JPH0266704U

JPH0266704U -

Info

Publication number: JPH0266704U
Application number: JP15721288U
Authority: JP
Priority date: 1988-11-02
Filing date: 1988-11-02
Publication date: 1990-05-21

Description

[Brief explanation of drawings]

第１図〜第５図は本考案の実施例を示し、第１
図は第４図の―線断面図、第２図は第１図の
―線断面図、第３図は一部破断正面図、第４
図は平面図、第５図は側面図、第６図は従来例の
断面説明図、第７図Ａ，Ｂはスプールの中立位置
の説明図、第８図は圧電アクチユエータの印加電
圧とストロークの関係を示す図表である。１０は弁本体、１１は弁孔、１２はスリーブ、
１３は軸孔、２３はスプール、３０は透孔、３５
は偏心シヤフト、３７は偏心突部、３８は切欠溝
。 1 to 5 show embodiments of the present invention.
The figure is a sectional view taken along the line - of Fig. 4, Fig. 2 is a sectional view taken along the line - - of Fig. 1, Fig. 3 is a partially cutaway front view, and Fig. 4 is a sectional view taken along the line -
The figure is a plan view, Figure 5 is a side view, Figure 6 is a sectional explanatory diagram of the conventional example, Figures 7A and B are explanatory diagrams of the neutral position of the spool, and Figure 8 is an illustration of the applied voltage and stroke of the piezoelectric actuator. This is a diagram showing the relationship. 10 is a valve body, 11 is a valve hole, 12 is a sleeve,
13 is a shaft hole, 23 is a spool, 30 is a through hole, 35
37 is an eccentric shaft, 37 is an eccentric protrusion, and 38 is a notched groove.

Claims

[Scope of utility model registration request]

A sleeve 12 having an inlet port and an outlet port is fitted into the valve hole 11 of the valve body 10, and a spool 23 is slidably inserted into the shaft hole 13 of the sleeve 12. The piezoelectric actuator moves the spool 23 to a position where the inlet port and the outlet port are communicated or disconnected, and the through hole 30 is inserted into the valve body 10 into the valve hole 11.
An eccentric shaft 35 is formed so as to open at the through hole 30 and has an eccentric protrusion 37 inside the through hole 30.
The eccentric protrusion 37 is rotatably fitted tightly into a notched groove 38 formed on the outer peripheral surface of the sleeve 12, and a lock nut 39 is further provided to lock the rotation of the eccentric shaft 35. Neutral position adjustment device for piezoelectrically driven servo valves.