Test tool for testing holding force of lower fork arm of shock absorber
By designing a test fixture suitable for the lower fork arm and utilizing the combined structure of clamping components and gripping parts, the problem that the lower fork arm cannot be directly tested in the existing technology is solved, and efficient and accurate clamping force detection is achieved.
Patent Information
- Application Number
- CN202520697234.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-14
AI Technical Summary
In the existing technology, the lower fork arm structure cannot be directly connected to the tensile testing machine for clamping force testing, and repeated disassembly and assembly affect the testing efficiency and accuracy.
Design a test fixture that locks the shock absorber and the lower fork arm with locking pins, and uses clamping components and grips to achieve clamping force testing without disassembling the lower fork arm. The fixture includes a combination clamping structure of arc-shaped grips, fixed sleeves and locking sleeves, which can be adapted to clamping oil reservoirs of different specifications.
This technology enables efficient and accurate testing of the clamping force of the lower fork arm of a shock absorber without disassembling it, improving operational efficiency and the accuracy of test results.
Smart Images
Figure CN223925892U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to test frock technical field, concretely relates to a test frock of test damper lower fork arm embrace tight force. BACKGROUND
[0002] In the assembly of the vehicle, the swing arm of the vehicle chassis suspension is usually connected with the damper through the lower fork arm, so that the damper can play a damping effect on the chassis when the vehicle bounces during driving.
[0003] At present, the lower fork arm structure is usually used in the vehicle of four-wheel drive type, and in the four-wheel drive type, the lower end of the damper assembly passes through the transmission shaft, and the transmission shaft interferes with the lower fork arm structure, so the lower fork arm structure of the four-wheel drive type needs to avoid the transmission shaft. When designing the lower fork arm structure, two thick connecting arms are usually needed to be set to ensure the connection strength, and the space between the two thick connecting arms is large to enable the transmission shaft to pass through the space between the two arms.
[0004] Now the damper with the lower fork arm structure gradually increases, and the damper usually needs to do the embrace tight force test of the lower fork arm on the oil cylinder to meet the requirements of the customer on the embrace tight force, but the existing lower fork arm structures are different in shape, and the connecting parts under many types of lower fork arms are not on the axis of the damper, so they cannot be connected to the tension testing machine for direct embrace tight force test. Since most of the test frocks are designed according to the diameters of different oil cylinder bodies at present, the diameters are often smaller than the outer diameters of the mounting parts of the lower fork arm and the cylinder body, so in the test process, the current test method in the laboratory is: usually the lower fork arm needs to be disassembled first, the frock is sleeved outside the cylinder body, then the lower fork arm is assembled, and then the tension testing machine is started for tension test. This operation is more troublesome. In addition, repeated installation of the lower fork arm reduces the test efficiency, and also may affect the accuracy of the test results due to repeated disassembly and assembly. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model provides a test frock for testing the embrace tight force of the lower fork arm of the damper, which can realize convenient, stable, accurate and efficient test operation of the embrace tight force of the lower fork arm of the damper without disassembling the lower fork arm of the lower part of the damper.
[0006] In order to solve the above technical problems, the utility model provides a kind of test test fixture of the holding force of shock absorber lower fork arm, shock absorber and lower fork arm are set between locking nail locking operation, test fixture is used to detect the holding force of the shock absorber and lower fork arm of to be tested, the piston rod of shock absorber is connected with the upper end of tensile testing machine, including gripping portion, operator holds gripping portion can realize the lifting installation operation of test fixture, one end of gripping portion is provided with clamping assembly, clamping assembly can be clamped to the oil storage cylinder of shock absorber to be detected, the other end of gripping portion is provided with the connecting portion connected with the lower end of tensile testing machine, the relative movement of the upper end and lower end of tensile testing machine is started to realize the holding force test operation of shock absorber lower fork arm and shock absorber oil storage cylinder, clamping assembly includes the fixed sleeve of being provided at one end of gripping portion and the locking sleeve of being detachably connected with fixed sleeve, the oil storage cylinder of shock absorber is placed between locking sleeve and fixed sleeve, the utility model can be matched with the oil storage cylinder of various specifications of shock absorber by clamping assembly and realizes adaptive matching adjustment clamping operation, without repeatedly disassembling and installing lower fork arm, the holding force test operation of shock absorber lower fork arm can be realized, operation is more convenient and efficient, and the accuracy of detectable result is greatly improved.
[0007] Gripping portion is arc structure, and fixed sleeve is arranged on the upper portion of arc structure.
[0008] The outer side of fixed sleeve is provided with fixed lug, and the fixed lug is two, and symmetrically arranged on the outer side wall of fixed sleeve, and the fixed hole is formed on each fixed lug, and the outer side of locking sleeve is provided with locking lug matched with fixed lug, and correspondingly, the locking lug is two, and symmetrically arranged on the outer side wall of locking sleeve, and the locking hole matched with fixed hole is formed on each locking lug.
[0009] After the axis of fixed hole and mounting hole coincides, locking bolt and locking nut are inserted to detachably connect the two.
[0010] The connecting portion is U-shaped structure, and the pin hole is formed on the two vertical portions of connecting portion, and the lower end of tensile testing machine is provided with mounting hole, and the mounting hole is located between the two vertical portions of connecting portion, and the mounting hole and pin hole are coaxial after insertion connecting pin shaft to fix the two together.
[0011] The bending direction of the arc structure of gripping portion is opposite to the bending direction of the lower clamp arm of shock absorber.
[0012] Gripping portion, fixed sleeve and connecting portion are integrally cast into shape.
[0013] Compared with the prior art, the present application has at least one of the following beneficial technical effects:
[0014] 1. The utility model can realize the clamping and fixing operation of the oil storage cylinder of the shock absorber of various specifications and diameters through the clamping assembly arranged on the upper part of the holding part, is better in applicability, and can realize the fixing of the oil storage cylinder of the shock absorber on the pull-out testing machine to carry out the holding force test operation without separating the oil storage cylinder from the lower fork arm, and the operation is more efficient and convenient.
[0015] 2. The utility model can realize the clamping and fixing operation of the cylinder body of the oil storage cylinder between the fixed sleeve and the locking sleeve through the action of the locking bolt and the locking nut, if necessary, the anti-skid sleeve with teeth can be arranged in the inside of the fixed sleeve and the locking sleeve, which can enhance the clamping force of the cylinder body of the oil storage cylinder between the fixed sleeve and the locking sleeve.
[0016] 3. The utility model can be easily held by the operator through the arc-shaped holding part, and the arm does not need to be deeply inserted into the pull-out testing machine to realize the holding of the tool, and the tool can be conveniently and quickly installed and disassembled, and the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a structural schematic view of the test tool of the utility model for testing the holding force of the lower fork arm of the shock absorber.
[0018] The figure mark explanation: 100, holding part;200, clamping assembly;210, fixed sleeve;211, fixed lug;212, fixed hole;220, locking sleeve;221, locking lug;222, locking hole;230, locking bolt;240, locking nut;300, connecting part;301, pin hole. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the following will combine the drawings of the embodiments of the utility model to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear. Figure 1 The technical scheme of the embodiments of the utility model is clearly and completely described. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by the person skilled in the art belong to the scope of protection of the utility model.
[0020] As Figure 1As shown: This embodiment provides a test fixture for testing the clamping force of the lower fork arm of a shock absorber. After the shock absorber and the lower fork arm are fitted together, they are locked together by locking pins. The test fixture is used to detect the clamping force between the shock absorber and the lower fork arm. The piston rod of the shock absorber is connected to the upper end of a tensile testing machine. The tensile testing machine is named: Electronic Universal Testing Machine, Model: UTM5350; it includes a gripping part 100, which has an arc-shaped structure. A fixing sleeve 210 is set on the upper part of the arc-shaped structure. This utility model can use the arc-shaped gripping part 100 to both facilitate the avoidance operation of the lower fork arm of the shock absorber and facilitate the operator. The gripping operation is more convenient and efficient. The operator can lift and install the test fixture by gripping the gripping part 100. One end of the gripping part 100 is provided with a clamping component 200, which can clamp the oil reservoir of the shock absorber to be tested. The other end of the gripping part 100 is provided with a connecting part 300 that connects to the lower end of the tensile testing machine. By starting the upper and lower ends of the tensile testing machine to generate relative movement, the clamping force between the lower fork arm of the shock absorber and the oil reservoir of the shock absorber can be tested. The clamping component 200 includes a fixing sleeve 210 provided at one end of the gripping part 100 and a locking sleeve 220 that is detachably connected to the fixing sleeve 210. Figure 1 As shown, the fixing sleeve 210 and the locking sleeve 220 are only semi-circular structures, and they can form a circle when they are joined together. The inner diameter of the ring formed by the two parts is slightly larger than the outer diameter of the largest oil reservoir cylinder of the shock absorber with lower fork arm. The oil reservoir cylinder of the shock absorber is placed between the locking sleeve 220 and the fixing sleeve 210, and if necessary, two semi-circular anti-slip sleeves are installed inside it. The gripping part 100, the fixing sleeve 210 and the connecting part 300 are integrally formed by spheroidal cast iron or cast steel, and after machining, they are formed as shown. Figure 1 The structure shown has a light-removal groove on its surface, which reduces the weight of the grip 100, making it easier for the operator to lift it quickly and easily. It also ensures good rigidity and strength, which helps to extend its service life. This utility model can use the clamping component 200 to adapt and adjust the clamping operation of the oil reservoir cylinder of various specifications of shock absorbers. It can perform the clamping force test of the lower fork arm of the shock absorber without repeatedly disassembling and installing the lower fork arm. The operation is more convenient and efficient, and the accuracy of the test results is greatly improved.
[0021] The outer side of the fixing sleeve 210 is provided with a fixing ear 211, such as Figure 1As shown, the fixing lug 211 has two and is symmetrically arranged on the outer side wall of the fixing sleeve 210, and a fixing hole 212 is arranged on each fixing lug 211, and the outer side of the locking sleeve 220 is provided with a locking lug 221 matched with the fixing lug 211, and correspondingly, the locking lug 221 also has two and is symmetrically arranged on the outer side wall of the locking sleeve 220, and a locking hole 222 matched with the fixing hole 212 is arranged on each locking lug 221.
[0022] Of course, in order to ensure the firmness and tightness of the connection, the number of fixing lugs 211 can also be three, four or other numbers, and are uniformly distributed on the outer side wall of the fixing sleeve 210, and the number of locking lugs 221 is the same as that of the fixing lugs 211, and are uniformly distributed on the outer side wall of the locking sleeve 220.
[0023] After the axes of the fixing hole 212 and the mounting hole coincide, the locking bolt 230 and the locking nut 240 are inserted to detachably connect the two together, and the utility model can realize only the fixing operation of the oil storage cylinder placed in the fixing sleeve 210 and the locking sleeve 220 by tightening the bolt and the nut after the oil storage cylinder to be tested is placed between the fixing sleeve 210 and the locking sleeve 220.
[0024] The connecting part 300 is a U-shaped structure, pin holes 301 are arranged on the two vertical parts of the connecting part 300, a mounting hole is arranged at the lower end of the tensile testing machine, the mounting hole is located between the two vertical parts of the connecting part 300, and the mounting hole and the pin hole 301 are coaxial after being inserted into the connecting pin shaft to fix the two together, the utility model can realize the firm connection of the connecting part 300 and the lower part of the tensile testing machine by inserting the connecting pin shaft into the pin hole 301 and the mounting hole after the axes of the pin hole 301 on the connecting part 300 and the axis of the mounting hole are aligned, and then the tensile testing machine can be started to perform the pull-out test.
[0025] The bending direction of the arc-shaped structure of the holding part 100 is opposite to the bending direction of the lower clamping arm of the shock absorber, and the purpose is to facilitate the holding operation in the firm clamping and fixing process of the holding part 100, the oil storage cylinder of the shock absorber and the upper part of the lower clamping arm of the shock absorber, without the need for the operator to put his hand into the inside of the tensile testing machine, and the operation is safer and more convenient.
[0026] The use method of the utility model:
[0027] First, it needs to be clear that the test tool involved in the utility model is mainly used for testing the holding force between the lower fork arm and the oil storage cylinder of various specifications of shock absorber, the outer diameter of the oil storage cylinder is mostly circular, of course, when it is of other shapes, the fixed sleeve 210 and the locking sleeve 220 in the clamping assembly 200 are also of shapes suitable for it, the tensile testing machine is a device that can produce opposite pulling action in the prior art, the upper part of the tensile testing machine and the piston rod of the shock absorber are detachably fixed together through a connecting head, the implementation mode is that the center of the connecting head has a pin hole, the side has a threaded hole, the pin hole of the connecting head is connected with the pin hole of the upper part of the tensile testing machine through a pin shaft, and the threaded hole of the connecting head is matched with the external thread of the piston rod of the shock absorber, the utility model takes the test of the holding force of the lower fork arm of the shock absorber as an example to elaborate the use method of the installation of the test tool of the shock absorber, when the holding force of the lower fork arm of the shock absorber needs to be tested, the operator first loosens the bolt and the nut to separate, then the operator puts the fixed sleeve 210 into the outside of the cylinder body of the oil storage cylinder on the upper part of the lower fork arm, then the locking sleeve 220 is buckled with the fixed sleeve 210, then the locking bolt 230 is inserted into the fixed hole 212 on the fixed sleeve 210 and the locking hole 222 on the locking sleeve 220, then the end of the locking bolt 230 is tightened with the locking nut 240, then the axis of the pin hole 301 on the connecting part 300 is aligned with the axis of the mounting hole, then the connecting pin shaft is inserted into the pin hole 301 and the mounting hole to realize the firm connection of the connecting part 300 and the lower part of the tensile testing machine, then the tensile testing machine can be started to carry out the pulling test, in this process, the operator does not need to frequently disassemble the lower fork arm and the oil storage cylinder, and the holding force of the lower fork arm of the shock absorber can be tested, the utility model can realize adaptive matching adjustment and clamping operation of the oil storage cylinder of various specifications of shock absorber through the clamping assembly 200, without repeatedly disassembling and installing the lower fork arm, the holding force of the lower fork arm of the shock absorber can be tested, the operation is more convenient and efficient, the accuracy of the detectable result is greatly improved, the operation is safer, more convenient and efficient, and the applicability is stronger.
[0028] In addition, it also needs to be explained that in the description of the utility model, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.
[0029] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the ordinary in the art, without departing from the principles described in the present application, can be made several improvements and refinements, these improvements and refinements should also be considered as the scope of protection of the present application.
Claims
1. A testing fixture for testing the clamping force of the lower fork arm of a vibration damper, the fixture being used to detect the clamping force between the vibration damper to be tested and the lower fork arm, wherein the piston rod of the vibration damper is connected to the upper end of a tensile testing machine, characterized in that: The utility model provides a kind of test device for shock absorber, including holding part (100), one end of the holding part (100) is provided with clamping assembly (200), clamping assembly (200) can be clamped to the oil storage cylinder of the shock absorber to be detected, the other end of holding part (100) is provided with the connecting portion (300) being connected with the lower end of tensile testing machine, the clamping assembly (200) includes the fixed sleeve (210) being arranged in the one end of holding part (100) and the locking sleeve (220) being detachably connected with fixed sleeve (210), the oil storage cylinder of shock absorber is placed between the locking sleeve (220) and fixed sleeve (210).
2. The test fixture of claim 1, wherein: The holding part (100) is arc-shaped structure, and the fixed sleeve (210) is arranged at the upper part of the arc-shaped structure.
3. The test fixture for testing the clamping force of the lower fork arm of a shock absorber as described in claim 2, characterized in that: The outer side of the fixed sleeve (210) is provided with a fixed lug (211), and the fixed lug (211) is provided with a fixed hole (212).
4. The test fixture for testing the clamping force of the lower fork arm of a shock absorber as described in claim 3, characterized in that: The outer side of the locking sleeve (220) is provided with a locking lug (221) matched with the fixed lug (211), and the locking lug (221) is provided with a locking hole (222) matched with the fixed hole (212).
5. The test fixture for testing the clamping force of the lower fork arm of a shock absorber as described in claim 4, characterized in that: After the axes of the fixed hole (212) and the mounting hole coincide, the locking bolt (230) and the locking nut (240) are inserted to detachably connect them together.
6. The test fixture of claim 2, wherein: the lower fork arm of the shock absorber is a lower fork arm of a front suspension of the vehicle; and the upper fork arm of the shock absorber is an upper fork arm of the front suspension of the vehicle. The connecting portion (300) is U-shaped structure, and the two vertical parts of the connecting portion (300) are provided with pin holes (301), and the lower end of the tensile testing machine is provided with a mounting hole between the two vertical parts of the connecting portion (300), and the mounting hole is coaxial with the pin hole (301) after being inserted into the connecting pin shaft to fix them together.
7. The test fixture of claim 2, wherein: the lower fork arm of the shock absorber is a lower fork arm of a front suspension of the vehicle; and the upper fork arm of the shock absorber is an upper fork arm of the front suspension of the vehicle. The bending direction of the arc-shaped structure of the holding part (100) is opposite to the bending direction of the lower clamping arm of the shock absorber. The holding part (100), the fixed sleeve (210) and the connecting portion (300) are integrally cast into shape.