Straddled Vehicle Wheel Speed Sensor Bracket Positioning
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Solution Overview
Problem
Motorcycles equipped with ABS face challenges in protecting the wheel speed sensor from gravel and maintaining workability during attachment and detachment, as existing solutions either expose the sensor to gravel or complicate tool access.
Innovation Solution
A straddled vehicle design where the wheel speed sensor is mounted on the rear axle shaft, with a holder that moves in conjunction with the rear axle shaft, and a sensor fastening member with a tool-fitted portion, allowing the bracket to overlap with the sensor when gravel is a risk and exposing it when tools are needed, ensuring protection from gravel and easy tool access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wheel speed sensor is disposed close to the wheel, then the sensor can be positioned for optimal detection, but tools used for attachment and removal of the sensor may interfere with the bracket of the swingarm
Solution Approach 1:
The patent applies dynamics by making the sensor fastening member movable relative to the bracket. The fastening member can be positioned in different locations along the bracket, allowing it to move between a first position where it is exposed for tool access and a second position where it is protected by the bracket. This dynamic positioning resolves the contradiction between sensor detection optimization and attachment workability.
2Object-affected harmful factors
If the wheel speed sensor is disposed above the swingarm, then the sensor is guarded from gravel by the swingarm, but the sensor is farther from the wheel
Solution Approach 1:
The patent uses dynamics to allow the sensor fastening member to be positioned in different locations. When positioned in the first location, the sensor is closer to the wheel for optimal detection. When positioned in the second location, the sensor is farther from the wheel but protected by the bracket from gravel. This dynamic positioning allows the system to adapt to different operational requirements.
Solution Approach 2:
The bracket serves as an intermediary element between the sensor and the gravel. By positioning the sensor fastening member in the second position, the bracket acts as a protective barrier that shields the sensor from gravel while allowing the sensor to remain functional. This intermediary structure resolves the contradiction between sensor protection and detection capability.
3Adaptability or versatility
If a bracket extending upward from the swingarm is provided, then the bracket can support additional components, but tools may interfere with the bracket when attaching or removing the sensor
Solution Approach 1:
The patent applies dynamics by making the sensor fastening member movable along the bracket. This allows the fastening member to be positioned in a first location where it is exposed and accessible to tools, and a second location where it is protected by the bracket. The dynamic positioning capability resolves the interference issue while maintaining the bracket's structural support function.
Data Source
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AI summary
A straddled vehicle includes a supported body mounted on a bracket 41 of a swingarm 14, a chain adjuster 34 that is configured to adjust drive chain tension, and a sensor bolt B2 that is configured to fasten a wheel speed sensor 58 of an ABS to a holder 61. When a rear axle shaft 8 is in an overlapping position, the bracket 41 overlaps with at least a portion of the head portion B2h of the sensor bolt B2, and when the rear axle shaft 8 is in a non-overlapping position, the bracket 41 does not overlap with any portion of the head portion B2h of the sensor bolt B2.