Automatic tensioning device for traction rope of tower crane load-carrying trolley and tower crane

Abstract

The invention relates to the field of tower cranes, and discloses an automatic tensioning device for a traction rope of a tower crane load-carrying trolley and a tower crane. The automatic tensioning device comprises a ratchet mechanism and a movable collision block, wherein the ratchet mechanism is mounted on the load-carrying trolley and used for winding the traction rope; the movable collision block is hinged to an arm frame of the tower crane; the movable collision block and the ratchet mechanism are configured in the way that when the load-carrying trolley moves forwards along the arm frame and the ratchet mechanism makes contact with the movable collision block, the movable collision block can drive the ratchet mechanism to tension the traction rope; and when the load-carrying trolley moves reversely along the arm frame and the ratchet mechanism makes contact with the movable collision block, the ratchet mechanism can drive the movable collision block to rotate, so that the situation that the movable collision block stops the load-carrying trolley from moving reversely is avoided. According to the technical scheme, the operation safety and convenience of traction rope tensioning operation are improved.

Description

technical field [0001] The invention relates to the field of tower cranes, in particular to an automatic tensioning device for a traction rope of a trolley of a tower crane, and further, the invention also relates to a tower crane. Background technique [0002] The tower crane includes the jib and the trolley installed on the jib. After the trolley is used for a period of time, the traction rope (usually the luffing wire rope) on it is prone to loosen. When the slack is certain, the safety brake of the trolley The upper swing interferes with the boom web, which may easily cause damage to the trolley and the boom web. Moreover, after the traction rope is loose, the amplitude limit of the trolley will be inaccurate, which will affect the accurate positioning of the width of the trolley, and then affect the accurate positioning of the hanging object. [0003] Therefore, after using for a period of time, the traction rope needs to be manually tensioned. The staff need to climb ...

AI Technical Summary

Problems solved by technology

[0002] The tower crane includes the jib and the trolley installed on the jib. After the trolley is used for a period of time, the traction rope (usually the luffing wire rope) on it is prone to loosen. When the slack is certain, the safety brake of the trolley Swing upwards, which interferes with the web of the boom, which may easily cause damage to the trolley and the web of the boom

Moreover, after the traction rope is loose, the amplitude limit of the trolley will be inaccurate, which will affect the accurate placement of the trolley, and then affect the accurate placement of the hanging objects.

[0003] Therefore, after using for a period of time, the traction rope needs to be manually tensioned. The staff need to climb up the tower crane, and remove the tension wrench and the ratchet lock pin of the trolley, manually tension the ratchet of the trolley, and operate Insecure and time consuming

Therefore there is inconvenience and unsafe problem in existing tensioning mode

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