Construction machinery with counterweight and counterweight locking device
A locking device and construction machinery technology, applied to cranes, etc., can solve problems such as balance weight falling, leakage, and affecting the reliability of combined balance weight locking, and achieve the effects of reducing space, avoiding potential safety hazards, and compact structure
Inactive Publication Date: 2011-12-07
SANY AUTOMOBILE MFG CO LTD
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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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[0034] 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.
[0035] 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.
[0036] 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.
[0037] Such as figure 2 As shown, in a specific embodiment, the counterweight lockin...
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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...
Claims
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IPC IPC(8): B66C23/72
Inventor 李涛
Owner SANY AUTOMOBILE MFG CO LTD