Dustproof pipe and shock absorber

Abstract

The utility model discloses a dustproof pipe and a shock absorber, relates to the technical field of rail vehicle shock absorbers, and aims to reduce wind resistance borne by the dustproof pipe when a train moves and prolong the service life of parts. The dustproof pipe comprises a dustproof pipe body, the dustproof pipe body is provided with a through center hole, the center hole is used for penetrating through an oil storage cylinder of the shock absorber and a dustproof cover axially and movably connected with the oil storage cylinder, the dustproof pipe body comprises a first pipe part and a second pipe part, the first pipe part is used for fixedly sleeving the dustproof cover, one end of the second pipe part is connected with the first pipe part, and the other end of the second pipe part is connected with the oil storage cylinder. The other end of the second pipe part is used for being erected on the oil storage cylinder, smooth streamline transition is adopted from the end, away from the first pipe part, of the second pipe part to the first pipe part, and the pipe diameter of the second pipe part is gradually reduced from the end close to the first pipe part to the end away from the first pipe part.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle shock absorbers, in particular to a dustproof tube and a shock absorber. Background Art

[0002] Hydraulic shock absorbers are critical components on rail vehicles, requiring extremely high technical requirements. Their performance and component condition are directly related to ride comfort and safety. In recent years, with the rapid development of my country's high-speed rail technology, rail vehicle speeds have continued to increase, placing increasing demands on the technical requirements for hydraulic shock absorbers. Existing shock absorbers feature dust-proof tubes, secured to the shock absorber at both ends with hose clamps. This design increases the shock absorber's overall dimensions. Furthermore, the shock absorber's large travel requires consideration of the dust-proof tube's expansion and contraction space, i.e., the length available for tightening at both ends. This necessitates the installation of a large dust-proof tube with a corrugated structure to support the tube's movement without affecting the shock absorber's operation. Consequently, the large bellows and its corrugated structure increase the windward area, thereby increasing air resistance. This increases the relative motion caused by wind resistance, which is detrimental to the component's service life. Utility Model Content

[0003] The purpose of the utility model is to provide a dustproof pipe and a shock absorber, which are used to reduce the wind resistance suffered by the dustproof pipe when a train moves, thereby extending the service life of the parts.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0005] A dustproof tube is used to be installed on a shock absorber. The dustproof tube includes a dustproof tube body. The dustproof tube body is provided with a through center hole. The center hole is used to pass through the oil storage cylinder of the shock absorber and a dust cover axially movably connected to the oil storage cylinder. The dustproof tube body includes:

[0006] The first pipe part and the second pipe part, the first pipe part is used to be fixedly mounted on the outside of the dust cover, one end of the second pipe part is connected to the first pipe part, and the other end of the second pipe part is used to be mounted on the oil storage cylinder, and a smooth streamlined transition is adopted from the end of the second pipe part away from the first pipe part to the first pipe part, and the diameter of the second pipe part gradually decreases from the end close to the first pipe part to the end away from the first pipe part.

[0007] In the prior art arrangement in which the two ends of the dustproof bellows are respectively fixed on the dustproof cover and the oil storage cylinder, when the shock absorber is working, the dustproof cover moves in a direction close to the oil storage cylinder, and the dustproof tube, whose two ends are respectively fixed on the dustproof cover and the oil storage cylinder, is axially compressed as the dustproof cover moves in a direction close to the oil storage cylinder. During the compression process, considering that the stroke of the shock absorber during operation is too large, and considering the expansion and contraction space of the dustproof tube and the length for tightening at both ends, a large dustproof tube and a corrugated structure are required to ensure the normal operation of the shock absorber. The oversized dustproof tube and the corrugated structure increase the windward area and the wind resistance. In the dustproof tube provided by the present invention, the dustproof tube body includes a first tube portion and a second tube portion, the first tube portion is used to be fixedly mounted on the outside of the dust cover, one end of the second tube portion is connected to the first tube portion, and the other end of the second tube portion is used to be mounted on the oil storage cylinder, and a smooth streamlined transition is adopted from the end of the second tube portion away from the first tube portion to the first tube portion, and the diameter of the second tube portion gradually decreases from the end close to the first tube portion to the end away from the first tube portion.

[0008] The beneficial effects are as follows: the resistance on the windward surface includes the friction resistance caused by the shear stress of the air fluid on its surface and the air resistance caused by the air pressure on the windward surface. The windward surface adopts a streamlined design, and the flow rate of the air fluid on the streamlined surface is fast. According to Bernoulli's principle, the pressure on the streamlined surface is small, and the wind resistance on the streamlined surface is positively correlated with the pressure, so the wind resistance becomes smaller; at the same time, the streamlined surface is set to a smooth surface, which reduces the friction resistance caused by the shear stress of the air, thereby further reducing the air resistance. With such a setting, while reducing the air resistance, if the stroke of the shock absorber is too large to produce a large amplitude, or the vehicle turns or cuts the track, the second tube part of the dustproof tube can slide on the oil storage cylinder, so as not to affect the normal operation of the shock absorber. The dustproof tube and shock absorber provided by the present application reduce the volume of the dustproof tube, reduce the wind resistance of the dustproof tube when the train is moving, and extend the service life of the parts.

[0009] Optionally, in the above-mentioned dustproof tube, an angle between an inner wall of the second tube portion and an inner wall of the first tube portion is 155°-170°.

[0010] Optionally, in the above-mentioned dustproof tube, the material of the dustproof tube body includes EPDM rubber.

[0011] Optionally, in the above-mentioned dustproof tube, a clamping groove is opened around the outer wall of the first tube portion, and the clamping groove is used to cooperate with the throat clamp to fix the dustproof tube body on the dustproof cover.

[0012] Optionally, in the above-mentioned dustproof tube, a positioning structure is provided at the connection between the first tube portion and the second tube portion, the positioning structure radially extending toward the axis of the dustproof tube body, and the positioning structure is used to abut against the end face of the dust cover.

[0013] Optionally, in the above-mentioned dustproof tube, one end of the second tube portion for contacting the oil storage cylinder is provided with a rounded corner, and the rounded corner is used for contacting the oil storage cylinder.

[0014] The utility model also provides a shock absorber, including an oil storage cylinder and a dust cover, the dust cover is movably sleeved on one end of the oil storage cylinder along the axial direction of the oil storage cylinder; the shock absorber also includes a dust tube as described in any of the above embodiments, the first tube portion of the dust tube body is fixed to the dust cover, and one end of the second tube portion of the dust tube body is placed on the oil storage cylinder.

[0015] Compared with the prior art, the beneficial effects of the vibration damper provided by the embodiment of the present invention are the same as the beneficial effects brought about by the dustproof tube described in the above technical solution, and will not be elaborated here.

[0016] Optionally, the above-mentioned shock absorber further includes a wear-resistant ring, which is fixedly sleeved on the oil storage cylinder and is used to contact one end of the second pipe part.

[0017] Optionally, in the aforementioned shock absorber, the wear-resistant ring includes a sleeve having a plurality of through-holes formed in its wall. The sleeve is mounted on the outer wall of the oil reservoir and is circumferentially fixed relative to the oil reservoir. The second end of the dustproof tube is mounted on the sleeve. The dustproof tube is movable up and down relative to the sleeve under the action of an external force to controllably cover the through-holes.

[0018] Optionally, in the above-mentioned shock absorber, the inner diameter of one end of the second pipe portion for being mounted on the oil storage cylinder is smaller than the outer diameter of the oil storage cylinder, so as to be interference fit with the oil storage cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the matching structure of a vibration damper and a dustproof tube in the prior art;

[0021] Figure 2 A schematic structural diagram of a dustproof tube provided in an embodiment of the present utility model;

[0022] Figure 3 A front view of a wear-resistant ring provided in an embodiment of the utility model;

[0023] Figure 4 This is a partial enlarged view of DD of a wear-resistant ring provided in an embodiment of the utility model.

[0024] Reference numerals: 1 is the first pipe portion, 2 is the second pipe portion, 3 is the slot, 4 is the positioning structure, 5 is the fillet, 6 is the oil storage cylinder, 7 is the dust cover, 8 is the dustproof bellows, and 9 is the wear-resistant ring. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0028] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] Figure 1The figure shows the dustproof bellows 8 in the prior art and its structure in cooperation with the shock absorber. The two ends of the dustproof bellows 8 in the prior art are respectively fixed on the dust cover and the oil storage cylinder. When the shock absorber is working, the dust cover moves in the direction close to the oil storage cylinder. The dustproof bellows 8 with two ends respectively fixed on the dust cover and the oil storage cylinder are axially compressed as the dust cover moves in the direction close to the oil storage cylinder. During the compression process, considering that the stroke of the shock absorber is too large during operation, and considering the expansion and contraction space of the dustproof bellows 8 and the length for tightening at both ends, a large dustproof tube is required and a corrugated structure is provided on it to ensure the normal operation of the shock absorber. The oversized dustproof tube and corrugated structure increase the windward area and the wind resistance.

[0031] See also Figure 2 , an embodiment of the utility model provides a dustproof tube for being arranged on a shock absorber, comprising a dustproof tube body, the dustproof tube body being provided with a through center hole, the center hole being used to pass through the oil storage cylinder 6 of the shock absorber and the dustproof cover 7 axially movably connected to the oil storage cylinder 6, the dustproof tube body comprising a first tube portion 1 and a second tube portion 2, the first tube portion 1 being used to be fixedly sleeved on the outside of the dustproof cover 7, one end of the second tube portion 2 being connected to the first tube portion 1, and the other end of the second tube portion 2 being used to be mounted on the oil storage cylinder 6, a smooth streamlined transition being adopted from the end of the second tube portion 2 away from the first tube portion 1 to the first tube portion 1, and a diameter of the second tube portion 2 gradually shrinks from the end close to the first tube portion 1 to the end away from the first tube portion 1.

[0032] During specific implementation: the dustproof tube body is sleeved on the outside of the shock absorber through the center hole. Specifically, the center hole of the dustproof tube body passes through the oil storage cylinder 6 of the shock absorber and the dust cover 7 axially movably connected to the oil storage cylinder 6. The dustproof tube body includes a first tube part 1 and a second tube part 2 connected to each other. The first tube part 1 is fixedly sleeved on the outside of the dust cover 7, and one end of the second tube part 2 is placed on the oil storage cylinder 6 and can slide on the oil storage cylinder 6; the resistance on the windward surface includes the friction resistance caused by the shear stress of the air fluid on its surface and the air resistance caused by the air pressure on the windward surface. The windward surface adopts a streamlined design, and the flow rate of the air fluid on the streamlined surface is fast. According to Bernoulli's principle, the pressure on the streamlined surface is small, the wind resistance on the streamlined surface is positively correlated with the pressure, and the wind resistance becomes smaller; at the same time, the streamlined surface is set to a smooth surface, which reduces the friction resistance caused by the shear stress of the air, thereby further reducing the air resistance. This arrangement reduces air resistance while allowing the second tube portion 2 of the dustproof tube to slide on the oil reservoir 6 if the shock absorber's travel is too large, resulting in a large amplitude, or if the vehicle turns or cuts track, without affecting the normal operation of the shock absorber. The dustproof tube and shock absorber provided in this application reduce the volume of the dustproof tube, reduce the wind resistance experienced by the dustproof tube during train movement, and extend the service life of the components.

[0033] As a possible implementation, the angle between the inner wall of the second tube portion 2 and the inner wall of the first tube portion 1 is 155°-170°. Specifically, the angle can be 155 degrees, 160 degrees, or 170 degrees. When the distance between the dust cover 7 and the cylinder wall of the oil storage cylinder 6 is constant, the angle between the inner wall of the second tube portion 2 and the inner wall of the first tube portion 1 affects the area that can be protected. When the angle is too large, the slope of the second tube portion 2 is small. The wind resistance on the dustproof tube body is calculated as follows: the direction of the wind pressure on the windward surface is perpendicular to the windward surface, the wind pressure is integrated on the windward surface, and the resultant force obtained by this integration is projected along the direction of motion to obtain the resistance on the windward surface. It should be noted that the magnitude of the air pressure is related to the flow rate of the air on the surface of the object and the smoothness of the surface of the object. Therefore, under the condition that the material of the windward surface of the dustproof tube is certain, that is, when the air flow rate and smoothness on the windward surface of the dustproof tube are certain, the air resistance on the dustproof tube body is related to two factors: one is the area of ​​the windward surface, and the other is the slope of the windward surface. The area of ​​the windward surface affects the size of the integral domain when integrating the air pressure. The larger the area, the greater the air resistance obtained by the integration; the slope of the windward surface affects the cosine value of the surface normal of the windward surface (that is, the direction of action of the air pressure) and the direction of movement. The larger the slope, the larger the cosine value, and thus the greater the resistance to the dustproof tube. Therefore, after comprehensive consideration of the windward area and the slope of the windward surface, the angle between the inner wall of the second tube part 2 and the inner wall of the first tube part 1 is set to be between 155° and 170°, so as to achieve the best effect of reducing wind resistance.

[0034] Furthermore, the dustproof tube body is made of EPDM rubber. The EPDM rubber employed is self-lubricating. When the second tube portion 2 of the dustproof tube body slides on the oil reservoir 6, the self-lubricating EPDM rubber can rapidly, continuously, and evenly release lubricant even as the lubricant is continuously consumed, ensuring a low-friction effect during dynamic operation and avoiding dry friction. This prevents excessive friction between the second tube portion 2 of the dustproof tube body and the oil reservoir 6, which could damage the oil reservoir 6 and damage the paint on the oil reservoir 6. Furthermore, the lubricant continuously released by the self-lubricating EPDM rubber can enhance gas exchange at the free end. Furthermore, the windward surface of the EPDM rubber, which continuously releases lubricant, is relatively smooth. This smooth windward surface reduces frictional resistance caused by shear stress, further reducing air resistance.

[0035] As a possible implementation, a clamping groove 3 is provided around the outer wall of the first pipe portion 1. The clamping groove 3 is used to cooperate with the throat clamp to fix the dustproof pipe body to the dustproof cover 7. The clamping groove 3 is provided around the outer wall of the first pipe portion 1. When the dustproof pipe is fixedly installed on the vibration damper, the throat clamp is placed in the clamping groove 3 and the throat clamp is locked. This ensures that the throat clamp does not fall out of the clamping groove 3, stably fixing the dustproof pipe to the vibration damper, and ensuring the stability of its connection.

[0036] As a possible implementation, a positioning structure 4 is provided at the connection between the first tube portion 1 and the second tube portion 2. The positioning structure 4 extends radially toward the axis of the dustproof tube body and is used to abut against the end face of the dustproof cover 7. During installation, the positioning structure 4 can be tightly contacted with the end face of the dustproof cover 7, and then the second tube portion 2 of the dustproof tube body is sleeved on the dustproof cover 7 and fixed, which facilitates the installation of the dustproof tube outside the dustproof cover 7.

[0037] The beneficial effect of such a configuration is that, since the shock absorber is installed parallel to the vehicle's forward direction, when the vehicle is moving forward, the air resistance generated by the vehicle's forward movement will start from the first tube portion 1 of the dustproof tube body, giving the dustproof tube a tendency to move backward along the shock absorber. As a result, the second tube portion 2 of the dustproof tube body will have a tendency to move backward along the shock absorber, which may cause the dustproof tube to fall off over time. Due to the presence of this positioning structure 4, the positioning structure 4 contacts and limits the dust cover 7, bearing part of the wind resistance, reducing the movement trend of the second tube portion 2 of the dustproof tube body, ensuring that the dustproof tube is better fixed to the dust cover 7, and improving the service life of the device.

[0038] Furthermore, the end of the second tube portion 2 that contacts the oil reservoir 6 is provided with a rounded corner 5. This rounded corner 5 allows the dust shield to contact the oil reservoir 6 via this corner. This rounded corner 5 reduces stress concentration and the risk of component cracking. When the second tube portion 2 of the dust shield body slides over the oil reservoir 6, a curved surface reduces frictional damage to the oil reservoir 6, compared to a sharp point, thereby increasing the service life of the shock absorber.

[0039] The present invention also provides a shock absorber, comprising an oil reservoir 6 and a dust cover 7, the dust cover 7 being movably sleeved on one end of the oil reservoir 6 along the axial direction of the oil reservoir 6. The shock absorber further comprises any of the aforementioned dust-proof tubes, wherein the first tube portion 1 of the dust-proof tube body is fixed to the dust cover 7, and one end of the second tube portion 2 of the dust-proof tube body is mounted on the oil reservoir 6. The beneficial effects of the shock absorber provided by the present invention are as mentioned above and will not be elaborated here.

[0040] As a possible implementation, a shock absorber provided in the embodiment further includes a wear-resistant ring 9, which is fixedly sleeved on the oil storage cylinder 6 and is used to contact the second tube portion 2 of the dustproof tube body.

[0041] During specific implementation: the wear-resistant ring 9 is fixedly sleeved on the outer wall of the oil storage cylinder 6. Due to the presence of the wear-resistant ring 9, the contact between the second tube portion 2 of the dustproof tube body and the oil storage cylinder 6 is isolated, so that the second tube portion 2 of the dustproof tube body slides on the wear-resistant ring 9, thereby avoiding friction between the second tube portion 2 of the dustproof tube body and the oil storage cylinder 6, and damaging the paint on the outside of the oil storage cylinder 6.

[0042] Furthermore, the wear-resistant ring 9 includes: a sleeve, and a plurality of through holes are provided on the wall of the sleeve. The sleeve is mounted on the outer wall of the oil storage cylinder 6, and the sleeve is circumferentially fixed relative to the oil storage cylinder 6. The second end of the dustproof tube is mounted on the sleeve, and the dustproof tube can move up and down relative to the sleeve under the action of external force, so as to controllably cover the through hole. It should be noted that the external force can come from the oil storage cylinder 6, or from other devices, such as manual drive. The above-mentioned "covering the through hole in a controllable manner" can be understood as when the shock absorber is in a stretched state, the dustproof tube gradually exposes the through hole, so that the through hole is connected to the outside world. When the shock absorber is in a compressed state, the dustproof tube gradually covers the through hole.

[0043] In the wear-resistant ring 9 provided in the embodiment of the present invention, a sleeve is mounted on the outer wall of the oil reservoir 6 and is circumferentially fixed relative to the oil reservoir 6. Furthermore, the second end of the dustproof tube is mounted on the sleeve. As can be seen from the above, the presence of the wear-resistant ring 9 prevents direct contact between the dustproof tube and the oil reservoir 6, i.e., the dustproof tube and the oil reservoir 6 do not come into direct contact. Therefore, during operation of the shock absorber, as the dustproof tube moves toward or away from the oil reservoir 6, friction between the dustproof tube and the oil reservoir 6 is avoided, thereby preventing wear and tear on the oil reservoir 6. This eliminates the possibility of paint on the outer wall of the oil reservoir 6 being worn off due to friction, thereby increasing the service life of the oil reservoir 6 and, consequently, the shock absorber. This also ensures the aesthetic appearance of the oil reservoir 6, thereby ensuring the aesthetic appearance of the shock absorber. Furthermore, because the sleeve has multiple through-holes, the sleeve is not only lighter than a sleeve without through-holes, but also uses less material, thus reducing the material cost. Furthermore, since the dustproof tube can move up and down relative to the sleeve under the action of external force, it can controllably cover the through-hole. At this time, the through-hole opened on the sleeve can replace the through-hole originally opened on the side wall of the dustproof tube. The air inhaled and exhaled during the operation of the shock absorber can enter or be discharged through the above-mentioned through-hole, realizing the air exchange between the inside and outside of the shock absorber and ensuring the normal operation of the shock absorber. At the same time, it can also reduce or avoid the occurrence of condensation in spring and autumn or the accumulation of rainwater that penetrates through the through-hole originally opened on the side wall of the dustproof tube between the dustproof tube and the oil storage cylinder, so that the dew or rainwater can be discharged through the through-hole, thereby reducing or eliminating the probability of dew or rainwater corroding the oil storage cylinder, further improving the service life of the oil storage cylinder 6, and thus further improving the service life of the shock absorber.

[0044] As a possible implementation method, the inner diameter of the end of the second tube portion 2 that is mounted on the oil reservoir 6 is smaller than the outer diameter of the oil reservoir 6, and is used for interference fit with the oil reservoir 6. Specifically, the dustproof tube has a certain elastic modulus to ensure that the dustproof tube can be interference fit with the oil reservoir 6. The diameter of the circle formed by the smallest inner diameter of the second tube portion 2 is larger than the outer diameter of the oil reservoir 6. The purpose of this arrangement is to increase the connection force between the second tube portion 2 and the oil reservoir 6, while also preventing the second tube portion 2 from sliding too much on the oil reservoir 6 when the vehicle moves, thereby limiting the radial change distance of the dustproof tube and reducing the space occupied by the dustproof tube. In models equipped with dual shock absorbers, this solves the problem of some EMU platforms having no space to install an external dustproof tube. In addition, because the dustproof tube is made of elastic material, the second tube portion 2 is movably mounted on the oil reservoir 6, so that the free end of the dustproof tube can be flipped outward at any time to observe whether the shock absorber has defects such as oil leakage, which can make leak detection more convenient and intuitive.

[0045] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A dustproof tube, characterized in that: The dustproof tube is used to be set on the shock absorber, and the dustproof tube includes a dustproof tube body. The dustproof tube body is provided with a through center hole. The center hole is used to pass through the oil storage cylinder of the shock absorber and the dust cover axially connected to the oil storage cylinder. The dustproof tube body includes: A first pipe part and a second pipe part, the first pipe part is used to be fixedly mounted on the outside of the dust cover, one end of the second pipe part is connected to the first pipe part, and the other end of the second pipe part is used to be placed on the oil storage cylinder, a smooth streamlined transition is adopted from the end of the second pipe part away from the first pipe part to the first pipe part, and the diameter of the second pipe part gradually decreases from the end close to the first pipe part to the end away from the first pipe part.

2. The dustproof tube according to claim 1, characterized in that: An included angle between the inner wall of the second tube portion and the inner wall of the first tube portion is 155°-170°.

3. The dustproof tube according to claim 1, characterized in that: The material of the dustproof tube body includes EPDM rubber.

4. The dustproof tube according to claim 1, characterized in that: A clamping groove is provided around the outer wall of the first pipe portion, and the clamping groove is used to cooperate with a throat clamp to fix the dustproof pipe body on the dustproof cover.

5. The dustproof tube according to claim 1, characterized in that: A positioning structure is provided at the connection between the first tube portion and the second tube portion. The positioning structure extends radially toward the axis of the dustproof tube body and is used to abut against the end surface of the dustproof cover.

6. The dustproof tube according to claim 1, characterized in that: One end of the second pipe portion that is in contact with the oil storage cylinder is provided with a rounded corner, and the rounded corner is used to contact with the oil storage cylinder.

7. A shock absorber, comprising an oil storage cylinder and a dust cover, wherein the dust cover is movably sleeved on one end of the oil storage cylinder along the axial direction of the oil storage cylinder; characterized in that: It also includes the dustproof tube according to any one of claims 1 to 6, wherein the first tube portion of the dustproof tube body is fixed to the dustproof cover, and one end of the second tube portion of the dustproof tube body is placed on the oil storage cylinder.

8. The shock absorber according to claim 7, characterized in that It also includes a wear-resistant ring, which is fixedly sleeved on the oil storage cylinder and is used to contact one end of the second pipe part.

9. The shock absorber according to claim 8, characterized in that The wear-resistant ring comprises: A sleeve, wherein a plurality of through holes are formed on the wall of the sleeve; The sleeve is sleeved on the outer side wall of the oil storage cylinder and is circumferentially fixed relative to the oil storage cylinder; the second end of the dustproof tube is placed on the sleeve; the dustproof tube can move up and down relative to the sleeve under the action of external force to controllably cover the through hole.

10. The shock absorber according to claim 7, characterized in that The inner diameter of one end of the second pipe portion used for being mounted on the oil storage cylinder is smaller than the outer diameter of the oil storage cylinder, and is used for interference fit with the oil storage cylinder.

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