the power wheelchair with center-wheel drive
A power wheelchair with center drive has five wheels, one of which is a spring-loaded support wheel in the rear. All wheels are in permanent contact with the ground.
The drive wheels are located in the center of the wheelchair, which means that the user sits with the center of gravity of the body and at the same time with the center of rotation of the body above the center of rotation of the wheelchair. This improves both traction and turning characteristics. Since the swivel range is almost evenly distributed between the front and rear of the power wheelchair, the turning circle is the smallest compared to other drive types. This enables problem-free maneuvering in tight spaces. At the same time, easy, intuitive driving with great driving stability is provided, as is safe driving behavior on inclines and declines. On side slopes such as a curb, the front caster wheels pull the chair downward, the rear wheels pull upward, and the chair remains track stable. However, overcoming obstacles can be disadvantageous, as the front wheels usually only have a medium edge climbing ability