Coffee Grinder Burr Assembly for Cleaning Without Recalibration
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Solution Overview
Problem
Existing coffee grinder-dispensers require laborious operations to return grinding wheels to their correct adjustment after cleaning, disrupting the previously set grinding degree.
Innovation Solution
The coffee grinder-dispenser design includes a driven grinding wheel with axial movement controlled by a worm and gear mechanism, allowing the fixed grinding wheel to be removed for cleaning without altering the driven wheel's position, maintaining the adjustment setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the threaded coupling arrangement is used to enable axial movement of the grinding wheel for continuous adjustment of grinding degree, then the grinding adjustment is improved, but the cleaning operation becomes laborious and time-consuming
Solution Approach 1:
The grinding wheel assembly is segmented into a fixed grinding wheel and a movable grinding wheel. The movable grinding wheel is mounted on a shaft that can be independently removed from the housing, allowing the grinding chamber to be accessed for cleaning without disturbing the fixed grinding wheel and its adjustment setting.
Solution Approach 2:
The movable grinding wheel is extracted as a separate removable component from the housing. This allows the grinding chamber to be cleaned by removing only the movable wheel, while the fixed wheel remains in place with its adjustment setting intact, eliminating the need to disassemble the threaded coupling arrangement.
2Manufacturing precision
If the threaded coupling arrangement is used to enable axial movement of the grinding wheel for continuous adjustment of grinding degree, then the grinding adjustment is improved, but the operation complexity increases
Solution Approach 1:
The grinding wheel assembly is segmented into a fixed grinding wheel and a movable grinding wheel. The movable grinding wheel is mounted on a shaft that can be independently removed from the housing, allowing the grinding chamber to be accessed for cleaning without disturbing the fixed grinding wheel and its adjustment setting.
Solution Approach 2:
The movable grinding wheel is extracted as a separate removable component from the housing. This allows the grinding chamber to be cleaned by removing only the movable wheel, while the fixed wheel remains in place with its adjustment setting intact, eliminating the need to disassemble the threaded coupling arrangement.
3Stability of the object's composition
If both grinding wheels are fixed in position for stable grinding, then the grinding stability is improved, but the cleaning accessibility deteriorates
Solution Approach 1:
The grinding wheel assembly is segmented into a fixed grinding wheel and a movable grinding wheel. The movable grinding wheel is mounted on a shaft that can be independently removed from the housing, allowing the grinding chamber to be accessed for cleaning without disturbing the fixed grinding wheel and its adjustment setting.
Solution Approach 2:
The movable grinding wheel is extracted as a separate removable component from the housing. This allows the grinding chamber to be cleaned by removing only the movable wheel, while the fixed wheel remains in place with its adjustment setting intact, eliminating the need to disassemble the threaded coupling arrangement.
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
Enables easy and comfortable cleaning of the grinding chamber without disturbing the pre-set grinding degree, simplifying the maintenance process.
Implementation Method 1
the worm 38 which engages the gear wheel 34 of the sleeve 32 is rotated to cause it to rotate axially. Given the threaded coupling between the portions 46, 48, this rotation has the effect of raising and lowering the sleeve and consequently the driven grinding wheel relative to the fixed grinding wheel.
Implementation Method 2
The lateral surface of the sleeve 32 is provided with a thread 46 cooperating with a corresponding threaded portion 48 provided in a structure 50 rigid with the base 2.
Implementation Method 3
The shaft 26 is guided axially by ball bearings 30 inserted into a sleeve 32 on which the driven grinding wheel 28 rests.
Implementation Method 4
The pulley 14 is connected via a belt 16 to a driven wheel 18 of diameter greater than the diameter of the pulley 14.
Data Source
AI summary
A coffee grinder includes a support base containing a grinding chamber, the base housing an electric motor coupled to a first shaft, to which a second shaft rotatably coupled but which is axially free, the second shaft rotating a movable grinding wheel; a sleeve, within which the second shaft rotates freely but is axially restrained, and which has a threaded lateral surface cooperating with a threaded portion rigidly coupled to the base, the movable grinding wheel being axially constrained to the sleeve; a fixed grinding wheel facing the movable grinding wheel in the interior of the grinding chamber, the fixed grinding wheel being fixedly coupled to the base frame; and a moving system that translates the sleeve axially.