Self-Positioning Handling Equipment for Aluminum Profiles
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Solution Overview
Problem
Current lifting devices for large truss-type hollow extruded aluminum alloy profiles in high-speed rail transit vehicles suffer from irregular swaying, manual assistance requirements, and inability to restrict x-axis movement, leading to longitudinal accuracy errors and safety risks during handling and placement.
Innovation Solution
The equipment for self-positioning handling of aluminum profiles features a handling and lifting mechanism, a steel beam, 2-DOF spatial mechanisms, and mechanical clamping jaws. The 2-DOF spatial mechanisms restrict z-axis rotation and allow for x-axis rotational adjustments, while the mechanical clamping jaws provide secure gripping and clamping of the profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional lifting devices with three degrees of freedom are used, then flexible lifting is achieved, but longitudinal placement accuracy deteriorates due to x-axis movement and z-axis rotation
Solution Approach 1:
The patent transforms the rigid three-degree-of-freedom lifting mechanism into a dynamic two-degree-of-freedom spatial mechanism that can adapt its configuration. The mechanism allows rotation around the x-axis while constraining z-axis rotation, enabling the system to dynamically adjust to profile positions while maintaining longitudinal accuracy through controlled degrees of freedom
Solution Approach 2:
The patent changes the fundamental parameters of the lifting device by reducing the degrees of freedom from three to two, specifically eliminating z-axis rotation while preserving x-axis rotation capability. This parameter change fundamentally alters the error propagation characteristics, preventing the magnification of longitudinal errors that occurs with the traditional three-degree-of-freedom system
2Reliability
If manual assistance is used for profile placement, then safety is improved, but productivity deteriorates due to labor-intensive operations
Solution Approach 1:
The patent implements self-service by equipping the handling device with automatic positioning capabilities through the 2-DOF spatial mechanism. The system automatically adjusts the clamping angle and maintains longitudinal accuracy without requiring manual intervention for profile placement, thereby improving both safety and productivity simultaneously
Solution Approach 2:
The patent replaces manual mechanical operations with an automated spatial mechanism that uses controlled rotational degrees of freedom to achieve precise profile placement. This substitution eliminates the need for manual assistance while maintaining safety through engineered constraints rather than human oversight
3Object-affected harmful factors
If nylon blocks are installed on profiles, then damage prevention is improved, but device complexity increases due to additional components
Solution Approach 1:
The patent replaces rigid nylon blocks with flexible clamping jaws that conform to the profile shape. The flexible clamping mechanism provides protective contact throughout the profile surface rather than at discrete block locations, reducing the risk of damage while simplifying the overall device structure by eliminating separate protective components
Data Source
AI summary
Equipment for self-positioning handling of aluminum profiles for rail vehicle, including a handling and lifting mechanism, a steel beam fixed on and being driven to lift by the mechanism, 2-DOF spatial mechanisms fixed on the steel beam and mechanical clamping jaws fixed on a clamping jaw connecting seat; the 2-DOF spatial mechanisms includes a cylinder supporting seat, four connecting members on an outer ring of the cylinder supporting seat hinged respectively to four first connecting rods; wherein, two of the first rods are hinged to first ends of two ball joint connecting rods of which second ends are hinged to the clamping jaw connecting seat; the other two first rods are hinged to first ends of two second connecting rods of which second ends are hinged to the clamping jaw connecting seat; a piston rod of a cylinder center of the cylinder supporting seat driving the clamping jaw connecting seat.