Synchronized Claw Puller for Safer Multi-Size Bearing Removal
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Solution Overview
Problem
Conventional pullers are hazardous due to independent claw engagement, limited in size versatility, and require multiple purchases for different sizes, making them inefficient and inconvenient.
Innovation Solution
A puller design featuring a collar with pivotally connected claws, a synchronizer, and a threaded rod, where the synchronizer moves between opening and closing positions to synchronize claw pivoting and accommodate various sizes, and an extensive element for increased operation stroke.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If claws are independently connected to the collar, then the structure is simple, but the claws may disengage accidentally causing safety hazards
Solution Approach 1:
The patent connects multiple claws to a common synchronizer body instead of independently to the collar. The synchronizer body acts as an intermediate connecting structure that synchronizes the movement of all claws, ensuring they engage and disengage together, thus eliminating accidental disengagement while maintaining structural simplicity.
2Stability of the object's composition
If lugs of the synchronizer are inserted in slots of the claws, then the pivoting of claws is synchronized, but the pivoting angle is limited to a small angle
Solution Approach 1:
The patent replaces the rigid slot-lug connection with a dynamic spherical joint mechanism. The spherical joint allows the claws to pivot through a larger angle while maintaining synchronization through the common synchronizer body, enabling the puller to accommodate annular elements of various sizes.
3Stability of the object's composition
If lugs of the synchronizer are inserted in slots of the claws, then the claws are synchronized, but it is difficult to replace claws with different lengths
Solution Approach 1:
The patent designs the claws as separable components that can be independently removed and replaced. The spherical joint connection allows claws to be detached from the synchronizer body without affecting other claws, enabling easy replacement with claws of different lengths to suit various annular element sizes.
4Device complexity
If a single puller design is used, then the structure is simple, but it is not suitable for detaching annular elements of various sizes
Solution Approach 1:
The patent creates a universal puller design where the synchronizer body with spherical joints can accommodate claws of different lengths and configurations. This single puller structure can handle annular elements of various sizes by simply replacing the appropriate claws, eliminating the need for multiple specialized pullers.
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 enhances safety, efficiency, and convenience by ensuring synchronized claw operation, allowing for easy size adjustments and a wide range of annular element sizes without the need for multiple puller purchases.
Implementation Method 1
The threaded rod is rotated relative to the collar 90 to move the collar 90 and the claws 91 away from the axle
Implementation Method 2
A spring 95 is compressed between the synchronizer 96 and the collar 90. The spring 95 moves the synchronizer 96 away from the collar 90. The synchronizer 96 opens the claws 91 as the lugs 98 move along the slots 92
Data Source
AI summary
A puller includes a collar, claws, a synchronizer and a threaded rod. The collar includes a space, a screw hole in communication with the space, slots in communication with the space, 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 and along 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 threaded rod is inserted in the screw hole of the collar.