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Recent Patents on Bearing Pre-tightening


Yanling Zhao* and Jiashuo Zhang   Pages 1 - 12 ( 12 )


Background: Bearing has been widely used in automotive, aerospace, electronics industry and other fields.

Its pre-tightening technology is one of the most critical technologies. It has an important influence on the accuracy, speed, stiffness and temperature rise of the spindle. Proper pre-tightening force can eliminate bearing clearance and improve machining accuracy and efficiency of machine tools. Therefore, the development trend of bearing pre-tightening mechanism has been paid more and more attention.

Objective: In order to improve the processing efficiency and processing accuracy of the bearing system, the structure and function of the bearing pre-tensioning device are continuously enhanced.

Methods: This paper retraces various current representative patents relative to the mechanism of bearing pre-tightening.

Results: Through the investigation of a number of patents of bearing pre-tightening devices, the principles and effects of different bearing pre-tightening devices are classified and reviewed. Besides, the future development trend of bearing pre-tightening devices is discussed.

Conclusion: The optimization of the bearing pre-tightening device is conducive to improving processing efficiency and quality. A controllable pre-tightening force is the research direction, and more related patents will be invented in the future.


Bearing, bearing pre-tightening, spindle, pre-tightening mechanism, bearing ring, pre-tightening method.


School of Mechanical and Power Engineering, Harbin University of Science and Technology, 150080, School of Mechanical and Power Engineering, Harbin University of Science and Technology, 150080

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