The invention relates to a two-stage walking speed
reducer with a
brake shaft. One end of a primary
planet carrier in a speed
reducer is connected with a secondary gear ring and a rear end cover, andthe other end of the primary
planet carrier is connected with an input
flange; one end of a secondary sun wheel is arranged on an input shaft, and the other end of the secondary sun wheel is arrangedon a
brake shaft, the input shaft, the secondary sun gear and the
brake shaft are coaxially arranged; a primary sun wheel is arranged on the secondary planetary carrier, the primary planetary gear andthe primary sun gear are in external meshing
gear transmission, a secondary planetary gear and the secondary sun gear are in external meshing
gear transmission, the primary planetary gear and the secondary planetary gear are connected with a primary gear ring and the secondary gear ring respectively, and the secondary gear ring is in transmission with an inner-meshing gear; and a secondary
gear transmission part is a planetary
gear train, and a primary gear transmission part is a fixed-shaft
gear train. The input shaft of the speed
reducer is input, the primary gear ring and the brake shaft are simultaneously output, and the brake shaft and the input shaft rotate in the same direction at the same speed. The speed reducer is compact in structure, short in axial size, small in size, large in
transmission ratio, large in output torque and high in radial
bearing capacity, and is most suitable for a
steering wheel system of an AGV trolley.