Crane Boom Attach Mechanism Reducing Upper Slewing Body Mass
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Solution Overview
Problem
Existing boom attach/detach systems for cranes increase the size, mass, and cost of the upper slewing body due to the need for a separate boom receiving base, which is undesirable for transportation and operation.
Innovation Solution
A boom attach/detach device that uses a drive cylinder to extend and contract the boom, allowing it to be attached and detached without a separate power device, with the boom supporting portion positioned ahead of the upper slewing body to reduce the size and mass of the upper slewing body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a boom receiving base is arranged between the boom supporting bracket and the boom to enable attachment/detachment, then the boom can be attached/detached without other lifting means, but the size of the upper slewing body is increased
Solution Approach 1:
The invention extracts the boom receiving base from the upper slewing body structure and places it on the transport carriage. This separation allows the upper slewing body to maintain a compact size while still enabling boom attachment/detachment operations through the external receiving base on the carriage.
Solution Approach 2:
The transport carriage serves as an intermediary platform that carries the boom receiving base. This mediator allows the boom attachment/detachment function to be achieved without permanently increasing the size of the upper slewing body, as the receiving base is temporarily positioned on the carriage during transport and assembly operations.
2Ease of operation
If a boom receiving base is arranged between the boom supporting bracket and the boom to enable attachment/detachment, then the boom can be attached/detached without other lifting means, but the mass of the upper slewing body is increased by the mass of the boom receiving base
Solution Approach 1:
The boom receiving base is extracted from the upper slewing body and relocated to the transport carriage. This transfer of the receiving base reduces the mass of the upper slewing body while maintaining the attachment/detachment capability through the external receiving base on the carriage.
Solution Approach 2:
The transport carriage acts as an intermediary that bears the mass of the boom receiving base during transport and assembly operations. This allows the upper slewing body to remain lightweight while still achieving boom attachment/detachment functionality through the receiving base positioned on the carriage.
3Ease of operation
If a boom receiving base is arranged between the boom supporting bracket and the boom to enable attachment/detachment, then the boom can be attached/detached without other lifting means, but the cost of the upper slewing body is increased
Solution Approach 1:
The boom receiving base is extracted from the upper slewing body and positioned on the transport carriage. This separation reduces the manufacturing cost of the upper slewing body by eliminating the need to integrate the receiving base into its structure, while still enabling attachment/detachment operations.
Solution Approach 2:
The transport carriage is designed to serve multiple functions: it transports the upper slewing body and simultaneously supports the boom receiving base for attachment/detachment operations. This multi-functionality eliminates the need for a dedicated receiving base on the upper slewing body, reducing manufacturing costs.
4Adaptability or versatility
If the upper slewing body is transported, then it can be moved to different locations, but increases in size and mass of the upper slewing body are not desirable due to transportation limitations
Solution Approach 1:
The boom receiving base is extracted from the upper slewing body and placed on the transport carriage. This separation allows the upper slewing body to maintain a compact, transportable size while still enabling boom attachment/detachment operations through the external receiving base on the carriage.
Solution Approach 2:
The system transitions from a static configuration where the receiving base is permanently integrated into the upper slewing body to a dynamic configuration where the receiving base is temporarily positioned on the transport carriage. This dynamic arrangement optimizes the upper slewing body size for transport while maintaining full functionality when 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
Enables easy attachment and detachment of the boom without additional power devices, reducing the size, mass, and cost of the upper slewing body, thereby improving transportation efficiency and operational costs.
Implementation Method 1
a drive cylinder (31), and a boom supporting portion (50). The drive cylinder (31) is provided in the upper slewing body (13) or in the boom (20) to drive the boom (20)
Implementation Method 2
the boom supporting portion (50) supports the boom (20). At least a part of the boom supporting portion (50) is arranged more to a boom front end side (X2) than the upper slewing body (13)
Data Source
AI summary
A boom attach/detach device includes a boom, an extensible cylinder, and a boom supporting device. At least a part of the boom supporting device is arranged more to a boom front end side than an upper slewing body. When the extensible cylinder conducts extension and contraction operation in a state where coupling between the upper slewing body and the boom by a boom foot pin is cut off, the boom supporting device supports the boom to enable a rear end portion of the boom to move in a boom axis direction. The boom can be attached or detached with ease without a need to use a separate power device from a crane to suppress increases in size, in mass, and in cost of an upper slewing body.