Square Baler Gear Arrangement With Overload Clutch Braking
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Solution Overview
Problem
The increasing power requirements and larger flywheels in square balers lead to high inertia, causing startup difficulties and potential damage due to stalling, and require rapid braking to prevent overload situations.
Innovation Solution
A gear arrangement with two side gears, reduction gears, and flywheels, incorporating a switchable overload clutch in at least one reduction gear, allows for controlled power transmission and rapid braking to prevent damage during mechanical overloads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If larger and heavier flywheels are used to provide required drive power and reduce loads, then the drive power and energy storage capability are improved, but the weight and inertia increase causing startup difficulties and potential damage
Solution Approach 1:
The drive train is divided into two separate drive trains: a first drive train for accelerating the flywheel from standstill, and a second drive train for transmitting power during operation. This segmentation allows the flywheel to be accelerated independently without requiring the entire system to overcome high inertia simultaneously, thus reducing startup loads while maintaining the flywheel's power storage capability.
Solution Approach 2:
A coupling device is introduced as an intermediary between the flywheel and the working units. This coupling device can be selectively engaged or disengaged, allowing the flywheel to be accelerated independently when disengaged, and then connected to transmit power when engaged. This mediator resolves the contradiction by decoupling the acceleration phase from the power transmission phase.
2Use of energy by moving object
If larger flywheels are used to store more energy, then the energy storage capability is improved, but the inertia increases causing unwanted stalling of the drive unit during startup
Solution Approach 1:
The drive train is segmented into two independent paths: one dedicated to accelerating the flywheel (first drive train) and another for driving working units (second drive train). This allows the flywheel to accumulate energy without requiring the working units to be driven simultaneously, eliminating stalling issues while maintaining energy storage capability.
Solution Approach 2:
The flywheel is accelerated and stores energy in advance before the working units are engaged. The coupling device allows the flywheel to reach operational speed independently first, then connects to the working units. This preliminary action of accelerating the flywheel separately prevents drive unit stalling during startup.
3Duration of action of stationary object
If the flywheel is mechanically connected to working units from standstill, then the power transmission is continuous, but the high inertia causes damage to the engagement clutch
Solution Approach 1:
The flywheel is accelerated to operational speed in advance through the first drive train before the coupling device engages the second drive train to transmit power to working units. This preliminary acceleration separates the high-inertia startup phase from the power transmission phase, preventing excessive loads on the engagement clutch while ensuring continuous power transmission during operation.
Solution Approach 2:
The coupling device acts as an intermediary that controls the engagement between the flywheel and working units. It remains disengaged during flywheel acceleration to protect the clutch from high inertial loads, then engages smoothly when the flywheel reaches operational speed, enabling continuous power transmission without damaging the clutch.
4Force
If larger flywheels are used to reduce loads on drive train, then the load reduction is improved, but the braking distance increases making it difficult to prevent overload situations
Solution Approach 1:
The drive train is segmented into two independent paths, allowing the flywheel to be accelerated independently without requiring simultaneous braking of the entire system. This segmentation reduces the effective moving mass that must be braked, enabling faster stopping times while maintaining the flywheel's load-reducing capability during operation.
Solution Approach 2:
The coupling device provides dynamic control over the connection between the flywheel and working units. During braking, the coupling device can be disengaged to isolate the flywheel, reducing the effective inertia that must be braked and enabling faster response to overload situations while maintaining load reduction benefits during normal operation.
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 reduces startup loads and ensures reliable power transmission while preventing damage by allowing controlled acceleration and rapid braking of the drive train components.
Implementation Method 1
a first flywheel (16) connected between a first side gear (13) and a first reduction gear (14a)
Implementation Method 2
the increasing power requirements and larger flywheels in square balers lead to high inertia
Implementation Method 3
at least one of the reduction gears (14a, 14b) comprises a switchable overload clutch (34), which is designed to brake the reduction gears (14a, 14b) connected downstream of the flywheels (16) to a standstill in the event of a mechanical overload
Data Source
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AI summary
The present invention relates to a transmission arrangement (12) for a square baler (1), which drives a press piston (7) movably arranged between end positions in a press channel of the square baler (1) and at least one further working unit (5, 6, 8) of the square baler (1), wherein the transmission arrangement (12) comprises two side transmissions (13) and at least one reduction transmission (14a, 14b) downstream of each side transmission (13), which can be connected on the output side to a crankshaft (15) on which the press piston (7) is mounted, wherein at least one flywheel (16) is interposed between each side transmission (13) and the reduction transmission (14a, 14b) downstream thereof, wherein at least one of the reduction transmissions (14a, 14b) comprises a switchable overload clutch (34) which is designed to disengage the flywheels (16) in the event of a mechanical overload. downstream reduction gearbox (14a,14b) to brake to a standstill.