Vehicle Crane Support Arrangement for Stability
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Solution Overview
Problem
Vehicle cranes face stability issues due to insufficient standing surface and flexibility of the running gear unit, particularly when picking up loads, leading to uncontrollable movements and tilting moments, which are not adequately addressed by existing designs.
Innovation Solution
The design reduces the number of side supports and incorporates a unique arrangement of base and side supports, with the base supports being compact and lighter, allowing for increased stability while minimizing weight and cost, and utilizing telescopic or pivotable mechanisms to enhance tilting protection and reduce installation space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If multiple side supports and base supports are arranged to increase stability, then the stability of the vehicle crane is improved, but the weight and complexity of the structure increases
Solution Approach 1:
The patent extracts and removes unnecessary support structures (specifically, only two side supports are used instead of more), retaining only the essential supports needed for stability. This selective retention reduces weight while maintaining adequate stability through optimized support arrangement.
Solution Approach 2:
The patent employs asymmetric arrangement of supports where base supports are positioned oppositely to side supports in relation to the vertical axis. This asymmetric configuration optimizes the stability triangle formation, improving stability efficiency while reducing the total number of supports needed.
2Stability of the object's composition
If multiple side supports with support carriers are used to enlarge the tilting area, then the stability is improved, but the installation space requirements and complexity increase
Solution Approach 1:
The patent removes excess support carriers, retaining only two side supports with support carriers that are remotely positioned from the rotary connection support. This extraction reduces structural complexity while maintaining adequate tilting protection through the optimized arrangement of remaining supports.
Solution Approach 2:
The patent positions support carriers remotely from the rotary connection support in the longitudinal direction, utilizing space in another dimension. This remote arrangement creates an optimized stability triangle that provides adequate tilting protection without requiring additional support carriers in the lateral direction.
3Weight of moving object
If the number of support carriers is reduced to two, then the weight and cost are reduced, but the stability may be compromised
Solution Approach 1:
The patent uses asymmetric positioning where base supports are arranged oppositely to the side supports with respect to the vertical axis. This asymmetric configuration creates an optimized stability triangle that compensates for having only two side supports, maintaining stability through geometric optimization rather than numerical redundancy.
Solution Approach 2:
The patent utilizes the longitudinal dimension by positioning support carriers remotely from the rotary connection support. This creates a stable configuration where the stability triangle is formed through longitudinal spacing rather than lateral multiplication of supports, achieving stability with fewer components.
Data Source
AI summary
A vehicle crane having a lower carriage with a longitudinal axis and a superstructure that is rotatable about a vertical axis includes at least one base support and at least two side supports arranged on the lower carriage, where the base support and the side supports can be supported with respect to the ground. The two side supports are each arranged on the lower carriage via a support carrier and oppositely in relation to the longitudinal axis of the lower carriage, and precisely two side supports are arranged on the lower carriage. Each base support is arranged oppositely with respect to the two side supports in relation to the vertical axis and as seen in the direction of the longitudinal axis, and a rotary connection support for the superstructure is arranged on the lower carriage and the two support carriers are arranged remotely from the rotary connection support.