US Patent 10226392 Electric wheelchair frame

An electric wheelchair frame includes a frame and a power support swayably connected to a frame. A connecting rod is swayably connected to the frame, is pivotably connected to the power support, and is movable relative to the power support in a longitudinal direction. A driving device includes a connecting seat and a power output unit. The connecting seat is pivotably mounted to the power support. The power output unit is fixed to the connecting seat and includes a driving shaft extending away from the frame and a driving wheel. When the driving wheel is moving on a bumpy road, the pivotal movement between the connecting seat and the power support increases the sitting comfort of a user in an electric wheelchair.