Handlebar Stem Connection with Clamping Element
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Solution Overview
Problem
Existing handlebar stem connection mechanisms either require shortening the steerer tube to adjust the handlebar stem height or necessitate separate parts for pretensioning the steering bearings, limiting flexibility and ease of use.
Innovation Solution
A handlebar stem connection mechanism featuring a clamping element with an inclined contact surface and a fixing element, allowing the handlebar stem tube to be adjusted in length relative to the steerer tube without shortening it, and incorporating a fixing mechanism that maintains the clamping position, enabling easy height adjustment and pretensioning of steering bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the steerer tube is shortened to adjust the handlebar stem height, then the handlebar stem height can be changed, but it becomes impossible to reposition the handlebar stem upward
Solution Approach 1:
The invention divides the connection system into separate components: the handlebar stem tube with clamping element, and the steerer tube with contact surface. This segmentation allows the handlebar stem tube to be adjusted independently by changing its length or position, while the steerer tube remains intact and can accommodate multiple repositioning operations.
Solution Approach 2:
The clamping element is designed to be movable along the steerer tube's longitudinal axis, enabling dynamic adjustment of the handlebar stem height. The clamping element can be positioned at different locations on the steerer tube, allowing flexible repositioning without modifying the steerer tube itself.
2Reliability
If a clamping element with bevel is used to fix the handlebar stem, then the handlebar stem can be clampingly fixed, but separate parts are needed to pretension the steering bearings
Solution Approach 1:
The invention combines the clamping function and the steering bearing pretensioning function into a single integrated system. The clamping element not only secures the handlebar stem tube to the steerer tube but also serves to pretension the steering bearings through its interaction with the inclined contact surface on the steerer tube.
Solution Approach 2:
The clamping element is designed to perform multiple functions simultaneously: it provides clamping fixation for the handlebar stem tube, pretensions the steering bearings, and allows for height adjustment. This multi-functionality reduces the overall complexity by eliminating the need for separate pretensioning parts.
3Stability of the object's composition
If the handlebar stem tube surrounds the steerer tube entirely, then stable connection is achieved, but adjustment of the handlebar stem height becomes more complex
Solution Approach 1:
The connection system is segmented into the handlebar stem tube, the clamping element, and the steerer tube. This segmentation allows the clamping element to be independently adjusted along the steerer tube while maintaining the surrounding structure, enabling simple height adjustment without compromising connection stability.
Solution Approach 2:
The clamping element acts as an intermediary component between the handlebar stem tube and the steerer tube. It provides the adjustment mechanism while maintaining the stable connection, allowing height changes without requiring the handlebar stem tube to be completely removable or complex to adjust.
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
Enables simple and reliable connection between the handlebar stem and steerer tube, allowing for continuous height adjustment of the handlebar stem without shortening the steerer tube and facilitating pretensioning of steering bearings, enhancing user convenience and flexibility.
Implementation Method 1
The clamping element (38) has a clamping surface (42) that is in contact with the contact surface (40) of the steerer tube (18) in the mounted state
Data Source
AI summary
A handlebar stem connection mechanism for connecting a handlebar stem with a front wheel fork comprises a steerer tube connectible with the front wheel fork. Further, a handlebar stem tube connectible with the handlebar stem is provided, the handlebar stem tube surrounding the steerer tube. Using a clamping element arranged between the steerer tube and the handlebar stem tube, the steerer tube is clampingly connected with the handlebar stem tube. For fixing, in particular a screw is provided in the clamping element as the fixing element.