Hydraulic cylinder for adjusting axial position of piston and cylinder body through spherical surface

A hydraulic cylinder and piston technology, applied in the field of hydraulic cylinders, can solve the problems of hydraulic cylinder power consumption increase, failure, axis position and movement direction inconsistency, etc., to achieve the effect of reducing power consumption, improving use efficiency and reliability

Inactive Publication Date: 2012-05-02
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this design, due to the processing, installation errors and operation of the hydraulic cylinder, the axis position of the hydraulic cylinder is inconsistent with the direction of movement, resulting in lateral loads in the hydraulic cylinder during work; the load borne by the hydraulic cylinder does not pass through the hydraulic cylinder. axis, causing the hydraulic cylinder to produc

Method used

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  • Hydraulic cylinder for adjusting axial position of piston and cylinder body through spherical surface
  • Hydraulic cylinder for adjusting axial position of piston and cylinder body through spherical surface
  • Hydraulic cylinder for adjusting axial position of piston and cylinder body through spherical surface

Examples

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Comparison scheme
Effect test

Example Embodiment

[0015] Example 1: see figure 1 and figure 2 The specific structure of the present invention is: a hydraulic cylinder that adjusts the position of the piston and the cylinder axis through a spherical surface, including a piston rod 1, a piston with a "concave" cross-section structure, a second sealing ring 4, and a cross-section The cylinder tube 5, the guide block 6 and the adjusting ball 7 of the "mountain"-shaped structure; wherein the piston rod 1 is connected with the piston 2, and the piston 2 is matched with the cylinder tube 5; the inner surface of the piston 2 is in clearance fit with the guide block 6 , So that the piston 2 can reciprocate along the outer ring of the guide block 6, the outer surface of the piston 2 is in contact with the second sealing ring 4 installed on the inner groove of the cylinder 5, the second sealing ring 4 is the main seal to prevent oil leakage The adjusting ball 7 is fixed on the middle protrusion of the cylinder 5, and the adjusting b...

Example Embodiment

[0018] Example 2:

[0019] See figure 1 and figure 2 , The present invention may also include a fixing sleeve 9, a first bolt 8 and a second bolt 10; the second bolt 10 fixes the piston rod 1 and the piston 2 by pressing the fixing sleeve 9 provided in the piston rod 1. There is a certain gap between the sleeve 9 and the piston rod 1; the adjusting ball 7 is fixed on the middle protrusion of the cylinder 5 by the first bolt 8.

[0020] The inner side of the cylinder tube 5 in the present invention can be designed in a special form, and the cross section of the inner side of the cylinder tube 5 is designed as a stepped tapered surface 11 to ensure that the axis of the cylinder tube 5 and the axis of the piston 2 are not Collide each other to complete the movement.

Example Embodiment

[0021] Embodiment 3: In order to prevent dust from entering, and to further prevent oil leakage, the present invention may also include a first sealing ring 3 arranged on the outside of the second sealing ring 4 to play an auxiliary sealing role, and the first sealing ring 3 is installed in the cylinder barrel 5 The inner groove is in contact with the outer surface of the piston 2.

[0022] Specifically:

[0023] The contact between the piston 2 and the piston rod 1 is a concave spherical structure. The second bolt 10 compresses the fixing sleeve 9 to connect the piston rod 1 and the piston 2. After installation, there is a certain gap between the fixing sleeve 9 and the piston rod 1. It can ensure that the axial movement of the piston rod 1 and the piston 2 can deviate from the rotation of the axis of the hydraulic cylinder; the inner surface of the piston 2 is matched with the guide block 6, and the outer surface of the piston 2 is connected with the sealing rings 3, 4 installed...

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PUM

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Abstract

The invention relates to a hydraulic cylinder for adjusting the axial position of a piston and a cylinder body through a spherical surface, which is characterized by comprising a piston rod, a piston, a second sealing ring, a cylinder barrel, a guide block and an adjusting ball, wherein the cross section of the piston is in a shape like a Chinese character 'ao', the cross section of the cylinder barrel is in a shape like Chinese character 'shan', the piston rod is connected with the piston, the piston is matched with the cylinder barrel, the surface of the inner side of the piston is in clearance fit with the guide block so that the piston can do reciprocating motion along the excircle of the guide block, the surface of the outer side of the piston is contacted with the second sealing ring arranged in the groove of the inner side of the cylinder barrel, the adjusting ball is fixed at the middle projection part of the cylinder barrel, and the adjusting ball and the incircle of the guide block are in spherical surface contact so that the guide block and the adjusting ball relatively rotate. According to the invention, the power consumption can be reduced, and the utilization efficiency and the reliability are improved.

Description

technical field [0001] The invention relates to a hydraulic cylinder which adjusts the axial positions of a piston and a cylinder body through a spherical surface. Background technique [0002] In a piston-type hydraulic cylinder, the piston moves reciprocatingly along the cylinder barrel under the action of the guide sleeve, and a sealing ring is arranged between the piston and the cylinder barrel to prevent oil leakage. In this design, due to the processing, installation errors and operation of the hydraulic cylinder, the axis position of the hydraulic cylinder is inconsistent with the direction of movement, resulting in lateral loads in the hydraulic cylinder during work; the load borne by the hydraulic cylinder does not pass through the hydraulic cylinder. axis, causing the hydraulic cylinder to produce eccentric loads during work (the self-weight of the long hydraulic cylinder piston rod may also produce eccentric loads). The lateral load and partial load caused by the...

Claims

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Application Information

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IPC IPC(8): F15B15/14F15B15/20
Inventor 李勇鹏王宇航赵玉良张帆崔冬
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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