Title:
CONTROL VALVE UNIT AND WORKING VEHICLE
Document Type and Number:
Japanese Patent JP2023083781
Kind Code:
A
Abstract:
To enable the elimination of operation against a will with a control valve, even if a part of a body of a worker erroneously contacts with an operation tool and the like.SOLUTION: A control valve unit is equipped with manual operation valves 15 and 16 that supply a working fluid of a working fluid channel to a hydraulic actuator, a pilot operation valve that is operated by the pilot pressure of a pilot channel 23 and controls the supplying/discharging of the working fluid of the working fluid channel, and a lock member 31 that engages to an engaging portion Sa of a spool S of the manual operation valves 15 and 16 by the energizing force of an energizing member 32. A lock releasing channel 35 is provided, which moves the lock member 31 to a non-engaging position by the pilot pressure of the pilot channel 23. The lock member 31 engages with the engaging portion Sa to prevent the operation of the spool S when the manual operation valves 15 and 16 are at a non-operating position and the pressure of the lock releasing channel 35 is released.SELECTED DRAWING: Figure 3
Inventors:
IMAMURA TAKUYA
NISHIKAWA MASAAKI
NISHIKAWA MASAAKI
Application Number:
JP2021197673A
Publication Date:
June 16, 2023
Filing Date:
December 06, 2021
Export Citation:
Assignee:
KUBOTA KK
International Classes:
F16K35/00; E02F3/43; E02F9/22; F15B15/26
Attorney, Agent or Firm:
Patent Attorney Corporation R&C