Puller Driving Structure for Bearing Installation Stability
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Solution Overview
Problem
Existing bearing installation tools face issues with shifting and instability during the installation process, leading to potential damage and wear-out of components due to uneven pressure distribution and lack of balance between the bearing and spindle.
Innovation Solution
A puller driving structure featuring multiple slide rods and resilient elements that evenly disperse pressure, ensuring better concentricity and balance by using a hydraulic driving device with a connecting module, actuating element, and position resuming module to stabilize the actuating element and prevent deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single spring is used to press the slide base, then the structure is simple, but the push rods shift due to biased bearing pressure, reducing stability and causing bearing deviation
Solution Approach 1:
The single spring is divided into multiple springs (first spring and second spring), and the single push rod is segmented into multiple push rods (first push rod and second push rod). This segmentation allows the pressure to be distributed evenly across multiple contact points, preventing biased bearing pressure and push rod shifting, thereby improving installation stability while maintaining reasonable structural complexity.
2Force
If manual driving device with longer arm of force is used, then the driving capability is improved, but the radius of gyration becomes too large for narrow spaces
Solution Approach 1:
The driving mechanism transitions from a planar rotation system to a three-dimensional telescopic system. The driving rod can extend and retract along the axial direction, providing sufficient driving force through linear motion rather than rotational motion. This dimensional change allows the device to operate in narrow spaces where rotational movement is constrained, while still delivering adequate driving capability through the telescopic action of the driving rod.
3Force
If hydraulic pump with extension rod is used, then the driving force is sufficient, but the slide base and push rods become unstable during bearing installation
Solution Approach 1:
The single-point pressure application is segmented into multiple pressure points through the use of multiple springs and push rods. The first spring acts on the first push rod, and the second spring acts on the second push rod, creating a distributed support system. This segmentation stabilizes the slide base by preventing unilateral pressure shifts and ensures that the bearing is pressed evenly without causing instability during installation.
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 effectively disperses pressure across multiple resilient elements, maintaining balance and concentricity during bearing installation and removal, reducing the risk of component wear and damage.
Implementation Method 1
a first spring (421) disposed at an end of the driving rod (13) away from the hydraulic driving device (1), and a second spring (422) disposed at a center of the driving rod (13), the first spring (421) and the second spring (422) being respectively pressed by a slide base (42)
Data Source
AI summary
A puller driving structure is connected to a fixing module and a propping module for installing or removing a bearing, and the structure connects a hydraulic driving device with a connecting module, and the connecting module is connected to a plurality of slide rods and a plurality of resilient elements of a position resuming module, such that an actuating element is actuated on each slide rod, and the hydraulic driving device presses and moves the actuating element, and each resilient element presses and props the actuating element in an opposite direction to resume its original position, so as to achieve a better balance during the use of the puller driving structure provides a better concentricity for the bearing and the spindle.