Guiding assembly, shock absorber and vehicle

Abstract

The application discloses a guide assembly, a shock absorber and a vehicle. The guide assembly is applied to the shock absorber, the shock absorber has a recovery cavity and a compression cavity, the guide assembly has a one-way channel, the one-way channel is connected with the recovery cavity and the compression cavity, and the one-way channel is one-way conducted to allow medium in the recovery cavity to flow to the compression cavity through the one-way channel. According to the guide assembly, the one-way channel is one-way conducted to allow high-temperature medium in the recovery cavity to flow to the compression cavity through the one-way channel, so that damage and failure of the guide assembly caused by bearing too much heat are prevented, and normal operation of the shock absorber is ensured.

Description

Technical Field

[0001] This application relates to the field of shock absorber technology, and more specifically, to a guide assembly, a shock absorber, and a vehicle. Background Technology

[0002] In related technologies, guide components are used in shock absorbers, but the piston rod in the shock absorber generates a lot of heat during its movement, which causes the medium in the recovery chamber to become too hot, resulting in damage to the guide components due to overheating. Utility Model Content

[0003] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, this application proposes a guide assembly that helps reduce the heat borne by the guide assembly.

[0004] This application also proposes a vibration damper having the aforementioned guiding components.

[0005] This application also proposes a vehicle having the aforementioned shock absorber.

[0006] According to a first aspect of this application, a guide assembly is applied to a vibration damper having a recovery chamber and a compression chamber. The guide assembly has a one-way channel connecting the recovery chamber and the compression chamber, and the one-way channel is unidirectionally open to allow the medium in the recovery chamber to flow through the one-way channel to the compression chamber.

[0007] According to the first aspect of the present application, the guide component allows the high-temperature medium in the recovery chamber to flow to the compression chamber through a one-way channel, thereby preventing the guide component from being damaged or failing due to excessive heat and ensuring the normal operation of the shock absorber.

[0008] According to some embodiments of this application, the one-way channel includes a first channel segment, a second channel segment, and a one-way valve. The first channel segment is connected to the recovery chamber, the second channel segment is connected to the first channel segment, the second channel segment is connected to the compression chamber, and the one-way valve is disposed in the second channel segment, allowing the medium in the recovery chamber to flow to the compression chamber through the one-way valve.

[0009] According to some embodiments of this application, the first channel segment includes a channel body segment and a throttling segment. The channel body segment is connected to the recovery cavity, and the throttling segment is connected to the end of the channel body segment away from the recovery cavity. The medium flow area of ​​the throttling segment is smaller than the medium flow area of ​​the channel body segment.

[0010] According to some embodiments of this application, the medium flow area of ​​the throttling section is 0.1 mm. 2 ~3mm 2; and / or, the length of the throttling section is 0.3mm to 4mm.

[0011] The vibration damper according to a second aspect embodiment of this application includes the above-described guide assembly, inner cylinder and outer cylinder, the recovery cavity is formed inside the inner cylinder, the guide assembly is disposed over one end of the inner cylinder, the outer cylinder is sleeved on the circumferential outer side of the inner cylinder, the compression cavity is formed between the outer cylinder and the inner cylinder, and the outer cylinder is sealed to the guide assembly.

[0012] According to the second aspect of the present application, the guide component of the vibration damper is unidirectionally guided through a one-way channel so that the high-temperature medium in the recovery chamber flows to the compression chamber through the one-way channel, thereby preventing the guide component from being damaged or failing due to excessive heat and ensuring the normal operation of the vibration damper.

[0013] According to some embodiments of this application, the shock absorber further includes a piston and a piston rod. The piston is disposed inside the inner cylinder and slides against the inner wall of the inner cylinder. One end of the piston rod is located inside the inner cylinder and connected to the piston, while the other end of the piston rod is located outside the inner cylinder. The piston rod passes through the guide assembly.

[0014] According to some embodiments of this application, the guide assembly and the piston rod together enclose the oil seal chamber, the oil seal chamber is adapted to communicate with both the first channel segment and the second channel segment, and the one-way valve is disposed at one end of the second channel segment near the compression chamber.

[0015] According to some embodiments of this application, the guiding assembly includes a guide and an oil seal, the one-way channel is disposed on the guide, the piston rod passes through the guide and the oil seal, and an oil seal chamber is formed between the piston rod, the oil seal and the guide. The oil seal chamber is adapted to communicate with both the first channel segment and the second channel segment, and the one-way valve is disposed at one end of the second channel segment near the compression chamber.

[0016] According to some embodiments of this application, the guide assembly further includes a sealing structure, the guide has a mounting hole, the piston rod passes through the mounting hole, and the sealing structure is disposed between the mounting hole and the piston rod.

[0017] According to some embodiments of this application, the sealing structure includes at least a first sealing element and a second sealing element. The first sealing element is circumferentially disposed on the outer surface of the piston rod, and the inner circumference of the first sealing element abuts against the piston rod. The second sealing element is circumferentially disposed between the outer circumference of the first sealing element and the wall of the mounting hole, and the second sealing element abuts against the outer circumference of the first sealing element and the wall of the mounting hole.

[0018] According to some embodiments of this application, the heat resistance of the first seal is higher than that of the second seal.

[0019] According to some embodiments of this application, the elastic modulus of the second seal is lower than that of the first seal.

[0020] According to some embodiments of this application, the guide assembly further includes a clamping member, which is fixedly installed on the guide and abuts against the sealing structure in the axial direction of the mounting hole, so that the sealing structure is axially fixed between the mounting hole and the piston rod.

[0021] According to some embodiments of this application, the guide has a snap ring hole with a diameter larger than that of the mounting hole. The guide assembly further includes a snap ring partially disposed within the snap ring hole. In the axial direction of the mounting hole, the snap ring abuts against the sealing structure to axially fix the sealing structure between the mounting hole and the piston rod.

[0022] According to some embodiments of this application, the guide also has a snap ring hole, the diameter of which is larger than the diameter of the mounting hole. The guide assembly further includes a pressure ring and a snap ring. In the axial direction of the mounting hole, the pressure ring abuts against the sealing structure. The snap ring is partially disposed in the snap ring hole and abuts against the side of the pressure ring opposite to the sealing structure, so that the sealing structure is axially fixed between the mounting hole and the piston rod.

[0023] According to some embodiments of this application, the guide assembly further includes a bushing, and the guide also has a bushing hole connected to the mounting hole. The bushing is mounted in the bushing hole and adapted to contact and engage with the piston rod. In the axial direction of the mounting hole, one end of the sealing structure abuts against the guide and / or the bushing.

[0024] According to some embodiments of this application, the oil seal includes an oil seal body, a fastener, a second lip, and at least one first lip. The first lip is connected to the oil seal body and is interference-fitted with the piston rod. The second lip is connected to the oil seal body and abuts against the outer cylinder. The fastener is sleeved on the outer peripheral surface of the first lip to tightly press the first lip against the piston rod.

[0025] The vehicle according to the third aspect of this application includes the shock absorber described above.

[0026] According to the third aspect of the vehicle, the guide assembly of the shock absorber is unidirectionally guided through a one-way channel so that the high-temperature medium in the recovery chamber flows to the compression chamber through the one-way channel, thereby preventing the guide assembly from being damaged or failing due to excessive heat and ensuring the normal operation of the shock absorber.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a vibration damper according to an embodiment of this application; Figure 2 It is based on Figure 1 The cross-sectional view of AA shown; Figure 3 It is based on Figure 2 A magnified view of a portion at point B shown; Figure 4 This is a schematic diagram of a guide according to an embodiment of this application; Figure 5 It is based on Figure 4 The cross-sectional view of CC shown; Figure 6 This is a perspective view of the first sealing element according to an embodiment of this application; Figure 7 This is a cross-sectional view of the first seal according to an embodiment of this application; Figure 8 This is a perspective view of the second sealing element according to an embodiment of this application; Figure 9 This is a perspective view of a retaining ring according to an embodiment of this application; Figure 10 This is a perspective view of the pressure ring according to an embodiment of this application; Figure 11 This is a perspective view of a one-way valve according to an embodiment of this application; Figure 12 This is a perspective view of an oil seal according to an embodiment of this application; Figure 13 This is a cross-sectional view of an oil seal according to an embodiment of this application; Figure 14 This is a schematic diagram of a vehicle according to an embodiment of this application.

[0029] Figure label: Vehicle 1000, shock absorber 100, guide assembly 10, one-way channel 1, one-way valve 11, first channel section 12, channel body section 121, throttling section 122, second channel section 13, guide 2, mounting hole 21, first mounting hole 211, second mounting hole 212, snap ring hole 22, bushing hole 23, oil seal hole 24, first mating surface 25, oil seal 3, oil seal body 31, first lip 32, second lip 33, fastener 34, first part 35, second part 36, recovery cavity 41, compression cavity 42, oil seal chamber 43, sealing structure 5, first seal 51, second seal 52, first sealing hole 53, pressure ring 61, snap ring 62, bushing 63, housing 7, inner cylinder 71, outer cylinder 72, piston rod 8. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] The following is combined Figures 1-14 The present application describes in detail a guide assembly 10, a shock absorber 100 having the guide assembly 10, and a vehicle 1000 having the shock absorber 100, according to embodiments of the present application.

[0033] Reference Figure 1 , Figure 2 As shown, the guide assembly 10 according to the first aspect embodiment of this application is applied to a vibration damper 100, the vibration damper 100 having a recovery chamber 41 and a compression chamber 42, the guide assembly 10 having a one-way channel 1, the one-way channel 1 connecting the recovery chamber 41 and the compression chamber 42, the one-way channel 1 being unidirectionally open to allow the medium in the recovery chamber 41 to flow through the one-way channel 1 to the compression chamber 42, for example Figure 3 F1 indicates the direction of medium flow.

[0034] In some embodiments, the medium in the compression chamber 42 cannot flow to the recovery chamber 41 through the one-way channel 1.

[0035] Specifically, during the operation of the shock absorber 100, the heat of the medium in the recovery chamber 41 continuously increases. The one-way channel 1 can conduct in one direction, allowing the medium in the recovery chamber 41 to flow into the compression chamber 42. This causes the high-temperature medium near the guide assembly 10 in the recovery chamber 41 to flow into the compression chamber 42 and mix with the low-temperature medium in the compression chamber 42, neutralizing the heat of this medium. This prevents the guide assembly 10 from being damaged or failing due to excessive heat, ensuring the normal operation of the shock absorber 100.

[0036] Meanwhile, the guide assembly 10 also serves to relieve pressure. When the piston rod 8 in the shock absorber 100 moves, it can cause a change in the volume of the recovery chamber 41. When the volume of the recovery chamber 41 shrinks, the pressure of the medium in the recovery chamber 41 increases continuously and impacts the guide assembly 10. The one-way channel 1 allows the medium in the recovery chamber 41 to flow unidirectionally to the compression chamber 42, thereby reducing the pressure of the medium, reducing the impact of the medium on the guide assembly 10, and better ensuring the normal operation of the shock absorber 100.

[0037] When the shock absorber 100 is working, repeated oscillations can cause bubbles to form in the recovery chamber 41. The bubbles in the recovery chamber 41 can be discharged into the compression chamber 42 through the one-way channel 1, which reduces the gas content in the medium in the recovery chamber 41 and avoids excessive gas interference that could cause the shock absorber 100 to malfunction.

[0038] Alternatively, the medium can be a liquid such as water or oil.

[0039] In related technologies, guide components are used in shock absorbers, but the piston rod in the shock absorber generates a lot of heat during its movement, which causes the medium in the recovery chamber to become too hot, resulting in damage to the guide components due to overheating.

[0040] According to the first aspect of the present application, the guide component 10 is unidirectionally guided through the one-way channel 1 so that the high-temperature medium in the recovery chamber 41 flows to the compression chamber 42 through the one-way channel 1, thereby preventing the guide component 10 from being damaged or failing due to excessive heat and ensuring the normal operation of the shock absorber 100.

[0041] In some embodiments of this application, see Figure 3 As shown, a one-way valve 11 is installed in the one-way channel 1, allowing the medium in the recovery chamber 41 to flow into the compression chamber 42 through the one-way valve 11. Specifically, the one-way valve 11 installed in the one-way channel 1 can completely block the reverse flow of the medium from the compression chamber 42 into the recovery chamber 41, ensuring that the guide assembly 10 can maintain its one-way flow characteristics even under complex working conditions, thus providing a reliable guarantee for the damping control and heat dissipation of the vibration damper 100.

[0042] In some embodiments, in the direction from the recovery chamber 41 to the compression chamber 42, a one-way valve 11 is disposed at one end of the one-way channel 1 near the compression chamber 42.

[0043] In some embodiments, the components of the one-way valve 11 may include rubber components or PTFE (polytetrafluoroethylene) components, etc. For example, the one-way valve 11 is a rubber ring one-way valve, which includes a rubber ring. Rubber ring one-way valves are conventional technology in the art and will not be described in detail here.

[0044] In some embodiments of this application, see Figure 3 As shown, the one-way channel 1 includes a first channel section 12 and a second channel section 13. The first channel section 12 is connected to the recovery chamber 41. In the direction from the recovery chamber 41 to the compression chamber 42, the second channel section 13 is connected to the first channel section 12 and the second channel section 13 is connected to the compression chamber 42. The one-way valve 11 is disposed in the second channel section 13.

[0045] Specifically, the segmented design creates a more suitable working environment for the check valve 11 by dividing the work into the first channel segment 12 and the second channel segment 13, thus avoiding interference with the function of the check valve 11 due to the unstable flow of the medium. The first channel segment 12 is directly connected to the restoration chamber 41. By designing the inner diameter and length of the first channel segment 12, the turbulent medium flow in the restoration chamber 41 (such as eddies caused by the movement of the piston rod 8 and local high pressure areas) can be straightened into a stable linear flow.

[0046] For example, the first channel section 12 can adopt a gradually narrowing inner diameter to gradually guide the medium to converge into the second channel section 13, avoiding the medium from directly entering the check valve 11 in an impact manner, reducing the valve core of the check valve 11 from the flutter caused by instantaneous flow rate fluctuations (the valve core repeatedly opens and closes in small amplitudes), ensuring the stability of the opening and closing action of the check valve 11, and improving the reliability of unidirectional conduction.

[0047] In some embodiments of this application, the first channel segment 12 includes a channel body segment 121 and a throttling segment 122. The channel body segment 121 is connected to the restoration cavity 41, and the throttling segment 122 is connected to the end of the channel body segment 121 away from the restoration cavity 41. The medium flow area of ​​the throttling segment 122 is smaller than the medium flow area of ​​the channel body segment 121.

[0048] Specifically, the throttling section 122 and / or the decreasing flow area design of the first channel section 12 can transform the turbulent medium flow in the restoration chamber 41 into a stable and controllable flow, creating a suitable working environment for the check valve 11 and preventing the valve core of the check valve 11 from failing due to flow fluctuations. Simultaneously, when the medium pressure suddenly increases due to the reduction in volume of the restoration chamber 41, if this directly acts on the check valve 11 (including the valve core and seat), it will cause the valve core to be pushed open at high speed, resulting in a violent collision with the valve seat. Over time, this will cause wear and sealing failure of the valve core and seat. The throttling section 122 (or the decreasing flow area design) can weaken the high-pressure pulse peak through flow resistance—after the high-pressure medium passes through the first channel section 12, part of the pressure is converted into flow resistance, and the pressure reaching the check valve 11 has dropped to a stable relief pressure, preventing the valve core from being subjected to hard impact and extending the service life of the check valve 11.

[0049] It should be understood that this application does not limit the position and number of the channel body segment 121 and the throttling segment 122. In the first channel segment 12, the throttling segment 122 may be located on the side of the channel body segment 121 closer to the restoration cavity 41, or it may be located on the side of the channel body segment 121 closer to the compression cavity 42, or it may be located between any two channel body segments 121, or the channel body segment 121 may be located between any two throttling segments 122. This application does not impose specific limitations here.

[0050] For example, Figure 3 As shown, there is one throttling section 122 and one channel body section 121. The throttling section 122 is located on the side of the channel body section 121 near the compression chamber 42.

[0051] It should be understood that the "medium flow area in the throttling section 122" mentioned above can be defined as the smallest medium flow area in the throttling section 122, or it can be defined as the medium flow area at the position where the cross-section of the throttling section 122 is smallest in the flow direction from the restoration chamber 41 to the compression chamber 42.

[0052] Similarly, the “medium flow area of ​​channel body section 121” can be defined as the smallest medium flow area in channel body section 121, or it can be defined as the medium flow area at the position with the smallest cross-section of channel body section 121 in the flow direction from restoration chamber 41 to compression chamber 42.

[0053] Therefore, the statement "the medium flow area of ​​the throttling section 122 is less than the medium flow area of ​​the channel body section 121" can be understood as the minimum flow area of ​​the medium in the throttling section 122 being less than the minimum flow area of ​​the medium in the channel body section 121. That is, there exists at least one throttling section 122 where the medium flow area is less than the medium flow area at any location in the channel body section 121.

[0054] For example Figure 3As shown, both the channel body section 121 and the throttling section 122 are cylindrical channels, and the medium flow area of ​​the channel body section 121 is larger than that of the throttling section 122.

[0055] For example, the channel body section 121 is a frustum-shaped channel, and the throttling section 122 is a cylindrical channel. The medium flow area at the small diameter end of the channel body section 121 is larger than the medium flow area of ​​the throttling section 122.

[0056] For example, the channel body section 121 is a cylindrical channel, and the throttling section 122 is a conical channel. The medium flow area of ​​the channel body section 121 is larger than the medium flow area of ​​the small diameter end of the throttling section 122.

[0057] For example, the channel body section 121 is a frustum-shaped channel, and the throttling section 122 is a conical channel. The medium flow area at the small diameter end of the channel body section 121 is greater than the medium flow area at the small diameter end of the throttling section 122.

[0058] It should be understood that the channel form of the throttling section 122 and the channel body section 121 can be various, such as a regular frustum, cylinder, or cone, or an irregular shape, which will not be elaborated here.

[0059] In some embodiments of this application, the medium flow area D of the throttling section 122 is 0.1 mm. 2 ~3mm 2 ; and / or, the length L of the throttling section 122 is 0.3mm to 4mm.

[0060] Specifically, by limiting the medium flow area D of the throttling section 122, it can prevent insufficient flow caused by an excessively small medium flow area D, which would allow the medium to flow into the compression chamber 42 quickly and fail to achieve the core protection function. It can also prevent the flow from running out of control caused by an excessively large medium flow area D, which would allow a large amount of medium in the recovery chamber 41 to be conducted into the compression chamber 42 and damage the damping stability of the shock absorber 100.

[0061] By limiting the length L of the throttling section 122, the unstable throttling effect caused by an excessively short length L can be prevented. The medium passes through the throttling section 122 in a short time, and the flow velocity is easily affected by the instantaneous pressure fluctuations in the recovery chamber 41, making it impossible to form a stable medium flow, which in turn causes the one-way valve 11 to chatter. It can also prevent the damping superposition caused by an excessively long length L of the throttling section 122. If the flow path of the medium in the throttling section 122 is too long, the frictional resistance and pressure loss along the way will increase. Even if the flow area meets the standard, the actual flow rate will decrease, which may lead to poor conduction and affect heat dissipation and pressure relief efficiency.

[0062] In some embodiments, the medium flow area D of the throttling section 122 is 0.1 mm. 2 ~3mm 2 .

[0063] In some embodiments, the length L of the throttling section 122 is 0.3 mm to 4 mm.

[0064] In some embodiments, see Figure 3 As shown, the medium flow area D of the throttling section 122 is 0.1 mm. 2 ~3mm 2 Furthermore, the length L of the throttling section 122 is 0.3mm~4mm.

[0065] Optionally, the medium flow area D of the throttling section 122 can be 0.1 mm. 2 0.2mm 2 0.5mm 2 1mm 2 1.5mm 2 2mm 2 2.5mm 2 3mm 2 Or other 0.1mm 2 ~3mm 2 The area. For example, the medium flow area D of the throttling section 122 can be 0.2 mm. 2 .

[0066] Optionally, the length L of the throttling section 122 can be 0.3mm, 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, or other lengths of 0.3mm to 4mm. For example, the length L of the throttling section 122 can be 0.5mm.

[0067] See Figure 1 , Figure 2 As shown, the vibration damper 100 according to the second aspect embodiment of this application includes the above-described guide assembly 10 and housing 7. The guide assembly 10 is disposed on the housing 7, and the recovery cavity 41 and compression cavity 42 are formed inside the housing 7.

[0068] According to the second aspect of the present application, the guide component 10 of the vibration damper 100 is unidirectionally guided through the one-way channel 1 so that the high-temperature medium in the recovery chamber 41 flows to the compression chamber 42 through the one-way channel 1, thereby preventing the guide component 10 from being damaged or failing due to excessive heat, and ensuring the normal operation of the vibration damper 100.

[0069] In some embodiments of this application, see Figures 1-3As shown, the shell 7 includes an inner cylinder 71 and an outer cylinder 72. A recovery cavity 41 is formed inside the inner cylinder 71. A guide assembly 10 is installed at one end of the inner cylinder 71. The outer cylinder 72 is fitted around the circumferential outer side of the inner cylinder 71. A compression cavity 42 is formed between the outer cylinder 72 and the inner cylinder 71. The outer cylinder 72 and the guide assembly 10 are sealed together. Specifically, the inner cylinder 71 and the outer cylinder 72 physically separate the recovery cavity 41 and the compression cavity 42, preventing them from interfering with each other and ensuring the stability of the medium flow within the recovery cavity 41. Furthermore, the double-layer shell 7 structure with the inner cylinder 71 and the outer cylinder 72 significantly improves the pressure resistance of the shell 7 and reduces the risk of deformation and rupture due to high pressure.

[0070] In some embodiments of this application, see Figures 1-3 As shown, the shock absorber 100 also includes a piston (not shown) and a piston rod 8. The piston is disposed inside the inner cylinder 71 and slides against the inner wall of the inner cylinder 71. One end of the piston rod 8 is located inside the inner cylinder 71 and connected to the piston, while the other end of the piston rod 8 is located outside the inner cylinder 71. The piston rod 8 passes through the guide assembly 10. Specifically, the piston rod 8 passes through the guide assembly 10, and the guide assembly 10 is in contact with the outer periphery of the piston rod 8 (or in contact with it through the bushing 63), forming a radial constraint. Even if the shock absorber 100 is subjected to lateral impact (such as when the vehicle 1000 is cornering or the shock absorber 100 vibrates and deviates), the guide assembly 10 can limit the radial runout of the piston rod 8, ensuring that the piston rod 8 always reciprocates along the axial direction of the inner cylinder 71.

[0071] In some embodiments, the guide assembly 10 and the piston rod 8 together enclose an oil seal chamber 43, which is adapted to communicate with both the first channel section 12 and the second channel section 13. A one-way valve 11 is disposed at one end of the second channel section 13 near the compression chamber 42. Specifically, the medium in the oil seal chamber 43 can wet the oil seal 3, providing a lubricating effect.

[0072] In some embodiments of this application, see Figures 2-5 As shown, the guide assembly 10 includes a guide 2 and an oil seal 3. A one-way channel 1 is disposed on the guide 2. A piston rod 8 passes through the guide 2 and the oil seal 3. An oil seal chamber 43 is formed between the piston rod 8, the oil seal 3 and the guide 2. The oil seal chamber 43 is adapted to be connected to both the first channel section 12 and the second channel section 13. A one-way valve 11 is disposed at one end of the second channel section 13 near the compression chamber 42.

[0073] Specifically, the main function of the oil seal 3 is to seal the gap between the piston rod 8 and the guide 2, preventing the medium in the recovery chamber 41 and the oil seal chamber 43 from leaking to the outside of the damper 100. Simultaneously, the oil seal 3 can prevent external dust and moisture from entering. The medium in the recovery chamber 41 can flow to the oil seal chamber 43 through the first channel section 12, wetting the oil seal 3 and providing lubrication, reducing friction between the oil seal 3 and the piston rod 8, and lowering the wear rate of the oil seal 3. At the same time, the medium in the oil seal chamber 43 can also carry away the heat generated by the oil seal 3 during operation (such as the heating of the lip of the oil seal 3 caused by the reciprocating motion of the piston rod 8), extending the service life of the oil seal 3.

[0074] The guide 2 can be used to guide the piston rod 8 in the damper 100, withstand lateral loads and high and low temperature changes, prevent leakage of the damper 100, and prevent the damper 100 from failing.

[0075] In some embodiments, the circumferential outer side of the oil seal 3 at least partially abuts against the guide assembly 10 and / or the outer cylinder 72.

[0076] In some embodiments, the circumferential outer side of the oil seal 3 abuts at least partially against the guide assembly 10.

[0077] In some embodiments, the circumferential outer side of the oil seal 3 at least partially abuts against the outer cylinder 72.

[0078] In some embodiments, the outer circumferential side of the oil seal 3 may abut against the guide assembly 10 and the outer cylinder 72, respectively.

[0079] In some embodiments, the guide 2 has a first mating surface 25, and the one-way valve 11 is fixed to the first mating surface 25.

[0080] In some embodiments, the recovery chamber 41 and the oil-sealed chamber 43 are connected via a first channel section 12, and the compression chamber 42 and the oil-sealed chamber 43 are connected via a second channel section 13. Specifically, the medium in the recovery chamber 41 can flow to the oil-sealed chamber 43 after passing through the first channel section 12, or flow to the compression chamber 42 through the second channel section 13. The medium in the oil-sealed chamber 43 can flow to the compression chamber 42 through the second channel section 13.

[0081] Alternatively, the material of the oil seal 3 can be nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), and fluororubber (Viton), etc.

[0082] In some embodiments of this application, see Figure 2 , Figure 3 , Figures 5-9 As shown, the guide assembly 10 also includes a sealing structure 5. The guide 2 has a mounting hole 21, the piston rod 8 passes through the mounting hole 21, and the sealing structure 5 is disposed between the mounting hole 21 and the piston rod 8.

[0083] Specifically, the sealing structure 5 is disposed between the outer wall of the piston rod 8 and the wall of the mounting hole 21, so that the restoration chamber 41 and the oil seal chamber 43 are isolated at the mounting hole 21. During the movement of the piston rod 8, the sealing structure 5 can prevent the medium with excessive pressure in the restoration chamber 41 from directly rushing into the oil seal chamber 43, avoiding the medium from impacting the oil seal 3 and protecting the integrity of the oil seal 3.

[0084] During the operation of the shock absorber 100, the oil seal 3 needs lubrication. Since the sealing structure 5 can scrape off the medium attached to the piston rod 8, the medium cannot flow from the recovery chamber 41 to the piston 3 through the mounting hole 21. Therefore, an oil seal channel 43 is set up and connected to the one-way channel 1 so that the medium in the recovery chamber 41 can flow from the one-way channel 1 to the oil seal channel 43 and wet the oil seal 3.

[0085] In some embodiments, the sealing structure 5 has a first sealing hole 53 through which the piston rod 8 passes, and the sealing structure 5 is adapted to abut against the outer periphery of the piston rod 8.

[0086] In some embodiments, see Figure 2 As shown, unidirectional channel 1 can be a single channel.

[0087] In some embodiments not shown in the figures, there may be multiple unidirectional channels 1, which are spaced apart circumferentially along the mounting hole 21. Optionally, there may be two, three, four, five, six or more unidirectional channels 1.

[0088] In some embodiments of this application, see Figure 2 , Figure 3 , Figures 6-9 As shown, the sealing structure 5 includes at least a first sealing element 51 and a second sealing element 52. The first sealing element 51 is circumferentially disposed on the outer surface of the piston rod 8, and the inner circumference of the first sealing element 51 abuts against the piston rod 8. The second sealing element 52 is circumferentially disposed between the outer circumference of the first sealing element 51 and the wall of the mounting hole 21, and the second sealing element 52 abuts against the outer circumference of the first sealing element 51 and the wall of the mounting hole 21.

[0089] Specifically, the first seal 51 and the piston rod 8 form a dynamic seal, while the second seal 52 and the wall of the mounting hole 21 form a static seal. The inner circumference of the first seal 51 directly abuts against the outer circumference of the piston rod 8, directly preventing high-pressure media from leaking along the surface of the piston rod 8 from the restoration chamber 41 and the oil seal chamber 43. The dynamic seal between the first seal 51 and the piston rod 8 can accommodate minor surface errors of the piston rod 8, preventing media from being squeezed out of the sealing surface gap even if there is instantaneous high pressure. The second seal 52 is sandwiched between the outer circumference of the first seal 51 and the wall of the mounting hole 21, forming a seal against the radial gap between the first seal 51 and the mounting hole 21. The second seal 52 can fill the gap between the piston rod 8 and the mounting hole 21 through an interference fit, thereby improving the sealing effect of the sealing structure 5.

[0090] In some embodiments of this application, see Figure 2 , Figure 3 , Figures 6-9 As shown, the heat resistance of the first seal 51 is higher than that of the second seal 52. Specifically, the first seal 51 and the piston rod 8 form a dynamic seal. When the damper 100 is working, the piston rod 8 reciprocates in the axial direction relative to the first seal 51. The piston rod 8 and the first seal 51 generate a large amount of heat due to friction. The high heat resistance of the first seal 51 helps to prevent excessive heat from causing deformation or failure of the first seal 51, thus improving the sealing effect of the first seal 51.

[0091] In some embodiments of this application, see Figure 2 , Figure 3 , Figures 6-9 As shown, the elastic modulus of the second seal 52 is lower than that of the first seal 51. Specifically, the second seal 52 and the wall of the mounting hole 21 form a static seal. The second seal 52 is sandwiched between the outer periphery of the first seal 51 and the wall of the mounting hole 21, which can form a seal for the radial gap between the first seal 51 and the mounting hole 21. The lower elastic modulus of the second seal 52 means that the second seal 52 can better fill the gap between the piston rod 8 and the mounting hole 21 through an interference fit, thereby improving the sealing effect of the sealing structure 5.

[0092] In some embodiments, the first seal 51 may be a sealing ring, a sealing ring, etc.

[0093] In some embodiments, the material of the first seal 51 may be PTFE (polytetrafluoroethylene), FKM (fluororubber), FFKM (perfluoroether rubber), etc.

[0094] In some embodiments, the second seal 52 may be a sealing ring.

[0095] In some embodiments, the material of the second seal 52 may be rubber, such as NBR (nitrile butadiene rubber), HNBR (hydrogenated nitrile butadiene rubber), VMQ (silicone rubber), etc.

[0096] For example, the first seal 51 is a PTFE sealing ring, and the second seal 52 is a rubber ring. The first seal 51 and the second seal 52 together form a step seal assembly. The PTFE material has a working temperature of -200 degrees to 200 degrees and excellent lubricity. The step seal assembly can seal the guide piston rod 8, thereby reducing the pressure in the oil seal chamber 43.

[0097] In related technologies, the guide assembly is equipped with a scraper ring and a bushing. Through the clearance fit between the bushing, the scraper ring and the piston rod, the damper can easily transmit the medium pressure to the oil seal chamber during operation. Excessive medium pressure can cause the oil seal to fail.

[0098] According to the guide assembly 10 of this application, by using the first seal 51 and the second seal 52, the gap between the mounting hole 21 and the piston rod 8 is completely sealed, which avoids the medium with excessive pressure from directly impacting the oil seal 3 during the operation of the damper 100, thus ensuring the stability of the oil seal 3.

[0099] In some embodiments, the guide assembly 10 further includes a clamping member, which is fixedly mounted on the guide 2, and the clamping member abuts against the sealing structure 5 in the axial direction of the mounting hole 21, so that the sealing structure 5 is axially fixed between the mounting hole 21 and the piston rod 8.

[0100] In some embodiments not shown in the figures, the guide 2 has a snap ring hole 22, the diameter of which is larger than the diameter of the mounting hole 21. The guide assembly 10 also includes a snap ring 62, which is partially disposed in the snap ring hole 22. In the axial direction of the mounting hole 21, the snap ring 62 abuts against the sealing structure 5 so that the sealing structure 5 is axially fixed between the mounting hole 21 and the piston rod 8.

[0101] In some embodiments of this application, see Figure 5 , Figure 9 , Figure 10 As shown, the guide 2 also has a snap ring hole 22, the diameter of which is larger than that of the mounting hole 21. The guide assembly 10 also includes a pressure ring 61 and a snap ring 62. In the axial direction of the mounting hole 21, the pressure ring 61 abuts against the sealing structure 5. The snap ring 62 is partially disposed in the snap ring hole 22 and abuts against the side of the pressure ring 61 opposite to the sealing structure 5, so that the sealing structure 5 is axially fixed between the mounting hole 21 and the piston rod 8.

[0102] Specifically, the diameter of the retaining ring hole 22 is larger than that of the mounting hole 21, forming an annular step. The retaining ring 62 is embedded in the retaining ring hole 22, with its outer circumference secured radially within the retaining ring hole 22. Its inner circumference abuts against the side of the pressure ring 61 opposite to the sealing structure 5, effectively forming a rigid barrier in the axial direction of the mounting hole 21. This prevents the sealing structure 5 from axially shifting under high pressure or vibration, avoiding seal failure due to displacement. Simultaneously, the pressure ring 61 acts as a force transmission medium. In the axial direction of the mounting hole 21, the pressure ring 61 fully covers the end face of the sealing structure 5, converting the localized force of the retaining ring 62 into a uniform axial preload, ensuring overall force balance in the sealing structure 5 and preventing media leakage due to uneven force distribution.

[0103] In some embodiments of this application, see Figure 2 , Figure 5 As shown, the guide assembly 10 also includes a bushing 63, and the guide 2 also has a bushing hole 23, which is connected to the mounting hole 21. The bushing 63 is installed in the bushing hole 23 and is adapted to contact and cooperate with the piston rod 8. In the axial direction of the mounting hole 21, one end of the sealing structure 5 abuts against the guide 2 and / or the bushing 63.

[0104] Specifically, the design of bushing 63 can effectively reduce the direct friction between piston rod 8 and guide 2, reduce the resistance of reciprocating motion of piston rod 8, make the shock absorber 100 more responsive, effectively avoid wear between piston rod 8 and guide 2, and extend service life.

[0105] In some embodiments, see Figure 5 As shown, the mounting hole 21 includes a first mounting hole 211 and a second mounting hole 212. The sealing structure 5 is disposed in the first mounting hole 211, and the pressure ring 61 is disposed in the second mounting hole 212. The diameter of the first mounting hole 211 is not greater than the diameter of the second mounting hole 212.

[0106] In some embodiments of this application, see Figure 12 , Figure 13 As shown, the oil seal 3 includes an oil seal body 31, at least one first lip 32, a second lip 33, and a fastener 34. The first lip 32 is connected to the oil seal body 31 and is press-fitted with the piston rod 8. The second lip 33 is connected to the oil seal body 31 and abuts against the outer cylinder 72. The fastener 34 is sleeved on the outer circumferential surface of the first lip 32 to tightly press the first lip 32 against the piston rod 8.

[0107] Specifically, the first lip 32 is interference-fitted with the outer periphery of the piston rod 8, so that the first lip 32 is in close contact with the surface of the piston rod 8. Even if there are minor machining errors in the piston rod 8, the first lip 32 can fill the gap through its own deformation, preventing the medium in the recovery chamber 41 from seeping out along the piston surface, and also preventing external impurities from flowing into the recovery chamber 41.

[0108] Fastener 34 is fitted onto the outer circumferential surface of the first lip 32, and the first lip 32 is pressed against the surface of the piston rod 8 by radial tightening force, which further increases the sealing pressure and prevents the medium from leaking out of the damper 100 due to the sealing failure of the first lip 32.

[0109] The abutting fit between the second lip 33 and the outer cylinder 72 creates a static sealing barrier for the connection surface between the oil seal 3 and the outer cylinder 72, which can prevent external impurities from entering the shock absorber 100.

[0110] In some embodiments, the first lip 32 and the piston rod 8 are dynamically sealed.

[0111] In some embodiments, the oil seal 3 includes a first part 35 and a second part 36, wherein the hardness of the first part 35 is greater than that of the second part 36, and the second part 36 at least partially covers the first part 35. A first lip 32 and a second lip 33 are both disposed on the second part 36.

[0112] In some embodiments, the first part 35 is a metal part and the second part 36 is a rubber part. The first part 35 is a metal main frame, and the second part 36 is vulcanized to cooperate with the first part 35 to form an oil seal 3.

[0113] Optionally, the first lip 32 can be one, two, three, four, or more. For example... Figure 13 As shown, there are two first lips 32, one of which is a dustproof rib and the other is a sealing rib. The dustproof rib and the sealing rib are spaced apart in the axial direction of the piston rod 8, with the dustproof rib located above the sealing rib.

[0114] Optionally, fastener 34 can be a fastening spring, clamp, etc. For example, Figure 13 As shown, fastener 34 is a fastening spring.

[0115] In some embodiments, the guide 2 has an oil seal hole 24, and an oil seal 3 is disposed in the oil seal hole 24. It is fixed by riveting with an outer cylinder 72.

[0116] In some embodiments, the piston has a second channel (not shown) and a third channel (not shown). The recovery chamber 41 and the compression chamber 42 are connected through the second channel, and the recovery chamber 41 and the compression chamber 42 are also connected through the third channel. During the operation of the damper 100, during the reciprocating motion of the piston, the medium is suitable to flow between the recovery chamber 41 and the compression chamber 42 through the second channel and / or the third channel.

[0117] In some embodiments, the second channel is unidirectionally open to allow the medium in the compression chamber 42 to flow into the recovery chamber 41, and the third channel is unidirectionally open to allow the medium in the recovery chamber 41 to flow into the compression chamber 42.

[0118] For example, when the piston moves upward, the maximum flow velocity of the medium in the second channel is greater than the maximum flow velocity of the medium in the third channel, and the medium flows from the recovery chamber 41 to the compression chamber 42; when the piston moves downward, the maximum flow velocity of the medium in the third channel is greater than the maximum flow velocity of the medium in the second channel, and the medium flows from the compression chamber 42 to the recovery chamber 41.

[0119] During the upward movement of the piston, some of the medium in the recovery chamber 41 also flows to the compression chamber 42 through the one-way channel 1.

[0120] In some embodiments, the chamber inside the inner cylinder 71 is divided into two by the piston, including a recovery chamber 41 located at the upper part of the piston and an intermediate chamber located at the lower part of the piston. The intermediate chamber is connected to the compression chamber 42, and the medium can flow freely between the intermediate chamber and the compression chamber 42.

[0121] In some embodiments, the chamber within the inner cylinder 71 is divided into two by a piston, including a recovery chamber 41 located at the upper part of the piston and a portion of a compression chamber 42 located at the lower part of the piston. The other portion of the compression chamber 42 is formed between the inner cylinder 71 and the outer cylinder 72.

[0122] In related technologies, oil seals have oil seal check valves, through which the medium in the oil seal chamber flows to the compression chamber. However, this type of oil seal has a complex structure and high manufacturing cost.

[0123] The oil seal 3 of this application simplifies the structure of the oil seal 3 and reduces the manufacturing cost of the oil seal 3 by eliminating the oil seal check valve and setting a check valve 11 separately at one end of the check channel 1.

[0124] The vehicle 1000 according to the third aspect of this application includes the shock absorber 100 described above.

[0125] According to the third aspect of the present application, in the vehicle 1000, the guide component 10 of the shock absorber 100 is unidirectionally guided through the one-way channel 1 so that the high-temperature medium in the recovery chamber 41 flows to the compression chamber 42 through the one-way channel 1, thereby preventing the guide component 10 from being damaged or failing due to excessive heat, and ensuring the normal operation of the shock absorber 100.

[0126] The following description uses a specific embodiment as an example.

[0127] The shock absorber 100 of this embodiment is applied to a vehicle 1000. The shock absorber 100 has a guide assembly 10, which includes a first seal 51 (e.g., a PRFE sealing ring), a second seal 52 (e.g., a sealing ring), a guide 2, a one-way valve 11, etc. The guide 2 has a one-way channel 1. The one-way channel 1 allows the high-temperature medium in the recovery chamber 41 to flow to the compression chamber 42 containing the low-temperature medium, thereby reducing the temperature of the medium circulating in the shock absorber 100. The one-way valve 11 in the guide 2 allows the medium to flow from the recovery chamber 41 to the compression chamber 42, but does not allow the medium in the compression chamber 42 to flow to the recovery chamber 41 through the one-way channel 1. The first seal 51 and the second seal 52 of the guide assembly 10 form a sealing assembly, which can reduce the pressure in the chamber between the oil seal 3 and the guide 2, so that the lip of the oil seal 3 is not affected by the high-temperature medium and high pressure, thereby eliminating the problem of external leakage of the oil seal 3.

[0128] In the guide assembly 10, a one-way valve 11, a one-way channel 1, and a step seal assembly are arranged radially from the outside to the inside.

[0129] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0130] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0131] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0132] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A guide assembly (10) applied to a vibration damper (100) having a recovery chamber (41) and a compression chamber (42), characterized in that, The guide assembly (10) has a one-way channel (1) that connects the recovery chamber (41) and the compression chamber (42). The one-way channel (1) is unidirectionally open to allow the medium in the recovery chamber (41) to flow through the one-way channel (1) to the compression chamber (42).

2. The guide assembly (10) according to claim 1, characterized in that, The unidirectional channel (1) includes: The first channel segment (12) is connected to the restoration cavity (41); The second channel segment (13) is connected to the first channel segment (12) and is connected to the compression chamber (42); A one-way valve (11) is provided in the second channel section (13), through which the medium in the recovery chamber (41) can flow to the compression chamber (42).

3. The guide assembly (10) according to claim 2, characterized in that, The first channel segment (12) includes: The channel body segment (121) is connected to the restoration cavity (41); Throttling section (122) is connected to the end of the channel body section (121) away from the restoration cavity (41), and the medium flow area of ​​the throttling section (122) is smaller than the medium flow area of ​​the channel body section (121).

4. The guide assembly (10) according to claim 3, characterized in that, The medium flow area of ​​the throttling section (122) is 0.1 mm. 2 ~3mm 2 ; and / or, the length of the throttling section (122) is 0.3 mm to 4 mm.

5. A vibration damper (100), characterized in that, include: The guide component (10) according to any one of claims 2-4; Inner cylinder (71), the restoration cavity (41) is formed inside the inner cylinder (71), and the guide assembly (10) is disposed on one end of the inner cylinder (71); The outer cylinder (72) is sleeved on the circumferential outer side of the inner cylinder (71), the compression cavity (42) is formed between the outer cylinder (72) and the inner cylinder (71), and the outer cylinder (72) is sealed to the guide assembly (10).

6. The vibration damper (100) according to claim 5, characterized in that, The vibration damper (100) also includes: A piston is disposed inside the inner cylinder (71) and slides against the inner wall of the inner cylinder (71). A piston rod (8) has one end located inside the inner cylinder (71) and connected to the piston, and the other end located outside the inner cylinder (71). The piston rod (8) passes through the guide assembly (10).

7. The vibration damper (100) according to claim 6, characterized in that, The guide component (10) includes: The guide (2) is provided on the one-way channel (1); Oil seal (3), piston rod (8) passes through guide (2) and oil seal (3), oil seal chamber (43) is formed between piston rod (8), oil seal (3) and guide (2), oil seal chamber (43) is adapted to be connected to both the first channel section (12) and the second channel section (13), one-way valve (11) is set at one end of the second channel section (13) near the compression chamber (42).

8. The vibration damper (100) according to claim 7, characterized in that, The guide assembly (10) further includes a sealing structure (5), the guide (2) has a mounting hole (21), the piston rod (8) passes through the mounting hole (21), and the sealing structure (5) is disposed between the mounting hole (21) and the piston rod (8).

9. The vibration damper (100) according to claim 8, characterized in that, The sealing structure (5) includes at least: The first seal (51) is circumferentially disposed on the outer surface of the piston rod (8), and the inner circumference of the first seal (51) abuts against the piston rod (8). The second seal (52) is arranged around the outer periphery of the first seal (51) and the wall of the mounting hole (21), and the second seal (52) abuts against the outer periphery of the first seal (51) and the wall of the mounting hole (21).

10. The vibration damper (100) according to claim 9, characterized in that, The heat resistance of the first seal (51) is higher than that of the second seal (52).

11. The vibration damper (100) according to claim 9, characterized in that, The elastic modulus of the second seal (52) is lower than that of the first seal (51).

12. The vibration damper (100) according to claim 8, characterized in that, The guide (2) also has a snap ring hole (22), the diameter of which is larger than the diameter of the mounting hole (21), and the guide assembly (10) further includes: A pressure ring (61) abuts against the sealing structure (5) in the axial direction of the mounting hole (21). A retaining ring (62) is partially disposed in the retaining ring hole (22). The retaining ring (62) abuts against the side of the pressure ring (61) away from the sealing structure (5) so that the sealing structure (5) is axially fixed between the mounting hole (21) and the piston rod (8).

13. The vibration damper (100) according to claim 9, characterized in that, The guide assembly (10) further includes a bushing (63), and the guide (2) also has a bushing hole (23) connected to the mounting hole (21). The bushing (63) is installed in the bushing hole (23) and adapted to contact and engage with the piston rod (8). In the axial direction of the mounting hole (21), one end of the sealing structure (5) abuts against the guide (2) and / or the bushing (63).

14. The vibration damper (100) according to claim 7, characterized in that, The oil seal (3) includes: Oil seal body (31); At least one first lip (32) is connected to the oil seal body (31) and is interference-fitted with the piston rod (8); The second lip (33) is connected to the oil seal body (31) and abuts against the outer cylinder (72). Fastener (34) is fitted onto the outer peripheral surface of the first lip (32) to tightly attach the first lip (32) to the piston rod (8).

15. A vehicle (1000), characterized in that, Includes the damper (100) according to any one of claims 5-14.

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