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EP0386699B1 - Driving mechanism for a paper shredder - Google Patents

Driving mechanism for a paper shredder Download PDF

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Publication number
EP0386699B1
EP0386699B1 EP90104269A EP90104269A EP0386699B1 EP 0386699 B1 EP0386699 B1 EP 0386699B1 EP 90104269 A EP90104269 A EP 90104269A EP 90104269 A EP90104269 A EP 90104269A EP 0386699 B1 EP0386699 B1 EP 0386699B1
Authority
EP
European Patent Office
Prior art keywords
drive
gear
reduction gear
mirror image
pin
Prior art date
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
Application number
EP90104269A
Other languages
German (de)
French (fr)
Other versions
EP0386699A3 (en
EP0386699A2 (en
Inventor
Hermann Schwelling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0386699A2 publication Critical patent/EP0386699A2/en
Publication of EP0386699A3 publication Critical patent/EP0386699A3/en
Application granted granted Critical
Publication of EP0386699B1 publication Critical patent/EP0386699B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0007—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/24—Drives

Definitions

  • the invention relates to a drive device for the knife rollers of a document shredder, consisting of an electric motor with a reduction gear and a so-called overrunning clutch in the form of a driving pin at one end of one of the shafts of the knife rollers, in the plane of rotation of which on the same shaft end seated drive wheel a stop with two stop surfaces is provided.
  • such a document shredder drive equipped with an overrunning clutch is known specifically from the generic DE-B-16 11 752 and is used primarily for malfunctions due to blockages or Jamming of clippings, for the free running of the knife rollers in the reverse gear and the restart in the forward gear under load, always to have sufficient torque available.
  • the known reduction gear made up of toothed belts and corresponding pulleys, has a pin located at the end of one of the knife roller shafts, which cooperates with a stop with two stop faces attached in its plane of rotation to the associated pulley.
  • Such an overrunning clutch may work quite satisfactorily with reduction gears equipped with toothed belts, but not with those that essentially consist of gear wheels, especially when it comes to inexpensive plastic wheels that are used more and more in mass production today.
  • the object of the present invention is therefore also to construct means and measures to be provided which definitely exclude the aforementioned risk of tipping.
  • the knife rollers 11 are, for example, via ball bearings 17 in the Mounted side parts 1, which together with the bottom 2 and the cross struts 4 form the frame of the document shredder drive.
  • the electric drive motor 5 in the form of a reversing motor and a bearing plate 3 for holding a toothed wheel 7, which meshes with the drive pinion 6 of the motor 5, are seated on the side part 1 shown.
  • the actual overrunning clutch now consists in the fact that the two flat sides 9a and 9b of the intermediate wheel 9 have recesses 14 in the hub region and these stop surfaces 15 and 16 delimiting them on both sides, and the drive shaft extension 12a of the associated cutter roller shaft 12 has driving pins 13 which are associated with the recesses 14 and stop surfaces 15 and 16 correspond.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruchs 1 auf eine Antriebsvorrichtung für die Messerwalzen eines Aktenvernichters, bestehend aus einem Elektromotor mit Untersetzungsgetriebe und einer sog. Überholkupplung in Form eines Mitnehmerstiftes an einem Ende einer der Wellen der Messerwalzen, in dessen Drehebene an dem auf dem gleichen Wellenende sitzenden Antriebsrad ein Anschlag mit zwei Anschlagflächen vorgesehen ist.According to the preamble of claim 1, the invention relates to a drive device for the knife rollers of a document shredder, consisting of an electric motor with a reduction gear and a so-called overrunning clutch in the form of a driving pin at one end of one of the shafts of the knife rollers, in the plane of rotation of which on the same shaft end seated drive wheel a stop with two stop surfaces is provided.

Neben mit konzentrisch angeordneten Aussparungen gemäß der DE-C-924 507 versehenen Sperrscheibenkupplungen allgemeiner Art ist ein derartiger, mit einer Überholkupplung ausgerüsteter Aktenvernichterantrieb speziell aus der gattungsbildenden DE-B-16 11 752 bekannt und dient hierbei vor allem dazu, bei Betriebsstörungen durch Verstopfungen oder Verklemmungen von Schnittgut, für das Freilaufen der Messerwalzen im Rückwärtsgang sowie das Wiederanlaufen im Vorwärtsgang unter Last, stets ein ausreichendes Drehmoment zur Verfügung zu haben. Das bekannte, aus Zahnriemen und entspr. Riemenscheiben aufgebaute Untersetzungsgetriebe weist zu diesem Zweck einen am Ende einer der Messerwalzenwellen sitzenden Stift auf, der mit einem in seiner Drehebene an der zugeordneten Riemenscheibe befestigten Anschlag mit zwei Anschlagflächen zusammenwirkt. Eine derartige Überholkupplung mag zwar durchaus zufriedenstellend bei mit Zahnriemen bestückten Untersetzungsgetrieben arbeiten, nicht jedoch bei solchen, die im wesentlichen aus Zahnrädern bestehen, zumal wenn es sich noch um preiswerte Räder aus Kunststoff handelt, die heute mehr und mehr bei Großserienfertigung Verwendung finden. Hier nämlich würde die aus der unsymmetrischen Belastung durch den Kupplungsstift zwangsläufig resultierende Kippung des betreffenden Zahnrades gegenüber dem zugeordneten Ritzel zu punktförmigen Belastungen der Zähne und deren erhöhtem Verschleiß, wenn nicht sogar deren Zerstörung führen.In addition to locking disc clutches of a general type provided with concentrically arranged cutouts in accordance with DE-C-924 507, such a document shredder drive equipped with an overrunning clutch is known specifically from the generic DE-B-16 11 752 and is used primarily for malfunctions due to blockages or Jamming of clippings, for the free running of the knife rollers in the reverse gear and the restart in the forward gear under load, always to have sufficient torque available. For this purpose, the known reduction gear, made up of toothed belts and corresponding pulleys, has a pin located at the end of one of the knife roller shafts, which cooperates with a stop with two stop faces attached in its plane of rotation to the associated pulley. Such an overrunning clutch may work quite satisfactorily with reduction gears equipped with toothed belts, but not with those that essentially consist of gear wheels, especially when it comes to inexpensive plastic wheels that are used more and more in mass production today. Here, namely, the inevitable result of the asymmetrical loading of the coupling pin tilting of the gear in question relative to the associated pinion to point loads on the teeth and their increased wear, if not even their destruction.

Die Aufgabe der vorliegenden Erfindung besteht deshalb auch darin, bauliche Mittel und Maßnahmen vorzusehen, die die zuvor erwähnte Gefahr einer Kippung mit Sicherheit ausschließen.The object of the present invention is therefore also to construct means and measures to be provided which definitely exclude the aforementioned risk of tipping.

Gelöst wird diese Aufgabe dabei durch die im einzigen Patentanspruch niedergelegte Bauform, die im folgenden anhand eines zeichnerischen Ausführungsbeispiels noch näher erläutert ist. Es zeigen

Fig. 1
eine Teilansicht auf das Getriebe, das die Motorantriebswelle mit den Messerwalzen verbindet,
Fig. 2
eine Draufsicht dazu mit abgenommenem Gehäusedeckel und
Fig. 3
das Kupplungsrad im Lösungsschnitt.
This object is achieved by the design laid down in the single patent claim, which is explained in more detail below with the aid of a drawing exemplary embodiment. Show it
Fig. 1
a partial view of the gearbox that connects the motor drive shaft with the knife rollers,
Fig. 2
a plan view of this with the housing cover removed and
Fig. 3
the clutch wheel in solution cut.

Bei der dargestellten Ausführungsform sind die Messerwalzen 11 z.B. über Kugellager 17 in den Seitenteilen 1 gelagert, die zusammen mit dem Boden 2 und den Querstreben 4 den Gestellrahmen des Aktenvernichterantriebs bilden. An dem dargestellten Seitenteil 1 sitzt zudem der elektrische Antriebsmotor 5 in Form eines Reversiermotors und ein Lagerschild 3 zur Halterung eines Zahnrades 7, das mit dem Antriebsritzel 6 des Motors 5 kämmt. Ein mit dem Zahnrad 7 drehfest verbundenes Zwischenritzel 8 steht seinerseits mit einem lose auf der zapfenartigen Verlängerung 12a einer der Messerwalzenwellen 12 sitzenden Zwischenrad 9 in Verbindung und vervollständigt somit das Untersetzungsgetriebe für die über das Räderpaar 10 in gegenläufiger Antriebsverbindung stehenden Messerwalzen.In the embodiment shown, the knife rollers 11 are, for example, via ball bearings 17 in the Mounted side parts 1, which together with the bottom 2 and the cross struts 4 form the frame of the document shredder drive. In addition, the electric drive motor 5 in the form of a reversing motor and a bearing plate 3 for holding a toothed wheel 7, which meshes with the drive pinion 6 of the motor 5, are seated on the side part 1 shown. An intermediate pinion 8, which is connected in a rotationally fixed manner to the gearwheel 7, is in turn connected to an intermediate wheel 9 which is loosely seated on the pin-like extension 12a of one of the knife roller shafts 12 and thus completes the reduction gear for the knife rollers which are in opposite drive connection via the pair of wheels 10.

Die eigentliche Überholkupplung besteht nun darin, daß die beiden Planseiten 9a und 9b des Zwischenrades 9 im Nabenbereich Aussparungen 14 und diese beidseits begrenzenden Anschlagflächen 15 und 16 aufweisen und die Antriebswellenverlängerung 12a der zugehörigen Messerwalzenwelle 12 zugeordnete Mitnehmerstifte 13 aufweist, die mit den Aussparungen 14 und Anschlagflächen 15 und 16 korrespondieren.The actual overrunning clutch now consists in the fact that the two flat sides 9a and 9b of the intermediate wheel 9 have recesses 14 in the hub region and these stop surfaces 15 and 16 delimiting them on both sides, and the drive shaft extension 12a of the associated cutter roller shaft 12 has driving pins 13 which are associated with the recesses 14 and stop surfaces 15 and 16 correspond.

Die Funktionsweise dieser Vorrichtung ist nun folgende:
Kommt der Motor 5 z.B. durch irgend eine Verstopfung der Messerwalzen 11 in bekannter Weise zum Stillstand, wird der Motorrücklauf eingeschaltet. Die zuvor beispielsweise an den Anschlagflächen 15 anliegenden Mitnehmerstifte 13 laufen dann durch den Freiraum der Aussparungen 14 zurück und der Motor erreicht wieder sein volles Drehmoment, ehe die Stifte 13 an die Flächen 16 anschlagen und somit zumeist die Verstopfung sofort lösen. Die beste Wirkung wird bei dieser neuen Bauform noch durch zusätzliche, rotationssymmetrische Anordnung der Kupplungsglieder 13 bis 16 auf beiden Planseiten 9a und 9b des betreffenden Zahnrads 9 erreicht.The operation of this device is now as follows:
If the motor 5 comes to a standstill, for example due to any blockage of the knife rollers 11, the motor return is switched on. The driver pins 13, which previously rested, for example, on the stop surfaces 15, then run back through the free space of the cutouts 14 and the motor reaches its full torque again before the pins 13 strike the surfaces 16 and thus usually immediately solve the blockage. The best effect is achieved in this new design by additional, rotationally symmetrical arrangement of the coupling members 13 to 16 on both plan sides 9a and 9b of the gear 9 in question.

BezugsziffernverzeichnisReference number index

11
Gestell-SeitenteilFrame side part
22nd
GestellbodenRack base
33rd
LagerschildEnd shield
44th
QuerstrebenCross struts
55
AntriebsmotorDrive motor
66
AntriebsritzelDrive pinion
77
Zahnradgear
88th
ZwischenteilIntermediate part
99
ZwischenradIdler gear
9a9a
PlanseitePlan page
9b9b
PlanseitePlan page
1010th
SchneidwalzenantriebszahnradCutting roller drive gear
1111
MesserwalzeKnife roller
1212th
MesserwalzenwelleKnife roller shaft
12a12a
WellenverlängerungShaft extension
1313
MitnehmerstiftDriver pin
13a13a
Bohrung zur StiftaufnahmeHole for the pin holder
1414
AussparungRecess
1515
AnschlagflächeAbutment surface
1616
AnschlagflächeAbutment surface
1717th
Kugellagerball-bearing
1818th
Nabehub

Claims (1)

  1. Drive for the cutting rollers (11) of a shredding machine, consting of an electric motor (5) with a reduction gear (5, 7, 8, 9, 10) and an overriding clutch in the form of a coupling through pin (13) at an end of one of the shafts (12) of the cutting rollers (11), in the plane or rotation of which pin an abutment with two abutment surfaces (15 and 16) is provided at the drive gear (9) seated on the same shaft end (12a), characterised thereby that at least the members, which carry the overriding clutch (13 to 16), of the reduction gear (6 to 10) are constructed as a toothed wheel gear and the clutch members (13 to 16) are arranged in mirror image on both sides (9a and 9b) of the associated toothed wheel (9), wherein the two face sides (9a and 9b) of the intermediate gearwheel (9) of the reduction gear (6 to 10) have in the region of the hub (18) recesses (14), which are disposed in mirror image relative to the gearwheel centre plane, and abutment surfaces (15 and 16) bounding these at both ends, and the drive shaft extension (12a), which projects at the front end out of the hub (18), of the associated cutting roller shaft (12) has coupling through pins (13), which are similarly arranged in mirror image to the intermediate gearwheel (9) and which run in the recesses (14) provided with the abutment surfaces (15 and 16).
EP90104269A 1989-03-07 1990-03-06 Driving mechanism for a paper shredder Expired - Lifetime EP0386699B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907316 1989-03-07
DE3907316A DE3907316A1 (en) 1989-03-07 1989-03-07 DRIVE FOR THE KNIFE ROLLERS OF A SHREDDER

Publications (3)

Publication Number Publication Date
EP0386699A2 EP0386699A2 (en) 1990-09-12
EP0386699A3 EP0386699A3 (en) 1991-10-30
EP0386699B1 true EP0386699B1 (en) 1994-01-26

Family

ID=6375731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104269A Expired - Lifetime EP0386699B1 (en) 1989-03-07 1990-03-06 Driving mechanism for a paper shredder

Country Status (3)

Country Link
US (1) US5014920A (en)
EP (1) EP0386699B1 (en)
DE (2) DE3907316A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW456270U (en) * 1999-06-04 2001-09-21 Tsai Shau Nung Safety device for paper flipping of shredder
CN102514029B (en) * 2012-01-16 2015-05-27 林志宪 A chain cutter case device for cut paper for in paper laminating machine
DE102012100681B4 (en) 2012-01-27 2022-09-01 Hermann Schwelling Document shredder with turbo function
EP3050627B1 (en) * 2015-02-02 2018-08-22 Flender GmbH Drive arrangement, working machine having one or more of such drive arrangements and method for operating such a drive arrangement
CN106269130A (en) * 2016-08-30 2017-01-04 浙江鲨鱼食品机械有限公司 A kind of Multifunctional meat chopper

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE924507C (en) * 1952-06-28 1955-03-03 Pee Wee Maschinen Und Appbau I Device for feeding workpieces in machine tools having two tool rolls, in particular thread rolling machines
DE1453728A1 (en) * 1964-04-06 1969-05-08 Bueche Dr Ernst Centrifugal pump for heating
DE1611752B1 (en) * 1966-02-11 1972-05-31 Schleicher Co Feinwerktech Drive for the knife rollers of a device for cutting up documents
GB1190635A (en) * 1967-08-24 1970-05-06 Prvni Brnenska Strojirna Zd Y Improvements in or relating to Turbines.
US3703970A (en) * 1971-02-23 1972-11-28 Benson Ind Ltd Apparatus for treating waste material
US4026480A (en) * 1974-04-17 1977-05-31 Hobart Corporation Jam breaking method for comminuting device
US4034918A (en) * 1975-08-06 1977-07-12 Saturn Manufacturing, Inc. Drive arrangement for rotary shredding apparatus
DE2748619C3 (en) * 1977-10-29 1981-02-12 Feinwerktechnik Schleicher & Co, 7778 Markdorf Cutting mechanism of a device for shredding documents
GB2096919B (en) * 1981-03-11 1984-12-05 Matsushita Electric Ind Co Ltd Shredder
US4793561A (en) * 1982-05-24 1988-12-27 Mac Corporation Of America Speed-responsive reversing hydraulic drive for rotary shredder
US4609155A (en) * 1985-04-09 1986-09-02 Shredding Systems, Inc. Shredding apparatus including overload protection of drive line
US4721257A (en) * 1986-12-04 1988-01-26 Williams Patent Crusher And Pulverizer Company Rotary shredding apparatus
GB2215235B (en) * 1988-02-25 1992-02-05 Ofrex Group Holdings Plc Improvements relating to shredding machines

Also Published As

Publication number Publication date
DE3907316C2 (en) 1992-03-12
US5014920A (en) 1991-05-14
DE59004373D1 (en) 1994-03-10
EP0386699A3 (en) 1991-10-30
EP0386699A2 (en) 1990-09-12
DE3907316A1 (en) 1990-09-13

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