Spraying Bar Vibration Damping via Pantograph Frame
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Solution Overview
Problem
Conventional spraying and distribution bars in agricultural machinery suffer from damage due to abrupt movements on irregular terrain, caused by propeller vehicle movements, leading to stress and instability issues with existing impact and vibration absorption mechanisms.
Innovation Solution
The central bar is placed between the front and rear wheels of the propeller vehicle, utilizing a central frame with horizontal and vertical pantograph sets, articulated elements, and damping components like rubber bearings and hydraulic accumulators to absorb vibrations and maintain alignment, allowing independent side bar movement and adjustment for improved stability and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional spraying bars are placed at the front or rear of the propeller vehicle, then the structure is simpler, but the oscillations and damage risks increase due to greater distance from the vehicle center
Solution Approach 1:
The patent transitions from placing the spraying bar in a single dimension (front or rear) to a new spatial dimension (central position between front and rear wheels). This dimensional change in placement location reduces oscillations by positioning the bar at the vehicle's center of gravity, thereby improving reliability without significantly increasing structural complexity.
2Reliability
If the central bar is placed between the front and rear wheels, then the stability and useful life increase, but the device complexity increases due to additional pantograph sets and articulation mechanisms
Solution Approach 1:
The patent introduces dynamic elements including a horizontal pantograph set that allows lateral movement, vertical pantograph sets for height adjustment, and ball-and-socket articulations that enable the side bars to move independently. These dynamic mechanisms absorb vibrations and adapt to terrain irregularities, improving reliability while managing complexity through functional necessity.
Solution Approach 2:
The central frame is segmented into multiple independent components: horizontal pantograph set, two vertical pantograph sets, articulated side bars, and damping elements. Each segment can move and absorb energy independently, allowing the system to handle complex vibrations without requiring a monolithic overly complex structure.
3Object-affected harmful factors
If impact absorbing mechanisms are added to reduce vibrations, then the stabilization improves, but the mechanisms themselves suffer from flaws in damping and stabilization during work
Solution Approach 1:
The patent merges multiple damping mechanisms into a unified system: rubber bearings are integrated into the horizontal and vertical pantograph sets, hydraulic accumulators are combined with the articulation points, and springs are incorporated into the side bar assemblies. This combined approach creates synergistic damping effects that overcome the limitations of individual mechanisms.
Solution Approach 2:
The patent employs composite damping solutions combining different material properties: rubber bearings provide elastomeric damping, hydraulic accumulators offer fluid-based shock absorption, and springs provide mechanical elasticity. This multi-material composite approach creates a more effective and reliable damping system than any single material could achieve alone.
4Stability of the object's composition
If the bars are allowed to move independently to absorb oscillations, then the stability improves, but the bars collide more frequently at course ends producing impact transfer
Solution Approach 1:
The patent incorporates preliminary anti-action through限位 stops and guiding mechanisms that prevent excessive movement of the independent side bars. These preventive features are built into the articulation system to stop bars before they can collide, thereby maintaining the benefits of independent movement while preventing harmful impact transfers.
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
This configuration enhances the useful life of the central frame and application bars by reducing the impact of oscillations, providing better product application stability and operator safety, with improved alignment and reduced risk of damage from vehicle movements.
Implementation Method 1
through damping and stabilization items which are rubber bearings, accumulators, springs and hydraulic accumulators
Implementation Method 2
it causes the effect of said load to be smaller, providing (as well as more durability) a better application of the products
Implementation Method 3
Another important effect which takes place when the bar is placed between the front and back wheels is the tandem effect, which reduces the vertical movement caused by the passage of one of the wheels over an uneven part of the ground
Data Source
AI summary
The central bar for spraying and/or distributing products in powder, liquid and granulate formulations refers to a central bar (1) to be fixed on the chassis (2a), between the front (2b) and the back (2c) wheels of a propeller vehicle (2), which is composed of a central frame set (3) and two side bars (4), where the central frame set (3) is composed of two brackets (3a) fixed to the chassis (2a) of said propeller vehicle (2); a horizontal pantograph subset (3b); two vertical pantograph subsets (3c), linked between them by the top side arms (3f) through an alternator axis (3i); two top articulation subsets (3e) formed from the extensions of the top side arms (3f); a shock absorption system, through bearings (3u) fixed to the inner walls of the brackets (3m) which are fixed to the side bars (4), wherein the internal braces (3n) are the end of the course; two bottom side subsets (3d) which are formed from the extensions of the bottom side arms (3h) driven by the hydraulic actuators (3t).