Hub Pulling Device for Skid-Steer Axel Removal
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Solution Overview
Problem
The maintenance of skid-steer loaders is hindered by the difficulty in removing stuck hubs from axels, particularly in cold, wet, and dirty environments, where conventional methods like hammers and torches are often required, necessitating a more efficient and safer solution.
Innovation Solution
A hub pulling device featuring a circular plate with a center bore and pin mechanism that applies opposing forces to the axel when tightening lug nuts, allowing for the secure engagement and removal of the hub, with optional spacers for larger hubs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional removal methods (hammers, bottle jacks, torches) are used to remove the hub from the axel, then the hub can be removed, but the operation becomes complex, time-consuming, and potentially harmful to surrounding components
Solution Approach 1:
The removal device is segmented into distinct functional components: a pulling device with engagement elements for the hub, a pushing device with engagement elements for the axel, and a force application mechanism. This segmentation allows each component to perform its specific function independently, simplifying the overall operation while maintaining effectiveness in removing stuck hubs from axels
Solution Approach 2:
The patent introduces an intermediary removal device that mediates between the user and the stuck hub-axel connection. Rather than directly applying force with hammers or torches, the intermediary device provides controlled opposing forces through its pulling and pushing components, making the removal process safer and easier while reducing complexity
2Productivity
If drastic removal measures (hammers, torches) are applied to separate the hub from the axel, then the hub can be removed, but harmful factors increase and reliability decreases
Solution Approach 1:
The removal device applies preliminary opposing forces in controlled directions before complete separation occurs. The pulling device engages the hub and applies outward force, while the pushing device engages the axel and applies inward force, creating a controlled anti-action that prevents the hub from damaging surrounding components during removal
Solution Approach 2:
The patent converts the harmful stuck condition into a beneficial controlled separation process. By engaging both the hub and axel with opposing forces, the device transforms the problematic adhesion into a controlled mechanical separation that protects surrounding components while maintaining high productivity
3Ease of operation
If a simple removal method is used, then operation is easier, but the device lacks the strength and precision to remove stuck hubs in cold, wet, and dirty environments
Solution Approach 1:
The patent merges the pulling function and pushing function into a single integrated removal device. The pulling device and pushing device work together as a combined system, with the force application mechanism coordinating both actions simultaneously. This merging provides both the simplicity of a single device and the combined strength of multiple force application methods
Data Source
AI summary
A hub pulling device for the removal of a hub from the axel of a vehicle. The device includes a pin and plate. The plate having a central bore having a sidewall supported by a plurality of gussets. The plate containing a plurality of apertures aligned to be received on the lug bolts of the hub. The pin having a head sized for receipt within the hub center and engagement of the axel and a shaft sized for receipt within the central bore. To remove a hub, the pin is placed within the central bore and the plate is mounted to the lug bolts using the lug nuts, the opposed force of the pin pushing on the axel and the plate pulling the hub frees the hub.