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US 5,341,892 AGranted
Motor and pedal driven bicycle
AssigneeSanyo Electric Co., Ltd.
InventorsYasuo Hirose, Yukifumi Yamaguchi
Life of this patent
Estimating the term…
Abstract
A motor and pedal driven bicycle having a motor driving unit for providing driver power to a wheel in which the motor driving unit includes a disc-like casing having a space formed therein and dividable into two portions, a battery powered wheel driving motor, and a speed reducer coupled to the motor to reduce a revolution speed of the motor. The casing is composed of a fixed portion secured to a hub spindle of the wheel and a rotatable portion provided on a hub shell mounted on the hub spindle to be rotatable along with the hub shell. Either the motor or both the motor and the speed reducer are provided on the inside of the fixed portion of the casing.
Claims17
A motor and pedal driven bicycle, comprising:
- a motor driving unit for imparting driving power to a wheel;
- said driving unit including a disc-like casing having a space formed therein and dividable into two portions;
- said driving unit further including a battery powered wheel driving motor;
- a speed reducer coupled to said battery powered wheel driving motor, said speed reducer including means for reducing a revolution speed of said battery powered wheel driving motor;
- said disc-like casing including a fixed portion and a rotatable portion;
- said fixed portion being secured to a hub spindle of said wheel;
- said rotatable portion being disposed on a hub shell, said hub shell being rotatably mounted on said hub spindle, whereby said rotatable portion is rotatable about said hub spindle along with said hub shell;
- at least one of said battery powered wheel driving motor and said speed reducer is provided on an inside of said fixed portion of said disc-like casing;
- and
- said battery powered wheel driving motor and at least a part of said speed reducer are both provided at a location lower than said hub spindle.
7 more elements
A motor and pedal driven bicycle, comprising:
- a motor driving unit for imparting driving power to a wheel;
- said driving unit including a disc-like casing having a space formed therein and dividable into two portions;
- said driving unit further including a battery powered wheel driving motor;
- a speed reducer coupled to said battery powered wheel driving motor, said speed reducer including means for reducing a revolution speed of said battery powered wheel driving motor;
- said disc-like casing including a fixed portion and a rotatable portion;
- said fixed portion being secured to a hub spindle of said wheel;
- said rotatable portion being disposed on a hub shell, said hub shell being rotatably mounted on said hub spindle, whereby said rotatable portion is rotatable about said hub spindle along with said hub shell;
- at least one of said battery powered wheel driving motor and said speed reducer is provided on an inside of said fixed portion of said disc-like casing;
- and
- a pedal rotatably supported on a first end of a crank;
- a chain sprocket coaxially provided on a crank spindle at a second end of said crank;
- and
- a chain ring with teeth mounted on the hub shell and coupled to said chain sprocket through a chin for transmitting a driving force generated by a revolution of said pedal to said hub shell through said crank, said chain sprocket and said chain when desired.
10 more elements
A motor and pedal driven bicycle, comprising:
- a motor driving unit for imparting driving power to a wheel;
- said driving unit including a disc-like casing having a space formed therein and dividable into two portions;
- said driving unit further including a battery powered wheel driving motor;
- a speed reducer coupled to said battery powered wheel driving motor, said speed reducer including means for reducing a revolution speed of said battery powered wheel driving motor;
- said disc-like casing including a fixed portion and a rotatable portion;
- said fixed portion being secured to a hub spindle of said wheel;
- said rotatable portion being disposed on a hub shell, said hub shell being rotatably mounted on said hub spindle, whereby said rotatable portion is rotatable about said hub spindle along with said hub shell;
- at least one of said battery powered wheel driving motor and said speed reducer is provided on an inside of said fixed portion of said disc-like casing;
- and
- a control unit including a control substrate and at least one control circuit component being provided on said fixed portion of said disc-like casing.
7 more elements
A motor and pedal driven bicycle, comprising:
- a motor driving unit for imparting driving power to a wheel;
- said driving unit including a disc-like casing having a space formed therein and dividable into a fixed portion and a rotatable portion;
- said driving unit further including a battery powered wheel driving motor;
- a speed reducer coupled to said battery powered wheel driving motor, said speed reducer including means for reducing a revolution speed of said battery powered wheel driving motor;
- said fixed portion being secured to a hub spindle of said wheel;
- at least one of said battery powered wheel driving motor and said speed reducer is provided on an inside of said fixed portion of said disc-like casing;
- a rotational element of said speed reducer is coaxially disposed on said hub shell, said hub shell being rotatably mounted on said hub spindle;
- and
- said rotatable portion being removably fastened to said hub shell whereby said rotatable portion is rotatable about said hub spindle along with said hub shell and removal of said rotatable portion allows access to said motor and said reducer without requiring partial disassembly thereof.
6 more elements
Dependencies are inferred from the claim text.