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Construction machinery and weight counterbalance locking device thereof

A locking device and engineering machinery technology, applied in cranes and other directions, can solve the problems of balance weight falling, leakage, affecting the locking reliability of combined balance weight, etc., and achieve the effect of reducing space, avoiding potential safety hazards and compact structure

Inactive Publication Date: 2009-12-30
SANY AUTOMOBILE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] It can be seen that the sealed balance weight locking device of the balance valve will not occupy the space necessary for the balance weight assembly. However, after a period of use, the balance valve is prone to leakage, and there is a major safety hazard of the balance weight falling, which seriously affects Improved locking reliability of combined counterweight

Method used

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  • Construction machinery and weight counterbalance locking device thereof
  • Construction machinery and weight counterbalance locking device thereof
  • Construction machinery and weight counterbalance locking device thereof

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Embodiment Construction

[0035] The core of the present invention is to provide a counterweight locking device for engineering machinery, which can reduce the installation space required by the locking device on the basis of ensuring the reliability of counterweight locking. Another core of the present invention is to provide a construction machine including the above-mentioned counterweight locking device.

[0036] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Please refer to figure 2 and image 3 , figure 2 It is a structural schematic diagram of a specific embodiment of the counterweight locking device provided by the present invention, image 3 for figure 2 Partial enlarged view of part A in the middle.

[0038] Such as figure 2 As shown, in a specific embodiment, the counterweight lockin...

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Abstract

The invention discloses a weight counterbalance locking device for construction machinery. The device comprises a weight counterbalance lift cylinder, wherein a piston rod (1) of the weight counterbalance lift cylinder further comprises a first rod section (12) positioned on the top end of a piston body (2) and a second rod section (11) positioned on the bottom end of the piston body (2); the side wall of the first rod section (12) is provided with a groove (122); a pin hole is arranged on the side wall of the top end of a piston cylinder (3) of the weight counterbalance lift cylinder along the radial direction; and a locking pin (6) is arranged in the pin hole, and can axially reciprocate along the pin hole, so that the locking pin can be selectively inserted in the groove (122) to lock the axial position of the piston cylinder (3) and the piston rod (1). The invention also discloses the construction machinery comprising the weight counterbalance locking device. The weight counterbalance locking device and the construction machinery can reduce assembly space required by the locking device based on ensuring the reliability of weight counterbalance locking.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a balancing weight locking device for construction machinery. In addition, the present invention also relates to a construction machine comprising the above-mentioned balance weight locking device. Background technique [0002] With the rapid development of my country's economic construction, the market demand for large-tonnage cranes is increasing. [0003] In the prior art, in order to ensure the stability of large-tonnage cranes when hoisting heavy objects, a detachable balance weight is set on the crane; in order to further ensure the safety of the crane when hoisting heavy objects and prevent the balance weight from falling, it is generally still on the crane. Set the balance weight locking device to lock the balance weight. [0004] At present, the locking devices of the counterweight mainly include two types: the mechanical latch type and the balance valve...

Claims

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Application Information

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IPC IPC(8): B66C23/72
Inventor 李涛
Owner SANY AUTOMOBILE MFG CO LTD
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