Mounting and drive device for tools in a food processor
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Solution Overview
Problem
Existing food processor mounting and drive systems fail to reliably secure rotatable tools at different rotational speeds and directions, leading to potential ejection during operation.
Innovation Solution
A mounting and drive device with a rotatable hollow shaft and a coupling piece, utilizing spring-loaded pressing bodies to securely lock tools in place, allowing for different rotational speeds and directions, and featuring a gear unit with planetary gears to manage various tool requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-speed drive system is used, then the device structure is simple, but it cannot accommodate tools requiring different rotational speeds
Solution Approach 1:
The drive system is segmented into two independent drive paths: one through the hollow shaft for first-type tools, and another through the coupling piece for second-type tools. Each path can operate at different rotational speeds, allowing the system to accommodate diverse tool requirements while maintaining a relatively compact structure.
Solution Approach 2:
The mounting and drive device is designed with universal functionality to accommodate both first-type tools (driven through the hollow shaft) and second-type tools (driven through the coupling piece). The system can selectively engage different tool types with their respective drive mechanisms, providing multi-functionality without requiring completely separate systems.
2Adaptability or versatility
If tools are driven at different rotational speeds, then tool versatility is improved, but reliable locking becomes difficult
Solution Approach 1:
The pressing bodies are designed to be dynamically adaptable to different rotational speeds. When a tool shaft rotates at a different speed than the driving element, the pressing bodies automatically adjust their radial position, pressing against the tool shaft to provide both locking and bearing functions. This dynamic adaptation maintains reliable securing regardless of speed differences.
Solution Approach 2:
The pressing bodies act as intermediaries between the driving elements (hollow shaft or coupling piece) and the tool shafts. They transmit the driving force while accommodating speed differences and providing secure locking. The pressing bodies mediate the interaction between components with different rotational speeds, enabling reliable power transmission without direct rigid coupling.
3Reliability
If pressing bodies are used to lock tools, then tool securing is improved, but the pressing bodies wear against the tool shaft
Solution Approach 1:
The pressing bodies dynamically adapt to the rotational speed of the tool shaft, pressing against it to provide both locking and bearing functions. This dynamic interaction distributes wear more evenly and reduces stress concentrations, extending the service life of the pressing bodies while maintaining reliable locking.
Solution Approach 2:
The pressing bodies are designed to change their operational parameters (radial position, contact pressure) based on the rotational speed differential between the driving element and the tool shaft. By adjusting these parameters dynamically, the system optimizes the balance between locking reliability and wear reduction, extending component life.
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
Ensures tools are securely fixed and operational at different speeds and directions, preventing ejection and enabling efficient operation of diverse tools like kneading hooks and whisks.
Implementation Method 1
at least one spring element, the spring force of which can be used to press the at least one pressure body radially inward through the associated recess in the hollow shaft
Data Source
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AI summary
The invention relates to a mounting and drive device for rotatable tools for a food processor. The mounting and drive device comprises a rotatable hollow shaft (24) with a first fitting receiving area (39) for receiving a first tool type and an additional coupling piece (22) with a second fitting receiving area (45) for receiving a second tool type, said coupling piece being mounted above the hollow shaft (24). The mounting and drive device additionally comprises at least one pressing body (40), which is arranged on or in at least one corresponding recess (41) of the hollow shaft, and at least one spring element (42), via the spring force of which the at least one pressing body (40) can be pressed radially inwards through the corresponding recess (41) in the hollow shaft (24). A reliable fixation in the axial direction is allowed by the elastically supported pressing body even when using tools which rotate at different speeds.