公开(公告)号：US20130335859A1

公开(公告)日：2013-12-19

申请号：US13788140

申请日：2013-03-07

Applicant: NIDEC CORPORATION

Inventor： Akio TATSUMI ,  Takashi FUJIWARA ,  Takayuki ISHINO ,  Kiyofumi INOUE ,  Akihiro YUDATE

IPC: G11B33/02

CPC classification number: G11B33/02 ,  G11B19/2009

Abstract: A base plate of a disk drive apparatus includes a motor base disposed around a central axis and a base body portion extending radially outward of the motor base. The motor base is made of a metallic material of a first type. The base body portion is made of a metallic material of a second type. Thus, the axial thickness of a portion of the base plate close to the central axis can be significantly reduced and a reduction in the stiffness of the portion can be prevented. Further, the motor base includes a flange portion and a plastic deforming portion. The flange portion and the plastic deforming portion are respectively in contact with at least a portion of both axial end surfaces of an inner end portion of the base body portion. Thus, extraction of the motor base in the axial direction is prevented.

Abstract translation: 盘驱动装置的基板包括设置在中心轴周围的马达基座和沿电动机底座径向向外延伸的基体部分。 马达基座由第一类金属材料制成。 基体部分由第二类金属材料制成。 因此，基板的靠近中心轴线的一部分的轴向厚度可以显着地减小，并且可以防止该部分的刚度的降低。 此外，马达基座包括凸缘部分和塑性变形部分。 凸缘部分和塑性变形部分分别与基体部分的内端部分的两个轴向端面的至少一部分接触。 因此，防止电动机基座沿轴向的提取。