An agricultural vehicle having a full-track design with a vehicle structure on each side of which, relative to a vehicle longitudinal axis, a track roller unit is arranged. The track roller unit has roller unit body to which a front deflector roll, a rear deflector roller and a plurality of yoke-typ
An agricultural vehicle having a full-track design with a vehicle structure on each side of which, relative to a vehicle longitudinal axis, a track roller unit is arranged. The track roller unit has roller unit body to which a front deflector roll, a rear deflector roller and a plurality of yoke-type track rollers arranged therebetween are coupled, and an endlessly closed track belt that wraps around the rollers/roller. All the rollers are suspended with respect to the roller unit body in that assigned to a roller or a group of rollers in each case is a spring element, which is acted upon by fluid, for the suspension thereof with respect to the roller unit body.
대표청구항▼
1. An agricultural vehicle having a full-track design and a vehicle structure, on each side of which, relative to a vehicle longitudinal axis, a track roller unit is arranged to support the vehicle with respect to a ground, the track roller unit comprising: a roller unit body,a front deflector rolle
1. An agricultural vehicle having a full-track design and a vehicle structure, on each side of which, relative to a vehicle longitudinal axis, a track roller unit is arranged to support the vehicle with respect to a ground, the track roller unit comprising: a roller unit body,a front deflector roller coupled to a front of the roller unit body,a rear deflector roller coupled to a rear of the roller unit body;a plurality of yoke track rollers arranged between the front deflector roller and the rear deflector roller and coupled to the roller unit body; andan endlessly closed track belt, which wraps at least around the front deflector roller, the rear deflector roller and the yoke track rollers;wherein all of the rollers of the track roller unit are suspended with respect to the roller unit body by hydropneumatic spring elements and wherein the hydropneumatic spring elements are acted upon by fluid for suspending the rollers with respect to the roller unit body. 2. The agricultural vehicle according to claim 1, wherein the roller unit body is attached to the vehicle structure. 3. The agricultural vehicle according to claim 1, wherein the roller unit body of the track roller unit is an integral component of the vehicle structure. 4. The agricultural vehicle according to claim 1, wherein the track roller unit further comprises means for distributing a ground pressure proceeding from the vehicle onto individual ones of the hydropneumatic spring elements, onto one or more groups of the hydropneumatic spring elements or both. 5. The agricultural vehicle according to claim 1, wherein the track roller unit further comprises a fluid system for supplying the fluid to the hydropneumatic spring elements and wherein certain hydropneumatic spring elements are selected depending on an event are interconnected in a separate fluid circuit to form a suspension unit. 6. The agricultural vehicle according to claim 5, wherein the suspension unit formed by the separate fluid circuit has a pendulum point (Pa, Pb), which forms a virtual axle of the agricultural vehicle. 7. The agricultural vehicle according to claim 5, wherein at least one of the hydropneumatic spring elements of the track roller unit is assigned to a front suspension unit to form a virtual front axle and at least one of the hydropneumatic spring elements of the track roller unit is assigned to a rear suspension unit to form a virtual rear axle. 8. The agricultural vehicle according to claim 7, wherein at least one yoke track roller is assigned either to the virtual front axle or to the virtual rear axle, depending on an operating parameter of the vehicle comprising a pressure load, a vehicle state or both, by connecting the associated hydropneumatic spring element to a corresponding fluid circuit. 9. The agricultural vehicle according to claim 8, wherein the hydropneumatic spring elements are assigned sensors for detecting a pressure state therein and wherein at least one of the yoke track rollers is assigned depending on the detected pressure state one or more of the hydropneumatic spring elements. 10. The agricultural vehicle according to claim 1, further comprising means for influencing a pressure distribution between hydropneumatic spring elements positioned in a front portion of the track roller unit and hydropneumatic spring elements positioned in a rear portion of the track roller unit depending on a detected tractive force (FZug) of the vehicle. 11. The agricultural vehicle according to claim 7, further comprising means for influencing the fluid pressures of a fluid circuit associated with the virtual front axle, a fluid circuit associated with the virtual rear axle or both depending on detected operating parameters of the vehicle. 12. The agricultural vehicle according to claim 11, wherein the vehicle is operated in a street-travel mode, in which the hydropneumatic spring elements of the virtual front axle are acted upon by a pressure that is reduced as compared to that of a field-travel mode. 13. The agricultural vehicle according to claim 7, wherein the hydropneumatic spring elements of the virtual front axle are acted upon by a pressure that depends on an applied tractive force (FZug) of the vehicle to reduce a sum of effective torques at the track roller unit. 14. The agricultural vehicle according to claim 10, wherein the hydropneumatic spring element in the rear portion of the track roller unit is acted upon by increased fluid pressure via individual control to prevent the track roller unit from lifting up in an event of particularly high tractive force (FZug). 15. The agricultural vehicle according to claim 1, wherein one or more rollers are coupled to the roller unit body via linkages. 16. The agricultural vehicle according to claim 1, wherein the front deflector roller and a yoke track roller located behind the front deflector roller relative to the vehicle longitudinal axis are connected to the roller unit body via a common support arrangement and wherein one of the spring elements is assigned to the common support arrangement for suspension thereof with respect to the roller unit body. 17. The agricultural vehicle according to claim 16, wherein the common support arrangement comprises a longitudinal swing arm coupled to the roller unit body, wherein an arm is coupled to the longitudinal swing arm, wherein the front deflector roller is supported at the arm, wherein one of the yoke track rollers is supported at the longitudinal swing arm and wherein a tensioning device is assigned to the arm that is acted upon by fluid pressure in order to apply tension in the track belt. 18. The agricultural vehicle according to claim 17, wherein the tensioning device is a cylinder.
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이 특허에 인용된 특허 (4)
Janzen, David C.; Satzler, Ronald L., Configuration of a two-track tractor.
Fischer ; deceased Frederick C. (72 Wimberly Dr. late of Rochester MI) Fischer ; heir by Carole M. (72 Wimberly Dr. Rochester MI 48063), Turning assistance for tracked vehicles.
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