EP0584101B1 - Zahn und zahnadaptervorrichtung fuer schaufelradbagger - Google Patents

Zahn und zahnadaptervorrichtung fuer schaufelradbagger Download PDF

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Publication number
EP0584101B1
EP0584101B1 EP92909045A EP92909045A EP0584101B1 EP 0584101 B1 EP0584101 B1 EP 0584101B1 EP 92909045 A EP92909045 A EP 92909045A EP 92909045 A EP92909045 A EP 92909045A EP 0584101 B1 EP0584101 B1 EP 0584101B1
Authority
EP
European Patent Office
Prior art keywords
tooth
main part
holder
tooth holder
universal main
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
EP92909045A
Other languages
English (en)
French (fr)
Other versions
EP0584101A1 (de
Inventor
Norbert Guerard
Nicolas Cornely
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.)
Magotteaux International SA
Original Assignee
Magotteaux International SA
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 BE9100425A external-priority patent/BE1004793A3/fr
Priority claimed from BE9101075A external-priority patent/BE1005528A4/fr
Application filed by Magotteaux International SA filed Critical Magotteaux International SA
Publication of EP0584101A1 publication Critical patent/EP0584101A1/de
Application granted granted Critical
Publication of EP0584101B1 publication Critical patent/EP0584101B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2825—Mountings therefor using adapters
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2858—Teeth characterised by shape

Definitions

  • the present invention relates to an assembly consisting of a tooth and the tooth holder in several parts which adapts thereto making it possible to join it to milling heads.
  • the rate of replacement of the tooth and tooth holder elements of a milling head can be extremely high. For example, it may be necessary to replace all of these teeth and tooth holders an average of ten times a year. In particular, the replacement of a tooth holder on a milling head is an operation that is both long and costly because it is necessary to weld it on the milling head.
  • the teeth to be fitted on the tooth holders are essentially of two types: male type or female type.
  • the male type teeth have a handle which is introduced into a correspondingly shaped cavity of a tooth holder, while the female type teeth fit on a tooth holder having a handle which is inserted into the tooth.
  • Patent application DE-3,731,459 describes a male tooth with a handle in the shape of a truncated cone adaptable in a cavity of corresponding shape of a tooth holder consisting of two parts.
  • This tooth holder comprises a rear part secured to a milling head and a main part capable of carrying a tooth.
  • the attachment of these two parts of the tooth holder is effected by an interlocking, in the form of a truncated cone, present on the main part of the tooth holder in a cavity of corresponding shape in the rear part of the tooth holder.
  • the attachment of the tooth and the various parts of the tooth holder is ensured by a fixing device located at the base of the tooth holder.
  • this tooth / tooth holder assembly has a free surface located between the neck of the tooth and the upper edge of the main part of the tooth holder, and on which the bending and twisting forces are very marked.
  • Patent application GB-2 143 801 describes a tooth
  • this nesting offers little resistance to the bending and twisting forces exerted on the tooth and the tooth holder during drilling or earthmoving operations.
  • Document DE-C-3,731,459 describes a male tooth with a handle in the form of a truncated cone adaptable in a cavity of corresponding shape of a tooth holder consisting of two parts.
  • This tooth holder comprises a rear part secured to a milling head and a main part capable of carrying a tooth.
  • the two parts of the tooth holder are joined together by an interlocking, in the form of a truncated cone, present on the main part of the tooth holder in a correspondingly shaped cavity in the rear part of the tooth holder.
  • the solution proposed in this document consists in preventing the rotation of the different parts of the tooth holder using a key inserted into an orifice.
  • a fixing device located at the base of the main part of the tooth holder.
  • This device also consists of the key mentioned above which is introduced into the corresponding orifice.
  • this device constituted by the key performs several functions simultaneously: securing the tooth with the tooth holder and correct positioning both of the main part of the tooth holder in the rear part and of the tooth itself in the main part of the tooth holder.
  • this tooth / tooth holder assembly has a free surface located between the neck of the tooth and the upper edge of the main part of the tooth holder and on which the torsional forces are very marked. This free surface causes significant local wear at this location of the tooth and of the main part of the tooth holder and therefore causes a relatively high rate of replacement of the various elements.
  • the tooth has a handle split over the entire length so as to have two branches. This handle is inserted into a housing of the tooth holder which essentially has a shape corresponding to that of the handle of the tooth. parallelepiped.
  • a small groove is shown in the housing of the tooth holder in the various figures of this document. This does not in any case cooperate with a corresponding rib on the handle of the tooth and can therefore never serve as a means of attachment between the tooth and the tooth holder.
  • connection between the tooth and the tooth holder is carried out using a key which, after engagement of the handle of the tooth in the housing of the tooth holder, is introduced into an orifice of the tooth holder and thus allows spread the two branches of the tooth handle to block it in the housing.
  • the present invention aims to provide, while avoiding the drawbacks of the solutions of the prior art, a tooth / tooth holder assembly having a high resistance in bending and in torsion
  • the present invention also aims to provide a solution which allows less frequent replacement of the tooth holder on a milling head or cutter, without having to increase the frequency of replacement of the tooth adapting thereto.
  • the present invention aims to provide a solution offering an appreciable economic gain by better use of the material.
  • the invention relates to a tooth / tooth holder assembly consisting of a tooth and a tooth holder in several parts comprising a rear part intended to be made integral with a milling head and at least one universal main part capable of wear the tooth, the means of attachment between the universal main part and the rear part of the tooth holder being constituted by an interlocking of the universal main part which engages in a correspondingly shaped cavity in the rear part of the tooth holder, and the fastening means between the tooth and the universal main part comprising a handle present on the tooth or on the universal main part of the tooth holder which is introduced into a central cavity of the universal main part of the tooth holder or the tooth characterized in that the interlocking between the universal main part and the rear part of the tooth holder is in the form of a pyramidal trunk, preferably e with square or rectangular section; and in that at least one rib and / or groove present on the handle of the universal part of the tooth holder or of the tooth engages in at least one groove and / or rib of
  • the attachment of the tooth to the tooth holder is also effected by the introduction of the handle of the tooth into a central cavity of the universal main part of the tooth holder and by a notch on the handle of the tooth which fits on an external key which will then be introduced into the central cavity of the universal main part of the tooth holder.
  • the characteristics of the tooth / tooth holder assembly according to the present invention can also apply to female type teeth which have an internal cavity in which fits the corresponding handle of the universal main part of the holder. -tooth.
  • the handle of the universal main part of the tooth holder has a notch on which is fitted a key which will then be introduced into the central cavity of the tooth.
  • the universal main part of the tooth holder also has chamfers at its base providing a weld section between the two contact surfaces of the two parts of the tooth holder.
  • the tooth has at its base a skirt of flared shape which preferably has an overflow which is greater than the width of the tooth holder.
  • flared means that the angle relative to the central axis presented by the outer profile of the skirt at its base is significantly greater than the angle formed at the tip of the tooth, always relative to the 'central axis.
  • This provides additional wear protection for the two parts of the tooth holder and possibly a part of the milling head serving as a support for the tooth holders.
  • Another aspect of the invention relates to the tooth of the male or female type intended for the tooth / tooth holder assembly according to the invention and comprising at its base a skirt of flared shape.
  • the tooth holder has two parts: a rear part 1 adaptable according to the type of milling head and a universal main part 2 adapted to wear tooth 6.
  • the length of the universal main part 2 is significantly greater than that of the rear part 1.
  • the means of joining together between the party main universal 2 and the rear part 1 of the tooth holder consists of a socket 3 of pyramidal shape, preferably of square or rectangular section, which engages in a cavity 3 'of corresponding shape of the rear part 1 of the door -tooth.
  • This socket 3 ensures rapid lateral and angular axial positioning of the universal main part 2 in the rear part 1 of the tooth holder and contributes to reducing the weld section necessary for their joining.
  • the latter in order to strengthen the connection between the rear part 1 and the universal main part 2 of the tooth holder, the latter also has chamfers 12 offering a relatively small weld section between the contact surfaces of the two parts of the tooth holder .
  • This particular form of attachment advantageously allows faster replacement of the universal main part which, of the parts of the tooth holder, undergoes the most significant wear.
  • the attachment means between the universal main part 2 and the tooth 6 are preferably constituted by ribs 20 of the tooth holder which engage in grooves 21 of corresponding shape of the tooth 6. These grooves end in pins 4 lateral which engage in cavities 5 of a corresponding shape of tooth 6.
  • the tooth 6 which fits on the universal main part 2 of the tooth holder is a so-called male tooth having a handle 7 which is introduced into the central cavity 8 of the universal main part 2 and the connection between the tooth and the universal main part 2 of the tooth holder is also produced by a notch 9 present on the handle 7 of the tooth 6 which is fitted onto a key 10 which will then be introduced into the central cavity 8 of the universal main part 2.
  • This forward extension due to the lateral pins 4 of the tooth holder can also transmit a torque and thus contributes to increasing the resistance to torsion of the connection between the tooth 6 and the universal main part of the tooth holder 2.
  • the means of attachment between the tooth 6 and the universal main part of the tooth holder can be constituted by the core 13 and the wings 14 of the handle 7 of the tooth 6, forming a rib which engage in cavities 15 forming a groove of corresponding shape of the universal main part 2 of the tooth holder.
  • the extension of the universal main part 2 of the tooth holder forwards in the form of lateral pins 4 has the effect of reducing the vertical reaction of the handle 7 of the tooth 6 due to bending forces and, consequently, of reducing the maximum bending moment at the connection between the handle 7 and the tip 24 of the tooth 6.
  • the tooth of the tooth / tooth holder assembly has at its base a skirt 23 of flared shape which advantageously protects the tooth holder from wear.
  • the loose materials during the rotation of the milling heads are deflected by the flared shape of the tooth and the particles are projected so as not to come into direct contact with the tooth holder.
  • the skirt 23 has an overflow with respect to the tooth holder, that is to say if the height H2 of the skirt 23 of the tooth 6 is preferably between 1.1 and 1, 2 times the height H1 of the tooth holder.
  • the width of the skirt B2 can be understood between 1.1 and 1.2 times the width B1 of the tooth holder.
  • This protection makes it possible to multiply the life of the tooth holder by at least a factor of 3.
  • the teeth having a flared skirt allow an economic gain which can be estimated at BEF 3,000,000 per year.
  • the tooth / tooth holder assembly will have improved bending and torsional strength compared to the prior art due to the forward extension of the connection between the tooth and the universal main part of the tooth holder.
  • the rear part 1 of the tooth holder is preferably made according to the current forms of the state of the art. It comes in the form of a welding nose with or without reinforcement allowing it to adapt to existing milling heads. This means, in particular, that the rear part 1 conventionally has two chamfers 15 of large code section for the tooth holders produced in one piece according to the prior art.
  • this rear part 1 which is of simple shape is not frequently replaced.
  • the universal main part 2 of the tooth holder is subject to much greater wear, in particular due to imperfect contact between the tooth and the universal main part of the tooth holder which produces deterioration. progressive contact surfaces which necessitates frequent replacement of the universal main part 2.
  • the rear part 1 of the tooth holder is extended by two lugs 16 whose spacing is equal to the thickness of the milling head 17 and which are each welded to one of the faces of the milling head 17.
  • This type of more robust tooth holder is called "double leg".
  • this “double leg” configuration takes longer to weld than the conventional nose-shaped configuration, a “double leg” tooth holder produced in two parts according to the invention does not require positioning calibration when changes the universal main part of the tine holder, which allows easy replacement on site.
  • the two-part construction of the tooth holder saves time and money. particularly important material in the case of a "double leg" configuration in two parts.
  • the replacement only of the universal main part of the tooth holder according to the invention is carried out in two or three hours instead of the ten to twelve hours necessary when it is necessary to replace the whole tooth holder on the milling head .
  • the shape of the universal main part 2 of the tooth holder described above is unique for all milling heads, only the rear part 1 varies according to the type of milling for which it is intended; whereas previously it was necessary to provide a complete tooth holder for each configuration of the milling head, depending on whether it had to have a nose to be welded without or with one or two reinforcements, or depending on whether it was 'a double leg tooth holder.
  • the tooth / tooth holder assembly according to the invention is more resistant to the forces of bending and twisting, wears less quickly than the prior art tooth / tooth holder assemblies.
  • the rear part of the tooth holder can vary between 3.3 kg for a conventional tooth holder while the universal main part weighs 6.3 kg. If we consider that a "cutter" has 48 teeth and that on average we must make 500 replacements per cutter per year of the universal main part of the tooth holder, the amount of material saved can be estimated at a minimum at 1,650 kg per year per cutter, i.e. a saving of around 200,000 BEF per year per cutter .
  • the shape of the tooth handle of the tooth / tooth holder assembly according to the present invention also allows a more rational use of the material, while making it possible to reinforce the resistance of this tooth to the bending and twisting forces. .
  • the tooth described in the preferred embodiment of the invention is a tooth of the male type.
  • Those skilled in the art can easily produce a tooth / tooth holder assembly having the essential characteristics of the tooth / tooth holder assembly according to the present invention for a female type tooth.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Component Parts Of Construction Machinery (AREA)

Claims (10)

  1. Zahn/Zahnhalter-Einheit aus einem Zahn (6) und einem mehrteiligen Zahnhalter, der einen hinteren Teil (1) aufweist, der dazu bestimmt ist, mit einem Fräskopf fest verbunden zu werden, und mindestens einen universalen Hauptteil (2) aufweist, der den Zahn (6) aufnehmen kann, wobei die Verbindungsmittel zwischen dem universalen Hauptteil (2) und dem hinteren Teil (1) des Zahnhalters aus einem Vorsprung (3) des universalen Hauptteils (2) bestehen, der in einen entsprechend geformten Hohlraum (3') des hinteren Teils (1) des Zahnhalters eingreift, und die Verbindungsmittel zwischen dem Zahn (6) und dem universalen Hauptteil (2) einen auf dem Zahn (6) oder auf dem universalen Hauptteil (2) des Zahnhalters vorgesehenen Schaft (7) aufweisen, der in einen zentralen Hohlraum (8) des universalen Hauptteils (2) des Zahnhalters oder des Zahns (6) eingeschoben ist; dadurch gekennzeichnet, daß der Vorsprung (3) die Form eines Pyramidenstumpfes hat, vorzugsweise mit quadratischem oder rechteckigem Querschnitt; und daß mindestens eine Rippe (20) und/oder Nut, die auf dem Schaft (7) des universalen Hauptteils (2) des Zahnhalters oder des Zahns (6) vorgesehen ist, in mindestens eine entsprechend geformte Nut (21) und/oder Rippe eingreift, die in dem Hohlraum (8) des Zahns (6) oder des universalen Hauptteils (2) vorgesehen ist.
  2. Einheit gemäß Anspruch 1, dadurch gekennzeichnet, daß der Schaft (7) des Zahns (6) oder des universalen Hauptteils (2) einen Einschnitt (9) aufweist, in den ein äußerer Keil (10) eingeschoben wird, wenn der Schaft (7) in dem zentralen Hohlraum (8) des universalen Hauptteils (2) oder des Zahns (6) angeordnet ist.
  3. Einheit gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Nut oder die Nuten (21) auf dem Schaft (7) des Zahns (6) oder des universalen Hauptteils (2) vorgesehen sind, und in entsprechende Rippen (20) eingreifen können, die in dem zentralen Hohlraum (8) des universalen Hauptteils (2) oder des Zahns (6) vorgesehen sind.
  4. Einheit gemäß Anspruch 3, dadurch gekennzeichnet, daß die Rippe oder die Rippen (20) des zentralen Hohlraums (8) des universalen Hauptteils (2) des Zahnhalters mit einem Zapfen (4) abschließen, der in einen entsprechend geformten Hohlraum (5) des Zahns (6) eingreift.
  5. Einheit gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der universale Hauptteil (2) Schrägkanten (12) umfaßt, die einen Schweißabschnitt zwischen den zwei Kontaktflächen der zwei Teile (1, 2) des Zahnhalters bieten.
  6. Einheit gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der hintere Teil (1) des Zahnhalters durch zwei Laschen (16) verlängert ist, deren Abstand gleich der Dicke des Fräskopfes (17) ist, und die dazu bestimmt sind, auf jeweils eine der Flächen des Fräskopfes (17) aufgeschweißt zu werden.
  7. Einheit gemäß irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Zahn (6) an seiner Basis einen konisch erweiterten Mantel (23) umfaßt.
  8. Einheit gemäß Anspruch 7, dadurch gekennzeichnet, daß die Basis des konisch erweiterten Mantels (23) des Zahns (6) einen Überhang aufweist, der breiter als der Zahnhalter ist.
  9. Einheit gemäß Anspruch 7 oder 8, dadurch gekennzeichnet, daß die Höhe und die Breite (H₂, B₂) des Mantels (23) 1,1- bis 1,2mal so groß wie die Höhe (H₁) bzw. die Breite (B₁) des Zahnhalters sind.
  10. Einheit gemäß irgendeinem der Ansprüche 7 bis 9, dadurch gekennzeichnet, daß der an der Spitze (24) des Zahns bezüglich der zentralen Achse des Zahns gebildete Winkel (α₁, β₁) zwischen 5 und 15° liegt, während der Winkel (α₂, β₂), den das äußere Profil des Zahnmantels an der Zahnbasis bildet, zwischen 30 und 45° liegt.
EP92909045A 1991-05-07 1992-05-06 Zahn und zahnadaptervorrichtung fuer schaufelradbagger Expired - Lifetime EP0584101B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
BE9100425 1991-05-07
BE9100425A BE1004793A3 (fr) 1991-05-07 1991-05-07 Ensemble dent/porte-dent destine a des tetes de fraisage.
BE9101075A BE1005528A4 (fr) 1991-11-21 1991-11-21 Ensemble dent/porte-dent destine a des tetes de fraisage.
BE9101075 1991-11-21
PCT/BE1992/000015 WO1992019822A1 (fr) 1991-05-07 1992-05-06 Ensemble dent/porte-dent destine a des tetes de fraisage

Publications (2)

Publication Number Publication Date
EP0584101A1 EP0584101A1 (de) 1994-03-02
EP0584101B1 true EP0584101B1 (de) 1995-08-09

Family

ID=25662582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92909045A Expired - Lifetime EP0584101B1 (de) 1991-05-07 1992-05-06 Zahn und zahnadaptervorrichtung fuer schaufelradbagger

Country Status (4)

Country Link
EP (1) EP0584101B1 (de)
AU (1) AU1981392A (de)
ES (1) ES2077412T3 (de)
WO (1) WO1992019822A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2146541B1 (es) 1998-06-08 2001-04-01 Metalogenia Sa Dispositivo para el acoplamiento de dientes de excavadoras.
ES2146174B1 (es) 1998-07-03 2002-01-16 Metalogenia Sa Acoplamiento para dientes de excavadoras y similares.
ES2158805B1 (es) * 1999-10-01 2002-04-01 Metalogenia Sa Perfeccionamientos en los acoplamientos para dientes de maquinas para movimiento de tierras.
EP1778924A4 (de) * 2004-08-02 2011-07-06 Bradken Operations Pty Ltd Zahn und adapteranordnung
US20060255653A1 (en) 2004-09-02 2006-11-16 John Gibbins Replacement Part Assembly
CN103441454B (zh) * 2013-07-29 2016-02-10 内蒙古祥宇通信网络工程有限公司 一种开沟机刀头
EP2966228A1 (de) 2014-07-11 2016-01-13 Metalogenia Research & Technologies S.L. Zahn und Adapter für eine Baggermaschine
EP3358089A1 (de) * 2017-02-07 2018-08-08 Leo Dynamische Investering B.V. Schneidkopf und zahnsystem
DE102018203913A1 (de) 2018-03-14 2019-09-19 Thyssenkrupp Ag Aufnahmeanordnung eines Baggerzahnes mit einer Aufnahme zur Anordnung an der Schaufel eines Schaufelradbaggers
US12553342B2 (en) * 2022-08-02 2026-02-17 Kennametal Inc. Cutter tooth assembly for an excavating tool

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1951988A (en) * 1931-12-30 1934-03-20 Mckeel Van Cortright Digger tooth
US2921391A (en) * 1955-07-06 1960-01-19 American Steel Foundries Dipper tooth assembly
US4028823A (en) * 1975-10-31 1977-06-14 Edwards Gerald D Digging tooth
SE450504B (sv) * 1983-07-26 1987-06-29 Bofors Wear Parts Ab Slitdelssystem for verktyg till jordbearbetningsmaskiner
US4835888A (en) * 1987-05-01 1989-06-06 Hemphill Charles W Excavating tooth and holder therefor
DE3731459C1 (de) * 1987-09-18 1989-03-16 Hoesch Ag Schneidrad fuer Saug- oder Schaufelradbagger

Also Published As

Publication number Publication date
AU1981392A (en) 1992-12-21
WO1992019822A1 (fr) 1992-11-12
EP0584101A1 (de) 1994-03-02
ES2077412T3 (es) 1995-11-16

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