Continuously variable torque transmission with torsion bars and

Details Continuously variable torque transmission with torsion bars and Continuously variable torque transmission with torsion bars and

1995-09-22

1998-06-30

Bonck, Rodney H.

Machine element or mechanism

Mechanical movements

Rotary to intermittent unidirectional motion

74119, 741255, 74123, F16H 2900

Patent

active

057717435

ABSTRACT:
A mechanical continuously variable torque transmission, in particular for flywheel driven, fuel efficient, low emission cars, trucks and locomotives includes structure as follows: three eccentrics 20, 21, 22, mounted on input shaft 18 and carrying needle bearings 23, 24, 25, rotate freely inside three loops of flexible bands 57, 58, 59. One end of each flexible bands is mounted on an oscillating member 36, 37 or 38, which contain overrunning clutches, able to drive output shaft 30. The oscillating members 36, 37, 38 are each held in a home position by a spring 63 and stop 60, 42. The other ends of the flexible bands are each mounted on a pulley 49, 50, or 51, which are themselves mounted on torsion bars 71, 72, 73. The torsion bars are adjustable in angular position as well as in their elastic length.
Rotation of pulleys 49, 50, 51 tightens the flexible bands so that rotation of the eccentrics causes torque to the oscillating members and pulleys in the first half of a cycle of rotation of each eccentric. The level of torque is adjustable by changing the elastic length of the torsion bars. The torques exerted on the oscillating members 36 are transmitted through overrunning clutches 39 to the output shaft 30. In a second half of a cycle of rotation of each eccentric, the energy stored in the torsion bars flows back to the input shaft 18.

REFERENCES:
patent: 3340743 (1967-09-01), Stageberg
patent: 4091684 (1978-05-01), Lehmann
patent: 4112778 (1978-09-01), Korosue
patent: 4242050 (1980-12-01), Oakes

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