A cylinder liner structure facilitating replacement of a dust seal

Abstract

The utility model discloses a cylinder sleeve structure convenient to replace dustproof ring, including guide sleeve, cylinder and piston rod, guide sleeve and cylinder are connected through the thread rotation, and guide sleeve is set up on the piston rod, and the dustproof ring extrusion seat is connected through the thread rotation at the outside port place of guide sleeve, is equipped with the notch at the outside port place of guide sleeve, and the dustproof ring extrusion seat is placed in the notch, and the junction of notch and guide sleeve is equipped with the limit slot, and the inner dustproof ring is equipped in the notch and the dustproof ring extrusion seat, and the outside dustproof ring is equipped at the outside port place of dustproof ring extrusion seat. The utility model discloses through secondary dustproof structure to improve dustproof effect, can make the inner dustproof ring realize dynamic shift through extrusion structure to reduce the frequency of inner dustproof ring replacement.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder manufacturing, and in particular to a cylinder liner structure that facilitates the replacement of dust seals. Background Technology

[0002] Hydraulic cylinders, as actuators in hydraulic systems, are widely used in engineering machinery, industrial equipment, and other fields. Dust seals are important components of hydraulic cylinders, primarily used to prevent dust, impurities, and other foreign objects from entering the cylinder's interior, avoiding wear on components such as the cylinder barrel and piston rod, and ensuring the normal operation of the hydraulic cylinder.

[0003] Currently, the dust seals of traditional hydraulic cylinders are usually installed in the end groove of the cylinder barrel. When replacing them, the entire hydraulic cylinder needs to be disassembled, and even other connected components need to be removed. The operation is cumbersome, time-consuming, labor-intensive, and inefficient. At the same time, the dust seals do not have an adaptive adjustment function. Once the dust seals are worn, they can only be replaced, which increases the replacement frequency and operating costs. Utility Model Content

[0004] The purpose of this invention is to provide a highly efficient cylinder liner structure that facilitates the replacement of dust seals.

[0005] The purpose of this utility model is achieved as follows: a cylinder liner structure that facilitates the replacement of dust seals includes a guide sleeve, a cylinder body, and a piston rod; the guide sleeve and the cylinder body are connected by a threaded rotation, the guide sleeve is sleeved on the piston rod, a dust seal compression seat is connected to the outer port of the guide sleeve by a threaded rotation, a notch is provided at the outer port of the guide sleeve, the dust seal compression seat is placed in the notch, a limiting groove is provided at the junction of the notch and the guide sleeve, an inner dust seal is provided in the notch and the dust seal compression seat, and an outer dust seal is provided at the outer port of the dust seal compression seat.

[0006] Preferably, the inner dustproof ring has a through-hole in the middle and an outer diameter surface with a conical structure that is smaller on the outside and larger on the inside; the inner side of the inner dustproof ring is provided with an annular limiting protrusion, which is embedded and cooperates with the limiting groove.

[0007] Preferably, the inner diameter surface of the guide sleeve is configured as a tapered structure with a smaller outer diameter and a larger inner diameter, and the inner diameter surface of the guide sleeve slides and presses against the outer diameter surface of the inner dustproof ring.

[0008] Preferably, after the dustproof ring compression seat and the inner dustproof ring are initially fitted, the inner end face of the dustproof ring compression seat does not contact the bottom of the notch and leaves a gap.

[0009] Preferably, when the dust ring compression seat is rotated to the bottom of the notch, the main body of the dust ring compression seat is exposed outside the notch.

[0010] Compared with the prior art, the advantages of this utility model are:

[0011] 1. By setting a detachable dust seal compression seat, the dust seal can be replaced without disassembling the hydraulic cylinder and other connected components, which greatly simplifies the replacement process, improves replacement efficiency, and reduces equipment maintenance costs.

[0012] 2. By rotating the dustproof ring compression seat, the internal dustproof ring can be compressed. After the dustproof ring wears out, it can be compressed to ensure that it always keeps in contact with the piston rod, thereby improving the sealing performance and dustproof effect.

[0013] 3. A detachable outer dustproof ring is provided on the outside of the guide sleeve, which together with the inner dustproof ring forms a secondary dustproof structure to further improve dustproof performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] The components include: 1 guide sleeve, 101 notch, 102 limiting groove, 2 cylinder body, 3 piston rod, 4 dustproof ring extrusion seat, 5 inner dustproof ring, 501 annular limiting protrusion, and 6 outer dustproof ring. Detailed Implementation

[0016] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0017] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply 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.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1 As shown, a cylinder liner structure that facilitates the replacement of dust seals includes a guide sleeve 1, a cylinder body 2, and a piston rod 3. The guide sleeve 1 and the cylinder body 2 are connected by a threaded rotation. The guide sleeve 1 is fitted onto the piston rod 3. A dust seal compression seat 4 is connected by a threaded rotation at the outer port of the guide sleeve 1. A notch 101 is provided at the outer port of the guide sleeve 1. The dust seal compression seat 4 is placed in the notch 101. A limiting groove 102 is provided at the junction of the notch 101 and the guide sleeve 1. An inner dust seal 5 is provided inside the notch 101 and inside the dust seal compression seat 4. An outer dust seal 6 is provided at the outer port of the dust seal compression seat 4.

[0020] The inner dustproof ring 5 is through the middle and has a tapered structure with a smaller outer diameter and a larger inner diameter. The inner side of the inner dustproof ring 5 is provided with an annular limiting protrusion 501. The annular limiting protrusion 501 is embedded and engaged with the limiting groove 102 to ensure that the inner dustproof ring will not fall off and will always be in a meshing state.

[0021] The inner diameter surface of the guide sleeve 1 is set as a tapered structure with a smaller outer diameter and a larger inner diameter. The inner diameter surface of the guide sleeve 1 slides and presses against the outer diameter surface of the inner dustproof ring 5. The inner dustproof ring can be pressed and moved towards the piston rod side through the two sets of tapered structures, thereby improving the sealing performance between the inner dustproof ring and the piston rod.

[0022] After the dust ring compression seat 4 and the inner dust ring 5 are initially fitted, the inner end face of the dust ring compression seat 4 does not contact the bottom of the notch 101 and leaves a gap, ensuring that the dust ring compression seat has room to rotate, and can further compress the inner dust ring, achieving dynamic compensation when the inner dust ring is worn, and reducing the replacement frequency of the inner dust ring.

[0023] When the dust ring compression seat 4 is rotated to the bottom of the notch 101, the main body of the dust ring compression seat 4 is exposed outside the notch 101. The dust ring compression seat exposed outside the notch can be set in the shape of a nut, which makes it easy to rotate the dust ring compression seat with tools later and facilitate the replacement of the internal dust ring.

[0024] The working principle of this utility model is explained as follows: During assembly, the inner dustproof ring is first embedded, and then the dustproof ring compression seat is fitted in. The dustproof ring compression seat rotates and engages with the cylinder body, which can limit the inner dustproof ring. At the same time, when the inner dustproof ring wears, the inner dustproof ring is compressed by rotating the dustproof ring compression seat, so that it always contacts the piston rod surface. There is no need to disassemble the inner dustproof ring, reducing the frequency of disassembly. Meanwhile, the outer dustproof ring set on the outside of the dustproof ring compression seat and the inner dustproof ring achieve double sealing, improving the dustproof effect.

[0025] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A cylinder liner structure that facilitates the replacement of dust seals, characterized in that, The device includes a guide sleeve, a cylinder body, and a piston rod. The guide sleeve and the cylinder body are connected by a threaded rotation. The guide sleeve is fitted onto the piston rod. A dustproof ring compression seat is connected to the outer port of the guide sleeve by a threaded rotation. A notch is provided at the outer port of the guide sleeve. The dustproof ring compression seat is placed in the notch. A limiting groove is provided at the junction of the notch and the guide sleeve. An inner dustproof ring is provided inside the notch and inside the dustproof ring compression seat. An outer dustproof ring is provided at the outer port of the dustproof ring compression seat.

2. The cylinder liner structure for easy replacement of the dust seal ring according to claim 1, characterized in that, The inner dustproof ring is through the middle and has a tapered structure with a smaller outer diameter and a larger inner diameter. The inner side of the inner dustproof ring is provided with an annular limiting protrusion, which is embedded and cooperates with the limiting groove.

3. The cylinder liner structure for easy replacement of the dust seal ring according to claim 1, characterized in that, The inner diameter surface of the guide sleeve is set as a tapered structure with a smaller outer diameter and a larger inner diameter, and the inner diameter surface of the guide sleeve slides and presses against the outer diameter surface of the inner dustproof ring.

4. The cylinder liner structure for easy replacement of the dust seal ring according to claim 1, characterized in that, After the dustproof ring compression seat and the inner dustproof ring are initially fitted together, the inner end face of the dustproof ring compression seat does not contact the bottom of the notch and leaves a gap.

5. A cylinder liner structure for easy replacement of dust seals according to claim 1, characterized in that, When the dustproof ring compression seat is rotated to the bottom of the notch, the main body of the dustproof ring compression seat is exposed outside the notch.

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