| 摘要 |
PROBLEM TO BE SOLVED: To prevent a temperature rise of a coil in a solenoid valve.SOLUTION: A solenoid valve 100 comprises: a valve body 1 having valve passages 1A, 1B in which hydraulic oil flows; a spool 2 switching open and close of the valve passages 1A, 1B; a coil part 20 generating magnetic force when electric current flows through the same; a yoke 11 covering the coil part 20; a stator core 12 provided inside the coil part 20 and excited by the magnetic force of the coil part 20; a shaft 16 movable in the axial direction along with the spool 2; a plunger 17 fixed to the shaft 16 and moved in the axial direction by attraction force acting between the plunger and the stator core 12; a fluid passage 30 provided outside of the coil part 20, through which hydraulic oil passes; an introduction passage 32 communicating with the fluid passage 30 and introducing hydraulic oil in the valve body 1 to the fluid passage 30; and a discharge passage 33 communicating with the fluid passage 30 and discharging the hydraulic oil passed through the fluid passage 30 to the outside of the yoke 11.SELECTED DRAWING: Figure 1 |
