External corrugated pipe and rail transit oil damper

Abstract

The utility model discloses an external corrugated pipe and rail transit oil damper, the external corrugated pipe body comprises a corrugated pipe part, a first mounting pipe part and a second mounting pipe part, the first mounting pipe part and the second mounting pipe part are respectively connected with the two ends of the corrugated pipe part, the first mounting pipe part is sleeved on the outer wall of an oil storage cylinder, and the second mounting pipe part is sleeved on the outer wall of the oil storage cylinder. The second mounting pipe part is arranged on the outer wall of the dust cover in a sleeving mode, the first mounting pipe part is provided with a breathing groove communicated with an inner cavity of the external corrugated pipe body, the groove bottom of the breathing groove extends to the corrugated pipe part, and a groove opening of the breathing groove penetrates through the end, away from the corrugated pipe part, of the first mounting pipe part. Compared with the prior art, the first mounting pipe part is provided with the breathing groove, maintenance personnel directly observe the rail transit oil damper in the external corrugated pipe through the breathing groove, the working efficiency of daily inspection and regular inspection is remarkably improved, meanwhile, accumulated water permeating into the inner cavity of the external corrugated pipe can be discharged through the breathing groove, and the service life of the external corrugated pipe is prolonged. And good working performance and service life of the rail transit oil damper are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic components, in particular to an external bellows and a rail transit oil pressure shock absorber. Background Art

[0002] Hydraulic shock absorbers are key components on rail vehicles, and their performance and component condition are directly related to ride comfort and safety. The existing dust-proof structure for hydraulic shock absorbers involves installing a dust ring or a skeleton oil seal with dust-proof function on the guide cover unit, and then installing a bellows on the outside of the hydraulic shock absorber to prevent dust. However, this dust-proof structure not only prevents direct observation of the shock absorber's interior, hindering routine inspections and regular inspections of the hydraulic shock absorber, but also fails to drain condensation in spring and autumn, or rainwater that occasionally seeps into the space between the bellows dust shield and the hydraulic shock absorber. Prolonged water accumulation can cause paint peeling and rusting inside the shock absorber, further impacting performance and service life.

[0003] Therefore, how to improve the convenience of daily inspection of hydraulic shock absorbers and drain the accumulated water at the same time is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0004] The purpose of the present utility model is to provide an external bellows and a rail transit oil pressure shock absorber. The external bellows of the present utility model is used to improve the convenience of daily inspection of the rail transit oil pressure shock absorber and can discharge accumulated water at the same time.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] An external bellows is provided in a rail transit hydraulic shock absorber, the external bellows comprising an external bellows body, the external bellows body being provided with a through center hole, the center hole being used to pass through an oil storage cylinder of the rail transit hydraulic shock absorber and a dust cover axially movably connected to the oil storage cylinder, the external bellows body comprising:

[0007] A bellows portion, a first mounting pipe portion and a second mounting pipe portion, the first mounting pipe portion and the second mounting pipe portion are respectively connected to the two ends of the bellows portion, the first mounting pipe portion is sleeved on the outer wall of the oil storage cylinder, the second mounting pipe portion is sleeved on the outer wall of the dust cover, and the first mounting pipe portion is provided with a breathing groove connected to the inner cavity of the external bellows body, the bottom of the breathing groove extends to the bellows portion, and the notch of the breathing groove passes through one end of the first mounting pipe portion away from the bellows portion.

[0008] Optionally, in the above-mentioned external bellows, the second mounting pipe portion is provided with the breathing groove, and the bottom of the breathing groove extends to the bellows portion, and the notch of the breathing groove extends away from the bellows portion and passes through the edge of the second mounting pipe portion.

[0009] Optionally, in the above-mentioned external corrugated pipe, a plurality of breathing grooves are provided, and the breathing grooves are evenly distributed on the first mounting pipe portion.

[0010] Optionally, in the above-mentioned external bellows, the outer wall of the bellows portion is set to a smooth streamline shape, and the bellows portion has elastic deformation along the axial extension direction of the external bellows body, so that the bellows portion can be extended or shortened.

[0011] Optionally, in the above-mentioned external corrugated pipe, both the first mounting pipe portion and the second mounting pipe portion are provided with a slot for connecting a throat clamp.

[0012] Optionally, in the above-mentioned external bellows, the bellows portion and the first mounting pipe portion, as well as the bellows portion and the second mounting pipe portion are all connected in a smooth transition.

[0013] Optionally, in the above-mentioned external bellows, the external bellows body is an integrated structure.

[0014] Optionally, in the above-mentioned external bellows, the material of the external bellows body is EPDM rubber.

[0015] The utility model provides an external bellows, in which the first mounting pipe portion and the second mounting pipe portion in the external bellows body are respectively connected to the two ends of the bellows portion, the first mounting pipe portion is sleeved on the outer wall of the oil storage cylinder, and the second mounting pipe portion is sleeved on the outer wall of the dust cover, and the first mounting pipe portion is provided with a breathing groove, which is connected to the inner cavity of the external bellows body, and the bottom of the breathing groove extends to the bellows portion, and the notch of the breathing groove passes through the end of the first mounting pipe portion away from the bellows portion. Compared with the prior art, the first mounting pipe portion at the oil storage cylinder end of the external bellows provided by the utility model is provided with a breathing groove, so that maintenance personnel can directly observe the rail transit oil pressure shock absorber in the external bellows through the breathing groove to complete daily inspections and regular inspections of the rail transit oil pressure shock absorber, which greatly improves the convenience of detecting the rail transit oil pressure shock absorber and significantly improves the work efficiency of daily inspections and regular inspections. At the same time, the accumulated water that seeps into the inner cavity of the external bellows can be discharged through the breathing groove, avoiding the problem of paint peeling and rusting inside the rail transit oil pressure shock absorber caused by long-term water accumulation, and ensuring that the rail transit oil pressure shock absorber has good working performance and service life.

[0016] The present invention also provides a rail transit hydraulic 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, and includes an external bellows as described in any of the above items, the first mounting tube portion of the external bellows is sleeved on the outer wall of the oil storage cylinder, and the second mounting tube portion is sleeved on the outer wall of the dust cover.

[0017] The rail transit hydraulic shock absorber provided by the present invention has all the technical effects of the external bellows as it has the external bellows, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 This is a schematic diagram of the structure of the external bellows disclosed in an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the rail transit oil pressure shock absorber disclosed in the embodiment of the utility model

[0021] Reference numerals:

[0022] 100 is the external bellows body, 110 is the bellows portion, 120 is the first mounting pipe portion, 130 is the second mounting pipe portion, 140 is the breathing groove, and 150 is the card slot;

[0023] 10 is a rail transit oil pressure shock absorber, 11 is an oil storage cylinder, and 12 is a dust cover. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The core of this utility model is to provide an external bellows to improve the convenience of daily inspection of rail transit oil pressure shock absorbers and to drain accumulated water at the same time;

[0030] Another core of the present invention is to provide a rail transit hydraulic shock absorber with the above-mentioned external bellows.

[0031] like Figure 1As shown, an embodiment of the present utility model discloses an external bellows, which is arranged in a rail transit hydraulic shock absorber 10. The external bellows includes an external bellows body 100. The external bellows body 100 is provided with a through center hole. The center hole is used to pass through the oil storage cylinder 11 of the rail transit hydraulic shock absorber 10 and the dust cover 12 axially movably connected to the oil storage cylinder 11. The external bellows body 100 includes a bellows portion 110, a first mounting pipe portion 120 and a second mounting pipe portion 130. Among them, the first mounting pipe portion 120 and the second mounting pipe portion 130 are respectively connected to the two ends of the bellows portion 110. When the external bellows body 100 is installed on the rail transit oil pressure shock absorber 10, the first mounting pipe portion 120 is sleeved on the outer wall of the oil storage cylinder 11, and the second mounting pipe portion 130 is sleeved on the outer wall of the dust cover 12. A breathing groove 140 is opened in the first mounting pipe portion 120, and the breathing groove 140 is connected to the inner cavity of the external bellows body 100, and the bottom of the breathing groove 140 extends to the bellows portion 110, and the notch of the breathing groove 140 passes through the first mounting pipe portion 120 away from the bellows portion One end of 110, and then the maintenance personnel can directly observe the rail transit oil pressure shock absorber 10 in the external bellows through the breathing groove 140 to complete the daily inspection and regular inspection of the rail transit oil pressure shock absorber 10, which greatly facilitates the inspection of the rail transit oil pressure shock absorber 10 and significantly improves the work efficiency of daily inspection and regular inspection. At the same time, the accumulated water that penetrates into the inner cavity of the external bellows can be discharged through the breathing groove 140, avoiding the problem of paint peeling and rusting inside the rail transit oil pressure shock absorber 10 caused by long-term water accumulation, and ensuring that the rail transit oil pressure shock absorber 10 has good working performance and service life.

[0032] In a specific embodiment, the second mounting pipe portion 130 is also provided with a breathing groove 140, and the bottom of the breathing groove 140 also extends toward the direction of the bellows portion 110. The notch of the breathing groove 140 is away from the bellows portion 110 and passes through the edge of the end of the second mounting pipe portion 130 away from the bellows portion 110. In this way, the breathing groove 140 is provided in the second mounting pipe portion 130 to increase the observation of the rail transit hydraulic shock absorber 10 in multiple directions, thereby improving the daily inspection and regular inspection of the rail transit hydraulic shock absorber 10 and more comprehensively detecting the rail transit hydraulic shock absorber 10.

[0033] Furthermore, a plurality of breathing grooves 140 can be provided, each of which is evenly spaced on the first mounting tube portion 120. Multiple breathing grooves 140 allow for direct observation and inspection of multiple locations of the rail transit hydraulic shock absorber 10. Furthermore, multiple breathing grooves 140 facilitate rapid drainage of accumulated water. Of course, the second mounting tube portion 130 can also include multiple breathing grooves 140, each spaced apart on the second mounting tube portion 130.

[0034] During the travel of the rail vehicle, taking into account the high wind resistance of the transversely installed oil pressure shock absorber, the outer wall of the bellows portion 110 is set to a smooth streamlined shape, so that the air fluid flows quickly on the streamlined surface, reducing the air resistance on the windward surface of the oil pressure shock absorber, thereby reducing the fluctuation of the external bellows body 100 caused by the airflow, and improving the stress condition of the external bellows body 100 during the reciprocating motion, greatly improving the service life of the external bellows. At the same time, the bellows portion 110 has elastic deformation along the axial extension direction of the external bellows body 100, so that the bellows portion 110 can be stretched or shortened to adapt to the stretching, extension or contraction and folding of the oil pressure shock absorber. In a specific embodiment, the bellows portion 110 is provided with a folded corrugated structure along the extension direction of the external bellows body 100 to achieve stretching or folding and contraction.

[0035] like Figure 1 As shown, the first mounting pipe portion 120 and the second mounting pipe portion 130 are both provided with a card slot 150. After the first mounting pipe portion 120 and the second mounting pipe portion 130 are respectively sleeved on the oil storage cylinder 11 and the dust cover 12, the throat clamp is installed into the card slot 150, and the first mounting pipe portion 120 and the second mounting pipe portion 130 are fixed to the oil storage cylinder 11 and the dust cover 12 through the throat clamp, ensuring that the first mounting pipe portion 120 and the oil storage cylinder 11, as well as the second mounting pipe portion 130 and the dust cover 12 have good connection stability.

[0036] like Figure 1 As shown, the inner diameter of the bellows portion 110 is larger than the inner diameter of the first mounting tube portion 120 and the inner diameter of the second mounting tube portion 130. During the relative movement of the dust cover 12 and the oil storage cylinder 11, the mutual interference and friction between the inner wall of the bellows portion 110 and the rail transit hydraulic shock absorber 10 are reduced, and the friction damage to the bellows portion 110 is reduced. At the same time, the bellows portion 110 and the first mounting tube portion 120, as well as the bellows portion 110 and the second mounting tube portion 130 are all smoothly transitioned, thereby improving the smoothness of the airflow flowing on the surface of the external bellows body 100, reducing air resistance, further improving the stress condition of the external bellows body 100, and increasing its service life.

[0037] The external bellows body 100 provided in this embodiment is an integrally injection-molded structure, which enhances overall structural strength, reduces the risk of damage to the external bellows body 100 during operation, and increases the service life of the external bellows body 100. Furthermore, the material of the external bellows body 100 can be EPDM rubber, which exhibits a self-lubricating effect. As the first mounting tube portion 120 of the external bellows body 100 slides on the oil reservoir 11, the self-lubricating EPDM rubber rapidly, continuously, and evenly maintains lubrication even as the base lubricant is continuously consumed. This ensures sustained low friction during dynamic operation, avoids dry friction, and prevents excessive friction between the external bellows body 100 and the oil reservoir 11, which could damage the oil reservoir 11 and damage the paint on the oil reservoir 11. Furthermore, the lubricant continuously released from the self-lubricating EPDM rubber enhances gas exchange at the free end. Moreover, the windward surface of EPDM rubber, which can continuously release lubricant, is relatively smooth. The smooth windward surface reduces the friction resistance caused by shear stress, further reduces air resistance, and can better resist the impact of wind and sand to reduce the breakage rate.

[0038] like Figure 2 As shown, the embodiment of the present invention further discloses a rail transit hydraulic shock absorber 10, comprising an oil reservoir 11, a dust cover 12, and the aforementioned external bellows. The dust cover 12 is movably sleeved on one end of the oil reservoir 11 along the axial direction of the oil reservoir 11. The first mounting tube portion 120 of the external bellows is sleeved on the outer wall of the oil reservoir 11, and the second mounting tube portion 130 is sleeved on the outer wall of the dust cover 12. Since the rail transit hydraulic shock absorber 10 includes the aforementioned external bellows, it has all the technical effects of the aforementioned external bellows, which will not be further described herein.

[0039] 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.

[0040] 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. An external bellows, characterized in that: The external bellows is provided on a rail transit hydraulic shock absorber, and includes an external bellows body. The external bellows body is provided with a through center hole, and the center hole is used to pass through the oil storage cylinder of the rail transit hydraulic shock absorber and a dust cover axially movably connected to the oil storage cylinder. The external bellows body includes: A bellows portion, a first mounting pipe portion and a second mounting pipe portion, the first mounting pipe portion and the second mounting pipe portion are respectively connected to the two ends of the bellows portion, the first mounting pipe portion is sleeved on the outer wall of the oil storage cylinder, the second mounting pipe portion is sleeved on the outer wall of the dust cover, and the first mounting pipe portion is provided with a breathing groove connected to the inner cavity of the external bellows body, the bottom of the breathing groove extends to the bellows portion, and the notch of the breathing groove passes through one end of the first mounting pipe portion away from the bellows portion.

2. The external bellows according to claim 1, characterized in that: The second mounting pipe portion is provided with the breathing groove, and the bottom of the breathing groove extends to the corrugated pipe portion. The notch of the breathing groove extends away from the corrugated pipe portion and passes through the edge of the second mounting pipe portion.

3. The external bellows according to claim 1, characterized in that: A plurality of breathing grooves are provided, and the breathing grooves are evenly distributed on the first mounting pipe portion.

4. The external bellows according to claim 1, characterized in that: The outer wall of the bellows portion is configured to be a smooth streamline shape, and the bellows portion has elastic deformation along the axial extension direction of the external bellows body, so that the bellows portion can be extended or shortened.

5. The external bellows according to claim 1, characterized in that: The first mounting pipe portion and the second mounting pipe portion are both provided with a slot for connecting a throat clamp.

6. The external bellows according to claim 1, characterized in that: The bellows portion and the first mounting pipe portion, as well as the bellows portion and the second mounting pipe portion are all connected in a smooth transition.

7. The external bellows according to any one of claims 1 to 6, characterized in that: The external bellows body is an integrated structure.

8. The external bellows according to claim 7, characterized in that: The material of the external bellows body is EPDM rubber.

9. A rail transit hydraulic 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 comprises the external bellows according to any one of claims 1 to 8, wherein the first mounting pipe portion of the external bellows is sleeved on the outer wall of the oil storage cylinder, and the second mounting pipe portion is sleeved on the outer wall of the dust cover.

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