CN-224200894-U - Novel multistage hydro-cylinder internal support limit structure

CN224200894UCN 224200894 UCN224200894 UCN 224200894UCN-224200894-U

Abstract

The utility model discloses a novel multi-stage cylinder internal supporting and limiting structure in the field of cylinders, which comprises a plurality of coaxially arranged cylinder bodies, wherein an inner Zhou Gang cylinder body is correspondingly arranged with an adjacent outer Zhou Gangtong body, at least one group of supporting and limiting components are arranged between the inner cylinder body and the outer cylinder body, each supporting and limiting component comprises an annular sliding block and a limiting ring, the sliding blocks and the limiting rings are sleeved on the corresponding cylinder bodies, the lower ends of the sliding blocks are wedge-shaped, the upper ends of the limiting rings are wedge-shaped, the corresponding sliding blocks are arranged at the upper ends of the sliding blocks, the lower ends of the sliding blocks are attached to the upper ends of the limiting rings, the sliding blocks press the lower limiting rings, the outer diameter of the sliding blocks is larger than that of the limiting rings, the sliding blocks are contacted with the inner walls of the peripheral cylinder bodies, and the spacing is reserved between the limiting rings and the peripheral cylinder bodies. The utility model avoids the limit ring from damaging the inner wall of the cylinder barrel caused by deflection of the cylinder barrel body.

Inventors

LI HONGDAN
SONG ZHIXIN
SU SHIHUAN
ZHAO YUHANG
Cai lianying
DING LONGLONG

Assignees

海沃机械（中国）有限公司

Dates

Publication Date: 20260505
Application Date: 20250513

Claims (6)

1. The utility model provides a novel inside supporting limit structure of multistage hydro-cylinder, includes the cylinder body that a plurality of coaxial settings, and interior Zhou Gang barrel corresponds the setting with adjacent outer Zhou Gangtong body, all is equipped with at least a set of spacing subassembly of support between two interior and exterior adjacent cylinder body, a serial communication port, the spacing subassembly of support includes annular slider and spacing ring, slider and spacing ring all overlap and establish on corresponding cylinder body, and the lower extreme of slider is the wedge, and the upper end of spacing ring corresponds the slider setting to the wedge, and the lower extreme of slider and the upper end of spacing ring laminate mutually and set up, and the slider presses the spacing ring of below, and the external diameter of slider is greater than the external diameter of spacing ring, and the slider contacts with the cylinder body inner wall of periphery, and spacing is left with the cylinder body of periphery.
2. The novel multistage oil cylinder internal supporting and limiting structure according to claim 1, wherein the inner periphery of the sliding block is provided with a first mounting part embedded into an inner periphery cylinder body, and an embedded mounting groove is formed in the cylinder body in a surrounding mode corresponding to the first mounting part.
3. The novel multistage oil cylinder internal supporting limiting structure according to claim 1 or 2, wherein the inner periphery of the limiting ring is provided with a second mounting part embedded into an inner periphery cylinder body, and the cylinder body is provided with a second embedded mounting groove in a surrounding mode corresponding to the second mounting part.
4. The novel multi-stage cylinder internal support limit structure according to claim 1 or 2, wherein the axial length of the sliding block is greater than the axial length of the limit ring.
5. The novel multi-stage cylinder internal supporting and limiting structure according to claim 1 or 2, wherein the limiting ring is arranged corresponding to the stop ring on the inner wall of the outer Zhou Gang cylinder.
6. The novel multistage oil cylinder internal supporting and limiting structure according to claim 1 or 2, wherein the cylinder body positioned at the periphery is an outer cylinder body, the rest cylinder bodies are telescopic piston cylinders, two groups of supporting and limiting assemblies are arranged between two adjacent piston cylinders, and the two groups of supporting and limiting assemblies are arranged symmetrically up and down.

Description

Novel multistage hydro-cylinder internal support limit structure Technical Field The utility model belongs to the field of oil cylinders, and particularly relates to a novel internal supporting and limiting structure of a multi-stage oil cylinder. Background In the prior art, the inner piston structure of the multistage cylinder generally comprises a sliding block and a limiting ring, wherein the sliding block is used for radially supporting each stage of cylinder barrel, the limiting ring is used for limiting the axial movement of the cylinder barrel, and the sliding block and the limiting ring are combined to ensure that the cylinder barrel moves in a required stroke. In terms of hardness, the limiting ring is higher than the sliding block in the cylinder operation process, the sliding block is directly contacted with the inner wall of the cylinder, and the limiting ring is not contacted with the cylinder, otherwise, the cylinder is damaged. The existing multistage cylinder internal piston structure has the defects that 1, the existing structure sliding block is separated from the limiting ring and has a certain distance, when the cylinder is subjected to larger unbalanced load force, and the cylinder barrel deflects to one side, the limiting ring contacts the cylinder barrel with a certain probability under the comprehensive factors such as deflection angle, plastic deformation of the cylinder barrel, abrasion of the sliding block and the like, so that the inner wall of the cylinder barrel is damaged, 2, scrap iron generated after the limiting ring damages the inner wall of the cylinder barrel can influence the whole hydraulic system, the sealing ring is damaged to cause oil leakage, and even important parts such as a pump valve and the like in the system are damaged. Disclosure of utility model The utility model aims to provide a novel multi-stage oil cylinder internal supporting limiting structure, the whole length of the section of a novel sliding block is increased, and the novel limiting ring is designed in a contact mode with the sliding block, so that the phenomenon that the limiting ring damages the inner wall of a cylinder barrel due to deflection of the cylinder barrel body is avoided. The novel multi-stage cylinder internal supporting and limiting structure comprises a plurality of coaxially arranged cylinder bodies, wherein an inner Zhou Gang cylinder body is correspondingly arranged with an adjacent outer Zhou Gangtong cylinder body, at least one group of supporting and limiting components are arranged between the two inner and outer adjacent cylinder bodies, each supporting and limiting component comprises an annular sliding block and a limiting ring, the sliding blocks and the limiting rings are sleeved on the corresponding cylinder bodies, the lower ends of the sliding blocks are wedge-shaped, the upper ends of the limiting rings are wedge-shaped, the lower ends of the sliding blocks are attached to the upper ends of the limiting rings, the sliding blocks press the lower limiting rings, the outer diameter of the sliding blocks is larger than that of the limiting rings, the sliding blocks are in contact with the inner walls of the peripheral cylinder bodies, and the spacing is reserved between the limiting rings and the peripheral cylinder bodies. The telescopic cylinder body is used for the multistage cylinder, when the multistage cylinder works, when pressure oil enters from the rodless cavity, the cylinder body with the largest effective area of the piston cylinder starts to extend, when the piston cylinder reaches the end point, the cylinder body with the next effective area of the piston cylinder starts to extend, the telescopic piston cylinder sequentially extends from large to small, a long working stroke can be obtained, and the smaller the effective area of the extended cylinder body is, the faster the extending speed is. Compared with the prior art, the sliding block has the beneficial effects that the sliding block adopts an asymmetric design, the whole length of the section of the sliding block is increased, the wall thickness of the shoulders at two ends of the sliding block is thickened instead of sharp angles, the novel limiting ring adopts a contact design with the sliding block, one end of the sliding block adopts a wedge-shaped design to be matched with the limiting ring which is mutually in a wedge-shaped design so as to stably press the limiting ring below the sliding block, the lengthened sliding block has larger contact area with the inner wall of the cylinder barrel, the anti-bias capacity is increased, the deflection angle generated when the sliding block is subjected to bias force is reduced, the sliding block is designed when the sliding block is contacted with the limiting ring, and the sliding block compacts the limiting ring before contacting the inner wall of the cylinder barrel even if deflection occurs, so that damage is avoided. As a further improvement of