Press Roll Cylindrical Portion for Twine Wrapping Prevention

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Solution Overview

Problem

In round balers, twines often get wrapped around press rolls instead of the bales due to the bars on the press rolls holding onto the twine, leading to inefficient operation and operator dissatisfaction.

Innovation Solution

The implementation of cylindrical portions on the press rolls and a scraper element with a scraping edge to guide twines away from the press rolls, ensuring they wrap around the bales instead, along with a dispensing arm for precise twine insertion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If bars are mounted on press rolls to effectively press agricultural residues, then pressing effectiveness is improved, but twines wrap around the press rolls instead of the bales causing operational inefficiency

Engineering Contradiction:

Improvebaling efficiencyVSAvoidtwine wrapping around press rolls

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

A guide member is introduced as an intermediary component between the press roll and the twine. The guide member has a guide surface that directs the twine away from the press roll bars and toward the bale, preventing the harmful interaction between the twine and press roll bars while maintaining the pressing function.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The harmful function of the press roll bars (catching and wrapping twine) is separated from the useful function (pressing agricultural residues). The guide member extracts the twine guidance function from the press roll system, allowing the press roll to focus solely on pressing without the side effect of twine wrapping.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If twines are dispensed proximate to press rolls for bale wrapping, then wrapping operation is simplified, but bars on press rolls hold onto twine causing wrapping failures

Engineering Contradiction:

Improvetwine dispensing convenienceVSAvoidtwine wrapping reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The guide member acts as a mediator that receives the twine from the dispensing arm and redirects it onto the bale. This maintains the convenient proximate dispensing location while ensuring reliable wrapping by preventing the twine from being caught by the press roll bars.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The guide surface of the guide member creates a preliminary diverging path for the twine before it can be caught by the press roll bars. This preliminary action prevents the harmful interaction from occurring, ensuring the twine follows the intended path onto the bale.

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS10813293B2Round baler press roll with a uniform cylindrical portion

Publication Date: 2020.10.27 DEERE & CO

AI summary

A round baler for forming a bale of residual product includes a baling chamber, a plurality of press rolls mounted within the baling chamber, and at least one driving bar associated with at least one of the plurality of press rolls. The driving bar extends at least partially along the length of at least one of the plurality of press rolls. The round baler further includes at least one cylindrical portion defined partially along the length of the at least one of the plurality of press rolls. The at least one cylindrical portion is arranged to compensate for a radial extension of the at least one driving bar to define a uniform surface.