Height-Adjustable Crane Rails for Rail Vehicle Gantry Cranes
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Solution Overview
Problem
Existing rail vehicles with gantry cranes face structural limitations due to low overall height, resulting in reduced lifting capacity and working comfort, as the crane rails must maintain a low clearance gauge, limiting the height of materials that can be lifted and compromising worker safety.
Innovation Solution
The implementation of height-adjustable crane rail sections driven by a hydraulic system, allowing the gantry crane to be raised or lowered, creating a safer working space and enabling the use of taller cranes without breaking the profile of the light protection room, with locking devices to prevent relative movement and buffer protection for wear prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the gantry crane is made taller to improve lifting capacity and working comfort, then the lifting height and operator comfort are improved, but the overall height of the rail vehicle increases and may breach the profile of the light-shielded area
Solution Approach 1:
The crane rail sections are made height-adjustable through a hydraulic drive system, allowing the gantry crane height to be dynamically changed. During transfer operations, the crane rail sections can be lowered to maintain the light-shielded area profile, while during lifting operations, they can be raised to increase lifting capacity and working comfort.
Solution Approach 2:
The height parameter of the crane rail sections is made variable rather than fixed. The hydraulic drive system enables continuous adjustment of the crane rail height, allowing optimization of the gantry crane height for different operational requirements - taller for lifting operations, lower for transfer operations to avoid breaching the light-shielded area profile.
2Length of moving object
If the crane rail sections are made height-adjustable to allow taller gantry cranes, then lifting capacity is improved, but the device complexity increases due to additional drive and locking mechanisms
Solution Approach 1:
A hydraulic drive system is used to actuate the height-adjustable crane rail sections. The hydraulic system provides compact, powerful, and precise control for raising and lowering the crane rails, with locking devices that can securely hold the crane rail sections in adjusted positions. This hydraulic mechanism enables height adjustment functionality while maintaining a relatively compact and manageable system complexity.
3Ease of operation
If the machine frame is cranked upwards to create working space underneath, then worker safety is improved, but the structural complexity of the machine frame increases
Solution Approach 1:
The machine frame is designed with a crankable section that can be rotated upwards to create a working space underneath. This dynamic structural feature allows the frame to transform from a flat configuration to a raised configuration, providing a safe working area for operators while maintaining structural integrity through the crank mechanism.
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 enhances lifting capacity, improves working comfort, and ensures safe operation by allowing a taller gantry crane with precise positioning and reduced wear on crane carriages and rail ends, while maintaining a compact design and low-friction movement.
Implementation Method 1
a hydraulic drive (18) is provided for lowering or raising the crane rail sections (12)
Implementation Method 2
each crane carriage (14) can be locked onto the height-adjustable crane rail section (12) via a locking device (13)
Implementation Method 3
each respective crane trolley (4) is limited by buffers (24) in a lowered position
Data Source
Figure 1~4
Figure 2~3
AI summary
The invention relates to a rail vehicle (1), having a machine frame (2), which is supported on rail bogies (4) and on which crane rails (8) for a movable gantry crane (11) are arranged on both sides in the rail vehicle longitudinal direction (3). A crane rail section (12) of each crane rail (8) is arranged for height adjustment by means of a drive (18) in order to lower or raise the gantry crane (11). Thus, in comparison with the prior art, a higher gantry crane (11) can be used without violating a specified clearance profile during transfer trips.