Movable Crane Base Weight for Moment Balance and Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cranes face challenges in maintaining stability during load lifting due to the need for additional counterweights and storage space, which is cumbersome and inefficient for varying load conditions.
Innovation Solution
A crane design that allows detachable counterweights to be positioned in either a front or rear location, using an auxiliary coupling member to adjust the balance without changing the weight, enhancing stability through a tilting mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If additional counterweights are added to increase rear moment for stability, then lifting capacity and stability are improved, but device complexity and storage space requirements increase
Solution Approach 1:
The base weight is designed to be movable along the rear end portion of the slewing frame, allowing dynamic repositioning to adjust the rear moment according to different lifting conditions. This eliminates the need for multiple fixed counterweight configurations and reduces device complexity while maintaining crane stability.
Solution Approach 2:
The single base weight serves multiple functions by being repositionable to different locations along the slewing frame. It can function as a counterweight of varying moment arms depending on its position, replacing the need for multiple dedicated counterweights for different lifting scenarios.
2Adaptability or versatility
If multiple counterweights are used to balance front moment, then lifting capacity is improved, but preparation time and operational complexity increase
Solution Approach 1:
The base weight can be dynamically repositioned along the slewing frame to adapt to different lifting conditions. This single movable component provides the same adaptability as multiple fixed counterweights but with much easier operation, as it requires only moving one component rather than assembling multiple pieces.
3Adaptability or versatility
If counterweight wagon is attached to rear of slewing frame, then lifting capacity is improved, but storage space requirements and transportation complexity increase
Solution Approach 1:
The counterweight function is segmented into a movable base weight that can be positioned at different locations along the slewing frame. This segmentation allows the same lifting capacity range to be achieved with a compact design that requires minimal storage space, as the base weight can be stored in a small space and repositioned as needed.
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
Maintains crane stability by adjusting counterweight placement to balance moments, preventing bending and enhancing stability in various lifting conditions without increasing weight or storage requirements.
Implementation Method 1
The counterweight has a function of keeping the balance of the crane against the weight of the boom and the weight of the hoisted load, and is a factor that determines the lifting capacity of the crane. The heavier the hoisted load becomes, the larger a front moment becomes that acts on the machine body to tilt the crane forward. Therefore, in order to stably lifting the hoisted load, it is necessary to maintain the stability of the crane by increasing a rear moment that acts on the machine body to tilt the crane rearward
Data Source
AI summary
A crane includes: a machine body; a tiltable body having a tiltable body proximal end supported on the machine body and being turnable in a tilting direction; a counterweight; a base weight having a placement surface that allows placement of the counterweight and being detachably attached to the machine body in either at least a front position or a rear position located behind the front position with the base weight projecting rearward further from the machine body than in the front position; and an auxiliary coupling member for coupling a portion of the base weight located in the rear position and the machine body to each other, the portion projecting rearward from the machine body.