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A bottom buffer hydraulic cylinder

A hydraulic cylinder and buffer spring technology, applied in the field of hydraulic parts, can solve the problems of hydraulic cylinder wall deformation, affecting service life, etc., and achieve the effects of avoiding stress, preventing impact, and improving stability

Active Publication Date: 2018-10-23
TIANJIN SHUANGXIANG ENG HYDRAULICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the hydraulic cylinder is used for a long time, the piston frequently forms an impact on the hydraulic cylinder during the working process, and at the same time, the high-frequency friction will generate a lot of heat, causing local deformation of the hydraulic cylinder wall, which seriously affects the service life

Method used

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  • A bottom buffer hydraulic cylinder
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Such as Figure 1-4 As shown, this embodiment provides a bottom buffer hydraulic cylinder, including a cylinder body, a cylinder head 2, a bolt pipe 3, a piston 4, a piston rod 5 and a buffer device; A cavity 1, an inner wall 11, a first heat dissipation layer 12, an outer wall 13 and a second heat dissipation layer 14 are provided in sequence on the outside; the first heat dissipation layer 12 is a cylindrical structure, which is detachably installed between the inner wall 11 and the outer wall 13 In the annular slot 15 between; the side wall of the first heat dissipation layer 12 is provided with multiple sets of threaded holes; the outer wall 13 is provided with through holes 16 corresponding to the connecting holes; the second heat dissipation layer 14 is cylindrical structure, which is nested on the outer wall 13 of the cylinder; the side wall of the second heat dissipation layer 14 is provided with a connecting hole 17 corresponding to the through hole 16; the bol...

Embodiment 2

[0020] Such as Figure 1-4 As shown, this embodiment provides a hydraulic cylinder, different from Embodiment 1, the first heat dissipation layer 12, the second heat dissipation layer 14 and the bolt tube 3 are all made of copper metal; the piston rod 51 A protruding positioning bar 53 is provided on the side wall of the cylinder head 2; a plurality of annular cooling grooves are provided on the top of the cylinder head 2.

Embodiment 3

[0022] Such as Figure 1-4 As shown, this embodiment provides a hydraulic cylinder, different from Embodiment 2, the buffer device includes three buffer springs, the first buffer spring 31, the second buffer spring 32 and the third buffer spring 33; The first buffer spring 31, the second buffer spring 32 and the third buffer spring 33 are concentrically arranged, and the diameter and height gradually decrease from the outside to the inside; and the height of the first buffer spring 31, the second buffer spring 32 and the third buffer spring 33 The ratio is 3:2:1.

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Abstract

The invention provides a bottom buffer type hydraulic cylinder. The bottom buffer type hydraulic cylinder comprises a cylinder body, a cylinder cover, bolt pipes, a piston, a piston rod and a buffer device. The cylinder body is of a metal cylindrical structure, and a cavity, an inner wall, a first heat dissipation layer, an outer wall and a second heat dissipation layer from inside to outside. The first heat dissipation layer is of a cylindrical structure and detachably installed in an annular inserting groove between the inner wall and the outer wall. A plurality of sets of threaded holes are formed in the side wall of the first heat dissipation layer, and through holes corresponding to connecting holes are formed in the outer wall of the first heat dissipation layer. The second heat dissipation layer is of a cylindrical structure and embedded onto the outer wall of the cylinder body in a sleeving mode, and the connecting holes corresponding to the through holes are formed in the side wall of the second heat dissipation layer. The bolt pipes penetrate through the connecting holes and the through holes and are installed in the threaded holes of the first heat dissipation layer. The cylinder cover is fixed to one end of the cylinder body, a sliding hole matched with the piston rod is formed in the cylinder cover, the buffer device comprises a plurality of concentrically-arranged buffer springs with different diameters and at the bottom of the cavity body, and the heights of all the springs are gradually reduced from outside to inside.

Description

technical field [0001] The invention relates to the technical field of hydraulic parts, in particular to a bottom buffer hydraulic cylinder. Background technique [0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has simple structure and reliable operation. When it is used to realize reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is stable, so it is widely used in various mechanical hydraulic systems. When the hydraulic cylinder is used for a long time, the piston frequently forms an impact on the hydraulic cylinder during the working process. At the same time, the high-frequency friction will generate a large amount of heat, causing local deformation of the hydraulic cylinder wall and seriously affecting the service life. Contents of the invention [0003] In order to achieve the above object, the presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/14F15B15/22
CPCF15B15/1423F15B15/1428F15B15/1457F15B15/22
Inventor 吕技选
Owner TIANJIN SHUANGXIANG ENG HYDRAULICS