Eccentric Locking Mechanism for Granulator Housing Alignment
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Solution Overview
Problem
Existing granulating devices for thermoplastic materials face challenges in ensuring precise and reproducible connection between the cutting chamber housing and the blade drive housing, while also preventing operator injury from rotating blades during assembly or operation.
Innovation Solution
A granulating device with a clamping collar and eccentric closure element that uses a fitting cam and index opening for secure, one-handed connection and operation, ensuring the blade drive device can only be started when the housing parts are tightly connected and the blade is stationary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutting chamber housing and knife drive housing are connected using traditional fastening methods, then the connection can be secure, but the positioning precision and reproducibility of the housing parts are difficult to ensure
Solution Approach 1:
A clamping sleeve is introduced as an intermediary component between the cutting chamber housing and knife drive housing. The clamping sleeve features an index opening that aligns with a locating cam in the closed position, serving as a mechanical mediator that ensures precise and reproducible positioning of the housing parts while maintaining a relatively simple connection mechanism.
2Ease of operation
If the housing parts are made easily detachable for knife replacement, then the ease of operation improves, but the risk of accidental separation during operation increases
Solution Approach 1:
The connecting element with the clamping sleeve and eccentric locking element is designed to be operable by a single operator with one hand. The eccentric locking element automatically engages with the index opening when the clamping sleeve is closed, providing self-locking functionality that ensures reliable connection without requiring complex multi-step procedures or additional safety devices.
3Ease of operation
If traditional locking mechanisms are used, then the connection can be secure, but multiple hands or operators are required to operate them safely
Solution Approach 1:
The eccentric locking element acts as a mechanical intermediary that translates the closing motion of the clamping sleeve into a locked position. The index opening and locating cam arrangement ensures that the locking action occurs automatically as part of the closing motion, enabling single-operator operation while maintaining reliable safety interlocking.
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 provides a safe and reliable, precisely reproducible connection between housing parts, allowing single-operator operation while preventing blade-related injuries by ensuring the blade drive device is only operational when securely locked.
Implementation Method 1
an eccentric locking element, wherein the eccentric locking element is connected to respective sections of the clamping sleeve
Implementation Method 2
the eccentric locking element has at least one index opening which, in a closed position, is aligned with a locating cam, which then passes through the index opening
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
A granulating device for producing pellets from a plastic material can have a die plate, a cutting chamber housing adjoining the die plate, and a cutting device with a cutter. The cutting device can be driven via a cutter shaft by a cutter drive device located in a cutter drive housing. The cutting chamber housing can have a cutting chamber housing flange section connected with a cutter drive housing flange section of the cutter drive housing by a connecting element. The connecting element can have a clamping collar arranged to enclose at least one section of the flange sections, and an eccentric closure element. The eccentric closure element can be connected to the clamping collar, and can have an index opening. In a closure position, the index opening can be located in alignment with a locating pin that passes through the index opening.