A special railway crane

Abstract

A lorry-mounted crane special for railways comprises a rotary base, and a rotary table is disposed on the rotary base; the rotary table is connected with crane arms, and the crane arms comprise a rotation arm and a telescopic arm; the outer end of the telescopic arm is connected with a suspension-hook support arm; the lower part of the suspension-hook support arm is connected with a far-end suspension hook; a telescopic oil cylinder is connected between the rotation arm and the rotary table; the lower part of the rotary arm is provided with a slide way; an electric hoist is installed in the slide way and is capable of rolling along the slide way; and the lower part of the electric hoist is connected with a near-end suspension hook. The lorry-mounted crane special for railways is installed on a railway vehicle and is used for loading and unloading works of materials, tools and equipment needed in railway construction and maintenance. The lorry-mounted crane special for railways solves the problem that hoisting work usually needs to raise an arm. By using the lorry-mounted crane special for railways, a heavy object is directly hung on the far-end suspension hook of the suspension-hook support arm without depending on a steel wire rope for hoisting when hoisting is performed, loaded telescoping can be optionally performed through the crane arm and the heavy object can be hoisted to a needed position, also due to the fact that the lower part of the electric cucurbit is provided with the near-end suspension hook, close-range hoisting work can be realized, and blind areas do not exist in the working level scope. By using the lorry-mounted crane special for railways, the working efficiency is improved, the working height is increased, and operation is convenient.

Description

technical field [0001] The invention relates to a special lorry-mounted crane for railways, in particular to a lorry-mounted crane used in railway electrification sections. Background technique [0002] Existing truck-mounted cranes for railway vehicles generally have a telescopic boom structure. When lifting, the boom needs to be raised first, and the hook cannot be lifted until the hook moves above the heavy object. In the railway electrification section, there is a catenary above the line, and the lifting arm is easy to touch the catenary, thereby causing an electric shock. Therefore, the angle of the lifting arm is limited by the catenary, and the lifting arm cannot be too high; the lifting part of the front end of the crane is equipped with a wire rope and a pulley block Components such as hooks and hooks occupy quite a lot of space in the vertical direction, so that the distance between the hook and the ground is relatively close, and the lifting space is limited. The...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a special truck-mounted crane for railways, which solves the problems of small operating range, potential safety hazards, inconvenient operation, low efficiency, and inability to lift heavy objects at close distances in electrified section cranes.

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