Buffer unit and boom rearward tilting prevention device provided with buffer unit

A buffer device and boom technology, applied in spring/shock absorber, vibration suppression adjustment, mechanical equipment, etc., can solve the problems of unstable buffer performance, damage to hydraulic components, vibration and noise of the buffer device, etc.

Active Publication Date: 2012-09-19
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing buffer device of this kind of open hydraulic system, because the oil inlet of the hydraulic system mainly adopts the way of forming negative pressure at the oil suction port to suck the hydraulic oil in the oil tank into the hydraulic cylinder, when the piston rod moves quic

Method used

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  • Buffer unit and boom rearward tilting prevention device provided with buffer unit
  • Buffer unit and boom rearward tilting prevention device provided with buffer unit
  • Buffer unit and boom rearward tilting prevention device provided with buffer unit

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Embodiment Construction

[0039] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0040] Such as figure 1 and figure 2 As shown, a buffer device is provided according to an embodiment of the present invention, the buffer device includes a piston cylinder, and the piston cylinder includes a cylinder body 1, a piston 2 arranged in the cylinder body 1 and a piston fixed on the piston 2 The piston rod 3, the piston 2 divides the space in the cylinder body 1 into a rodless cavity 11 and a rod cavity 12, wherein, within the stroke range of the piston rod 3, the rodless cavity 11 and the rod cavity The rod cavity 12 communicates with a connecting pipeline to form a closed loop, and the connecting pipeline has a damper.

[0041] Through the above...

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PUM

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Abstract

The invention discloses a buffer device which comprises a piston cylinder. The piston cylinder comprises a cylinder body (1), a piston (2) arranged in the cylinder body (1) and a piston rod (3) fixed on the piston (2); the piston (2) divides the space in the cylinder body (1) into a rod-free cavity (11) and a rod cavity (2); and within the travel range of the piston rod (3), the rod-free cavity (11) and the rod cavity (12) form a closed loop through a connecting pipeline, and a damping part is arranged on the connecting pipeline. The invention also discloses a boom reward tilting prevention device; the boom (100) is hinged on a support (200); and the reward tilting prevention device comprises the buffer device; and the piston cylinder is installed between the boom (100) and the support (200). According to the buffer device with a closed system, untimely oil absorption can not be caused, components can not be damaged easily, the noise is low, the vibration is small and stable the buffering performance is stable.

Description

technical field [0001] The present invention relates to the field of engineering machinery, in particular to an anti-backward device for a large boom of an engineering machine, and more particularly to a buffer device in the anti-backward device. Background technique [0002] The anti-backward dynamic buffer device for large-scale jibs of construction machinery provides back-tilt protection for large-scale truss arms, box-type jibs and other jibs (such as crane jibs) in construction machinery under large impact loads. [0003] The existing anti-backward device usually adopts a spring buffer device, a hydraulic buffer device or a spring-hydraulic combined buffer device. In the existing hydraulic buffer devices, a simple and easy-to-implement open hydraulic system is usually used. Existing hydraulic buffer devices generally include a piston cylinder, which includes a cylinder body, a piston disposed in the cylinder body and a piston rod fixed on the piston, and the piston sep...

Claims

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Application Information

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IPC IPC(8): F16F15/027F16F15/04B66C23/88
Inventor 李莹松魏素芬
Owner ZOOMLION HEAVY IND CO LTD
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