Jack Assembly Secondary Support Telescoping Locking Mechanism
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Solution Overview
Problem
Conventional jack assemblies lack a reliable secondary support mechanism to maintain load stability in case of primary support failure, such as mechanical failure or hydraulic fluid leakage, which can lead to unsafe and inconvenient operation.
Innovation Solution
The jack assembly incorporates a secondary support assembly with telescoping supports and pawl projections that lock into place at various heights, providing a load path independent of the primary support, allowing the jack to maintain load stability and adjustability, and includes a control mechanism for easy telescoping and locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional jack assembly uses only a primary support assembly, then the device complexity is reduced, but the reliability of load support deteriorates due to lack of secondary support mechanism
Solution Approach 1:
The support system is divided into independent primary and secondary support assemblies. The primary support assembly handles normal operation while the secondary support assembly provides backup functionality. This segmentation allows each assembly to be simpler individually while the combined system achieves higher reliability through functional separation and redundancy.
2Reliability
If a secondary support assembly is added to provide backup support, then the reliability improves, but the ease of operation deteriorates due to additional components and mechanisms
Solution Approach 1:
The secondary support assembly is designed to automatically engage and provide support when the primary support assembly fails or when additional support is needed. The system self-regulates by activating the backup mechanism without requiring manual intervention, thereby maintaining ease of operation while improving reliability.
3Adaptability or versatility
If telescoping supports with multiple locking positions are used, then the adaptability for different heights improves, but the device complexity increases due to multiple pawl-projection locking mechanisms
Solution Approach 1:
The telescoping support with pawl-projection locking mechanisms serves multiple functions: it provides structural support, enables height adjustment, and maintains position stability. The same locking mechanism handles both the telescoping action and the positioning function, reducing overall system complexity while achieving multi-functionality.
Data Source
AI summary
A jack assembly includes a jack base and a primary support assembly. The primary support assembly includes a lift arm movably coupled to the jack base such that the jack assembly is movable between a lowered position and a raised position, a primary support member coupled to the lift arm and configured to engage a load when the jack assembly is in the raised position, and a handle configured to enable a user to cause movement of the lift arm. The jack assembly further includes a secondary support assembly. The secondary support assembly includes a secondary base supported by the jack base, a telescoping support movably coupled to the secondary base, and a secondary support member movably coupled to the telescoping support and coupled to the primary support member such that movement of the primary support member toward the raised position causes a corresponding movement in the secondary support member.