41results about How to "No risk of cracking" patented technology

A bearing device for a wheel enabling the easy control of quality since there is no possibility of cracking even if caulking is applied thereto. The bearing device comprises an outer ring (3) having double rows of raceway surfaces on the inner periphery thereof, an inner member having raceway surfaces opposed to the raceway surfaces, and balls (1) interposed between the double rows of raceway surfaces opposed to each other. The inner member further comprises a HUB ring (4) and an inner ring (2). Caulking is applied to the HUB ring (4) to join it to the inner ring (2). The grain size number of the austenite grains of a caulked section (4b) is at least 6.

The invention belongs to the field of motors and particularly discloses a motor magnetic ring, a motor and a washing machine. The motor magnetic ring is composed of a hollow inner hole, a metal bracket fittingly matched with a rotating shaft, and a non-metallic magnetic ring formed on the metal bracket through the injection molding process. The metal bracket comprises a substrate, a sleeve convexly arranged at the middle part of the substrate, and an annular convex edge convexly arranged at the outer edge of the substrate. The hollow inner hole penetrates through the sleeve and the substrate. The non-metallic magnetic ring is formed on the annular convex edge and the substrate through the injection molding process. According to the technical scheme of the invention, the non-metallic magnetic ring and the rotating shaft do not directly match each other. Meanwhile, the non-metallic magnetic ring is formed on the annular convex edge and the substrate through the injection molding process. In this way, when the motor magnetic ring is to be installed onto the rotating shaft, no outwardly expanding stress is applied onto the non-metallic magnetic ring. Therefore, the non-metallic magnetic ring is free from cracking. During the rotating process of the rotating shaft, the centrifugal force applied onto the non-metallic magnetic ring is transferred onto the annular convex edge. As a result, the condition that the motor does not run due to the cracking / shedding state of the non-metallic magnetic ring is avoided.