HYDRAULIC SERVO DEVICE

Title:

HYDRAULIC SERVO DEVICE

Document Type and Number:

Japanese Patent JPS5989806

Kind Code:

A

Abstract:

PURPOSE:To heighten responsibility and reliability by providing a rotary joint, a sleeve and a piston with oil paths for connecting an oil discharge pipe, a spool chamber and a cylinder chamber one another. CONSTITUTION:When a force motor 1 is driven by a command current, a spool 4 is moved against springs 6a, 6b relatively to a rotating sleeve 5 as indicated by an arrow A, and oil paths 15a, 16a connected to an oil feed pipe 13 communicate with a spool chamber 7a, so that pressurized oil flows into a left cylinder chamber 11 through an oil path 17 of the sleeve 5. Simultaneously, the pressurized oil in the right cylinder chamber 12 is discharged from an oil discharge pipe 14b through an oil path 18, the spool chamber 7b and oil paths 16c, 15c, which causes a piston 9 to move to the right, thereby moving to the right the sleeve integral with the piston 9. That is, the sleeve 5 is adapted to move with the movement of the spool 4 by 1 to 1. In this arrangement, the responsibility and reliability can be improved in a simple structure.

Inventors:

ICHIYANAGI TAKESHI
WATANABE HARUO
TAKADA AKIRA

Application Number:

JP19748382A

Publication Date:

May 24, 1984

Filing Date:

November 12, 1982

Export Citation:

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