Crank gear with adjustable crank radius for motor driven working

Details Crank gear with adjustable crank radius for motor driven working Crank gear with adjustable crank radius for motor driven working

1979-01-02

1981-10-13

Dorner, Kenneth

Machine element or mechanism

Elements

Cranks and wrist pins

F16C 304

Patent

active

042941369

ABSTRACT:
A crank gear with adjustable crank radius for motor driven beating working implements, especially tamping implements, jack hammers, hammer drills and the like, in which the crank pin for the connecting rod is eccentrically arranged with regard to the crank shaft axis and when being adjusted moves in a circular path which is substantially parallel to its plane of circulation and is eccentric with regard to the crank shaft axis. That end of the crank shaft which faces the connecting rod is a crank disc. The crank pin is eccentrically arranged on a clamping or coupling disc which with regard to the crank shaft axis eccentrically engages that end face of the crank disc which faces toward the crank pin. The clamping disc, when in disengaging position, is rotatable from the outside of the crank gear relative to the crank disc and is adapted in a selected operative position to be arrested relative to the crank disc, by means of a tension force pressing the clamping disc against the crank disc.

REFERENCES:
patent: 421297 (1890-02-01), Mills
patent: 1565820 (1925-12-01), Saunders

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