Axle driving apparatus with cooling tubing
AssigneeKanzaki Kokyukoki Mfg. Co., Ltd.
InventorsMasaru Iida, Kenichi Takada
Life of this patent
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Abstract
An axle driving apparatus of the present invention consists of a hydrostatic transmission for driving a vehicle. The transmission is so designed that a fan is disposed on a power input shaft so as to cool a housing as well as cooling tubing or an oil passage disposed between the fan and the upper surface of the housing. The housing of the axle driving apparatus is filled with lubricating oil, used on the gears and bearings of the power transmission from the hydrostatic transmission to the axles, and operating oil, used in the pump and motor of the hydrostatic transmission. The oil circulates within the tubing or the oil passage. Cooling the oil passing in the tubing or the oil passage prevents a deterioration in efficiency of the axle driving apparatus.
Claims38
An axle driving apparatus, comprising:
- a housing;
- an axle disposed in said housing;
- a hydrostatic transmission disposed in said housing, including a hydraulic pump driven by a power input shaft and a hydraulic motor for inputting power from a prime mover to drive said axle;
- oil disposed in said housing for operating said hydrostatic transmission and for lubricating said axle;
- an input pulley provided on said power input shaft;
- a fan provided on said power input shaft adjacent to said input pulley;
- and
- cooling tubing disposed between said housing and said fan for said oil, wherein said oil in said housing is adapted to flow into said cooling tubing and to be cooled by said fan.
An axle driving apparatus, comprising:
- a housing;
- an axle disposed in said housing;
- a hydrostatic transmission disposed in said housing, including a hydraulic pump driven by a power input shaft having a longitudinal axis and a hydraulic motor with a motor shaft having a longitudinal axis for inputting power from a prime mover to drive said axle, wherein said power input shaft drives said hydraulic pump and the longitudinal axis of said power input shaft is perpendicular to the longitudinal axis of said motor shaft;
- oil disposed in said housing for operating said hydrostatic transmission and for lubricating said axle;
- a fan mounted on said power input shaft of said hydraulic pump;
- and
- cooling tubing disposed between said fan and said housing for said oil, wherein said oil in said housing is adapted to flow into said cooling tubing and to be cooled by said fan.
An axle driving apparatus, comprising:
- a housing;
- an axle disposed in said housing;
- a hydrostatic transmission disposed in said housing, including a hydraulic pump driven by a power input shaft and a hydraulic motor, for inputting power from a prime mover to drive said axle;
- oil disposed in said housing for operating said hydrostatic transmission and for lubricating said axle;
- a fan mounted on said power input shaft;
- and
- an oil passage formed in said housing for cooling said oil;
- wherein said fan cools said oil disposed in said oil passage.
An axle driving apparatus, comprising:
- a housing;
- an axle disposed in said housing;
- a hydrostatic transmission disposed in said housing, including a hydraulic pump driven by a power input shaft having a longitudinal axis and a hydraulic motor with a motor shaft having a longitudinal axis, for inputting power from a prime mover to drive said axle, wherein said power input shaft drives said hydraulic pump and the longitudinal axis of said power input shaft is perpendicular to the longitudinal axis of said motor shaft;
- oil disposed in said housing for operating said hydrostatic transmission and for lubricating said axle;
- a fan mounted on said power input shaft;
- and
- an oil passage disposed between said fan and said housing for cooling said oil;
- wherein said oil in said housing is adapted to flow into said oil passage and to be cooled by said fan.
An axle driving apparatus, comprising:
- a housing;
- oil disposed in said housing;
- an axle disposed in said housing;
- a hydrostatic transmission disposed in said housing, including a hydraulic pump driven by a power input shaft and a hydraulic motor for inputting power from a prime mover to drive said axle;
- a fan mounted on said power input shaft;
- a cover disposed between said fan and said housing and fixed on said housing;
- and
- an oil passage disposed in said cover for cooling said oil, wherein said oil in said housing is adapted to flow into said passage.
Dependencies are inferred from the claim text.