EP2832931B1 - Quick coupler for connection of an implement to a work machine - Google Patents

Quick coupler for connection of an implement to a work machine Download PDF

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Publication number
EP2832931B1
EP2832931B1 EP14178836.4A EP14178836A EP2832931B1 EP 2832931 B1 EP2832931 B1 EP 2832931B1 EP 14178836 A EP14178836 A EP 14178836A EP 2832931 B1 EP2832931 B1 EP 2832931B1
Authority
EP
European Patent Office
Prior art keywords
pin
bolt
detection
connection device
coupling
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.)
Not-in-force
Application number
EP14178836.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2832931A1 (en
Inventor
Davide Cangini
Marco Faedi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cangini Benne SRL
Original Assignee
Cangini Benne SRL
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 Cangini Benne SRL filed Critical Cangini Benne SRL
Publication of EP2832931A1 publication Critical patent/EP2832931A1/en
Application granted granted Critical
Publication of EP2832931B1 publication Critical patent/EP2832931B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • E02F3/3627—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 longitudinal 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
    • E02F3/365—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with redundant latching means, e.g. for safety purposes
    • 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
    • E02F3/3672—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat where disengagement is effected by a mechanical lever or handle
    • 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
    • E02F9/26—Indicating devices
    • E02F9/264—Sensors and their calibration for indicating the position of the work tool
    • E02F9/265—Sensors and their calibration for indicating the position of the work tool with follow-up actions (e.g. control signals sent to actuate the work tool)

Definitions

  • the present invention concerns the field of mechanical connections and relates to a device provided with a safety lock to couple a tool to an operating arm; this connection device is designed to couple mechanical elements of various kinds in a removable manner, and in particular a bucket, or another tool for demolition, for earth movement, for the care of green spaces (and the like) to an arm or to a support of a heavy machine, such as a tractor or a bulldozer.
  • connection devices are provided with a first member stably connected to the tool and with a second member stably connected to the operating support.
  • one side of a member is provided with a transverse pin for coupling a corresponding side of the other member.
  • the two members can rotate mutually like a hinge.
  • a quick coupling device provided with at least one bolt sliding between a first released configuration and a second configuration locking the two members together.
  • connection devices are equipped with elements suitable to reversibly block each bolt in locked condition.
  • the automatic connection devices are also provided with at least one "detector", i.e. a member enabling each bolt to be actuated.
  • a “detector” is a safety device allowing to couple (manually or automatically) the second member to the first member only when this detecting device has been already completely and correctly actuated.
  • the "detector” prevents the operator from unwillingly actuating the bolt device, integral with a member, before this member has been arranged in such a position to allow the complete stop thereof in a respective seat provided on the other member.
  • a quick coupling produced by the Applicant is provided with a bucket detection system with two side detectors that, in the coupling step, are pushed laterally towards the inside of the same coupling causing the release of a cam and consequently making it possible to insert a bolt on the bucket couplings.
  • this system has the problem of being limited by the width of the couplings welded on the bucket and by the side position of the same bucket in the coupling step.
  • connection device according to the prior art is known from EP 1 900 880 , said device comprising the features as recited in the preamble of claim 1.
  • the object of the present invention is to provide a connection device for connecting a tool to an operating arm, that is devoid of the drawbacks described above and that is easy and cost-effective to manufacture; this device being provided with a safety detector.
  • a connection device is provided as claimed in claim 1 for coupling a tool to an operating arm, with further embodiments as claimed -in any one of the dependent claims depending directly or indirectly on the independent claim.
  • number 1 indicates the connection device for connecting a tool U with an operating arm A according to the present invention.
  • the device 1 includes a first member 2 and a second member 3, designed to be fixed, for instance by welding them and/or by means of screws, to the tool U and to the operating arm A respectively ( figure 1 ).
  • the first member 2 and the second member 3 carry respective first coupling means 4 and second coupling means 5 to couple together in a releasable fashion.
  • the first coupling means 4, relating to the first member 2 comprise two hooks arranged laterally and symmetrically with respect to the bucket, while the second coupling means 5, relating to the second member 3, include a bar of substantially round section and indicated in figure 17 with the same reference number for the sake of practicality. This bar 5 is inserted, in use, into the two hooks 4 ( figures 1 , 17 ).
  • the first member 2 comprises two parallel ribs 6 rigidly connected with the tool U and usually welded to it for the sake of practicality.
  • Each rib 6 comprises, in turn, an elongated main body 6A provided at one end with the above mentioned hook 4 and, at the other end, with a respective recess 6B.
  • Each recess 6B is provided with a structural reinforcing transverse element 6C.
  • each rib 6 comprises a respective saddle 6D for the purposes that will be better explained below.
  • Figure 16 shows an exploded view of the second member 3.
  • This second member 3 comprises a carter 13A made, for the sake of practicality, with a folded metal sheet, at one end of which the bar 5 is welded.
  • the carter 13A is closed at the bottom by means of a plate 13B ( figure 16 ).
  • the carter 13A is provided at the top with a box 75 fixed to it in a removable way.
  • a plate 75A containing graphic indications about a head 45A of a pin 45, which can be engaged by a corresponding key 55A provided on an actuating lever 55 ( figure 16 ) (see below).
  • the head 45A projects from the upper surface of the box 75 so as to allow the actuation thereof by means of the above mentioned actuating lever 55.
  • the head 45A is connected with a head 54 by means of a slider-crank mechanism 60 comprising a connecting rod 61 hinged to two cranks 62, 63, each of which is integral with a respective head 45A, 54. It should be noted that the head 54 and the slider-crank mechanism 60 are completely inside the box 75 while, as already said, the head 45A projects from the upper surface of this box 75.
  • box 75 is integral with the carter 13A and that the two heads 54 and 45A may only rotate and cannot translate with respect to both the box 75 and the carter 13A.
  • each free end of each shaped element 14 projecting from the carter 13A has a beak 14A ( figures 16 , 17 ).
  • Each beak 14A is provided with a horizontal surface 14A*, which ends with a respective vertical stop 14A** ( figure 16 ).
  • a vertical plate 15 extends between the two shaped elements 14 and closes the carter 13A at the side facing the beaks 14A.
  • Two through holes 16 are arranged on the vertical plate 15, each of which is engaged, in use, by a respective stem 20 supporting a respective elastic member 21 (a spring in figures 4 , 8 , 10 and 14 ) in a sliding manner.
  • a respective transverse projection 25 projects from each shaped element 14 towards the outside (the exploded view of figure 16 shows only one of them) and engages, in use, a respective saddle 6D ( figure 17 ). It has been noted that a further coupling area between the two members 2, 3 constituted by the transverse projections 25 inserted in the saddles 6D allows a better distribution of the forces transmitted from the working tool U to the operating arm A.
  • the detection device 30 is essentially a safety device allowing the member 3 to couple automatically to the member 2 only when this detection device has been completely and correctly actuated, i.e. only if the side projection 25 containing it rests completely and correctly on the respective saddle 6D.
  • each stem 20 actually passes through the respective through hole 16, a first end 21A of the respective elastic member 21 rests on a slide 41, while a second end 21B rests on the inner surface f the vertical plate 15.
  • slide 41 is inside the carter 13A.
  • a bolt 22 with transverse bar is fixed in a known manner to the ends 20A of the stems 20.
  • Each end of the bolt 22 is provided with a respective groove 22A, whose use will be explained below.
  • the bolt 22 is made integral with the slide 41 by means of the two stems 20 fixed to these elements by means of screws. It should be noted that the bolt 22 extends parallel to a second direction (Z) transverse to a first direction (Y) ( figure 16 , 17 ).
  • each elastic member 21 has the function of (automatically) actuating the bolt 22 when the detection device 30, pushing on an inner cam 35, moves it from the coupling position (see below).
  • the shaped elements 14, the ribs 6 and the stems 20 extend parallel to the first direction (Y) ( figure 16 , 17 ).
  • the detection device 30 opens (see below) the bolt 22, belonging to the member 3, only when this latter is in such a position to allow it to be completely stop in a respective seat provided on the other member (see below).
  • the detection device 30 comprises two substantially perpendicular pins 31, 32, coupled together by means of inclined surfaces 31A, 32A ( figure 7 ), so that a vertical movement downwards of the pin 31, i.e. a movement according to the arrow F1, turns into a horizontal movement of the pin 32 from the left to the right, i.e. according to the arrow F2.
  • the vertical movement of the pin 31 causes the horizontal actuation of the pin 32 due to the mutual sliding of the inclined surfaces 31A, 32A over each other.
  • the two pins 31, 32 of the detection device 30 are housed in a seat 33 provided inside the side projection 25.
  • Each pin 31, 32 is provided with a respective slot 31B, 32B, inside which a guide element 31C, 32C slides ( figure 16 ).
  • the end 34 of the pin 32 is into contact with the cam 35, which belongs to a mechanism 40 for actuating a locking movable equipment comprising the bolt 22 (see below).
  • the detector 30 and the pin (pushing element) 32 of the cam 35 are coupled together by sliding the two inclined surfaces 31A, 32A causing the change in the movement direction.
  • a different system (not shown) can be used instead of this one, providing for the intermediate use of a connecting rod pivoted between detector 30 and pin 32.
  • this mechanism can cause the change in the movement direction.
  • a further possible intermediate element may be constituted by a toothed wheel or the like, causing the change in the movement direction.
  • the movement direction can be changed by means of a movable element rotating around a fixed fulcrum.
  • the actuating mechanism 40 comprises the slide 41 and a pivot pin 47 ending with the head 54 ( figure 17 ).
  • the pivot pin 47 has (from the top downwards) a first segment 47A with polygonal cross section, followed by a second segment 47B with round cross section and ending with an end portion 47C.
  • the pivot pin 47 has an axis of rotation that is fixed with respect to the carter 13A, while the slide 41 is movable from the bottom upwards in the direction indicated by the arrow F3 of figure 4 .
  • the whole pivot pin 47 engages a through hole 78 provided on the upper surface of the carter 13A ( figure 16 ).
  • first segment 47A of the pivot pin 47 is engaged, in use, in a through hole 79 (provided on the cam 35) having the same polygonal cross section.
  • a prismatic coupling is provided between the first segment 47A of the pivot pin 47 and the corresponding through hole 79.
  • the second segment 47B is housed, in use, in a groove 41Q provided on the slide 41 ( figure 16 ), while the end portion 47C is housed in a hole of the plate 13B visible in figure 16 .
  • the slide 41 can freely slide according to the direction indicated by the arrow F3 of figure 4 in its seat provided in the carter 13A and is guided by the second segment 47B and by the end portion 47C, that are always in the groove 41A.
  • the slide 41 has a blind hole 41B to house partially a pin 79A ( figure 16 ) whose upper part (projecting with respect to the upper surface of the slide 41) is coupled to a bush 80, which is designed to rotate freely with respect to the pin 79A.
  • the bush 80 can rotate freely around the vertical axis of the pin 79A.
  • cam 35 is elastically connected with the slide 41 by means of a further elastic member 65 as shown for instance in figure 4 .
  • the cam 35 has inside itself a shaped groove 35A for guiding the bush 80 and has, on its outer profile, an appendix 35B, whose function will be explained below.
  • this shaped groove 35A there are visible an initial seat 66 ( figure 4 , 8 ) for completely releasing the bolt 22 where the bush 80 is initially; a final seat 67 ( figure 10 ) for completely locking the bolt 22, where the bush 80 is at the end of the closing operations; a set of adjacent safety recesses 68, 69 for safety stop.
  • the initial seat 66 is provided with a projection 66', only shown in figures 10 and 14 .
  • This projection 66' defines an obstacle for the free motion of the bush 80 inside the shaped groove 35A, and allows to stabilize the position of the cam 35 when this latter is, in use, in the position illustrated in figure 4 , and allows thus to maintain the bolt 22 completely extracted. It should be noted that this configuration is particularly critical for the connection device 1, as in this configuration ( figure 4 ) the connection device 1 is "armed”, i.e. the elastic members 21 are pushed (elastically loaded). In this configuration the bush 80 engages the initial seat 66 where it is kept in position by means of the projection 66' and is therefore not visible, as it is hidden by the head 45A. The projection 66' has therefore the function of maintaining the connection device 1 "armed” as defined above.
  • the "actuating mechanism 40" (of the "locking movable equipment 90") _is defined _as the set of the following elements:
  • the cam 35 and the slide 41 are coupled together by means of both the elastic member 65 and the sliding coupling between the bush 80 (carried by the slide 41) and the shaped groove 35A provided in the same cam 35.
  • the appendix 35B of the cam 35 has the function of blocking the movement of the locking movable equipment 90, in the configuration illustrated in figure 4 , where an appendix 35B of the cam 35 rests on a stop 70 specifically designed inside the carter 13A, even if an operator tries to rotate the head 45A (and thus the head 54) in counter-clockwise fashion by means of the lever 55.
  • the rotation of the cam 35 causes a similar rotation of the pin 47 and of the head 54 thereof.
  • the counter-clockwise rotation of the head 54 is transmitted to the head 45A by means of the above mentioned slider-crank mechanism 60.
  • connection device 1 is therefore that illustrated in figure 8 , where the movable equipment 90 moves backwards according to the arrow F3 of figure 4 and the bolt 22 moves in the same direction and inserts partially in the recesses 6B. At the same time the lower face of the bolt 22 rests also on the two beaks 14A.
  • the key 55a can be used to manually open (release) the connection device 1, a step in which energy is stored in the two springs 21.
  • connection device 1 is in safety condition, i.e. the forces acting on it tend to release the bolt 22 from the seats 6B, but the elastic member 65 returns the cam 35 so that the bush 80, even if it exits from the final seat 67, slides on the shaped profile 35A and engages one of the two safety recesses 68, 69, without this bush 80 achieving, for instance, a dangerous intermediate position like that shown in figure 8 , where the connection device 1 has not been yet completely and correctly inserted.
  • connection device is the fact that the actuation of the detector 30 is independent of the width of the couplings welded on the bucket and also when the bucket is in side position in the coupling step.
  • the detector 30 can be quickly and safely actuated under any wear conditions of the couplings, and without the need for maintenance of these couplings.
  • the elastic members 21 and 65 are usually provided by means of helical torsion springs as in figure 4 and in the other figures where they have been shown but these components can be also replaced by different components having the same function, without limiting the scope of the present invention.

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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)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Surgical Instruments (AREA)
EP14178836.4A 2013-07-29 2014-07-28 Quick coupler for connection of an implement to a work machine Not-in-force EP2832931B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000410A ITBO20130410A1 (it) 2013-07-29 2013-07-29 Dispositivo di connessione di un utensile ad un braccio di azionamento

Publications (2)

Publication Number Publication Date
EP2832931A1 EP2832931A1 (en) 2015-02-04
EP2832931B1 true EP2832931B1 (en) 2017-06-28

Family

ID=49447599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14178836.4A Not-in-force EP2832931B1 (en) 2013-07-29 2014-07-28 Quick coupler for connection of an implement to a work machine

Country Status (2)

Country Link
EP (1) EP2832931B1 (it)
IT (1) ITBO20130410A1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2704669C1 (ru) * 2019-03-11 2019-10-30 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тихоокеанский государственный университет" Ковш экскаватора

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700059602A1 (it) * 2017-05-31 2018-12-01 Dispositivo di accoppiamento

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
DE59800510D1 (de) * 1997-04-14 2001-04-12 Baumaschinentechnik Gmbh Villa Schnellwechselvorrichtung für bagger
EP1316649B1 (en) * 2001-11-28 2007-01-03 Brokk Aktiebolag A device for detachably coupling an implement to a vehicle
SE523299C2 (sv) * 2002-07-15 2004-04-06 Stock Of Sweden Ab Anordning för hopkoppling av ett redskap till en redskapsbärare
SE524941C2 (sv) * 2003-02-17 2004-10-26 Oilquick Ab System innefattande redskapsfäste och arbetsredskap
ITBO20040531A1 (it) * 2004-08-20 2004-11-20 Cangini Benne Srl Dispositivo di sicurezza per la connessione di utensili
ITBO20060631A1 (it) * 2006-09-12 2008-03-13 Cangini Benne Srl Dispositivo per connettere un utensile ad un mezzo di azionamento.
IES20070351A2 (en) * 2007-05-14 2008-04-16 Geith Patents Ltd A coupler for the working arm(s) of an excavator or the like
AT507598B1 (de) * 2008-12-05 2012-03-15 Wacker Neuson Linz Gmbh Vorrichtung zum auswechselbaren aufnehmen von werkzeugen
GB2466646A (en) * 2008-12-31 2010-07-07 Quick Switch Safety System for a Quick Hitch Coupler
IT1392648B1 (it) * 2009-01-23 2012-03-16 Malacrino Dispositivo di attacco rapido, particolarmente per macchine operatrici
GB2486887A (en) * 2010-12-21 2012-07-04 Miller Int Ltd Quick coupler status alarm
CA2733965A1 (en) * 2011-03-14 2012-09-14 Brandt Industries Ltd. Compact quick coupling mechanism for tool attachment

Non-Patent Citations (1)

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Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2704669C1 (ru) * 2019-03-11 2019-10-30 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тихоокеанский государственный университет" Ковш экскаватора

Also Published As

Publication number Publication date
ITBO20130410A1 (it) 2015-01-30
EP2832931A1 (en) 2015-02-04

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