US20010051093A1 - Quick-coupling device for attaching tools to an excavator - Google Patents

Quick-coupling device for attaching tools to an excavator Download PDF

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Publication number
US20010051093A1
US20010051093A1 US09/847,372 US84737201A US2001051093A1 US 20010051093 A1 US20010051093 A1 US 20010051093A1 US 84737201 A US84737201 A US 84737201A US 2001051093 A1 US2001051093 A1 US 2001051093A1
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US
United States
Prior art keywords
coupling device
pin
pins
tool
holes
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.)
Abandoned
Application number
US09/847,372
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English (en)
Inventor
Giuseppe Riccardi
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LAMETER Srl
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LAMETER Srl
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Publication date
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Assigned to LAMETER S.R.L. reassignment LAMETER S.R.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RICCARDI, GIUSEPPE
Publication of US20010051093A1 publication Critical patent/US20010051093A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3631—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a transversal locking element
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated

Definitions

  • the present invention relates to a quick-coupling and changing device for attaching tools, such as buckets, hammers, ripper teeth and so forth, to an excavator.
  • the present invention provides a quick-coupling device that allows tools to be changed almost immediately.
  • Another feature which differentiates it from other quick couplings is the system that continuously eliminates the points of play that develop between quick coupling and tool as a result of the wear occasioned by use.
  • the subject of the present invention is therefore a quick-coupling device for attaching a tool to the arm of an excavator: this device comprises a main body provided with at least two side walls each connected at the rear to this working arm by two first pins to allow it to be rotated relative to this arm and at the front to upper walls of the abovementioned tool by two second pins for attaching them to this tool; and these second pins are able to extend out of these side walls and be housed in holes formed in these upper walls of the tool under the action of control means mounted in the abovementioned housing for automatically inserting and removing them into and from the abovementioned holes, these upper walls being provided with rear hook means for attaching the tool to two pins concentric with the centre of rotation of the main body of the device.
  • the present automatic coupling device thus enables the operator of the excavator to carry out the work in much shorter cycle times, with greater efficiency, speed and convenience, especially owing to the dramatic shortening of the down times necessary for changing conventional tools.
  • FIG. 1 illustrates schematically a main arm of an excavator and a bucket waiting to be attached to this arm by a coupling device according to the present invention
  • FIG. 2 illustrates the bucket of FIG. 1 attached to the main arm of the excavator with the aid of the present device
  • FIG. 3 is a partial top view in section of the coupling device of FIG. 1 fitted with safety springs and a hydraulic cylinder containing pistons for inserting two securing pins into the bucket;
  • FIG. 4 is an enlarged top view in section showing the hydraulic cylinder and a first alternative embodiment of the safety springs
  • FIG. 5 is a view of a second alternative embodiment of the safety springs.
  • FIGS. 6 a, 6 b and 6 c are three partial views of an alternative embodiment of the bucket securing pins and of the safety springs at three different stages of their working phases.
  • this illustrates a main arm 1 of an excavator and a bucket 2 for excavating operations, waiting to be attached to the pins 4 of the main body 3 of the quick-coupling device according to the present invention.
  • This device comprises a body 3 consisting essentially of two side walls 306 and a lower wall 304 . These side walls 306 and this lower wall 304 consist of suitably shaped plates.
  • Three pairs of through holes 301 , 302 , 303 are formed in these plates 306 : when a pin 401 is inserted into the two holes 301 the body 3 is attached at the rear in such a way that it can rotate on the ends of the main arm 1 ; the two holes 302 allow the present device to be connected to a hydraulic operating system comprising on each lateral plate 101 a pair of levers 5 hinged to a hydraulic cylinder 6 , which is controlled by an operator inside the excavator.
  • the lower lever 5 is connected to these plates 306 by a pin 40 inserted through the said holes 302 .
  • This hydraulic cylinder 6 The function of this hydraulic cylinder 6 is to raise and lower the body of the device 3 and hence the bucket 2 , once attached to the device; while the side plates 306 have two holes 303 at the forward end, through each of which a pin 7 can extend and engage, as will be described later, in a hole 204 in each of two upper walls 205 of the bucket 2 .
  • This bucket 2 also includes a structure 201 whose upper box 202 is shaped in such a way as to fit, when attached, the lower plate 304 of the body 3 , which is as stated suitably shaped.
  • On the said upper walls 205 of the bucket 2 are two means 203 of attachment to the side pins 4 of the main arm I of the excavator.
  • a strengthening means 305 positioned at the forward end and crossways relative to the side plates 306 .
  • FIG. 2 Shown in FIG. 2 is the bucket 2 as attached to the main arm 1 of the excavator, a configuration which is arrived at after a series of operations in which the main body 3 of the device is rotated upwards about the pin 401 by the operator operating the hydraulic cylinders 6 : this facilitates the insertion of these pins 4 into the attachment means 203 , the distance between which also ensures that the said body 3 has plenty of room in the vertical direction for its insertion.
  • FIG. 3 The insertion of the pins 7 into the holes 204 in the upper walls 205 of the bucket 2 is illustrated in cross section in FIG. 3.
  • This cross section illustrates both positions of the pins 7 , i.e. before insertion into the holes 204 (pin 7 ′ on the left) and after insertion (pin 7 ′′ on the right).
  • This insertion is controlled by the operator and effected by means of a hydraulic cylinder 8 in which are two pistons 9 , each with a rod 10 and these rods 10 extend from the end walls 801 of the cylinder 8 via through holes 802 .
  • the pins 7 ′ and 7 ′′ comprise a first, more inward cylindrical part 701 which fits through the hole 303 in the corresponding side plate 306 , and a more outward part 702 on which is formed a bevel designed to slide over a flat 206 formed in the hole 204 of the upper walls 205 of the bucket 2 .
  • this bevelled part 702 ensures progressive self-alignment as the pins 7 go in, great precision in the attachment and, in the very severe working conditions of the excavator, enhanced coupling between the side plates 306 of the coupling device and the bucket 2 , because during these phases the bucket 2 tends to compress against the coupling device and the pins 7 , because of the bevelled part 702 , can advance further, so increasing, as stated, the coupling between the side plates 306 and the bucket 2 : besides this, this solution is capable of absorbing any play created by the wear of parts in contact.
  • the cylinder 8 comprises a side wall 803 containing three holes 804 , 805 , 806 for the admission of a hydraulic fluid into the chamber: the central hole 805 acts on the faces of the pistons 9 so as to push the rods 10 and hence the pins 7 into the holes 204 (see pin 7 ′′), while the side holes 804 and 806 act on the backs of the pistons 9 to withdraw the pins 7 from the said holes 204 (see pin 7 ′).
  • the pressurized hydraulic fluid required to carry out these operations of inserting or removing the pins 7 is supplied to the cylinder 8 via a known hydraulic circuit by means controlled by the operator. Withdrawing the pins 7 is naturally easier for this operator than inserting them as there are no difficulties of engagement which could occur in the insertion operation.
  • the present device also includes safety means for locking the said pins 7 in the inserted position in the holes 204 , as a precaution against failures such as loss of oil from the circuit.
  • FIG. 3 shows a first, highly schematic embodiment of two sets of springs 14 , one set for each of the two pins 7 .
  • the springs are mounted around the cylinder 8 , parallel with its longitudinal axis.
  • Each spring 14 of each set belonging to one of the pins 7 is attached at one end to a support flange 15 connected to the relevant pin 7 and, at the other end, fits into a sleeve 16 attached to a support 17 provided around the side wall 803 of the cylinder 8 .
  • springs 14 work in compression and ensure that, in the event of failure of the hydraulic circuit, the pins 7 do not come out of the holes 204 of the bucket 2 .
  • the springs 14 are partially relaxed by the action of the hydraulic fluid which is simultaneously pushing this pin 7 ′′ into its hole 204 .
  • the springs 14 situated behind the pin 7 ′, which is withdrawn from the upper wall 205 are however compressed by the action of the fluid acting on the back of the corresponding piston 9 .
  • FIG. 4 shows a first alternative embodiment of the safety springs.
  • the springs 14 are housed at one end in a cup 18 to which a sleeve 19 is fixed, while at the other end they are fixed in a seat 20 recessed into the flanges 15 .
  • These flanges 15 are attached to the inner edge of the cylindrical part 701 of the pins 7 with coupling means 21 , such as pins, bolts or the like.
  • Each cup 18 is attached on the outside to a bolt 22 fitted with a nut 23 and engaged in a tapped hole formed in each support 17 . By turning the bolts 22 it is possible to adjust the precompression of the springs 14 .
  • the sleeve 19 of each spring has passed into a jacket 24 attached to the flange 15 , ensuring good maintenance of the alignment of the said pin 7 ′ during the operations of inserting it into the hole 204 .
  • the sleeve 19 may perhaps come a short way out of the said jacket 24 , with the spring 14 partially relaxed.
  • this figure also shows the special shaping and the flats of the plates 12 which are fastened by a rod 13 to the disc 11 housed between them.
  • FIG. 5 Shown in FIG. 5 is an alternative embodiment using a single set of springs 25 arranged around the side wall 803 of the cylinder 8 and parallel to the two rods 10 .
  • each spring 25 is placed inside a sleeve 29 that can slide inside a jacket 30 .
  • This jacket 30 is attached to one of the two flanges 15 connected to one of the pins 7 , in this case the upper flange 15 in the figure, while the sleeve 29 is attached to the inner side of a support 26 through which passes a tapped hole carrying a bolt 27 for adjusting the compression of the spring 25 : this bolt is provided with a nut 28 butted against the outer side of the said support 26 and is attached to the other flange 15 connected to the other pin 7 , in this case the lower flange 15 in the figure. Telescopic sliding of the sleeve 29 inside the jacket 30 gives constant protection to the spring 25 and at the same time precise alignment during the operations of inserting and removing the pins 7 .
  • the sleeves 29 are partly out of the jackets 30 because the pins 7 have been fully inserted into their respective holes 204 by the action of the pressurized fluid which has entered the central admission hole 805 of the cylinder 8 and has acted on the faces of the two pistons 9 .
  • the fluid enters via the side admission holes 804 and 806 and will push on the backs of the pistons 9 in such a way as to pull the pins 7 in and increase the overlap between the jackets 30 and the sleeves 29 .
  • FIG. 6 a illustrates an alternative embodiment of the pin 7 and of the safety means which ensure its insertion into the hole 204 in the bucket 2 in the event of failure of the hydraulic circuit.
  • a cylindrical seat 703 Formed in the inner face of the cylindrical part 701 of the pin 7 is a cylindrical seat 703 into which fits a cup 31 housing one end of a spring 32 , the other end of which is in abutment against the base of the cylindrical seat 703 .
  • This cup 31 is connected to the outer end of the rod 10 of the cylinder 8 by a bolt 33 comprising a threaded portion 34 and a head 35 of larger cross section on its inside end.
  • This head 35 is housed inside a hole 704 running in from the outside of the bevelled part 702 of the pin 7 and terminating close to the base of the cylindrical seat 703 , leaving a portion in which a hole 705 is formed in which a portion of the bolt 33 close to the said head 35 can slide.
  • the threaded portion 34 passes through a first tapped hole 37 formed in the base of the cup 31 and passes into a second tapped hole 36 running in from the outer end of the rod 10 and in axis with the hole 704 .
  • On this threaded portion 34 are two nuts 38 and 39 for adjusting the compression of the spring 32 , the nut 38 butting against the base of the cup 31 and the nut 39 against the outer surface of the rod 10 .
  • the safety means (the spring 32 ) of the coupling device can therefore be inserted into the pin 7 itself, coaxially therewith, thus avoiding the use of springs arranged around the cylinder 8 as in the previous cases. It should be observed that two or more coaxial springs of different sizes could be housed between the cup 31 and the cylindrical seat 703 .
  • FIGS. 6 b and 6 c together with FIG. 6 a will reveal the operation of the device when inserting the pin 7 in this alternative embodiment.
  • the rod 10 When the operator sends pressurized fluid into the cylinder 8 the rod 10 begins to extend from the said cylinder and push the pin 7 connected to it along the hole 303 of the side plate 3 until it is fully into the hole 204 of the upper wall 205 of the bucket 2 .
  • the pin 7 reaches the situation of FIG. 6 b, in which therefore the rod 10 , the cup 31 , the spring 32 , the bolt 33 and the pin 7 have moved as if all one rigid body.
  • the pin 7 advantageously remains locked in position inside the hole 204 .
  • fluid must be supplied to the side admission holes described earlier of the cylinder 8 and the rod 10 retracted so that it first places the head 35 of the bolt 33 in abutment against the bottom of the hole 704 and then, by virtue of this abutment, pulls in the pin 7 .
  • the present quick-coupling device for an excavator is therefore characterized by many advantages including: no modification of any kind to the original mechanism and features of the excavator to which it is applied, the machine's original pins 401 and 40 being used and no alteration being made to the centres of rotation of the various parts, the working distances and so forth, so that the original efficiency of the machine is unaltered; quick and simple attachment/detachment of the various tools to and from the main arm, with generous lead-in bevelling to facilitate engagement, both horizontally and vertically; an efficient mechanism of progressive self-insertion enabling penetration and forced locking of tools; a high degree of safety against the risk of failure of pressure of the hydraulic fluid, by means of the various springs described; and extreme mechanical robustness, allowing the use of tools such as drills or the like which severely stress the arms of the excavator.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)
  • Earth Drilling (AREA)
US09/847,372 2000-05-19 2001-05-03 Quick-coupling device for attaching tools to an excavator Abandoned US20010051093A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITGE2000A000073 2000-05-19
IT2000GE000073A IT1314744B1 (it) 2000-05-19 2000-05-19 Dispositivo di attacco rapido di attrezzi per escavatori.

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US20010051093A1 true US20010051093A1 (en) 2001-12-13

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US (1) US20010051093A1 (de)
EP (1) EP1156161A3 (de)
IT (1) IT1314744B1 (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1618257A1 (de) * 2003-04-16 2006-01-25 Volvo Construction Equipment Holding Sweden AB Arbeitsmaschine mit einer gerätekupplung und einem geräteverriegelungselement
WO2007064651A2 (en) * 2005-12-02 2007-06-07 Clark Equipment Company Control circuit for an attachment mounting device
US20100189535A1 (en) * 2009-01-27 2010-07-29 John Charles Nye Coupler device to connect bucket or tool to boom arm
US20120227246A1 (en) * 2009-07-09 2012-09-13 Dawson Francis J Apparatus for connection of an implement to machinery
CN103510558A (zh) * 2012-11-14 2014-01-15 广西柳工机械股份有限公司 装载机侧卸斗
CN106759576A (zh) * 2015-11-24 2017-05-31 卡特彼勒作业机具有限公司 用于将作业工具组装到机器的装置和方法
US9976277B2 (en) 2015-11-24 2018-05-22 Caterpillar Work Tools B.V. Apparatus and method for coupling work tool to a machine
US10106949B2 (en) * 2016-03-18 2018-10-23 Caterpillar Work Tools B.V. Coupler for an implement assembly
CN109235518A (zh) * 2018-09-25 2019-01-18 中铁工程机械研究设计院有限公司 工程机械工具头快换结构及机臂
CN113511569A (zh) * 2021-04-15 2021-10-19 中船第九设计研究院工程有限公司 一种脱钩复位装置及脱钩复位方法
CN115369938A (zh) * 2022-09-22 2022-11-22 钱薛飞 一种快换式铲斗的液压挖掘机
SE2130194A1 (en) * 2021-07-09 2023-01-10 Smp Parts Ab Quick coupling device
IT202200003770A1 (it) * 2022-04-28 2023-10-28 Tm Benne S R L Gruppo attacco rapido per braccio di escavatore

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2230981B1 (es) * 2003-01-24 2007-03-01 Claudi Herguido Fo Dispositivo de acoplamiento rapido para implementos de maquinas excavadoras o analogas.
ES2349917B1 (es) * 2007-11-08 2011-12-02 Fravizel-Equipamientos Metalomecanicos, Lda. Enganche rapido
WO2020106239A1 (en) * 2018-11-21 2020-05-28 Akbiyik Ismail Hydraulic pin connection device for practical installation and removal of different work tool attachments to construction machinery.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE458534B (sv) * 1987-07-20 1989-04-10 Lidkoeping Svets & Maskinprod Anordning vid en snabbkoppling foer loesbar sammankoppling av ett arbetsredskap och en graevmaskins manoeverarm
JPH02104824A (ja) * 1988-10-12 1990-04-17 Takayuki Takahashi 油圧式ショベルの作業機着脱装置
US5546683A (en) * 1993-09-29 1996-08-20 Clark; George J. Bucket attachment device with remote controlled retractable pins
GB2308839A (en) * 1995-12-30 1997-07-09 Samsung Heavy Ind Device for Connecting Iplement to Machine

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1618257A1 (de) * 2003-04-16 2006-01-25 Volvo Construction Equipment Holding Sweden AB Arbeitsmaschine mit einer gerätekupplung und einem geräteverriegelungselement
WO2007064651A2 (en) * 2005-12-02 2007-06-07 Clark Equipment Company Control circuit for an attachment mounting device
US20070128014A1 (en) * 2005-12-02 2007-06-07 Clark Equipment Company Control circuit for an attachment mounting device
WO2007064651A3 (en) * 2005-12-02 2007-12-06 Clark Equipment Co Control circuit for an attachment mounting device
US7455494B2 (en) 2005-12-02 2008-11-25 Clark Equipment Company Control circuit for an attachment mounting device
US20100189535A1 (en) * 2009-01-27 2010-07-29 John Charles Nye Coupler device to connect bucket or tool to boom arm
US8007197B2 (en) * 2009-01-27 2011-08-30 Nye Manufacturing, Ltd. Coupler device to connect bucket or tool to boom arm
US20120227246A1 (en) * 2009-07-09 2012-09-13 Dawson Francis J Apparatus for connection of an implement to machinery
CN103510558A (zh) * 2012-11-14 2014-01-15 广西柳工机械股份有限公司 装载机侧卸斗
GB2544746A (en) * 2015-11-24 2017-05-31 Caterpillar Work Tools Bv Apparatus and method for assembling work tool to a machine
CN106759576A (zh) * 2015-11-24 2017-05-31 卡特彼勒作业机具有限公司 用于将作业工具组装到机器的装置和方法
EP3176331A1 (de) * 2015-11-24 2017-06-07 Caterpillar Work Tools B. V. Vorrichtung und verfahren zur montage eines arbeitswerkzeugs an eine maschine
US9976277B2 (en) 2015-11-24 2018-05-22 Caterpillar Work Tools B.V. Apparatus and method for coupling work tool to a machine
US10190283B2 (en) * 2015-11-24 2019-01-29 Caterpillar Work Tools B.V. Apparatus and method for coupling a work tool to an arm assembly of a machine
US10106949B2 (en) * 2016-03-18 2018-10-23 Caterpillar Work Tools B.V. Coupler for an implement assembly
CN109235518A (zh) * 2018-09-25 2019-01-18 中铁工程机械研究设计院有限公司 工程机械工具头快换结构及机臂
CN113511569A (zh) * 2021-04-15 2021-10-19 中船第九设计研究院工程有限公司 一种脱钩复位装置及脱钩复位方法
SE2130194A1 (en) * 2021-07-09 2023-01-10 Smp Parts Ab Quick coupling device
WO2023282838A1 (en) * 2021-07-09 2023-01-12 Smp Parts Ab Quick coupling device
IT202200003770A1 (it) * 2022-04-28 2023-10-28 Tm Benne S R L Gruppo attacco rapido per braccio di escavatore
CN115369938A (zh) * 2022-09-22 2022-11-22 钱薛飞 一种快换式铲斗的液压挖掘机

Also Published As

Publication number Publication date
ITGE20000073A0 (it) 2000-05-19
IT1314744B1 (it) 2003-01-03
EP1156161A3 (de) 2002-08-28
ITGE20000073A1 (it) 2001-11-19
EP1156161A2 (de) 2001-11-21

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AS Assignment

Owner name: LAMETER S.R.L., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RICCARDI, GIUSEPPE;REEL/FRAME:011785/0556

Effective date: 20010212

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION