Combined bearing with shaft

Abstract

This invention belongs to a roller bearing. The combined bearing with the axis includes the external circle (1), the blocking circle (5), two full packed rollers (3), wherein the blocking circle (5) is at the twin side of the external circle(1), and the mandrel (2) is arranged in the external circle (1), the two full packed rollers are located between the mandrel (2) and the external circle (1), and the blocking circle (1) combines with the mandrel (2) excessively, and the a list of thrust steel balls (4) are arranged between the twin side blocking circle and the external circle separately. This invention can avoid the falling off, smashing, and bearing locking of the steel ball in the channel that comes from the not standard bearing dimension. The two lists of the steel balls can strengthen the axial thrust of the bearing. And it can lower the quenching hardness of the external circle and avoid chipping that comes form the too high external circle hardness. The mandrel has the oil adding channel to ensure that the lubricant can be oiled before being parched by the radiant heat..

Description

Technical field [0001] The invention belongs to a roller bearing, and mainly relates to a combined bearing with a shaft. Background technique [0002] Roller bearings with shafts are also called non-standard roller bearings, which are called rollers or forming sticks in the steel pipe industry, and are mainly used in spiral welded pipe machine tools. Spiral welded pipes are widely used in the transportation of natural gas, gas, heating, water and other infrastructure fields. The spiral welded pipes are rolled by roller bearings to bend the strip steel into a tubular shape, and then welded to shape. At present, the roller structures used at home and abroad are mostly the following three types: outer ring plus two rows of tapered roller bearings, flat retaining ring type double row full complement cylindrical roller bearings and flat retaining ring type roller needle roller bearings, the above There are certain problems in the three structures: the hardness requirements of th...

AI Technical Summary

Problems solved by technology

At present, the roller structures used at home and abroad are mostly the following three types: outer ring plus two rows of tapered roller bearings, flat retaining ring type double row full complement cylindrical roller bearings and flat retaining ring type roller needle roller bearings, the above There are certain problems in the three structures: the hardness requirements of the outer rings of the three kinds of bearings are high, and the high hardness may easily cause the outer ring to be broken; the size of the bearing seat is not standard, and the axial preload will Insufficient; the bearing adopts a rigid sealing ring, and the sealing is poor, and debris can easily enter the bearing, causing the bearing to lock

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