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Pin shaft

A technology of pin shaft and axis, applied in the field of hinged structure, can solve the problems of excessive clearance, unstable rock drilling arm, and inaccurate positioning of rock drill holes, and achieve the effect of eliminating clearance, improving service life and connection accuracy.

Inactive Publication Date: 2015-12-30
CHINA RAILWAY CONSTR HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, due to the inability to effectively expand and tighten the pin shaft hole of the hinge seat, an excessive gap is generated between the pin shaft and the rock drilling arm cylinder shaft hole, which causes the rock drilling arm to become unstable during the rock drilling process. , violent shaking, causing a large impact load during rock drilling, resulting in the inability to accurately position the rock drill when drilling; the hinge pin of the rock drilling arm is often broken, which seriously affects the normal production
The service life of this kind of pin is short, which increases the construction cost

Method used

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with accompanying drawing.

[0021] figure 1 The structure of pin shaft 1 in one embodiment of the present invention is shown. The pin shaft 1 includes a body 2 , an expansion sleeve 3 fitted on the body 2 , and a fixing piece 4 for relatively fixing the body 2 and the expansion sleeve 3 . The pin shaft 1 is mainly used for positioning and / or transmission between two components. It is especially suitable for the positioning and transmission between two hinged seats, and transmits the interaction force between the two hinged seats. In the following, the pin shaft 1 is installed in the pin shaft hole of the hinge seat as an example to describe in detail.

[0022] The body 2 is configured as a substantially cylindrical structure. The main body 2 is the skeleton structure of the pin shaft 1, bearing the radial shear force exerted on the pin shaft 1 by the two hinge seats respectively. The body 2 inclu...

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Abstract

The invention relates to a pin shaft. The pin shaft comprises a cylindrical body, an expanding sleeve and a fixing part. The peripheral wall at one end of the body is provided with a first slope surface, and the distance from the first slope surface to an axis of the body is gradually decreased along the direction departing from the other end of the body. The expanding sleeve comprises a sleeve body sleeving one end of the body, the inner peripheral wall of the sleeve body is provided with a second slope surface in abutting joint with and matched with the first slope surface, and the sleeve body is provided with at least one slit penetrating the sleeve body radially and extending towards two ends of the sleeve body. The fixing part is used for applying axial pressure, towards the body, on the expanding sleeve so as to enable the sleeve body to be expanded open by the first slope surface. The pin shaft is capable of eliminating gaps between pin shaft holes of hinge joint seats and the pin shaft, so that service life of the pin shaft is prolonged and connection precision of the pin shaft is improved.

Description

technical field [0001] The invention relates to a hinge structure, in particular to a pin shaft. Background technique [0002] The rock drilling jumbo is a kind of rock drilling equipment that adopts the drilling and blasting method for tunnel and underground engineering. The rock drilling arm can move and control the rock drill for precise drilling operations. However, in actual use, due to the inability to effectively expand and tighten the pin shaft hole of the hinge seat, an excessive gap is generated between the pin shaft and the rock drilling arm cylinder shaft hole, which causes the rock drilling arm to become unstable during the rock drilling process. , Shaking violently, causing a large impact load during rock drilling, resulting in the inability to accurately position the rock drill when drilling; the hinge pin of the rock drilling arm is often broken, which seriously affects the normal production. The service life of this bearing pin is short, which increases the...

Claims

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Application Information

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IPC IPC(8): F16C11/04
Inventor 刘飞香程永亮郑大桥麻成标刘在政曹亚鹏邹黎勇何二春
Owner CHINA RAILWAY CONSTR HEAVY IND
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