High-torque gear assembly for personal mobility apparatus
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0346025
(2006-02-02)
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등록번호 |
US-7431110
(2008-10-07)
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발명자
/ 주소 |
- Greenwood,Peter J.
- Aliano,Benedict J.
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출원인 / 주소 |
- Hartford Technologies, Inc.
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대리인 / 주소 |
St. Onge Stewart Johnston & Reens LLC
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인용정보 |
피인용 횟수 :
3 인용 특허 :
6 |
초록
▼
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 an
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.
대표청구항
▼
What is claimed is: 1. 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, wherei
What is claimed is: 1. 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, and wherein said worm wheel and said worm have a gear ratio between 10.25:1 and 10.3:1; a shaft driven by said worm wheel; and a drive wheel driven by said shaft. 2. The personal mobility apparatus of claim 1, wherein said shaft is a first shaft, further comprising: a second shaft coupled to said drive wheel; and a gear train coupled to said first and second shafts, wherein said gear train translates rotational motion of said first shaft into rotational motion of said second shaft to drive said drive wheel. 3. The personal mobility apparatus of claim 2, further comprising a release lever for separating at least one gear from at least one other gear. 4. The personal mobility apparatus of claim 1, wherein said motor is a DC brush motor. 5. The personal mobility apparatus of claim 1, further comprising: an electric brake for braking said driving wheel; and a release lever for mechanically releasing said brake. 6. The personal mobility apparatus of claim 1, wherein said worm is a multistart worm. 7. The personal mobility apparatus of claim 1 wherein said worm has a lead angle between about twenty and about thirty degrees. 8. 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; wherein said worm wheel is a globoid; and wherein said worm wheel and said worm have a gear ratio between 10.25:1 and 10.3:1. 9. The gear assembly of claim 8, further comprising a release lever protruding from said housing. 10. The gear assembly of claim 9, wherein said lever separates at least one gear from at least one other gear. 11. The personal mobility apparatus of claim 8, wherein said worm is a multistart worm. 12. The personal mobility apparatus of claim 8, wherein said worm has a lead angle between about twenty and about thirty degrees. 13. 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; wherein said worm wheel is a globoid gear; and wherein said worm wheel and said worm have a gear ratio between 10.25:1 and 10.3:1. 14. The gear assembly of claim 13, wherein said shaft is a first shaft, further comprising: a second shaft adapted to be coupled to a drive wheel; and a gear train coupled to said first and second shafts, wherein said gear train translates rotational motion of said first shaft into rotational motion of said second shaft to drive said drive wheel. 15. The gear assembly of claim 14, further comprising a release lever coupled to said gear set for separating at least one gear from at least one other gear. 16. The personal mobility apparatus of claim 13, wherein said worm is a multistart worm.
이 특허에 인용된 특허 (6)
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Boshears, Rick L., Cat's toy.
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Popov Valentin Alexeevich (ULITSA Tsjurupy ; 6 ; korpus 4 ; kv. 57 Moscow SU), Globoid worm gearing and method of making globoid worm thereof.
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Arthur J. Milano, Jr., Power assembly.
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Prior Ronald E. (4915 Industrial Way Coeur d\Alene ID 83814), Power wheelchair with transmission using multiple motors per drive wheel.
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Shian-Pei Chang TW, Scooter.
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Swisher Maurice E., Worm gear assembly for a medical mobility apparatus permitting manual reverse mobility.
이 특허를 인용한 특허 (3)
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Mirzaie, Mehdi, Electric mid-wheel drive wheelchair.
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Mirzaie, Mehdi, Electric mid-wheel drive wheelchair.
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Zhou, Daniel Z.; Jackson, Mark A.; Tarter, John J.; Greig, Mark E.; Stevens, Rex W.; Koerlin, James M.; Traxinger, Samuel D.; Killebrew, Allen B., Midwheel drive wheelchair with independent front and rear suspension.
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