Screed Unit Coupling System for Paver Extension Sectors
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Solution Overview
Problem
Current paver finisher machines face laborious and complex processes when mounting screed unit extensions, particularly due to the weight and handling difficulties of these extensions, and existing solutions like hydraulic rams are costly and not highly reliable.
Innovation Solution
A fast coupling system using a male and female element with a frustum conical shape and a flared profile, allowing for easy alignment and secure clamping of extension sectors without the need for precise positioning, utilizing a dovetailed coupling mechanism and adjusters for alignment and misalignment adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional mounting processes are used for extension sectors, then secure connection is achieved, but the mounting process becomes laborious and time-consuming
Solution Approach 1:
The coupling system is divided into separate male and female elements that can be independently positioned and then joined. The male element with protrusions fits into the female element with corresponding recesses, allowing for modular assembly that speeds up the mounting process while maintaining secure connection.
Solution Approach 2:
The coupling system incorporates self-aligning features where the protrusions on the male element automatically guide into the recesses on the female element. This self-service mechanism reduces the need for precise manual positioning and complex alignment procedures, thereby reducing installation time without compromising connection security.
2Manufacturing precision
If precise positioning mechanisms are used for extension sectors, then alignment accuracy is improved, but the device complexity increases
Solution Approach 1:
The coupling system uses asymmetric male and female elements with specific geometric profiles. The male element has protrusions with specific shapes that fit into corresponding asymmetric recesses on the female element. This asymmetric design provides inherent alignment guidance, achieving accurate positioning through the geometry of the parts themselves rather than through complex external positioning mechanisms.
3Reliability
If traditional coupling methods are used for extension sectors, then reliable connection is achieved, but the mounting process becomes costly
Solution Approach 1:
The coupling system uses simple, easily manufacturable male and female elements that can be produced at low cost. The design prioritizes functional reliability through straightforward geometric interlocking rather than expensive materials or complex machining, making the coupling system cost-effective while maintaining reliable connections.
Data Source
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AI summary
Screed unit for paver finisher, of the type comprising a main screed, end plates and extension sectors which can be reciprocally aligned by means of adjusters and which can be reciprocally coupled. The main screed, end plates and extension sectors can be coupled and aligned by means of a coupling means operating according to a coupling system using fixing and clamping means with screws/bolts in fixing holes, in which alignment and disalignment means are provided of one unit to be coupled with respect to the other unit to be coupled with a movement with respect to the alignment axis, the alignment and disalignment means being linked/linkable to an undercut coupling means in which the coupling means consists of a male element and a female element, one of male element and female element being fixed in correspondence with at least one of the side-walls of the screed unit, the other one of male element and female element being fixed in correspondence with at least one of the side-walls of extension sector.