Test tool

Abstract

The utility model provides a testing tool which comprises a rack, a first clamping mechanism and a second clamping mechanism, the first clamping mechanism and the second clamping mechanism are arranged on the rack, and the first clamping mechanism comprises a rotatable cross rod arranged on the rack and a rotation driving assembly used for driving the cross rod to rotate. The first clamping mechanism is arranged on the transverse rod, a clamping assembly used for clamping a seat backrest with a headrest is arranged on the transverse rod, the second clamping mechanism is located below the first clamping mechanism, the second clamping mechanism is used for clamping a heavy object tied and hung below the headrest through a rope, and when the second clamping mechanism releases the clamped heavy object, the locking strength of the headrest is tested. According to the test tool, an operator does not need to adjust the angle of the automobile seat, manpower is saved, the test efficiency is improved, the second clamping mechanism can rapidly clamp or release a heavy object, the preparation work time before test is shortened, and the test efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories testing, in particular to a testing tool for testing the locking strength of a vehicle seat headrest. Background Art

[0002] Car seat headrests are mainly used to ensure the safety of passengers in traffic accidents and reduce the risk of cervical spine injuries by providing head support. Since the headrests are designed to accommodate people of different heights, they are usually adjustable and installed in the car seats and locked by fixing devices. In order to ensure that the performance of the headrests is within the industry standard, the performance of the headrests needs to be tested. When testing the performance of the headrests, the headrests should be in the most unfavorable position (usually the highest position).

[0003] In the existing technology, after the car seat sample is usually fixed at a high place, the angle of the sample needs to be manually adjusted so that the angle of the connecting rod connecting the headrest to the car seat body is perpendicular to the ground. The fixing and adjustment process is time-consuming and labor-intensive, affecting test efficiency. Utility Model Content

[0004] In view of this, the present invention aims to provide a test fixture to improve the test efficiency of the vehicle seat headrest locking strength test.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A test fixture used to test the locking strength of vehicle seat headrests:

[0007] The test fixture includes a frame, and a first clamping mechanism and a second clamping mechanism provided on the frame;

[0008] The first clamping mechanism includes a rotatable crossbar provided on the frame, and a rotation drive assembly for driving the crossbar to rotate, and the crossbar is provided with a clamping assembly for clamping a seat back with a headrest;

[0009] The second clamping mechanism is located below the first clamping mechanism. The second clamping mechanism is used to clamp a heavy object hung below the headrest by a rope, and when the second clamping mechanism releases the clamped heavy object, the locking strength of the headrest is tested.

[0010] Furthermore, the frame has two vertical brackets arranged opposite to each other, one end of the cross bar is rotatably connected to the vertical bracket on one side, the other end of the cross bar is connected to the rotation drive assembly, and the rotation drive assembly is connected to the vertical bracket on the other side.

[0011] Furthermore, vertical slide rails are provided on the vertical brackets on both sides, and first sliders with first locking components are provided on the vertical slide rails on both sides, and the first locking component is used to lock the sliding position of the first slider on the vertical slide rails; one end of the cross bar connected to the vertical bracket is connected to the first slider on the same side, and the rotation drive component is connected to the first slider on the other side.

[0012] Furthermore, a second slider with a second locking assembly is provided on the vertical slide rail on one side, the second locking assembly is used to lock the sliding position of the second slider on the vertical slide rail, and the second clamping mechanism is connected to the second slider.

[0013] Furthermore, the second clamping mechanism adopts a first electric clamping jaw connected to the second slider.

[0014] Furthermore, the rotary drive assembly adopts an electric rotary clamp connected to the first slider on the corresponding side, and the end of the cross bar close to the electric rotary clamp is clamped by the electric rotary clamp.

[0015] Furthermore, the position of the clamping assembly can be adjusted along the length direction of the crossbar.

[0016] Furthermore, a transverse slide rail is provided on the cross bar, the clamping assembly is slidably arranged on the transverse slide rail, and a third locking assembly for locking the position of the clamping assembly is provided between the clamping assembly and the transverse slide rail.

[0017] Furthermore, there are at least two clamping assemblies arranged on the transverse slide rail, and the third locking assembly is respectively provided between each clamping assembly and the transverse slide rail.

[0018] Furthermore, the clamping assembly adopts a second electric clamping jaw arranged on the transverse slide rail.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The test fixture described in the present invention, after clamping the seat back through the clamping component, can drive the seat back to rotate through the rotary drive component, so that the headrest rod is perpendicular to the ground, and there is no need for the operator to adjust the angle of the car seat, saving manpower and improving test efficiency. In addition, the second clamping mechanism can quickly clamp or release heavy objects, reducing the preparation time before the test and further improving the test efficiency.

[0021] The frame consists of two vertical supports, offering a simple structure and a solid foundation. This ensures the stability and reliability of the entire test fixture during operation, helping to reduce testing errors caused by equipment shake or instability and ensuring the accuracy of test results. When the rotary drive assembly's rotating end rotates, it also drives the crossbar, reducing manual intervention and improving headrest testing efficiency.

[0022] Secondly, the design of the vertical slide rail and the first slider can easily adjust the height of the cross bar and the rotary drive assembly, and then adjust the height of the seat back. The first locking assembly can quickly lock and unlock the first slider to ensure the precise position of the first slider on the vertical slide rail, thereby ensuring the accurate height positioning of the cross bar and the rotary drive assembly, and the cross bar height adjustment is more convenient, thereby improving operational flexibility.

[0023] Furthermore, the second slider on the vertical slide rail can conveniently adjust the height of the second clamping mechanism, thereby facilitating the adjustment of the height of the weight, so that when the second clamping mechanism releases the weight at different heights, the impact load applied by the weight to the headrest can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic structural diagram of the test tooling according to an embodiment of the present utility model;

[0026] Figure 2 This is a structural diagram of the first sliding block according to an embodiment of the present utility model;

[0027] Figure 3 This is a structural diagram of the first locking assembly according to an embodiment of the present utility model;

[0028] Figure 4 This is a structural diagram of the second clamping mechanism according to an embodiment of the present utility model;

[0029] Figure 5 This is a schematic structural diagram of the clamping assembly according to an embodiment of the present utility model;

[0030] Description of reference numerals:

[0031] 1. Frame; 101. Vertical bracket; 102. Vertical slide rail; 103. First slider; 104. First locking assembly; 1041. Screw; 1042. Crank;

[0032] 105. Second slider; 106. Second locking assembly;

[0033] 2. First clamping mechanism; 201. Crossbar; 2011. Horizontal slide rail; 202. Clamping assembly; 203. Third locking assembly; 204. Electric rotating clamping jaw;

[0034] 3. Second clamping mechanism; 301. Rope; 302. Weight;

[0035] 4. Headrest; 5. Seat back. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0037] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0038] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] Example 1

[0041] This embodiment relates to a test fixture for testing the locking strength of a vehicle seat headrest 4. The overall structure is as follows: Figures 1 to 5 As shown, the test fixture of this embodiment includes a frame 1 , and a first clamping mechanism 2 and a second clamping mechanism 3 provided on the frame 1 .

[0042] Among them, the first clamping mechanism 2 includes a rotatable cross bar 201 arranged on the frame 1, and a rotation drive assembly for driving the cross bar 201 to rotate, and the cross bar 201 is provided with a clamping assembly 202 for clamping the seat back 5 with the headrest 4. The second clamping mechanism 3 is located below the first clamping mechanism 2. The second clamping mechanism 3 is used to clamp a heavy object 302 hung under the headrest 4 by a rope 301, and when the second clamping mechanism 3 releases the clamped heavy object 302, the locking strength of the headrest 4 is tested.

[0043] At this point, as configured above, frame 1 serves as a support, while first clamping mechanism 2 secures and adjusts the position of seat back 5. Clamping assembly 202, after clamping seat back 5, secures it to crossbar 201, preventing it from falling off during testing and affecting the test results of headrest 4. Secondly, the rotary drive assembly rotates crossbar 201, and as crossbar 201 rotates, the seat back 5, secured to crossbar 201, rotates along with it until the headrest 4 is perpendicular to the ground. Therefore, once seat back 5 is clamped to clamping assembly 202, the operator no longer needs to adjust the angle of the vehicle seat, saving manpower and improving testing efficiency.

[0044] In addition, the second clamping mechanism 3 can quickly clamp or release the weight 302. During multiple tests, the height of the weight 302 clamped by the second clamping mechanism 3 each time is substantially the same, so that when the weight 302 is released, the impact load applied by the weight 302 to the headrest 4 through the rope 301 is equal, thereby improving the reliability of the test results. In addition, there is no need to manually adjust the height of the weight 302, which reduces the preparation time before the test and further improves the test efficiency.

[0045] It is understandable that, in this embodiment, as a preferred implementation form, see Figure 1 As shown, the frame 1 has two vertical brackets 101 arranged opposite to each other, one end of the cross bar 201 is rotatably connected to the vertical bracket 101 on one side, and the other end of the cross bar 201 is connected to the rotation drive assembly, and the rotation drive assembly is connected to the vertical bracket 101 on the other side.

[0046] The frame 1 has two vertical supports 101, which are simple in structure and provide a solid foundation, ensuring the stability and reliability of the entire test fixture during operation. This helps reduce testing errors caused by equipment shaking or instability, and ensures the accuracy of test results. Because one end of the crossbar 201 is rotatably connected to one of the vertical supports 101, and the rotating end of the rotary drive assembly is connected to the other end of the crossbar 201, when the rotating end of the rotary drive assembly rotates, it can also drive the crossbar 201 to rotate, so that the rotation of the crossbar 201 can be used to adjust the angle of the seat back 5 clamped thereunder.

[0047] In addition, combined Figure 1 As shown, a connecting rod can also be provided at the upper ends of the two vertical brackets 101. The two vertical brackets 101 and the connecting rod form an N-shaped structure of the frame 1, so that the frame 1 forms a whole. The overall rigidity of the frame 1 can be significantly enhanced. When the heavy object 302 applies an impact load to the headrest 4, the frame 1 can reduce the deformation that occurs, thereby increasing the service life of the test fixture.

[0048] It is worth mentioning that, in this embodiment, as a preferred implementation form, see Figure 1 and Figure 3 As shown, vertical rails 102 are provided on the vertical brackets 101 on both sides, and first sliders 103 with first locking assemblies 104 are provided on the vertical rails 102 on both sides. The first locking assemblies 104 are used to lock the sliding position of the first slider 103 on the vertical rails 102. One end of the cross bar 201 connected to the vertical bracket 101 is connected to the first slider 103 on the same side, and the rotation drive assembly is connected to the first slider 103 on the other side.

[0049] The design of the vertical slide rail 102 and the first slider 103 can conveniently adjust the height of the cross bar 201 and the rotary drive assembly, and thus adjust the height of the seat back 5. Preferably, after the seat back 5 is fixed on the cross bar 201, the headrest 4 is positioned more than 1 m from the ground, and the first locking assembly 104 can quickly lock and unlock the first slider 103. Locking the first slider 103 can ensure the precise position of the first slider 103 on the vertical slide rail 102, thereby ensuring the accurate height positioning of the cross bar 201 and the rotary drive assembly, and after unlocking the first slider 103, the cross bar 201 can slide along the vertical slide rail 102, making the height adjustment of the cross bar 201 and the seat back 5 more convenient and improving the flexibility of operation.

[0050] Specifically, the first locking assembly 104 includes a screw 1041 threaded on the first slider 103, and a crank 1042 provided on the screw 1041. One end of the screw 1041 is pressed against the vertical slide rail 102. When the position of the first slider 103 needs to be adjusted, the crank 1042 is rotated to separate the screw 1041 from the vertical slide rail 102. At this time, the first slider 103 can slide on the vertical slide rail 102. After adjusting the position, the crank 1042 can be rotated in the opposite direction so that the screw 1041 is pressed against the vertical slide rail 102 again to fix the first slider 103.

[0051] It should be noted that, in this embodiment, as a preferred implementation form, see Figure 3As shown, a second slider 105 with a second locking assembly 106 is provided on the vertical slide rail 102 on one side. The second locking assembly 106 is used to lock the sliding position of the second slider 105 on the vertical slide rail 102, and the second clamping mechanism 3 is connected to the second slider 105.

[0052] The second slider 105 on the vertical slide rail 102 facilitates adjustment of the height of the second clamping mechanism 3, and thus facilitates adjustment of the height of the weight 302. This allows adjustment of the impact load exerted by the weight 302 on the headrest 4 when the second clamping mechanism 3 releases the weight 302 at different heights. Preferably, the weight 302 can weigh, for example, 2.5 kg, and be 0.8 m high. Furthermore, the length of the rope 301 should be shorter than the distance between the headrest 4 and the ground.

[0053] The second locking assembly 106 can quickly lock and unlock the second slider 105. Unlocking the second slider 105 facilitates height adjustment of the weight 302, improving operational flexibility. Locking the second slider 105 ensures its precise position and prevents the weight 302 from shifting during multiple tests of the headrest 4, thereby avoiding significant testing errors. Furthermore, the second locking assembly 106 can employ the same structure as the first locking assembly 104 and will not be further described here.

[0054] Furthermore, in this embodiment, as a preferred implementation, the second clamping mechanism 3 utilizes a first electric clamp connected to the second slider 105. The first electric clamp can quickly clamp and release the weight 302, shortening the test cycle and improving test efficiency. Of course, the second clamping mechanism 3 can also utilize a pneumatic clamp or other type of clamp that can quickly clamp and release the weight 302, which will not be discussed further here.

[0055] In this embodiment, as a preferred implementation form, continue to refer to Figure 1 As shown, the rotation drive assembly utilizes an electric rotary clamp 204 connected to the first slider 103 on the corresponding side. The end of the crossbar 201 closest to the electric rotary clamp 204 is clamped by the electric rotary clamp 204. The electric rotary clamp 204 drives the crossbar 201 to rotate, which in turn drives the seat back 5 to rotate, adjusting the angle between the headrest rod 4 and the ground. When the headrest rod 4 is perpendicular to the ground, the headrest 4 is adjusted, eliminating the need for manual adjustment by the operator and further improving testing efficiency.

[0056] In addition, as a preferred embodiment, see Figure 2As shown, the clamping assembly 202 can be adjusted along the length of the crossbar 201. This allows the position of the seat back 5 on the crossbar 201 to be adjusted, thereby preventing obstruction between the seat back 5 and the vertical bracket 101 and affecting the clamping assembly 202 from clamping the seat back 5, thereby improving the practicality of the test fixture.

[0057] In addition, in this embodiment, as a preferred implementation form, see Figure 5 As shown, a transverse rail 2011 is provided on the crossbar 201, and a clamping assembly 202 is slidably disposed on the transverse rail 2011. A third locking assembly 203 is provided between the clamping assembly 202 and the transverse rail 2011 to lock the position of the clamping assembly 202. In specific implementation, the structure of the third locking assembly 203 can also refer to the structure of the first locking assembly 104, and will not be described in detail here.

[0058] The clamping assembly 202 can slide on the transverse slide rail 2011 to adjust the position of the clamped seat back 5 laterally to accommodate seat backs 5 of different widths. The third locking assembly 203 that locks the position of the clamping assembly 202 can ensure that after the clamping assembly 202 is adjusted to its position, the third locking assembly 203 fixes the clamping assembly 202, thereby ensuring the precise position of the clamping assembly 202 on the transverse slide rail 2011, preventing the seat back 5 from sliding along the transverse slide rail 2011 when the heavy object 302 applies an impact load to the headrest 4, thereby ensuring the consistency of the test conditions and improving the repeatability and reliability of the test results.

[0059] As a preferred embodiment, see Figure 5 As shown, at least two clamping assemblies 202 are mounted on the transverse rail 2011, with a third locking assembly 203 positioned between each clamping assembly 202 and the transverse rail 2011. The two clamping assemblies 202 can simultaneously secure different portions of the seat back 5, providing a more stable clamping effect, reducing shaking and instability, and improving test accuracy. Furthermore, the two clamping assemblies 202 can be independently adjusted on the transverse rail 2011 to accommodate seat backs 5 of varying widths and shapes, enhancing the applicability of the test fixture.

[0060] In this embodiment, also as a preferred implementation, the clamping assembly 202 utilizes a second electric clamp mounted on a transverse slide rail 2011. After testing is complete, the two clamping jaws of the second electric clamp release the seat back 5. Once a new seat back 5 is placed between the two clamping jaws, the two clamping jaws tighten the new seat back 5, facilitating replacement of the seat back 5, shortening the testing cycle, and improving testing efficiency. Of course, the clamping assembly 202 may also utilize other clamping structures, such as pneumatic clamps, which will not be discussed further here.

[0061] It is worth noting that when the test fixture of this embodiment is in use, it can generally be connected to a PLC controller to connect the signals of the above-mentioned first electric clamp, second electric clamp and electric rotating clamp through the PLC controller, so that during testing, the PLC controller can be used to control the opening and closing of the clamps of the first electric clamp and the second electric clamp, as well as the rotation angle of the electric rotating clamp.

[0062] During the test, the height of the crossbar 201 is adjusted according to the height of the seat back 5 to be tested, and the distance between the two second electric grippers is adjusted according to the width of the seat back. This ensures that the two second electric grippers can reliably grip the seat back 5 after clamping. Then, the headrest 4 is extended to the highest position of the seat back, and the seat back 5 is inverted. The PLC is then used to control the two second electric grippers to clamp the seat back 5 so that it is perpendicular to the ground.

[0063] Next, based on the fact that there is generally a certain angle between the headrest 4 and the seat back 5 (this angle is determined when the vehicle seat is designed, and the angle may be different for different vehicle seat models; for example, in some vehicle seats, the angle between the headrest 4 and the seat back 5 is 10°), when the seat back 5 is initially perpendicular to the ground, the headrest 4 is not perpendicular to the ground. Therefore, the PLC device can control the electric rotating clamp 204 to drive the crossbar 201 to rotate an angle corresponding to the above angle to adjust the angle between the headrest 4 and the ground so that the headrest 4 is perpendicular to the ground. Then, according to the height of the clamped headrest 4, the height of the first electric clamp is adjusted so that it is located below the headrest 4. The rope 301 is then passed through the center of the headrest 4 and tied to the headrest 4, and the first electric clamp clamps the weight 302 on the rope 301.

[0064] After ensuring the seat back 5 is properly positioned, the PLC controller is triggered to continue operating, controlling the first electric gripper to release the weight 302. The weight 302 then falls under the action of gravity, applying an impact load to the headrest 4 via the rope 301. If the headrest 4 remains on the seat back 5 after the weight 302 falls, the locking strength of the headrest 4 is qualified. If the headrest 4 separates from the seat back 5 after the weight 302 falls, the locking strength of the headrest 4 is unqualified, thus completing the test of the locking strength of the headrest 4.

[0065] The test fixture of this embodiment adopts the above structure and can use two second electric clamps to clamp the seat back 5. When the seat back 5 is firmly fixed, the angle of the headrest 4 can also be adjusted by the electric rotating clamp 204. At the same time, the weight 302 can be released by the first electric clamp to test the locking strength of the headrest. It can be operated by a single person during the test, which can optimize the personnel allocation. It not only helps to improve the test efficiency, but also helps to improve the stability of the test, and has good practicality.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A test fixture for testing the locking strength of a vehicle seat headrest (4), characterized in that: The testing fixture comprises a frame (1), and a first clamping mechanism (2) and a second clamping mechanism (3) provided on the frame (1); The first clamping mechanism (2) comprises a rotatable crossbar (201) provided on the frame (1), and a rotation drive assembly for driving the crossbar (201) to rotate, and a clamping assembly (202) for clamping a seat back (5) with a headrest (4) is provided on the crossbar (201); The second clamping mechanism (3) is located below the first clamping mechanism (2). The second clamping mechanism (3) is used to clamp a heavy object (302) hung below the headrest (4) via a rope (301), and when the second clamping mechanism (3) releases the clamped heavy object (302), the locking strength of the headrest (4) is tested.

2. The test fixture according to claim 1, characterized in that: The frame (1) has two vertical supports (101) arranged opposite to each other, one end of the cross bar (201) is rotatably connected to the vertical support (101) on one side, the other end of the cross bar (201) is connected to the rotary drive assembly, and the rotary drive assembly is connected to the vertical support (101) on the other side.

3. The test fixture according to claim 2, characterized in that: A vertical slide rail (102) is provided on each of the vertical supports (101) on both sides, and a first slider (103) with a first locking assembly (104) is provided on each of the vertical slide rails (102) on both sides, wherein the first locking assembly (104) is used to lock the sliding position of the first slider (103) on the vertical slide rail (102); One end of the crossbar (201) connected to the vertical bracket (101) is connected to the first slider (103) on the same side, and the rotation drive assembly is connected to the first slider (103) on the other side.

4. The test fixture according to claim 3, characterized in that: A second slider (105) with a second locking assembly (106) is provided on the vertical slide rail (102) on one side, the second locking assembly (106) being used to lock the sliding position of the second slider (105) on the vertical slide rail (102), and the second clamping mechanism (3) is connected to the second slider (105).

5. The test fixture according to claim 4, characterized in that: The second clamping mechanism (3) adopts a first electric clamping claw connected to the second slider (105).

6. The test fixture according to claim 3, characterized in that: The rotary drive assembly adopts an electric rotary clamp (204) connected to the first slider (103) on the corresponding side, and one end of the crossbar (201) close to the electric rotary clamp (204) is clamped by the electric rotary clamp (204).

7. The test fixture according to any one of claims 1 to 6, characterized in that: The clamping assembly (202) can be adjusted in position along the length direction of the crossbar (201).

8. The test fixture according to claim 7, characterized in that: A transverse slide rail (2011) is provided on the crossbar (201), the clamping assembly (202) is slidably arranged on the transverse slide rail (2011), and a third locking assembly (203) for locking the position of the clamping assembly (202) is provided between the clamping assembly (202) and the transverse slide rail (2011).

9. The test fixture according to claim 8, characterized in that: At least two of the clamping assemblies (202) are arranged on the transverse slide rail (2011), and the third locking assembly (203) is respectively provided between each of the clamping assemblies (202) and the transverse slide rail (2011).

10. The test fixture according to claim 8, characterized in that: The clamping assembly (202) adopts a second electric clamping jaw arranged on the transverse slide rail (2011).

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