Gear Motor Locking Mechanism for Compact Leaning Vehicle Stability

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Solution Overview

Problem

Existing anti-roll locking systems for hybrid vehicles, like three-wheeled vehicles, require costly components to ensure stability and irreversibility, leading to a large size and high production costs.

Innovation Solution

A locking system utilizing a gear motor connected to a locking device with a pair of transmission wheels coupled to the input shaft, increasing friction and allowing the use of cheaper materials like plastic, reducing the overall size and cost while maintaining stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a gear motor with an endless screw coupled to a wheel with helical teeth is used to ensure stability and irreversibility, then the locking system achieves reliability, but the cost increases and the overall size increases

Engineering Contradiction:
Improvestability of locking systemVSAvoidcost of components
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The transmission system is segmented into multiple wheels with helical teeth instead of a single wheel, distributing the friction requirement across multiple contact points and reducing the complexity and cost of each individual component

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention changes the friction coefficient parameter by using multiple wheels with helical teeth, achieving the required irreversibility and stability through increased cumulative friction rather than relying on expensive special materials

Inventive Principle:
Principle #35Parameter changes

2Reliability

If a gear motor with an endless screw coupled to a wheel with helical teeth is used to ensure irreversibility, then the locking system maintains stability, but the overall size of the locking system increases

Engineering Contradiction:
Improveirreversibility of movementVSAvoidsize of locking system
Core Design Contradiction:
ReliabilityVSVolume of stationary object

Solution Approach 1:

The single large wheel is segmented into multiple smaller wheels with helical teeth, achieving the same friction effect while reducing the overall volume occupied by the transmission components

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention arranges multiple wheels in a dimensional configuration that maximizes friction contact while minimizing the footprint of the locking system

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Reliability

If a wheel with helical teeth made of special materials like bakelized fabric is used, then the friction coefficient between the wheel and endless screw is high enough to ensure irreversibility, but the cost of the gear wheel increases

Engineering Contradiction:
Improvefriction coefficientVSAvoidcost of gear wheel
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The friction requirement is segmented across multiple wheels instead of concentrating it in a single expensive wheel, allowing the use of cheaper materials for each individual wheel while achieving the same cumulative friction effect

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Instead of using one expensive wheel with special materials, the invention uses multiple copies of simpler wheels, achieving the same functional effect through quantity rather than material quality

Inventive Principle:
Principle #26Copying

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 system achieves stability and safety by increasing friction between the transmission wheels and input shaft, enabling the use of smaller, cheaper components, thus reducing the overall size and cost of the locking system while ensuring the vehicle's stability and preventing falls.

Implementation Method 1

increasing friction between the transmission wheels and input shaft

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS11891144B2Leaning vehicle locking system comprising a gear motor
Publication Date: 2024.02.06 PIAGGIO & C SPA
  • US11891144B2 patent drawing
  • US11891144B2 patent drawing
  • US11891144B2 patent drawing

AI summary

A locking system for a vehicle having a locking device and a gear motor operatively connected to the locking device and configured to cause the locking device to take a stable locking state and a release state, where the gear motor includes a drive motor having an input shaft, a first transmission wheel coupled to a first portion of the input shaft and a second transmission wheel coupled to a second portion of the input shaft.