Tractor suspension with tensioned drive shaft
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60K-017/00
출원번호
US-0232373
(2005-09-21)
등록번호
US-7284633
(2007-10-23)
발명자
/ 주소
Bordini,Giorgio
출원인 / 주소
CNH America LLC
인용정보
피인용 횟수 :
2인용 특허 :
11
초록▼
An agricultural tractor rear suspension system having a longitudinally extending suspension arm pivotally coupled to the tractor chassis at one end and to a planetary gearbox at the opposing end, a differential connected to the tractor chassis, and a driveshaft rotatably supported at one end by the
An agricultural tractor rear suspension system having a longitudinally extending suspension arm pivotally coupled to the tractor chassis at one end and to a planetary gearbox at the opposing end, a differential connected to the tractor chassis, and a driveshaft rotatably supported at one end by the planetary gearbox and supported at the other end by the differential housing wherein the driveshaft is configured to resist suspension arm flexural by communicating tensile and compressive forches from the suspension arm to the tractor chassis.
대표청구항▼
I claim: 1. A rear tractor suspension for a tractor chassis having a differential mounted in a differential housing, the suspension comprising: a longitudinally extending suspension arm pivotally coupled to the chassis; a planetary gearbox fixed to the suspension arm; and a drive shaft rotatably su
I claim: 1. A rear tractor suspension for a tractor chassis having a differential mounted in a differential housing, the suspension comprising: a longitudinally extending suspension arm pivotally coupled to the chassis; a planetary gearbox fixed to the suspension arm; and a drive shaft rotatably supported at one end by the planetary gearbox, and rotatably supported at another end by the differential housing, wherein the drive shaft is configured to reduce additional outward flexure of the suspension arm when the suspension arm is outwardly flexed, and to reduce additional inward flexure of the suspension arm when the suspension arm is inwardly flexed. 2. The suspension of claim 1, wherein the drive shaft further comprises first and second stub shafts coupled together to permit the stub shafts relative longitudinal sliding movement and to communicate a longitudinal tensile load when suspension arm is flexed. 3. The suspension of claim 1, wherein the drive shaft is configured to be placed in longitudinal compression during elastic deformation of the suspension arm inward toward the chassis and to be placed in longitudinal tension during elastic deformation of the suspension arm outward away from the chassis, respectively. 4. The suspension of claim 3, wherein the tension and the compression communicate a load from the suspension arm to the chassis of the vehicle. 5. The suspension of claim 1, wherein the drive shaft reduces outward flexure of the suspension arm by being placed in tension and wherein the drive shaft reduces inward flexure of the suspension arm by being placed in compression. 6. The suspension of claim 1, wherein the drive shaft further comprises: first and second flexible shaft couplings; and a sliding coupling that is coupled to and between the first and second flexible shaft couplings. 7. A rear suspension for an agricultural tractor having a chassis comprised of an engine, a transmission and rear differential housing fixed together to form an elongate rigid member, the suspension comprising: a longitudinally extending suspension arm coupled to the chassis to pivot with respect thereto about a laterally-extending axis; a planetary gearbox fixed to the suspension arm; and a drive shaft rotatably supported at one drive shaft end by the planetary gearbox and rotatably supported at another drive shaft end by the tractor chassis, wherein the drive shaft is configured to be longitudinally compressed to reduce lateral inward flexure of the suspension arm, and configured to be longitudinally tensioned to reduce lateral outward flexure of the suspension arm during normal operation. 8. The suspension of claim 7, wherein the drive shaft further comprises first and second stub shafts coupled together with a sliding coupling to communicate torque from one stub shaft to the other stub shaft, to permit sliding relative longitudinal movement of the stub shafts, to communicate a tensile load from one stub shaft to the other stub shaft when the coupling is collapsed, and to communicate a compressive load from one stub shaft to the other stub shaft when the coupling is extended. 9. The suspension of claim 8 wherein the sliding coupling is configured to be placed in longitudinal tension by flexure of the suspension arm away from the chassis of the tractor and placed in longitudinal compression by flexure of the suspension arm toward the chassis of the tractor. 10. The suspension of claim 9, wherein the tension and the compression communicate a load on the suspension arm to the chassis of the vehicle. 11. The suspension of claim 7, wherein the drive shaft further comprises first and second flexible shaft couplings connected by a sliding coupling to communicate torque from one shaft coupling to the other, the first and second flexible shaft couplings disposed in the drive shaft to support opposing ends of the sliding coupling. 12. The suspension of claim 7, wherein the drive shaft reduces outward suspension arm flexure by being placed in tension and reduces inward suspension arm flexure by being placed in compression. 13. A rear tractor suspension for a tractor chassis having a differential mounted in a differential housing, the suspension comprising: a longitudinally extending suspension arm pivotally coupled to the chassis; a planetary gearbox fixed to the suspension arm; and a means for rotatably driving the planetary gearbox, said means being supported for rotation both by the planetary gearbox and by the tractor chassis, wherein the means for rotatably driving is configured to be longitudinally tensioned and compressed during when the suspension arm is flexed. 14. The suspension of claim 13, wherein the means for rotatably driving further comprises: first flexible coupling means; second flexible coupling means; and slidable coupling means; wherein the first flexible coupling means is fixed to a first end of the slidable coupling means and the second flexible coupling means is fixed to another end of the slidable coupling means. 15. The suspension of claim 14, wherein the slidable coupling means includes means for telescopically extending and retracting and means for transmitting torque. 16. The suspension of claim 15, wherein the tension and the compression communicate a load on the suspension arm to the chassis of the vehicle. 17. The suspension of claim 14, wherein the slidable coupling means reduces outward arm flexure by being placed in tension and reduces inward arm flexure by being placed in compression. 18. The suspension of claim 14, wherein one end of the slidable coupling means comprises a cup having internal splines. 19. The suspension of claim 18, wherein the other end of the slidable coupling means comprises a cylinder having external splines. 20. The suspension of claim 19, wherein the cylinder is slidably supported within the cup and the internal splines are engaged with the external splines. 21. The suspension of claim 13, wherein the slidable coupling means is configured to be placed in longitudinal compression by non-plastic deformation of the suspension arm inward toward the chassis and in longitudinal tension by non-plastic deformation of the suspension arm outward away from the chassis, respectively.
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