Automatic resetting multi-level-cylinder type track raising or shifting device

Abstract

The invention discloses an automatic resetting multi-level-cylinder type track raising or shifting device, which belongs to the track raising or shifting apparatus for laying, overhaul, medium repair, maintenance and other kinds of construction of railway lines. The automatic resetting multi-level-cylinder type track raising or shifting device comprises a base (1), a hand pump component (2), a multi-level hydraulic cylinder, a shifting rod (6) and a track raising wheel (9), wherein the lower end of the piston rod (13) of the hydraulic cylinder is vertically fixed on the base (1), the middle part of the shifting rod (6) is symmetrically arranged on the two sides of a first-level cylinder body (10) through a hinge shaft I (16), one end of the shifting rod (6) is provided with the track raising wheel (9), the other end of the shifting rod (6) is hinged with a balancing scaffold, the balancing rack can adopt three implementation types, a hinge bar type rod component, an arc-shaped rod and a movable scaffold, one end of a hinge rod II (5) of the hinge bar type rod component is hinged with the shifting rod (6), one end of a hinge rod I (4) is hinged with a connecting body (3) through a hinge shaft II (17); the lower end of the connecting body (3) is vertically fixed on the base (1); and a cylinder resetting tension spring is arranged between the sleeve and the piston of the hydraulic cylinder.

Description

technical field [0001] The invention relates to a road-building tool, in particular to a track lifting or clearing tool used in construction operations such as laying railway lines, major and medium repairs, and maintenance. Background technique [0002] There are two kinds of track pullers that are used now, the rack type and the hydraulic type. Among them, the advantage of the rack-type track guide is that it has a large amount of track, but the disadvantage is that the static height of the track guide is too high, exceeding the use standards of the Ministry of Railways "Railway Technical Management Regulations" and "Railway Works Safety Rules", and cannot be used in the railway industry. Used on operating lines. The track puller cannot be automatically reset, especially under load-bearing conditions, and sometimes the teeth slip, causing the track puller to injure people. Hydraulic track lifters are all single-stage hydraulic cylinders, most of which have a track height...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above technical problems, the present invention provides an automatic reset multi-stage cylinder track shifter. In order to quickly reset the multi-stage hydraulic cylinders, a return spring is arranged between the cylinder body and the piston of each stage; in order to solve the partial load of the multi-stage cylinder , using a variety of balance force frames; the hinge shaft II is placed above the horizontal line of the rocker seat of the hand pump, this is to expand the range of motion of the balance force bar with the expansion and contraction of the multi-stage hydraulic cylinder, and to change the ratio of the power arm to the resistance arm , so as to reduce the bearing capacity of the hydraulic cylinder; in order to increase the jacking speed of the multi-stage hydraulic cylinder under light load and reduce the operating force of the handle under heavy load, an automatic control valve is used to control the working state of part of the plunger pump according to the oil pressure

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