Example embodiments relate to implementing self-contained power sources for railcars. A railcar may include an air turbine that comprises a generator. The air turbine converts mechanical energy received from air to electrical energy by way of the generator. In some implementations, the air turbine is selectably coupled to the air brake system of the railcar and can convert mechanical energy received from pressurized air of the air brake system. The railcar can further include a pneumatic valve and a controller that can cause the pneumatic valve to open when the air pressure of the air brake system is at or above a predetermined level. Opening the pneumatic valve provides pressurized air to the air turbine from the air brake system and/or an exhaust pipe. The air turbine is a Wells turbine or a ram air turbine in some examples.

Example embodiments relate to implementing self-contained power sources for railcars. A railcar may include an air turbine that comprises a generator. The air turbine converts mechanical energy received from air to electrical energy by way of the generator. In some implementations, the air turbine is selectably coupled to the air brake system of the railcar and can convert mechanical energy received from pressurized air of the air brake system. The railcar can further include a pneumatic valve and a controller that can cause the pneumatic valve to open when the air pressure of the air brake system is at or above a predetermined level. Opening the pneumatic valve provides pressurized air to the air turbine from the air brake system and/or an exhaust pipe. The air turbine is a Wells turbine or a ram air turbine in some examples.

A railcar bogie includes: a cross-beam supporting a carbody; pair of axles at both cross-beam sides in car longitudinal direction and extending in car-width direction; bearings at both car-width direction sides of each axle and rotatably supporting axles; axle-boxes accommodating respective bearings; plate-springs supporting both car-width direction end-portions of the cross-beam and extending in car longitudinal direction, both car longitudinal direction end-portions of each plate-springs supported by axle-boxes; pressing members at both car-width direction end-portions of the cross-beam placed on respective car longitudinal direction middle-portions of plate-springs, lower surface of a portion of each pressing member having a convex downward circular-arc shape in side-view, the portion pressing the plate-spring, a middle-portion upper surface of each plate-spring having convex downward circular-arc shape in side-view, the middle-portion pressed by the pressing member, and a lower surface curvature of the pressing member larger than the upper surface curvature of the middle plate-spring portion.

A railcar bogie includes: a cross-beam supporting a carbody; pair of axles at both cross-beam sides in car longitudinal direction and extending in car-width direction; bearings at both car-width direction sides of each axle and rotatably supporting axles; axle-boxes accommodating respective bearings; plate-springs supporting both car-width direction end-portions of the cross-beam and extending in car longitudinal direction, both car longitudinal direction end-portions of each plate-springs supported by axle-boxes; pressing members at both car-width direction end-portions of the cross-beam placed on respective car longitudinal direction middle-portions of plate-springs, lower surface of a portion of each pressing member having a convex downward circular-arc shape in side-view, the portion pressing the plate-spring, a middle-portion upper surface of each plate-spring having convex downward circular-arc shape in side-view, the middle-portion pressed by the pressing member, and a lower surface curvature of the pressing member larger than the upper surface curvature of the middle plate-spring portion.

The present invention relates to a clutch device 18 for connecting an engine 14 to a transmission 16 of a vehicle, in particular a rail vehicle, said device comprising at least one filament-reinforced articulation device 36, at least one first flange 40 that is associated with the engine 14 and at least one second flange 42 that is associated with the transmission 20, the at least one filament-reinforced articulation device 36 coupling together the first flange 40 associated with the engine 14 and the at least one flange associated with the transmission 16.

The present invention relates to a clutch device 18 for connecting an engine 14 to a transmission 16 of a vehicle, in particular a rail vehicle, said device comprising at least one filament-reinforced articulation device 36, at least one first flange 40 that is associated with the engine 14 and at least one second flange 42 that is associated with the transmission 20, the at least one filament-reinforced articulation device 36 coupling together the first flange 40 associated with the engine 14 and the at least one flange associated with the transmission 16.

An end play measurement apparatus is provided that measures end play of a tapered roller bearing of a gear unit. The gear unit supports a large-gear shaft, with which a gear is fitted, via the tapered roller bearing. The end play measurement apparatus includes a power generation unit, which is fixed to the large-gear shaft and generates power to move the gear unit backward and forward in the axial direction, a position change unit, which is interposed between the power generation unit and the gear unit and changes the axial position of the gear unit by using the power of the power generation unit, and a booster mechanism, which has a free end that receives the power of the power generation unit to boost the power.

An end play measurement apparatus is provided that measures end play of a tapered roller bearing of a gear unit. The gear unit supports a large-gear shaft, with which a gear is fitted, via the tapered roller bearing. The end play measurement apparatus includes a power generation unit, which is fixed to the large-gear shaft and generates power to move the gear unit backward and forward in the axial direction, a position change unit, which is interposed between the power generation unit and the gear unit and changes the axial position of the gear unit by using the power of the power generation unit, and a booster mechanism, which has a free end that receives the power of the power generation unit to boost the power.

A chassis frame for a rail vehicle which includes at least one drive unit fastened to the chassis frame via at least one elongated fastener, wherein the at least one fastener is arranged transversely with respect to the direction of travel and protrudes into the chassis frame or is guided through brackets which are fixedly connected to the chassis frame and protrudes into a space above or below the chassis frame in order to reduce the weight for the bearing of the drive unit and to facilitate mounting of the drive unit.

A bogie includes a bogie frame, a first running wheel and a second running wheel, at least one driving device, a first horizontal wheel, a second horizontal wheel, a first horizontal safety wheel connected to the first horizontal wheel and moving in synchronization with the first horizontal wheel, and a second horizontal safety wheel connected to the second horizontal wheel and moving in synchronization with the second horizontal wheel. The bogie frame has a straddle recess suitable for straddling a rail. The first running wheel and the second running wheel are pivotably mounted onto the bogie frame respectively and are coaxially spaced apart. The at least one driving device is mounted onto the bogie frame and located between the first running wheel and the second running wheel to drive the first running wheel and the second running wheel.