Automatic reduction-ratio changing apparatus

Details Automatic reduction-ratio changing apparatus Automatic reduction-ratio changing apparatus

2006-10-10

2006-10-10

Marmor, Charles A. (Department: 3681)

Planetary gear transmission systems or components

Condition responsive control

Overload release

C475S294000, C192S056500, C192S056510, C173S122000, C173S127000, C173S178000, C173S216000, C173S217000

Reexamination Certificate

active

07118507

ABSTRACT:
An automatic reduction-ratio changing apparatus comprises a planetary gear mechanism including a sun gear, planet gears, and an internal gear. When a load, which exceeds a predetermined torque, is applied to the internal gear, a pawl of a lock lever is engaged with a ratchet section of a housing to stop the rotation of the internal gear and lock the internal gear. When a displaceable member of an actuator is displaced from an outward route to a homeward route, the rotation of a motor is reversed, and an input shaft and a cam are rotated in a reverse direction to release from the locked state. Accordingly, the speed reduction ratio, which is transmitted from an output shaft to the actuator, is automatically switched.

REFERENCES:
patent: 3872742 (1975-03-01), States
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patent: 4892013 (1990-01-01), Satoh
patent: 4898249 (1990-02-01), Ohmori
patent: 6076438 (2000-06-01), Rahm
patent: 6431289 (2002-08-01), Potter et al.
patent: 6887176 (2005-05-01), Sasaki
patent: 09-295278 (1997-11-01), None

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