Crane and hoisting mechanism thereof

Abstract

The invention discloses a hoisting mechanism. When the hoisting mechanism is in a rising mode or a falling mode, a speed reducer motor functions in driving, a clutch is closed, and the output shaft of the speed reducer motor is connected with a winding drum by use of a planetary gear mechanism and drives the winding drum t rotate; when the hoisting mechanism is in a free hook dropping mode, the speed reducer motor stops, the clutch is opened, the winding drum drives the planetary gear mechanism to speed up so as to drive a brake hub to rotate, and then the stop of the rotation of the winding drum is realized at last by use of a brake. According to the hoisting mechanism, when the hoisting mechanism is located at the braking phase of the free hook dropping mode, due to speeding up of the planetary gear mechanism, the rotating speed of the brake hub is greatly increased and the braking torque of the brake is quickly reduced, and therefore, the volume of the brake hub is remarkably reduced and the braking capacity of the brake is enhanced. According to the technology, the mounting space is reduced, and the hoisting mechanism is enabled to hoist more heavy materials and drop the hook freely in the free hook dropping mode. The invention also provides an engineering machine.

Description

technical field [0001] The invention relates to construction machinery, in particular to a hoisting mechanism and a crane. Background technique [0002] With the development of construction technology, crawler cranes are more and more commonly used in foundation pile construction, and the crane is required to have a certain load-free hook function to improve work efficiency and reduce energy consumption. [0003] At present, the principle of free-falling hook hoisting widely used in construction machinery is as follows: figure 1 As shown, it is generally used for free-falling hooks with empty hooks. [0004] figure 1 The shell of the motor 1' of the middle reducer is fixedly connected with the frame. When the parking brake is closed, the ring gear is fixed. The motor of the reducer drives the sun gear Z1' of the first-stage gear to rotate, thereby driving the first-stage planetary gear to drive the planet carrier H1 rotates around the central axis. Since the primary plane...

AI Technical Summary

Problems solved by technology

In addition, the brake hub of the brake is directly connected with the reel 2'. When a larger braking torque is required, the diameter of the brake hub must be increased. Due to the limitation of the installation space, the diameter of the brake hub cannot be infinitely large, so The winch of this structure is only suitable for free-falling hooks with empty hooks or extremely light loads, and cannot be loaded with heavy objects

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