A rail wheel set for a car which can be moved on a rail of a rail system has a bearing housing with a radial suspension for connecting the rail wheel set to the car, and two running wheels which are rotatably mounted on the bearing housing. Each wheel has a respective rail rolling surface, the shape of which is adapted to the contour of a running surface of the rail, and a respective ground rolling surface. The wheels can roll independently of each other on the running surface of the rail or on the ground. The rail wheel set is secured to a chassis of a car for transporting objects on a rail system.

A wheel set intermediate frame for a rail vehicle includes a plurality of mounting interfaces for chassis components at predetermined positions. Part of the wheel set intermediate frame for a rail vehicle is also at least one defined mounting interface for fixing to a subframe of a car body of a rail vehicle. A rail vehicle and a method for producing a wheel set intermediate frame for a rail vehicle are also provided.

Two support frames support opposite wheels rollably on a rail and support the vehicle body through suspension systems. At one end, four L-shaped links and four support links are each coupled, bilaterally symmetrically and in front of and behind the wheels, to the two support frames in a manner allowing rotation on the support frames about an axis in the front-rear direction below and above the center axis of the wheels. In a bending portion in the middle, the L-shaped links are supported by the vehicle body rotatably about an axis in the front-rear direction, and the L-shaped links and support links are coupled at the other end to each other so as to allow rotation about an axis in the front-rear direction.

Two support frames support opposite wheels rollably on a rail and support the vehicle body through suspension systems. At one end, four L-shaped links and four support links are each coupled, bilaterally symmetrically and in front of and behind the wheels, to the two support frames in a manner allowing rotation on the support frames about an axis in the front-rear direction below and above the center axis of the wheels. In a bending portion in the middle, the L-shaped links are supported by the vehicle body rotatably about an axis in the front-rear direction, and the L-shaped links and support links are coupled at the other end to each other so as to allow rotation about an axis in the front-rear direction.

A running gear for a rail vehicle includes first and second independent wheel assemblies on opposite sides of a longitudinal vertical median plane of the running gear, each having an independent wheel and a bearing assembly for guiding the wheel about a revolution axis fixed relative to the bearing assembly. In a reference position of the running gear, the revolution axes of the first and second wheel assemblies are coaxial and perpendicular to the longitudinal vertical median plane. The running gear further includes one or more steering actuators for moving the bearing assembly of at least one of the two wheel assemblies away from the reference position in a longitudinal direction parallel to the longitudinal vertical median plane, a wheel flange contact detection unit for detecting a contact between a flange of the wheel with a rail, and a controller for controlling the one or more steering actuators.

A running gear for a rail vehicle includes first and second independent wheel assemblies on opposite sides of a longitudinal vertical median plane of the running gear, each having an independent wheel and a bearing assembly for guiding the wheel about a revolution axis fixed relative to the bearing assembly. In a reference position of the running gear, the revolution axes of the first and second wheel assemblies are coaxial and perpendicular to the longitudinal vertical median plane. The running gear further includes one or more steering actuators for moving the bearing assembly of at least one of the two wheel assemblies away from the reference position in a longitudinal direction parallel to the longitudinal vertical median plane, a wheel flange contact detection unit for detecting a contact between a flange of the wheel with a rail, and a controller for controlling the one or more steering actuators.

A portal-axle of bogies for light rail vehicles, such as for example trams or light rail metros with street running, is described, the light rail vehicles being characterized by a floor, i.e. a walking surface, lowered with respect to the rails. The portal-axle comprises two shoulders equipped with spindles for mounting wheels and with a central portion for structurally connecting the shoulders. Unlike conventional solutions, the central portion is not made by casting or forging, but advantageously is simply defined by at least two bars coupled thereto during the assembly. The bars are easily available on the market at low cost, have lower weight with respect to a traditional forged/cast component and allow modularity and versatility in dimensioning the portal-axle to be obtained.

A running gear for a low floor rail vehicle includes a frame, a single pair of independent left and right wheels, and a single pair of left and right rotation bearings attached to the frame that allow the left and right wheels to independently spin about a left and right spin axis, respectively. The running gear further includes a secondary suspension resting on the frame for supporting a vehicle body of the rail vehicle and lateral stop means fixed to the frame for laterally guiding the vehicle body of the rail vehicle. The lateral stop means includes a left and a right contact face facing a left and a right, respectively, transverse direction parallel to the transverse reference axis. The left and right contact faces are located between the left and right wheels.

A wheelset guide for a rail vehicle, which has a bogie frame, includes at least one longitudinal support, and includes a wheelset bearing for a wheelset of the rail vehicle, wherein the wheelset bearing is connected to the bogie frame and includes a rocker that is pivotably attached to the bogie frame via an elastic rocker bearing, and a pin guided by the rocker bearing, where the bogie frame forms a receptacle for the rocker bearing, which is configured such that the force is introduced into the bogie frame via the rocker bearing itself, and the rocker bearing is positioned in the receptacle in order to improve the strength and stability of the attachment of the rocker to the bogie frame or to the longitudinal support with an open profile.

A wheelset guide for a rail vehicle, which has a bogie frame, includes at least one longitudinal support, and includes a wheelset bearing for a wheelset of the rail vehicle, wherein the wheelset bearing is connected to the bogie frame and includes a rocker that is pivotably attached to the bogie frame via an elastic rocker bearing, and a pin guided by the rocker bearing, where the bogie frame forms a receptacle for the rocker bearing, which is configured such that the force is introduced into the bogie frame via the rocker bearing itself, and the rocker bearing is positioned in the receptacle in order to improve the strength and stability of the attachment of the rocker to the bogie frame or to the longitudinal support with an open profile.