Wheel Hub Slinger Assembly Axial Movement Control
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Solution Overview
Problem
In conventional wheel bearing assemblies, the seal lip is prone to corrosion and wear due to direct contact with foreign substances, and the slinger's axial movement can increase drag torque when external impacts occur, necessitating a solution to reduce slinger movement relative to the wheel hub.
Innovation Solution
A wheel hub and slinger assembly design featuring a tolerance compensation portion and a stopper on the wheel hub, with the slinger mounted such that its axially inward end portion is caught to the stopper, reducing axial movement and interference, and an extending portion contacts the flange surface to manage external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the seal lip is in direct contact with the flange surface to provide sealing, then sealing function is improved, but the seal lip is prone to corrosion and wear due to foreign substances
Solution Approach 1:
The slinger acts as an intermediary component between the seal lip and the flange surface. It prevents foreign substances from reaching the seal lip while maintaining the sealing function through contact between the seal lip and flange surface.
2Object-affected harmful factors
If a slinger is mounted to the flange surface to prevent seal lip wear, then protection of seal lip is improved, but the slinger may axially move under external impact, increasing interference and drag torque
Solution Approach 1:
A stopper is provided to preliminarily prevent the axial movement of the slinger before external impact occurs. This anti-action mechanism ensures the slinger remains in its proper position and prevents increased interference with the seal lip.
3Stability of the object's composition
If the slinger is prevented from axial movement by a stopper, then axial movement is reduced, but manufacturing tolerances require the stopper to be positioned longer from the flange
Solution Approach 1:
The stopper is designed with specific dimensional parameters (length and position) that are optimized to accommodate manufacturing tolerances while preventing axial movement of the slinger. The parameters are carefully selected to balance functionality and manufacturability.
Data Source
AI summary
A wheel hub and slinger assembly includes a wheel hub including a base surface, a tolerance compensation portion extending from the base surface and formed to be concave in an axially outward direction, and a flange surface extending from the tolerance compensation portion in a radially outward direction, and a slinger including a mounting portion having an axially inward end portion and a first inner peripheral surface and configured to be press-fitted to the base surface, a bent portion having a second inner peripheral surface spaced apart from the tolerance compensation portion and extending from the mounting portion in a curved surface shape, and an extending portion extending from the bend portion and having a contact surface in contact with the flange surface in the radially outward direction. A stopper having an axially outward end portion surface and a radially outward end portion surface is formed on the wheel hub.