50results about "Rotary transmissions" patented technology

The utility model discloses a power-assisted bicycle damping device which comprises a main bicycle frame and an auxiliary bicycle frame, a driving motor is installed in the main bicycle frame, output shafts are arranged on the two sides of the driving motor, the exteriors of the output shafts are connected through U-shaped clamping grooves, the main bicycle frame is provided with a bicycle frame rotating shaft fixing seat, and the bicycle frame rotating shaft fixing seat is connected with the auxiliary bicycle frame. The auxiliary frame is provided with an auxiliary frame rotating shaft, the frame rotating shaft fixing seat is rotatably connected with the auxiliary frame rotating shaft, the axis of the output shaft is overlapped with the axis of the auxiliary frame rotating shaft, and the output shaft and the auxiliary frame rotating shaft which are concentrically and non-coaxially arranged can ensure that the auxiliary frame rotating shaft is not in contact with the auxiliary frame rotating shaft when a vehicle jolts. The output shaft and the auxiliary frame rotating shaft move in a split mode, synchronous movement between the output shaft and the auxiliary frame rotating shaft is avoided, breakage of the output shaft in the long-term use process is avoided, and therefore the service life of equipment is prolonged.

The application provides a motorcycle reverse gear structure and belongs to the technical field of motorcycles. The motorcycle reverse gear structure solves the low production efficiency problem of the existing motorcycle reverse gear. The motorcycle reverse gear structure is characterized in that the engine of the motorcycle comprises a box body and an output shaft, the reverse gear structure comprises a shell, the shell is internally provided with a shift main shaft coaxial with the output shaft, one end of the shift main shaft is inserted with one end of the output shaft, the shift main shaft and the output shaft are connected through a connecting bolt parallel to the shift main shaft, the box body is provided with a plurality of connecting columns parallel to the shift main shaft, the shell is provided with a plurality of clamping portions corresponding to the connecting columns, the clamping portions are respectively sleeved on the corresponding connecting columns, and the clamping portions are further provided with fasteners capable of tightly clamping or loosening the connecting columns. In the process of connecting the shell and the box body, the position accuracy of the output shaft can be avoided, and the working performance of the engine is ensured.

A foldable two-wheel pedal bicycle. The front and rear beams are connected by a sleeve and a core tube. The front end of the front beam and the rear end of the rear beam are respectively connected to the front and rear wheels through the front and rear steering heads. The left and right pedals are respectively connected to the left and right driving gears in the sleeve and the core tube through the left and right half shafts, and the driving gears can drive the wheels to rotate through the driven gears, transmission shafts, flexible shafts and wheel axles. The left and right direction rods are respectively connected to the left and right ring gears in the sleeve and the core tube through hinge heads, and the ring gears can drive the wheels to turn through the horizontal racks, connecting rods, vertical racks, column gears and steering heads. When the front and rear beams rotate along the sleeve and the core tube, the positioning pins on the sleeve will cooperate with the sliding grooves on the core tube to separate the front and rear beams to the left and right by a certain distance. Therefore, when the front and rear beams are completely folded, the front and rear wheels will completely overlap. The left and right direction rods are folded together with the front and rear beams through the hinge heads, and then the seat is retracted through the lifting rod mechanism.