Powertrain For A Road Cleaning Vehicle
First Claim
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1. A powertrain for a road sweeping vehicle comprising:
- a power unit operably connected to a primary gearbox; and
a hydrostatic gearbox comprising;
a casing having an internal volume and comprising first and second sections and a plurality of passageways, wherein the first and second sections each comprise walls having edges, the first and second sections being fastened together at the edges, and each passageway extends through the walls and is defined by the edges of both the first and second sections;
an input shaft having an integral gear extending orthogonally therefrom and having an outer portion extending outside of the internal volume of the casing;
an output shaft selectively engageable with the input shaft;
a pump drive shaft operable to be driven by the input shaft gear; and
a motor driven shaft operable to drive the output shaft, wherein the shafts extend within the casing and are each mounted in one of the passageways,said powertrain further comprising;
a first mounting arrangement connected to the output of the primary gearbox and located on the outer portion of the input shaft;
a second mounting arrangement connected to a drivetrain and located on the output shaft;
a hydraulic motor drivably connected to the motor driven shaft; and
at least one hydraulic pump drivably connected to the pump drive shaft and hydraulically connected to one or more road cleaning tools and/or the hydraulic motor.
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Abstract
This invention is directed toward a powertrain for a road cleaning vehicle. In particular, the powertrain includes a hydrostatic gearbox (34) having a casing (50) for directing power from a primary gearbox to a drivetrain and/or one or more road cleaning tools. The casing (50) comprises first and second sections (51, 52) and a plurality of passageways (107, 107) defined by the edges of both the first and second sections (51, 52). An input shaft is provided having an integral gear extending orthogonally therefrom and having an outer portion extending outside of the internal volume of the casing.
26 Citations
21 Claims
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1. A powertrain for a road sweeping vehicle comprising:
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a power unit operably connected to a primary gearbox; and a hydrostatic gearbox comprising; a casing having an internal volume and comprising first and second sections and a plurality of passageways, wherein the first and second sections each comprise walls having edges, the first and second sections being fastened together at the edges, and each passageway extends through the walls and is defined by the edges of both the first and second sections; an input shaft having an integral gear extending orthogonally therefrom and having an outer portion extending outside of the internal volume of the casing; an output shaft selectively engageable with the input shaft; a pump drive shaft operable to be driven by the input shaft gear; and a motor driven shaft operable to drive the output shaft, wherein the shafts extend within the casing and are each mounted in one of the passageways, said powertrain further comprising; a first mounting arrangement connected to the output of the primary gearbox and located on the outer portion of the input shaft; a second mounting arrangement connected to a drivetrain and located on the output shaft; a hydraulic motor drivably connected to the motor driven shaft; and at least one hydraulic pump drivably connected to the pump drive shaft and hydraulically connected to one or more road cleaning tools and/or the hydraulic motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20)
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12. A powertrain as claimed in 11 wherein the second gear selector comprises:
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an actuator mounted to the outside of the casing; a piston rod extending into the casing from the actuators; and a selector arm connected to the piston rods and engaged with a second clutch, wherein the second clutch is arranged to selectively engage the input and pump drive shafts together. - View Dependent Claims (13)
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21-23. -23. (canceled)
Specification