Rotary Drive Sealing via Embedded Coating
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Solution Overview
Problem
Existing drive systems for motor vehicle wheels face challenges in ensuring reliable, simple, and cost-effective sealing at the interface between the gear means of the rolling bearing and transmission bowl, with current methods requiring complex assembly, high costs, and limited compatibility with various rolling bearings.
Innovation Solution
A drive system with a coating interposed between the geometric means of the rotating member and transmission bowl, which becomes embedded at the interface to ensure sealing, featuring complementary male and female patterns and a sealing bead for reliable torque transmission and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal is arranged around the geometric means by overmoulding with a groove, then sealing at the interface is ensured, but the assembly becomes complex and costs increase
Solution Approach 1:
The sealing function is extracted from the complex overmoulded seal with groove and transferred to a simple coating applied directly on the geometric means. This eliminates the need for groove formation and complex seal assembly operations, reducing assembly complexity while maintaining sealing reliability.
Solution Approach 2:
The coating acts as a simple, inexpensive sealing element that can be applied directly to the geometric means. It replaces the expensive and complex overmoulded seal, providing effective sealing at lower cost and with simpler assembly procedures.
2Reliability
If a groove is formed for seal assembly, then sealing interface is created, but manufacturing costs increase significantly
Solution Approach 1:
The expensive groove formation operation is extracted and eliminated. The sealing interface is created directly on the existing geometric means surface through coating application, which is much less costly than machining grooves and assembling complex seals.
Solution Approach 2:
The coating provides an inexpensive sealing solution compared to the expensive overmoulded seal with groove. The coating can be applied using simple, low-cost processes while achieving the required sealing capability.
3Reliability
If a seal of certain size is used, then sealing is provided, but handling and packaging become difficult
Solution Approach 1:
The large, difficult-to-handle seal component is extracted and replaced by a thin coating that can be easily applied and handled. The coating conforms to the geometry of the means without requiring complex handling or special packaging.
4Reliability
If a flange of suitable diameter is provided, then seal compatibility is ensured, but adaptability to various rolling bearings is limited
Solution Approach 1:
The coating-based sealing solution is universal and can be applied to various geometric means regardless of the specific rolling bearing type or flange diameter. This eliminates the limitation of seal compatibility and allows the same sealing approach to work across different bearing categories.
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 provides a reliable, simple, and cost-effective sealing mechanism that ensures proper assembly and compatibility with various rolling bearings, enhancing the service life and reducing assembly complexity while maintaining effective torque transmission.
Implementation Method 1
said coating being arranged to, on the axial nesting stroke, become embedded at the interface of said geometric means in order to ensure sealing at said interface
Data Source
Figure 1a~1b
Figure 2~3
AI summary
The invention relates to a system for rotating a wheel of a motor vehicle, said system comprising a bearing having a rotating member (1) mounted for rotation relative to a fixed member by means of at least one row of rolling elements, said rotating member comprising means for attaching the wheel, and said system comprising a transmission bowl for transmitting a motor torque to said rotating member, said system further comprising a gear structure having geometric means (5) respectively fixed to the rotating member (1) and the transmission bowl, said geometric means being arranged to interlock on an axial stroke to ensure the transmission of said motor torque, said system comprising a coating (6) which is interposed between the geometric means (5), said coating being arranged to, on the axial interlocking stroke,to become embedded at the interface of said geometric means in order to ensure sealing at said interface.