Continuously variable speed transmission

Details Continuously variable speed transmission Continuously variable speed transmission

1989-12-18

1991-10-15

Diehl, Dwight

Planetary gear transmission systems or components

Nonplanetary variable speed or direction transmission...

Nonplanetary transmission is belt or chain gearing

F16H 3708, F16H 4706

Patent

active

050570617

ABSTRACT:
A continuously variable speed transmission having a belt drive continuously variable speed transmission in which a belt is wrapped around primary and secondary pulleys each supported on a shaft and each consisting of a pair of sheaves capable of relatively moving axially, and a forward/reverse rotation changeover mechanism. The belt drive continuously variable speed transmission is provided with a pressure adjusting cam mechanism for applying an axial force corresponding to a transmitted torque to at least one of the pulleys, ball screw mechanisms for axially moving the movable sheaves of the pulleys. A fluid torque converter is disposed on the transmission upstream side of the primary pulley. In the belt drive continuously variable speed transmission, the pressure adjusting cam mechanism produces and axial force corresponding to the transmitted torque to clamp the belt, and the power is transmitted by the effect of this clamping force without belt slip. If at the time of vehicle starting the torque of the fluid torque converter is increased, the pressure adjusting cam mechanism produces a larger axial force corresponding to the increased torque, thereby clamping the belt by a larger force to prevent the belt from slipping during transmission of power. This large belt clamping force is produced for only a short time for vehicle starting. As the torque of the fluid torque converter is reduced to a coupling range, the axial force produced by the pressure adjusting cam mechanism is correspondingly reduced automatically. The belt is clamped by a reduced axial force for a greater part of the operating time.

REFERENCES:
patent: 3235045 (1966-02-01), Pop
patent: 4063623 (1977-12-01), Ivey et al.
patent: 4467670 (1984-08-01), Kawamoto
patent: 4543852 (1985-10-01), Svab et al.
patent: 4549447 (1985-10-01), Sakakibara
patent: 4633736 (1987-01-01), Sakakibara et al.
patent: 4660692 (1987-04-01), Sakakibara et al.
patent: 4673071 (1987-06-01), Moroto et al.
patent: 4733761 (1988-03-01), Sakakibara
patent: 4735598 (1988-04-01), Moroto et al.
patent: 4765200 (1988-08-01), Koshino
patent: 4843908 (1989-07-01), Koshimo
patent: 4895236 (1990-01-01), Sakakibara et al.

Affiliated with

Also associated with

Rating

Continuously variable speed transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Continuously variable speed transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuously variable speed transmission will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-987491