Spreader Device Beater Bar Metering Mechanism
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Solution Overview
Problem
Existing material spreaders are not well-suited for treating smaller surfaces, as they tend to over-spread materials like salt and sand, wasting resources and damaging vegetation, and require manual adjustments for varying output.
Innovation Solution
A material spreader using a slow-rotating beater bar with paddles that controls the discharge of material through a high ratio transmission and low RPM motor, allowing precise distribution directly from the hopper or onto a spinner for targeted application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional spreader uses an auger or conveyor to move material to the discharge opening, then the spreader can handle larger surfaces, but it over-spreads material on smaller surfaces like sidewalks, wasting resources and damaging vegetation
Solution Approach 1:
The spreader employs a variable speed motor that can adjust the rotation speed of the beater bar to match different spreading requirements. The controller receives input from a speed sensor and adjusts motor speed accordingly, enabling the system to adapt dynamically from large surface areas to small surfaces like sidewalks, preventing material waste while maintaining versatility
Solution Approach 2:
The system changes the operational parameters by varying the rotation speed of the beater bar through a wide range (e.g., 0-30 RPM). This parameter adjustment allows the same spreader to deliver appropriate material quantities for both large roads and small sidewalks, resolving the contradiction between versatility and material waste
2Device complexity
If a conventional spreader uses a manual gate adjustment mechanism, then the structure is simple, but it requires speed change or gate change to achieve different output, reducing ease of operation
Solution Approach 1:
The patent replaces the traditional mechanical gate adjustment mechanism with an electronically controlled system. A variable speed motor with electronic controller adjusts the rotation speed of the beater bar to control material discharge, eliminating the need for manual gate adjustments and providing smoother, more precise control with better operator ergonomics
3Productivity
If a spreader discharges material directly from the discharge opening, then the distribution is simple, but it cannot provide controlled distribution for smaller amounts of material
Solution Approach 1:
The system introduces a beater bar with paddles that can rotate at variable speeds controlled by a variable speed motor. This dynamic mechanism allows precise control over the amount of material discharged by adjusting rotation speed, enabling controlled distribution for smaller amounts while maintaining the ability for rapid discharge at higher speeds when needed
Data Source
AI summary
A material spreader having a beater bar that meters the supply of small quantities of material to the discharge opening of a material spreader hopper eliminating the need for a gate. The beater bar has one and preferably several paddles that rotate adjacent the discharge opening and as the paddle passes the opening, discharges only the amount of material on the paddle. The material spreader uses a high ratio transmission and low rpm motor to allow for extremely slow rotation of the beater bar. The motor speed can be controlled to allow very slow rotation and very small amounts of material to be discharged from the hopper. The spreader does not require a gate. The discharge of material is metered electronically.