track tensioning device

Abstract

The invention discloses a crawler belt tensioning device. The crawler belt tensioning device comprises a driving wheel and an induction wheel, the driving wheel and the induction wheel are located atthe two ends of a vehicle body truss respectively, the driving wheel is located at the end, with a smaller diameter, of the vehicle body truss, and the induction wheel is hinged to the end, with a larger diameter, of the vehicle body truss through a first connecting rod. A first air spring is movably connected between the induction wheel and the vehicle body truss, and the first air spring is located at the lower end of the first connecting rod. The lower portion of the vehicle body truss is movably connected to a load-bearing wheel group, the load-bearing wheel group is movably connected to abelt pulley, and the belt pulley is hinged to the upper portion of the vehicle body truss. A crawler belt sequentially passes through the driving wheel, the belt pulley, the induction wheel and the load-bearing wheel group to form a closed structure. As the crawler belt tensioning device is arranged, when a crawler belt vehicle passes through various obstacles, the crawler belt is tensioned in real time so that the belt does not come off or break.

Description

technical field [0001] The invention relates to the technical field of crawler-tracked vehicles, in particular to a crawler belt tensioning device. Background technique [0002] In construction machinery, in order to overcome the harsh open-air working environment and changing road conditions, especially uneven roads, gravel ground, and muddy action sites, construction machinery usually uses crawler-type walking mechanisms, such as crawler-type soil dumping Machines, crawler cranes, crawler excavators and crawler bulldozers, etc., because crawler walking has a large ground area, low ground pressure, strong adhesion to the ground, and good traction, ground support and drive. The crawler-type traveling mechanism must be equipped with a crawler tensioning device, which is an important part of the crawler-type traveling mechanism, and is required to be able to adapt to complex and changeable road conditions, and its performance has a great influence on the driving performance of...

AI Technical Summary

Problems solved by technology

The advantage of hydraulic tensioning is that it can automatically tension the track in time according to the tightness of the track; the disadvantage is that the tensioning pressure is not easy to control, and when the hydraulic system fails or the hydraulic oil leaks, the tensioning pressure cannot guarantee that the track is always tensioned State, resulting in track slack, and then produce track and track frame interference wear or track derailment and other faults

The advantage of spring tension is simple structure, low manufacturing cost and maintenance cost; the disadvantage is that there is a certain proportional relationship between the elastic force of the spring and the structural size: the spring size is too small, and its elastic force is not enough to keep the track in tension; If the size of the spring is too large, the volume of the overall structure will increase accordingly. Due to the limitation of the mechanical structure of the track, it is inconvenient to design and manufacture.

The advantage of screw tensioning is that the structure is simple, easy to install and disassemble, and the cost is low; the disadvantage is that after the track is tensioned at a certain position, the screw is locked, and when the track becomes loose due to changes in road conditions, it cannot be adjusted automatically in time

The track tensioning device of traditional high-speed tracked vehicles, due to structural limitations, changes in the length of the track ring when adjusting the vehicle height in a wide range will cause the track to loosen or limit the vehicle height adjustment

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