Motorcycle Handlebar Mount Vibration Isolation
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Solution Overview
Problem
Existing handlebar mount structures for motorcycles fail to effectively suppress vibrations from the vehicle frame, leading to shaking of the handlebar, and rubber mounts can cause instability.
Innovation Solution
A handlebar mount structure that incorporates a tubular elastic mount member between the handlebar holder and the upper bracket, with additional elastic members and rubber washers to absorb and isolate vibrations, and a holder shank with a male thread for secure attachment, stabilizing the handlebar and preventing tottering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rubber mount is employed to support the handlebar, then transmission of vibrations between the upper bracket and the handlebar is suppressed, but the handlebar may be shaken in longitudinal and widthwise directions due to the elasticity of the rubber mount
Solution Approach 1:
The single rubber mount is divided into multiple rubber mounts (first rubber mount, second rubber mount, third rubber mount, fourth rubber mount) positioned at different locations. This segmentation distributes the vibration isolation function across multiple points while maintaining handlebar stability through the coordinated action of all mounts.
Solution Approach 2:
Multiple rubber mounts are combined to work together as a unified vibration isolation system. The first and second rubber mounts work with the third and fourth rubber mounts to simultaneously suppress vibrations and prevent handlebar shaking in multiple directions.
2Stability of the object's composition
If multiple rubber mounts are used to suppress handlebar shaking, then handlebar stability is improved, but the complexity of the mounting structure increases
Solution Approach 1:
Each rubber mount serves multiple functions: isolating vibrations, preventing handlebar shaking, and providing structural support. The upper bracket and handlebar holder are designed with integrated features that accommodate multiple mounts while maintaining a relatively simple overall structure.
3Stability of the object's composition
If elastic members are interposed forwardly and rearwardly of the elastic mount member, then tottering of the handlebar is suppressed, but the number of components and assembly complexity increases
Solution Approach 1:
Elastic members are strategically positioned only at specific locations (forwardly and rearwardly of the elastic mount member) where they are most needed to suppress handlebar tottering. This localized approach provides stability without requiring elastic members throughout the entire structure.
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 structure effectively suppresses vibration transmission to the handlebar, reduces instability, and enhances assembly by using elastic members and rubber washers to absorb and distribute forces, ensuring a stable and secure mounting system.
Implementation Method 1
a tubular elastic mount member inserted in the holder shank throughhole to suppress transmission of vibrations between the upper bracket and the handlebar holder
Implementation Method 2
the use of the elastic mount member may appear to possibly result in tottering of the handlebar holder
Implementation Method 3
the interposition of the elastic member forwardly and rearwardly of the elastic rubber mount members is effective to suppress such a tottering of the handlebar
Implementation Method 4
a rubber washer mounted on an outer periphery of the elastic mount member and disposed between the handlebar holder and the upper bracket
Implementation Method 5
by the cumulative effect of the elastic members and the rubber washers, the tottering of the handlebar can be further suppressed
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A handlebar (10) is supported by an upper bracket (6) of a motorcycle through a handlebar holder (9). The handlebar holder (9) includes a lower end portion supported by the upper bracket (6) and an upper end portion to support the handlebar (10). A holder shank (38) is provided in a lower end of the handlebar holder (9), and has a tip end portion formed with a male thread. A holder shank throughhole (36) is formed in the upper bracket (6), through which throughhole (36) the holder shank (38) extends. The holder shank throughhole (36) accommodates therein a tubular elastic mount member (42) for suppressing transmission of vibrations. The holder shank (38) is passed through a holder shank insertion hole (44) formed on an inner side of the elastic mount member (42), and an elastic member (60) is interposed forwardly and rearwardly of the elastic mount member (42) situated between the handlebar holder (9) and the upper bracket (6).