CN219035201U

CN219035201U - Jackscrew and retainer ring combined anti-loosening structure for piston

Info

Publication number: CN219035201U
Application number: CN202222966400.0U
Authority: CN
Inventors: 孙朗朗; 张强; 郭彦斌; 陈希; 马军杰; 朱安强
Original assignee: Xuzhou XCMG Hydraulics Co Ltd
Current assignee: Xuzhou XCMG Hydraulics Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-05-16
Anticipated expiration: 2032-11-08

Abstract

The utility model belongs to the technical field of hydraulic cylinders, and relates to a hydraulic cylinder piston, in particular to a jackscrew and retainer ring combined anti-loosening structure for a piston. According to the utility model, the locking jackscrew is limited by arranging the shaft retainer ring, so that the problem of piston looseness caused by jackscrew withdrawal caused by oil cylinder vibration is effectively avoided, the minimum improvement is adopted, and the anti-loosening effect of the piston is improved.

Description

Jackscrew and retainer ring combined anti-loosening structure for piston

Technical Field

The utility model belongs to the technical field of hydraulic cylinders, relates to a hydraulic cylinder piston, and particularly relates to a jackscrew and retainer ring combined anti-loosening structure for a piston.

Background

The hydraulic cylinder in the engineering machinery has wide application range and high frequency, and the reliability of the hydraulic cylinder is particularly outstanding. Piston looseness is one of the hydraulic cylinder failure modes and sometimes occurs. The piston is usually fixed with the jackscrew in a loose manner, and the structure is easy to withdraw the jackscrew when the oil cylinder is subjected to a long-term vibration working condition, so that the piston is loosened, and the use of the hydraulic cylinder is influenced.

Disclosure of Invention

In order to solve the problems, the utility model provides a combined anti-loosening structure of a jackscrew and a retainer ring for a piston, wherein the jackscrew is pressed by the retainer ring for a shaft in the circumferential direction of the jackscrew of the piston, and the combined anti-loosening structure greatly improves the anti-loosening effect and the range of the applicable working conditions of an oil cylinder.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a jackscrew adds retaining ring combination locking structure for piston, includes piston and piston rod through threaded connection the piston end is radial to be connected fixedly through tight jackscrew and piston rod the ring channel is seted up to the tight jackscrew circumference position of piston, block the retaining ring for the solid axle in ring channel.

Further, a tight jackscrew hole of the piston is formed in the annular groove.

Further, the upper end of the installed tight jackscrew is not higher than the annular groove surface.

Further, the depth of the annular groove is not smaller than the annular width of the shaft retainer ring, and the annular groove width is equal to the thickness of the shaft retainer ring.

Further, the shaft retainer ring is a notch type circular ring with elasticity.

According to the utility model, the locking jackscrew is limited by arranging the shaft retainer ring, so that the problem of piston looseness caused by jackscrew withdrawal caused by oil cylinder vibration is effectively avoided, the minimum improvement is adopted, and the anti-loosening effect of the piston is improved.

Drawings

Fig. 1: the anti-loosening structure is schematically shown in the utility model;

fig. 2: the utility model is an enlarged view of part a in fig. 1;

fig. 3: the utility model discloses a schematic diagram of a check ring for a shaft.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, a hydraulic cylinder piston 1 is fixed at the hydraulic end of a piston rod 2, and the piston 1 is connected with the piston rod 2 through threads. In order to prevent the piston 1 from loosening, a tightening jackscrew 3 is radially increased at the tail end of the piston 1 to prevent loosening, the lower end part of the tightening jackscrew 3 is sunken to a certain radial depth of the piston rod 2, and the piston 1 and the piston rod 2 are fixed in a machine-proof manner.

As shown in fig. 2, an annular groove 5 is formed in the piston 1 at a position in the circumferential direction of the tight thread 3 for placing the shaft retainer 4. The shaft retainer ring 4 is clamped and fixed in the annular groove 5 to tightly press the fixed jackscrew 3, so that the fixed jackscrew 3 is prevented from withdrawing due to vibration, and the piston 1 is effectively prevented from loosening. The tight thread hole of the piston 1 is arranged in the annular groove 5. After the fixing jackscrew 3 is installed, the upper end part of the fixing jackscrew is not higher than the annular groove surface, so that the shaft retainer ring 4 is prevented from being blocked and fixed in the annular groove 5 completely. If the retainer ring 4 for the shaft is not firmly clamped, under the vibration working condition of the oil cylinder, the retainer ring 4 for the shaft has a falling risk, and then the tight jackscrew 3 is pressed and withdrawn, and finally the piston 1 is loosened. In order to stably clamp the shaft retainer 4 to the piston 1 and prevent the shaft retainer 4 from falling off, the shaft retainer 4 should be completely fixed in the annular groove 5, and for this purpose, the depth of the annular groove 5 is preferably not smaller than the annular width of the shaft retainer 4, and the annular groove 5 is preferably equal to the thickness of the shaft retainer 4.

As shown in fig. 3, the shaft retainer ring 4 is a notch-type ring having a certain elasticity. The retainer ring 4 for the shaft deforms under the action of external force, the inner diameter of the retainer ring 4 for the shaft and the caliber of the notch are increased, and the retainer ring 4 for the shaft is conveniently placed in the annular groove 5; after external force is removed, the shaft retainer ring 4 is self-elastically restored, contracted and clamped in the annular groove 5, and the fixed jackscrew 3 is limited.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein 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 jackscrew adds retaining ring combination locking structure for piston, includes piston (1) and piston rod (2) through threaded connection piston (1) terminal radial through tight jackscrew (3) be connected fixedly with piston rod (2), its characterized in that: an annular groove (5) is formed in the circumferential position of the tight jackscrew (3) of the piston (1), and a retainer ring (4) for a shaft is clamped on the annular groove (5).

2. The combined locking structure of jackscrew and retainer ring for piston according to claim 1, wherein: the tightly fixed jackscrew hole of the piston (1) is arranged in the annular groove (5).

3. The combined locking structure of jackscrew and retainer ring for piston according to claim 1, wherein: the upper end part of the tight jackscrew (3) is not higher than the annular groove surface.

4. The combined locking structure of jackscrew and retainer ring for piston according to claim 1, wherein: the depth of the annular groove (5) is not smaller than the annular width of the shaft retainer ring (4), and the width of the annular groove (5) is equal to the thickness of the shaft retainer ring (4).

5. The combined locking structure of jackscrew and retainer ring for piston according to claim 1, wherein: the shaft retainer ring (4) is a notch type circular ring with elasticity.