Aerating Device Eccentric Shaft Pivot Adjustment
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Solution Overview
Problem
Existing aerating devices face rapid wear of adjusting means due to high forces, limiting the robustness and durability of the angular adjustment mechanism for aerating pins.
Innovation Solution
The pivot points of the aerating arms are coupled via a shared shaft with an eccentric coupling, allowing adjustable positions on a circular path around the shaft, enhancing robustness and wear-resistance while maintaining versatile angular adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional adjusting means are used to displace and fix the pivot point of the first arm, then angular adjustment is achieved, but the adjusting means wear rapidly due to great forces
Solution Approach 1:
A bush is introduced as an intermediary element between the first arm and the shared shaft. The bush absorbs and distributes the mechanical forces, protecting the adjusting means from direct force exposure. This intermediary component allows the pivot point to be adjusted while preventing rapid wear of the adjustment mechanism itself.
Solution Approach 2:
The adjusting mechanism is enhanced by combining multiple materials with different properties. The bush is made from material selected for its wear resistance and force distribution capabilities, while the shared shaft uses materials optimized for rotational stability. This composite approach creates an adjusting system that can withstand great forces without rapid wear.
2Adaptability or versatility
If the pivot point is made displaceable and fixable relative to the frame, then angular adjustment of pins is achieved, but the device complexity increases
Solution Approach 1:
The shared shaft serves multiple functions simultaneously: it acts as a suspension for multiple pivot points, provides the adjustment mechanism through its rotation, and serves as a structural connection element. By making this single component multi-functional, the patent achieves angular adjustment capability without proportionally increasing device complexity.
Solution Approach 2:
Multiple adjustment functions are merged into a single shared shaft system. Instead of having separate adjusting mechanisms for each pivot point, the patent combines them all onto one shaft that can be adjusted collectively. This merging reduces the overall complexity compared to having individual adjustment mechanisms for each arm.
3Reliability
If a shared shaft with eccentric coupling is used to suspend pivot points, then robustness and wear-resistance increase, but the adjustable positions are limited to a circular path
Solution Approach 1:
The eccentric coupling creates a circular adjustment path for the pivot points, which is a deliberate geometric choice. This curved path provides sufficient angular adjustment range for practical applications while maintaining the robustness of the shaft-based suspension system. The circular geometry simplifies the mechanical design compared to more complex multi-axis adjustment mechanisms.
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 more robust and durable aerating device capable of withstanding high forces, ensuring precise angular adjustments and extended device lifespan through eccentric adjustability.
Implementation Method 1
this shaft has at least one eccentric coupling wherein the possible positions of the pivot points with respect to the shared shaft lie on a circle around said shaft
Data Source
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AI summary
The invention relates to a device for aerating a ground, comprising a frame (2) provided with moving means (4) for travel of the device over a ground surface, a crankshaft (14) which is bearing-mounted on the frame (2) and which can be coupled to a drive, a number of aerating means (21-23) connected to the frame (2) and connected to the crankshaft (14), wherein the aerating means (21-23) comprise at least one pin (45) which is adapted to perform a repetitive movement in a situation of use, wherein the pin (45) is inserted into the ground, wherein the movement is guided by at least two pivoting arms (18-20,24-26) of the aerating means (21-23) and wherein a number of first arms (24-26) of the aerating means (21-23) have a pivot point (44) which is displaceable and fixable relative to the frame (2). The invention is characterized in that the pivot points of a number of first arms (24-26) are coupled via a bush to a shared shaft (102) which is connected to the frame (2), and wherein this shared shaft (102) has at least one eccentric coupling.