EP0615023A1 - Gerät zum rotationsfähigen Einbau eines Arms oder dergleichen zwischen zwei Teilen eines gabelförmigen Elementes - Google Patents

Gerät zum rotationsfähigen Einbau eines Arms oder dergleichen zwischen zwei Teilen eines gabelförmigen Elementes Download PDF

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Publication number
EP0615023A1
EP0615023A1 EP94400509A EP94400509A EP0615023A1 EP 0615023 A1 EP0615023 A1 EP 0615023A1 EP 94400509 A EP94400509 A EP 94400509A EP 94400509 A EP94400509 A EP 94400509A EP 0615023 A1 EP0615023 A1 EP 0615023A1
Authority
EP
European Patent Office
Prior art keywords
chamber
connecting rod
rod
volumes
end piece
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.)
Withdrawn
Application number
EP94400509A
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English (en)
French (fr)
Inventor
Jean-Marie Gérard René Koehl
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0615023A1 publication Critical patent/EP0615023A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • E02F9/006—Pivot joint assemblies

Definitions

  • the present invention relates to devices for assembling in rotation an arm or the like with and between two branches of a fork-shaped part or the like, and more particularly those which find an advantageous application in the field of machines or machines for public works, for example backhoes.
  • Such an assembly is used in particular in the field of machines for public works, for example for coupling the arm of a backhoe with the attachment fork of the bucket.
  • This assembly is obtained by means of a shaft which crosses the arm and the two branches of the fork, and it is obvious that, during the operation of the machine, all the elements constituting the assembly are subjected to considerable repeated forces. . It follows that they take up play very quickly with respect to each other, which causes rapid wear, in particular, of the shaft and the bearings in which it is mounted, until the connections are destroyed in assembly.
  • the object of the present invention is therefore to produce a device for assembling in rotation an arm or the like with and between two branches of a fork-shaped part or the like, which limits the drawbacks mentioned above.
  • Figure 1 shows a system for rotating assembly of an arm 1 or the like with and between two branches 2, 3 of a fork-shaped part 4 or the like which finds an advantageous application in the field of machines or machines for public works, for example excavators, the arm 4 being for example that which allows the manipulation of a bucket of which the fork 4 is a part.
  • FIG. 2 Such an assembly according to the prior art is illustrated in FIG. 2. It is obtained by means of a shaft 8 which crosses the arm 1 and the two branches 2, 3 of the fork 4 passing through a through-hole 5 made in the arm and the two branches, and through a ball bearing 9 located in the opening 5, between the arm 1, the shaft 8 and the two branches 2, 3 of the fork.
  • a shaft 8 which crosses the arm 1 and the two branches 2, 3 of the fork 4 passing through a through-hole 5 made in the arm and the two branches, and through a ball bearing 9 located in the opening 5, between the arm 1, the shaft 8 and the two branches 2, 3 of the fork.
  • FIGS. 3 to 7 largely overcomes the drawbacks of the assembly system illustrated in FIG. 2, FIGS. 3, 4 and 6 representing only part of a device according to the invention because the device as a whole generally has an axial symmetry.
  • the present invention relates to a device for assembling in rotation an arm 1 with and between two branches 2, 3 of a piece in the shape of a fork 4 or the like, the arm comprising a through hole 5 along an axis 6.
  • the device comprises two cages 10, 11 mounted in cooperation respectively with each branch 2, 3 of the fork 4 and centered on the axis 6.
  • Each cage has two first 12 and second 13 flanges, and means 14 for rotating the second flange 13 relative to the first flange 12 around the axis 6.
  • these means 14 can be constituted by a ball bearing or the like which is, for example, housed between two shoulders produced on each of the of them flanges, as in Figures 3 and 4.
  • the first flange 12 is produced in an element independent of the branch with which it is associated, this element being secured to the branch by any means, bolting, welding or the like. But it can also be produced directly in the branch 2, 3 by machining the fork 4 itself.
  • the second flange 13, which can pivot relative to the first 12, comprises a first 15 of the two parts of a socket 16 advantageously, as illustrated, of the male-female type.
  • the device further comprises a shaft 20 having a longitudinal axis which is advantageously coincident with the axis 6. This shaft is mounted in the through hole 5, FIG. 4.
  • the shaft 20 has two end pieces 21, 22, only one being visible in FIGS. 3 and 4.
  • Each end piece comprises the second part 23 of the socket 16 of the male-female type, this part 23 being complementary to the first part 15 , and a connecting rod 30 connected, by its two ends 31, 32, to the two end pieces 21, 22.
  • the first part 15 of the socket 16 produced on the second flange 13 is constituted by a recessed housing 17 of revolution around the axis 6, the second part 23 of this interlocking produced on the endpiece 21, 22 being constituted by a male part 24 of interlocking which is substantially complementary to said recessed housing 17.
  • the interlocking 16 is, as illustrated, a conical type interlocking 18.
  • the device further comprises means 40 for controlling the movement of at least one of the two said ends 21, 22 relative to the rod 30 so as to bring the two parts 15, 23 of the socket 16 in cooperation l 'one in the other.
  • These means 40 for controlling the movement of at least one of the two end pieces 21, 22 relative to the rod 30 can be produced in different ways. However, preferably, they comprise a chamber 41 of shape substantially of revolution around the axis 6 produced in the end piece, one end 31, 32 of the rod plunging into this chamber, and means 50 for controlling the movement of said end 31, 32 of the rod plunging into the chamber 41 relative to the wall 42 of the chamber.
  • these means 50 can be constituted by a first thread from the end of the rod plunging into the chamber and by a second thread complementary to the first made on the lateral part of the wall 42 of the chamber, the two threads cooperating one in the 'other, and by means for controlling the rotation of one of the elements, tip 21, 22 and end 31, 32 of the rod 30 plunging into the chamber 41, relative to the other.
  • These means can be constituted, for example, by key sockets or the like made on the end face of the endpiece which appears through orifices made in the two flanges 12 and 13.
  • the embodiment of the means 50 can have advantages in certain cases. However, the embodiment illustrated in FIGS. 3 and 4 will be preferred, in particular for the application of the assembly device to public works vehicles.
  • the means 50 for controlling the movement of the end 31, 32 of the rod plunging into the chamber with respect to the wall 42 of the chamber are constituted by a piston 43 integral from the end 31, 32 of the rod plunging into the chamber through a sealed passage 35, the piston 43 being slidably mounted in a sealed manner in the chamber 41 to define two first 44 and second 45 variable volumes thereon as a function of the displacement of the piston 43 in the chamber, and controllable means 60 for selectively supplying hydraulic fluid to the first and second volumes 44, 45 and obtaining the displacement of the nozzle relative to the rod 30 as will be described below.
  • These means 60 comprise for example conduits produced in the rod and connecting the two volumes to a source of pressurized fluid via, for example, a controllable distributor in order to be able to supply at will one or the other volume 44, 45 and obtain thus the displacement of the piston 43 in the chamber 41 in one direction or the other.
  • a source of fluid supply for these two volumes can be that of the backhoe itself which supplies the others cylinders that operate it for the work for which it is intended.
  • the end pieces 21, 22 can be made in one piece but, to obtain a better coupling of the shaft 20 with the cages 10, 11, they are advantageously constituted as described below.
  • the end piece 21, 22 consists of two first 25 and second 26 pieces, the first piece 25 being slidably mounted in the second 26 in a direction having at least one component parallel to the axis 6.
  • the preferred embodiment is that where these two parts are slidably mounted one inside the other along an axis of displacement coincident with the axis 6.
  • Means 27 are also provided for applying an elastic force between the two first and second parts 25, 26. These elastic means are arranged to tend to distance these two parts from one another along their sliding axis. An advantageous embodiment of these elastic means 27 will be given below.
  • the device can already give good results.
  • it also comprises means 61 for applying an elastic force between at least one of the two end pieces 21, 22 and the internal wall 7 of the opening 5 made in the arm 1.
  • the elastic means 27 and 61 can be produced by separate elements but, in the advantageous embodiment illustrated, they consist of a ring 28 made of a material having a certain resilience, this ring 28 being mounted around the first part 25 between two stops 46, 47 respectively produced on the first and second parts 25, 26.
  • This ring 28 and these stops 46, 47 can be of different shapes, but, as illustrated in the two figures 3 and 4, the ring 28 preferably has the shape of a ring whose section defined in a longitudinal plane is of substantially triangular shape. and the two stops 46, 47 are defined by oblique faces forming a groove of variable width and capable of coming into contact with the ring while being turned towards the internal wall 7 of the through-hole 5 made in the arm 1.
  • the device also comprises stop means 55 to limit the sliding of the first part 25 relative to the second 26.
  • stop means 55 can be of any type. They are for example constituted, as illustrated, by a bolt 55 screwed into the first part 25 passing through an orifice made in the end of the second part 26 and the head of which can limit the sliding of the two parts one by compared to each other.
  • the assembly device according to the invention works as follows:
  • the shaft 20 is plugged into the through-hole 5 made in the arm while its length is as short as possible.
  • the two volumes 45 are only supplied with hydraulic fluid so that the two end pieces are as close as possible to each other and to the middle of the rod, it being understood that the length of the shaft in its position the shorter is less than the distance between the two legs 2, 3 of the fork and that the length of the rod is determined according to the intended use of the device.
  • the arm 1 comprising the shaft disposed in the breakthrough 5 can be brought between the two branches of the fork so that the two end pieces 21, 22 are positioned opposite the recesses 17 of the first parts 15 of nesting 16.
  • the fork 4 can pivot relative to the arm 1, for example under the action of a control jack, owing to the fact that the first flange 12 which is integral with the fork can pivot with respect to the second flange 13 which has become integral with the arm, thanks to the ball bearing 14.
  • the assembly device makes it possible to carry out the rotational assembly of the arm 1 with the branches 2, 3 of the fork 4 without any manual intervention, the assembly can indeed be done automatically by using the possibilities of supplying hydraulic fluid existing on board the machine itself.
  • the device has the very important advantage of being able to compensate for the mechanical play as it occurs during the use of the machine when it is working. Indeed, if a play begins to occur at the connection between the arm and the fork, the operator of the machine can replenish the two volumes 44 with hydraulic fluid, which has the effect of perfecting the blocking of the end pieces in the second flanges 13 and bring the stops 46 and 47 closer together. The swelling of the ring 28 will increase and force the ring to press again against the internal wall 7 of the breakthrough with the same intensity as before the appearance of the play.
  • This advantage gives the assembly device according to the invention a much longer service life than that of the assembly systems of the prior art such as that which is described with reference to FIG. 2, since the play can be compensated as soon as its appearance, almost continuously and automatically.
  • This feature is very important because we know that the game grows very quickly as soon as it starts to appear. Insofar as it can be compensated as soon as it appears, the usual wear of the elements constituting the device is reduced.
  • FIGS. 5 to 7 relate to other embodiments of the device which, for certain applications, may be more advantageous than those described above.
  • the connecting rod 30 is constituted by a central body 62 comprising a second chamber 63, at least one first connecting rod 64, first means 65 for connecting a first end 66 of this first connecting rod to the first end piece 21, its other second end 67 plunging into the second chamber 63, and means 68 for connecting this second end 67 with this second chamber.
  • the means 40 for controlling the movement of the first end piece 21 (or 22) relative to the connecting rod 30 are constituted by a second piston 69 secured to the second end 67 of the first connecting rod 64, the means 68 for link the connecting rod with the second chamber then being constituted by a sealed passage made in the wall 70 of this chamber 63.
  • a sealed passage is well known to those skilled in the art and does not pose any difficulty for them.
  • the piston 69 is slidably mounted in the second chamber in order to define two third 71 and fourth 72 variable volumes therein as a function of the displacement of the second piston in this second chamber 63.
  • the device also comprises controllable means 73 for selectively supplying hydraulic fluid these third 71 and fourth 72 volumes in order to vary their value as a function of the quantity of hydraulic fluid which is introduced into it by means, for example, of a distributor supplied by a pump for pressurizing a reserve of hydraulic fluid like oil or the like which, as in the case of application recalled above with reference to FIGS. 3 and 4, can be constituted by that of the backhoe.
  • these means 73 for selectively supplying hydraulic fluid to the third and fourth volumes comprise at least two conduits 74, 75 for supplying these two volumes on either side of the piston 69.
  • these conduits are at least partially produced in the wall 70 of the central body 62.
  • FIG. 6 A preferred embodiment is thus more particularly illustrated in FIG. 6, in which the central body 62 comprises two walls 76, 77 which are advantageously cylindrical and substantially concentric. These two walls define, respectively between their outer side 78 and inner side 79, an annular space 80, a portion 81 at least of one of the two conduits 74, 75, for example the conduit 74, being constituted by this space 80 which leads into volume 71 ( Figure 6).
  • a single end piece 21 or 22 is movable relative to the rod 30.
  • the two end pieces 21, 22 are both movable relative to the rod 30.
  • the device according to the embodiments illustrated in Figures 5 to 7 further comprises a third piston 82 slidably mounted in the second chamber 63 to define a second pair of third 71 and fourth 72 variable volumes depending on its movement in the second chamber 63, a second connecting rod 83, means for connecting a first end of this second connecting rod to the second end piece 22 and second means for connecting the second end of the second connecting rod to the third piston.
  • This device also includes controllable means for selectively supplying hydraulic fluid to the third and fourth volumes of this second torque in order to move the third piston in the second chamber 63.
  • controllable means for selectively supplying hydraulic fluid to the two pairs of third and fourth volumes comprise two pairs of conduits opening respectively into the two couples of third and fourth volumes and respectively connected to two supply ports 84, 85 of hydraulic fluid, FIG. 7.
  • the two supply vents 84, 85 are advantageously located substantially in the middle of the central body 62, which facilitates their accessibility and their connection to the source of pressurized fluid via a distributor when such a device is used on a public works, for example a backhoe.
  • the chamber 63 is in two separate parts separated by a middle wall.
  • this chamber may be advantageous for this chamber to be in one piece as illustrated in FIG. 7.
  • the two fourth volumes 72 of the two couples defined above form only one.
  • the device comprises, as described above with reference to Figures 3 and 4, means 61 for applying an elastic force between the first end piece 21 (or 22) and the inner wall 7 of the opening 5 made in the arm 1.
  • the first means 65 for connecting a first end 66 of the first connecting rod 64 to the first end piece 21 are constituted by a part of the first end 66 of the connecting rod slidingly mounted in the end piece 21, a shield 86 secured of the connecting rod and located between the end piece 21 and the central body 62, and the means 61 are then constituted by a ring 87 made of an elastic material interposed between two stops respectively produced on the first end piece and the shield.
  • An identical arrangement is provided for the other end piece 22.
  • the two rings 28, 87 present in the embodiments of the device according to the invention described above make the assembly even more reliable by ensuring blocking the shaft 20 in the breakthrough 5. They then also have the advantage of preventing the shaft 20 from pivoting relative to the wall 7 of this breakthrough, and therefore of limiting the wear of this shaft and the rapid onset of play.
  • hydroaulic fluid has been used by way of example, but that it is quite obvious that any liquid or gaseous fluid such as oil or compressed air can be used, the fluid being chosen as a function of that which is available on the machine capable of receiving the assembly device described above.

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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)
  • Pivots And Pivotal Connections (AREA)
EP94400509A 1993-03-10 1994-03-09 Gerät zum rotationsfähigen Einbau eines Arms oder dergleichen zwischen zwei Teilen eines gabelförmigen Elementes Withdrawn EP0615023A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9302751 1993-03-10
FR9302751A FR2702526B1 (fr) 1993-03-10 1993-03-10 Dispositif d'assemblage en rotation d'un bras ou analogue avec et entre deux branches d'une pièce en forme de fourche.

Publications (1)

Publication Number Publication Date
EP0615023A1 true EP0615023A1 (de) 1994-09-14

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EP94400509A Withdrawn EP0615023A1 (de) 1993-03-10 1994-03-09 Gerät zum rotationsfähigen Einbau eines Arms oder dergleichen zwischen zwei Teilen eines gabelförmigen Elementes

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EP (1) EP0615023A1 (de)
FR (1) FR2702526B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995021969A1 (en) * 1994-02-09 1995-08-17 Raunisto, Airi Quick coupling assembly
WO2000049233A1 (en) * 1999-02-19 2000-08-24 Raunisto, Airi Quick-coupling assembly
EP1258567A1 (de) * 2001-05-18 2002-11-20 Korea Institute Of Machinery & Materials Schnellwechselvorrichtung für einen Bagger
EP1672126A2 (de) 2004-12-14 2006-06-21 PMI Padana Macchine Industriali S.p.A. Hydraulische Vorrichtung und Verfahren zum Einstecken und zum Herausziehen von Stiften in/aus zusammengefügten Ausleger von Erdbewegungsmaschinen.
NL2007954C2 (en) * 2011-12-12 2013-06-13 Rusch B V A coupling for coupling first and second machine members together, machine assembly and method of assembly thereof.
EP2824243A1 (de) * 2013-07-10 2015-01-14 Cangini Benne S.R.L. Schnellkupplung und zugehörige Verbindung an einer Werkzeug einer Arbeitsmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589780A (en) * 1969-05-13 1971-06-29 Gkn Engineering Ltd Bearings
NL7900631A (nl) * 1979-01-26 1980-07-29 Interparts B V Inrichting voor het vastzetten van de giek van een hydraulische kraan aan een graafbak of dergelijke.
DE4102370A1 (de) * 1990-02-12 1991-08-14 Walter Fritzel Loeffelbagger
EP0448788A1 (de) * 1990-03-30 1991-10-02 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Schnellwechselvorrichtung für einen Bagger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589780A (en) * 1969-05-13 1971-06-29 Gkn Engineering Ltd Bearings
NL7900631A (nl) * 1979-01-26 1980-07-29 Interparts B V Inrichting voor het vastzetten van de giek van een hydraulische kraan aan een graafbak of dergelijke.
DE4102370A1 (de) * 1990-02-12 1991-08-14 Walter Fritzel Loeffelbagger
EP0448788A1 (de) * 1990-03-30 1991-10-02 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Schnellwechselvorrichtung für einen Bagger

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995021969A1 (en) * 1994-02-09 1995-08-17 Raunisto, Airi Quick coupling assembly
US5802753A (en) * 1994-02-09 1998-09-08 Raunisto; Yrjoe Quick coupling assembly
WO2000049233A1 (en) * 1999-02-19 2000-08-24 Raunisto, Airi Quick-coupling assembly
EP1258567A1 (de) * 2001-05-18 2002-11-20 Korea Institute Of Machinery & Materials Schnellwechselvorrichtung für einen Bagger
EP1672126A2 (de) 2004-12-14 2006-06-21 PMI Padana Macchine Industriali S.p.A. Hydraulische Vorrichtung und Verfahren zum Einstecken und zum Herausziehen von Stiften in/aus zusammengefügten Ausleger von Erdbewegungsmaschinen.
EP1672126A3 (de) * 2004-12-14 2007-06-06 PMI Padana Macchine Industriali S.p.A. Hydraulische Vorrichtung und Verfahren zum Einstecken und zum Herausziehen von Stiften in/aus zusammengefügten Ausleger von Erdbewegungsmaschinen.
NL2007954C2 (en) * 2011-12-12 2013-06-13 Rusch B V A coupling for coupling first and second machine members together, machine assembly and method of assembly thereof.
EP2824243A1 (de) * 2013-07-10 2015-01-14 Cangini Benne S.R.L. Schnellkupplung und zugehörige Verbindung an einer Werkzeug einer Arbeitsmaschine
EP3312350A1 (de) * 2013-07-10 2018-04-25 Cangini Benne S.R.L. Vorrichtung für die kupplung zwichen arm und werkzeug einer arbeitsmaschine

Also Published As

Publication number Publication date
FR2702526A1 (fr) 1994-09-16
FR2702526B1 (fr) 1995-05-24

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