JPH0218905U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view of the main parts of the embodiment of the present invention, Fig. 2 A to C are explanatory diagrams of operation, Fig. 3 is an explanatory diagram of the stroke of the proportional solenoid, and Fig. 4 is a diagram of the attraction force characteristics of the proportional solenoid. be. DESCRIPTION OF SYMBOLS 11... Valve part, 12... Drive part, 15... Valve body, 17... Spool, 22... Centering bush, 22a... Locking part, 23... Return spring,
24...Feedback chamber, 30...Proportional solenoid.

Amendment August 29, 1981 The name of the invention is amended as follows. Title of the invention: 5-port electro-pneumatic proportional valve The scope of the utility model registration claims and the brief description of the drawings are amended as follows. [Claims for Utility Model Registration] A spool driven by a proportional solenoid is provided within the valve body having a supply port, a pair of output ports, and a pair of discharge ports, and within the stroke range of the spool, the above-mentioned A proportional valve function part that proportionally controls the output pressure to one output port by balancing the driving force of the proportional solenoid and the feedback force acting on the spool, and a switching valve function part that switches the other output port to the supply port. In the 5-port electro-pneumatic proportional valve, the stroke range of the proportional solenoid, which provides a substantially constant suction force proportional to the amount of energization regardless of the stroke, is assigned to drive the spool in the proportional valve function part, A 5-port electro-pneumatic proportional valve characterized in that a stroke range including a range in which the suction force corresponding to a constant amount of energization fluctuates depending on the stroke is assigned to drive a spool in a switching valve function part. [Brief Description of the Drawings] Fig. 1 is a longitudinal sectional front view of the main parts of the embodiment of the present invention, Fig. 2 A to C are explanatory diagrams of operation, Fig. 3 is an explanatory diagram of the stroke of the proportional solenoid, and Fig. 4 is a proportional solenoid diagram. FIG. 3 is a diagram showing the attraction force characteristics of a solenoid. P... Supply port, A, B... Output port, E
A, EB...Exhaust port, 11...Valve part, 12...
... Drive unit, 15 ... Valve body, 17 ... Spool,
30...Proportional solenoid.

Claims (1)

[Claims for Utility Model Registration] A valve portion, a drive portion that applies a driving force to a valve member in the valve portion, the valve portion comprising a supply port, first and second output ports on both sides thereof, and A valve body having first and second discharge ports on both sides, and a flow path between a supply port and one of the output ports and the other of the output ports by displacement toward the drive side and the return side about the neutral position. and a return spring that applies a return force to the valve member; and a feedback member that communicates with the first output port and applies a return force of feedback fluid to the valve member. and a displaceable centering bush having a locking portion that locks onto the valve body and cuts off the return force of the return spring against the valve member on the return side from the neutral position, A 5-port electro-pneumatic proportional valve comprising a proportional solenoid whose suction force is proportional to the amount of current applied to the solenoid.