Four-wheel drive and steering system for dropframe vechicles

Details Four-wheel drive and steering system for dropframe vechicles Four-wheel drive and steering system for dropframe vechicles

1994-02-04

1996-04-09

Focarino, Margaret A.

Motor vehicles

Having four wheels driven

Including separate mechanical assemblies for transmitting...

180371, 180376, 180 2411, B60K 17354

Patent

active

055052789

ABSTRACT:
A four wheel drive and steering system for a motor vehicle includes a splitter gear assembly coupled to the transmission for splitting rotational power between the front wheels and one set of wheels of a tandem rear wheel vehicle. A first drive train rotationally couples the front wheels to the transmission, while a second drive train drives the one set of rear wheels. The second drive train includes a pair of shaft assemblies, each corresponding to a respective rear wheel. Each of the pair of shaft assemblies includes a rear shaft extending substantially parallel to the longitudinal axis of the vehicle adjacent a vertical plane including the corresponding rear wheels, thereby providing clearance for the floor of a dropframe cargo compartment. A transfer gear assembly couples the corresponding rear wheel to the rear shaft of the shaft assembly. The steering system is coupled between the steering linkage for the front wheels and the other set of tandem rear wheels. The steering system includes an actuator connected to the front steering linkage that provides a hydraulic signal to a power cylinder between the rear wheels. A rear wheel linkage connects the power cylinder to the rear wheels to turn the rear wheels in proportion to the degree of turn of the front wheels.

REFERENCES:
patent: 2024148 (1935-12-01), Dahl
patent: 2212453 (1944-08-01), Perkins
patent: 2607431 (1952-08-01), Buckendale
patent: 4039037 (1977-08-01), Vin
patent: 4934733 (1990-06-01), Smith et al.

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