Kitchen Appliance Coupling Head for Tool and Accessory Torque Transfer
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Solution Overview
Problem
Existing food processor coupling devices lack flexibility in coupling different tools and accessories, limiting their multifunctional use and efficient torque transmission.
Innovation Solution
A coupling device with a drive head featuring a first bayonet connection for non-rotatable coupling of tools and a driving profile for torque transmission to accessory input shafts, allowing for various tool and accessory attachments and efficient rotation of tools about the central axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple bayonet coupling is used to attach tools, then the coupling is simple and quick, but it cannot provide sufficient torque transmission to accessory input shafts
Solution Approach 1:
The patent combines two coupling mechanisms into a single integrated coupling device: a bayonet coupling for quick attachment and a drive profile with teeth for torque transmission. The drive shaft incorporates both the bayonet coupling elements (lugs and grooves) and the toothed drive profile, allowing simultaneous achievement of easy coupling and sufficient power transmission to accessory input shafts.
2Device complexity
If a single coupling mechanism is used, then the device structure is simple, but it cannot accommodate both tools and accessories with different coupling requirements
Solution Approach 1:
The coupling device is designed with multi-functionality to accommodate both tools and accessories. The drive head can directly drive tools via bayonet coupling, while also engaging with accessory input shafts through the toothed drive profile. This universal design allows the same coupling device to interface with different tool and accessory types without requiring separate coupling mechanisms.
Solution Approach 2:
The coupling device segments the coupling functions into distinct elements: the bayonet coupling portion for attachment and the toothed drive profile portion for torque transmission. This segmentation allows each element to be optimized for its specific function while working together as an integrated system that handles both tools and accessories.
3Power
If tools are directly coupled to the drive shaft, then torque transmission is efficient, but the tools cannot be easily detached and reconfigured
Solution Approach 1:
The bayonet coupling mechanism provides dynamic coupling that allows tools to be quickly attached and detached. The lateral lugs engage with the drive shaft grooves to provide secure torque transmission during operation, while the spring-loaded retention mechanism maintains engagement during use but allows rapid release when needed, enabling easy reconfiguration of tools.
Data Source
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AI summary
A coupling device for a kitchen appliance is described, which has a drive head which is connected to a driven shaft of the kitchen appliance and which has a first bayonet connection for the non-rotatable coupling of the drive head to a tool. The coupling device comprises a stationary connection piece, arranged wholly or partially around the drive head, for mechanically coupling an accessory to the coupling device, and the drive head has a driving profile. The coupling device allows both a tool to be coupled and an accessory to be connected.