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Title:
MOTOR CAPACITY CONTROLLER FOR HYDRAULIC OIL CIRCUIT
Document Type and Number:
Japanese Patent JP2000120605
Kind Code:
A
Abstract:

To provide a capacitor controller for hydraulic oil circuit of variable capacity motor, by which operability for changing the cut-off pressure can be enhanced and remote control can be exercised.

In a controller, a balance point of a spool by the set-force of a return spring of a control switching valve 10 is set so that it corresponds to the inlet-side load pressure of a variable capacity motor 1 while the motor 1 is operated at a high speed and under a heavy load, and an inlet-side load pressure detector 24 for the motor 1 is installed in a hydraulic oil circuit 2, and when an ON signal is inputted from a remote control switch 38, the detection value by the pressure detector 24 is compared with the set-value corresponding to the inlet-side load pressure of the motor 1 during its operation at a high speed and under a heavy load, so that the controller makes a regulator 8 switch the motor capacity from a small capacity to a large one when the detection value reaches the set-value. When an OFF signal is inputted by the remote control switch 38, the controller 26 forbids the regulator 8 to perform the operation according to the detection value of the pressure detector 24.


Inventors:
IKEZAKI OSAMU
Application Number:
JP28986798A
Publication Date:
April 25, 2000
Filing Date:
October 12, 1998
Export Citation:
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Assignee:
SUMITOMO CONSTR MACH
International Classes:
F15B11/02; (IPC1-7): F15B11/02
Attorney, Agent or Firm:
Takayoshi Hayashi