Four-point contact ball bearing matching method and radial internal clearance pre-estimation method for matching

Abstract

The invention relates to a four-point contact ball bearing matching method and a radial internal clearance pre-estimation method for matching. The pre-estimation method comprises the following steps that (1), a standard inner sleeve ring and a standard outer sleeve ring in multiple the same type of bearing sleeve rings to be matched are selected, and a four-point contact ball bearing formed by nesting the standard inner sleeve ring, the standard outer sleeve ring and a rolling body in a matched manner has the standard radial internal clearance Gr0; and (2), a matching inner ring is selected, and the inner ring difference value of the diameter of the bottom of a peach-shaped raceway trench of the matching inner ring and the diameter of the bottom of a peach-shaped raceway trench of the stand inner sleeve ring is deltadi; a matching outer ring is selected, and the outer ring difference value of the diameter of the bottom of a peach-shaped raceway trench of the matching outer ring and the diameter of the bottom of a peach-shaped raceway trench of the standard outer sleeve ring is deltade; the radial internal clearance Gr of a four-point contact ball bearing obtained by nesting the matching inner ring, the matching outer ring and the rolling body with the set diameter size in a matched manner is pre-estimated to be Gr=Gr0+deltadi+deltade; and accordingly, the internal clearance of the bearings can be pre-estimated and determined before bearing nesting, and the bearing sleeve rings can be selected conveniently and fast.

Description

technical field [0001] The invention relates to a matching method of a four-point contact ball bearing and a method for estimating radial clearance during matching. Background technique [0002] In the process of fitting the bearings, it is necessary to select the inner ring and outer ring according to the clearance requirements. For ordinary ball bearings with two-point contact (such as deep groove ball bearings, angular contact ball bearings, etc.), since the shape of the groove is circular, the rolling elements can contact the bottom of the groove, so the radial clearance can use the formula (G r =D e -d i -2·D w ) to represent, where G r is the radial clearance of the bearing, D e is the bottom diameter of bearing outer ring groove, d i is the bottom diameter of bearing inner ring groove, D w is the diameter of the rolling element; the above values ​​can be accurately measured by instruments. In this way, it is convenient to estimate the radial clearance of the ...

AI Technical Summary

Problems solved by technology

[0003] For four-point contact ball bearings, since the groove shape is peach-shaped, and the rolling elements cannot directly contact the bottom of the peach-shaped groove, the radial clearance of four-point contact ball bearings cannot be used in the formula (G r =D e -d i -2·D w ), and there is no simple and practical radial clearance expression to calculate the radial clearance of four-point contact ball bearings

Since the radial clearance of the four-point contact ball bearing cannot be determined before the bearings are fitted together, it is impossible to accurately select the radial clearance of the four-point contact ball bearing, and the assembly efficiency is low

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