EP0203315A2 - Dents destinées pour un dispositif d'engins de terrassement - Google Patents

Dents destinées pour un dispositif d'engins de terrassement Download PDF

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Publication number
EP0203315A2
EP0203315A2 EP86104482A EP86104482A EP0203315A2 EP 0203315 A2 EP0203315 A2 EP 0203315A2 EP 86104482 A EP86104482 A EP 86104482A EP 86104482 A EP86104482 A EP 86104482A EP 0203315 A2 EP0203315 A2 EP 0203315A2
Authority
EP
European Patent Office
Prior art keywords
tooth
members
passage
adapter
fastening means
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.)
Granted
Application number
EP86104482A
Other languages
German (de)
English (en)
Other versions
EP0203315A3 (en
EP0203315B1 (fr
Inventor
George Paizes
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.)
Gamma Lock Pty Ltd
Original Assignee
Gamma Lock Pty Ltd
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 ZA86585A external-priority patent/ZA86585B/xx
Application filed by Gamma Lock Pty Ltd filed Critical Gamma Lock Pty Ltd
Priority to AT86104482T priority Critical patent/ATE60387T1/de
Publication of EP0203315A2 publication Critical patent/EP0203315A2/fr
Publication of EP0203315A3 publication Critical patent/EP0203315A3/en
Application granted granted Critical
Publication of EP0203315B1 publication Critical patent/EP0203315B1/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
    • E02F9/2833—Retaining means, e.g. pins
    • E02F9/2841—Retaining means, e.g. pins resilient

Definitions

  • teeth There are two main types of such teeth. There is a tooth which is largely hollow and which releasably fits on to an adapter in the form of a point. Such a tooth is hereinafter called a “hollow tooth”. A second type of tooth has a solid working end and a root section that is secured to, for example, a bucket. Such a tooth is hereinafter called a “solid tooth”.
  • a hollow tooth is generally fitted on to the adapter and is secured thereto by a fastener comprising a pin which passes through the point and is engaged by apertures in ears on the tooth which run alongside the adapter.
  • a fastener comprising a pin which passes through the point and is engaged by apertures in ears on the tooth which run alongside the adapter.
  • Solid teeth are generally in one of two forms.
  • the root section is divided horizontally into two root parts between which is received the bucket and the root section is secured to the bucket by suitable fastener.
  • This type of tooth is hereinafter called a "split solid tooth”.
  • a second form of solid tooth has a root section which fits into an adapter, in the form of a tooth socket, secured to the bucket.
  • the root section has a transverse passage therethrough, and the adapter has a pair of side apertures which, when the root section is homed in the adapter, register or substantially register with the passage.
  • the fastener is located within the passage and projects into the said side apertures to retain the root section within the tooth socket, the latter being the outer part surrounding the root section which constitutes the inner part.
  • the latter tooth is hereinafter referred to as "a shanked solid tooth”.
  • the fastening means comprises a rubber/steel key that secures the root section to the socket.
  • This key comprises two steel members extending over the entire length of the key and having an elastomeric element therebetween. The key is wider than the side apertures and passage in the root. It is compressing the elastomeric element hammered into the side apertures through the socket and through the passage in the root. When the tooth has worn down, the key is hammered out and the stub of the tooth can be removed.
  • Another system for securing a shanked solid tooth the bucket comprises a set of pins and tubes.
  • a disadvantage of both the systems descriibed in the precee3ing two paragraphs is that the side apertures and the passage must be accurately dimensioned. Furthermore it is necessary to have at least one loose part in addition to the tooth. This can cause difficulties in the field as it may be that the con- tracter has teeth to affix to an earth moving apparatus but does not have available the necessary keys. It is an object of the invention to provide a more satisfactory fastener key for use with teeth.
  • a fastener means for a tooth comprising a pair of fastening members that are mounted to pivot relative to one another from an inner position to an outer position and biassing means, preferably in the form of an elastomeric block, preferably comprising rubber or neoprene, to biass the members apart into their outer positions.
  • biassing means preferably in the form of an elastomeric block, preferably comprising rubber or neoprene
  • the inner part When the fastening members are in the inner position, the inner part can be received in the outer part and when the fastening members are adjacent openings in the outer part, they will be biassed outwardly into the outer position so that one engages the sides of the openings and the other will act against a wall in the passage thereby to secure the inner part into the outer part.
  • the fastener further comprises an abutment member against which the said fastening members butt in such a way as to be able to pivot relative thereto, preferably the said members are provided with rounded ends and preferably the said abutment member has rounded recesses within which the said ends are received so as to be able to pivot as aforesaid.
  • the said fastening members preferably are provided with weaknesses so that when struck with a blow substantially at right angles thereto the members will tend to break so as to facilitate their removal of the fastener from the tooth and adapter.
  • Each fastening member which preferably comprises a rounded inner end preferably has a generally triangular projectionwith an inclined forward portion, the said weakness being provided near the rounded end.
  • the elastomeric element is preferably generally in the shape of the frustum of a triangle. It is preferably bonded to the said members preferably by being vulcanized thereto.
  • a shanked solid tooth having a working end and a root section having therethrough a transverse passage, and within the passage a fastener as set forth above, the arrangement being such that when the said fastening members are in their inner position, they are wholly or substantially wholly contained within the passsage.
  • the said root section is provided with holding means for holding the fastener within the passage.
  • the holding members may comprise a pair of retaining walls at the side wall of the passage remote from the working end of the tooth and preferably one end of each of the fastening members is located within the retaining walls, the biassing means tending to biass the fastening members to pivot relative to one another about the said ends into the said outer positions.
  • the retaining means comprises a projection from the passage and a recess in the elastomeric block into which the projection is received to prevent movement of the fastener transversely to the passage.
  • the fastener means further comprises an abutment member which is slidably located against the side of the passage remote from the working end and against which the said members butt in such a way as to be able to pivot relative to each other.
  • FIG. 1 and 2 there is shown a solid shanked tooth 10, an adapter in the form of a tooth socket 12 for receiving the tooth 10 as wilt be described, and a fastener 14 for retaining the tooth 10 in the adapter.
  • the adapter socket 14 comprises a "U"-shaped member, the arms 16 of which are welded to the bottom plate 18 of a bucket (not shown).
  • the tooth 10 has a spade-shaped working end 20 terminating in an inner or rear wall 20a from which extends a root section 22 which is received in the socket 14.
  • the root section 22 has a transverse passage 24 therethrough.
  • the passage 24 is defined by a recess having a base 26 and transversely extending plane side walls 28a and 28b.
  • the passage is of increased width at its upper ends to form aligned platforms 30 having end walls 32.
  • a steel plate 34 rests on these platforms 30 to form a cover for the passage 24.
  • the adapter socket 14 has a pair of aligned side apertures 36 formed by "U"-shaped cut-outs in the arms 16 and the plate 18.
  • the side apertures 36 have longitudinally spaced end walls 38 and 40.
  • the inner corner 39 of each wall 38 is rounded for the purpose which will become apparent.
  • the fastener means 12 comprises a pair of aluminium fastening members 42, an elastomeric, rubber or neoprene, trapezoidal block 44, and an abutment plate 46.
  • the block 44 is in the shape of the frustum of an isosocles triangle. It serves as a biassing means for the members 42 as will be described.
  • the abutment piece 46 which runs along the length of and slidably abuts against the side wall 28a of the passage 24 remote from the working end 20 of the tooth 10.
  • the fastening members 42 run generally in the direction of the root portion 22.
  • the ends 48 of the fastening members 42 adjacent the abutment plate 46 are rounded and are received within semi-circular recesses 50 in the abutment plate 46.
  • the outer sides of the fastening members 42 have generally triangular projections 52 in shape each having its forward end wall 54 which is slightly rounded and which is inclined as will be described for the purposes that shall emerge and straight rear side wall 55.
  • the inner surfaces 58 of the fastening members 42 are flat over most of their length and butt against the sides of the block 46 which are vulcanized to these surfaces. At the junctions 59 between the ends 48 and the projections 52 and the ends 48 and the surfaces 58 only a very small radius or none at all, exists.
  • a low narrow longitudinally extending stud 60 is centrally located standing up from the base 26 of the passage 24.
  • a longitudinal groove 62 is provided in the block 44 and this receives the stud 60. The engagement of the stud 60 in the groove 62 prevents the fastener 12 from moving transversely in the passage 24.
  • the elastomeric block 44 serves as a biassing means tending to biass the fastening members 42 to pivot relative to one another about their rounded ends 50 each from an inner position (shown in chain lines in Figure 1) when the block is compressed, to an outer position (shown in full lines) when the block 44 is in its rest position.
  • fastening members 42 When the fastening members 42 are in their inner positions, they lie substantially wholly within the passage 24.When the fastening members 42 are in their outer positions, the projections 52 project beyond the passage 24 to lie between the end walls 38 and 40 of the side apertures 36. The forward ends of the fastening members 42 however are wholly contained with the passage 24.
  • each projection 52 engages the wall 40 of the aperture closer to the working end 20 of the tooth.
  • the tooth 10 can easily be fitted into the socket 12 by feeding the root section 22 into the mouth 64 of the socket 12 until the rear walls 55 of the projections 52 engage the mouth. Further inward pressure will cause the walls 55 to swing the fastening members 42 inwards compressing the block 44 so that the fastening members 42 move into their inner positions enabling the root portion 22 to move into the socket 12.
  • the projection 52 will be opposite the apertures 36.
  • the block 44 will now biass the fastening members 42 outwardly into their outer positions so that the projections 52 enter the apertures 36 and the front walls 54 engage the rounded inner edge 39 of the end wall 38.
  • the root portion 22 will now be firmly held in place in the socket 12, rearward movement being inhibited by the engagement of the rear wall 20a of the working end 20 with the socket 12 and forward movement being inhibited by the engagement of the walls 54 of the fastening members 42 and the walls 38.
  • any resultant force tending to remove the root portion 22 from the socket 12 will run directly along the length of each fastening member 42 through the centre of the portion 48 (or slightly inside it) on to the abutment plate 46.
  • Very substantial compressive forces, which are in excess of any forces which would normally be encountered in practice, can thus be absorbed by the fastening members 42 so that the possibility of the tooth 10 being pulled out of the socket 16 is virtually non-existant.
  • each of the front walls 54 and the rounded shape of the end wall 38 are such that forces emanating from the end wall 38 will not tend to pivot the fastening members 42 either inwardly or outwardly but will only be conveyed directly down the length of the fastening members as mentioned above.
  • the tooth 10 When the working end 20 of the tooth 10 has worn down, the tooth 10 must be taken out of the socket 14. To do this, the fastener 14 must be removed which is effected by a sharp hammer blow being struck against the abutment plate 46 transversely the root section. This will tend to move the abutment plate 46 relative to the fastening members 42 and in turn to cause these to fracture along the lines of weakness 56. This is ensured because of the narrow neck and the sharp junctures 59 which latter form stress points. Also the elastomeric block 44 will tend to tear along a continuation of the groove 62. When this happens, the parts of the fastener 14 can simply be pushed out of the pass age 26. The root portion 22 of the tooth 10 can now be removed from the socket 12, possibly with the assistance of a hammer blow on the inner end 68 of the root portion 22. A new tooth is now attached in the manner described above.
  • a tooth 68 is provided wherein the abutment plate is omitted.
  • the rounded ends 70 of the fastener members 72 butt directly against the side wall 74 of the root section 76, which wall 74 is remoted from theworking end of the tooth 68.
  • a stud 78 which is similar to but larger than the stud 60 holds the fastener in position. This stud 78 can be broken on striking the fastener with a hammer and further blows will move it from the passage 76.
  • the projection 60 from the base of the passage is omitted and narrow rims 82 from the side wall 84 bear against the rounded ends 86 of the fastening members 88.
  • the rims 82 or one of them will break off when the fastener 88 is struck by a hammer blow as decribed above to permit removal of the fastener.
  • teeth 68 and 80 are identical to tooth 10 other than for the features set out above.
  • a hollow tooth 90 has a hollow rear end 92 in which is received an adapter 94 in the form of a point.
  • a transverse passage 96 is provided in through the adapter and in this is received a fastener 98.
  • the fastener 98 is a separate loose item but which is substantially identical to the fastener 12 including fastening members 100, having outer projections 102, and an elastomeric block 104 therebetween to which the members are vulcanized.
  • the rounded ends of the members 100 are received in rounded recesses in an abutment plate 106.
  • the inner end of the block 104 is also vulcanised to the abutment plate 106 thus creating a complete unit which holds together during normal handling.
  • the tooth 90 has ears 110 which lie on either side of the adapter 94.
  • Each ear 110 has an aperture 112 which, when the tooth 90 is homed on to the adapter 94, is aligned with the passage 96.
  • the tooth has internal grooves extending from the ears 110 to the apertures 112, to receive the projections 102 as will be described.
  • the fastener 98 is first placed in the passage 96 and roughly centralised therein.
  • the tooth 90 is now fitted on to the adapter 94 until grooves 114 engage the projections 102. Further pressure will compress the block 104 moving the fastening members 102 into their inner positions until the tooth 90 is homed on the adapter 94. Now the projections spring out under the bias of the block 104 to engage the apertures 112 and to hold the tooth 90 on the adapter 94. Removal of the fastener 98 is as described with reference to Figures 1 and 2.
  • each of the abovedescribed teeth of the invention can be easily fitted to its adapter. It can be easily removed therefrom as described above when the working end is worn down. Once fitted to its adapter it is held by the fastener firmly to prevent to its removal therefrom.
  • the invention can be used with advantage on all sizes of teeth from those having a mass of 2 kg. to 70 kg. or even more.
  • fasteners will be positively held in the passage of the shanked solid teeth so that they cannot be removed therefrom inadvertently.
  • fastener can be readily removed as described above. This is because the fastening members break relatively easily and quickly because of two features. First the material of which the fasteners are formed, i.e. aluminium, has a high compressive strength but low strength in shear. Second, as the fastening members have necks or weaknesses, failure takes place relatively easily when a sharp force is applied thereto as described.
  • a single rim may engage in a central slot in the attached plate to hold the fastener in position.
  • Suitable means may be provided to hold the fastener in the passage of the point adapter in the embodiment of Figures 5 and 6.
  • This passage may be a groove on a surface of the adapter rather than a through passage.
  • the fastening members may comprise other material having high compressive strength, but low strength in shear.
  • the invention may also be used with drag line shovels and other ground engaging tools.

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)
  • Slide Fasteners (AREA)
EP86104482A 1985-04-03 1986-04-02 Dents destinées pour un dispositif d'engins de terrassement Expired - Lifetime EP0203315B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86104482T ATE60387T1 (de) 1985-04-03 1986-04-02 Zaehne zur verwendung an einem erdbewegungsgeraet.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
ZA852501 1985-04-03
ZA852501 1985-04-03
ZA856769 1985-09-04
ZA856769 1985-09-04
ZA86585A ZA86585B (en) 1985-04-03 1986-01-27 Teeth for use with earth moving equipment
ZA860585 1986-01-27

Publications (3)

Publication Number Publication Date
EP0203315A2 true EP0203315A2 (fr) 1986-12-03
EP0203315A3 EP0203315A3 (en) 1987-05-13
EP0203315B1 EP0203315B1 (fr) 1991-01-23

Family

ID=27420929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86104482A Expired - Lifetime EP0203315B1 (fr) 1985-04-03 1986-04-02 Dents destinées pour un dispositif d'engins de terrassement

Country Status (5)

Country Link
EP (1) EP0203315B1 (fr)
DE (1) DE3677056D1 (fr)
ES (1) ES8702556A1 (fr)
IL (1) IL78413A0 (fr)
NZ (1) NZ215680A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066135A1 (fr) * 1998-06-15 1999-12-23 Berkeley Forge And Tool, Inc. Benne excavatrice a dents interchangeables, bloquees par des coins
US6393738B1 (en) 1998-06-15 2002-05-28 Robert S. Bierwith Excavating bucket with replaceable wedge-locked teeth
US8393097B2 (en) 2006-08-16 2013-03-12 Caterpillar Inc. Ground engaging tool system
WO2013142130A1 (fr) * 2012-03-21 2013-09-26 Hensley Industries, Inc. Stabilisation d'adaptateur pour mâchoire de godet
US9057176B2 (en) 2011-06-28 2015-06-16 Caterpillar Inc. Retention system for a ground-engaging tool
AU2019235398B2 (en) * 2018-03-14 2022-08-04 Koch Solutions Gmbh Holding assembly of an excavator tooth, having a holder, for arranging on the bucket of a bucket-wheel excavator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2011340794B2 (en) * 2010-12-07 2015-11-12 Talon Engineering Sdn. Bhd Connection assembly
CA3240309A1 (fr) * 2021-12-22 2023-06-29 Talon Engineering Sdn Bhd Ensemble de verrouillage pour outils de mise en prise avec le sol

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635366A (en) * 1947-01-24 1953-04-21 Morgan D Hostetter Digger tooth construction
US2852874A (en) * 1954-06-15 1958-09-23 Electric Steel Foundry Co Digger point and locking mechanism therefor
US3106256A (en) * 1962-01-08 1963-10-08 Richard A Mcbride Excavating tooth structure
US3312004A (en) * 1964-06-01 1967-04-04 Thys Company Ripper tooth assembly
US3325926A (en) * 1964-03-09 1967-06-20 Mid Continent Steel Casting Co Digger tooth and assembly for an excavating apparatus
GB1215839A (en) * 1967-05-08 1970-12-16 Deloro Ugine Carbone Device for mounting a removable tip on a tip carrier and a tip carrier assembly including such a device
US3879867A (en) * 1968-12-04 1975-04-29 Bofors Ab Fastening means for retaining a digger tooth in a socket
DE2930804A1 (de) * 1979-07-28 1981-02-12 Karl Schwarzkopf Verriegelung fuer auswechselbare zahnspitzen von baggerzaehnen
US4433496A (en) * 1983-03-14 1984-02-28 Esco Corporation Locking device for excavating equipment

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635366A (en) * 1947-01-24 1953-04-21 Morgan D Hostetter Digger tooth construction
US2852874A (en) * 1954-06-15 1958-09-23 Electric Steel Foundry Co Digger point and locking mechanism therefor
US3106256A (en) * 1962-01-08 1963-10-08 Richard A Mcbride Excavating tooth structure
US3325926A (en) * 1964-03-09 1967-06-20 Mid Continent Steel Casting Co Digger tooth and assembly for an excavating apparatus
US3312004A (en) * 1964-06-01 1967-04-04 Thys Company Ripper tooth assembly
GB1215839A (en) * 1967-05-08 1970-12-16 Deloro Ugine Carbone Device for mounting a removable tip on a tip carrier and a tip carrier assembly including such a device
US3879867A (en) * 1968-12-04 1975-04-29 Bofors Ab Fastening means for retaining a digger tooth in a socket
DE2930804A1 (de) * 1979-07-28 1981-02-12 Karl Schwarzkopf Verriegelung fuer auswechselbare zahnspitzen von baggerzaehnen
US4433496A (en) * 1983-03-14 1984-02-28 Esco Corporation Locking device for excavating equipment

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066135A1 (fr) * 1998-06-15 1999-12-23 Berkeley Forge And Tool, Inc. Benne excavatrice a dents interchangeables, bloquees par des coins
US6216368B1 (en) 1998-06-15 2001-04-17 Robert S. Bierwith Excavating bucket with replaceable wedge-locked teeth
US6393738B1 (en) 1998-06-15 2002-05-28 Robert S. Bierwith Excavating bucket with replaceable wedge-locked teeth
US8393097B2 (en) 2006-08-16 2013-03-12 Caterpillar Inc. Ground engaging tool system
US8397405B2 (en) 2006-08-16 2013-03-19 Craig Harder Ground engaging tool system
US9057176B2 (en) 2011-06-28 2015-06-16 Caterpillar Inc. Retention system for a ground-engaging tool
WO2013142130A1 (fr) * 2012-03-21 2013-09-26 Hensley Industries, Inc. Stabilisation d'adaptateur pour mâchoire de godet
US8819967B2 (en) 2012-03-21 2014-09-02 Hensley Industries, Inc. Adapter stabilization structure for bucket lip
KR20140135761A (ko) * 2012-03-21 2014-11-26 헨슬리 인더스트리즈, 인코퍼레이티드. 버켓 립을 위한 어댑터 안정화 구조물
CN104204368A (zh) * 2012-03-21 2014-12-10 汉斯莱工业公司 用于铲斗唇缘的适配器稳定结构
AU2019235398B2 (en) * 2018-03-14 2022-08-04 Koch Solutions Gmbh Holding assembly of an excavator tooth, having a holder, for arranging on the bucket of a bucket-wheel excavator

Also Published As

Publication number Publication date
NZ215680A (en) 1988-07-28
DE3677056D1 (de) 1991-02-28
EP0203315A3 (en) 1987-05-13
ES8702556A1 (es) 1987-01-01
ES554083A0 (es) 1987-01-01
EP0203315B1 (fr) 1991-01-23
IL78413A0 (en) 1986-08-31

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