Title:
AUTOMATIC OPERATION CONTROL METHOD FOR VARIABLE STROKE VOLUME PISTON TYPE HYDRAULIC MOTOR
Document Type and Number:
Japanese Patent JPS5958203
Kind Code:
A
Abstract:
PURPOSE:To automatically control the number of rotations and torque of a motor by connecting a valve switched corresponding to the amount of driving pressurized oil to an eccentric piston for varying the eccentricity of a motor to change the eccentricity of the motor corresponding to the amount of driving pressurized oil. CONSTITUTION:A long eccentricity retaining piston 403 and a short eccentricity retaining piston 404 are mounted in the interior of a motor. Pipelines 314, 314' communicating with each piston chambers are connected to a main spool valve 302 in such a manner as to be switched, and the pilot chamber of the main spool valve 302 is connected to an auxiliary spool valve 202 which is switched corresponding to the amount of driving pressure. In this arrangement, when the driving pressurized oil increases, the auxiliary spool valve 202 is switched, and in response to such switching, the main spool valve 302 is switched to control the long and short eccentricity retaining pistons 403, 404 and reduce the eccentricity of the motor, whereby the number of rotations and torque of the motor can be automatically controlled corresponding to the amount of driving pressurized oil.
Inventors:
KOBAYASHI FUMIO
Application Number:
JP17047982A
Publication Date:
April 03, 1984
Filing Date:
September 28, 1982
Export Citation:
Assignee:
YANASE KK
International Classes:
F03C1/04; B66D1/08; B66D1/44; F03C1/053; F03C1/26; F15B11/02; (IPC1-7): B66D1/08; F03C1/04; F15B11/02
Attorney, Agent or Firm:
Ainosuke Hanasaki