WO1999045211A1 - Systeme de dent - Google Patents

Systeme de dent Download PDF

Info

Publication number
WO1999045211A1
WO1999045211A1 PCT/SE1998/000366 SE9800366W WO9945211A1 WO 1999045211 A1 WO1999045211 A1 WO 1999045211A1 SE 9800366 W SE9800366 W SE 9800366W WO 9945211 A1 WO9945211 A1 WO 9945211A1
Authority
WO
WIPO (PCT)
Prior art keywords
tooth
locking element
retainer
aperture
tooth system
Prior art date
Application number
PCT/SE1998/000366
Other languages
English (en)
Swedish (sv)
Inventor
Kjell Karlsson
Original Assignee
Componenta Wear Parts Ab
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 Componenta Wear Parts Ab filed Critical Componenta Wear Parts Ab
Priority to PCT/SE1998/000366 priority Critical patent/WO1999045211A1/fr
Priority to AU70876/98A priority patent/AU7087698A/en
Priority to ZA9901668A priority patent/ZA991668B/xx
Priority to ARP990100879A priority patent/AR018138A1/es
Publication of WO1999045211A1 publication Critical patent/WO1999045211A1/fr

Links

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

Definitions

  • the present invention relates to a tooth system.
  • Such systems are used on excavators, amongst other things, in order to fill a dipper as efficiently as possible.
  • a tooth system consists of three parts, namely a tooth part with a recess, designed to receive a retainer, which is attached to the tool on which the tooth is to be used. When the tooth part and retainer are joined, there is a transversal aperture through both these units. A locking element is introduced into this aperture. There are a number of different types of locking elements and apertures designed to fasten the tooth as well as possible and to ensure that the service life of the tooth system is as long as possible.
  • the purpose of the present invention is to create a tooth system that has as long a service life as possible. How this is carried out is explained in the following section.
  • the desired longer service life is achieved by a locking mechanism that is roughly rectangular and has a top surface and a bottom surface that preferably are at an angle with each other.
  • the two surfaces are not level but have some degree of configuration.
  • the top surface and the bottom surface of the locking element are intended to concur with the aperture created by the two apertures in the tooth part and the central aperture in the retainer.
  • the aperture must also be rectangular and the top and bottom sides of the aperture have surfaces that concur with the surfaces of the locking element in such a way that, when the locking element is introduced into the aperture, its surfaces will concur with the upper and lower aperture surfaces of the tooth-part.
  • the apertures in the tooth walls are aimed roughly towards the pointed edge of the tooth.
  • the surfaces of the aperture and the locking element are such that, when they concur with each other, they are in complete contact with each other.
  • the surfaces are such that relative transposition is possible between the aperture and the locking element.
  • the most suitable surface to use for the aperture as well as for the locking element is a cog-shaped segment surface, where a cog segment in the aperture surfaces positioned one over the other concurs with a cog segment in the locking element.
  • the locking element has a cog segment with a width that can be as wide as the length of the locking element. It would also be possible to have cog segments only at each end of the locking element.
  • a suitable shape for a cog is with one completely transversal side and one inclined side. Having cogs of this type, enables the locking element and the tooth part to be repositioned one cog segment at a time in relation to each other and, because of the straight cog surface, the tooth part cannot move outwards.
  • the locking element To enable repositioning by one cog step, the locking element must be such that it incorporates two rectangular metal parts, the outer surfaces of which have cog segments as iong as the metal parts, which are parallel to each other and have between them an elastic parallelepipedic element, preferably made of rubber. A metal surface that is as long as the top and bottom parts of the locking element is fixed to one of the long sides of this elastic element. Stops, constituted by fillings in the respective cog spaces, can be provided in the tracks of the cog segments. This means that, when a locking element is introduced into an aperture through the tooth part and retainer, the locking element must be compressed so that the stop can get past the cog segment in the aperture of the tooth part and end up inside the cog element in the tooth part. In this way there is no possibility of the locking element leaving the aperture, as the stops on both sides block any axial movement
  • the elastic element is redist ⁇ ubbed and compressed between the perpendicular and both the parallel metal parts, which may be of steel.
  • a servo force is achieved which presses both the parallel metal parts with great force into the cog segment, which with great clamping force prevents the tooth from falling off.
  • the retainer has an external conical shape and the tooth part has a recess with an internal conical shape where the walls of the two cones are intended to concur with each other. It has been found advisable for the retainer to consist of two consecutive parts with different conicities, preferably with the greatest cone angle in the outer part of the retainer. Regarding the recess in the tooth part, there are, here as well, two consecutive parts with different conicities where, preferably, the cone angle is greatest in the inner part and the outer part has a smaller cone angle. In the transitions between conicities, the tooth part and the retainer have transitional sections that are not in contact with each other. The upper part of the recess in the tooth part should, preferably, have a difference in angle in relation to the retainer, whereby a pinching effect arises between the tooth part and the retainer. DESCRIPTION OF DRAWINGS
  • Figure 1 shows a tooth part in perspective
  • Figure 2 shows a retainer in perspective
  • Figure 3 shows the three component parts of a tooth system, namely tooth part, locking element and retainer
  • Figure 4 shows all three elements almost joined
  • Figure 5 illustrates different conicities in the retainer as well as the tooth part
  • Figure 6 shows a complete locking element
  • Figure 7 shows an exploded view of a locking element
  • Figure 8 shows an exploded view of a retainer
  • Figure 9 shows the elastic constituent part of a retainer
  • Figure 10 shows an element that can be either the upper or lower part of the locking element.
  • Figure 3 shows the component parts of a complete tooth system, namely a retainer 2, a tooth part 1 and a locking element 3.
  • a tooth part is shown and the rear part of the tooth part has a roughly rectangular cross section with four walls and a recess 4 for receiving a retainer.
  • the recess is conical from the rear part to the front part and is divided so that the conicity angle for the first part of the recess, counted from its open end, is smaller than for the bottom part of the recess.
  • the upper part of the recess can, furthermore, be somewhat deepened so as to be able to overcome different tolerances in the retainer.
  • Opposite walls in the tooth part each have an aperture 5 and 6.
  • the two apertures 5 and 6 are aimed towards the front part of the tooth and have approximately the same direction as the tooth itself.
  • the aperture is oblong and thus has two long walls and two short walls.
  • the long wails have been shaped as cog segments, where each cog has a preferably straight transversai part and an inclined, part, as shown in Figure 5.
  • Figure 2 shows a retainer which is intended to be joined in one way or another with its upper part to a suitable tool, joined, for instance, to the cutting edge of a dipper or some other implement.
  • the retainer 2 has a bottom part 7 which is conical and a top part 8 which also is conical.
  • the conicity angle is greater for part 8 than for part 7.
  • the retainer also has an aperture going through it which is oblong and the axial length of which is shorter than the axial length of the tooth part
  • Figure 3 shows the three parts necessary for a complete tooth system, namely the tooth part 1, the retainer 2 and the locking element 3.
  • the design of the locking element 3 is clearly shown in Figures 6, 7 and 8 as well as in Figures 9 and 10.
  • the locking element consists of an upper and a lower metal part, which on their outer surfaces have cog segments of a width corresponding to the length of the parts 15 and 16. These two parts are attached, for instance through vulcanization, to the element 14, which consists of an elastic material, preferably rubber.
  • the locking element has surfaces that are preferably completely transversal, it is possible to insert the locking element 3 into the aperture 5 only in one position, namely with the metal part 13 positioned downwards.
  • the retainer Before the locking element 3 is inserted into the aperture 5, the retainer is introduced into the tooth part so that the apertures 5, 6 and 10 are aligned with each other.
  • Figure 4 shows how the locking element 3 is inserted into the retainer 2 and tooth part 1.
  • the locking element 3 will be compressed slightly when the stops are in the aperture wall 5.
  • the elastic element will expand so that the cog-segment surfaces of the locking element and the corresponding surfaces on apertures 5 and 6 will be in contact with each other.
  • the tooth part 5 can be moved, in locked condition, onto the retainer 2 until the transversal parts of the cogs are in contact with each other, preventing any outward movement of the tooth in relation to the retainer.
  • the tooth part can be moved step by step so that the outer cone of the retainer comes into contact with the inner cone of the tooth part.
  • the present invention based on a locking element with cog segments and corresponding apertures also with cog segments, enables greater durability for a tooth system and also axial movement of the tooth step by step towards the retainer 2.

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)

Abstract

On utilise des systèmes de dent, notamment avec des excavatrices, pour augmenter les possibilités de fonctionnement du godet. Ce système est constitué par un dispositif de retenue (2) et par une partie dent (1) avec un évidement (4) permettant de l'assembler au dispositif de retenue (2). Lorsque l'on assemble le dispositif de retenue et la partie dent l'un à l'autre, il se forme un ouverture transversale (5, 6, 10) traversant les deux parties (1, 2), destinée à recevoir un élément de verrouillage (3). L'objet de la présente invention est d'améliorer le verrouillage entre le dispositif de retenue (2) et la partie dent grâce à l'ajout de segments crantés de part et d'autre de l'élément de verrouillage, ces segments crantés étant destinés à entrer en prise avec des segments crantés se trouvant dans les ouvertures (5, 6).
PCT/SE1998/000366 1998-03-02 1998-03-02 Systeme de dent WO1999045211A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/SE1998/000366 WO1999045211A1 (fr) 1998-03-02 1998-03-02 Systeme de dent
AU70876/98A AU7087698A (en) 1998-03-02 1998-03-02 Tooth arrangement
ZA9901668A ZA991668B (en) 1998-03-02 1999-03-02 Tooth arrangement.
ARP990100879A AR018138A1 (es) 1998-03-02 1999-03-02 Una disposicion de diente para balde de excavadora

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1998/000366 WO1999045211A1 (fr) 1998-03-02 1998-03-02 Systeme de dent

Publications (1)

Publication Number Publication Date
WO1999045211A1 true WO1999045211A1 (fr) 1999-09-10

Family

ID=20410119

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/000366 WO1999045211A1 (fr) 1998-03-02 1998-03-02 Systeme de dent

Country Status (4)

Country Link
AR (1) AR018138A1 (fr)
AU (1) AU7087698A (fr)
WO (1) WO1999045211A1 (fr)
ZA (1) ZA991668B (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032790A1 (fr) * 1980-01-16 1981-07-29 Esco Corporation Dispositif de verrouillage pour équipement d'excavation
SE504157C2 (sv) * 1994-03-21 1996-11-25 Componenta Wear Parts Ab Tandarrangemang; sammanfogning med sprint
WO1998022664A1 (fr) * 1996-11-15 1998-05-28 Componenta Wear Parts Ab Mecanisme a dents

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032790A1 (fr) * 1980-01-16 1981-07-29 Esco Corporation Dispositif de verrouillage pour équipement d'excavation
SE504157C2 (sv) * 1994-03-21 1996-11-25 Componenta Wear Parts Ab Tandarrangemang; sammanfogning med sprint
WO1998022664A1 (fr) * 1996-11-15 1998-05-28 Componenta Wear Parts Ab Mecanisme a dents

Also Published As

Publication number Publication date
ZA991668B (en) 1999-10-26
AU7087698A (en) 1999-09-20
AR018138A1 (es) 2001-10-31

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