Die Lifting Lug Structure With Stopper Ring Pin Retention
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Solution Overview
Problem
Existing die lifting pin structures are prone to arbitrary release during die reversal, leading to safety hazards for workers and potential damage to the lifting pin and associated equipment due to vibration and concentrated loads, with ring-type pins being unreliable and stopper-type pins causing wire damage.
Innovation Solution
A die lifting lug structure featuring a pair of lugs with a detachably mounted lifting pin, where the pin includes a body, fixed ring, and stopper ring supported by a spiral spring, allowing secure attachment and easy release through a pressing block mechanism, ensuring stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a ring-type lifting pin is used, then the lifting pin can be easily attached to the lug, but the lifting pin may be arbitrarily released from the lug during die reversal, causing safety hazards
Solution Approach 1:
The lifting pin transitions from a static ring-type structure to a dynamic structure with a movable stopper ring that can be pushed by a pressing block. The stopper ring moves radially to engage or disengage from the lug, allowing controlled attachment and release while preventing arbitrary release during operation.
Solution Approach 2:
A pressing block is introduced as an intermediary component between the operator and the stopper ring. The pressing block transfers the release force to the stopper ring, enabling controlled detachment while preventing direct manual handling that could cause safety accidents.
2Reliability
If a stopper-type lifting pin is used, then the lifting pin can be securely attached to the lug, but the stopper groove may cause wire damage and the grip may be easily damaged due to concentrated load
Solution Approach 1:
The harmful stopper groove structure is completely removed from the design. Instead of using a groove that concentrates stress and damages wires and grips, the patent uses a stopper ring that distributes the load uniformly around the lifting pin body, eliminating the source of wire and grip damage.
3Ease of operation
If the lifting pin is manually released from the lug by a worker, then the lifting pin can be detached, but worker safety accidents may frequently occur
Solution Approach 1:
The pressing block serves as a safe intermediary tool that workers use to release the lifting pin. Instead of directly handling the lifting pin or stopper ring, workers operate the pressing block which safely transfers force to detach the stopper ring from the lug, preventing safety accidents.
Solution Approach 2:
The lifting pin design enables self-release functionality where the pressing block can easily push the stopper ring out of the lug without requiring complex tools or procedures. The structure allows one-handed operation and simple maintenance.
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 structure enhances worker safety and ease of use by maintaining secure attachment of the lifting pin during die movement and preventing accidental release, while minimizing equipment damage.
Implementation Method 1
The stopper ring may be elastically supported to the support projection by a spiral spring
Implementation Method 2
A central longitudinal axis of the stopper ring may be eccentrically biased from a central longitudinal axis of the body by a spring force of the spiral spring
Implementation Method 3
The support projection may have a predetermined knurl pattern provided on an outer surface thereof, and the inner winding of the spiral spring may frictionally contact the knurl pattern of the support projection
Data Source
AI summary
An embodiment die lifting lug structure includes a pair of lugs protruding from a die and spaced apart from each other and a lifting pin detachably mounted on the pair of lugs, wherein the lifting pin includes a body having a first end surface and a second end surface, a fixed ring fixed to the body, and a stopper ring configured to be movable between the body and the fixed ring in a radial direction of the body, wherein each lug of the pair of lugs includes a through hole configured to allow the body, the fixed ring, and the stopper ring of the lifting pin to pass therethrough.