Tower Lift Belt Alignment Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Tower lifts used in semiconductor and display manufacturing experience issues with timing belts disengaging from pulleys and balance belts disengaging from auto tensioners, particularly at increased heights or speeds, leading to instability and potential misalignment during vertical object transport.
Innovation Solution
The tower lift incorporates a timing pulley with gear portions and a driving unit, along with upper and lower alignment units using rollers and elastic members to maintain belt alignment, and an auto tensioner with movable pulleys to prevent disengagement, ensuring consistent tension and alignment of timing and balance belts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the height of the tower lift is increased or the vertical movement speed is increased, then the transport capacity and efficiency are improved, but the timing belt may be disengaged from the timing pulley and the balance belt may be disengaged from the pulleys
Solution Approach 1:
The patent introduces alignment units as intermediary components between the timing belt and timing pulley, and between the balance belt and pulleys. These alignment units include alignment rollers and guide structures that actively guide the belts onto the pulleys, preventing disengagement during high-speed operation. The intermediary alignment structures mediate the interaction between belts and pulleys, ensuring reliable engagement even at increased vertical movement speeds.
2Length of moving object
If the height of the tower lift is increased or the vertical movement speed is increased, then the transport capacity and efficiency are improved, but the timing belt may be disengaged from the timing pulley and the balance belt may be disengaged from the pulleys
Solution Approach 1:
The alignment units serve as intermediary components that become increasingly important as tower lift height increases. The alignment rollers and guide structures positioned at strategic locations along the vertical path continuously guide the belts, preventing disengagement over longer travel distances. This intermediary guidance system maintains reliable belt-pulley engagement throughout the extended height of the tower lift.
3Reliability
If alignment rollers and elastic members are added to maintain belt alignment, then the belt disengagement problem is prevented, but the device complexity increases
Solution Approach 1:
The patent employs dynamic alignment mechanisms where alignment rollers are mounted on movable supports with elastic members (springs) that allow the rollers to automatically adjust their positions. This dynamic configuration enables the alignment system to adapt to belt tension variations and positional deviations without requiring complex fixed structures. The elastic members provide automatic compensation, reducing overall structural complexity while maintaining high reliability.
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 configuration effectively prevents timing belts from disengaging from the timing pulley and balance belts from disengaging from pulleys, maintaining stable operation and alignment even at higher speeds and increased heights, enhancing the reliability of vertical object transport in semiconductor and display manufacturing processes.
Implementation Method 1
upper movable blocks to which the second upper alignment rollers are mounted respectively and configured to be movable in a direction parallel with a central axis of the timing pulley
Data Source
AI summary
A tower lift includes a main frame extending in a vertical direction, a carriage module configured to be movable in the vertical direction along the main frame, a weight module disposed behind the carriage module and configured to be movable in the vertical direction along the main frame, a driving module disposed on the main frame and configured to move the carriage module and the weight module in the vertical direction using at least one timing belt, an auto tensioner disposed on a lower portion of the main frame and connected with the carriage module and the weight module by a balance belt, and an upper alignment unit for aligning a horizontal position of the at least one timing belt.