US 7,243,575 B2Granted

Braking mechanism for a gear

AssigneeBrp-Rotax GmbH & Co. KG

InventorGerhard Niederwimmer

Life of this patent

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Abstract

An indexing and braking mechanism for a manual transmission having a shifting mechanism and at least one rotatable drive shaft is disclosed. The mechanism includes an indexing mechanism for controlling movement of the shifting mechanism between at least a first position and a neutral position. The indexing mechanism has a plate having a plurality of notches formed thereon, wherein one notch corresponds to the first position and another notch corresponds to the neutral position. A locking mechanism is provided for selectively limiting movement of one of the at least one rotatable drive shaft. The locking mechanism is adapted to selectively engage the plurality of notches to selectively maintain the indexing mechanism in one of the first position and the neutral position. The locking mechanism includes an indexing lever having a contact surface for contacting the rotatable drive shaft.

Claims27

Dependent claims

A drive train for a vehicle, wherein the vehicle includes a drive unit and a driven shaft, wherein the drive train transfers energy generated by the drive unit to the driven shaft, the drive train comprising:

a continuously variable transmission operatively connected to the drive unit;
a manual transmission having a rotating drive shaft;
a free wheel clutch operatively coupling the continuously variable transmission to the drive shaft such that torque from the drive unit is transferred to the continuously variable transmission then to the drive shaft via the free wheel clutch when the free wheel clutch is engaged;
wherein the manual transmission further includes an intermediate drive shaft, wherein the intermediate drive shaft is operatively connected to the drive shaft and the driven shaft, wherein the intermediate drive shaft has an idler gear located thereon, wherein the idler gear is operatively coupled to the rotating drive shaft;
wherein the intermediate drive shaft is operatively engaged with the driven shaft when the manual transmission is in at least one drive position, and the intermediate drive shaft is operatively disengaged from the driven shaft when the manual transmission is in a neutral position, wherein the manual transmission further includes a shifting mechanism to shift the manual transmission between the at least one drive position and the neutral position;
and
a shift gate for controlling movement of the shifting mechanism between the drive position and the neutral position, wherein the shift gate has a plurality of notches formed thereon, wherein at least one notch corresponds to the drive position and another notch corresponds to the neutral position;
and
an indexing lever adapted to be selectively received in one of the plurality of notches to selectively maintain the shift gate in one of the at least one drive position and the neutral position.

6 more elements

a continuously variable transmission operatively connected to the drive unit;
a manual transmission having a rotating drive shaft;
a free wheel clutch operatively coupling the drive unit to the drive shaft during predetermined engine operating conditions;
a centrifugal clutch operatively coupling the drive unit to the drive shaft during predetermined engine operating conditions;
the free wheel clutch and the centrifugal clutch being arranged in parallel, and
wherein the manual transmission further includes an intermediate drive shaft, wherein the intermediate drive shaft is operatively connected to the drive shaft and the driven shaft;
wherein the intermediate drive shaft is operatively engaged with the driven shaft when the manual transmission is in at least one drive position, and the intermediate drive shaft is operatively disengaged from the driven shaft when the manual transmission is in a neutral position, wherein the manual transmission further includes a shifting mechanism to shift the manual transmission between the at least one drive position and the neutral position.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/395,844Filed 25 Mar 2003 · us provisional application
Priority: 25 Mar 2002
Published: US 2004/0002399 A11 Jan 2004
Granted: 17 Jul 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

F16H 3/385
With synchro-meshing: with braking means
F16H 63/18
The final output mechanisms being successively actuated by progressive movement of the final actuating mechanism: the final actuating mechanism…
F16H 9/18
Using two pulleys, both built-up out of adjustable conical parts: only one flange of each pulley being adjustable
F16H 37/021
Comprising essentially only toothed or friction gearings: toothed gearing combined with continuously variable friction gearing