Synchronized Claw Puller for Long-Stroke Annular Removal
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Solution Overview
Problem
Conventional pullers for removing annular elements from axles are inefficient, hazardous, and require multiple phases of operation due to independent claw engagement and limited stroke, posing safety risks and inefficiencies.
Innovation Solution
A puller design featuring a collar with synchronized claws, a synchronizer, and an abutting assembly, allowing for a long stroke operation by pivotally connecting claws to the collar and using a synchronizer to control their opening and closing, integrated with a hydraulic or pneumatic system for efficient detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pullers use independent claws without interconnection, then the structure is simple, but the claws may disengage accidentally from the annular element causing safety hazards
Solution Approach 1:
The patent combines multiple claws into a unified structure where they are interconnected through a common collar assembly. The claws share common pivotal connectors and a synchronizing mechanism ensures they move together as a coordinated unit, preventing accidental disengagement while maintaining structural integration.
2Length of moving object
If a threaded rod is used to move the annular element, then a long stroke is achieved, but the rotation operation is inefficient
Solution Approach 1:
The patent replaces the threaded rod's rotational mechanical system with a direct linear extension mechanism. The abutting assembly extends linearly along the axial direction without requiring rotation, converting the operational mode from rotational-to-linear conversion to direct linear motion, thereby improving efficiency while maintaining long stroke capability.
3Speed
If a hydraulic device is used to extend the piston rod, then the extension is fast, but the stroke is short requiring multiple phases
Solution Approach 1:
The patent merges the advantages of both threaded rod and hydraulic device by combining a fast-extension mechanism with a long-stroke abutting assembly. The abutting assembly is designed to provide both rapid extension speed and sufficient stroke length in a single continuous operation, eliminating the need for multiple phases while maintaining high speed.
4Reliability
If the synchronizer closes the claws by protuberances, then the claws are synchronized, but the synchronizer structure becomes complex
Solution Approach 1:
The patent uses protuberances on the synchronizer as intermediary elements that engage with corresponding recesses on the claws. These protuberances act as simple mechanical mediators that transmit motion from the synchronizer to the claws, ensuring synchronized movement without requiring complex linkage mechanisms or additional actuating systems.
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 ensures safe, efficient, and convenient detachment of annular elements with a single-phase operation, reducing user hazards and operational inefficiencies by synchronizing claw movement and extending the stroke length.
Implementation Method 1
The synchronizer includes a receiving portion for receiving the protuberances. The synchronizer is movable in the collar between an opening position and a closing position. In the opening position, the synchronizer opens the claws by the protuberances. In the closing position, the synchronizer closes the claws by the protuberances.
Implementation Method 2
The abutting assembly is extensible from the collar. The abutting assembly is inserted in the screw hole of the collar.
Data Source
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AI summary
A puller includes a collar, claws, a synchronizer and an abutting assembly. The collar includes slots and pivotal connectors located corresponding to the slots. The claws are pivotally connected to the pivotal connectors. Each of the claws includes a protuberance movable in a corresponding one of the slots. The synchronizer includes a receiving portion for receiving the protuberances. The synchronizer is movable in the collar between an opening position and a closing position. In the opening position, the synchronizer opens the claws by the protuberances. In the closing position, the synchronizer closes the claws by the protuberances. The synchronizer is extensible from the collar.