Selectable overspeed secondary drive module
First Claim
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1. A vehicle drive system comprising:
- a primary axle driven by torque from a transmission;
an output shaft driven by the primary axle or transmission;
a secondary axle;
a secondary axle clutch configured to operatively connect the secondary axle with the output shaft; and
a secondary axle drive module operatively connected between the output shaft and secondary axle, said drive module including an overspeed gear set connected in parallel with a one way clutch to facilitate application of torque to the secondary axle even when the secondary axle is rotating faster than the primary axle.
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Abstract
A vehicle drive system includes a primary axle driven by torque from a transmission, an output shaft or propeller shaft driven by the primary axle or transmission, a secondary axle, a secondary axle clutch, and a secondary axle drive module. The secondary axle clutch is configured to operatively connect the secondary axle with the output shaft. The secondary axle drive module is operatively connected between the output shaft and secondary axle. The drive module includes an overspeed gear set connected in parallel with a one-way clutch to facilitate application of torque to the secondary axle even when the secondary axle is rotating faster than the primary axle.
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Citations
20 Claims
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1. A vehicle drive system comprising:
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a primary axle driven by torque from a transmission;
an output shaft driven by the primary axle or transmission;
a secondary axle;
a secondary axle clutch configured to operatively connect the secondary axle with the output shaft; and
a secondary axle drive module operatively connected between the output shaft and secondary axle, said drive module including an overspeed gear set connected in parallel with a one way clutch to facilitate application of torque to the secondary axle even when the secondary axle is rotating faster than the primary axle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A secondary axle drive system configured for use in a vehicle having a primary axle and a longitudinal propeller shaft, the secondary axle drive system comprising:
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a secondary axle;
a secondary axle clutch configured to operatively connect the secondary axle with the propeller shaft; and
a secondary axle drive module operatively connected between the propeller shaft and secondary axle, said drive module including an overspeed gear set connected in parallel with a one-way clutch to facilitate selective application of torque to the secondary axle even when the secondary axle is rotating faster than the primary axle. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A vehicle drive system comprising:
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a primary axle driven by torque from a transmission;
an output shaft driven by the primary axle or transmission;
a secondary axle;
a secondary axle clutch configured to operatively connect the secondary axle with the output shaft;
a secondary axle drive module operatively connected between the output shaft and secondary axle, said drive module including an overspeed gear set connected in parallel with a one-way clutch to facilitate selectively rotating the secondary axle faster than the primary axle so that greater torque is applied at the secondary axle than the primary axle;
an angle gear set operatively connected between the output shaft and the drive module; and
said overspeed gear set including first and second intermeshed gears forming a first subset and third and fourth intermeshed gears forming a second subset, wherein the first gear is connected to the angled gear set, the second gear is affixed to the third gear, and the fourth gear is selectively engageable with the secondary axle through an overspeed clutch, said first, second, third and fourth gears being sized so that the fourth gear rotates faster than the first gear. - View Dependent Claims (20)
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Specification