Eccentric bearing

摘要

An eccentric bearing for an electrohydraulic piston pump assembly of a vehicle brake system includes a shaft configured to be driven in rotation about its axis, a bearing ring which is eccentric relative to the shaft, and rolling bodies between the bearing ring and the shaft. The rolling bodies have different diameters corresponding to a varying width of a gap between the bearing ring and the shaft. When the shaft is driven in rotation, an eccentricity of the bearing ring revolves around the shaft at half of the rotational speed of the shaft and drives pump pistons to perform a reciprocating movement. A rolling body cage is open between the two largest rolling bodies. The rolling body cage loads the rolling bodies into the tapering gap and ensures that the rolling bodies revolve on the shaft when the shaft is driven.

主权项

1. An eccentric bearing for converting a rotary motion into a reciprocating motion, comprising:
a shaft configured to be driven rotationally; a bearing ring, which eccentrically surrounds the shaft; a plurality of rolling elements arranged around the shaft in a gap defined between the shaft and the bearing ring, wherein each of the rolling elements has one of a variety of diameters according to a variable width of the gap; and a rolling element cage configured to hold the plurality of rolling elements at relative spacings with respect to one another, wherein the variable width of the gap includes a maximum gap width and a minimum gap width located opposite the shaft from the maximum gap width, and wherein the rolling element cage exerts a spring action on the rolling elements in a narrowing direction of the gap defined circumferentially from the maximum gap width toward the minimum gap width.