CN216951617U

CN216951617U - Double-sealing structure piston

Info

Publication number: CN216951617U
Application number: CN202123243855.1U
Authority: CN
Inventors: 王泊钧; 高拴路; 王斌
Original assignee: Shaanxi Fenghang Technology Co ltd
Current assignee: Shaanxi Fenghang Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-07-12
Anticipated expiration: 2031-12-22

Abstract

The utility model discloses a piston with a double-sealing structure, which comprises a piston and a shell, wherein the piston is arranged in the shell, piston sealing grooves are respectively processed on the inner walls of the left side and the right side of the outer wall of the piston, O-shaped sealing rings are respectively arranged in the piston sealing grooves, and the outer walls of the O-shaped sealing rings are tightly attached to the inner wall of the shell. This double containment structure piston, through the piston, O type sealing washer, the cooperation between casing and the piston seal groove, make the piston motion in-process, lubricating grease is in the centre of two O type sealing washers, can play the continuous lubrication action, effectively reduce the sealing washer wearing and tearing and cause the gas leakage phenomenon, play furthest lubrication action in mechanical motion, the unusual that very big protection sealing washer wearing and tearing and casing wearing and tearing brought, increase product life, it is serious to have avoided the lubricating grease loss to lead to the fact the unusual wearing and tearing of end sealing washer excessively, reduce product life, the maintenance frequency is frequent, cause the problem of very big waste for the society.

Description

Double-sealing structure piston

Technical Field

The utility model relates to the technical field of pistons, in particular to a piston with a double-sealing structure.

Background

Along with the high-speed development of social economy, engineering machinery plays an important role in urban construction, suburban highway, bridge, tunnel construction and the like, an original sealing structure of a truck gearbox auxiliary box piston adopts single sealing ring internal sealing, friction heating is generated in the process of reciprocating motion in working time due to high air pressure in the using process, the sealing ring is worn and failed, more than 80% of fault parts cause air leakage due to the fact that the sealing ring is worn and failed, a user responds that a vehicle resists air leakage and is not put into gear, and a servo valve is detected to be normal, the piston rubber ring of a high-low gear shifting cylinder is detected to be not tight in sealing, and therefore the low-gear air leakage vehicle cannot normally run.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a piston with a double-sealing structure, which aims to solve the problems that the bottom sealing ring is seriously abnormally abraded due to excessive lubricating grease loss, the service life of a product is shortened, the maintenance frequency is frequent, and great waste is caused to the society.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a double containment structure piston, includes piston and casing, the inside of casing is provided with the piston, the piston seal groove has all been processed to the outer wall left and right sides inner wall of piston, O type sealing washer is all installed to the inside of piston seal groove, the outer wall of O type sealing washer all closely laminates with the inner wall of casing.

Preferably, the inner centers of the pistons are all processed with through holes.

Preferably, the left side and the right side of the inner wall of the through hole are provided with inclined planes convenient for installation.

Compared with the prior art, the utility model has the beneficial effects that: this double-seal structure piston:

through the piston, the O type sealing washer, the cooperation between casing and the piston seal groove, make in the piston motion process, lubricating grease is in the centre of two O type sealing washers, can play the continuous lubrication action, effectively reduce the sealing washer wearing and tearing and cause the gas leakage phenomenon, this embodiment plays double-deck guard action through two sealing washers, can prevent the damage gas leakage phenomenon that appears in the mechanical limit action simultaneously, adopt the double containment, prevent the lubricating grease loss, play furthest lubrication action in mechanical motion, greatly protect the anomaly that sealing washer wearing and tearing and casing wearing and tearing brought, increase product life, it is serious to have avoided the lubricating grease loss too big bottom seal circle abnormal wear that causes, reduce product life, the maintenance number of times is frequent, cause the problem of very big waste for the society.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic structural view of the piston, the O-ring and the through hole in fig. 1.

In the figure: 1. piston, 2, O type sealing washer, 3, piston seal groove, 4, casing, 5, through-hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a double containment structure piston, including piston 1 and casing 4, casing 4's inside is provided with piston 1, piston 1's outer wall left and right sides inner wall all processes has piston seal groove 3, O type sealing washer 2 is all installed to piston seal groove 3's inside, O type sealing washer 2 can realize the position of restriction lubricating grease, O type sealing washer 2's outer wall all closely laminates with casing 4's inner wall, O type sealing washer 2 can remove and guarantee the relative seal of removal in-process at casing 4's inner wall, piston 1's inside center all processes has through-hole 5, the processing of the inner wall left and right sides of through-hole 5 has the inclined plane of the installation of being convenient for.

When the piston with the double-sealing structure is needed to be used, firstly, an O-shaped sealing ring 2 can be installed in a piston sealing groove 3 in the outer wall of a piston 1 by a user, the piston 1 with the O-shaped sealing ring 2 installed is installed in a shell 4, meanwhile, the piston 1 is connected with an external piston rod through a through hole 5, when the piston is used, the piston rod can drive the piston 1 to move on the inner wall of the shell 4, the piston 1 drives two O-shaped sealing rings 2 to reciprocate in the shell 4 to realize high and low gear shifting, the two O-shaped sealing rings 2 act with the piston 1 and lubricating grease stored in the middle when in motion, (the sealing rings are installed in a piston sealing groove 3 to be contacted with the shell 4 and the piston 1, have certain compression deformation and play a self-sealing effect on the supporting force generated by the sealing rings on the piston 1 and the shell 4 by means of self compression deformation), in the motion process of the piston 1, the lubricating grease is arranged between the two O-shaped sealing rings 2, so that the continuous lubricating effect can be achieved, the air leakage phenomenon caused by the abrasion of the sealing rings is effectively reduced, the double-seal structure is adopted to achieve the double-layer protection effect through the two sealing rings, the damage air leakage phenomenon occurring in mechanical limit action can be simultaneously prevented, the loss of the lubricating grease is prevented, the maximum lubricating effect is achieved in mechanical motion, the abnormity caused by the abrasion of the sealing rings and the abrasion of a shell is greatly protected, the service life of a product is prolonged, the problem that the bottom sealing rings are abnormally abraded seriously due to the excessive loss of the lubricating grease is avoided, the service life of the product is shortened, the maintenance frequency is frequent, and the problem of great waste is caused to the society.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a dual-seal structure piston, includes piston (1) and casing (4), the inside of casing (4) is provided with piston (1), its characterized in that: piston seal groove (3) have all been processed to the outer wall left and right sides inner wall of piston (1), O type sealing washer (2) are all installed to the inside of piston seal groove (3), the outer wall of O type sealing washer (2) all closely laminates with the inner wall of casing (4).

2. The dual seal structure piston as claimed in claim 1, wherein: through holes (5) are machined in the centers of the inner parts of the pistons (1).

3. The dual seal structure piston as claimed in claim 2, wherein: inclined planes convenient to mount are processed on the left side and the right side of the inner wall of the through hole (5).