Front suspension system for an electric wheelchair
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61G-005/06
B60G-003/14
B60G-011/15
A61G-005/04
B60G-015/06
A61G-005/10
출원번호
US-0484968
(2014-09-12)
등록번호
US-9351888
(2016-05-31)
발명자
/ 주소
Wu, Donald P. H.
출원인 / 주소
Energy Control Limited
대리인 / 주소
Wang Law Firm, Inc.
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
A front suspension system for an electric wheelchair is disposed between the frame of the electric wheelchair and each of the front wheels, and has two ends pivoted to the front pivot shaft and a corresponding one of the front wheels, respectively. An elasticity resistance member is sleeved onto the
A front suspension system for an electric wheelchair is disposed between the frame of the electric wheelchair and each of the front wheels, and has two ends pivoted to the front pivot shaft and a corresponding one of the front wheels, respectively. An elasticity resistance member is sleeved onto the front pivot shaft and has two ends connected to the front wheel retainer and the abutting member of the frame, respectively. When the front wheels encounters bumpy road and makes the front wheel retainer pivot, the elasticity resistance member will be compressed to produce a reaction force toward the front wheel retainer and the abutting member of the frame, respectively, so that the front wheel retainer is pressed down to keep pressing against the flat bearing surface, and the frame is also pressed downward to prevent tipping backward.
대표청구항▼
1. A front suspension system for an electric wheelchair being assembled onto a frame of the electric wheelchair, the electric wheelchair including a seating disposed on the frame, two front wheels and two rear wheels disposed at a front end and a rear end of the frame, respectively, an assembly fram
1. A front suspension system for an electric wheelchair being assembled onto a frame of the electric wheelchair, the electric wheelchair including a seating disposed on the frame, two front wheels and two rear wheels disposed at a front end and a rear end of the frame, respectively, an assembly frame connected to each of two sides of the frame between the front and rear ends of the frame via a pivot, a drive unit being fixed to each of the assembling frames and located at one side of the corresponding pivot, and a drive wheel coupled to each of the drive units, each of the front wheels being connected to the frame via a front suspension system, the front suspension system comprising a front pivot shaft with one end fixed to the frame, and a front wheel retainer with one end pivoted to another end of the front pivot shaft, the front wheel retainer having another end fixed to a corresponding one of the front wheels, the front suspension system being characterized in that: an abutting member is on the frame;a surface of the front wheel retainer faces toward the frame and is formed with a driving portion;an elasticity resistance member is disposed between the frame and the front wheels retainer, the elasticity resistance member is sequentially formed with a driving section, an elasticity resistance section and a stop section, the elasticity resistance section is a spiral structure, and the driving section and the stop section are connected to two ends of the elasticity resistance section, respectively, and extend in two different directions, the elasticity resistance member is sleeved onto the front pivot shaft and located between the frame and the front wheel retainer, the driving section of the elasticity resistance member is connected to the driving portion of the front wheel retainer, and the stop section is stopped against the abutting member, the stop section includes an extending portion and a force applying portion, a direction along which the extending portion extends is defined as a first direction, and a direction perpendicular to the first direction is defined as a second direction, the force applying force extends in the second direction, and the force applying portion of the stop section is stopped against the abutting member; anda front shock absorber has one end pivoted to the front wheel retainer, and has another end pivoted to another side of the pivot of the assembling frame, an axis of the front shock absorber is located at angle ranging from 0-10 degrees with respect to the first direction. 2. The front suspension system for the electric wheelchair as claimed in claim 1, wherein the angle is 4-6 degrees. 3. The front suspension system for the electric wheelchair as claimed in claim 1, wherein the driving portion is formed with a through hole in which is inserted the driving section. 4. The front suspension system for the electric wheelchair as claimed in claim 1, wherein a position of the front pivot shaft on the frame in a first direction is lower than a position of the abutting member on the frame in the first direction.
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이 특허에 인용된 특허 (4)
Mills, Christopher James, Suspension assembly for wheeled conveyance.
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