Torque structure of middle motor type electric power-assisted refitted vehicle

The torque structure comprises a five-way shaft tube, a middle shaft, a torque assembly, a magnetic ring clutch, a middle motor and an output gear mechanism, the middle motor is fixedly arranged in parallel with the five-way shaft tube, the middle shaft penetrates through the five-way shaft tube, the torque assembly is arranged between the middle shaft and the inner wall of the five-way shaft tube, and the magnetic ring clutch is arranged on the middle shaft. One side of the middle shaft is sleeved with a magnetic ring clutch, an output gear mechanism in the middle motor is in one-way meshing connection with the magnetic ring clutch, and the middle motor drives the middle shaft to rotate through the output gear mechanism and the magnetic ring clutch; the torque assembly comprises a deformation sleeve and a torque sensing support, the deformation sleeve is attached to the outer side of the center shaft, the torque sensing support is attached to the inner wall of the five-way shaft tube, the deformation sleeve