Crowded rolling needle bearing provided with abnormal-shaped seal ring

Abstract

The invention discloses a crowded rolling needle bearing provided with an abnormal-shaped seal ring. The crowded rolling needle bearing comprises a punching outer ring and a seal ring, a washer and multiple rolling needles which are arranged along the axial direction of the punching outer ring from left to right in sequence and positioned in a rolling path in the punching outer ring, wherein the seal ring is an abnormal-shaped seal ring which has an abnormal-shaped section; the radial length of the abnormal-shaped section is greater than the axial length of the abnormal-shaped section; one radial end, which is in contact with a shaft, of the abnormal-shaped section is arc-shaped; the rolling needles are uniformly distributed in the rolling path of the punching outer ring. Through the manner, the abnormal-shaped seal ring is used for replacing a traditional seal ring with a circular section, the seal effect is met and the space is saved, so that the rolling needles can be lengthened and the bearing capacity of the bearing is improved.

Description

technical field [0001] The invention relates to the field of bearing processing and manufacturing, in particular to a full-needle needle roller bearing with a special-shaped sealing ring. Background technique [0002] In the bearing processing and manufacturing industry, sealing rings mainly include circular sealing rings, V-shaped sealing rings and rectangular sealing rings. [0003] A full-needle drawn outer ring needle roller bearing with sealing rings and gaskets needs to bear a large load and a narrow support surface due to the use conditions, so the needle rollers are required to be lengthened accordingly. Due to the limitation of the space used by the bearing, the total height of the bearing is limited, and the needle roller needs to be lengthened, so it is proposed to reduce the sealing ring to solve the problem, but due to the large radial dimension, the diameter of the sealing ring cannot be compressed in the radial direction. [0004] After analyzing the rectangu...

AI Technical Summary

Problems solved by technology

Due to the limitation of the space used by the bearing, the total height of the bearing is limited, and the needle roller needs to be lengthened, so it is proposed to solve the problem by reducing the sealing ring, but due to the large radial dimension, the diameter of the sealing ring cannot be compressed in the diameter direction

[0004] After analyzing the rectangular seal ring, although it can also play a sealing role, the contact surface between the rectangle and the shaft increases, and there is a large interference fit between the inner diameter of the seal ring and the shaft, and the outer diameter of the seal ring is rolled by the outer ring. Road limit, so that the entire interference is added to the shaft, resulting in increased damping when the shaft rotates, which will cause the shaft to heat up, reduce the service life of the shaft, and accelerate the aging of the seal ring to fail, so the rectangular seal ring is not suitable for full needles. Needle bearings

[0005] Although the circular sealing ring and the V-shaped sealing ring can better meet the sealing effect, their "o"-shaped cross-section and "V"-shaped cross-section cannot save space. In addition, the inner diameter of the V-shaped sealing ring has a large contact surface with the shaft. That is to say, the total height of the full-needle needle roller bearing cannot be limited, and the needle roller can be lengthened to increase its load-carrying capacity.

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