Holding head telescopic structure of car lifting jack

Abstract

The invention discloses a holding head telescopic structure of a car lifting jack. The holding head telescopic structure comprises a bracket and a holding head horizontally arranged within the bracket; the bracket comprises two side plates arranged to directly face each other and parallel to each other and a supporting mechanism for connecting the side plates; the holding head comprises two edge plates arranged on the inner sides of the two side plates, correspondingly; and one ends, facing a working side of the car lifting jack, of the edge plates are connected with holding blocks. The holding head telescopic structure is characterized in that a rack is horizontally mounted on one edge plate; a rotating shaft is arranged on the bracket in a direction perpendicular to the side plates and a gear engaged with the rack is fixed on the rotating shaft; and one end of the rotating shaft penetrates through the side plates of the bracket to be coaxially connected with a circular turning handle. The holding head telescopic structure of the car lifting jack has the advantages of simple structure, easiness in manufacture, wide application range, convenience in adjustment and fixation, capability of favorably improving safety of a car lifting jack system, and the like.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a telescoping structure for a support head of a crane. Background technique [0002] With the rapid development of the city, the traditional highway traffic has become extremely congested, and it is difficult to meet people's requirements for commuting and traveling. Rail transit has been vigorously developed due to the advantages of large carrying capacity at one time, many operating shifts, and collective control without congestion. [0003] In order to ensure the safety of rail traffic, after the rail vehicle has been running for a period of time, it is necessary to overhaul or replace the wheel set in the bogie and other parts of the vehicle bottom. During maintenance, the entire group of vehicles needs to be lifted to a certain height in order to replace the vehicle bottom. Bogies and other components. [0004] When overhauling, it is necessary to separate the carriage from...

AI Technical Summary

Problems solved by technology

[0004] When overhauling, it is necessary to separate the carriage from the chassis by means of fixed lifting equipment or overhead cranes in order to overhaul the vehicle, and the overhauled vehicle is often moved and shifted, which requires multiple fixed lifting equipment or overhead cranes to be set up in the maintenance workshop. Cars reduce the effective working area of ​​the workshop and increase the equipment, especially when multiple vehicles need to be repaired, each car needs to be moved and shifted, so the maintenance time of the vehicle is long, the equipment is occupied, and the efficiency is low. And it is easy to cause bumping of the vehicle, damage to the outer surface and certain unsafe hidden dangers due to hoisting, which will affect safe production and increase maintenance costs. Moreover, when using fixed lifting equipment to lift or lower the carriage, it cannot really achieve linkage and synchronization. Rise or fall at the same time, prone to accidents

Images