Four-gear power reversing valve for loader

• Main Authors: ZHONG YONG, JIA LINGLING, REN JINGYU, CHEN GEN, TAO CHANGYONG
• Format: Patent
• Language: Chinese; English
• Published: 16.05.2023
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DEVICES FOR VENTING OR AERATING; DREDGING; ENGINEERING ELEMENTS AND UNITS; FIXED CONSTRUCTIONS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; FOUNDATIONS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULIC ENGINEERING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SOIL SHIFTING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The invention discloses a four-gear power reversing valve for a loading machine. The four-gear power reversing valve comprises an upper valve body, a lower valve body, a diverter valve, a reversing valve, a gear shifting valve, a first balance valve, a second balance valve, a first buffer valve and a second buffer valve, wherein the diverter valve, the reversing valve and the gear shifting valve are arranged in the upper valve body, and the first balance valve, the second balance valve, the first buffer valve and the second buffer valve are arranged in the lower valve body. A first oil port of the first buffer valve is connected to the forward gear working oil way in parallel, and a second oil port of the first buffer valve is connected with a back pressure oil port of the first balance valve through a first buffer oil way; the first oil port of the second buffer valve is connected to the reverse gear working oil way in parallel, and the second oil port of the second buffer valve is connected with the back pr