Electric-hydraulic cooperative control type speed changing system for bulldozer

• Main Authors: ZHAO JIANJUN, LIU CHUNCHAO, JIN KE, HAN JIBIN, JIANG YOUSHAN, SONG JINBAO
• Format: Patent
• Language: Chinese; English
• Published: 17.05.2017
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

The invention relates to the technical field of bulldozers, in particular to an electric-hydraulic cooperative control type speed changing system for a bulldozer. The electric-hydraulic cooperative control type speed changing system for the bulldozer comprises a hydraulic control handle. A button used for controlling a speed gear electromagnetic valve to be powered on or powered off is arranged on the hydraulic control handle, and by powering on or powering off the speed gear electromagnetic valve, pilot oil is made to enter different oil ports of a speed gear control device, a valve element of the speed gear control device moves to the corresponding gear under the effect of oil pressure, and thus speed gear switching is achieved; and a valve element of a direction gear control device is controlled to move to the corresponding position by controlling oil entering the direction gear control device through the hydraulic control handle, and thus direction gear switching is achieved. According to the electric-hyd