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# Needle roller bearing structure and form

by：Waxing     2020-05-24
Rolling bearing ( Hereinafter referred to as the bearing) Generally by the ring ( Inner ring and outer ring) Or of raceway and rolling element and cage ( FIG. 1) 。 Between inner ring and outer ring is equipped with a number of roller, the cage to keep them in order to avoid contact with each other at regular intervals, and thus for the smooth scrolling. The number of columns, according to the rolling element bearing can be divided into single row, double row and column ( Three columns, four columns, etc. ) 。 Rolling bearing ( Hereinafter referred to as the bearing) Generally by the ring ( Inner ring and outer ring) Or of raceway and rolling element and cage ( FIG. 1) 。 Between inner ring and outer ring is equipped with a number of roller, the cage to keep them in order to avoid contact with each other at regular intervals, and thus for the smooth scrolling. The number of columns, according to the rolling element bearing can be divided into single row, double row and column ( Three columns, four columns, etc. ) 。 Ring ( Inner ring and outer ring) And part of the raceway ring on the ring rolling roller called race, its surface as the raceway surface. Ball bearing ring raceway is called channel. Generally speaking, the ring of the inner ring and outer ring with shaft and the shell respectively. Thrust bearing ring as the raceway ring, inner ring and outer ring, respectively called axial ring and seat. Divided into two major categories of ball and roller roller roller, roller according to its shape and various forms. Ball long cylindrical roller roller needle tapered roller spherical roller ( Lw≤3 dw) ( 3 Dw < Lw < 10 Dw, Dw > 5毫米) ( 3 Dw < Lw < 10 Dw, Dw≤5毫米) Lw: roller length ( mm) Dw: roller diameter ( mm) Maintains a cage will be surrounded by rolling body parts, keep some intervals in the circumferential direction. Cage has punching cage, cage cage, forming and cutting pin type cage, etc. With no cage type full ball ( Roller) Bearing, compared with a cage bearing small friction resistance, suitable for high speed rotary type bearing to bear load ACTS on the ring, Race lap) Between the rolling element load direction and perpendicular to the plane of the bearing axis as the contact Angle formed by the point of view, expressed in alpha. Bearing according to the contact Angle ( α) Different, mainly divided into the following two categories: the centripetal bearing ( 00≤α≤450) ) 。 。 。 。 。 。 Mainly bear radial load bearing ( 450年<α≤900) ) 。 。 。 。 。 。 Mainly bear axial load
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