Lower Steering Head Bearing Stop for Universal Handlebar Mounting
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Solution Overview
Problem
Existing steering stop designs for two- and three-wheeled vehicles are not adaptable to all installation methods of roller bearings and often interfere with the integration of switching and supply lines in the upper steering head bearing, limiting their applicability and functionality.
Innovation Solution
A handlebar stop integrated into the control tube of the vehicle frame, where the lower steering head bearing consists of a base connected to the fork and a bearing shell connected to the head tube, with an arcuate groove and a stop element that transfers the required torque without protruding beyond the bearing shell, allowing for easy exchange and integration with various frame configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a steering stop is integrated into the upper steering head bearing, then the handlebar stop function is achieved, but it interferes with the integration of switching and supply lines in the upper steering head bearing
Solution Approach 1:
The invention relocates the stop element from the upper steering head bearing to the lower steering head bearing, utilizing the vertical dimension of the steering system. This dimensional shift allows the stop function to coexist with the electrical integration requirements of the upper bearing, resolving the conflict between mechanical safety function and electrical system compatibility.
2Reliability
If a steering stop design is used that requires a bearing shell firmly connected to the steering head tube, then the stop function is achieved, but it cannot be used on vehicles where the rolling bearing is pressed directly into the head tube
Solution Approach 1:
The invention designs the stop element to be integrated into the lower steering head bearing assembly that can accommodate both installation methods: vehicles with bearing shells and vehicles with direct pressed-in rolling bearings. The stop element is positioned and secured in a manner that works universally across different frame configurations, making the design applicable to approximately 100% of vehicle types rather than just 80%.
3Reliability
If the stop element protrudes beyond the bearing shell, then the stop function is achieved, but it creates interference with surrounding components and complicates the structure
Solution Approach 1:
The stop element is nested within the lower steering head bearing assembly, specifically positioned within the bearing shell or integrated with the base and rolling bearing. This nesting arrangement allows the stop function to be achieved without the element protruding beyond the bearing shell, maintaining a compact structure that integrates smoothly with surrounding components and reduces overall system 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 universal handlebar stop that meets legal torque requirements, is adaptable to different roller bearing installations, and does not compromise the integration of switching and supply lines, ensuring functional compatibility and durability by using elastic elements for impact damping and secure fastening.
Implementation Method 1
an elastic part that fills the space between the stop element and the bearing shell formed by the recesses, at least in the circumferential direction
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a stop for handlebars of two-wheeled vehicles, which is integrated into the steering head bearing of the vehicle. The stop is formed by a first component incorporated in the steering head bearing and having an arcuate groove arranged coaxially with respect to the axis of rotation of the steering head bearing, and a stop element (18) projecting into said groove. The stop element (18) is arranged on a second component movable relative to the first component. According to the invention, the stop is arranged on the lower steering head bearing, inside the steering tube (1), which comprises a base (4) co-rotationally connected to the fork of the vehicle, the lower rolling bearing (5) and a lower bearing shell (6). The lower bearing shell (6) encloses the base (4) and the lower rolling bearing (5) coaxially. The arcuate groove (15) is arranged in the base (4) and is open towards the lower bearing shell (6). The lower bearing shell (6) has a recess (17) extending over the height of the lower bearing shall and open towards the lower rolling bearing (5), which accommodates a stop element (18). The stop element (18) has a radial protrusion (19), which projects into the arcuate groove of the base (4).