High-torque gear assembly for personal mobility apparatus
AssigneeHartford Technologies, Inc.
InventorsPeter Greenwood, Benedict Aliano
Life of this patent
Estimating the term…
Abstract
A high-torque gear assembly for a personal mobility apparatus is disclosed generally comprising a shaft that drives a drive wheel of the personal mobility apparatus, a worm driven by a motor, and a worm wheel coupled to the shaft and driven by the worm, where both the worm wheel is a globoid gear and the worm is a globoid worm. In some embodiments, a gear train is coupled between a gear shaft and a drive wheel shaft for translating the rotational motion. In certain embodiments, the worm wheel and the worm have a gear ratio of at least 10:1, and the worm has a lead angle between twenty and thirty degrees.
Claims21
A personal mobility apparatus with a high-torque gear assembly, comprising:
- a frame for supporting a rider;
- an electric motor mounted to said frame;
- a controller electrically connected to said motor with which the rider controls said motor;
- a worm driven by said motor, wherein said worm is a globoid worm;
- a worm wheel driven by said worm, wherein said worm wheel is a globoid gear;
- a shaft driven by said worm wheel;
- and
- a drive wheel driven by said shaft.
A high-torque gear assembly for a personal mobility apparatus, comprising:
- a housing, said housing having a first opening for accommodating at least part of a motor, and a second opening for accommodating at least part of a wheel drive shaft of the personal mobility apparatus;
- a worm disposed in said housing, said worm having a rotational axis about which said worm rotates when driven by the motor;
- a worm wheel disposed in said housing and driven by said worm;
- a gear shaft disposed in said housing and extending out from said worm wheel such that said gear shaft rotates with said worm wheel when driven by said worm;
- and
- a gear train disposed in said housing for transmitting the rotational motion of said gear shaft to the wheel drive shaft of the personal mobility apparatus;
- wherein said worm is a globoid worm;
- and
- wherein said worm wheel is a globoid gear.
A high-torque gear assembly for a personal mobility apparatus, comprising:
- a shaft adapted to drive a drive wheel of the personal mobility apparatus;
- a worm adapted to be driven by a motor of the personal mobility apparatus;
- and
- a worm wheel coupled to said shaft and driven by said worm;
- wherein said worm is a globoid worm;
- and
- wherein said worm wheel is a globoid gear.
Dependencies are inferred from the claim text.