Variable Screw Suspension for Road Finishers
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Solution Overview
Problem
Existing road finishers require multiple auger bearing arrangements for different paver models, leading to increased storage and manufacturing costs due to the need for various worm bearing setups, and existing height-adjustable solutions are not flexible enough to accommodate different screw blade diameters.
Innovation Solution
A road finisher design featuring first and second hole patterns on the chassis to accommodate different screw bearing arrangements, with equidistantly spaced holes allowing for adjustable height positioning and offset patterns for flexible attachment using lifting cylinders, enabling the use of various auger bearing assemblies across different paver models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different worm gear bearing arrangements are used for different road paver models, then the distribution auger can be positioned at the appropriate distance for each model, but the demand for bearings and manufacturing costs increase
Solution Approach 1:
The patent implements a universal mounting system where a single worm gear bearing arrangement can be adapted to different road paver models through multiple hole patterns. The bearing assembly can be mounted at different positions on the chassis using alternative hole patterns, allowing one bearing arrangement to serve multiple paver model requirements without needing separate bearing assemblies for each model.
Solution Approach 2:
The mounting system incorporates adjustability through multiple hole patterns that allow the bearing arrangement to be repositioned dynamically. This enables the same bearing assembly to adapt to different distribution auger positions and diameters by selecting appropriate mounting holes, providing flexibility without requiring multiple fixed bearing arrangements.
2Manufacturing precision
If different worm gear bearing arrangements are manufactured for different models, then each model gets optimized positioning, but production costs increase
Solution Approach 1:
The chassis is equipped with multiple hole patterns that enable a single standardized bearing arrangement to achieve model-specific positioning accuracy. Instead of manufacturing different bearing assemblies for each model, the same bearing can be mounted at different positions using the alternative hole patterns, maintaining positioning precision while simplifying manufacturing.
Solution Approach 2:
The mounting system is segmented into multiple discrete hole patterns on the chassis, allowing the bearing arrangement to be positioned at different locations depending on the paver model requirements. This segmentation enables a single bearing assembly to achieve model-specific positioning without requiring custom manufacturing for each model.
3Device complexity
If fixed height bearing arrangements are used, then the structure is simple, but the distribution auger cannot be adjusted to different heights
Solution Approach 1:
The mounting system transitions from a fixed structure to a dynamic, adjustable configuration through the provision of multiple hole patterns. The bearing arrangement can be repositioned vertically by selecting different hole patterns, enabling height adjustment while maintaining relatively simple structural elements. This dynamic adaptability allows the same simple structural components to achieve multiple height positions.
Solution Approach 2:
The solution adds vertical dimensionality to the mounting system by incorporating multiple hole patterns at different heights on the chassis. This allows the bearing arrangement to be positioned at different vertical levels without complicating the horizontal mounting structure, effectively adding adjustability in the height dimension while keeping the base structure simple.
4Device complexity
If a single hole pattern is used on the chassis, then the structure is simple, but different worm gear bearing arrangements cannot be attached
Solution Approach 1:
The chassis incorporates multiple hole patterns that enable a single mounting system to accommodate different worm gear bearing arrangements and distribution auger configurations. These alternative hole patterns allow the same chassis to support various bearing arrangements with different mounting requirements, achieving universality without significantly increasing structural complexity.
Solution Approach 2:
The hole pattern system is segmented into multiple discrete patterns on the chassis, each suitable for different bearing arrangement types. This segmentation allows selective use of appropriate hole patterns based on the specific bearing arrangement being installed, enabling compatibility with multiple bearing types while maintaining a relatively simple overall structure.
Data Source
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AI summary
Road paver (100) with a chassis (10) and a worm gear bearing assembly (1) for receiving a distribution worm (2), comprising a first and a second hole carrier (28, 29) on the chassis (10) to attach the worm gear bearing assembly (1) to the chassis (10), wherein the first and the second hole carrier (28, 29) each comprise a first and a second hole pattern (24, 25) to attach different worm gear bearing assemblies (1) to the road paver (100) by means of the first hole pattern (24) or by means of the second hole pattern (25).