Actuator for 4-wheel drive vehicle

Details Actuator for 4-wheel drive vehicle Actuator for 4-wheel drive vehicle

1996-07-12

1998-08-04

Hurley, Kevin

Motor vehicles

Having four wheels driven

With manually operated means for disengaging drive to one or...

192 846, F16D 2800

Patent

active

057880085

ABSTRACT:
A system for selecting either 2-wheel or 4-wheel drive in a vehicle which includes an actuator mounted on the differential housing of the vehicle drive system for engaging and disengaging the externally splined ends of opposing shafts in response to a signal switched from a power source in the vehicle cab. The actuator converts the rotary output of a DC motor to linear output of a carrier-mounted lead screw and drive nut which is transferred to a plunger which moves an internally splined ring between the opposing splined shaft ends. The position of the splined ring and the disposition of the drive in either 2-wheel or 4-wheel operation is signalled by a planetary gear system in which one ring gear is fixed and a second switch ring gear is rotatable, the two ring gears having different numbers of teeth whereby a single revolution of the lead screw and its carrier causes less than one revolution of the switch ring gear over the total linear motion of the drive nut and plunger, which is detected and controlled by means of wiping members in electrical contact with conducting strips on the carrier which are in circuit with the power source in the vehicle cab.

REFERENCES:
patent: 5267635 (1993-12-01), Peterson et al.
patent: 5605213 (1997-02-01), White

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