WO2023001663A1 - Dispositif transporteur à vis ayant une broche amovible, et hachoir équipé de celui-ci - Google Patents

Dispositif transporteur à vis ayant une broche amovible, et hachoir équipé de celui-ci Download PDF

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Publication number
WO2023001663A1
WO2023001663A1 PCT/EP2022/069621 EP2022069621W WO2023001663A1 WO 2023001663 A1 WO2023001663 A1 WO 2023001663A1 EP 2022069621 W EP2022069621 W EP 2022069621W WO 2023001663 A1 WO2023001663 A1 WO 2023001663A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyor device
screw
screw conveyor
sealing ring
connection
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.)
Ceased
Application number
PCT/EP2022/069621
Other languages
German (de)
English (en)
Inventor
Volker Lauber
Adrian Csökör
Samuel MÜLLER-SPÄTH
Andre WEYAND
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.)
Kutter- und Geratebau Wetter GmbH
Original Assignee
Kutter- und Geratebau Wetter 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
Priority claimed from DE102021119200.5A external-priority patent/DE102021119200B4/de
Priority claimed from DE202021103953.1U external-priority patent/DE202021103953U1/de
Application filed by Kutter- und Geratebau Wetter GmbH filed Critical Kutter- und Geratebau Wetter GmbH
Publication of WO2023001663A1 publication Critical patent/WO2023001663A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B02C18/30—Mincing machines with perforated discs and feeding worms
    • B02C18/305—Details

Definitions

  • Screw conveyor device with detachable trunnion and meat grinder herewith
  • the invention relates to an auger device according to the preamble of claim 1 and a meat grinder herewith according to claim 15.
  • Meat grinders have the task of grinding different sized pieces of a product into particles of a defined size.
  • the processed material is usually meat intended for human or animal consumption, but vegetarian foods are also increasingly being processed.
  • Raw materials for confectionery or non-edible products from different industries are also ground with a meat grinder.
  • a core element of a meat grinder is the screw conveyor, with which the processed material is transported to the shredding device. It is known that a separate pin is non-rotatably connected at one end to a screw element of the screw conveyor. Starting from the point of connection with the screw element, the journal has an axially extending support section on which knives are mounted in a rotationally fixed manner and consequently rotate with the screw element. A perforated disc mounted opposite the knives can are stationarily supported on the meat grinder housing and have a central hub through which the pin passes.
  • the detachable connection of DE 2649305 C3 is a screw connection in which the pin has an externally threaded section which is screwed into an internal thread in the worm element.
  • the disadvantage of this is that after a long period of use, the connection can only be loosened with difficulty or not at all. The application of high torques when loosening the screw connection can lead to damage to the components.
  • reverse running of the auger is not possible or only possible to a limited extent.
  • Another disadvantage is that there is a gap at the junction between the trunnion and the scroll element. This gap can be minimized by a suitable choice of tolerances, but still represents a habitat for microorganisms.
  • metallic contact surfaces are generally to be regarded as leaky.
  • the typical material to be processed by a meat grinder naturally contains microorganisms which, in connection with material residues, find a suitable habitat in the smallest gaps or spaces between contact surfaces.
  • the massive proliferation of microorganisms which can take place within a short period of time under favorable conditions, poses a risk for the processed goods and in particular for the consumer of the same. Pathogenic germs are highly undesirable in food processing.
  • DE 202020105051 U1 and DE 202020105052 U1 disclose two further methods for fastening and sealing a pin on a screw element.
  • the trunnion Due to the high forces during the crushing process, the trunnion is also exposed to elastic deformations relative to the screw element, which appear as micro-movements in the radial direction and torsional movements. This can loosen the screw connection of the fastening ring.
  • the fastening ring and the sealing rings are also exposed to these relative movements and can hardly withstand them.
  • the relatively small sealing ring cross-sections have to absorb the movements and wear out.
  • DE 202020105052 U1 describes a somewhat differently designed fastening ring which has a flange arranged on the outside.
  • the flange has notches on the circumference where a tool can be attached.
  • right-angled inner angles arise during assembly, which are difficult to clean. Microorganisms can settle there and also in the fastening ring up to the sealing rings.
  • the object of this invention is to form the connection between a trunnion and screw element in a process-reliable manner without settlement space for microorganisms. Replacing the pin and then restoring the process-reliable connection without using special tools is another task.
  • the replacement of the pin should be simplified compared to the known solutions, so that it can be done worldwide by a competent person with usually in can be carried out with the standard tools available in every workshop and without special knowledge.
  • the invention relates to a screw conveyor device for a meat grinder, with a screw element which has a connection with a pin that is fitted into one another axially at a first end, the connection forming a rotationally fixed form fit and an annular gap being formed at the outer end of the connection, with an axial securing device between the trunnion and the worm element is provided, with a sealing ring being pressed into an installation space formed by the annular gap, the installation space directly adjoining an end face of the worm element and/or the trunnion.
  • the sealing ring seals the annular gap, in particular directly on the outside. A living space for microorganisms is avoided up to the outside. Because the pressed-in sealing ring is not located behind a fastening screw ring, it can also have a greater material thickness than internal O-rings. Larger radial material thicknesses of the sealing body compared to the known solutions are able
  • the screw element can, for example, consist of cast stainless steel, 3D printing, a welded construction made of stainless steel parts or plastic.
  • the pin is preferably made of steel, in particular stainless steel or tempered steel.
  • the sealing ring is seated on a portion of the spigot that has no indentation. This means that there is no notch effect on the trunnion, but rather the sealing ring encloses it at the point where it enters the screw element, which is critical for fracture.
  • the axial lock should not be formed by the sealing ring. This means that no holding forces act on the sealing ring, which in particular could limit the sealing performance. Theoretically, however, it is also possible to functionally integrate the axial lock into the sealing ring.
  • the rear end of the sealing ring forms a surface that is flush with the end face or faces. This allows correct installation and the sealing effect to be checked after assembly and during the service life by means of a simple visual inspection. In addition, there are no inside corners at the transition in which microorganisms could settle. Instead, the sealed sealing gap extends to the flush surface. The whole The sealing area can thus do without cavities or edges in order to provide no living space for microorganisms and to ensure residue-free cleaning. Another reason for a flush finish is a minimum distance between the screw element and a perforated disc or knife that is optionally positioned in front of it.
  • the sealing ring is arranged on a collar which, in particular, forms part of the flush surface.
  • the federal government can in particular be part of the pin. It contributes to the fact that a smooth surface can initially be provided for cleaning, especially in the area of the parts transition to the sealing ring. Away from the part transition, the collar can then transition into other surface orientations with radii that can be hygienically cleaned, preferably greater than 3 mm.
  • the sealing ring is preferably rotationally symmetrical. This form is inexpensive to produce and allows for simple and process-reliable assembly. A non-rotationally symmetrical shape is nevertheless conceivable and can be produced, at least for special cases, with properties comparable to those of the rotationally symmetrical design.
  • the sealing ring has a locking geometry on its inside and/or outside, which engages in a locking geometry in the annular gap.
  • the sealing ring thus sits reliably in the intended location, even under load.
  • the locking geometry of the sealing ring has at least one barb which engages in a locking recess which is formed by the locking geometry in the annular gap. This allows easy assembly with haptic feedback about the correct fit.
  • the latching geometry in the annular gap can be formed on the pin and/or the worm element.
  • the sealing ring has a groove at its front end, which—if provided—is formed in particular in the area of the optional latching geometry. This makes it easier for the sealing ring to be radially compressed at the front end and thus inserted into the installation space.
  • the sealing ring is optionally designed to be elastic or consists of an elastic material, for example plastic or rubber. Furthermore, a design is possible according to which the sealing ring is compressed when it is pressed in and relaxes at least partially in the end position.
  • the sealing ring has a sealing body and a reinforcement ring, the reinforcement ring being made of a stronger material than the sealing body and being inserted and/or pressed into a groove formed in the sealing body at the rear end of the sealing ring.
  • the reinforcement ring can thus support a softer material from the inside.
  • the reinforcement ring should form a flush surface with the seal body. A hygienic surface is thus achieved.
  • the sealing body should be made of an elastic material, for example a plastic or rubber, and the reinforcement ring should be made of a stronger material, for example steel, stainless steel or a hard plastic.
  • the reinforcement ring can have a locking geometry on its inside and/or outside, e.g. a barb, which engages in a locking geometry in the groove of the sealing body. The reinforcement ring is thus secured in position. To remove it, you can, for example, penetrate the sealing body with a screwdriver and lever out the reinforcement ring.
  • the sealing ring can only be removed by damaging it, for example by drilling a hole in the sealing ring and then reaching behind the sealing ring with a tool through the hole or levering it. This forces the replacement of the sealing ring during maintenance. In contrast to a line seal with liquid leakage, one does not immediately see a microorganism hotspot in the present sealing situation.
  • the axial securing is formed by a threaded connection between the journal and the screw element or by a securing element from the group of cylinder pins, grub screws and threaded pins. The latter should then protrude through the screw element into the trunnion or protrude completely through the trunnion.
  • the axial lock has a fastening element in the annular gap.
  • the fastening element is preferably a locking ring.
  • the fastening element or the circlip is preferably a grooved ring, an internal circlip (also known as a Seeger ring), a snap ring or spiral ring, with a circlip groove being formed in particular in the annular gap, particularly preferably at a distance from the installation space of the sealing ring.
  • a grooved ring or an internal circlip takes up little space and forms an almost 360 degree stop, and circlip pliers for its assembly are part of every well-stocked workshop. Alternatively, the assembly can be done with standard needle nose pliers.
  • the annular gap should serve in particular as a mounting space for the fastening element.
  • the sealing ring is arranged at a distance from the fastening element. Any load movements of the fastening element do not have a direct effect on the sealing ring, which seals more reliably as a result.
  • At least one blade is arranged on the pin, preferably fixed in a form-fitting manner.
  • the pin can form a blade pin on which the blade is mounted with a blade hub.
  • a further development of the screw conveyor device can consist in the knife being arranged opposite a perforated disk.
  • the material to be processed conveyed with the screw element is then cut with the knife and finally pressed through the perforated disc.
  • the pin is preferably rotatably mounted in a hub of the perforated disk, with the perforated disk optionally being mounted in a rotationally fixed manner.
  • the knife is thus mounted very tightly between the worm element and the perforated disc and is subject to minimal wear with a high-quality cutting result.
  • connection is designed in such a way that the pin protrudes into the screw element.
  • the winding of the screw element can thus project particularly close to the blade.
  • the positive connection is formed by a polygonal geometry, a polygonal connection, a multi-tooth connection or a screw connection.
  • Screw connections are easy to produce and are particularly suitable for less stressed applications, a polygonal geometry and also polygonal connections can transmit larger forces at slightly higher costs, and multi-tooth connections are suitable for particularly large transmission forces.
  • the polygonal geometry can be a square, for example.
  • the trunnion optionally has a shoulder or collar that abuts axially against the scroll element. This means that the pin and the worm element are held in a defined position axially relative to one another.
  • the paragraph is preferably in the annular gap, and here particularly preferably deeper than the installation space.
  • the scroll element should have a scroll core around which a scroll thread winds.
  • the annular gap is then preferably formed adjacent to the screw core.
  • the invention also relates to a meat grinder with a screw conveyor device as described above and below, wherein the screw conveyor device is arranged in a screw housing and driven by a conveyor drive, with a receiving hopper opening into the screw housing, and wherein the
  • Screw conveyor device is designed to promote material to be processed from the receiving hopper to a rotating knife.
  • the knife is the one described above, which is arranged to rotate with the pivot.
  • the meat grinder can be easily and inexpensively serviced due to the detachable trunnion by individually replacing the trunnion and auger element. In addition, easy cleaning is possible and there is no living space for microorganisms in the connection between the trunnion and the screw element. This means that food in particular can be processed hygienically.
  • FIG. 1 shows a longitudinal section through a mounted screw conveyor device with a pressed-in sealing ring
  • Figure 2 is a perspective view of the assembled auger assembly of Figure 1;
  • Figure 3 is an exploded view of the auger assembly of Figures 1 and 2;
  • FIG. 4 shows a longitudinal section through a mounted screw conveyor device with a pressed-in but slightly different sealing ring
  • FIG. 5 is an exploded view of the auger assembly of Figure 4; and FIG. 6 shows an exploded view of a screw conveyor device with blade and perforated disk.
  • Fig. 1 shows a longitudinal section through a mounted screw conveyor device 1 for a meat grinder.
  • This screw conveyor device 1 comprises a screw member 10 having a screw core 12 and a screw thread 13 winding around the screw core 12 .
  • the screw element 10 can consist, for example, of cast stainless steel, 3D printing, a welded construction made of stainless steel parts or of plastic.
  • an axially nested connection 30 with a pin 20 is formed, the pin 20 protruding into the screw element 10, namely its screw core 12.
  • the pin 20 is preferably made of steel, in particular high-grade steel, or heat-treated steel.
  • connection 30 forms a rotationally fixed form fit 31.
  • the latter can be formed by a polygonal geometry, for example a square, a polygonal connection, a multi-tooth connection or a screw connection. This is completely inside the connection 30 or inside the screw element 10.
  • an axial lock 40 is formed between the journal 20 and the screw element 10 .
  • the pin 20 has a shoulder or collar 26 which abuts the screw element 10 axially.
  • the shoulder or collar 26 is secured against being pulled out axially with a fastening element 41 .
  • the fastening element 41 is a locking ring, in particular an internal locking ring, which sits in a locking ring groove 42 in the wall of the screw element 10 .
  • annular gap 32 is formed between the pin 20 and the screw element 10.
  • the retaining ring groove 42 is also formed in this annular gap 32 and the annular gap 32 serves as a mounting space for the fastening element 41 or the inner retaining ring.
  • the annular gap 32 forms an installation space 33 for a rotationally symmetrical sealing ring 50 .
  • the sealing ring 50 is pressed into the installation space 33 and seals the annular gap 32 .
  • the installation space 33 is directly adjacent to end faces 11 , 21 of the screw element 10 and the journal 20 .
  • the sealing ring 50 forms a flush surface A with the end faces 11 , 21 at its rear end 54 .
  • the sealing ring 50 is arranged on a collar 28 of the journal 20, which forms a part of the flush surface A, namely the end face 21 of the journal 20.
  • the sealing ring 50 has a locking geometry 55 on its inside 51 and outside 52 which engages in a locking geometry 34 in the annular gap 32 .
  • the locking geometry 55 of the sealing ring 50 is formed in particular by barbs, which engages in a latching recess which is formed by the latching geometry 34 in the annular gap 32.
  • the latching geometry 34 in the annular gap 32 includes, on the one hand, partial geometries 29 on the pin 20 and partial geometries 14 on the screw element 11, in each of which the sealing ring 50 engages.
  • the sealing ring 50 has a groove 57, which is located in particular in the area of the latching geometry 55, as a result of which the latching geometry 55 of the sealing ring 50 can spring slightly inwards during assembly.
  • the sealing ring 50 is elastic or consists entirely of an elastic material such as plastic or rubber.
  • the sealing ring 50 When pressed in, the sealing ring 50 is compressed and then relaxes partially into the end position shown. In this case, the sealing ring 50 preferably remains arranged at a distance from the fastening element 41 .
  • FIG. 2 shows a perspective view of the assembled screw conveyor device 1 according to FIG. 1
  • FIG. 3 shows an exploded view of the screw conveyor device according to FIGS. 1 and 2.
  • FIGS. 4 and 5 corresponds to that according to FIGS. 1, 2 and 3, with the exception of the differences in the sealing ring 50 specified below, which is why the same reference numbers relate to the same parts and reference is made to the description of FIGS. Contrary to the embodiment of the sealing ring 50 of FIGS. 1 to 3, the sealing ring according to FIGS. 4 and 5 has no groove (57) at the front end 53. However, this would be possible as an option.
  • the sealing ring 50 of FIGS. 4 and 5 has a rear groove 60 at the rear end 54 of the sealing ring 50, contrary to the embodiment of FIGS Sealing body 58 forms the rear groove 60, and the reinforcing ring 59 is pressed into the groove 60.
  • the reinforcement ring 59 is made of a stronger material, e.g. steel or stainless steel, than the sealing body 58 (e.g. made of plastic or rubber) and presses it from the inside against the screw element 10 and also in the opposite direction against the pin 20 Sealing body 58 is therefore additionally compressed in the radial direction, the contact pressure on the walls of the installation space 33 or of the screw element 10 and the pin 20 is increased and the sealing effect is thus improved.
  • FIGS. 6 shows an exploded view of a screw conveyor device 1, which can be configured as in FIGS.
  • the blade is pushed with a blade hub 24 in a form-fitting manner onto a blade pin 23 which is formed by the pin 20 .
  • the blade 22 then rotates with the screw element 10 at the same rotational speed.
  • it is a cutter wheel or a cutter disk with a plurality of cutting edges, in this case in particular four cutting edges, distributed over the circumference.
  • the knife 22 is arranged directly opposite the perforated disk 25, the pin 20 being rotatably mounted in a hub 27 of the perforated disk 25.
  • the axial lock 40 can be formed by a threaded connection between the journal 20 and the worm element 10 or by a locking element from the group of cylindrical pins, grub screws and threaded pins.
  • the sealing ring 50 or the sealing body 58 and the reinforcing ring can each be pressed into the installation space with the aid of a mounting sleeve.
  • the expansion of the sealing ring 50, in particular to replace the pin 20, can be done, for example, by making a hole in the sealing ring 50 as a base for a dismantling tool. The dismantling is then carried out by levering out. Levering out of the installation space is possible with common tools such as a screwdriver. This also ensures that a new sealing ring is always used when replacing the journal.
  • the screw conveyor devices 1 shown can each be part of a meat grinder. Then the screw conveyor device 1 should be arranged in a screw housing and driven by a conveyor drive, with a receiving hopper opening into the screw housing, and with the screw conveyor device 1 being designed to convey processing material from the receiving hopper to a rotating knife 22, with the Knife 22 can be such as shown in FIG.
  • Screw conveyor device 34 Locking geometry (in the annular gap) Screw element 40 Axial securing device, face of the screw element 41 Fastening element, screw core 42 Securing ring groove, screw winding Partial geometry (of the locking geometry 50 Sealing ring on the screw element) 51 Inside (of the sealing ring)

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Screw Conveyors (AREA)

Abstract

L'invention concerne un dispositif transporteur à vis (1) pour un hachoir comprenant un élément vis (10) qui présente, à une première extrémité (E1), une liaison par contact axial mutuel (30) avec une broche (20), la liaison (30) formant une complémentarité de forme (31) pour une rotation conjointe. Un espace annulaire (32) est formé au niveau de l'extrémité extérieure de la liaison (30), et un verrouillage axial (40) est prévu entre la broche (20) et l'élément vis (10). Une bague d'étanchéité (50) est compactée dans un espace d'installation (33) formé par l'espace annulaire (32), l'espace d'installation (33) étant directement adjacent à une face d'extrémité (11, 21) de l'élément vis (10) et/ou de la broche (20). L'invention concerne également un hachoir équipé du dispositif transporteur à vis.
PCT/EP2022/069621 2021-07-23 2022-07-13 Dispositif transporteur à vis ayant une broche amovible, et hachoir équipé de celui-ci Ceased WO2023001663A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE202021103953.1 2021-07-23
DE102021119200.5 2021-07-23
DE102021119200.5A DE102021119200B4 (de) 2021-07-23 2021-07-23 Förderschneckenvorrichtung mit demontierbarem Zapfen und Fleischwolf hiermit
DE202021103953.1U DE202021103953U1 (de) 2021-07-23 2021-07-23 Förderschneckenvorrichtung mit demontierbarem Zapfen und Fleischwolf hiermit

Publications (1)

Publication Number Publication Date
WO2023001663A1 true WO2023001663A1 (fr) 2023-01-26

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Application Number Title Priority Date Filing Date
PCT/EP2022/069621 Ceased WO2023001663A1 (fr) 2021-07-23 2022-07-13 Dispositif transporteur à vis ayant une broche amovible, et hachoir équipé de celui-ci

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WO (1) WO2023001663A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042389A1 (de) * 1969-08-29 1971-06-03 Keith Engineering (Sales) Pty Ltd , Banksmeadow, New South Wales (Australien) Fleischhackmaschine
DE2649305C3 (de) 1976-02-17 1980-03-06 Speco Inc., Schiller Park, Ill. (V.St.A.) Lochscheibe für einen Fleischwolf
DE202020105052U1 (de) 2020-09-02 2020-09-08 Lumbeck & Wolter GmbH. & Co. KG. Fleischwolf
DE202020105051U1 (de) 2020-09-02 2020-09-08 Lumbeck & Wolter GmbH. & Co. KG. Fleischwolf

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042389A1 (de) * 1969-08-29 1971-06-03 Keith Engineering (Sales) Pty Ltd , Banksmeadow, New South Wales (Australien) Fleischhackmaschine
DE2649305C3 (de) 1976-02-17 1980-03-06 Speco Inc., Schiller Park, Ill. (V.St.A.) Lochscheibe für einen Fleischwolf
DE202020105052U1 (de) 2020-09-02 2020-09-08 Lumbeck & Wolter GmbH. & Co. KG. Fleischwolf
DE202020105051U1 (de) 2020-09-02 2020-09-08 Lumbeck & Wolter GmbH. & Co. KG. Fleischwolf

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