Riding Concrete Trowel Stabilizer Vibration Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Riding concrete finishing trowels experience significant vibrations, known as 'stick-slip' or 'chatter,' which cause operator discomfort and marring of the concrete surface, and existing solutions either increase weight and expense or use expensive composite blades that are not widely accepted.
Innovation Solution
The implementation of gas springs as stabilizers between the frame and the gearbox or pitch control post to dampen vibrations, improving steering response and reducing rotor vibration effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional rigid mounting is used between frame and gearbox, then structural strength is maintained, but vibrations and chatter are transmitted directly causing operator discomfort and surface marring
Solution Approach 1:
The patent applies beforehand cushioning by installing vibration isolators (elastomeric elements) between the gearbox and frame, and between the pitch control post and frame, to dampen vibrations before they propagate through the structure to the operator and concrete surface
Solution Approach 2:
The patent introduces vibration isolators as intermediary elements between the gearbox and frame, and between the pitch control post and frame, to mediate the transmission of vibrations while maintaining structural connectivity
2Object-affected harmful factors
If existing vibration reduction solutions are implemented, then vibrations are reduced, but weight and expense increase
Solution Approach 1:
The patent uses inexpensive elastomeric vibration isolators instead of expensive composite blades or heavy damping systems, achieving vibration reduction through simple, low-cost components that can be easily replaced if needed
Solution Approach 2:
The patent changes the physical parameters of the mounting system by introducing elastomeric elements with specific damping properties, altering the vibration transmission characteristics without significantly changing the overall mass of the machine
3Object-affected harmful factors
If existing vibration reduction solutions are implemented, then vibrations are reduced, but manufacturing cost increases
Solution Approach 1:
The patent uses inexpensive elastomeric vibration isolators instead of expensive composite blades or heavy damping systems, achieving vibration reduction through simple, low-cost components that can be easily replaced if needed
Solution Approach 2:
The vibration isolators are self-contained elastomeric elements that require no complex assembly, adjustment, or maintenance, reducing manufacturing and service costs while effectively dampening vibrations
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 gas springs significantly reduce vibrations by over 50% and enhance steering responsiveness, with average chatter reduction of at least 50% to 75% across various blade pitch angles, and improve the overall operational stability of the trowel.
Implementation Method 1
gas springs as stabilizers between the frame and the gearbox or pitch control post to dampen vibrations
Data Source
AI summary
In a riding concrete finishing trowel, a stabilizer is operatively disposed between the frame and either the gearbox or a structure that is coupled to the gearbox so as reduce the effects of rotor assembly vibration on the trowel. In one embodiment, the stabilizer takes the form of a gas spring located between the frame and the pitch control post. The stabilizer may be located relatively close to the top of the pitch control post so as to take advantage of the mechanical advantage offered by the spacing between that location and the gearbox.