EP1954890A1 - Tip assembly for earth moving machinery - Google Patents
Tip assembly for earth moving machineryInfo
- Publication number
- EP1954890A1 EP1954890A1 EP05823628A EP05823628A EP1954890A1 EP 1954890 A1 EP1954890 A1 EP 1954890A1 EP 05823628 A EP05823628 A EP 05823628A EP 05823628 A EP05823628 A EP 05823628A EP 1954890 A1 EP1954890 A1 EP 1954890A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tip
- nose
- assembly according
- tip assembly
- 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
Links
- 230000008878 coupling Effects 0.000 claims abstract description 21
- 238000010168 coupling process Methods 0.000 claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 claims abstract description 21
- 230000000295 complement effect Effects 0.000 claims abstract description 7
- 230000001747 exhibiting effect Effects 0.000 claims abstract description 3
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000000284 resting effect Effects 0.000 claims description 6
- 230000008719 thickening Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000013536 elastomeric material Substances 0.000 claims description 3
- 230000003993 interaction Effects 0.000 abstract 1
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- E02F9/2825—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
- E02F9/2808—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 tip assembly for earth moving machinery, such as excavators .
- tip assemblies for earth moving machinery comprising a tip, an adapter and a key for locking the tip to the adapter.
- the tip exhibits a pocket open at the back defining a female portion and a hole for seating the locking key obtained in a pair of opposed walls defining said pocket.
- the adapter exhibits a body shaped to be attached, for example by welding or bolting, to the machine bucket and a nose that extends from said body and that defines a male portion that geometrically couples with the tip pocket.
- the nose is crossed by a seat of the locking key, said seat extending between two opposed surfaces of said nose and being aligned with the hole in the tip.
- the object of the present invention therefore is to meet the above need while solving the disadvantages of the tip assemblies of the prior art .
- Such object is achieved with a tip assembly according to the following claim 1.
- figure 4 shows a perspective view of the tip only;
- figure 5 shows an axial section of the tip;
- figure 6 shows the tip viewed from the back end
- figure 7 shows a perspective top view of the adapter
- figure 8 shows a perspective bottom view of the adapter
- figure 9 shows a side view of the adapter
- figure 10 shows a perspective view of the locking key
- figure 11 shows an elevation view of the key
- figure 12 shows a plan view of the key in home position
- figure 13 shows a plan view of the key in use position.
- the tip assembly according to the present invention comprises a tip 11, an adapter 41 and a locking key 61.
- the tip assembly basically extends along a longitudinal axis X relative to which it is possible to determine a back portion and a front portion of the tip assembly. Axis X also coincides with the assembly direction of the tip to the adapter.
- Tip 11 is the actual earth moving tool while adapter 41 is the element for attaching the tip assembly to the bucket of an earth moving machinery, such as an excavator, in this case partly represented by a blade 10. While tip 11 is replaced when worn, adapter 41 remains normally attached to the bucket. The locking key 61 tightly secures tip 11 to adapter 41.
- Tip 11 exhibits a front working portion 11' and a back portion 11" for coupling with adapter 41.
- the coupling between tip 11 and adapter 41 is of the male- female type, the back portion 11" of the tip defining the female portion of the coupling. More in detail, said back portion 11" comprises a pocket 12 open at the back.
- Adapter 41 exhibits a front portion 42, hereinafter referred to as nose, and a back portion 50, called adapter body.
- Nose 42 is the male portion of the coupling with the tip and is shaped complementary to pocket 12 for introducing therein and geometrically coupling thereto.
- Nose 42 extends from body 50, which exhibits a shape, such as a V shape, for being attached, such as by welding of screwing, to blade 10.
- tip 11 exhibits a hole 16 for seating the locking key 61 obtained in a pair of opposed walls 13, 14 delimiting pocket 12.
- nose 42 is crossed by a seat 43 for the locking key 61, said seat extending between two opposed surfaces 47, 48 of said nose and being aligned with hole 16 in tip 11.
- at least one of said opposed surfaces of nose 47, 48 preferably both, exhibits a lowered or recessed zone 49 obtained around seat 43 for the locking key 61.
- each wall of pocket 12 facing each surface of the nose exhibiting the lowered zone 49 internally exhibits a relief 18 complementary to said lowered or recessed zone 49.
- the transversal axis Y is substantially vertical .
- this arrangement allows a convenient application and removal of the key from the top, that is, without the adjacent tip assemblies being a hindrance to such operations .
- said lowered or recessed zone 49 is defined by a plane portion perpendicular to said transversal axis Y.
- said relief 18 emerging from each of the inclined walls 13, 14 of pocket 12 is obtained by a thickening of said walls about hole 16 for the locking key 61, said thickening progressively increasing towards the pocket opening so as to define a plane perpendicular to said transversal axis Y.
- nose 42 and pocket 12 exhibit respective opposed side surfaces and walls 54, 15 substantially vertical.
- each of said side surfaces 54 of nose 12 exhibits, for the full extension thereof, a kerb or guide tongue 55 parallel to the longitudinal axis X.
- each of said side walls 15 of pocket 12 internally exhibits a guide groove 22 suitable for receiving said kerb or guide tongue 55 of the nose.
- pocket 12 ends at the front with a plane bottom 20 defining a front stop for nose 42. The latter exhibits a substantially plane front end 53 resting against said plane bottom 20 of the pocket.
- pocket 12 and nose 42 take up the shape of a parallelepiped with trapezoidal section of a truncated pyramid.
- said plane bottom 20 of the pocket is surrounded by a peripheral slot or groove 21 suitable for receiving any scrap or residues, for example due to pressing, casting or coating of tip 11.
- Said groove 21 ensures that adapter 42 always abuts against the stop plane 20, also in the presence of scrap, residues or dirt inside pocket 12. Consequently, hole 16 is always aligned with seat 43. Hole 16 and seat 43 can thus be made in a very accurate manner, without the need of providing for clearance for compensating any misalignment, clearance which would negatively affect the efficiency of locking of the tip to the adapter.
- tip 11 and adapter 41 exhibit further coupling portions shaped to penetrate each other when said tip and adapter are assembled.
- such reciprocal penetration is advantageously realised at the level of the surfaces of abutment of the tip on the adapter along the longitudinal axis X.
- body 50 of the adapter exhibits at the front a peripheral edge 51 substantially plane that surrounds nose 42 and that defines a shoulder or support stop for tip 11.
- at least one side of said peripheral edge preferably two opposed sides, exhibits a breakage 52 wherein there is inserted a respective complementary tooth 19 which extends in continuation from at least one, preferably two opposed, of the walls delimiting pocket 12.
- the junction line of the tip to the adapter is a broken line.
- hole 16 in pocket 12 and seat 43 in nose 42 exhibit respective back surfaces 16a, 43a substantially plane.
- the locking key 61 exhibits a back surface substantially plane 62 resting on said back surfaces of the hole and of the seat.
- the coupling between the back surface 62 of the locking key, tip 11 and adapter 42 is a coupling between plane surfaces.
- the locking key 61 exhibits a back portion 64 defining said back surface 62, a front portion 65 defining a front surface 63 and an intermediate portion 66 made of elastic material.
- Said intermediate portion 66 is suitable for allowing an introduction by compression of the locking key 61 in the adapter seat.
- the transversal section of seat 43 in- nose 42 is lower than the transversal section of the central portion 67 of key 61 intended for seating into said seat. Only by a compression of the intermediate portion 66 that allows moving the front 65 and back 64 portions close to each other, key 61 is introduced into seat 43.
- the intermediate portion 66 of the locking key 61 is made of elastomeric material, such as rubber.
- the two front and back portions of the key can for example be made of steel .
- hole 16 and seat 43 exhibit respective front surfaces 17, 44 that extend parallel to the transversal axis Y.
- the front surface 44 of the seat is rear relative to the front surface 17 of hole 16 so as to define a step 45 (at the top) and an undercut 46 (at the bottom) therewith.
- the transversal axis Y which substantially coincides with the main axis along which key 61 extends, the latter exhibits end portions 68 respectively interacting with said step 45 and with said undercut 46 so as to axially constrain key 61 into seat 43.
- said end portions 68 protrude at the front beyond the central portion 67 so as to define respective steps 69 therewith.
- the back portion 64 of the locking key 61 exhibits a rectangular cross section, whereas the front portion 65 exhibits a substantially semicircular cross section.
- each end portion 68 ends with a chamfer 70 acting as seat for an easy introduction of key 61 into seat 43.
- the elastic intermediate portion 66 exhibits a longitudinal extension, that is, along axis Y, smaller than the adjacent front 65 and back 64 portions, so as to be protected thereby when the key is pushed into seat 43 or removed from seat 43 with a tool acting on the end portions 68.
- walls 13, 14 of the pocket crossed by hole 16 for key 61 exhibit, at the level of said hole 16, a thickness at least equal to the height extension of said end portions 68 of the locking key 61.
- said hole 16 defines, with the underlying step 45, a seat for a guided pre-introduction of the locking key 61 in hole 16 of the pocket and in seat 43 in the adapter.
- the section of hole 16 is equal or slightly greater than the section of the end portions 68 of key 61, so that an end of the key may be inserted in a guided manner in hole 16 and may remain autonomously resting thereon, that is, without the aid of an operator, as shown in figure 3a.
- Such guided pre-introduction of the key enables the operator to push the key into seat 43 in an easy manner (the key being already perfectly aligned with the seat) and safely (it is not necessary to use the hands to hold the key into position) , for example using a hammer .
- connection between the reliefs and the lowered zones ensures a constant and high tear strength due to the mechanical strains the tip assembly is subject to.
- the presence of the plane contact surfaces between the locking key, the hole and the seat in the nose allows both having a wide rest surface of the key to the tip and to the adapter, to the advantage of the locking efficacy, both preventing any rotation of the key due, for example, to the vibrations it is subject to. Such undesired rotations could, in fact, cause a progressive extraction of the key from the seat thereof due to the presence of a compressible portion in the key.
- the key thus configured allows a single position of introduction in the hole and in the seat and thus an always correct snapping of the front step of the key in the undercut of the adapter.
- the locking key is sized so that the elastic intermediate portion compresses not only during the introduction in the seat thereof, but it remains compressed also after the introduction. Such compression, along with the presence of the marked front steps, allows avoiding any risk of accidental extraction of the key, for example due to the impact with items or debris while the machinery is working.
- the locking key and the hole in the pocket are sized to allow a resting of the key into said hole through an end portion thereof, already in aligned position with the seat in the nose and without the need of being manually supported.
- Such easiness of assembly of the tip assembly is also due to the presence of the abutment plane on the bottom of the pocket of the tip and of the groove surrounding it. In fact, as already explained above, said plane and said peripheral groove always ensure the same positioning between the tip and the adapter, and therefore a constant and perfect alignment between the hole in the pocket and the seat in the nose .
- the snap-wise coupling between tip and adapter also at the level of the outer contact surfaces imparts a very compact and smooth design to the tip assembly, as if the two elements were a single body. This also allows preventing any earth or other work materials from meeting any hindrances while loading and emptying the bucket.
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)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11173680A EP2378010A3 (en) | 2005-11-25 | 2005-11-25 | Tip for earth moving machinery and locking key therefore |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2005/000692 WO2007060697A1 (en) | 2005-11-25 | 2005-11-25 | Tip assembly for earth moving machinery |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1954890A1 true EP1954890A1 (en) | 2008-08-13 |
EP1954890B1 EP1954890B1 (en) | 2011-08-03 |
Family
ID=36681795
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05823628A Active EP1954890B1 (en) | 2005-11-25 | 2005-11-25 | Tip assembly for earth moving machinery |
EP11173680A Withdrawn EP2378010A3 (en) | 2005-11-25 | 2005-11-25 | Tip for earth moving machinery and locking key therefore |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11173680A Withdrawn EP2378010A3 (en) | 2005-11-25 | 2005-11-25 | Tip for earth moving machinery and locking key therefore |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080256832A1 (en) |
EP (2) | EP1954890B1 (en) |
CN (1) | CN101316968B (en) |
AT (1) | ATE518993T1 (en) |
BR (1) | BRPI0520798B1 (en) |
WO (1) | WO2007060697A1 (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2808623T3 (en) | 2006-03-30 | 2021-03-01 | Esco Group Llc | Wear member for excavation equipment |
WO2010089423A1 (en) * | 2009-02-06 | 2010-08-12 | Metalogenia, S.A. | Coupling system for use between a wear element and an adaptor for excavator machines and similar, and components thereof |
NZ701811A (en) * | 2010-12-07 | 2015-07-31 | Talon Engineering Sdn Bhd Company Number 1023659 H | Connection assembly for ground engaging tools |
WO2012162749A1 (en) * | 2011-06-02 | 2012-12-06 | Bradken Resources Pty Limited | Lock |
US8967287B2 (en) * | 2011-09-30 | 2015-03-03 | Caterpillar Inc. | Ripper tip for a ripper shank assembly |
US8943717B2 (en) | 2011-10-08 | 2015-02-03 | Caterpillar Inc. | Implement tooth assembly with tip and adapter |
US9062436B2 (en) | 2011-10-07 | 2015-06-23 | Caterpillar Inc. | Implement tooth assembly with tip and adapter |
US9057177B2 (en) | 2011-10-08 | 2015-06-16 | Caterpillar Inc. | Implement tooth assembly with tip and adapter |
US8943716B2 (en) | 2011-10-10 | 2015-02-03 | Caterpillar Inc. | Implement tooth assembly with tip and adapter |
CN103317535B (en) * | 2013-03-13 | 2016-05-25 | 宁波敏实汽车零部件技术研发有限公司 | Shovel cutting knife and knife rest thereof |
US20160032722A1 (en) * | 2014-07-30 | 2016-02-04 | Itr America Llc | Cutting link for mining chain and mining pin retention system |
US9670648B2 (en) | 2015-08-10 | 2017-06-06 | Caterpillar Inc. | Replaceable tip systems for a tine |
US10106960B2 (en) | 2015-11-25 | 2018-10-23 | Caterpillar Inc. | Lock assembly for ground engaging tool |
US9840829B2 (en) * | 2015-12-01 | 2017-12-12 | Srj, Inc. | Flex pin |
EA202091938A1 (en) * | 2016-02-08 | 2021-03-31 | ЭСКО ГРУП ЛЛСи | WEAR UNIT FOR GROUNDING EQUIPMENT |
US10400427B2 (en) * | 2017-05-31 | 2019-09-03 | Srj, Inc. | Flex pin |
CN107178104B (en) * | 2017-07-17 | 2020-11-24 | 千里马工程机械再制造集团有限公司 | Excavator for working on slope based on motor control bucket rotation |
US11846187B2 (en) | 2017-08-30 | 2023-12-19 | Itr America, Llc | Mining pin retention system |
IT201900023211A1 (en) | 2019-12-06 | 2021-06-06 | Esti S R L | COMPLEX CONSISTING OF A TIP AND A DRILL HOLDER FOR EARTH-MOVING MACHINES |
US11603647B2 (en) * | 2020-01-06 | 2023-03-14 | Pengo Corporation | Excavating tooth assembly for earth-digging equipment |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3126654A (en) * | 1964-03-31 | Locking device for excavating tooth | ||
US1330143A (en) * | 1919-08-29 | 1920-02-10 | Frog Switch & Mfg Company | Dipper-tooth |
US2251169A (en) * | 1940-07-16 | 1941-07-29 | Frog Switch & Mfg Company | Dipper tooth |
US2921391A (en) * | 1955-07-06 | 1960-01-19 | American Steel Foundries | Dipper tooth assembly |
GB980717A (en) * | 1963-04-03 | 1965-01-20 | Tooth H & L Co | Earth excavating implement |
US3508352A (en) * | 1967-06-14 | 1970-04-28 | Amsted Ind Inc | Dipper teeth assemblies with means to prevent random reaction points |
US3675350A (en) * | 1970-04-13 | 1972-07-11 | Amsted Ind Inc | Dipper tooth assembly |
DE2238454C3 (en) * | 1972-08-04 | 1980-02-07 | Karl 3262 Auetal Schwarzkopf | Pin locking, especially for locking: replaceable tooth tips of excavator teeth |
US4919566A (en) * | 1984-08-13 | 1990-04-24 | Caron Compactor Co. | Fill and compaction roller using readily replaceable cleat assemblies |
CN86209610U (en) * | 1986-11-29 | 1987-12-16 | 埃斯科公司 | Digging bucket teeth |
US5331754A (en) * | 1993-03-29 | 1994-07-26 | Gh Hensley Industries, Inc. | Resilient, ratcheted wedge and spool retaining structure for an excavation tooth |
SE504157C2 (en) * | 1994-03-21 | 1996-11-25 | Componenta Wear Parts Ab | The tooth arrangement; joining with a sprint |
US5709043A (en) * | 1995-12-11 | 1998-01-20 | Esco Corporation | Excavating tooth |
US6079132A (en) * | 1997-09-26 | 2000-06-27 | H&L Tooth Co. | Excavating tooth assembly |
US20030070330A1 (en) * | 2001-10-12 | 2003-04-17 | Olds John R. | Tooth retainer with rotary camlock |
US20040107608A1 (en) * | 2002-12-04 | 2004-06-10 | Thomas Meyers | Improvements in excavator teeth |
-
2005
- 2005-11-25 EP EP05823628A patent/EP1954890B1/en active Active
- 2005-11-25 BR BRPI0520798-3A patent/BRPI0520798B1/en not_active IP Right Cessation
- 2005-11-25 EP EP11173680A patent/EP2378010A3/en not_active Withdrawn
- 2005-11-25 AT AT05823628T patent/ATE518993T1/en active
- 2005-11-25 US US12/091,817 patent/US20080256832A1/en not_active Abandoned
- 2005-11-25 CN CN2005800521667A patent/CN101316968B/en active Active
- 2005-11-25 WO PCT/IT2005/000692 patent/WO2007060697A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007060697A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20080256832A1 (en) | 2008-10-23 |
BRPI0520798A2 (en) | 2009-06-23 |
EP2378010A2 (en) | 2011-10-19 |
CN101316968A (en) | 2008-12-03 |
CN101316968B (en) | 2011-07-27 |
EP2378010A3 (en) | 2012-01-18 |
EP1954890B1 (en) | 2011-08-03 |
WO2007060697A1 (en) | 2007-05-31 |
BRPI0520798B1 (en) | 2017-06-13 |
ATE518993T1 (en) | 2011-08-15 |
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