US3621594A - Cutting edge for excavating devices - Google Patents

Cutting edge for excavating devices Download PDF

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Publication number
US3621594A
US3621594A US798953A US3621594DA US3621594A US 3621594 A US3621594 A US 3621594A US 798953 A US798953 A US 798953A US 3621594D A US3621594D A US 3621594DA US 3621594 A US3621594 A US 3621594A
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US
United States
Prior art keywords
lip
shroud
scoop
seen
wear
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.)
Expired - Lifetime
Application number
US798953A
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English (en)
Inventor
Frederick C Hahn
Robert K Emrich
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Esco Corp
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Esco Corp
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Filing date
Publication date
Application filed by Esco Corp filed Critical Esco Corp
Application granted granted Critical
Publication of US3621594A publication Critical patent/US3621594A/en
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

Definitions

  • these scoops are provided with forwardly facing lips (as in the direction of element movement during normal ground engagement), and this term again is used in its generic sense referring to both horizontally elongated and generally vertically elongated edges, whether they be on the floor or bottom of the scoop or on sides or wings thereof.
  • the scoops are equipped with forwardly projecting tooth members to facilitate penetrating the earth and this term also is used generically, referring (as illustrated) to such forms as two piece teeth wherein adapters are releasably connected to the scoop and in turn support removably mounted points.
  • Other tooth members may include such known structures as single piece teeth wherein a wedge-shaped point has a rearwardly facing socket mounted on a nose which projects forwardly from and integrally with the scoop lip.
  • the inventive concept for minimizing lip maintenance includes the following aspects: 1) all areas of the lip and adjoining parts which normally encounter high rates of wear due to contact with the material being moved or excavated are protected by wear and cutting edges. The only wear which occurs on the lip and adjoining parts is that associated with contact with the wear and cutting edges, and this is kept to a minimum through close fit of the edges to the lip in order to prevent movement of the edges over the lip; (2) the lips are especially adapted for use of wear and cutting edges. Unlike present practice where lips are constructed with some built-in wear material to which may be added additional wear metal through the use of shrouds, these lips usually contain no 3,621,594 Patented Nov.
  • edges are mechanically held in place by quick-change locking devices requiring only seconds for engagement or disengagement; and (4) wear edges and cutting edges are of a segmented construction, i.e., small edge segments of the overall whole are replaceable without the necessity of removing all or large portions of this whole.
  • FIG. 1 is a perspective view of a six-yard front end loader bucket constructed and equipped according to the teachings of this invention
  • FIG. 2 is a schematic sectional view of the bucket of FIG. 1 featuring the cut-back wings;
  • FIGS. 3-5 are fragmentary perspective views of the left-hand corner of the bucket of FIG. 1 with certain of the replaceable elements being shown in different stages of installation;
  • FIG. 6 is a longitudinal, i.e. fore-and-aft sectional view on enlarged scale such as would be seen along the sight line 66 of FIG. 5;
  • FIG. 7 is a fragmentary sectional view taken along the line 7-7 of FIG. 6;
  • FIG. 9 is a longitudinal sectional view of a modified form of the inevntion and corresponds essentially to the showing in FIG. 6;
  • FIG. 10 is a transverse sectional view taken along the line 1010 of FIG. 9;
  • FIG. 11 is a fragmentary top plan view of the scoop of FIG. 9';
  • FIG. 12 is a fragmentary perspective view of the loader of FIG. 1 but seen from the rear right, and showing the corner adapters and wing shrouds;
  • FIGS. 13 and 14 are fragmentary perspective views of corner adapters
  • FIG. 16 is a fragmentary perspective view of the embodiment of FIGS. 9-11.
  • FIG. 17 is an exploded fragmentary perspective view of the embodiment of FIGS. 9-11.
  • the numeral 30 designates generally a front end loader bucket or scoop.
  • the invention is useful in conjunction with various lip-equipped devices such as shovel clippers, drag lines, wheel lips, hoe dippers, front end loaders and the like.
  • a scoop center 31 and right-hand and left-hand wings 32 and 33, respectively are Welded together into the scoop 30 as the basic scoop structural member.
  • the bucket 30 adjacent its forward lower end is equipped with a lip generally designated 34 (better seen in FIG. 3).
  • This lip 34 is provided with hearing pads as at 35 and slots as at 36 for the various attachments and locking devices.
  • the wings as at 33 in FIG. 2 are cut back as at 33a relative to the dashed line 30' which is the usual forward edge of the wings.
  • FIG. 3 it will be seen that a workman 37 is in the process of installing a shroud 38 on the lip 34.
  • the shroud may have a variety of cross-sectional configurations, i.e., V-shaped, U-shaped, L-shaped, etc., as can be appreciated from a consideration of FIGS. 6 and 9.
  • the side walls of the adapter 39 are recessed as at 47 so as to conform to the outer contour of the adjacent shrouds 38 and confine the same in place. Thus, it is unnecessary to provide any welding or lock means to positively connect the shroud 38 to the lip 34.
  • the shrouds or wear pieces 38 are actually part of the basic lip cross section and thereby eliminated extra weight, loading obstructions, and digging efficiency losses. Also, because the wear-resistant elements are added to a basic lip, the user can retailor his scoop to include different styles of teeth or a replaceable leading edge without any teeth but with the shrouds held by holders to make the scoop a more universal tool.
  • the lip shroud 38 is effectively extended by plate shrouds as at 48 in FIGS. 6 and 7 which also fit into the recesses 47. (The plate shrouds being omitted from the showings in FIGS. 3-5 for clearness of pieturization.) These plates overlie the bottom wall 31a of the scoop, somewhat rearward of the lip 34.
  • FIG. 8 In addition to the method of securement seen in FIGS. 1-7, the form illustrated in FIG. 8 is useful.
  • the bottom wall of the center 31, scoop 30 is also designated by the reference numeral 31a and this is somewhat rearward of the lip 34 and over the slight bearing pads 35.
  • the area 25 is subjected to extreme wear in use.
  • an augmented shroud designated 148 As an alternative to the plate shroud 48, we employ an augmented shroud designated 148. It is seen that there is a dissimilar material 149 sandwiched between the bottom wall 31a and the shroud 148, this being designated 149. For example, this can take the form of a resilient flexible material such as rubber for improving shock resistance.
  • the wall 31a and the shroud 48 or 148 may be spaced apart with asbestos in place of the rubber to provide a thermal barrier for high temperature operation.
  • an air gap may be introduced between the inside surfaces of the lip and plate shrouds and the lip properthis serving to effectively increase the gradient between the ambient temperature and the basic structural lip temperature.
  • Exemplary of high temperature operation is moving hot slag where front end loaders mounted on crawler type machines have been found to be the most economical and best suited to handling slag in the 700 to 1100 F. range.
  • the high ambient temperatures created tended to take the temper out of the steel in the bucket and reduce its service life accordingly. Through the modification just described, this drawback has been eliminated.
  • the tooth member is structured somewhat differently in that a nose-providing element 239 is provided integral with and projecting forwardly from the scoop bottom wall 31a as if the adapter 39 of FIG. 4 were cast integrally with the scoop.
  • the nose portion of the element 239 is designated again by the numeral 44 and this receives a wear point 45.
  • the wear point 45 is equipped with a wedge-shaped socket 45a extending forwardly into the point from the rear thereof.
  • the socket-defining walls terminate at the rear as at 4512 and these walls laterally overlap the forward end surfaces 238a of the shroud 238 to again confine the same in place in a fashion analogous to that seen in FIGS. 1-8.
  • shroud 238 is held on by a butt fit between the extreme sides of the shroud and the back edge 45b of the tooth point 45.
  • the shroud 238 in FIG. 11 has an arcuate leading edge giving the bucket a scalloped appearancethe'extreme sides 238a being further forward than the center part 238b, as seen in FIG. 11. No mechanical locking devices other than the standard locking device 46 is utilized.
  • a dovetail or enlarged edge is seen as at 238a to facilitate holding the shroud 238 in place.
  • a corresponding arrangement can be utilized relative to the center shrouds as seen in FIG. 9.
  • the shroud 238 is seen to be equipped with a rearwardly-extending tongue 250 and the scoop bottom wall recessed correspondingly as at 251.
  • the inventive arrangement allows the elimination of a large part of the normally required welding maintenanceutilizing mechanical connections in stead.
  • the segmented construction of the edges results in individual pieces small enough to make it feasible to discard them when worn out rather than to rebuild them through the expensive and laborious process of welding. It is now practical to maintain a more efficient digging configuration because the low cost in terms of time and labor for installation makes it reasonable to use edges with less wear metal and a correspondingly sharper configuration than was previously considered reasonable. Also, the lack of extra wear metal on the lip itself makes it possible to further enhance digging configuration.
  • FIG. 12 a corner adapter generally designated 52 is seen.
  • the adapter 52 has three legs. One leg 53 is clearly seen in FIG. 12. A second leg 54 is seen in FIG. 3 and is on the inboard side of the wing 33.
  • third leg 55 is the bottom leg.
  • the adapter 52 is removably fixed to the wing 32 (as in FIG. 10) by means of a locking device 56.
  • the wing shroud 57 is seen to overlie the wing lip (masked in FIG. 12) but again is held in place by means of coacting bearing surfaces in the area designated 58 in FIG. 12,"
  • FIG. 13 shows a protrusion 62 extending forwardly from the lip 34 which mates with a corresponding recess in the adapter 52.
  • a similar projection 63 can be seen in FIG. 3 for the purpose of accommodating the mounting of the center adapters 39.
  • the corner adapter 52 is recessed as at 64 in the same fashion as the center adapters 39.
  • Recesses 55 are provided on both sides of each corner adapter 52 but only one is used.
  • the corner teeth are mounted in an extreme outboard configuration thereby cutting clearance from the sides, reducing wear, and at the same time improving the penetrating and breakout efliciency of the corner lip area.
  • the corner tooth is located closer to the center of the lip (as in conventional designs), it has less capability of directing the material as it breaks up into the bucket or outside the bucket in the event it is directed in that manner due to its shape. For example, a rock which may have the tendency to go either inside or outside of the bucket is now properly guided by the extreme comer-mounted tooth without markedly slowing the loading action.
  • the invention also has the advantage of the cut-back sides or wings on the bucket which is made possible by shrouds on the lip wing.
  • the shrouds have the high strength-to-weight ratio available in cast products. As can be seen in FIG. 2, there is a substantial recessing of the wings relative to that normally designed into buckets and this permits more horizontal movement into the material to be excavated and enhances the ability of the bucket to penetrate-tending to improve the amount of material that is loaded on the average in each pass.
  • FIG. shows a modification made available through the practice of the invention.
  • the straightacross type of shroud employed in the FIG. 1 arrangement has been replaced with shrouds as at 338-342 which build the lip into a V configuration.
  • An excavating scoop having a forwardly projecting lip, a plurality of spaced-apart excavating teeth releasably mounted on said scoop and projecting forwardly of said lip, and a plurality of shrouds mounted on said scoop between said teeth and extending around said lip to protect the same, each of said teeth having a portion overlapping an adjacent shroud, said overlapping portions constituting the sole means to hold said shrouds in place, said lip being flanked by upwardly extending side walls terminating in a generally upwardly and forwardly facing wing edge, a wing shroud on each wing edge, an adapter mounted on said scoop straddling said lip and engaging said wing shroud, and a projection and recess interconnecting each wing shroud with each of said wing edge and the adapter associated therewith and arranged so that said adapter must be removed before removing said wing shroud.
  • said adapter includes a unitary body having a forwardly facing nose and three rearwardly extending legs, two of said legs being positioned above a third of said legs, said two legs being spaced from said third leg to straddle said lip, said two legs being spaced from each other to straddle one of said side walls, aligned openings in said two legs for the receipt of means for securing said adapter to said one side wall.

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  • 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)
  • Earth Drilling (AREA)
US798953A 1969-02-13 1969-02-13 Cutting edge for excavating devices Expired - Lifetime US3621594A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79895369A 1969-02-13 1969-02-13

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US3621594A true US3621594A (en) 1971-11-23

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US798953A Expired - Lifetime US3621594A (en) 1969-02-13 1969-02-13 Cutting edge for excavating devices

Country Status (8)

Country Link
US (1) US3621594A (fr)
JP (1) JPS502924B1 (fr)
BE (1) BE745621A (fr)
BR (1) BR7016703D0 (fr)
DE (1) DE2006657C3 (fr)
ES (1) ES376518A1 (fr)
FR (1) FR2035317A5 (fr)
GB (1) GB1292795A (fr)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736664A (en) * 1971-10-12 1973-06-05 Caterpillar Tractor Co Replaceable pinned-on cutting edge
US3762079A (en) * 1972-10-02 1973-10-02 Caterpillar Tractor Co Quick-change cutting edge
US3812608A (en) * 1971-12-06 1974-05-28 Abex Corp Dipper bucket corner member with integral shroud
US3851413A (en) * 1971-08-23 1974-12-03 Caterpillar Tractor Co Quick change cutting edge
US3896569A (en) * 1974-04-09 1975-07-29 Marion Power Shovel Co Earth working implement and tooth assembly therefor
US3958911A (en) * 1974-04-12 1976-05-25 Makeham Patricia L Die cutter for forage cubing device
US3961788A (en) * 1975-02-07 1976-06-08 Caterpillar Tractor Co. Bulldozer blade with improved tip and end bit
US3984929A (en) * 1975-10-08 1976-10-12 Caterpillar Tractor Co. Detachable cutting edge and tip-adapter arrangement for loader buckets
US4006544A (en) * 1975-05-12 1977-02-08 Caterpillar Tractor Co. Replaceable cutting edge assembly
US4007550A (en) * 1975-05-19 1977-02-15 Caterpillar Tractor Co. Replaceable corner tooth assembly
US4047312A (en) * 1976-09-08 1977-09-13 Caterpillar Tractor Co. Corner tooth assembly
US4071967A (en) * 1977-01-21 1978-02-07 Caterpillar Tractor Co. Quick change corner tooth assembly for loader buckets
US4127952A (en) * 1977-06-20 1978-12-05 Caterpillar Tractor Co. Replaceable adapter for an earthworking tool
US4182057A (en) * 1978-06-16 1980-01-08 Caterpillar Tractor Co. Releasable corner tooth assembly
US4238896A (en) * 1979-08-24 1980-12-16 Caterpillar Tractor Co. Cutting edge assembly for a loader bucket
US4932145A (en) * 1989-03-21 1990-06-12 Reeves Jr James B Excavating tooth point and adapter assembly with additional wear prevention elements
US5088214A (en) * 1991-01-17 1992-02-18 Esco Corporation Excavator wear edge
WO1995009950A1 (fr) * 1993-10-06 1995-04-13 Caterpillar Inc. Adaptateur fixe mecaniquement
US5412885A (en) * 1993-07-02 1995-05-09 Caterpillar Inc. Bucket base edge protector assembly
US5802752A (en) * 1994-03-21 1998-09-08 Componenta Wear Parts Ab Tooth arrangement for excavator
WO1999016982A1 (fr) * 1997-09-26 1999-04-08 H & L Tooth Company Ensemble dent d'excavation
US20040216334A1 (en) * 2003-04-30 2004-11-04 Esco Corporation Wear assembly for the digging edge of an excavator
US20050132619A1 (en) * 2003-12-23 2005-06-23 Robinson Howard W. Excavating lip-mounted adapter and associated connection and shielding apparatus
US20050229442A1 (en) * 2004-03-30 2005-10-20 Esco Corporation Wear edge assembly
US20060225313A1 (en) * 2005-04-12 2006-10-12 Esco Corporation Wear assembly
US20060225312A1 (en) * 2005-03-30 2006-10-12 Striegel Monte G Trench wall ripper apparatus
US20070204490A1 (en) * 2004-03-30 2007-09-06 Esco Corporation Wear assembly
US7992328B2 (en) 2005-03-30 2011-08-09 Striegel Monte G Trench wall ripper apparatus
US20130145660A1 (en) * 2011-12-09 2013-06-13 Minetec S.A. Rolled steel lip for an excavator bucket
US20140331528A1 (en) * 2012-05-29 2014-11-13 Komatsu Ltd. Excavating bucket for construction machine
US20160160476A1 (en) * 2014-12-05 2016-06-09 Caterpillar Inc. Replaceable shroud for work implement
US11236495B2 (en) * 2018-11-16 2022-02-01 Caterpillar Inc. Work implement assembly using a corner adapter mating with a notched base edge
WO2023166090A1 (fr) 2022-03-03 2023-09-07 Metalogenia Research & Technologies S.L. Carénages sans broche pour engins de terrassement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE787645A (fr) * 1971-08-23 1973-02-19 Caterpillar Tractor Co Bord tranchant de godet, rapidement remplacable.
US4204349A (en) * 1978-12-22 1980-05-27 Clark Equipment Company Corner tooth construction
GB2324783A (en) * 1997-05-03 1998-11-04 Stephen Herd Excavator bucket edge strip

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851413A (en) * 1971-08-23 1974-12-03 Caterpillar Tractor Co Quick change cutting edge
US3736664A (en) * 1971-10-12 1973-06-05 Caterpillar Tractor Co Replaceable pinned-on cutting edge
US3812608A (en) * 1971-12-06 1974-05-28 Abex Corp Dipper bucket corner member with integral shroud
US3762079A (en) * 1972-10-02 1973-10-02 Caterpillar Tractor Co Quick-change cutting edge
US3896569A (en) * 1974-04-09 1975-07-29 Marion Power Shovel Co Earth working implement and tooth assembly therefor
US3958911A (en) * 1974-04-12 1976-05-25 Makeham Patricia L Die cutter for forage cubing device
US3961788A (en) * 1975-02-07 1976-06-08 Caterpillar Tractor Co. Bulldozer blade with improved tip and end bit
US4006544A (en) * 1975-05-12 1977-02-08 Caterpillar Tractor Co. Replaceable cutting edge assembly
US4007550A (en) * 1975-05-19 1977-02-15 Caterpillar Tractor Co. Replaceable corner tooth assembly
US3984929A (en) * 1975-10-08 1976-10-12 Caterpillar Tractor Co. Detachable cutting edge and tip-adapter arrangement for loader buckets
US4047312A (en) * 1976-09-08 1977-09-13 Caterpillar Tractor Co. Corner tooth assembly
US4071967A (en) * 1977-01-21 1978-02-07 Caterpillar Tractor Co. Quick change corner tooth assembly for loader buckets
US4127952A (en) * 1977-06-20 1978-12-05 Caterpillar Tractor Co. Replaceable adapter for an earthworking tool
US4182057A (en) * 1978-06-16 1980-01-08 Caterpillar Tractor Co. Releasable corner tooth assembly
WO1980000088A1 (fr) * 1978-06-16 1980-01-24 Caterpillar Tractor Co Assemblage a dents en coin amovibles
US4238896A (en) * 1979-08-24 1980-12-16 Caterpillar Tractor Co. Cutting edge assembly for a loader bucket
US4932145A (en) * 1989-03-21 1990-06-12 Reeves Jr James B Excavating tooth point and adapter assembly with additional wear prevention elements
US5088214A (en) * 1991-01-17 1992-02-18 Esco Corporation Excavator wear edge
WO1992013145A1 (fr) * 1991-01-17 1992-08-06 Esco Corporation Bord d'usure d'excavateur a verrouillage elastique
US5412885A (en) * 1993-07-02 1995-05-09 Caterpillar Inc. Bucket base edge protector assembly
WO1995009950A1 (fr) * 1993-10-06 1995-04-13 Caterpillar Inc. Adaptateur fixe mecaniquement
US5438774A (en) * 1993-10-06 1995-08-08 Caterpillar Inc. Mechanically attached adapter
US5802752A (en) * 1994-03-21 1998-09-08 Componenta Wear Parts Ab Tooth arrangement for excavator
US6079132A (en) * 1997-09-26 2000-06-27 H&L Tooth Co. Excavating tooth assembly
WO1999016982A1 (fr) * 1997-09-26 1999-04-08 H & L Tooth Company Ensemble dent d'excavation
US7299570B2 (en) 2003-04-30 2007-11-27 Esco Corporation Wear assembly for an excavator
US20040216334A1 (en) * 2003-04-30 2004-11-04 Esco Corporation Wear assembly for the digging edge of an excavator
WO2004099510A3 (fr) * 2003-04-30 2005-03-24 Esco Corp Ensemble anti-usure pour le bord de creusement d'un excavateur
US6986216B2 (en) 2003-04-30 2006-01-17 Esco Corporation Wear assembly for the digging edge of an excavator
US20060010726A1 (en) * 2003-04-30 2006-01-19 Esco Corporation Wear assembly for an excavator
US20050132619A1 (en) * 2003-12-23 2005-06-23 Robinson Howard W. Excavating lip-mounted adapter and associated connection and shielding apparatus
US7596895B2 (en) 2004-03-30 2009-10-06 Esco Corporation Wear assembly
US20070022640A1 (en) * 2004-03-30 2007-02-01 Esco Corporation Wear edge assembly
US20070204490A1 (en) * 2004-03-30 2007-09-06 Esco Corporation Wear assembly
US20050229442A1 (en) * 2004-03-30 2005-10-20 Esco Corporation Wear edge assembly
US7793444B2 (en) 2004-03-30 2010-09-14 Esco Corporation Wear edge assembly
US20060225312A1 (en) * 2005-03-30 2006-10-12 Striegel Monte G Trench wall ripper apparatus
US7712234B2 (en) * 2005-03-30 2010-05-11 Striegel Monte G Trench wall ripper apparatus
US7992328B2 (en) 2005-03-30 2011-08-09 Striegel Monte G Trench wall ripper apparatus
US20060225313A1 (en) * 2005-04-12 2006-10-12 Esco Corporation Wear assembly
US20130145660A1 (en) * 2011-12-09 2013-06-13 Minetec S.A. Rolled steel lip for an excavator bucket
US8959806B2 (en) * 2011-12-09 2015-02-24 Minetec S.A. Rolled steel lip for an excavator bucket
US20140331528A1 (en) * 2012-05-29 2014-11-13 Komatsu Ltd. Excavating bucket for construction machine
US9074353B2 (en) * 2012-05-29 2015-07-07 Komatsu Ltd. Excavating bucket for construction machine
US20160160476A1 (en) * 2014-12-05 2016-06-09 Caterpillar Inc. Replaceable shroud for work implement
US9903101B2 (en) * 2014-12-05 2018-02-27 Caterpillar Inc. Replaceable shroud for work implement
US11236495B2 (en) * 2018-11-16 2022-02-01 Caterpillar Inc. Work implement assembly using a corner adapter mating with a notched base edge
WO2023166090A1 (fr) 2022-03-03 2023-09-07 Metalogenia Research & Technologies S.L. Carénages sans broche pour engins de terrassement

Also Published As

Publication number Publication date
BE745621A (fr) 1970-07-16
ES376518A1 (es) 1972-04-16
JPS502924B1 (fr) 1975-01-30
DE2006657A1 (de) 1970-09-03
BR7016703D0 (pt) 1973-06-05
DE2006657B2 (de) 1979-01-11
FR2035317A5 (fr) 1970-12-18
GB1292795A (en) 1972-10-11
DE2006657C3 (de) 1979-09-06

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