Wave-shaped ball bearing retainer structure made of engineering plastics and connecting method

Abstract

The invention provides a wave-shaped ball bearing retainer structure made of engineering plastics and a connecting method, a retainer comprises an annular upper retainer and an annular lower retainer, the annular upper retainer and the annular lower retainer are respectively provided with a semicircular ball pocket and a connecting part which are symmetrical to each other along the circular ring direction, and the connecting part of the upper retainer and the connecting part of the lower retainer are respectively provided with a cylindrical pin and a circular blind hole which are matched with each other; the top of the cylindrical pin is provided with a cone protruding outwards. The connecting method of the retainers comprises the steps that firstly, the balls, the upper retainer and the lower retainer are pre-assembled between the bearing inner ring and the bearing outer ring, the upper retainer and the lower retainer are pressed through a mold connected with an ultrasonic generating device, cylindrical pins are inserted into blind holes, and the ultrasonic generating device works in the pressing process; the cone accumulates energy to generate high temperature, so that the cylindrical pin and the blind hole are fused and welded into a whole. The retainer structure can be connected in an ultrasonic fusion welding mode, and compared with an existing engineering plastic retainer which is connected in a buckling mode, a riveting mode and the like, the machining precision and the retainer strength are effectively improved, and the machining efficiency is higher.

Description

technical field [0001] The invention belongs to the technical field of rolling bearing cages, and in particular relates to a structure and connection method of engineering plastic wave-shaped ball bearing cages. Background technique [0002] The bearing cage is one of the parts in the rolling bearing. Its specific function is to separate the rolling elements inside the rolling bearing from each other, prevent the rolling elements from colliding and rubbing against each other in motion, and keep the rolling bearing running smoothly. Bearing cages can be made of different materials. Commonly used materials are metals, such as steel, copper and copper alloys, aluminum alloys, etc. In recent decades, with the development of engineering plastics industry, a large number of high-performance engineering plastics have been researched and developed. Performance engineering plastics have been rapidly promoted and used in the field of cages. Steel cages have the disadvantages of high ...

AI Technical Summary

Problems solved by technology

However, melting the rivet rod requires high energy, and it needs to be formed and kept warm after melting. Therefore, the cage rivet welding method takes a long time, high energy consumption, low processing efficiency, and cannot meet the requirements of high-efficiency production.

Images