Lean Brake Mechanism for Leaning Vehicle Stability

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Solution Overview

Problem

Existing leaning vehicles lack a detailed configuration for their anti-roll devices, specifically in terms of the force and size of the anti-roll mechanism, which affects their stability and braking performance during leaning operations.

Innovation Solution

A leaning vehicle configuration that includes a lean mechanism with an upper arm, lower arm, first arm, and second arm, connected to a lean base, and a lean brake mechanism with a brake caliper and brake disc attached to the lean mechanism, where the brake disc is positioned on an arm farther from the brake pad to increase braking force while maintaining a compact design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If the brake disc is attached to an arm farther from the brake pad to increase rotation radius, then the braking force increases, but the device complexity increases

Engineering Contradiction:
Improvebraking forceVSAvoiddevice complexity
Core Design Contradiction:
ForceVSDevice complexity

Solution Approach 1:

The brake disc is designed to serve dual purposes: it acts as both a braking component and a structural link within the lean mechanism. By integrating the brake disc into the existing lean mechanism arms, the patent achieves multi-functionality where the same component contributes to both vehicle stability (through braking) and lean operation, thereby avoiding additional complexity despite the increased rotation radius

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the braking system with the lean mechanism by attaching the brake disc to the arms of the lean mechanism rather than treating them as separate systems. This integration allows the brake disc to be part of the existing structural framework, reducing overall device complexity while still achieving the desired large rotation radius for increased braking force

Inventive Principle:
Principle #5Merging (Combining)

2Volume of moving object

If the lean brake mechanism is attached to the lean mechanism, then the configuration becomes compact, but the braking force decreases due to limited space for force generation

Engineering Contradiction:
Improveconfiguration sizeVSAvoidbraking force
Core Design Contradiction:
Volume of moving objectVSForce

Solution Approach 1:

The patent resolves the space limitation by changing the dimensional approach to force generation. Instead of increasing braking force through linear expansion of brake components, the solution utilizes the rotational dimension by attaching the brake disc to arms with larger rotation radii. This dimensional shift allows compact packaging while achieving high braking force through the increased leverage of the larger rotation circle

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

Solution Approach 2:

The patent changes critical parameters of the braking system by selecting arms with different lengths and attachment positions. By varying the rotation radius parameter and the position where the brake pad contacts the brake disc, the system achieves high braking force within a compact volume. The parameter optimization allows the same compact structure to generate sufficient braking force through mathematical relationships rather than physical size

Inventive Principle:
Principle #35Parameter changes

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 a leaning vehicle with a large braking force and a compact configuration, effectively addressing the stability and braking performance issues by enhancing the braking force and maintaining a compact design.

Implementation Method 1

The brake disc is attached to one arm of the upper arm and the lower arm that is farther from the brake pad in a front view, has a contact portion that generates braking force by being pressed by the brake pad

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS11926388B2Leaning vehicle
Publication Date: 2024.03.12 KAWASAKI MOTORS LTD
  • US11926388B2 patent drawing
  • US11926388B2 patent drawing
  • US11926388B2 patent drawing

AI summary

A leaning vehicle includes a vehicle body, a left front wheel, a right front wheel, a lean mechanism, and a lean brake mechanism. The lean mechanism causes the left front wheel and the right front wheel to lean about a front-rear direction as a rotation center when the vehicle body leans about the front-rear direction as a rotation center. The lean brake mechanism brakes a leaning operation of the lean mechanism. The lean brake mechanism includes a brake caliper and a brake disc. The brake caliper is attached to the lean mechanism and has a brake pad. The brake disc is attached to the lower arm of the upper arm and the lower arm that is farther from the brake pad in the front view, has a contact portion that generates braking force by being pressed by the brake pad.