A durability test device for an electric tailgate stay rod

Abstract

This utility model discloses a durability testing device for an electric tailgate strut, relating to the field of strut testing technology, including a test bench, a drive mechanism, and a control system. The test bench is equipped with a clamping module, which includes a fixed base, a movable base, a movable gripper, and an elastic pre-tightening mechanism. The fixed base is fixed to the bench, and the movable base is slidably connected to the bench and linked to the output end of the drive mechanism. The movable gripper is located on the movable base, and its side facing the strut has a contour groove matching the shape of the strut end. The elastic pre-tightening mechanism is located between the movable base and the movable gripper, providing a clamping force perpendicular to the strut's axial direction. This device automatically aligns the irregularly shaped structure at the strut end through the contour groove, and achieves radial self-locking through the elastic pre-tightening mechanism, simplifying the clamping process to a two-step "placement-clamping" operation, improving clamping efficiency, eliminating the cumbersome alignment of traditional bolt tightening methods, reducing testing auxiliary time, and ensuring the stability of the strut during testing.

Description

Technical Field

[0001] This utility model relates to the field of strut testing technology, specifically to a device for testing the durability of electric tailgate struts. Background Technology

[0002] As a key component of the vehicle's intelligent electronic control system, the long-term reliability of the electric tailgate strut is of paramount importance and must be rigorously verified through reciprocating durability tests simulating frequent opening and closing of the tailgate.

[0003] However, existing testing devices require multiple bolts and pressure plates to fasten both ends of the strut to the test bench during testing. Each time a new sample is replaced after testing, the operator must manually loosen and remove multiple bolts and pressure plates one by one. After installing the new sample, the operator must manually align, place the pressure plates, and retighten all bolts one by one, which consumes a lot of non-testing time. To address this, we propose an electric tailgate strut durability testing device. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a device for testing the durability of electric tailgate struts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An electric tailgate strut durability testing device includes a test bench, a drive mechanism, and a control system. The test bench is equipped with a clamping module for quick clamping of the strut. The clamping module includes a fixed base, a movable base, a movable gripper, and an elastic pre-tightening mechanism. The fixed base is fixedly mounted on the test bench. The movable base is slidably mounted on the test bench and is drivenly connected to the output end of the drive mechanism. The movable gripper is mounted on the movable base. The elastic pre-tightening mechanism is located between the movable base and the movable gripper, providing a clamping force perpendicular to the strut's axial direction. The movable gripper has a contoured groove on the side facing the strut that matches the shape of the strut's end.

[0006] Preferably, both the movable base and the fixed base are fixedly provided with mounting brackets, and the mounting brackets are provided with limiting brackets on both sides, and the limiting brackets are slidably connected to the mounting brackets.

[0007] Preferably, both the fixed base and the movable base are provided with pressure blocks; a fixing screw is rotatably provided inside the limiting frame, one end of the fixing screw is rotatably connected to the pressure block, and the other end passes through the side of the mounting frame and is fixedly provided with a handle, and the fixing screw is threadedly connected to the mounting frame.

[0008] Preferably, the elastic preload mechanism includes a compression spring, a transition plate, and an adjusting screw; a mounting block is provided on the movable base; the adjusting screw passes through the side of the mounting bracket of the movable base and is threadedly connected to the mounting bracket; the transition plate is located between the mounting block and the adjusting screw, one end of the adjusting screw is rotatably connected to the transition plate, and the other end is fixedly provided with an adjusting handle; the compression spring is located between the mounting block and the transition plate.

[0009] Preferably, a limiting rod is fixedly provided on the side of the mounting block near the transition plate, and the side of the limiting rod away from the mounting block passes through the transition plate and the limiting frame, with a compression spring sleeved on the outside of the limiting rod.

[0010] Preferably, a positioning post is fixedly provided on the side of the movable gripper away from the pressure block, and positioning holes are provided in an array on the vertical surface of the mounting block, with the positioning post inserted into the positioning holes.

[0011] Preferably, the outer side of the end of the positioning post is provided with a limiting groove, and the outer side of the mounting block is provided with an insert piece. The insert piece is inserted into the limiting groove to fix the positioning post in the positioning hole.

[0012] Preferably, the top of the movable base is provided with a sliding groove, and the bottom of the mounting block is fixedly provided with a slider, which slides in cooperation with the sliding groove.

[0013] Preferably, the adjusting screw and the fixed screw are arranged symmetrically.

[0014] Preferably, the mounting block and the pressure block are arranged symmetrically.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Because the clamping module adopts a combination design of contour groove and elastic pre-tightening mechanism, the operator only needs to place the end of the support rod directly into the contour groove of the movable jaw, and the elastic pre-tightening mechanism will automatically apply a clamping force perpendicular to the axis of the support rod, achieving quick clamping. Compared with the traditional operation of disassembling, aligning and tightening bolt plates one by one, this device eliminates the tedious tightening steps, shortens the sample replacement time, and effectively improves testing efficiency; The combination of the movable gripper and the elastic preload mechanism eliminates the need for tools during the clamping process. Operators can simply place or remove the support rod sample by hand to complete clamping and release; simultaneously, the preload or fixed position can be easily adjusted by rotating the adjustment handle and other manual components. This design reduces the physical exertion and operational complexity of the assembly and disassembly process, improving the human-machine interface of the testing procedure. The rapid clamping mechanism shortens sample changeover time and reduces test intervals. This not only reduces operator waiting time but also ensures near-continuous operation of the testing equipment, improving equipment utilization and test throughput per unit time. Simultaneously, reducing repetitive manual labor allows operators to focus on test monitoring and data analysis, further guaranteeing test quality and efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective; Figure 3 This is a schematic diagram of the movable base structure of this utility model; Figure 4 This is a schematic diagram showing the distribution of the pressure blocks and mounting blocks on the movable base of this utility model; Figure 5 This is a schematic diagram of the outer structure of the mounting block of this utility model; Figure 6 This is a schematic diagram of the insert installation of this utility model.

[0018] Drawing number explanation: 1. Test bench; 2. Drive mechanism; 3. Clamping module; 4. Fixed base; 5. Movable base; 6. Movable gripper; 7. Elastic pre-tightening mechanism; 8. Contouring groove; 9. Mounting bracket; 10. Limiting bracket; 11. Pressure block; 12. Fixing screw; 13. Rotary handle; 14. Compression spring; 15. Transition plate; 16. Adjusting screw; 17. Mounting block; 18. Adjusting handle; 19. Limiting rod; 20. Positioning post; 21. Positioning hole; 22. Limiting groove; 23. Insert; 24. Slide groove; 25. Slider. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] 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 modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0021] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0022] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0023] Please see Figure 1-6 An electric tailgate strut durability testing device includes a test bench 1, a drive mechanism 2, and a control system. The test bench 1 is equipped with a clamping module 3 for quick clamping of the strut. The clamping module 3 includes a fixed base 4, a movable base 5, a movable gripper 6, and an elastic pre-tightening mechanism 7. The fixed base 4 is fixedly mounted on the test bench 1. The movable base 5 is slidably mounted on the test bench 1 and is drivenly connected to the output end of the drive mechanism 2. The fixed base 4 provides a static support reference, and the movable base 5 is pulled by the drive mechanism 2 to simulate the opening and closing motion of the tailgate. The movable gripper 6 is mounted on the movable base 5; the elastic pre-tightening mechanism 7 is located between the movable base 5 and the movable gripper 6, providing a clamping force perpendicular to the strut's axial direction; the movable gripper 6 has a contour groove 8 on the side facing the strut, matching the shape of the strut end, which directly matches the irregular structure of the strut end, such as a ball head / flange, eliminating the need for traditional bolt alignment; the elastic pre-tightening mechanism 7 generates an automatic clamping force perpendicular to the strut's axial direction between the gripper and the base, preventing radial movement of the strut during testing. This design simplifies the clamping action to two steps: "placement-clamping," improving operational efficiency.

[0024] The movable base 5 and the fixed base 4 are both fixedly equipped with mounting brackets 9, forming the main support frame. Limiting brackets 10 are provided on both sides of the mounting brackets 9, and the limiting brackets 10 are slidably connected to the mounting brackets 9. Both the fixed base 4 and the movable base 5 are equipped with pressure blocks 11. A fixing screw 12 is rotatably installed inside the limiting bracket 10. One end of the fixing screw 12 is rotatably connected to the pressure block 11, and the other end passes through the side of the mounting bracket 9 and is fixedly equipped with a handle 13. The fixing screw 12 is threadedly connected to the mounting bracket 9. When the handle 13 is rotated, the threaded fixing screw 12 drives the pressure block 11 to move along the mounting bracket 9, thereby changing the horizontal position of the support rod installation position. This design allows the same equipment to accommodate support rods of different lengths, enabling rapid adjustment and clamping through single-point operation.

[0025] In addition, the elastic pre-tightening mechanism 7 includes a compression spring 14, a transition plate 15, and an adjusting screw 16; a mounting block 17 is provided on the movable base 5; the adjusting screw 16 passes through the side of the mounting frame 9 of the movable base 5 and is threadedly connected to the mounting frame 9; the transition plate 15 is located between the mounting block 17 and the adjusting screw 16, one end of the adjusting screw 16 is rotatably connected to the transition plate 15, and the other end is fixedly provided with an adjusting handle 18; the compression spring 14 is located between the mounting block 17 and the transition plate 15, and rotating the adjusting handle 18 can precisely set the compression amount of the compression spring 14, thereby controlling the initial clamping force of the movable gripper 6 on the support rod. This module ensures that the support rod is not loose during the test, and also avoids damage to the sample due to overpressure through the buffer of the compression spring 14. Meanwhile, a limiting rod 19 is fixedly provided on the side of the mounting block 17 near the transition plate 15. The side of the limiting rod 19 away from the mounting block 17 passes through the transition plate 15 and the limiting frame 10. A compression spring 14 is sleeved on the outside of the limiting rod 19. The limiting rod 19 forms a double guide with the limiting frame 10 by passing through the transition plate 15: firstly, it constrains the compression spring 14 to only extend and retract along the axial direction of the rod body to prevent the preload direction from deviating; secondly, it suppresses the lateral vibration of the movable gripper 6 through the clearance fit between the rod body and the limiting frame 10, ensuring that the support rod can withstand pure axial load during high-speed testing.

[0026] Meanwhile, the top of the movable base 5 is provided with a sliding groove 24, and the bottom of the mounting block 17 is fixedly provided with a slider 25. The slider 25 and the sliding groove 24 are slidably engaged to form a vertical sliding pair. When adjusting the lateral position of the gripper, the slider 25 can move synchronously along the sliding groove 24 to maintain the rigid connection between the mounting block 17 and the movable base 5, ensuring that support rods of different specifications can obtain a stable support plane.

[0027] It is worth noting that the adjusting screw 16 and the fixed screw 12 are symmetrically arranged, and the mounting block 17 and the pressure block 11 are symmetrically arranged, forming a bidirectional balanced force application system. This design ensures that both ends of the support rod bear a uniform load, eliminates test errors caused by stress concentration on one side, and can extend the life of the screw thread.

[0028] The working principle of this device is as follows: The two ends of the support rod are respectively placed into the contour grooves 8 of the pressure block 11 of the fixed base 4 and the movable claw 6 of the movable base 5, and radial self-centering is achieved by relying on the shape of the groove. The rotating handle 13 can drive the pressure block 11 of the fixed base 4 to move through the fixing screw 12, thereby fixing the fixed end of the support rod, while the telescopic end of the support rod is inserted between the movable claw 6 and the pressure block 11 of the movable base 5. When the clamping force needs to be adjusted, simply rotate the adjusting handle 18 to drive the adjusting screw 16 to rotate, which in turn drives the transition plate 15 and the mounting block 17 to move closer to or further away from the pressure block 11 of the movable base 5, thereby using the compression spring 14 between the mounting block 17 and the transition plate 15 to adjust the magnitude of the clamping force applied to the vertical strut axial direction. The control system activates the drive mechanism 2 (such as a servo motor), which pulls the movable base 5 to slide along the test bench 1. The fixed base 4 remains stationary, while the movable base 5 drives the telescopic end of the support rod to simulate the opening and closing motion of the tailgate for testing. Example

[0029] Please see Figure 5 and Figure 6 A positioning post 20 is fixedly provided on the side of the movable gripper 6 away from the pressure block 11. The mounting block 17 has an array of positioning holes 21 on its vertical surface. The positioning post 20 is inserted into the positioning hole 21 to form a discrete adjustment system. By inserting the positioning post 20 into different holes, the height of the gripper can be adjusted vertically to accommodate the vertical height difference of support rods with different diameters. Furthermore, a limiting groove 22 is provided on the outer side of the end of the positioning post 20, and an insert 23 is provided on the outer side of the mounting block 17. The insert 23 is inserted into the limiting groove 22 and a mechanical interlock is generated after the insert 23 is inserted into the groove, which limits and fixes the positioning post 20 in the positioning hole 21, thereby fixing the height of the movable gripper 6 and avoiding the position drift of the gripper caused by test vibration. At the same time, the movable gripper 6 can be quickly replaced by removing the insert 23 to adapt to different styles of support rod ends.

[0030] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A durability testing device for an electric tailgate strut, comprising a test stand (1), a drive mechanism (2), and a control system; Its features are: The test bench (1) is provided with a clamping module (3) for quick clamping of the support rod. The clamping module (3) includes a fixed base (4), a movable base (5), a movable gripper (6), and an elastic pre-tightening mechanism (7). The fixed base (4) is fixedly mounted on the test bench (1); The movable base (5) is slidably mounted on the test bench (1) and is driven connected to the output end of the drive mechanism (2); The movable gripper (6) is disposed on the movable base (5); The elastic pre-tightening mechanism (7) is located between the movable base (5) and the movable gripper (6) to provide a clamping force perpendicular to the axial direction of the strut; The movable gripper (6) has a contoured groove (8) on the side facing the support rod that matches the shape of the end of the support rod.

2. The electric tailgate strut durability testing device according to claim 1, characterized in that: Mounting brackets (9) are fixedly provided on both the movable base (5) and the fixed base (4). Limiting brackets (10) are provided on both sides of the mounting brackets (9). The limiting brackets (10) are slidably connected to the mounting brackets (9).

3. The electric tailgate strut durability testing device according to claim 2, characterized in that: Both the fixed base (4) and the movable base (5) are provided with pressure blocks (11); a fixed screw (12) is rotatably provided inside the limiting frame (10). One end of the fixed screw (12) is rotatably connected to the pressure block (11), and the other end passes through the side of the mounting frame (9) and is fixedly provided with a throttle (13). The fixed screw (12) is threadedly connected to the mounting frame (9).

4. The electric tailgate strut durability testing device according to claim 3, characterized in that: The elastic pre-tightening mechanism (7) includes a compression spring (14), a transition plate (15), and an adjusting screw (16); a mounting block (17) is provided on the movable base (5); the adjusting screw (16) passes through the side of the mounting frame (9) of the movable base (5) and is threadedly connected to the mounting frame (9); the transition plate (15) is located between the mounting block (17) and the adjusting screw (16), one end of the adjusting screw (16) is rotatably connected to the transition plate (15), and the other end is fixedly provided with an adjusting handle (18); the compression spring (14) is located between the mounting block (17) and the transition plate (15).

5. The electric tailgate strut durability testing device according to claim 4, characterized in that: A limiting rod (19) is fixedly provided on the side of the mounting block (17) near the transition plate (15). The side of the limiting rod (19) away from the mounting block (17) passes through the transition plate (15) and the limiting frame (10). The compression spring (14) is sleeved on the outside of the limiting rod (19).

6. The electric tailgate strut durability testing device according to claim 4, characterized in that: The movable gripper (6) is fixedly provided with a positioning post (20) on the side away from the pressure block (11), and the mounting block (17) is provided with an array of positioning holes (21) on its vertical surface, and the positioning post (20) is inserted into the positioning hole (21).

7. The electric tailgate strut durability testing device according to claim 6, characterized in that: The positioning post (20) has a limiting groove (22) on the outer side of its end, and the mounting block (17) has an insert (23) on the outer side. The insert (23) is inserted into the limiting groove (22) to fix the positioning post (20) in the positioning hole (21).

8. The electric tailgate strut durability testing device according to claim 4, characterized in that: The movable base (5) is provided with a sliding groove (24) at the top, and the mounting block (17) is fixedly provided with a slider (25) at the bottom, and the slider (25) slides in cooperation with the sliding groove (24).

9. The electric tailgate strut durability testing device according to claim 4, characterized in that: The adjusting screw (16) and the fixing screw (12) are arranged symmetrically.

10. The electric tailgate strut durability testing device according to claim 4, characterized in that: The mounting block (17) and the pressure block (11) are arranged symmetrically.

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