Angled Elastic Mount for Lawn Mower Vibration Isolation

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Solution Overview

Problem

Existing isolation mount systems for riding mowers and lawn tractors are ineffective in reducing the transmission of vibrations from the engine to the device frame, leading to operator discomfort and potential damage.

Innovation Solution

A prime mover mount system utilizing angled elastic members and brackets, which compress the elastic elements to absorb torque and vibrational forces, thereby reducing the transmission of vibrations to the device frame. The system includes a prime mover mount member, elastic members, and brackets positioned at specific compound angles to effectively dampen vibrations in multiple directions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If existing isolation mount systems are used, then the structure is simple, but the vibration transmission reduction is ineffective

Engineering Contradiction:
Improvevibration transmissionVSAvoidmount system complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies this principle by orienting the elastic members at specific compound angles (α and β angles) rather than simple vertical or horizontal orientations. This angular configuration allows the mount system to address vibration forces from multiple directions simultaneously, transforming a single-dimension isolation approach into a multi-dimensional solution that effectively reduces vibration transmission while maintaining reasonable structural complexity

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

Solution Approach 2:

The patent employs composite material principles by combining elastic members with brackets and mount structures to create a hybrid isolation system. The elastic members (which may be made of rubber, foam, or other viscoelastic materials) are integrated with rigid bracket components, forming a composite mount assembly that leverages the damping properties of elastic materials alongside the structural support of rigid components to achieve effective vibration reduction

Inventive Principle:
Principle #40Composite materials

2Object-affected harmful factors

If elastic members are used to absorb vibrations, then vibration transmission is reduced, but the device complexity increases

Engineering Contradiction:
Improvetorque force transmissionVSAvoidnumber of components
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies this principle by designing elastic members that simultaneously perform multiple functions: they absorb torque forces, dampen vibrations, and provide mechanical coupling between the prime mover and mount structure. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in device complexity while achieving effective torque force transmission reduction

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

Solution Approach 2:

The elastic members serve as intermediary elements between the rigid bracket structures, providing a compliant interface that mediates the transmission of forces. This intermediary approach allows the system to reduce torque force transmission and vibration while maintaining structural integrity, balancing the trade-off between component complexity and vibration isolation effectiveness

Inventive Principle:
Principle #24Intermediary (Mediator)

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 significantly reduces the transmission of vibrations to the device frame, enhancing operator comfort and reducing the risk of damage by effectively absorbing torque and vibrational forces through the use of angled elastic members and brackets.

Implementation Method 1

a first elastic member, a second elastic member... placing the first elastic member into compression... placing the second elastic member into compression... absorb torque and vibrational forces

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

reduces the transmission of vibrations from the engine to the device frame... effectively dampen vibrations in multiple directions

Methodology Applied
Scientific EffectVibration damping: Damping

Data Source

PatentUS8118288B2Isolation mount system
Publication Date: 2012.02.21 BRIGGS & STRATTON CORP
  • US8118288B2 patent drawing
  • US8118288B2 patent drawing
  • US8118288B2 patent drawing

AI summary

An engine mount system for a lawn mower having a front, rear, and two sides. The engine mount system includes a mounting plate, an engine, first and second elastic members, and first and second brackets. The engine is mounted to the mounting plate and applies a torque force to the mounting plate during lawn mower operation. The first bracket is provided on the mounting plate and includes a first surface. The first surface is adjacent the first elastic member and partially faces the front, thereby placing the first elastic member into compression when the engine applies the torque force to the mounting plate. The second bracket is provided on the mounting plate and includes a second surface. The second surface is adjacent the second elastic member and partially faces the rear, thereby placing the second elastic member into compression at the same time as the first elastic member.