Wheel reaction force detection device and system and aerial work platform

The invention relates to a wheel bearing reaction detection device and system and an aerial work platform, at least two wheels are provided with the wheel bearing reaction detection device, the wheel bearing reaction detection device comprises a bogie, the bogie is arranged on a speed reducer connected with the wheels and comprises a supporting top plate, a side plate and a wheel carrier shaft, the speed reducer penetrates through the side plates and is connected with the wheels, the bottom end of the wheel carrier shaft is installed on the supporting top plate, and the top end of the wheel carrier shaft extends upwards; the shaft sleeve is fixedly connected with the chassis and extends downwards, and the wheel carrier shaft is sleeved with the shaft sleeve and rotates coaxially with the shaft sleeve; the first detection piece is arranged in the axis direction of the wheel carrier shaft and is used for measuring a first supporting force in the axial direction of the wheel carrier shaft; and the second detecti