EP0392972A2 - Raccord pour un godet d'excavateur - Google Patents

Raccord pour un godet d'excavateur Download PDF

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Publication number
EP0392972A2
EP0392972A2 EP90810171A EP90810171A EP0392972A2 EP 0392972 A2 EP0392972 A2 EP 0392972A2 EP 90810171 A EP90810171 A EP 90810171A EP 90810171 A EP90810171 A EP 90810171A EP 0392972 A2 EP0392972 A2 EP 0392972A2
Authority
EP
European Patent Office
Prior art keywords
coupling
coupling part
threaded rod
wedges
excavator
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.)
Granted
Application number
EP90810171A
Other languages
German (de)
English (en)
Other versions
EP0392972A3 (fr
EP0392972B1 (fr
Inventor
Pietro Pallotta
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
Priority to AT90810171T priority Critical patent/ATE94930T1/de
Publication of EP0392972A2 publication Critical patent/EP0392972A2/fr
Publication of EP0392972A3 publication Critical patent/EP0392972A3/fr
Application granted granted Critical
Publication of EP0392972B1 publication Critical patent/EP0392972B1/fr
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
    • 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 coupling for excavator buckets, by means of which the boom of an excavator can be non-positively and releasably connected to an excavator bucket.
  • Various such couplings are already known. These consist essentially of two mating coupling parts, of which the lower one is fixed to the bucket and the upper one is fixed to the boom. The tight fit of these two coupling parts is intended to achieve a connection that is as torsion-free as possible in all directions with a low overall height of the coupling.
  • the overall height of the coupling which is understood to mean the distance between the boom and the Sagger spoon when coupled, should therefore be small.
  • the couplings have elements in order to non-positively but releasably connect the two coupling parts to be coupled.
  • a bolt is used which penetrates the two coupling parts in the coupled state and which can be secured in this position.
  • the coupling and uncoupling then requires manual work.
  • the two coupling parts to be coupled are one inside the other at the lower coupling part about a pipe section which acts as a pivot axis swiveling.
  • the upper coupling part has a correspondingly shaped concave surface which forms the inner wall of a hollow half cylinder.
  • the upper coupling part lies inside the box-shaped, lower coupling part.
  • the elements for the non-positive connection of the two coupling parts are then given in that the upper, also box-shaped coupling part has openings in its wall which serve to receive lugs which are formed on the inner wall of the lower coupling part.
  • the undersides of the lugs facing the bottom surface of the lower coupling part are then at a slight angle to the underside of the upper coupling part.
  • Movable wedges are then arranged in this upper coupling part, which can be moved under the lugs by means of screw threads, with which they non-positively connect the two coupling parts.
  • Couplings are also known in which the non-positive connection of the coupling parts takes place by means of pivotable claws, which in turn are then either pivoted and secured by hand or by means of hydraulic or electrical means, similar to those already described above.
  • the spoons would be changed more often and better adapted to the work to be done. This would make the dredging work more efficient. Because the change of the excavator bucket could also be done significantly faster, the excavators would also be better occupied in terms of time.
  • a coupling for coupling an excavator bucket to the boom of an excavator which consists of a lower, box-shaped coupling part, which is firmly attached to the excavator bucket, and an upper box-shaped coupling part, which can be inserted or swiveled into the lower one, whereby lugs are formed on the inside of the lower coupling part, which protrude in the coupled state of the two coupling parts through openings in the side walls of the upper coupling part inside and under each of which a wedge can be pushed, characterized in that a single threaded rod with two opposite threads through two wedges and the Ge winch rod can be driven by means of a hydrostat arranged in the interior of the upper coupling part.
  • FIG. 1 shows the coupling 1 in the uncoupled state, attached to a boom 2 and bucket 3 of an excavator.
  • the clutch 1 consists of two clutch parts.
  • the lower coupling part 4 is firmly attached to the excavator bucket 3, while the upper coupling part 5 is firmly connected to the boom 2.
  • this connection is articulated in that the coupling part 5 has two side walls 6 on its upper side, which are provided with holes for receiving bolts. Are in the attached state these side walls 6 slipped over the end of the boom, which here consists of two boom arms 7, 8.
  • Both cantilever arms 7, 8 have a transverse hole 9 at their end. The distance between the two mouth planes of each transverse hole 9 corresponds to the distance between the two side walls 6.
  • the coupling part 5 is box-shaped on its undersides, the inside of the box formed in this way serving to receive the elements for non-positive coupling with the lower coupling part 4.
  • the side walls 10 of this box have openings 11.
  • the lower coupling part 4 is also box-shaped. This coupling part 4 can be firmly connected to the excavator bucket 3 in such a way that it is firmly welded to it.
  • lugs 13 are formed, which protrude at right angles from these inner sides. These lugs 13 each have an underside 14, against the side wall 12 on which the lug 13 in question is formed, and there with also runs slightly obliquely downwards against the bottom surface inside the coupling part 5.
  • the two coupling parts 4 and 5 are pivoted together for engaging or coupling the excavator bucket 3.
  • the lower coupling part 4 has a pipe section 15 connecting it between its side walls 12.
  • the rear of the coupling part 5 has a concave surface 16 which represents the inner surface of a hollow cylinder and whose radius corresponds to the outer radius of the pipe section 15.
  • the excavator operator brings the upper coupling part 5 to lie on the boom with this concave surface 16 on the pipe section 15. For this maneuver, he can largely see both the surface 16 and the pipe section from the driver's cab.
  • it pivots the upper coupling part 5 into the lower coupling part 4. This is done by advancing the cantilever arm 8 relative to the cantilever arm 7.
  • the coupling is locked, for which purpose the means in the interior of the upper coupling part 5 are used, which cannot be seen in this figure.
  • This locking mechanism is shown in FIG. 2, in that the clutch is shown in a section from the front in the swiveled-in state of the two clutch parts 4 and 5. In the situation shown here has not yet been locked.
  • Inside the coupling part 5 two wedges 17 are now arranged, each made of a steel square partially wedge-shaped cross section.
  • the wedge surfaces 18 have the same slope as the undersides 14 of the lugs 13, that is to say run parallel to those. Both wedges 17 are traversed by a common threaded rod 19.
  • This threaded rod 19 is rotatably mounted in the side surfaces 10 of the upper coupling part 5.
  • ball bearings 21 can be provided.
  • the threads 22 and 23, which the threaded rod 19 has, are directed in opposite directions to one another. This means that a thread 22 is a right-hand thread and the thread 23 is a left-hand thread or vice versa.
  • the threaded rod 19 carries a ring gear 20, which serves to drive the threaded rod 19, so that it can be rotated as desired.
  • the wedges 17 shift exactly opposite. On the one hand, they can be pushed under the lugs 13 in this way, with which they press the upper coupling part 5 firmly against the lower 4.
  • the threaded rod 19 is driven via the toothed ring 20, which in turn is driven by a roller chain 24, as can be seen from FIG. 3, which shows the mechanism in a top view.
  • the pipe section 15 on the lower coupling part 4, against which the upper coupling part 5 with its concave surface 16 lies, is also recognizable.
  • the lugs 13 formed on the inside of the side surfaces 12 protrude through the openings 11 in the side walls 10 into the interior of the upper coupling part 5.
  • the threaded rod 19 with the two opposing threads 22, 23 is mounted in the side walls 10 of the upper coupling part 5.
  • Figure 4 shows the same as Figure 3, but seen in a section from the side.
  • the upper 5 and the lower coupling part 4, as well as the lugs 13 on the lower and the openings 11 on the upper coupling part 5, as well as the wedges 17 and their drive means, namely the threaded rod 19, the roller chain 24 and the hydrostatic unit 25, can again be seen Stop bar 26, along which the wedges 17 are guided, is visible.
  • the pipe section 15 on the lower coupling part 4 and the concave surface 16 on the upper coupling part 5, which abuts the pipe section 15, can be seen in this figure.
  • the pivoting of the upper coupling part 5 relative to the lower 4 therefore takes place about the axis of the pipe section 15.
  • both the side surfaces 12 of the lower coupling part 4 and the side surfaces 10 of the upper coupling part 5 can be slightly conical to one another. If the upper coupling part 5 is then inserted or pivoted into the lower coupling part, it is additionally clamped laterally in the lower coupling part 4.
  • the end wall opposite the pipe section 15 or the conical surface 16 of both the lower 4 and the upper coupling part 5 can also run slightly upward with increasing radius towards the inside. This also causes jamming in the direction perpendicular to the pipe section 15 when the upper coupling part 5 is pivoted into the lower 4.
  • the drive mechanism according to the invention brings significant advantages over the conventional ones.
  • the advantages of a hydraulic drive were combined with those of a mechanical one.
  • the known hydraulic locking mechanisms lacked effective self-locking. If the hydraulic cylinder-piston unit leaks, the lock can loosen and, in the worst case, the excavator can lose its bucket. This has been remedied by the fact that for a hydrostatic drive 25 is used in the drive, which in turn drives a threaded rod 19 which has a natural self-locking feature, so that even with the heaviest stress on the excavator spoon and corresponding vibrations and impacts on the clutch 1, the latter cannot be released.
  • hydrostat 25 no longer needs to be subjected to hydraulic pressure. In contrast to a cylinder-piston unit, it is not constantly under pressure, but only when the locking mechanism is actually actuated. A hydrostat can also be built very robustly, so that it is many times more reliable and durable compared to the alternative of an electric motor. In addition, many excavators already have additional hydraulic connections, from which the supply of hydrostat 25 with hydraulic pressure fluid can be ensured without major structural changes to the excavator itself.
  • the clutch 1 according to the invention can therefore be actuated in the simplest manner by the excavator operator from his cabin.
  • Their simple design which allows the two coupling parts 4, 5 to pivot into one another, enables excavator buckets to be coupled and uncoupled without manual manipulations on the coupling itself, so that it is no longer necessary for the excavator operator to get out of the vehicle or to call in auxiliary personnel. But that can be worth it Save full machine hours and also create an incentive to work increasingly with the optimal excavator bucket.
  • the coupling also works for other tools instead of excavator buckets, for example for demolition hammers and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Clamps And Clips (AREA)
  • Shovels (AREA)
EP90810171A 1989-04-12 1990-03-06 Raccord pour un godet d'excavateur Expired - Lifetime EP0392972B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90810171T ATE94930T1 (de) 1989-04-12 1990-03-06 Kupplung fuer baggerloeffel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1376/89 1989-04-12
CH1376/89A CH680007A5 (fr) 1989-04-12 1989-04-12

Publications (3)

Publication Number Publication Date
EP0392972A2 true EP0392972A2 (fr) 1990-10-17
EP0392972A3 EP0392972A3 (fr) 1991-07-03
EP0392972B1 EP0392972B1 (fr) 1993-09-22

Family

ID=4208979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810171A Expired - Lifetime EP0392972B1 (fr) 1989-04-12 1990-03-06 Raccord pour un godet d'excavateur

Country Status (4)

Country Link
EP (1) EP0392972B1 (fr)
AT (1) ATE94930T1 (fr)
CH (1) CH680007A5 (fr)
DE (1) DE59002794D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9315868U1 (de) * 1993-10-18 1995-02-16 Liebherr-Hydraulikbagger GmbH, 88457 Kirchdorf Kupplung
WO1997028314A1 (fr) * 1996-02-02 1997-08-07 Nagler Juergen Dispositif de changement d'outil pour pelles hydrauliques
EP1353011A1 (fr) * 2002-03-27 2003-10-15 Rädlinger Maschinen- und Anlagenbau GmbH Dispositif pour accoupler un outil avec un engin de chantier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB928103A (en) * 1961-04-18 1963-06-06 Priestman Brothers Improvements relating to trench excavators
EP0143074A1 (fr) * 1983-09-15 1985-05-29 Fredi Stury AG Excavatrice
GB2208220A (en) * 1987-07-20 1989-03-15 Fritiof Hulden Quick-coupling device, e.g. for excavator bucket

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB928103A (en) * 1961-04-18 1963-06-06 Priestman Brothers Improvements relating to trench excavators
EP0143074A1 (fr) * 1983-09-15 1985-05-29 Fredi Stury AG Excavatrice
GB2208220A (en) * 1987-07-20 1989-03-15 Fritiof Hulden Quick-coupling device, e.g. for excavator bucket

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9315868U1 (de) * 1993-10-18 1995-02-16 Liebherr-Hydraulikbagger GmbH, 88457 Kirchdorf Kupplung
WO1997028314A1 (fr) * 1996-02-02 1997-08-07 Nagler Juergen Dispositif de changement d'outil pour pelles hydrauliques
EP1353011A1 (fr) * 2002-03-27 2003-10-15 Rädlinger Maschinen- und Anlagenbau GmbH Dispositif pour accoupler un outil avec un engin de chantier

Also Published As

Publication number Publication date
EP0392972A3 (fr) 1991-07-03
ATE94930T1 (de) 1993-10-15
CH680007A5 (fr) 1992-05-29
EP0392972B1 (fr) 1993-09-22
DE59002794D1 (de) 1993-10-28

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