EP0467837B1 - Kupplung eines Arbeitsvorsatzes an den Arbeitsarm einer Erdbaumaschine - Google Patents

Kupplung eines Arbeitsvorsatzes an den Arbeitsarm einer Erdbaumaschine Download PDF

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Publication number
EP0467837B1
EP0467837B1 EP91810540A EP91810540A EP0467837B1 EP 0467837 B1 EP0467837 B1 EP 0467837B1 EP 91810540 A EP91810540 A EP 91810540A EP 91810540 A EP91810540 A EP 91810540A EP 0467837 B1 EP0467837 B1 EP 0467837B1
Authority
EP
European Patent Office
Prior art keywords
end piece
tool
connection
ramps
catches
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.)
Expired - Lifetime
Application number
EP91810540A
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English (en)
French (fr)
Other versions
EP0467837A1 (de
Inventor
Etienne Moinat
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
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0467837A1 publication Critical patent/EP0467837A1/de
Priority to US08/174,383 priority Critical patent/US5394630A/en
Application granted granted Critical
Publication of EP0467837B1 publication Critical patent/EP0467837B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02F3/364—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using wedges

Definitions

  • the object of the present invention is to fix a tool at the end of a site machine arm provided with an articulated end piece intended to receive the tool, in which the end piece is provided with two pairs of projections profiles each having a ramp inclined in the direction of engagement of the end piece in the tool, the projections of the end piece engaging under two pairs of corresponding projections, also provided with tool ramps, the ramps of the end piece coming to bear on the ramps of the tool, during the engagement of the end piece in the tool, the ramps of the tool having relative to the tool an inclination identical to that of the ramps of the end piece relative to the end piece, the fixing comprising a locking member of the end piece on the tool, that the pair of profiled projections of the end piece are formed on two lateral faces parallel to the end piece, that the pairs of protrusions of the tool are formed on the sides of two parallel ribs, the spacing of which corresponds to the width of the end piece, and that the fixing also comprises mechanical means maintaining a prestress on the locking member, this preload now pushing on
  • Such attachment is known from DE-U-90 00 721.
  • the end piece is provided with two pairs of projections in the form of hooks penetrating by cutouts in the bottom of the tool to engage, by moving forward, under ramps provided on the inside of the bottom of the tool.
  • the attachment is locked by latches engaged in the cutouts through which the pair of front hooks pass. These locks are engaged with play between the hooks and the cutouts and therefore have only a safety function.
  • a slight setback of the end piece relative to the tool can occur in particular each time the tool is used in a scraper. This play results in violent shocks on the fixing hooks, shocks likely to cause the breakage of the hook attachment to the end piece.
  • Document WO-A-8504917 discloses a fixing in which the end piece and the tool are provided with projections having ramps by which the end piece and the tool are engaged and fixed one inside the other.
  • the face of the tool opposite the workpiece terminal has two transverse projections provided with opposite ramps and facing one another defining a dovetail profile, while the terminal part has a transverse projection homologous to the rear projection of the tool and two moving parts on oblique guides coming to engage under the ramp of the anterior projection of the tool to fix the assembly.
  • the object of the present invention is to provide a secure fastening, with automatic backlash, which does not require a jack and which has a space requirement and as low a dead weight as possible.
  • the binding according to the invention is defined in claim 1.
  • the play is automatically caught up by a slight displacement of the ramps one on the other under the effect of the locking means exerting a permanent pressure in the direction of the engagement of the projections in each other.
  • the protrusions can be formed very close to the points of articulation of the end piece, on the one hand, and of the tool, on the other hand, which makes it possible not only to reduce the size of the fixing, but also reduce the distances between the articulation axes of the end piece and the tool, which results in better use of forces.
  • the dead weight of the fastening means is also reduced to a minimum.
  • the locking member may consist of a simple transverse bar retained by a tie rod.
  • FIG. 1 is a partial view, in photographic perspective, of the end of a construction machine arm and of a bucket intended to be fixed at this end.
  • FIG. 1 shows the same elements being fixed.
  • Figure 3 is a detail view showing the elements of Figure 2 in the direction of arrow A, after full engagement of the profiled parts.
  • Figure 4 is a perspective view of the locking and pressure means.
  • Figure 5 is a detail view of Figure 3, from a slightly different angle, after installation of the locking means.
  • Figure 6 shows, by way of example, the attachment of another tool, in this case a hydraulic hammer.
  • Figure 7 shows a second embodiment of the locking means.
  • Figures 1 and 2 show the end piece 1 hinged to the end of a conventional construction machine arm.
  • This end piece 1 is articulated, in a known manner, on the one hand, at the end of an arm 2 by means of an axis 3 and, on the other hand, to two connecting rods 4 and 5 by means of a axis 6, the connecting rods 4 and 5 being articulated themselves to the arm 2 by two connecting rods 7 and 8 ( Figure 6) and at the end of a hydraulic cylinder 9 in a conventional manner.
  • the end piece 1 has a rectangular front planar face 10 parallel to the axes 3 and 6. This face can be cut to reduce the weight of the end piece 1.
  • Each of the side faces of the end piece 1 is provided with two lateral projections 11 and 12 in the shape of a right triangle whose long side is in the plane of the front face 10. Each projection therefore defines a ramp such that the ramps 13 and 14 visible in FIGS. 1 and 2 and the ramps 15 and 16 of the two visible opposite projections in Figure 6.
  • the tool in this case a bucket 17, has two parallel ribs 18 and 19 whose spacing corresponds to the width of the end piece 1. These ribs are each provided with two projections 20, 21 and 22, 23 directed towards interior and also presenting ramps such as 24 and 25 whose inclination relative to the flat face 26 of the tool is identical to the inclination of the ramps 13 and 16 relative to the front face 10 of the end piece 1. The distance between the ramps the same pair is greater than the length of the projections 11 and 15 so as to allow the passage of these projections 11 and 15 between the projections 20 and 21. It should also be noted that the ramps 24 of the anterior projections 20 of the tool 17 are cut by a chamfer 27 and that the lateral faces opposite the corresponding projections 20 have a boss 28.
  • the end piece 1 also has, near its front face 10, a hole 29 parallel to the front face.
  • the ribs 18 and 19 of the tool 17 have two opposite rectangular holes 30 and 31 used, with the threaded hole 29 for locking the fixing, as will be described later.
  • the central part 32 carries a screw 37 intended to exert a prestress on the locking device.
  • the fixing takes place as follows: The bucket 17 being placed on the ground, the end piece 1 is engaged between the ribs 18 and 19 of the bucket 17, first of all perpendicular to the face 26 of the bucket, the projections 13 and 15 engaging between the projections 20 and 21, and, respectively 22 and 23, then substantially parallel to the plane 26, in the direction of the arrow F, as shown in FIG. 2.
  • the bosses 28 (FIG. 1) have the effect of eliminating the lateral play of the end piece 1 in the tool.
  • the locking and pressure device is then put in place by introducing the end of the arms 33 and 34 into the holes 30 and 31 of the cup 17 and by engaging the screw 37 through the hole 29 of the end piece and a screw is screwed. nut at the protruding end 1, as shown in FIG. 5.
  • the screw 37 is then driven by its head 38 while maintaining the nut by means of a second key, which has the effect to tension the locking and pressure device to bring it into a position as shown in phantom in Figure 5.
  • the arms 33 and 34 are braced in the holes 30 and 31 by exerting their bosses 35 and 36 a pressure on the end piece 1, in the direction of arrow F, Figure 2.
  • the locking device not only has the effect of keeping hooked the end piece 1 and the bucket 17, but also to maintain a permanent tension tending to apply the bucket 17 against the end piece 1. Because of this tension and the ramps of the hooking projections, any play due to wear is automatically taken up, so that the fastener remains perfectly rigid. Note, particularly in Figure 3, that the fixing is carried out very close to the axes 3 and 6, so that the torques exerted on the axes 3 and 6 are reduced to the minimum.
  • the binding is particularly compact.
  • FIG. 6 shows, by way of example, the attachment of a hydraulic hammer 40.
  • This hammer is provided with a female part 41 identical to the female part of the bucket 17.
  • the hammer 40 is placed on a log 42 so as to be able to engage the bottom piece 1 with its male profiles from below. Once fully engaged, the terminal part 1 lifts the hammer and it is then possible to set up the locking device.
  • the locking device undergoes only relatively very small forces. They are lower the lower the slope of the attachment ramps.
  • the corner effect of the projections can be such that the fixing is practically ensured by these projections alone. In this case, to remove the tool, it is necessary to strike the end piece 1 using the clearance 27.
  • the locking of the tool on the end piece can be ensured by means other than those shown in FIGS. 4 and 5. Another embodiment of the locking means will be described, by way of example, by means of the figure 7.
  • the locking means shown in Figure 7 consist of a transverse bar 43 at least the ends of which have a wedge-shaped profile and are engaged in two V-shaped notches 44 and 45 formed in the parallel ribs 18 and 19 of the tool 17, in the occurrence a bucket.
  • the bar 43 has a hole for the passage of a prestressing tie rod articulated at a point 47 on the end piece 1 and onto which is screwed a nut 48 intended to maintain a certain pressure on the bar 43.
  • This bar presses against the two inclined ends 49 and 50 on both sides of the end piece 1.
  • the wedge effect maintains pressure in the direction of the arrow. This execution is particularly simple and robust.
  • the bar 43 could bear against the lateral projections 11 and 12 of the end piece.
  • the locking means consists of a pair of pawls slidably mounted in a transverse groove of the end piece 1 and coming to engage by an oblique flank in two housings provided in the parallel ribs 18 and 19 of the tool, a spring and / or a cylinder being provided between the pawls, on the one hand, to exert a permanent axial pressure on the pawls and, on the other hand, to disengage the pawls from their housings for the separation of the tool and the end piece.
  • the cylinder can be single acting or double acting.
  • the invention is of course not limited to the embodiments shown.
  • the number and the shape of the projections could be different.
  • the projections of one of the parts to be assembled may not have ramps and have, for example, a circular or semi-circular profile or more or less rounded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Agricultural Machines (AREA)
  • Shovels (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Earth Drilling (AREA)
  • Soil Working Implements (AREA)

Claims (6)

  1. Kupplung eines Arbeitsvorsatzes an den Arbeitsarm einer Erdbaumaschine, bei der der Arbeitsarm mit einem beweglich verbundenen Endteil (1) für den Empfang des Arbeitsvorsatzes (17) versehen ist, wobei das Endteil mit zwei Paaren von profilierten Ansätzen (11, 12) versehen ist, welche eine in Richtung des Hineinführens des Endteils in den Arbeitsvorsatz geneigte Rampe (13, 14, 15, 16) aufweisen, wobei die Ansätze des Endteils unter zwei denen entsprechenden auch mit Rampen (24, 25) versehenen Ansätze (20, 21, 22, 23) des Arbeitsvorsatzes eingreifen und die Rampen des Endteils sich beim Eingreifen des Endteils in den Arbeitsvorsatz auf die Rampen des Arbeitsvorsatzes stützen, wobei die Neigung der Rampen (24, 25) des Arbeitsvorsatzes relativ zum Arbeitsvorsatz identisch zur Neigung der Rampen des Endteils relativ zum Endteil ist, und die Kupplung mit einem Verriegelungselement (32, 33, 34; 43) für das Verriegeln des Endteils auf dem Arbeitsvorsatz versehen ist, dadurch gekennzeichnet, dass das Paar profilierter Ansätze (11, 12) des Endteils (1) auf zwei parallele seitliche Seiten des Endteils gebildet sind, dass die Ansatzpaare (20, 21, 22, 23) des Arbeitsvorsatzes auf die Seiten zweier paralleler Rippen (18, 19) gebildet sind, deren Abstand voneinander der Breite des Endteils entspricht, und dass die Kupplung ausserdem mit mechanischen Mitteln (37, 46, 48, 44, 45) für die Aufrechterhaltung einer Vorspannung auf dem Verriegelungselement versehen ist, wobei diese Vorspannung einen Druck in Richtung (F) des Hineinführens des Endteils in den Arbeitsvorsatz aufrecht erhält, und somit das Endteil gegen den Arbeitsvorsatz gedrückt hält.
  2. Kupplung nach Anspruch 1, dadurch gekennzeichnet, dass das Verriegelungselement aus einem zentralen Teil (32) mit zwei Armen (33, 34) besteht, deren Enden einzeln in Oeffnungen (30, 31) des Arbeitsvorsatzes eingreifen und sich andererseits mittels eines Zwischenbuckels in Form eines Nockens (35, 36) auf das genannte Endteil (1) stützen, und dass die mechanischen Vorspannungsmittel aus einer auf dem zentralen Teil montierten Zugstange (3,7) besteht, das in das Endteil eingreift, um auf dem zentralen Teil des Verriegelungselements einen Zug auszuüben.
  3. Kupplung nach Anspruch 1, dadurch gekennzeichnet, dass das genannte Verriegelungselement aus einem Querbalken (43) besteht, der wenigstens an seinen Enden ein keilförmiges Profil aufweist, das in zwei auf den genannten parallelen Rippen vorgesehenen Ausspannungen (44, 45) eingreift, so dass der genannte Balken sich auf das Endteil, bzw. die seitlichen Ansätze (11, 12) dieses Teils stützt, und dass die mechanischen Vorspannungsmittel aus einer auf dem Endteil befestigten Zugstange bestehen, die den genannten Balken in Richtung des Aussparungsgrundes zieht.
  4. Kupplung nach Anspruch 1, dadurch gekennzeichnet, dass das genannte Verriegelungselement aus einem Paar Sperriegel besteht, welche gleitend in einer Querrille des Endteils (1) montiert sind, und sich durch eine schräge Seite in zwei in den genannten parallelen Rippen (18, 19) vorgesehenen Oeffnungen eingreifen, wobei die Vorspannungsmittel zwischen den Sperriegeln vorgesehen sind, um einen stetigen axialen Druck auf die Sperriegel auszuüben.
  5. Kupplung nach Anspruch 4, dadurch gekennzeichnet, dass die Mittel für das Ausüben eines Druckes auf die Sperriegel aus einer zwischen den Sperriegeln in Druck arbeitenden Feder bestehen, wobei zusätzliche mechanische Mittel für das Zusammendrücken der Feder und die Befreiung der Sperriegel vorgesehen sind.
  6. Kupplung nach Anspruch 4, dadurch gekennzeichnet, dass die Mittel für das Ausüben eines Druckes auf die Sperriegel aus einem Druckzylinder mit doppeltem Effekt bestehen.
EP91810540A 1990-07-18 1991-07-09 Kupplung eines Arbeitsvorsatzes an den Arbeitsarm einer Erdbaumaschine Expired - Lifetime EP0467837B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/174,383 US5394630A (en) 1990-07-18 1993-12-27 Device for mounting a tool at the end of a construction-machine jib

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2388/90A CH683541A5 (fr) 1990-07-18 1990-07-18 Fixation d'un outil à l'extrémité d'un bras de machine de chantier.
CH2388/90 1990-07-18

Publications (2)

Publication Number Publication Date
EP0467837A1 EP0467837A1 (de) 1992-01-22
EP0467837B1 true EP0467837B1 (de) 1995-05-24

Family

ID=4232620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810540A Expired - Lifetime EP0467837B1 (de) 1990-07-18 1991-07-09 Kupplung eines Arbeitsvorsatzes an den Arbeitsarm einer Erdbaumaschine

Country Status (8)

Country Link
EP (1) EP0467837B1 (de)
JP (1) JPH0814115B2 (de)
AT (1) ATE123096T1 (de)
CH (1) CH683541A5 (de)
DE (1) DE69109950T2 (de)
DK (1) DK0467837T3 (de)
ES (1) ES2073150T3 (de)
GR (1) GR3017205T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH687774A5 (fr) * 1993-01-26 1997-02-14 Etienne Moinat Fixation d'un outil à l'extrémité d'un bras de machine de chantier.
US10458094B2 (en) * 2016-06-23 2019-10-29 Adam Weaver Versatile connector for excavator tools

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1408271A (fr) * 1964-06-30 1965-08-13 Venissieux Atel Perfectionnements aux articulations des outils de pelles hydrauliques sur les bras et bielles de manoeuvre
US3556323A (en) * 1968-12-23 1971-01-19 Damian M Heimmermann Quick-connect coupler for bucket on excavating machine
FR2475160A1 (fr) * 1980-01-31 1981-08-07 Pingon Pierre De Dispositif formant prise d'outils automatique pour excavateur, chargeur, machine de terrassement ou autres
SE458939B (sv) * 1984-04-24 1989-05-22 Bengt Karlsson Snabbfaeste foer arbetsredskap
US4545720A (en) * 1984-05-17 1985-10-08 J. I. Case Company Quick coupler assembly
JPS6443090A (en) * 1987-08-07 1989-02-15 Copal Electronics Pwm control of miniature brushless dc motor
DE9000721U1 (de) * 1990-01-24 1990-03-01 Nagler, Jürgen, 5804 Herdecke Schnellkupplung eines Arbeitsvorsatzes an Baggern

Also Published As

Publication number Publication date
DE69109950T2 (de) 1996-01-11
JPH0814115B2 (ja) 1996-02-14
GR3017205T3 (en) 1995-11-30
JPH06167032A (ja) 1994-06-14
EP0467837A1 (de) 1992-01-22
DE69109950D1 (de) 1995-06-29
DK0467837T3 (da) 1995-10-02
CH683541A5 (fr) 1994-03-31
ES2073150T3 (es) 1995-08-01
ATE123096T1 (de) 1995-06-15

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