Lifting Clamp Pivoting Eye for Inverted Hoisting
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Solution Overview
Problem
Conventional lifting clamps lose clamping action or experience reduced clamping force when the hoisting force and operating force are not parallel, limiting their application to specific orientations and preventing use upside down.
Innovation Solution
A lifting clamp design featuring a frame with a slot, a first clamping part rotatably connected to the frame, and an operating arm with a guide pin in a slotted hole, along with a lifting eye pivotably connected to the operating arm, includes mutual stops to allow rotation while maintaining clamping, enabling the hoisting force to work opposite to the operating force, thus ensuring effective clamping even when forces are not aligned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the lifting clamp uses a conventional design where the lifting eye is directly connected to the operating arm, then the structure is simple, but the clamping force is significantly reduced when hoisting in horizontal position or upside down
Solution Approach 1:
The lifting eye is divided into two separate sections: a first lifting eye section connected to the operating arm and a second lifting eye section connected to the load. This segmentation allows the hoisting force to be transmitted through the operating arm while maintaining effective clamping action, resolving the contradiction between structural simplicity and force transmission efficiency
Solution Approach 2:
The operating arm acts as an intermediary element between the hoisting force and the clamping action. By introducing this intermediate component with a specific geometric relationship (angle between 30-60 degrees), the patent enables efficient force transmission in horizontal and inverted positions without significantly increasing overall structural complexity
2Reliability
If the lifting clamp is designed to work only when hoisting force and operating force are parallel, then the clamping action is reliable, but the area of application is limited to specific orientations
Solution Approach 1:
The patent introduces dynamic adaptability by allowing the lifting eye to pivot relative to the operating arm through a hinge connection. This dynamic configuration enables the clamp to maintain reliable clamping action across multiple orientations (vertical, horizontal, inverted) by automatically adjusting the geometric relationship between hoisting and operating forces
Solution Approach 2:
The patent changes the geometric parameter relationship between the lifting eye and operating arm by introducing a hinge with specific pivot characteristics. This parameter change allows the system to adapt to different operating orientations while maintaining force transmission effectiveness, expanding the area of application without sacrificing reliability
3Adaptability or versatility
If the lifting eye is pivotably connected to the operating arm with mutual stops, then the clamp can rotate objects while maintaining clamping, but the device complexity increases
Solution Approach 1:
The patent merges the rotation function and clamping maintenance function into a single hinge mechanism with integrated stops. This combined mechanism allows the lifting eye to pivot for rotation while the stops simultaneously prevent excessive movement that would compromise clamping action, achieving multiple functions without proportionally 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
The design allows for safe operation upside down and maintains clamping action regardless of hoisting force direction, enabling the lifting of heavy loads and manipulation of objects' spatial orientation while ensuring a secure grip.
Implementation Method 1
a lifting eye connected to the operating arm, in which the lifting eye is pivotably coupled to the operating arm by means of an arm in order to exert the operating force of the operating arm under the effect of a hoisting force on the lifting eye which is at an angle of 180 degrees with respect to the direction of the operating force
Implementation Method 2
the hinges of the lifting eye, the arm and the operating arm; respectively, comprise; mutual stops for limiting the pivot angles, thus making it possible to rotate an object to be hoisted while it remains clamped in the lifting clamp
Implementation Method 3
an operating arm, connected to the first clamping part in order to rotate said first clamping part under the effect of an operating force
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a lifting clamp comprising a frame, a first clamping part, rotatably connected to the frame and provided with a first gripping surface, a second clamping part, coupled and/or connected to the frame, provided with a second gripping surface, and arranged with respect to the first clamping part so as to clamp an object between the second gripping surface and the first gripping surface, an operating arm, connected to the first clamping part in order to rotate said first clamping part under the effect of an operating force, a lifting eye, connected to the operating arm, in which the lifting eye is pivotably coupled to the operating arm by means of an arm in order to exert the operating force on the operating arm under the effect of a hoisting force on the lifting eye which is at an angle of 90-180 degrees with respect to the direction of the operating force.