Brewing device for a beverage preparation machine, in particular coffee or tea
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Solution Overview
Problem
Existing brewing devices with cam transmissions lack precision and control in the movement of their closing bodies, affecting the trajectories and final positions reached during the brewing process.
Innovation Solution
A brewing device with a novel actuating mechanism that includes a barrel cam, cam followers, and a rack-and-pinion mechanism, which transforms rotational motion into precise translational and rotational movements of the closing body, allowing for improved control and accuracy in closing and opening positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cam transmissions are used to move the closing body, then the device structure is relatively simple, but the precision and control of the closing body movement trajectory and final position are insufficient
Solution Approach 1:
The actuating mechanism is segmented into multiple independent functional components: a barrel cam for generating radial motion, cam followers for converting radial motion to linear motion, and a rack-and-pinion mechanism for converting linear motion to rotational motion. Each component performs a specific function, allowing precise control of the closing body's movement trajectory and final position through the coordinated action of these segmented elements.
2Measurement precision
If a complex transmission mechanism is introduced to improve movement precision, then the control accuracy improves, but the device complexity increases
Solution Approach 1:
The invention replaces conventional complex multi-cam transmissions with a more efficient mechanical system combining a barrel cam, cam followers, and rack-and-pinion mechanism. This substitution achieves superior control accuracy for the closing body's movement trajectory and position while maintaining relative structural simplicity through the use of standard mechanical components and their systematic 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
The solution enables more precise, reliable, and easily controlled movement of the brewing device's closing body, enhancing the brewing process by ensuring accurate trajectories and final positions, thereby improving the overall performance of the brewing apparatus.
Implementation Method 1
a barrel cam, cam followers, and a rack-and-pinion mechanism, which transforms rotational motion into precise translational and rotational movements of the closing body
Implementation Method 2
a barrel cam, cam followers, and a rack-and-pinion mechanism, which transforms rotational motion into precise translational and rotational movements of the closing body
Data Source
AI summary
A brewing device for a beverage preparation machine, in particular coffee or tea, the brewing device includes a frame, a brewing chamber carried by the frame and having a longitudinal axis and a loading/unloading aperture for a brewable material, a closing body movable relative to the frame from and to a closing position for the aperture, and an actuator device to move the closing body. The brewing device further includes a motor and a transmission arranged between the motor and the closing body; the transmission includes a rack-and-pinion mechanism including a driving toothing carried by the frame, and a driven toothing carried by the closing body and meshing with the driving toothing to move the closing body from and to its closing position.