A bending detection device and method for a shock absorber assembly with a long force arm

Abstract

The present invention discloses a bending detection device and method for a shock absorber assembly with a long force arm, including a box body. The box body includes a plate A and a plate B vertically connected thereto. The box body further includes a support plate vertically connected to the same side of both the plate A and the plate B. A connecting column is connected to the support plate. The connecting column includes a connecting plate parallelly installed on the side surface of the support plate and a fixing column vertically connected to the side surface of the connecting plate. A fixing through hole matching the size of the end of the shock absorber is provided at the center of the connecting column; a plurality of grooves parallel to the axis of the fixing column are provided along the circumferential direction at the end of the fixing column away from the connecting plate, and a tightening clamp block is sleeved on the outer part of the end of the fixing column. The detection device of the present invention, through the innovation of the box body and the connecting column, reliably connects two actuators and the shock absorber assembly according to the test requirements, and solves the problem that in the two-way bending fatigue durability detection process of the shock absorber assembly, the length L of the force arm is greater than the overall length of the shock absorber body and cannot be connected.

Description

Technical Field

[0001] The present invention relates to a shock absorber detection device, and particularly to a bending detection device and method for a shock absorber assembly with a long force arm. Background Art

[0002] Bending strength is one of the key performances of a vehicle shock absorber assembly. During the design and development of the whole vehicle and the shock absorber, it is necessary to simultaneously detect the bending fatigue durability strength of the shock absorber assembly in the front-rear and left-right directions of the vehicle, and verify whether the bending fatigue durability strength of the shock absorber assembly under a certain load applied in two directions meets the product design requirements.

[0003] During the two-way bending fatigue durability detection of the shock absorber assembly, variable forces F1 and F2 in two directions need to be applied at the force application points according to the vehicle design requirements on the shock absorber assembly, so that the shock absorber assembly undergoes two-way perturbations around the lower mounting point. Due to the need for vehicle design verification, the force application points of some products are relatively close to the lower mounting point of the shock absorber assembly, and the force arm length L is greater than the overall length of the shock absorber assembly body. Therefore, there is a problem that the shock absorber assembly and the actuator cannot be connected according to the test requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that during the two-way bending fatigue durability detection of the shock absorber assembly, the force arm length L of some force application points is greater than the overall length of the shock absorber assembly body, and there is a problem that the shock absorber assembly and the actuator cannot be connected. The purpose is to provide a bending detection device and method for a shock absorber assembly with a long force arm. Through the innovation of the box body and the connecting column, two actuators and the shock absorber assembly can be reliably connected according to the test requirements, solving the problem that the force arm length L is greater than the overall length of the shock absorber assembly body and cannot be connected during the two-way bending fatigue durability detection of the shock absorber assembly, enabling the test work to be carried out according to the requirements of test verification.

[0005] The present invention is achieved by the following technical solutions:

[0006] A bending detection device for a shock absorber assembly with a long force arm according to the present invention comprises a box body. The box body includes a vertically arranged A plate and a horizontally arranged B plate perpendicularly connected to the A plate. The box body further includes a support plate perpendicularly connected to the same side of the A plate and the B plate. The A plate is used to be connected to an actuator A, and the B plate is used to be connected to an actuator B. A connecting column is connected to the side of the support plate far from the A plate and the B plate. The connecting column includes a connecting plate parallelly installed on the side surface of the support plate and a fixing column perpendicularly connected to the side surface of the connecting plate. A fixing through hole matching the size of the end of the shock absorber is provided at the center of the connecting column. An anti-interference hole coaxial with the fixing through hole and having a diameter larger than that of the fixing through hole is provided on the support plate; a plurality of grooves parallel to the axis of the fixing column are provided along the circumferential direction at the end of the fixing column far from the connecting plate. The end of the groove penetrates through the end of the fixing column and the bottom surface communicates with the fixing through hole. A fastening clamp block is sleeved outside the end of the fixing column. The fastening clamp block includes an upper clamp block and a lower clamp block, and the two ends of the upper clamp block and the lower clamp block are detachably connected.

[0007] The detection device of the present invention, through the innovation of the box body and the connecting column, reliably connects two actuators and the shock absorber assembly according to the test requirements, solves the problem that in the two-way bending fatigue durability test of the shock absorber assembly, the length L of the force arm is greater than the total length of the shock absorber body and cannot be connected, and enables the test work to be carried out according to the requirements of the test verification. Before the present invention is used, first, the A plate and the B plate of the box body are fastened to the actuator A and the actuator B. The extension lines of the forces of the actuator A and the actuator B intersect at a point with the central axis of the connecting column; the diameter of the fixing through hole is selected according to the diameter of the end of the shock absorber; the end of the shock absorber is inserted into the fixing column from the end far from the connecting plate of the fixing through hole, and then the shock absorber bracket end is fixed at an appropriate position on the MTS comprehensive test platform through the fixing tool for the shock absorber bracket end. Adjust the length of the end of the shock absorber entering the fixing through hole in the fixing column to meet the requirement of the force arm length L in the test. Finally, by clamping the fastening clamp block, the end of the fixing column and the end of the shock absorber are clamped and fixed. By applying variable forces F1 and F2 through the actuator A and the actuator B with the above structure, the shock absorber is bent under the action of the forces F1 and F2, solving the problem that the two actuators and the shock absorber cannot be connected according to the test requirements due to the fact that the force arm length L is greater than the total length of the shock absorber body, and enabling the test work to be carried out according to the requirements of the test verification. At this time, the force arm length L is the distance from the intersection point of the extension lines of the forces of the actuator A and the actuator B to the installation point of the shock absorber bracket end on the fixing tool for the shock absorber bracket end, realizing the connection between the actuator and the shock absorber when the force arm length L is greater than the total length of the shock absorber body. At the same time, the device has good versatility, can meet the detection of different shock absorbers by replacing the connecting column with a fixing through hole adapted to the shock absorber, and can be quickly installed for testing, saving the tooling production cycle and cost.

[0008] The clamping block formed by combining the upper clamping block and the lower clamping block is a hollow hexagonal block. The two ends of the upper clamping block and the lower clamping block are connected and fastened by bolts, which can improve the clamping ability of the clamping block.

[0009] One end of the fixed column where the groove is located is made of an elastic material. When the fastening clamping block clamps the end of the shock absorber at the end of the fixed column, the end of the fixed column can be further tightened in the presence of the groove, making the inner wall of the end of the fixed column fit more closely with the outer wall of the end of the shock absorber, improving the fastening of the connection.

[0010] The inner wall of the fixed through hole is covered with a rubber layer to avoid frictional damage to the outer wall of the end of the shock absorber.

[0011] A method for detecting the bending of a shock absorber assembly for a long force arm includes the following steps: 1) Install the A plate and B plate of the box body with actuator A and actuator B, ensuring that the extension lines of the forces of actuator A and actuator B intersect at a point with the central axis of the fixed through hole in the connecting column; 2) Insert the end of the shock absorber from the end away from the connecting plate into the fixed column through the fixed through hole, fix the shock absorber bracket end at an appropriate position on the MTS comprehensive test platform through the shock absorber bracket end fixing tooling, and adjust the length of the end of the shock absorber entering the fixed column to meet the requirement of the force arm length L in the test; 3) Clamp and fix the end of the fixed column and the end of the shock absorber by clamping the fastening clamping block; 4) According to the requirements of the test verification, start actuator A and actuator B to apply variable forces F1 and F2 to the force application points of the shock absorber from two directions, and the shock absorber bends under the action of forces F1 and F2.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0013] 1. The bending detection device and method for a shock absorber assembly for a long force arm of the present invention innovatively connects two actuators and the shock absorber assembly reliably according to the test requirements, solves the problem that in the two-way bending fatigue durability test of the shock absorber assembly, the force arm length L is greater than the total length of the shock absorber body and cannot be connected, enabling the test work to be carried out according to the requirements of the test verification;

[0014] 2. The bending detection device and method for a shock absorber assembly for a long force arm of the present invention, the clamping block formed by combining the upper clamping block and the lower clamping block is a hollow hexagonal block. The two ends of the upper clamping block and the lower clamping block are connected and fastened by bolts, which can improve the clamping ability of the clamping block;

[0015] 3. The bending detection device and method for a shock absorber assembly for a long force arm of the present invention has good versatility. By replacing the connecting column adapted to the shock absorber, it can meet the detection of different shock absorbers, and can be quickly installed for testing, saving the tooling production cycle and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are provided to further understand the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is an assembly drawing of the present invention and a shock absorber.

[0019] Marks in the drawings and corresponding component names:

[0020] 1 - A plate, 2 - B plate, 3 - support plate, 4 - connecting plate, 5 - fixing column, 6 - fixing through - hole, 7 - groove, 8 - fastening clamp block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not limit the present invention.

[0022] Embodiment 1

[0023] As Figure 1 shown, a bending detection device for a shock absorber assembly with a long force arm according to the present invention includes a box body. The box body includes a vertically arranged A plate 1 and a horizontally arranged B plate 2 that is perpendicularly connected to the A plate 1. The box body further includes a support plate 3 that is perpendicularly connected to the same side of the A plate 1 and the B plate 2. The A plate 1 is used to be connected to an actuator A, the B plate 2 is used to be connected to an actuator B. A connecting column is connected to the side of the support plate 3 that is far away from the A plate 1 and the B plate 2. The connecting column includes a connecting plate 4 that is parallelly installed on the side surface of the support plate 3 and a fixing column 5 that is perpendicularly connected to the side surface of the connecting plate 4. A fixing through - hole 6 that matches the size of the end of the shock absorber is provided at the center of the connecting column. An anti - interference hole that is coaxial with the fixing through - hole 6 and has a diameter larger than that of the fixing through - hole 6 is provided on the support plate 3. A plurality of grooves 7 that are parallel to the axis of the fixing column 5 are provided along the circumferential direction at the end of the fixing column 5 away from the connecting plate 4. The end of the groove 7 penetrates the end of the fixing column 5 and the bottom surface communicates with the fixing through - hole 6. A fastening clamp block 8 is sleeved on the outer part of the end of the fixing column 5. The fastening clamp block 8 includes an upper clamp block and a lower clamp block, and the two ends between the upper clamp block and the lower clamp block are detachably connected.

[0024] The detection device of the present invention, through the innovation of the box body and the connecting column, reliably connects two actuators and a shock absorber assembly according to the test requirements, solves the problem that in the two - way bending fatigue durability detection process of the shock absorber assembly, the length L of the force arm is greater than the total length of the shock absorber body and cannot be connected, enabling the test work to be carried out according to the requirements of the test verification. AsFigure 2 The figure shows an assembly drawing of the detection device and the shock absorber. Before the present invention is used, first, the A plate and the B plate of the box body are fastened to the actuator A and the actuator B. The extension lines of the forces of the actuator A and the actuator B intersect at a point with the central axis of the connecting column. The diameter of the fixing through hole is selected according to the diameter of the end of the shock absorber. The end of the shock absorber is inserted into the fixing column from the end away from the connecting plate through the fixing through hole. Then, the shock absorber bracket end is fixed at an appropriate position on the MTS comprehensive test platform through the fixing tool for the shock absorber bracket end. The length of the end of the shock absorber entering the fixing through hole in the fixing column is adjusted to meet the requirement of the force arm length L in the test. Finally, the fixing column and the end of the shock absorber are clamped and fixed by clamping the clamping block. With the above structure, variable forces F1 and F2 are applied by the actuator A and the actuator B to make the shock absorber bend under the action of the forces F1 and F2, solving the problem that because the force arm length L is greater than the total length of the shock absorber body, the two actuators and the shock absorber cannot be connected according to the test requirements, and enabling the test work to be carried out according to the requirements of the test verification. At this time, the force arm length L is the distance from the intersection point of the extension lines of the forces of the actuator A and the actuator B to the installation point of the shock absorber bracket end on the fixing tool for the shock absorber bracket end, realizing the connection between the actuator and the shock absorber when the force arm length L is greater than the total length of the shock absorber body. At the same time, this device has good versatility. By replacing the connecting column with a fixing through hole adapted to the shock absorber, the detection of different shock absorbers can be satisfied, and it can be quickly installed for testing, saving the tooling production cycle and cost.

[0025] Preferably, the fastening clamp block formed by combining the upper clamp block and the lower clamp block is a hollow hexagonal block. The two ends of the upper clamp block and the lower clamp block are connected and fastened by bolts, which can improve the clamping ability of the fastening clamp block.

[0026] Preferably, the end of the fixing column where the groove is located is made of an elastic material. When the fastening clamp block clamps the end of the shock absorber at the end of the fixing column, the end of the fixing column can be further tightened in the presence of the groove, making the inner wall of the end of the fixing column fit more closely with the outer wall of the end of the shock absorber and improving the fastening of the connection.

[0027] Preferably, a rubber layer is covered on the inner wall of the fixing through hole to avoid frictional damage to the outer wall of the end of the shock absorber.

[0028] A bending detection method for a shock absorber assembly with a long force arm, comprising the following steps: 1) Install the A plate and B plate of the box body with actuator A and actuator B, ensuring that the extension lines of the forces of actuator A and actuator B intersect at a point with the central axis of the fixed through hole in the connecting column; 2) Insert the end of the shock absorber from the end away from the connecting plate into the fixed column through the fixed through hole, fix the shock absorber bracket end at an appropriate position on the MTS comprehensive test platform through the shock absorber bracket end fixing tooling, and adjust the length of the shock absorber end entering the fixed column to meet the requirement of the force arm length L in the test; 3) Clamp and fix the end of the fixed column and the end of the shock absorber by clamping the clamping block tightly; 4) According to the requirements of the test verification, start actuator A and actuator B to apply variable forces F1 and F2 to the force application points of the shock absorber from two directions, and the shock absorber bends under the action of forces F1 and F2.

[0029] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bending detection device for a shock absorber assembly with a long force arm, characterized in that, It includes a box body, the box body includes a vertically arranged A plate (1) and a horizontally arranged B plate (2) that is perpendicularly connected to the A plate (1). The box body also includes a support plate (3) that is perpendicularly connected to the same side of the A plate (1) and the B plate (2). The A plate (1) is used to be connected to actuator A, the B plate (2) is used to be connected to actuator B. A connecting column is connected to the side of the support plate (3) that is far away from the A plate (1) and the B plate (2). The connecting column includes a connecting plate (4) that is parallelly installed on the side of the support plate (3) and a fixing column (5) that is perpendicularly connected to the side of the connecting plate (4). A fixing through hole (6) that matches the size of the end of the shock absorber is opened at the center of the connecting column. An anti-interference hole that is coaxial with the fixing through hole (6) and has a diameter larger than that of the fixing through hole (6) is opened on the support plate (3); A plurality of grooves (7) that are parallel to the axis of the fixing column (5) are opened along the circumferential direction at the end of the fixing column (5) that is far away from the connecting plate (4). The end of the groove (7) penetrates through the end of the fixing column (5) and the bottom surface communicates with the fixing through hole (6). A tightening clamp block (8) is sleeved on the outside of the end of the fixing column (5). The tightening clamp block (8) includes an upper clamp block and a lower clamp block, and the two ends between the upper clamp block and the lower clamp block are detachably connected.

2. The bending detection device for a shock absorber assembly with a long force arm according to claim 1, characterized in that, The tightening clamp block (8) formed by combining the upper clamp block and the lower clamp block is a hollow hexagonal block, and the two ends of the upper clamp block and the lower clamp block are connected and fastened by bolts.

3. The bending detection device for a shock absorber assembly with a long force arm according to claim 1, characterized in that, The end of the fixing column (5) where the groove (7) is located is made of an elastic material.

4. A bending detection device for a shock absorber assembly with a long force arm according to claim 1, characterized in that, A rubber layer is covered on the inner wall of the fixing through hole (6).

5. A bending detection method for a shock absorber assembly with a long force arm, characterized in that, It includes the following steps: 1) Install the A plate and the B plate of the box body of the detection device described in any one of claims 1-4 on actuator A and actuator B, and ensure that the extension lines of the forces of actuator A and actuator B intersect at a point with the central axis of the fixing through hole in the connecting column; 2) Insert the end of the shock absorber into the fixing column from the end of the fixing through hole that is far away from the connecting plate, fix the shock absorber bracket end at an appropriate position on the MTS comprehensive test platform through the shock absorber bracket end fixing tooling, and adjust the length of the shock absorber end entering the fixing column to meet the requirement of the force arm length L in the test. The force arm length L is greater than the total length of the shock absorber body; 3) Clamp and fix the end of the fixing column and the end of the shock absorber by clamping the tightening clamp block; 4) According to the requirements of the test verification, start actuators A and B to apply variable forces F1 and F2 to the force application points of the shock absorber from two directions, and the shock absorber bends under the action of forces F1 and F2.

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