The invention relates to a hoisting device of a crane, a pulley beam of the crane and the crane. The hoisting device comprises a first fixed pulley unit, a second fixed pulley unit, a first swinging transmission piece and a second swinging transmission piece, wherein the first fixed pulley unit and the second fixed pulley unit are arranged side by side; the axes of the first swinging transmission piece and the second swinging transmission piece are parallel to those of the first fixed pulley unit and the second fixed pulley unit; a middle connecting piece used for enabling the first swinging transmission piece and the second swinging transmission piece to synchronously swing is connected between the first swinging transmission piece and the second swinging transmission piece; a first rope connecting point and a second rope connecting point are arranged on the first swinging transmission piece and the second swinging transmission piece respectively, and each rope connecting point is connected with a corresponding rope tip to drive the corresponding swinging transmission piece to swing towards the higher-speed side of the rope tip; a rope is broken from a balancing section, and the rope tips formed by breaking are connected to the first rope connecting point and the second rope connecting point respectively. The hoisting device can play a balancing function of a balancing pulley in the prior art, bearing loss of a moving pulley unit and a weight during the breaking of the rope can be avoided, and the security coefficient is improved.
Hoisting device of crane, pulley beam of crane and crane
08.04.2015
Patent
Elektronische Ressource
Englisch
IPC: | B66D Haspeln , CAPSTANS |
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