Patent ID: 7121093

Claim:
An axle driving apparatus comprising: a pair of housings; a hydraulic pump and a hydraulic motor disposed in each of the housings, wherein the hydraulic pump has a vertical input shaft; a single axle disposed in each of the housings and projecting outward from only one side of the housing, the axle being driven by a motor output shaft of the hydraulic motor; a coupling mechanism fixed to both of the housings so as to connect the housings to each other, wherein the housings connected to each other through the coupling mechanism are arranged side by side, and wherein the axles are arranged coaxially and project outward from the respective housings opposite to each other, wherein each of the housings is extended perpendicular to the axle, and wherein the hydraulic pump and the hydraulic motor are aligned in the extended direction of their respective housing so that the hydraulic motor is nearer to the axle than the hydraulic pump is to the axle.