EP0254672B1 - Vorrichtung zum Befestigen von Messern auf einer Messerwelle eines Kutters - Google Patents

Vorrichtung zum Befestigen von Messern auf einer Messerwelle eines Kutters Download PDF

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Publication number
EP0254672B1
EP0254672B1 EP87810209A EP87810209A EP0254672B1 EP 0254672 B1 EP0254672 B1 EP 0254672B1 EP 87810209 A EP87810209 A EP 87810209A EP 87810209 A EP87810209 A EP 87810209A EP 0254672 B1 EP0254672 B1 EP 0254672B1
Authority
EP
European Patent Office
Prior art keywords
piston
screwed
knives
hub body
torque
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
EP87810209A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0254672A2 (de
EP0254672A3 (en
Inventor
Walter Schmidt
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
Priority to AT87810209T priority Critical patent/ATE58654T1/de
Publication of EP0254672A2 publication Critical patent/EP0254672A2/de
Publication of EP0254672A3 publication Critical patent/EP0254672A3/de
Application granted granted Critical
Publication of EP0254672B1 publication Critical patent/EP0254672B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C18/20—Sickle-shaped knives

Definitions

  • a device is known from DE-C 22 12 374.
  • the knives are pressed axially against a shoulder by means of an annular piston on a cutter shaft of a cutter.
  • the ring piston can be moved on a hub body screwed coaxially into the shaft.
  • the cylinder chamber is connected to a chamber into which a piston screwed into the hub body with a piston rod is immersed.
  • the hub body is screwed into the shaft until the ring piston rests on the knives.
  • the piston is then screwed in, which displaces oil from the chamber into the cylinder chamber.
  • This device has proven very successful. However, it is somewhat difficult to correctly measure the torque on the piston, because emotionally, the effective force is often underestimated due to the low torque required.
  • the present invention is based on the object of developing the described device in such a way that the contact pressure on the knives can be metered precisely. This object is achieved by the characterizing features of claim 1.
  • FIG. 1 for the sake of a better overview, only one half of the axial section of a knife shaft 1 of a cutter with clamped knives is shown.
  • the cutter shaft 1 has an axial bore 2 with an internal thread 3 at its end.
  • a threaded pin 4 a of a hub body 4 is screwed into this.
  • the hub body 4 contains an axial cylinder bore 5, into which a piston 6 is inserted.
  • This has an inwardly projecting piston rod 6a, at the end of which is a thread 6b which engages in an internal thread of the pin 4a of the hub body 4.
  • a locking ring 7 is arranged, which prevents the piston 6 from being inadvertently unscrewed from the hub body 4.
  • the hub body 4 On the hub body 4 there is an axially displaceable ring piston 8, which is prevented from rotating relative to the latter by bolts 9 inserted in the hub body 4.
  • An annular cylinder space 10 is formed between a wall of the hub body 4 and a wall of the annular piston 8 and is connected to the chamber 5a of the cylinder bore 5 via bores 11.
  • the chamber 5a and the room 10 are filled with oil.
  • the hub body 4 has axially parallel bores 14, into which pins of a special key can be inserted, in order to enable the entire clamping head to be screwed into the thread 3 of the knife shaft 1. Between the parts 4, 6 and 8 seals are attached, which are only indicated in the drawing. Knives 20 are clamped on the knife shaft 1 between clamping rings 16, 17 and spacer rings 18, 19.
  • the annular piston 8 is supported on the clamping ring 17 and presses it together with the knives 20 and the rings 18, 19, 16 to the right in the drawing against an annular flange of the shaft 1.
  • the piston 6 has a cylindrical bore 25 and a coaxial threaded bore 26.
  • a screw plug 27 with a cylindrical shaft 28, a cylindrical head 29 and a hexagon socket 30 is screwed into the threaded bore 26.
  • the threaded bore 26 is connected to the chamber 5a via a transverse bore 24.
  • a sleeve-shaped drive part 31 with an external hexagon 32 at the end projecting beyond the piston 6 is guided in the bore 25 and on the head 29 so as to be rotatable and axially displaceable.
  • a prestressed spring plate package 34 is clamped, which presses the drive part 31 against the bottom of the bore 25.
  • a drive ring 36 which is connected in a rotationally fixed manner to the piston 6 via a driver pin 35 and against which the drive part 31 is pressed.
  • the end face 37 of the drive part 31 has a plurality of radial wedge faces 38 which are in engagement with corresponding counter faces 39 in the end face 40 of the ring 36 (FIG. 2).
  • the operation of the clamping device is as follows: After the knife 20 with its clamping and spacer rings 16 to 19 have been put in place, the fully assembled and oil-filled clamping head is screwed into the thread 3 of the knife shaft 1 and tightened by hand as far as possible. Now a key is attached to the hexagon 32 of the drive part 31 and the piston 6 is screwed into the cylinder bore 5. The oil in the chamber 5a is thereby pressurized, which also propagates into the cylinder space 10.
  • the annular piston 8 is thereby pressed against the clamping ring 17, the axial force acting on it being increased in the ratio of the effective annular surfaces of the space 10 to the annular surface 12.
  • the wedge surfaces 38 run on the counter surfaces 39 and the drive part 31 is visibly lifted against the action of the spring 34 and rattles through.
  • the wedge surfaces 38, 39 thus form a torque limitation 41 together with the spring 34. This not only limits the tightening torque precisely, but also indicates that the desired tightening torque has been reached acoustically and optically. This ensures that the knives 20 are neither excessively nor insufficiently tensioned.
  • the piston 6 is first unscrewed into the end position shown in the drawing and then the entire clamping head is loosened by hand to the extent necessary for changing the knife, ie for unhooking and inserting and pushing the segment-shaped, sickle-like knives 20 out and into the securing bolts 22 is required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Details Of Cutting Devices (AREA)
  • Shearing Machines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Knives (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Gripping On Spindles (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP87810209A 1986-05-22 1987-04-06 Vorrichtung zum Befestigen von Messern auf einer Messerwelle eines Kutters Expired - Lifetime EP0254672B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87810209T ATE58654T1 (de) 1986-05-22 1987-04-06 Vorrichtung zum befestigen von messern auf einer messerwelle eines kutters.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2074/86 1986-05-22
CH2074/86A CH669339A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1986-05-22 1986-05-22

Publications (3)

Publication Number Publication Date
EP0254672A2 EP0254672A2 (de) 1988-01-27
EP0254672A3 EP0254672A3 (en) 1988-09-21
EP0254672B1 true EP0254672B1 (de) 1990-11-28

Family

ID=4225293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87810209A Expired - Lifetime EP0254672B1 (de) 1986-05-22 1987-04-06 Vorrichtung zum Befestigen von Messern auf einer Messerwelle eines Kutters

Country Status (5)

Country Link
EP (1) EP0254672B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE58654T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH669339A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3766438D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES2018697B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH688542A5 (de) * 1994-12-21 1997-11-14 Waelchli Hans Vorrichtung zur Messerbefestigung an einem Kutter.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740978C (de) * 1938-09-02 1943-11-02 Zahnraederfabrik Augsburg Vorm Sicherheitshauptkupplung fuer Walzwerke
NL6510026A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1965-08-03 1967-02-06
DE2212374C2 (de) * 1972-03-15 1986-01-23 C. Hoegger & Cie. AG, Gossau Spannkopf zum Festspannen der Messersätze auf der Messerwelle einer Fleischzerkleinerungsmaschine
US3889490A (en) * 1974-05-16 1975-06-17 Felix J Nadolny Torque control adaptor for ratchet wrench

Also Published As

Publication number Publication date
ES2018697B3 (es) 1991-05-01
DE3766438D1 (de) 1991-01-10
EP0254672A2 (de) 1988-01-27
CH669339A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-03-15
ATE58654T1 (de) 1990-12-15
EP0254672A3 (en) 1988-09-21

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