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.

The invention discloses a cover plate mounting structure of a condenser. The cover plate mounting structure comprises a back drum, wherein a condenser cavity is formed in the back drum, and comprises a condenser cavity bottom wall, a plurality of condenser cavity side walls and a condenser cover plate positioned above the condenser cavity; a plurality of cover plate mounting parts are arranged at the periphery of the condenser cover plate; at least one of the condenser cavity side walls is provided with grooves parallel to the condenser cavity bottom wall; and the corresponding cover plate mounting parts are fixedly inserted in the grooves. The cover plate mounting structure of the condenser has the advantages of simple structure, simple installation and good positioning effect; and after the condenser cover plate is inserted, the high-frequency vibration stress of the back drum is absorbed by the inserted part, so that the stress concentration generated by such rigid fixed connection modes as screws is not caused, and the cracking risk of the condenser cover plate is not occurred.

The invention is applicable to the field of motors, and discloses a motor magnetic ring, a motor and a washing machine, wherein the motor magnetic ring includes a non-metallic magnetic ring sleeved on a rotating shaft and a metal sleeve sleeved on the non-metallic magnetic ring, and the non-metallic magnetic ring It includes a mounting part for matching with the rotating shaft sleeve and a magnetic ring working part located at one axial end of the mounting part and used to generate a magnetic field for detection by the control circuit board. The metal sleeve is sleeved on the mounting part. In the present invention, the non-metallic magnetic ring is axially divided into two parts: the installation part and the magnetic ring working part, and the installation of the non-metallic magnetic ring on the rotating shaft is realized through the installation part, and the magnetic field is generated by the magnetic ring working part for detection by the control circuit board In this way, the position of the magnetic poles of the rotor can be determined; at the same time, by installing a metal sleeve outside the installation part, there is no risk of cracking at the installation part of the non-metallic magnetic ring and the working part of the magnetic ring, thereby preventing the damage caused by the non-metallic magnetic ring. If the ring breaks or falls off, the motor will not work.