Agricultural Baler Overload Protection via Sensor-Controlled Braking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Agricultural balers suffer permanent damage and extended downtime due to overload conditions, as existing torque limiters are often damaged or destroyed during blockages, requiring replacement and maintenance time.
Innovation Solution
A baler with a controllable decoupling mechanism and sensor system that detects overload conditions before damage occurs, allowing for controlled disengagement of the flywheel from the connector, preventing damage and enabling immediate reuse after the overload is resolved, utilizing a clutch and transmission system for smooth operation and automatic protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a torque limiter (e.g., shearing bolt or slip clutch) is used to protect the baler from overload damage, then damage to parts is prevented, but the torque limiter itself is damaged or destroyed during overload conditions, requiring replacement and causing downtime
Solution Approach 1:
A sensor is introduced as an intermediary element that detects overload conditions (torque, temperature, vibration) before they cause damage to the drivetrain. The sensor sends signals to a controller that activates the braking mechanism, creating a mediation system between the overload condition and the physical components, allowing protection without direct damage to the limiting mechanism.
Solution Approach 2:
The patent replaces the purely mechanical torque limiter (shearing bolt or slip clutch) with a sensor-based detection system and electronically controlled braking mechanism. This substitution allows for precise detection and controlled response to overload conditions, eliminating the need for mechanical failure to trigger protection.
2Strength
If a mechanical torque limiter is used to prevent damage during blockage, then damage to drivetrain parts is avoided, but the limiter becomes damaged or destroyed requiring repair time
Solution Approach 1:
The system performs self-diagnosis through sensors that continuously monitor drivetrain conditions. When an anomaly is detected, the controller automatically activates the braking mechanism to protect the drivetrain, enabling the system to protect itself without external intervention or mechanical sacrifice of a limiter component.
Solution Approach 2:
Sensors provide continuous feedback on drivetrain conditions (torque, temperature, vibration) to the controller, which adjusts the braking mechanism accordingly. This closed-loop feedback system allows for real-time protection adjustments without requiring mechanical limiters to fail to trigger the protective action.
3Object-affected harmful factors
If the flywheel is decoupled from the connector during overload, then damage is prevented, but traditional mechanical limiters require replacement after activation causing additional downtime
Solution Approach 1:
The patent replaces the mechanical decoupling mechanism with an electronically controlled braking system. When sensors detect overload conditions, the controller activates the brake to slow and stop the flywheel, providing decoupling protection without mechanical wear or damage to limiters that would require replacement.
Solution Approach 2:
The braking mechanism serves as an intermediary that provides controlled decoupling protection. Instead of direct mechanical failure to trigger protection, the brake acts as a mediator that can be precisely controlled by the sensor-system, protecting the drivetrain without sacrificing components.
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
Prevents permanent damage to the baler's drivetrain during overloads by detecting and responding to torque thresholds, allowing for immediate resumption of operation without additional downtime, and includes a braking mechanism to manage kinetic energy and reduce wear.
Implementation Method 1
The sensor may sense a torque transferred by the drivetrain, a rotational speed of the flywheel, and/or any other relevant condition
Implementation Method 2
The controllable member comprises a clutch. A clutch may allow the decoupling mechanism to be switched from the engaged state to the disengaged state
Implementation Method 3
The drivetrain comprises a transmission that is switchable between a startup state and a running state, wherein in the startup state the transmission is configured to only partially transmit rotational movement of the PTO to the flywheel
Implementation Method 4
includes a braking mechanism to manage kinetic energy and reduce wear
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The invention relates to an agricultural baler (1) comprising a flywheel (2) and a drivetrain for coupling the flywheel (2) to a connector (4) that is arranged to be connected to a power take-off (PTO) (3) of a tractor, wherein the drivetrain includes a decoupling mechanism for decoupling the flywheel (2) from the connector (4) in case of an overload, wherein the decoupling mechanism comprises a controllable member that is movable between an engaged state in which the flywheel (2) is coupled to the connector (4) and a disengaged state in which the flywheel (2) is decoupled from the connector (4), and a detector for detecting the overload, wherein the detector is arranged to provide an overload signal to the controllable member triggering the controllable member into the disengaged state. The invention also relates to a method of protecting an agricultural baler (1) from damage.