Bearing Retaining Lid With Ceramic Layer for Wireless Data Transfer
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Solution Overview
Problem
Existing bearing apparatuses with wireless communication functions face interference issues due to the need for spaces to facilitate radio wave propagation, which can compromise housing accuracy and increase costs.
Innovation Solution
A bearing apparatus with a non-metallic layer made of ceramic or other non-metallic materials in contact with the housing, allowing wireless data transmission without requiring additional space for radio wave propagation, and incorporating a self-generation power source for the communication apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a space (hole or groove) is provided in the housing to facilitate radio wave propagation, then wireless communication is enabled, but manufacturing precision and housing accuracy deteriorate
Solution Approach 1:
A non-metallic layer is introduced as an intermediary component between the metal housing and the wireless sensor. This layer allows radio waves to pass through while maintaining the integrity and accuracy of the metal housing, thus enabling wireless communication without compromising manufacturing precision.
Solution Approach 2:
The housing structure is made composite by combining metal material with a non-metallic layer. The metal portion maintains structural accuracy while the non-metallic layer provides radio wave permeability, resolving the contradiction between communication function and manufacturing precision.
2Reliability
If a space is provided in the housing for radio wave propagation, then wireless communication is enabled, but device complexity and cost increase
Solution Approach 1:
The non-metallic layer serves as a simple intermediary that enables wireless communication without requiring complex structural modifications to the housing. This maintains device simplicity while achieving the communication function.
3Reliability
If electrical wires are used for data transmission, then reliable data transmission is achieved, but ease of assembly deteriorates and productivity decreases
Solution Approach 1:
The mechanical connection system (electrical wires) is replaced with an electromagnetic field-based wireless communication system. This substitution eliminates the need for physical wire connections, thereby improving assembly efficiency while maintaining data transmission reliability.
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
Enables wireless data transmission to the outside without compromising housing accuracy or increasing costs by using non-metallic layers and a self-generation power source, thus avoiding the need for additional space within the housing.
Implementation Method 1
a non-metallic layer composed of a non-metallic material is formed in at least one of a portion of the lid portion in contact with the housing, a portion of the housing in contact with the lid portion, an inside portion of the lid portion, and a member arranged between an inside surface of the lid portion and an outside surface of the rotating body
Data Source
AI summary
A bearing apparatus includes a housing where a main spindle is accommodated, a bearing including an inner ring and an outer ring, the bearing supporting the main spindle rotatably with respect to the housing, a retaining lid fitted to an inside surface of the housing while the retaining lid is in contact with an axial end surface of the housing and an axial end surface of the outer ring, and a communication module arranged in a region opposed to the retaining lid with the bearing being interposed, the communication module wirelessly communicating over electromagnetic waves. In a portion of the retaining lid in contact with the housing, a non-metallic layer composed of ceramic which is a non-metallic material is provided.