Stepless transmission

Details Stepless transmission Stepless transmission

1989-09-06

1991-06-25

Braun, Leslie A.

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

74199, F16H 1508

Patent

active

050256726

ABSTRACT:
The invention generally relates to a stepless transmission, and more particularly to an improvement of a cam system equipped to press a friction disc on the output side, wherein the cam system comprises a cam with a cam face which attaches to an output shaft and a sleeve with a driven face which couples with the cam face and is fixed on a friction disc.
One or both of a cam face and a driven face are cut off and formed in smooth curved surfaces such as spiral or wavy surfaces through a laser process. By adopting a laser process, precision of coupling the cam face with the driven face is easily improved, and a friction disc and a rotary disc can be mutually pressed with a minimum compressing pressure in accordance with transmission torque.
A pair of pieces is obtained by cutting a single tubular stock by means of a laser process, one of the so cut pieces is used for a cam and the other for a sleeve.

REFERENCES:
patent: 3181381 (1965-05-01), Jorgensen
patent: 3765257 (1973-10-01), Ogino
patent: 4557155 (1985-12-01), Kopatz
patent: 4782208 (1988-11-01), Withrow et al.

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