Coffee Grinder Pushing Wheel Support Design to Reduce Coaxial Error
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Solution Overview
Problem
Existing grinding devices for coffee beans produce coffee powder with inconsistent graininess due to cumulative errors from numerous mating parts, leading to uneven particle sizes and potential creeping of components.
Innovation Solution
A grinding device with a pushing wheel supported by a radial and axial support system, including a fixed support member and rolling support member, which reduces the number of parts in the dimension chain and ensures coaxial accuracy, thereby maintaining consistent graininess.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional grinding devices with multiple mating parts are used, then the device can be assembled, but cumulative errors occur leading to poor coaxial accuracy and inconsistent coffee powder graininess
Solution Approach 1:
The patent combines multiple support functions (radial support and axial support) into a single integrated support structure. The support structure includes a support body with both radial support surfaces and axial support surfaces, eliminating the need for separate radial and axial support components. This merging reduces the number of mating parts in the dimension chain and minimizes cumulative assembly errors, thereby improving coaxial accuracy of the grinding elements.
Solution Approach 2:
The support structure serves multiple functions simultaneously: it provides radial support to maintain the positional relationship between grinding elements, provides axial support to prevent creeping of the drive assembly, and ensures proper alignment through its integrated geometry. This multi-functionality reduces the overall component count and simplifies the assembly process while maintaining high manufacturing precision.
2Reliability
If multiple mating parts are used in the grinding device, then the device can be assembled with basic functionality, but cumulative errors cause creeping of parts and unreliable operation
Solution Approach 1:
The patent merges radial support and axial support into a single integrated support structure, reducing the number of mating interfaces. This minimizes cumulative assembly errors and prevents creeping of parts during operation, thereby improving the reliability and consistency of coffee powder graininess across mass-produced devices.
Solution Approach 2:
The support structure acts as an intermediary between the drive assembly and the grinding elements, providing both radial and axial support through its integrated design. This intermediary structure eliminates the need for multiple separate support components, reducing assembly errors and ensuring reliable, consistent operation.
3Manufacturing precision
If radial support and axial support are provided separately, then each support function can be optimized, but the number of parts increases and assembly complexity increases
Solution Approach 1:
The patent combines radial support and axial support into a single integrated support structure. The support body includes both radial support surfaces for maintaining positional relationships and axial support surfaces for preventing creeping, all within one component. This merging reduces the number of support components from multiple separate parts to a single unified structure, minimizing cumulative assembly errors and improving coaxial accuracy.
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
The solution enhances the coaxial accuracy of grinding elements, reduces manufacturing costs, and prevents creeping of parts, ensuring consistent coffee powder graininess across mass-produced devices.
Implementation Method 1
a rolling support member is provided between the pushing wheel and the grinding housing, and the rolling support member provides at least axial support for the pushing wheel
Data Source
AI summary
Disclosed are a grinding device and a coffee machine equipped therewith. The grinding device includes: a grinding housing, provided with a discharge port on a side thereof; first and second grinding elements, coaxially disposed in the grinding housing, and forming a grinding gap, wherein the second grinding element rotates relative to the first grinding element to grind raw material in the grinding gap; a pushing wheel for pushing ground raw material from the grinding gap to the discharging port; a drive assembly, connected to the pushing wheel The pushing wheel includes a torque connection portion, the grinding housing is provided with a through hole for it to pass through, the torque connection portion is radially supported on the grinding housing by a fixed support member, a rolling support member is provided between the pushing wheel and the grinding housing and provides at least axial support for the pushing wheel.