EP0649945B1 - Dent d'excavatrice - Google Patents

Dent d'excavatrice Download PDF

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Publication number
EP0649945B1
EP0649945B1 EP94810378A EP94810378A EP0649945B1 EP 0649945 B1 EP0649945 B1 EP 0649945B1 EP 94810378 A EP94810378 A EP 94810378A EP 94810378 A EP94810378 A EP 94810378A EP 0649945 B1 EP0649945 B1 EP 0649945B1
Authority
EP
European Patent Office
Prior art keywords
tooth
nose
wedge
cap
cavity
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
EP94810378A
Other languages
German (de)
English (en)
Other versions
EP0649945A1 (fr
Inventor
Peter Eichelberger
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.)
Liebherr Hydraulikbagger GmbH
Original Assignee
Baz Service AG
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27170098&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0649945(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Baz Service AG filed Critical Baz Service AG
Publication of EP0649945A1 publication Critical patent/EP0649945A1/fr
Application granted granted Critical
Publication of EP0649945B1 publication Critical patent/EP0649945B1/fr
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
    • 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
    • E02F9/2816—Mountings therefor
    • E02F9/2833—Retaining means, e.g. pins

Definitions

  • the invention relates to an excavator tooth according to the preamble of patent claim 1.
  • the excavator tooth consists essentially of two parts, a tooth holder and a tooth cap.
  • the tooth holder is used to fasten the tooth to the implement and is provided at one end with a tooth nose that is approximately wedge-shaped and is a carrier of the tooth cap.
  • the tooth cap is a wedge-shaped body with a cavity that is open on one side, which is pushed onto the tooth nose and fastened.
  • the two-part design of the excavator tooth takes into account the fact that, above all, the tooth cap is subject to considerable wear and tear during operation. It must therefore be replaced as required while the tooth holder remains intact.
  • DE-C-1 255 595 describes an excavator tooth, the tooth nose of which has a curved wedge surface formed as part of a rotating body, the axis of which approximately coincides with the longitudinal axis of the fastening bolt.
  • the tooth cap has a cavity adapted to the wedge shape of the tooth nose.
  • tongues are formed on the mouth of the cavity of the tooth cap, which are taken up by recesses in the root of the nose. There are thus places of increased stress with correspondingly large wear. So that these interlocking points are held together, a fastening bolt is used using an elastic locking device
  • the excavator tooth according to US Pat. No. 5,177,886 has a tooth nose designed as a steep thread with nose parts lying between the threads. Only at the tip of the nose and the root of the nose are there support surfaces for the tooth cap. Open spaces in between should enable the tooth cap to be put on and removed without rotation.
  • An excavator tooth is known from US-A-2 050 014, the tooth nose of which is shaped with concave curved wedge surfaces, so that the corners of the cavity of the tooth cap have an acute angle of less than 90 °.
  • the tooth cap is relatively thin-walled and should deform during assembly.
  • the invention also relates to a two-part excavator tooth, which, however, is not intended to have the limitations of the known excavator teeth. Rather, the wedge surfaces of the tooth nose and the recess of the tooth cap should be designed in such a way that a surface support of the wedge surfaces, via which the forces occurring at the tooth nose are transmitted, regardless of the direction from which they are attacking the tooth nose.
  • the tooth holder 1 shown in FIG. 1 is composed of a fastening part 2 and a tooth nose 3.
  • the tooth holder 1 With the fastening part 2, the tooth holder 1 is on one Tool of a construction machine, for example attached to the bucket edge of an excavator bucket, preferably welded on.
  • the fastening part 2 can be of any shape, its end face 4, as the part directly connected to the tooth nose 3, expediently remaining unchanged or being changed only to the extent that the tooth nose 3 is not influenced. It is irrelevant whether the fastening part 2 is shaped with one arm or with two arms.
  • the invention relates exclusively to the tooth nose 3 and the tooth cap 5 which can be plugged onto the same, see FIGS. 2 and 5.
  • the tooth nose 3 is a wedge-shaped body with a rounded nose edge 7. Its two wedge surfaces 8, 9 are delimited by side surfaces 10, 11 which are slightly roof-shaped in relation to the central plane 12 of the wedge surfaces 8, 9.
  • the wedge surfaces 8, 9 of the tooth nose 3 are convexly curved and have an arcuate profile 15.
  • the radius of curvature R of the profile 15 perpendicular to the longitudinal axis 16 varies continuously from the root of the nose 17 to the edge 7 of the nose, namely with increasing radius of curvature R.
  • the ratio of the radii R at these points is approximately 1: 1.38 ... 1.64, preferably 1 : 1.5.
  • a guide bar 18 is formed on the wedge surfaces 8, 9 of the tooth nose 3, which extends over the central region of the longitudinal axis of the tooth nose 3 and merges into the wedge surface 8, 9 at a distance from the nose edge 7.
  • the width of the guide web 18 is less than about a third of the width of the wedge surfaces 8.9 and its height is only a few millimeters, for example 3 ... 5 mm.
  • a bore 20 passes through the tooth nose 3. Its axis 21 runs in or parallel to the center plane 12 of the tooth nose 3. In addition, their diameter at the bore ends is 3 ... 4 mm larger than the diameter in the central part of the bore 20 and merges with a bevel 19 into the central bore part. With this arrangement, the wedge surfaces 8, 9 are completely available for supporting the toothed cap 5.
  • the side surfaces 10, 11 are somewhat conical to the longitudinal axis. They are not required to absorb lateral forces; this takes place through the curvature of the wedge surfaces and to a lesser extent through the guide web 18.
  • the tooth nose 3 is delimited by the end face 4 of the fastening part 2, which has the shape of a blunt wedge, the edge of which lies in the central plane 12 of the tooth nose 3.
  • the end face 4 projects over the edges of the nose root 17, see FIG. 4, and has approximately the extent of the edge of the tooth cap 5.
  • the toothed cap 5 is a wedge-shaped body, the edge 23 of which extends roof-shaped to the longitudinal axis 16.
  • the tooth cap 5 has a wedge-shaped cavity 24, the dimensions of which correspond identically to those of the tooth nose 3 and the wedge surfaces 25, 26 of which are concavely curved to the same extent as the wedge surfaces 8, 9 of the tooth nose 3 are convexly curved. Accordingly, the radii of curvature R of the circular profiles 15 lying perpendicular to the longitudinal axis 16 run in the same way as for the toothed cap 3, ie continuously from the bottom 28 of the cavity 24 to the mouth 29 with a decreasing radius of curvature.
  • a groove 30 is cut out, which serves to receive the guide bar 18 of the tooth nose 3, see FIG. 7. This does not extend to the edge of the mouth 29, see FIG. 5, but runs out beforehand and merges into the wedge surfaces 25, 26. This ensures that there is an uninterrupted wall portion of the cavity 24 in the region of the mouth 29, which rests on a likewise uninterrupted wall portion of the nose root 17. Any holding means for locally holding the tooth cap, such as are used in excavator teeth, are missing, and the hole for a fastening bolt also passes through the tooth nose 3 and the tooth cap 5 outside the wedge surfaces 8, 9, 25, 26.
  • the outer shape of the toothed cap 5, see FIGS. 6 and 7, has a greater width at the wedge edge 23 than in the mouth area.
  • Ribs 35 extend on the longitudinal edges, while on the side surfaces 32, 33 there is a bore 34 for receiving the securing bolt, preferably a heavy-duty spring pin, the diameter of which is somewhat larger than the bore in the tooth nose 3.
  • the securing bolt does not have the task of directing large forces from the tooth cap 5 to the tooth nose 3 - this is achieved by the surface support of the wedge surfaces 8, 9, 25, 26 - but serves to secure the cohesion of the tooth cap 5 and tooth nose 3 .
  • the tooth holder 1 and the tooth cap 5 are expediently produced as drop-forged parts.
  • the casting of these parts is also applicable, but one achieves with drop forging because of the possible use high-alloy steels higher strength.
  • the profiles 15 of the wedge surfaces 8, 9 of the tooth nose 3 are rounded at the edges 36, see FIG. 3, as are the wedge surfaces 25, 26 of the tooth cap 5, see FIG. 7.
  • the formation of the tooth nose 3 and the tooth cap 5 in accordance with the type described surprisingly results in a large-area surface support on the wedge surfaces 8, 9, 25, 26 despite the usual tolerances. This avoids local, highly stressed areas.
  • the securing bolt does not cross the load-bearing wedge surfaces, as in known designs, but rather little-stressed points in the side surfaces 10, 11, 32, 33. Therefore, the bore 20 can be somewhat larger at the ends than in the middle part. This simplifies the assembly of the securing bolt if the distance between the excavator teeth is relatively small in the case of an implement. In this case, the securing bolt can be inserted obliquely into the bore 20 and hammered in, whereby it slides over the bevel 19 into the central bore part.
  • the bore 34 in the side surfaces 32, 33 of the toothed cap 5 is still somewhat larger than the bore 20 of the toothed nose 3 at its ends, see FIG rests and so holds the tooth cap 5 on the tooth nose 3.

Claims (4)

  1. Dent d'excavatrice destinée à être fixée à l'extrémité de la pelle d'une excavatrice, comprenant un support (1) avec un nez de dent (3) en forme de coin, déterminé, dépassant de l'extrémité de la pelle et d'une pointe (5) en forme de coin qui s'emmanche sur le nez (3) et y fixée, le nez (3) ayant deux surfaces en forme de coin (8, 9) opposées de part et d'autre de l'axe longitudinal (16), délimitées par des surfaces latérales (10, 11), et cette pointe de dent (5) délimitée par les surfaces latérales (32, 33) ayant une cavité (24) avec des surfaces de coin (25, 26) identiques aux surfaces de coin (8, 9) du nez (3), caractérisée en ce que les surfaces en forme de coin (8, 9, 25, 26) sont limitées en largeur dans des coupes perpendiculaires à l'axe longitudinal (16) (figures 3, 4, 7) par un profil circulaire (15) dont le rayon R diminue en continu en direction du support de dent (1) et dans la zone médiane des surfaces en forme de coin (8, 9, 25, 26), parallèlement à l'axe longitudinal (16), le nez de dent (3) comporte une branche de guidage (18) et pour sa réception, une rainure longitudinale (30) dans la cavité (24) de la pointe de dents (5), la fixation de la pointe de dent (5) étant assurée par un perçage (20, 34) dans les surfaces latérales (10, 11, 32, 33) pour recevoir un goujon de fixation à une certaine distance de l'embouchure (29) de la cavité (24) dans ou parallèlement au plan médian (12) des surfaces en forme de coin (8, 9, 25, 26).
  2. Dent d'excavatrice selon la revendication 1, caractérisée en ce que le rayon (R) du profil circulaire (15) varie dans le rapport de 1 : 1,38 ... 1,64 et est de préférence de 1 : 1,5.
  3. Dent d'excavatrice selon la revendication 1 ou la revendication 2, caractérisée en ce que la rainure longitudinale (30) se poursuit en direction de l'embouchure (29) de la cavité (24) selon une forme aplatie rejoignant la surface en forme de coin (25, 26) pour recevoir la branche de guidage (18).
  4. Dent d'excavatrice selon la revendication 1 ou la revendication 2, caractérisée en ce que la distance du perçage (20, 34) par rapport à l'embouchure (29) de la cavité (24) correspond sensiblement à un tiers de la longueur totale de la cavité (24).
EP94810378A 1993-08-30 1994-06-24 Dent d'excavatrice Expired - Lifetime EP0649945B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH2564/93 1993-08-30
CH256493 1993-08-30
US08/558,276 US5778570A (en) 1993-08-30 1995-11-13 Excavator tooth
CA002163164A CA2163164C (fr) 1993-08-30 1995-11-17 Excavateur dentaire

Publications (2)

Publication Number Publication Date
EP0649945A1 EP0649945A1 (fr) 1995-04-26
EP0649945B1 true EP0649945B1 (fr) 1996-04-17

Family

ID=27170098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810378A Expired - Lifetime EP0649945B1 (fr) 1993-08-30 1994-06-24 Dent d'excavatrice

Country Status (6)

Country Link
US (1) US5778570A (fr)
EP (1) EP0649945B1 (fr)
AT (1) ATE136968T1 (fr)
CA (1) CA2163164C (fr)
DE (1) DE59400217D1 (fr)
ES (1) ES2088698T3 (fr)

Families Citing this family (25)

* 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.
US6047487A (en) * 1998-07-17 2000-04-11 H&L Tooth Co. Multipiece excavating tooth assembly
US20040045742A1 (en) * 2001-04-10 2004-03-11 Halliburton Energy Services, Inc. Force-balanced roller-cone bits, systems, drilling methods, and design methods
ES2158805B1 (es) * 1999-10-01 2002-04-01 Metalogenia Sa Perfeccionamientos en los acoplamientos para dientes de maquinas para movimiento de tierras.
USD435567S (en) * 1999-10-21 2000-12-26 H&L Tooth Co. Digging tooth
US6477796B1 (en) 2000-07-06 2002-11-12 Caterpillar Inc Tooth assembly for implements
NL1015772C2 (nl) * 2000-07-21 2002-01-22 Ihc Holland Nv Samenstel van een tand en een adapter voor een grondbewerkings-machine, zoals een cutter of dergelijke.
ES2168988B1 (es) * 2000-10-03 2003-12-01 Metalogenia Sa Sistema de acoplamiento para los dientes de una excavadora.
US6564482B2 (en) * 2001-04-27 2003-05-20 G. H. Hensley Industries, Incorporated Excavating apparatus with curved adapter/tooth point sliding pivotal interface area
SE0302061L (sv) * 2003-07-11 2004-07-20 Combi Wear Parts Ab Tandsystem
US7114272B2 (en) * 2003-09-09 2006-10-03 H&L Tooth Company Winged digging tooth
JOP20190303A1 (ar) * 2006-02-17 2017-06-16 Esco Group Llc تجميعة مقاومة للتآكل
CA2661786C (fr) * 2006-09-01 2014-01-28 Angel Martinez Dent et adaptateur pour machine de dragage
US8191291B2 (en) * 2008-07-09 2012-06-05 Esco Corporation Wear member for excavating equipment
US8443504B2 (en) * 2010-02-05 2013-05-21 H&L Tooth Company Pin tool assembly for acting on a retaining pin for a tooth of a ground engaging implement
US9062436B2 (en) 2011-10-07 2015-06-23 Caterpillar Inc. Implement tooth assembly with tip and adapter
US8943717B2 (en) 2011-10-08 2015-02-03 Caterpillar Inc. Implement tooth assembly with tip and adapter
US9057177B2 (en) 2011-10-08 2015-06-16 Caterpillar Inc. Implement tooth assembly with tip and adapter
US8943716B2 (en) 2011-10-10 2015-02-03 Caterpillar Inc. Implement tooth assembly with tip and adapter
CN106795708B (zh) * 2014-04-28 2021-04-09 沃尔沃建筑设备公司 齿和用于将所述齿附接到作业机械的接合器
EP3121340B1 (fr) 2015-07-20 2020-05-20 Caterpillar Work Tools B. V. Pointe remplaçable pour un outil de démolition
US20170044741A1 (en) * 2015-08-10 2017-02-16 James Elton Robbins Excavation System
USD859103S1 (en) 2017-10-20 2019-09-10 H&L Tooth Company Tool for acting on a securement member of a digging tooth assembly
CN111155580B (zh) * 2020-01-19 2021-12-03 滕州潍达智能科技有限公司 一种铲斗用植物根系截断装置

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US2050014A (en) * 1934-12-10 1936-08-04 American Manganese Steel Co Box type cap for excavating teeth
US2762139A (en) * 1952-11-03 1956-09-11 Tooth H & L Co Wear plate attachment for digger tooth construction
DE1255595B (de) * 1959-05-02 1967-11-30 Esco Corp Baggerzahn
GB897280A (en) * 1960-10-28 1962-05-23 Cleveland Trencher Co Digger tooth for earth and mineral-excavating machines
US3326302A (en) * 1965-04-06 1967-06-20 Allis Chalmers Mfg Co Ripper tooth
US3536147A (en) * 1968-01-10 1970-10-27 Caterpillar Tractor Co Replaceable ripper tip assembly
US3624827A (en) * 1968-12-11 1971-11-30 Caterpillar Tractor Co Earthworking tooth and supporting adapter
CH527977A (de) * 1970-06-09 1972-09-15 Zepf Hans Rudolf Schaufelzahn an einer Schaufel einer Baumaschine
US3959901A (en) * 1975-06-30 1976-06-01 Caterpillar Tractor Co. High strength earth working penetration tooth
US4360981A (en) * 1977-12-12 1982-11-30 Suncor Inc. Lip and tooth combination for bucket wheel excavator
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US4227744A (en) * 1979-01-29 1980-10-14 Caterpillar Tractor Co. Impact tip for impact rock breaker
US4481728A (en) * 1981-12-01 1984-11-13 Abex Corporation Dipper tooth tip and adapter
SU1588866A1 (ru) * 1987-08-11 1990-08-30 Институт горного дела им.А.А.Скочинского Рабочий инструмент
US5018283A (en) * 1989-08-04 1991-05-28 Deere & Company Loader bucket tooth
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US5379535A (en) * 1992-11-30 1995-01-10 Mobile Pulley & Machine Works, Inc. Replaceable excavating tooth assembly

Also Published As

Publication number Publication date
DE59400217D1 (de) 1996-05-23
ATE136968T1 (de) 1996-05-15
CA2163164C (fr) 2004-07-13
ES2088698T3 (es) 1996-08-16
CA2163164A1 (fr) 1997-05-18
US5778570A (en) 1998-07-14
EP0649945A1 (fr) 1995-04-26

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