Sealing element, guider, shock absorber and carrier

Abstract

The utility model relates to the field of sealing, and discloses a sealing element, a guider, a shock absorber and a carrier. The sealing element comprises a sealing sleeve which is at least partially arranged in the center hole; the flange part is annularly arranged on the outer side of the sealing sleeve and is used for being connected with a guider; the first sealing ring sleeves the outer side of the sealing sleeve, one end of the first sealing ring is connected with the flange part, and the other end of the first sealing ring forms a flaring in the direction away from the flange part; the second sealing ring and the first sealing ring are located on the same side of the flange part, the sealing sleeve is sleeved with the second sealing ring, one end of the second sealing ring is connected with the sealing sleeve, and the other end of the second sealing ring forms a flaring in the direction away from the flange part. The first sealing ring and the first annular groove form one-way sealing, the second sealing ring and the second annular groove form one-way sealing, when any one of the first sealing ring and the second sealing ring is abraded or blocked by impurities, and sealing fails, the other one can be used for standby application, gas outside the working cylinder is prevented from entering the working cylinder, and the working cylinder is prevented from being damaged. Therefore, the reliability and the service life of the sealing element are improved.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, specifically to sealing components, guides, vibration dampers, and carriers. Background Technology

[0002] A shock absorber typically includes a working cylinder, a piston rod, a guide, and a seal. The guide is located at the cylinder bore of the working cylinder and fitted onto the outside of the piston rod to guide the piston rod. The seal is located between the guide and the piston rod, forming a seal between them.

[0003] To allow gas in the working cylinder to escape into the oil reservoir, the inner wall of the guide's central hole is provided with an annular groove. The guide also has an exhaust port, one end of which communicates with the annular groove, and the other end is located on the outer wall of the guide and communicates with the oil reservoir. A sealing ring is provided on the seal, abutting against the bottom of the annular groove. When the pressure inside the working cylinder is too high, the gas pushes the sealing ring to deform, entering the exhaust port through the gap between the sealing ring and the annular groove and escaping into the oil reservoir. Meanwhile, the gas inside the oil reservoir presses the sealing ring tightly against the bottom of the annular groove, ensuring that the sealing ring can only open in one direction.

[0004] However, the sealing ring is prone to wear after long-term use, leading to seal failure. Utility Model Content

[0005] In view of this, the present invention provides a seal, a guide, a vibration damper, and a carrier to solve or improve the problem of easy wear and failure of sealing rings after long-term operation.

[0006] In a first aspect, this utility model provides a sealing element for a guide, wherein the guide has a first annular groove and a second annular groove arranged axially on the wall of its central hole, and the sealing element includes:

[0007] A sealing sleeve, at least partially provided in the central hole;

[0008] A flange portion is arranged around the outside of the sealing sleeve and is used to connect with the guide.

[0009] A first sealing ring is fitted on the outside of the sealing sleeve. One end of the first sealing ring is connected to the flange portion, and the other end is flared in a direction away from the flange portion and is used to abut against the end face of the first ring groove near the second ring groove.

[0010] The second sealing ring is located on the same side of the flange as the first sealing ring and is sleeved on the outside of the sealing sleeve. One end of the second sealing ring is connected to the sealing sleeve, and the other end forms a flared opening in the direction away from the flange, and is used to abut against the end face of the second ring groove away from the first ring groove.

[0011] In one optional embodiment, the first sealing ring includes an annular seat and a first conical ring. Along the direction from the end of the first sealing ring near the flange to the end away from the flange, the wall thickness of the annular seat gradually decreases. The annular seat is connected to the flange. The constricted end of the first conical ring is connected to the annular seat. The flared end of the first conical ring is used to abut against the first annular groove.

[0012] And / or, the second sealing ring includes a second conical ring, the constricted end of which is connected to the sealing sleeve, and the flared end of which is used to abut against the second ring groove.

[0013] In one alternative embodiment, the inner wall of the sealing sleeve is provided with at least two axially distributed recesses, so that the sealing sleeve forms at least three axially arranged sealing lips.

[0014] In one optional embodiment, the outer wall of the sealing sleeve is provided with mounting ring grooves for fitting elastic elements, and the number of mounting ring grooves is at least two, with the at least two mounting ring grooves arranged along the axial direction of the sealing sleeve.

[0015] In one alternative embodiment, the seal further includes a skeleton configured as an annular structure, at least a portion of which is disposed inside the flange portion.

[0016] Secondly, this utility model also provides a guide for adapting to the seal as described above, the guide having:

[0017] A central hole, the wall of which is provided with a first annular groove and a second annular groove distributed along the axial direction. The end face of the first annular groove near the second annular groove is used to abut against the first sealing ring, and the end face of the second annular groove away from the first annular groove is used to abut against the second sealing ring.

[0018] An exhaust port is provided, with one end located in the first annular groove and the other end located on the outer wall of the guide.

[0019] In one optional embodiment, a third annular groove is further provided on the wall of the central hole. The third annular groove is located on the side of the first annular groove away from the second annular groove, and the third annular groove is used to accommodate the flange portion.

[0020] In one optional embodiment, a first protrusion is provided on the end face of the first annular groove near the second annular groove. The first protrusion is provided on the side of the first sealing ring near the sealing sleeve and limits the first sealing ring.

[0021] And / or, a second protrusion is provided on the end face of the second annular groove away from the first annular groove. The second protrusion is provided on the side of the second sealing ring near the sealing sleeve and limits the position of the second sealing ring.

[0022] Thirdly, this utility model also provides a vibration damper, including the seal as described above, or the guide as described above.

[0023] Fourthly, this utility model also provides a carrier, including the seal, guide, or shock absorber as described above.

[0024] The sealing element provided by this utility model has a first sealing ring and a second sealing ring forming a one-way seal with the first ring groove and the second ring groove, respectively. When either the first sealing ring or the second sealing ring fails to seal due to wear or impurities, the other can be used as a backup to prevent gas outside the working cylinder from entering the working cylinder, thereby improving the reliability, service life and maintenance cycle of the sealing element.

[0025] The guide, damper, and carrier provided by this utility model contain the same or corresponding technical features as the sealing element provided by this utility model, and therefore also contain the above-mentioned technical effects of the sealing element, so they will not be described in detail here. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 A schematic diagram of a seal and guide installed on a piston rod according to an embodiment of this utility model;

[0028] Figure 2 A schematic diagram of the structure of the seal and guide provided in the embodiment of this utility model;

[0029] Figure 3 A schematic diagram of the structure of the sealing element provided in the embodiment of this utility model;

[0030] Figure 4 A schematic diagram of the guide provided in an embodiment of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Seal; 101. Sealing sleeve; 1011. First sealing lip; 1012. Second sealing lip; 1013. Third sealing lip; 1014. Mounting ring groove; 1015. Recess; 102. Flange; 103. First sealing ring; 1031. Annular seat; 1032. First conical ring; 104. Second sealing ring; 105. Skeleton; 2. Guide; 201. Center hole; 202. First annular groove; 203. Second annular groove; 204. Vent hole; 2041. First orifice; 2042. Second orifice; 205. Third annular groove; 206. First protrusion; 207. Second protrusion; 3. Piston rod; 4. Elastic element. Detailed Implementation

[0033] 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 with reference to the accompanying drawings. 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.

[0034] In related technologies, to allow the gas in the working cylinder to be discharged into the oil reservoir, the inner wall of the guide's central hole is provided with an annular groove. The guide also has an exhaust port, one end of which communicates with the annular groove, and the other end is located on the outer wall of the guide and communicates with the oil reservoir. The sealing element has a sealing ring that abuts against the bottom of the annular groove.

[0035] When the gas pressure inside the working cylinder is too high, the gas pushes the sealing ring to deform, enters the exhaust port through the gap between the sealing ring and the ring groove, and is discharged into the oil reservoir. Meanwhile, the gas inside the oil reservoir presses the sealing ring tightly against the bottom of the ring groove, so that the sealing ring can only open in one direction.

[0036] However, sealing rings are prone to wear after prolonged use, leading to seal failure. To address or improve the problem of seals easily wearing out and failing after long-term operation, this invention provides a seal, a guide, a vibration damper, and a carrier.

[0037] The following is combined with Figures 1 to 4 The following describes the sealing element 1 provided in the embodiments of this utility model.

[0038] Specifically, the seal 1 is used for the guide 2, that is, the seal 1 is used to connect with or cooperate with the guide 2. The guide 2 has a first annular groove 202 and a second annular groove 203 on the wall of the central hole 201, and the first annular groove 202 and the second annular groove 203 are arranged along the axial direction of the guide 2.

[0039] Furthermore, the seal 1 includes a sealing sleeve 101, a flange portion 102, a first sealing ring 103, and a second sealing ring 104.

[0040] At least a portion of the sealing sleeve 101 is disposed within the central hole 201 of the guide 2, and the sealing sleeve 101 is also used to be fitted onto the outside of the piston rod 3 and to seal against the piston rod 3.

[0041] The flange portion 102 is circumferentially disposed on the outside of the sealing sleeve 101 and is used to connect with the guide 2. Optionally, the flange portion 102 is configured as an annular flange, and the flange portion 102 and the sealing sleeve 101 are integrally formed.

[0042] The first sealing ring 103 is sleeved on the outside of the sealing sleeve 101. Specifically, the first sealing ring 103 is sleeved on the portion of the sealing sleeve 101 located inside the central hole 201. One end of the first sealing ring 103 is connected to the flange portion 102, and the other end of the first sealing ring 103 forms a flared opening in a direction away from the flange portion 102. The flared opening of the first sealing ring 103 is used to abut against the end face of the first annular groove 202 near the second annular groove 203. For example, refer to... Figure 4 As shown, the end face of the first annular groove 202 near the second annular groove 203 is end face A in the figure.

[0043] It should be noted that, in use, the first annular groove 202 and the second annular groove 203 are located on the same side of the flange portion 102, and the second annular groove 203 is located on the side of the first annular groove 202 away from the flange portion 102.

[0044] Furthermore, the guide 2 has a vent 204, which has a first opening 2041 and a second opening 2042. The first opening 2041 is located on the inner wall of the first annular groove 202, and is located on the side of the first sealing ring 103 away from the sealing sleeve 101, or in other words, the first opening 2041 is located on the outer side of the first sealing ring 103. The second opening 2042 is located on the outer wall of the guide 2.

[0045] The second sealing ring 104 and the first sealing ring 103 are located on the same side of the flange portion 102. Specifically, the second sealing ring 104 and the first sealing ring 103 are both located on the side of the flange portion 102 close to the inner cavity of the shock absorber.

[0046] Furthermore, a second sealing ring 104 is sleeved on the outside of the sealing sleeve 101. One end of the second sealing ring 104 is connected to the sealing sleeve 101, and the other end of the second sealing ring 104 forms a flared opening in a direction away from the flange portion 102. The flared opening of the second sealing ring 104 is used to abut against the end face of the second annular groove 203 away from the first annular groove 202. For example, refer to... Figure 4 As shown, the end face of the second annular groove 203 that is away from the first annular groove 202 is end face B in the figure.

[0047] In this embodiment, reference is made to Figure 1 and Figure 2 As shown, when the pressure inside the working cylinder of the shock absorber is too high, the gas first drives the second sealing ring 104 to deform in a direction away from the end face B of the second ring groove 203, so that a gap is generated between the second sealing ring 104 and the end face B of the second ring groove 203, thereby allowing the gas to be discharged through the gap between the second sealing ring 104 and the end face B of the second ring groove 203.

[0048] The gas discharged through the second sealing ring 104 further drives the first sealing ring 103 to deform in a direction away from the end face A of the first ring groove 202, so that a gap is created between the first sealing ring 103 and the end face A of the first ring groove 202, so that the gas can be discharged through the gap between the first sealing ring 103 and the end face A of the first ring groove 202.

[0049] Finally, the gas discharged through the first sealing ring 103 can enter the exhaust port 204 through the first orifice 2041, and then be discharged to the oil storage cylinder through the second orifice 2042 of the exhaust port 204.

[0050] Conversely, since the end of the first sealing ring 103 that abuts against the end face A is flared, the gas in the oil reservoir enters the first ring groove 202 through the exhaust hole 204 and acts on the outside of the first sealing ring 103, which can press the first sealing ring 103 against the end face A, thereby preventing the gas from passing through the gap between the first sealing ring 103 and the end face A.

[0051] Similarly, the end of the second sealing ring 104 that abuts against the end face B is flared. Therefore, even if gas enters through the first sealing ring 103, the gas acts on the outside of the second sealing ring 104, which can press the second sealing ring 104 tightly against the end face B, thereby preventing the gas from entering the inner cavity of the shock absorber through the gap between the second sealing ring 104 and the end face B.

[0052] With this configuration, the first sealing ring 103 and the second sealing ring 104 form a one-way seal with the first ring groove 202 and the second ring groove 203, respectively. When either the first sealing ring 103 or the second sealing ring 104 fails to seal due to wear or impurities, the other can serve as a backup to prevent gas in the oil reservoir from entering the working cylinder, thereby improving the reliability, service life and maintenance cycle of the seal 1.

[0053] In addition, by forming a one-way seal with the first sealing ring 103 and the second sealing ring 104 respectively with the first ring groove 202 and the second ring groove 203, the sealing effect between the seal 1 and the guide 2 can be improved. For example, it can prevent external air or impurities from entering the working cylinder through the gap between the seal 1 and the guide 2 along the axial direction of the center hole of the guide 2.

[0054] In some embodiments provided by this utility model, the sealing sleeve 101, the flange portion 102, the first sealing ring 103 and the second sealing ring 104 are configured as an integral structure. For example, the sealing sleeve 101, the flange portion 102, the first sealing ring 103 and the second sealing ring 104 are configured as an integral rubber structure or an integral silicone structure.

[0055] In this embodiment, the integrated structure avoids gaps between multiple components, reduces possible gas leakage paths, and improves sealing performance. Furthermore, installation is more convenient; the seal 1 can be installed as a whole into the guide 2, reducing installation difficulty and time.

[0056] refer to Figure 3 As shown, in some embodiments provided by this utility model, the first sealing ring 103 includes an annular seat 1031 and a first conical ring 1032.

[0057] The wall thickness of the annular seat 1031 gradually decreases from one end of the first sealing ring 103 near the flange 102 to the other end of the first sealing ring 103 away from the flange 102. The annular seat 1031 is connected to the flange 102, and the constricted end of the first conical ring 1032 is connected to the annular seat 1031, specifically, the constricted end of the first conical ring 1032 is connected to the end of the annular seat 1031 away from the flange 102. The flared end of the first conical ring 1032 abuts against the first annular groove 202; specifically, the flared end of the first conical ring 1032 abuts against the end face A of the first annular groove 202 near the second annular groove 203.

[0058] It is understandable that the constricted end of the first conical ring 1032 is the end with a relatively smaller cross-section, and the flared end of the first conical ring 1032 is the end with a relatively larger cross-section.

[0059] In this embodiment, the wall thickness of the annular seat 1031 gradually decreases from the flange portion 102 to the distal end, forming a stiffness gradient. The strength at the connection between the thick-walled end and the flange portion 102 is increased, avoiding stress concentration or root tearing under long-term vibration. The thin-walled end of the annular seat 1031 has higher elasticity, allowing the first conical ring 1032 to deform flexibly and reducing the opening pressure threshold.

[0060] refer to Figure 3 As shown, in some embodiments provided by this utility model, the second sealing ring 104 includes a second conical ring. The constricted end of the second conical ring is connected to the sealing sleeve 101, and the flared end of the second conical ring is used to abut against the second ring groove 203. Specifically, the flared end of the second conical ring abuts against the end face B of the second ring groove 203 away from the first ring groove 202.

[0061] It is understandable that the constricted end of the second conical ring is the end with a relatively smaller cross-section, and the flared end of the second conical ring is the end with a relatively larger cross-section.

[0062] In this embodiment, the flared end of the second conical ring abuts against the end face B of the second ring groove 203 away from the first ring groove 202. When the pressure inside the working cylinder is too high, under the action of gas pressure, the second conical ring is easy to deform in the direction away from the end face B, so that the gas can be smoothly discharged through the gap between the second sealing ring 104 and the end face B of the second ring groove 203.

[0063] The gas pressure in the oil reservoir will cause the flared end of the second conical ring to fit better against the end face B, forming a tight seal, effectively preventing gas from entering from the gap between the second ring groove 203 and the second sealing ring 104, thus improving the sealing performance.

[0064] The second sealing ring 104 is composed solely of a second conical ring, resulting in a relatively simple structure that reduces the number and complexity of parts, facilitating manufacturing and installation, and lowering costs. Furthermore, this simple structure better accommodates the spatial layout of the guide 2, making the overall structure of the seal 1 and guide 2 more compact.

[0065] refer to Figures 1-3 As shown, the inner wall of the sealing sleeve 101 is provided with at least two axially distributed recesses 1015, so that the sealing sleeve 101 forms at least three axially arranged sealing lips.

[0066] In this embodiment, during long-term use, the sealing lip and piston rod 3 may experience wear due to friction, or the fitting clearance may differ due to manufacturing tolerances. Multiple sealing lips can compensate for these wear and tolerances to a certain extent. Even if one sealing lip wears or its sealing performance deteriorates, the other sealing lips can still maintain a good sealing effect, extending the overall service life of the sealing sleeve 101 and improving the reliability of the seal.

[0067] Further, refer to Figures 1-3 As shown, the sealing sleeve 101 is formed with a first sealing lip 1011, a second sealing lip 1012 and a third sealing lip 1013. Specifically, the first sealing lip 1011, the second sealing lip 1012 and the third sealing lip 1013 are all conical rings, and all three abut against the outer wall of the piston rod 3.

[0068] In this design, the flared end of the first sealing lip 1011 is connected to the flange portion 102, and the constricted end of the first sealing lip 1011 extends toward the flange portion 102 away from the first sealing ring 103 and is used to abut against the piston rod 3. For example, at least a portion of the first sealing lip 1011 is provided on the side of the flange portion 102 away from the first sealing ring 103, and the first sealing lip 1011 is configured as a tapered ring.

[0069] The flared end of the second sealing lip 1012 is connected to the flange portion 102, and the constricted end of the second sealing lip 1012 extends away from the first sealing lip 1011 and is used to abut against the piston rod 3. For example, at least a portion of the second sealing lip 1012 is disposed on the side of the flange portion 102 away from the first sealing lip 1011, and the second sealing lip 1012 is configured as a tapered ring.

[0070] The flared end of the third sealing lip 1013 is connected to the second sealing lip 1012, and the constricted end of the third sealing lip 1013 extends away from the second sealing lip 1012 and is used to abut against the piston rod 3. For example, the third sealing lip 1013 is configured as a tapered ring, and the flared end of the third sealing lip 1013 is connected to the end of the second sealing lip 1012 away from the flange portion 102.

[0071] In this embodiment, sealing lips with different orientations can work together to achieve a better sealing effect.

[0072] Specifically, the constricted end of the first sealing lip 1011 extends toward the flange portion 102 away from the first sealing ring 103. External pressure acts on the outer wall of the first sealing lip 1011, which can make the first sealing lip 1011 fit better with the piston rod 3, thereby resisting liquid impurities or particulate impurities from the outside.

[0073] The constricted end of the third sealing lip 1013 extends away from the second sealing lip 1012. Under the internal pressure of the shock absorber, the third sealing lip 1013 can better seal against the piston rod 3, thereby better sealing the pressure and medium inside the shock absorber cavity.

[0074] The second sealing lip 1012 extends away from the first sealing lip 1011, and the second sealing lip 1012 plays a supplementary and reinforcing role in sealing between the first sealing lip 1011 and the third sealing lip 1013.

[0075] For example, the first sealing lip 1011 can be used to reduce the entry of impurities, and the third sealing lip 1013 can be used to reduce the pressure and media leakage of the damper. This arrangement allows the sealing sleeve 101 to adapt to a variety of complex working conditions, improving the adaptability and reliability of the sealing structure.

[0076] Optionally, refer to Figures 1-3 As shown, the recess 1015 formed between the first sealing lip 1011 and the second sealing lip 1012, or the recess 1015 formed between the second sealing lip 1012 and the third sealing lip 1013, is used to fill a lubricant, which can be a lubricating oil or a lubricating grease.

[0077] In this embodiment, by filling the recess 1015 formed between adjacent sealing lips with lubricant, the piston rod 3 can be lubricated by the lubricant, avoiding the problem of dry friction between the piston rod 3 and the seal 1, and extending the service life of the seal 1.

[0078] In some embodiments of this utility model, the outer wall of the sealing sleeve 101 is provided with a mounting ring groove 1014 for fitting the elastic element 4, and the elastic element 4 may be a spring. The number of mounting ring grooves 1014 is at least two, and the at least two mounting ring grooves 1014 are arranged along the axial direction of the sealing sleeve 101.

[0079] In this embodiment, the elastic force provided by the elastic element 4 allows the sealing sleeve 101 to fit better against the piston rod 3, reducing gaps and thus enhancing the sealing effect. Multiple mounting ring grooves 1014 can accommodate multiple elastic elements 4, providing a more uniform and stable elastic force distribution, ensuring that different positions of the sealing sleeve 101 can make close contact with the mating parts, effectively preventing leakage.

[0080] During long-term use, the sealing sleeve 101 may experience dimensional changes or a decrease in sealing performance due to factors such as wear and thermal deformation. The elastic element 4 can compensate for these changes through its own deformation, maintaining good contact between the sealing sleeve 101 and the mating parts. The elastic elements 4 in the multiple mounting ring grooves 1014 can compensate at different locations, improving the reliability and service life of the sealing sleeve 101.

[0081] In addition, the design of the mounting ring groove 1014 facilitates the installation of the elastic element 4. For example, during installation, the elastic element 4 can be accurately fitted into the designated position, improving installation efficiency.

[0082] Furthermore, at least a portion of the sealing lip has a mounting ring groove 1014 on its outer side; for example, at least one of the first sealing lip 1011, the second sealing lip 1012, and the third sealing lip 1013 has a mounting ring groove 1014 on its outer side. Optionally, refer to... Figures 1-3 As shown, the outer sides of the second sealing lip 1012 and the third sealing lip 1013 are provided with corresponding mounting ring grooves 1014.

[0083] In this embodiment, the elastic element 4 in the mounting ring groove 1014 can apply additional pressure to the sealing lip, making the seal between the sealing lip and the piston rod 3 tighter. Furthermore, the elastic element 4 in the mounting ring groove 1014 can compensate for the wear amount through its own elastic deformation after the sealing lip wears, ensuring that the sealing lip always maintains tight contact with the piston rod 3, extending the service life of the sealing lip, and guaranteeing the durability of the sealing performance.

[0084] In some embodiments provided by this utility model, the seal 1 further includes a skeleton 105, which is configured as an annular structure, and at least a portion of the skeleton 105 is disposed inside the flange portion 102.

[0085] In this embodiment, the annular frame 105 can serve as a positioning reference, making it easier to accurately install the seal 1 onto the preset position of the guide 2 when installing the seal 1, ensuring the correct fit between the seal 1 and the guide 2, and improving installation efficiency and accuracy.

[0086] In addition, the skeleton 105 can provide additional support for the seal 1, especially for the flange 102, to prevent it from deforming, twisting or breaking when subjected to pressure or external force, ensuring the overall structural stability of the seal 1 and enabling it to withstand higher pressure and more complex working environments.

[0087] Optionally, the skeleton 105 can be a metal frame, a plastic frame, or a composite material frame. Optionally, the skeleton 105 can be disposed inside the flange portion 102 by a vulcanization process.

[0088] This utility model also provides a guide 2.

[0089] Specifically, the guide 2 is used to fit the seal 1 as described above. For example, the guide 2 has a central hole 201 and a vent 204. The central hole 201 has a first annular groove 202 and a second sliding groove on its wall.

[0090] The end face of the first annular groove 202 near the second annular groove 203 is used to abut against the first sealing ring 103. For example, the end face of the first annular groove 202 near the second annular groove 203 is end face A, and end face A is used to abut against the flared opening of the first sealing ring 103.

[0091] The end face of the second annular groove 203 away from the first annular groove 202 is used to abut against the second sealing ring 104. For example, the end face of the second annular groove 203 away from the first annular groove 202 is end face B, which is used to abut against the flared end of the second sealing ring 104. The second annular groove 203 and the first annular groove 202 are both located on the same side of the flange portion 102 of the sealing member 1, that is, both are located on the side of the flange portion 102 near the inner cavity of the shock absorber.

[0092] One end of the vent 204 is located within the first annular groove 202, and the other end is located on the outer wall of the guide 2, communicating with the oil reservoir of the shock absorber. For example, the vent 204 has a first orifice 2041 and a second orifice 2042. The first orifice 2041 is located on the inner wall of the first annular groove 202 and is positioned on the side of the first sealing ring 103 away from the sealing sleeve 101, or in other words, the first orifice 2041 is located on the outer side of the first sealing ring 103. The second orifice 2042 is located on the outer wall of the guide 2 and communicates with the oil reservoir of the shock absorber.

[0093] In this embodiment, reference is made to Figure 1 and Figure 2 As shown, when the pressure inside the working cylinder of the shock absorber is too high, the gas first drives the second sealing ring 104 to deform in a direction away from the end face B of the second ring groove 203, so that a gap is generated between the second sealing ring 104 and the end face B of the second ring groove 203, thereby allowing the gas to be discharged through the gap between the second sealing ring 104 and the end face B of the second ring groove 203.

[0094] The gas discharged through the second sealing ring 104 further drives the first sealing ring 103 to deform in a direction away from the end face A of the first ring groove 202, so that a gap is created between the first sealing ring 103 and the end face A of the first ring groove 202, so that the gas can be discharged through the gap between the first sealing ring 103 and the end face A of the first ring groove 202.

[0095] Finally, the gas discharged through the first sealing ring 103 can enter the exhaust port 204 through the first orifice 2041, and then be discharged to the oil storage cylinder through the second orifice 2042 of the exhaust port 204.

[0096] Conversely, since the end of the first sealing ring 103 that abuts against the end face A is flared, the gas from the oil reservoir enters the first ring groove 202 through the exhaust hole 204 and acts on the outside of the first sealing ring 103, which can press the first sealing ring 103 against the end face A, thereby preventing the gas from passing through the gap between the first sealing ring 103 and the end face A.

[0097] Similarly, the end of the second sealing ring 104 that abuts against the end face B is flared. Therefore, even if gas enters through the first sealing ring 103, the gas acts on the outside of the second sealing ring 104, which can press the second sealing ring 104 tightly against the end face B, thereby preventing the gas from entering the inner cavity of the shock absorber through the gap between the second sealing ring 104 and the end face B.

[0098] With this configuration, the first annular groove 202 and the second annular groove 203 can form a one-way sealing effect with the first sealing ring 103 and the second sealing ring 104 respectively. When either the first sealing ring 103 or the second sealing ring 104 fails to seal due to wear or impurities, the other can serve as a backup to prevent gas in the oil reservoir from entering the working cylinder, thereby improving the reliability, service life and maintenance cycle of the seal 1.

[0099] In addition, by forming a one-way seal with the first sealing ring 103 and the second sealing ring 104 respectively with the first ring groove 202 and the second ring groove 203, the sealing effect between the seal 1 and the guide 2 can be improved. For example, it can prevent external air or impurities from entering the working cylinder through the gap between the seal 1 and the guide 2 along the axial direction of the center hole of the guide 2.

[0100] In some embodiments provided by this utility model, a third annular groove 205 is also provided on the wall of the central hole 201. The third annular groove 205 is located on the side of the first annular groove 202 away from the second annular groove 203, and the third annular groove 205 is used to accommodate the flange portion 102.

[0101] In this embodiment, the third annular groove 205 provides an installation reference for the flange portion 102, which can ensure that the seal 1 is accurately installed in the center hole 201 of the guide 2, ensuring the relative positional accuracy between the seal 1 and the guide 2, so that each sealing ring of the seal 1 can accurately cooperate with the corresponding part on the guide 2, such as the first sealing ring 103 abutting with the first annular groove 202 and the second sealing ring 104 abutting with the second annular groove 203, thereby improving the sealing performance.

[0102] In addition, the positioning and fixing of the flange portion 102 by the third annular groove 205 enables the sealing lip of the seal 1 to better fit with components such as the piston rod 3, reducing the sealing gap caused by inaccurate installation or shaking of the seal 1, further improving the sealing performance, and effectively preventing leakage of oil and other media in the shock absorber.

[0103] Furthermore, the third annular groove 205 penetrates the end face of the guide 2 away from the inner cavity of the damper. This facilitates the installation of the flange portion 102 within the third annular groove 205.

[0104] refer to Figure 4 As shown, in some embodiments provided by this utility model, a first protrusion 206 is provided on the end face of the first annular groove 202 near the second annular groove 203. The first protrusion 206 is provided on the side of the first sealing ring 103 near the sealing sleeve 101 and limits the first sealing ring 103. It can be understood that the first protrusion 206 is an annular structure.

[0105] In this embodiment, the first protrusion 206 can prevent the first sealing ring 103 from being excessively compressed and deformed when subjected to external force. For example, the first protrusion 206 can prevent the flared end of the first sealing ring 103 from moving and compressing excessively toward the sealing sleeve 101, avoiding damage to the sealing ring due to excessive deformation, helping to maintain the elasticity and sealing performance of the first sealing ring 103, and extending its service life.

[0106] Further, refer to Figure 4 As shown, the first protrusion 206 is provided with a limiting surface C. It can be understood that the limiting surface C is a conical surface. One end of the limiting surface C abuts against the end face of the first annular groove 202 near the second annular groove 203, and the other end is inclined towards the sealing sleeve 101. The limiting surface C is in contact with the inner wall of the first sealing ring 103.

[0107] In this embodiment, the inclined limiting surface C has a large contact area with the first sealing ring 103, which avoids the pressure from being concentrated in a local area of ​​the sealing ring and makes the overall force on the sealing ring more balanced.

[0108] In addition, the inclined design of the limiting surface C can better conform to the shape of the sealing ring and fit with the sealing ring in an inclined manner, which makes the fit between the limiting surface and the sealing ring better, and the contact area between the limiting surface C and the sealing ring is larger, making the fit tighter and more complete, thereby improving the sealing performance.

[0109] In some embodiments of this utility model, a second protrusion 207 is provided on the end face of the second annular groove 203 away from the first annular groove 202. The second protrusion 207 is provided on the side of the second sealing ring 104 near the sealing sleeve 101 and limits the second sealing ring 104. It can be understood that the second protrusion 207 is an annular structure.

[0110] In this embodiment, the second protrusion 207 can prevent the second sealing ring 104 from being excessively compressed and deformed when subjected to external force. For example, the second protrusion 207 can prevent the flared end of the second sealing ring 104 from moving and compressing excessively toward the sealing sleeve 101, avoiding damage to the sealing ring due to excessive deformation, helping to maintain the elasticity and sealing performance of the second sealing ring 104, and extending its service life.

[0111] Further, refer to Figure 4 As shown, the second protrusion 207 is provided with a limiting surface D. It can be understood that the limiting surface D is a conical surface. One end of the limiting surface D abuts against the end face of the second annular groove 203 away from the first annular groove 202, and the other end is inclined towards the sealing sleeve 101. The limiting surface D is in contact with the inner wall of the second sealing ring 104.

[0112] In this embodiment, the inclined limiting surface D has a large contact area with the second sealing ring 104, which can prevent pressure from concentrating in a local area of ​​the sealing ring and make the overall force on the sealing ring more balanced.

[0113] In addition, the inclined design of the limiting surface D can better conform to the shape of the sealing ring and fit with the sealing ring in an inclined manner, which makes the fit between the limiting surface D and the sealing ring better, and the contact area between the limiting surface D and the sealing ring larger, making the fit tighter and more complete, thereby improving the sealing performance.

[0114] This utility model embodiment also provides a vibration damper.

[0115] Specifically, the shock absorber includes the seal 1 as described above or the guide 2 as described above.

[0116] It should be noted that the shock absorber includes the seal 1 and the guide 2, and thus also includes the corresponding technical effects, so it will not be elaborated further.

[0117] This utility model also provides a vehicle in its embodiments.

[0118] Specifically, the vehicle includes the seal 1 as described above, the guide 2 as described above, or the shock absorber as described above.

[0119] It should be noted that the vehicle includes seal 1, guide 2 or shock absorber, and thus includes the corresponding technical effects, so they will not be described in detail here.

[0120] Furthermore, the vehicles described in this application include, but are not limited to, vehicles and aircraft. Vehicles include, but are not limited to, pure electric vehicles, hybrid vehicles, and gasoline-powered vehicles.

[0121] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A sealing element, characterized in that, For the guide (2), the guide (2) has a first annular groove (202) and a second annular groove (203) arranged axially on the wall of the central hole (201), and the seal (1) includes: A sealing sleeve (101) is provided at least partially in the central hole (201); The flange (102) is arranged around the outside of the sealing sleeve (101) and is used to connect with the guide (2); The first sealing ring (103) is sleeved on the outside of the sealing sleeve (101). One end of the first sealing ring (103) is connected to the flange (102), and the other end is flared in a direction away from the flange (102) and is used to abut against the end face of the first ring groove (202) near the second ring groove (203). The second sealing ring (104) is located on the same side of the flange portion (102) as the first sealing ring (103) and is sleeved on the outside of the sealing sleeve (101). One end of the second sealing ring (104) is connected to the sealing sleeve (101), and the other end forms a flared opening in the direction away from the flange portion (102) and is used to abut against the end face of the second ring groove (203) away from the first ring groove (202).

2. The seal according to claim 1, characterized in that, The first sealing ring (103) includes an annular seat (1031) and a first conical ring (1032). Along the first sealing ring (103) from one end near the flange (102) to the other end away from the flange (102), the wall thickness of the annular seat (1031) gradually decreases. The annular seat (1031) is connected to the flange (102). The constricted end of the first conical ring (1032) is connected to the annular seat (1031). The flared end of the first conical ring (1032) is used to abut against the first annular groove (202). And / or, the second sealing ring (104) includes a second conical ring, the constricted end of which is connected to the sealing sleeve (101), and the flared end of which is used to abut against the second ring groove (203).

3. The seal according to claim 1 or 2, characterized in that, The inner wall of the sealing sleeve (101) is provided with at least two axially distributed recesses (1015) so that the sealing sleeve (101) forms at least three axially arranged sealing lips.

4. The seal according to claim 1 or 2, characterized in that, The outer wall of the sealing sleeve (101) is provided with an installation ring groove (1014) for fitting the elastic element (4). The number of the installation ring grooves (1014) is at least two, and the at least two installation ring grooves (1014) are arranged along the axial direction of the sealing sleeve (101).

5. The seal according to claim 1 or 2, characterized in that, The seal (1) further includes a skeleton (105), which is configured as an annular structure, and at least a portion of the skeleton (105) is disposed inside the flange (102).

6. A guide, characterized in that, For adapting to the seal (1) as described in any one of claims 1-5, the guide (2) has: A central hole (201) is provided with a first annular groove (202) and a second annular groove (203) distributed along the axial direction on the hole wall. The end face of the first annular groove (202) near the second annular groove (203) is used to abut against the first sealing ring (103), and the end face of the second annular groove (203) away from the first annular groove (202) is used to abut against the second sealing ring (104). The exhaust port (204) has one end located in the first annular groove (202) and the other end located on the outer wall of the guide (2).

7. The guide according to claim 6, characterized in that, The central hole (201) is further provided with a third annular groove (205) on its wall. The third annular groove (205) is located on the side of the first annular groove (202) away from the second annular groove (203). The third annular groove (205) is used to accommodate the flange portion (102).

8. The guide according to claim 6 or 7, characterized in that, The first annular groove (202) has a first protrusion (206) on the end face near the second annular groove (203). The first protrusion (206) is provided on the side of the first sealing ring (103) near the sealing sleeve (101) and limits the first sealing ring (103). And / or, the second annular groove (203) is provided with a second protrusion (207) on the end face away from the first annular groove (202), the second protrusion (207) is provided on the side of the second sealing ring (104) near the sealing sleeve (101) and limits the second sealing ring (104).

9. A vibration damper, characterized in that, It includes the seal (1) as described in any one of claims 1-5, or the guide (2) as described in any one of claims 6-8.

10. A vehicle, characterized in that, It includes the seal (1) as described in any one of claims 1-5, the guide (2) as described in any one of claims 6-8, or the damper as described in claim 9.

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