▎ 摘　　要

NOVELTY - Oil-free self-lubricating bearing, has shaft core (1) and shaft sleeve (2), outer side of shaft core (1) is connected with inner side of shaft sleeve (2), shaft core (1) comprises first end surface (8), inner column (5) and second end surface (3), first end surface (8) and inner column (5) are integrally formed, one end of inner column (5) is fixedly connected to inner side of second end surface (3), cross-section of shaft sleeve (2) vertical to first end surface (8) is convex, and it is two convex shapes symmetrical along axial line of the inner column (5). USE - Oil-free self-lubricating bearing. ADVANTAGE - The service life of the bearing is greatly prolonged, bearing can not rust in the severe working environment, bearing cannot be stuck due to rust, the production process of the bearing is simplified, number of parts is reduced, the cost is saved, and efficiency is increased. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the followings 1.The shaft sleeve comprises 90-110 pts. wt.ofpolycarbonate,80-120 pts. wt.of copolymerized formaldehyde resin, 20-40 pts. wt.of graphene powder, 5-10 pts. wt.of active agent,2-3 pts. wt.of antifoaming agent, 2-35 pts. wt.of parts, flame retardant. The shaft core comprises 44-56 pts. wt.of iron powder,6-8 pts. wt.of aluminium powder,10-14 pts. wt.of silicon powder,6-10 pts. wt.of graphite,5-8 hard acid zinc, 1-2 pts. wt.of sulfur powder, 1-2 pts. wt.of cadmium powder 2. manufacturing technique of oil-free self-lubricating bearing, involves (S1) weighing raw material of shaft sleeve (2) according to parts by weight, drying polycarbonate and copolymerization formaldehyde resin, drying temperature is 120 degreesC, drying time is more than 5h (S2)raw materials of all shaft sleeve (2) are mixed and stirred uniformly by a stirrer, processing melting temperature is 270-320 degrees Celsius, melting volume flow is 8.0cm3/10min, injecting into circular ring by injection molding machine, mold temperature is 80-80 degrees Celsius, namely injecting into shaft sleeve, (S3) uniformly mixing raw materials of shaft core (1), according to the inner circle size of shaft sleeve, pressing raw material of the shaft core (1) into blank and sintering respectively first end surface (8) and inner column (5) and second end surface (3) integrally formed(S4) integrally processing the surface of the shaft core (1), surface roughness reaches 10 level standard of China GB1031-68 standard. (S5) Inner surface of shaft sleeve (2) is integrally processed, surface roughness reaches the 10 level standard of China GB1031-68 standard, surface friction coefficient of shaft sleeve (2) and shaft core (1) is 0.05-0.1, surface friction coefficient of the shaft sleeve (2) and second end surface (3) is 0.05-0.1, (S6) sleeving shaft sleeve (2) outside inner column (5), using spinning riveting machine and spinning riveting mold, ensuring second end surface (3) and inner column (5) are riveted and fastened, gap control precisely meets requirement, to obtain oil free self-lubricating bearing. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the oilless self-lubricating bearing. Shaft sleeve (2) Second end face (3) First chamfer (4) Inner column (5) Second chamfer (6) First gap cavity (7) First end face (8) Second gap cavity (9)