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Lifting cylinder provided with internal buffer limiting device and buffer method thereof

A technology of limit device and lift cylinder, which is applied in the direction of fluid pressure actuation device, transportation and packaging, loading and unloading vehicle arrangement, etc. performance and other issues to achieve the effect of avoiding severe impact, simple structure and high reliability

Pending Publication Date: 2021-02-26
INNER MONGOLIA NORTH HAULER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the lifting cylinder of mining vehicles bears heavy loads, such a limit form is prone to severe impacts, which reduces the reliability of the lifting cylinder and the frame, thereby affecting the performance of the vehicle

Method used

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  • Lifting cylinder provided with internal buffer limiting device and buffer method thereof
  • Lifting cylinder provided with internal buffer limiting device and buffer method thereof
  • Lifting cylinder provided with internal buffer limiting device and buffer method thereof

Examples

Experimental program
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Effect test

Embodiment

[0027] Such as figure 1 As shown in -4, the lifting cylinder provided with an internal buffer and limit device includes an outer pipe assembly 3, and the inside of the outer pipe assembly 3 is slidably connected with a second pipe assembly 4, and the inside of the second pipe assembly 4 A three-tube assembly 5 is slidingly connected, a first annular cavity 10 is reserved between the outer tube assembly 3 and the second tube assembly 4, and the bottom between the outer tube assembly 3 and the second tube assembly 4 is passed through a bolt A guide sleeve 6 is installed, a second annular cavity 11 is reserved between the second pipe assembly 4 and the third pipe assembly 5, and the top between the second pipe assembly 4 and the third pipe assembly 5 is installed by bolts There is a piston 7, one end of the three-pipe assembly 5 extends to the outside of the two-pipe assembly 4, and a lowering port 2 and a lifting port 1 are respectively opened at the left and right ends of the t...

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Abstract

The invention discloses a lifting cylinder provided with an internal buffer limiting device and a buffer method thereof, and belongs to the technical field of hydraulic pumps. The lifting cylinder comprises an outer pipe assembly, a second pipe assembly is slidably connected to the interior of the outer pipe assembly, and a third pipe assembly is slidably connected to the interior of the second pipe assembly; a first annular cavity is reserved between the outer pipe assembly and the second pipe assembly, a second annular cavity is reserved between the second pipe assembly and the third pipe assembly, and a piston is installed at the top of the position between the second pipe assembly and the third pipe assembly through a bolt; and a buffer limiting device formed by combining a buffer ringand a check ring is installed at the bottom of the second pipe assembly. The lifting cylinder is provided with the internal buffer limiting device, the buffer ring of the limiting device is made of spring steel and has a good buffer effect, the buffer limiting device composed of the buffer ring and the check ring plays a good role in buffering and limiting when the lifting cylinder descends, andsevere impact generated when a carriage of a mine truck descends is avoided.

Description

technical field [0001] The invention relates to the technical field of hydraulic pumps, in particular to a lifting cylinder provided with an internal buffering and limiting device and a buffering method thereof. Background technique [0002] Off-highway mining dump truck (hereinafter referred to as mining truck) is the key transportation equipment of large open-pit mines. As the executive component of the lifting hydraulic system, the lifting cylinder is one of the key components of the lifting hydraulic system. Its performance is Whether it is good or bad determines the performance of the vehicle. Due to the long working stroke of the lifting cylinder and the limited installation space, the lifting cylinders of mining vehicles are generally two-stage or three-stage double-acting hydraulic cylinders, so that when the lifting cylinder is lowered, one or two stages must rely on its own limit device . At present, mining vehicles on the market generally use external limit lift...

Claims

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Application Information

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IPC IPC(8): F15B15/16F15B15/20F15B15/22B60P1/16
CPCB60P1/162F15B15/1404F15B15/1428F15B15/16F15B15/226
Inventor 狄志红王晓磊温春梅孟有平张波宋晗孔令新李兆华王逢全郭海全张耀斌贾占军邬青峰
Owner INNER MONGOLIA NORTH HAULER
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