Four-wheel vehicle drive system

Details Four-wheel vehicle drive system Four-wheel vehicle drive system

1986-09-22

1987-07-07

Love, John J.

Motor vehicles

Having four wheels driven

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

74447, 180248, B60K 4126, F16H 338

Patent

active

046780556

ABSTRACT:
A four-wheel drive system for use in a vehicle includes mechanisms for preventing disengagement of the engagement sleeves of a transfer gear shift mechanism while permitting limited displacement of the engagement sleeves, shift forks and fork shafts to prevent a large amount of friction between grooves in the engagement sleeves and engagement fingers of the shift forks. Disengagement of the engagement sleeves is prevented by formation of chamfers and tapered surfaces on corresponding portions of the engagement sleeves, splines and sprockets. Limited displacement of the engagement sleeves, shift forks and fork shafts is accomplished by means of notches in the fork shafts which are larger than corresponding locking pins, so that the fork shafts, shift forks and engagement sleeves are displaceable within a distance corresponding to the difference in size between the notches and locking pins. The above features prevent disengagement of the engagement sleeves without undue friction and consequent sludge buildup, even when a torque is applied through the transfer gear shift mechanism and thrust forces are exerted on the engagement sleeves.

REFERENCES:
patent: 3529487 (1970-09-01), Dolan
patent: 4467665 (1984-08-01), Katayama et al.
patent: 4476953 (1984-10-01), Hiraiwa

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