Motorcycle Handlebar Lever Restraint Mechanism
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Solution Overview
Problem
Existing solutions for restraining clutch and brake levers on motorcycles are often complex, require modification of the levers, or are inconvenient to use, leading to rider fatigue and safety issues during extended periods of idling, such as at stop lights.
Innovation Solution
A lever restraint device that includes a clamp for the handlebar, a slider mechanism with a thumb lever and catch that can be easily installed and used to hold the clutch or brake lever in a retracted position without modifying the existing lever hardware, utilizing a spring or electro-mechanical means for reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rider maintains pressure on the clutch lever to keep it disengaged during extended periods at idle positions, then the clutch remains disengaged and ready for quick departure, but the rider experiences hand strain and fatigue
Solution Approach 1:
The clutch lever restraint device enables the clutch lever to maintain its disengaged position autonomously without requiring continuous rider input. The device mechanically holds the lever in place, allowing the rider to release their hand while the clutch remains reliably disengaged, thus eliminating hand strain while maintaining operational reliability.
2Productivity
If the rider shifts into first gear and maintains clutch disengagement to avoid weight shifting, then the motorcycle is ready for quick departure, but the rider loses use of their left foot for balancing
Solution Approach 1:
The restraint device allows the clutch lever to maintain its disengaged position independently, enabling the rider to remain in neutral gear while keeping the clutch ready for quick departure. This eliminates the need to shift into first gear, thereby preserving the rider's left foot for balancing while maintaining departure readiness.
3Ease of operation
If prior art devices are used to restrain the clutch lever, then the rider's hand is relieved of strain, but the devices are overly complex or require modification of the clutch mechanism
Solution Approach 1:
The restraint device is designed as a separate, modular component that attaches to the handlebar independently of the clutch mechanism. This segmentation allows the device to provide hand relief without requiring complex integration with or modification of the existing clutch system, thereby reducing overall system complexity while maintaining operational benefit.
Solution Approach 2:
The restraint device acts as an intermediary mechanism between the rider's hand and the clutch lever. It provides the restraining function without directly modifying the clutch mechanism, serving as a mediating component that simplifies the overall system architecture while achieving the desired hand relief effect.
4Ease of operation
If the clutch lever restraint device is engaged, then the clutch lever is held in disengaged position and hand strain is reduced, but the device must not interfere with normal clutch operation when the rider needs to engage the clutch
Solution Approach 1:
The restraint device incorporates a release mechanism that allows the rider to dynamically switch between restrained and free states. When the rider needs to engage the clutch, they can easily release the restraint, allowing the lever to move freely. This dynamic capability ensures the device adapts to different operational needs, maintaining both hand strain reduction and clutch operation flexibility.
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
The device allows riders to release the clutch or brake lever, reducing hand strain and improving safety by maintaining the lever in a disengaged position, enabling quicker acceleration and easier handling of the motorcycle, while being easy to install and use without interfering with normal operations.
Implementation Method 1
Both the clutch and the brake levers are typically biased towards an extended position
Implementation Method 2
a thumb lever connected to a lever catch
Data Source
AI summary
On a motorized vehicle with handlebars and handlebar mounted levers, a device includes a collar or clamp on which a thumb lever and catch slide in a groove to a desired position and are restrained by a notch, detent, slot, or other disruption in the groove to retain a handlebar lever in a desired position. Preferably, the thumb and catch are biased toward a disengaged position by a spring, by gravity, or by electro mechanical means. Spacers, additions, and handlebar extensions can all be provided with the device to allow for installation on a variety of handlebar sizes. In another embodiment, the thumb lever pivots about an axis generally perpendicular from the handlebar axis between a disengaged positon where the catch is clear from the clutch or brake lever and an engaged position where the catch engages the clutch or brake lever and holds it in a retracted position.