Ultrathin high-rotation-speed cylindrical roller bearing for supporting cold molding machine spindle

Abstract

The invention discloses an ultrathin high-rotation-speed cylindrical roller bearing for supporting a cold molding machine spindle. The cylindrical roller bearing comprises an outer ring, an inner ring, a rolling body and a holder. The whole bearing is designed to be of an integrated frame structure. The guide clearance and tolerance range of the rolling body and the holder are obtained in the modethat the optimal size of a roller way is calculated according to the limit design rotation speed, the load and other related work conditions of the bearing and in combination with thermodynamics andtribology analysis and the design standards of a bearing external gap value. The cylindrical roller bearing has the beneficial effects that the phenomenon that under the high-speed operation conditionof the bearing, a roller is liable to be clamped can be avoided effectively through the design of the bearing external gap value and the calculation of a tolerance value, lubrication of the bearing is facilitated through reasonable tolerance setting, the end face of the rolling body and the gear edge are in point contact during bearing operation, heat generated by surface contact is reduced substantially, abrasion of the rolling body is avoided, and thus the service life of the cylindrical roller bearing is prolonged effectively.

Description

technical field [0001] The invention relates to the technical field of cylindrical roller bearing assembly, in particular to a cylindrical roller bearing used for supporting the main shaft of an ultra-thin, high-speed cold plastic machine. Background technique [0002] The current supporting bearings for the main shaft of the cold molding machine are large, thin, ultra-precision, high-speed bearings, and the bearing structure space size is small. The requirements under working conditions, such as increasing the limit speed of the bearing only from the aspect of improving the bearing precision level, will inevitably lead to the increase of production cost and the waste of precision. And more importantly, the guide clearance of traditionally designed bearings is mostly a certain value, ignoring the tolerance of the guide surface of the ring and the guide surface of the cage, it is easy to cause a large deviation between the theoretical design guide clearance and the actual gui...

AI Technical Summary

Problems solved by technology

However, the bearing does not carefully calculate the actual gap width between the rolling surface and the cage, as well as the maximum allowable processing tolerance range, so it is difficult to ensure that the distance between each roller and the rib is just right, resulting in the friction between the bearing and the cage during rotation. there is a lot of uncertainty

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