Oil cylinder dustproof structure with high sealing performance

Abstract

The utility model discloses an oil cylinder dustproof structure with high sealing performance in the field of oil cylinders, which is characterized by comprising a cylinder body and a piston rod arranged in the cylinder body, the cylinder body is of a barrel structure with an opening in one end, a guide sleeve is arranged at the opening of the cylinder body, a first turning groove, a second turning groove and a third turning groove are formed in the inner wall of the opening in the outer side of the guide sleeve, a gland is arranged in the first turning groove, and the gland is connected with the guide sleeve through a bolt; a dustproof ring is arranged in the second turning groove, the section of the dustproof ring is in a protruding shape, the dustproof ring is composed of a main sealing part and an auxiliary sealing part, the auxiliary sealing part and the main sealing part are integrally connected, a protrusion is arranged on the outer side of the auxiliary sealing part, a gap is reserved between the protrusion and the main sealing part, and an annular spring is arranged between the protrusion and the main sealing part. According to the utility model, the detachable gland is adopted, so that the replacement efficiency is greatly improved; meanwhile, the spring can achieve abrasion compensation, the dustproof ring abuts against the piston rod all the time, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of oil cylinder sealing, in particular to an oil cylinder dustproof structure with high sealing performance. Background Art

[0002] As the use time increases, the dust ring of the oil cylinder will gradually wear and age, and lose its original dust-proof effect. This will cause the oil cylinder to be invaded by dust, sand and other impurities, accelerate the wear of the oil cylinder, and shorten the service life of the equipment.

[0003] The current dust ring adopts an embedded installation structure, which is difficult to remove and has low disassembly and assembly efficiency. At the same time, the dust ring is made of rubber and has no compensation structure after wear. The gap between the dust ring and the piston rod cannot be compensated, and the sealing cannot be further guaranteed. Utility Model Content

[0004] The utility model aims to provide a high-sealing oil cylinder dustproof structure which has good dustproof effect and is easy to replace.

[0005] The purpose of the utility model is achieved as follows: a high-sealing oil cylinder dustproof structure, comprising a cylinder body and a piston rod placed in the cylinder body; the cylinder body is a cylindrical structure with an opening at one end, a guide sleeve is provided at the opening of the cylinder body, a first turning groove, a second turning groove, and a third turning groove are provided on the inner wall of the outer opening of the guide sleeve, a pressure cover is provided in the first turning groove, and the pressure cover is connected to the guide sleeve by bolts; a dustproof ring is provided in the second turning groove, the cross-section of the dustproof ring is a convex shape, the dustproof ring is composed of a main sealing part and a secondary sealing part, the secondary sealing part is integrally connected to the main sealing part, a protrusion is provided on the outer side of the secondary sealing part, a gap is left between the protrusion and the main sealing part, and an annular spring is provided.

[0006] Preferably, the pressure cover is annular and is provided with three groups of grooves, one group of which is located on the outside of the pressure cover, and two groups of which are located on the bottom side of the pressure cover; after the pressure cover is connected to the guide sleeve by bolts, the two groups of grooves located on the bottom side of the pressure cover are respectively located on both sides of the groove wall of the second turning groove; O-rings are provided in the grooves.

[0007] Preferably, the width of the secondary sealing portion is smaller than the width of the third turning groove; and the height of the primary sealing portion is greater than the height of the groove wall of the second turning groove.

[0008] Preferably, a limiting groove is provided on the inner side of the secondary sealing portion, and the annular spring is placed in the limiting groove.

[0009] Preferably, guide portions are provided on both sides of the inner diameter surface of the secondary sealing portion.

[0010] Compared with the prior art, the utility model is beneficial in that:

[0011] 1. The dust ring is compressed by a detachable gland, which makes it more convenient to replace the dust ring than the built-in clip-in type, and the replacement efficiency is greatly improved;

[0012] 2. The dust ring is optimized to be the main sealing part and the auxiliary sealing part, and an annular spring is set to wrap the auxiliary sealing part, so that after the dust ring is worn out after long-term use, the spring can achieve wear compensation, and the dust ring is always in contact with the piston rod to improve the sealing effect;

[0013] 3. Set multiple groups of O-rings on the gland to improve the sealing between the gland and the dust ring to prevent dust from entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the dustproof ring of the utility model.

[0016] Among them, 1 cylinder body, 2 piston rod, 3 guide sleeve, 301 first turning groove, 302 second turning groove, 303 third turning groove, 4 pressure cover, 401 groove, 5 dust ring, 501 main sealing part, 502 secondary sealing part, 5021 protrusion, 5022 limiting groove, 5023 guide part, 6 annular spring, 7 O-ring. DETAILED DESCRIPTION

[0017] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0018] It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 1-2 As shown, a high-sealing oil cylinder dustproof structure comprises a cylinder body 1 and a piston rod 2 placed in the cylinder body 1; the cylinder body 1 is a cylindrical structure with an opening at one end, a guide sleeve 3 is provided at the opening of the cylinder body 1, a first turning groove 301, a second turning groove 302, and a third turning groove 303 are provided on the inner wall of the outer opening of the guide sleeve 3, a pressure cover 4 is provided in the first turning groove 301, and the pressure cover 4 is connected to the guide sleeve 3 by bolts; a dust ring 5 is provided in the second turning groove 302, the cross-section of the dust ring 5 is convex, the dust ring 5 is composed of a main sealing part 501 and a secondary sealing part 502, the secondary sealing part 502 is integrally connected with the main sealing part 501, a protrusion 5021 is provided on the outer side of the secondary sealing part 502, a gap is left between the protrusion 5021 and the main sealing part 501, and an annular spring 6 is provided, the main sealing part and the secondary sealing part can form a triple seal between the dust ring and the piston rod, thereby greatly improving the sealing performance.

[0021] like Figure 2 As shown, the gland 4 is annular and is provided with three groups of grooves 401, one group of which is located on the outside of the gland, and two groups of which are located on the bottom side of the gland; after the gland is connected to the guide sleeve by bolts, the two groups of grooves 401 located on the bottom side of the gland are respectively located on both sides of the groove wall of the second turning groove; O-rings 7 are provided in the grooves, and the O-rings are used to ensure the sealing between the side of the gland and the side of the first turning groove, the bottom of the gland and the bottom of the first turning groove, and the bottom of the gland and the dust ring.

[0022] like Figure 2 As shown, the width of the secondary sealing portion 502 is smaller than the width of the third turning groove 303; the height of the main sealing portion 501 is slightly larger than the groove wall height of the second turning groove 302, and the width and height of each turning groove are limited to facilitate the placement of the dust ring and avoid the situation where the dust ring cannot be installed. The main sealing portion can slightly protrude from the second turning groove to facilitate extrusion with the pressure cover and improve the sealing.

[0023] like Figure 2 As shown, a limiting groove 5022 is provided inside the secondary sealing portion 502, and the annular spring 6 is placed in the limiting groove 5021. The annular spring can tightly wrap the dust ring around the outside of the piston rod through its own restoring force, and the limiting groove can prevent the spring from being displaced.

[0024] like Figure 2 As shown, guide portions 5023 are provided on both sides of the inner diameter surface of the secondary sealing portion 502, and the guide portions 5023 are chamfered. When the dust ring is inserted, it is convenient to squeeze the dust ring and the piston rod, which can improve the insertion efficiency.

[0025] The working principle of the utility model is as follows: after the guide sleeve and the piston rod are installed, the dust ring is inserted into the outside of the piston rod. At this time, the dust ring is not inserted into the gland. At this time, the annular spring is inserted into the secondary sealing part of the dust ring, and then the dust ring is pushed into the guide sleeve. The guide part can facilitate the insertion of the dust ring; then the dust ring is compressed by the gland. The utility model has a novel structure, the annular spring can achieve elastic compensation, and achieve high sealing performance. At the same time, the gland is detachable and easy to replace.

[0026] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents of the present invention for protection have been fully recorded in the claims.

Claims

1. A highly sealed oil cylinder dustproof structure, characterized in that: It includes a cylinder body and a piston rod placed in the cylinder body; the cylinder body is a cylindrical structure with an opening at one end, a guide sleeve is provided at the opening of the cylinder body, a first turning groove, a second turning groove and a third turning groove are provided on the inner wall of the outer opening of the guide sleeve, a pressure cover is provided in the first turning groove, and the pressure cover is connected to the guide sleeve by bolts; a dust ring is provided in the second turning groove, the cross-section of the dust ring is a convex shape, the dust ring is composed of a main sealing part and a secondary sealing part, the secondary sealing part is integrally connected to the main sealing part, a protrusion is provided on the outer side of the secondary sealing part, a gap is left between the protrusion and the main sealing part, and an annular spring is provided.

2. The high-sealing oil cylinder dustproof structure according to claim 1 is characterized in that: The pressure cover is annular and is provided with three groups of grooves, one group of which is located on the outside of the pressure cover, and two groups of which are located on the bottom side of the pressure cover; after the pressure cover and the guide sleeve are connected by bolts, the two groups of grooves located on the bottom side of the pressure cover are respectively located on both sides of the groove wall of the second turning groove; O-rings are provided in the grooves.

3. The high-sealing oil cylinder dustproof structure according to claim 1 is characterized in that: The width of the secondary sealing portion is smaller than the width of the third turning groove; the height of the primary sealing portion is greater than the height of the groove wall of the second turning groove.

4. The high-sealing oil cylinder dustproof structure according to claim 1, characterized in that: A limiting groove is arranged inside the secondary sealing portion, and the annular spring is placed in the limiting groove.

5. The high-sealing oil cylinder dustproof structure according to claim 1 is characterized in that: Guide parts are arranged on both sides of the inner diameter surface of the secondary sealing part.

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