Raising mechanism with reel drum locking apparatus

Abstract

A lifting mechanism with a coiling drum locking device relates to the hoisting machinery. The invention overcomes the problem that the prior lifting mechanism can not move a gear change hand lever to realize speed change even in the state of idle load; moreover, parts can not be replaced or examined and repaired. The lifting mechanism comprises a coiling drum of which the coiling drum locking device is arranged beside a bearing seat. The coiling drum locking device includes a lower pedestal, an upper pedestal, a locking shaft, a hand lever and a limit switch, wherein the lower pedestal is fixed on a moving trolley frame, the upper pedestal is connected with the lower pedestal by a bolt, a shaft hole for the locking shaft inserted is machined above the upper pedestal, a long shaft hole is also arranged on a side support plate of the coiling drum corresponding to the shaft hole position of the upper pedestal, the hand lever is arranged on the outer end of the locking shaft and the limit switch is fixed on the lower pedestal under the hand lever. The invention not only improves the security of the crane, but also facilitates the operation in site, and improves the use efficiency of the mechanism.

Description

technical field [0001] The invention relates to hoisting machinery, in particular to a hoisting (hoisting) mechanism. Background technique [0002] Existing hoisting (winch) mechanism such as figure 1 As shown, it consists of a reel 2, a reducer 3, a brake 5, a coupling 6, a motor 7, a spreader 1 and a wire rope 9. The motor 7 is connected with the reducer 3 through the coupling 6, the spreader 1 and the reel 2 are connected together by the wire rope 9, and the reel 2 is driven to rotate when the motor is energized, and the lifting operation is completed through the spreader 1. In order to improve the lifting operation efficiency, a speed change gear is provided on the speed reducer 3, and the speed change handle 4 is used for shifting. When the spreader is suspended in the air, due to the effect of the spreader and the wire rope, if there is no anti-drag of the motor 7 or the braking of the brake 5, the spreader will drop even without load, and the safety of the equipment...

AI Technical Summary

Problems solved by technology

When the spreader is suspended in the air, due to the effect of the spreader and the wire rope, if there is no anti-drag of the motor 7 or braking of the brake 5, the spreader will drop even without load, and the safety of the equipment is poor.

With the existing lifting (hoisting) mechanism, even if the spreader is under no-load condition, it is impossible to move the shifting handle to change the speed; it is also impossible to replace or repair the brake, motor, and coupling, which is inconvenient to use

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