IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0374630
(2006-03-13)
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등록번호 |
US-7326141
(2008-02-05)
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발명자
/ 주소 |
- Lyons,Arthur P.
- Mancini,Bart Winter
|
출원인 / 주소 |
- BAE Systems Information and Electronic Systems Integration Inc.
|
대리인 / 주소 |
Scully Scott Murphy & Presser, PC
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인용정보 |
피인용 횟수 :
12 인용 특허 :
6 |
초록
▼
A transmission drive system (TDS) has two AC induction traction motors, each operatively coupled to two semi-independent coaxial traction shafts, and two AC induction steer motors coaxially mounted on a common steer axis parallel to the coaxial traction shafts. A steering gear assembly, preferably b
A transmission drive system (TDS) has two AC induction traction motors, each operatively coupled to two semi-independent coaxial traction shafts, and two AC induction steer motors coaxially mounted on a common steer axis parallel to the coaxial traction shafts. A steering gear assembly, preferably between the traction and steering motors, has a common steer input shaft operatively connected to the two AC induction steering motors. Two planetary gear sets have the two traction shafts being operatively connected with one of a two planet gear carriers, or two ring gears, respectively. The other of the planet gear carriers or the ring gears are operatively connected with each other. Two offset gears mounted to the steer input shaft and meshing with two sun gears, respectively, including a reversing idler gear interposed between one of the two offset gears and one of the two sun gears.
대표청구항
▼
The invention claimed is: 1. A transmission drive system for a differential speed steered vehicle, the system comprising: first and second AC induction traction motors, each operatively coupled to first and second semi-independent coaxial traction shafts, respectively; first and second AC induction
The invention claimed is: 1. A transmission drive system for a differential speed steered vehicle, the system comprising: first and second AC induction traction motors, each operatively coupled to first and second semi-independent coaxial traction shafts, respectively; first and second AC induction steer motors coaxially mounted on a common steer axis parallel to the coaxial traction shafts; and a steering gear assembly comprising: a common steer input shaft operatively connected to the two AC induction steering motors; first and second planetary gear sets, the first and second traction shafts being operatively connected with one of a first and second planet gear carrier, or a first and second ring gear, respectively, of the first and second planetary gear sets, the other of the first and second planet gear carriers or the first and second ring gears being operatively connected with each other; first and second offset gears mounted to the steer input shaft and meshing with a first and second sun gear, respectively, of the first and second planetary gear sets; and a reversing idler gear interposed between one of the first and second offset gears and one of the first and second sun gears. 2. The transmission drive system according to claim 1, wherein the steering gear assembly is interposed between the two AC induction steer motors and between the two AC induction traction motors. 3. The transmission drive system according to claim 1, wherein the speed steered vehicle is a track-laying vehicle. 4. The transmission drive system according to claim 1, further comprising first and second clutch mechanisms operative to selectively engage the first and second AC induction traction motors with the first and second coaxial traction shafts. 5. The transmission drive system according to claim 4, wherein the first and second clutch mechanisms comprise a neutral fault position that disengages the first or second AC induction traction motors from the first or second coaxial traction shafts. 6. The transmission drive system according to claim 4, wherein the first and second clutch mechanisms are operative to selectively alter a turning speed of the first or second coaxial traction shafts relative to the first or second AC induction traction motors. 7. The transmission drive system according to claim 1, further comprising first an second AC induction pump motors operatively connected to an driving first and second tandem hydraulic pumps. 8. The transmission drive system according to claim 6, wherein said first and second hydraulic pumps are selectively driven by a overrunning clutch driven by motion of the speed steered vehicle. 9. The transmission drive system according to claim 7, wherein said first and second hydraulic pumps circulate oil through the transmission drive system. 10. The transmission drive system according to claim 1, further comprising first and second semi-independent electronics modules, each providing power to and control of the first and second AC induction traction motor and the first and second AC induction steering motors, respectively. 11. The transmission drive system according to claim 9, wherein the first and second semi-independent electronics modules provide dual redundant power and control structure. 12. The transmission drive system according to claim 9, wherein the first and second semi-independent electronics modules further comprise means for conducting regenerative braking by the first and second AC induction traction motors. 13. The transmission drive system according to claim 10, wherein the first and second semi-independent electronics modules provide space vector control of the first and second AC induction traction motor and the first and second AC induction steering motors, respectively. 14. The transmission drive system according to claim 1, further comprising first and second mechanical braking subassemblies. 15. The transmission drive system according to claim 14, wherein the mechanical braking subassemblies are manually actuated. 16. The transmission drive system according to claim 14, wherein the mechanical braking subassemblies are hydraulically actuated. 17. The transmission drive system according to claim 1, wherein the transmission drive system is sealed against the ingress of foreign gas, liquid or particulate. 18. The transmission drive system according to claim 17, wherein the transmission drive system is ported for the interface of electrical power and control signals, coolant liquid and mechanical brake actuation. 19. The transmission drive system according to claim 1, further comprising first and second output couplings for delivering output speed and torque from the transmission drive system. 20. The transmission drive system according to claim 19, wherein the first and second output couplings are tolerant of misalignment.
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