Range shift arrangement for four-wheel drive vehicles

Details Range shift arrangement for four-wheel drive vehicles Range shift arrangement for four-wheel drive vehicles

1992-08-19

1994-09-13

Braun, Leslie A.

Planetary gear transmission systems or components

Differential planetary gearing

Including means to selectively apply rotational power to...

475269, 475270, 192 53F, F16H 3706

Patent

active

053464427

ABSTRACT:
A synchronized shift arrangement is disclosed for shifting a planetary-type gear reduction assembly from a low-range operating mode to a high-range operating mode. This arrangement is particularly adapted for use in vehicular power transfer devices, such as four-wheel drive transfer cases, for allowing the vehicle operator to shift "on-the-fly" from a four-wheel low-range drive mode to a four-wheel high-range drive mode without the need of stopping the motor vehicle. In a preferred embodiment, the power transfer apparatus includes a housing, a first member supported for rotation in the housing, a second member supported in the housing for rotation relative to the first member, a planetary gear assembly coupled to the first member for rotatably driving an output member thereof at a reduced ratio relative to the first member, and a clutch sleeve supported for rotation with the second member and which is movable between a first position for coupling the second member to the output member of the planetary gear assembly for rotatably driving the second member at the reduced ratio, and a second position for coupling the second member for rotation with the first member. The power transfer apparatus further includes a synchronizer for causing speed synchronization between the first and second members in response to movement of the clutch sleeve from the first position to said second position.

REFERENCES:
patent: 4344335 (1982-08-01), Kawai
patent: 4440042 (1984-04-01), Holdeman
patent: 4625584 (1986-12-01), Onodera
patent: 4677875 (1987-07-01), Batchelor
patent: 4727968 (1988-03-01), Chana
patent: 4770280 (1988-09-01), Frost
patent: 5054335 (1991-10-01), Andrews
patent: 5057062 (1991-10-01), Yamasaki et al.
patent: 5076112 (1991-12-01), Williams

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