Chain unit sealed and lubricated with magnetic fluid and chain having same

US11353088B2 · kind B2 · utility

Assignee

• TSINGHUA UNIVERSITY · CN

Inventors

• Decai Li · Beijing, CN
• Yanwen Li · Beijing, CN
• Siyu Chen · Beijing, CN

Key dates

• Filing date: Oct 21, 2021
• Grant date: Jun 7, 2022
• Expiry date: Oct 21, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/43
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A chain unit lubricated and sealed with magnetic fluid includes a pin shaft, a magnetic sleeve, a first pole piece and a second pole piece. The sleeve is fitted over an outer periphery of the pin shaft. Both ends of the pin shaft protrude from the sleeve. A first gap exists between an inner peripheral surface of the sleeve and an outer peripheral surface of the pin shaft. The first pole piece is arranged at one of the sleeve and has a first mating hole. A second gap exists between an inner wall surface of the first mating hole and the outer peripheral surface of the pin shaft. The second pole piece is arranged at the other end of the sleeve and has a second mating hole. A third gap exists between an inner wall surface of the second mating hole and the outer peripheral surface of the pin shaft.