Hiroki Nakagawa

Title: Hiroki Nakagawa: Innovator in Chain Transmission Technology

Introduction

Hiroki Nakagawa is a prominent inventor based in Ishikawa, Japan. He has made significant contributions to the field of chain transmission technology, holding 2 patents that showcase his innovative approach to engineering.

Latest Patents

One of Nakagawa's latest patents is a chain transmission device. This invention addresses the reduction of the contact area with a chain guide by utilizing a back surface of a link plate that features a convex portion. This design effectively reduces the friction coefficient in a fluid lubrication region. Additionally, the link plate is coated with a film containing 10% or more of chromium. A friction modifier made from a molybdenum compound, combined with lubricating oil, promotes the generation of MoS by the coating film, thereby preventing an increase in the friction coefficient in a boundary lubrication region.

Another notable patent is for a chain and its manufacturing method. This chain consists of multiple inner links and outer links. Each inner link features a pair of inner plates, each with a bush hole and a bush. The bush is designed with end portions that are press-fitted into the bush holes of the inner plates. The outer links consist of a pair of outer plates and a pin. Notably, the diametric dimension in the pitch direction of the inner diametric surface of the bush remains constant along its entire axial length. Furthermore, the diametric dimension in the height direction at each end portion of the bush is smaller than that at the intermediate part located between the inner plates.

Career Highlights

Hiroki Nakagawa is currently employed at Daido Kogyo Co., Ltd., where he continues to develop innovative solutions in chain technology. His work has significantly impacted the efficiency and performance of chain systems in various applications.

Collaborations

Throughout his career, Nakagawa has collaborated with talented individuals such as Motoki Tanaka and Satoshi Yamashita. These collaborations have fostered a creative environment that encourages the development of cutting-edge technologies.

Conclusion

Hiroki Nakagawa's contributions to chain transmission technology exemplify his innovative spirit and dedication to engineering excellence. His patents reflect a deep understanding of mechanical systems and a commitment to improving their functionality.