improved, reducing the number of special fixtures and thus reducing equipment costs.

[0025] In this embodiment, the clamping mechanism 2 includes a first clamping block 201 and a second clamping block 202. The first clamping block 201 is detachably connected to the clamping seat 1. The second clamping block 202 is slidably and lockably disposed on the clamping seat 1, and the second clamping block 202 is disposed opposite to the first clamping block 201, forming a clamping space for clamping the automotive connector between the second clamping block 202 and the first clamping block 201. Specifically, the first clamping block 201 can be rigidly connected to the clamping seat 1 by welding or bolting. The sliding function of the second clamping block 202 can be achieved by setting a linear guide or dovetail groove structure on the clamping seat 1, and the locking function can be completed by tightening a set screw or a pin positioning mechanism. The width of the clamping space can be adaptively changed by adjusting the position of the second clamping block 202. For example, when testing connectors of different sizes, the operator can first loosen the locking mechanism, move the second clamping block 202 to a suitable distance, and then relock it. Thus, this technical solution, by setting an adjustable double clamping block structure, can adapt to the clamping requirements of automotive connectors of different specifications. Meanwhile, because the position of the second clamping block 202 can be precisely adjusted, it ensures that the connector is subjected to uniform force during clamping, avoiding test data deviations caused by improper clamping. In practice, the operator only needs to adjust the position of the second clamping block 202 according to the connector size and lock it to quickly complete the clamping preparation. The entire process can be completed without auxiliary tools.

[0026] In this embodiment, the clamping base 1 is provided with a receiving groove 101 for accommodating the first clamping block 201 and the second clamping block 202, which are located within the receiving groove 101. Specifically, the receiving groove 101 is a recessed structure on the clamping base 1, the size of which matches the dimensions of the first clamping block 201 and the second clamping block 202, allowing the two clamping blocks to be stably placed within the groove. The receiving groove 101 can be formed by milling. Thus, by setting a dedicated receiving groove 101 structure, the core component of the clamping mechanism 2 is integrated and packaged. This design ensures that the clamping blocks remain precisely aligned during operation, avoiding the skewing problem that is prone to occur in traditional open clamps. Compared with the prior art, the receiving groove 101 structure not only simplifies the assembly process, but more importantly, it ensures the uniform transmission of clamping force through physical limiting, thereby significantly improving clamping reliability.

[0027] In this embodiment, the clamping mechanism 2 further includes a locking screw 203, which is threadedly connected to the clamping seat 1. One end of the locking screw 203 abuts against the second clamping block 202, pushing the second clamping block 202 toward the first clamping block 201. Specifically, the locking screw 203 is installed in the threaded hole of the clamping seat 1 through a threaded engagement. When the locking screw 203 is rotated, its axial displacement can precisely control the movement distance of the second clamping block 202. In a preferred embodiment, the outer end of the locking screw 203 can be equipped with a knob or hexagonal head for easy manual operation. Thus, this technical solution achieves precise fine-tuning of the position of the second clamping block 202 through a threaded transmission mechanism, solving the problem that traditional clamps cannot flexibly adapt to connectors of different sizes. When the locking screw 203 is rotated, the second clamping block 202 is linearly pushed, thereby changing the size of the clamping space and thus stably clamping the housing of the automotive connector. While maintaining a simple structure, this design ensures controllable clamping force and enables rapid adaptation to connectors of different specifications, effectively improving testing efficiency and reducing equipment costs.

[0028] In this embodiment, a receiving groove cover plate 4 is detachably connected to the clamping seat 1. The receiving groove cover plate 4 seals the first clamping block 201 and the second clamping block 202 within the receiving groove 101. The bottom opening of the receiving groove 101 allows the automotive connector to be inserted into the clamping space formed by the second clamping block 202 and the first clamping block 201. Specifically, the receiving groove cover plate 4 is detachably connected to the clamping seat 1 via screws. The material of the receiving groove cover plate 4 can be metal or high-strength plastic, and its size matches the opening of the receiving groove 101 to ensure complete coverage. It should be noted that the "bottom" of the receiving groove 101 refers to the bottom opening. Figure 1 The bottom view is shown. This technical solution, by setting a removable receiving slot cover plate 4, not only protects the clamping mechanism 2, but also facilitates the operator to quickly insert the connector to be tested from the bottom opening. The removable design of the receiving slot cover plate 4 facilitates maintenance and replacement of worn parts, while the bottom opening structure optimizes the testing process, allowing sample loading to be completed without removing the receiving slot cover plate 4.

[0029] In this embodiment, the bottom of the receiving groove 101 is provided with a guide groove 101a; the second clamping block 202 includes a limiting slider 2021 and a clamping block 2022 detachably connected to the limiting slider 2021. The limiting slider 2021 is slidably fitted in the guide groove 101a, and the clamping block 2022 is used to cooperate with the first clamping block 201 to lock the automotive connector. Specifically, the guide groove 101a can adopt a T-slot or dovetail groove structure to limit the limiting slider 2021 to slide only in a single direction. The fitting gap between the limiting slider 2021 and the guide groove 101a can be controlled within the range of 0.05-0.1mm to ensure smooth sliding and no radial wobble. The clamping block 2022 can be detachably connected to the limiting slider 2021 via bolts or quick-release pins, facilitating the replacement of the clamping block 2022 with a suitable one for different connector specifications; or facilitating the individual replacement of the clamping block 2022 after it wears out. As a preferred embodiment, the working surface of the clamping block 2022 can be provided with anti-slip textures or a rubber pad to increase friction with the connector housing. Thus, through the cooperation structure between the guide groove 101a and the limiting slider 2021, the movement trajectory of the second clamping block 202 can be precisely controlled, preventing skewing during clamping. The detachable clamping block 2022 design allows the fixture to quickly adapt to connectors of different sizes and shapes without requiring a complete replacement of the fixture components.

[0030] In this embodiment, the first clamping block 201 is a wedge-shaped block, and the first clamping block 201 is tightened and adhered to the side wall of the receiving groove 101 by the first tension spring 5. Specifically, the first tension spring 5 is a helical tension spring, with one end hooked onto the clamping seat 1 and the other end hooked onto the first clamping block 201. The tension of the first tension spring 5 causes the first clamping block 201 to adhere to the side wall of the receiving groove 101. More specifically, mounting grooves for arranging the first tension spring 5 are provided at corresponding positions of the first clamping block 201 and the clamping seat 1. The first tension spring 5 is located in the mounting groove, and after the receiving groove cover plate 4 is installed, the first tension spring 5 is covered. See also Figure 1 The inclined surface of the wedge-shaped block fits against the right side wall of the receiving groove 101. Therefore, the first tension spring 5 prevents the first clamping block 201 from sliding out of the bottom opening of the receiving groove 101 when the connector is not clamped. The wedge-shaped block's structural design ensures that during testing, the wedge-shaped block receives an upward force from the right side wall of the receiving groove 101, effectively preventing the first clamping block 201 from being pulled off and ensuring the stability of the connector clamping. Furthermore, the use of a tension spring for installing the first clamping block 201 facilitates easy installation and removal; simply removing the first tension spring 5 allows for easy removal of the first clamping block 201.

[0031] In this embodiment, the clamping block 2022 is a wedge-shaped block, and the clamping block 2022 is tightened and adhered to the side wall of the limiting slider 2021 and the receiving groove 101 by the second tension spring 6. For details, see... Figure 1 The limiting slider 2021 is provided with a mating inclined surface that engages with the inclined surface of the wedge block. Here, the second tension spring 6 is a helical tension spring. One end of the second tension spring 6 is hooked onto the limiting slider 2021, and the other end is hooked onto the clamping block 2022. The tension force of the second tension spring 6 causes the first clamping block 201 to adhere to the mating inclined surface of the limiting slider 2021 and the upper side wall of the receiving groove 101. Thus, by setting the second tension spring 6, the clamping block 2022 can be prevented from sliding out of the bottom opening of the receiving groove 101 when the connector is not clamped. The structural design of the wedge block ensures that during the test, the wedge block is subjected to an upward component force from the limiting slider 2021, which can effectively prevent the clamping block 2022 from being pulled out, thus ensuring the clamping stability of the connector. At the same time, the use of a tension spring to install the clamping block 2022 makes it easy to install and remove. When replacing, the clamping block 2022 can be removed by simply removing the second tension spring 6. In addition, the double wedge block structure design of the first clamping block 201 and the clamping block 2022 ensures that during the tensile test, it will only tighten as it is pulled, and the automotive connector will not come out, resulting in good overall clamping reliability.

[0032] In this embodiment, a first arc-shaped guide plate 103 and a second arc-shaped guide plate 104 arranged in parallel are detachably and fixedly connected to the clamp 1. The arc-shaped guide portion is an arc-shaped sliding groove 102 formed between the first arc-shaped guide plate 103, the second arc-shaped guide plate 104, and the clamp 1. The bottom of the connecting rod 3 is provided with an arc-shaped sliding plate 301 that is slidably fitted in the arc-shaped sliding groove 102. Specifically, the arc-shaped sliding groove 102 adopts a split structure design, which is formed by combining the first arc-shaped guide plate 103, the second arc-shaped guide plate 104, and the clamp 1. The arc-shaped sliding plate 301 can be made of wear-resistant alloy material, and the smooth sliding of the arc-shaped sliding plate 301 is ensured by tolerance control. Here, the first arc-shaped guide plate 103 and the second arc-shaped guide plate 104 are fixedly connected to the clamp 1 by bolts. Thus, this technical solution realizes the continuous adjustable positioning of the connecting rod 3 in the circumferential direction through the cooperation of the arc-shaped guide groove 101a and the sliding plate. The split guide plate structure facilitates processing and assembly. Meanwhile, the detachable design reduces maintenance costs.

[0033] In this embodiment, the radial outer edge of the first arc-shaped guide plate 103 is provided with a first baffle 103a extending towards the side of the second arc-shaped guide plate 104, and the radial outer edge of the second arc-shaped guide plate 104 is provided with a second baffle 104a extending towards the side of the first arc-shaped guide plate 103. A locking nut 302 is threaded onto the connecting rod 3. After the locking nut 302 is tightened, the arc-shaped sliding plate 301 cooperates with the locking nut 302 to clamp onto the first baffle 103a and the second baffle 104a. The first baffle 103a and the second baffle 104a can prevent the arc-shaped sliding plate 301 from derailing. As a preferred embodiment, the contact surface between the arc-shaped sliding plate 301 and the arc-shaped guide groove 101a can be provided with a self-lubricating material layer, such as a polytetrafluoroethylene coating, to reduce friction loss. Thus, this technical solution achieves precise guidance and bidirectional limiting when the connecting rod 3 slides circumferentially through the combination structure of the double arc-shaped guide plate and the baffle. The clamping mechanism between the locking nut 302 and the baffle provides a stable locking force while ensuring flexibility in angle adjustment. This design effectively prevents radial offset and axial movement of the connecting rod 3 during tensile testing, thereby ensuring the accuracy of the tensile force direction.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fixture for tensile testing of automotive connectors, characterized in that: It includes a clamp (1), a clamping mechanism (2) disposed on the clamp (1), and a connecting rod (3), wherein the clamping mechanism (2) is used to clamp the automotive connector, and the connecting rod (3) is used to connect to a tensile testing machine; The clamp (1) is provided with an arc-shaped guide portion extending along its circumference, and the connecting rod (3) can slide along the arc-shaped guide portion and can be locked in the arc-shaped guide portion.

2. The fixture for tensile testing of automotive connectors according to claim 1, characterized in that: The clamping mechanism (2) includes: The first clamping block (201) is detachably connected to the clamping seat (1); The second clamping block (202) is slidably and lockably disposed on the clamping seat (1), and the second clamping block (202) is disposed opposite to the first clamping block (201), forming a clamping space for clamping the automotive connector between the second clamping block (202) and the first clamping block (201).

3. The fixture for tensile testing of automotive connectors according to claim 2, characterized in that: The clamp (1) is provided with a receiving groove (101) for accommodating the first clamp (201) and the second clamp (202), and the first clamp (201) and the second clamp (202) are located in the receiving groove (101).

4. The fixture for tensile testing of automotive connectors according to claim 3, characterized in that: The clamping mechanism (2) further includes a locking screw (203), which is threadedly connected to the clamping seat (1); one end of the locking screw (203) abuts against the second clamping block (202) and is used to push the second clamping block (202) toward the first clamping block (201).

5. The fixture for tensile testing of automotive connectors according to claim 3, characterized in that: The clamp (1) is detachably connected to a receiving groove cover plate (4), which covers the first clamping block (201) and the second clamping block (202) in the receiving groove (101); the bottom opening of the receiving groove (101) is used to allow the car connector to be inserted into the clamping space formed by the second clamping block (202) and the first clamping block (201) through the opening.

6. The fixture for tensile testing of automotive connectors according to claim 5, characterized in that: The bottom of the receiving groove (101) is provided with a guide groove (101a); The second clamping block (202) includes a limiting slider (2021) and a clamping block (2022) detachably connected to the limiting slider (2021). The limiting slider (2021) is slidably fitted in the guide groove (101a). The clamping block (2022) is used to cooperate with the first clamping block (201) to lock the automotive connector.

7. The fixture for tensile testing of automotive connectors according to claim 6, characterized in that: The first clamping block (201) is a wedge-shaped block, and the first clamping block (201) is tightened and attached to the side wall of the receiving groove (101) by the first tension spring (5).

8. The fixture for tensile testing of automotive connectors according to claim 6, characterized in that: The clamping block (2022) is a wedge-shaped block, and the clamping block (2022) is tightened and attached to the side wall of the limiting slider (2021) and the receiving groove (101) by the second tension spring (6).

9. The fixture for tensile testing of automotive connectors according to claim 1, characterized in that: The clamp (1) is detachably and fixedly connected to a first arc-shaped guide plate (103) and a second arc-shaped guide plate (104) arranged in parallel. The arc-shaped guide part is an arc-shaped groove (102) formed between the first arc-shaped guide plate (103), the second arc-shaped guide plate (104) and the clamp (1). The bottom of the connecting rod (3) is provided with an arc-shaped sliding plate (301) that is slidably fitted in the arc-shaped groove (102).

10. The fixture for tensile testing of automotive connectors according to claim 9, characterized in that: The first arc-shaped guide plate (103) has a first baffle (103a) extending toward the side of the second arc-shaped guide plate (104) on its radial outer edge, and the second arc-shaped guide plate (104) has a second baffle (104a) extending toward the side of the first arc-shaped guide plate (103) on its radial outer edge. The connecting rod (3) is threaded with a locking nut (302). After the locking nut (302) is tightened, the arc-shaped sliding plate (301) and the locking nut (302) are clamped together on the first baffle (103a) and the second baffle (104a).

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