Patent ID: 8100025
Filing Date: 2012-01-24
Classification: F16C,F16H,Y10T

Abstract:
1. A ball screw with rolling element retainers comprising: a shaft provided with a helical channel in an outer circumferential surface thereof; a nut provided with a through hole for insertion of the shaft, the through hole being provided in an inner circumferential surface thereof with a helical groove opposite the helical channel, the helical channel and the helical groove defining a circulation passage; and a rolling module disposed in the circulation path, the rolling module including plural retainers and rolling elements, each of the retainers being provided with a central retaining portion, two side retaining portions disposed at two sides of the central retaining portion, and two linking portions linking the central retaining portion with the two side retaining portions, the central retaining portion, the side retaining portions and the linking portions defining two retaining spaces, each of the retaining spaces being provided for accommodation of one rolling element, each of the side retaining portions being provided with a rolling channel on an external end surface thereof; the ball screw with rolling element retainers is characterized in that: between every such two rolling element retainers is disposed another rolling element, and when the respective rolling element retainers move, the another elements is confined in a space defined by the rolling channels at two ends of the respective rolling element retainers, so as to prevent the respective rolling element retainers from impacting one another, and consequently reducing the noise and vibration produced during movement of the ball screw.