Adapter for quick change system and quick change system comprising such an adapter

Abstract

The invention relates to an adapter (1) for a quick-change system for changing attachments on a construction machine, comprising two parallel, bolt-shaped coupling elements (5, 6) arranged between parallel sidecars (4) at a predetermined distance from each other for connecting the adapter (1) to a quick coupler (2), and a coupling element carrier (16) detachably attached to one of the coupling elements (6) for holding coupling elements. To facilitate simplified attachment, the coupling element carrier (16) is directly connected to the bolt-shaped coupling element (6) via a detachable positive-locking connection (26, 27) to prevent rotation.

Description

[0001] The invention relates to an adapter for a quick-change system according to the preamble of claim 1. The invention also relates to a quick-change system with such an adapter.

[0002] Such quick-change systems are used for the simple and convenient changing of different attachments on construction machinery. With such quick-change systems, for example, tilting buckets, grapples, shears, compactors, magnets, hydraulic hammers or other attachments can be coupled and uncoupled from a driver's cab, for example to an excavator boom, in just a few seconds and with a high level of safety. They usually contain an adapter on the attachment side and a quick coupler arranged on the construction machine, which has, for example, mouth-shaped first receptacles on one side for holding a first coupling element and, on the other side, second receptacles with at least one locking element that can be moved between a release position and a locking position for releasably holding a second coupling element.

[0003] An adapter for such a quick-change system is known from DE 20 2017 103 198 U1. It has a coupling element carrier for connecting the adapter to a quick-change system. A coupling element carrier is attached to one of the two bolt-shaped coupling elements to hold adapter-side coupling elements for a coupling with quick-change-side coupling elements. For this purpose, connecting webs with receiving holes for screws are welded to one of the two bolt-shaped coupling elements. A coupling element carrier holder, provided with openings for the coupling elements, can be screwed to these connecting webs via retaining webs welded to the holder. The connecting webs are attached to the bolt-shaped coupling element and the retaining webs are attached to the holder via welded joints, which involves considerable manufacturing effort.

[0004] The object of the invention is to provide an adapter and a quick-change system with such an adapter, which enable a simplified fastening of the coupling element carrier.

[0005] This object is achieved by an adapter having the features of claim 1 and by a quick-change system having the features of claim 12. Expedient embodiments and advantageous further developments of the invention are specified in the subclaims.

[0006] In the adapter according to the invention, the coupling element carrier is directly connected to the bolt-shaped coupling element via a detachable form-lock connection that is secured against rotation and can be detachably attached to the coupling element, for example, using screws or other fastening elements. This makes it possible to create a connection between the coupling element and the coupling element carrier that is secured against rotation and, if necessary, easily detachable, even without connecting elements that can be laboriously attached to the coupling element. In the event of any damage to the coupling element carrier, it can therefore be easily replaced without laborious alignment work. The screws can thus be used, for example, to create a force connection between the coupling element carrier and the coupling element, while the form-lock connection ensures exact alignment and a holding that is secured against rotation.Even if any changes or adjustments are made to the coupling element carrier, it can be easily removed and replaced with an appropriately modified coupling element carrier.

[0007] The positive connection between the coupling element carrier and the coupling element is formed by a positive-locking contour incorporated into the coupling element and a corresponding counter-contour on the coupling element carrier.

[0008] The positive-locking contour on the coupling element can expediently be formed by several groove-shaped recesses with different contact surfaces. The groove-shaped recesses can be machined into the outer surface of the coupling element with differently inclined contact surfaces.

[0009] The mating contour on the coupling element carrier, which matches the positive-locking contour on the coupling element, can be conveniently arranged on laterally projecting, fork-shaped retaining webs of the coupling element carrier. The retaining webs can be arranged on a strip-shaped holder provided with receptacles for coupling elements. The retaining webs can preferably be formed integrally with the strip-shaped holder. The mating contour can preferably be formed by differently inclined mating surfaces on the inside of a fork-shaped recess.

[0010] To ensure the secure and precise positioning of the coupling element, which is equipped with the coupling element carrier, on the side walls, the coupling element is conveniently secured to the side walls in a manner that prevents rotation. For this purpose, the connection between the coupling element and the side walls can be established, for example, via a form-fitting connection with a special contour on the coupling element and a matching counter-contour on at least one side wall.

[0011] In a further advantageous embodiment, the coupling element carrier can be non-positively secured to the bolt-shaped coupling element by means of screws. The screws can, for example, engage threaded holes on the coupling element carrier through transverse holes in the bolt-shaped coupling element.

[0012] The invention also relates to a quick-change system with an adapter as described above and a quick-change device that can be coupled to the adapter for easily changing an attachment on vehicles.

[0013] Further features and advantages of the invention will become apparent from the following description of a preferred embodiment with reference to the drawings. They show: Figure 1 a quick-change system with an adapter and a quick coupler in a separate position; Figure 2 the quick-change system from Figure 1 in a coupled position; Figure 3 an adapter with a coupling element carrier in an exploded view; Figure 4 the adapter from Figure 3 in assembled state; Figure 5 a cross-section through the adapter with a coupling element and the coupling element carrier in a not yet assembled state and Figure 6a cross-section through the adapter with a coupling element and the coupling element carrier in an assembled state.

[0014] In the Figures 1 and 2 is a quick-change system consisting of an adapter 1 and an associated quick-change device 2 for the easy changing of an attachment 3, which is only partially shown, on vehicles, in particular construction machinery, in a still separate position ( Figure 1 ) and a coupled position ( Figure 2 ). With such a quick-change system, tilt buckets, grapples, shears, magnets, compactors, hydraulic hammers, or other mechanical or hydraulic attachments can be easily and conveniently coupled to or detached from a boom or other attachment on a construction vehicle from the driver's cab.

[0015] The adapter 1 arranged on the attachment 3 contains two parallel, spaced-apart side walls 4, between which a first bolt-shaped coupling element 5 and a second bolt-shaped coupling element 6 arranged at a predetermined distance therefrom are held for releasable connection to the quick coupler 2. The two parallel bolt-shaped coupling elements 5 and 6 are inserted into corresponding openings 7 and 8 in the two side walls 4 of the adapter 1 and fixed there.

[0016] The quick coupler 2, which can be mounted on a boom of an excavator, for example, contains on one side forwardly open, fork-shaped or mouth-shaped first receptacles 9 for receiving and holding the first bolt-shaped coupling element 5 and on the other side downwardly open second receptacles 10 with a Figure 2shown movable locking element 11 for receiving and holding the second bolt-shaped coupling element 6. The downwardly open receptacles 10 have a curved contact surface 12 for the contact of the second bolt-shaped coupling element 6.

[0017] In the embodiment shown, the quick coupler 2 includes a support 13, which on one side contains two fork- or mouth-shaped receptacles 9 for the first coupling element 5 and on the other side two receptacles 10 for the second coupling element 6. On two parallel side parts 14 arranged on the upper side of the support 13, continuous receiving openings 15 are also provided for fastening bolts (not shown) for attaching the quick coupler 2 to a boom of an excavator or a connecting part of another construction vehicle.

[0018] In two parallel guides of the quick coupler 2, designed here as guide holes in the carrier 13, the locking elements 11, designed as locking bolts in the embodiment shown, are hydraulically moved between a Figure 1 shown retracted release position and one in Figure 2 slidably arranged in the extended locking position shown. In the extended locking position, the downwardly open second receptacles 10 are closed by the bolt-shaped locking elements 11 on the underside, so that the second bolt-shaped coupling element 6 is engaged from under by the locking element 11 and the adapter 1 can be held on the quick coupler 2.

[0019] In order to couple the adapter 1 to the quick coupler 2, the quick coupler 2, which is usually arranged on the boom of an excavator, is first moved in such a way that the first bolt-shaped coupling element 6 on the adapter 1 is retracted into the mouth-shaped receptacles 10 on one side of the quick coupler 2. Then, the quick coupler 2, with the locking elements 11 still retracted, is pivoted about the first bolt-shaped coupling element 5 in such a way that the second bolt-shaped coupling element 6 on the adapter 1 comes to rest against the contact surfaces 12 of the downwardly open receptacles 10 on the other side of the quick coupler 2. Subsequently, the bolt-shaped locking elements 11, which are slidably arranged in the carrier 13 of the quick coupler 2, can be Figure 2be extended hydraulically so that the second bolt-shaped coupling element 7 on the adapter 1 is engaged under by the two bolt-shaped locking elements 11 on the quick coupler 2 and the adapter 1 is thus held on the quick coupler 2.

[0020] As can be seen from the Figures 3 and 4As can be seen, a coupling element carrier 16 for holding adapter-side coupling elements for a coupling with quick-change coupling elements 2 is detachably attached to the second bolt-shaped coupling element 6 of the adapter 1. Via the adapter-side coupling elements (not shown) arranged on the coupling element carrier 16, energy connections provided on the adapter 1 for supplying energy to the attachment 3 can be automatically connected to corresponding energy supply lines on the quick-change coupling system 2 when the adapter 1 is coupled to the quick-change coupling system 2. This allows the attachment 3 to be supplied with, for example, hydraulic fluid, electrical energy, or another energy source.

[0021] The coupling element carrier 16 has a strip-shaped holder 18 provided with hole-shaped receptacles 17 for coupling elements, arranged parallel to the coupling element 6, and with retaining webs 19 and 20 arranged thereon for detachable connection to the bolt-shaped coupling element 6. In the embodiment shown, two fork-shaped outer retaining webs 19 and one fork-shaped inner retaining web 20 are arranged on the strip-shaped holder 18. The coupling element carrier 16 is non-positively fastened to the coupling element 6 by screws 21 via the fork-shaped retaining webs 19 and 20 that overlap the coupling element 6. The screws 21 engage through transverse bores 22 in the coupling element into threaded bores 23 of the retaining webs 19 and 20.To secure the bolt-shaped coupling element 6 against rotation relative to the side cheeks 4, the coupling element 6 has at least one end opposite flattened portions 24 for engagement with corresponding counter surfaces 25 at the corresponding opening 8 in the side cheek 4.

[0022] From the Figures 5 and 6 It can be seen that the bolt-shaped coupling element 6 contains on its outer side a machined form-fitting contour 26 for positive engagement with a corresponding counter-contour 27 on the fork-shaped retaining webs 19 and 20 of the coupling element carrier 16, which protrude relative to the holder 18. In the embodiment shown, the form-fitting contour 26 on the coupling element 6, which is designed as an outer contour with depressions, is formed by several Figure 3recognizable groove-shaped depressions 28, 29 and 30 are formed, which are machined at different angles into the outer side of the bolt-shaped coupling element 6 and form differently inclined contact surfaces 31, 32 and 33 for contact with corresponding counter surfaces 34, 35 and 36 of the coupling element carrier 16. The counter surfaces 34, 35 and 36 are provided on the inside of a fork-shaped recess 37 on the laterally projecting retaining webs 19 and 20 of the coupling element carrier 16. List of reference symbols

[0023] 1Adapter 2Quick coupler 3Attachment 4Side cheek 5First coupling element 6Second coupling element 7Opening 8Opening 9First receptacle 10Second receptacle 11Locking element 12Contact surface 13Carrier 14Side part 15Receptacle opening 16Coupling element carrier 17Receptacle 18Bracket 19Outer retaining web 20Inner retaining web 21Screw 22Cross hole 23Threaded hole 24Flattening 25Counter surface 26Form-locking contour 27Counter contour 28Recess 29Recess 30Recess 31Contact surface 32Contact surface 33Contact surface 34Counter surface 35Counter surface 36Counter surface 37Recess

Claims

1. Adapter (1) for a quick-change system for changing attachments on a construction machine which contains two bolt-like coupling elements (5, 6) parallel to one another arranged between parallel sides parts (4) at a predetermined distance from one another to connect the adapter (1) to a quick changer (2) and a coupling element support (16) attached releasably to one of the coupling elements (6) to hold coupling elements, characterised in that the coupling element support (16) is connected directly to the bolt-like coupling element (6) secured against rotation via a releasable positive connection (26, 27), the positive connection (26, 27) being formed by a positive contour (26) incorporated into the coupling element (6) and a corresponding counter-contour (27) on the coupling element support (16).

2. Adapter (1) according to claim 1, characterised in that the positive contour (26) on the coupling element (6) is formed by several groove-like depressions (28, 29, 30) with bearing surfaces (31, 32, 33).

3. Adapter (1) according to claim 2, characterised in that the groove-like depressions (28, 29, 30) with differently inclined bearing surfaces (31, 32, 33) are incorporated into the outer side of the coupling element (6).

4. Adapter (1) according to one of claims 1 to 3, characterised in that the counter-contour (27) is arranged on laterally projecting fork-like holding bars (19, 20) of the coupling element support (16).

5. Adapter (1) according to claim 4, characterised in that the holding bars (19, 20) are arranged on a strip-like mounting (18) provided with receivers (17) for coupling elements.

6. Adapter (1) according to claim 5, characterised in that the holding bars (19, 20) are configured integrally with the strip-like mounting (18).

7. Adapter (1) according to one of claims 1 to 6, characterised in that the counter-contour (27) is formed by differently inclined counter-surfaces (34, 35, 36) on the inner side of a fork-like recess (37).

8. Adapter (1) according to one of claims 1 to 7, characterised in that the coupling element (6) provided with the coupling element support (16) is attached to the side parts (4) secured against rotation.

9. Adapter (1) according to claim 8, characterised in that the coupling element (6) provided with the coupling element support (16) is connected to the side parts (4) via a positive connection (24, 25).

10. Adapter (1) according to one of claims 1 to 9, characterised in that the coupling element support (16) is attached non-positively to the bolt-like coupling element (6) by screws (21).

11. Adapter (1) according to claim 10, characterised in that the screws (21) engage through transverse bores (22) in the bolt-like coupling element (6) in threaded bores (23) on the coupling element support (16).

12. Quick-change system with an adapter (1) and a quick changer (2) which can be coupled to the adapter (1), characterised in that the adapter (1) is configured according to one of claims 1 to 11.

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