EP0531603A1 - Dent composée pour machines de travaux publics - Google Patents

Dent composée pour machines de travaux publics Download PDF

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Publication number
EP0531603A1
EP0531603A1 EP91830568A EP91830568A EP0531603A1 EP 0531603 A1 EP0531603 A1 EP 0531603A1 EP 91830568 A EP91830568 A EP 91830568A EP 91830568 A EP91830568 A EP 91830568A EP 0531603 A1 EP0531603 A1 EP 0531603A1
Authority
EP
European Patent Office
Prior art keywords
crown
holder
crown holder
snug
key
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.)
Withdrawn
Application number
EP91830568A
Other languages
German (de)
English (en)
Inventor
Giovanni Esti
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.)
METALLURGICA VALCHIESE Srl
Original Assignee
METALLURGICA VALCHIESE Srl
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 METALLURGICA VALCHIESE Srl filed Critical METALLURGICA VALCHIESE Srl
Publication of EP0531603A1 publication Critical patent/EP0531603A1/fr
Withdrawn legal-status Critical Current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
    • E02F9/2833—Retaining means, e.g. pins
    • E02F9/2841—Retaining means, e.g. pins resilient
    • 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

Definitions

  • the present invention relates to earthmovers such as excavators, shovels and the like, and more particularly to a composite tooth formed from a crown and crown holder for such machines.
  • the crown is usually chocked onto the crown holder or tooth and is fixed through a pin or key, the crown holder having a wedge-shaped part which connects to an appropriately shaped cavity formed in the crown.
  • all the methods for coupling crowns and crown holders or teeth available at present are not able to exclude certain movements of the crown on and in respect to the crown holder which inevitably lead to its wearing. This therefore alters the coupling conditions and renders the crown holder unsuitable for holding a new crown correctly.
  • Other fixing methods ensure a rigid blocking of the crown to the crown holder but do not permit an easy disassembly. So, the extraction of the fixing means is infact full of problems and difficult thus preventing a simple substitution of the crown.
  • the object of the present invention is to eliminate these problems and inconveniences through a new way of coupling and fixing the crown to the crown holder or tooth designed to prevent undue movements of the crown, to minimize the wearing of the surfaces which touch the two elements and to automatically recuperate space both in the coupling and clearance resulting in the minimum wear which can take place.
  • Fig. 1 therefore represents the crown holder (10), the crown (11) and the elastic key (12) designed to form a composite tooth which is to be applied to the blade of earthmovers.
  • the crown holder (10) can have an attachment shank (10a) being of any configuration according to the type and model of the machine to which the tooth is to be fitted.
  • the crown (11) can also vary in shape depending on its destination.
  • the free end of the crown holder (10) is tapered (Fig. 1 and 2) so as to form a snug (13) whose sides have at least two sloped shoulders (14) which diverge from each other starting from the snug (13) each at an angle which can vary within a wide range, for example from 20 to 60°, but preferably at about 45°.
  • the crown holder (10) also has a transversal through hole (15) being of a general oval section in the direction of the length of the element, in other words in the direction of its coupling to the crown. Said hole (15) is in an intermediate position between the shoulders (14) and the attachment shank (10a) and can be of an elliptic shape or also formed from two holes of different intersection diametres.
  • the crown (11) has a cavity (11a) designed to receive the crown holder (10) obviously less the attachment shank (10a).
  • Such a cavity (11a) of the crown (11) (Figs. 3 and 4) has the same shape of the crown holder (10) and more precisely a recess (16) is formed on the bottom of said cavity having two slopes (17) on its sides. Said slopes diverge from the recess (16) towards the cavity opening.
  • the bottom recess (16) is of such a shape and size so as to hold the snug (13) of the crown holder (10), whilst the slopes (17) are placed and angled so as to match the shoulders (14).
  • Even the crown (11) has a transversal through hole (18) with an oval section in a transversal direction similar to the hole (15) of the crown holder (10), the transversal holes (15, 18) being aligned when the crown holder and crown are coupled.
  • the elastic key (12) which is already known, is contractible and expandable in a transveral direction. It has a head with a blocking lug (12a) on each of its opposite ends.
  • the crown holder (10) is fixed to the blade of the desired machine and the crown (11) is chocked onto the crown holder and blocked through the loaded key.
  • the coupling (Figs. 5 and 6) is secured by the key (12) which is prevented from accidentally withdrawing from the holes (15, 18) by its blocking lugs (12a) which rest against the sides of the crown holder and in such a way that the heads of the key are enclosed in the holes (18) of the crown.
  • the snug (13) is inserted into the bottom recess (16) (Figs. 5 and 6) it helps to prevent the lateral movements of the crown (11) on the crown holder.
  • the preloaded elastic key (12) keeps the crown tightly chocked to the crown holder making the slopes (17) inside the crown continuously rest against the sloped shoulders (14) at the sides of the snug of the crown holder. Due to the oval-shaped holes (15, 18) the crown, which is constantly stressed by the elastic key, slightly slides towards the shank of the crown holder. Said elastic key tends to "pull" the crown on the crown holder therefore recuperating any clearance in the coupling and other causes of wear. The crown therefore always results as being correctly centred and chocked on the crown holder positively and constantly resting against the sloped shoulders (14). The stress to which the crown is subjected is then mainly unloaded on said sloped shoulders without engaging the key. The function of this key is therefore limited to maintain the assembly of the two elements and is easily extractable through the drift or other means, at any moment in order to change the crown.

Landscapes

  • 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)
EP91830568A 1991-09-13 1991-12-17 Dent composée pour machines de travaux publics Withdrawn EP0531603A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS910097 1991-09-13
ITBS910097A IT1252500B (it) 1991-09-13 1991-09-13 Dente composito per macchine movimento terra

Publications (1)

Publication Number Publication Date
EP0531603A1 true EP0531603A1 (fr) 1993-03-17

Family

ID=11344679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91830568A Withdrawn EP0531603A1 (fr) 1991-09-13 1991-12-17 Dent composée pour machines de travaux publics

Country Status (2)

Country Link
EP (1) EP0531603A1 (fr)
IT (1) IT1252500B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995025851A1 (fr) * 1994-03-21 1995-09-28 Componenta Tools Ab Ensemble dent
WO1996008612A1 (fr) * 1993-09-08 1996-03-21 Keech Castings Australia Pty. Limited Procede et dispositif de fixation hydraulique
WO2000032881A1 (fr) * 1998-12-02 2000-06-08 Metalogenia, S.A. Perfectionnements apportes aux elements d'ancrage et de retenue destines aux machines des travaux publics et analogues
WO2013030334A1 (fr) * 2011-09-01 2013-03-07 Afe Metal Système mécanique comprenant un dispositif de liaison entre une pièce d'usure et son support, godet d'engin de travaux publics et procédé de mise en oeuvre d'un tel système
CN105332400A (zh) * 2015-11-19 2016-02-17 如皋市华阳铝制品有限公司 一种新型缓冲式挖掘机齿座与斗齿的组合装置
US20170152647A1 (en) * 2015-12-01 2017-06-01 Srj, Inc. Flex pin
CN108980168A (zh) * 2017-05-31 2018-12-11 Srj股份有限公司 柔性销

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2204741A1 (fr) * 1972-10-31 1974-05-24 Poclain Sa
WO1982003235A1 (fr) * 1981-03-16 1982-09-30 Radigan Michael T Ensemble de goujons de retenue pour engins de terrassement
US4516340A (en) * 1983-06-06 1985-05-14 Launder Richard L Attachment assembly for excavation teeth

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2204741A1 (fr) * 1972-10-31 1974-05-24 Poclain Sa
WO1982003235A1 (fr) * 1981-03-16 1982-09-30 Radigan Michael T Ensemble de goujons de retenue pour engins de terrassement
US4516340A (en) * 1983-06-06 1985-05-14 Launder Richard L Attachment assembly for excavation teeth

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996008612A1 (fr) * 1993-09-08 1996-03-21 Keech Castings Australia Pty. Limited Procede et dispositif de fixation hydraulique
US5926982A (en) * 1993-09-08 1999-07-27 Keech Castings Australia Pty. Limited Hydraulic fastening device and method
WO1995025851A1 (fr) * 1994-03-21 1995-09-28 Componenta Tools Ab Ensemble dent
AU686781B2 (en) * 1994-03-21 1998-02-12 Componenta Wear Parts Aktiebolag Tooth arrangement
US5802752A (en) * 1994-03-21 1998-09-08 Componenta Wear Parts Ab Tooth arrangement for excavator
WO2000032881A1 (fr) * 1998-12-02 2000-06-08 Metalogenia, S.A. Perfectionnements apportes aux elements d'ancrage et de retenue destines aux machines des travaux publics et analogues
ES2146186A1 (es) * 1998-12-02 2000-07-16 Metalogenia Sa Perfeccionamientos en los elementos de anclaje y retencion destinados a maquinaria de obras publicas y similares.
JP2002531728A (ja) * 1998-12-02 2002-09-24 メタロジェニア，エス．エー． 土木工事等の機械のための改良されたロック及び保持要素
WO2013030334A1 (fr) * 2011-09-01 2013-03-07 Afe Metal Système mécanique comprenant un dispositif de liaison entre une pièce d'usure et son support, godet d'engin de travaux publics et procédé de mise en oeuvre d'un tel système
FR2979646A1 (fr) * 2011-09-01 2013-03-08 Afe Metal Systeme mecanique comprenant un dispositif de liaison entre une piece d'usure et son support, godet d'engin de travaux publics et procede de mise en oeuvre d'un tel systeme
CN103781974A (zh) * 2011-09-01 2014-05-07 萨弗金属公司 包括用于磨损部分和其支撑件之间的连接的装置的机械系统、重型工程机械铲斗及实施所述系统的方法
CN103781974B (zh) * 2011-09-01 2016-01-20 萨弗金属公司 包括用于磨损部分和其支撑件之间的连接的装置的机械系统、重型工程机械铲斗及实施所述系统的方法
CN105332400A (zh) * 2015-11-19 2016-02-17 如皋市华阳铝制品有限公司 一种新型缓冲式挖掘机齿座与斗齿的组合装置
US20170152647A1 (en) * 2015-12-01 2017-06-01 Srj, Inc. Flex pin
US9840829B2 (en) * 2015-12-01 2017-12-12 Srj, Inc. Flex pin
CN108980168A (zh) * 2017-05-31 2018-12-11 Srj股份有限公司 柔性销
US10400427B2 (en) * 2017-05-31 2019-09-03 Srj, Inc. Flex pin

Also Published As

Publication number Publication date
ITBS910097A1 (it) 1993-03-13
ITBS910097A0 (it) 1991-09-13
IT1252500B (it) 1995-06-19

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