Preload inspection method and assembly method for wheel bearing device

Abstract

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 (Delta P) based on a differential torque (Delta T) 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.

Description

technical field [0001] The invention relates to a preload inspection method and an assembly method of a wheel bearing device. Background technique [0002] Conventionally, there is known a wheel bearing device that rotatably supports a wheel in a suspension device of an automobile or the like. In the aforementioned bearing device for a wheel, a preload is applied between the rolling elements and the raceway ring constituting the bearing device. [0003] By applying preload to the bearing device, the rigidity of the bearing device can be increased, and vibration and noise can be suppressed. However, if an excessive preload is applied, it may cause an increase in rotational torque and a decrease in life. Therefore, it is important to confirm whether or not an appropriate preload is applied to the bearing device. [0004] As a method of confirming the preload applied to the bearing device, as disclosed in Patent Document 1, for example, the following preload measurement metho...

AI Technical Summary

Problems solved by technology

However, if an excessive preload is applied, it may cause an increase in rotational torque and a decrease in life. Therefore, it is important to confirm whether an appropriate preload is applied to the bearing unit.

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