Special-shaped needle bearing

Abstract

The invention discloses a special-shaped needle roller bearing, which comprises: a bearing shell, a bearing inner ring and a cage, the cage is arranged concentrically between the bearing shell and the bearing inner ring, and the cage includes a first steel ring, a second Two steel rings and needle rollers, the first steel ring and the second steel ring are connected by a support bar at an annular interval, and arc-shaped plates are respectively provided on both sides of the support bar to clamp the needle rollers. Both ends of the needle are respectively embedded in the first steel ring and the second steel ring, and the outer diameter of the needle roller gradually decreases from the middle to the two ends. The special-shaped needle roller bearing of the present invention especially adopts needle rollers with a large diameter in the middle and small diameters at both ends to increase the radial force of a single needle roller. The radial force range greatly improves the radial force capacity of the needle roller bearing and prolongs the service life of the bearing.

Description

Technical field [0001] The invention relates to the field of bearings, in particular to a special-shaped needle roller bearing. Background technique [0002] Bearings can be divided into rolling bearings and sliding bearings according to the different friction properties of moving elements. Among them, rolling bearings have been standardized and serialized, but compared with sliding bearings, their radial dimensions, vibration and noise are larger, and the price is higher. . [0003] Needle roller bearing is a commonly used bearing, ordinary needle roller bearing, due to the small diameter and relatively long length of the needle roller, the radial force of the bearing is weak, the force of the needle roller is large, and it is easy to wear. The life is shortened, which is not conducive to heavy load and low operation, and reduces the use range of needle roller bearings. Summary of the invention [0004] The purpose of the present invention is to provide a special-shaped needle ro...

AI Technical Summary

Problems solved by technology

[0002] Bearings can be divided into rolling bearings and sliding bearings according to the friction properties of moving elements. Among them, rolling bearings have been standardized and serialized, but compared with sliding bearings, their radial size, vibration and noise are larger, and their prices are also higher.

[0003] Needle roller bearings are a commonly used bearing. For ordinary needle roller bearings, due to the small diameter and relatively long length of the needle rollers, the radial force of the bearing is weak, the force of the needle rollers is large, and it is easy to wear or wear, which makes the bearing The life is shortened, which is not conducive to heavy load and low operation, and reduces the use range of needle roller bearings

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