Wheel Bearing Sensor Target Axial Mounting for Axle Tube Structures
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Solution Overview
Problem
Conventional wheel bearing structures face difficulties in mounting wheel speed sensors on vehicles with axle tube type power transmission structures, limiting the application of third-generation wheel bearing designs and affecting productivity and sensing accuracy.
Innovation Solution
A wheel bearing design featuring a sensor target with an annular plate portion and a cylindrical portion on the wheel mounting flange, incorporating blank portions and bolt insertion holes to securely mount the sensor target without additional structures, preventing deformation and enhancing assembly ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional sensor target mounting structure is used on vehicles with axle tube type power transmission structures, then the wheel speed sensor cannot be properly mounted, but this limits the application of third-generation wheel bearing designs and reduces productivity
Solution Approach 1:
The sensor target is relocated from the traditional radial mounting position to the axial end surface of the wheel mounting flange. This dimensional change allows the sensor target to be mounted in a location that is accessible even in axle tube type power transmission structures where radial space is constrained, thereby enabling both third-generation wheel bearing design and proper sensor target mounting
Solution Approach 2:
The axial end surface of the wheel mounting flange is utilized as a mounting surface for the sensor target, making this surface serve dual purposes: structural support for the wheel and mounting surface for the sensor target. This multi-functional use of the flange structure enables universal application across different vehicle power transmission structures
2Productivity
If the sensor target is mounted on the rotating element without additional structures, then productivity is improved, but the sensor target may deform affecting sensing accuracy
Solution Approach 1:
The sensor target is designed with non-uniform thickness, having a first thickness in the region where bolt insertion holes are located and a second thickness in the target portion region. This local quality variation allows the target portion to maintain its shape and sensing accuracy while the bolt insertion holes provide secure mounting without additional structures
3Measurement precision
If the sensor target includes blank portions with penetrated structures, then the target portion is protected from deformation, but the structure becomes more complex
Solution Approach 1:
The sensor target is segmented into distinct functional regions: a target portion with specific thickness for sensing, bolt insertion holes for mounting, and blank portions with penetrated structures positioned between them. This segmentation allows each region to perform its specific function independently, protecting the target portion from deformation while maintaining manufacturing feasibility
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 easy mounting of wheel speed sensors on vehicles with axle tube type power transmission structures, allowing for the application of third-generation wheel bearing designs, improving productivity, and maintaining sensing accuracy by preventing target deformation.
Implementation Method 1
the wheel speed sensor is disposed adjacent to a sensor target (for example, a tonewheel, an encoder, or the like) mounted to the rotating element of the wheel bearing so as to sense a change in magnetic field generated by rotation of the sensor target and measure the rotational speed of the wheel
Data Source
AI summary
A wheel bearing includes a rotating element to which the wheel of the vehicle is mounted and configured to rotate together with the wheel of the vehicle; a non-rotating element fixed to the vehicle body; and one or more rolling elements provided between the rotating element and the non-rotating element and configured to rotatably support the rotating element relative to the non-rotating element. The rotating element includes a wheel mounting flange, and a sensor target used to measure a rotational speed of the wheel is provided on an axial end surface of the wheel mounting flange. The sensor target includes an annular plate portion configured to be mounted to the axial end surface of the wheel mounting flange, and the annular plate portion includes a target portion used for measuring the rotational speed of the wheel and at least one bolt insertion hole.