Air spring sealing film durability test tool

Abstract

The utility model discloses a kind of air spring sealing membrane endurance test tool, including fixing part, movable part, movable part, fixing part are respectively equipped with the fixed part that can fix sealing membrane inner edge and outer edge, movable part one end extends to the inside of fixing part and with fixing part sliding cooperation, the other end is connected with driving part, driving part can drive movable part reciprocating movement relative to fixing part.The utility model in, by movable part, fixing part respectively fixed sealing membrane inner edge and outer edge, driving part can drive movable part reciprocating movement relative to fixing part, to be able to realize the endurance verification of sealing membrane.

Description

Technical Field

[0001] This utility model relates to the technical field of air spring seal durability testing equipment, and more specifically to an air spring sealing membrane durability testing fixture. Background Technology

[0002] As some air spring manufacturers begin to adopt sealing structures with sealing membranes, such as the patent document with patent publication number CN112727993A which discloses a sealing membrane in an air spring shock absorber with a sealing membrane, the sealing membrane, as one of the key flexible components of this type of air spring, will move up and down with the up and down movement of the air spring and play a sealing role. Before it is officially assembled into the finished air spring, it is necessary to simulate the movement process of the air spring assembly to verify the durability and burst performance of the sealing membrane to ensure the stability of its performance. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to provide a durability testing fixture suitable for sealing films.

[0004] This utility model solves the above-mentioned technical problems through the following technical means: a durability test fixture for a spring-loaded sealing membrane, including a fixed part and a movable part. The movable part and the fixed part are respectively provided with a fixing part that can fix the inner edge and the outer edge of the sealing membrane. One end of the movable part extends into the fixed part and slides with the fixed part, and the other end is connected to a driving part. The driving part can drive the movable part to move back and forth relative to the fixed part.

[0005] As a preferred technical solution, the movable part is connected to the piston rod of the driving part through at least one ball head structure. The ball head structure includes a movable ball head and a ball head seat. The ball head is fixedly connected to the end of the piston rod facing the movable part, and the ball head seat is fixedly connected to the end of the movable part facing the piston rod.

[0006] As a preferred technical solution, one end of the movable part extending into the inner cavity of the fixed part can form a sealed cavity structure with the inner cavity of the fixed part, and an air nozzle connected to the fixed part and communicating with the cavity is attached to the outside.

[0007] As a preferred technical solution, the fixing component includes an upper pressure cover, a base, and an outer pressure ring for the sealing membrane. The upper pressure cover is located at the end of the base facing the driving component, and the outer pressure ring for the sealing membrane is located between the upper pressure cover and the base. The upper pressure cover is connected and fastened to the base by bolts, causing the outer pressure ring for the sealing membrane to abut against the upper pressure cover and the base. Both the upper pressure cover and the base have through holes adapted to the moving component, and the outer pressure ring for the sealing membrane is connected to the outer edge of the sealing membrane.

[0008] As a preferred technical solution, the base is provided with a mating step that matches the upper cover, and a graphite copper sleeve is fixedly connected inside the upper cover.

[0009] As a preferred technical solution, the moving part includes a connecting rod, a slider, a locking nut, a sealing membrane support, and a sealing membrane inner pressure ring. The connecting rod is fixed to the sealing membrane support by a positioning step arranged around its circumference. The sealing membrane inner pressure ring is sleeved on the outer side of the sealing membrane support. The connecting rod passes through the slider and is threaded to a locking nut at its end facing the driving component. The locking nut causes the sealing membrane inner pressure ring to be interference-fitted with the sealing membrane support, and the sealing membrane inner pressure ring is connected to the inner edge of the sealing membrane.

[0010] As a preferred technical solution, the telescopic end of the drive component is connected to a connector, which forms a piston rod.

[0011] As a preferred technical solution, the ball head structure has two parts, namely ball head one and ball head two. The connector is connected to the connecting rod two through ball head two, and the connecting rod two is connected to the moving part through ball head one.

[0012] As a preferred technical solution, the inner cavity of the fastener is provided with a through hole that communicates with the outside.

[0013] As a preferred technical solution, bolt holes that are compatible with bolts are provided on both the upper cover and the base.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) In this utility model, the inner edge and outer edge of the sealing film are fixed by the movable part and the fixed part respectively, and the driving part can drive the movable part to move back and forth relative to the fixed part, thereby enabling the durability verification of the sealing film.

[0016] (2) In this utility model, by setting the ball head structure, the movement direction of the moving part can be guaranteed to be nearly vertical, and the moving part will not tilt due to the tilt of the drive extension rod; by adopting the graphite copper sleeve structure, the slider and the graphite copper sleeve can be guaranteed to have good wear resistance, so as to ensure that there is no excessive gap between the slider and the copper sleeve for as long as possible.

[0017] (3) In this utility model, a sealed cavity is formed by the end of the movable part extending into the inner cavity of the fixed part and surrounding the fixed part, and an air nozzle connected to the outside of the fixed part and communicating with the cavity is connected to achieve the inflation burst test of the sealing membrane. Attached Figure Description

[0018] Figure 1 A schematic diagram of the sealing membrane structure is provided for the background art of this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the tooling provided in an embodiment of the present utility model;

[0020] Figure 3 Provided for the embodiments of this utility model Figure 2 A partially enlarged structural diagram;

[0021] Figure 4 This is a schematic diagram of the upper pressure cover structure provided in an embodiment of the present utility model;

[0022] Figure 5 A schematic diagram of the slider structure provided in an embodiment of this utility model;

[0023] Figure 6 A schematic diagram of a connecting rod structure provided in an embodiment of this utility model;

[0024] Reference numerals: 1. Base; 2. Upper pressure cap; 3. Graphite copper sleeve; 4. Slider; 5. Connecting rod one; 6. Locking nut; 7. Ball head one; 8. Connecting rod two; 9. Ball head two; 10. Connector; 11. Sealing membrane support seat; 12. Inner pressure ring of sealing membrane; 13. Outer pressure ring of sealing membrane; 14. Sealing membrane; 15. Through hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] See Figure 2 , Figure 3 A durability testing fixture for a spring-loaded sealing membrane includes a fixed component and a movable component. The movable component and the fixed component are respectively provided with fixing parts capable of fixing the inner and outer edges of the sealing membrane 14. In this embodiment, the sealing membrane 14 is generally annular. One end of the movable component extends into the fixed component and slides within it, while the other end is connected to a driving component. The driving component can drive the movable component to reciprocate relative to the fixed component, thereby achieving the stretching of the sealing membrane 14 and testing its durability. The movable component is connected to the piston rod of the driving component via at least one ball-head structure. The ball-head structure includes a movable ball head and a ball head seat. The ball head seat can cover the ball head and provide it with a certain range of movement trajectory. The ball head is fixedly connected to the end of the piston rod facing the movable component, and the ball head seat is fixedly connected to the end of the movable component facing the piston rod. The ball-head structure can prevent changes in the force transmission direction caused by the offset of the piston rod or the positional shift of the driving component, thereby avoiding the offset of the movable component caused by external driving.

[0027] The movable part and the fixed part are coaxially arranged. One end of the movable part extends into the inner cavity of the fixed part and can form a closed cavity structure with the inner cavity of the fixed part. The fixed part is connected to an air nozzle (not shown in the figure) that communicates with the cavity, which can realize the inflation and burst test of the sealing membrane.

[0028] See Figure 2 , Figure 3 , Figure 4 The fixing components include an upper pressure cover 2, a base 1, a sealing membrane outer pressure ring 13, and a graphite copper sleeve 3, all coaxially arranged. The upper pressure cover 2 is located at the end of the base 1 facing the driving component. The base 1 has a mating step adapted to the upper pressure cover 2, allowing the upper pressure cover 2 to snap into the mating step. The sealing membrane outer pressure ring 13 is disposed between the upper pressure cover 2 and the base 1. In this embodiment, the sealing membrane outer pressure ring 13 is fixed within the mating step. The upper pressure cover 2 is connected and fastened to the base 1 by bolts, clamping the sealing membrane outer pressure ring 13 between the upper pressure cover 2 and the base 1. Both the upper pressure cover 2 and the base 1 have bolt holes adapted to the bolts. In this embodiment, three bolts are used as an example. The three bolts are distributed at equal angles. Of course, other numbers of bolts can also be used, and it is not limited to this. The upper cover 2 and the base 1 are provided with through holes that are adapted to the moving parts, so as to satisfy the movement of the moving parts in the upper cover 2 and the base 1. The outer pressure ring 13 of the sealing film is fixedly connected to the outer edge of the sealing film 14. The bottom of the outer pressure ring 13 of the sealing film is provided with a mounting groove that is generally arranged in a Z-shape. The outer edge of the sealing film 14 is inserted into the mounting groove. The base 1 is provided with a through hole 15 that communicates with the outside. One end of the through hole 15 is connected to the inner cavity of the base 1, and the other end is fixedly connected to the sealing film 14.

[0029] See Figure 2 , Figure 4 , Figure 5 , Figure 6 The moving parts include a connecting rod 5, a slider 4, a locking nut 6, a sealing membrane support 11, and a sealing membrane inner pressure ring 12. The connecting rod 5 is fixed to the sealing membrane support 11 by a positioning step arranged around its circumference. The sealing membrane inner pressure ring 12 is sleeved on the outside of the sealing membrane support 11. The connecting rod 5 passes through the slider 4 and is threaded to the locking nut 6 at the end facing the drive component. Tightening the locking nut 6 can make the sealing membrane inner pressure ring 12 and the sealing membrane support 11 have an interference fit. The sealing membrane inner pressure ring 12 is connected to the inner edge of the sealing membrane 14. The bottom of the sealing membrane inner pressure ring 12 has a roughly Z-shaped mounting groove. The inner edge of the sealing membrane 14 is inserted into the mounting groove. The mounting grooves of the sealing membrane inner pressure ring 12 and the sealing membrane outer pressure ring 13 form a fixing part.

[0030] In this embodiment, the driving component is an electric telescopic rod or a hydraulic cylinder. Its telescopic end is connected to a connector 10. The connector 10 is a piston rod structure of a hydraulic cylinder or an electric telescopic rod. The driving component can also be a linear module in the prior art, or other structures that can achieve linear drive. There are two ball head structures, namely ball head one 7 and ball head two 9. The connector 10 is connected to one end of the connecting rod two 8 through ball head two 9. The other end of the connecting rod two 8 is connected to one end of the connecting rod one 5 through ball head one 7. Ball head two 9 is fixed at the end of the connector 10. One end of the connecting rod two 8 that mates with ball head two 9 is provided with a ball head seat that is adapted to ball head two 9. The other end of the connecting rod two 8 is fixedly connected to ball head one 7. The end of the connecting rod one 5 that mates with ball head one 7 is fixedly connected to a ball head seat that is adapted to ball head one 7.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An air spring seal membrane durability test tool, characterized by, It includes a fixed part and a movable part. The movable part and the fixed part are respectively provided with a fixing part that can fix the inner edge and the outer edge of the sealing film. One end of the movable part extends into the fixed part and slides with the fixed part, and the other end is connected to the driving part. The driving part can drive the movable part to move back and forth relative to the fixed part.

2. The air spring seal durability test fixture of claim 1, wherein: The movable component is connected to the piston rod of the driving component via at least one ball joint structure. The ball joint structure includes a movable ball joint and a ball joint seat. The ball joint is fixed to the end of the piston rod facing the movable component, and the ball joint seat is fixed to the end of the movable component facing the piston rod.

3. The air spring seal durability test fixture of claim 1, wherein: One end of the movable part extends into the inner cavity of the fixed part and can form a closed cavity structure with the inner cavity of the fixed part. An air nozzle connected to the fixed part and communicating with the cavity is attached to the outside.

4. The air spring sealing diaphragm durability testing fixture according to claim 1, characterized in that, The fixing component includes an upper pressure cover, a base, and an outer pressure ring for the sealing membrane. The upper pressure cover is located at the end of the base facing the driving component. The outer pressure ring for the sealing membrane is located between the upper pressure cover and the base. The upper pressure cover is connected and fastened to the base by bolts, causing the outer pressure ring for the sealing membrane to abut against the upper pressure cover and the base. Both the upper pressure cover and the base have through holes adapted to the moving component. The outer pressure ring for the sealing membrane is connected to the outer edge of the sealing membrane.

5. The air spring sealing diaphragm durability testing fixture according to claim 4, characterized in that, The base has a mating step that matches the upper cover, and a graphite copper sleeve is fixedly connected inside the upper cover.

6. The air spring sealing diaphragm durability testing fixture according to claim 1, characterized in that, The moving parts include a connecting rod, a slider, a locking nut, a sealing membrane support, and a sealing membrane inner pressure ring. The connecting rod is fixed to the sealing membrane support by a positioning step set around its circumference. The sealing membrane inner pressure ring is sleeved on the outside of the sealing membrane support. The connecting rod passes through the slider and is threaded to a locking nut at the end facing the drive component. The locking nut causes the sealing membrane inner pressure ring to be interference-fitted with the sealing membrane support, and the sealing membrane inner pressure ring is connected to the inner edge of the sealing membrane.

7. The air spring sealing diaphragm durability testing fixture according to claim 2, characterized in that, The telescopic end of the drive component is connected to a connector, which forms a piston rod.

8. The air spring sealing diaphragm durability testing fixture according to claim 7, characterized in that, The ball head structure has two parts, namely ball head one and ball head two. The connector is connected to the connecting rod two through ball head two, and the connecting rod two is connected to the moving part through ball head one.

9. The air spring sealing diaphragm durability testing fixture according to claim 1, characterized in that, The inner cavity of the fastener has a through hole that communicates with the outside.

10. The air spring sealing diaphragm durability testing fixture according to claim 4, characterized in that, Both the upper cover and the base have bolt holes that are compatible with the bolts.

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