Prevent electric bicycle motor magnets off method

Since the motor working environment is very bad, in rainy weather and humidity greater riding inevitably there will be rain water or moisture into the stator core scaffold is a ferrous material, easy to rust, rust generated in the stator magnet and iron expansion between the core support, expanding the magnet, resin adhesive will lose its proper role, relying on magnetically adsorbed on the stator core magnet stand, then there is the magnetic force of the impact of bumps and rotor effects, magnet It will shift, ranging from motor performance decline, while motor sweep chamber, the motor must be repaired.
Using screws. Drill two holes in the magnet, three wheel electric tricycle and drill two holes and tapped at the corresponding position of the stator core bracket, screws with countersunk head fixed on each piece of magnet stator core bracket, so it does not appear magnet shedding problem, since the magnet more than two holes affect the magnetic flux density of the stator, the stator magnetic field not the original strong.
With dovetail fixed. Stator core scaffold is cast from a mold, change in the production process as long as the mold, leaving dovetail groove in the stator core bracket, and then after mechanical processing, so the size of dovetail meet the design requirements and the complete stator concentrically. Then the magnet production costs dovetail, as long as the magnet assembly when axially into the slot, to solve the issue through fixed magnet mechanical tight fit.
This method simply by improving the mold, it is easy to cast magnet assembly, eliminating the hassle resin adhesive with a magnet, will not increase the cost of production, the magnet will never come off or loose. Because the bumps and the electromagnetic force of the magnet is radial and tangential directions are two dovetail fixed, movable axially in magnet no external force, unless human force. When the magnet for magnetic weaken need to be replaced, as long as the axial afterburner magnets can be easily removed, can be easily magnetized to the magnet or replacement.