FRICTION BEARING AND RACK-AND-PINION STEER IN CAR Russian patent published in 2011 - IPC F16C29/02 F16C33/20 B62D3/12 F16H19/04 

FIELD: machine building.

SUBSTANCE: friction bearing (7) consists of bushing (17) out of synthetic plastic with at least one circular groove (16) made on external periphery surface (15) of bushing, of circular-shaped elastic element (18) inserted in circular groove (16) and of couple of periphery, axially symmetrical and turned inside surfaces (21, 22). Bushing (17) also has two pairs of slots (23, 24) and (25, 26) each positioned so, that surfaces (21, 22) run between them along circumference; the slots facilitate corresponding surfaces (21, 22) travelling in radial direction inside/outside. Further, the bushing has at least one pair of internal periphery surfaces (27, 28) turned outside and passing from outside into radial direction relative to pair of surfaces (21, 22). Each surface (27, 28) forms a gap with corresponding external periphery surface from the side of teeth and from opposite to it side of a shaft of steer rack; the shaft is inserted and fixed in a through orifice formed with pairs of surfaces (21, 22) and (27, 28). The section of each surface (21, 22) comes into a sliding contact with a corresponding external periphery surface of the shaft of the steer rack, except for external periphery surfaces from the side of teeth and for opposite to it side of the shaft of the steer rack. There is also disclosed the rack-and-pinion steer including the above said friction bearing.

EFFECT: facilitating specified rigidity for shaft of steer rack in its radial direction and in axial direction of drive gear; also facilitation of movable support with low friction resistance in axial direction of shaft; reduced effect of relaxation of stresses due to creep strain and heat prehistory.

9 cl, 10 dwg