Windshield Screen Positioning With Axially Movable Fitting Parts
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Solution Overview
Problem
Existing windshield devices for saddle-ride vehicles face issues with manufacturing errors or deformations leading to unstable screen positioning due to misalignment of engagement holes, causing rattling and inability to maintain the screen's position.
Innovation Solution
A windshield device with a shaft movably inserted in guide holes, featuring movable fitting parts that can fit into lock holes, ensuring stable positioning by allowing adjustment even with manufacturing errors or deformations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid lock mechanism with fixed engagement holes is used, then the structure is simple and easy to manufacture, but manufacturing errors or deformations cause misalignment between gears and engagement holes, leading to rattling and unstable screen positioning
Solution Approach 1:
The patent applies the dynamics principle by making the engagement holes movable rather than fixed. The left and right engagement holes are configured to be movable relative to the fixing member within a predetermined range, allowing them to automatically adjust their positions to match the gear positions even when manufacturing errors or deformations occur. This dynamic adjustment capability ensures reliable engagement and stable screen positioning without requiring overly precise manufacturing tolerances.
Solution Approach 2:
The patent implements parameter changes by allowing the engagement holes to change their positional parameters dynamically. The holes can shift their location within a predetermined range in response to manufacturing variations or deformations, thereby maintaining proper alignment with the gears. This parameter adaptability resolves the contradiction between simple fixed structures and the need for reliable positioning under manufacturing tolerances.
2Manufacturing precision
If multiple adjustment parameters are introduced to compensate for manufacturing errors, then positioning accuracy improves, but the device complexity increases
Solution Approach 1:
The patent applies the self-service principle by enabling the engagement holes to automatically adjust their own positions without requiring external control mechanisms or complex adjustment systems. The holes simply move within their predetermined ranges to achieve proper alignment with the gears, compensating for manufacturing errors autonomously. This self-adjusting capability achieves high engagement alignment precision while avoiding the complexity of active control systems.
Data Source
AI summary
A windshield device includes: a fixing member configured to be fixed to a vehicle body and having first and second guide holes that are laterally spaced from each other; a shaft extending laterally and movably inserted in the first guide hole and the second guide hole; a holding member supported on the shaft; and a screen supported by the holding member. The first guide hole is provided with multiple first lock holes, and the second guide hole is provided with multiple second lock holes at positions laterally corresponding to the first lock holes. A first fitting part that can be selectively fitted in one of the first lock holes is fixed to the shaft, and a second fitting part that can be selectively fitted in one of the second lock holes is supported on the shaft to be movable in an axial direction of the shaft within a predetermined range.