Lever Propelled Bicycle Torque Multiplication

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Solution Overview

Problem

Lever propelled bicycles have failed to penetrate the market due to their inability to match the pedaling propulsion performance of conventional bicycles, often resulting in excessive weight when attempting to provide mechanical advantage through additional components, which depletes their performance.

Innovation Solution

The Compound Torque Multiplying Lever Propelled Bicycle (CTMLPB) design incorporates a unique system with a lever machine and torque force multiplying gear mechanism, featuring a 8-tooth crank sprocket and 13-tooth freewheel sprockets, which provides a mechanical advantage of 1.54 and a consistent torque output from pedaling peak to base, utilizing lightweight materials like aluminum and chromoly to maintain efficiency and reduce weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If lever machines are added to a conventional bicycle frame to increase torque, then mechanical advantage is improved, but the bicycle weight increases excessively

Engineering Contradiction:

Improvetorque outputVSAvoidbicycle weight

Core Design Contradiction:

ForceVSWeight of moving object

Solution Approach 1:

The patent combines the lever machine mechanism with the bicycle frame structure itself, where the frame tubes serve as both structural support and lever arms. This integration eliminates the need for separate, heavy lever components while maintaining torque multiplication functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bicycle frame is divided into functional segments where specific tubes (head tube, top tube, down tube) serve as lever arms with defined fulcrum points. This segmentation allows torque to be applied and distributed efficiently through the frame structure without requiring a monolithic heavy design.

Inventive Principle:

Principle #1Segmentation

2Force

If a conventional frame structure is used with additional lever components, then torque multiplication is achieved, but the bicycle becomes too heavy to compete with conventional bicycles

Engineering Contradiction:

Improvetorque multiplicationVSAvoidoverall bicycle weight

Core Design Contradiction:

ForceVSWeight of moving object

Solution Approach 1:

The bicycle frame tubes serve multiple functions: structural support, lever arms for torque application, and force transmission paths. This multi-functionality eliminates the need for dedicated lever components, reducing overall weight while maintaining torque multiplication capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The frame structure itself provides the lever mechanism needed for torque multiplication, rather than requiring separate components. The frame's geometric configuration and material properties are utilized to achieve force multiplication without adding external weight.

Inventive Principle:

Principle #25Self-service

3Force

If torque is increased through lever machines, then propulsion force is improved, but the bicycle may not have an efficient multispeed system

Engineering Contradiction:

Improvepropulsion forceVSAvoidmultispeed capability

Core Design Contradiction:

ForceVSAdaptability or versatility

Solution Approach 1:

The patent incorporates a dynamic transmission system with variable gear ratios that can adapt to different riding conditions. The lever machine works in conjunction with a multispeed drivetrain, allowing the rider to optimize the balance between torque multiplication and speed for various terrains and loads.

Inventive Principle:

Principle #15Dynamics

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 CTMLPB achieves a significant mechanical and gravitational advantage, offering a consistent and enhanced propulsion force by leveraging body weight and leg muscles, resulting in greater torque output compared to conventional bicycles, while maintaining a balanced weight distribution.

Implementation Method 1

The lever machine has a mechanical advantage of 1.54... provides a mechanical advantage of 1.54 and a consistent torque output from pedaling peak to base

Methodology Applied

Scientific EffectMechanical Advantage: Mechanical Advantage

Implementation Method 2

featuring a 8-tooth crank sprocket and 13-tooth freewheel sprockets, which provides a mechanical advantage of 1.54 and a consistent torque output

Methodology Applied

Scientific EffectGear mechanism: Gear

Implementation Method 3

offering a consistent and enhanced propulsion force by leveraging body weight and leg muscles

Methodology Applied

Scientific EffectGravitation: Gravitation

Data Source

PatentUS11565767B2Compound torque multiplying lever propelled bicycle

Publication Date: 2023.01.31 SCARBOROUGH RASHAD NAIM

AI summary

The Compound Torque Multiplying Lever Propelled Bicycle uses two force multiplying machines to generate a large amount of torque to be applied directly to the sprocket of the rear wheel. This machine uses a lever machine as a means of mechanical advantage and a two gear combination machine as a means of mechanical advantage. In this configuration, the input gear is always larger than the output gear or sprocket. Furthermore, because the load of each lever machine is moved away from the fulcrum and closer to the pedals, less material is needed to reinforce the lever machines from the inside; thus, they are lighter. Furthermore, because the sprockets used to increase torque and range are smaller in diameter, they are then lighter, which would result in a bicycle that is lighter, having consistent increased torque from pedal peak to pedal base with a substantial amount of range.