Integrated Handlebar Stop in Head Tube for Steering Torque Control
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Solution Overview
Problem
Existing stop designs for handlebars of two- and three-wheeled vehicles are limited by the increasing integration of switching and supply lines in the upper control head bearing, making it difficult to install steering stops in vehicles with rolling bearings pressed directly into the head tube, and they do not effectively transmit the required torque without impairing functional steering.
Innovation Solution
A fully integrated handlebar stop within the head tube of the vehicle, utilizing a lower control head bearing with a base connected to the fork and a bearing shell connected to the frame, featuring a circular groove and stop element that transmits 60 Nm torque, and includes elastic elements to absorb impact and prevent metallic noise, ensuring secure and non-positive-locking connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the upper control head bearing region is used for integrating switching and supply lines, then functional integration is improved, but installation space for steering stops deteriorates
Solution Approach 1:
The invention relocates the steering stop from the upper control head bearing region to the lower control head bearing region, effectively utilizing the vertical dimension of the head tube. This dimensional transition allows the stop to be positioned where sufficient space exists, while the upper region remains dedicated to electrical integration, thereby resolving the spatial conflict between these two functional requirements.
2Adaptability or versatility
If a bearing shell firmly connected to the head tube is used, then steering stop installation is enabled for 80% of vehicles, but compatibility with the remaining 20% of vehicles deteriorates
Solution Approach 1:
The lower control head bearing design with a base and bearing shell creates a universal mounting structure that accommodates both vehicle types. The bearing shell can be firmly connected for vehicles requiring secure mounting, while the same structural configuration works for vehicles with pressed-in bearings. This multi-functional design allows the steering stop to be installed across 100% of vehicle variants without requiring different installation methods.
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 allows for universal application across all handlebar installations, maintains functional integration, and effectively transmits torque without impairing steering, while reducing noise and increasing the service life of the stop by using elastic elements to absorb impact.
Implementation Method 1
an elastic part, which absorbs the impact of the base on the stop element in an attenuating manner
Implementation Method 2
a spring arranged on the lower end face of the cover of the control head bearing facing the rolling bearing engages in a positive-locking manner
Data Source
AI summary
A stop for handlebars of two-wheeled vehicles is integrated into the control head bearing of the vehicle. It is formed by a first component installed in the control head bearing with a circular arc-shaped groove that is arranged coaxially to the rotational axis of the control head bearing and a stop element protruding into this groove. The stop element is arranged on a second component that can be moved relative to the first part. The stop at the lower control head bearing is arranged within the head tube. The circular arc-shaped groove is arranged in the base and open towards the lower bearing shell. The lower bearing shell comprises an open recess extending over its height to the lower rolling bearing, which receives a stop element. The stop element has a radial lug protruding into the circular groove of the base.