Vibration Damping in Industrial Truck Lifting Frames
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Industrial trucks experience significant vibrations in their lifting frames, particularly when the load-receiving section is moved vertically, leading to reduced productivity and unpleasant oscillations for the operator, as existing damping methods only address vibrations during load handling and not during travel.
Innovation Solution
The introduction of an additional degree of movement freedom between the load-receiving section and the lifting frame, perpendicular to the main direction of travel, allows for the dissipation of vibrational energy through damping means, such as spring/damper combinations or active control systems, effectively decoupling the load-receiving section and lifting frame to prevent transverse vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the load-receiving section is moved vertically on the lifting frame, then the productivity of the industrial truck is improved, but vibrations occur in the lifting frame which reduce productivity further and cause unpleasant oscillations for the operator
Solution Approach 1:
The invention segments the load-receiving section from the lifting frame by introducing an additional degree of freedom, allowing them to move independently. This segmentation enables the load-receiving section to be decoupled from the lifting frame's vibrations, reducing harmful vibrations while maintaining vertical movement capability for improved productivity.
Solution Approach 2:
The invention adds a new dimension of movement freedom perpendicular to the main vertical direction of travel. This additional degree of freedom creates a transverse direction where vibrations can be damped, allowing the load-receiving section to move vertically for productivity while preventing harmful vibrations through the new dimensional freedom.
2Object-affected harmful factors
If existing damping methods are used to damp vibrations during load handling, then vibration amplitudes are reduced, but vibrations during travel are not addressed and productivity is still reduced
Solution Approach 1:
The invention implements preliminary action by providing damping means that are always active and ready to damp vibrations during travel, before load handling operations begin. This ensures vibrations are controlled throughout the entire operational cycle, not just during load handling, thereby maintaining productivity.
Solution Approach 2:
The additional degree of freedom with damping means serves multiple functions: it damps vibrations during travel, allows independent movement of the load-receiving section during load handling, and provides continuous vibration control throughout the operational cycle, making the system universally effective across all operations.
3Device complexity
If the load-receiving section is rigidly connected to the lifting frame, then structural simplicity is maintained, but vibrations are not damped and collisions with shelves may occur
Solution Approach 1:
The invention transitions from a rigid static connection to a dynamic connection with an additional degree of freedom that can move and damp vibrations. This dynamic connection allows the load-receiving section to respond to vibrations by moving in the transverse direction, effectively damping them while maintaining structural integrity and preventing collisions.
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 efficiently damps or prevents vibrations across the additional degree of freedom, reducing overall vibration amplitudes and preventing collisions with shelves, thereby enhancing operational productivity and comfort by dissipating vibrational energy more effectively than previous methods.
Implementation Method 1
spring/damper combinations
Implementation Method 2
spring/damper combinations
Implementation Method 3
damping means
Implementation Method 4
damping means
Data Source
AI summary
An industrial truck is shown with a lifting frame, on which a load-receiving section is arranged so as to be movable vertically. The load-receiving section has at least one degree of movement freedom with respect to the lifting frame, which lies in a plane perpendicular to the main direction of travel of the industrial truck and has at least one horizontal component. In addition, a vibration control system is provided for damping or preventing vibrations in the relative position of load-receiving section and lifting frame.