PILOT PRESSURE PATTERN SWITCHING VALVE FOR HYDRAULIC SHOVEL

摘要

PROBLEM TO BE SOLVED: To provide a pilot pressure pattern switching valve for a hydraulic shovel, which dispenses with a pipe for connecting between the pilot pressure pattern switching valve and direction switching valves, and piping work.;SOLUTION: The pilot pressure pattern switching valve 1 for the hydraulic shovel functions to change connecting patterns between pilot chambers (106a to 109b) of the direction switching valves (106 to 109) for controlling actuators (102 to 105) of the hydraulic shovel, respectively, and remote control valves (LF to RL). The pattern switching valve 1 consists of a main body 2 having inlet ports 6 connected to the remote control valves (LF to RL), respectively, and outlet ports 7 connected to the pilot chambers (106a to 109b) of the direction switching valves (106 to 109), respectively, and fixing means 4 for fixing the main body to the direction switching valves (106 to 109). In the pattern switching valve 1, each outlet port 7 is formed on a contact surface 5 of the main body 1, which makes contact with each direction switching valve, at a location that faces an opening of the direction switching valve communicating with each pilot chamber (106a to 109b).;COPYRIGHT: (C)2004,JPO