带式输送机的平衡托辊用在运输大块物料时可降低输送带和辊子的动载荷。这种支承结构(见图)是在成批生产的刚性三辊式托辊上安装带有两个辊子的双臂框架,用来代替中间辊子。框架可以绕固定的心轴摆动。这样,物料和框架上的第一个(沿输送带运行方向)辊子相遇时的夹角可以减小,并使辊子上的载荷 Belt Conveyor Balanced Rollers are used to reduce the dynamic load on conveyors and rollers when transporting bulk materials. This support structure (see picture) is a dual-arm frame with two rollers mounted on a mass-produced rigid three-roller idler instead of an intermediate roller. The frame can swing about a fixed mandrel. In this way, the angle between the material and the first roller of the frame (in the running direction of the conveyor belt) can be reduced and the load on the roller