Counterweight Mounting Device Multilink Transfer Mechanism
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Solution Overview
Problem
Existing counterweight mounting devices for working machines, such as excavators, are prone to deformation or damage due to the continuous weight of the counterweight, and require additional costly components like magnetic forces or hydraulic cylinders for efficient transfer, which increases operational complexity and cost.
Innovation Solution
A counterweight mounting device utilizing a multilink structure and a single hydraulic cylinder with a chain connection, allowing for accurate and safe transfer of the counterweight by rotating the link structure in conjunction with the hydraulic cylinder's operation, thereby minimizing deformation and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the counterweight is hanged on the counterweight mounting device for mounting, then the counterweight can be mounted on the frame, but the counterweight mounting device may be deformed or destroyed due to continuous weight
Solution Approach 1:
The patent introduces a transfer device comprising a transfer link and connection member as an intermediary between the counterweight mounting device and the counterweight. This intermediary transfers the counterweight from the ground to the frame without requiring the mounting device to directly support the counterweight's full weight during operation, thereby preventing deformation while maintaining mounting capability
Solution Approach 2:
The patent divides the counterweight transfer process into two separate functional components: the counterweight mounting device (for securing to the frame) and the transfer device (for moving the counterweight). This segmentation allows each component to be optimized for its specific function, with the transfer device bearing the transfer load rather than the mounting device
2Ease of manufacture
If a fixed link is used to transfer the counterweight, then the transfer structure is simple, but the counterweight may not be in contact with the upper surface of the frame requiring additional costly components
Solution Approach 1:
The patent employs a dynamic transfer mechanism where the transfer link can rotate and adjust its position during the transfer process. This dynamic capability allows the connection member to guide the counterweight onto the frame's upper surface, ensuring proper contact and placement without requiring additional magnetic or hydraulic components
3Reliability
If additional hydraulic cylinders or magnetic force generation devices are added to vertically transfer the counterweight, then the counterweight can be accurately transferred, but additional cost and operational complexity increase
Solution Approach 1:
The patent designs the transfer device to utilize the existing counterweight mounting device and the counterweight's own weight to achieve the transfer function. The transfer link rotates under the influence of gravity and the mounting device's structural support, eliminating the need for additional active propulsion systems while maintaining transfer accuracy
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
The solution enables accurate, safe, and cost-effective transfer of the counterweight, preventing deformation of the link structure and reducing the manufacturing cost, while maintaining a minimal volume and not increasing the counterweight's rotation radius, thus enhancing operational efficiency and stability.
Implementation Method 1
a hydraulic cylinder of which a lower end is coupled to the frame so that the hydraulic cylinder is rotatable about a cylinder rotation shaft and an upper end is coupled to the second hinge shaft and rotates the first link
Data Source
AI summary
A counterweight mounting device, which is installed on a frame supporting a counterweight, includes a first link of which a lower end is coupled to the frame so that the first link is rotatable about a first hinge shaft, a second link including a slot guide into which a second hinge shaft coupled to an upper end of the first link is inserted and in which the second hinge shaft slides, a hydraulic cylinder of which a lower end is coupled to the frame so that the hydraulic cylinder is rotatable about a cylinder rotation shaft and an upper end is coupled to the second hinge shaft and rotates the first link, and a connection member installed on an upper end of the second link and connected to the counterweight.