Bearing or thrust hobbing gear capable of achieving automatic clearance adjustment

Abstract

The invention discloses a bearing or thrust hobbing gear capable of achieving automatic clearance adjustment, and relates to the technical field of materials and machinery. The invention mainly aims to provide a technique for automatic clearance or gap adjustment, and the technique is applicable to the bearing or thrust hobbing gear so as to enable the bearing or thrust hobbing gear to have a relatively stable clearance or gap. According to the main technical scheme, through reasonable design of structures of friction bodies, temperature control deformation bodies or an electric device is usedfor enabling the friction bodies to deform or shift along with working conditions. Compared with known bearings or thrust hobbing gears, the bearing or thrust hobbing gear has the characteristics ofbeing more stable in clearance or gap, greater in bearable limit rotating speed, smoother in operation, higher in precision, and the like. The technique for automatic clearance adjustment is applicable to sliding bearings, rolling bearings, thrust hobbing gears and other mechanical devices requiring automatic clearance adjustment.

Description

technical field [0001] The invention relates to material mechanics and mechanics, and belongs to the field of mechanical technology. Background technique [0002] The currently known bearings or thrust hobbing gears all have the defect that the clearance or clearance changes with the use conditions. The main reason is that the temperature difference of the workpiece is caused by the change of the load and the heat generated by friction. The load change is mainly caused by the deformation of each part after being loaded; among the factors of temperature change, the heat dissipation conditions of the friction surface of the inner ring and the friction surface of the outer ring are usually different, resulting in low temperature of the outer ring and high temperature of the inner ring , the inner ring expands more from the radial direction outward, the outer ring expands less from the radial direction outward, and the gap between the inner and outer rings decreases. If it is a ...

AI Technical Summary

Problems solved by technology

[0002] The bearings or thrust hobbing gears known to the public all have the defect that the clearance or clearance changes with the use conditions, the main reason is the change of load and the temperature difference of the workpiece caused by the heat generated by friction

The load change is mainly caused by the deformation of each part after being loaded; among the factors of temperature change, the heat dissipation conditions of the friction surface of the inner ring and the friction surface of the outer ring are usually different, resulting in low temperature of the outer ring and high temperature of the inner ring , the inner ring expands more from the radial direction outward, the outer ring expands less from the radial direction outward, and the gap between the inner and outer rings decreases. If it is a thrust hobbing gear or a rolling bearing, plus the thermal expansion of the rolling elements between the inner and outer rings , will lead to further reduction of clearance or clearance, which has a great impact on the accuracy, life and positioning of bearings or thrust hobbing gears, especially for thrust hobbing gears, due to the need to transmit thrust between rolling elements ( See Chinese patent: ZL 201820925392.6), so the clearance must be zero or negative, and the clearance cannot be greater than zero when the load increases, and the clearance will further decrease after the temperature difference occurs during operation, so the life of the workpiece is not long. publicize the solution to such problems

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