US 5,317,936 AGranted

Power transmission structure of a working car

AssigneeKanzaki Kokyukoki Mfg. Co., Ltd.

InventorsKenji Shiba, Hideaki Okada

Life of this patent

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Abstract

A power transmission structure for a working car provided at the center thereof with a working machine, such as a mower. Power is transmitted by the simplest mechanism from a vertical engine to axles and the working machine. Two output pulleys are attached to a vertical rotary output shaft of the vertical engine. One pulley drives a pump shaft of an axle driving unit and the other pulley drives an input pulley of the working machine. A hydraulic power transmission and a differential gear are laterally eccentrically disposed within the axle driving unit. The hydraulic transmission comprises a hydraulic pump and a hydraulic motor. Power is transmitted from the rotary output shaft of the vertical engine to a vertical pump shaft of the hydraulic pump. A motor shaft of the hydraulic motor is operatively connected to the differential gear.

Claims25

Dependent claims

A power transmission for a vehicle, comprising:

an axle casing;
an axle disposed within said axle casing;
an engine having a vertical output shaft, said vertical output shaft disposed perpendicular to a central longitudinal axis of said vehicle;
a hydraulic transmission disposed within said axle casing and operatively connected to said axle through a differential gear, said hydraulic transmission including a pump shaft parallel to said vertical output shaft, said differential gear disposed on one side of said axis and said pump shaft disposed on a side of said axis opposite said one side;
first and second output pulleys drivingly connected to said vertical output shaft;
a transmission input pulley drivingly connected to said pump shaft;
a belt drivingly engaged with said first output pulley and said transmission input pulley so that said first output pulley drives said transmission input pulley;
a driven apparatus attached to said vehicle;
a driven apparatus input pulley drivingly connected to said driven apparatus;
a belt drivingly engaged with said second output pulley and said driven apparatus input pulley so that said second output pulley drives said driven apparatus input pulley;
wherein said axle casing includes a portion for housing said differential gear which extends from a portion for housing said axle;
and
wherein said first and second output pulleys are disposed to one side and above said portion for housing said differential gear.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/946,579Filed 18 Sep 1992
Priority: JP 3-23983519 Sep 1991
Granted: 7 Jun 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B60K 17/105
Of fluid gearing: units comprising at least a part of the gearing and a torque-transmitting axle, e.g. transaxles
B60K 17/165
Of differential gearing: provided between independent half axles
B60T 1/005
Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles: by locking of wheel or transmission rotation
B60Y 2200/223
Agricultural vehicles: ridable lawn mowers