Guide Sleeve Clevis Pin Press Tool for Misalignment Removal
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Solution Overview
Problem
Existing clevis pin removal tools are prone to failure due to minor misalignment, especially in inaccessible and corroded brake slack adjusters of heavy vehicles, leading to inefficiency and safety issues.
Innovation Solution
A press tool comprising a base assembly with a drive pin, guide sleeve, and bias member that aligns and displaces the clevis pin along a system axis, ensuring precise engagement and removal by maintaining linear movement through housing and sleeve guide surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional press tool is used to remove clevis pins, then the tool structure is simple, but the tool fails due to misalignment in inaccessible and corroded brake slack adjusters
Solution Approach 1:
The patent introduces a guide sleeve as an intermediary component between the drive pin and the clevis pin. The guide sleeve includes a guide surface that receives the drive pin and maintains alignment, while the housing guide surface in the base assembly guides the guide sleeve. This intermediary structure ensures precise alignment and reliable operation even in inaccessible and corroded brake slack adjusters, resolving the contradiction between tool reliability and structural simplicity.
2Manufacturing precision
If the press tool is designed for precise alignment, then misalignment failure is prevented, but the device complexity increases
Solution Approach 1:
The guide sleeve acts as a precision alignment intermediary, with its guide surface receiving the drive pin and the housing guide surface guiding the guide sleeve itself. This two-stage guidance system achieves high alignment precision without requiring the entire tool structure to be complex, as only the guide surfaces need precise manufacturing.
Solution Approach 2:
The alignment function is segmented into multiple components: the base assembly housing guide surface, the guide sleeve guide surface, and the drive pin. Each component has a specific guidance function, allowing precision to be distributed across multiple simpler parts rather than requiring one highly complex alignment mechanism.
3Ease of manufacture
If the tool structure is simplified, then manufacturing is easier, but the tool cannot handle inaccessible and corroded components effectively
Solution Approach 1:
The guide sleeve serves as a robust intermediary that adapts to adverse conditions. Its cylindrical structure with guide surfaces provides reliable alignment even when accessing corroded and inaccessible brake slack adjusters. The bias member (spring or damper) within the guide sleeve accommodates variations in component condition, enhancing adaptability without significantly complicating manufacturing.
Solution Approach 2:
The bias member (spring or damper) introduces dynamic characteristics to the guide sleeve, allowing it to adapt to varying conditions in inaccessible and corroded components. The spring or damper can compensate for misalignment and variations in component geometry, enhancing the tool's versatility in adverse service conditions.
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 tool effectively and reliably removes clevis pins from brake slack adjusters, overcoming misalignment and corrosion challenges, enhancing serviceability and safety in heavy vehicles.
Implementation Method 1
The bias member is arranged at least partly within the housing cavity to bias the guide sleeve relative to the base member
Data Source
AI summary
A press tool comprising a base assembly, a drive pin, a bias member, and a guide sleeve defining a sleeve guide surface. The base assembly comprises a base member defining a housing guide surface, a system axis, and a housing cavity. The guide sleeve is supported by the base member such that at least a portion of the guide sleeve is within the housing cavity. The bias member is arranged within the housing cavity to bias the guide sleeve relative to the base member. The base assembly supports the guide sleeve such that at least a portion of the guide sleeve and the bias member within the housing cavity. The base assembly supports the drive pin for movement along the system axis. The housing guide surface engages the guide sleeve. The sleeve guide surface engages the drive pin.