Multi-aperture positioning bearing

Abstract

The invention discloses a multi-aperture positioning bearing. The multi-aperture positioning bearing comprises a bearing inner ring, a bearing outer ring and balls between the bearing inner ring and the bearing outer ring, wherein a plurality of first guide holes are evenly formed in the bearing inner ring in the radial direction, first guide rods are arranged in the first guide holes, the inner ends of the first guide rods penetrate into the inner wall of the bearing inner ring, a first adjusting ring is rotationally arranged on the bearing inner ring, the first adjusting ring rotates to drive the first guide rods to stretch out and draw back in the first guide holes to abut against a rotating shaft, a plurality of second guide holes are evenly formed in the bearing outer ring in the radial direction, second guide rods are arranged in the second guide holes, the outer ends of the second guide rods penetrate out of the outer wall of the bearing outer ring, a second adjusting ring is rotationally arranged on one side of the bearing inner ring, and the second adjusting ring rotates to drive the second guide rods to stretch out and draw back in the second guide holes to abut against abearing pedestal. The multi-aperture positioning bearing can be matched with various shafts and bearing seats with different shaft diameters for installation, extra multi-model parts for matching arenot needed, and it is guaranteed that the rotating shaft and the bearing inner ring is concentric.

Description

technical field [0001] The invention belongs to the technical field of bearings, in particular to a positioning bearing with multiple diameters. Background technique [0002] Bearings are used on mechanical rotating shafts to reduce the friction between the rotating shaft and the shaft hole during the rotation process. By installing bearings, the wear between the rotating shaft and the shaft hole can be reduced, thereby increasing the service life of mechanical equipment. The shaft diameter of the bearing inner ring used now is generally fixed. When assembling the bearing and the shaft, it is generally necessary to use the principle of thermal expansion and contraction to cool the shaft before inserting the shaft into the shaft hole of the inner ring of the bearing. The tight fit is not only inconvenient to assemble, but also one type of bearing corresponds to one shaft diameter. If the shaft diameter changes, it is necessary to replace the bearing with a different shaft hol...

AI Technical Summary

Problems solved by technology

The shaft diameter of the bearing inner ring used now is generally fixed. When assembling the bearing and the shaft, it is generally necessary to use the principle of thermal expansion and contraction to cool the shaft before inserting the shaft into the shaft hole of the inner ring of the bearing. The tight fit is not only inconvenient to assemble, but also one type of bearing corresponds to one shaft diameter. If the shaft diameter changes, it is necessary to replace the bearing with a different shaft hole diameter.

Therefore, there have been some bearings with adjustable bearing inner ring aperture, such as CN106763225A discloses a roller bearing with adjustable shaft installation aperture, the bearing carries out the adjustment of the bearing inner ring aperture by installing a detachable annular mounting sleeve on the bearing inner ring , but it is still necessary to adjust the aperture by replacing the mounting sleeves with different internal apertures, it is still inconvenient to adjust, and it is necessary to produce multiple mounting sleeves with different apertures to match

Another example is CN205478928U, which discloses an adjustable bearing with an inner ring. This bearing makes the moving fixing parts slide by rotating the moving rod, so that the diameter of the shaft hole formed inside each moving fixing part can be adjusted. However, this adjustable bearing is very slow after the adjustment is completed. It is easy to cause the shaft and the inner ring of the bearing to be out of concentricity. It requires very precise measurement or tooling to ensure the concentricity of the shaft and the inner ring of the bearing. Therefore, it is still inconvenient to assemble, and it is difficult to ensure the concentricity of the shaft and the inner ring of the bearing after assembly.

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