WO1982003235A1 - Ensemble de goujons de retenue pour engins de terrassement - Google Patents

Ensemble de goujons de retenue pour engins de terrassement Download PDF

Info

Publication number
WO1982003235A1
WO1982003235A1 PCT/US1981/000329 US8100329W WO8203235A1 WO 1982003235 A1 WO1982003235 A1 WO 1982003235A1 US 8100329 W US8100329 W US 8100329W WO 8203235 A1 WO8203235 A1 WO 8203235A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
pin
sleeve
supporting member
support member
Prior art date
Application number
PCT/US1981/000329
Other languages
English (en)
Inventor
Tractor Co Caterpillar
Original Assignee
Radigan Michael T
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Radigan Michael T filed Critical Radigan Michael T
Priority to JP50217781A priority Critical patent/JPS58500415A/ja
Priority to PCT/US1981/000329 priority patent/WO1982003235A1/fr
Priority to GB08223602A priority patent/GB2109336B/en
Priority to CA000395748A priority patent/CA1173876A/fr
Publication of WO1982003235A1 publication Critical patent/WO1982003235A1/fr

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

  • This invention relates generally to earthworking tools and more particularly to a retaining pin assembly which is used to lock a replaceable wear tool to a supporting member.
  • Earthworking tools are extensively used, in conjunction with earthmoving machines, in construction and earthworking operations.
  • the earthworking tools are mounted on a shank or support member and are generally of the replaceable type. Periodical .replacement is necessary since the tools are subject to extreme wear due to operation in conditions where they encounter rock, sand, and other types of abrasive earthen materials.
  • various types of retaining pins have been used to secure the replaceable tool to the supporting member.
  • the retaining pin be easily and quickly removable and reinsertable. It is also desirable that the retaining pin be .reusable to conserve materials and costs. Also, it is essential that the retaining pin apply a continuous force between the tool and the support member in order to hold the tool in firm contact with the support member.
  • retaining pin includes a rigid metal member of rectangular cross-sectional shape, another metal member of less massive area, and a layer of resilient material bonded to and between the two metal members.
  • the resilient material is preferably rubber, and in the installed conditions, is under compression to cause the tooth to be drawn up on the adapter.
  • the retaining pin in the above-identified patent requires considerable effort and time consuming operations to produce. It is composed of two metal parts which require separate machining operations, a rubber part which also requires some type of ' operation to produce apertures therein, and further requires a bonding operation to bond the various parts together.
  • the tooth and adapter which uses the above-described pin, operates in severe earthworking conditions, the pin is subject to all type of environments, including dirt, sand, rock, mud, and water. Under these conditions, it is likely that the rubber member would have a short usable life.
  • repeated loading or impacting of the tooth can cause deterioration of the rubber, loss of holding force, and possible loss of the tooth from the adapter.
  • the present invention is directed to overcoming one or more of the problems as set forth above.
  • a retaining pin assembly for releasably securing an earthworking tool to a support member has a spring pin and a sleeve member.
  • the pin and sleeve are insertable in generally aligned pin receiving openings in the tool and support member to lock them together and maintain a portion of the tool in forceable contact with the support member.
  • Earthv7orking apparatus such as impact rock breakers and rippers, utilize a shank or support member which releasably supports a replaceable earthworking tool.
  • the tool is locked to the support by some type of retaining pin.
  • the retaining pin assembly of the present invention uses the force of a compressed spring pin to lock the tool to the support member and to maintain a portion of the tool in forceable contact with the support member as long as the pin assembly is in the installed position.
  • FIG. 1 is a diagrammatic side elevational view of an embodiment of the present invention, with the various members shown in the installed position;
  • Fig. 2 is a diagrammatic exploded view of the various members shown in Fig. 1;
  • Fig. 3 is a cross-sectional view taken generally along the line III-III of Fig. 2;
  • Fig. 4 is a cross-sectional view taken generally along the line IV-IV of Fig. 3;
  • Fig. 5 is a diagrammatic side elevational view of an alternate embodiment of the present invention.
  • an earthworking apparatus 10 includes a tool supporting. member 12, an earthworking tool 14, and a retaining pin assembly 16.
  • Supporting member 12 has first and second shoulders 18 and 20, a pin receiving opening 22, and a nose portion 24.
  • the tool 14 has first and second end portions 26 and 28, a pin receiving opening 30, and a cavity 32 which is closed at one end by a wall portion - . -
  • the retaining pin assembly 16 which serves to connect the tool 14 to the supporting member 12, includes a spring type pin 36 having an outer surface 38, and a sleeve 40 having first and seconc surfaces 42 and 44 of arcuate configuration.
  • the pin 36 is compressed between the pin recei ing opening 22 of the supporting member 12 and the second surface 44 of the sleeve 40.
  • Means 46 are provided for maintaining the sleeve 40 against rotation about pin 36 when the retaining pin assembly is in place holding the tool 14 to the supporting member 12.
  • Means 46 includes a key . portion 48 formed on the first surface 42 of the sleeve 40 and a_ slot 50 formed in the earthworking tool 14.
  • the key portion 48 preferably extends the full length of the sleeve 40.
  • the tool 14 further includes first and second walls 52,54, and each wall preferably contains a slot 50 to receive the key portion 48 of sleeve 40.
  • the key portion 48 extends radially outwardly from, the first surface 42 of the sleeve 40 and is integrally formed with surface 42.
  • the sleeve 40 is of a configuration to encompass between one- hird to two-thirds of outer surface of the spring pin 36, which is shown in phantom line detail. This provides adequate contact between the second surface 44 and outer surface 38 of the pin 36, and between the first surface 42 and the walls of -the pin opening 30, as shown in Fig. 1. A large area of contact between the sleeve 40 and the pin 36, and between the sleeve 40 and the walls of the pin openings - 5-
  • the sleeve 40 also includes means 56 for maintaining the sleeve 40 against axial movement along the spring pin 36.
  • the means 56 includes a protrusion 58 which extends radially outwardly from the first surface 42 of the sleeve 40 and is adjacent the key portion 48.
  • the protrusion 58 does not extend the full length of the sleeve 40 and stops short of each end of the sleeve 40 by generally the same distance.
  • the distance "D" between the ends 60 ' and 62 of protrusion 58 and the ends 64 and 66 of sleeve 40 is slightly less than the thickness of the walls 52 and 54 of the tool
  • an earthworking apparatus 72 includes a tool 74 which is mounted to a supporting member 76 by means of a rear mounting portion 78 which fits within a cavity 80 formed within the supporting member 76.
  • This mounting relationship is the reverse of the mounting relationship of the previous embodiment which has been described.
  • the retaining pin assembly 16 is identical with that of the first embodiment.
  • OMP pin 36 is now compressed between the second surface 44 of the sleeve 40 and a pin receiving opening 84 in the tool 74. Resistance to the force of the spring pin 36 when it is compressed is also taken through the contact of the first surface 42 of the sleeve 40 and the walls of the pin receiving openings 86 formed in the supporting member 76.
  • the tool 74 When the tool 74 is in the installed position with the rear mounting portion 78 within ' the cavity 80, and the retaining pin assembly 16 is assembled within the pin receiving openings 84 and 86, the tool 74 is seated against the supporting member 76 such that an end portion 88 of the tool 74 is in contacting relationship ' with shoulders 90 and 92 of the supporting member.
  • the subject retaining pin assembly 16 is particularly useful for locking an earthworking tool 14 to a supporting member 12, such as a shank of a rockbreaking apparatus.
  • the retaining pin assembly 16 also functions to force end portion 28 of the tool 14 into contacting relationship with the shoulders 18 and 20 of the supporting member 12, and to hold such members in forceful contact. It is important that the tool 14 fit tightly on the supporting member 12 and that axial forces applied to the tool 14 are transferred into the supporting member 12 through the contact of end portion 28 with shoulders 18 and 20. If the tool 14 does not fit tightly on the supporting member 12, energy transfer, between the tool 14 and the supporting member 12, will be reduced during an earthworking operation. In addition, the energy loss can be absorbed in heat, which can cause loss of strength in the working parts.
  • the tool 14 is fitted to the supporting member 12 such that the nose portion of member 12 penetrates the cavity 32 and the pin receiving openings 22 and 30 are generally aligned, although non-coaxial.
  • Sleeve 40 is then inserted into openings 22,30 and key portion 48 is seated within slot 50.
  • protrusion 58 spans the distance between v/alls 52 and 54 and ends 60 and 62 fit closely adjacent the inner surfaces of walls 52 and 54.
  • Spring pin 36 is then held in position adjacent the sleeve 40 and pin openings 22,30 and is struck with a hammer or other tool to force the pin 36 into the openings 22,30.
  • the pin 36 Since the pin 36 is larger in its uncompressed state than the space presented between surface 44 of the sleeve 40 and the pin opening 22, the pin is forced to compress as it is driven into the openings 22,30. Continuous blows are applied to the pin 36 until it is driven completely into the openings 22,30 and the ends of the pin 36 are generally flush with the outside surfaces of the tool 14.
  • the subject retaining pin assembly provides sufficient force to allow as cast, or as forged, surfaces for the end portions 28, As the pin 36 is being driven into the openings 22,30, an axial force is developed between the pin 36 and the sleeve 40. Such a force would normally displace the sleeve 40. However, the protrusion 58, which fits between the walls 52 and 54 of the tool, prevents axial displacement of the sleeve. When the pin 36 is driven out of the openings to remove the tool 14, the protrusion 58 functions in a similar manner to resist displacement of the sleeve 40.
  • the tool 14 and the supporting member 12 are subjected to rapid impact loads. Such loads cause severe vibrations in the earthworking apparatus 10 and, in prior art apparatus, have caused rotation of the retaining means within the pin openings.
  • the key portion 48 cooperates with the slot 50 to prevent rotation of the sleeve 40, and thereby ensures that the pin 36 remains compressed. As long as the pin 36 remains compressed, a force is applied to the tool 14 to keep it in contact with the supporting member 12.

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)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Devices For Opening Bottles Or Cans (AREA)

Abstract

Ensemble de goujons de retenue (16) permettant de fixer un outil de terrassement interchangeable (14) a un organe de support (12), comprenant un goujon du type a ressort (36) et un manchon (40) agissant de concert. L'ensemble de goujons (16) peut etre insere au travers d'ouvertures generalement alignees (30, 22) dans l'outil (14) et dans l'organe de support (12) et sert a verrouiller l'outil (14) a l'organe de support (12) et a amener de force une partie d'extremite (28) de l'outil (14) en contact avec les epaulements (18, 20) de l'organe de support (12). Les engins de terrassement, tels que les concasseurs a impact et les engins d'arrachement, comprennent generalement un outil interchangeable monte sur un bras ou un organe de support. Si l'outil n'est pas maintenu de force en contact avec l'organe de support, le goujon de retenue, l'outil et l'organe de support peuvent etre endommages. L'ensemble de goujons de retenue (16) de la presente invention assure le contact entre l'outil (14) et l'organe de support (12) et maintient une force de verrouillage continue entre l'outil (14) et l'organe de support (12).
PCT/US1981/000329 1981-03-06 1981-03-16 Ensemble de goujons de retenue pour engins de terrassement WO1982003235A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP50217781A JPS58500415A (ja) 1981-03-16 1981-03-16 土工作業用具の保持ピン組立体
PCT/US1981/000329 WO1982003235A1 (fr) 1981-03-16 1981-03-16 Ensemble de goujons de retenue pour engins de terrassement
GB08223602A GB2109336B (en) 1981-03-16 1981-03-16 Retaining pin assembly for earthworking tool
CA000395748A CA1173876A (fr) 1981-03-06 1982-02-08 Cheville de montage pour outils de terrassement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1981/000329 WO1982003235A1 (fr) 1981-03-16 1981-03-16 Ensemble de goujons de retenue pour engins de terrassement
WOUS81/00329810316 1981-03-16

Publications (1)

Publication Number Publication Date
WO1982003235A1 true WO1982003235A1 (fr) 1982-09-30

Family

ID=22161140

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1981/000329 WO1982003235A1 (fr) 1981-03-06 1981-03-16 Ensemble de goujons de retenue pour engins de terrassement

Country Status (3)

Country Link
JP (1) JPS58500415A (fr)
GB (1) GB2109336B (fr)
WO (1) WO1982003235A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157650A (en) * 1984-04-18 1985-10-30 Bofors Wear Parts Ab Wear part for earth working tooth
EP0531603A1 (fr) * 1991-09-13 1993-03-17 METALLURGICA VALCHIESE S.r.l. Dent composée pour machines de travaux publics

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3300467C2 (de) * 1983-01-08 1986-01-23 Berchem & Schaberg Gmbh, 4650 Gelsenkirchen Adapter für die Befestigung eines Schneidzahnes an dem Saugkopf eines Saugkopfbaggers
SE450504B (sv) * 1983-07-26 1987-06-29 Bofors Wear Parts Ab Slitdelssystem for verktyg till jordbearbetningsmaskiner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3624827A (en) * 1968-12-11 1971-11-30 Caterpillar Tractor Co Earthworking tooth and supporting adapter
US3796464A (en) * 1972-09-27 1974-03-12 Carmet Co Resilient connection for mining pick and bushing
US4155665A (en) * 1976-03-29 1979-05-22 Caterpillar Tractor Co. Resilient retention key for replaceable ripper teeth

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3624827A (en) * 1968-12-11 1971-11-30 Caterpillar Tractor Co Earthworking tooth and supporting adapter
US3796464A (en) * 1972-09-27 1974-03-12 Carmet Co Resilient connection for mining pick and bushing
US4155665A (en) * 1976-03-29 1979-05-22 Caterpillar Tractor Co. Resilient retention key for replaceable ripper teeth

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157650A (en) * 1984-04-18 1985-10-30 Bofors Wear Parts Ab Wear part for earth working tooth
EP0531603A1 (fr) * 1991-09-13 1993-03-17 METALLURGICA VALCHIESE S.r.l. Dent composée pour machines de travaux publics

Also Published As

Publication number Publication date
GB2109336B (en) 1985-04-17
JPS58500415A (ja) 1983-03-17
GB2109336A (en) 1983-06-02

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