Swinging Work Tool Mounting With Sealing Rings for Stable Guidance
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Solution Overview
Problem
Existing agricultural machine work tool protection mechanisms fail to provide accurate, firm, and stable 3D guidance, leading to constant vibration and changing working angles, and are often complex, expensive, and prone to wear.
Innovation Solution
A swinging mounting system with resilient sealing rings and a compression spring, where the work tool is attached to a tube with anti-slip sealing rings and oil fill, and a compression spring between the tool and the frame, allowing for stable guidance and absorption of swings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rubber elements are used for work tool attachment, then the tool can deflect under load, but precise and firm guidance of the tool cannot be achieved and the tool permanently vibrates
Solution Approach 1:
The mounting system is divided into separate functional components: a fixed shaft mounted in the frame, a removable tube attached to the tool, and resilient sealing rings positioned at the interface. This segmentation allows the shaft to provide stable guidance while the tube and sealing rings handle load-bearing and cushioning functions.
Solution Approach 2:
The resilient sealing rings act as intermediary elements between the fixed shaft and the movable tube. These rings provide both mechanical coupling and cushioning, allowing the tube to deflect under load while maintaining firm guidance through the shaft, thus resolving the contradiction between load-bearing capacity and guidance stability.
2Stability of the object's composition
If coiled spring with swivelling mounting is used, then the work tool is guided firmly, but the structure becomes more complicated and expensive and the pinned joint is prone to abrasive wear
Solution Approach 1:
The invention extracts and eliminates the complex swivelling mounting mechanism with pinned joints from the design. Instead, it uses a simple fixed shaft that provides guidance through its rigid mounting in the frame, removing the source of complexity and wear while maintaining guidance firmness.
Solution Approach 2:
Rather than using a movable swivelling joint to achieve guidance, the invention inverts the approach by using a fixed shaft that provides guidance through its stationary position, while allowing the tube and tool to move relative to it. This eliminates the wear-prone pinned joint while maintaining firm guidance.
3Strength
If hydraulic cylinder with pressure accumulator is used, then the work tool can handle heavy-duty conditions, but the structure becomes more complicated and the pinned joint is prone to considerable abrasive wear
Solution Approach 1:
The invention replaces the expensive and complex hydraulic cylinder with simple, inexpensive resilient sealing rings that can be easily replaced. The sealing rings provide sufficient cushioning for heavy-duty conditions without the complexity of hydraulic systems, and their simple design allows for easy maintenance.
Solution Approach 2:
The invention changes the physical parameters of the mounting system by using resilient sealing rings with appropriate material properties (elasticity, damping characteristics) to handle heavy-duty loads. This eliminates the need for complex hydraulic pressure accumulation while maintaining the ability to absorb shock and handle heavy conditions.
4Strength
If silentblocks with abrasion-resistant pads are used, then the mounting can handle load, but the seating in the silentblocks is unstable and the work tool constantly moves
Solution Approach 1:
The mounting system is segmented into a fixed shaft for stable positioning and a movable tube for load-bearing. The shaft remains stationary in the frame, providing stable guidance, while the tube moves with the tool, handling all the load-bearing functions. This segmentation eliminates the instability inherent in trying to combine positioning and load-bearing in a single component.
Solution Approach 2:
The resilient sealing rings serve as intermediaries that connect the fixed shaft to the movable tube. They provide stable seating through their elastic properties, allowing the shaft to remain firmly positioned while the tube and tool move as a unit. This eliminates the constant movement and instability experienced with silentblock designs.
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 provides a simple, cost-effective, and maintenance-free system that ensures firm and accurate guidance of the work tool, extending the service life of components and allowing for stable operation with minimal wear.
Implementation Method 1
at least two resilient sealing rings in an anti-slip manner are arranged at the edges of the cavity... The inner surface of the resilient rings clamps the shaft tightly and the outer surface of the rings pushes against the tube in an expanding way
Implementation Method 2
There is oil fill arranged between the resilient rings inside the cavity of the tube
Implementation Method 3
a compression spring between the tool and the frame, allowing for stable guidance and absorption of swings
Data Source
AI summary
A device to protect a work tool of an agricultural machine, especially a device to protect a work tool of a soil cultivator against overload when hitting an obstacle. The device includes a swinging mounting arranged in connection between a load-bearing frame of the machine and a work tool. The work tool is attached to a tube in a cavity of which there is a shaft fixed in a load-bearing frame and, at the edges of the cavity, at least two resilient sealing rings are arranged in an anti-slip manner, and between the rings, inside the cavity of the tube, oil fill is arranged.