Transmission structure

According to the technical scheme, the transmission structure is characterized in that the transmission structure comprises a motor shaft, a shaft sleeve is installed outside the motor shaft, the end of the shaft sleeve is connected with an output shaft through a coupler, shaft keys are installed between the motor shaft and the coupler and between the output shaft and the coupler respectively, a bell jar is installed outside the motor shaft, and the bell jar is connected with the shaft sleeve. The motor shaft, the coupler and the output shaft are located in the bell jar, the output shaft is rotationally connected into the bell jar through two bearings, and a ring is arranged between the end face, close to the motor shaft, of the bearing and the bell jar. A first adjusting gasket, a second adjusting gasket, a third adjusting gasket and a fourth adjusting gasket are arranged between the end face, away from the motor shaft, of the bearing and the bell jar. The transmission structure has a good function of protec