Processing

Please wait...

Settings

Settings

Goto Application

1. WO2020115778 - TWO-AXLE RAILWAY BOGIE

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. Two-axle railway bogie including two wheelsets (7) and a frame (1) that supports the concave portion of a half-spherical centre bowl (2) that mates with a corresponding convex half-sphere that protrudes downwards a supporting plate (10) connected to the lower part of the car body of a railway vehicle, characterized in that said frame (1) is functionally connected to said two wheelsets (7) through two pairs of axlebox arms (6) each with a central part with a rotational coupling with transversal axis mating with a respective hinge (3) rotationally connected to said frame

(1) along a transversal axis; at each of its ends each axlebox arm (6) is rotationally connected, according to transverse axes, respectively at one end of a progressive cylindrical spring (8), which lies in a vertical longitudinal plane, and at one of said wheelsets (7); said frame (1) comprising two side frames (4) with the outer portions that support at least one side bearer (5) each.

2. Bogie as described in the previous claim characterized in that it comprises two anti-pitch bearers (9) interposed between the top of said frame (1) and said supporting plate (10), aligned in front and on the back of said centre bowl

(2) along a longitudinal horizontal axis passing through the vertical axis of such centre bowl (2) .

3. Bogie as described in previous claim 1 characterized in that it comprises two side bearers (5) on each side; all said side bearers (5) are located at the corners of a horizontal rectangle whose barycentre is located on the vertical axis of said centre bowl (2) such that said side bearers (5) also behave as anti-pitch bearers and contrast both pitch and roll of the car body.

4. Bogie as described by one of the previous claims characterized in that said frame (1) is a truss frame with a pyramidal shape with a rectangular base with said centre bowl (2) located at the upper tip and with each of said hinges (3) located at the lower vertices of the pyramid.

5. Bogie as described by one of the previous claims characterized in that said progressive helical springs (8) are of the variable wire pitch type.

6. Bogie as described by one of the previous claims characterized in that said progressive helical springs (8) are made of a variable section wire.

7. Bogie as described by one of the previous claims characterized in that said side bearers (5) are preloaded with suitable elastic components.

8. Bogie as described in previous claim 7 characterized in that such elastic components are cylindrical springs.

9. Bogie as described by one of the previous claims characterized in that said side bearers (5) and said anti pitch bearers (9) are covered with friction material.

10. Bogie as described by one of the previous claims characterized in that one or more of the rotational coupling of said axlebox arms (6) comprises suitable elements to obtain friction damping.