EP2288760A1 - Wear member connection device for a digging bucket - Google Patents

Wear member connection device for a digging bucket

Info

Publication number
EP2288760A1
EP2288760A1 EP09731426A EP09731426A EP2288760A1 EP 2288760 A1 EP2288760 A1 EP 2288760A1 EP 09731426 A EP09731426 A EP 09731426A EP 09731426 A EP09731426 A EP 09731426A EP 2288760 A1 EP2288760 A1 EP 2288760A1
Authority
EP
European Patent Office
Prior art keywords
pin
pocket
wear member
abutment portion
abutment
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
EP09731426A
Other languages
German (de)
French (fr)
Other versions
EP2288760B1 (en
Inventor
Tor Torgrimsen
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.)
Komatsu KVX LLC
Original Assignee
Komatsu KVX LLC
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 Komatsu KVX LLC filed Critical Komatsu KVX LLC
Publication of EP2288760A1 publication Critical patent/EP2288760A1/en
Application granted granted Critical
Publication of EP2288760B1 publication Critical patent/EP2288760B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • E02F9/2883—Wear elements for buckets or implements in general

Definitions

  • a wear member connector is provided. It is, more particularly, a wear member connector in which a wear member is connected to an adapter by means of a pin and pocket connection, in which the pin is in the pocket.
  • a wear member for example in the form of a replaceable tooth cap on a digging bucket, is often connected to the digging bucket by means of an adapter which is secured to the front piece of the digging bucket .
  • the adapter is generally formed with a pin which fits complementariIy into a pocket in the tooth cap.
  • the tooth cap is often moulded and fitted by hand on the adapter, on which it is typically held in place by means of a locking pin or similar.
  • the fit between the pin and the pocket may be relatively inaccurate, which leads to the tooth cap being movable on the adapter during work. Ingress of abrasive dust between the pin and pocket contributes to considerable wear maybe arising between the components .
  • the wear on the tooth cap is less unfavourable than wear on the adapter because the tooth cap can easily be replaced. Wear on the adapter, however, may lead to too poor a fit against the tooth cap or to breakage and need for replacement the adapter.
  • the replacing of a welded adapter may constitute half a day's work.
  • the invention has for its object to remedy or reduce at least one of the drawbacks of the prior art .
  • a .wear member connector in which a wear member is connected to an adapter by means of a pin and pocket connection, the pin being in the pocket, and the wear member be- ing characterized by the pin abutting against the pocket at a first abutment portion, a second abutment portion and a third abutment portion.
  • an adapter is meant, in this connection, any component which may be used to hold a wear member.
  • An aspect of the wear member connector is that when the pin is placed in the pocket, the second abutment portion is on the opposite side of the pin between the first abutment portion and the third abutment portion. Similarly, the second abutment portion is located axially between the first abut- ment portion and the third abutment portion relative to the direction of insertion of the pin into the pocket. Thereby, the pin rests steadily against the pocket.
  • the abutment portions are at different depths in the pocket, al- ternatively at different distances from the end portion of the pin.
  • a further aspect of the wear member connector is that at least one of the abutment portions is placed transversely to the direction of insertion of the pin into the pocket .
  • Yet another aspect of the wear member connector is that at least one of the abutment portions extends over more than one side of the pocket or pin. If the pin and pocket connection has a circular cross section, an abutment portion may extend along an arc of the circumference. If the pin and pocket connection is given a cornered, for example square, cross section, the abutment portion may extend over more than one side .
  • At least one of the abutment portions is divided.
  • An abutment portion may be divided by, for example, openings, recesses or hollow keys, or it may be divided for reasons of production.
  • each abutment portion is formed by an elevation on the pin or in the pocket.
  • protrusions in the pocket may contribute to a practical design of the wear member connector.
  • the wear member connector provided makes the wear member rest against its attachment at three defined portions, which enables steady and safe attachment of the wear member. If, ad- ditionally, the connector is formed with a conicity, strains during work will contribute to driving the wear member connector even harder together, so that wear between the components is substantially prevented.
  • Figure 1 shows a plan view of a wear member which is connected to a front piece by means of an adapter
  • Figure 2 shows a section I- I of figure 1
  • Figure 3 shows a section Ha- Ha of figure 2;
  • Figure 4 shows a section Hb-IIb of figure 2
  • Figure 5 shows a section Hc-IIc of figure 2.
  • Figure 6 shows in perspective a wear member, viewed from its mounting side.
  • the reference numeral 1 indicates a wear member in the form of a tooth cap which is connected to the pin 4 of an adapter 2.
  • the adapter 2 is secured to the front piece 6 of a bucket, not shown.
  • the pin 4 is given a shape like a frustum of a pyramid and has its smallest cross section at its projecting end portion 8.
  • the pin 4 is formed with a through cut-out 10 for a locking pin 12.
  • a stop screw 14 is threaded into the end portion 8.
  • the wear member 1 is formed with a pocket 16 which fits com- plementarily over the pin 4.
  • the wear member 1 is provided with through openings 18 which correspond to the cut-out 10 of the pin 4 in such a way that the locking pin 12, when in the openings 18 and cut-out 10, prevents the wear member 1 from being movable off the pin 4.
  • first abutment portion 20 Near the bottom of the pocket 16 is arranged a first abutment portion 20 in the form of a protrusion which builds out somewhat from a first side 22 and a second side 24 inside the pocket 16, see figure 3.
  • the first abutment portion 20 is ar- ranged to abut against the pin 4, whereas a third side 26 and a fourth side 28 have a clearance to the pin 4 in the section Ha-IIa.
  • a second abutment portion 30 Nearly halfway into the pocket 16 is arranged a second abutment portion 30 in the form of a protrusion which builds out somewhat from the third side 26 and fourth side 28 of the pocket 16, see figure 4.
  • the second abutment portion 30 is arranged to abut against the pin 4, whereas the first side 22 and the second side 24 have a clearance to the pin 4 in the section Hb-IIb.
  • a third abutment portion 32 in the form of a protrusion which builds out somewhat from the first side 22 and the second side 24 inside the pocket 16, see figure 5.
  • the third abutment por- tion 32 is arranged to bear against the pin 4, whereas the third side 26 and the fourth side 28 have a clearance to the pin 4 in the section IIc-IIc.
  • the pin 4 has abutments against the first side 22 and the second side 24 by the first abutment portion 20 and the third abutment portion 32, and against the third side 26 and the fourth side 28 by the second abutment portion 30.
  • This preferred embodiment provides a very steady and defined contact between the wear member 1 and the adapter 2.
  • the stop screw 14 has been built out somewhat from the end portion 8 to prevent the wear member 1 from being moved too far in on the pin 4 during work, which might lead to radial overloading of the wear member 1.

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)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Vehicle Body Suspensions (AREA)
  • Drawers Of Furniture (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)

Abstract

A wear member connection device in which a wear member (1) is connected to an adapter (2) by means of a pin and pocket connection in which a pin (4) is positioned in a pocket (16), and in which the pin (4) abuts against the pocket (16) at a first abutment portion (20), a second abutment portion (30) and a third abutment portion (32).

Description

WEAR MEMBER CONNECTION DEVICE FOR A DIGGING BUCKET
A wear member connector is provided. It is, more particularly, a wear member connector in which a wear member is connected to an adapter by means of a pin and pocket connection, in which the pin is in the pocket.
A wear member, for example in the form of a replaceable tooth cap on a digging bucket, is often connected to the digging bucket by means of an adapter which is secured to the front piece of the digging bucket .
According to the prior art, the adapter is generally formed with a pin which fits complementariIy into a pocket in the tooth cap. The tooth cap is often moulded and fitted by hand on the adapter, on which it is typically held in place by means of a locking pin or similar.
The fit between the pin and the pocket may be relatively inaccurate, which leads to the tooth cap being movable on the adapter during work. Ingress of abrasive dust between the pin and pocket contributes to considerable wear maybe arising between the components .
The wear on the tooth cap is less unfavourable than wear on the adapter because the tooth cap can easily be replaced. Wear on the adapter, however, may lead to too poor a fit against the tooth cap or to breakage and need for replacement the adapter. The replacing of a welded adapter may constitute half a day's work.
The invention has for its object to remedy or reduce at least one of the drawbacks of the prior art .
The object is achieved through features which are specified in the description below and in the claims that follow.
A .wear member connector is provided, in which a wear member is connected to an adapter by means of a pin and pocket connection, the pin being in the pocket, and the wear member be- ing characterized by the pin abutting against the pocket at a first abutment portion, a second abutment portion and a third abutment portion.
By an adapter is meant, in this connection, any component which may be used to hold a wear member.
An aspect of the wear member connector is that when the pin is placed in the pocket, the second abutment portion is on the opposite side of the pin between the first abutment portion and the third abutment portion. Similarly, the second abutment portion is located axially between the first abut- ment portion and the third abutment portion relative to the direction of insertion of the pin into the pocket. Thereby, the pin rests steadily against the pocket.
Yet another aspect of the wear member connector is that the abutment portions are at different depths in the pocket, al- ternatively at different distances from the end portion of the pin.
A further aspect of the wear member connector is that at least one of the abutment portions is placed transversely to the direction of insertion of the pin into the pocket . Yet another aspect of the wear member connector is that at least one of the abutment portions extends over more than one side of the pocket or pin. If the pin and pocket connection has a circular cross section, an abutment portion may extend along an arc of the circumference. If the pin and pocket connection is given a cornered, for example square, cross section, the abutment portion may extend over more than one side .
Yet another aspect of the wear member connector is that at least one of the abutment portions is divided. An abutment portion may be divided by, for example, openings, recesses or hollow keys, or it may be divided for reasons of production.
Yet another aspect of the wear member connector is that each abutment portion is formed by an elevation on the pin or in the pocket. For example, protrusions in the pocket may contribute to a practical design of the wear member connector.
The wear member connector provided makes the wear member rest against its attachment at three defined portions, which enables steady and safe attachment of the wear member. If, ad- ditionally, the connector is formed with a conicity, strains during work will contribute to driving the wear member connector even harder together, so that wear between the components is substantially prevented.
In what follows is described an example of a preferred em- bodiment which is visualized in the accompanying drawings, in which:
Figure 1 shows a plan view of a wear member which is connected to a front piece by means of an adapter;
Figure 2 shows a section I- I of figure 1; Figure 3 shows a section Ha- Ha of figure 2;
Figure 4 shows a section Hb-IIb of figure 2;
Figure 5 shows a section Hc-IIc of figure 2; and
Figure 6 shows in perspective a wear member, viewed from its mounting side.
In the drawings the reference numeral 1 indicates a wear member in the form of a tooth cap which is connected to the pin 4 of an adapter 2. The adapter 2 is secured to the front piece 6 of a bucket, not shown.
The pin 4 is given a shape like a frustum of a pyramid and has its smallest cross section at its projecting end portion 8. The pin 4 is formed with a through cut-out 10 for a locking pin 12. A stop screw 14 is threaded into the end portion 8.
The wear member 1 is formed with a pocket 16 which fits com- plementarily over the pin 4. The wear member 1 is provided with through openings 18 which correspond to the cut-out 10 of the pin 4 in such a way that the locking pin 12, when in the openings 18 and cut-out 10, prevents the wear member 1 from being movable off the pin 4.
Near the bottom of the pocket 16 is arranged a first abutment portion 20 in the form of a protrusion which builds out somewhat from a first side 22 and a second side 24 inside the pocket 16, see figure 3. The first abutment portion 20 is ar- ranged to abut against the pin 4, whereas a third side 26 and a fourth side 28 have a clearance to the pin 4 in the section Ha-IIa.
Nearly halfway into the pocket 16 is arranged a second abutment portion 30 in the form of a protrusion which builds out somewhat from the third side 26 and fourth side 28 of the pocket 16, see figure 4. The second abutment portion 30 is arranged to abut against the pin 4, whereas the first side 22 and the second side 24 have a clearance to the pin 4 in the section Hb-IIb.
Near the outer opening of the pocket 16 is arranged a third abutment portion 32 in the form of a protrusion which builds out somewhat from the first side 22 and the second side 24 inside the pocket 16, see figure 5. The third abutment por- tion 32 is arranged to bear against the pin 4, whereas the third side 26 and the fourth side 28 have a clearance to the pin 4 in the section IIc-IIc.
Thus, the pin 4 has abutments against the first side 22 and the second side 24 by the first abutment portion 20 and the third abutment portion 32, and against the third side 26 and the fourth side 28 by the second abutment portion 30. This preferred embodiment provides a very steady and defined contact between the wear member 1 and the adapter 2.
By means of discs 34, the stop screw 14 has been built out somewhat from the end portion 8 to prevent the wear member 1 from being moved too far in on the pin 4 during work, which might lead to radial overloading of the wear member 1.

Claims

P a t e n t c l a i m s
1. A wear member connection device in which a wear member
(1) is connected to an adapter (2) by means of a pin and pocket connection in which a pin (4) is in a pocket (16) , c h a r a c t e r i z e d i n that the pin (4) abuts against the pocket (16) at a first abutment portion (20) , a second abutment portion (30) and a third abutment portion (32) .
2. The device in accordance with claim 1, c h a r a c - t e r i z e d i n that when the pin (4) is placed in the pocket (16) , the second abutment portion (30) is on the opposite side of the pin (4) relative to the first abutment portion (20) and the third abutment portion (32) .
3. The device in accordance with claim 1, c h a r a c t e r i z e d i n that when the pin (4) is placed in the pocket (16) , the second abutment portion (30) is positioned axially between the first abutment portion (20) and the third abutment portion (32) relative to the direction of insertion of the pin (4) into the pocket (16) .
4. The device in accordance with claim 1, c h a r a c t e r i z e d i n that the abutment portions (20, 30, 32) are at different depths in the pocket (16) .
5. The device in accordance with claim 1, c h a r a c t e r i z e d i n that the abutment portions are placed at different distances from the end portion (8) of the pin (4) .
6. The device in accordance with claim 1, c h a r a c - t e r i z e d i n that at least one of the abutment portions (20, 30, 32) are positioned transversely to the direction of insertion of the pin (4) into the pocket (16) .
7. The device in accordance with claim 1, c h a r a c - t e r i z e d i n that at least one of the abutment portions (20, 30, 32) extends over more than one side (22, 24, 26, 28) of the pocket (16) or pin (4) .
8. The device in accordance with claim 1, c h a r a c t e r i z e d i n that at least one of the abutment portions (20, 30, 32) is divided.
9. The device in accordance with claim 1, c h a r a c t e r i z e d i n that each abutment portion (20, 30, 32) is formed by an elevation on the pin (4) or in the pocket (16) .
EP09731426A 2008-04-10 2009-04-02 Wear member connection device for a digging bucket Not-in-force EP2288760B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20081744A NO334868B1 (en) 2008-04-10 2008-04-10 Drawer wear unit comprising a wear part and an adapter
PCT/NO2009/000125 WO2009126045A1 (en) 2008-04-10 2009-04-02 Wear member connection device for a digging bucket

Publications (2)

Publication Number Publication Date
EP2288760A1 true EP2288760A1 (en) 2011-03-02
EP2288760B1 EP2288760B1 (en) 2013-04-03

Family

ID=40651542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09731426A Not-in-force EP2288760B1 (en) 2008-04-10 2009-04-02 Wear member connection device for a digging bucket

Country Status (3)

Country Link
EP (1) EP2288760B1 (en)
NO (1) NO334868B1 (en)
WO (1) WO2009126045A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9279231B2 (en) 2013-04-19 2016-03-08 Caterpillar Global Mining Llc Removable liner assembly for a dipper
CN106638759A (en) * 2016-12-23 2017-05-10 熊丽 Excavator dipper tooth assembly with improved connecting structure

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371437A (en) 1965-04-28 1968-03-05 Mid Continent Steel Casting Co Locking device for digger tooth
US6735890B2 (en) 2001-07-06 2004-05-18 Esco Corporation Wear assembly
FR2500030A2 (en) * 1981-02-16 1982-08-20 Poncin Andre IMPROVEMENTS ON TEETH OF MECHANICAL SHOVEL BUCKETS
US5909962A (en) 1997-11-26 1999-06-08 Caterpillar Inc. Tip assembly for an edge of an implement of a work machine
US6708431B2 (en) * 2001-12-03 2004-03-23 Hensley Industries, Inc. Excavating tooth assembly with rotatable connector pin structure
FR2846017B1 (en) * 2002-10-17 2005-02-11 Afe Metal DEVICE FOR CONNECTING COUPLING BETWEEN WEAR PARTS TO THE END OF TOOLS RECEPTACLES USED ON PUBLIC WORKS MACHINERY
US7032334B2 (en) * 2004-05-28 2006-04-25 Trn Business Trust System and method for coupling excavation equipment components

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009126045A1 *

Also Published As

Publication number Publication date
NO20081744L (en) 2009-10-12
EP2288760B1 (en) 2013-04-03
WO2009126045A1 (en) 2009-10-15
NO334868B1 (en) 2014-06-23

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