Pressure parameter detection device and pressure parameter detection method for shock absorber oil seal

Abstract

The present invention relates to the technical field of oil seal detection, and provides a pressure parameter detection device and a pressure parameter detection method for a shock absorber oil seal. The pressure parameter detection device comprises: a fixed fixture for supporting the oil seal; a guide profiling fixture, the oil seal has an air sealing lip, the guide profiling fixture has a matching portion adapted to the air sealing lip, the matching portion abuts the air sealing lip to form a one-way valve; a first channel, connected to the conducting side of the one-way valve; a second channel, connected to the closed side of the one-way valve; the pressure parameter detection device has an open pressure detection state and / or a closed pressure detection state, in the open pressure detection state, the first channel passes the detection gas, in the closed pressure detection state, the second channel passes the detection gas. The present invention can accurately detect the opening pressure and closing pressure of the oil seal, and then compare with the design theoretical value of the pressure parameter of the oil seal, which can effectively identify whether the quality of the oil seal is qualified, so as to ensure that a qualified oil seal is used to effectively isolate the oil and gas between the inner and outer cylinders of the shock absorber.

Description

Technical Field

[0001] The invention relates to the technical field of oil seal detection, in particular to a pressure parameter detection device and a pressure parameter detection method for a shock absorber oil seal. Background Art

[0002] The oil seal is a key component of the shock absorber. It works with the guide of the shock absorber to isolate the oil and gas between the inner and outer cylinders of the shock absorber.

[0003] Among them, regarding the isolation of the air between the inner and outer cylinders of the shock absorber, Figure 1 and Figure 2 The three-dimensional structure and cross-sectional structure of the shock absorber oil seal are shown respectively. Figure 1 and Figure 2 As shown, the oil seal 10 has an air sealing lip 11. In addition, the guide is provided with an air sealing surface. The air sealing surface of the guide cooperates with the air sealing lip 11 of the oil seal 10 to form a one-way valve structure for preventing gas from entering the working chamber of the shock absorber inner cylinder to improve the foaming phenomenon.

[0004] In the design of oil seals, the opening pressure and closing pressure are key pressure parameters. The opening pressure is the pressure that makes the one-way valve structure conduct, and it needs to be within a suitable range so that the inner tube of the shock absorber can exhaust air to the outer tube. The closing pressure is used to measure the reverse pressure on the sealing lip of the oil seal during the operation of the shock absorber. The closing pressure needs to be as large as possible so that the one-way valve structure remains closed under the action of the reverse pressure to avoid reaching the limit of the pressure and causing damage to the oil seal.

[0005] How to effectively detect whether the opening pressure and closing pressure of the oil seal meet the design requirements to identify whether the quality of the oil seal is qualified is a problem that needs to be solved urgently.

[0006] 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 the prior art known to ordinary technicians in the field. Summary of the invention

[0007] The present invention provides a pressure parameter detection device and a pressure parameter detection method for a shock absorber oil seal, which can accurately detect the opening pressure and closing pressure of the oil seal, and then compare with the design theoretical value of the pressure parameter of the oil seal, so as to effectively identify whether the quality of the oil seal is qualified, so as to ensure that a qualified oil seal is used in the shock absorber, so that the oil seal can effectively isolate the oil and gas between the inner and outer cylinders of the shock absorber, and ensure the performance and service life of the shock absorber.

[0008] According to one aspect of the present invention, there is provided a pressure parameter detection device for a shock absorber oil seal, comprising: a fixed tooling arranged in a detection chamber, for supporting the oil seal; a guide profiling tooling, the oil seal having an air sealing lip, the guide profiling tooling having a mating portion adapted to the air sealing lip, the mating portion abutting the air sealing lip to form a one-way valve; a first channel, connected to the conducting side of the one-way valve; a second channel, connected to the closing side of the one-way valve; the pressure parameter detection device has an open pressure detection state and / or a closed pressure detection state, in the open pressure detection state, detection gas is passed into the first channel, and in the closed pressure detection state, detection gas is passed into the second channel.

[0009] The above-mentioned pressure parameter detection equipment, through the fixing tooling, stably supports the oil seal in the detection cavity with good sealing performance, so as to carry out pressure parameter testing; the guide profiling tooling is used for the guide of the profiling shock absorber, and the matching part of the guide profiling tooling accurately adapts to the air sealing lip of the oil seal, and the matching part abuts against the air sealing lip, so that the air sealing lip is tightly attached to the matching part, thereby ensuring the air tightness between the two and forming a one-way valve.

[0010] During the test, by introducing the test gas into the first channel on the conducting side connected to the one-way valve, the opening pressure of the oil seal can be effectively and conveniently detected. By introducing the test gas into the second channel on the closing side connected to the one-way valve, the closing pressure of the oil seal can be effectively and conveniently detected.

[0011] In this way, by using the above-mentioned pressure parameter detection equipment, the opening pressure and closing pressure of the oil seal can be accurately detected, and then compared with the design theoretical value of the pressure parameter of the oil seal, it can effectively identify whether the quality of the oil seal is qualified, so as to ensure that qualified oil seals are used in the shock absorber, so that the oil seal can effectively isolate the oil and gas between the inner and outer cylinders of the shock absorber, and ensure the performance and service life of the shock absorber.

[0012] In some embodiments, the air-sealing lip is formed as an outwardly expanded annular lip, and the mating portion has an air-sealing surface, and the air-sealing surface is pressed against the inner wall of the annular lip by interference fit.

[0013] The air sealing surface of the mating part is pressed against the inner wall of the annular lip by interference fit to form a reliable one-way valve, thereby improving the stability and accuracy of the pressure parameter test.

[0014] In some embodiments, the air sealing surface is an arc curved surface.

[0015] In this way, the contact surface between the mating part and the air sealing lip is an arc surface, which avoids the situation where the air sealing lip is easily folded due to the internal and external pressure difference when in flat contact, and can improve the accuracy of the detection results, especially the detection accuracy of the closing pressure of the oil seal.

[0016] In some embodiments, the first channel includes a first gap formed between a first groove of the guide contour tooling and the oil seal, and the first gap is connected to the conducting side of the one-way valve; the second channel includes a second gap formed between a second groove of the guide contour tooling and the oil seal, and an airflow channel opened on the guide contour tooling, the second gap is connected to the closed side of the one-way valve, and the airflow channel is connected to the second gap.

[0017] The conducting side of the one-way valve is connected through the first gap formed between the first groove of the guide contour tooling and the oil seal; the closing side of the one-way valve is connected through the air flow channel opened on the guide contour tooling and the second gap formed between the second groove of the guide contour tooling and the oil seal.

[0018] In some embodiments, both the first groove and the second groove are formed as arc grooves.

[0019] In this way, the detection gas flow introduced into the first channel / the second channel can stably act on the conducting side / the closing side of the one-way valve through the circular arc groove, so as to improve the accuracy of the detection result.

[0020] In some embodiments, the fixing fixture includes: a sealing gasket block, which is sealed with the bottom wall of the detection cavity, and the guide contouring fixture presses the edge of the oil seal against the sealing gasket block.

[0021] The edge of the oil seal is pressed against the sealing pad by the guide profiling tooling, so that the oil seal is stably supported in the detection cavity to improve the accuracy and stability of the pressure parameter test.

[0022] In some embodiments, one end face of the edge of the oil seal is provided with a convex ring which is interference fit with the sealing gasket, and the guide contour tooling is fitted with the other end face of the edge of the oil seal.

[0023] In this way, the matching stability and sealing performance between the edge of the oil seal and the sealing gasket and the guide contour tooling are improved.

[0024] In some embodiments, the fixing fixture includes: a pin, which passes through the center hole of the oil seal with interference fit and is fixed to the bottom wall of the detection cavity.

[0025] The center of the oil seal is fixed to the bottom wall of the detection cavity by a pin.

[0026] In some embodiments, the fixing fixture includes: a sealing gasket, which presses the guide contour fixture and seals with the side wall of the detection cavity; and a clearance gasket, which presses the sealing gasket and seals with the top wall of the detection cavity.

[0027] The guide contour tooling is pressed tightly by the sealing gasket and achieves a stable fit with the side wall of the detection cavity; the sealing gasket is pressed tightly by the clearance gasket and achieves a stable fit with the top wall of the detection cavity.

[0028] Thus, through the above-mentioned fixing tooling, on the one hand, the oil seal is stably fixed in the detection cavity as a whole to ensure the stability of the oil seal, and on the other hand, the sealing cooperation between the various parts of the oil seal is ensured, so that only the first channel and the second channel for pressure parameter detection are retained in the detection cavity to ensure the accuracy of the detection results.

[0029] In some embodiments, the detection cavity is formed by sealing and covering a base and a cover plate, and the cover plate and / or the base are provided with through holes respectively connecting the first channel and the second channel.

[0030] The base and the cover plate are sealed together to form a detection cavity with good sealing performance, and it is convenient to place fixed tooling, oil seals, guide contour tooling, etc. into the detection cavity; through holes opened in the cover plate and / or the base to connect the first channel and the second channel respectively, it is convenient to introduce gas and detect airflow conditions during pressure parameter testing.

[0031] According to another aspect of the present invention, there is provided a method for detecting pressure parameters of a shock absorber oil seal, which is implemented based on the pressure parameter detection equipment as described in any of the above embodiments, and comprises: introducing a detection gas into the first channel, and detecting the airflow condition of the second channel; when airflow is detected in the second channel, obtaining the accumulated air pressure introduced into the first channel as the opening pressure of the oil seal.

[0032] By introducing detection gas into the first channel on the conducting side connected to the one-way valve and detecting the airflow in the second channel, the opening pressure of the oil seal can be effectively and conveniently detected. By comparing the detected opening pressure with the design theoretical value of the opening pressure of the oil seal, it can be effectively identified whether the sealing lip of the oil seal can achieve the exhaust of the inner cylinder of the shock absorber to the outer cylinder under the action of a suitable positive pressure, thereby ensuring the quality of the oil seal and guaranteeing the performance and service life of the shock absorber.

[0033] According to another aspect of the present invention, there is provided a method for detecting pressure parameters of a shock absorber oil seal, which is implemented based on the pressure parameter detection device as described in any of the above embodiments, and comprises: introducing detection gas into the second channel and detecting the airflow condition of the first channel; when it is detected that the first channel generates airflow, determining that the closing pressure of the oil seal is unqualified; when the accumulated air pressure introduced into the second channel reaches the maximum detection pressure and the first channel does not generate airflow, determining that the closing pressure of the oil seal is qualified.

[0034] By introducing the test gas into the second channel connected to the closed side of the one-way valve and detecting the airflow in the first channel, the closing pressure of the oil seal can be effectively and conveniently detected. If the accumulated air pressure introduced into the second channel reaches the maximum test pressure (i.e., the design theoretical value of the closing pressure), and no airflow is generated in the first channel, it indicates that the sealing lip of the oil seal can withstand the reverse pressure that may be generated during the normal operation of the shock absorber and remain closed, so the closing pressure of the oil seal can be determined to be qualified; if airflow is generated in the first channel, it indicates that the reverse pressure borne by the sealing lip of the oil seal has exceeded its limit bearing pressure. At this time, the sealing lip will be deformed and bent due to the reverse pressure exceeding its limit bearing pressure, or even folded and leaked, causing the oil seal to be damaged and fail. In this case, the closing pressure of the oil seal can be determined to be unqualified.

[0035] The beneficial effects of the present invention compared with the prior art include at least:

[0036] The pressure parameter detection equipment of the present invention uses a fixing tool to stably support the oil seal in a detection cavity with good sealing performance to facilitate pressure parameter testing; the guide profiling tool is used for the guide of the profiling shock absorber, and the matching part of the guide profiling tool is precisely adapted to the air sealing lip of the oil seal, and the matching part abuts against the air sealing lip, so that the air sealing lip is tightly attached to the matching part, thereby ensuring the air tightness between the two and forming a one-way valve; during testing, the opening pressure of the oil seal can be effectively and conveniently detected by introducing detection gas into the first channel connected to the conducting side of the one-way valve, and the closing pressure of the oil seal can be effectively and conveniently detected by introducing detection gas into the second channel connected to the closing side of the one-way valve.

[0037] The invention has a simple structure and is easy to operate. It can accurately detect the opening pressure and closing pressure of the oil seal, and then compare them with the design theoretical value of the pressure parameter of the oil seal to effectively identify whether the quality of the oil seal is qualified, so as to ensure that the qualified oil seal is used in the shock absorber, so that the oil seal can effectively isolate the oil and gas between the inner and outer cylinders of the shock absorber, and ensure the performance and service life of the shock absorber.

[0038] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0040] Figure 1 A schematic diagram of the three-dimensional structure of the shock absorber oil seal is shown;

[0041] Figure 2 A schematic cross-sectional structure diagram of a shock absorber oil seal is shown;

[0042] Figure 3 A schematic structural diagram showing a pressure parameter detection device for a shock absorber oil seal according to an embodiment of the present invention;

[0043] Figure 4 A schematic diagram showing the cooperation between the cooperation portion of the guide profiling tooling and the gas sealing lip of the oil seal in the pressure parameter detection equipment of the shock absorber oil seal;

[0044] Figure 5 A schematic diagram showing the air flow of the pressure parameter detection device of the shock absorber oil seal when the pressure detection state is turned on;

[0045] Figure 6 A schematic diagram showing the air flow of the pressure parameter detection device of the shock absorber oil seal when the pressure detection state is closed;

[0046] Figure 7 A schematic diagram showing the steps of a method for detecting pressure parameters of a shock absorber oil seal in an embodiment of the present invention;

[0047] Figure 8 A schematic diagram showing the steps of another method for detecting pressure parameters of a shock absorber oil seal in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] 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. Instead, these embodiments are provided to make the present invention comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art.

[0049] The accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted. The words "first", "second" and similar words used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. The orientation or positional relationship indicated by the terms "top", "bottom", "side", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In addition, the processes shown in the drawings are only exemplary and do not necessarily include all the steps. For example, some steps may be decomposed, some steps may be combined or partially combined, and the actual execution order may be changed according to the actual situation.

[0051] It should be noted that, in the absence of conflict, the embodiments of the present invention and features in different embodiments may be combined with each other.

[0052] Figure 3 The structure of the pressure parameter detection device of the shock absorber oil seal in the embodiment of the present invention is shown. Figure 4 The figure shows the matching structure of the matching part of the guide profiling tooling and the sealing lip of the oil seal in the pressure parameter detection equipment of the shock absorber oil seal. Figure 5 The airflow direction of the shock absorber oil seal pressure parameter detection device is shown in the open pressure detection state. Figure 6 The airflow direction of the pressure parameter detection device of the shock absorber oil seal is shown in the closed pressure detection state; combined with Figures 1 to 6 As shown, the pressure parameter detection device of the shock absorber oil seal provided by the embodiment of the present invention includes:

[0053] A fixed fixture for supporting the oil seal 10;

[0054] The guide profiling tooling 20, the oil seal 10 has a gas sealing lip 11, the guide profiling tooling 20 has a matching portion 22 adapted to the gas sealing lip 11, and the matching portion 22 abuts against the gas sealing lip 11 to form a one-way valve;

[0055] A first passage P1 is connected to the conducting side 30a of the one-way valve;

[0056] A second passage P2, communicating with the closed side 30b of the one-way valve;

[0057] The pressure parameter detection device has an open pressure detection state and / or a closed pressure detection state. In the open pressure detection state, detection gas is passed into the first channel P1, and in the closed pressure detection state, detection gas is passed into the second channel P2.

[0058] The above-mentioned pressure parameter detection equipment, through the fixing tooling, stably supports the oil seal 10 in the detection cavity with good sealing performance, so as to perform pressure parameter testing; the guide profiling tooling 20 is used for the guide of the profiling shock absorber, and the matching part 22 of the guide profiling tooling 20 is precisely adapted to the air sealing lip 11 of the oil seal 10, and the matching part 22 abuts against the air sealing lip 11, so that the air sealing lip 11 is tightly attached to the matching part 22, thereby ensuring the air tightness between the two and forming a one-way valve.

[0059] During the test, by introducing the test gas into the first channel P1 connected to the conducting side 30a of the one-way valve, the opening pressure of the oil seal 10 can be effectively and conveniently detected. By introducing the test gas into the second channel P2 connected to the closing side 30b of the one-way valve, the closing pressure of the oil seal 10 can be effectively and conveniently detected.

[0060] In this way, by using the above-mentioned pressure parameter detection equipment, the opening pressure and closing pressure of the oil seal 10 can be accurately detected, and then compared with the design theoretical value of the pressure parameter of the oil seal 10, it can effectively identify whether the quality of the oil seal 10 is qualified, so as to ensure that the qualified oil seal 10 is used in the shock absorber, so that the oil seal 10 can effectively isolate the oil and gas between the inner and outer cylinders of the shock absorber, and ensure the performance and service life of the shock absorber.

[0061] In some embodiments, the air-sealing lip 11 is formed as an outwardly expanded annular lip, and the mating portion 22 has an air-sealing surface 220 , which is pressed against the inner wall 110 of the annular lip by interference fit.

[0062] The air sealing surface 220 of the matching portion 22 is pressed against the inner wall 110 of the annular lip by interference, so as to form a reliable one-way valve, thereby improving the stability and accuracy of the pressure parameter test.

[0063] In some embodiments, the air sealing surface 220 is an arc surface.

[0064] If the air sealing surface 220 is a plane, the matching portion 22 and the air sealing lip 11 form a plane contact; during the closing pressure test, the air sealing lip 11 is easily folded due to the internal and external pressure difference. By designing the air sealing surface 220 as a circular arc surface, the contact surface between the matching portion 22 and the air sealing lip 11 is a circular arc surface, avoiding the situation where the air sealing lip 11 is easily folded due to the internal and external pressure difference in the case of plane contact, which can improve the accuracy of the test results, especially improve the accuracy of the test of the closing pressure of the oil seal 10.

[0065] In some embodiments, the first channel P1 includes a first gap formed between a first groove 22a of the guide contour tooling 20 and the oil seal 10, and the first gap is connected to the conducting side 30a of the one-way valve; the second channel P2 includes a second gap formed between a second groove 22b of the guide contour tooling 20 and the oil seal 10, and an airflow channel 22c opened on the guide contour tooling 20, and the second gap is connected to the closed side 30b of the one-way valve, and the airflow channel is connected to the second gap.

[0066] The conducting side 30a of the one-way valve is connected through the first gap formed between the first groove 22a of the guide contour tooling 20 and the oil seal 10; the closing side 30b of the one-way valve is connected through the air flow channel 22c opened on the guide contour tooling 20 and the second gap formed between the second groove 22b of the guide contour tooling 20 and the oil seal 10.

[0067] In some embodiments, the first groove 22a and the second groove 22b are both formed as arc grooves, so that the detection gas flow introduced into the first channel P1 / the second channel P2 can stably act on the conducting side 30a / the closing side 30b of the one-way valve through the arc grooves, thereby improving the accuracy of the detection result.

[0068] In some embodiments, the fixing fixture includes: a sealing pad 42 that seals with the bottom wall of the detection cavity, and the guide contour fixture 20 presses the edge 15 of the oil seal 10 against the sealing pad 42.

[0069] The edge 15 of the oil seal 10 is pressed against the sealing pad 42 by the guide contour tooling 20, so that the oil seal 10 is stably supported in the detection cavity, so as to improve the accuracy and stability of the pressure parameter test.

[0070] In some embodiments, one end surface of the edge 15 of the oil seal 10 is provided with a convex ring 16 that is interference-fitted with the sealing pad 42, and the guide profiling tooling 20 is fitted with the other end surface of the edge 15 of the oil seal 10. In this way, the matching stability and sealing performance between the edge 15 of the oil seal 10, the sealing pad 42 and the guide profiling tooling 20 are improved.

[0071] In some embodiments, the fixing fixture includes: a pin 43, which passes through the center hole 18 of the oil seal 10 and is fixed to the bottom wall of the detection cavity. The center of the oil seal 10 is fixed to the bottom wall of the detection cavity through the pin 43.

[0072] In some embodiments, the fixing fixture includes: a sealing gasket 46, which presses the guide contour fixture 20 and seals with the side wall of the detection cavity; and a clearance gasket 47, which presses the sealing gasket 46 and seals with the top wall of the detection cavity.

[0073] The guide contour tooling 20 is pressed by the sealing gasket 46 to achieve a stable fit with the side wall of the detection cavity; the sealing gasket 46 is pressed by the clearance gasket 47 to achieve a stable fit with the top wall of the detection cavity.

[0074] Through the above-mentioned fixing fixture, on the one hand, the oil seal 10 is stably fixed in the detection cavity as a whole to ensure the stability of the oil seal 10, and on the other hand, the sealing cooperation between various parts of the oil seal 10 is ensured, so that only the first channel P1 and the second channel P2 for pressure parameter detection are retained in the detection cavity to ensure the accuracy of the detection result.

[0075] The sealing gasket block 42 and the bottom wall of the detection chamber, the sealing gasket 46 and the guide contour tooling 20, and the sealing gasket 46 and the side wall of the detection chamber can be sealed by the sealing rings. The gap gasket 47 and the sealing gasket 46 can be pressed and fitted by screws.

[0076] In some embodiments, the detection cavity is formed by sealing and covering the base 52 and the cover plate 53, and the cover plate 53 and / or the base 52 are provided with through holes respectively connecting the first channel P1 and the second channel P2.

[0077] The base 52 and the cover plate 53 are sealed together to form a detection cavity with good sealing performance, and it is convenient to place the fixing tool, oil seal 10, guide contour tool 20, etc. into the detection cavity; the through holes opened through the cover plate 53 and / or the base 52 respectively connecting the first channel P1 and the second channel P2 facilitate the introduction of gas and the detection of airflow conditions during pressure parameter testing.

[0078] Specifically, a first through hole 530 connected to the first channel P1 may be provided on the cover plate 53, and a second through hole 520 connected to the second channel P2 may be provided on the base 52. When the pressure detection is turned on, the detection gas may be introduced through the first through hole 530, and the airflow condition may be detected through the second through hole 520; when the pressure detection is turned off, the detection gas may be introduced through the second through hole 520, and the airflow condition may be detected through the first through hole 530.

[0079] An embodiment of the present invention also provides a pressure parameter detection method for a shock absorber oil seal, which can be implemented based on the pressure parameter detection device described in any of the above embodiments to achieve accurate and convenient detection of the opening pressure and closing pressure of the shock absorber oil seal.

[0080] Figure 7 The main steps of a pressure parameter detection method for a shock absorber oil seal in an embodiment of the present invention are shown; Figures 2 to 5 ,as well as Figure 7 As shown, the opening pressure detection of the shock absorber oil seal is performed using the pressure parameter detection equipment of the shock absorber oil seal, including:

[0081] S700a, introducing a test gas into the first channel P1, and detecting the gas flow in the second channel P2;

[0082] S700b, when it is detected that the second channel P2 generates airflow, the accumulated air pressure introduced into the first channel P1 is obtained as the opening pressure of the oil seal 10.

[0083] By introducing the detection gas into the first channel P1 connected to the conducting side 30a of the one-way valve (the direction of the air flow is shown by the arrow R1), and detecting the air flow in the second channel P2 (the direction of the air flow is shown by the arrow R1'), the opening pressure of the oil seal 10 can be effectively and conveniently detected. By comparing the detected opening pressure with the design theoretical value of the opening pressure of the oil seal 10, it can be effectively identified whether the sealing lip 11 of the oil seal 10 can achieve the exhaust of the inner cylinder of the shock absorber to the outer cylinder under the action of a suitable positive pressure, thereby ensuring the quality of the oil seal 10 and ensuring the performance and service life of the shock absorber.

[0084] Figure 8 The main steps of another pressure parameter detection method for the shock absorber oil seal in the embodiment of the present invention are shown; Figures 2 to 4 , Figure 6 as well as Figure 8As shown, the closing pressure detection of the shock absorber oil seal is performed using the pressure parameter detection equipment of the shock absorber oil seal, including:

[0085] S800a, introducing a test gas into the second channel P2, and detecting the gas flow condition of the first channel P1;

[0086] S800b, when it is detected that the first channel P1 generates airflow, it is determined that the closing pressure of the oil seal 10 is unqualified;

[0087] S800c, when the accumulated air pressure introduced into the second channel P2 reaches the maximum detection pressure and the first channel P1 does not generate airflow, it is determined that the closing pressure of the oil seal 10 is qualified.

[0088] By introducing a test gas (the direction of the gas flow is shown by arrow R2) into the second channel P2 connected to the closed side 30b of the one-way valve, and detecting the gas flow of the first channel P1, the closing pressure of the oil seal 10 can be effectively and conveniently detected. If the accumulated gas pressure introduced into the second channel P2 reaches the maximum test pressure (i.e., the design theoretical value of the closing pressure), and the first channel P1 does not generate gas flow, it indicates that the gas sealing lip 11 of the oil seal 10 can withstand the reverse pressure that may be generated during the normal operation of the shock absorber and remain closed, so the closing pressure of the oil seal 10 can be determined to be qualified. Among them, the maximum test pressure is, for example, 30 bar, but not limited to this. If the first channel P1 generates gas flow (the direction of the gas flow is shown by arrow R2'), it indicates that the reverse pressure borne by the gas sealing lip 11 of the oil seal 10 has exceeded its limit bearing pressure. At this time, the gas sealing lip 11 will be deformed and bent due to the reverse pressure exceeding its limit bearing pressure, or even folded and leaked, causing the oil seal 10 to be damaged and fail. In this case, the closing pressure of the oil seal 10 can be determined to be unqualified.

[0089] In summary, the shock absorber oil seal pressure parameter detection device and pressure parameter detection method provided by the present invention have a simple structure and are easy to operate. They can accurately and conveniently detect the opening pressure and closing pressure of the oil seal 10, and then compare them with the design theoretical value of the pressure parameter of the oil seal 10 to effectively identify whether the quality of the oil seal 10 is qualified, so as to ensure that the qualified oil seal 10 is used in the shock absorber, so that the oil seal 10 can effectively isolate the oil and gas between the inner and outer cylinders of the shock absorber, and ensure the performance and service life of the shock absorber.

[0090] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is 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. A pressure parameter detection device for a shock absorber oil seal, characterized in that: The oil seal of the shock absorber is provided with an air sealing lip, and the air sealing lip is used to cooperate with the guide of the shock absorber to form a one-way valve structure that allows one-way conduction; The pressure parameter detection device includes: Fixed fixture for supporting oil seal; A guide contour tooling, having a matching portion adapted to the air sealing lip, wherein the matching portion abuts against the air sealing lip to form a one-way valve; Wherein, the air-sealing lip is formed as an outwardly expanded annular lip, the matching portion has an air-sealing surface, the air-sealing surface is an arc curved surface, and the air-sealing surface is pressed against the inner wall of the annular lip by interference; A first channel connected to the conducting side of the one-way valve; a second passage communicating with a closed side of the one-way valve; The pressure parameter detection device has an open pressure detection state and a closed pressure detection state; in the open pressure detection state, detection gas is passed into the first channel so that the gas pressure acts on the conduction side of the one-way valve; in the closed pressure detection state, detection gas is passed into the second channel so that the gas pressure acts on the closed side of the one-way valve.

2. The pressure parameter detection device according to claim 1, characterized in that: The first passage includes a first gap formed between a first groove of the guide contour tooling and the oil seal, the first gap being in communication with a conducting side of the one-way valve; The second channel includes a second gap formed between the second groove of the guide contour tooling and the oil seal, and an air flow channel opened on the guide contour tooling, the second gap is connected to the closed side of the one-way valve, and the air flow channel is connected to the second gap.

3. The pressure parameter detection device according to claim 2, characterized in that: The first groove and the second groove are both formed as arc grooves.

4. The pressure parameter detection device according to claim 1, characterized in that: The fixed tooling comprises: The sealing pad is in sealing cooperation with the bottom wall of the detection cavity, and the guide contour tooling presses the edge of the oil seal against the sealing pad.

5. The pressure parameter detection device according to claim 4, characterized in that: One end face of the edge of the oil seal is provided with a convex ring which is interference-fitted with the sealing pad, and the guide contour tooling is fitted with the other end face of the edge of the oil seal.

6. The pressure parameter detection device according to claim 1, characterized in that: The fixed tooling comprises: A pin is inserted through the center hole of the oil seal and is fixed to the bottom wall of the detection cavity.

7. The pressure parameter detection device according to claim 1, characterized in that: The fixed tooling comprises: A sealing gasket, pressing the guide contour tooling and sealingly cooperating with the side wall of the detection cavity; The gap gasket compresses the sealing gasket and is in sealing cooperation with the top wall of the detection cavity.

8. The pressure parameter detection device according to any one of claims 1 to 7, characterized in that: The detection cavity is formed by sealing and covering the base and the cover plate, and the cover plate and / or the base are provided with through holes respectively communicating with the first channel and the second channel.

9. A method for detecting pressure parameters of a shock absorber oil seal, characterized in that: The pressure parameter detection device according to any one of claims 1 to 8 is implemented, comprising: Introducing a test gas into the first channel so that the gas pressure acts on the conduction side of the one-way valve, and detecting the gas flow condition of the second channel; When it is detected that the second channel generates airflow, the accumulated air pressure introduced into the first channel is obtained as the opening pressure of the oil seal; Introducing a detection gas into the second channel so that the gas pressure acts on the closed side of the one-way valve, and detecting the gas flow condition of the first channel; When it is detected that the first channel generates airflow, determining that the closing pressure of the oil seal is unqualified; When the accumulated air pressure introduced into the second channel reaches the maximum detection pressure and the first channel does not generate airflow, it is determined that the closing pressure of the oil seal is qualified.

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