Modular Crane Undercarriage with Central Pot for Stability and Mobility
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Solution Overview
Problem
Existing crane types have limitations in terms of mobility, stability, and transport efficiency, as mobile cranes face uneven ground pressure, crawler cranes have inhomogeneous ground pressure distribution, and pedestal cranes require frequent setup and teardown.
Innovation Solution
A crane design featuring an undercarriage with a central pot and articulated supports, allowing for connection to various chassis for stability and mobility, including wheeled and crawler options, with detachable longitudinal members and a controlled three-point bearing for off-road capability, enabling flexible deployment and transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mobile crane uses a modular structure with detachable modules, then the ease of transport and setup is improved, but the stability and ground pressure distribution deteriorate
Solution Approach 1:
The crane is divided into modular components including a superstructure, undercarriage, and chassis that can be detached and reconfigured. The longitudinal beams can be connected to different chassis types (wheeled or crawler) depending on the operational requirements, allowing the crane to be transported efficiently and set up stably at the construction site.
Solution Approach 2:
The crane system allows dynamic reconfiguration by connecting the undercarriage with longitudinal beams to different chassis types based on operational needs. The chassis can be detached and replaced - using wheeled chassis for transport and crawler chassis for stable operation on construction sites, thereby adapting the system's mobility and stability characteristics dynamically.
2Stability of the object's composition
If a pedestal crane is used as a stationary base crane, then the stability is improved, but the productivity and ease of relocation deteriorate
Solution Approach 1:
The crane transitions from a stationary pedestal design to a dynamic system where the undercarriage can be connected to different chassis types. During operation, the crane uses a stable crawler or wheeled chassis as its base, replacing the traditional stationary pedestal. This allows the crane to maintain stability during operation while being easily relocatable by detaching the superstructure from the chassis and transporting it to new locations.
3Ease of operation
If a crawler chassis is used for moving the crane, then the ease of movement on construction site is improved, but the ground pressure distribution and axle load issues worsen
Solution Approach 1:
The system dynamically switches between wheeled and crawler chassis based on operational requirements. For transport on roads, a wheeled chassis is used to minimize ground pressure and comply with axle load regulations. For movement on construction sites, a crawler chassis is attached to provide enhanced mobility on uneven terrain. This dynamic reconfiguration allows the crane to optimize its movement characteristics for each specific task while avoiding the continuous disadvantages of using a single chassis type.
Data Source
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AI summary
The invention relates to a crane (100) comprising a chassis (5) with a slewing ring (2) and a superstructure (1) rotatably mounted on the chassis via the slewing ring. The superstructure has at least one boom system (3) arranged on the superstructure that can be tilted about a pivot axis, or a self-climbing tower crane (200) rotatably mounted on the superstructure via the slewing ring. According to the invention, the chassis (5) has a central component called a cup (51), which firstly accommodates the slewing ring (2). Furthermore, the pivotable outriggers (52) can also be articulated to it. Longitudinal beams (54) are provided on opposite sides, to which at least one trolley (60) with at least one degree of freedom can be connected.