US3738584A - Device in striking cutters - Google Patents

Device in striking cutters Download PDF

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Publication number
US3738584A
US3738584A US00081414A US3738584DA US3738584A US 3738584 A US3738584 A US 3738584A US 00081414 A US00081414 A US 00081414A US 3738584D A US3738584D A US 3738584DA US 3738584 A US3738584 A US 3738584A
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United States
Prior art keywords
rotor
holder
counterknives
pivot axis
counterknife
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00081414A
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English (en)
Inventor
S Gronberg
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Individual
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Individual
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Publication date
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Publication of US3738584A publication Critical patent/US3738584A/en
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F29/00—Cutting apparatus specially adapted for cutting hay, straw or the like
    • A01F29/02—Cutting apparatus specially adapted for cutting hay, straw or the like having rotating knives with their cutting edges in a plane perpendicular to their rotational axis
    • A01F29/04—Cutting apparatus specially adapted for cutting hay, straw or the like having rotating knives with their cutting edges in a plane perpendicular to their rotational axis with feeding direction transverse to axis

Definitions

  • ABSTRACT A striking cutter for disintegrating crops or the like in which a rotor having radially projecting knifearms which, during rotation, pass between a plurality of counterknives detachably arranged in a row on a holder, with the holder being pivotably suspended in the rotor housing and the counterknives being pivotably journalled and supported by a rest thereby enabling the counterknives to be partly or totally disengaged from the knifearms of the rotor.
  • the counterknives further have been arranged rigidly connected to a shaft, which, by means of a pulling spring, is held against a stop. If a foreign object should give an exceptional large resistance when passing through the space between the counterknives, the same will turn away against the action of the pulling spring.
  • a drawback in this construction, however, is that the spring must take all the force which is excerted by the rotating knives.
  • the knives be manufactured in a thinner steel-material in order to eliminate the hitherto usual sharpening of one side of the knife to an edge. If, the thickness of the counterknives is reduced, the risk that they break at an overload will, however, at the same time be increased. As the rate of disintegration is dependent on the counterknives being intact, it is necessary to exchange the defective counterknives, which hitherto has been a relatively complex operation which caused remarkable stoppages.
  • the purpose of the present invention is to provide a device in a striking cutter of the above mentioned type in which the above mentioned drawbacks are eliminated.
  • the essential characteristics of the invention are that the holder, by means of a hinge, is pivotably connected to a machinery housing enclosing the rotor in such a manner that the length of the end portions of the counterknives projecting between the arms of the kniferotor is variable, and that the counterknives are pivotably journalled around a journalling point or around a shaft which is common for all knives and are supported by a support at some distance from the journalling point or the shaft respectively, the rest being yieldably or pivotably formed against the action of resilient members so that the end portions of the coun' terknives may be totally or partly disengaged from the knifearms of the rotor.
  • FIG. 1 shows a section through the part of a striking cutter in which a number of counterknives are arranged
  • FIG. 2 is a similar section through a modified embodiment
  • FIGS. 3 and 4 show sections through further embodiments of the device illustrated in FIGS. 1 and 2, and
  • FIG. 5 shows a section through a part of a striking cutter having counterknives turnable 360.
  • the striking cutter shown in the drawings comprises a machinery housing 1 in ends 2 of which a kniferotor 3 is journalled, the rotor being provided with knifearms 4 projecting gradually therefrom.
  • a number of slots 5 for counterknives 6 between which the knives 4 pass as the rotor rotates.
  • the counterknives 6 rest against a fixed stop 7 on the housing 1 and at some distance from the stop are carried by a holder 8.
  • This holder is, at the housing 1, provided with a number of slots 9 positioned just in front of the slots 5, through which the rear end of the counterknives 6 project.
  • the slots 5 and 9 are slightly broader than the thickness of the counterknives so that this sidewise will be effectively guided.
  • the counterknives are, at their lower longside, provided with a recess or notch 10 which is designed to be attached to the holder 8.
  • the holder 8 is turnably connected to the housing 1 via a hinge Ill in such a way that the length of the part of the counterknives projecting between the arms 4 of the kniferotor are variable. By the aid of a screw 12 and nuts 13 the length of the counterknives may be adjusted.
  • a section bar 14 On the other side of the row of counterknives, there is arranged a section bar 14 which is pressed to engagement against the counterknives by a pressure spring 15, the spring having its opposite end resting against a holder 16.
  • a rod 17 is connected thereto, and the rod is provided with limiting. stops l8 and 19 in the form of nuts.
  • the recess is preferably located at midway of the length of the counterknife, whereby the knife may be turned around.
  • the section bar 14 may by the aid of a not shown lever e.g., and eccentric be raisable against the action of the spring 15 to such an extent that the counterknives may be detached from their respective slots 9.
  • the counterknives 6 rest against a rubber block 21 which is located on a bracket and which is compressed when the load on one or more counterknives exceeds a predetermined value, whereupon the counterknife effects a swinging movement so that it is partly disengaged from the rotorknife 4.
  • the counterknives 6 are turnable around a common shaft 22, which is journalled in lugs on the holder 8.
  • the counterknives may be entirely disengaged from the knifearms 4 of the rotor.
  • a supporting device 23 for the counterknives is turnable around a hinge 24.
  • the supporting device 23 may comprise a shock-absorber 23a of a hard rubber material having low flexibility, which is pressed to engagement against the counterknives by a pressure spring 25.
  • a trunnion 26 which is formed with a step 27 and an end plate 28.
  • the trunnion 26 extends through a hole 29 in the holder 8, with the hole being somewhat larger than the largest cross-section of the trunnion in level with the step 27.
  • a pressure spring 30 is positioned between the holder 8 and supporting device 23 .
  • the supporting device 23 will turn in a counter-clock-wise direction against the action of spring 25, whereby the trunnion 26 is moved downwards in the hole 29 thereby causing the stop 27 to loose its grip against the portion around the hole whereby the freed holder, due to the action exerted by the spring 30, may turn around the hinge 11.
  • the counterknives also will be moved'in a direction from the knifearms 4 of the rotor, whereby the knifearms are entirely freed from the counterknives. As soon as the thrust on the counterknives ceases, the supporting device 23 may turn back to its original position to contact against the counterknives 6.
  • a link 31 is articulated between support device 23 and holder 8 in such a way that a movement of the supporting device 23 around the hinge 24 in a counter-clock-wise direction will result in a movement of the holder 8 in a direction from the striking cutter.
  • the force at which the supporting device has to be moved is determined by pressure spring 32 which, with one of its ends, rests against the side of the holder which is turned from the housing, while the other end rests against a stop nut 33 screwed on a threaded trunnion 34, which is pivotably attached to the housing 1 and which is guided through a hole 35 in the holder 8.
  • each counterknife 6 consists of several mutually connected knifearms 6a, 6b, 6c and 6d.
  • the arms are arranged in the form of a cross but it is, of course, also possible to arrange the arms in another number and another pattern.
  • the counterknives are arranged freely rotatable on a shaft 39 which is common for all knives. At the free ends of each counterknife is arranged a recess 40 intended to cooperate with a trunnion 42 acted upon by a spring 41. At an overload on one or more counterknives, the trunnion or the trunnions 42 respectively will be pressed from engagement with their respective counterknives which, due to the heavy impact, will be turned so much that the recess 40 of the next knifearm will be just in front of the trunnion 42.
  • a disintegrator for straw and similar material comprising a housing, a rotor within said housing, said rotor being provided with a plurality of knives in spaced relationship along the length of the rotor, said knives extending radially from the rotor and each knife having a tip, and a plurality of spaced counterknives projecting into the housing and extending inwardly beyond the tips of the radially projecting knives and being cooperable therewith for disintegrating the material, and a holder for the counterknives, the counterknives being rotatably mounted on the holder about a pivot axis common to all counterknives and generally parallel to the axis of the rotor, the improvement comprising hinge means attached to the housing and the holder, means to adjust the distance between the pivot axis and the axis of the rotor, and support means at each counterknife for resiliently restraining rotation of the counterknife with respect to the pivot axis.
  • each counterknife includes a block of rubber secured to the housing so that a portion of the counterknife between the pivot axis and the axis of the rotor will rest thereon.
  • the disintegrator as claimed in claim 2 including a second holder in which said rubber block is mounted, a means hingedly connecting the holder to the housing about an axis generally parallel to the pivot axis of the rotor, a means biasing the holder to a position in which the portion of the counterknife between the pivot axis and the rotor axis rests thereon, the holder being pivotable away from said latter position, upon an excess load being imposed upon the counterknife resting thereon.
  • the disintegrator as claimed in claim 3 including a link interconnecting the holder and the pivot axis for swinging the pivot axis awayv from therotor axis upon tilting of the holder.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Harvester Elements (AREA)
  • Threshing Machine Elements (AREA)
  • Knives (AREA)
US00081414A 1969-10-17 1970-10-16 Device in striking cutters Expired - Lifetime US3738584A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE14248/69A SE342540B (enrdf_load_stackoverflow) 1969-10-17 1969-10-17

Publications (1)

Publication Number Publication Date
US3738584A true US3738584A (en) 1973-06-12

Family

ID=20298788

Family Applications (1)

Application Number Title Priority Date Filing Date
US00081414A Expired - Lifetime US3738584A (en) 1969-10-17 1970-10-16 Device in striking cutters

Country Status (10)

Country Link
US (1) US3738584A (enrdf_load_stackoverflow)
CA (1) CA947185A (enrdf_load_stackoverflow)
DE (1) DE2050865C3 (enrdf_load_stackoverflow)
DK (1) DK135602B (enrdf_load_stackoverflow)
FI (1) FI55429C (enrdf_load_stackoverflow)
FR (1) FR2066117A5 (enrdf_load_stackoverflow)
GB (1) GB1304758A (enrdf_load_stackoverflow)
NO (1) NO125564B (enrdf_load_stackoverflow)
SE (1) SE342540B (enrdf_load_stackoverflow)
YU (1) YU33310B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934578A (en) * 1998-02-09 1999-08-10 Harper Industries, Inc. Rotary drum bale cutter with reprocessing chamber
WO2014179563A1 (en) * 2013-05-01 2014-11-06 Cnh Industrial America Llc Counter knife bank debris prevention
US10010028B1 (en) 2017-07-06 2018-07-03 Cnh Industrial America Llc Chopper assembly for a harvester with an automatic blade reset mechanism

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3243077A1 (de) * 1982-11-22 1984-05-24 Karl Mengele & Söhne Maschinenfabrik und Eisengießerei GmbH & Co, 8870 Günzburg Feld- bzw. pflueckhaecksler
DE9011121U1 (de) * 1990-07-27 1991-11-28 Mayr, Manfred, 8851 Tagmersheim Vorrichtung zum Zerkleinern von Stoffen, insbesondere zum Bröckeln von Tierfutter
US8920227B2 (en) * 2013-01-02 2014-12-30 Cnh Industrial America Llc Spring loaded counter knife bank assembly
CN112246365B (zh) * 2020-09-27 2022-04-19 农业农村部南京农业机械化研究所 一种介质表面间隔处理装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE289459C (enrdf_load_stackoverflow) *
US1867884A (en) * 1931-06-18 1932-07-19 American Lace Paper Company Web shearing apparatus
US2187801A (en) * 1938-01-05 1940-01-23 Brustowsky Morris Device for scraping the knives of slicing machines
US2810583A (en) * 1954-11-05 1957-10-22 Elofson Harry Readily attachable and detachable straw disintegrating and scattering device
US2858867A (en) * 1954-07-14 1958-11-04 Elofson Harry Stalk and straw disintegrating and scattering mechanism
US2865416A (en) * 1954-09-20 1958-12-23 Edgar E Hetteen Straw cutter
US3138185A (en) * 1960-12-27 1964-06-23 Frederick Joseph Straw conserving apparatus
US3256026A (en) * 1963-10-28 1966-06-14 Elofson Harry Readily detachable straw breaker and scatterer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE289459C (enrdf_load_stackoverflow) *
US1867884A (en) * 1931-06-18 1932-07-19 American Lace Paper Company Web shearing apparatus
US2187801A (en) * 1938-01-05 1940-01-23 Brustowsky Morris Device for scraping the knives of slicing machines
US2858867A (en) * 1954-07-14 1958-11-04 Elofson Harry Stalk and straw disintegrating and scattering mechanism
US2865416A (en) * 1954-09-20 1958-12-23 Edgar E Hetteen Straw cutter
US2810583A (en) * 1954-11-05 1957-10-22 Elofson Harry Readily attachable and detachable straw disintegrating and scattering device
US3138185A (en) * 1960-12-27 1964-06-23 Frederick Joseph Straw conserving apparatus
US3256026A (en) * 1963-10-28 1966-06-14 Elofson Harry Readily detachable straw breaker and scatterer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934578A (en) * 1998-02-09 1999-08-10 Harper Industries, Inc. Rotary drum bale cutter with reprocessing chamber
WO2014179563A1 (en) * 2013-05-01 2014-11-06 Cnh Industrial America Llc Counter knife bank debris prevention
US10010028B1 (en) 2017-07-06 2018-07-03 Cnh Industrial America Llc Chopper assembly for a harvester with an automatic blade reset mechanism

Also Published As

Publication number Publication date
DE2050865B2 (de) 1977-11-17
DK135602C (enrdf_load_stackoverflow) 1977-10-31
SE342540B (enrdf_load_stackoverflow) 1972-02-14
YU254470A (en) 1976-04-30
DK135602B (da) 1977-05-31
DE2050865C3 (de) 1978-07-06
NO125564B (enrdf_load_stackoverflow) 1972-10-02
YU33310B (en) 1976-10-31
FI55429C (fi) 1979-08-10
FI55429B (fi) 1979-04-30
FR2066117A5 (enrdf_load_stackoverflow) 1971-08-06
CA947185A (en) 1974-05-14
GB1304758A (enrdf_load_stackoverflow) 1973-01-31
DE2050865A1 (de) 1971-05-13

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