Bearing device for wheel, and axle module
A bearing device and wheel technology, applied to bearings, axles, wheels, etc., can solve the problems of poor management of parts, deterioration of operability, and large number of parts, and achieve the effect of preventing friction and damage
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[0283] The relationship between the hardness difference between the convex portion 35 and the concave portion formation portion and the press-fitting load was investigated, and the results are shown in Figure 31 . In this case, a male spline having a modulus of 0.48 and a number of teeth of 59 is formed on the shaft portion 12 , and the male spline is pressed into the hole portion 22 of the hub wheel 1 . In addition, the diameter difference between the outer diameter of the shaft portion 12 and the inner diameter of the hole portion 22 of the hub ring 1 is Δd, and the height of the convex portion is H. When the ratio is Δd / 2h, 0.3<Δd / 2h< 0.86.
[0284] According to the Figure 31 It can be seen that when the difference in hardness is less than 20HRC, the indentation load is large and so-called cracking occurs.
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