Patent Application
20150230406
The present disclosure relates to a conveyer for a material processing machine.
Certain material processing machines, such as crop harvesters and windrowers, include a rotary crop conveyer which delivers crop from a cutterbar to conditioning elements. Hesitation of the crop or material between the cutting element and conditioning elements in a hay cutting platform results in uneven feeding of crop. This uneven feeding causes crop damage from recut crop with rotary cutterbars. Recut crop forms a dense wad in the resulting windrow that leads to poor local air circulation. This results in localized areas of high moisture within the windrow which results in lower quality bales or forage, often with mold in the wet areas.
Uneven feeding also causes poor conditioning quality and uneven windrows, for both rotary and sickle cutterbars. Because of the uneven feeding, the conditioner sees large clumps of crop followed by thin mats. This results in non-uniform conditioning of the crop and bunchy windrows. The resulting windrow does not dry uniformly, leading to a reduction in hay or forage quality. Uneven windrows also make it difficult for the following machine to process the windrow. This is especially true in the case of forage harvesters which have a noticeable decrease in capacity in uneven windrows.
In some cases it is desirable to run an auger at a different tip speed than the conditioner. In cases where the conditioner tip speed runs faster than the auger tip speed, the conditioner can grab crop and pull it across the slower moving flight or paddle causing damage to the crop. It is desired to provide an aggressive rotating crop conveying element to prevent crop hesitation and to thereby reduce crop damage and uneven feeding.
According to an aspect of the present disclosure, a material processing machine includes a rotary conveyer for delivering material to a material conditioner. The conveyer has a rotatable cylindrical body. One or more paddles are mounted on the body. In certain embodiment, each paddle has a first member and a second member. The first member has a radially outer end and a radially inner end. The inner end is attached to the body, and the first member is substantially parallel to a radial line through the first member and through the center of the conveyer. A second member is attached to the outer end of the first member with a section that is substantially perpendicular to the first member and further includes a formed section that is attached to the rotatable body at a distance from the inner end of the first member wherein the leading edge of the outer member extends beyond the outer end of the first member in the direction of rotation and the formed section trails the first member in the direction of rotation.
The second member is bent to form an inner part and an outer part. The inner part has an inner end attached to the body and spaced apart from the inner end of the first member. The outer part has a first end joined to an outer end of the inner part and has a second end. The outer end of the first member engages the outer part at a position located between the first and second ends of the outer part. The outer part of the second member is located substantially circumferential relative to the axis of the conveyor.
A distance between the inner end of the first member and the inner end of the inner part is greater than a distance between the outer end of the first member and the outer end of the inner part. A radial distance between the body and the second end of the outer part is greater than a radial distance between the body and the first end of the outer part. The second member forms a smoothly curved joint between its inner and outer parts.
In one embodiment, the paddle is a single integral part which has a main body or support portion and an edge or lip portion which is supported by the support portion. Support portion has a radially inner end which is attached to an outer surface of the body. Edge or lip portion is joined to support portion by a bent or curved portion. The support portion has an outer end which is aligned with or is not ahead of its inner end with respect to the direction of rotation of the body. Preferably, the support portion is parallel to the radial line which extends through the support portion and through the rotation axis of the body. The edge or lip portion is formed at an outer end of bent portion. The edge or lip portion is forward or advanced with respect to the outer end of the support portion, with respect to the direction of rotation of the body.
Referring to
Each paddle 16 has a first member 18 and a second member 20. The first member 18 has a radially outer end 22 and a radially inner end 24. The inner end 24 is attached to the body 14, such as by welding. The first member is parallel relative to a radial line which extends through the first member from the rotation axis of the body 14.
The second member 20 is bent to form an inner or first part 26 and an outer or second part 28. The inner part 26 has an inner end 30 attached to the body 14, such as by welding. The inner end 30 is spaced apart from the inner end 24 of the first member 18. The outer part 28 has a first end 34 joined to an outer end 32 of the inner part 26 and has a second end 36. The outer end 22 of the first member 18 engages and is attached (such as by welding) to the outer part 28 at a position located between the first end 34 and the second end 36 of the outer part 28. The second member 20 forms a smoothly curved joint 38 between its inner part 26 and its outer part 28.
A distance D1 between the inner end 24 of the first member 18 and the inner end 30 of the inner part 26 is greater than a distance D2 between the outer end 22 of the first member 18 and the outer end 32 of the inner part 26. A radial distance R1 between the body 14 and the second end 36 of the outer part 28 is greater than a radial distance R2 between the body 14 and the first end 34 of the outer part 28. The distances D1 and D2 are aligned perpendicularly with respect to an axial plane of the conveyer 10.
Preferably, the joint 38 has an outer rounded surface that trails the aggressive edge formed by the second end of the outer part 28. This rounded surface allows crop to be pulled over the trailing surface of the paddle 16 without causing crop damage. This feature allows the conditioner 12 to run with a higher peripheral speed than the conveyer 10 without adversely affecting the crop.
Referring now to
Referring now to
Referring now to
Referring now to
Referring now to
Referring now to
Referring now to
The result is an aggressive paddle element on a rotary conveying element to positively move crop from a cutting element to the conditioning elements. The paddle element is located between the cutting element and the conditioning element. The conditioning element serves as a rotary stripper to pull crop off the conveying element and into the conditioning element. The bent section of the outer member allows the conditioning element to pull crop over the trailing surface of the paddle without damaging the crop or impeding crop flow.
This paddle design also provides more structural rigidity for the conveyer 10. Both the first and second members are welded to the body 14 to improve rigidity of the assembly. This gives more durability in adverse conditions such as rocky conditions. It also allows the conveying element to have a smaller size than if the paddle element had lesser structural integrity. A smaller conveying element improves crop flow as it does not have to elevate crop as far to get into the conditioner element. The leading edge of the second member extends beyond the first member in the direction of rotation to allow space to attach it to the first member by welding.
The result is a structure which feeds crop from a cutterbar to a conditioner while allowing the crop to be accelerated by the conditioner without causing crop damage. This improved rotary crop conveying element leads to faster windrow drying. The improved paddle type element includes an aggressive edge or surface for uniformly delivering crop from a cutterbar to a conditioning element. This paddle design could be used on an overshot auger in front of a roll conditioner with a rotary cutterbar. It could also be used on other similar types of machines, such as any type of roll conditioner, as well as any impeller type conditioner, or a conventional sickle cutterbar, and on undershot augers.
While the disclosure has been illustrated and described in detail in the drawings and foregoing description, such illustration and description is to be considered as exemplary and not restrictive in character, it being understood that illustrative embodiments have been shown and described and that all changes and modifications that come within the spirit of the disclosure are desired to be protected. It will be noted that alternative embodiments of the present disclosure may not include all of the features described yet still benefit from at least some of the advantages of such features. Those of ordinary skill in the art may readily devise their own implementations that incorporate one or more of the features of the present disclosure and fall within the spirit and scope of the present invention as defined by the appended claims.
