Yoshiaki Sakajiri

Title: Yoshiaki Sakajiri: Innovator in Bearing Technology

Introduction

Yoshiaki Sakajiri is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of bearing technology, holding two patents that showcase his innovative approach to engineering. His work is primarily associated with NSK Corporation, a leading company in the manufacturing of bearings and precision machinery.

Latest Patents

Sakajiri's latest patents include a ball bearing and a rolling bearing. The ball bearing patent describes a design featuring an inner ring fitted on a rotational shaft, which includes an inner ring raceway on its outer circumferential surface. The outer ring has an outer ring raceway on its inner circumferential surface, with a plurality of balls rotatably positioned between the two raceways. A crown resin cage retains the balls at equal intervals in a circumferential direction. This design allows for a bore diameter of the inner ring to be 100 mm or more, with a radial clearance of 20 microns or more when assembled to the rotational shaft.

The rolling bearing patent outlines a relationship between the minimum thickness of the outer ring raceway and the diameter of each rolling element. This design ensures that even when the outer ring is fixed in a low-rigidity transmission case, elastic deformation can be prevented without unnecessarily increasing the thickness of the outer ring. The dimensions are controlled to maintain sufficient rigidity and prevent early exfoliation based on elastic deformation.

Career Highlights

Throughout his career, Yoshiaki Sakajiri has focused on developing innovative solutions in the bearing industry. His patents reflect a deep understanding of mechanical engineering principles and a commitment to enhancing the performance and reliability of bearing systems.

Collaborations

Sakajiri has collaborated with notable colleagues, including Hiromichi Takemura and Susumu Tanaka. Their combined expertise has contributed to advancements in bearing technology and has fostered a collaborative environment for innovation.

Conclusion

Yoshiaki Sakajiri's contributions to bearing technology through his patents demonstrate his innovative spirit and engineering prowess. His work at NSK Corporation continues to influence the industry, paving the way for future advancements in mechanical design.