Dustproof pipe and shock absorber

Abstract

The utility model discloses a dustproof pipe and a shock absorber, relates to the technical field of shock absorbers of railway vehicles, and aims to solve the problem that the dustproof pipe cannot be additionally mounted on a shock absorber with a narrow external space. The dustproof pipe is used for being arranged on the shock absorber and comprises a dustproof pipe body, the dustproof pipe body comprises a free end, an extension section and a fixed section which are sequentially connected, and the free end is used for being movably erected on an oil storage cylinder in the axial direction of the oil storage cylinder; the extension section is folded into a corrugated shape in the axial direction of the dustproof pipe body, and streamline transition is adopted from the edge of the free end to the crest closest to the free end; a limiting structure is arranged on the inner wall of the fixing section, extends towards the axis of the dustproof pipe body and is used for abutting against the end face of the dustproof cover, and the fixing section is used for being fixed to the dustproof cover. The shock absorber comprises the dustproof pipe, the shock absorber comprises an oil storage cylinder and a dustproof cover, the free end of the dustproof pipe body is movably erected on the oil storage cylinder in the axial direction of the oil storage cylinder, and the fixed section of the dustproof pipe body is fixed to the dustproof cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle shock absorber technical field especially relates to a dustproof pipe and shock absorber. BACKGROUND

[0002] Oil pressure shock absorber is the key part on the railway vehicle, has very high technical content, and its working performance and part state are directly related to the comfort and safety of the railway vehicle, in recent years, along with the rapid development of our country high -speed rail technology, the speed of railway vehicle is also constantly improving, and the technical requirement of oil pressure shock absorber is also higher and higher. The dustproof structure on the existing shock absorber can set up dustproof pipe dustproof, and the two ends of the external dustproof pipe are fixed to the shock absorber by using a hose clamp, so that the structure of the setting makes the outer contour size of the shock absorber increase, and the shock absorber has a large stroke, so the problem of the expansion space of the dustproof pipe, i.e. the length of the two ends for tightening, needs to be considered, which can cause the overall structure of the dustproof pipe to be large and require a large installation space, thereby causing some motor trains to be unable to install the dustproof pipe due to the small space. SUMMARY

[0003] The utility model discloses a dustproof pipe and shock absorber, which is used for reducing the volume of the dustproof pipe and solving the problem that the motor train cannot install the dustproof pipe due to the small space.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0005] Firstly, the utility model provides a dustproof pipe, which is used for setting in a shock absorber and includes a dustproof pipe body, the dustproof pipe body is provided with a through center hole, the center hole is used for penetrating an oil storage cylinder of the shock absorber and a dustproof cover axially movably connected with the oil storage cylinder, and the dustproof pipe body includes a free end, an extension section and a fixed section connected in sequence; wherein the free end is used for being movably arranged on the oil storage cylinder along the axial direction of the oil storage cylinder; the extension section is folded in a corrugated shape along the axial direction of the dustproof pipe body, and the edge of the free end to the nearest wave crest is transitioned in a streamline shape; the inner wall of the fixed section is provided with a limiting structure, the limiting structure extends to the axial line of the dustproof pipe body, the limiting structure is used for abutting against the end face of the dustproof cover, and the fixed section is used for being fixed on the dustproof cover.

[0006] Compared with the setting that the two ends of the dustproof pipe are respectively fixed on the dust cover and the oil storage cylinder in the prior art, the dustproof pipe is axially compressed along with the movement of the dust cover close to the oil storage cylinder during the working process of the shock absorber, and the volume of the dustproof pipe is inevitably too large due to the excessive stroke during the working process of the shock absorber and the length of the two ends for fastening, so that the dustproof pipe cannot be installed in a narrow space. The fixing section of the dustproof pipe is sleeved on the dust cover, and the free end of the dustproof pipe is movably sleeved on the oil storage cylinder along the axial direction of the oil storage cylinder, so that the small amplitude generated during the working process of the shock absorber can be absorbed by the extension section of the dustproof pipe, and when the stroke of the shock absorber is too large to generate a large amplitude or the vehicle turns or changes tracks, the free end of the dustproof pipe can slide relative to the oil storage cylinder, so that the normal working of the shock absorber is not affected, the relatively small wave peak of the extension section can be arranged, and the volume of the dustproof pipe is reduced, so that the normal working stroke of the shock absorber is not affected, and therefore, the volume of the dustproof pipe is reduced, so that the problem that the shock absorber cannot be additionally provided with the dustproof pipe in a narrow space is solved.

[0007] Optionally, in the dustproof pipe, the limiting structure comprises a first annular protruding part extending radially towards the axis of the dustproof pipe body.

[0008] Optionally, in the dustproof pipe, the free end is provided with a round corner for contacting the oil storage cylinder.

[0009] Optionally, in the dustproof pipe, a clamping groove is formed along the outer wall of the fixing section, and the clamping groove is used for cooperating with the throat ring to fix the dustproof pipe body on the dust cover.

[0010] Optionally, in the dustproof pipe, an end of the fixing section away from the extension section is provided with a second annular protruding part extending radially towards the axis of the dustproof pipe body, and the second annular protruding part is used for interference fit with the dust cover.

[0011] Optionally, in the dustproof pipe, the material of the dustproof pipe body comprises ethylene-propylene-diene rubber.

[0012] In the second aspect, the utility model also provides a shock absorber, which comprises 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 free end of the dustproof pipe body is movably arranged on the oil storage cylinder along the axial direction of the oil storage cylinder, and the fixing section of the dustproof pipe body is fixed on the dust cover. In this way, the overall volume of the shock absorber when the dustproof pipe is additionally arranged outside is reduced, and the problem that the dustproof pipe cannot be additionally arranged outside due to the small external space of the motor train unit is solved.

[0013] Optionally, the shock absorber further comprises a wear-resistant ring, the wear-resistant ring is fixedly sleeved on the oil storage cylinder, and the wear-resistant ring is used for being in contact with the free end of the dustproof pipe body.

[0014] Optionally, the wear-resistant ring comprises a sleeve, a plurality of through holes are formed in the sleeve wall of the sleeve, the sleeve is sleeved on the outer side wall of the oil storage cylinder, and the sleeve is fixed in the circumferential direction relative to the oil storage cylinder.

[0015] Optionally, in the shock absorber, the free end of the dustproof pipe body is in interference fit with the oil storage cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0017] Figure 1 FIG. 1 is a schematic view of a cooperation structure of a shock absorber and a dustproof pipe in the prior art;

[0018] Figure 2 FIG. 1 is a schematic view of a cooperation structure of a shock absorber and a dustproof pipe in the prior art;

[0019] Figure 3 FIG. 1 is a schematic view of a cooperation structure of a shock absorber and a dustproof pipe in the prior art;

[0020] Figure 4 FIG. 1 is a schematic view of a cooperation structure of a shock absorber and a dustproof pipe in the prior art;

[0021] The figure legend is as follows: 1 is a free end, 2 is an extension section, 3 is a fixed section, 4 is a first annular protruding part, 5 is a second annular protruding part, 6 is an oil storage cylinder, 7 is a dust cover, 8 is a dustproof pipe, 9 is a wear-resistant ring, 101 is a round corner, and 301 is a clamping groove. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.

[0024] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly pointing out the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise explicitly and specifically limited.

[0025] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0026] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Please refer to Figure 1 , Figure 1 For the case of setting the dustproof pipe 8 on the shock absorber in the prior art, during the working process of the shock absorber, since the dust cover moves along the direction close to the oil storage cylinder, the dustproof pipe 8 fixed at both ends of the dust cover and the oil storage cylinder is axially compressed along the movement of the dust cover close to the oil storage cylinder. During the compression process, considering the excessive stroke during the working process of the shock absorber, and considering the expansion space of the dustproof pipe 8 and the length of the two ends for tightening, the volume of the entire dustproof pipe 8 is inevitably too large, and the excessively large dustproof pipe 8 cannot be installed in the situation where the installation space is small.

[0028] Please refer to Figure 2The utility model discloses an anti -dusting pipe, anti -dusting pipe is used for setting in shock absorber, including anti -dusting pipe body, anti -dusting pipe body is provided with the through center hole, center hole is used for passing shock absorber's oil storage cylinder 6 and with oil storage cylinder 6 axial movable joint's dust cover 7, anti -dusting pipe body includes the free end 1, extension section 2 and fixed section 3 that are connected in proper order in sequence;Wherein, the free end 1 is used for along the axial movable erection of oil storage cylinder 6 on oil storage cylinder 6;Extension section 2 is folded as the corrugated along the axial direction of anti -dusting pipe body, and the edge of free end 1 adopts streamline transition to the nearest wave crest thereof;The inner wall of fixed section 3 is provided with a limiting structure, the limiting structure extends to the axis of the anti -dusting pipe body, and the limiting structure is used for abutting to the end face of the dust cover 7, and the fixed section 3 is used for fixing on the dust cover 7.

[0029] When implemented specifically: the fixed section 3 of the anti -dusting pipe is fixedly sleeved on the dust cover 7, the free end 1 of the anti -dusting pipe is movably sleeved on the oil storage cylinder 6 along the axial direction of the oil storage cylinder 6, and small amplitude generated during the working process of the shock absorber can be absorbed by the extension section 2 of the anti -dusting pipe, and when the stroke of the shock absorber is too large to generate large amplitude, or when the vehicle turns or cuts the track, the free end 1 of the anti -dusting pipe can also slide relative to the oil storage cylinder 6, so that the normal working of the shock absorber is not affected, that is, only a few wave crests can be arranged on the extension section 2, and the volume of the anti -dusting pipe can be reduced, so that the normal working stroke of the shock absorber is not affected, therefore, the volume of the anti -dusting pipe is reduced, thereby solving the problem that the shock absorber cannot be additionally provided with the anti -dusting pipe in a narrow space.

[0030] As a possible implementation manner, the limiting structure includes a first annular protruding portion 4 extending radially towards the axis of the anti -dusting pipe body, and when installed, the limiting ring can be tightly contacted to the outer edge of the dust cover 7, and then the fixed section 3 of the anti -dusting pipe is sleeved on the dust cover 7 and fixed, which facilitates the installation of the anti -dusting pipe on the outside of the dust cover 7.

[0031] The beneficial effects of such a setting are: since the shock absorber is installed parallel to the forward direction of the vehicle, when the vehicle is moving forward, the air resistance generated during the movement of the vehicle will pass through the free end 1 of the anti -dusting pipe, through the extension section 2, and give the anti -dusting pipe a movement trend along the rear of the shock absorber, so that the fixed section 3 of the anti -dusting pipe will have a movement trend along the rear of the shock absorber, and in the long run, the connection of the fixed section 3 of the anti -dusting pipe will be unstable. Due to the existence of the limiting ring, the limiting ring is in contact with the dust cover 7 and is limited, and bears part of the pressure brought by the wind resistance, so that the movement trend of the fixed section 3 of the anti -dusting pipe is reduced, which ensures that the anti -dusting pipe is better fixed on the dust cover 7, and improves the service life of the device.

[0032] Further, a fillet 101 is arranged at the contact position of the free end 1 of the dustproof tube and the oil storage cylinder 6, and the dustproof tube contacts the oil storage cylinder 6 through the fillet 101. The fillet 101 can reduce stress concentration and reduce the risk of part cracking. When the free end 1 of the dustproof tube slides on the oil storage cylinder 6, compared with the case that the contact position of the dustproof tube is a sharp end, arranging the contact position as a curved surface can reduce the friction damage of the oil storage cylinder 6, and improve the service life of the shock absorber.

[0033] As a possible implementation, a clamping groove 301 is arranged along the outer wall of the fixed section 3, and the clamping groove 301 is used to cooperate with the throat clamp to fix the dustproof tube body on the dustproof cover 7. The clamping groove 301 is arranged along the outer wall of the fixed section 3 of the dustproof cover 7, and when the dustproof tube is fixed and installed on the shock absorber, the throat clamp is arranged in the clamping groove 301, and the throat clamp is locked. In this way, it can be ensured that the throat clamp does not fall out of the clamping groove 301, and the dustproof tube is stably fixed on the shock absorber, thereby ensuring the stability of the connection.

[0034] As a possible implementation, the end of the fixed section 3 away from the extension section 2 is provided with a second annular protruding part 5 extending radially towards the axis of the dustproof tube body. Specifically, the protruding part is annular, and the annular protruding part extends towards the axis of the dustproof tube, thereby reducing the inner diameter of the end of the fixed section 3 of the dustproof tube. The radial distance of the annular protruding part extending towards the axis of the dustproof tube is less than the outer diameter of the dustproof cover 7, thereby realizing the interference fit of the dustproof tube and the dustproof cover 7, increasing the connection force between the fixed section 3 of the dustproof tube and the dustproof cover 7, and ensuring the stability of the dustproof tube.

[0035] As a possible implementation, the material of the dustproof tube body includes ethylene propylene diene rubber. The ethylene propylene diene rubber used can have a self-lubricating effect. When the free end 1 of the dustproof tube slides on the oil storage cylinder 6, the self-lubricating ethylene propylene diene rubber can continuously and uniformly release lubricant to ensure a low-friction effect in a dynamic process, avoid dry friction, and avoid excessive friction between the free end 1 of the dustproof tube and the oil storage cylinder 6, thereby causing friction damage to the oil storage cylinder 6 and damaging the paint on the outside of the oil storage cylinder 6. At the same time, the lubricant continuously released by the self-lubricating ethylene propylene diene rubber can also enhance the gas exchange at the free end 1. In addition, the windward surface of the ethylene propylene diene rubber that can continuously release lubricant is relatively smooth, which reduces the friction resistance caused by shear stress and further reduces air resistance.

[0036] The utility model embodiment further provides a shock absorber, including oil storage cylinder 6 and dustproof cover 7, dustproof cover 7 is along the axial activity of oil storage cylinder 6 and is arranged in one end of oil storage cylinder 6, the shock absorber still includes the dustproof tube as the above described embodiment describes, the free end 1 of dustproof tube body is along the axial activity of oil storage cylinder 6 and is arranged in oil storage cylinder 6, and the fixed section 3 of dustproof tube body is fixed to dustproof cover 7.

[0037] In particular implementation: the free end 1 of the dustproof pipe body is movably arranged on the oil storage cylinder 6 along the axial direction, and the fixed section 3 of the dustproof pipe body is fixed to the dust cover 7. In this way, when the shock absorber works, the dust cover 7 moves relative to the oil storage cylinder 6 along the axial direction of the oil storage cylinder 6, and the free end 1 of the dustproof pipe body slides on the oil storage cylinder 6, thereby reducing the space required for adding the dustproof pipe.

[0038] As a possible implementation, the shock absorber provided by the embodiment further comprises a wear-resistant ring 9, which is fixedly sleeved on the oil storage cylinder 6, and the wear-resistant ring 9 is used to contact the free end 1 of the dustproof pipe body.

[0039] In particular 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 free end 1 of the dustproof pipe is isolated from the oil storage cylinder 6, so that the free end 1 of the dustproof pipe slides on the wear-resistant ring 9, thereby avoiding friction between the free end 1 of the dustproof pipe and the oil storage cylinder 6 and damaging the paint on the outer part of the oil storage cylinder 6.

[0040] Further, the wear-resistant ring 9 comprises a sleeve, and a plurality of through holes are formed in the sleeve wall of the sleeve. The sleeve is sleeved on the outer side wall of the oil storage cylinder 6, and the sleeve is fixed relative to the oil storage cylinder 6 in the circumferential direction. The second end of the dustproof pipe is arranged on the sleeve, and the dustproof pipe can move up and down relative to the sleeve under the action of an external force to controllably cover the through holes. It should be noted that the above-mentioned external force can come from the oil storage cylinder 6 or from other devices, such as manual driving. The above-mentioned "controllably covering the through holes" can be understood as that when the shock absorber is in a stretched state, the dustproof pipe gradually exposes the through holes to make the through holes communicate with the outside. When the shock absorber is in a compressed state, the dustproof pipe gradually covers the through holes.

[0041] Referring to Figures 3-4The utility model discloses an anti -wear ring 9, sleeve is equipped on the outside wall of oil storage cylinder 6, and sleeve is fixed relative to the circumferential direction of oil storage cylinder 6. Further, the second end of dustproof pipe is arranged on the sleeve. As can be known from the above, due to the existence of the anti -wear ring 9, the direct contact between the dustproof pipe and the oil storage cylinder 6 is isolated, that is, the dustproof pipe and the oil storage cylinder 6 do not directly contact. Therefore, during the movement of the dustproof pipe along the direction of approaching or moving away from the oil storage cylinder 6 during the operation of the shock absorber, friction between the dustproof pipe and the oil storage cylinder 6 can be avoided, thereby avoiding the abrasion of the oil storage cylinder 6 by the dustproof pipe, eliminating the probability of paint abrasion and falling off on the outer wall of the oil storage cylinder 6 due to friction, improving the service life of the oil storage cylinder 6, and further improving the service life of the shock absorber. At the same time, the appearance of the oil storage cylinder 6 can also be ensured to be beautiful, so as to ensure the appearance of the shock absorber to be beautiful. Further, due to the sleeve wall being provided with a plurality of through holes, compared with the sleeve without through holes, the weight of the sleeve is reduced, the material for manufacturing the sleeve is saved, and the material cost of the sleeve is reduced. Further, due to the dustproof pipe being movable up and down relative to the sleeve under the action of external force, the through holes can be covered controllably. At this time, the through holes provided on the sleeve can replace the original through holes provided on the side wall of the dustproof pipe, and the air inhaled and exhaled during the operation of the shock absorber can enter or exit through the above-mentioned through holes, realizing the exchange of air inside and outside the shock absorber, and ensuring the normal operation of the shock absorber. At the same time, spring and autumn dew or rainwater seeping through the original through holes provided on the side wall of the dustproof pipe can also be reduced or avoided to accumulate between the dustproof pipe and the oil storage cylinder 6, so that the dew or rainwater can be discharged through the through holes, so as to reduce or eliminate the probability of rusting of the oil storage cylinder 6 by the dew or rainwater, further improve the service life of the oil storage cylinder 6, and further improve the service life of the shock absorber.

[0042] As a possible implementation manner, the free end 1 of the dustproof pipe body is in interference fit with the oil storage cylinder 6. Specifically, the dustproof pipe has a certain elastic modulus, which ensures that the free end 1 of the dustproof pipe can be in interference fit with the oil storage cylinder 6. The diameter of the circle formed by the minimum inner diameter of the free end 1 of the dustproof pipe is greater than the outer diameter of the oil storage cylinder 6. The purpose of such arrangement is to increase the connection force between the free end 1 of the dustproof pipe and the oil storage cylinder 6, and to limit the sliding distance of the free end 1 of the dustproof pipe on the oil storage cylinder 6 when the vehicle moves, thereby reducing the occupied space of the dustproof pipe and solving the problem of no space for adding the external dustproof pipe in some motor train unit platforms. In addition, since the dustproof pipe is made of elastic material, the free end 1 is movably arranged on the oil storage cylinder 6, so that the free end 1 of the dustproof pipe can be turned outward at any time to observe whether the shock absorber has defects such as oil leakage, and leakage can be detected more conveniently and intuitively.

Claims

1. A dust guard tube characterized by, The dustproof pipe for a shock absorber comprises a dustproof pipe body provided with a through central hole for passing through an oil storage cylinder of the shock absorber and a dust cover axially movably connected with the oil storage cylinder, and the dustproof pipe body comprises, in sequence: a free end for being movably arranged on the oil storage cylinder along an axial direction of the oil storage cylinder; an extension section folded in a corrugated shape along an axial direction of the dustproof pipe body, an edge of the free end being transitioned in a streamlined manner to a nearest wave crest; a fixed section with an inner wall provided with a limiting structure extending to an axial line of the dustproof pipe body, the limiting structure being used for abutting against an end surface of the dust cover, and the fixed section being used for being fixed to the dust cover.

2. The dust guard tube of claim 1, wherein The limiting structure comprises a first annular protruding part extending radially to the axial line of the dustproof pipe body.

3. The dust guard tube of claim 1, wherein, The free end is provided with a rounded corner used for contacting the oil storage cylinder.

4. The dust guard tube of claim 1, wherein, A clamping groove is formed along an outer wall of the fixed section, and the clamping groove is used for cooperating with a throat ring to fix the dustproof pipe body to the dust cover.

5. The dust guard tube of claim 1, wherein, An end of the fixed section away from the extension section is provided with a second annular protruding part extending radially to the axial line of the dustproof pipe body, and the second annular protruding part is used for interference fit with the dust cover.

6. The dust guard tube of claim 1, wherein, The material of the dustproof pipe body comprises ethylene propylene diene rubber.

7. A shock absorber comprising an oil reservoir cylinder and a dust boot, the dust boot being movably sleeved on one end of the oil reservoir cylinder in the axial direction of the oil reservoir cylinder; characterized in that, The dustproof pipe further comprises the dustproof pipe body, the free end of the dustproof pipe body is movably arranged on the oil storage cylinder along an axial direction of the oil storage cylinder, and the fixed section of the dustproof pipe body is fixed to the dust cover.

8. The damper of claim 7, wherein The dustproof pipe further comprises a wear-resistant ring fixedly sleeved on the oil storage cylinder, and the wear-resistant ring is used for contacting the free end of the dustproof pipe body.

9. The damper of claim 8, wherein The wear-resistant ring comprises: a sleeve provided with a plurality of through holes on a sleeve wall of the sleeve; the sleeve is sleeved on an outer side wall of the oil storage cylinder, and the sleeve is fixed relative to the oil storage cylinder in a circumferential direction; the second end of the dustproof pipe is arranged on the sleeve; and the dustproof pipe is movable up and down relative to the sleeve under an external force to controllably cover the through holes.

10. The damper of claim 7, wherein The free end of the dustproof pipe body is interference fit with the oil storage cylinder.

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