Soil Cultivating Machine Depth Adjustment Mechanism
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Solution Overview
Problem
Existing soil cultivating machines face challenges in maintaining consistent prestressing conditions and ground pressure when adjusting the working depth of tillage tools, affecting ground adaptation and tool deflection.
Innovation Solution
A working depth adjustment device with an adjustable separation point between the support arm and its bearing, allowing transverse displacement and fixation in various positions, maintains the angle of attack and lever arm unchanged, ensuring consistent prestressing ratios through a sliding guide with bearing plates that can be clamped in different positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the support arm is telescopic or slidably mounted to adjust working depth, then the working depth can be changed relative to other tools, but the ground pressure and prestressing conditions change adversely
Solution Approach 1:
The support arm is divided into two separable parts: a first support arm portion rigidly connected to the bearing, and a second support arm portion carrying the tillage tool. These portions can be separated and reconnected at different positions along the longitudinal axis, allowing depth adjustment without changing the effective length or angle of the support arm. This segmentation enables working depth variation while maintaining constant ground pressure and prestressing conditions.
Solution Approach 2:
A bearing plate with a longitudinal slot and a corresponding bearing element act as intermediaries between the first and second support arm portions. The bearing element can be positioned at different locations within the slot, serving as a mediator that allows separation and reconnection of the support arm portions at adjustable positions while maintaining the structural integrity and mechanical properties of the support arm system.
2Adaptability or versatility
If the support arm length or angle is changed to adjust working depth, then depth adjustment is achieved, but the lever ratios and prestressing ratios change
Solution Approach 1:
The support arm is segmented into adjustable portions that can be separated and reconnected at different positions. This segmentation allows the working depth to be adjusted by changing the position of the second support arm portion relative to the first portion, while the total effective length and angle of the support arm remain unchanged, thereby maintaining constant lever ratios and prestressing ratios.
Solution Approach 2:
The invention changes the positional parameter of the bearing element within the bearing plate's longitudinal slot to adjust working depth. By varying the position of the bearing element along the slot rather than changing the overall dimensions or angle of the support arm, the system achieves depth adjustment while maintaining stable lever ratios and prestressing conditions.
3Adaptability or versatility
If the support arm is pivoted to adapt to ground conditions, then ground adaptation is improved, but the ground contact pressure becomes sensitive to multiple factors
Solution Approach 1:
The support arm is divided into separable portions that maintain a consistent structural relationship. The first support arm portion rigidly connected to the bearing and the second support arm portion carrying the tool create a stable configuration that ensures consistent ground contact pressure while allowing the support arm to pivot for ground adaptation. This segmentation isolates the pivot movement from changes in ground pressure conditions.
Solution Approach 2:
Instead of allowing the entire support arm to pivot freely and become sensitive to ground conditions, the invention inverts the approach by fixing the support arm in a predetermined angle and position, allowing only the tool portion to adjust. This inversion maintains stable ground contact pressure while still enabling ground adaptation through the adjustable connection between support arm portions.
Data Source
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Figure 3~4
AI summary
Tools (3) for working with soil fasten on supporting arms (4), which are each fitted so as to swivel on an axle on a frame support (6) via a supporting-arm bearing (5). A device (7) for adjusting working depth has an adjustable disconnecting point between a supporting arm and a supporting-arm bearing, through which the supporting arm can be relocated opposite to the supporting-arm bearing crosswise to its longitudinal direction and can be fixed in several positions.