Truncated Cone Scraper Elevations for Cooling Basket
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cooling devices for agricultural harvesting machines suffer from mechanical overload and material jamming at the scraper elevations, leading to damage and reduced screening effectiveness due to high peak loads during engagement with the counter comb.
Innovation Solution
The cooling device features scraper elevations designed as truncated cones that taper away from the sieve surface, allowing for easy diversion of collected material and reducing mechanical load, along with a recess for enhanced shredding and suction efficiency, and an inclined counter comb and scraper configuration to distribute engagement forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the scraper elevations are designed as truncated cones tapering away from the sieve surface, then material diversion and reduction of mechanical load are improved, but the device complexity increases
Solution Approach 1:
The scraper elevations are designed as truncated cones with curved surfaces instead of flat or angular shapes. This curvature allows material to be smoothly diverted away from the sieve surface through the tapered geometry, reducing mechanical load and preventing material accumulation while maintaining structural integrity.
Solution Approach 2:
Different regions of the scraper elevations have different geometric properties - the truncated cone shape provides a tapered surface for material diversion, while the recess provides a localized area for enhanced shredding action. This local differentiation optimizes both material removal and mechanical load distribution.
2Productivity
If the counter comb and scraper are arranged to engage material for shredding, then removal efficiency is improved, but peak mechanical loads increase causing damage
Solution Approach 1:
The truncated cone geometry of the scraper elevations preliminarily diverts and positions material away from the sieve surface before the shredding engagement occurs. This preliminary action reduces the amount of material that accumulates on the screening surface, thereby reducing peak mechanical loads during the subsequent engagement with the counter comb.
Solution Approach 2:
The truncated cone shape introduces a dimensional tapering effect that guides material flow in a specific direction away from the sieve surface. This dimensional approach creates a three-dimensional material diversion path that reduces material accumulation and distributes mechanical loads more evenly during engagement.
3Productivity
If the scraper elevations are designed to engage with the counter comb for shredding, then plant residue removal is improved, but material accumulation on the sieve surface increases
Solution Approach 1:
The truncated cone geometry provides a curved, tapered surface that actively directs material away from the sieve surface through gravitational and centrifugal forces during rotation. This curved geometry prevents material from settling on the flat sieve surface, thereby reducing accumulation while maintaining effective engagement with the counter comb for shredding.
Solution Approach 2:
The scraper elevations are designed to rotate with the cooler basket, dynamically changing their orientation relative to the sieve surface and counter comb. The truncated cone shape maintains its material diversion function throughout the rotation cycle, continuously preventing accumulation while enabling effective shredding engagement.
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 effectively prevents mechanical overloading, reduces accumulation on the sieve surface, and enhances the removal of plant residues through efficient shredding and suction, maintaining the screening effect and extending the device's operational lifespan.
Implementation Method 1
an outer surface of the truncated cone forms a 'ramp' leading away from the screen surface, by means of which material collected by the scraper can be guided away from the screen surface
Implementation Method 2
the rotation of the radiator basket exerts a centrifugal force on the dirt particles adhering to the sieve surface, achieving a certain cleaning performance even independent of a suction device, as the dirt particles are 'catapulted' radially outward relative to the rotation axis due to the centrifugal force
Implementation Method 3
a suction device by means of which particles adhering to the screen surface can be suctioned off
Implementation Method 4
the fingers of the counter-comb and the elevations of the wiper are thus adapted to mesh with one another, so that the fingers of the counter-comb penetrate the gaps between adjacent elevations of the wiper rotating with the radiator basket
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present application comprises a cooling device (1) for an agricultural harvesting machine (2), comprising a cooling basket (4) rotatable about a rotational axis (3), a scraper (5), and a counter-comb (6), wherein the cooling basket (4) is cup-shaped, wherein the cooling basket (4) is at least partially formed by a sieve surface (16) in the region of its end face (7) and its circumferential surface (8), through which a cooling air volume flow can enter an interior space of the cooling basket (4) from the surroundings, wherein the scraper (5) is arranged on the end face (7) and the circumferential surface (8) of the cooling basket (4) and is fixedly connected to the cooling basket (4) in such a way that it is rotatable with the cooling basket (4), wherein the scraper (5) has a plurality of spaced-apart projections (9), wherein the counter-comb (6) is fixed in position relative to the cooling basket (4).wherein the counter-comb (6) has a plurality of fingers (10) by means of which the counter-comb (6) and the wiper (5) comb with each other during the rotation of the cooler basket (4), so that the fingers (10) of the counter-comb (6) penetrate gaps (11) between adjacent projections (9) of the wiper (5). In order to provide a cooling device that is improved compared to the prior art, it is proposed according to the invention that at least one projection (9) of the wiper (5) is formed by a conical stub (15).