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US 7,000,724 B2Granted
Skid steer vehicle with bogie suspension
AssigneeCNH America LLC
InventorsAnthony J. Lamela, Brian E. Felsing, Troy D. Bateman
Life of this patent
Estimating the term…
Abstract
A skid steer vehicle has a suspension that includes two bogies pivotally connected to the sides of the vehicle and extending fore-and-aft along each side of the vehicle. The bogies are pivotally connected to the vehicle in the middle and have a wheel mounted at each end. A hydraulic motor is coupled to each of the bogies and drives the two wheels on each bogie.
Claims19
A skid steer vehicle comprising:
- a chassis having a right side, a left side, a front end, and a rear end, said chassis defining a lateral axis that extends from the left side to the right side of the chassis parallel to the ground;
- an internal combustion engine mounted on the chassis;
- first and second hydraulic pumps coupled to the engine to be driven thereby;
- a left side suspension including a left side suspension beam having a front end and a rear end and a central portion, wherein said left beam extends fore-and-aft along a left side of the vehicle, and further wherein said left beam is pivotally coupled to the chassis at said central portion thereof to pivot said left beam about said lateral axis with respect to said chassis, a left front wheel coupled to the front end of the left beam at a location forward of the central portion, a left wheel coupled to the rear end of the left beam rearward of the central portion, and a first hydraulic motor mounted to the left side suspension beam, wherein said first motor is drivingly coupled to the front wheel and the rear wheel;
- and
- a right side suspension including a right side suspension beam having a front end and a rear end and a central portion, wherein said right beam extends fore-and-aft along a right side of the vehicle, and further wherein said right beam is pivotally coupled to the chassis at said central portion thereof to pivot said right beam about said lateral axis with respect to said chassis, a right front wheel coupled to the front end of the right beam at a location forward of the central portion, a right rear wheel coupled to the rear end of the right beam rearward of the central portion, and a second hydraulic motor mounted to the right beam, wherein said second motor is drivingly coupled to the front wheel and the rear wheel, wherein the first motor is fixed to the left beam to pivot therewith and wherein the second motor is fixed to the right beam to pivot therewith.
3 more elements
A suspension for a skid steer vehicle, said vehicle having a chassis with left and right sides, a longitudinal axis, a lateral axis, an internal combustion engine and first and second hydraulic pumps coupled to the engine to be driven thereby, the suspension comprising:
- a first suspension beam having a front end and a rear end and a central portion wherein said first beam is configured to extend fore-and-aft along a first side of the vehicle, and further wherein said first beam is configured to be pivotally coupled to the chassis at said central portion of said first beam to pivot said first beam about said lateral axis with respect to said chassis;
- a first front wheel coupled to the front end of the first beam at a location forward of the central portion thereof;
- a first rear wheel coupled to the rear end of the first beam rearward of the central portion;
- and
- a first hydraulic motor fixed to the first beam to pivot therewith, wherein said first motor is drivingly coupled to the first front wheel and the first rear wheel and is configured to be coupled to and driven by the first hydraulic pump.
2 more elements
A suspension for a skid steer vehicle, said vehicle having a chassis with left and right sides, a longitudinal axis, a lateral axis, an internal combustion engine and first and second hydraulic pumps coupled to the engine to be driven thereby, the suspension comprising:
- a first suspension beam having a front end and a rear end and a central portion wherein said first beam is configured to extend fore-and-aft along a first side of the vehicle, and further wherein said first beam is configured to be pivotally coupled to the chassis said central portion of said first beam to pivot said first beam about said lateral axis with respect to said chassis;
- a first front wheel coupled to the front end of the first beam at a location forward of the central portion thereof;
- a first rear wheel coupled to the rear end of the first begin rearward of the central portion,
- a first hydraulic motor fixed to the first beam to pivot therewith, wherein said first motor is drivingly coupled to the first front wheel and the first rear wheel and is configured to be coupled to and driven by the first hydraulic pump;
- a first driveshaft extending longitudinally through the first suspension beam from the first front wheel to the first rear wheel, wherein the first driveshaft is configured to drive both the first front and rear wheels on rotation, and further wherein the first driveshaft is driven by the first hydraulic motor, which is fixed to the central portion of the first beam;
- a second suspension beam having a front end and a rear end and a central portion wherein said second beam is configured to extend fore-and-aft along a second side of the vehicle opposite the first side of the vehicles, and further wherein said second beam is configured to be pivotally coupled to the chassis at said central portion of said second beam to pivot said second beam about said lateral axis with respect to said chassis;
- a second front wheel coupled to the front end of the second beam at a location forward of the central portion;
- a second rear wheel coupled to the rear end of the second beam rearward of the central portion thereof;
- a second hydraulic motor fixed to the second beam to pivot therewith, wherein said second motor is drivingly coupled to the second front wheel and the second rear wheel and is configured to be coupled to and driven by the second hydraulic pump;
- and
- a second driveshaft extending longitudinally through the second suspension beam from the second front wheel to the second rear wheel, wherein the second driveshaft is configured to drive both the second front and rear wheels in rotation, and further wherein the second driveshaft is driven by the second hydraulic motor, which is fixed to the central portion of the second beam.
8 more elements
Dependencies are inferred from the claim text.