Method and device for determining optimal pretension quantity of sphere and cone mixed double-line hub bearing

Abstract

The invention relates to a method and a device for determining the optimal pretension quantity of a sphere and cone mixed double-line hub bearing, and belongs to the technical field of bearing design. The method comprises the steps: formulating a load spectrum of a sphere and cone mixed double-line hub bearing unit; calculating radial displacement delta r, axial displacement delta a and angle displacement theta according to a mechanical model of the sphere and cone mixed double-line hub bearing; obtaining corresponding single-line ferrule life and comprehensive life of the hub bearing unit by taking the load spectrum as a known condition and pretension quantity as analysis variable; and establishing a relationship between the pretension quantity and the life of the hub bearing unit and taking the pretension quantity, corresponding to the longest life of the single-line ferrule of the hub bearing unit and / or the whole hub bearing unit, as the optimal pretension quantity. By the method for determining the optimal pretension quantity of the sphere and cone mixed double-line hub bearing based on the load spectrum, which is provided by the invention, the optimal pretension quantity of the sphere and cone mixed double-line hub bearing unit during assembling can be obtained accurately.

Description

technical field [0001] The invention relates to a method and a device for determining the optimal preload of a ball-cone mixed double-row hub bearing, belonging to the technical field of bearing design. Background technique [0002] The wheel hub bearing unit is one of the most critical parts in the car. It is a part used to bear the load at the axle of the car and provide precise guidance for the rotation of the wheel hub. It generally adopts a double-row structure. There are currently two types of hub bearing units for mainstream vehicles: double row angular contact ball hub bearing units and double row tapered roller hub bearing units. Under the background that domestic automobile manufacturing tends to improve comfort, multi-functionality and strive to expand the interior space of the automobile, the weight of household automobiles increases accordingly, and thus has higher requirements for the bearing capacity of wheel hub bearings, a new type of wheel hub bearings has ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method and device for determining the optimal preload of a ball-cone hybrid double-row hub bearing, so as to solve the problem that it is difficult to accurately determine the optimal preload during the assembly process of a ball-cone hybrid double-row hub shaft

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