Piston sealing ring leading-in device

Abstract

The utility model discloses a piston sealing ring leading-in device which comprises a piston positioning seat, a guide sleeve and a press-in sleeve, a lower positioning groove used for containing the lower portion of a piston is formed in the piston positioning seat, an upper positioning groove used for containing the upper portion of the piston is formed in the guide sleeve, and a guide sleeve containing cavity matched with the guide sleeve is formed in the press-in sleeve. When the guide sleeve is covered with the press-in sleeve, the inner wall face of the guide sleeve containing cavity is attached to the outer wall face of the guide sleeve. Through the matching among the piston positioning seat, the guide sleeve and the press-in sleeve, the sealing ring can be quickly pressed into the ring groove of the piston, the structure is ingenious, the use is convenient, and the sealing ring is efficiently mounted in a labor-saving manner.

Description

Technical Field

[0001] The utility model relates to the technical field of piston sealing ring assembly, in particular to a piston sealing ring introduction device. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). A hydraulic cylinder is basically composed of a cylinder barrel, a cylinder head, a piston, a piston rod, a sealing device, a buffer device, and an exhaust device. The piston and cylinder barrel are usually sealed with an O-ring.

[0003] At present, the sealing ring on the piston is usually pressed into the ring groove of the piston by hand. The specific methods are usually as follows: (1) Use a rope passed through the sealing ring to slowly pull the sealing ring down into the ring groove of the piston. This method is likely to cause the sealing ring to be subjected to concentrated force for a long time, resulting in permanent deformation of the sealing ring, affecting the sealing effect, and the installation efficiency is low, time-consuming and labor-intensive; (2) Use a smooth crowbar to slowly pry the sealing ring into the ring groove of the piston. This method is likely to scratch the outer surface of the piston or the sealing ring, affecting the sealing effect, and the installation efficiency is low, time-consuming and labor-intensive. Utility Model Content

[0004] The utility model aims to solve the above problems existing in the existing piston sealing ring installation method and provides a piston sealing ring introduction device which has an ingenious structure, is easy to use and can install the sealing ring efficiently and labor-savingly.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a piston sealing ring introduction device of the utility model includes a piston positioning seat, a guide sleeve and a press-in sleeve, the piston positioning seat is provided with a lower positioning groove for accommodating the lower part of the piston, the guide sleeve is provided with an upper positioning groove for accommodating the upper part of the piston, and the press-in sleeve is provided with a guide sleeve accommodating cavity adapted to the guide sleeve. When the press-in sleeve is covered on the guide sleeve, the inner wall surface of the guide sleeve accommodating cavity is in contact with the outer wall surface of the guide sleeve. In the utility model, a piston positioning seat, a guide sleeve and a press-in sleeve are used in combination. The piston positioning seat and the guide sleeve are used to fix the piston. The sealing ring is sleeved outside the guide sleeve. When in use, the lower part of the piston is placed in the lower positioning groove on the piston positioning seat to fix it (the piston will not move in the radial direction), the guide sleeve is placed on the piston so that the upper part of the piston is located in the upper positioning groove on the guide sleeve, the sealing ring is sleeved on the guide sleeve, the press-in sleeve is sleeved on the guide sleeve, the press-in sleeve is pressed downward, the opening end face of the guide sleeve accommodating cavity contacts the sealing ring and the sealing ring is pressed downward into the annular groove of the piston. The utility model has an ingenious structure, is easy to use, and can efficiently and labor-savingly install the sealing ring.

[0006] Preferably, the upper part of the guide sleeve is configured as a truncated cone structure, the lower part of the guide sleeve is configured as a cylindrical structure, and the inner wall surface of the guide sleeve accommodating cavity is in contact with the lower outer wall surface of the guide sleeve. The upper part of the guide sleeve is configured as a truncated cone structure, which plays a guiding role and facilitates the sealing ring to be sleeved on the guide sleeve; the lower part of the guide sleeve is configured as a cylindrical structure, which can keep the shape of the sealing ring stable, making it difficult for the sealing ring to deform and can be smoothly pressed into the ring groove of the piston.

[0007] Preferably, the wall of the guide sleeve accommodating cavity is provided with separating opening grooves at intervals along the circumferential direction, and the separating opening grooves separate the wall of the guide sleeve accommodating cavity into a plurality of expansion pieces, and the inner wall surface of the expansion piece is in contact with the lower outer wall surface of the guide sleeve. The wall of the guide sleeve accommodating cavity is separated into a plurality of expansion pieces by the separating opening grooves, and the expansion pieces enable the press-in sleeve to be in contact with the lower outer wall surface of the guide sleeve during the process of pressing the sealing ring.

[0008] Preferably, the groove bottom of the separating opening groove is set to be arc-shaped or circular. The groove bottom of the separating opening groove is set to be arc-shaped or circular, which can avoid stress concentration and prevent the expansion sheet from breaking.

[0009] Preferably, a spring is fixed to the top of the guide sleeve accommodating cavity, and a spring cavity is provided on the guide sleeve. When the press-in sleeve is covered on the guide sleeve, the spring is located in the spring cavity and the lower end of the spring abuts against the guide sleeve. When the press-in sleeve is covered on the guide sleeve, the lower end of the spring abuts against the guide sleeve. When the press-in sleeve is pressed down, the spring is compressed. When the press-in sleeve is released, the spring can push the press-in sleeve and the guide sleeve apart, which is conducive to the rapid separation of the guide sleeve and the press-in sleeve and improves efficiency.

[0010] Therefore, the utility model has the following beneficial effects: through the cooperation between the piston positioning seat, the guide sleeve and the press-in sleeve, the sealing ring can be quickly pressed into the ring groove of the piston, the structure is ingenious, and it is easy to use, making the installation of the sealing ring efficient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a usage state diagram of the utility model.

[0012] Figure 2 yes Figure 1 Top view of the .

[0013] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0014] Figure 4 It is an exploded view of the utility model.

[0015] In the figure: piston positioning seat 1, guide sleeve 2, press-in sleeve 3, lower positioning groove 4, upper positioning groove 5, guide sleeve accommodating chamber 6, separating opening groove 7, expansion piece 8, spring 9, spring chamber 10, piston 11, sealing ring 12. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0017] like Figure 1 , Figure 2 , Figure 3 and Figure 4 A piston sealing ring introduction device shown in the figure comprises a piston locating seat 1, a guide sleeve 2 and a press-in sleeve 3, the piston locating seat is provided with a lower locating groove 4 for accommodating the lower part of the piston, the guide sleeve is provided with an upper locating groove 5 and a spring cavity 10 for accommodating the upper part of the piston, the press-in sleeve is provided with a guide sleeve accommodating cavity 6 adapted to the guide sleeve, a spring 9 is fixed to the top of the guide sleeve accommodating cavity, the upper part of the sleeve is set as a truncated cone structure, the lower part of the guide sleeve is set as a cylindrical structure, the cavity wall of the guide sleeve accommodating cavity is provided with separating opening grooves 7 at intervals along the circumferential direction, the separating opening grooves separate the cavity wall of the guide sleeve accommodating cavity into a plurality of expansion sheets 8, the groove bottom of the separating opening grooves is set as a circle, when the press-in sleeve is sleeved on the guide sleeve, the inner wall surface of the expansion sheet is in contact with the lower outer wall surface of the guide sleeve, the spring is located in the spring cavity and the lower end of the spring is against the guide sleeve.

[0018] The method of using the utility model is as follows: the lower part of the piston 12 is placed in the lower positioning groove on the piston positioning seat to fix it, the guide sleeve is placed on the piston so that the upper part of the piston is located in the upper positioning groove on the guide sleeve, the sealing ring 12 is sleeved on the guide sleeve, the press-in sleeve is sleeved on the guide sleeve, the press-in sleeve is pressed down, the open end surface of the guide sleeve accommodating cavity contacts the sealing ring and pushes the sealing ring downward into the annular groove of the piston, the press-in sleeve is released, the spring pushes up the press-in sleeve, the press-in sleeve is separated from the guide sleeve, the guide sleeve is removed and the piston is taken out, and the installation of the sealing ring is completed.

[0019] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A piston seal ring introduction device, characterized in that: The invention comprises a piston positioning seat (1), a guide sleeve (2) and a press-in sleeve (3); the piston positioning seat is provided with a lower positioning groove (4) for accommodating the lower part of the piston; the guide sleeve is provided with an upper positioning groove (5) for accommodating the upper part of the piston; the press-in sleeve is provided with a guide sleeve accommodating cavity (6) adapted to the guide sleeve; when the press-in sleeve is covered on the guide sleeve, the inner wall surface of the guide sleeve accommodating cavity is in contact with the outer wall surface of the guide sleeve.

2. A piston seal ring introduction device according to claim 1, characterized in that: The upper part of the guide sleeve is set as a truncated cone structure, the lower part of the guide sleeve is set as a cylindrical structure, and the inner wall surface of the guide sleeve accommodating cavity is in contact with the outer wall surface of the lower part of the guide sleeve.

3. A piston seal ring introduction device according to claim 2, characterized in that: Separation opening grooves (7) are provided at intervals along the circumferential direction on the cavity wall of the guide sleeve accommodating cavity, and the separation opening grooves separate the cavity wall of the guide sleeve accommodating cavity into a plurality of expansion pieces (8), and the inner wall surface of the expansion piece is in contact with the lower outer wall surface of the guide sleeve.

4. A piston seal ring introduction device according to claim 3, characterized in that: The groove bottom of the separating opening groove is set to be arc-shaped or circular.

5. A piston seal ring introduction device according to any one of claims 1 to 4, characterized in that: A spring (9) is fixed to the top of the guide sleeve accommodating cavity, and a spring cavity (10) is provided on the guide sleeve. When the sleeve is pressed onto the guide sleeve, the spring is located in the spring cavity and the lower end of the spring abuts against the guide sleeve.

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