Twistable Motorcycle Throttle Grip with Internal Bowden Cables
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Solution Overview
Problem
Current internal Bowden cable throttle grips on motorcycles are unsafe due to potential throttle valve jamming issues, leading to a shift towards external double-cable setups that are aesthetically unpleasing and can damage paintwork, necessitating a redesign for safety and appearance.
Innovation Solution
A redesigned throttle grip with a new base body, twin screw mechanism, external Bowden cable tensioner, and improved assembly/maintenance features, incorporating external Bowden cables routed through the handlebars to ensure safety and aesthetics, while meeting TÜV specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external double-cable setups are used to ensure safety, then reliability is improved, but appearance and paintwork protection deteriorate
Solution Approach 1:
The patent implements internal routing of double Bowden cables within the throttle grip structure. The cables are nested inside the grip body and routed through the handlebars, concealing them from external view while maintaining the safety benefits of dual-cable configuration. This prevents the cables from contacting and damaging the tank paintwork.
Solution Approach 2:
The patent transitions from external cable routing to internal routing by changing the spatial dimension of cable placement. The cables are moved from the external surface level to the internal structural level, passing through the handlebars and within the grip body, thus achieving both safety and aesthetic protection.
2Shape
If internal Bowden cable routing is used to improve appearance, then aesthetic quality is improved, but reliability deteriorates due to throttle valve jamming risks
Solution Approach 1:
The patent divides the single internal cable system into two separate Bowden cables, each with independent routing paths through the handlebars. This segmentation allows the system to maintain the clean internal appearance while providing redundant safety paths that prevent jamming - if one cable encounters resistance, the other can still operate independently.
Solution Approach 2:
The dual-cable internal routing system serves multiple functions simultaneously: it maintains the aesthetic appearance of internal routing while providing the safety redundancy of dual cables. The system combines the visual benefits of internal routing with the functional benefits of external-style safety.
3Shape
If complex internal mechanisms are implemented to achieve hidden routing, then appearance is improved, but device complexity increases
Solution Approach 1:
The patent combines the routing functions of multiple cables through a unified internal pathway system. The double Bowden cables are routed together through the handlebars and concealed within the grip body, merging their paths to achieve a clean appearance while using the existing structural pathways to minimize additional complexity.
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 solution provides a safer, aesthetically pleasing, and easily maintainable throttle grip that ensures proper cable tension and prevents throttle valve jamming by converting rotary grip movement into axial movement, ensuring engine throttling control even if the throttle valve jams.
Implementation Method 1
the rollers/ball bearings (6) guided in the double guide grooves (12) and counter-rotating spiral grooves (13) convert this rotary movement into an axial movement of the sliders (3)
Implementation Method 2
the rollers/ball bearings (6) guided in the double guide grooves (12) and counter-rotating spiral grooves (13) convert this rotary movement into an axial movement of the sliders (3)
Data Source
Figure 1
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AI summary
The throttle grip has a guide tube (7) for passage of cables of steering wheel end turn signals. A receiving socket (5) has a center cable guide hole and an outer thread (14) for screwing the receiving socket having an internal thread (15) in the main portion (1). A cable tensioner is provided for setting of two Bowden cables. An end portion (2) for fixing of guide tube is located at the front portion of main portion. The Bowden cable bushings (17) and a counterbore (16) are provided for aligning and fixing the end portion in the main portion.