Manpower-assisting power apparatus

Details Manpower-assisting power apparatus Manpower-assisting power apparatus

1998-07-16

2000-10-03

Underwood, Donald W.

Motor vehicles

Special wheel base

Rider propulsion with additional source of power, e.g.,...

280212, B62K 1100

Patent

active

061259594

ABSTRACT:
A manpower-assisting power apparatus for appropriately applying power to assist human power without using a large, high cost torque detection apparatus, and enabling operation by human power to be continued even when external motor-generated power is no longer applied. This manpower-assisting power apparatus is equipped with a differential gear mechanism preferably comprising a pedal drive bevel gear, a motor drive bevel gear, and a pair of corresponding small bevel gears driving a rotary output member. The rotational speeds of the motor drive spur gear integrated with motor drive bevel gear, and pedal drive sprocket integrated with pedal drive bevel gear are respectively detected by a motor speed sensor and at least one manpower rotational speed sensors operating in a noncontact fashion. These detected rotational speeds are used by a controller to preferably drive the motor to maintain a constant ratio between these rotational speeds. Also, this power apparatus may employ a planetary gear system to minimize mechanical loss when transferring power from the motor-manpower combination to the output member driving a wheel.

REFERENCES:
patent: 4364448 (1982-12-01), Ikuma
patent: 5024286 (1991-06-01), Lean et al.
patent: 5370200 (1994-12-01), Takata
patent: 5474148 (1995-12-01), Takata

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