Bidirectional step-by-step telescopic electric cylinder and tyre crane

Abstract

The invention discloses a bidirectional step-by-step telescopic electric cylinder and a tyre crane. The telescopic electric cylinder comprises a motor, a speed reducer, a gearbox assembly, a first-stage lead screw, a left telescopic cylinder assembly, a right telescopic cylinder assembly and a connecting fish lug, wherein the speed reducer is rotationally connected with the output end of the motor; the gearbox assembly comprises a gear box and a transmission gear set, the transmission gear set is rotationally arranged in the gear box, and the transmission gear set is fixedly connected with thespeed reducer; the first-stage lead screw is divided into a first-stage lead screw left-hand end, an optical axis and a first-stage lead screw right-hand end, the optical axis is located in the gearbox and is fixedly connected with the transmission gear set, the screw-in direction of the first-stage lead screw left-hand screw end and the first-stage lead screw right-hand end are opposite in rotation direction; the left telescopic cylinder assembly is rotationally arranged on the first-stage lead screw left-hand end; the right telescopic cylinder assembly are arranged on the first-stage leadscrew right-hand end of the in a rotating mode; the connecting fish lug is fixedly arranged at the end of the left telescopic cylinder assembly and the end of the right telescopic cylinder assembly; and the left telescopic cylinder assembly and the right telescopic cylinder assembly are in mirror symmetry and are of a multi-layer concentric nested structure. The electric cylinder can stretch and contract in a bidirectional mode.

Description

technical field [0001] The invention relates to a telescopic electric cylinder, in particular to a bidirectional stepwise telescopic electric cylinder and a tire crane. Background technique [0002] The tire crane is a boom rotating crane that uses a tire-type chassis to walk. It installs the lifting mechanism on a special chassis composed of heavy-duty tires and axles. The upper structure is basically the same as that of a crawler crane. The tire crane is composed of two parts, the upper car and the lower car. Connect with slewing bearing between getting off the car. In order to ensure the stability of the fuselage during the installation operation, the crane is equipped with four symmetrical telescopic outriggers in pairs to ensure the stability of the fuselage during the installation operation. [0003] On the flat ground, the outriggers can be used for hoisting with small lifting capacity and driving at low speed. When hoisting, it is generally necessary to lower the ...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a two-way step-by-step telescopic electric cylinder and a tire crane. The telescopic electric cylinder solves the problem that the existing one-way telescopic electric cylinder can only expand in one direction, and can not only expand in two directions, but also realize step-by-step expansion

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