Novel double-row cylindrical roller bearing

Abstract

The invention discloses a novel double-row cylindrical roller bearing comprising an outer ring, an inner ring, and a cage. Two rows of cylindrical rollers and the cage of the two rollers are arranged between the inner ring and the outer ring. The outer ring race coupled with the two rows of cylindrical rollers is a single race simultaneously containing the two rollers. No blocking edge is arranged between the two rows of cylindrical rollers in the race for the two rows of rollers to roll. The race can be processed through one-time grinding. The dimension and the axiality of the race are constant, and a windage is easy to configure. Preferably, shaft holes are provided on opposite sides of the two rows of cylindrical rollers, and a pin coupled with the shaft holes is provided on the cage. Preferably, the cage is a modified-comb-shaped cage, and two rows of pockets are alternately arranged in parallel. A through hole is drilled on the bottom of the pockets, and a pin is inserted in the through hole. Two ends of the pin are respectively coupled with the shaft holes on the opposite ends of the two rows of cylindrical rollers. The shaft hole and the pin are positioned on a central line of the rollers. The linear velocity is approximately zero. The rollers operate stably, and the friction is low.

Description

technical field [0001] The invention relates to a new type of bearing, in particular to an NNU type double-row cylindrical roller bearing. Background technique [0002] The existing NNU double-row cylindrical roller bearings are used for machine tool spindles, and the structural types at home and abroad are as follows figure 1 As shown, the outer ring has three ribs, the inner ring has no ribs, a comb-shaped cage, and two rows of pockets are arranged in a staggered manner. [0003] This type of structure is a mature product structure. The fly in the ointment is that the outer ring has double raceways, and it is clamped and ground twice, so it is difficult to ensure consistent dimensions and coaxiality. The configuration of the clearance is difficult to achieve the consistency of the two columns. Contents of the invention [0004] The purpose of the present invention is to overcome the technical problems that the existing double-row cylindrical roller bearing outer ring h...

AI Technical Summary

Problems solved by technology

[0003] This type of structure is a mature product structure. The fly in the ointment is that the outer ring has double raceways, and it is clamped and ground twice. It is difficult to ensure the same size and coaxiality.

The configuration of the clearance is difficult to achieve the consistency of the two columns

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