Method and tool for detecting internal pressure of shock absorber
By installing multiple pressure detectors inside the vibration damper, the problem of not being able to detect pressure at multiple key locations in real time and comprehensively in existing technologies is solved. This enables multi-position pressure monitoring of the vibration damper under actual working conditions, improving the accuracy of component matching and the overall performance of the vibration damper.
Patent Information
- Application Number
- CN202511795053.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-01-30
AI Technical Summary
Existing technologies cannot perform real-time and comprehensive detection of pressure at multiple key locations inside the shock absorber under actual working conditions, resulting in a lack of accurate data support for component matching optimization, which affects the overall performance and service life of the shock absorber.
Multiple pressure detectors are installed inside the shock absorber, including a first pressure detector, a second pressure detector, a third pressure detector, and a fourth pressure detector, located at the oil seal, near the guide on the working cylinder, in the middle of the oil reservoir, and at the bottom valve, respectively. These detectors enable real-time monitoring of the pressure on the oil seal lip, the upper and lower parts of the working cylinder, and inside the oil reservoir.
It enables real-time acquisition and synchronous monitoring of pressure data in multiple key areas of the vibration damper under tensile and compressive conditions, providing systematic and accurate pressure data support and offering more comprehensive testing support for vibration damper performance optimization.
Smart Images
Figure CN121430899A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of shock absorber detection, in particular to a method and tool for detecting internal pressure of a shock absorber. BACKGROUND
[0002] As a core damping component of vehicles and other equipment, the damping performance of a shock absorber directly affects the driving stability, comfort and durability of the equipment. With the diversification of application scenarios, the working conditions faced by shock absorbers are becoming increasingly complex, and the requirements for damping precision are also continuously improving. The damping effect of a shock absorber is closely related to the working pressure at different positions inside the shock absorber. By accurately obtaining these pressure data, the oil seal structure, valve system parameters and cylinder gap design can be optimized to achieve precise matching of damping performance.
[0003] In the prior art, there is a lack of effective solutions for real-time detection of internal pressure at multiple key positions of a shock absorber under actual installation conditions. Traditional detection methods can only obtain static pressure values at a single position and cannot fully capture the dynamic pressure changes at key positions such as the oil seal lip, upper and lower parts of the working cylinder, and the interior of the oil storage cylinder during the stretching and compression strokes. This results in a lack of precise data support for oil seal material selection, seal lip structure design, and valve system tuning, making it difficult to develop optimal component matching solutions and affecting the overall performance and service life of the shock absorber. Therefore, a method and tool for detecting internal pressure of a shock absorber are proposed. SUMMARY
[0004] (I) Technical problems solved
[0005] To address the shortcomings of the prior art, the present application provides a method and tool for detecting internal pressure of a shock absorber, which solves the problem of the prior art that cannot perform real-time and comprehensive detection of internal pressure at multiple key positions of a shock absorber under actual working conditions, resulting in a lack of precise data support for component matching optimization.
[0006] (II) Technical solutions
[0007] To achieve the above-mentioned purposes, the present application provides the following technical solutions: a method and tool for detecting internal pressure of a shock absorber, comprising a shock absorber body, wherein the shock absorber body is composed of an oil storage cylinder, a working cylinder, an intermediate cylinder, a guide, an oil seal and a bottom valve, and a pressure detector assembly is arranged on the shock absorber body.
[0008] Preferably, the intermediate cylinder is coaxially sleeved in the oil storage cylinder, the working cylinder is coaxially sleeved in the intermediate cylinder, two ends of the working cylinder are respectively in sealing connection with two ends of the intermediate cylinder, the guide is fixedly assembled at one end opening of the oil storage cylinder, an inner ring of the guide is in sealing cooperation with an outer peripheral surface of an end portion of the working cylinder, and an outer ring of the guide is fixedly connected with an inner wall of the oil storage cylinder, the oil seal is fixedly embedded at a side of the guide away from the working cylinder, an inner ring of the oil seal is used for sealing cooperation with a piston rod of the shock absorber, an outer ring of the oil seal is fixedly connected with an inner hole wall of the guide, and the bottom valve is fixedly assembled at the other end opening of the oil storage cylinder, an outer ring of the bottom valve is fixedly connected with the inner wall of the oil storage cylinder, and an inner ring of the bottom valve is in sealing cooperation with the outer peripheral surface of the end portion of the working cylinder.
[0009] Preferably, the pressure detector assembly comprises a first pressure detector, a second pressure detector, a third pressure detector and a fourth pressure detector.
[0010] Preferably, an annular gap is formed between the outer wall of the intermediate cylinder and the inner wall of the oil storage cylinder.
[0011] Preferably, the first pressure detector is located at the oil seal, the second pressure detector is located on the working cylinder close to the guide, the third pressure detector is located in the middle of the oil storage cylinder, and the fourth pressure detector is located at the bottom valve.
[0012] Preferably, the first pressure detector, the second pressure detector, the third pressure detector and the fourth pressure detector can be installed through tapping or adding a mounting seat on the shock absorber body.
[0013] Preferably, the output ends of the first pressure detector, the second pressure detector, the third pressure detector and the fourth pressure detector are electrically connected with force value displays.
[0014] A detection method for the internal pressure of a shock absorber, using the detection tool for the internal pressure of a shock absorber according to any one of claims 1 to 7, comprising the following steps:
[0015] Step one: after assembling the bottom valve, the intermediate cylinder and the working cylinder, sequentially assembling the guide and the oil seal, and then compressing and sealing through the gland;
[0016] Step two: drilling a hole at the oil seal and installing the first pressure detector to collect the pressure at the air sealing lip of the oil seal, so as to detect the opening pressure of the air sealing lip, and after drilling the hole, the first pressure detector is installed in an end face sealing manner to prevent oil leakage;
[0017] Step three: on the upper part of the oil tank: a concentric hole is opened in the oil tank, the working cylinder and the intermediate cylinder, and a second pressure detector is installed outside the oil tank to detect the working pressure of the upper part of the working cylinder of the shock absorber; similarly, a third pressure detector is installed in the middle of the shock absorber to detect the working pressure inside the oil tank; similarly, a fourth pressure detector is installed at the lower part of the shock absorber to detect the working pressure of the lower part of the working cylinder of the shock absorber; according to the detection needs, sensors can also be added where needed;
[0018] Step four: when the shock absorber is in the stretching stroke, the upper pressure of the restoring valve inside the working cylinder increases, and the lower pressure of the restoring valve decreases, the values are dynamically detected by the second pressure detector and the fourth pressure detector, the upper pressure is released by the gas sealing lip, and the pressure is monitored by the first pressure detector, and then the design parameters of the gas sealing lip can be supported by data, the throttle valve of the bottom valve is opened, the pressure change at the bottom valve of the shock absorber is monitored by the fourth pressure detector, and the pressure change of the oil tank is monitored by the third pressure detector, and similarly, when the shock absorber is in the compression stroke, the monitoring of each sensor is consistent with the above.
[0019] (Three) beneficial effects
[0020] Compared with the prior art, the present application provides a detection method and tool for the internal pressure of the shock absorber, which has the following beneficial effects:
[0021] The detection method and tool for the internal pressure of the shock absorber, by precisely arranging four pressure detectors in the core functional positions of the shock absorber oil seal, guide, middle of the oil tank, bottom valve, etc. to form a pressure detection assembly, breaks through the limitation of the prior art that can only realize single position static pressure detection, realizes real-time collection and synchronous monitoring of internal multi-key area pressure data of the shock absorber under actual working conditions such as stretching and compression, fully covers the core detection dimensions such as oil seal gas sealing lip pressure, upper and lower part of the working cylinder pressure and internal pressure of the oil tank, fills the technical gap of multi-position pressure cooperative detection of the shock absorber under dynamic working conditions in the industry, and provides more systematic and more accurate pressure data support for performance optimization of the shock absorber. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 A front view cross-sectional structure diagram of the detection method and tool for the internal pressure of the shock absorber is provided.
[0023] In the figure: 1, oil tank; 2, working cylinder; 3, intermediate cylinder; 4, guide; 5, oil seal; 6, bottom valve; 7, pressure detector assembly; 71, first pressure detector; 72, second pressure detector; 73, third pressure detector; 74, fourth pressure detector. DETAILED DESCRIPTION
[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.
[0025] Please refer to Figure 1 The shock absorber body is composed of an oil storage cylinder 1, a working cylinder 2, an intermediate cylinder 3, a guide 4, an oil seal 5 and a bottom valve 6. The intermediate cylinder 3 is coaxially sleeved in the oil storage cylinder 1, and the working cylinder 2 is coaxially sleeved in the intermediate cylinder 3. The two ends of the working cylinder 2 are respectively sealingly connected with the two ends of the intermediate cylinder 3. The guide 4 is fixedly assembled at one end opening of the oil storage cylinder 1. The inner ring of the guide 4 is sealingly matched with the outer peripheral surface of the end of the working cylinder 2, and the outer ring of the guide 4 is fixedly connected with the inner wall of the oil storage cylinder 1. The oil seal 5 is fixedly embedded on the side of the guide 4 away from the working cylinder 2. The inner ring of the oil seal 5 is used for sealingly matching with the shock absorber piston rod, and the outer ring of the oil seal 5 is fixedly connected with the inner hole wall of the guide 4. The bottom valve 6 is fixedly assembled at the other end opening of the oil storage cylinder 1. The outer ring of the bottom valve 6 is fixedly connected with the inner wall of the oil storage cylinder 1, and the inner ring of the bottom valve 6 is sealingly matched with the outer peripheral surface of the end of the working cylinder 2. The annular gap is formed between the outer wall of the intermediate cylinder 3 and the inner wall of the oil storage cylinder 1, which provides space for oil flow and facilitates installation of the pressure detector and transmission of the pressure signal, thereby ensuring the effectiveness of detection.
[0026] Further, the shock absorber body is provided with a pressure detector assembly 7, which includes a first pressure detector 71, a second pressure detector 72, a third pressure detector 73 and a fourth pressure detector 74. The multi-detector division collection mode is adopted to realize synchronous detection of the pressure at different key positions of the shock absorber and cover the core working area.
[0027] Further, the first pressure detector 71 is located at the oil seal 5, the second pressure detector 72 is located on the working cylinder 2 near the guide 4, the third pressure detector 73 is located in the middle of the oil storage cylinder 1, and the fourth pressure detector 74 is located at the bottom valve 6. The position is in sealing connection with the lower end of the working cylinder 2, which can simultaneously realize the double detection of the internal pressure of the lower part of the working cylinder 2 and the pressure at the bottom valve 6. The first pressure detector 71, the second pressure detector 72, the third pressure detector 73 and the fourth pressure detector 74 can be installed through tapping or adding a mounting seat on the shock absorber body, providing a flexible and reliable installation method, adapting to the structural characteristics of different parts of the shock absorber, while ensuring the stability and sealing performance of the installed detector. The output end of the first pressure detector 71, the second pressure detector 72, the third pressure detector 73 and the fourth pressure detector 74 is electrically connected with a force value display. In use, each pressure detector converts the collected pressure physical quantity into an electric signal, which is transmitted to the force value display through a wire harness. The display processes the electric signal into readable numerical values.
[0028] Working principle: step one: after assembling the bottom valve 6, the intermediate cylinder 3 and the working cylinder 2, the guide 4 and the oil seal 5 are sequentially installed, and then the gland is pressed to seal;
[0029] Step two: drill a hole at the oil seal 5 and install the first pressure detector 71 to collect the pressure at the sealing lip of the oil seal 5 to detect the opening pressure of the sealing lip. After drilling, the first pressure detector 71 is installed in an end face sealing manner to prevent oil leakage.
[0030] Step three: on the upper part of the oil storage cylinder 1: a concentric hole is provided in the oil storage cylinder 1, the working cylinder 2 and the intermediate cylinder 3, and the second pressure detector 72 is installed outside the oil storage cylinder 1 to detect the working pressure of the upper part of the working cylinder 2 of the shock absorber; similarly, the third pressure detector 73 is installed in the middle of the shock absorber to detect the working pressure inside the oil storage cylinder 1; similarly, the fourth pressure detector 74 is installed at the lower part of the shock absorber to detect the working pressure of the lower part of the working cylinder 2 of the shock absorber; according to the detection needs, sensors can also be added at the places that need to be detected;
[0031] Step four: when the shock absorber is in the stretching stroke, the pressure in the upper part of the restoring valve inside the working cylinder 2 increases, and the pressure in the lower part of the restoring valve decreases. The values are dynamically detected by the second pressure detector 72 and the fourth pressure detector 74. The upper pressure is released by the sealing lip, and the pressure is monitored by the first pressure detector 71. Thus, the design parameters of the sealing lip can be supported by data. The throttle valve of the bottom valve 6 is opened, and the pressure change at the bottom valve 6 of the shock absorber is monitored by the fourth pressure detector 74. The pressure change of the oil storage cylinder 1 is monitored by the third pressure detector 73. Similarly, when the shock absorber is in the compression stroke, the monitoring of each sensor is the same as above.
[0032] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. It is to be understood that the terms "including", "comprising", "consisting" and variations thereof do not preclude the addition of further integers to the combinations of integers specified in the claims. It is to be understood that the terms "including", "comprising", "consisting" and variations thereof encompass the various features of the embodiments described herein. It is not intended that the application be limited to the implementation that is described in detail and / or shown in the drawings. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims.
[0033] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to the embodiments described, and it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims.
Claims
1. A device for detecting the pressure inside a shock absorber, comprising a shock absorber body, characterized in that: The shock absorber body is composed of an oil storage cylinder (1), a working cylinder (2), an intermediate cylinder (3), a guide (4), an oil seal (5) and a bottom valve (6), and a pressure detector assembly (7) is arranged on the shock absorber body.
2. The device for detecting the pressure inside the shock absorber according to claim 1, characterized in that: The intermediate cylinder (3) is coaxially sleeved in the oil storage cylinder (1), the working cylinder (2) is coaxially sleeved in the intermediate cylinder (3), the two ends of the working cylinder (2) are sealingly connected with the two ends of the intermediate cylinder (3) respectively, the guide (4) is fixedly assembled at one end opening of the oil storage cylinder (1), the inner ring of the guide (4) is sealingly matched with the outer peripheral surface of the end of the working cylinder (2), and the outer ring of the guide (4) is fixedly connected with the inner wall of the oil storage cylinder (1), the oil seal (5) is fixedly embedded on the side of the guide (4) away from the working cylinder (2), the inner ring of the oil seal (5) is used for sealingly matching with the shock absorber piston rod, the outer ring of the oil seal (5) is fixedly connected with the inner hole wall of the guide (4), and the bottom valve (6) is fixedly assembled at the other end opening of the oil storage cylinder (1), the outer ring of the bottom valve (6) is fixedly connected with the inner wall of the oil storage cylinder (1), and the inner ring of the bottom valve (6) is sealingly matched with the outer peripheral surface of the end of the working cylinder (2).
3. The device for detecting the pressure inside the shock absorber according to claim 1, characterized in that: The pressure detector assembly (7) comprises a first pressure detector (71), a second pressure detector (72), a third pressure detector (73) and a fourth pressure detector (74).
4. The device for detecting the pressure inside the shock absorber according to claim 2, characterized in that: An annular gap is formed between the outer wall of the intermediate cylinder (3) and the inner wall of the oil storage cylinder (1).
5. The device for detecting the pressure inside the shock absorber according to claim 3, characterized in that: The first pressure detector (71) is located at the oil seal (5), the second pressure detector (72) is located on the working cylinder (2) close to the guide (4), the third pressure detector (73) is located in the middle of the oil storage cylinder (1), and the fourth pressure detector (74) is located at the bottom valve (6).
6. The device for detecting the pressure inside the shock absorber according to claim 1, characterized in that: The first pressure detector (71), the second pressure detector (72), the third pressure detector (73) and the fourth pressure detector (74) can be installed through tapping or adding a mounting seat on the shock absorber body.
7. The device for detecting the pressure inside the shock absorber according to claim 1, characterized in that: The output ends of the first pressure detector (71), the second pressure detector (72), the third pressure detector (73) and the fourth pressure detector (74) are electrically connected with force value displays.
8. A method of detecting the pressure inside a shock absorber, characterized by, The shock absorber internal pressure detection tool utilizes any one of the shock absorber internal pressure detection tools in claims 1-7, and comprises the following steps: Step one: after the bottom valve (6), the intermediate cylinder (3) and the working cylinder (2) are assembled, the guide (4) and the oil seal (5) are sequentially assembled, and then a pressing cover is used for pressing and sealing; Step two: a hole is drilled at the oil seal (5), and the first pressure detector (71) is installed to collect the pressure at the air sealing lip of the oil seal (5) to detect the opening pressure of the air sealing lip, and after drilling, the first pressure detector (71) is installed in a face sealing manner to prevent oil leakage; Step three: in the upper part of the oil tank (1): oil tank (1), working cylinder (2), intermediate cylinder (3) is provided with a concentric hole, the second pressure detector (72) is installed outside the oil tank (1) to detect the working pressure of the upper part of the working cylinder (2) of the shock absorber; Similarly, the third pressure detector (73) is installed in the middle of the shock absorber for detecting the working pressure inside the oil tank (1); Similarly, the fourth pressure detector (74) is installed in the lower part of the shock absorber for detecting the working pressure of the lower part of the working cylinder (2) of the shock absorber; According to the detection needs, sensors can also be added in the places where detection is needed; Step four: when the shock absorber is in the stretching stroke, the pressure of the upper part of the restoring valve in the working cylinder (2) increases, and the pressure of the lower part of the restoring valve decreases, the values of which are dynamically detected by the second pressure detector (72) and the fourth pressure detector (74), the upper pressure is released by the air sealing lip, and the pressure is monitored by the first pressure detector (71), so as to support the design parameters of the air sealing lip, the throttle valve of the bottom valve (6) is opened, the pressure change of the bottom valve (6) of the shock absorber is monitored by the fourth pressure detector (74), the pressure change of the oil tank (1) is monitored by the third pressure detector (73), and the monitoring of each sensor is the same as above when the shock absorber is in the compression stroke.