Screed Heating Element Holder With Integrated Channel Alignment

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Solution Overview

Problem

Conventional screed assemblies in paving machines require complex and time-consuming maintenance processes for removing and installing heating elements, often necessitating depot-level repairs due to heavy equipment design and debris access issues, which affect heat transfer uniformity.

Innovation Solution

A screed assembly design featuring a holder that forms a channel with the screed plate, allowing for easy access and alignment of a heating element, with a screed frame providing access to fasteners for reducing clamping force and facilitating removal or installation of the heating element without disassembling the screed plate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a separate cover and multiple hold down components are used to protect the heating element, then the heating element is protected from debris, but the device complexity increases and maintenance time increases

Engineering Contradiction:

Improveprotection from debrisVSAvoidnumber of components

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The holder integrates multiple functions: it protects the heating element from debris (acting as a cover), provides clamping force through integrated hold-down components, and enables alignment during installation. By combining these functions into a single component, the patent reduces the number of separate parts while maintaining protection and clamping capabilities.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The holder serves multiple purposes simultaneously: it acts as a protective cover, a clamping mechanism, and an alignment guide. This multi-functionality eliminates the need for separate cover and hold-down components, reducing overall device complexity while maintaining all necessary functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Stability of the object's composition

If conventional screed assembly design is used, then the structure is stable, but maintenance requires depot location and increases maintenance time

Engineering Contradiction:

Improvestructural stabilityVSAvoidmaintenance accessibility

Core Design Contradiction:

Stability of the object's compositionVSEase of repair

Solution Approach 1:

The heating element is designed as a separate, removable component that can be independently accessed and replaced. The holder provides a standardized interface that allows the heating element to be segmented from the rest of the screed assembly, enabling quick removal and installation at field locations without requiring depot-level maintenance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The holder acts as an intermediary component between the screed plate and the heating element. It provides a standardized interface that simplifies the connection and disconnection process, enabling quick maintenance while maintaining the structural stability of the overall assembly during operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of time

If the heating element is easily accessible for removal, then maintenance time is reduced, but heat transfer uniformity may be compromised

Engineering Contradiction:

Improvemaintenance timeVSAvoidheat transfer uniformity

Core Design Contradiction:

Loss of timeVSManufacturing precision

Solution Approach 1:

The holder features an asymmetric design with a specific geometry that provides both easy access for removal (through the opening) and precise alignment (through the shaped interface). The asymmetric shape ensures the heating element is positioned correctly relative to the screed plate, maintaining uniform heat transfer while allowing quick removal through the accessible opening.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent replaces complex mechanical alignment systems with a geometrically defined interface. The shaped holder and heating element interface provide automatic alignment through their geometry, eliminating the need for complex adjustment mechanisms while ensuring consistent heat transfer uniformity and enabling quick removal.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 design reduces maintenance time and complexity by allowing on-site removal and installation of heating elements, enhances heat transfer uniformity, and protects the heating element from debris, thereby improving operational efficiency and reducing maintenance costs.

Implementation Method 1

the screed plate is typically heated, to a temperature in the range of about 82° to 171° C. (180° to 340° F.). Heating the screed plate assists the paving material in flowing under the screed plate and reduces adhesion of the paving material to the screed plate.

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS10662592B1Screed heating element holder

Publication Date: 2020.05.26 CATERPILLAR PAVING PROD INC

AI summary

A screed assembly for use with a paving machine. The screed assembly can comprise: a screed plate; a holder configured to be removably connected to the screed plate and configured to be positioned thereon, wherein when connected thereto the screed plate and the holder form a channel having an opening at one end thereof; and a heater assembly having a heating element configured to be received in the channel and to be aligned by the holder when so received relative to an axis of symmetry of the screed plate.