IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0136265
(2002-05-01)
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발명자
/ 주소 |
- Lamela, Anthony J.
- Bateman, Troy D.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
6 인용 특허 :
16 |
초록
▼
A skid steer vehicle has a drive system that includes a hydraulic motor coupled to a speed-reduction gearbox. One or more drive shafts extend fore-and-aft from the gearbox and are coupled at each end to two axle housings. Each axle housing includes two reduction gear sets and an axle. Each of the ax
A skid steer vehicle has a drive system that includes a hydraulic motor coupled to a speed-reduction gearbox. One or more drive shafts extend fore-and-aft from the gearbox and are coupled at each end to two axle housings. Each axle housing includes two reduction gear sets and an axle. Each of the axles extends outward from the vehicle and a wheel is fixed to its outer end. A spur gear on a parallel shaft inside the axle housing engages a spur gear on the axle and drives it to provide one gear reduction. A bevel gear in the axle housing engages a bevel gear on the parallel shaft to provide another gear reduction. The vehicle has a drive system located on each side of the vehicle to collectively drive four wheels.
대표청구항
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1. 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; andfirst and second drive systems, disposed adjacent to the first and second sidewalls, respectively, each drive system including:a h
1. 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; andfirst and second drive systems, disposed adjacent to the first and second sidewalls, respectively, each drive system including:a hydraulic motor having 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 housing assembly including a first axle housing coupled to the first end of the driveshaft and a first axle that extends laterally outward away from the first axle housing, the first axle housing assembly housing at least second and third reduction gear sets;a second axle housing assembly including a second axle housing coupled to the second end of the driveshaft and a second axle that extends laterally outward away from the second axle housing, the second axle housing assembly housing at least fourth and fifth reduction gear sets; anda 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, andwherein the first reduction gear set includes a speed-reducing bevel gear set, the third speed-reducing gear set is a bevel gear set, one of the fourth and fifth speed-reducing gear sets is a bevel gear set and another of the fourth and fifth speed-reducing gear sets is a spur gear set, and the first axle housing assembly includes a first internal shaft that is disposed parallel to the first axle and the second reduction gear set includes a first spur gear mounted on the first axle and a second spur gear mounted on the first internal shaft. 2. The vehicle of claim 1, wherein the second axle housing assembly includes a second internal shaft that is disposed parallel to the second axle and further wherein the fourth reduction gear set is the speed-reducing spur gear set and includes a third spur gear mounted on the first axle and a fourth spur gear mounted on the second internal shaft. 3. The vehicle of claim 2, wherein the first axle housing assembly includes a first bevel gear mounted on the first internal shaft and a second bevel gear in mating engagement with the first bevel gear, and further wherein the third speed-reducing gear set comprises the first and second bevel gears. 4. The vehicle of claim 3, wherein the second axle housing assembly includes a third bevel gear mounted on the second internal shaft and a fourth bevel gear in mating engagement with the third bevel gear, and further wherein the fifth speed-reducing gear set comprises the third and fourth bevel gears. 5. The vehicle of claim 4, wherein the first reduction gear set of the gearbox is a bevel gear set. 6. A drive system for a skid steer vehicle, comprising:a hydraulic motor having 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 housing assembly including a first axle housing coupled to the first end of the driveshaft and a first axle that extends laterally outward away from the first axle housing, the first axle housing assembly housing at least second and third reduction gear sets;a second axle housing assembly including a second axle housing coupled to the second end of the driveshaft and a second axle that extends laterally outward away from the seco nd axle housing, the second axle housing assembly housing at least fourth and fifth reduction gear sets; andat least two wheels, driven by one of the first and second axles,wherein the first reduction gear set includes a speed-reducing bevel gear set, the third speed-reducing gear set is a bevel gear set, the fifth speed-reducing gear set is a bevel gear set, the first axle housing assembly includes a first internal shaft that is disposed parallel to the first axle, the second reduction gear set includes a first spur gear mounted on the first axle and a second spur gear mounted on the first internal shaft, the second axle housing assembly includes a second internal shaft that is disposed parallel to the second axle and the fourth reduction gear set includes a third spur gear mounted on the first axle and a fourth spur gear mounted on the second internal shaft. 7. The drive system of claim 6, wherein the first axle housing assembly includes a first bevel gear mounted on the first internal shaft and a second bevel gear in mating engagement with the first bevel gear, and further wherein the third speed-reducing gear set comprises the first and second bevel gears. 8. The drive system of claim 7, wherein the second axle housing assembly includes a third bevel gear mounted on the second internal shaft and a fourth bevel gear in mating engagement with the third bevel gear, and further wherein the fifth speed-reducing gear set comprises the third and fourth bevel gears. 9. The drive system of claim 8, wherein the driveshaft is a single elongate member extending through the gearbox and engaging both the first axle housing assembly and the second axle housing assembly. 10. The drive system of claim 8, wherein the driveshaft drivingly engages both the second and fourth bevel gears. 11. A skid steer vehicle, comprising:a chassis having a right side, a left side, a front and a back;an engine mounted to the chassis and including at least first and second hydraulic pumps; anda right hydraulic motor driven by the first hydraulic pump;a right gearbox including a gear set driven by the right hydraulic motor;a right driveshaft having an axis of rotation, the right driveshaft extending from the right gearbox and having a front end disposed forward of the gearbox and a rear end disposed rearward of the gearbox;a right-front axle assembly including a right-front axle housing drivingly coupled to the front end of the right driveshaft and a right-front axle that extends laterally outward away from the right-front axle housing, which houses at least one gear set;a right-rear axle assembly including a right-rear axle housing drivingly coupled to the rear end of the right driveshaft and a right-rear axle that extends laterally outward away from the right-rear axle housing, which houses at least one gear set;a right-front wheel driven by the right-front axle;a right-rear wheel driven by the right-rear axle;a left hydraulic motor driven by the second hydraulic pump;a left gearbox including a gear set driven by the left hydraulic motor;a left driveshaft having an axis of rotation, the left driveshaft extending from the left gearbox and having a front end disposed forward of the gearbox and a rear end disposed rearward of the gearbox;a left-front axle assembly including a left-front axle housing drivingly coupled to the front end of the left driveshaft and a left-front axle that extends laterally outward away from the left-front axle housing, which houses at least one gear set;a left-rear axle assembly including a left-rear axle housing drivingly coupled to the rear end of the left driveshaft and a left-rear axle that extends laterally outward away from the left-rear axle housing, which houses at least one gear set;a left-front wheel driven by the left-front axle; anda left-rear wheel driven by the left-rear axle,wherein the left hydraulic motor drives the left-front and left-rear wheels through at least the left gearbox and the left driveshaft and the righ t hydraulic motor drives the right-front and right-rear wheels through at least the right gearbox and the right driveshaft.
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