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US 12,343,576 B2Granted
Sandwiched power take-off (PTO) for a vehicle
AssigneeOshkosh Corporation
InventorsEric Linsmeier, David Fieber
Life of this patent
Estimating the term…
Abstract
A fire apparatus includes a chassis, a cab coupled to the chassis, a pump system coupled to the chassis and positioned at least partially behind the cab, and a driveline. The pump system includes a pump. The driveline includes a prime mover positioned beneath the cab and coupled to the chassis, a transmission, and a sandwiched power take-off unit positioned between (a) the prime mover and (b) the transmission and the pump system. The sandwiched power take-off unit facilitates operating the pump independent of a gear selection of the transmission and a ground speed of the fire apparatus.
Claims17
A fire apparatus comprising:
- a chassis;
- a cab coupled to the chassis;
- a pump system coupled to the chassis and positioned at least partially behind the cab, the pump system including a pump;
- and
- a driveline including:
- a prime mover positioned beneath the cab and coupled to the chassis;
- a transmission;
- and
- a sandwiched power take-off unit positioned between (a) the prime mover and (b) the transmission and the pump system;
- wherein the sandwiched power take-off unit facilitates operating the pump independent of a gear selection of the transmission and a ground speed of the fire apparatus;
- and
- wherein the sandwiched power take-off unit includes:
- a main drive shaft positioned between the prime mover and the transmission;
- a pump drive shaft coupled to the pump;
- and
- a gear train including a plurality of gears that couple the main drive shaft to the pump drive shaft, wherein the gear train includes a drive gear defining an aperture that receives the main drive shaft;
- and
- a bearing received by the aperture and positioned between the main drive shaft and the drive gear.
15 more elements
A fire apparatus comprising:
- a chassis;
- a cab coupled to the chassis;
- a pump system coupled to the chassis and positioned at least partially behind the cab, the pump system including a pump;
- and
- a driveline including:
- a prime mover positioned beneath the cab and coupled to the chassis;
- a transmission;
- and
- a sandwiched power take-off unit positioned between (a) the prime mover and (b) the transmission and the pump system;
- wherein the sandwiched power take-off unit facilitates operating the pump independent of a gear selection of the transmission and a ground speed of the fire apparatus;
- and
- wherein the sandwiched power take-off unit includes:
- a main drive shaft positioned between the prime mover and the transmission;
- a pump drive shaft coupled to the pump;
- a gear train including a plurality of gears that couple the main drive shaft to the pump drive shaft, wherein the gear train includes a drive gear coupled to the main drive shaft, an output gear coupled to the pump drive shaft, and an intermediate gear positioned between the drive gear and the output gear;
- a main housing having a support extending through an interior chamber thereof;
- and
- an auxiliary shaft received by the support, wherein the intermediate gear is disposed on the auxiliary shaft, and wherein the auxiliary shaft defines a fluid passage that facilitates fluidly coupling the intermediate gear to a lubrication source.
15 more elements
A fire apparatus comprising:
- a chassis;
- a cab coupled to the chassis;
- a pump system coupled to the chassis and positioned at least partially behind the cab, the pump system including a pump;
- and
- a driveline including:
- a prime mover positioned beneath the cab and coupled to the chassis;
- a transmission;
- and
- a sandwiched power take-off unit positioned between (a) the prime mover and (b) the transmission and the pump system;
- wherein the sandwiched power take-off unit facilitates operating the pump independent of a gear selection of the transmission and a ground speed of the fire apparatus;
- and
- wherein the sandwiched power take-off unit includes:
- a main drive shaft positioned between the prime mover and the transmission;
- a pump drive shaft coupled to the pump;
- a gear train including a plurality of gears that couple the main drive shaft to the pump drive shaft;
- a sleeve disposed along the main drive shaft;
- and
- an adapter plate coupled to an output of the prime mover and the sleeve.
15 more elements
A vehicle comprising:
- a vehicle accessory;
- and
- a driveline including:
- a prime mover;
- a transmission;
- and
- a sandwiched power take-off unit positioned between (a) the prime mover and (b) the transmission and the vehicle accessory, the sandwiched power take-off unit including:
- a main housing defining an interior chamber, the main housing have a support extending through the interior chamber;
- a main drive shaft disposed within the interior chamber and extending through the support;
- a power take-off drive shaft coupled to the vehicle accessory;
- a gear train including a drive gear coupled to the main drive shaft, an output gear coupled to the power take-off drive shaft, and an intermediate gear positioned between the drive gear and the output gear;
- an adapter plate coupled to an output of the prime mover, the adapter plate defining a central bore that receives an end of the main drive shaft without a bearing positioned therebetween;
- a first bearing positioned between the main drive shaft and the drive gear;
- a second bearing positioned between the main drive shaft and the support;
- an auxiliary shaft received by the support, wherein the intermediate gear is disposed on the auxiliary shaft;
- and
- a clutch positioned to facilitate selectively disconnecting the vehicle accessory from the main drive shaft.
14 more elements
Dependencies are inferred from the claim text.