CN210859413U

CN210859413U - Sealing structure of crusher oil cylinder

Info

Publication number: CN210859413U
Application number: CN201921729553.5U
Authority: CN
Inventors: 邱永宁; 吕龙; 尤庆成; 徐剑; 叶菁
Original assignee: Jiangsu Hengli Hydraulic Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Co Ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-06-26
Anticipated expiration: 2029-10-16

Abstract

The utility model discloses a seal structure of breaker hydro-cylinder, include the cylinder body and install piston rod and the piston in the cylinder body, be equipped with the uide bushing between piston rod and the cylinder body, the preceding terminal surface of uide bushing is the inclined end face, the inboard of uide bushing still is equipped with first sealing washer, circle a plurality of breachs in the first sealing washer, first sealing washer and piston rod cooperation, piston rod remove and make debris release the hydro-cylinder along the breach. In this way, the utility model discloses the seal structure of breaker hydro-cylinder can avoid the sealed inefficacy of hydro-cylinder and lead to the problem of leakage, can also avoid debris to get into inside the hydro-cylinder.

Description

Sealing structure of crusher oil cylinder

Technical Field

The utility model relates to a hydro-cylinder field especially relates to a seal structure of breaker hydro-cylinder.

Background

The crusher oil cylinder in the shield machine is mainly used for driving the clamping jaws to clamp crushed stones, and is characterized in that the oil cylinder is soaked in muddy water for a long time, crushed stone and silt are arranged around the oil cylinder, pressure exists, maintenance personnel need to enter a warehouse under pressure, maintenance cost is high, and the maintenance personnel also have risks, so that the requirement on the sealing stability of the oil cylinder is high.

The existing sealing structure in the market at present generally adopts the sealing structure shown in fig. 4 and 5. The existing sealing structure is as follows: when the piston rod of the oil cylinder retracts, surrounding gravels can be clamped in a gap between the end face of the guide sleeve and the end face of the piston rod, and the piston rod cannot retract. If the crushed stone is crushed again, the flying-out direction is not controllable, and the risk of damaging the piston rod may exist. Because the oil cylinder is soaked in muddy water, the inevitable dirt enters the seal and cannot be discharged after entering. The head of the guide sleeve is exposed outside, so that the risk of being damaged or abraded by gravels exists, and the screw is inconvenient to disassemble and assemble during maintenance.

Disclosure of Invention

The utility model discloses the main technical problem who solves provides a seal structure of breaker hydro-cylinder, can avoid the sealed inefficacy of hydro-cylinder and lead to the problem of leakage, can also avoid debris to get into inside the hydro-cylinder.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a seal structure of breaker hydro-cylinder, includes the cylinder body and installs piston rod and piston in the cylinder body, be equipped with the uide bushing between piston rod and the cylinder body, the preceding terminal surface of uide bushing is the inclined end face, the inboard of uide bushing still is equipped with first sealing washer, circle and seted up a plurality of breachs in the first sealing washer, first sealing washer and piston rod cooperation, piston rod remove and make debris release the hydro-cylinder along the breach.

In a preferred embodiment of the present invention, the inclined end surface is at an angle of 5 ° to 30 ° to the vertical direction.

In a preferred embodiment of the present invention, the gaps are evenly distributed along a circle where the center of the first sealing ring is located.

In a preferred embodiment of the present invention, the lip of the first sealing ring is disposed toward the inclined end surface.

In a preferred embodiment of the present invention, the notch is opened in a direction opposite to the lip.

In a preferred embodiment of the present invention, the left and right sides of the first sealing ring are further provided with a dust ring and a second sealing ring.

In a preferred embodiment of the present invention, the external thread of the outer periphery of the guide sleeve is engaged with the internal thread of the cylinder body.

The utility model has the advantages that: the utility model discloses the seal structure of breaker hydro-cylinder can avoid the sealed inefficacy of hydro-cylinder and lead to the problem of leaking, can also avoid debris to get into inside the hydro-cylinder.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic structural view of a preferred embodiment of a sealing structure of a crusher cylinder according to the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

FIG. 4 is a prior art sealing structure for a crusher cylinder;

FIG. 5 is a prior art sealing structure for a crusher cylinder;

the parts in the drawings are numbered as follows: 1. the device comprises a cylinder body, 2, a piston rod, 3, a piston, 4, a guide sleeve, 5, an inclined end face, 6, a first sealing ring, 7, a notch, 8, a dustproof ring, 9, a second sealing ring, 10 and a lip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 3, a sealing structure of a crusher oil cylinder includes a cylinder body 1, and a piston rod 2 and a piston 3 installed in the cylinder body 1, wherein a guide sleeve 4 is disposed between the piston rod 2 and the cylinder body 1, a front end surface of the guide sleeve 4 is an inclined end surface 5, a first sealing ring 6 is further disposed on an inner side of the guide sleeve 4, a plurality of notches 7 are disposed on an inner ring of the first sealing ring 6, the first sealing ring 6 is matched with the piston rod 2, and the piston rod 2 moves to enable sundries to be pushed out of the oil cylinder along the notches 7.

In addition, the included angle between the inclined end face 5 and the vertical direction is 5-30 degrees. When the piston rod 2 retracts, because the end face of the guide sleeve 4 is a flat inclined plane, the gravel and gravel can be discharged out of the oil cylinder along the inclined end face of the guide sleeve 4 during retraction.

In addition, the notches 7 are evenly distributed along the circle where the center of the first sealing ring 6 is located. When the impurities inevitably enter the sealing system, the impurities can be pushed out of the oil cylinder along the notch 7 of the first sealing ring 6, and the cleanliness of the sealing system of the piston rod 2 is effectively ensured. The lip 10 of the first sealing ring 6 is arranged towards the inclined end surface 5. The notch 7 opens in the opposite direction to the lip 10.

In addition, the left and right sides of the first sealing ring 6 are also provided with a dustproof ring 8 and a second sealing ring 9. The dustproof ring 8 is made of high-hardness polyester materials, replaces two original dustproof rings, has the same function and saves cost.

As shown in fig. 2, the external thread of the outer periphery of the guide sleeve 4 is engaged with the internal thread of the cylinder. The threaded connection structure is arranged in the oil cylinder, and the risk of being bruised or abraded by broken stones is avoided.

Be different from prior art, the utility model discloses the seal structure of breaker hydro-cylinder can avoid the sealed inefficacy of hydro-cylinder and lead to the problem of leakage, can also avoid debris to get into inside the hydro-cylinder.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

Claims

1. The utility model provides a seal structure of breaker hydro-cylinder, includes the cylinder body and installs piston rod and piston in the cylinder body, be equipped with the uide bushing between piston rod and the cylinder body, its characterized in that, the preceding terminal surface of uide bushing is the inclined end face, the inboard of uide bushing still is equipped with first sealing washer, circle in the first sealing washer and seted up a plurality of breachs, first sealing washer and piston rod cooperation, piston rod remove and make debris release the hydro-cylinder along the breach.

2. A sealing arrangement for a crusher cylinder as claimed in claim 1, characterized in that the angle of the inclined end surface to the vertical is 5 ° to 30 °.

3. A seal arrangement for a crusher cylinder as claimed in claim 1, wherein the gaps are evenly spaced along the circle in which the centre of the first seal is located.

4. A sealing structure of a crusher cylinder according to claim 3, characterized in that the lip of the first seal ring is disposed toward the inclined end surface.

5. A sealing arrangement for a crusher cylinder as claimed in claim 4, characterized in that the gap opens in the opposite direction to the lip.

6. A sealing structure of a crusher cylinder as claimed in any one of claims 1 to 5, characterized in that the left and right sides of the first seal ring are further provided with a dust ring and a second seal ring.

7. A sealing arrangement for a crusher cylinder as claimed in claim 6, characterised in that the external thread on the outer periphery of the guide bush is adapted to engage with an internal thread on the interior of the cylinder block.