Skid steer vehicle with direct drive
AssigneeCase Corporation
InventorsTroy D. Bateman, Anthony J. Lamela
Life of this patent
Estimating the term…
Abstract
A skid steer vehicle has a drive system that includes hydraulic motor coupled to a reduction gearbox. A driveshaft extends fore-and-aft from the gearbox and is coupled at each end to a combined housing including a reduction gear set and an axle. The axle extends laterally outward from the vehicle and a wheel is fixed to its outer end. There are two housings on either end of the driveshaft. There are two such drive systems on the vehicle, one on either side. Thus the vehicle has two separate drive systems, each capable of independently driving two wheels on opposing sides of the vehicle.
Claims14
A skid steer vehicle, comprising:
- a chassis having first and second sidewalls;
- an engine mounted to the chassis and having at least first and second hydraulic pumps;
- and
- first and second drive systems, disposed adjacent to the first and second sidewalls, respectively, each drive system including:
- a hydraulic motor including an output shaft with an axis of rotation;
- a gearbox coupled to the hydraulic motor and including a first reduction gear set driven by the hydraulic motor;
- a driveshaft having an axis of rotation, the driveshaft extending from the gearbox and having a first end disposed forward of the gearbox and a second end disposed rearward of the gearbox;
- a first axle assembly including a first axle housing coupled to the first end of the driveshaft, a second reduction gear set and a first axle that extends laterally outward away from the first axle housing, wherein the first axle housing houses at least the second reduction gear set;
- a second axle assembly including a second axle housing coupled to the second end of the driveshaft, a third reduction gear set and a second axle that extends laterally outward away from the second axle housing, wherein the second axle housing houses at least the third reduction gear set;
- and
- a wheel driven by one of the first and second axles;
- wherein the hydraulic motor of the first drive system is fluidly coupled to the first hydraulic pump to be driven thereby and further wherein the hydraulic motor of the second drive system is fluidly coupled to the second hydraulic pump to be driven thereby, and
- wherein the first reduction gear set includes a speed-reducing planetary gear set and a speed-reducing spur gear set.
A drive system for a work vehicle, comprising:
- a hydraulic motor including an output shaft with an axis of rotation;
- a gearbox coupled to the hydraulic motor and including a first reduction gear set driven by the hydraulic motor;
- a driveshaft having an axis of rotation, the driveshaft extending from the gearbox and having a first end disposed forward of the gearbox and a second end disposed rearward of the gearbox;
- a first axle assembly including a first axle housing coupled to the first end of the driveshaft, a second reduction gear set and a first axle that extends laterally outward away from the first axle housing, wherein the first axle housing houses at least the second reduction gear set;
- a second axle assembly including a second axle housing coupled to the second end of the driveshaft, a third reduction gear set and a second axle that extends laterally outward away from the second axle housing, wherein the second axle housing houses at least the third reduction gear set;
- and
- a wheel driven by one of the first and second axles,
- wherein the first reduction gear set includes a speed-reducing planetary gear set and a speed-reducing spur gear set.
Dependencies are inferred from the claim text.