Chopping unit of a forage harvester and shear bar for a chopping unit

Patent metadata

Field	Value
Publication number	US-11596107-B2
Application number	US-201815941028-A
Country	US
Kind code	B2
Filing date	Mar 30, 2018
Priority date	Mar 31, 2017
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

A chopping unit (10) of a forage harvester, having a chopping drum (11) bearing chopping blades (15), having a shear bar carrier (17) bearing a shear bar (16) for the chopping blades (15), wherein a top side (20), facing away from the shear bar carrier (17), of the shear bar (16) provides a cutting edge (21) of the shear bar (16), wherein the top side (20) of the shear bar (16) is contoured such that the top side (20) of the shear bar (16) is inclined, at least in a top-side portion (26) facing the chopping drum (11), continuously in the direction of the chopping drum (11) in the contact region with the chopping blades, as seen in the axial direction of the chopping drum (11).

First claim

The invention claimed is:

1. A chopping unit ( 10 ) of a forage harvester comprising,
a chopping drum ( 11 ) bearing chopping blades ( 15 ),
a shear bar carrier ( 17 ) bearing a shear bar ( 16 ) for the chopping blades ( 15 ), wherein a top side ( 20 ) of the shear bar ( 16 ), facing away from the shear bar carrier ( 17 ), provides a singular cutting edge ( 21 ) of the shear bar ( 16 ) adjacent the chopping drum ( 11 ),
wherein
the top side ( 20 ) of the shear bar ( 16 ) extends between the singular cutting edge ( 21 ) adjacent the chopping drum 11 and an opposite edge ( 22 ) of the shear bar ( 16 ) and has a plurality of planar segments, including a first top-side planar segment ( 27 ) and a second top-side planar segment ( 26 ) of the shear bar ( 16 ) and wherein the second top-side planar segment ( 26 ) extends from the singular cutting edge ( 21 ) towards the middle portion and the first top-side planar segment ( 27 ) extends from the opposite edge ( 22 ) toward the first top-side planar segment ( 26 ), and wherein the shear bar ( 16 ) generally increases in thickness from the singular cutting edge ( 21 ) to a middle portion of the shear bar ( 16 ) and also generally increases in thickness from the opposite edge ( 22 ) to the middle portion thereby forming roof-shaped contouring of the top side ( 20 ) of the shear bar ( 16 ).

2. The chopping unit 10 claimed as in claim 1 , further comprising two additional top-side segments ( 24 ), one of the additional top-side segments being disposed between the cutting edge ( 21 ) and the second top-side planar segment ( 26 ) and the other of the additional top-side segments being disposed between the opposite edge ( 22 ) and the first top-side planar portion ( 27 ).

3. The chopping unit 10 as claimed in claim 2 , wherein the two additional top-side portions are parallel or approximately parallel to the underside ( 25 ) of the shear bar ( 16 ).

4. A chopping unit ( 10 ) of a forage harvester comprising,
a chopping drum ( 11 ) bearing chopping blades ( 15 ),
a shear bar carrier ( 17 ) bearing a shear bar ( 16 ) for the chopping blades ( 15 ), wherein a top side ( 20 ) of the shear bar ( 16 ), facing away from the shear bar carrier ( 17 ), provides a singular cutting edge ( 21 ) of the shear bar ( 16 ) adjacent the chopping drum ( 11 ),
wherein
the top side ( 20 ) of the shear bar ( 16 ) extends between the singular cutting edge ( 21 ) adjacent the chopping drum ( 11 ) an opposite edge ( 22 ) of the shear bar ( 16 ) and has a plurality of planar segments including a first top-side planar segment ( 27 ) and a second top-side planar segment ( 26 ) and wherein the second top-side planar segment ( 26 ) extends from the singular cutting edge ( 21 ) towards the middle portion and the first top-side planar segment ( 27 ) extends from the opposite edge ( 22 ) toward the first top-side planar segment ( 26 ) at the middle portion thereby forming roof-shaped contouring of the top side ( 20 ) of the shear bar ( 16 ).

5. The chopping unit ( 10 ) of a forage harvester according to claim 4 further comprising two additional top-side segments ( 24 ), one of the additional top-side segments being disposed between the cutting edge ( 21 ) and the second top-side planar segment ( 26 ) and the other of the additional top-side segments being disposed between the opposite edge ( 22 ) and the first top-side planar portion ( 27 ).

6. The chopping unit ( 10 ) of a forage harvester according to claim 5 , wherein the two additional top-side portions are parallel or approximately parallel to the underside ( 25 ) of the shear bar ( 16 ).

Assignees

• Claas Saulgau Gmbh

Inventors

• Wehner Gregor
• Unger Josef
• Hugger Manuel

Classifications

• B02C18/2283

  using rollers (B02C18/225 takes precedence) · CPC title

• B02C18/145

  with knives spaced axially and circumferentially on the periphery of a cylindrical rotor unit · CPC title

• B02C18/18 Primary

  Knives; Mountings thereof · CPC title

• B02C2018/188

  Stationary counter-knives; Mountings thereof · CPC title

• A01F29/095

  Mounting or adjusting of knives · CPC title