Research and development of ultra-large eccentricity permissible type constant velocity joint for practical application of new drive trains

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04158
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18040:Machine elements and tribology-related
• Research Institution: Shizuoka Institute of Science and Technology
• Principal Investigator: Nozaki Takashi 静岡理工科大学, 理工学部, 教授 (20548888)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 軸継手 / 混合潤滑 / 微小滑り / ヘルツ接触 / 接触解析 / 転がり疲労寿命 / 機構解析 / 振動

Outline of Final Research Achievements

As a new mechanical element to realize a new drive system, we have researched and developed ultra-large eccentricity permissible type constant velocity joint (hereinafter referred to as the joint). In order to put the joint into practical use, it is necessary to clarify the durability that serves as a design guideline for the joint. In this study, as one of the main durability of the joint, the life of the guide groove where the ball is placed between the drive shaft side and the driven shaft side rolls is considered, and the life theory of the joint is constructed and clarified by theoretical calculation. In order to obtain data to support these life theories, we have developed and designed a new life test rig dedicated to the joint and conducted life tests. At present, surface damage such as flaking has not been achieved, but the number of data acquisitions will be increased while changing the test conditions to improve the accuracy of the constructed life theory.

Free Research Field

動力伝達系における機素潤滑、機械要素、機構設計、及び振動・騒音

Academic Significance and Societal Importance of the Research Achievements

現在自動車の電動化が積極的に推進され、さらに空飛ぶクルマなどが現実となりつつあるモビリティの変革期においては、新たな駆動系が求められている。本軸継手の持つ超大偏心量許容特性、等速性、及び軸方向の短さが、これら駆動システムの小型軽量化などに寄与することができる。さらには、ヒューマノイドロボットや人間協調型ロボットの駆動システムにおいても、ごく狭い範囲で摩擦損失の少ない円滑な作動を可能とすることから、小型軽量化やエネルギー効率の向上を図ることができる。