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Patent Searching and Data


Title:
HYDRAULIC TRANSMISSION DEVICE
Document Type and Number:
Japanese Patent JPS63214555
Kind Code:
A
Abstract:

PURPOSE: To aim at enhancing the durability of a hydraulic motor by providing a relief valve which opens when the hydraulic pressure of a replenishing oil passage exceeds a set pressure, and by connecting an oil passage to the relief valve, for leading oil into a lubrication chamber in a hydraulic motor when the relief valve is opened.

CONSTITUTION: A vehicle hydraulic continuously variable transmission CVT transmits the power of engine F through an input shaft 2 so as to drive a fixed displacement hydraulic pump P and a replenishing pump F, and therefore, wheels W are driven in a stepless manner through a hydraulic closed circuit C, a hydraulic motor M, front and rear gear units G and a differential gear D. Further, discharged oil from the replenishing pump F is fed into the hydraulic closed circuit through an oil passage 137 so as to replenish for lost amount, but when the pressure of the passage 137 increases exceeding a predetermined value, a relief valve 50 is opened so that relieved oil whose pressure is regulated by a pressure control valve 150 is sufficiently fed into a lubrication chamber 75 in the hydraulic motor M so as to ensure lubrication for shoes and a swash plate. Thus, it is possible to enhance the durability of a hydraulic motor.


Inventors:
OKUDA AKIHITO
Application Number:
JP1987000044431
Publication Date:
September 07, 1988
Filing Date:
February 27, 1987
Export Citation:
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Assignee:
HONDA MOTOR CO LTD
International Classes:
F16H39/14; F16H61/40; F16H61/4139; F16H61/4165; (IPC1-7): F16H39/14; F16H39/44
Domestic Patent References:
JP45039569A