Title:
HYDRAULIC WINCH DEVICE
Document Type and Number:
Japanese Patent JP2713696
Kind Code:
B2
Abstract:
PURPOSE: To enable a device to perform both ordinary up/down winding operation and fine speed down winding operation without enlarging a size of the hydraulic which device
CONSTITUTION: A charge oil path 25 is connected to an up widing side port 17a of an oil hydraulic motor 17, so that delivery oil of a charge pump 26 can be drawn out through a pilot operating check valve 27, also to previde an oil pressure/temperature detector 31. A loading load is detected by a load detector 33 to calculate a holding pressure in the up winding side port 17a, and a dellivery amount of the charge pump 26 is determined. In accordance wiht a leak of the oil hydraulic motor 17, holding oil of the up winding side port 17a is made to reversely flow by the pilot operating check value 27, to adjust a rotational speed of the oil hydraulic motor 17. Based on flucturating a load detected by the load detected 33 and based on changing an oil temperature detected by the oil pressure/temperature detetctor 31, a leak mount of the oil hydraulic motor 17 is estimated to perform feed forward control, so as to stably control a fine speed down winding speed of a which.
Inventors:
Kazuaki Inoue
Application Number:
JP2712295A
Publication Date:
February 16, 1998
Filing Date:
February 15, 1995
Export Citation:
Assignee:
Sumitomo Construction Machinery Co., Ltd.
International Classes:
B66D1/44; B66D1/08; (IPC1-7): B66D1/44
Domestic Patent References:
| JP5201697A |
Attorney, Agent or Firm:
Takayoshi Hayashi
Previous Patent: HANDLE SETTING SEAT FOR DOOR
Next Patent: FIXING DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE
Next Patent: FIXING DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE