Patent ID: 9664268
Date: 2017-05-30
CPC Classifications: F16H

Claim:
1. A ball screw device comprising: a screw shaft having a spiral rolling body rolling groove; a nut member having a rolling body load rolling groove opposite to the rolling body rolling groove and forming a rolling body load rolling path; a rolling body circulation part having a rolling body circulation path configured to connect one end and the other end of the rolling body load rolling path; and a rolling body configured to endlessly circulate along the rolling body load rolling path and the rolling body circulation path, wherein the rolling body circulation part is formed by combining a first split body and a second split body, the first split body has a fixing section fixed to an outer surface of the nut member, and the second split body has a pair of leg sections configured to scoop up the rolling body moving along the rolling body load rolling path and return the rolling body to the rolling body load rolling path, a connecting section configured to connect the pair of leg sections and disposed between the first split body and the nut member, and a pair of shoulder sections facing side surfaces of the first split body in two directions so as to sandwich the first split body between the pair of shoulder sections.