CN212337783U

CN212337783U - Piston stroke stop gear

Info

Publication number: CN212337783U
Application number: CN202021001896.2U
Authority: CN
Inventors: 于忠海; 施晓鹏; 隋国鑫
Original assignee: Dalian Techtension Industrial Co ltd
Current assignee: Dalian Techtension Industrial Co ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-01-12
Anticipated expiration: 2030-06-04

Abstract

A piston stroke limiting mechanism belongs to the technical field of stroke limiting of hydraulic fastening tool piston overtravel. The scheme is as follows: the method comprises the following steps: the cylinder body comprises a plug A, a spring, a steel ball, a limiting pin and a limiting module, wherein the plug A is arranged in the limiting module, one end of the spring is connected with the plug A, the other end of the spring is connected with the steel ball, one end of the limiting pin is connected with the steel ball, and the other end of the limiting pin is connected with the cylinder body. The utility model has the advantages that because the piston stroke limiting mechanism is arranged externally, if the mechanism is damaged, the mechanism only needs to be disassembled and replaced by a new stroke limiting mechanism, thereby avoiding disassembling the cylinder. The working time is saved; because the utility model discloses external with piston stroke stop gear, can not produce any influence to sealed, guaranteed sealed life-span.

Description

Piston stroke stop gear

Technical Field

The utility model belongs to the technical field of the stroke of hydraulic pressure fastening tool piston overtravel is spacing, especially, relate to a piston stroke stop gear.

Background

At present, the bolt tensioner used in the hydraulic bolt fastening tool generally adopts several built-in solutions for the travel limit, and the travel limit has the following problems:

the built-in piston stroke limit is generally formed by adding a stroke limit mechanism in a cylinder body or slotting a cylinder wall, and the selection of adding the stroke limit in the cylinder body can cause the problems that the cylinder needs to be repeatedly disassembled in the debugging process, is complex and possibly causes some unnecessary problems; if the groove is formed in the cylinder body, the damage to sealing is large after long-time use, and the sealing service life is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem existing in the prior art, the utility model provides a piston stroke stop gear, this mechanism carry on stroke stop gear external, and the jar is avoided tearing open in convenient replacement, has saved operating time, has guaranteed sealed life-span.

The technical scheme is as follows:

a piston travel limit mechanism, comprising: the cylinder body comprises a plug A, a spring, a steel ball, a limiting pin and a limiting module, wherein the plug A is arranged in the limiting module, one end of the spring is connected with the plug A, the other end of the spring is connected with the steel ball, one end of the limiting pin is connected with the steel ball, and the other end of the limiting pin is connected with the cylinder body.

Further, the oil duct sealing device further comprises a plug B used for sealing the oil duct, and the plug B is arranged below the limiting module.

Further, still including being used for sealed spacing module and cylinder body junction's combination packing ring, the combination packing ring is placed in spacing module's seal groove.

Furthermore, the piston stroke limiting mechanism further comprises an inner hexagon bolt, and the inner hexagon bolt penetrates through the piston stroke limiting mechanism and is fixed on the cylinder body.

Piston stroke stop gear compare with current piston stroke is spacing, following beneficial effect has:

1. because the utility model discloses it is external with piston stroke stop gear, if the mechanism damages, only need pull down this mechanism, the stroke stop gear that replaces new can, avoid tearing open the jar. The working time is saved.

2. Because the utility model discloses external with piston stroke stop gear, can not produce any influence to sealed, guaranteed sealed life-span.

Drawings

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

fig. 2 is an isometric view of the present invention;

the reference numbers in the figures are as follows: the piston comprises a 1-plug, a 2-spring, a 3-steel ball, a 4-limit pin, a 5-limit module, a 6-plug, a 7-combined washer, an 8-inner hexagon bolt, a 9-piston and a 10-cylinder body.

Detailed Description

The piston stroke limiting mechanism is further described below with reference to fig. 1-2.

A piston travel limit mechanism, comprising: the plug A1, the spring 2, the steel ball 3, the limit pin 4 and the limit module 5, wherein the plug A1 is arranged in the limit module 5, one end of the spring 2 is connected with the plug A1, the other end of the spring is connected with the steel ball 3, one end of the limit pin 4 is connected with the steel ball 3, and the other end of the limit pin is connected with the piston 9.

Further, the oil-way sealing device further comprises a plug B6 for sealing an oil way, and the plug B6 is arranged below the limiting module 5.

Further, the combined type oil cylinder further comprises a combined gasket 7 used for sealing the connection part of the limiting module and the cylinder body, and the combined gasket 7 is placed in the sealing groove of the limiting module 5.

Further, the piston device further comprises an inner hexagon bolt 8, and the inner hexagon bolt 8 penetrates through the piston stroke limiting mechanism and is fixed on the cylinder body 10.

The steel ball 3 is attached to the conical surface through the spring 2 in the limiting module 5, the conical surface refers to the surface, close to one side of the cylinder body 10, in a hole where the spring 2 of the limiting module 5 is located, hydraulic oil in an oil cavity of the oil cylinder enters the limiting module 5 through an oil duct, the steel ball 3 and the conical surface form sealing under the condition of pressure, two ends of the oil duct are sealed through plugs, the limiting module 5 and the cylinder body 10 are sealed through a combined gasket 7, and therefore the piston stroke limiting mechanism is integrally formed in a sealing state, and the normal motion state of a piston is not affected.

When the piston moves beyond a preset stroke, the inclined surface on the surface of the piston 9 is in contact with the limiting pin 4 in the piston stroke limiting mechanism, the limiting pin 4 is enabled to continuously move towards the left side, when the limiting pin 4 is in contact with the steel ball 3, the sealing state formed by the steel ball 3 and the conical surface is broken, hydraulic oil leaks from the position, the oil pressure in the oil cavity is instantly reduced, the piston 9 is warned to reach the maximum stroke, and the phenomenon that the piston is exploded to damage sealing due to the fact that the pressure exceeds the stroke due to overhigh pressure is avoided.

The utility model discloses an assembly method as follows:

A. placing the steel ball 3 and the spring 2 in the hole of the limiting module 5 in sequence, compressing the spring 2 by using a plug A1 to enable the steel ball 3 to be attached to the conical surface, and simultaneously sealing the oil channel by using a plug A1;

B. the oil passage is sealed by a plug B6;

C. placing the combined gasket 7 in a sealing groove of the limiting module 5;

D. placing the limit pin 4 at the opening of the cylinder body;

E. the piston stroke limiting mechanism is fixed on the cylinder body 10 by two hexagon socket head cap bolts 8 (note that the limiting pin 4 should be in the openings of the limiting module 5 and the cylinder body 10 at the same time).

The above description is only the specific implementation manner of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the design of the present invention within the technical scope of the present invention.

Claims

1. A piston stroke stop gear, its characterized in that includes: the cylinder body is characterized by comprising a plug A (1), a spring (2), a steel ball (3), a limiting pin (4) and a limiting module (5), wherein the plug A (1) is arranged in the limiting module (5), one end of the spring (2) is connected with the plug A (1), the other end of the spring is connected with the steel ball (3), one end of the limiting pin (4) is connected with the steel ball (3), and the other end of the limiting pin is connected with the cylinder body (10).

2. The piston stroke limiting mechanism according to claim 1, further comprising a plug B (6) for sealing an oil passage, wherein the plug B (6) is arranged below the limiting module (5).

3. The piston stroke limiting mechanism according to claim 1, further comprising a combined gasket (7) for sealing the connection between the limiting module and the cylinder, wherein the combined gasket (7) is placed in the sealing groove of the limiting module (5).

4. The piston stroke limiting mechanism according to claim 1, further comprising an inner hexagonal bolt (8), wherein the inner hexagonal bolt (8) passes through the piston stroke limiting mechanism and is fixed on the cylinder (10).