Seed Drill Pressing Device Crossbeam Lever Adjustment
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Solution Overview
Problem
Existing seed drills face issues with power transmission for adjusting the closing device, leading to inadequate force transfer and potential damage due to excessive forces, as the frame elements used are not designed to absorb and transmit large forces effectively.
Innovation Solution
The closing device is attached to a rotatably mounted crossbeam on the main frame via spring elements, allowing for rotational movement conversion into vertical movement, providing a lever effect for adjusting working depth and pressure, and incorporating a central adjustment element with a variable length for precise control, ensuring maximum power transmission and overload protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the closing device is attached to frame elements not assigned to the main frame, then the device complexity is reduced, but the force transmission capability deteriorates
Solution Approach 1:
The closing device is segmented into a crossbeam component that can rotate independently on the main frame, allowing force transmission through a dedicated rotational connection rather than relying on general-purpose frame elements. This segmentation enables the crossbeam to specifically handle the force transmission requirements of the closing device.
Solution Approach 2:
The crossbeam acts as an intermediary element between the main frame and the closing device. It receives rotational movement from the main frame and converts it into vertical movement of the closing device through lever arms, serving as a specialized mediator for force and motion transmission.
2Measurement precision
If the closing device is subjected to large adjusting forces, then the adjustment precision is improved, but the risk of frame element damage increases
Solution Approach 1:
Spring elements are incorporated into the support arms to provide beforehand cushioning. These springs absorb excess forces and prevent direct transmission of large adjusting forces to the frame elements, while still allowing precise adjustment through controlled rotational movement of the crossbeam.
Solution Approach 2:
The crossbeam serves as a protective intermediary that converts rotational movement into vertical adjustment motion through lever arms. This mechanism allows precise control of the closing device position while distributing forces through a dedicated structure rather than directly loading the main frame elements.
3Force
If the closing device is pressed against the ground with high force, then the working depth is improved, but the adaptability to uneven terrain deteriorates
Solution Approach 1:
The support arms are made dynamic through the incorporation of spring elements, allowing the closing device to adapt its position and force application to varying terrain conditions. The springs enable the system to maintain working pressure on average while allowing local deviations to follow ground contours.
Solution Approach 2:
The spring elements in the support arms allow the system to change its mechanical parameters (force distribution, position) in response to terrain variations. This enables the closing device to maintain effective working pressure while adapting to uneven ground conditions through elastic deformation of the springs.
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
This configuration ensures consistent and qualitative work results by effectively transmitting forces to the closing device, preventing damage from uneven terrain and obstacles, while allowing for precise adjustment and energy-efficient operation.
Implementation Method 1
the at least one support arm is attached in its front region via spring elements to the cross member
Implementation Method 2
The at least one support arm then acts like a lever and, by pivoting, converts the rotational movement of the cross member into a vertical movement of the brushing and/or pressing device attached to the support arm
Implementation Method 3
Due to the lever ratios defined by the diameter of the cross member and the length of the support arm, a small rotational movement can advantageously be converted into a comparatively strong vertical movement of the support arm
Data Source
Figure 1
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AI summary
Agricultural seed drill (1) comprising a main frame (8), a frame element (10) arranged on the main frame and supporting a loading platform (9), several seed coulter units (5) articulated to the main frame (8) via retaining elements, and a raking and/or pressing device (12) which comprises at least one support beam (13) arranged transversely to the direction of travel (F), which is attached to at least one support arm (15) projecting forward in the direction of travel and articulated in its front area, and on which several raking and/or pressing elements (14) are arranged transversely to the direction of travel, wherein the raking and/or pressing device (12) is raised, lowered and/or subjected to pressure against the ground by means of a central adjusting element (22).In order to enable adjustment of the squeezing and/or pressing device, it is provided that the squeezing and/or pressing device (12) comprises a cross member (16) which is rotatably mounted on the main frame (8) about an axis running horizontally transverse to the direction of travel, and which has at least one support arm (15) attached to the cross member (16) in its front area via spring elements (17).