EP3789169A1 - Hache-bois - Google Patents

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Publication number
EP3789169A1
EP3789169A1 EP20193729.9A EP20193729A EP3789169A1 EP 3789169 A1 EP3789169 A1 EP 3789169A1 EP 20193729 A EP20193729 A EP 20193729A EP 3789169 A1 EP3789169 A1 EP 3789169A1
Authority
EP
European Patent Office
Prior art keywords
chopping machine
wood
coupling
holding element
drive shaft
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.)
Granted
Application number
EP20193729.9A
Other languages
German (de)
English (en)
Other versions
EP3789169B1 (fr
Inventor
Rudolf Eschlböck
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.)
Eschlbock - Maschinenbau GmbH
Original Assignee
Eschlbock - Maschinenbau GmbH
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 Eschlbock - Maschinenbau GmbH filed Critical Eschlbock - Maschinenbau GmbH
Publication of EP3789169A1 publication Critical patent/EP3789169A1/fr
Application granted granted Critical
Publication of EP3789169B1 publication Critical patent/EP3789169B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • 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
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/002—Transporting devices for wood or chips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/005—Tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • B02C2023/165—Screen denying egress of oversize material

Definitions

  • the present invention relates to a wood chopping machine with a chopping drum and at least one screen basket that can be displaced along an outer circumference of the chopping drum, the wood chopping machine having at least one drive with a drive shaft and at least one drive device for pivoting the screen basket out of or into its working position, as well as a method for pivoting a screen basket of a wood chopping machine that can be displaced along an outer circumference of a chopping drum from or into its working position, the wood chopping machine being driven by at least one drive with a drive shaft and a pivoting of the screen basket by a drive device different from the drive of the wood chopping machine from its or . is effected in its working position about its longitudinal axis.
  • Wood chopping machines have been known for a large number of years and are used to shred tree trunks and / or wood from bushes or green cuttings as quickly and comprehensively as possible.
  • the essential elements of such a wood chopping machine are the chopping rotor, on which a plurality of chopping knives, in particular on the circumference thereof, are arranged, and optionally a counter-cutting tool which interacts with these chopping knives and which is arranged on the housing of the wood chopping machine. If wood trunks or also the branches or trunks of the bushes are fed to such a wood chopping machine via a feed unit, these are chopped into chips or shavings in the wood chopping machine.
  • the length or size of the chips or chips produced with such a wood chopping machine depends on the one hand on the protrusion of the individual chopping knives and on the other hand on the feed speed of the wood into the wood chopping machine. It is obvious that with such an operation of a wood chopping machine it is necessary to get inside the machine at certain intervals, for example, to replace or sharpen the chopping knives or to check the knife head or to clean or maintain the machine. On the other hand, it goes without saying that the chips produced with the wood chopping machine are not of the same size but have a certain size distribution.
  • such wood chipping machines In order to ensure that the wood chips produced can be classified according to their size and to have safe and reliable access to the interior of the wood chopping machine, such wood chipping machines usually have sieve baskets with which on the one hand the wood chips can be classified into different sizes and on the other hand a clear view of the knives is guaranteed, and thus it can be recognized when access to the machine is required.
  • the housing of the machine To gain access to the inside of the wood chipper, the housing of the machine must be opened and a specialist must be able to access the inside of the machine.
  • This opening of the housing is carried out in a favorable manner by pivoting the screen basket extending over approximately half the circumference of the housing of the wood chopping machine.
  • the pivoting of such screen baskets which are formed from solid metal, has also been known for a number of years and the most diverse technical solutions for how such a displacement can be effected are described in the art.
  • a knife granulator in particular for grinding spices, has become known, which has a sieve ring in which a knife rotor is driven to rotate and, in addition, the sieve ring is also driven to rotate.
  • a device for sorting wood chips which has a drive unit with which the screen basket of the device can be displaced or opened and closed.
  • this drive unit which is different from the drive of the wood chipping machine, the screen basket is moved from its operating position to a removal or cleaning position and vice versa.
  • Such a device is relatively large and technically complex, since the drive for the screen basket is articulated on the outside of the screen basket and thus significantly increases the external dimensions of the machine.
  • the present invention now aims to provide a wood chopping machine, as is known in the prior art, in which it is possible to design the displacement device for the screen basket to be small and with the elements required for chopping wood or trunks to be combined in such a way that a device that is as simple and compact as possible can be made available.
  • the wood chopping machine is essentially characterized in that a fastening element of the strainer basket is fixed on a holding element that encompasses one end of the drive shaft of the wood chopping machine and is rotatably mounted relative to the drive shaft, that at least one in the holding element as well as in at least one in a coupling element which can be engaged is provided in an end face of the drive shaft which faces the holding element, and in that a drive device for the sieve basket that is different from the drive of the wood chopping machine is formed in the holding element.
  • a fastening element of the strainer basket is fixed on a holding element which encompasses one end of the drive shaft of the wood chipper and is rotatably mounted relative to the drive shaft, and at least one coupling element is provided which is formed both in the holding element and in at least one end face of the drive shaft facing the holding element
  • Recess can be coupled and finally a drive device for the screen basket that is different from the drive of the wood chopping machine is formed in the holding element, it is possible to cause the screen basket to pivot by coupling the coupling element in such a way that the drive device for the screen basket is coupled to the holding element, without a separate large-sized drive having to be arranged on the outside of the screen basket.
  • Such a device which cooperates in particular with a front end of the drive shaft of the wood chopping machine, is extremely small in size compared to conventional solutions and, moreover, does not increase the outer circumference of the wood chopping machine.
  • the drive device for the screen basket provided in the holding element can be made extremely small, since its only task is to pivot the screen basket into or out of the working position and only has to be used in the case of cleaning or maintenance of the wood chipper and here only has to be able to pivot the strainer basket by a maximum of 180 °, whereby the dimensions of the drive can be significantly reduced compared to conventional drives with which, for example, the strainer basket has to be lifted and displaced in its entirety.
  • the coupling element is formed from at least two coupling pins fixed in a guide plate and a coupling screw centrally penetrating both the guide plate and a cover of the holding element, it is possible to provide an extremely simple construction of a coupling which can be coupled into either the holding element or the drive shaft with the aid of pins.
  • the guide pins are fixed in a guide plate, in particular fixed immovably, they can be correctly positioned beforehand, in particular in the longitudinal direction of the drive shaft of the wood chipper, and the coupling process either by moving the guide plate and thus the pins in the direction of the axis of the drive shaft Chopping drum or in the direction away from the axis of the axis of the chopping drum.
  • the coupling element has three coupling pins arranged at the corners of an equilateral triangle, with which device a particularly stable and secure type of coupling can be achieved and in particular twisting of the pins during the pivoting of the screen basket, where one is not insignificant force is applied to the pins, can be avoided because the strainer basket has a not inconsiderable weight.
  • the invention is further developed in that for engagement of the coupling pins of the coupling element in the end face of the drive shaft there are blind holes and in the cover of the holding element Through holes are formed.
  • the coupling pins are inserted through these through-holes when the screen basket is to be pivoted, which enables the holding element to pivot relative to the drive shaft of the wood chopping machine and thus a pivoting of the strainer basket coupled to the holding element from its working position or into the maintenance position or back is achieved.
  • the displacement of the guide plate and the coupling pins is carried out according to a development of the invention by means of a coupling screw via a threaded connection.
  • a coupling screw via a threaded connection.
  • the drive device for the displacement of the screen basket is essentially designed so that it has at least one worm wheel and a worm, that the worm wheel can be acted upon to rotate about the coupling screw and that the coupling pins the cover for pivoting the screen basket the retaining plate are arranged penetrating.
  • a worm wheel is actuated by means of a worm and thus a maximum pivoting or rotation of 180 ° of the entire cover and thus the strainer basket fixed on the cover.
  • a particularly simple device is designed in such a way that the worm is designed to interact with an external toothing of the worm wheel and that the worm has a free end designed to interact with any drive device.
  • the worm is designed to interact with an external toothing of the worm wheel and also to interact with any drive device, in which case a hammer drill or an impact wrench, for example, can again be used as the drive device.
  • the coupling pins Due to the mounting of the worm wheel around the coupling screw, it is imperative that the coupling pins also penetrate the worm wheel, and according to a preferred development, they are held in the worm wheel so that they can rotate, but can be displaced in the axial direction.
  • the worm wheel can advantageously be designed or provided with a sleeve or thickening that is greater than the worm wheel thickness.
  • slide bearings are preferably provided between the holding element and the drive shaft of the wood chopping machine, which facilitate radial movement of the screen basket with respect to the axis of the drive shaft.
  • the sieve basket can also be formed from a plurality of at least partially mutually displaceable sieve surfaces, in particular displaceable mutually by manual actuation, which sieve surfaces must, however, only be fixed to a common fastening element in order to displace the sieve surfaces relative to one another, in particular not to fear during a pivoting or while the wood chipper is working.
  • the sieve surfaces must, however, only be fixed to a common fastening element in order to displace the sieve surfaces relative to one another, in particular not to fear during a pivoting or while the wood chipper is working.
  • two layers of sieve surfaces are arranged one above the other, that is, one above the other in the radial direction, they can have different or even the same mesh diameter and, for example, by shifting and fixing the sieve surfaces to one another, the size of the through-holes vary can.
  • the invention further relates to a method for pivoting a sieve basket of a wood chopping machine relative to the chopping drum, which method is essentially characterized in that a fastening element of the sieve basket is connected to a holding element that encompasses one end of the drive shaft of the wood chopping machine and is rotatably mounted relative to the drive shaft Holding element is pivoted with a drive device formed from a worm wheel rotatably mounted around a coupling screw and a worm, the coupling pins of a coupling element which penetrate the worm wheel and which are fixed to penetrate a guide plate are raised by rotation of a coupling screw into a position penetrating a cover of the holding element for pivoting the screen basket .
  • the method according to the invention can be used in such a way that when the wood chopping machine is in operation, the coupling is shifted, in particular by means of the coupling screw, so that the coupling pins are in engagement in the end face of the drive shaft of the wood chopping machine, whereby the coupling pins have been disengaged from the holding element for the screen basket and the screen basket cannot be pivoted while the wood chipper is working.
  • the screen basket For pivoting the screen basket is again, for example by means of a Impact drill, actuated a coupling screw freely rotatably mounted in a guide plate and brought the coupling pins out of engagement with the drive shaft of the wood chopping machine and brought into engagement with the holding element for the screen basket, whereupon by actuating the further drive device, in particular the worm and the worm wheel, for example again with a hammer drill, the screen basket can be pivoted from its working position into a maintenance position or back into the working position.
  • the further drive device in particular the worm and the worm wheel
  • Fig. 1 is shown schematically with 1 part of a wood chopping machine, the chopping drum from this wood chopping machine 1 is removed.
  • a pivotable screen basket 2 is provided along the outer circumference of the chopping drum (not shown), which screen basket 2 is arranged such that it can be pivoted about the longitudinal axis, in particular the drive shaft 3 of the wood chopping machine 1.
  • This screen basket 2 is here on an in Fig. 1 Holding element 4, not shown in its entirety, is set for its pivoting about drive shaft 3 of wood chopping machine 1.
  • the screen basket 2 is formed from a plurality of screen surfaces 5, wherein it is in the in Fig. 1
  • the embodiment shown is designed in at least two layers, the two superimposed layers having different widths of the passage elements or machine widths from one another.
  • the sieve surfaces 5 are arranged in a peripheral frame 6 and are also designed to strike a housing (not shown) of the wood chopping machine 1.
  • the holding element 4 here has a drive device 7 for moving the screen basket 2, which drive device 7 is formed from a worm wheel 8 and a worm 9, which worm 9 can be set in rotation, for example, with a hammer drill, not shown.
  • the worm wheel 8 and the worm 9 are covered by a cover 10 during operation, which is firmly connected in particular to a fastening element 11 for the screen basket 2 in order to ensure that the screen basket 2 rotates about the axis of the shaft 3 of the wood chopping machine 1.
  • the holding device 4 in particular the part of the holding device 4 required for driving the pivoting of the screen basket 2, is shown in FIG Fig. 2 and Fig. 3 shown in more detail.
  • the holding device 4 has a coupling element 12, which coupling element 12 consists of coupling pins 14 fixed in a guide plate 13, which coupling pins 14 together with the guide plate 13 by actuating the coupling screw 15, which is freely rotatably mounted, in particular, in the guide plate 13 in the direction of the arrow 16 can be raised or lowered.
  • the coupling element 12 is shown in its lowered position, in which the coupling pins 14 engage in blind holes 17 which are formed in an end face 18 of the drive shaft 3 of the wood chopping machine 1.
  • the coupling pins 14 do not engage in the through holes 19, which are formed in the cover 10 of the holding element 4, and the worm wheel 8 of the drive device 7 is activated when the wood chipper 1 is operated, ie when the drive shaft 3 is rotated rotated in such a way that a power transmission to the holding device 4 does not take place and thus a displacement or pivoting of the screen basket 2 of the wood chopping machine 1 is not possible and the screen basket 2 is held in its closed working position.
  • the worm wheel 8 of the drive device 7 is, as shown schematically in FIG Fig. 2 can be seen, rotated around a corresponding sleeve 20, which in turn is mounted in the cover 10 of the holding element 4.
  • the coupling screw 15 is set in rotation, for example with the aid of a hammer drill, and the guide plate 13, together with the coupling pins 14, is disengaged from the drive shaft 3 of the wood chopping machine 1 by pulling the coupling pins 14 out of the blind holes 17, which are formed in the end face 18 of the drive shaft 3, are brought, as shown in FIG Fig. 3 is shown.
  • the coupling pins 14 are pushed through the cover 10 of the holding device 4 and are now in engagement with the through holes 19 which are formed in the cover element 10. If now the worm wheel 8 of the separate drive device 7 with the aid of the in Fig.
  • Screw 9 is set in motion and in particular is pivoted through a maximum angle of 180 °, is due to the forced mounting of the coupling pins 14 in the through openings 19 in the cover 10 of the holding device 4, the holding device 4 is set in rotation according to the arrow 22 and the Sieve basket 2 pivoted from its operating position into an open position.
  • the connection of the screen basket 2 with the holding element 4 is here in the Fig. 2 and Fig. 3 Not shown. However, it must be such that the sieve basket 2 is forced to be carried along when the holding element 4 is pivoted.
  • the holding element 4 is arranged encompassing the drive shaft 3 of the wood chipper 1, as is the case Fig. 1 can be seen, wherein between the holding element 4 and the drive shaft 3 in particular slide bearings are provided in order to ensure a low-friction pivoting of the holding element 4 in relation to the drive shaft 3.
  • both the displacement of the coupling screw 15 and the drive of the worm 9 can be achieved with any commercially available, small-sized motor such as a drill or the like, since excessive driving force in this type of training is not required.
  • the displacement of the guide plate 13 with the aid of the coupling screw 15 can also be carried out manually, since this element is small and light.
  • the pivoting of the retaining element 4 with respect to the drive shaft 3 of the wood chopping machine 1 is also relatively easy due to the sliding bearings which are provided between the drive shaft 3 and the retaining element 4 and facilitate pivoting of the retaining element 4.
  • the entire device is significantly smaller than the devices known in the prior art and, in particular, does not enlarge the wood chopping machine 1 in the radial direction, but only slightly elongates the wood chopping machine 1 along the axial direction of the drive shaft 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Food Science & Technology (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
EP20193729.9A 2019-09-04 2020-08-31 Hache-bois Active EP3789169B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50773/2019A AT522947B1 (de) 2019-09-04 2019-09-04 Holzhackmaschine

Publications (2)

Publication Number Publication Date
EP3789169A1 true EP3789169A1 (fr) 2021-03-10
EP3789169B1 EP3789169B1 (fr) 2022-04-27

Family

ID=72292447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20193729.9A Active EP3789169B1 (fr) 2019-09-04 2020-08-31 Hache-bois

Country Status (2)

Country Link
EP (1) EP3789169B1 (fr)
AT (1) AT522947B1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10125923A1 (de) * 2001-05-21 2002-12-05 Pallmann Kg Maschf Verfahren, Anordnung und Magazin zum selbsttätigen Auswechseln der Messereinheiten eines Messerrings eines Messerringzerspaners
DE102005029899A1 (de) 2005-06-25 2007-01-04 Gotic Gmbh Messerschneidmühle
US20080099591A1 (en) 2006-10-26 2008-05-01 Allegheny Paper Shredders Corp. Adjustable screen for material destruction apparatus
EP2058097A2 (fr) 2007-11-09 2009-05-13 KOMPTECH GmbH Machine à déchiqueter
EP2708340A1 (fr) 2012-09-13 2014-03-19 HoGHa GmbH Dispositif de tri pour des copeaux de bois
DE202016001917U1 (de) * 2016-03-24 2017-05-26 B. Maier Zerkleinerungstechnik Gmbh Zerkleinerungsmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10125923A1 (de) * 2001-05-21 2002-12-05 Pallmann Kg Maschf Verfahren, Anordnung und Magazin zum selbsttätigen Auswechseln der Messereinheiten eines Messerrings eines Messerringzerspaners
DE102005029899A1 (de) 2005-06-25 2007-01-04 Gotic Gmbh Messerschneidmühle
US20080099591A1 (en) 2006-10-26 2008-05-01 Allegheny Paper Shredders Corp. Adjustable screen for material destruction apparatus
EP2058097A2 (fr) 2007-11-09 2009-05-13 KOMPTECH GmbH Machine à déchiqueter
EP2708340A1 (fr) 2012-09-13 2014-03-19 HoGHa GmbH Dispositif de tri pour des copeaux de bois
DE202016001917U1 (de) * 2016-03-24 2017-05-26 B. Maier Zerkleinerungstechnik Gmbh Zerkleinerungsmaschine

Also Published As

Publication number Publication date
EP3789169B1 (fr) 2022-04-27
AT522947A1 (de) 2021-03-15
AT522947B1 (de) 2022-10-15

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