Motorcycle Backrest Assembly with Rotatable Base and Adjustable Link
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Solution Overview
Problem
Existing motorcycle backrest assemblies lack versatility, as they are typically fixed for either passenger or driver use and do not easily adapt between these configurations without tools, limiting rider comfort and functionality.
Innovation Solution
A motorcycle backrest assembly with a rotatable and adjustable design, featuring a base assembly with movable positions and a cargo rack that can be pivoted between stowed and deployed positions, allowing the backrest to be easily converted between passenger and driver configurations using a connecting link, lock pins, and telescoping shafts for height and lateral adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a backrest is fixed for either passenger or driver use, then the structure is simple and reliable, but the adaptability and versatility are limited
Solution Approach 1:
The backrest assembly incorporates rotatable and adjustable mechanisms that allow the backrest to dynamically change position and orientation. The base assembly can rotate relative to the mounting plate, and the backrest can rotate relative to the base assembly, enabling transition between passenger and driver configurations through controlled mechanical movement rather than fixed static positioning.
Solution Approach 2:
The backrest assembly is designed to perform multiple functions by serving both as a passenger backrest and a driver backrest. The mounting plate and base assembly configuration allows the same physical structure to be positioned for rear passenger support or rotated to provide driver support, making a single device universal for both riding positions.
2Adaptability or versatility
If a backrest is designed to convert between passenger and driver configurations, then the versatility is improved, but the ease of operation deteriorates due to tool requirements
Solution Approach 1:
The backrest assembly incorporates self-servicing mechanisms including lock pins with cam actuators that can be operated by hand without tools. The cam mechanism allows the lock pins to be moved between locked and unlocked positions through simple rotational motion, enabling the rider to reconfigure the backrest between passenger and driver positions using only manual effort.
3Reliability
If a backrest is mounted at the rear of the seat in the back fender area, then the mounting is simple and stable, but the ease of operation for driver configuration deteriorates
Solution Approach 1:
The mounting system allows the entire backrest assembly to rotate relative to the mounting plate, which is secured to the motorcycle frame. This rotational capability enables the assembly to dynamically reposition from a rear-mounted passenger configuration to a forward-positioned driver configuration, maintaining mounting stability while achieving operational accessibility for both rider positions.
Data Source
AI summary
A motorcycle backrest assembly includes a base assembly having first and second ends and a back rest rotatably connected to the first end of the base assembly such that the back rest is movable between first and second positions. A mounting plate has the second end of the base assembly rotatably connected thereto such that the base assembly is movable between first and second positions. The backrest assembly includes a first configuration as a passenger back rest where the backrest is in the first position and the base assembly is in the first position, and a second configuration as a driver backrest where the backrest is in the second position and the base assembly is in the second position.