Block brake assembly for the wheel of a railway vehicle

In a brake block assembly for a wheel of a railway vehicle, including a holder having at least one replaceable brake block, the assembly being pivotable about an axis parallel to the wheel axle and being displaceable toward the wheel so that the brake block is pressed against the periphery of the wheel when the brake is engaged, the improvement wherein said holder comprises a pair of spaced side members, said brake block having guide lugs and attaching lugs thereon projecting between said members, a leaf spring disposed between said members and being pivotably mounted at one end to said members, said attaching lugs having transverse openings therein and said spring extending through said openings for retaining said block against said holder and for pivoting said block away from and toward said holder during removal and replacement of said block, a removable lock pin on said side members bearing against an opposite end of said spring for locking said brake block against said side members, a pair of stop elements mounted between said side members and bearing against outer sides of a pair of said lugs for preventing tangential displacement of said block brake relative to said side members.