Paving Screed Heating Element Fastening Device
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Solution Overview
Problem
Existing paving screeds face challenges in safely and simply mounting heating elements without risking damage from over-tightening, which can lead to equipment failure.
Innovation Solution
A fastening device with an actuating member and an elastic element that applies a predetermined force to the heating element, using components like screws, cams, springs, and alignment aids to ensure secure mounting while preventing excessive deflection and damage, along with clamping and positioning aids to maintain the heating element's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating elements are clamped against a screed plate by means of screws, then the heating elements can be securely fastened, but the heating elements might be damaged in case of too strong tightening of the screws
Solution Approach 1:
The patent changes the parameter of fastening force from variable (manual screw tightening) to predetermined and limited. The elastic element is designed with specific material properties and geometry to provide a predetermined fastening force that prevents over-tightening damage while ensuring secure attachment of the heating element to the screed plate
Solution Approach 2:
The elastic element acts as a cushioning mechanism that limits the maximum fastening force applied to the heating element. By incorporating this elastic element into the fastening device before operation, the system preemptively prevents excessive force application that could damage the heating element, eliminating the need for operator judgment during tightening
2Reliability
If a fastening device with elastic element is used to apply predetermined force, then damage from over-tightening is prevented, but the device complexity increases
Solution Approach 1:
The elastic element is designed to automatically provide the predetermined fastening force without requiring additional control mechanisms. The element's material properties and geometry are configured so that it self-regulates the force application, eliminating the need for complex control systems, sensors, or adjustment mechanisms while ensuring consistent, damage-preventing fastening force
Solution Approach 2:
The fastening function and force limitation function are merged into a single elastic element component. This integration eliminates the need for separate force control mechanisms, sensors, or adjustment devices, thereby preventing heating element damage while maintaining relatively simple device structure
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 enables safe and reliable mounting of heating elements on screed plates, preventing damage and ensuring consistent force application, while allowing for easy alignment and secure positioning, thereby enhancing the operational safety and effectiveness of the paving screed.
Implementation Method 1
the actuating member is configured to by its operation deflect the elastic element directly or indirectly by a predetermined amount whereby the elastic element applies a predetermined force directly or indirectly onto the heating element
Implementation Method 2
the fastening device comprises an actuating member and a compression element wherein the actuating member is configured to by its operation compress the compression element directly or indirectly by a predetermined amount
Data Source
AI summary
A paving screed for a road paver that comprises a screed plate, a heating element and a fastening device for pressing the heating element onto the screed plate. The fastening device comprises an actuating member and an elastic element. The actuating member is configured to deflect through its operation the elastic element directly or indirectly by a predetermined amount, wherein the elastic element applies a predetermined force directly or indirectly onto the heating element and biases the heating element against the screed plate.