Inflatable sealing column

Abstract

The invention discloses an inflatable sealing column, and belongs to the technical field of shock absorber detection. The problems of low efficiency and shock absorption oil leakage caused by repeated disassembly in a shock absorber foundation damping force value testing process in the prior art are solved. A sealing column connecting part is arranged on the lower end face of the sealing column body in a protruding mode, a transverse through hole is formed in the sealing column connecting part, a vertical through hole is formed in the sealing column body, the vertical through hole is communicated with the transverse through hole, a valve assembly used for inflating and deflating the sealing column body is arranged at the upper end of the sealing column body, and the valve assembly is communicated with the vertical through hole. The side wall of the lower end of the sealing column body is provided with an external thread matched with an internal thread of an electromagnetic valve seat of the shock absorber, a first annular groove is formed in the position, close to the upper portion of the external thread, of the side wall of the sealing column body, and a first sealing ring is arranged in the first annular groove. The inflatable sealing column provided by the invention is used for testing a basic damping force value of a shock absorber, the basic damping force value testing efficiency is improved, shock absorption oil leakage is reduced, and the testing accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of shock absorber detection, and more specifically, relates to an inflatable sealing column. Background Art

[0002] Currently, in the manufacturing and detection processes of CDC shock absorbers, a special tooling sealing column is required to replace the solenoid valve for functional verification of the basic damping force value. This tooling uses a threaded connection structure, with an O-ring seal at the top for oil sealing, and a hexagonal step at the end face for easy torque application. However, the existing sealing column tooling has significant technical defects when applied to the sealing parts of CDC shock absorbers: First, the air charging and discharging channels are blocked after the tooling is installed, and repeated disassembly is required for gas adjustment, resulting in a reduction in test efficiency by more than 40%; Second, the sealing interface design is unreasonable, and oil leakage is likely to occur during the air pressure adjustment process. On average, about 15 mL of hydraulic oil is lost per single test, which not only increases the material cost but also affects environmental cleanliness and test accuracy.

[0003] Through technical analysis, it is found that the root cause of this problem lies in the limitations of the original design concept. The existing sealing columns are mainly developed for the test requirements of adjustable parts of CDC shock absorbers, without considering the application of the sealing parts of CDC shock absorbers. When applied to the sealing parts, both air deflation and inflation need to be manually operated at the oil seal of the shock absorber, which not only causes oil loss but also damages the oil seal structure. Summary of the Invention

[0004] The present invention aims to provide an inflatable sealing column to improve the test efficiency of the basic damping force value of shock absorbers and reduce the leakage of shock absorber oil.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An inflatable sealing column disclosed by the present invention includes a sealing column body. A sealing column connection part protrudes from the lower end face of the sealing column body. The sealing column connection part is provided with a transverse through hole extending in the radial direction of the sealing column body. The sealing column body is provided with a vertical through hole extending along its axial direction. The vertical through hole communicates with the transverse through hole. An air valve assembly for charging and discharging air to the sealing column body is provided at the upper end of the sealing column body. The air valve assembly communicates with the vertical through hole. An external thread for mating with the internal thread of the solenoid valve seat of the shock absorber is provided on the lower side wall of the sealing column body. A first annular groove is provided at a position above the external thread of the sealing column body on the side wall of the sealing column body, and a first sealing ring is provided in the first annular groove.

[0007] Further, the vertical through hole is coaxial with the sealing column body.

[0008] Further, the upper end surface of the sealing column body is convexly provided with a valve assembly mounting portion, the valve assembly mounting portion is provided with internal threads, and the outer side wall of the valve seat of the valve assembly is provided with external threads that cooperate with the internal threads of the valve assembly mounting portion.

[0009] Further, the outer side wall of the valve seat of the valve assembly is provided with a second annular groove, and a second sealing ring is arranged in the second annular groove.

[0010] Further, a screwing portion with a hexagonal prism contour is arranged around the outside of the valve assembly mounting portion.

[0011] The beneficial effects of the present invention are as follows:

[0012] The inflatable sealing column provided by the present application is used for testing the basic damping force value of a shock absorber. The vertical through hole is opened from the upper end to the lower end of the sealing column body along the axial direction of the sealing column body, and the horizontal through hole is opened from the left end to the right end of the sealing column connecting portion at the lower end of the sealing column body along the radial direction of the sealing column body. The lower end of the vertical through hole is communicated with the horizontal through hole to form an air charging and discharging channel. The valve assembly is installed at the upper end of the sealing column body and communicated with the vertical through hole. The lower end side wall of the sealing column body is provided with external threads. When testing the basic damping force value of the shock absorber, air is released through the oil seal port of the shock absorber, the solenoid valve is loosened and removed from the solenoid valve seat, the lower end of the inflatable sealing column is placed into the solenoid valve seat, the external threads at the lower end of the sealing column body are matched with the internal threads of the solenoid valve seat, the inflatable sealing column is tightened, and the inflatable sealing column is installed and fixed on the solenoid valve seat. The valve assembly is inflated through an air inflator, and the inflated gas enters the horizontal through hole along the vertical through hole, and then enters the channel of the shock absorber from the horizontal through hole to interact with the shock absorber oil to keep the damping force stable. The test bench measures the basic damping force value. After the test is qualified, air is released through the valve assembly, and then the inflatable sealing column is loosened and removed from the solenoid valve seat. The solenoid valve seat is replaced with a solenoid valve and tightened, and air is inflated through the oil seal port. There is no need to operate the air charging and discharging through the oil seal port, and the test can be completed without damaging the sealing structure of the oil seal port. During the test process, there is no need to repeatedly disassemble for air charging and discharging adjustment, which reduces the operation time, shortens the test cycle, improves the test efficiency of the basic damping force value of the shock absorber, and avoids the leakage of shock absorber oil caused by repeated frequent disassembly. The side wall of the sealing column body is provided with a first annular groove, and a first sealing ring is installed in the first annular groove. The sealing column body is fixedly connected with the solenoid valve seat by threads, which ensures the sealing effect, greatly reduces the leakage of shock absorber oil during the test, reduces the oil loss, and improves the test accuracy. The inflatable sealing column is threadedly matched and installed with the solenoid valve seat of the shock absorber, with strong compatibility, and is particularly suitable for testing the basic damping force value of the CDC shock absorber. Description of the Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0014] Figure 1 is a cross-sectional view of an inflatable seal column provided by an embodiment of the present invention;

[0015] Figure 2 is a schematic structural diagram of an inflatable seal column provided by an embodiment of the present invention;

[0016] Figure 3 is a cross-sectional view of an inflatable seal column installed on the solenoid valve seat of a shock absorber provided by an embodiment of the present invention.

[0017] Reference numerals:

[0018] seal column body 1, vertical through hole 101, horizontal through hole 102, first annular groove 103, valve assembly 2, valve seat 201, second sealing ring 3, valve assembly installation part 4, first sealing ring 5, seal column connection part 6, screwing part 7, solenoid valve seat 8, shock absorber 9. Detailed implementation manners

[0019] To make the purpose, technical solutions and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Such as Figure 1 、 Figure 2 、 Figure 3As shown in the figure, this embodiment provides an inflatable sealing column, which includes a sealing column body 1. A sealing column connecting portion 6 is convexly provided on the lower end surface of the sealing column body 1. The sealing column connecting portion 6 is provided with a transverse through hole 102 extending in the radial direction of the sealing column body 1. The sealing column body 1 is provided with a vertical through hole 101 extending in the axial direction of the sealing column body 1. The vertical through hole 101 communicates with the transverse through hole 102. A valve assembly 2 for inflating and deflating the sealing column body 1 is provided at the upper end of the sealing column body 1. The valve assembly 2 communicates with the vertical through hole 101. An external thread that is in threaded fit with the internal thread of the solenoid valve seat 8 of the shock absorber 9 is provided on the lower side wall of the sealing column body 1. A first annular groove 103 is provided at a position above the external thread of the sealing column body 1 on the side wall of the sealing column body 1. A first sealing ring 5 that is matched with the first annular groove 103 is provided in the first annular groove 103. Among them, the sealing column connecting portion 6 and the sealing column body 1 are steel structural parts, and the sealing column connecting portion 6 and the sealing column body 1 are integrally formed structures.

[0022] An inflatable sealing column based on the above structure is used for testing the basic damping force value of a shock absorber. The vertical through hole 101 is opened from the upper end to the lower end of the sealing column body 1 along the axial direction of the sealing column body 1. The transverse through hole 102 is opened from the left end to the right end of the sealing column connecting part 6 at the lower end of the sealing column body 1 along the radial direction of the sealing column body 1. The lower end of the vertical through hole 101 is communicated with the transverse through hole 102 to form an air charging and discharging channel. The valve assembly 2 is installed at the upper end of the sealing column body 1 and communicated with the vertical through hole 101. The lower end side wall of the sealing column body 1 is provided with an external thread. When testing the basic damping force value of the shock absorber, deflate through the oil seal port of the shock absorber, loosen and remove the solenoid valve from the solenoid valve seat 8, put the lower end of the inflatable sealing column into the solenoid valve seat, and the external thread at the lower end of the sealing column body 1 is matched with the internal thread of the solenoid valve seat 8. Tighten the inflatable sealing column to install and fix the inflatable sealing column on the solenoid valve seat 8. Inflate the valve assembly 2 through an air inflater. The inflated gas enters the transverse through hole 102 along the vertical through hole 101, and then enters the channel of the shock absorber 9 from the transverse through hole 102 to interact with the shock absorber oil to keep the damping force stable. The test bench measures the basic damping force value. After the test is qualified, deflate through the valve assembly 2, then loosen and remove the inflatable sealing column from the solenoid valve seat 8, replace the solenoid valve seat 8 with a solenoid valve and tighten it, and inflate through the oil seal port. There is no need to operate the air charging and discharging through the oil seal port, and there is no need to damage the sealing structure of the oil seal solenoid valve and the solenoid valve seat 8 to complete the test. During the test process, there is no need to repeatedly disassemble for air charging and discharging adjustment, which reduces the operation time, shortens the test cycle, improves the test efficiency of the basic damping force value of the shock absorber, and avoids the leakage of the shock absorber oil caused by repeated frequent disassembly. A first annular groove is provided on the side wall of the sealing column body 1, and a first sealing ring 5 is installed in the first annular groove. The sealing column body 1 is fixedly connected with the solenoid valve seat 8 by threads to ensure the sealing effect, greatly reduce the leakage of the shock absorber oil during the test process, reduce the oil loss, and improve the test accuracy. The inflatable sealing column is threadedly matched and installed with the solenoid valve seat 8 of the shock absorber 9, and has strong compatibility, and is particularly suitable for testing the basic damping force value of the CDC shock absorber.

[0023] As an implementable manner, as Figure 1 , Figure 2 , Figure 3 shown, the vertical through hole 101 and the sealing column body 1 are coaxial.

[0024] The vertical through hole 101 is arranged along the central axis of the sealing column body 1 to ensure the stability of the sealing column and facilitate machining and drilling.

[0025] As an implementable manner, as Figure 1 , Figure 2 , Figure 3As shown, a valve component mounting portion 4 is convexly provided on the upper end surface of the sealing column body 1. The valve component mounting portion 4 is provided with an internal thread, and an external thread that mates with the internal thread of the valve component mounting portion 4 is provided on the outer side wall of the lower end of the valve seat 201 of the valve component 2.

[0026] The valve component 2 and the sealing column body 1 are threadedly connected by the cooperation of the external thread of the valve seat 201 and the internal thread of the valve component mounting portion 4. The detachable connection method is simple and reliable, convenient for installation and disassembly, and has good sealing performance. The external thread can be processed by a threading machine, and the internal thread can be processed by a threading die machine. The valve component mounting portion 4 is a steel structural member, and the valve component mounting portion 4 and the sealing column body 1 are integrally formed. The valve component 2 is like a tire valve core, and the valve seat 201 is the lower column body of the valve core.

[0027] As an implementable manner, as Figure 1 , Figure 2 , Figure 3 shown, a second annular groove is provided on the outer side wall of the lower end of the valve seat 201 of the valve component 2, and a second sealing ring 3 is arranged in the second annular groove.

[0028] The second annular groove is circumferentially arranged on the lower side wall of the valve seat 201, and the second sealing ring 3 installed and fitted in the second annular groove plays an effective sealing role to prevent gas leakage during the test from affecting the test results. The second annular groove is located above the external thread of the valve seat 201.

[0029] As an implementable manner, as Figure 1 , Figure 3 shown, a screwing portion 7 with a hexagonal prism contour is circumferentially arranged outside the valve component mounting portion 4.

[0030] The arrangement of the screwing portion 7 facilitates tightening and fixing the inflatable sealing column on the solenoid valve seat 8 of the mounting shock absorber 9 before the test, or unscrewing and disassembling the inflatable sealing column from the solenoid valve seat 8 of the shock absorber 9 after the test.

[0031] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. An inflatable sealing column, characterized in that, It includes a sealing column body (1). A sealing column connection part (6) protrudes from the lower end surface of the sealing column body (1). The sealing column connection part (6) is provided with a transverse through hole (102) extending in the radial direction of the sealing column body (1). The sealing column body (1) is provided with a vertical through hole (101) extending in its axial direction. The vertical through hole (101) communicates with the transverse through hole (102). A valve assembly (2) for charging and discharging air to and from the sealing column body (1) is provided at the upper end of the sealing column body (1). The valve assembly (2) communicates with the vertical through hole (101). An external thread for mating with the internal thread of the solenoid valve seat (8) of the shock absorber (9) is provided on the lower side wall of the sealing column body (1). A first annular groove (103) is provided at a position above the external thread of the sealing column body (1) on the side wall of the sealing column body (1). A first sealing ring (5) is provided in the first annular groove (103).

2. The inflatable sealing column according to claim 1, wherein, The vertical through hole (101) is coaxial with the sealing column body (1).

3. The inflatable sealing column according to claim 1, wherein, A valve assembly installation part (4) protrudes from the upper end surface of the sealing column body (1). The valve assembly installation part (4) is provided with an internal thread. An external thread for mating with the internal thread of the valve assembly installation part (4) is provided on the lower outer side wall of the valve seat (201) of the valve assembly (2).

4. The inflatable sealing column according to claim 3, characterized in that, A second annular groove is provided on the outer side wall of the valve seat (201) of the valve assembly (2). A second sealing ring (3) is provided in the second annular groove.

5. The inflatable sealing column according to claim 3, wherein, A screwing part (7) with a hexagonal prism contour is provided around the outside of the valve assembly installation part (4).

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