Construction machinery with counterweight and counterweight locking device

Abstract

The invention discloses a balancing weight locking device, which is used in engineering machinery, and comprises a balancing weight lifting oil cylinder; the piston rod (1) of the balancing weight lifting oil cylinder further includes a first rod section (12) located at the top end of the piston body (2) And the second rod segment (11) that is positioned at described piston body (2) bottom end, the sidewall of first rod segment (12) is provided with groove (122); The side wall is provided with a radially arranged pin hole, in which a locking pin (6) is installed; the locking pin (6) can reciprocate along the axial direction of the pin hole, so as to be selectively inserted into the groove (122) and then The axial position of the piston cylinder (3) and the piston rod (1) is locked; the invention also discloses a construction machine comprising the above-mentioned balance weight locking device. The balancing weight locking device and construction machinery provided by the invention can reduce the required installation space of the locking device on the basis of ensuring the reliability of balancing weight 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...

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

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