Concrete Paving Machine Stepped Frame Design
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Solution Overview
Problem
Existing concrete paving machines are too large and heavy, making them difficult to transport and violating emission regulations, with impaired driver vision and a single cylinder system that can lead to frame warping and operational issues.
Innovation Solution
A machine design with a stepped frame arrangement, two cylinders per support beam for symmetrical expansion, and lowered motor and control elements to reduce weight and size, along with a middle frame for adjustable width and improved ventilation, using high-grade steel for weight reduction and enhanced structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single cylinder is used to operate the extendable skeleton, then the device complexity is reduced, but the frame stability deteriorates due to warping and jamming
Solution Approach 1:
The patent applies asymmetry by positioning cylinders on only one side of the support beam rather than symmetrically on both sides. This asymmetric configuration, combined with the specific mechanical linkage design, achieves stable symmetrical expansion of the skeleton while reducing the total number of cylinders needed, thus resolving the contradiction between device complexity and frame stability.
2Length of moving object
If the machine size is reduced to comply with transport regulations, then the ease of transport is improved, but the structural strength deteriorates
Solution Approach 1:
The patent applies dynamics by designing the skeleton as an extendable structure that can dynamically change its dimensions. The support beams can be extended to provide sufficient structural strength during operation, then retracted to a compact size for transport. This dynamic transformation allows the machine to meet both strength requirements during work and size constraints during transport, resolving the contradiction between machine length and structural strength.
3Power
If the engine room is enlarged to accommodate TIER 4 FINAL engines, then the power is improved, but the device complexity increases due to bigger engine rooms
Solution Approach 1:
The patent applies dimensionality change by relocating the engine room from a traditional horizontal placement to a vertical arrangement. The engine is positioned above the support beam with the exhaust system routing through the vertical space, utilizing the third dimension (height) rather than expanding horizontally. This vertical configuration reduces the horizontal footprint and overall machine length while accommodating the required engine power, resolving the contradiction between power and device complexity.
Data Source
AI summary
Device for realizing surfacing, in general, realizing surfaces that differ in nature, and more especially for realizing concrete pavements. In particular, it concerns a machine for realizing concrete roads, more especially a type of machine where work can be done without lateral formwork, in such way that after the machine has passed, the road is completely finished and that one only has to wait for the concrete to set and possibly seal the expansion joints before commissioning the road.