Trunk Shaker Isolator Vibration Damping
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Solution Overview
Problem
Trunk shaker harvesters face issues with damage to plant trunks due to solid mounting and inadequate vibration damping, leading to frequent replacement of elastomeric connectors that fail to absorb vibrations in all directions.
Innovation Solution
A urethane-based isolator with a flexible mounting block and reinforcement sleeves, providing a durable and interchangeable damping solution that minimizes damage and vibration feedback, featuring a bushing with a sleeve and end cap for protection and easy mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solid mounting is used to connect skis to shaker head, then structural strength is improved, but plant trunk damage increases and vibration feedback worsens
Solution Approach 1:
An elastomeric isolator is introduced as an intermediary component between the ski and shaker head mounting arms. This isolator provides mechanical connection while absorbing vibrations and reducing forces transmitted to the plant trunk, thereby resolving the contradiction between structural strength and plant damage prevention.
Solution Approach 2:
The mounting connection is changed from rigid solid mounting to flexible elastomeric mounting. This parameter change in material properties (from rigid to elastic) allows the system to maintain structural integrity while reducing harmful vibrations and forces applied to the plant trunk.
2Object-affected harmful factors
If elastomeric connectors are used to reduce vibration, then plant trunk damage is reduced, but connector durability worsens and replacement frequency increases
Solution Approach 1:
The isolator uses a composite structure combining elastomeric material with embedded reinforcement elements (such as fabric layers or structural enhancements). This composite approach maintains the vibration-absorbing properties of elastomers while significantly improving durability and reducing replacement frequency.
3Loss of energy
If conventional elastomeric connectors are used for damping, then some vibration absorption is achieved, but damping in all directions is insufficient and vibration feedback persists
Solution Approach 1:
The isolator is designed with non-uniform properties in different directions, with enhanced damping characteristics specifically targeted at directions where vibration feedback is most problematic. This local quality enhancement ensures comprehensive vibration control in all directions while maintaining effective plant trunk protection.
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 isolator significantly extends the useful life of the harvester components, reducing damage to plant trunks and vibration feedback, while maintaining effective fruit dislodging and conveying efficiency.
Implementation Method 1
an isolator is used for mounting the skis to the shaker frame. The isolator includes a urethane, somewhat flexible mounting block
Implementation Method 2
The block may be a substantially rectangular element and includes a first orifice extending in a first direction for receiving a bushing
Data Source
AI summary
A fruit harvester includes a chassis; a motor; wheels; and a trunk shaker assembly. The shaker assembly includes engagement members configured to engage plants to loosen fruit. A mount connects the engagement members to a drive mechanism and includes an elastomeric block. The block includes a first passage formed therein extending from one side to an opposite side. Second passages extend from a third side to an opposite fourth side. A first tubular insert extends into the first passage and a second tubular inserts extend into the second passage. A backing plate is adjacent the fourth side and has orifices aligned with the second passages.