Title:
HYDRAULIC DRIVE DEVICE
Document Type and Number:
Japanese Patent JP3507142
Kind Code:
B2
Abstract:
PURPOSE: To form a device in a compact manner and to perform simple setting of the pressure of a relief valve from the outside by arranging a check valve and a relief valve in series to a valve case, in a closing circuit to interconnect a hydraulic pump and a hydraulic motor.
CONSTITUTION: In a hydraulic drive device, a circuit 5a on one side and a circuit 5b on the other side, through which a pair of kidney ports are intercommunicated, are formed in a center section 5, and the circuit 5a on one side and the circuit 5b on the other side are connected to a hydraulic pump P and a hydraulic motor M, respectively, to form a closed circuit. The circuit 5a on one side and the circuit 5b on the other side are communicated to the delivery side of a charge pump 11 through valve devices V and V relief valves 36 are formed integrally with respective check valves 33. In this case, the relief valves 36 are arranged in series in a valve case 32, containing the check valves 33, in such a state that the valve body of the relief valve is positioned facing the valve body of the check valve 33. The base part of a relief spring 37 is supported by a cover member 39 mounted on the valve case 32.
Inventors:
Shinya Sakakura
Ryota Ohashi
Kuntoku Sakikawa
Ryota Ohashi
Kuntoku Sakikawa
Application Number:
JP21861194A
Publication Date:
March 15, 2004
Filing Date:
September 13, 1994
Export Citation:
Assignee:
Kanzaki Kokyukoki Mfg. Co., Ltd.
International Classes:
F16H39/06; F16H61/40; F16H61/4017; F16H61/4026; F16H61/4139; F16H61/4043; (IPC1-7): F16H61/40
Domestic Patent References:
| JP6018677A | ||||
| JP425062U | ||||
| JP586067U | ||||
| JP3100659U | ||||
| JP2136851U |
Attorney, Agent or Firm:
Juichiro Yano