Rotatable Lifting Point With Tool-Free Torque-Locking Coupling
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Solution Overview
Problem
Existing attachment points with roller bearing bodies cannot achieve a torque-locking coupling between the upper and lower parts, and they lack the ability to decouple the rotational drive, making them difficult to handle and align, especially when wearing gloves, and they often require additional tools for secure connection.
Innovation Solution
An attachment point design featuring a coupling bolt adjustable in the radial direction, held in the outer bearing part, with a rotary driving contour accessible radially on the inner bearing part, and a restoring element to facilitate tool-free torque-locking coupling, allowing the upper part to be freely rotated when not actuated, and easily engaged when needed, with markings for alignment assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking pin with adjusting lever is used to achieve torque-locking coupling, then the coupling between upper and lower parts is secured, but the device complexity increases and the ease of operation deteriorates due to difficulty in grasping when wearing gloves
Solution Approach 1:
The invention extracts the coupling function from a complex locking pin mechanism with adjusting lever and simplifies it to a simple coupling bolt that can be easily grasped and operated even when wearing gloves, while maintaining the torque-locking coupling reliability
Solution Approach 2:
Instead of using a complex locking mechanism to achieve coupling, the invention inverts the approach by using a simple bolt that directly engages with the rotary driving contour, eliminating the need for additional locking components and improving ease of operation
2Reliability
If rotary driving cams protruding inward are used to engage with the rotary driving contour, then the torque-locking coupling is achieved, but the device complexity increases and alignment becomes difficult
Solution Approach 1:
The invention removes the complex rotary driving cams protruding inward and replaces them with a simpler coupling bolt that engages directly with the rotary driving contour, reducing device complexity and making alignment more intuitive
Solution Approach 2:
The invention changes the engagement approach from a complex three-dimensional cam mechanism to a simpler linear bolt engagement that aligns with the rotary driving contour, reducing alignment difficulty
3Ease of operation
If the upper part is coupled to the lower part in a torque-locking manner for tool-free connection, then the ease of operation is improved, but the device complexity increases due to additional coupling mechanisms
Solution Approach 1:
The invention merges the coupling function with the existing rotary driving contour by having the coupling bolt engage directly with it, eliminating the need for separate coupling mechanisms and maintaining tool-free operation
Solution Approach 2:
The coupling bolt serves multiple functions: it provides the coupling mechanism, engages with the rotary driving contour for tool-free connection, and maintains simplicity while achieving torque-locking, demonstrating multi-functionality without increasing complexity
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 and ergonomic handling with reduced manufacturing costs, allowing for independent actuation of multiple coupling devices, requiring minimal force (about 20 Nm) for hand-tight tightening, and supports various attachment point designs, including those with roller bearing bodies, while allowing for secure tool-assisted connections when needed.
Implementation Method 1
at least one restoring element acts on the coupling bolt such that: when the coupling bolt is actuated to bring about the torque-locking coupling of the upper and lower parts, the coupling bolt is moved against the force of the restoring element
Data Source
AI summary
An attachment point with a lower part having a threaded bolt for connecting the attachment point to an object to be handled, and with an upper part which is rotatable relative to the lower part and connected thereto. The upper part has a connecting element for connecting a lifting, attachment or lashing means. One of the two parts as an outer bearing part encloses at least one axial portion of the other part as an inner bearing part. The attachment point has coupling means for torque-locking coupling of the upper and lower parts for the purpose of tool-free connection of the attachment point to the object. The coupling means comprises a radially adjustable coupling bolt held in the outer bearing part, and, on the inner bearing part, at least one rotary driving contour accessible in the radial direction and acting in the circumferential direction, with which contour the actuated coupling bolt engages to bring about the torque-locking coupling of the upper and lower parts.