EP0232468B1 - Schneidkopfzahn - Google Patents

Schneidkopfzahn Download PDF

Info

Publication number
EP0232468B1
EP0232468B1 EP86114597A EP86114597A EP0232468B1 EP 0232468 B1 EP0232468 B1 EP 0232468B1 EP 86114597 A EP86114597 A EP 86114597A EP 86114597 A EP86114597 A EP 86114597A EP 0232468 B1 EP0232468 B1 EP 0232468B1
Authority
EP
European Patent Office
Prior art keywords
tooth
cutter head
head tooth
cutting head
shaped
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
EP86114597A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0232468A1 (de
Inventor
Otto Ehlert
Dieter Giersch
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.)
Hoesch AG
Original Assignee
Hoesch AG
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 Hoesch AG filed Critical Hoesch AG
Priority to AT86114597T priority Critical patent/ATE50305T1/de
Publication of EP0232468A1 publication Critical patent/EP0232468A1/de
Application granted granted Critical
Publication of EP0232468B1 publication Critical patent/EP0232468B1/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
    • E02F9/2866—Small metalwork for digging elements, e.g. teeth scraper bits for rotating digging elements
    • 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 invention relates to a pyramid-shaped cutting head tooth with a square cross section for a suction excavator.
  • Such cutting head teeth are used for dredging under water and are located as wear parts on rotating cutting heads on a boom of a suction dredger. They are used to loosen sand or rock and are therefore exposed to heavy wear.
  • Cutting head teeth are pyramid-shaped and preferably have a circular rectangular or square cross section. Such cutting head teeth are shown in DE-PS-2 841 523 and DE-OS-3 300 467. Furthermore, it is known to form excavator teeth for bucket excavators for reasons of strength or for heat treatment reasons. DE-AS-2 744 497 shows such an excavator tooth with an I-shaped cross section. Such an excavator tooth with an X-shaped cross-section is described on pages 96 to 99 of the "Zeitschrift für fertigung", volume 79/1984, volume 2.
  • a disadvantage of the known cutting head teeth is a very high thermal load on the tooth due to the strong cutting stress. This high thermal load leads to a reduced wear resistance of the material, which means that the cutting head tooth wears out faster.
  • the training according to excavator teeth for bucket excavators is therefore not suitable for the function as a cutting head tooth, because in this form of training there is no sufficient wear material.
  • trough-shaped depressions are arranged adjacent to the edges of the lateral surfaces of the cutting head tooth.
  • the channel-shaped depressions of each lateral surface converge to form a depression in the region of the tooth tip.
  • the outer surfaces of the pyramid shape are partially or completely curved outwards.
  • the advantages achieved by the invention are, in particular, that better cooling of the cutting head tooth is achieved by the trough-shaped depressions provided according to the invention and the service life of the material used and thus of the entire cutting head tooth is thereby increased.
  • the changed material distribution results in a better moment of resistance against bending on the cutting head tooth, which leads to a reduced material tension and additionally increases the service life of the cutting head tooth.
  • the loosened soil is better transported, which results in higher productivity.
  • a cutting head tooth 1 is pushed onto an adapter 2 and fixed by means of a securing element 3 (FIG. 1).
  • the adapter 2 is welded to the cutting head of a suction excavator, which is not shown.
  • the cutting head tooth 1 can be replaced as a wearing part in a simple manner.
  • the cutting head tooth 1 is pyramid-shaped and has a square cross section.
  • the lateral surfaces 4 of the pyramid-shaped outer contour are flat. However, they can also be wholly or partially curved slightly outwards (FIG. 4).
  • Trough-shaped depressions 6 are arranged adjacent to the edges 5 of the lateral surfaces 4 and run towards the tooth tip 7 in a V-shape. They converge into a depression 8 in the area of the tooth tip 7.
  • the lateral surfaces 4 are slightly curved outwards.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Knives (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Earth Drilling (AREA)
  • Sewing Machines And Sewing (AREA)
EP86114597A 1985-12-19 1986-10-21 Schneidkopfzahn Expired - Lifetime EP0232468B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86114597T ATE50305T1 (de) 1985-12-19 1986-10-21 Schneidkopfzahn.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3545018 1985-12-19
DE3545018A DE3545018C1 (de) 1985-12-19 1985-12-19 Schneidkopfzahn

Publications (2)

Publication Number Publication Date
EP0232468A1 EP0232468A1 (de) 1987-08-19
EP0232468B1 true EP0232468B1 (de) 1990-02-07

Family

ID=6288911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114597A Expired - Lifetime EP0232468B1 (de) 1985-12-19 1986-10-21 Schneidkopfzahn

Country Status (6)

Country Link
EP (1) EP0232468B1 (enrdf_load_stackoverflow)
JP (1) JPS62146329A (enrdf_load_stackoverflow)
AT (1) ATE50305T1 (enrdf_load_stackoverflow)
DE (2) DE3545018C1 (enrdf_load_stackoverflow)
ES (1) ES2013702B3 (enrdf_load_stackoverflow)
GR (1) GR3000458T3 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531787C1 (de) * 1985-09-06 1986-06-26 Berchem & Schaberg Gmbh, 4650 Gelsenkirchen Auswechselbarer Zahn fuer ein Grab- und Brechwerkzeug mit Hartmetallspitze und Kantenbewehrung
BE1004793A3 (fr) * 1991-05-07 1993-02-02 Magotteaux Int Ensemble dent/porte-dent destine a des tetes de fraisage.
US5314029A (en) * 1992-06-15 1994-05-24 Kennametal Inc. Pyramidal shaped, hardened insert for an agricultural tool
US8191291B2 (en) * 2008-07-09 2012-06-05 Esco Corporation Wear member for excavating equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1009254A (en) * 1911-06-08 1911-11-21 Charles L Mckenzie Dipper construction.
US4028823A (en) * 1975-10-31 1977-06-14 Edwards Gerald D Digging tooth
DE2841523C2 (de) * 1978-09-23 1982-06-09 Berchem & Schaberg Gmbh, 4650 Gelsenkirchen Aus Zahn und Adapter bestehender Werkzeugsatz für den Saugkopf von Saugkopfbaggern
DE3300467C2 (de) * 1983-01-08 1986-01-23 Berchem & Schaberg Gmbh, 4650 Gelsenkirchen Adapter für die Befestigung eines Schneidzahnes an dem Saugkopf eines Saugkopfbaggers

Also Published As

Publication number Publication date
ES2013702B3 (es) 1990-06-01
EP0232468A1 (de) 1987-08-19
JPS62146329A (ja) 1987-06-30
GR3000458T3 (en) 1991-06-28
ATE50305T1 (de) 1990-02-15
DE3545018C1 (de) 1986-08-28
DE3668930D1 (de) 1990-03-15
JPH0436219B2 (enrdf_load_stackoverflow) 1992-06-15

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