2results about How to "Reduce internal resistance" patented technology

The utility model provides a kind of bicycle hub and bicycle, it is related to bicycle technical field, including axle core and the shell and tower base of being sleeved on axle core, wherein shell and tower base are formed with the installation cavity for assembling ratchet structure between, ratchet structure includes first ratchet piece, second ratchet piece and elastic piece, first ratchet piece and second ratchet piece are all sleeved on axle core, first limiting portion for being limited with first ratchet piece along the circumference is shaped in shell, second limiting portion for being limited with second ratchet piece along the circumference is shaped in tower base, elastic piece is located in the other side of second ratchet piece relative to first ratchet piece, to make first ratchet piece limit along the axial direction, second ratchet piece can reciprocate along the axial direction, so that the second helical tooth on the end face of second ratchet piece and the first helical tooth on the end face of first ratchet piece can be one-way engagement. To improve the problem that existing bicycle hub structure is easy to wear and tear and the number of parts is more.

The invention discloses pneumatic driving type fireproof glue solution vacuum defoaming quantitative filling equipment, and relates to the technical field of fireproof glue solution filling, the pneumatic driving type fireproof glue solution vacuum defoaming quantitative filling equipment comprises a tank body, the top of the tank body is movably connected with a tank cover, the upper portion of the left side of the tank body is fixedly connected with a vacuumizing connector, and the pneumatic driving type fireproof glue solution vacuum defoaming quantitative filling equipment further comprises filling assemblies arranged on the right side and the bottom of the tank body; the filling assembly comprises an air pressure injection connector fixedly connected to the top of the right side of the tank body, a pressure gauge is fixedly connected to the right end of the air pressure injection connector, a filling connector is fixedly connected to the bottom of the tank body, an electromagnetic valve is movably connected to the exterior of the filling connector, and a weighing device is arranged at the bottom of the tank body; bubbles in the fireproof glue solution in the tank body are completely removed in a vacuumizing mode, the weight reduction amount of the tank body is detected through weight induction, the weight reduction amount of the tank body is the weight of the fireproof glue solution injected into the fireproof glass cavity, and the injection amount can be accurately controlled.