Motorcycle Seat Hammock Suspension Bracket Pre-Tensioning
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Solution Overview
Problem
Existing motorcycle seat assemblies with hammock-type load-bearing fabric or mesh suspensions require complex assembly processes and tools for pre-tensioning, and they often lack the ability to accommodate adjustable and removable backrests, which can compromise comfort and ease of assembly.
Innovation Solution
A motorcycle seat assembly featuring an elongate fore-aft extending seat suspension mounting and support bracket that serves as a pan-reinforcing backbone, facilitating easier assembly and pre-tensioning of the hammock-type load-bearing fabric or mesh suspension without the need for lever-action tools, while also allowing for the integration of an adjustable and removable backrest.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lever-type suspension mounting tool is used to pre-tension the webbing, then the webbing can be sufficiently taut to handle loading and accelerations, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The suspension mounting bracket is designed to automatically pre-tension the webbing during assembly without requiring external lever-type tools. The bracket's geometry and the webbing attachment mechanism work together to create inherent tension, allowing the system to serve itself during the assembly process.
Solution Approach 2:
The suspension mounting bracket acts as an intermediary element between the seat pan and the webbing, facilitating the pre-tensioning process. The bracket's specific structure (with slots and attachment points) mediates the force transmission and enables automatic tensioning without direct manual manipulation of the webbing ends.
2Reliability
If the webbing is pre-tensioned to handle bumps and jolts, then the suspension performance improves, but the assembly process requires specialized tools and procedures
Solution Approach 1:
The system is designed so that the act of mounting the suspension to the bracket automatically creates the necessary pre-tension in the webbing. The bracket's structure (including slot orientations and attachment geometries) ensures that normal assembly movements generate the required tension without requiring specialized pre-tensioning equipment or complex procedures.
3Strength
If the seat pan is reinforced with a mounting bracket, then the bracket provides structural support and facilitates suspension mounting, but the overall weight of the seat assembly increases
Solution Approach 1:
The mounting bracket is designed to perform multiple functions simultaneously: it reinforces the seat pan structure, provides mounting points for the suspension webbing, facilitates automatic pre-tensioning, and potentially serves as a backbone for the entire seat assembly. This multi-functionality reduces the need for separate structural components, thereby minimizing additional weight.
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 improved shock isolation, increased comfort for riders, and quicker, more consistent pre-tensioning of the suspension, enhancing both assembly efficiency and riding comfort by reducing vibration transmission and accommodating a backrest for adjustable support.
Implementation Method 1
a segment of elastomeric DYMETROL load bearing fabric or mesh that is suspended pre-tensioned at opposite ends... the webbing must be manipulated in a manner that increases the tension of the webbing... to be sufficiently taut, e.g., to be under sufficient tension
Implementation Method 2
at least one of the mounts is a beam spring that functions as a leaf spring that works in concert with the pre-tensioned webbing suspended between the mounts in supporting loads, resisting deflection, and absorbing bumps, jolts and the like typically encountered by the suspension during suspension operation
Data Source
AI summary
A motorcycle seat assembly that includes a seat pan with a load bearing hammock-type or hammock-style fabric or mesh seat suspension mounted using a suspension mounting bracket to the seat pan that is configured with an integral suspension mounting fixture that enables pre-tensioning of a stretchable webbing of load-bearing fabric or mesh material of the suspension during fixturing and/or mounting of the suspension to the seat pan.