Vibration-Decoupled Platform Structure for Construction Machine Lifting
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Solution Overview
Problem
Construction machines with vibration-decoupled control stands face challenges in lifting and moving due to excessive tensile loading on damping elements, which can lead to overloading and damage, especially when traditional transport shackles are attached directly to the machine frame.
Innovation Solution
A path limiting device is introduced to restrict the relative movement between the control stand and the machine frame during lifting, preventing excessive tensile loading on damping elements by allowing vibration damping within a limited range and bypassing the damping elements for power transmission during lifting, enabling the attachment of a towing device directly to the operator's cab structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the operator's platform is vibrationally decoupled from the machine frame using damping elements, then the vibration load on the driver is reduced, but the tensile strength of the damping elements is compromised during lifting operations
Solution Approach 1:
The lifting function is segmented from the vibration damping function. The positive-locking coupling device provides a separate lifting path that bypasses the damping elements, allowing vibration damping to remain effective during operation while preventing overload during lifting operations.
Solution Approach 2:
The positive-locking coupling device acts as an intermediary mechanism between the operator's platform and the machine frame during lifting operations. It engages to provide direct load-bearing connection, preventing excessive tensile forces from being transmitted to the damping elements while allowing normal vibration damping during operation.
2Ease of operation
If transport lugs are attached directly to the machine frame, then lifting forces can be applied, but accessibility and force application locations are limited to unfavorable positions
Solution Approach 1:
The operator's platform serves multiple functions: it provides a working platform for the driver during operation and becomes the lifting point during transport operations. The positive-locking coupling device enables the platform to fulfill both roles effectively, eliminating the need for separate transport lugs attached to the machine frame.
3Ease of operation
If the operator's platform is lifted directly via the damping elements, then lifting can be performed, but the damping elements become overloaded and may be destroyed
Solution Approach 1:
The coupling device transitions from a disengaged state during normal operation to an engaged state during lifting. This dynamic engagement ensures that the damping elements are only subjected to appropriate vibration damping loads during operation, while the positive-locking coupling bears the full lifting loads during transport, preventing overload and destruction.
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 allows for safe and effective lifting of construction machines by limiting the load on damping elements, preventing damage and enabling direct attachment of lifting devices to the operator's cab structure, thereby facilitating easier handling and reducing wear and tear.
Implementation Method 1
the at least one damping element (117) for reducing the vibration load on the operator's platform (106) when the construction machine (100) is in operation
Implementation Method 2
A path limiting device is introduced to restrict the relative movement between the control stand and the machine frame during lifting, preventing excessive tensile loading on damping elements
Data Source
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AI summary
The invention relates to a construction machine 100 with a machine frame 103 and a driver's platform 106, which is vibrationally decoupled from the machine frame by means of at least one damping element. A lifting device 115 is arranged on the driver's platform 106, which is designed for lifting the construction machine. The invention is characterized in that a limiting device is also provided, which limits the maximum load on the at least one damping element when the construction machine is lifted via the driver's platform and enables direct force transmission between the driver's platform and the machine frame, bypassing the damping element. The construction machine is preferably a tandem roller.