Anti- rope-breaking protection device for heavy-load trolley

Abstract

The invention discloses an anti-rope-breaking protection device for a heavy-load trolley. The anti-rope-breaking protection device comprises a brake lever (2) and a weight mounted at the tail of the brake lever (2), wherein a pulley block (3) is further arranged at the end in which the weight is arranged; a traction steel wire rope penetrates through a clamping grove of a pulley of the pulley block (3), and can drive the pulley to rotate in a normal working process; and an anti-releasing shaft (4) transversely penetrates through the lower part of the pulley and is used for preventing the traction steel wire rope from being released from the pulley. According to the anti-rope-breaking protection device disclosed by the invention, one nylon pulley block is additionally arranged and the traction steel wire rope can relatively move in a pulley groove; and the abrasion degree caused by the direct contact friction of the traction steel wire rope and the anti-rope-breaking device is greatly reduced and the possibility that the steel wire rope is abraded to be broken is effectively avoided.

Description

technical field [0001] The invention relates to an anti-broken rope protection device, which is especially suitable for the trolley of a tower crane. Background technique [0002] The trolley of the tower crane suddenly breaks due to some reason during the luffing motion. Under the action of the gravity and inertia of the hoisted object, the trolley will continue to run out of control, and the hoisted object will fall rapidly, which is very likely to cause an accident. Therefore, the trolley must be equipped with an anti-broken rope protection device, which can prevent the trolley from running out of control when the traction wire rope suddenly breaks during the luffing motion of the trolley. Since the trolley can move forward or backward along the lower chord of the boom (the movement toward the arm end of the boom is the front), in order to effectively prevent the trolley from moving after accidentally breaking the rope, this protection is provided at the front and rear be...

AI Technical Summary

Problems solved by technology

[0004] However, when the existing anti-broken rope protection devices play the role of rope broken protection, they fail to consider adding protective measures such as avoiding the wear of the luffing steel wire rope.

like image 3 , in this structural form, the upper rod of the rectangular ring (21) is always in contact with the steel wire rope. During the movement of the trolley (1), the steel wire rope will always contact and wear with the rectangular ring (21), and the rectangular ring (21) starts to be The steel pipe or round steel is directly bent and made without any smoothing or lubrication measures on the surface. Over time, the steel wire rope will be relatively damaged, resulting in the phenomenon of wear and tear of the steel wire rope and reducing the service life of the steel wire rope.

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