CN217926556U

CN217926556U - Large-span floating spacer bush structure

Info

Publication number: CN217926556U
Application number: CN202222345273.2U
Authority: CN
Inventors: 王天宇; 杨泗华; 郑圆圆
Original assignee: Xuzhou XCMG Hydraulics Co Ltd
Current assignee: Xuzhou XCMG Hydraulics Co Ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2022-11-29
Anticipated expiration: 2032-09-05

Abstract

The utility model discloses a spacer structure that floats in big span, including annular spacer, the cover is equipped with the piston rod in the annular spacer hole, form even clearance delta D between annular spacer and the piston rod, 0.8mm is less than or equal to delta D and is less than or equal to 1.2mm, the embedded a plurality of supporting rings that are equipped with of annular spacer. Compared with the prior art, the utility model the advantage lie in: the risk of pulling the piston rod due to deformation of the spacer is reduced, the inner side of the spacer is additionally provided with the supporting ring, direct contact between the spacer and the piston rod is avoided, influence of the spacer on the piston rod is effectively reduced, and reliability of a product is improved.

Description

Large-span floating spacer bush structure

Technical Field

The utility model relates to a hydraulic cylinder technical field indicates a spacer structure floats in big span particularly.

Background

In the design of the hydraulic oil cylinder, the spacer bush is positioned between the guide bush and the piston, so that the stroke is limited, the mounting distance is adjusted, the service life of the hydraulic oil cylinder can be directly influenced by the performance of the spacer bush, wherein in the operation process of the hydraulic oil cylinder, two ends of the spacer bush are mutually extruded with the guide bush and the piston to bear strong vibration and impact load, the risk of bending deformation is generated, the piston rod is damaged by pulling due to the bending deformation of the spacer bush, and finally the hydraulic oil cylinder cannot work. Therefore, the reliability of the hydraulic oil cylinder is ensured, the risk of deformation of the spacer bush is avoided, the hydraulic oil cylinder is an important subject in the mechanical industry, and the hydraulic oil cylinder is an important aspect of effectively ensuring the product quality and improving the product reliability.

SUMMERY OF THE UTILITY MODEL

The utility model discloses what solve is the technical problem who mentions in the above background art, provides a simple structure, wide big span spacer structure that floats of application scope.

In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides a large-span floating spacer structure, includes annular spacer, the cover is equipped with the piston rod in the annular spacer hole, form even clearance delta D between annular spacer and the piston rod, delta D is more than or equal to 0.8mm and is less than or equal to 1.2mm, the embedded a plurality of support rings that are equipped with of annular spacer.

Furthermore, the supporting rings are sleeved on the piston rod along the axial direction of the piston rod and are in clearance fit with the piston rod, and the supporting rings are uniformly arranged in the axial direction of the piston rod at intervals.

Further, the uniform gap Δ D =1mm between the annular spacer and the piston rod.

Furthermore, a plurality of annular positioning grooves are formed in the annular spacer bush, the supporting ring is embedded in the annular positioning grooves, and the depth h of each annular positioning groove is not less than 4.6mm and not more than 4.8mm.

Furthermore, fillet treatment is carried out on the intersection line of the surface and the surface of the annular spacer bush.

Furthermore, fillet treatment is carried out between the inner ring surface and the side edge of the supporting ring.

Compared with the prior art, the utility model the advantage lie in: the risk of pulling damage of the piston rod due to deformation of the spacer sleeve is reduced, the support ring is additionally arranged on the inner side of the spacer sleeve, direct contact between the spacer sleeve and the piston rod is avoided, the influence of the spacer sleeve on the piston rod is effectively reduced, and the reliability of a product is improved;

the beneficial effects of the utility model still lie in: the spacer bush plays a certain protective role in the supporting ring, the spacer bush is extruded between the guide sleeve and the piston to allow small-range deformation, and the lateral load resistance of the spacer bush is enhanced.

Drawings

Fig. 1 is a schematic view of a large-span floating spacer structure according to an embodiment of the present invention.

In the drawings:

1. an annular spacer bush; 2. a support ring; 3. a piston rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the large-span floating spacer structure comprises an annular spacer 1, a piston rod 3 is sleeved in an inner hole of the annular spacer 1, the diameter of the piston rod 3 is D, an even gap delta D is formed between the annular spacer 1 and the piston rod 3, the delta D is not less than 0.8mm and not more than 1.2mm, and is more preferable, and the delta D =1mm.

Two annular positioning grooves are formed in the annular spacer sleeve 1, supporting rings 2 are embedded in the annular positioning grooves, the depth h of each annular positioning groove is not less than 4.6mm and not more than 4.8mm, the supporting rings 2 are sleeved on the piston rod 3 along the axial direction of the piston rod 3 and are in clearance fit with the piston rod 3, and the two supporting rings 2 are arranged at intervals in the axial direction of the piston rod 3.

The intersection line of the surface and the surface of the annular spacer 1 is subjected to fillet treatment, and the fillet treatment is performed between the inner ring surface and the side edge of the supporting ring 2.

The utility model discloses when concrete implementation:

as shown in fig. 1, in the embodiment of the present invention, the gap Δ D =1mm between the annular spacer 1 and the piston rod 3, and the supporting ring 2 is in clearance fit with the piston rod 3, so that the spacer can slide on the piston rod 3.

When using, piston rod 3 is telescopic motion around under the pressure drive of hydraulic oil, 1 sliding connection of annular spacer sleeve is on piston rod 3, receive the extrusion between piston and the uide bushing, play spacing effect to the piston simultaneously, when receiving the extrusion of piston and uide bushing, can greatly reduced strain the risk of piston rod 3 because of the spacer sleeve deformation, including supporting ring 2 in the spacer sleeve inboard, because the existence of supporting ring 2 during its motion, make to have certain clearance between annular spacer sleeve 1 and the piston rod 3, and can play good supporting effect.

Meanwhile, the spacer bush plays a certain role in protecting the support ring 2, the spacer bush is extruded between the guide sleeve and the piston to allow small-range deformation, and the side load resistance of the spacer bush can be enhanced.

In the description of the present invention, it is to be understood that the term "plurality" means two or more unless specifically limited otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly and may, for example, be fixedly connected or detachably connected or integrated. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a spacer structure floats in big span, includes annular spacer (1), its characterized in that: the piston rod (3) is sleeved in the inner hole of the annular spacer bush (1), an even gap delta D is formed between the annular spacer bush (1) and the piston rod (3), the delta D is not less than 0.8mm and not more than 1.2mm, and a plurality of supporting rings (2) are embedded in the annular spacer bush (1).

2. The large-span floating spacer structure of claim 1 wherein: the supporting rings (2) are sleeved on the piston rod (3) along the axial direction of the piston rod (3) and are in clearance fit with the piston rod (3), and the supporting rings (2) are uniformly arranged in the axial direction of the piston rod (3) at intervals.

3. The large-span floating spacer structure of claim 1, wherein: the uniform gap delta D =1mm between the annular spacer bush (1) and the piston rod (3).

4. The large-span floating spacer structure of claim 1 wherein: a plurality of annular positioning grooves are formed in the annular spacer sleeve (1), the supporting ring (2) is embedded in the annular positioning grooves, and the depth h of each annular positioning groove is not less than 4.6mm and not more than 4.8mm.

5. The large-span floating spacer structure of claim 1, wherein: and the intersection line of the surface and the surface of the annular spacer bush (1) is subjected to fillet treatment.

6. The large-span floating spacer structure of claim 1, wherein: and the fillet treatment is carried out between the inner ring surface and the side edge of the supporting ring (2).