WO2013037011A1 - Ensemble de blocage pour élément d'usure d'excavatrice - Google Patents

Ensemble de blocage pour élément d'usure d'excavatrice Download PDF

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Publication number
WO2013037011A1
WO2013037011A1 PCT/AU2012/001112 AU2012001112W WO2013037011A1 WO 2013037011 A1 WO2013037011 A1 WO 2013037011A1 AU 2012001112 W AU2012001112 W AU 2012001112W WO 2013037011 A1 WO2013037011 A1 WO 2013037011A1
Authority
WO
WIPO (PCT)
Prior art keywords
retaining
lock assembly
aperture
locking pin
recess
Prior art date
Application number
PCT/AU2012/001112
Other languages
English (en)
Inventor
Miguel Guimaraes
Josua KIRSCH
Doug WALLIS
Bruce Lilley
Edwin Schuetz
Original Assignee
Cqms Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2011903795A external-priority patent/AU2011903795A0/en
Application filed by Cqms Pty Ltd filed Critical Cqms Pty Ltd
Publication of WO2013037011A1 publication Critical patent/WO2013037011A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2825—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

Definitions

  • the invention relates to a lock assembly for an excavator wear member.
  • the invention relates to a lock assembly for releasably securing an excavator tooth to a nose of an excavator.
  • Excavator tooth assemblies mounted to the digging edge of excavator buckets and the like generally comprise a replaceable digging tooth, an adaptor body and an adaptor nose which is secured by welding or the like to the digging edge of a bucket or the like.
  • the tooth generally has a socket-like recess at its rear end to receivably locate a front spigot portion of the adaptor nose and a removable locking pin is generally employed to releasably secure the tooth on the adaptor.
  • excavator teeth are subjected to extensive load forces along a longitudinal axis of a tooth as well as in vertical and transverse directions.
  • a snug fit is required between the digging point and the front portion of the adaptor and also between the adaptor socket and the nose spigot portion and their respective mounting pins to avoid premature wear between the components.
  • the locking pins can loosen thereby increasing the risk of loss of a digging point or an entire adaptor/tooth combination. This necessitates considerable downtime to replace the lost wear members and where items such as locking pins are not recovered, these can cause damage and/or further downtime in downstream operations such as ore crushing and the like.
  • United States Patent No 4,182,058 describes an excavator tooth having a rearwardly divergent tapering socket to receive a nose having a complementary-shaped front spigot portion. Resistance to rotational moment forces is borne by a resilient steel cotter pin extending through aligned vertical apertures in the socket and spigot portions.
  • United States Patents 3,774,324, 4,338,736, 4,481 ,728, 4,903,420, 5,469,648, 7,100,315 and 6,735,890 all describe nose and tooth combinations wherein the nose has a generally convergently tapering spigot portion with a forward tip having a box-like configuration with at least the upper and lower surfaces thereof having faces parallel to each other and to a longitudinal axis of the nose portion.
  • Patent No 4,338,736, which describes a transverse locking pin each of the tooth mounting arrangements is heavily reliant on a large vertical locking pin to resist rotational moment forces tending to rotate the teeth off respective noses.
  • United States Patent No 4,231 ,173 describes a tapered adaptor nose having a box-like free end, which engages in a mating box-like socket cavity to resist rotational moments. Opposed pairs of rearwardly extending tongues engage in corresponding recesses in the outer surfaces of the adaptor nose to resist rotational movements. Because the tongues themselves are unsupported, they possess a limited capacity to resist rotational moment forces.
  • United States Patent No 5,272,824 describes a structure similar to that of United States Patent No 4,231,173 except that the side tongues are of more robust dimensions and the upper and lower tongues are formed as box-like members with apertures to receive a vertical mounting pin passing through aligned apertures in the tooth and adaptor nose.
  • United States Patent No 4,404,760 provides flat rail surfaces on the adaptor nose to engage with mating grooves in the socket aperture of a corresponding tooth wherein the mating rail and groove surfaces are generally parallel to the longitudinal axis of the tooth.
  • United States Patent No 5,423,138 describes a generally tapered nose having a box-like front end with upper and lower transverse surfaces generally parallel to a longitudinal axis of a tooth which located directly thereon.
  • the parallel upper and lower transverse surfaces are contiguous with upper and lower rail surfaces on each side of the nose and parallel to the longitudinal axis of the tooth.
  • a pair of rearwardly extending side tongues locate in recesses formed in the outer side faces of the nose, ostensibly to resist rotational moment forces in the tooth. Because the side tongues are recessed to accommodate the side rail portions, the robustness of the side tongues is somewhat compromised.
  • United States Patent No 4,233,761 describes a fairly stubby tapered nose having a box-like front portion with upper and lower surfaces generally parallel to a longitudinal axis of an excavator tooth, an intermediate rearwardly diverging tapered portion and a rear portion having upper and lower surfaces extending generally parallel to a longitudinal axis of the tooth.
  • Formed on the upper and lower surfaces of the front, intermediate and rear portions of the nose are spaced parallel reinforcing ribs which are located in mating grooves in the excavator tooth.
  • a large vertical locking pin extends through aligned apertures in the tooth and nose between the reinforcing ribs. This structure is heavily reliant on the locking pin to resist rotational moment forces however it is considered that this configuration may be prone to failure in the rear portion of the adaptor.
  • United States Patent No 5,709,043 describes a nose/adaptor combination wherein the adaptor socket tapers convergently towards a box-like front portion having upper and lower bearing surfaces generally parallel to a longitudinal axis of the tooth, a front transverse upright bearing surface and rearwardly divergent bearing surfaces formed at obtuse angles between the converging upper and lower walls and the side walls of the socket, ostensibly to avoid areas of stress concentration.
  • United States Patent No 6,018,896 describes a pin/retainer system for locking an excavation tooth onto an adaptor wherein the retainer is inserted in the adaptor and a wedge-shaped pin is driven into aligned apertures in the tooth and adaptor to resiliently engage with the retainer.
  • United States Publication No US 2002/0000053A1 describes a mechanism for releasably retaining an adaptor into the nose of a bucket lip or the like wherein a tapered threaded socket is non-rotatably located on the inside of an aperture in the side wall of the adaptor.
  • a threaded retaining pin extends through the threaded socket and locates in an aligned aperture in the bucket nose.
  • United States Patent No 5,337,495 describes a tooth assembly with a two-piece telescopically engageable adaptor secured to a nose with a tapered wedge pin assembly.
  • a similar mounting system is described in United States Patent No 5, 172,501 and United States Patent No 6,052,927.
  • Other retention systems for digging points on adaptors or adaptors on noses are described in United States Patents Nos 6, 119,378, 6,467,204, and 6,467,203.
  • United States Patent No 5,937,550 describes a lock assembly for releasably securing an adaptor to a nose of an excavator support structure.
  • the lock assembly comprises a body and a base coupled together and adapted for insertion, while coupled together, in a hole in the nose of the support structure.
  • the length of the lock assembly is extended to secure the adaptor and is retracted to release the adaptor. While adequate for securing an adaptor to a nose of an excavator support structure, the lock described in this patent is relatively complex in design and operation leading to high costs and labour intensive extraction procedures in the field.
  • Canadian Patent Application No 2,161 ,505 describes a system for removably retaining an excavation point on an adaptor with at least one flanged sleeve having a screw-threaded aperture therein, the flanged sleeve being non-rotatably locatable in a transverse bore in the adaptor before fitment of the point onto the adaptor.
  • a screw-threaded pin is inserted into the sleeve via an aperture in the point whereby portion of the head of the pin retains the point on the adaptor.
  • Australian Patent Application No 2003264586 describes a locking pin assembly comprising a body member having a non-circular cross- sectional shape locatable in a bore of complementary shape extending laterally between opposite sides of an excavator lip. mounting nose. After locating the body member in the nose aperture, an adaptor can be engaged over the nose with apertures in opposite side walls aligned with the body member. Threaded bolts engage in threaded apertures in opposite ends of the body member, the bolts each having a tapered shank portion with an enlarged boss at a free end thereof, the boss being locatable in a respective aperture in a side wall of said adaptor to prevent the adaptor from disengaging with the nose.
  • the invention resides in a lock assembly for an excavator wear assembly, the lock assembly comprising:
  • a retaining member having an aperture; wherein the aperture of the retaining member is tapered and is adapted to receive and retain the threaded portion of the locking pin therein.
  • the aperture of the retaining member preferably has a threaded portion that corresponds to the threaded portion of the locking pin.
  • the aperture is defined by an inner circumferential side wall of the retaining member, the inner circumferential side wall extending between a top surface and a bottom surface of the retaining member.
  • the aperture is substantially frustoconical, and is tapered from a first diameter adjacent the top surface to a second diameter adjacent the bottom surface.
  • the first diameter adjacent the top surface is greater than the second diameter adjacent the bottom surface.
  • the threaded portion of the locking pin has a diameter greater than the diameter of a main body portion of the locking pin.
  • a head of the locking pin has a recess therein.
  • the recess is shaped to receive and permit a tool to provide torque to the locking pin.
  • the head of the locking pin is adjacent the threaded portion.
  • the retaining member has an annular wall with a collar extending therefrom.
  • the collar is coaxial with the annular wall but has a smaller outer diameter.
  • an upper surface of the collar forms the top surface of the retaining member.
  • the collar is adapted to be received within circular main portions of receiving passages of a wear member and preferably the annular wall of the retaining member is adapted to be contained within a retaining recess of the wear member.
  • a detent extends outwardly from a body of the retaining member.
  • the detent preferably prevents rotation of the retaining member in use.
  • an excavator wear member comprising:
  • a locking aperture extending through a side wall of the excavator wear member, the locking aperture having a receiving passage and a retaining recess; wherein, the receiving passage extends inwardly from an outer face of the side wall and the retaining recess is located on an inner face of the side wall such that the receiving passage terminates at the retaining recess;
  • a retaining member located within the retaining recess, the retaining member having a tapered aperture that is adapted to receive and retain a locking pin therein.
  • the retaining member may be secured in the retaining recess.
  • the retaining member may be integral with the retaining recess.
  • an excavator wear assembly comprising:
  • an excavator wear member having a socket cavity and locking aperture extending through a side wall of the excavator wear member, the locking aperture having a receiving passage and a retaining recess;
  • a retaining member having an aperture adapted to be received within the retaining recess
  • an adaptor having a spigot portion located within the socket cavity of the excavator wear member and a retaining passage;
  • a locking pin is adapted to be located through the locking aperture of the excavator wear member and the retaining passage of the adaptor and wherein the aperture of the retaining member is tapered and is adapted to receive and retain a threaded portion of the locking pin therein.
  • the invention resides in a method of securing an excavator wear member to an adaptor having a spigot portion, the method comprising the steps of:
  • FIG 1A shows a perspective view of an excavator wear assembly according to an embodiment of the invention
  • FIG 1 B shows a side elevation view of the excavator wear assembly shown in FIG 1A;
  • FIG 1C shows an exploded perspective view of the excavator wear assembly shown in FIG 1A;
  • FIG 2A shows a reverse perspective view of a tooth forming part of the excavator wear assembly shown in FIG 1A;
  • FIG 2B shows a rear perspective view of a tooth forming part of the excavator wear assembly shown in FIG 1 A;
  • FIG 2C shows a sectional perspective view of the tooth shown in FIG 2A
  • FIG 3A shows a perspective view of a lock assembly shown in FIG.
  • FIG 3B shows an exploded perspective view of the lock assembly shown in FIG 3A
  • FIG 4 shows a perspective view of a locking pin forming part of the lock assembly shown in FIG 3A;
  • FIG 5A shows an underside perspective view of a retaining member forming part of the lock assembly shown in FIG 3A;
  • FIG 5B shows a topside perspective view of the retaining member shown in FIG 5A
  • FIG 5C shows a sectional perspective view of the retaining member shown in FIG 5A
  • FIG 6 shows a side elevation view of the lock assembly shown in FIG 3A with the retaining member shown in transparency
  • FIG 7A shows a side perspective view of retaining member shown in FIG 4A located within a tooth
  • FIG 7B shows a rear sectional perspective view of the view shown in FIG 6A
  • FIG 7C shows a top sectional view of the view shown in FIG 6A;
  • FIG 8 shows a sectional perspective view of the tooth located on the adaptor with the lock assembly therein.
  • the excavator wear assembly and lock assembly therefore are described with reference to an excavator wear member in the form of a tooth reieasably secured to an adaptor.
  • the adaptor is in turn secured to a nose of an excavator bucket or the like.
  • a skilled addressee will appreciate that the invention may be employed to reieasably secure an adaptor to a nose or a tooth directly to a nose of an excavator bucket lip and the like.
  • lock assembly may be utilized in other applications such as a retaining pin for components in dragline excavator rigging and the like.
  • FIG 1A shows a perspective view of an excavator wear assembly 1000 according to an embodiment of the invention.
  • FIG 1B shows a side elevation view of the excavator wear assembly 1000.
  • FIG 1C shows an exploded perspective view of the excavator wear assembly 1000.
  • Excavator wear assembly 1000 comprises a wear member in the form of a tooth 1 100 mountable on an adaptor 1200 and a lock assembly 1300 adapted to releasably secure tooth 1100 on adaptor 1200 as will be discussed in greater detail below.
  • Adaptor 1200 is suitably configured for mounting on a digging edge of an excavator by way of an adaptor socket 1210.
  • Adaptor socket 1210 is formed in a shape complimentary with a nose of an excavator digging edge (not shown).
  • Adaptor 1200 has aligned transverse apertures 1221 each extending through a respective opposed side wall 1220. Aligned transverse apertures 1221 are adapted to receive an adaptor retaining pin (not shown) which extends through aligned transverse apertures 1221 and an adaptor retaining pin passage in the complimentary shaped nose (not shown) to thereby retain the adaptor 1200 on the excavator digging edge.
  • adaptor 1200 has a pair of side wall mounting recesses 1203 and 1204 located in a forward portion of respective opposed side wall 1220.
  • Adaptor 1200 further includes a spigot portion 1230 extending from a forward portion thereof.
  • Spigot portion 1230 has converging upper and lower rear bearing surfaces 1231 , 1232 which terminate at substantially parallel upper and lower forward bearing surfaces 1233, 1234 respectively.
  • a front bearing face 1235 is disposed between upper forward bearing surface 1233 and lower forward bearing surface 1234.
  • Spigot portion 1230 also has a retaining passage 1237 extending therethrough between opposed side walls 1236 thereof.
  • FIG 2A shows a reverse perspective view of wear member in the form of tooth 1100.
  • FIG 2B shows a rear perspective view of the tooth 1 100 and
  • FIG 2C shows a sectional perspective view of the tooth 1100.
  • Tooth 1100 has a forwardly projecting working end 1 101 and a socket cavity 11 10 formed from converging upper and lower rear bearing surfaces 11 1 1 and 11 12 respectively. Each of upper and lower bearing surfaces 11 1 1 and 1 1 12 terminate at substantially parallel upper and lower forward bearing surfaces 1 1 3 and 1114 respectively. A front bearing face 1 1 15 is disposed between upper forward bearing surface 1113 and lower forward bearing surface 1 114.
  • Bearing surfaces 11 1 , 1 12, 1113, and 1 114 and front bearing face 1 15 of tooth socket 11 10 are configured to be complimentary with bearing surfaces 1231 , 1232, 1233 and 1234 and front bearing face 1235 respectively of spigot portion 1230 of adaptor 1200.
  • Socket cavity 1110 is adapted to receive spigot portion 1230 of adaptor 1200.
  • Tooth 1 100 further includes mounting ears 1 103 and 1 104 extending rearwardly of tooth body 102 from opposed sides thereof. In use, mounting ears 1103 and 1 104 are adapted to be located within mounting recesses 1203 and 1204 respectively of adaptor 1200.
  • a toe aperture 1 30 extends through .
  • toe aperture 1130 and locking aperture 1 120 are adapted to at least partially align with retaining passage 1237 of adaptor 1200.
  • Toe aperture 1 130 is generally circular in cross section and extends through mounting ear 1 103 as shown. Toe aperture 1130 is generally smaller than locking aperture 1120.
  • Locking aperture 1120 extends through mounting ear 1104 and is formed from a receiving passage 1 121 and a retaining recess 1 125. Optionally, locking aperture 1120 may extend through any wall of the tooth 1 100.
  • Receiving passage 1121 is generally circular and extends inwardly from an outer face of tooth 1 100 and terminates at retaining recess 1 125 located on an inner face of mounting ear 1104.
  • Retaining recess 1125 has a generally circular main portion 1 126 and a blind slot 1 27 extending outwardly from circular main portion 1126.
  • Circular main portion 1126 of retaining recess 1125 is concentric with circular main portion 1122 of receiving passage 1 121 with circular main portion 1126 having a relatively larger diameter thereby forming a locking face 1 128 at an inner end of retaining recess 1 125.
  • FIG 3A shows a perspective view of lock assembly 1300 in a locked position and FIG 3B shows an exploded perspective view of lock assembly 1300.
  • Lock assembly 1300 seen most clearly in FIG 3B and FIG 4, comprises a locking pin 1310 and a retaining member 1330.
  • Locking pin 1310 has a main portion 1312 and a threaded portion 131 1.
  • the threaded portion 131 1 is adapted to engage with the retaining member 1330.
  • Locking pin 1310 also has a toe portion 1313 extending from an end of main portion 1312 distal the threaded portion 1311. Toe portion 1313 is adapted to be located in toe aperture 1130 of tooth 1100 as will be discussed in greater detail below.
  • a recess 1314 is adjacent the threaded portion 131 1 of the locking pin 1310.
  • the recess 1314 is shaped to receive a tool capable of applying torque to the locking pin 1310.
  • the recess 1314 shown in FIG 4 is square in cross section, but other shapes would also be suitable including, for example, a hexagonal shaped recess.
  • the threaded portion 1311 is tapered towards an end 131 1 A as shown. Furthermore, there is an increase in the thread pitch over the last two revolutions adjacent the recess 1314.
  • FIG 5A shows an underside perspective view of retaining member 1330
  • FIG 5B shows a topside perspective view of retaining member 1330
  • FIG 5C shows a sectional perspective view of retaining member 1330.
  • Retaining member has a body 1331 formed from an annular collar 1334 and an annular wall 1333 having an aperture 1332A that extends between a top surface 1332 and bottom surface 1336.
  • the outer diameter of the annular wall 1333 is greater than the outer diameter of the annular collar 1334 creating a seat 1338.
  • a detent 1335 extends outwardly from body 1331 as shown.
  • Body 1331 is adapted to be received in circular main portion 1126 of retaining recess 1 125 of tooth 1 100 and detent 1335 is adapted to be received in blind slot 1 127 of retaining recess 1125 of tooth 1 100.
  • Annular collar 1334 is adapted to be received, at least partially, within circular main portion 1122 of receiving passage 1 121 of the tooth 1 100.
  • Retaining member 1330 has an inner circumferential side wall 1337 that extends between a top surface 1332 and a bottom surface 1336 of the retaining member 1330. As most clearly shown in FIG 5C, inner circumferential side wall 337 of retaining member 1330 is tapered from the top surface 1332 to the bottom surface 1336, defining a frustoconical aperture 1332A having a smaller diameter at the bottom surface 1336 than at the top surface 1332.
  • FIG 6 shows a side elevation view of the lock assembly 1300 in the locked position wherein threaded portion 1311 of locking pin 1310 is located within aperture 1332A of retaining member 1330.
  • the threaded portion 1311 frictionally grips, and is retained by, the inner surface 1337 of the retaining member 1330.
  • the inner surface 1337 of the retaining member 1330 is shown as being smooth, it could also have a thread which corresponds to the thread of the threaded portion 1311 of the locking pin 1310.
  • the threaded portion has sections that correspond to the taper of the circumferential inner side wall 1337 of the retaining member 1330 and this arrangement allows the pin 1310 to be more easily removed from the retaining member in circumstances where there is an ingress of dirt and fines. Furthermore, the increase in thread pitch provides an compressive load on the thread due to localized cross threading over the last two revolutions as previously described and this provides for increased pin retention.
  • Lock assembly 1300 is adapted to releasably secure tooth 1 100 on adaptor 1200.
  • the retaining member 1330 is located within retaining recess 1125 of locking aperture 1 120 of tooth 1100 as shown in FIG 7A, 7B and 7C.
  • detent 1335 is located within blind slot 1 127 thereby non-rotatably locating retaining member 1330 within retaining recess 1 125. Furthermore, seat 338 of retaining member 1330 abuts locking face 1 128 as shown.
  • retaining member 1330 may be permanently secured within retaining recess of locking aperture 1 120 of tooth by means of a chemical fastener or the like such that tooth 100 is provided in the arrangement as shown in FIGs 7A-7C.
  • retaining member 1330 may be integrally formed with tooth 1100.
  • the tooth 1100 is then slidably mounted onto adaptor 1200 such that spigot portion 1230 is located within socket cavity 1110 of tooth 1100 as previously discussed and as shown in FIG 8.
  • the locking assembly 1300 in FIG 8 is shown in the locked position with the adaptor 1200 and tooth 1100 being held together by lock assembly 1300.
  • the. retaining member 1330 is captively retained in retaining recess 1 125 of tooth 1100 in view of retaining recess 1 125 being coaxial with retaining passage 1237 of adaptor 1200.
  • bottom surface of retaining member 1330 contacts an outer face of side wall 1236 of spigot portion 1230 of the adapter 1200 to thereby captively retain retaining member 1330 in retaining recess 1125 of tooth 1100 as shown.
  • Retaining pin 1310 of lock assembly 1300 is then located through locking aperture 1 120, retaining passage 1237 and toe aperture 1 130, as shown in FIG 8, in order to place the lock assembly 1300 in the locked position to releasably retain tooth 100 on adaptor 1200.
  • Toe portion 1313 of locking pin 1310 is first located through locking aperture 1120 of tooth 1100. Toe portion 1313 travels through receiving passage 1 121 of locking aperture 1 120, aligned aperture 1332A of retaining member 1320, into retaining passage 1237 of spigot portion 1230 of adaptor 1200, and finally into toe aperture 1 130.
  • the threaded portion 1311 of locking pin 1310 which is greater in diameter than the main portion 1312 of locking pin 1310, comes into contact with the retaining member 1330.
  • the locking pin 1310 is then axially rotated such that the threaded portion 1311 of locking pin 1310 grips against inner surface 1337 of retaining member 1330.
  • the threaded portion 131 1 of locking pin 1310 is drawn into the retaining member 1330 until the threaded portion 131 1 is contained therein as illustrated in FIG 6.
  • the tapered inner wall 1337 of the retaining member 1330 increases the grip between the locking pin 1310 and the retaining member 1330 as the pin is inserted. Once fully inserted the pin 1310 is retained in the retaining member 1330 by friction.
  • a power tool (not shown) is usually used to axially rotate locking pin 1310 such that a sufficient force is used to overcome the frictional forces between the locking pin 1310 and the retaining member 1330.
  • the power tool can engage with, and exert sufficient torque to, the locking pin 1310 by engaging with the recess 1314.
  • one or more washers may be used, typically extending about toe portion 1313 and/or the threaded portion 1311 of locking pin 1313.
  • the embodiment of the lock assembly 1300 discussed above has particular advantages when it is time to replace tooth 1100 due to wear.
  • a power tool is used to axially rotate locking pin 1310 and unwind threaded portion 1311 of locking pin 1310 out of retaining member 1330 and therefore urging the locking pin 1310 out of locking aperture 1 120.
  • An outward end of locking pin 1310 is then available in order to draw the locking pin entirely from the aligned apertures and thus remove tooth 1 100 from adaptor 1200.
  • locking pin 1310 from locking aperture 1120 as a consequence of a power tool axially rotating locking pin 1310 as described above is particularly advantageous in circumstances where the locking pin 1310 becomes cemented within retaining passage 1237 of spigot portion 1230 of adaptor 1200 through ingress of fines and moisture.
  • the powered axial rotation is sufficient to overcome the force of the cementation and partially eject the pin 1310 to provide purchase for further withdrawal.
  • the excavator wear assembly of the invention and the lock assembly for securing the wear member in the form of a tooth to an adaptor avoids the need for many, often complex, parts. Furthermore, the lock assembly avoids the need for heavy hammers and the like for mounting within the respective retaining apertures and retaining cavities. In this way, the invention provides for an effective method of releasably securing the tooth to the adaptor.

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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)

Abstract

Cette invention concerne un ensemble de blocage pour un ensemble d'usure d'excavatrice. Ledit ensemble de blocage comprend une goupille d'arrêt et un élément de retenue qui se mettent en prise pour retenir un élément d'usure d'excavatrice telle qu'une dent, sur un adaptateur. Ledit élément de retenue présente une ouverture tronconique qui accueille et retient une partie filetée de ladite goupille d'arrêt.
PCT/AU2012/001112 2011-09-15 2012-09-17 Ensemble de blocage pour élément d'usure d'excavatrice WO2013037011A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2011903795A AU2011903795A0 (en) 2011-09-15 A lock assembly for an excavator wear member
AU2011903795 2011-09-15

Publications (1)

Publication Number Publication Date
WO2013037011A1 true WO2013037011A1 (fr) 2013-03-21

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN105442661A (zh) * 2015-12-03 2016-03-30 天津市中机雄风机械有限公司 一种用于斗齿的销轴连接组件
WO2016167963A1 (fr) 2015-04-17 2016-10-20 Caterpillar Inc. Coiffe pour la fixation amovible à une tête d'un élément de fixation et système de retenue d'outil compreant un dispositif de serrage et un ensemble cale comprenant un tel bouchon
US9951500B2 (en) 2015-04-17 2018-04-24 Caterpillar Inc. Tool retention system
US9970181B2 (en) 2015-04-17 2018-05-15 Caterpillar Inc. Lip for machine bucket
EP4022137A4 (fr) * 2019-10-22 2023-10-11 Rocks Gone Pty Ltd Agencement de fixation d'outil de mise en prise avec le sol

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Publication number Priority date Publication date Assignee Title
US197467A (en) * 1877-11-27 Improvement in nut and bolt locks
US1917431A (en) * 1928-12-22 1933-07-11 American Manganese Steel Co Excavating tooth base with laterally interlocked points
US2788829A (en) * 1955-05-04 1957-04-16 Illinois Tool Works Plastic nut having frusto-conical bore and locking portion
US20040107608A1 (en) * 2002-12-04 2004-06-10 Thomas Meyers Improvements in excavator teeth
US20090174252A1 (en) * 2008-01-08 2009-07-09 Esco Corporation Tip for an earth working roll
US20110023336A1 (en) * 2003-04-30 2011-02-03 Esco Corporation Releasable Coupling Assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US197467A (en) * 1877-11-27 Improvement in nut and bolt locks
US1917431A (en) * 1928-12-22 1933-07-11 American Manganese Steel Co Excavating tooth base with laterally interlocked points
US2788829A (en) * 1955-05-04 1957-04-16 Illinois Tool Works Plastic nut having frusto-conical bore and locking portion
US20040107608A1 (en) * 2002-12-04 2004-06-10 Thomas Meyers Improvements in excavator teeth
US20110023336A1 (en) * 2003-04-30 2011-02-03 Esco Corporation Releasable Coupling Assembly
US20090174252A1 (en) * 2008-01-08 2009-07-09 Esco Corporation Tip for an earth working roll

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016167963A1 (fr) 2015-04-17 2016-10-20 Caterpillar Inc. Coiffe pour la fixation amovible à une tête d'un élément de fixation et système de retenue d'outil compreant un dispositif de serrage et un ensemble cale comprenant un tel bouchon
US9951500B2 (en) 2015-04-17 2018-04-24 Caterpillar Inc. Tool retention system
US9957696B2 (en) 2015-04-17 2018-05-01 Caterpillar Inc. Tool retention system
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