CN212838713U

CN212838713U - Piston of split type anti-loosening structure

Info

Publication number: CN212838713U
Application number: CN202021778386.6U
Authority: CN
Inventors: 褚金虎; 张强; 李鹏博; 杨旭伟; 赵龙
Original assignee: Xuzhou XCMG Hydraulics Co Ltd
Current assignee: Xuzhou XCMG Hydraulics Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-03-30
Anticipated expiration: 2030-08-24

Abstract

The utility model discloses a split type anti loosening structure's piston belongs to pneumatic cylinder technical field. The piston comprises a piston body I and a piston body II; the piston body I and the piston body II are connected and installed at the end part of the piston rod through threads; the adjacent surfaces of the piston body I and the piston body II are tightly attached, and the outer circumferential surfaces of the piston body I and the piston body II are matched with the inner wall of the cylinder barrel. The utility model discloses use under two split type piston bodies are connected with the piston rod, effectively solved the locking problem of piston to and the movable seal installation, the sealed problem of vulnerable damage, stable in structure is reliable, the commonality is strong, needs installation space less, split type piston body structure, processing is simple.

Description

Piston of split type anti-loosening structure

Technical Field

The utility model relates to a pneumatic cylinder technical field specifically is a split type anti loosening structure's piston.

Background

The Chinese patent discloses an engineering oil cylinder piston anti-loosening mechanism (CN 202718964U), wherein a screw annular groove is arranged at the thread part of the front end part of a piston rod, which is connected with a locking nut, and the screw annular groove is V-shaped and matched with the conical end surface of a locking screw. An elastic retainer ring groove is arranged at the inlet of the locking screw hole, and the outer end face of the locking screw and an elastic retainer ring in the elastic retainer ring groove form locking fit. Swirl grooves with opposite swirl directions are arranged on the front end surfaces of the locking nut and the piston. According to the technical scheme, a double locking mode is adopted around the locking nut, and the screwed piston and the locking nut are reliably fixed on the piston rod.

The existing piston anti-loosening mechanism has the following problems:

(1) the locking screw and the screw annular groove are adopted, and the processing is complex; after the piston and the piston rod are screwed, the matched drilling of a set screw is required, scrap iron generated by the matched drilling is not easy to clean, the hydraulic cylinder is polluted, and the strain sealing is ineffective;

(2) and the locking nut and the piston are adopted, so that the required space is large, the oil cylinder with a compact structure is not suitable, and the application range is limited.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a split type anti loosening structure's piston.

The utility model discloses a following technical scheme realizes: a piston with a split type anti-loose structure comprises a piston body I and a piston body II; the piston body I and the piston body II are connected and installed at the end part of the piston rod through threads; the adjacent surfaces of the piston body I and the piston body II are tightly attached, and the outer circumferential surfaces of the piston body I and the piston body II are matched with the inner wall of the cylinder barrel.

It further comprises the following steps: a supporting ring groove is formed in the outer circle of the piston body I, an inner hole thread connected with the end part of the piston rod in a matched mode is formed in the center hole of the piston body I, and a screwing process hole is formed in the end face, far away from the piston body II, of the piston body I.

A supporting ring groove and a dynamic sealing groove are formed in the outer circle of the piston body II, an inner hole thread which is connected with the end part of the piston rod in a matched mode is formed in the center hole of the piston body II, a screwing process hole is formed in one end face, close to the piston body I, of the piston body II, and a static sealing groove is formed in one end face, far away from the piston body I, of the piston body II; and the static sealing groove of the piston body II is matched with the stepped end face of the piston rod.

And the outer circle dynamic sealing groove of the piston body II is communicated to the end face of the piston body II, which is tightly attached to the piston body I.

Compared with the prior art, the beneficial effects of the utility model are that: the piston is used under the condition that the two split piston bodies are connected with the piston rod, the anti-loosening problem of the piston is effectively solved, and the sealing structure is not easy to damage, stable and reliable and has strong universality; the split piston body structure is simple to process and convenient to install and maintain in dynamic sealing.

Drawings

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

in the figure: 1. a cylinder barrel; 2. a piston body I; 3. a piston body II; 4. a piston rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figure 1, a piston of a split type anti-loose structure is characterized in that a plug body I2 and a piston body II 3 are both installed at the end part of a piston rod 4 through threaded connection; the adjacent surfaces of the piston body I2 and the piston body II 3 are tightly attached, and the outer circumferential surfaces of the piston body I2 and the piston body II 3 are matched with the inner wall of the cylinder barrel 1.

A supporting ring groove is formed in the outer circle of the piston body I2 and used for installing a supporting ring. The hole screw thread that is connected with 4 tip cooperations of piston rod is seted up in piston body I2 centre bore, fastens at 4 tip of piston rod through threaded connection. And a screwing process hole is formed in the end face, far away from the piston body II 3, of the piston body I2, so that the piston body I2 can be conveniently mounted and dismounted.

And a supporting ring groove and a dynamic seal groove are formed in the excircle of the piston body II 3 and are used for installing a supporting ring and a main seal. And the dynamic sealing groove is communicated to the left end face of the piston body II 3, so that the installation and maintenance are convenient. And an inner hole thread which is matched and connected with the end part of the piston rod 4 is formed in the center hole of the piston body II 3, and the piston body II is fastened at the end part of the piston rod 4 through threaded connection. And a screwing process hole is formed in the end face, close to the piston body I2, of the piston body II 3, so that the piston body II 3 can be conveniently mounted and dismounted. A static seal groove is formed in the end face, away from the piston body I2, of the piston body II 3 and used for installing static seals, and the static seals are matched with the stepped end faces of the piston rod 4 to be tightly propped.

In the embodiment, after the piston body II 3 is connected with the piston rod 4, the piston body I2 is tightly attached to the piston body II 3, the double-nut anti-loose structure is applied to the piston, the anti-loose problem of the piston is effectively solved, and the double-nut anti-loose structure is stable and reliable in structure and high in universality. Compared with the prior art, the oil cylinder does not need a set screw to match with a drill, does not generate scrap iron, ensures the cleanliness of the oil cylinder, and is favorable for improving the reliability of products.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a split type anti loosening structure's piston which characterized in that: the piston comprises a piston body I (2) and a piston body II (3); the piston body I (2) and the piston body II (3) are installed at the end part of the piston rod (4) through threaded connection; the adjacent surfaces of the piston body I (2) and the piston body II (3) are tightly attached, and the outer circumferential surfaces of the piston body I (2) and the piston body II (3) are matched with the inner wall of the cylinder barrel (1).

2. The piston of the split type looseness-prevention structure according to claim 1, wherein: a supporting ring groove is formed in the outer circle of the piston body I (2), an inner hole thread connected with the end portion of the piston rod (4) in a matched mode is formed in the center hole of the piston body I (2), and a screwing process hole is formed in one end face, far away from the piston body II (3), of the piston body I (2).

3. The piston of the split type looseness-prevention structure according to claim 1, wherein: a supporting ring groove and a dynamic sealing groove are formed in the excircle of the piston body II (3), an inner hole thread which is connected with the end part of the piston rod (4) in a matched mode is formed in the center hole of the piston body II (3), a screwing process hole is formed in one end face, close to the piston body I (2), of the piston body II (3), and a static sealing groove is formed in one end face, far away from the piston body I (2), of the piston body II (3); and the static sealing groove of the piston body II (3) is matched with the stepped end face of the piston rod (4).

4. The piston of a split type looseness-prevention structure according to claim 3, wherein: and the excircle dynamic sealing groove of the piston body II (3) is communicated to the end face of the piston body II (3) tightly attached to the piston body I (2).