Three-Side Stacker Hydraulic Drive Integration
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Solution Overview
Problem
The existing three-side stacker's drive for the lifting scaffold or load receiving means requires a large number of components and high assembly and maintenance expenses, with a significant installation space, particularly due to the complexity of the rotational drive for the load supporting means.
Innovation Solution
The hydraulic rotational drive is integrated into the side arm with a lathe spindle, eliminating the need for hydraulic tubes by using a rotary transmission for hydraulic medium supply and incorporating a threaded sleeve and angle sensor for precise positioning, reducing the number of components and installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional rotational drive is used for the lifting scaffold or holder on the side arm, then the load supporting means can be positioned and rotated, but the number of individual components increases significantly and assembly and maintenance expenses become high
Solution Approach 1:
The patent combines the rotational drive and positioning mechanisms into a single integrated unit mounted on the side arm. The holder for load supporting means is directly integrated with the rotational drive mechanism, eliminating the need for separate positioning devices and reducing the total number of components while maintaining full positioning capability.
2Ease of operation
If a conventional rotational drive with hydraulic tubes is used, then the lifting cylinder can be actuated, but the hydraulic supply system becomes complex and prone to errors during turning movements
Solution Approach 1:
The patent extracts the hydraulic supply complexity by using a rotary transmission leadthrough that is directly integrated into the rotational drive unit. This eliminates the need for external hydraulic tubes that would need to flex and connect during rotation, removing the source of potential leaks and failures while maintaining full actuation capability.
3Ease of operation
If a conventional rotational drive is installed on the side arm, then the load supporting means can be rotated, but the installation space required becomes relatively large
Solution Approach 1:
The patent merges the rotational drive, holder, and positioning mechanisms into a compact integrated unit that mounts directly on the side arm. This consolidation eliminates the need for separate mounting structures and reduces the overall footprint, allowing rotation capability within a smaller installation space.
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 reduces the complexity and cost of assembly and maintenance, minimizes installation space, and allows for direct force transmission, enhancing the operational efficiency and visibility of the fork arms.
Implementation Method 1
The hydraulic rotational drive has a lathe spindle, which stays outside the casing with a portion on which a holder or a lifting scaffold for the load supporting means is splinedly attached
Implementation Method 2
incorporating a threaded sleeve and angle sensor for precise positioning
Data Source
AI summary
A three-side stacker with a side push frame at one end of the stacker, on which a side arm is horizontally traversable mounted, wherein the side arm has a first traversable portion mounted on the side push frame and a second portion, which is mounted pivotally around a vertical axis on the first portion and on which a load supporting means is mounted, which is actuable by a hydraulic lifting cylinder, and a pivoting equipment for the second portion, mounted on the first portion, wherein the casing of a hydraulic rotational drive with a rotatable spindle is fixed on the first portion, wherein a portion of the spindle is splinedly connected with a holder or a lifting scaffold for the load supporting means outside the casing.