Lifting Tube Adjustment Mechanism for Stable Gap Compensation
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Solution Overview
Problem
Conventional lifting devices experience unstable movement of the inner tube relative to the outer tube due to changes in the gap between them, caused by production errors, leading to the need for frequent replacement of balls in the support module, which compromises the stability of the support mechanism.
Innovation Solution
An adjustment mechanism is introduced, featuring angularly spaced abutment modules and an adjustment module with a drive member, pressing unit, and adjustment seat, allowing for the adjustment of the abutment force between the inner and outer tubes to maintain stable movement by altering the degree of contact between the inner tube and the abutment units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the gap between outer and inner tubes changes due to production error, then ball size must be changed to accommodate the gap, but this requires frequent replacement of balls and compromises support stability
Solution Approach 1:
The support module transitions from a static ball configuration to a dynamic adjustable structure where the pressing unit can be moved along the outer tube to change the abutment force. This dynamic adjustment compensates for manufacturing variations in the gap between tubes, maintaining stable support without requiring ball replacement
Solution Approach 2:
The invention changes the parameter of abutment force by adjusting the position of the pressing unit along the outer tube. This parameter adjustment allows the system to adapt to different gap sizes caused by production errors, ensuring consistent support stability across varying manufacturing tolerances
2Length of moving object
If the gap between outer and inner tubes is excessively large, then larger diameter balls must be used, but this increases device complexity and maintenance requirements
Solution Approach 1:
The adjustable pressing unit serves multiple functions: it provides support through abutment, allows adjustment for different gap sizes, and eliminates the need for multiple ball sizes. This multi-functional design replaces the complex system of storing and replacing different sized balls with a single adjustable mechanism
3Reliability
If abutment force is increased to improve support stability, then contact between inner tube and abutment units increases, but this may increase friction and affect smooth movement
Solution Approach 1:
The abutment force is made dynamically adjustable through the pressing unit's movable position. The system can be adjusted to provide the minimum necessary abutment force for stable support, avoiding excessive friction that would impede smooth movement of the inner tube
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 adjustment mechanism ensures stable and adjustable support for the inner tube, allowing for consistent movement relative to the outer tube, reducing the need for frequent ball replacements and enhancing the overall stability and clamping force of the lifting device.
Implementation Method 1
The drive member is operable to drive movement of the adjustment seat relative to the outer tube so as to push the pressing unit against the outer wall surface of the inner tube to thereby abut the outer wall surface of the inner tube against the abutment units of the abutment modules
Data Source
AI summary
An adjustment mechanism is configured to be disposed between inner and outer tubes of a lifting device, and includes two angularly space-apart abutment modules configured to be disposed on an inner wall surface of the outer tube and each of which has an abutment unit configured to abut against an outer wall surface of the inner tube, and an adjustment module including an adjustment seat, and a pressing unit and a drive member both disposed on the adjustment seat. The drive member is operable to drive movement of the adjustment seat relative to the outer tube so as to push the pressing unit against the outer wall surface of the inner tube to thereby abut the outer wall surface of the inner tube against the abutment units of the abutment modules.