Backlash reducer for gear transmission system

Machine element or mechanism – Gearing – Backlash take-up

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74440, F16H 5518

Patent

active

047396709

ABSTRACT:
A backlash reducer for a gear transmission system comprises a main gear and an auxiliary gear which form one of a driving gear and a driven gear in mesh therewith of the gear transmission system. The main gear is mounted on a rotary shaft for rotation therewith, and the auxiliary gear is mounted on the rotary shaft for rotation relative thereto. A backlash reducing mechanism is operable in response to a centrifugal force due to rotation of the rotary shaft for angularly moving the main and auxiliary gears relative to each other to reduce a backlash between the driving and driven gears. The backlash reducer may further comprise a mechanism for restraining the backlash reducing action of the backlash reducing mechanism. Alternatively, the backlash reducer may comprise a first mechanism operable in response to the centrifugal force to move the auxiliary gear axially thereof and a second mechanism for converting the axial movement of the auxiliary gear to circumferential movement thereof.

REFERENCES:
patent: 1317232 (1919-09-01), Spillman
patent: 1334517 (1920-03-01), Bryan
patent: 1748820 (1930-02-01), Alexandrescu
patent: 2607238 (1952-08-01), Enghish et al.
patent: 3487706 (1970-01-01), Resener
patent: 3648534 (1972-03-01), Fagarazzi
patent: 4630496 (1986-12-01), Yasuoka
Product Engineering, "18 Ways to Control Backlash in Gearing", pp. 71-75, Oct. 26, 1959.

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