Under Hoist Support Stand Spin Handle Assembly
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Solution Overview
Problem
Existing under hoist support stands require continuous and time-consuming manual spinning to extend and retract the support screw, making it inefficient for rapid adjustment of the saddle to the required work height.
Innovation Solution
A spin handle assembly with pivoting release tabs that selectively engage and disengage the support screw, allowing it to be rapidly raised and lowered along the longitudinal axis of the support stand, and a mechanism for disengaging the spin handle from threaded engagement, enabling manual movement of the screw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous manual spinning of the spin handle is used to extend and retract the support screw, then the screw can be firmly engaged and disengaged, but the process becomes time-consuming and reduces productivity
Solution Approach 1:
The spin handle assembly is segmented into two functional modes: a threaded engagement mode for secure attachment and a disengaged mode for rapid movement. The release tabs divide the single continuous spinning operation into distinct phases, allowing the user to selectively engage or disengage the threaded connection between the spin handle and support screw, thereby separating the functions of secure engagement and rapid positioning.
Solution Approach 2:
The spin handle assembly transitions from a static threaded connection to a dynamic system where the release tabs can pivot between engaged and disengaged positions. This dynamic capability allows the operator to quickly switch between firm engagement (when tabs are rotated into threaded contact) and free movement (when tabs are released), enabling rapid adjustment while maintaining secure engagement when needed.
2Ease of operation
If the spin handle is continuously turned to extend the support screw to working height, then the saddle can be positioned, but the operation requires excessive time and effort
Solution Approach 1:
The release tabs are pre-positioned in a neutral state where they can be quickly actuated to disengage from the threaded connection. This preliminary preparation allows the operator to rapidly transition from the engaged state to the disengaged state without requiring continuous spinning, thereby reducing the time and effort needed to reposition the saddle along the support stand.
Solution Approach 2:
The threading function is extracted from the continuous spinning operation. By removing the threaded engagement requirement during positioning operations, the operator can manually raise and lower the support screw without the time-consuming continuous spinning motion, while the threading function remains available for secure engagement when the release tabs are actuated.
3Strength
If the spin handle assembly maintains constant threaded engagement with the support screw, then secure support is provided, but rapid repositioning becomes difficult
Solution Approach 1:
The release tabs provide localized engagement points on the spin handle assembly that can be selectively activated. When the tabs are in the engaged position, they provide strong threaded contact with the support screw for secure support. When released, they allow free movement for rapid repositioning. This local quality control enables the system to switch between strong support and rapid adjustment based on operational needs.
Solution Approach 2:
The spin handle assembly serves multiple functions through the release tab mechanism: it provides both secure threaded engagement for support and rapid disengagement for repositioning. The same assembly structure accommodates both the strength requirement (through threaded contact) and the adaptability requirement (through releasable tabs), making the system universally capable of both functions without requiring separate mechanisms.
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
This solution significantly reduces the time required to position the saddle at the desired height, improving efficiency by allowing rapid positioning and fine adjustments, while maintaining secure engagement with the vehicle component.
Implementation Method 1
a spin handle assembly in threaded communication with the screw, the spin handle assembly being used to raise and lower the screw relative to the support tube
Implementation Method 2
a release mechanism for disengaging the spin handle assembly from threaded engagement with the screw
Data Source
AI summary
An under hoist support stand in which the spin handle to turn the threaded support screw can be selectively engaged and disengaged from the support screw and allows the screw to be positioned along a longitudinal axis of the support stand.