A kind of automobile suspension system degree of freedom test tool

Abstract

The utility model belongs to the technical field of automobile detection equipment, disclose a kind of freedom degree test tool of automobile suspension system, including base and two respectively slidingly connected in the movable plate of base both sides, the movable slot for movable plate movement is set up on the base, two the movable plate are all fixedly connected with two first electric push rod, the protruding end of two first electric push rod on same movable plate is commonly fixedly connected with a bearing plate, the utility model is driven bearing plate by the movable plate of base both sides independently slidable cooperation its top first electric push rod, realize flexible adjustment to suspension end width interval and bearing height, and clamping assembly can accurately adjust clamping interval, so that tool can quickly adapt to the size of different vehicle models suspension, matching can be completed by simple sliding and motor drive, shorten the time of change type, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive testing equipment technology, and more specifically, to a testing fixture for the degrees of freedom of an automotive suspension system. Background Technology

[0002] Testing the degrees of freedom of an automotive suspension system is a crucial part of vehicle research and development and maintenance diagnosis. Among these tests, the test of suspension bounce is a fundamental test item. Currently, the industry often uses electric push rods to drive the suspension end to apply vertical displacement loading, thereby simulating wheel bounce conditions and collecting motion data. This test mode must ensure both the accuracy of displacement loading and the reliability of the suspension assembly's positioning during the test.

[0003] When testing suspensions of different vehicle models, the clamping spacing and height of traditional clamping mechanisms cannot be adjusted synchronously. Each time a test piece is changed, the clamps must be disassembled and reassembled or shims must be stacked. The operation process is cumbersome and time-consuming. This mechanical adaptation not only prolongs the test preparation time, but also easily leads to suspension positioning deviation. Ultimately, the displacement direction applied by the electric push rod deviates from the actual working conditions, which ultimately affects the accuracy of the test data.

[0004] In view of this, we propose a testing fixture for the degrees of freedom of an automotive suspension system. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this utility model is to provide a testing fixture for the degrees of freedom of an automotive suspension system, so as to solve the problem of poor adaptability of traditional testing fixtures for the degrees of freedom of automotive suspension systems mentioned in the background art.

[0007] 2. Technical Solution

[0008] A fixture for testing the degrees of freedom of an automotive suspension system includes a base and two movable plates slidably connected to both sides of the base. The base has movable slots for moving the movable plates. Two first electric push rods are fixedly connected to each of the two movable plates. The extended ends of the two first electric push rods on the same movable plate are fixedly connected to a support plate. The support plate is used to support the end of the automotive suspension to test the degrees of freedom of the automotive suspension by extending and retracting the first electric push rods. A mounting bracket is fixedly connected to the base, and the mounting bracket is provided with multiple clamping components. A limit component is provided on the base.

[0009] Clamping assembly for clamping the vehicle suspension from the height direction for testing;

[0010] Limiting components are used to further limit the vehicle suspension from the horizontal direction.

[0011] Preferably, the clamping assembly includes a first clamping plate and a second clamping plate slidably connected to the mounting bracket. The clamping assembly includes a bidirectional screw for driving the first clamping plate and the second clamping plate to move relative to each other. The threads at both ends of the bidirectional screw are arranged in opposite directions, and both ends of the bidirectional screw are connected to a threaded sleeve through a ball screw pair thread. The two threaded sleeves are respectively fixedly connected to the first clamping plate and the second clamping plate.

[0012] Preferably, both sides of the first clamping plate and the second clamping plate are fixedly connected to sliders with a T-shaped cross section, and the mounting frame is provided with a groove that matches the size of the slider.

[0013] Preferably, each of the plurality of bidirectional screws is fixedly connected to a pulley at its top, and the plurality of pulleys are connected to each other by a transmission belt. A motor for driving any one of the plurality of bidirectional screws to rotate is fixedly connected to the mounting bracket.

[0014] Preferably, both the first clamping plate and the second clamping plate are provided with limiting grooves for cooperating with the limiting component.

[0015] Preferably, the limiting component includes a movable block slidably connected to the base and a plurality of third electric push rods fixedly connected to the movable block, wherein the protruding ends of the plurality of third electric push rods are all fixedly connected to a limiting plate that is adapted to the size of the limiting groove.

[0016] Preferably, a plurality of sliding rods passing through the movable block are fixedly connected to the base, and a second electric push rod is fixedly connected to the base, with the extended end of the second electric push rod fixedly connected to the movable block.

[0017] 3. Beneficial effects

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] 1. This utility model uses independently sliding movable plates on both sides of the base, combined with the first electric push rod at the top to drive the bearing plate, to achieve adjustment of the width spacing and bearing height of the suspension end. The first and second clamping plates driven by bidirectional screws in the clamping assembly can precisely adjust the clamping spacing, allowing the tooling to quickly adapt to the size of suspensions of different vehicle models. Compared with the cumbersome operation of traditional tooling that requires disassembly and reassembly or shim adjustment, this structure can complete the matching through simple sliding and motor drive, which greatly shortens the changeover preparation time and improves the testing efficiency.

[0020] 2. This utility model provides a rigid guide for the clamping plate through the cooperation of the slider and the groove. Combined with the design of the third electric push rod in the limiting component to push the limiting plate into the limiting groove of the clamping plate, a stable constraint is formed in the height and horizontal directions. This effectively avoids the clamping offset, tilt or center misalignment problems commonly found in manual adjustment, ensuring that the suspension is always in the preset standard position. This allows the displacement applied by the first electric push rod to meet the test requirements when the degree of freedom is tested, thus improving the accuracy of the measurement.

[0021] 3. This utility model enables a single motor to drive multiple bidirectional screws to rotate synchronously through a belt pulley synchronous transmission system. In conjunction with the second electric push rod to control the sliding of the movable block, it realizes the synchronous adjustment of the spacing and height of multiple clamping points, which improves the convenience of operation and the accuracy of measurement, and is especially suitable for continuous suspension testing scenarios. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the clamping assembly of this utility model;

[0024] Figure 3 This is a schematic diagram of the limiting component of this utility model;

[0025] Figure 4 This is a connection diagram of the clamping assembly of this utility model;

[0026] Figure 5 This is an exploded view of the first clamping plate of this utility model.

[0027] The following are the labels in the diagram: 1. Base; 11. Movable plate; 12. Movable groove; 13. First electric push rod; 14. Bearing plate; 15. Mounting bracket; 16. Motor; 17. Pulley; 18. Transmission belt; 2. Clamping assembly; 21. Bidirectional screw; 22. Screw sleeve; 23. First clamping plate; 24. Second clamping plate; 25. Slider; 26. Slide groove; 27. Limiting groove; 3. Limiting assembly; 31. Slide rod; 32. Movable block; 33. Second electric push rod; 34. Third electric push rod; 35. Limiting plate. Detailed Implementation

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Please see Figure 1-5 This utility model provides a technical solution:

[0032] A fixture for testing the degrees of freedom of an automotive suspension system includes a base 1 and two movable plates 11 slidably connected to both sides of the base 1. The base 1 has movable slots 12 for moving the movable plates 11. Two first electric push rods 13 are fixedly connected to each of the two movable plates 11. The extended ends of the two first electric push rods 13 on the same movable plate 11 are fixedly connected to a support plate 14. The support plate 14 supports the end of the automotive suspension to test the degrees of freedom of the automotive suspension through the extension and retraction of the first electric push rods 13. A mounting bracket 15 is fixedly connected to the base 1, and multiple clamping components 2 are provided on the mounting bracket 15. Limiting groups are provided on the base 1. Component 3; Clamping assembly 2 is used to clamp the vehicle suspension from the height direction for testing; Limiting assembly 3 is used to further limit the vehicle suspension from the horizontal direction. With this configuration, the base 1 can provide overall support rigidity, the independently sliding movable plates 11 on both sides allow flexible adjustment of the suspension support width, and the dual first electric push rods 13 on each movable plate 11 achieve precise lifting and lowering of the suspension end height by synchronously driving the bearing plate 14, so that the bearing plate 14 can be adapted to more models of vehicle suspension, and the combination of the mounting bracket 15 and the clamping assembly 2 can constrain the vertical degree of freedom of the suspension, and the limiting assembly 3 further enhances the horizontal stability.

[0033] In practice, the base 1 guide rail should be a high-precision linear slide rail and equipped with a dust cover, while the sliding stroke of the movable plate 11 should cover the wheel track range of mainstream models, and the load-bearing capacity of the electric push rod should be greater than the maximum sprung mass of the suspension to ensure the test results.

[0034] The clamping assembly 2 includes a first clamping plate 23 and a second clamping plate 24 slidably connected to the mounting bracket 15. The clamping assembly 2 includes a bidirectional screw 21 for driving the relative movement of the first clamping plate 23 and the second clamping plate 24. The threads at both ends of the bidirectional screw 21 are reversed, and both ends of the bidirectional screw 21 are connected to a screw sleeve 22 through a ball screw pair thread. The two screw sleeves 22 are fixedly connected to the first clamping plate 23 and the second clamping plate 24 respectively. With this configuration, the reverse thread design of the bidirectional screw 21 transforms the single rotational motion into the symmetrical opening and closing action of the two clamping plates, realizing high-precision adjustment of the clamping distance.

[0035] Furthermore, both sides of the first clamping plate 23 and the second clamping plate 24 are fixedly connected to sliders 25 with a T-shaped cross section. The mounting bracket 15 is provided with a groove 26 that matches the size of the slider 25. This arrangement can prevent the first clamping plate 23 and the second clamping plate 24 from tilting by the cooperation of the T-shaped slider 25 and the groove 26, and enhance the stability of the first clamping plate 23 and the second clamping plate under force.

[0036] In addition, pulleys 17 are fixedly connected to the top of each of the multiple bidirectional screws 21, and the multiple pulleys 17 are connected to each other by a transmission belt 18. A motor 16 is fixedly connected to the mounting bracket 15 to drive any one of the multiple bidirectional screws 21 to rotate. With this configuration, the synchronous belt drive can be driven by a single motor 16 to realize the linkage adjustment of multiple clamping components 2, ensuring the synchronicity of the action of each clamping point, avoiding deformation of the suspension due to asymmetrical clamping, and the belt drive has a certain overload protection function. In implementation, the synchronous belt must have sufficient strength, the belt tensioning mechanism must be adjustable to maintain effective transmission, and the motor 16 should have a braking function to achieve position locking.

[0037] Secondly, both the first clamping plate 23 and the second clamping plate 24 are provided with limiting grooves 27 for cooperating with the limiting component 3. This arrangement allows the limiting grooves 27 to cooperate with the limiting plate 35 to form a limiting structure, thereby enhancing clamping stability and significantly improving the clamping effect.

[0038] Furthermore, the limiting component 3 includes a movable block 32 slidably connected to the base 1 and multiple third electric push rods 34 fixedly connected to the movable block 32. The extended ends of the multiple third electric push rods 34 are all fixedly connected to limiting plates 35 that are adapted to the size of the limiting groove 27. This arrangement enables the limiting component 3 to be quickly positioned when the movable block 32 is moved as a whole. The third electric push rods 34 drive the limiting plates 35 to embed into the limiting groove 27 of the clamping plate, forming a rigid limiting structure.

[0039] Specifically, a plurality of slide rods 31 are fixedly connected to the base 1 and pass through the movable block 32. A second electric push rod 33 is fixedly connected to the base 1. The extended end of the second electric push rod 33 is fixedly connected to the movable block 32. This arrangement ensures that the guiding structure of the slide rod 31 can guarantee the accuracy of the linear translation of the movable block 32, while the second electric push rod 33 provides a stable driving force to realize the overall position adjustment of the limit component 3.

[0040] Working principle:

[0041] When using this fixture to test the degree of freedom of the suspension, the operator first places the car suspension assembly on the two side bearing plates 14, and adjusts the lateral sliding position of the movable plates 11 on both sides of the base 1 by manual or electric drive to adapt to the width spacing of the suspension mounting points. Then, the first electric push rod 13 is started to synchronously adjust the lifting height of the two side bearing plates 14 so that the suspension is in the preset test posture. After the suspension is positioned, the motor 16 drives multiple bidirectional screws 21 to rotate synchronously through synchronous belt drive. The reverse threads at both ends of the bidirectional screws 21 drive the first clamping plate 23 and the second clamping plate 24 to move towards each other along the T-shaped slide groove 26, clamping the suspension components from the vertical direction. At this time, multiple third electric push rods 34 extend to insert the limiting plate 35 into the limiting groove 27. Then, the second electric push rod 33 drives the movable block 32 to move horizontally along the slide rod 31, so that the limiting plate 35 restricts the horizontal movement of the suspension, thereby making the movable block 32 form a rigid constraint in the horizontal direction.

[0042] After the suspension is fixed, the first electric push rods 13 on both sides are controlled to extend and retract synchronously. When the push rods extend, the bearing plate 14 is driven to lift the end of the suspension to simulate the wheel jumping condition. When it retracts, it simulates the falling and rebounding. During this process, the displacement and angle change data of the key points of the suspension are collected in real time. When the test is completed, the limit plate 35 is retracted in sequence to release the horizontal constraint, the bidirectional screw 21 is rotated in the opposite direction to release the clamping plate, and finally the bearing plate 14 is lowered to remove the suspension sample.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tooling for testing the degrees of freedom of an automotive suspension system, characterized in that: The system includes a base (1) and two movable plates (11) that are slidably connected to both sides of the base (1). The base (1) has a movable groove (12) for the movable plates (11) to move. Two first electric push rods (13) are fixedly connected to each of the two movable plates (11). The extended ends of the two first electric push rods (13) on the same movable plate (11) are fixedly connected to a support plate (14). The support plate (14) is used to support the end of the car suspension so as to test the degree of freedom of the car suspension by extending and retracting the first electric push rods (13). A mounting bracket (15) is fixedly connected to the base (1). Multiple clamping components (2) are provided on the mounting bracket (15). A limit component (3) is provided on the base (1). Clamping assembly (2) is used to clamp the vehicle suspension from the height direction for testing; Limiting component (3) is used to further limit the vehicle suspension from the horizontal direction of the vehicle suspension.

2. The testing fixture for the degrees of freedom of an automotive suspension system as described in claim 1, characterized in that: The clamping assembly (2) includes a first clamping plate (23) and a second clamping plate (24) slidably connected to the mounting bracket (15). The clamping assembly (2) includes a bidirectional screw (21) for driving the first clamping plate (23) and the second clamping plate (24) to move relative to each other. The threads at both ends of the bidirectional screw (21) are arranged in opposite directions, and both ends of the bidirectional screw (21) are connected to a screw sleeve (22) through a ball screw pair thread. The two screw sleeves (22) are fixedly connected to the first clamping plate (23) and the second clamping plate (24) respectively.

3. The testing fixture for the degree of freedom of an automotive suspension system as described in claim 2, characterized in that: Both sides of the first clamping plate (23) and the second clamping plate (24) are fixedly connected to sliders (25) with a T-shaped cross section, and the mounting bracket (15) is provided with a groove (26) that matches the size of the slider (25).

4. The testing fixture for the degrees of freedom of an automotive suspension system as described in claim 2, characterized in that: Each of the multiple bidirectional screws (21) is fixedly connected to a pulley (17), and the multiple pulleys (17) are connected to each other by a transmission belt (18). A motor (16) for driving any one of the multiple bidirectional screws (21) to rotate is fixedly connected to the mounting bracket (15).

5. The testing fixture for the degrees of freedom of an automotive suspension system as described in claim 3, characterized in that: Both the first clamping plate (23) and the second clamping plate (24) are provided with limiting grooves (27) for cooperating with the limiting component (3).

6. The testing fixture for the degree of freedom of an automotive suspension system as described in claim 5, characterized in that: The limiting component (3) includes a movable block (32) slidably connected to the base (1) and a plurality of third electric push rods (34) fixedly connected to the movable block (32). The protruding ends of the plurality of third electric push rods (34) are all fixedly connected to a limiting plate (35) that is adapted to the size of the limiting groove (27).

7. The testing fixture for the degree of freedom of an automotive suspension system as described in claim 6, characterized in that: A plurality of sliding rods (31) are fixedly connected to the base (1) and pass through the movable block (32). A second electric push rod (33) is fixedly connected to the base (1), and the extended end of the second electric push rod (33) is fixedly connected to the movable block (32).

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