Front Rotary Working Machine Support Device Load Distribution
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Solution Overview
Problem
Walk-behind working machines with a front wheel positioned in front of a rotary working portion face the challenge of support arm deformation under heavy loads, necessitating a strengthening of the support structure without compromising lightness, especially for large-size farm machines.
Innovation Solution
A support device connected to the transmission case with a guard member that distributes the load from the front wheel to the transmission case and guard member, preventing elastic deformation and facilitating dirt discharge and maintenance, while maintaining the ability to adjust the front wheel's height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the support structure of the wheel support arm is strengthened by increasing material or structural complexity, then the strength increases, but the weight increases and lightness is lost
Solution Approach 1:
The support device is divided into multiple components: wheel support arm, side plate members, guard member, and fastening members. This segmentation allows each component to be optimized independently for strength-to-weight ratio, using appropriate materials and structures only where needed rather than uniformly strengthening the entire assembly.
Solution Approach 2:
The guard member serves dual functions: it protects the rotary working portions from debris while simultaneously acting as a load-bearing component that reinforces the support structure. By merging the protective function with the structural support function, the design achieves strengthening without adding separate reinforcing components that would increase weight.
2Strength
If the support device is made more complex to increase strength, then the strength increases, but the device complexity increases and maintenance becomes harder
Solution Approach 1:
By segmenting the support device into modular components (wheel support arm, side plate members, guard member), the design achieves structural strength through clear functional divisions rather than complex integrated structures. Each segment can be independently manufactured, inspected, and maintained, reducing overall system complexity.
Solution Approach 2:
The side plate members include openings that serve dual purposes: they reduce material usage and weight while simultaneously enabling self-cleaning by allowing debris to fall through. This eliminates the need for additional cleaning mechanisms or complex maintenance procedures.
3Strength
If the side plate member is made solid without openings, then the structural integrity improves, but dirt accumulation occurs and maintenance becomes difficult
Solution Approach 1:
The side plate members feature openings only at specific locations where debris accumulation would occur, rather than making the entire structure open or compromising its integrity. This localized modification maintains structural strength in critical areas while enabling debris discharge in areas where accumulation would cause maintenance issues.
Solution Approach 2:
The openings in the side plate members enable the structure to self-clean by allowing debris to fall through under gravity. This passive self-service mechanism eliminates the need for active cleaning systems or complex maintenance procedures, as the structure automatically prevents dirt accumulation during normal operation.
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 enhances the strength of the support device, stabilizes the front wheel's height, ensures precise plowing depth, and allows for easy maintenance by preventing dirt accumulation through gravitational discharge.
Implementation Method 1
dirt thrown up by the rotary working portions and then striking the guard member and falling can be gravitationally discharged from the opening
Data Source
AI summary
A front rotary working machine is provided which has rotary working portions disposed at a front portion of a transmission case, and a front wheel disposed forward of the rotary working portions. The working machine includes a guard member extending forward from the transmission case for guarding an upper side of the rotary working portions. A support device for supporting the front wheel is connected to the front portion of the transmission case. The support device has an upper portion connected to the guard member. A load applied from the front wheel to the support device is distributed to the transmission case and the guard member, resulting in strengthening of the support device.