Variable speed geared motor and a series thereof

Details Variable speed geared motor and a series thereof Variable speed geared motor and a series thereof

1992-05-19

1993-08-31

Herrmann, Allan D.

Machine element or mechanism

Gearing

Directly cooperating gears

310 83, F16H 112

Patent

active

052398811

ABSTRACT:
In a variable speed geared motor constructed by combining an inverter motor controllable in rotational speed by inverter drive with a gear reducer, the gear reducer is of a two-stage type, and a reduction ratio i of the gear reducer is suppressed so that i.ltoreq.N holds where N stands for a maximum reduction ratio of the inverter motor at which a constant torque characteristic can be ensured. Further, in a series of variable speed geared motors each satisfying the above conditions, a common ratio R of a series of reduction ratios i of the variable speed geared motors is set to 1.2-1.5. For example, the series is set to 2, 3, 4, 5, 6, and 8.
Accordingly, the geared motor can be constructed lightly in weight, compactly, and at low costs, and it can be economically used in a rotational speed region of 200-900 rpm which is an ordinary region in driving of a pump or a high-speed conveyor.

REFERENCES:
patent: 2170548 (1939-08-01), Christian
patent: 2320379 (1943-06-01), Niekamp
patent: 2503027 (1950-04-01), Christian
patent: 3153158 (1964-10-01), Schmitter
patent: 3234808 (1966-02-01), Nelson

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