Agricultural Pick-Up Device with Synchronized Hold-Down Roller
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Solution Overview
Problem
The existing pick-up devices for agricultural harvesting machines face inefficiencies in collecting crops due to crops sliding off the tines and blockages in the crop channel, particularly at the beginning of the collection process, leading to reduced operational security.
Innovation Solution
A pick-up device with a rotationally driven pick-up drum and hold-down roller, where the speed of the hold-down roller is variable and synchronized with the pick-up drum's speed, and a common drive supply path allows for proportional speed adjustment, including a hydraulic system with check valves for unblocking and a mechanical transmission for adapting to crop properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hold-down roller is stationary or driven at fixed speed, then the structure is simple, but crop blockages occur in the channel particularly at the beginning of collection
Solution Approach 1:
The hold-down roller is equipped with a variable speed drive that dynamically adjusts its rotation speed based on operational conditions. The control unit receives signals from sensors detecting crop flow conditions and modifies the roller's speed accordingly, transforming it from a static or fixed-speed component to a dynamic one that adapts to prevent blockages.
Solution Approach 2:
A control unit with sensors monitors the crop flow conditions in real-time and provides feedback to the variable speed drive of the hold-down roller. When blockage is detected or anticipated, the system automatically adjusts the roller speed to maintain optimal crop flow, creating a closed-loop control system that enhances reliability.
2Productivity
If the hold-down roller rotates at high speed, then crop transport is smooth, but energy consumption increases
Solution Approach 1:
The hold-down roller's speed is dynamically adjusted based on actual crop flow conditions rather than operating at constant high speed. During high-productivity phases, the roller rotates faster to maintain smooth transport, while during low-flow conditions or blockage prevention phases, the speed is reduced, optimizing the balance between productivity and energy consumption.
Solution Approach 2:
The rotation speed parameter of the hold-down roller is changed dynamically based on operational requirements. The control system modifies this parameter to match crop flow rate, ensuring high speed only when necessary for maintaining productivity, thereby reducing overall energy consumption while preserving crop collection efficiency.
3Ease of operation
If multiple independent drive connections are used for pick-up drum and hold-down roller, then speed control is precise, but attachment and detachment becomes time-consuming
Solution Approach 1:
The drive systems of the pick-up drum and hold-down roller are merged into a single common drive connection. This unified drive transmits power to both components through a shared transmission system, allowing both to be attached and detached together as one unit, significantly reducing attachment time while maintaining coordinated speed control through the common power source.
Solution Approach 2:
The common drive connection serves multiple functions: it powers both the pick-up drum and the hold-down roller, provides a unified attachment interface, and enables coordinated operation of both components. This multi-functional design simplifies the attachment process while maintaining the flexibility needed for speed control through the shared drive system.
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 solution enhances the operational security and efficiency of crop collection by minimizing crop loss and blockages, allowing for smooth and reliable transport of crops through the channel, even at the start of the process.
Implementation Method 1
The supply path can in particular comprise a hydraulic line which feeds at least one hydraulic motor driving the pick-up drum and hold-down roller
Implementation Method 2
Frictional contact can be taken. With the help of these hold-down rollers, the harvested crop can be picked up much more reliably and evenly
Data Source
Figure 1~2
Figure 3
AI summary
The device (1) has a rotary driven picking drum (5) arranged to lift crops (2) from an earth surface by rotation and supply the crops to a crop channel (7) limited by blank holder rollers (12, 13). The blank holder rollers are rotary driven at rotation speed that is varied depending on rotation speed of the drum. The drum and the blank holder rollers are supplied with driving power over a common supply channel. The supply channel comprises a hydraulic passage over which hydraulic motors of the drum and the rollers are connected in series.