Tamping assembly
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Solution Overview
Problem
Existing espresso coffee machine tamping assemblies often suffer from damage to the filter cup and auger due to engagement issues, and inadequate tamping of coffee grounds when the auger's travel distance exceeds the filter cup depth.
Innovation Solution
A coffee compacting assembly with an auger that rotates angularly and longitudinally, featuring an auger positioning device allowing for movement between a start position and a raised position above the filter cup floor, minimizing contact and using a motor-driven shaft system with a cam member or threaded shaft for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the auger is extended to reach the bottom of the filter cup, then adequate engagement with coffee grounds is achieved, but damage to the filter cup and auger occurs due to contact with the filter cup floor
Solution Approach 1:
The auger is made dynamically adjustable in position through the auger positioning device, allowing it to move between a retracted position (avoiding contact with filter cup floor) and an extended position (achieving adequate engagement with coffee grounds). This dynamic adjustment resolves the contradiction by enabling the system to optimize auger position based on operational requirements.
Solution Approach 2:
The auger positioning device performs preliminary positioning of the auger before the tamping operation begins. By pre-positioning the auger at the correct starting location above the filter cup floor, the system prevents harmful contact while ensuring adequate engagement with coffee grounds during the tamping process.
2Length of moving object
If the auger travel distance exceeds the filter cup depth, then the auger can engage coffee grounds adequately, but the auger contacts the filter cup floor causing damage
Solution Approach 1:
The auger positioning device enables dynamic adjustment of the auger's starting position, allowing the full travel distance of the auger to be utilized effectively. By adjusting the starting position, the system ensures the auger reaches adequate depth for coffee grounds engagement without the extended travel causing contact with the filter cup floor.
Solution Approach 2:
The system changes the positional parameter of the auger through the auger positioning device, adjusting the starting position to optimize the relationship between auger travel distance and filter cup depth. This parameter adjustment prevents harmful contact while maintaining adequate engagement capability.
3Object-affected harmful factors
If the auger is positioned higher to avoid contact with the filter cup floor, then damage is prevented, but inadequate tamping occurs due to insufficient engagement with coffee grounds
Solution Approach 1:
The auger positioning device enables dynamic positioning that allows the auger to start at a higher position (preventing damage) while still achieving sufficient engagement with coffee grounds during operation. The system optimizes both damage prevention and tamping effectiveness through adjustable positioning.
Solution Approach 2:
The auger positioning device performs preliminary positioning to establish the optimal starting position before tamping begins. This pre-positioning ensures the auger is high enough to avoid contact with the filter cup floor (preventing damage) while low enough to engage coffee grounds adequately (ensuring effective tamping).
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
Prevents damage to the filter cup and auger while ensuring effective tamping of coffee grounds by allowing the auger to operate above the filter cup floor, maintaining optimal contact for efficient coffee compaction.
Implementation Method 1
a motor coupled to the auger to rotate the auger about said axis
Implementation Method 2
a threaded shaft rotatably driven by the positioning motor, with the threaded shaft rotated to cause movement of the second shaft and therefore the auger
Implementation Method 3
the auger positioning device includes a cam member, moved angularly to provide for adjustment of the start position of the auger
Data Source
AI summary
A coffee compacting assembly (22) that receives ground coffee to compact the coffee in a filter cup (25) having a floor (39), the coffee compacting assembly (22) including: an auger (33) having an axis (30) about which the auger (33) is rotated to compact the ground coffee in the filter cup (25), with the auger (33) extending angularly and longitudinally relative to said axis (30); a motor (51) coupled to the auger (33) to rotate the auger (33) about said axis (30); and an auger positioning device (40) engaged with the auger (33) to provide for movement of the auger (33) between a start position and a raised position above the start position, with the start position being predetermined so that the auger (33) is located at a predetermined location within the filter cup (25).