DRIVING DEVICE FOR PLURAL HYDRAULIC MOTOR

Japanese Patent JP3786390

B2

PROBLEM TO BE SOLVED: To provide a driving device of a plurality of hydraulic motors in which a high torque and high revolution driving can be performed by means of a hydraulic pump having a small volume and an efficiency is good.
SOLUTION: A first hydraulic motor 10 is driven by a hydraulic pump 2, a second hydraulic motor 20 is connected in parallel to the hydraulic pump 2 through an electromagnetic direction control valve 7 and connected to a case drain circuit 8 of the first hydraulic motor 10. The first hydraulic motor 10 drives an output shaft 30 and the second hydraulic motor 20 is connected to the output shaft 30 through a first clutch 23 and a second clutch 25. When a revolution number of the output shaft 30 is not more than a predetermined value, the output shaft 30 is driven by the first hydraulic motor 10 and the second hydraulic motor 20 to provide a high torque. When the revolution number of the output shaft 30 exceeds the predetermined value, the electromagnetic direction control valve 7 is switched to drive the second hydraulic motor 20 by means of the output shaft 30 and an oil in the casing of the first hydraulic motor 10 is sucked to reduce a stirring resistance.

JP2007024226	TRANSMISSION
JP5373520	Riding type agricultural work machine
JPH0611440	[Name of invention] Axle drive device

Sadao Futani
Morita Hayashi
Toshiyuki Akasaka

JP5420198A

June 14, 2006

February 20, 1998

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KOMATSU LTD.

F16H47/02; F16H61/452; (IPC1-7): F16H47/02; F16H61/44

JP43012379B1
JP2240442A
JP59003053U
JP49013564A
JP53048181A
JP3033562A
JP4262159A
JP5043315Y2
JP5944537B2

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