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安装滚动轴承通常采用的结构是:在体壳两端用法兰和螺钉将轴承紧固,并施以一定的预紧力。这样,由于螺钉紧固力的作用,影响体壳上轴承孔的圆度,并使体壳向两侧张开,使两轴承孔的同轴度被破坏。作者经过多年实践后,提出了下面的改进结构,供读者参考。改进结构如附图所示,该结构能使体壳孔的精度不受任何影响,可保证轴承的旋转精度。图示为新结构用于万能外圆磨床的内圆磨具支架上。支承架3紧固在砂轮架上,由两个螺钉5将轴6与支承架固为一体。一对7510型单列圆锥滚子轴承的内环固定在轴6上,其外环装在磨架体壳2内,当件3翻下时,可供磨削工件内圆之用。件6为空心轴,长螺杆1贯通其
Rolling bearing assembly is usually used in the structure is: both ends of the shell with flanges and screws to tighten the bearings, and to impose a certain pre-tightening force. In this way, the fastening force of the screw affects the circularity of the bearing hole in the body shell and opens the body shell to both sides, so that the concentricity of the two bearing holes is destroyed. After many years of practice, the author proposes the following improved structure for readers’ reference. Improved structure As shown in the figure, the structure enables the body shell hole accuracy without any impact, to ensure the bearing rotation accuracy. Shown is a new construction for a universal cylindrical grinder universal cylindrical grinder bracket. The support frame 3 is fastened to the wheel frame, and the shaft 6 is fixed to the support frame by two screws 5. A pair of 7510 single row tapered roller bearings inner ring is fixed on the shaft 6, the outer ring mounted in the mill body shell 2, when the piece 3 is turned down, for grinding the inner circle of the workpiece. Piece 6 hollow shaft, long screw 1 through it