Japan developed a self-centering pulley for electromagnetic clutches and CVT
Bando Chemical Industries demonstrated the ability to automatically correct the flat belt position in contact with the rotating pulley at the Energy Conservation and Environmental Protection Exhibition 2007 (July 11-13, 2007, Tokyo Ariake International Convention and Exhibition Center). Power transmission mechanism (figure). The mechanism can also be seen as a "self-centering pulley" that aligns the pulley with the centerline of the flat belt. Commodities for the blower power transmission are scheduled to be launched during the year. In addition, it is also intended to be applied to fields such as electromagnetic clutches and CVTs. The pulley structure developed this time is such that the pin is mounted on a rotating shaft driven by a motor, and the rotating body is supported by a pin. A hinge member and a bearing are provided between the shaft and the rotating body. The pin is obliquely mounted in a direction in which the flat belt applies a force to the rotating body. Therefore, the rotating body can be tilted with the center of the pin as the axis. Thus, even if the flat belt is bent away from the center of the rotating body, the self-centering function of automatically returning the flat belt to the center by the tilt of the rotating body can be realized. Previously, the V-belt or the like was inserted into the pulley groove to prevent the meandering track of the meandering from deviating from the rotating body. Therefore, the flat belt is subjected to load from the side, resulting in a decrease in transmission efficiency. If you use this technology, you will not be affected by the side load, which will increase the transmission efficiency to about 98% (when the input power is 10kW). The company originally developed a three-V-belt blower with a transmission efficiency of approximately 96%. If this self-centering function is reversed, such as moving the pulley in parallel, the flat belt will automatically follow this movement. In this way, it can be applied to fields such as electromagnetic clutches and CVTs.