IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0014843
(2008-01-16)
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등록번호 |
US-7624573
(2009-12-16)
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발명자
/ 주소 |
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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 :
1 인용 특허 :
49 |
초록
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A dual pump apparatus for use on a vehicle or industrial application having a housing in which a pair of hydraulic pumps are mounted and driven by a prime mover. The prime mover is drivingly coupled to a main input shaft, which drives the hydraulic pumps. An auxiliary pump may be drivingly coupled t
A dual pump apparatus for use on a vehicle or industrial application having a housing in which a pair of hydraulic pumps are mounted and driven by a prime mover. The prime mover is drivingly coupled to a main input shaft, which drives the hydraulic pumps. An auxiliary pump may be drivingly coupled to the main drive shaft and a power take off unit may also be connected thereto. The power take off unit may be driven by a power take off unit output drive shaft, on which a cooling fan may be attached.
대표청구항
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What is claimed is: 1. A drive apparatus for a vehicle, comprising: a main drive shaft; a power takeoff mechanism driven by the main drive shaft and comprising a power takeoff output shaft laterally offset from the main drive shaft; a first drive unit having a first input shaft and a second drive u
What is claimed is: 1. A drive apparatus for a vehicle, comprising: a main drive shaft; a power takeoff mechanism driven by the main drive shaft and comprising a power takeoff output shaft laterally offset from the main drive shaft; a first drive unit having a first input shaft and a second drive unit having a second input shaft symmetrically disposed about a plane containing the main drive shaft and the power takeoff output shaft, wherein the power takeoff output shaft, first input shaft and second input shaft are each disposed parallel to the main drive shaft; and a gear train connecting the main drive shaft to the first input shaft and the second input shaft. 2. The drive apparatus of claim 1, further comprising a power takeoff drive connecting the main drive shaft to the power takeoff output shaft. 3. The drive apparatus of claim 2, further comprising a housing covering the gear train and the power takeoff drive. 4. The drive apparatus of claim 2, wherein each drive unit further comprises a hydraulic pump, a separate hydraulic motor hydraulically connected to the hydraulic pump, and an axle shaft driven by the hydraulic motor. 5. The drive apparatus of claim 1, wherein the power takeoff mechanism comprises a power takeoff pump, a power takeoff motor driven by the power takeoff pump, and the power takeoff output shaft is driven by the power takeoff motor. 6. A drive apparatus comprising: a housing; a main input shaft at least partially disposed in the housing and driven by a prime mover; a first drive unit comprising a first drive unit input shaft extending generally parallel to the main input shaft and disposed at least partially within the housing and on one side of the main input shaft; a second drive unit comprising a second drive unit input shaft extending generally parallel to the main input shaft and disposed at least partially within the housing and on the opposite side of the main input shaft from the first drive unit input shaft; a first driving mechanism connecting the main input shaft to the first drive unit input shaft and the second drive unit input shaft; a power takeoff output shaft extending generally parallel to and offset from the main input shaft, the first drive unit input shaft and the second drive unit input shaft, the power takeoff output shaft being disposed approximately equidistant from the first and second drive unit input shafts; and a power takeoff mechanism operable to selectively provide drive from the main input shaft to the power takeoff output shaft. 7. The drive apparatus of claim 6, comprising a power takeoff input shaft extending generally parallel to the main input shaft and offset from the main input shaft on a side of the main input shaft that is generally opposite the power takeoff output shaft and approximately equidistant from the first and second drive unit input shafts. 8. The drive apparatus of claim 7, further comprising a second driving mechanism connecting the main input shaft to the power takeoff input shaft. 9. The drive apparatus of claim 8, further comprising a power takeoff hydraulic pump driven by the power takeoff input shaft, a power takeoff hydraulic motor driving the power takeoff output shaft and hydraulic porting extending from and hydraulically connecting the power takeoff hydraulic pump to the power takeoff hydraulic motor. 10. The drive apparatus of claim 9, wherein the first drive unit comprises a first hydraulic pump and the second drive unit comprises a second hydraulic pump and the first and second hydraulic pumps are mounted on a common support structure. 11. The drive apparatus of claim 10, wherein the power takeoff hydraulic pump is mounted on the common support structure. 12. The drive apparatus of claim 11, wherein the power takeoff hydraulic motor is mounted on the common support structure. 13. The drive apparatus of claim 8, wherein the first driving mechanism comprises a first gear train and the second driving mechanism comprises a second gear train. 14. The drive apparatus of claim 10, wherein the first drive unit comprises a first hydraulic motor and the second drive unit comprises a second hydraulic motor and the first hydraulic motor and the second hydraulic motor are located a distance from the portion of the drive apparatus containing the first hydraulic pump and the second hydraulic pump. 15. The drive apparatus of claim 10, comprising a charge pump, wherein the charge pump provides fluid to operate the power takeoff mechanism and provides charge fluid to the first hydraulic pump and the second hydraulic pump. 16. The drive apparatus of claim 15, wherein the charge pump is located on the common support structure. 17. The drive apparatus of claim 10, further comprising a first operating lever movable to adjust the displacement of the first hydraulic pump and a second operating lever movable to adjust the displacement of the second hydraulic pump, wherein the first operating lever and the second operating lever are positioned on opposite sides of the drive apparatus. 18. The drive apparatus of claim 10, wherein the first hydraulic pump and the second hydraulic pump are located on one side of the common support structure and the first driving mechanism is located on another, opposite side of the common support structure. 19. The drive apparatus of claim 6, further comprising a fan driven by the power takeoff output shaft. 20. The drive apparatus of claim 6, wherein the power takeoff mechanism comprises an electrically operable clutch to selectively couple the main input shaft to the power takeoff output shaft. 21. A drive apparatus comprising: a gear casing forming a chamber; a main input shaft driven by a prime mover and extending into the chamber; a first pump assembly driven by a first pump shaft, and a second pump assembly driven by a second pump shaft, wherein the first pump shaft and the second pump shaft extend into the chamber and are laterally offset from the main input shaft, with the first pump shaft to one side of the main input shaft and the second pump shaft to a second, opposite side of the main input shaft; a power takeoff assembly comprising a power takeoff input shaft driven by the main input shaft, wherein the power takeoff input shaft extends into the chamber; a first plurality of gears located in the chamber and drivingly connecting the main input shaft to the first pump shaft and the second pump shaft and comprising an input shaft gear disposed on the main input shaft; and a second plurality of gears located in the chamber and drivingly connecting the main input shaft to the power takeoff input shaft, wherein the second plurality of gears comprises the input shaft gear and at least one power takeoff input gear positioned on the power takeoff input shaft, and the input shaft gear is the only common gear between the first plurality of gears and the second plurality of gears. 22. The drive apparatus of claim 21, wherein the power takeoff assembly drives a power takeoff shaft laterally offset from a plane extending through at least two of the axes of the main input shaft, the first pump shaft and the second pump shaft. 23. The drive apparatus of claim 21, wherein the power takeoff assembly drives a power takeoff shaft and wherein the power takeoff shaft is generally parallel to the first and second pump shafts and offset from a plane that extends through the axes of rotation of the first and second pump shafts along a line that extends perpendicular from said plane and through the main input shaft. 24. The drive apparatus of claim 21, further comprising a power takeoff shaft driven by the power takeoff assembly, wherein a portion of the power takeoff assembly is located laterally of a line that extends through the main input shaft, the first pump shaft and the second pump shaft and another portion of the power takeoff assembly is located laterally of said line in a direction opposite the first portion. 25. A drive apparatus comprising: first and second hydraulic drive units, each of which drives a single axle, wherein the first hydraulic drive unit comprises a first hydraulic pump driven by a first pump shaft having a first axis of rotation and the second hydraulic drive unit comprises a second hydraulic pump driven by a second pump shaft having a second axis of rotation; a main input shaft located in the region between the first pump shaft and the second pump shaft and connected to and driven by a prime mover, wherein the main input shaft has a third axis of rotation; a power takeoff device selectively engageable to operate a driven mechanism, the power takeoff device having an power takeoff input shaft having a fourth axis of rotation, wherein the power takeoff shaft is displaced sideways from the first pump shaft, the second pump shaft and the main input shaft, and approximately equidistant from the first and second pump shafts; a gear casing attached to and extending across the drive apparatus to enclose a volume, wherein a least a portion of the first pump shaft, the second pump shaft, the main input shaft and the power takeoff input shaft extend into the volume; a first drive train disposed in the gear casing to drivingly connect the main input shaft to the first and second pump shafts; and a second drive train disposed in the gear casing to drivingly connect the main input shaft to the power takeoff input. 26. The drive apparatus of claim 25, wherein the first, second and third axes of rotation lie generally in a plane, and the fourth axis of rotation is offset from said plane and is approximately equidistant from the first and second axes.
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