Coffee bean grinding system for coffee machine
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Solution Overview
Problem
Existing coffee bean grinding systems face issues with assembly precision, leading to non-uniform coffee powder due to coaxial alignment errors between the upper and lower grinding blades, resulting in poor coffee quality.
Innovation Solution
A coffee bean grinding system with a separated-type structure featuring a gear box and lower grinding blade assembly, utilizing a plug-and-socket connection method and a transmission joint with a shaft hole and protrusion for quick and stable assembly, ensuring coaxiality between the upper and lower grinding blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the bevel gear, lower grinding blade support, lower grinding blade and upper grinding blade are assembled as an integrated coaxial structure, then the structural stability is improved, but the manufacturing precision and assembly difficulty increase significantly
Solution Approach 1:
The patent divides the integrated coaxial structure into separate modular components: the bevel gear assembly and the lower grinding blade assembly are manufactured independently and then connected through a transmission joint. This segmentation allows each component to be manufactured and assembled separately, reducing the cumulative effect of alignment errors and making it easier to maintain coaxial alignment between the upper and lower grinding blades.
2Device complexity
If the bevel gear and lower grinding blade are made as one body, then the device complexity is reduced, but the assembly precision and coffee powder uniformity deteriorate
Solution Approach 1:
The patent introduces a transmission joint as an intermediary component between the bevel gear and the lower grinding blade. This transmission joint serves as a mediator that facilitates precise connection and alignment, allowing the bevel gear and lower grinding blade to be connected while maintaining coaxial alignment with the upper grinding blade, thus resolving the precision issue without significantly increasing overall device complexity.
3Stability of the object's composition
If a rigid fixed connection is used between the bevel gear and lower grinding blade, then the structural stability is improved, but the assembly flexibility and error correction capability are reduced
Solution Approach 1:
The patent employs a transmission joint with dynamic connection characteristics that allow for adjustment and alignment during assembly. The joint provides a degree of flexibility enabling workers to correct alignment errors while maintaining stable operation during the grinding process. This dynamic approach balances assembly flexibility with operational stability.
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 configuration reduces assembly errors and maintains consistent spacing between the grinding blades, producing coffee powder with uniform particle sizes and enhancing coffee quality.
Implementation Method 1
The bearing forms a support to the transmission joint, thereby ensuring the stability when the transmission joint rotates
Implementation Method 2
The outer peripheral surface of the output shaft is provided with a protrusion extending along the axial direction of the output shaft. The shaft hole wall is provided with a groove that is matched with the protrusion
Data Source
AI summary
A coffee bean grinding system for coffee machine comprising a coffee bean grinding box, a lower grinding blade assembly disposed within the coffee bean grinding box and a gear box, wherein the coffee bean grinding box further comprises a bottom wall, the lower grinding blade assembly further comprises a transmission joint disposed on the bottom wall, and the gear box further comprises an output shaft that is drivingly connected to the transmission joint; the transmission joint is movably connected to the output shaft.