WO1998022664A1 - Tooth arrangement - Google Patents

Tooth arrangement Download PDF

Info

Publication number
WO1998022664A1
WO1998022664A1 PCT/SE1996/001481 SE9601481W WO9822664A1 WO 1998022664 A1 WO1998022664 A1 WO 1998022664A1 SE 9601481 W SE9601481 W SE 9601481W WO 9822664 A1 WO9822664 A1 WO 9822664A1
Authority
WO
WIPO (PCT)
Prior art keywords
parts
locking body
aperture
tooth arrangement
male
Prior art date
Application number
PCT/SE1996/001481
Other languages
French (fr)
Inventor
Per Ulf Torgny Quarfordt
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
Priority to AU12150/97A priority Critical patent/AU739857B2/en
Application filed by Componenta Wear Parts Ab filed Critical Componenta Wear Parts Ab
Priority to DK96943414.1T priority patent/DK0950139T3/en
Priority to EP96943414A priority patent/EP0950139B1/en
Priority to US09/284,996 priority patent/US6385871B1/en
Priority to AT96943414T priority patent/ATE452250T1/en
Priority to DE69638100T priority patent/DE69638100D1/en
Priority to PCT/SE1996/001481 priority patent/WO1998022664A1/en
Priority to CA002271753A priority patent/CA2271753C/en
Priority to ES96943414T priority patent/ES2334180T3/en
Priority to BR9612786-4A priority patent/BR9612786A/en
Priority to PT96943414T priority patent/PT950139E/en
Publication of WO1998022664A1 publication Critical patent/WO1998022664A1/en
Priority to HK00102422.4A priority patent/HK1025611A1/en

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 arrangement used in excavators, for example, attached to the lower edge of the bucket.
  • the tooth arrangement consists of two parts, one part being attached to the excavator bucket by welding or some other means, and constituting a male part.
  • the other part of the tooth arrangement which is to constitute the part actually working the ground is the female part.
  • the two parts are joined together and, when joined, produce a transverse aperture running through the arrangement.
  • a locking body is then placed in said aperture. It has been found that when the exchangeable working part of the tooth arrangement becomes worn, it becomes unstable due to the properties of the transverse aperture and the locking body.
  • the object of the present invention is to eliminate said instability and this is achieved by using an aperture composed of an intermediate part and two identical end parts of the same width, the intermediate part, however, having greater width.
  • a locking body is developed for this aperture, said body comprising two elongate parts located parallel with each other and having flat surfaces opposite each other.
  • the width of the locking body is adapted along its length to fit said aperture.
  • the two flat surfaces are provided with one or more outwardly directed spacers restricting the approach of the two flat surfaces.
  • the space between the two flat surfaces is filled with a resilient material such as vulcanized rubber. It has been found advantageous to provide each of the two parts of the locking body with a spacer at each end and a spacer between them. In this way the approach of the surfaces towards each other is restricted, thereby eliminating the drawback of an unstable working part of the tooth arrangement.
  • the tip of the male part prefferably has a cross section in the shape of a T, for the tip to be as stable as possible and for the innermost end of the female part to be designed to fit the tip of the male part so that the two parts assume a position in relation to each other which is as immovable as possible. Instability of the exchangeable part in relation to the fixed part is thus also reduced.
  • Figures 1-2 show a complete tooth arrangement viewed from two different directions
  • Figures 3-4 reveal the relationship between the locking body and the transverse aperture, certain parts of the exchangeable part having been removed
  • Figures 5-6 show the exchangeable part in the tooth arrangement
  • Figures 7-8 show the non-exchangeable part of the tooth arrangement
  • Figure 9 shows the locking body with resilient material
  • Figure 10 shows the locking body without resilient material
  • Figures 11-12 show the two fixed parts in the locking body
  • Figure 13 shows a cutter provided with tooth arrangements in accordance with the present invention
  • Figure 14 shows the aperture in the female part
  • Figure 15 shows the tip of the male part
  • FIGs 16-18 show the female and male parts joined together.
  • the drawings show a tooth arrangement 5 comprising a male part 2 intended to be welded to a cutter or the edge of an excavator bucket 6.
  • Said male part is provided with a tip 26 for insertion into an aperture 24 in the female part 1.
  • the female part 1 is a part for working the ground, which can be exchanged when it has become worn.
  • the male and female parts form an aperture 3 situated on each side of the inserted tip 26. Between these two apertures 3 is an intermediate aperture.
  • the two apertures 3 are identical and are arranged immediately opposite each other in two side walls of the female part. Between the two apertures the upper surface of the tip 26 of the male part 2 forms part of the intermediate aperture 25 and the remaining part of the intermediate aperture 25 is formed by the intermediate wall parts situated between the side walls of the female part 1.
  • the two apertures 3 are narrower than the aperture 25.
  • the apertures 3 are formed in the wall parts 22 and 23.
  • a locking body 4 is placed in the aperture 3 and 25, this body comprising two metal parts 7 and 8, each having opposing flat surfaces.
  • Each part 7 and 8 is provided with an intermediate part 9 and 10, respectively, and two end parts 11 , 12 and 13, 14, respectively.
  • the two flat surfaces are provided with spacers.
  • the part 7 has spacers 16 and 17 at its ends 11 and 12 and a spacer 15 at its intermediate part 9.
  • the space between the surfaces of the bar- like parts shown in Figure 10 is filled with a resilient material which may consist of vulcanized rubber.
  • the locking body 4 shown in Figure 9 can thus be influenced in such a way that both flat surfaces of the parts 7 and 8 can move towards and away from each other. However, the parts 7 and 8 can never approach each other so far as to come into contact. The spacers ensure that, at maximum compression, the two flat surface will still be a certain distance from each other.
  • the two parts 7 and 8 will be pressed together so that the locking body can be inserted through the aperture 3.
  • the two parts 7 and 8 will move apart so that the intermediate part of the locking body adjusted to the aperture 25 and the ends to the apertures 3.
  • the tip 26 of the male part has a cross section in the form of a T and that the cross section has been made as solid as possible. This can be achieved, for instance, by making the upright of the T as long as possible and as wide as possible and suiting the innermost end 24 of the aperture of the female part to the tip 26 of the male part so that the walls of the female part at the tip of the male part abut the tip of the male part as tightly as possible.
  • the tip of the male part has a cross section in the form of a T and the innermost part of the aperture in the female part is shaped to fit this T- shaped cross section it is obvious that the transverse parts of the bar of the T will be clamped between two surfaces inside the innermost part of the female part and the actual tooth can be worn rather considerably from below without it falling off the male part.
  • Figures 14-18 show the actual core of the tooth arrangement, i.e. both attachment parts to a cutter and the tooth part itself have been removed.
  • the actual core part can be used in any type of attachment part and together with any type of tooth part.
  • the Figures thus show only the region of the tooth arrangement containing the tip of the male part and the aperture of the female part, and the transverse aperture with locking body.
  • the male part 26 has a cross section in the form of a large T.
  • the cross section thus has an upright and two outwardly directed cross bars which may be considered to form a yoke.
  • the lower side of each cross bar is machined in such a way as to acquire the character of an inclined surface forming an angle with the centre line of the two bars in such a way that the surface has a shorter distance to said centre line at the upright and a longer distance at the outermost end of the bar.
  • the interior of the female body is shaped correspondingly so that when male and female parts are joined these inclined surfaces will function as a locking device for the male and female body, thereby allowing increased wear on the actual tooth from below, without the male and female parts becoming separated from each other.
  • These two inclined surfaces can of course be replaced with other types of surfaces filling the same function, i.e. preventing the male and female parts becoming separated from each other due to wear.

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)
  • Gears, Cams (AREA)
  • Massaging Devices (AREA)
  • Shovels (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

At their lower edge (6) excavators are provided with a tooth arrangement consisting of two parts (1 and 2), one part (2) being attached to the bucket (6) and the other part (1) being exchangeable. The two parts (1 and 2) are held together by means of a male and female relationship and a transverse aperture (3 and 25) with a locking body (4). When the exchangeable part (1) becomes worn it may start to become unstable. The object of the present invention is to eliminate this drawback and this is achieved in that the locking body (4) comprises two opposing flat surfaces, provided with one or more spacers (15-20) intended to restrict approach of the two surfaces towards each other.

Description

TOOTH ARRANGEMENT
The present invention relates to a tooth arrangement used in excavators, for example, attached to the lower edge of the bucket. The tooth arrangement consists of two parts, one part being attached to the excavator bucket by welding or some other means, and constituting a male part. The other part of the tooth arrangement which is to constitute the part actually working the ground is the female part. The two parts are joined together and, when joined, produce a transverse aperture running through the arrangement. A locking body is then placed in said aperture. It has been found that when the exchangeable working part of the tooth arrangement becomes worn, it becomes unstable due to the properties of the transverse aperture and the locking body.
The object of the present invention is to eliminate said instability and this is achieved by using an aperture composed of an intermediate part and two identical end parts of the same width, the intermediate part, however, having greater width. A locking body is developed for this aperture, said body comprising two elongate parts located parallel with each other and having flat surfaces opposite each other. The width of the locking body is adapted along its length to fit said aperture. The two flat surfaces are provided with one or more outwardly directed spacers restricting the approach of the two flat surfaces. The space between the two flat surfaces is filled with a resilient material such as vulcanized rubber. It has been found advantageous to provide each of the two parts of the locking body with a spacer at each end and a spacer between them. In this way the approach of the surfaces towards each other is restricted, thereby eliminating the drawback of an unstable working part of the tooth arrangement.
It is advisable for the tip of the male part to have a cross section in the shape of a T, for the tip to be as stable as possible and for the innermost end of the female part to be designed to fit the tip of the male part so that the two parts assume a position in relation to each other which is as immovable as possible. Instability of the exchangeable part in relation to the fixed part is thus also reduced.
The present invention will be described in more detail with reference to the accompanying drawings, in which
Figures 1-2 show a complete tooth arrangement viewed from two different directions, Figures 3-4 reveal the relationship between the locking body and the transverse aperture, certain parts of the exchangeable part having been removed, Figures 5-6 show the exchangeable part in the tooth arrangement, Figures 7-8 show the non-exchangeable part of the tooth arrangement, Figure 9 shows the locking body with resilient material,
Figure 10 shows the locking body without resilient material,
Figures 11-12 show the two fixed parts in the locking body, Figure 13 shows a cutter provided with tooth arrangements in accordance with the present invention, Figure 14 shows the aperture in the female part,
Figure 15 shows the tip of the male part, and
Figures 16-18 show the female and male parts joined together.
The drawings show a tooth arrangement 5 comprising a male part 2 intended to be welded to a cutter or the edge of an excavator bucket 6.
Said male part is provided with a tip 26 for insertion into an aperture 24 in the female part 1. The female part 1 is a part for working the ground, which can be exchanged when it has become worn. The male and female parts form an aperture 3 situated on each side of the inserted tip 26. Between these two apertures 3 is an intermediate aperture. The two apertures 3 are identical and are arranged immediately opposite each other in two side walls of the female part. Between the two apertures the upper surface of the tip 26 of the male part 2 forms part of the intermediate aperture 25 and the remaining part of the intermediate aperture 25 is formed by the intermediate wall parts situated between the side walls of the female part 1. The two apertures 3 are narrower than the aperture 25. The apertures 3 are formed in the wall parts 22 and 23. A locking body 4 is placed in the aperture 3 and 25, this body comprising two metal parts 7 and 8, each having opposing flat surfaces. Each part 7 and 8 is provided with an intermediate part 9 and 10, respectively, and two end parts 11 , 12 and 13, 14, respectively. The two flat surfaces are provided with spacers. Thus the part 7 has spacers 16 and 17 at its ends 11 and 12 and a spacer 15 at its intermediate part 9. As to part 8, it is provided with spacers 18 and 19 at its ends 13 and 14 and with a spacer 20 at its intermediate part 10. The space between the surfaces of the bar- like parts shown in Figure 10 is filled with a resilient material which may consist of vulcanized rubber. The locking body 4 shown in Figure 9 can thus be influenced in such a way that both flat surfaces of the parts 7 and 8 can move towards and away from each other. However, the parts 7 and 8 can never approach each other so far as to come into contact. The spacers ensure that, at maximum compression, the two flat surface will still be a certain distance from each other.
If the locking body 4 according to Figure 9 is inserted in the aperture 3 and 25, the two parts 7 and 8 will be pressed together so that the locking body can be inserted through the aperture 3. When the locking body is fully inserted into the aperture 3 and 25 the two parts 7 and 8 will move apart so that the intermediate part of the locking body adjusted to the aperture 25 and the ends to the apertures 3.
When a tooth arrangement is in operation the parts 7 and 8 will of course approach each other. However, thanks to the spacers, the locking body will have such a width than any instability in the exchangeable part of the tooth is avoided.
Another contribution to avoiding instability in the exchangeable part may be that the tip 26 of the male part has a cross section in the form of a T and that the cross section has been made as solid as possible. This can be achieved, for instance, by making the upright of the T as long as possible and as wide as possible and suiting the innermost end 24 of the aperture of the female part to the tip 26 of the male part so that the walls of the female part at the tip of the male part abut the tip of the male part as tightly as possible.
Since the tip of the male part has a cross section in the form of a T and the innermost part of the aperture in the female part is shaped to fit this T- shaped cross section it is obvious that the transverse parts of the bar of the T will be clamped between two surfaces inside the innermost part of the female part and the actual tooth can be worn rather considerably from below without it falling off the male part.
Figures 14-18 show the actual core of the tooth arrangement, i.e. both attachment parts to a cutter and the tooth part itself have been removed. The actual core part can be used in any type of attachment part and together with any type of tooth part. The Figures thus show only the region of the tooth arrangement containing the tip of the male part and the aperture of the female part, and the transverse aperture with locking body.
It has already been explained that the male part 26 has a cross section in the form of a large T. The cross section thus has an upright and two outwardly directed cross bars which may be considered to form a yoke. The lower side of each cross bar is machined in such a way as to acquire the character of an inclined surface forming an angle with the centre line of the two bars in such a way that the surface has a shorter distance to said centre line at the upright and a longer distance at the outermost end of the bar. The interior of the female body is shaped correspondingly so that when male and female parts are joined these inclined surfaces will function as a locking device for the male and female body, thereby allowing increased wear on the actual tooth from below, without the male and female parts becoming separated from each other. These two inclined surfaces can of course be replaced with other types of surfaces filling the same function, i.e. preventing the male and female parts becoming separated from each other due to wear.

Claims

C AIMS
1. A tooth arrangement consisting of a male part (2) and a female part (1) for attachment to a movable body (6) such as a cutter, the edge of an excavator or the like, wherein the female part (1) is exchangeable and the male part (2) and female part (1) are held together in that they together form a transverse aperture (3 and 25) running through the arrangement to receive an elongate locking body (4), characterized in that the aperture (3 and 25) comprises three parts, an intermediate part (25) and two identical end parts (3) of the same width, the intermediate part (25) having greater width than the two identical end parts (3), in that the locking body (4) comprises two parallel parts (7 and 8), each with a flat surface, said surfaces being opposite each other and provided with one or more outwardly directed spacers (16-19) and that resilient material (21) such as vulcanized rubber is arranged between the opposite flat surfaces.
2. A tooth arrangement as claimed in claim 1, characterized in that the locking body (4) has an intermediate part (9 or 10) and two end parts (11, 13 and 12, 14) are suited to the aperture (3 and 25), as regards length and width.
3. A tooth arrangement as claimed in claim 2, characterized in that each of the two parts (7 and 8) of the locking body is provided with a spacer (16, 17 and 18, 19, respectively) at each end and one or more spacers (15 and 20) on the intermediate part (9, 10, respectively).
4. A tooth arrangement as claimed in claim 1, characterized in that the tip (26) of the male part (2) has a cross section in the shape of a T and is dimensioned as solidly as possible and that the innermost end (24) of the female part (1) is designed to fit the tip (26) of the male part (2) so that the male part (2) is as immovable as possible.
PCT/SE1996/001481 1996-11-15 1996-11-15 Tooth arrangement WO1998022664A1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
DE69638100T DE69638100D1 (en) 1996-11-15 1996-11-15 TOOTH ARRANGEMENT
DK96943414.1T DK0950139T3 (en) 1996-11-15 1996-11-15 dental Facilities
EP96943414A EP0950139B1 (en) 1996-11-15 1996-11-15 Tooth arrangement
US09/284,996 US6385871B1 (en) 1996-11-15 1996-11-15 Tooth arrangement
AT96943414T ATE452250T1 (en) 1996-11-15 1996-11-15 TOOTH ARRANGEMENT
AU12150/97A AU739857B2 (en) 1996-11-15 1996-11-15 Tooth arrangement
PCT/SE1996/001481 WO1998022664A1 (en) 1996-11-15 1996-11-15 Tooth arrangement
BR9612786-4A BR9612786A (en) 1996-11-15 1996-11-15 Tooth arrangement.
ES96943414T ES2334180T3 (en) 1996-11-15 1996-11-15 TEETH PROVISION.
CA002271753A CA2271753C (en) 1996-11-15 1996-11-15 Tooth arrangement
PT96943414T PT950139E (en) 1996-11-15 1996-11-15 Tooth arrangement
HK00102422.4A HK1025611A1 (en) 1996-11-15 2000-04-20 Tooth arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1996/001481 WO1998022664A1 (en) 1996-11-15 1996-11-15 Tooth arrangement

Publications (1)

Publication Number Publication Date
WO1998022664A1 true WO1998022664A1 (en) 1998-05-28

Family

ID=20402254

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/001481 WO1998022664A1 (en) 1996-11-15 1996-11-15 Tooth arrangement

Country Status (11)

Country Link
US (1) US6385871B1 (en)
EP (1) EP0950139B1 (en)
AT (1) ATE452250T1 (en)
AU (1) AU739857B2 (en)
CA (1) CA2271753C (en)
DE (1) DE69638100D1 (en)
DK (1) DK0950139T3 (en)
ES (1) ES2334180T3 (en)
HK (1) HK1025611A1 (en)
PT (1) PT950139E (en)
WO (1) WO1998022664A1 (en)

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WO1999045211A1 (en) * 1998-03-02 1999-09-10 Componenta Wear Parts Ab Tooth arrangement
WO2000032881A1 (en) * 1998-12-02 2000-06-08 Metalogenia, S.A. Improvements to anchoring and retention elements intended to machines used in public works and similar

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US7178274B2 (en) * 2002-09-19 2007-02-20 Esco Corporation Coupling arrangement
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
US20060010725A1 (en) * 2004-07-14 2006-01-19 Jackson Michael J Excavating tooth and adapter
NZ602995A (en) 2006-03-30 2014-01-31 Esco Corp Wear assembly
US20080005940A1 (en) * 2006-07-10 2008-01-10 Esco Corporation Assembly for securing a wear
WO2008025062A1 (en) * 2006-08-28 2008-03-06 Cutting Edges Replacement Parts Pty Ltd Locking pin and a locking pin arrangement
US20080092412A1 (en) * 2006-10-24 2008-04-24 Esco Corporation Wear Assembly For An Excavating Bucket
TWI509131B (en) * 2009-10-30 2015-11-21 Esco Corp Wear assembly for excavating equipment
EP2507437A1 (en) * 2009-12-11 2012-10-10 CQMS Pty Ltd A wear member assembly
US9080313B2 (en) * 2010-01-20 2015-07-14 Bradken Resources Pty Limited Excavation tooth assembly
US9388553B2 (en) * 2013-05-31 2016-07-12 Caterpillar Inc. Retainer systems for ground engaging tools
US9840829B2 (en) 2015-12-01 2017-12-12 Srj, Inc. Flex pin
KR20190025021A (en) * 2016-07-06 2019-03-08 메탈로제니아 리서치 앤드 테크놀러지스 에스.엘. A wear protection system for a tool of a soil transfer machine and corresponding pin
US10400427B2 (en) 2017-05-31 2019-09-03 Srj, Inc. Flex pin
USD842345S1 (en) 2017-07-21 2019-03-05 Caterpillar Inc. Lip shroud for a ground engaging machine implement
USD832309S1 (en) 2017-08-30 2018-10-30 Caterpillar Inc. Lip shroud for a ground engaging machine implement
USD842347S1 (en) 2017-10-11 2019-03-05 Caterpillar Inc. Shroud for a ground engaging machine implement
USD842346S1 (en) 2017-10-11 2019-03-05 Caterpillar Inc. Shroud for a ground engaging machine implement
USD882645S1 (en) 2018-10-03 2020-04-28 Caterpillar Inc. Bucket shroud
USD882644S1 (en) 2018-10-03 2020-04-28 Caterpillar Inc. Bucket shroud
USD873306S1 (en) 2018-10-03 2020-01-21 Caterpillar Inc. Bucket shroud
USD882646S1 (en) 2018-11-09 2020-04-28 Caterpillar Inc. Bucket shroud
USD927561S1 (en) 2019-10-04 2021-08-10 Caterpillar Inc. Bucket shroud
USD928849S1 (en) * 2019-10-04 2021-08-24 Caterpillar Inc. Bucket shroud
USD928848S1 (en) * 2019-10-04 2021-08-24 Caterpillar Inc. Bucket shroud
USD959505S1 (en) 2021-03-25 2022-08-02 Caterpillar Inc. Bucket shroud
USD978923S1 (en) 2021-06-03 2023-02-21 Caterpillar Inc. Bucket shroud

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* Cited by examiner, † Cited by third party
Title
DATABASE WPI 1 January 1900 Derwent World Patents Index; AN 1980-C9006C, XP002958074, BARINOV V A; PETROV R S; SHEININ A S: "Excavators tooth end-piece mounting - t=shaped holding bar projections inserted in end-piece slot and secured with curved pin" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999045211A1 (en) * 1998-03-02 1999-09-10 Componenta Wear Parts Ab Tooth arrangement
WO2000032881A1 (en) * 1998-12-02 2000-06-08 Metalogenia, S.A. Improvements to anchoring and retention elements intended to machines used in public works and similar
ES2146186A1 (en) * 1998-12-02 2000-07-16 Metalogenia Sa Improvements to anchoring and retention elements intended to machines used in public works and similar
JP2002531728A (en) * 1998-12-02 2002-09-24 メタロジェニア，エス．エー． Improved locking and retaining elements for civil engineering and other machines

Also Published As

Publication number Publication date
EP0950139A1 (en) 1999-10-20
AU739857B2 (en) 2001-10-25
US6385871B1 (en) 2002-05-14
DK0950139T3 (en) 2010-04-06
AU1215097A (en) 1998-06-10
CA2271753A1 (en) 1998-05-28
ATE452250T1 (en) 2010-01-15
DE69638100D1 (en) 2010-01-28
EP0950139B1 (en) 2009-12-16
HK1025611A1 (en) 2000-11-17
ES2334180T3 (en) 2010-03-05
PT950139E (en) 2010-03-01
CA2271753C (en) 2001-10-23

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