Abstract: A wheel set with independent and combined rotation of the running surfaces of the wheels, of use as a driving axle of a transport device, e.g. an underground railway car. It comprises an axle 1 and wheels having hubs 2 rigidly connected to the axle 1. The running surface of one wheel is formed on a rim rigidly connected to the hub. The running surface 3 of the other wheel is formed on a rim 4 connected to the hub with possibility of rotation. The rim is connected to the hub via smooth surfaces of rotation, e.g. cylindrical surfaces 5 or conical surfaces 6. Parameters of the connection such as the diameter, roughness, hardness, or material are chosen subject to the condition that the torque defined by the frictional forces at the connection in a state of rest is greater than the torque applied to the axle when the transport device starts. During the process of motion, the torque decreases and the rim 4 can rotate relative to the hub, so that the wheels rotate at different angular speeds, e.g.

Abstract: A resilient wheel is provided comprising a hub and web having a rim mated to and resiliently bonded to the web with an elastomeric adhesive. Depending on the application the outer circumference of the rim may have a flange machined into it so that it serves as the tire for the wheel or machined smooth to accept a separate tire. To prevent the rim from shifting relative to the web as the elastomeric adhesive ages, a plurality of locking pins are inserted through the rim and bond line into the web and bonded into place. The rim is thus effectively prevented from shifting even if the adhesive substantially or even totally disbonds from the mated parts. Several variants of these locking pins are possible to achieve improved economy for maintenance purposes or improved longevity of the wheel.

Abstract: A wheel set with independent and combined rotation of the running surfaces of the wheels, of use as a driving axle of a transport device, e.g. an underground railway car. It comprises an axle 1 and wheels having hubs 2 rigidly connected to the axle 1. The running surface of one wheel is formed on a rim rigidly connected to the hub. The running surface 3 of the other wheel is formed on a rim 4 connected to the hub with possibility of rotation. The rim is connected to the hub via smooth surfaces of rotation, e.g. cylindrical surfaces 5 or conical surfaces 6. Parameters of the connection such as the diameter, roughness, hardness, or material are chosen subject to the condition that the torque defined by the frictional forces at the connection in a state of rest is greater than the torque applied to the axle when the transport device starts. During the process of motion, the torque decreases and the rim 4 can rotate relative to the hub, so that the wheels rotate at different angular speeds, e.g.