Screw Conveyor Coupling Ring for Tool-Free Shaft Locking
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Solution Overview
Problem
Conventional coupling devices for screw conveyors in plastics processing machines are complex, difficult to access, and require tools for operation, leading to potential damage and malfunction due to limited space and unclear seating of components.
Innovation Solution
A coupling device with a hand-operable ring that allows for intuitive locking and unlocking of the screw conveyor shaft with the drive shaft, using spring-loaded holding elements that can be controlled radially, eliminating the need for tools and ensuring secure coupling without damaging other machine elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coupling devices are used, then the conveyor screw can be coupled to the drive shaft, but the structure becomes complex and difficult to access
Solution Approach 1:
The coupling device is divided into two separate coupling parts: one attached to the conveyor screw and another to the drive shaft. Each part has simplified structure with locking elements that engage with each other, avoiding the need for a single complex coupling mechanism while maintaining reliable connection.
Solution Approach 2:
The coupling device is designed to be removable and detachable from both the conveyor screw and drive shaft. This extraction capability allows the coupling to be easily removed when not needed, simplifying the overall system configuration and reducing complexity during operation.
2Reliability
If conventional coupling devices are used, then the conveyor screw can be locked to the drive shaft, but the operation becomes difficult and requires tools
Solution Approach 1:
The coupling device uses spring-loaded locking elements that automatically engage with recesses in the opposing coupling part when brought together. This self-locking mechanism eliminates the need for tools or complex manual operations, as the coupling secures itself through spring force when the components are aligned.
3Reliability
If the conveyor screw is tightly fastened to ensure secure coupling, then rotational movement is transmitted reliably, but the drive shaft cannot rotate during tightening
Solution Approach 1:
The coupling device transitions from a static fastening approach to a dynamic locking mechanism. During assembly, the coupling parts are brought together and the spring-loaded locking elements automatically engage with the recesses, allowing the drive shaft to rotate freely during the process while ensuring secure torque transmission once locked.
4Ease of operation
If the conveyor screw is loosened for removal, then the screw can be detached, but the drive shaft rotates due to loosening torque
Solution Approach 1:
The spring-loaded locking elements automatically disengage from the recesses when the coupling is loosened, allowing the drive shaft to remain stationary without requiring external securing measures. The spring force naturally maintains the locked position during operation and allows easy release when needed.
5Volume of stationary object
If the coupling device is located in a confined space, then the machine structure is compact, but visual inspection and monitoring become difficult
Solution Approach 1:
The coupling device incorporates visual indicators such as colored markings or position indicators that change appearance or position based on the coupling state. These indicators are visible from the outside of the compact structure, allowing operators to verify correct seating and locking status without needing to access confined internal spaces.
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, tool-free operation and secure coupling of the screw conveyor shaft with the drive shaft, reducing wear and ensuring correct alignment, even in confined spaces, with low operating forces and enhanced safety features.
Implementation Method 1
mit wenigstens einem beweglichen, federbelasteten Halteelement (30), mit dem die radiale Lenkbewegung in eine radiale Bewegun
Data Source
Figure 1a~1c
Figure 2a~2c
AI summary
A coupling device (10) for a screw conveyor and a drive driving it in a plastics processing machine serves to positively engage a screw conveyor shaft (20) with a drive shaft (140). In the coupled state, to lock the screw conveyor shaft (20) with the drive shaft, at least a part (35) of at least one movable, spring-loaded retaining element (30) of the coupling device (10) can be guided radially into at least one recess of the screw conveyor shaft (20) and/or against at least one projection (40) of the screw conveyor shaft (20) in the direction of an axial axis (50) extending through the screw conveyor shaft (20), the coupling device (10), and the drive shaft.The coupling device (10) can be operated intuitively without tools even under adverse environmental conditions, is easy to lock and unlock, has no negative effects with regard to the rotation of drive shafts and avoids damage to other elements.