Adjustable Torque Pressing Mechanism for Bale Wrapping Reel Replacement
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Solution Overview
Problem
The existing bale wrapping devices for round balers require significant effort to replace the supply reel due to the weight and the need to overcome the controlling torque applied by the pressing device, making the process cumbersome and inefficient.
Innovation Solution
A bale wrapping device with a pressing device that can pivot away from the supply reel and adjust its contact point to alter the controlling torque, allowing for reduced effort in replacing the reel by shifting the contact point to assist in pivotal movements, thus minimizing the need to release the pressing device from the power means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressing device maintains constant controlling torque on the supply reel, then the wrapping material is properly tensioned during wrapping, but the effort required to replace the supply reel increases significantly
Solution Approach 1:
The pressing device incorporates adjustable controlling torque that can be modified during operation. The torque is adapted between two states: a first torque during wrapping that maintains proper tension on the wrapping material, and a second reduced torque during reel replacement that facilitates easy removal and installation of supply reels. This dynamic adjustment resolves the contradiction by making the system compliant during maintenance while maintaining reliability during operation.
2Manufacturing precision
If the pressing device is heavily preloaded to ensure proper wrapping tension, then the wrapping quality is maintained, but the supply reel becomes difficult to replace due to the strong pressing force
Solution Approach 1:
The pressing device allows dynamic adjustment of the pressing force between a first pressing force during wrapping that ensures high wrapping quality, and a second reduced pressing force during reel replacement that minimizes resistance. This temporal separation of force levels resolves the contradiction between maintaining manufacturing precision and ensuring ease of operation.
3Device complexity
If the contact point of the power means is fixed on the pressing device, then the structure is simple, but the controlling torque cannot be adjusted to assist during reel replacement
Solution Approach 1:
The contact point of the power means is made movable along the pressing device between a first position during wrapping that generates optimal controlling torque for maintaining wrapping tension, and a second position during reel replacement that reduces or reverses the controlling torque to assist in pivoting the pressing device away from the reel. This positional adjustment resolves the contradiction between structural simplicity and operational ease.
4Reliability
If the pressing device remains in engagement position during reel replacement, then the wrapping tension is maintained, but the access to the supply reel is limited and replacement effort increases
Solution Approach 1:
The pressing device is designed to pivot between an engagement position during wrapping that maintains reliable tension on the wrapping material, and a standby position during reel replacement that provides full access to the supply reel. The controlling torque is dynamically adjusted to assist this pivoting motion, resolving the contradiction between maintaining reliability and improving accessibility.
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 design reduces the effort required for replacing the supply reel and facilitates easier access to the reel, enhancing the efficiency and user-friendliness of the wrapping process while maintaining tension on the wrapping material.
Implementation Method 1
the power means which generate via the contact point a controlling torque which acts on the pressing device
Implementation Method 2
a pretensioning moment is thereby transferred to the supply reel so that during a wrapping process the wrapping material is wound round the bale under a certain tension
Data Source
AI summary
A bale wrapping device is described for a round baler. The bale wrapping device may include a supply reel for the wrapping material and a pressing device wherein the pressing device in an engagement position stands in engagement with the supply reel and for a standby position can be pivoted away from the supply reel, wherein the pressing device is connected at a contact point positioned on the pressing device to power means which generate via the contact point a controlling torque which acts on the pressing device. In order to facilitate the replacement of the supply reel and more particularly the pivoting of the pressing device out from an engagement position into a standby position, an adjusting means may be provided through which the contact point can be shifted and thus the controlling torque can be altered.