Lift Jack Slow Descending Device Mechanism
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Solution Overview
Problem
Conventional lift jacks require manual support and effort to descend slowly after lifting an object, making the operation cumbersome.
Innovation Solution
A lift jack design incorporating a body, actuation rod, and a slow descending device with a driven mechanism and limitation mechanism, featuring springs, fixing protrusions, and a micro-adjustment handle to allow gradual and controlled descent by retracting the support sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual support is used to descend the lift jack slowly, then the descent speed can be controlled, but the operation becomes cumbersome and requires continuous user effort
Solution Approach 1:
The lift jack incorporates a slow descending device with a limitation mechanism that automatically controls the descent speed without requiring continuous manual support. The system uses springs and fixing protrusions to regulate the descent process, allowing the device to serve itself during the lowering operation.
Solution Approach 2:
A limitation mechanism acts as an intermediary between the lifting and descending operations. This mechanism includes a release lever, fixing protrusions, and springs that mediate the descent process, controlling the speed at which the support sheets retract without requiring direct manual intervention for speed control.
2Productivity
If the support sheets are retracted quickly, then the operation is faster, but manual support is required to control the descent
Solution Approach 1:
The slow descending device operates through periodic engagement and disengagement of fixing protrusions with the actuation rod. The limitation mechanism allows controlled periodic movement during descent, enabling faster operation while maintaining control through the mechanical periodic action of the springs and fixing elements.
3Reliability
If a limitation mechanism is added to fix the actuation rod, then the descent can be controlled, but the device complexity increases
Solution Approach 1:
The limitation mechanism is segmented into distinct functional components: fixing protrusions on the actuation rod, a release lever, and springs. This segmentation allows each element to perform a specific function in the descent control process, making the complex mechanism more manageable and maintainable while ensuring reliable controlled descent.
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 the lift jack to descend slowly and efficiently without manual support, allowing for controlled and repeated operation by adjusting the support sheets through a drive grip and micro-adjustment handle.
Implementation Method 1
The limitation mechanism has a first spring, multiple first fixing protrusions
Implementation Method 2
the second spring 31 surrounds around the actuation rod, the multiple second fixing protrusions accommodate the actuation rod and are pushed by the second spring
Implementation Method 3
the micro-adjustment handle has a third spring and a control lever pushed by the third spring and contacting with the multiple second fixing protrusions
Implementation Method 4
a fourth spring is defined between the pull lever and the release lever
Data Source
AI summary
A clamp contains: a body, an actuation rod, and a slow descending device. The body includes a first support sheet, and the actuation rod includes a second support sheet. The body further includes a drive grip, a driven mechanism, and a limitation mechanism. The limitation mechanism has a first spring, multiple first fixing protrusions, and a release lever. The slow descending device includes a second spring, multiple second fixing protrusions, a guide element, and a micro-adjustment handle. The micro-adjustment handle has a pull lever and the second spring 31 surrounds around the actuation ro. The multiple second fixing protrusions accommodate the actuation rod and are pushed by the second spring. The micro-adjustment handle has a third spring and a control lever pushed by the third spring and contacting with the multiple second fixing protrusions.