Juice Press Linkage Design to Reduce Hinge Stress and Lever Breakage
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Solution Overview
Problem
Existing citrus presses suffer from stress and strain concentration at the hinge area, leading to potential breakage, and inefficient force application that can result in bending or breaking of the lever arm.
Innovation Solution
A juice press design featuring a lower handle with a cup for receiving fruit, an upper handle rotatably coupled to the lower handle, and a press pivot with a press plate that distributes force through a linkage to the center of the fruit, reducing stress on the handles and improving force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a hinge is placed at the outermost end of the lever arm to interface with the cup, then the lever arm can be simplified in structure, but stress and strain concentrate at this location increasing the likelihood of breakage
Solution Approach 1:
A press pivot is introduced as an intermediary component between the lever arm and the cup. The press pivot includes a press plate that interfaces with the cup rather than the lever arm directly, distributing stress away from the hinge connection and reducing the likelihood of breakage while maintaining structural simplicity
2Device complexity
If the lever arm directly applies force to the fruit, then the structure is simple, but the lever arm may bend or break over time and force application efficiency is minimized
Solution Approach 1:
The press pivot acts as a mediator between the lever arm and the fruit. Instead of the lever arm directly contacting and forcing the fruit, the press pivot transfers the force through its press plate, which concentrates force at the center of the fruit while protecting the lever arm from bending or breaking
Solution Approach 2:
The press plate of the press pivot is designed to concentrate force locally at the center of the fruit. This localized force concentration improves juicing efficiency while the press pivot structure distributes the overall stress, preventing lever arm failure
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 design enhances the efficiency and effectiveness of the juicing process by concentrating force at the center of the fruit, reducing the likelihood of mechanical failure, and improving the reliability of the juice press.
Implementation Method 1
The force on the upper handle is distributed to the press pivot via the linkage and the press plate with the linkage generally being positioned at a center of the press pivot to concentrate force on the center of the food product
Implementation Method 2
concentrate force on the center of the food product and improve the efficiency and effectiveness of the juicing process
Data Source
AI summary
A juice press includes a lower handle with a cup that receives a food product to be juiced, such as half of a citrus fruit. The lower handle is rotatably coupled to an upper handle that is manipulatable between an open position and a closed position. A press pivot is rotatably coupled to the lower handle and to the upper handle and includes a press plate. A linkage is rotatably coupled between the upper handle and the press plate of the press pivot. Force applied to the upper handle is concentrated to a center of the press pivot and thus a center of the food product via the linkage and press plate to improve efficiency and effectiveness of juicing the food product.