Expanding wedge actuation device

Details Expanding wedge actuation device Expanding wedge actuation device

1983-08-12

1985-10-29

Schwadron, Martin P.

Machine element or mechanism

Mechanical movements

Reciprocating to reciprocating

188343, 308 6R, F16D 5100

Patent

active

045494428

ABSTRACT:
A wedge mechanism particularly adapted for expanding brakes of motor vehicles including a housing, a wedge member, a pair of push rods displaceably supported in the housing action upon the brake shoes of the brake by opposing displacement in a common perpendicular direction, rollers arranged between one of the two wedge surfaces of the wedge member and a complementary inclined surface of the push rod located opposite it, a cage for the rollers, which in relation to the spreading wedge is movable in longitudinal direction and which in turn has two parallel side portions running in perpendicular direction, with machined openings in them in the direction of the axis of rotation of the rollers for guiding the ends of the rollers facing the side portions, characterized in that both rollers (9) have a face (20,27) at their ends, gradually changing over into their roller surface (21) confronting the inclined wedge surfaces and that the opening in the roller cage (13) is formed by a common recess (16,26) for said rollers (9) formed on the inside of each side portion (15) of the roller cage ( 13) for the complementary inclined surface (8) of the push rods (5), the edge surfaces (17) of which, facing each other in longitudinal direction (3) closely embrace the ends of the rollers (9) longitudinally and the bottom surfaces (19) of which are arranged to support the opposing face (20, 27) of the rollers (9), respectively.

REFERENCES:
patent: 3001838 (1961-09-01), Lamson et al.
patent: 3511103 (1970-05-01), Cox, Jr.
patent: 3599763 (1971-08-01), Bailey
patent: 3713712 (1973-01-01), Derner et al.

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