Air spring damper assembly test tool

Abstract

The utility model provides a testing tool for an air spring damper assembly. The testing tool comprises a testing platform, a clamping unit and a balance driving unit, wherein the clamping unit and the balance driving unit are arranged on the testing platform; the clamping unit comprises a group of guide rails arranged in parallel, a sliding block installed on the guide rails, a first support and a second support, the first support is connected to the first side of the sliding block, and the first support and the second support are used for clamping the two ends of an air spring damper assembly to be tested; the balance driving unit comprises an elastic piece and a moving unit, one end of the elastic piece is connected with the second side of the sliding block, and the moving unit is connected with the other end of the elastic piece and can drive the other end of the elastic piece to move. According to the utility model, the state of the elastic piece can be controlled through the moving unit, namely, the bearing capacity of one end of the air spring shock absorber assembly can be controlled, so that the air tightness test of the air bag of the air spring at different environment temperatures under the constant bearing capacity can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of testing or detecting equipment, in particular to an air spring damper assembly testing tool. Background Art

[0002] Air springs are springs made by utilizing the elastic force generated by compressed air. Air springs have ideal nonlinear elastic properties and are currently mainly used in the vibration reduction systems of various vehicles, such as air spring shock absorber assemblies. With the development of the automotive industry, test fixtures are widely used in the assembly test of automotive chassis vibration reduction support products, and the performance of air spring shock absorber assemblies is tested using instrument tensile testing machines. However, the existing air spring shock absorber assembly clamping fixtures can only adjust the installation height of the air spring, or lock it at a fixed height, and cannot meet the needs of air tightness testing of airbags under constant load-bearing conditions, including air tightness testing under constant force or in different temperature environments.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] In view of the problems in the prior art, the purpose of the utility model is to provide an air spring damper assembly testing tool to achieve air tightness testing of the air spring airbag of the air spring damper assembly to be tested at different ambient temperatures under a constant or nearly constant load.

[0005] The embodiment of the utility model provides an air spring damper assembly test fixture, comprising a test platform and a clamping unit and a balancing drive unit arranged on the test platform;

[0006] The clamping unit includes a guide rail unit, a sliding block installed on the guide rail unit, a first bracket and a second bracket, the first bracket is connected to a first side of the sliding block, and the first bracket and the second bracket are used to clamp two ends of the air spring damper assembly to be tested;

[0007] The balance driving unit includes an elastic member and a moving unit. One end of the elastic member is connected to the second side of the sliding block. The moving unit is connected to the other end of the elastic member and can drive the other end of the elastic member to move.

[0008] According to some examples of the present utility model, the first bracket includes a first bracket body and a first pin rod disposed on the first bracket body;

[0009] The second bracket includes a second bracket body and a second pin rod arranged on the second bracket body;

[0010] The first pin and the second pin are respectively used to penetrate the first connecting bushing and the second connecting bushing of the air spring damper assembly.

[0011] According to some examples of the present utility model, the moving unit includes a cover plate, a threaded slider, a screw support and a screw which are sequentially arranged at the other end of the elastic member;

[0012] The screw comprises a threaded section, a stopper and a support section connected in sequence;

[0013] The threaded section passes through the threaded slider, the cover plate and the elastic member in sequence, and one end thereof facing away from the supporting section abuts against the second side of the sliding block, and the supporting section passes through the screw support.

[0014] According to some examples of the present invention, the threaded slider further includes a plurality of handles arranged on the circumference of the threaded slider.

[0015] According to some examples of the present utility model, the test platform further includes a guide groove;

[0016] The moving unit further comprises a sleeve, one end of which is detachably disposed in the guide groove and movable along the guide groove, and the other end of the sleeve is engageable with the handle.

[0017] According to some examples of the present utility model, the moving unit further includes a first thrust bearing and a second thrust bearing, and the first thrust bearing and the second thrust bearing are respectively arranged on both sides of the threaded slider.

[0018] According to some examples of the present utility model, the moving unit further includes a hollow limiting rod, which is disposed in the elastic member at one end of the sliding block and sleeved on one end of the threaded section away from the supporting section.

[0019] According to some examples of the present utility model, the limiting rod is provided with a threaded hole matched with one end of the threaded segment.

[0020] According to some examples of the present utility model, the moving unit further includes a rocker arm, the rocker arm is connected to an end of the support segment away from the threaded segment, and the rotation of the rocker arm drives the rotation of the screw rod.

[0021] The utility model can control the state of the elastic member through the mobile unit, that is, can control the bearing capacity of one end of the air spring damper assembly, thereby realizing the air tightness test of the airbag of the air spring at different ambient temperatures under a constant or nearly constant bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0023] Figure 1 It is a structural schematic diagram of an air spring damper assembly test tooling according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a balance drive unit of a test fixture according to an embodiment of the utility model;

[0025] Figure 3 This is a schematic structural diagram of a threaded slider according to an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of the structure of a test fixture of an embodiment of the utility model when clamping an air spring damper assembly; and

[0027] Figure 5 The figure is a schematic structural diagram of an air spring damper assembly test fixture during testing according to an embodiment of the utility model. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the utility model will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and should not be construed as limitations on the utility model. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0029] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0032] In view of the existing technical problems, the utility model provides an air spring damper assembly test fixture, the test fixture includes a test platform and a clamping unit and a balancing drive unit arranged on the test platform; the clamping unit includes a guide rail unit, a sliding block installed on the guide rail unit, a first bracket and a second bracket, the first bracket is connected to the first side of the sliding block, the first bracket and the second bracket are used to clamp the two ends of the air spring damper assembly to be tested; the balancing drive unit includes an elastic member and a moving unit, one end of the elastic member is connected to the second side of the sliding block, and the moving unit is connected to the other end of the elastic member and can drive the other end of the elastic member to move. The utility model can control the state of the elastic member through the moving unit, that is, it can control the bearing capacity of one end of the air spring damper assembly, so as to realize the air tightness test of the airbag of the air spring at different ambient temperatures under a constant or nearly constant bearing capacity.

[0033] The structure of the air spring damper assembly test fixture of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It can be understood that the various specific embodiments are not intended to limit the protection scope of the present invention.

[0034] Figure 1This is a structural schematic diagram of an air spring damper assembly test fixture of an embodiment of the utility model. Specifically, the test fixture includes a test platform 1 and a clamping unit and a balancing drive unit 6 arranged on the test platform 1; the test platform 1 can be a horizontally arranged platform, and the clamping unit includes a guide rail unit, a sliding block 3 installed on the guide rail unit, a first bracket and a second bracket.

[0035] In this embodiment, the guide rail unit includes a group of guide rails 21 arranged in parallel. More specifically, each guide rail 21 is arranged on the test platform 1 through two support seats 22. The two ends of the sliding block 3 are respectively passed through a guide rail 21, and the sliding block 3 can move back and forth along the extension direction of the two parallel guide rails 21. In some other embodiments, the guide rail unit can be a pair of slide rails arranged in parallel on the test platform. In this case, the sliding block is provided with grooves that slide with the two slide rails.

[0036] The first bracket is connected to the first side of the sliding block, and the first bracket and the second bracket are used to clamp the two ends of the air spring damper assembly to be tested; generally, the two ends of the air spring damper assembly are arranged in the form of bushings. In this embodiment, the first bracket includes a first bracket body 41 and a first pin 42 arranged on the first bracket body 41; the first bracket body 41 is in the shape of a tree branch, and the two ends of the first pin 42 are detachably inserted into the first bracket body 41. At this time, the first bracket body 41 of the first bracket is connected to the first side of the sliding block 3 between the two guide rails 21 and is arranged between the two guide rails 21. The first pin 42 is used to penetrate the first connecting bushing at one end of the air spring damper assembly. Similarly, the second bracket includes a second bracket body 51 and a second pin 52 arranged on the second bracket body 51; the second bracket body 51 is in the shape of a tree branch, and the two ends of the second pin 52 are detachably inserted into the second bracket body 51. The second pin 52 is used to penetrate the second connecting bushing at the other end of the air spring damper assembly. The structures of the first bracket and the second bracket may also adopt other structures, as long as they can be connected to both ends of the air spring damper assembly to be tested.

[0037] Figure 2 This is a structural schematic diagram of a balance drive unit of a test fixture according to an embodiment of the utility model, wherein the balance drive unit 6 includes an elastic member 61 and a moving unit, one end of the elastic member 61 is connected to the second side of the sliding block 3, and the moving unit is connected to the other end of the elastic member 61 and can drive the other end of the elastic member 61 to move. Figure 1In the embodiment of the present invention, the elastic member 61 can be a high-strength compression spring, and the moving unit includes a cover plate 62, a threaded slider 63, a screw support 64 and a screw rod which are sequentially arranged at the other end of the elastic member 61; the screw rod includes a threaded segment 651, a stopper 652 and a support segment 653 which are sequentially connected; the threaded segment 651 sequentially passes through the threaded slider 63, the cover plate 62 and the elastic member 61, and one end of the threaded segment 651 away from the support segment 653 abuts against the second side of the sliding block 3, and the support segment 653 passes through the screw support 64. It should be noted that the direction in which the elastic member 61 is extended and retracted is the direction in which the sliding block 3 moves.

[0038] Figure 3 The structural schematic diagram of a threaded slider of an embodiment of the utility model, the threaded slider 63 may include a threaded slider body 631 and a threaded hole 632 provided on the threaded slider body 631, the thread of the threaded hole 632 is meshed with the thread of the threaded segment 651, and the position of the cover plate 62 can be adjusted by rotating the threaded slider 63, so that the length of the elastic member 61 can be adjusted to change the load force on the second side of the sliding block 3. The length of the elastic member 61 can be obtained by measuring the distance between the second side of the sliding block 3 and the abutment between the cover plate 62 and the elastic member 61. In order to facilitate the rotation of the threaded slider, in this embodiment, the threaded slider 63 also includes a plurality of handles 633 provided on the circumference of the threaded slider body 631. Furthermore, the test platform 1 also includes a guide groove 11; the movable unit also includes a sleeve 66, one end of which is detachably arranged in the guide groove 11 and can be moved along the guide groove 11, and the other end of the sleeve 66 can be fitted with the handle 633. When the threaded slider 63 is adjusted to the length set by the elastic member 61 by rotating the threaded slider 63, the sleeve 66 can be sleeved on the handle 633 to prevent the threaded slider 63 from rotating and prevent the length of the elastic member 61 from changing.

[0039] In some embodiments, the mobile unit may further include a first thrust bearing 681 and a second thrust bearing 682, wherein the first thrust bearing 681 and the second thrust bearing 682 are respectively arranged on both sides of the threaded slider 63, and the first thrust bearing 681 and the second thrust bearing bear the axial load and thrust load on the screw to ensure the normal rotation of the threaded slider 63, while helping to reduce friction and pressure and extend the durability of the mobile unit.

[0040] Figure 4The schematic diagram of the structure of the test fixture of one embodiment of the utility model when clamping the air spring damper assembly, the mobile unit of the test fixture of this embodiment also includes a hollow limit rod 69, the limit rod 69 is arranged in the elastic member 61 at one end of the sliding block 3 and is sleeved on one end of the threaded section 651 away from the support section 653. The limit rod 69 can prevent the elastic member 61 from tilting during the compression process. In this embodiment, one end of the threaded section 651 can directly pass through the hollow limit rod 69 and abut against the second side of the sliding block 3. In some other embodiments, the limit rod can be provided with a threaded hole that cooperates with one end of the threaded section, that is, a threaded hole is provided in the hollow structure, and one end of the threaded section 651 abuts against the second side of the sliding block 3 through the limit rod 69. At this time, the rotating screw can adjust the distance of the limit member 652 relative to the sliding block 3, that is, it can also play the role of adjusting the length of the elastic member 61. Furthermore, in order to prevent the screw from rotating, the moving unit further includes a rocker arm 67, which is connected to an end of the support section 633 away from the threaded section 651, and the rotation of the rocker arm 67 drives the rotation of the screw. The air spring damper assembly can be a height valve built-in air spring damper assembly (CALM), such as Figure 4 As shown, the height valve built-in air spring shock absorber assembly includes a bag-type air spring and a shock absorber, etc., and the air spring is provided with a height valve. During the test, the first bracket and the second bracket clamp the height valve built-in air spring shock absorber assembly, which can be achieved by connecting the first pin 42 and the second pin 52 through the first connecting bushing 91 and the second connecting bushing 92 respectively.

[0041] Figure 5 The following is a schematic diagram of the structure of the air spring damper assembly test tool during testing of an embodiment of the utility model. The structure of the test tool is further described below through a test method. Specifically, the test method using the test tool of the utility model includes the following steps:

[0042] S10: Connecting the first connecting bushing 91 and the second connecting bushing 92 of the air spring damper assembly 9 to be tested to the first pin rod 42 and the second pin rod 52 respectively;

[0043] S20: Inflate the air spring damper assembly 9 so that the air pressure of its air bag reaches a specified air pressure P0;

[0044] S30: Adjust the position of the sliding block 3 to adjust the length of the elastic member 61, so that the force of the air spring damper assembly 9 on both sides of the sliding block 3 is the same as the force of the elastic member 61, and the sliding block 3 is in a balanced state. At this time, the length of the elastic member 61 is X0, and the position of the sliding block 3 is S0;

[0045] S40: disconnect the air supply of the air spring damper assembly 9, put the whole test fixture into the ambient temperature box, set the temperature to T1, and let it stand for a set time, such as n1 hours. At this time, due to the temperature change, the air pressure of the airbag of the air spring damper assembly 9 changes, and the height of the air spring damper assembly 9 changes. When the ambient temperature box reaches the set temperature T1 for a certain period of time, the sliding block 3 is in another equilibrium position, and the position S1 of the sliding block 3 is recorded; the position change ΔS of the sliding block 3 is obtained through S0 and S1; if ΔS is less than a set threshold, it can be considered that the air tightness of the air spring is qualified at the temperature T1, and the set threshold can be an empirical value.

[0046] Of course, after step S30, the air spring damper may be left to stand for a set time without being placed in an ambient temperature box. In this case, the air tightness of the air spring damper at room temperature is measured.

[0047] The above steps are repeated at different ambient temperatures to achieve air tightness testing of the airbag of the air spring at different ambient temperatures under a constant or nearly constant load.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0049] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An air spring damper assembly test fixture, characterized in that: It comprises a test platform, and a clamping unit and a balancing drive unit arranged on the test platform; The clamping unit includes a guide rail unit, a sliding block installed on the guide rail unit, a first bracket and a second bracket, the first bracket is connected to a first side of the sliding block, and the first bracket and the second bracket are used to clamp two ends of the air spring damper assembly to be tested; The balance driving unit includes an elastic member and a moving unit. One end of the elastic member is connected to the second side of the sliding block. The moving unit is connected to the other end of the elastic member and can drive the other end of the elastic member to move.

2. The air spring damper assembly test fixture according to claim 1, characterized in that: The first bracket includes a first bracket body and a first pin rod arranged on the first bracket body; The second bracket includes a second bracket body and a second pin rod arranged on the second bracket body; The first pin and the second pin are respectively used to penetrate the first connecting bushing and the second connecting bushing of the air spring damper assembly.

3. The air spring damper assembly test fixture according to claim 1, characterized in that: The moving unit comprises a cover plate, a threaded slider, a screw support and a screw which are sequentially arranged at the other end of the elastic member; The screw comprises a threaded section, a stopper and a support section connected in sequence; The threaded section passes through the threaded slider, the cover plate and the elastic member in sequence, and one end thereof facing away from the supporting section abuts against the second side of the sliding block, and the supporting section passes through the screw support.

4. The air spring damper assembly test fixture according to claim 3, characterized in that: The threaded slider also includes a plurality of handles arranged on the circumference of the threaded slider.

5. The air spring damper assembly test fixture according to claim 4, characterized in that: The test platform also includes a guide groove; The moving unit further comprises a sleeve, one end of which is detachably disposed in the guide groove and movable along the guide groove, and the other end of the sleeve is engageable with the handle.

6. The air spring damper assembly test fixture according to claim 3, characterized in that: The moving unit further includes a first thrust bearing and a second thrust bearing, wherein the first thrust bearing and the second thrust bearing are respectively arranged on both sides of the threaded slider.

7. The air spring damper assembly test fixture according to claim 3, characterized in that: The moving unit further comprises a hollow limiting rod, which is arranged in the elastic member at one end of the sliding block and sleeved on one end of the threaded section away from the supporting section.

8. The air spring damper assembly test fixture according to claim 7, characterized in that: The limiting rod is provided with a threaded hole matched with one end of the threaded section.

9. The air spring damper assembly test fixture according to claim 8, characterized in that: The moving unit further comprises a rocker arm, which is connected to an end of the supporting section away from the threaded section, and the rotation of the rocker arm drives the rotation of the screw rod.

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