Trailer wagon tensioning device for large-size tower crane

Abstract

The invention discloses a trailer wagon tensioning device for a large-size tower crane. The device comprises a fixing frame which is arranged between two balance arms and composed of a transverse beam frame and a longitudinal beam frame; the transverse beam frame is constituted by two transverse beams which are arranged in parallel, wherein the two ends of each transverse beam are fixedly connected with the balance arms at the corresponding ends respectively; the longitudinal beam frame is constituted by two longitudinal beams which serve as rails, wherein the two ends of each longitudinal beam are fixedly connected with the transverse beams of the corresponding ends respectively; a movable frame performing horizontal movement is arranged on the rails, a pulley set used for changing amplitude of steel wire rope tensioning and guiding is mounted on the movable frame, a hand puling block is arranged at the front end of the movable frame, and the other end of the hand pulling block is fixed to the front ends of the rails; a thrusting support is arranged at the positions, behind the movable frame, of the rails, and an adjusting assembly used for conducting fine adjustment on the front-rear position of the movable frame is arranged on the thrusting support. By means of the trailer wagon tensioning device, the problem of tensioning of an amplitude-variation rope of the large-size or an ultra-large-size tower crane is solved, and the device has the advantages that safety is achieved, labor is saved, adjustment is convenient to conduct, the structure is subjected to small force, tensioning is reliable, and continuous fine adjustment can be conducted.

Description

technical field [0001] The invention relates to a tensioning device for a traction trolley of a large tower crane. Background technique [0002] In the trolley luffing tower crane, the luffing steel wire rope will be loose and drooping during installation and use, which will affect the normal operation of the tower crane, so it is necessary to install a tensioning device in its luffing system. [0003] Common luffing tensioning devices are as follows: One is a tensioning device with a ratchet wheel suitable for installation on small and medium-sized tower crane trolleys. This device has a shaking steering wheel. To tension, the ratchet prevents tension failure caused by shaft reversal. For large and ultra-large tower cranes, the luffing steel wire ropes are generally large in diameter, heavy in weight, and large in traction force. If this tensioning device continues to be used, not only will the operator not be able to shake the handle during operation, but the ratchet devi...

AI Technical Summary

Problems solved by technology

This device often utilizes the principle of "effort and distance" of the multi-rate pulley block to realize the tensioning of several times the length of the luffing rope in a short distance, but it doubles the difficulty of the tensioning operation, it is difficult to move manually, and the structure is relatively complicated. Due to the plug-in pin structure, it cannot be continuously tensioned, so it is simply not used on general tower cranes, and the tensioning device is useless

Images