Bushing Puller Assembly With Ball Bearing And Winged Nut
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Solution Overview
Problem
Existing methods for removing bushings from blocks often cause damage and are time-consuming, typically requiring the use of torches which incur significant costs.
Innovation Solution
A bushing puller assembly comprising a bolt with a threaded shaft, a ball bearing, and a nut with a lateral wing, which is used to securely attach to the bolt and stabilize within the block's cavity, allowing for efficient removal of bushings without damaging the block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If torches are used to remove bushings from blocks, then the bushings can be removed, but the block is damaged and significant time and cost are involved
Solution Approach 1:
The patent replaces the thermal field (torch heating) with a mechanical field (screw puller assembly). The mechanical system uses a screw thread mechanism to generate pulling force, eliminating the need for thermal processing and associated damage to the block.
Solution Approach 2:
The patent introduces a bushing puller assembly as an intermediary tool between the bushing and the removal process. This intermediary device provides a controlled mechanical interface that applies force through the bushing's opening, enabling removal without direct contact with the block's external surfaces.
2Productivity
If torches are used to remove bushings from blocks, then the bushings can be removed, but significant time and cost are involved
Solution Approach 1:
The mechanical screw puller system enables direct mechanical extraction of the bushing through threading into the bushing's opening. This eliminates the time-consuming thermal process of heating, cooling, and contraction, allowing for rapid bushing removal through simple rotational operation of the screw mechanism.
3Device complexity
If a simple bolt is used to pull the bushing, then the structure is simple, but the nut cannot be stabilized within the block's cavity
Solution Approach 1:
The patent applies local quality by adding a lateral wing to the nut at the specific location where it interfaces with the block's cavity. This localized structural modification provides stabilization and positioning features within the cavity without requiring complex changes to the entire puller assembly structure.
Solution Approach 2:
The lateral wing creates an asymmetric structure in the nut that provides directional stability within the cavity. The asymmetric wing engages with features in the cavity to prevent rotation and ensure proper positioning, while the rest of the nut maintains its standard symmetric threaded structure for simplicity.
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
Enables quick and cost-effective removal of bushings from blocks without causing damage, accommodating various sizes through the use of different collars, thereby reducing time and expense.
Implementation Method 1
a ball bearing disposed at the first end of the threaded shaft
Implementation Method 2
The nut may be threadedly attached to the first end of the threaded shaft
Data Source
AI summary
A bushing puller assembly may include a bolt and a nut. The bolt may include a threaded shaft having first and second ends, a ball bearing disposed at the first end, and a head disposed at the second end. The nut may be threadedly attached to the first end of the threaded shaft.