Automatic speed-change apparatus for a gear transmission

Details Automatic speed-change apparatus for a gear transmission Automatic speed-change apparatus for a gear transmission

1997-11-17

1999-05-11

Marmor, Charles A.

Machine element or mechanism

Gearing

Interchangeably locked

7447312, 74 8915, F16H59/00

Patent

active

059016086

ABSTRACT:
The object is to provide a speed-change apparatus wherein the automatic speed change of the conventional gear transmission can be satisfactorily performed by controlling a single motor and a single electromagnetic clutch. This apparatus includes a motor, an actuator gear, a select shaft having a select gear engaging with said actuator gear, a clutch, and a sleeve for moving in the axial direction; a shift gear engaging with said actuator gear, and a slider connected with said shift gear and connected with said sleeve through a slider bearing and further having a female screw engaging with a male screw on said select shaft. Said gears from said motor gear through said select gear have the gear ratios set identical to the gear ratios of said gears from said motor gear through said shift gear so that at the select operation, when said clutch is connected and said select shaft rotates, said slider may rotate without the axial movement; and at the shift operation, when said clutch is cut, said female screw may travel forward and reversely against said male screw, and said slider may move in the axial direction.

REFERENCES:
patent: 4745822 (1988-05-01), Trachman et al.
patent: 4790204 (1988-12-01), Tury et al.
patent: 5473959 (1995-12-01), Lasoen
patent: 5689997 (1997-11-01), Schaller
patent: 5704251 (1998-01-01), Alber et al.
patent: 5749264 (1998-05-01), Broadbent

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