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CN-224214487-U - Cylinder body assembly of wear-resistant hydraulic cylinder

CN224214487UCN 224214487 UCN224214487 UCN 224214487UCN-224214487-U

Abstract

The utility model discloses a cylinder body assembly of a wear-resistant hydraulic cylinder, which relates to the technical field of hydraulic cylinders and is technically characterized by comprising a cylindrical cylinder body coaxially sleeved, wherein the cylinder body sequentially comprises an outer layer, a middle buffer layer and an inner wear-resistant layer from outside to inside, the outer layer and the middle buffer layer are connected through structural engagement of axial protrusions and axial grooves, an annular uniformly distributed honeycomb-shaped shock absorption cavity is arranged in the middle buffer layer, the shock absorption cavity is a hexagonal columnar cavity, and a plurality of annular uniformly distributed axial wear-resistant ribs are arranged on the inner wall of the inner wear-resistant layer.

Inventors

  • XU FEILONG
  • ZHANG PENGFEI

Assignees

  • 泰兴欧曼液压科技有限公司

Dates

Publication Date
20260508
Application Date
20250625

Claims (5)

  1. 1. A cylinder body assembly of a wear-resistant hydraulic cylinder is characterized by comprising a cylindrical cylinder body (1) which is coaxially sleeved, wherein the cylinder body sequentially comprises an outer layer (101), a middle buffer layer (102) and an inner wear-resistant layer (103) from outside to inside, the outer layer (101) and the middle buffer layer (102) are connected with an axial groove (202) through structural engagement of an axial bulge (201), annular uniformly distributed honeycomb-shaped shock absorption cavities are arranged in the middle buffer layer (102), the shock absorption cavities are hexagonal columnar cavities, and a plurality of annular uniformly distributed axial wear-resistant ribs (3) are arranged on the inner wall of the inner wear-resistant layer (103).
  2. 2. The cylinder body assembly of the wear-resistant hydraulic cylinder, according to claim 1, is characterized in that the outer layer (101) is made of 40Cr alloy steel with tensile strength being more than or equal to 800MPa, the middle buffer layer (102) is made of 6061-T6 aluminum alloy or TC4 titanium alloy with damping coefficient being more than or equal to 0.15, and the inner wear-resistant layer (103) is made of 38CrMoAlA nitriding steel or a bimetal composite lining structure with surface hardness being more than or equal to HRC 55.
  3. 3. A cylinder body assembly of a wear-resistant hydraulic cylinder as set forth in claim 2, wherein an annular reinforcing rib (4) is arranged on the outer surface of the outer layer (101), the cross section of the reinforcing rib (4) is T-shaped, and the reinforcing rib (4) and the outer layer (101) are integrally cast.
  4. 4. A cylinder block assembly of a wear resistant hydraulic cylinder as claimed in claim 3, characterized in that a wave-shaped transition structure layer (5) is arranged between the outer layer (101) and the inner wear resistant layer (103).
  5. 5. A cylinder block assembly of a wear resistant hydraulic cylinder as set forth in claim 4, wherein said wave transition structure layer (5) is made of 0Cr18Ni9 stainless steel or 3J1 elastic alloy.

Description

Cylinder body assembly of wear-resistant hydraulic cylinder Technical Field The utility model relates to the technical field of hydraulic cylinders, in particular to a cylinder body assembly of a wear-resistant hydraulic cylinder. Background The performance of a hydraulic cylinder as an important executive component in a hydraulic system directly affects the stability and reliability of the whole hydraulic system. Hydraulic cylinders are usually composed of cylinder barrels, pistons, seals and other key components, wherein the cylinder barrels are used as core components for bearing pressure and transmitting power, and the wear resistance and mechanical strength of the inner walls of the cylinder barrels are particularly important. The wear resistance of the inner wall of the cylinder barrel is directly related to the service life and the working efficiency of the hydraulic cylinder. In the working process of the hydraulic oil cylinder, frequent friction can be generated between the piston and the inner wall of the cylinder barrel, and if the abrasion resistance of the inner wall of the cylinder barrel is insufficient, the inner wall of the cylinder barrel is seriously worn, so that the sealing performance and the movement precision of the hydraulic oil cylinder are affected. In addition, the abrasion also increases the leakage quantity of the hydraulic cylinder and reduces the working efficiency of the hydraulic cylinder. Therefore, improving the wear resistance of the inner wall of the cylinder barrel is an important consideration in the design of the hydraulic cylinder. In addition to the wear resistance, the mechanical strength of the cylinder is also not negligible. When the hydraulic cylinder works, the hydraulic cylinder needs to bear larger pressure and impact force, and if the mechanical strength of the cylinder barrel is insufficient, the hydraulic cylinder can deform or even break, so that the hydraulic cylinder fails. Therefore, the material selection, the manufacturing process and the structural design of the cylinder barrel all need to fully consider the requirements of mechanical strength. Currently, there are several techniques that attempt to improve the wear resistance and mechanical strength of hydraulic cylinder barrels. For example, CN202220033080.0 patent proposes a high lubrication wear resistant cylinder barrel which improves the wear resistance of the inner wall of the barrel by special design and material selection. However, although this cylinder tube has significantly improved wear resistance, it is relatively weak in mechanical strength. Disclosure of Invention In order to solve the technical problems, the utility model aims to provide a cylinder body assembly of a wear-resistant hydraulic cylinder, which ensures wear resistance, improves mechanical strength of a cylinder barrel and ensures service life. In order to achieve the above purpose, the present utility model provides the following technical solutions: A cylinder body assembly of a wear-resistant hydraulic cylinder comprises a cylindrical cylinder body which is coaxially sleeved, wherein the cylinder body sequentially comprises an outer layer, a middle buffer layer and an inner wear-resistant layer from outside to inside, the outer layer and the middle buffer layer are connected through structural engagement of axial protrusions and axial grooves, annular uniformly distributed honeycomb-shaped shock absorption cavities are arranged in the middle buffer layer, the shock absorption cavities are hexagonal columnar cavities, a plurality of annular uniformly distributed axial wear-resistant ribs are arranged on the inner wall of the inner wear-resistant layer, the wear-resistant capability is guaranteed, the mechanical strength of the cylinder barrel is improved, and the service life of the cylinder barrel is guaranteed. Preferably, the outer layer is made of 40Cr alloy steel with tensile strength more than or equal to 800MPa, the middle buffer layer is made of 6061-T6 aluminum alloy or TC4 titanium alloy with damping coefficient more than or equal to 0.15, and the inner wear-resistant layer is made of 38CrMoAlA nitriding steel or a bimetal composite lining structure with surface hardness more than or equal to HRC55, so that mechanical strength is ensured. Preferably, the outer surface of the outer layer is provided with annular reinforcing ribs, the cross section of each reinforcing rib is T-shaped, and the reinforcing ribs and the outer layer are integrally cast and formed, so that the mechanical strength is improved. Preferably, a wave-shaped transition structure layer is arranged between the outer layer and the inner wear-resistant layer, so that the mechanical strength is further improved. Preferably, the wave-shaped transition structure layer is made of 0Cr18Ni9 stainless steel or 3J1 elastic alloy, has certain elasticity and improves the buffering capacity. The utility model has the following beneficial effects: The w