Wheel Bearing Seal Positioning for Interference Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The interference of the axial lip in wheel bearing device seals is difficult to set appropriately due to variations caused by the position of the seal and lip contact surface, affecting both sealing performance and rotational resistance.
Innovation Solution
A manufacturing method and apparatus that precisely position the seal and lip contact surface using reference positions on the outer and inner ring members, ensuring the axial lip contacts the lip contact surface with optimal interference, thereby maintaining appropriate sealing performance and reducing rotational resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the interference of the axial lip is increased to improve sealing performance, then the sealing performance is improved, but the resistance against rotation of the inner shaft member increases
Solution Approach 1:
The patent precisely controls the interference parameter between the axial lip and lip contact surface by managing the axial position of the seal relative to the outer ring member and the axial position of the lip contact surface on the inner shaft member. This parameter control ensures the interference is within an appropriate range that provides sealing performance while limiting rotational resistance.
2Ease of manufacture
If the position of the seal and lip contact surface is not accurately controlled, then the manufacturing process is simpler, but the interference of the axial lip cannot be set appropriately
Solution Approach 1:
The patent replaces complex mechanical positioning adjustments with a management system that controls the axial positions during processing. By managing the distance in the axial direction from reference positions on the outer ring member and inner shaft member, the system achieves precise interference control without requiring complex mechanical positioning mechanisms.
Data Source
AI summary
A manufacturing method of a wheel bearing device, the wheel bearing device including an outer ring member, an inner shaft member that includes a shaft portion that has an inside raceway and a flange portion, a plurality of rolling elements, a seal provided at an end portion of the outer ring member on the first axial side and including an axial lip, and a lip contact surface provided on the side of the inner shaft member and contacted by the axial lip, includes: processing the outside raceway with a distance in an axial direction from a first reference position being managed, a first reference position being set on the outer ring member; and providing the seal at a predetermined position, in the axial direction, of the outer ring member with respect to the first reference position.