L-Shaped Spreading Blade for Road Construction Mass
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Solution Overview
Problem
Existing road-construction mass spreading devices face challenges in achieving precise and economical spreading due to issues with layer thickness control, resistance from large spreading blades, and instability during operation, leading to uneven surfaces and high energy consumption.
Innovation Solution
A road-construction mass spreading device with a short, L-shaped spreading blade and a loadable roller wheel, supported by the spread mass, which allows for quick and precise adjustment of layer thickness and stabilization, reducing energy consumption and material waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a horizontally mounted spreading blade with large surface area is used, then the spreading device can cover a wide area, but the resistance from the blade increases and layer thickness control precision deteriorates
Solution Approach 1:
The spreading blade is segmented into a short longitudinal part (5-20% of greatest width) and a vertical part, creating an L-shaped profile. This segmentation reduces the horizontal surface area that contacts the road surface, thereby reducing resistance while maintaining effective spreading capability through the vertical component.
Solution Approach 2:
The spreading blade transitions from a primarily horizontal configuration to an L-shaped profile with significant vertical dimension. The vertical part of the blade performs the spreading function while the short longitudinal part minimizes horizontal resistance, effectively using a different dimensional approach to solve the contradiction.
2Speed
If a vertically moveable spreading blade is used, then layer thickness adjustment is faster, but the construction cost increases and the blade wears rapidly
Solution Approach 1:
The spreading blade is designed with quick-adjust capability through a simplified vertical movement mechanism. The blade can be rapidly positioned at different heights to adjust layer thickness, and the L-shaped profile with short longitudinal part reduces wear by minimizing horizontal contact with the road surface.
Solution Approach 2:
The spreading blade is designed as a relatively simple, easily replaceable component with the L-shaped profile. The short longitudinal part reduces wear, and the overall design allows for cost-effective construction and rapid replacement if needed, avoiding the high cost of complex vertically moveable mechanisms.
3Stability of the object's composition
If the spreading device is supported mainly with front wheels, then the device is more stable, but the rear frame becomes floating and the device is liable to pitch
Solution Approach 1:
The roller wheel is designed to be loadable, allowing it to carry the weight of the rear frame and spreading blade. This self-loading mechanism provides stable support for the rear portion of the device, eliminating the floating condition and preventing pitch while using the device's own weight to achieve stability.
Solution Approach 2:
The loadable roller wheel acts as a counterweight mechanism, supporting the rear frame weight and balancing the device. By allowing the roller wheel to be loaded with the appropriate weight, the device achieves operational stability and prevents pitching during movement.
4Productivity
If the spreading blade has large surface area, then more material can be spread at once, but energy consumption increases
Solution Approach 1:
The spreading blade is divided into functional segments: a short longitudinal part that minimizes resistance and energy consumption, and a vertical part that performs the spreading function. This segmentation allows efficient material spreading without the excessive energy consumption associated with large horizontal blade surfaces.
Solution Approach 2:
The spreading function is achieved primarily through the vertical dimension rather than horizontal expansion. The L-shaped blade uses vertical movement and the vertical part's surface area to spread material, reducing the horizontal distance the blade must move and thereby reducing energy consumption while maintaining productivity.
Data Source
Figure 1a
Figure 1b
Figure 2a~2b
AI summary
The invention relates to a spreading device for a road-construction mass substance, which is arranged to be attached to a work machine (100), which spreading device (10) includes - a front frame (12) arranged to receive the road-construction mass substance (90), - a rear frame (14), attached at a distance (d) to the front frame (12), for spreading the road-construction mass substance (90), - a spreading blade (18) fitted to the rear frame (14), for delimiting the road-construction mass substance (90) to form a layer on the surface of the road (92), - a roller wheel (20) fitted to the rear frame (14), for compacting the spread road-construction mass substance (90), and - control devices (22) for adjusting the distance between the spreading blade (18) and the road (92) surface. The said spreading blade (18) includes a part (28) in the longitudinal direction of the spreading device (10), which is in length 5 - 20 % of the greatest width of the spreading device (10) and the spreading device (10) includes a loading operating device (24) for loading the said roller wheel (20).