Split Collet Bearing Puller With Thrust Bearing
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Solution Overview
Problem
Existing puller designs for removing bearings, bushings, and gears often result in misalignment, excessive friction, and damage due to inefficient design and space constraints, requiring large clearance areas and lacking self-alignment and anti-friction mechanisms.
Innovation Solution
A split collet puller with a threaded section for precise alignment and a ball thrust bearing on the pressure screw to minimize friction, allowing for secure, efficient, and safe removal of components, even in tight spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional puller designs with t-bar or flange are used, then the puller can apply force to remove bearings, but the puller becomes misaligned with the central axis of the bearing due to uneven bolt tightening, introducing excessive friction and resistance
Solution Approach 1:
The puller assembly automatically self-aligns with the bearing's central axis through the interaction of the V-shaped groove in the collet and the corresponding V-shaped surface on the bearing inner race. The geometry of these surfaces causes the collet to naturally orient itself correctly as it grips the bearing, eliminating the need for manual alignment adjustments and preventing misalignment-induced friction during the removal process.
2Force
If conventional puller designs with large puller arms are used, then the puller can provide leverage for removal, but the puller requires excessive clearance area and cannot fit in tight spaces
Solution Approach 1:
The collet is designed to nest within the bearing inner race, with the collet's outer diameter fitting inside the bearing's inner raceway. This nested configuration allows the puller to apply removal force directly to the bearing without requiring external puller arms that would need significant clearance space, enabling operation in tight spaces where conventional pullers cannot fit.
3Device complexity
If pressure screw without anti-friction bearing is used, then the structure is simpler, but the pressure screw creates undue friction and wear on the bearing shaft during rotation
Solution Approach 1:
An anti-friction bearing is introduced as an intermediary component between the pressure screw and the bearing shaft. This bearing mediates the interaction by providing a low-friction interface that allows the pressure screw to rotate smoothly while applying removal force to the bearing, significantly reducing friction and wear compared to direct contact between the pressure screw and shaft.
4Manufacturing precision
If split collet with threaded section is used, then the collet can be precisely aligned and securely assembled to the bearing, but the manufacturing process becomes more complex
Solution Approach 1:
The collet is designed as a split component that can be assembled around the bearing inner race, with a threaded section that engages with the removal sleeve. This segmentation allows the collet to be precisely positioned and secured to the bearing while maintaining manufacturing feasibility through standard threading and splitting processes, achieving high alignment precision without excessive manufacturing 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 solution provides a robust, centrally aligned tool that reduces friction and stress during removal, enabling easy and accurate operation in tight spaces without damaging the components, ensuring safe and reliable removal of various types of bearings and gears.
Implementation Method 1
Another design integrated into my puller is the ball thrust bearing on the end of the pressure or removal screw. This anti-friction thrust bearing eliminates undue friction and provides very free rotation of the pressure screw.
Data Source
AI summary
A novel and improved puller that provides a safe and efficient manner and tooling to remove bearings, bushings, gears, etc. The invention is simple and highly efficient is its design and use due to incorporating multiple design elements into the main collets or bearing adapters. My present invention uses a simple split collet machined accurately to precisely fit the bearing being removed, in addition the same collet incorporates an upper threaded section to allow the removal sleeve to easily and precisely fit to the collet while at the same time the threaded removal sleeve securely keeps the collet together and properly aligned with the bearing and shaft axis to provide easy and accurate operation. Another design integrated into my puller is the ball thrust bearing on the end of the pressure or removal screw. This anti-friction thrust bearing eliminates undue friction and provides very free rotation of the pressure screw.