Middle shaft for electric bicycle and machining process of middle shaft

The center shaft for the electric bicycle comprises a center shaft body, the center shaft body is provided with a frame mounting portion, fluted disc fixing portions, prism-shaped structures and frustum structures are arranged on the two sides of the frame mounting portion, each side face of each fr...

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Bibliographische Detailangaben
Hauptverfasser:	MA CHENG, GUAN CHANGYU, MA HESHAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BEARINGS BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS FORGE FURNACES FORGING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HAMMERING HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The center shaft for the electric bicycle comprises a center shaft body, the center shaft body is provided with a frame mounting portion, fluted disc fixing portions, prism-shaped structures and frustum structures are arranged on the two sides of the frame mounting portion, each side face of each frustum structure is a slope-shaped face, a slope angle theta is formed between each slope-shaped face and the center axis of the center shaft body, and the fluted disc fixing portions, the prism-shaped structures and the frustum structures are arranged on the center shaft body. The invention further provides a machining process of the center shaft for the electric bicycle, cutting loss is avoided in the machining process, the material utilization rate is increased, light weight of products is achieved, raw materials are saved, the production cost is reduced, the original phosphorus saponification treatment procedure of the surface polluting the environment is omitted, the machining period is shortened, and the machi