Conic-Truncated Shield Coupling for Hub Bearing Friction
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Solution Overview
Problem
The existing sealing assemblies for hub bearing units experience increased friction and potential damage due to axial movement of the rotating shield relative to the stationary ring, caused by wheel cornering, leading to high friction and interference issues.
Innovation Solution
A coupling system featuring a conic-truncated sleeve portion on the rotating shield that integrates with a conic-truncated mounting seat on the inner ring, providing a stable and low-friction connection through a tapering surface design that enhances axial locking and reduces radial dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional sealing assembly with L-shaped shields is used, then sealing function is provided, but axial movement of the rotating shield relative to the ring occurs due to flange deflection, increasing friction and causing interference
Solution Approach 1:
The coupling system transitions from a rigid fixed connection to a dynamic elastic connection. The shield is made of elastomeric material that can elastically deform to accommodate flange deflection during vehicle cornering, maintaining continuous contact with the ring while absorbing axial movements that would otherwise cause interference and high friction
Solution Approach 2:
The invention changes the material parameter of the shield from rigid to elastomeric, enabling elastic deformation. This material parameter change allows the shield to adapt to flange deflection-induced axial movements, maintaining sealing effectiveness while preventing harmful interference with the ring
2Object-affected harmful factors
If the shield is made stationary to reduce friction, then friction is reduced, but the shield cannot accommodate flange deflection and causes interference with the ring
Solution Approach 1:
The shield is designed as a dynamic elastic element rather than a static component. This elasticity enables the shield to move with the flange during cornering while maintaining its sealing function, preventing interference with the ring and protecting rolling bodies without requiring the shield to be completely stationary
3Manufacturing precision
If a rigid coupling system is used between shield and ring, then manufacturing precision is improved, but the system cannot accommodate flange deflection and causes high friction and damage
Solution Approach 1:
The invention changes the material parameter of the shield from rigid to elastomeric, enabling elastic deformation. This allows the coupling system to maintain manufacturing precision for proper fitting while accommodating operational deformations from flange deflection, preventing high friction and damage
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively minimizes axial and radial dimensions, reduces friction, and enhances protection of rolling bodies by maintaining a stable coupling between the shield and the ring, preventing damage and maintaining low friction even under stress conditions.
Implementation Method 1
The first shield (10) is made of an elastomeric material, so that the first sleeve portion (15) is elastically deformable at least towards the second end (22)
Data Source
Figure 1
Figure 2~3
AI summary
A sealing assembly (1) including at least one first annular shield (10) having a sleeve portion (15) integral in use with a rotating member (4) and a flange portion (16), which radially and overhangingly extends from the sleeve portion (15); preferably, a second annular shield (11) is arranged in front of the first shield with the interposition of an annular seal (9); wherein the sleeve portion of the first shield is delimited by a conic-truncated lateral mounting surface (21) having a tapering facing so as to have a greater diameter arranged on the side of the flange portion and intended to couple in use with a mounting seat of the rotating member formed by a shallow recess (25) delimited by a conic-truncated bottom wall (26) having the same tapering as the lateral mounting surface and by an axial shoulder (27) which is arranged on the side opposite to the flange portion.