Full hydraulic transmission-based crawler bulldozer

Abstract

The invention belongs to the technical field of mechanical engineering, and particularly relates to a full hydraulic transmission-based crawler bulldozer. The full hydraulic transmission-based crawler bulldozer consists of a bulldozer blade, a hydraulic oil cylinder, a push rod, a body, a cab, a frame, a track roller, a carrier roller, a drive sprocket, a crawler track, an engine, a variable hydraulic pump, a hydraulic motor, a crawler drive axle, a hydraulic hose and couplings, wherein the upper part of the bulldozer blade is hinged with the hydraulic oil cylinder; the wall of the hydraulic oil cylinder is fixed to the body and the cab; the lower part of the bulldozer blade is hinged with the push rod; the push rod is hinged with the frame; the frame is positioned on the crawler track through the track roller; the front part of the frame is provided with a guide roller, and the upper part of the frame is provided with the carrier roller; the engine is connected with the variable hydraulic pump through a first coupling; the variable hydraulic pump is connected with the hydraulic motor through the hydraulic hose; the hydraulic motor is connected with the crawler drive axle through a second coupling; the crawler drive axle drives the drive sprocket; and the drive sprocket is engaged with the crawler track. The engine can be flexibly arranged because the hydraulic hose for conveying hydraulic fluid has the characteristic of flexibility. The full hydraulic transmission-based crawler bulldozer realizes stepless transmission of the bulldozer in a true sense; the power of the hydraulic motor cannot be interrupted during a variable-displacement gear change; and the operation is simple.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering, and in particular relates to a crawler bulldozer based on full hydraulic transmission. Background technique [0002] Bulldozers belong to the category of shoveling and transporting machinery in the construction machinery industry. They are mainly used in earthwork construction projects such as construction, road construction, mining, water conservancy, agriculture, forestry, and national defense construction to shovel and move soil and sand. Bulldozers usually use a crawler or tire chassis as the main engine, and are equipped with a suspended blade or a six-way blade. During operation, the blade is cut into the soil and advanced by the power of the bulldozer chassis to complete the cutting and moving of the soil. Transportation (including shoveling, soil transportation, filling, leveling, loosening, etc.) operations, and sometimes as a self-propelled shovel pusher, towing rollers, ...

AI Technical Summary

Problems solved by technology

In order to solve the problems of mechanical transmission or hydraulic mechanical transmission system, the bulldozer engine is easy to overload or stall, the gearbox shifts frequently, or the relative efficiency of the transmission system is low (hydraulic mechanical transmission), etc.

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