Lifting appliance rotating mechanism, lifting appliance and reach stacker

Abstract

The invention provides a lifting appliance rotating mechanism which comprises an upper rotary table 1 and a lower rotary table 2, wherein the rotation centers of the upper rotary table 1 and the lower rotary table 2 are coincided at the point O; the lifting appliance rotating mechanism further comprises a slewing bearing 3, a first oil cylinder 4 and a second oil cylinder 5; the upper rotary table 1 is connected with the lower rotary table 2 by the slewing bearing 3; a piston rod extending end of the first oil cylinder 4 and a piston rod extending end of the second oil cylinder 5 are articulated at the same point together with the lower rotary table 2; the other end of the first oil cylinder 4 and the other end of the second oil cylinder 5 are respectively articulated with the upper rotary table 1. The invention also provides a lifting appliance and a reach stacker. The lifting appliance rotating mechanism can rotate by 360 degrees, and is low in cost, high in rotation inching control accuracy and high in reliability.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a sling turning mechanism and a sling and a front hanger including the sling turning mechanism. Background technique [0002] At present, the spreader of the reach stacker generally requires the rotation angle to be +105°~-195°, that is, to realize the rotation range of 300°. In the prior art, the rotation of the spreader is mainly through the rotation of the two reducers installed outside the spreader to drive the rotation of the slewing bearing with external meshing teeth, so as to realize the rotation of the spreader; another is to use the telescopic push of the oil cylinder. The turntable rotates to realize the left and right rotation of the spreader. Two kinds of concrete installation arrangements of prior art are as follows: [0003] Such as figure 1 As shown, the boom 7 is connected to the upper turntable 1 of the spreader, the upper turntable 1 and the lower turnta...

AI Technical Summary

Problems solved by technology

Limited by space and structure, this technical solution can only rotate within a small angle range such as ±20°, and it is impossible to achieve any rotation of 360°, so its application range is greatly limited and its practicability is not strong

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