Vehicle chassis misapplication test fixture

Abstract

The utility model provides a kind of vehicle chassis misaction test tool, it includes two positioning blocks of interval arrangement, the step block being arranged between two described positioning blocks and the two support blocks of connecting described positioning block and described step block, the inner cavity is formed in the inside of described step block, the inner cavity forms movable mouth in at least one side of described step block, movable block and driving mechanism connected with the movable block are provided in the inner cavity, at least a part of the movable block protrudes the movable mouth, the driving mechanism makes the movable block move to the inside or the outside direction of the movable mouth, the two sides of the support block are respectively with the movable hinge joint of the positioning block and the step block. The utility model can quickly adjust the height of step block by driving mechanism, to simulate different convex obstacles, can satisfy chassis misaction test demand, and installation mode is more flexible, and the requirement of site is lower.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle testing equipment, specifically to a testing fixture for vehicle chassis malfunctions. Background Technology

[0002] During vehicle operation, vehicles may encounter special road conditions such as deep potholes, high embankments, or bumps. If the vehicle is not operated properly, the chassis may accidentally come into contact with the obstacle, causing deformation or failure of chassis structural components or sensor components. In order to improve product performance, the working conditions that cause chassis malfunctions are often simulated during the development of automotive chassis.

[0003] Current testing methods are mostly based on static or fixed obstacle models, such as rigid components like cement blocks and welded steel pipes to simulate road surface protrusions. These methods mainly rely on vehicles running over obstacles at a set speed in a test track to simulate chassis interference impact. Such fixtures are either structurally rigid and fixed, cannot be flexibly adjusted according to the vehicle's chassis height, or require frequent fixture changes to simulate different scenarios, resulting in low testing efficiency. Patent application CN202222464165.7 discloses a test platform for automotive chassis misuse conditions, including a cover plate flush with the ground with rectangular holes; a receiving groove below the cover plate containing an adjustable step plate that can extend from the rectangular holes to simulate steps of different heights. While this technical solution can simulate different scenarios to some extent, it requires placement in a pit in the ground, placing high demands on the test site. Furthermore, the simulated height range of the step plate is limited, and its installation position is fixed, making it difficult to meet the testing needs of different chassis misuse scenarios. Summary of the Invention

[0004] To address the aforementioned issues, this utility model provides a vehicle chassis malfunction testing fixture. This fixture can be quickly adjusted in height and has a flexible installation method, making it suitable for dynamic collision force testing in various typical scenarios, such as single-wheel collision, double-wheel collision, braking and non-braking.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A vehicle chassis malfunction testing fixture includes two spaced-apart positioning blocks, a step block disposed between the two positioning blocks, and two support blocks connecting the positioning blocks and the step block. The step block has an internal cavity, with a movable opening formed on at least one side of the cavity. A movable block and a drive mechanism connected to the movable block are disposed within the cavity. At least a portion of the movable block extends out of the movable opening. The drive mechanism causes the movable block to move inward or outward from the movable opening. Each side of the step block has an upper hinge portion, with at least one upper hinge portion formed at the outer end of the movable block extending out of the movable opening. The positioning block has a lower hinge portion on its side near the step block. The support blocks have upper and lower mating portions on opposite sides, respectively, with the upper and lower mating portions rotatably connected to the upper and lower hinge portions, respectively.

[0006] Furthermore, the driving mechanism includes a cylinder, and the piston rod of the cylinder is fixedly connected to the movable block.

[0007] Furthermore, the drive mechanism includes a gear and a motor connected to the gear, and the movable block is provided with a rack that meshes with the gear.

[0008] Furthermore, the stepped block has two movable blocks inside, which are respectively located on the upper and lower sides of the gear. The inner cavity forms a movable opening on each of the opposite sides of the stepped block, and the two movable blocks correspond to the two movable openings respectively. The two upper hinged parts are respectively formed at the outer ends of the two movable blocks.

[0009] Furthermore, the movable block is provided with a limiting part whose size is larger than that of the movable opening.

[0010] Furthermore, the positioning block is provided with positioning holes.

[0011] Furthermore, at least one of the support blocks is provided with a force sensor.

[0012] Furthermore, the upper hinge portion includes a plurality of upper hinge blocks arranged in a straight line at intervals and an upper hinge shaft passing through all the upper hinge blocks in sequence, with upper hinge grooves formed between adjacent upper hinge blocks. The upper mating portion includes a plurality of upper mating blocks arranged in a straight line at intervals, with each upper mating block corresponding to one of the upper hinge grooves and rotatably connected to the upper hinge shaft.

[0013] Furthermore, the lower hinge portion includes a plurality of lower hinge blocks arranged in a straight line at intervals and a lower hinge shaft passing through all the lower hinge blocks in sequence, and a lower hinge groove is formed between adjacent lower hinge blocks. The lower mating portion includes a plurality of lower mating blocks arranged in a straight line at intervals, and the lower mating blocks correspond one-to-one with the lower hinge grooves and are rotatably connected to the lower hinge shaft.

[0014] Furthermore, the lower hinge groove includes a transverse limiting surface and a longitudinal limiting surface that are connected at right angles to each other, and the lower mating block is restricted to rotating within a 90° range formed between the transverse limiting surface and the longitudinal limiting surface.

[0015] The following beneficial effects can be achieved by applying this utility model: 1. In use, this utility model fixes two positioning blocks to the foundation, and two support blocks support the step block upwards, forming a raised obstacle for chassis misoperation testing. With the positioning blocks fixed, the movable block is moved by the drive mechanism, which changes the distance between the two upper hinge parts of the step block, thereby changing the support angle of the support block. The change in the angle of the support block will cause the height of the step block to change, thus realizing the height adjustment of the obstacle, adapting to different testing needs and improving testing efficiency.

[0016] 2. The installation of this utility model is relatively flexible. Multiple fixtures can be used in combination. For example, installing two fixtures side by side can increase the width of the raised obstacle. Installing two fixtures at intervals can enable double-wheel passage tests, which makes the testing more flexible. Installation can be achieved simply by fixing the positioning block, which requires less space.

[0017] 3. This utility model can install a force sensor in the support block to collect the load force changes when the wheel passes over it in real time, providing more comprehensive data for chassis misoperation analysis. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model; Figure 2 for Figure 1 Schematic diagram of the middle step block; Figure 3 for Figure 1 Schematic diagram of the middle positioning block; Figure 4 This is a schematic diagram of the internal structure of the step block in one embodiment; Figure 5 This is a schematic diagram of the internal structure of the step block in another embodiment; Figure 6 This is a schematic diagram of the internal structure of the step block in another embodiment; 1-Location block, 11-Location hole, 12-Lower hinge part, 121-Lower hinge block, 122-Lower hinge groove, 1221-Transverse limiting surface, 1222-Longitudinal limiting surface, 123-Lower hinge shaft, 2-Step block, 21-Upper hinge part, 211-Upper hinge block, 212-Upper hinge groove, 213-Upper hinge shaft, 22-Inner cavity, 23-Modible block, 231-Rack, 24-Drive mechanism, 241-Cylinder, 242-Gear, 3-Support block, 31-Upper mating part, 311-Upper mating block, 32-Lower mating part, 321-Lower mating block. Detailed Implementation

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example

[0020] Reference Figures 1-3An embodiment of this utility model provides a vehicle chassis malfunction testing fixture, which includes two positioning blocks 1 spaced apart, a step block 2 disposed between the positioning blocks 1, and two support blocks 3 connecting the positioning blocks 1 and the step block 2. The positioning blocks 1 are provided with a plurality of positioning holes 11 for fixing the positioning blocks 1 to the foundation, thus achieving fixed installation of the fixture. A lower hinge portion 12 is provided on the side of the positioning block 1 near the step block 2. An upper hinge portion 21 is provided on each opposite side of the step block 2. Upper mating portions 31 and lower mating portions 32 are respectively provided on both sides of the support blocks 3. The upper mating portions 31 are rotatably connected to the upper hinge portions 21, and the lower mating portions 32 are rotatably connected to the lower hinge portions 12. When the distance between the two positioning blocks 1 is less than the total connection length of the step block 2 and the two support blocks 3, the support blocks 3 and the positioning blocks 12 are connected. An angle is formed between blocks 1, and two support blocks 3 support the step block 2 upwards. By changing the angle between the support block 3 and the positioning block 1, the height of the step block 2 can be changed, thus adjusting the height of the raised obstacle. In this embodiment, an inner cavity 22 is formed inside the step block 2, and an movable opening is formed on the side of the inner cavity 22. A movable block 23 is provided in the inner cavity, and the end of the movable block 23 extends from the movable opening on the side of the step block. The movable block is connected to a drive mechanism 24, which changes the extension distance of the movable block 23. At least one upper hinge 21 is provided at the outer end of the movable block 23, so that the distance between the two upper hinges 21 changes when the movable block moves, thereby changing the angle between the support block 3 and the positioning block 1 when the positioning block is fixed to the foundation, thus changing the height of the step block. This utility model can achieve the height adjustment of the raised obstacle by remotely controlling the drive mechanism, without removing the positioning block from the foundation. The adjustment speed is fast and can adapt to different chassis misoperation test requirements.

[0021] This utility model also provides several specific configurations of the movable block 23 and the drive mechanism 24: In the first embodiment, a movable block 23 is provided in the inner cavity 22. The inner cavity forms a movable opening on one side of the stepped block 2. The outer end of the movable block 23 extends out from the movable opening. The movable block is provided with a limiting part with a size larger than the movable opening to prevent the movable block from detaching from the inner cavity. One upper hinge part is provided at the outer end of the movable block, and the other upper hinge part is fixedly connected to the outer shell of the stepped block 2. A cylinder 241 is connected to the inner end of the movable block 23. The cylinder is connected to the movable block 23 through a piston rod, thereby pushing the movable block 23 outward or pulling it inward to realize the height adjustment of the stepped block 2. In the second embodiment, a movable block 23 is provided in the inner cavity 22. The inner cavity forms a movable opening on one side of the step block 2. The outer end of the movable block 23 extends out from the movable opening. One upper hinge part is provided at the outer end of the movable block, and the other upper hinge part is fixedly connected to the outer shell of the step block 2. A rack 231 is provided at the inner end of the movable block. The rack 231 meshes with a gear 242. The gear 242 is connected to a motor. By driving the gear to rotate through the motor, the height of the step block 2 can be adjusted. In the third embodiment, two movable blocks 23 are provided in the inner cavity 22. The inner cavity forms a movable opening on each of the two opposite sides of the step block 2. The outer ends of the two movable blocks 23 extend from the two movable openings respectively. Two upper hinge parts are respectively provided at the outer ends of the two movable blocks 23. A gear 242 is provided in the inner cavity 22. The gear 242 is connected to a motor. A rack 231 is provided on the inner side of each of the two movable blocks 23. The two racks 231 mesh with the gear 242 from the upper and lower sides respectively. When the gear rotates, the two movable blocks generate opposite movements, thereby realizing the height adjustment of the step block 2.

[0022] In some embodiments, the upper hinge portion 21 includes a plurality of upper hinge blocks 211 arranged in a straight line at intervals and an upper hinge shaft 213 passing through all the upper hinge blocks in sequence, with upper hinge grooves 212 formed between adjacent upper hinge blocks. The lower hinge portion 12 includes a plurality of lower hinge blocks 121 arranged in a straight line at intervals and a lower hinge shaft 123 passing through all the lower hinge blocks in sequence, with lower hinge grooves 122 formed between adjacent lower hinge blocks 121. The upper mating portion 31 includes a plurality of upper mating blocks 311 arranged in a straight line at intervals, and the lower mating portion 32 includes a plurality of lower mating blocks 321 arranged in a straight line at intervals. The upper mating blocks correspond one-to-one with the upper hinge grooves and are rotatably connected to the upper hinge shafts, and the lower mating blocks correspond one-to-one with the lower hinge grooves and are rotatably connected to the lower hinge shafts.

[0023] Based on the actual needs of use, when the support height is at its minimum, the positioning block 1 and the support block 3 are in a parallel and coplanar state. When the support height is at its maximum, the positioning block 1 and the support block 3 are in a perpendicular state. Therefore, the lower hinge part 12 can be provided with a right-angled transverse limiting surface and a longitudinal limiting surface. When the support block abuts against the transverse limiting surface, the support height is at its minimum. When the support block abuts against the longitudinal limiting surface, the support height is at its maximum.

[0024] In some implementations, a force sensor can be installed in one of the support blocks to collect real-time data on the load force changes when the wheel passes over it, which can provide more comprehensive data for chassis misoperation analysis.

[0025] This utility model can be equipped with multiple fixtures according to testing needs. For example, in one test, two fixtures can be fixed side by side so that the sides of the two step blocks 2 fit together, thereby increasing the width of the raised obstacle. In another test, two fixtures can be set at intervals. When the vehicle passes through, the two fixtures correspond to the wheel positions on both sides of the vehicle to achieve a two-wheel passage test.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vehicle chassis malfunction testing fixture, characterized in that: The device includes two positioning blocks (1) spaced apart, a step block (2) disposed between the two positioning blocks, and two support blocks (3) connecting the positioning blocks (1) and the step block (2). The step block (2) has an inner cavity (22) formed inside. The inner cavity forms a movable opening on at least one side of the step block. A movable block (23) and a drive mechanism (24) connected to the movable block are disposed in the inner cavity (22). At least a portion of the movable block extends out of the movable opening. The drive mechanism causes the movable block to move inward or outward from the movable opening. The step block (2) is moved laterally. Both sides of the step block (2) are provided with upper hinge parts (21). At least one of the upper hinge parts (21) is formed at the outer end of the movable block (23) that extends out of the movable opening. The positioning block (1) is provided with a lower hinge part (12) on the side near the step block (2). The support block (3) is provided with an upper mating part (31) and a lower mating part (32) on opposite sides. The upper mating part (31) and the lower mating part (32) are rotatably connected to the upper hinge part (21) and the lower hinge part (12) respectively.

2. The vehicle chassis malfunction testing fixture according to claim 1, characterized in that: The drive mechanism (24) includes a cylinder (241), and the piston rod of the cylinder is fixedly connected to the movable block (23).

3. The vehicle chassis malfunction testing fixture according to claim 1, characterized in that: The drive mechanism (24) includes a gear (242) and a motor connected to the gear, and the movable block (23) is provided with a rack (231) that meshes with the gear (242).

4. The vehicle chassis malfunction testing fixture according to claim 3, characterized in that: The step block (2) is provided with two movable blocks (23) inside. The two movable blocks are respectively located on the upper and lower sides of the gear (242). The inner cavity (22) forms a movable opening on each of the opposite sides of the step block. The two movable blocks correspond to the two movable openings respectively. The two upper hinge parts (21) are respectively formed at the outer ends of the two movable blocks (23).

5. The vehicle chassis malfunction testing fixture according to claim 1, characterized in that: The movable block (23) is provided with a limiting part that is larger than the movable opening.

6. The vehicle chassis malfunction testing fixture according to claim 1, characterized in that: The positioning block (1) is provided with a positioning hole (11).

7. The vehicle chassis malfunction testing fixture according to claim 1, characterized in that: A force sensor is provided in at least one of the support blocks (3).

8. The vehicle chassis malfunction testing fixture according to claim 1, characterized in that: The upper hinge portion (21) includes a plurality of upper hinge blocks (211) arranged in a straight line at intervals and an upper hinge shaft (213) that passes through all the upper hinge blocks in sequence. An upper hinge groove (212) is formed between adjacent upper hinge blocks. The upper mating portion (31) includes a plurality of upper mating blocks (311) arranged in a straight line at intervals. The upper mating blocks (311) correspond one-to-one with the upper hinge grooves (212) and are rotatably connected to the upper hinge shaft (213).

9. The vehicle chassis malfunction testing fixture according to claim 1, characterized in that: The lower hinge portion (12) includes a plurality of lower hinge blocks (121) arranged in a straight line at intervals and a lower hinge shaft (123) that passes through all the lower hinge blocks in sequence. A lower hinge groove (122) is formed between adjacent lower hinge blocks. The lower mating portion (32) includes a plurality of lower mating blocks (321) arranged in a straight line at intervals. The lower mating blocks (321) correspond one-to-one with the lower hinge grooves (122) and are rotatably connected to the lower hinge shaft (123).

10. A vehicle chassis malfunction testing fixture according to claim 9, characterized in that: The lower hinge groove includes a transverse limiting surface (1221) and a longitudinal limiting surface (1222) that are connected at right angles to each other. The lower mating block is restricted to rotating within a 90° range formed between the transverse limiting surface and the longitudinal limiting surface.

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