| 摘要 |
A bogie truck for a rail vehicle comprises a pair of spaced side frames 10, front and rear wheel and axle sets 15, 16 extending transversely between the side frames and rotatable in bearing assemblies 18 which are connected by primary suspension means 19 to the side frames and a transverse bolster 11 connected between the side frames and having a mounting for connection to the rail vehicle body. Each wheel 16 has coaxial annular braking surface on opposite sides thereof which are engageable by movable brake pads 28. All of the brake pads 28 are connected, through a mechanical linkage assembly 21, 22, 23, 43, 29, to a single fluid-actuated piston and cylinder assembly 33, whereby all of the brake pads 28 may be moved into or out of engagement with their associated braking surfaces by operation of the single assembly 23, which may be mounted on or off the bogie.
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