Compact Traction Drive Tensioning for Slack-Side Sag Control
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Solution Overview
Problem
Existing tensioning devices for rotating traction mechanisms in machines, such as beverage filling and packaging machines, face challenges in maintaining consistent tension, leading to potential sag and uncontrolled movements due to wear and elongation, and require significant installation space.
Innovation Solution
A compact tensioning device with a hub anchored to a stationary frame and an elastically flexible sliding section that prestresses the traction mechanism, allowing for adjustable and reliable tensioning, including the use of a deformable arm and optional sensor for monitoring, to prevent overloading and ensure smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional tensioning devices (lever clamps, spring-loaded clamping elements, hydraulically assisted clamping devices) are used, then reliable tensioning is achieved, but the installation space requirement increases significantly
Solution Approach 1:
The patent employs a flexible membrane element that can be integrated into the tensioning device structure. This membrane provides the necessary elastic deformation capability to maintain tension while occupying minimal space, replacing traditional voluminous spring or hydraulic components.
Solution Approach 2:
The invention utilizes elastic deformation parameter changes of a compact structural element (the membrane or flexible component) to achieve tensioning. By changing the deformation state of this element, the device can reliably tension the traction mechanism without requiring large installation space.
2Reliability
If manual adjustment of chain tension is performed, then tension can be maintained despite wear and elongation, but operational complexity and time consumption increase
Solution Approach 1:
The tensioning device is designed to automatically maintain proper tension through the elastic deformation of its membrane component. As the traction mechanism experiences wear or elongation, the membrane self-adjusts its deformation state to compensate, eliminating the need for manual intervention and maintaining consistent tension automatically.
Solution Approach 2:
The elastic membrane element provides continuous feedback through its deformation state, automatically sensing and compensating for changes in traction mechanism tension. This self-regulating mechanism ensures consistent tension without requiring manual adjustment or external control systems.
3Strength
If rigid tensioning structures are used, then structural strength is sufficient, but the ability to yield and prevent over-tensioning is reduced
Solution Approach 1:
The flexible membrane element serves as a yieldable component that can deform elastically under excessive load conditions. This flexibility provides overload protection by allowing the structure to give way safely, preventing damage to more critical components while maintaining sufficient structural strength for normal operation.
Solution Approach 2:
The elastic membrane component acts as a pre-designed cushioning element that absorbs and dissipates excessive forces before they can cause damage. This beforehand cushioning mechanism protects the tensioning system from overload while maintaining structural integrity during normal operation.
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 compact, easily adjustable, and reliable tensioning system that maintains necessary tension, reduces sag and vibrations, and prevents overloading, ensuring smooth operation and extended machine lifespan.
Implementation Method 1
an elastically flexible sliding section, which interacts with the traction means in its slack side and pre-tensions it between two deflections
Data Source
Figure 1
Figure 2A~2B
Figure 2C
AI summary
A clamping device (10) for a rotating traction drive (12) with at least one traction element (14) guided via deflections is disclosed, wherein the traction drive (12) is part of a conveying or drive unit within a machine environment (16). The clamping device (10) comprises a hub (36) anchored to a stationary component of the machine environment (16) in the region of a slack section (30) of the rotating traction element (14), to which an elastically compliant sliding section (38) is attached in a lever-like manner, which interacts with the traction element (14) in its slack section (30) and pre-tensions it between two deflections.Furthermore, a beverage filling and/or packaging machine (18) is disclosed, comprising at least one rotating traction drive (12) with at least one traction element (14) guided via deflections, in particular a chain or belt drive for a conveying or drive unit within the filling and/or packaging machine (18). The machine is equipped with a tensioning device (10) which is associated with a slack side (30) of a rotating traction element (14) of a traction drive (12).