IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0751321
(2013-01-28)
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등록번호 |
US-8793990
(2014-08-05)
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발명자
/ 주소 |
- Hauser, Raymond
- Buescher, Ryan S.
- Keller, Scott W.
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출원인 / 주소 |
- Hydro-Gear Limited Partnership
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대리인 / 주소 |
Neal, Gerber & Eisenberg LLP
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인용정보 |
피인용 횟수 :
0 인용 특허 :
39 |
초록
▼
A drive apparatus having a motor running surface formed on a first side of a center section and a thrust spacer mounted on the center section opposite the motor running surface. A motor cylinder block is rotatably disposed on the running surface and drives a motor shaft. A gear train including an ou
A drive apparatus having a motor running surface formed on a first side of a center section and a thrust spacer mounted on the center section opposite the motor running surface. A motor cylinder block is rotatably disposed on the running surface and drives a motor shaft. A gear train including an output gear fixed on the motor shaft translates motion to the output axles. The drive mechanism may also include a brake having a stationary pin adjacent to a first face of a gear, a brake stator positioned on a second face of the gear opposite the first face and capable of bearing against the gear, a brake rotor having an inner gear form that engages the teeth of a second gear; and a brake puck capable of bearing against the brake rotor.
대표청구항
▼
1. A drive apparatus, comprising: a housing forming a sump;a center section disposed in the sump and comprising a first running surface for a motor cylinder block disposed on a first side thereof; a second running surface for a pump cylinder block disposed on a second side thereof, and a thrust spac
1. A drive apparatus, comprising: a housing forming a sump;a center section disposed in the sump and comprising a first running surface for a motor cylinder block disposed on a first side thereof; a second running surface for a pump cylinder block disposed on a second side thereof, and a thrust spacer having a first portion disposed on a third side of the center section opposite the first side and a second portion extending away from the center section;a motor shaft disposed in the sump and driven by the motor cylinder block;a gear train disposed in the housing and driven by the motor shaft, the gear train comprising a plurality of drive gears and an output gear fixed on the motor shaft, wherein the second portion of the thrust spacer forms a space in which the output gear is disposed to prevent contact between at least one of the plurality of drive gears and the output gear; anda first axle shaft having a first end extending from the housing and a second end engaged to and driven by the gear train. 2. The drive apparatus of claim 1, wherein the second portion of the thrust spacer comprises arms disposed about a portion of the circumference of the output gear. 3. The drive apparatus of claim 1, wherein the thrust spacer is comprised of a spacer cup, and the second portion is a circular cup wall, the spacer cup being mounted to the center section, wherein the output gear is located in an internal volume of the spacer cup and openings are formed in the circular cup wall to permit oil flow from the sump into and out from the internal volume of the spacer cup and to provide an area for the output gear to engage another one of the plurality of drive gears. 4. The drive apparatus of claim 3, wherein the spacer cup further comprises a first flange and a second flange, the first flange being shaped to fit within pockets formed on the center section to prevent rotation of the spacer cup with respect to the center section and the second flange abutting against a washer adjacent to one of the plurality of drive gears. 5. The drive apparatus of claim 1, further comprising a second axle shaft having a first end extending from the housing and a second end engaged to the gear train, wherein the gear train further comprises a differential bull gear. 6. A drive apparatus, comprising: a housing forming a sump;a center section disposed in the sump and comprising a first running surface for a motor cylinder block disposed on a first side thereof; a second running surface for a pump cylinder block disposed on a second side thereof, and a thrust spacer disposed on a third side of the center section opposite the first side;a motor shaft disposed in the sump and driven by the motor cylinder block;a gear train disposed in the housing and driven by the motor shaft, the gear train comprising a plurality of drive gears;a first axle shaft having a first end extending from the housing and a second end engaged to and driven by one of the plurality of drive gears;an output pinion gear fixed on the motor shaft, a first stage gear and a second pinion gear, wherein the first stage gear is disposed about and rotatably journalled on the first axle shaft and drivingly engaged to the output pinion gear and the second pinion gear; anda brake mechanism comprising a stationary pin adjacent to a first face of the first stage gear, a brake stator capable of bearing against the first stage gear and positioned on a second face of the first stage gear opposite the first face and a brake rotor having an inner gear form that engages the second pinion gear; and a brake puck capable of bearing against the brake rotor. 7. A drive apparatus, comprising: a housing;a center section disposed in the housing and comprising a motor running surface on a first side thereof and a thrust spacer disposed on a second side of the center section opposite the motor running surface;a motor cylinder block rotatably disposed on the motor running surface;a motor shaft engaged to and driven by the motor cylinder block; anda gear train comprising an output pinion gear fixed on the motor shaft, wherein the thrust spacer comprises arms disposed about a portion of the circumference of the output pinion gear. 8. A drive apparatus, comprising: a housing;a center section disposed in the housing and comprising a motor running surface on a first side thereof and a thrust spacer located on a second side of the center section opposite the motor running surface;a motor cylinder block rotatably disposed on the motor running surface;a motor shaft engaged to and driven by the motor cylinder block; anda gear train comprising an output pinion gear fixed on the motor shaft, wherein the thrust spacer is comprised of a spacer cup having a cup wall, the spacer cup being mounted to the center section, wherein the output pinion gear is located in an internal volume of the spacer cup. 9. The drive apparatus of claim 8, wherein openings are formed in the cup wall to permit oil flow from a sump formed in the housing into and out from the internal volume of the spacer cup and to provide an area for the output pinion gear to engage with a separate gear forming part of the gear train. 10. The drive apparatus of claim 9, wherein the spacer cup further comprises a first flange and a second flange, the first flange being shaped to fit within at least one pocket formed on the center section to prevent rotation of the spacer cup with respect to the center section and the second flange abutting against a washer. 11. The drive apparatus of claim 8, wherein the cup wall is circular. 12. A drive apparatus, comprising: a housing;a center section disposed in the housing and comprising a motor running surface on a first side thereof and a thrust spacer disposed on a second side of the center section opposite the motor running surface;a motor cylinder block rotatably disposed on the motor running surface;a motor shaft engaged to and driven by the motor cylinder block; anda gear train comprising an output pinion gear fixed on the motor shaft, wherein the gear train further comprises a first stage gear and a second pinion gear, and the drive apparatus further comprises: an axle shaft having a first end extending from the housing and a second end engaged to and driven by the gear train, wherein the first stage gear is disposed about and rotatably journalled on the axle shaft and drivingly engaged to the output pinion gear and the second pinion gear; anda brake mechanism comprising a stationary pin adjacent to a first face of the first stage gear, a brake stator capable of bearing against the first stage gear and positioned on a second face of the first stage gear opposite the first face and a brake rotor having an inner gear form that engages the second pinion gear; and a brake puck capable of bearing against the brake rotor. 13. A drive apparatus, comprising: a pump disposed in a housing;a motor disposed in the housing and hydraulically connected to the pump, the motor driving a motor shaft;a gear train comprising an output pinion gear fixed on the motor shaft, a first stage gear and a second pinion gear;an axle shaft having a first end extending from the housing and a second end engaged to and driven by the gear train, wherein the first stage gear is disposed about and rotatably journalled on the axle shaft and drivingly engaged to the output pinion gear and the second pinion gear; anda brake mechanism comprising a stationary pin adjacent to a first face of the first stage gear, a brake stator capable of bearing against the first stage gear and positioned on a second face of the first stage gear opposite the first face, and a brake rotor having an inner gear form that engages the second pinion gear, and a brake puck capable of bearing against the brake rotor. 14. The drive apparatus of claim 13, further comprising a brake arm having a cam in which the brake puck is disposed. 15. The drive apparatus of claim 13, further comprising a brake actuator extending out of housing, the brake actuator having a horizontal portion that is disposed external to the housing and is parallel to axis of rotation of the axle shaft. 16. A drive apparatus, comprising: a center section disposed in a housing and comprising a motor running surface for a motor cylinder block disposed on a first side thereof and a pump running surface for a pump cylinder block disposed on a second side thereof, wherein the pump running surface is perpendicular to the motor running surface;a motor shaft disposed in the housing and driven by the motor cylinder block;a gear train disposed in the housing and driven by the motor shaft, the gear train comprising a plurality of drive gears; anda thrust spacer disposed on a third side of the center section opposite and parallel to the first side, wherein the thrust spacer comprises a first portion disposed adjacent to the center section and a wall portion extending away from the center section and the second portion is disposed between at least one of the plurality of drive gears and the center section. 17. The drive apparatus of claim 16, wherein the wall portion of the thrust spacer comprises arms disposed about a portion of the circumference of an output gear disposed on the motor shaft. 18. The drive apparatus of claim 16, wherein the thrust spacer is comprised of a spacer cup mounted to the center section, and the wall portion is a circular cup wall.
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