Saddle Vehicle Hub Sensor Rotor Mounting Structure
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Solution Overview
Problem
Conventional saddle riding type vehicles face high costs and weight issues due to the need for precise processing of the outer circumferential surface of the hub to achieve coaxiality for sensor rotor mounting, leading to increased weight and reduced strength from longer sensor stays.
Innovation Solution
A mounting structure that uses the inner circumferential surface of a through hole in the hub as a reference for the sensor rotor, reducing the need for processing the outer surface, allowing for a smaller diameter sensor rotor and shorter, stronger sensor stays, while a spacer can enhance coaxiality and prevent corrosion and dust entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the outer circumferential surface of the hub is processed to improve coaxiality for sensor rotor mounting, then the coaxiality accuracy is improved, but the manufacturing cost increases
Solution Approach 1:
Instead of processing the outer circumferential surface of the hub to achieve coaxiality, the patent inverts the approach by processing the inner circumferential surface of the through hole. The sensor rotor is then mounted on this processed inner surface, eliminating the need for expensive outer surface processing while maintaining high coaxiality accuracy.
Solution Approach 2:
The patent introduces a spacer as an intermediary component between the hub and the sensor rotor. The spacer is mounted on the processed inner surface of the through hole and provides a mounting surface for the sensor rotor, facilitating accurate coaxiality without requiring extensive processing of the hub's outer surface.
2Ease of manufacture
If the sensor rotor is mounted on the outer circumferential surface of the hub, then the mounting position is established, but the sensor rotor diameter increases leading to increased weight
Solution Approach 1:
The patent inverts the mounting location from the outer circumferential surface of the hub to the inner circumferential surface of the through hole. This allows the sensor rotor to be positioned closer to the center of the hub, reducing its diameter and consequently its weight, while still achieving accurate coaxiality through processing of the inner surface.
3Stability of the object's composition
If the sensor rotor diameter is increased for mounting on the hub outer surface, then the mounting stability is improved, but the stay length increases reducing strength
Solution Approach 1:
By inverting the mounting location to the inner circumferential surface of the through hole, the patent reduces the sensor rotor diameter. This shortens the stay length required for mounting the wheel speed sensor, thereby improving stay strength while maintaining mounting stability through the precisely processed inner surface and spacer assembly.
Data Source
AI summary
A saddle riding type vehicle driven by a straddling rider, comprises a wheel including a wheel member having an annular rim, and a hub formed centrally of the rim to have a through hole formed at a center of rotation, a bearing attached to an inner circumferential surface of the through hole, and a tire attached to the rim; a wheel support for rotatably supporting the wheel with an axle inserted in the through hole; a sensor rotor mounted on the hub using the inner circumferential surface of the through hole as reference; and a wheel speed sensor for detecting rotation of the sensor rotor.