公开(公告)号：US09188210B2

公开(公告)日：2015-11-17

申请号：US13669871

申请日：2012-11-06

Applicant: HIWIN TECHNOLOGIES CORP.

Inventor： Ming-Yao Lin ,  Po-Chuan Hau ,  Yan-Yu Chen

IPC: F16H25/22

CPC classification number: F16H25/2214 ,  Y10T74/19753

Abstract: The invention provides an external circulation type ball screw device comprising screw shaft and nut having first and second screw grooves. A circulation member comprises first leg, second leg and connection portion. The first leg comprises a first end surface having first inner and outer points, and the second leg comprises a second end surface having second inner and outer points; first and second entrances formed on the first and second end surfaces of circulation passage; first and second thickness respectively provided between the first entrance and the first inner and outer points thereof; the second thickness being greater than the first; the third and fourth thickness respectively provided between the second entrance and the second inner and outer points thereof; the fourth thickness being greater than the third. The groove wall of the second screw groove occupied and the occurrence of broken teeth of the nut are reduced.

Abstract translation: 本发明提供一种外循环型滚珠丝杠装置，其包括具有第一和第二螺纹槽的螺杆轴和螺母。 循环构件包括第一腿，第二腿和连接部。 第一腿包括具有第一内部和外部点的第一端面，并且第二腿包括具有第二内部和外部点的第二端面; 形成在循环通道的第一和第二端面上的第一入口和第二入口; 第一和第二厚度分别设置在第一入口与其第一内外点之间; 第二厚度大于第一厚度; 第三和第四厚度分别设置在第二入口与第二内部和外部点之间; 第四厚度大于第三厚度。 占用第二螺纹槽的槽壁和螺母的齿的发生减少。