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公开(公告)号：EP4043744A1
公开(公告)日：2022-08-17
申请号：EP20868487.8
申请日：2020-08-28
申请人： NTN Corporation
发明人： TAKUBO, Takayasu , OBATA, Takuya , OWADA, Takayuki
摘要： Provided is a preload inspection method with which a preload value can be calculated more accurately. Furthermore, provided is a preload inspection method with which a pass/fail with regard to a preload state can be determined more accurately. The preload inspection method for a wheel bearing device (1) provided with an outer member (2) having an outside raceway surface (2c/2d), an inner member (3) having an inside raceway surface (3c/3d), and rolling bodies (4/5), is provided with: a power calculation step (S5) in which the outer member (2) or the inner member (3) is rotated in a relative manner and the power (P) is calculated; a preload value calculation step (S6) in which a preload value (F2) is calculated on the basis of the power (P) calculated in the power calculation step (S5); and a pass/fail determination step (S7) in which a pass/fail determination is made on the basis of whether the preload value (F2) calculated in the preload value calculation step (S6) is within a permissible range (R).
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公开(公告)号：EP3936847A1
公开(公告)日：2022-01-12
申请号：EP20766480.6
申请日：2020-02-28
申请人： NTN Corporation
摘要： Provided is a preload inspection method for a wheel bearing device enabling more accurate checking of preload. The invention comprises: a press-fitting step S02 for press-fitting an inner ring 4 to a small-diameter stepped part 3a; a first bearing preload value calculation step S03 for calculating a first bearing preload value P1 on the basis of a first axial direction negative clearance G1; a first rotating torque measurement step S05 for measuring a first rotating torque Ta after the press-fitting step; a swaging step S06 for swaging the small-diameter stepped part to the inner ring after the first rotating torque measurement step; a second bearing preload value calculation step S07 for calculating a second bearing preload value P2 on the basis of a second axial direction negative clearance G2; a second rotating torque measurement step S08 for measuring a second rotating torque Tb after the swaging step; a third bearing preload value calculation step S09 for calculating a third bearing preload value P3 by adding, to the first bearing preload value, a preload change amount ΔP based on a differential torque ΔT between the first rotating torque and the second rotating torque; and a determination step S10 for determining the suitability of the preload from the second bearing preload value and the third bearing preload value.
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