| 摘要 |
A solenoid valve includes: a valve body having a fitting hole; a tubular sleeve fitted in a fitting hole and having a valve hole, a supply port, and an output port; and a spool valve that is accommodated in the valve hole of the sleeve and that changes a flow passage area between the supply port and the output port by moving axially. A pair of recessed portions is formed in an outer peripheral face of the sleeve, at positions on axially opposite sides of the supply port, so as to extend in the circumferential direction of the sleeve. A strip-shaped first strainer is fitted in the recessed portions. A cutout into which a pressure for suppressing an offset of the central axis of the sleeve from the central axis of the fitting hole, is formed in the sleeve so as to be communicated with the supply port. |
| 主权项 |
1. A solenoid valve for use with a controlled portion, the solenoid valve comprising:
a valve body including:
a fitting hole,a supply passage configured to supply hydraulic fluid, andan output passage configured to introduce the hydraulic fluid to the controlled portion; a tubular sleeve fitted in the fitting hole of the valve body, the tubular sleeve including:
a valve hole,a supply port communicating with the supply passage,an output port communicating with the output passage,a pair of recessed portions formed in an outer peripheral face of the tubular sleeve, the pair of recessed portions being formed at positions on axially opposite sides of the supply port so as to extend in a circumferential direction of the tubular sleeve,a strip-shaped filter member fitted in the pair of recessed portions,a pressure introduction portion formed in the tubular sleeve and being configured to communicate with the supply port, the pressure introduction portion having a pressure suppressing an offset of a central axis of the tubular sleeve from a central axis of the fitting hole, anda communication hole formed in the tubular sleeve and being configured to communicate between the supply port and the pressure introduction portion, the communication hole having an opening at a position between circumferentially opposite ends of the filter member; a spool valve accommodated in the valve hole of the tubular sleeve so as to be axially movable, the spool valve being configured to change a flow passage area between the supply port and the output port by moving axially; and a solenoid portion configured to axially move the spool valve, wherein
the pressure introduction portion is a cutout formed so as to extend from an opening of the communication hole along an axial direction of the tubular sleeve. |
