| 摘要 |
A front suspension system for an electric wheelchair includes front pivot shaft, a front wheel retainer, an elasticity resistance member, and a front shock absorber. The front shock absorber is disposed on a horizontal first section of the front wheel retainer so as to improve climbing capability of the wheelchair. The elasticity resistance member is disposed between the frame and the front wheel retainer 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. |
| 主权项 |
1. A front suspension system for an electric wheelchair, being assembled onto a frame of the electric wheelchair and provided for mounting of two front wheels which are disposed at one end of the frame, at another end of the frame being provided two rear wheels, to each of two sides between the two ends of the frame being pivotally fixed one end of an assembling frame via a pivot, the front suspension system comprising a front pivot shaft, a front wheel retainer, an elasticity resistance member, and a front shock absorber, wherein the front pivot shaft has one end fixed to the frame, and the front wheel retainer has two ends fixed to the front pivot shaft and the front wheels, respectively, the front suspension system being characterized in that:
an abutting member is on the frame; a surface of the front wheel retainer facing the frame is formed with a driving portion, the front wheel retainer includes a first section, a second section, and a third section which are connected sequentially with one another, an extending direction of the first section is defined as a second direction which is perpendicular to a first direction, an extending direction of the second section defines an angle with respect to the first and second direction, respectively; the elasticity resistance member is disposed between the frame and the front wheels retainer and is sequentially provided 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, 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; and the front shock absorber has one end pivoted to the first section of the front wheel retainer, and has another end pivoted to another end 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, and the another end of the front shock absorber fixed to the assembling frame is inclined towards the rear wheels. |
