Test fixture

Abstract

The utility model discloses a test fixture, relates to the technical field of vehicles, the test fixture is used for limiting a plate spring and a vehicle frame, the test fixture comprises a support assembly, the support assembly is provided with a first support end and a second support end which are arranged at an interval, the first support end is used for abutting against the vehicle frame, and the second support end is used for abutting against the plate spring. And the distance between the first supporting end and the second supporting end is adjustable. The test fixture provided by the utility model improves the efficiency and accuracy of the vehicle straight-going stability test.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a test fixture. Background Technology

[0002] During vehicle braking, straight-line stability plays a crucial role in driving safety and ride comfort. Straight-line stability refers to a vehicle's ability to remain stable and unaffected by external disturbances while traveling in a straight line. Numerous factors influence straight-line stability, including the suspension system, tires, vehicle body structure, road conditions, weather conditions, braking system, and steering system. When testing straight-line stability, the leaf spring suspension in traditional vehicle structures can interfere with the steering system during testing. This interference affects the vehicle's straight-line stability, making it difficult for engineers to accurately identify and locate other factors causing poor straight-line stability, thus impacting test results. Utility Model Content

[0003] The main purpose of this invention is to provide a test fixture that aims to improve the efficiency and accuracy of vehicle straight-line stability testing.

[0004] To achieve the above objectives, this utility model proposes a test fixture for limiting the leaf spring and the vehicle frame. The test fixture includes a support assembly, which has a first support end and a second support end spaced apart. The first support end is used to abut against the vehicle frame, and the second support end is used to abut against the leaf spring. The distance between the first support end and the second support end is adjustable.

[0005] In one embodiment, the support component includes:

[0006] The support member has two parts, which are arranged crosswise and rotatably connected around the intersection point. The two ends of the two support members above the intersection point cooperate to form the first support end and abut against the frame. The two ends of the two support members below the intersection point cooperate to form the second support end and abut against the leaf spring.

[0007] A connecting structure is connected to the support member to adjust the intersection angle of the two support members so that the distance between the first support end and the second support end is adjustable.

[0008] In one embodiment, the intersection point is located at the midpoint of the line connecting the first support end and the second support end in the vertical direction.

[0009] In one embodiment, the connection structure includes:

[0010] The first U-bolt is provided in multiple forms, and the center distance of the multiple first U-bolts is different;

[0011] The connecting hole includes a first connecting sub-hole and a second connecting sub-hole. One of the two support members is provided with the first connecting sub-hole, and the other of the two support members is provided with the second connecting hole. The first connecting hole and the second connecting hole are located on the same side of the intersection point. The first connecting hole and the second connecting hole are connected by one of the plurality of first U-bolts to adjust the intersection angle of the two support members.

[0012] In one embodiment, the connecting structure further includes a first fastener, which is disposed on both sides of the support member and the first U-bolt is screwed to the first U-bolt; and / or, the connecting structure further includes a first connecting piece, which is disposed on both sides of the support member and the first U-bolt is screwed to the first U-bolt.

[0013] In one embodiment, the connection structure includes:

[0014] The second U-bolt is provided in multiple forms, and the center distance of the multiple second U-bolts is different;

[0015] The mounting holes include a first mounting sub-hole and a second mounting sub-hole. One of the two support members is provided with the first mounting sub-hole, and the other of the two support members is provided with the second mounting sub-hole. Both the first mounting sub-hole and the second mounting sub-hole are provided in multiples at intervals along the vertical direction. The second U-bolt selectively connects one of the multiple first mounting sub-holes and one of the multiple second mounting holes to adjust the intersection angle of the two support members.

[0016] In one embodiment, the connecting structure further includes a second fastener, the second fastener and the second U-bolt being respectively disposed on both sides of the support member, and the second fastener and the second U-bolt being screwed together; and / or, the connecting structure further includes a second connecting piece, the second connecting piece and the second U-bolt being respectively disposed on both sides of the support member, and both ends of the support member being respectively sleeved on both ends of the second U-bolt.

[0017] In one embodiment, the support member is configured as a square frame structure formed by alternating horizontal beams and vertical beams, and the vertical beams of two support members are hinged.

[0018] In one embodiment, the support member further includes an extension portion that protrudes from the longitudinal beam and is flush with the transverse beam; each support member includes a first longitudinal beam and a second longitudinal beam disposed opposite to each other, the extension portion being provided on the surface of the first longitudinal beam facing away from the second longitudinal beam; the second longitudinal beam of the other support member is disposed on the side of one of the first longitudinal beams where the extension portion is provided, such that the support lengths of the two support members on the same side of the intersection are the same.

[0019] In one embodiment, there is one support assembly, which is located at the center of the leaf spring or near the swing end of the leaf spring; or there are multiple support assemblies, which are located on opposite sides of the center of the leaf spring.

[0020] In the technical solution of this utility model, the test fixture includes a support assembly. The first support end of the support assembly abuts against the vehicle frame, and the second support end abuts against the leaf spring. Through the limiting of the support assembly, a rigid connection is formed between the leaf spring and the vehicle frame, preventing the leaf spring from moving relative to the vehicle frame during the test. This eliminates the influence of interference between the leaf spring and the steering system on straight-line stability, making it easier for testers to identify and locate the cause of poor straight-line stability more quickly and accurately. In addition, the distance between the first support end and the second support end in this solution is adjustable, so that the support assembly can be adapted to various vehicle models with different distances between the leaf spring and the vehicle frame, improving the versatility of this test fixture. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of the test fixture provided by this utility model in conjunction with the vehicle frame and leaf spring;

[0023] Figure 2 A schematic diagram of the structure of the test fixture provided by this utility model;

[0024] Figure 3 Another structural schematic diagram of the test fixture provided by this utility model;

[0025] Figure 4 An exploded view of the test fixture provided by this utility model;

[0026] Figure 5 A schematic diagram of the support component in the test fixture provided by this utility model.

[0027] Explanation of icon numbers:

[0028] 10. Support assembly; 20. Frame; 30. Leaf spring; 40. Cross point; 100. Support member; 110. First support end; 120. Second support end; 130. First longitudinal beam; 140. Second longitudinal beam; 150. First crossbeam; 160. Second crossbeam; 170. Extension; 200. Connecting structure; 210. First U-bolt; 220. Connecting hole; 230. First fastener; 240. First connecting piece; 250. Second U-bolt; 260. Mounting hole; 270. Second fastener; 280. Second connecting piece.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] To improve the accuracy and efficiency of vehicle straight-line stability testing, this technical solution proposes a test fixture for limiting the leaf spring 30 and the vehicle frame 20. The test fixture includes a support assembly 10, which has a first support end 110 and a second support end 120 spaced apart. The first support end 110 abuts against the vehicle frame 20, and the second support end 120 abuts against the leaf spring 30. The distance between the first support end 110 and the second support end 120 is adjustable.

[0034] In the technical solution of this utility model, the test fixture includes a support component 10. The first support end 110 of the support component 10 abuts against the frame 20, and the second support end 120 abuts against the leaf spring 30. Through the limiting of the support component 10, a rigid connection is formed between the leaf spring 30 and the frame 20, preventing the leaf spring 30 from moving relative to the frame 20 during the test. This eliminates the influence of the interference between the leaf spring 30 and the steering system on straight-line stability, making it easier for testers to identify and locate the cause of poor straight-line stability more quickly and accurately. In addition, the distance between the first support end 110 and the second support end 120 in this solution is adjustable, so that the support component 10 can be adapted to various vehicle models with different distances between the leaf spring 30 and the frame 20, improving the versatility of this test fixture.

[0035] Specifically, such as Figure 1 This test fixture includes a support assembly 10, which can be disposed in the gap between the frame 20 and the leaf spring 30, such as... Figure 2 As shown, the support assembly 10 can be a frame or similar structure. The support assembly 10 has a first support end 110 at the top and a second support end 120 at the bottom. The first support end 110 abuts against the bottom of the frame 20, and the second support end 120 abuts against the top of the leaf spring 30. By limiting the support assembly 10, deformation of the leaf spring 30 near the frame 20 can be prevented. Thus, during straight-line stability testing, the leaf spring 30 will not undergo longitudinal torsion or upward jump, eliminating the possibility of interference between the leaf spring 30 and the steering system (mainly the steering tie rod), thereby ensuring the accuracy of the test results. In addition, since the interference factors of the leaf spring 30 are eliminated, the testers can more easily locate the causes affecting straight-line stability, which is conducive to improving the efficiency of the test. In addition, the spacing between the multiple first support ends 110 and the second support ends 120 in this solution is adjustable. The support assembly 10 can adopt a jack-like structure. By adjusting the spacing between the first support ends 110 and the second support ends 120, the first support end 110 is tightly abutted against the frame 20, and the second support end 120 is tightly abutted against the leaf spring 30. This ensures the stability of the relative position between the leaf spring 30 and the frame 20 during the test, and also makes the support assembly 10 adaptable to various vehicle models with different spacing between the leaf spring 30 and the frame 20, thereby improving the versatility of the test fixture.

[0036] like Figure 2 and Figure 3 In one embodiment of this utility model, the support component 10 includes:

[0037] Support member 100, two support members 100 are provided, the two support members 100 are arranged crosswise and rotatably connected with the intersection point 40 as the axis. The two ends of the two support members 100 above the intersection point 40 cooperate to form a first support end 110 and abut against the frame 20. The two ends of the two support members 100 below the intersection point 40 cooperate to form a second support end 120 and abut against the leaf spring 30.

[0038] The connecting structure 200 is connected to the support member 100 and is used to adjust the intersection angle of the two support members 100 so that the distance between the first support end 110 and the second support end 120 is adjustable.

[0039] like Figure 2 and Figure 3 The support member 100 can be a square frame or a strip plate, etc. Two support members 100 are provided, arranged in an X-shape. They are rotatably connected at the intersection point 40 by a hinge or bolt, allowing the two support members 100 to rotate about the intersection point 40 as an axis, thereby adjusting the included angle between the two support members 100. Figure 2The first support end 110 is formed on the two ends of the two support members 100 above the intersection point 40, and the second support end 120 is formed on the two ends of the two support members 100 below the intersection point 40. The first support end 110 and the second support end 120 are arranged parallel to each other, which ensures that the first support end 110 fully abuts against the frame 20, while the second support end 120 also fully abuts against the leaf spring 30. This ensures that the support assembly 10 has sufficient contact and support for the frame 20 and the leaf spring 30, which is beneficial to ensuring the support effect of the support assembly 10. In addition, the two ends of the first support end 110 are horizontally... The direction is flat, which makes the force on the support 100 at the intersection 40 more uniform. This avoids the force on the support assembly 10 not being perpendicular to the frame 20 and leaf spring 30 due to unevenness at the ends, thus improving its stability during testing. In addition, the support assembly 10 is also provided with a connecting structure 200. The connecting structure 200 can be a bolt or other connector. The connecting structure 200 can be screwed together with the ends of the two support 100 on the same side. By changing the bolts of different lengths, the intersection angle of the two support 100 can be adjusted, so that the distance between the first support end 110 and the second support end 120 is adjustable. In this design, by setting two support members 100, both of which can abut against the leaf spring 30 and the frame 20, the force during the test can be distributed between the two support members 100, reducing local stress and improving the reliability of the support member 100. In addition, the support members 100 are arranged in a cross pattern and are hinged to each other, which has the characteristics of simple structure and convenient spacing adjustment. It can also make the two support members 100 support each other, improving the stability of the support assembly 10.

[0040] like Figure 2 The intersection point 40 is located at the midpoint of the line connecting the first support end 110 and the second support end 120 in the vertical direction. That is, the intersection point 40 is located at the center of the overall height of the support assembly 10. Placing the intersection point 40 at the midpoint ensures torque balance between the upper and lower ends of the support assembly 10 when under stress. This ensures uniform force transmission between the first support end 110 and the second support end 120, enhancing the load-bearing capacity and service life of the support assembly 10. Furthermore, the intersection point 40's central location creates a symmetrical structural layout in the height direction, resulting in better stability during use and ensuring effective support for the frame 20 and the leaf spring 30.

[0041] like Figure 3 and Figure 4 One structural form of the connection structure 200 is shown. In this embodiment, the connection structure 200 includes:

[0042] The first U-bolt 210 is provided in multiple forms, and the center distance of the multiple first U-bolts 210 is different;

[0043] The connecting hole 220 includes a first connecting sub-hole and a second connecting sub-hole. One of the two support members 100 is provided with the first connecting sub-hole, and the other of the two support members 100 is provided with the second connecting sub-hole. The first connecting hole and the second connecting hole are located on the same side of the intersection point 40. The first connecting hole and the second connecting hole are connected by one of a plurality of first U-bolts 210 to adjust the intersection angle of the two support members 100.

[0044] The connecting hole 220 can be located at one end of the support member 100 above the intersection point 40, i.e., the first support end 110. The connecting hole 220 includes a first connecting sub-hole and a second connecting sub-hole, which are respectively located on the two support members 100. The connecting holes 220 extend along the width direction of the support member 100 (in this scheme, the width direction is the width direction of the leaf spring 30). The first connecting sub-hole and the second connecting sub-hole are arranged parallel to each other. The connecting structure 200 includes multiple first connecting holes with different center distances (the distance between the centers of two parallel ends of the U-bolt). A U-bolt 210 is provided, with its two ends passing through a first connecting sub-hole and a second connecting sub-hole, respectively. The relative rotation of the two support members 100 is restricted by the limiting relationship between the first U-bolt 210 and the connecting hole 220, thereby achieving the effect of fixing the support member 100. When it is necessary to adjust the distance between the first support end 110 and the second support end 120, it is only necessary to replace the first U-bolt 210 with a different center distance. The operation is convenient and quick, which helps to improve testing efficiency. Moreover, the structure is simple, which helps to reduce the processing cost of the test fixture.

[0045] In addition, such as Figure 3 and Figure 4 As shown, in order to further improve the reliability of the connection between the connecting structure 200 and the support member 100, the connecting structure 200 also includes a first fastener 230. The first fastener 230 and the first U-bolt 210 are respectively disposed on both sides of the support member 100, and the first fastener 230 and the first U-bolt 210 are screwed together. In this solution, the first fastener 230 can be in the form of a nut. After the two ends of the first U-bolt 210 pass through the connecting hole 220, the two ends can be screwed together with a first fastener 230. By using the middle bent part of the first U-bolt 210 to cooperate with the first fastener 230 to clamp the two ends of the support member 100, the first U-bolt 210 can be limited. The screwing method not only facilitates the disassembly and assembly of the connecting structure 200, but also ensures the reliability of the connection.

[0046] In addition, such as Figure 3 and Figure 4To distribute the stress, in another embodiment, the connecting structure 200 further includes a first connecting piece 240. The first connecting piece 240 and the first U-bolt 210 are respectively disposed on both sides of the support member 100, and the two ends of the support member 100 are respectively sleeved on the two ends of the first U-bolt 210. The first connecting piece 240 has a strip-shaped structure, and through holes can be provided at both ends of the first connecting piece 240. Through the through holes, it is sleeved on the two ends of the first U-bolt 210. When the two support members 100 are under pressure, the ends on the same side of the two support members 100 tend to move away from each other. At this time, the bent part in the middle of the first U-bolt 210 and the first connecting piece 240 work together to limit this tendency, and the pressure can also be distributed to the first U-bolt 210 and the first connecting piece 240. This reduces the concentration of force and helps to improve the load-bearing capacity and stability of the support assembly 10.

[0047] To further disperse the force, in another embodiment, the connection structure 200 includes:

[0048] The second U-bolt 250 is provided in multiple forms, and the center distance of the multiple second U-bolts 250 is different.

[0049] Mounting hole 260 includes a first mounting sub-hole and a second mounting sub-hole. One of the two support members 100 is provided with a first mounting sub-hole, and the other of the two support members 100 is provided with a second mounting sub-hole. Multiple first mounting sub-holes and multiple second mounting sub-holes are provided at intervals along the vertical direction. Second U-bolt 250 selectively connects one of the multiple first mounting sub-holes and one of the multiple second mounting holes to adjust the cross angle of the two support members 100.

[0050] The mounting hole 260 can be located at one end of the support member 100 below the intersection point 40, i.e., the second support end 120. The mounting hole 260 includes a first mounting sub-hole and a second mounting sub-hole, which are respectively located on the two support members 100. The mounting hole 260 and the connecting hole 220 are symmetrically arranged about the intersection point 40 and both extend along the width direction of the support member 100. The first mounting sub-hole and the second mounting sub-hole are also arranged parallel to each other. The second U-bolt 250 can be completely identical to the first U-bolt 210, and multiple different types of bolts can be provided. The type of center spacing, the matching method of the second U-bolt 250 and the mounting hole 260 is the same as the matching method of the first U-bolt 210 and the connecting hole 220, and will not be repeated here; by adding the mounting hole 260 and the second U-bolt 250, both the first support end 110 and the second support end 120 can be supported, which further improves the structural stability of the support assembly 10, and the first U-bolt 210 and the second U-bolt 250 can jointly disperse the force, which is conducive to further improving the structural strength and load-bearing capacity of the support assembly 10.

[0051] In addition, such as Figure 3 and Figure 4 In another embodiment, the connection structure 200 further includes a second fastener 270, which and the second U-bolt 250 are respectively disposed on both sides of the support member 100, and the second fastener 270 and the second U-bolt 250 are screwed together. In this solution, the second fastener 270 can be exactly the same as the first fastener 230, which can be a nut of the same specification. After the two ends of the second U-bolt 250 pass through the mounting hole 260, the two ends can be screwed together with a second fastener 270, which can also improve the reliability of the connection of the second U-bolt 250.

[0052] like Figure 3 and Figure 4 In another embodiment, the connecting structure 200 further includes a second connecting piece 280. The second connecting piece 280 and the second U-bolt 250 are respectively disposed on both sides of the support member 100, and the two ends of the support member 100 are respectively sleeved on the two ends of the second U-bolt 250. The second connecting piece 280 may also be completely identical to the first connecting piece 240. By using the second connecting piece 280 and the two ends of the second U-bolt 250 for limiting, the force on the second U-bolt 250 can also be distributed, thereby improving the overall strength of the support assembly 10.

[0053] like Figure 5 As shown, in one embodiment, the support member 100 is configured as a square frame structure formed by alternating horizontal and vertical beams, with the vertical beams of the two support members 100 hinged together. The square frame structure of the support member 100 improves its compressive and torsional resistance, ensuring sufficient strength while reducing its weight and material usage, thus lowering its processing cost. Furthermore, the vertical beams of the two support members 100 are hinged together using bolts, facilitating assembly and ensuring structural strength after assembly.

[0054] like Figure 5 As shown, in one embodiment, the support member 100 further includes an extension 170, which protrudes from the longitudinal beam and is flush with the transverse beam; each support member 100 includes a first longitudinal beam 130 and a second longitudinal beam 140 disposed opposite to each other, and the surface of the first longitudinal beam 130 facing away from the second longitudinal beam 140 is provided with the extension 170; the second longitudinal beam 140 of the other support member 100 is disposed on the side of one of the first longitudinal beams 130 where the extension 170 is provided, so that the support lengths of the two support members 100 on the same side of the intersection 40 are the same.

[0055] In this design, the two support members 100 can have identical structures to reduce processing complexity and costs. Each support member 100 has a first longitudinal beam 130 and a second longitudinal beam 140 arranged opposite each other, parallel and spaced apart. The support member 100 also has a first crossbeam 150 and a second crossbeam 160 arranged opposite each other. The first crossbeam 150 is located at one end abutting the frame 20, and the second crossbeam 160 is located at one end abutting the leaf spring 30, parallel and spaced apart. An extension 170 is provided on the surface of the first longitudinal beam 130 of the support member 100 away from the second longitudinal beam 140. The extension 170 can be located at both ends of the first longitudinal beam 130 and flush with the first crossbeam 150 and the second crossbeam 160, respectively. This allows the extension 170 to also abut against the frame 20 and the leaf spring 30. In addition, the two support members 100 are placed in opposite directions. Let one support member 100 be A and the other support member 100 be B. The extension 170 is set on one side of the first longitudinal beam 130 of A, and the second longitudinal beam 140 of B is set on the side of the second longitudinal beam 140 of A facing the first longitudinal beam 130. The first longitudinal beam 130 of B is set on the side of the first longitudinal beam 130 of B. That is, the extension 170 on the first longitudinal beam 130 of B is located on the side facing the second longitudinal beam 140 of A. By adjusting the size of the protrusion of the extension 170, the two support members 100 abut against the frame 20 at the first support end 110 with the same length, and the two support members 100 abut against the leaf spring 30 at the second support end 120 with the same length. By adding the extension 170, the contact area between the support assembly 10 and the frame 20 and leaf spring 30 can be further increased, reducing local stress and improving the load-bearing capacity of the support assembly 10; in addition, it also ensures that when the support assembly 10 is under stress, the two support members 100 can evenly distribute the load, avoiding uneven stress caused by inconsistent support lengths, and improving the structural stability of the entire support assembly 10. The first support end 110 and the second support end 120 are in the height direction of the vehicle ( Figure 1 The projections in the vertical direction are overlapping, and the force-bearing areas of the first support end 110 and the second support end 120 are also overlapping, ensuring that the force transmission of the support component 10 as a whole is in the vertical direction, eliminating the hidden danger of the support component 10 flipping after being subjected to force, and also helping to improve the stability of the support component 10.

[0056] like Figure 1As shown, in this embodiment, only one support component 10 may be provided. When only one is provided, the support component 10 can be placed at the center of the leaf spring 30 or near the swinging end of the leaf spring 30 to limit the swinging of the leaf spring 30. This solution is suitable for situations where the leaf spring 30 is short or the force is not large. Of course, multiple support components 10 may also be provided. When multiple support components 10 are provided, they can be placed on both sides of the center of the leaf spring 30, which can provide support over a larger area and ensure the stability of the leaf spring 30 at multiple key positions. This is suitable for situations where the leaf spring 30 is long or the force is more dispersed. The number and placement of the support components 10 can be flexibly adjusted according to the specific shape and force distribution of the leaf spring 30 to adapt to different vehicle models and testing requirements, and are not limited here.

[0057] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A test fixture for limiting the leaf spring and the vehicle frame, characterized in that, The test fixture includes a support assembly, which has a first support end and a second support end spaced apart. The first support end is used to abut against the vehicle frame, and the second support end is used to abut against the leaf spring. The distance between the first support end and the second support end is adjustable.

2. The test fixture of claim 1, wherein, The support components include: The support member has two parts, which are arranged crosswise and rotatably connected around the intersection point. The two ends of the two support members above the intersection point cooperate to form the first support end and abut against the frame. The two ends of the two support members below the intersection point cooperate to form the second support end and abut against the leaf spring. A connecting structure is connected to the support member to adjust the intersection angle of the two support members so that the distance between the first support end and the second support end is adjustable.

3. The test fixture of claim 2, wherein, The intersection point is located at the midpoint of the line connecting the first support end and the second support end in the vertical direction.

4. The test fixture of claim 2, wherein, The connection structure includes: The first U-bolt is provided in multiple forms, and the center distance of the multiple first U-bolts is different; The connecting hole includes a first connecting sub-hole and a second connecting sub-hole. One of the two support members is provided with the first connecting sub-hole, and the other of the two support members is provided with the second connecting hole. The first connecting hole and the second connecting hole are located on the same side of the intersection point. The first connecting hole and the second connecting hole are connected by one of the plurality of first U-bolts to adjust the intersection angle of the two support members.

5. The test fixture of claim 4, wherein, The connecting structure further includes a first fastener, which is disposed on both sides of the support member and the first U-bolt is screwed to the first U-bolt; and / or, the connecting structure further includes a first connecting piece, which is disposed on both sides of the support member and the first U-bolt is screwed to the first U-bolt.

6. The test fixture of claim 4 or claim 5, wherein, The connection structure includes: The second U-bolt is provided in multiple forms, and the center distance of the multiple second U-bolts is different; The mounting holes include a first mounting sub-hole and a second mounting sub-hole. One of the two support members is provided with the first mounting sub-hole, and the other of the two support members is provided with the second mounting sub-hole. Both the first mounting sub-hole and the second mounting sub-hole are provided in multiples at intervals along the vertical direction. The second U-bolt selectively connects one of the multiple first mounting sub-holes and one of the multiple second mounting holes to adjust the intersection angle of the two support members.

7. The test fixture of claim 6, wherein, The connecting structure further includes a second fastener, which is disposed on both sides of the support member and the second U-bolt is screwed to the second U-bolt; and / or, the connecting structure further includes a second connecting piece, which is disposed on both sides of the support member and the second U-bolt is screwed to the second U-bolt.

8. The test fixture of claim 2, wherein, The support member is configured as a square frame structure formed by alternating horizontal beams and vertical beams, and the vertical beams of the two support members are hinged.

9. The test fixture of claim 8, wherein, The support member further includes an extension portion, which protrudes from the longitudinal beam and is flush with the cross beam; each support member includes a first longitudinal beam and a second longitudinal beam disposed opposite to each other, and the extension portion is provided on the surface of the first longitudinal beam facing away from the second longitudinal beam; the second longitudinal beam of the other support member is provided on the side of one of the first longitudinal beams where the extension portion is provided, so that the support lengths of the two support members on the same side of the intersection are the same.

10. The test fixture of claim 1, wherein, The support assembly is provided at one location, located at the center of the leaf spring or near the swing end of the leaf spring; or multiple support assemblies are provided, located on opposite sides of the center of the leaf spring.

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