EP3591122B1 - Quick changer - Google Patents

Description

The invention relates to a quick changer according to the preamble of claim 1. The invention also relates to a quick changer system with such a quick changer and an associated adapter.

Such quick couplers are used for simple and convenient changing of different attachments on construction machines. With such a quick coupler, e.g. swivel spoons, grippers, scissors, compressors, magnets, hydraulic hammers or other attachments can be coupled or uncoupled from a driver's cab, e.g. to a boom of an excavator, in a few seconds and with a high level of safety.

From the US 6,379,075 B1 a generic quick coupler is known. This contains a carrier which has first receptacles on one side for holding a first coupling element provided on an attachment and on the other side second receptacles with a locking element movable between a release position and a locking position for releasably holding a second coupling element. The locking element is designed as a linearly movable hook slide that can be moved between an open and a closed position. A display rod is attached to the hook slide, which is drawn into a housing in the closed position of the hook slide and protrudes with respect to the housing in the open position of the hook slide. Although the position of the hook slide can be checked by means of such a display device, the display device cannot check whether the coupling element has engaged correctly on the hook slide.

Next is from the WO 2016/153360 A1 a visible display element for a quick hitch known. The display element is visible when a coupling element is locked by a locking element provided for this purpose, the locking element being in the locking position.

From the DE 10 2015 009 491 A1 is an actuation indicator for coupling devices and from the DE 20 2006 018 263 U1 a coupling device for attaching a work implement to a boom is known.

The object of the invention is to create a quick changer of the type mentioned at the beginning and a quick changer system with such a quick changer, which enable an improved control of a proper locking.

This object is achieved by a quick changer with the features of claim 1 and by a quick-change system with the features of claim 11. Appropriate refinements and advantageous developments of the invention are specified in the subclaims.

In the case of the quick changer, the mechanical display device has a device for displaying a lack of engagement of the second coupling element on the second receptacles. Correct locking is therefore only indicated when the second coupling element is also in its position provided for correct locking. For the monitoring and display of a proper locking, not only the position of the at least one locking element but also the position of the second coupling element is included. This can improve control and increase security.

The device for displaying the lack of engagement of the second coupling element on the second receptacles comprises a display element movable between a locking position and an unlocking position and a coupling gear for moving the display element into the locking position when the at least one locking element is moved into the coupling position and for moving the display element backwards in the unlocking position in the event of a movement of the at least one locking element beyond the coupling position.

In a first embodiment according to the invention, the coupling gear contains a control lever which can be pivoted about a joint on the carrier and which is connected to the display element via a joint rod and a linearly movable rod. The control lever points preferably a control cam and a recess. The linearly movable rod is expediently guided displaceably in a guide and is resiliently pretensioned.

The control lever can be rotatable by a cylinder for displacing the at least one locking element via an actuating device. In a low-friction embodiment, the actuating device can be a lever with a ball bearing.

In an embodiment that is particularly easy to recognize for the operator, the display element can be a flap which is pivotably arranged on a housing and which can be moved between a raised locking position and a lowered unlocking position via a linearly displaceable rod. The display element can, however, also be a bolt that can be moved between an extended and retracted position or another suitable display element.

In a further embodiment according to the invention, the coupling mechanism can contain a slide which can be displaced at right angles to the display element and is connected to it via a toothed drive, and an actuating element which is detachably connected to the slide. The slide can be detachably connected to the actuating element, for example via a pivotable control lever. The toothed drive can comprise a lever that can be rotated by a toothed wheel, an intermediate wheel meshing with the toothed wheel, and a toothed rack on the slide that meshes with the intermediate wheel.

The invention also relates to a quick change system with a quick changer described above and an adapter which can be coupled to the quick changer.

Figur 1

eine zum Teil geschnittene Seitenansicht eines Schnellwechselsystems mit einem Schnellwechsler und einem Adapter in einer Kupplungsstellung;

Figur 2

eine Perspektivansicht des Schnellwechslers von Figur 1 in einer Wechselstellung;

Figur 3

eine vergrößerte Detailansicht A von Figur 2;

Figur 4

eine vergrößerte Detailansicht B von Figur 3;

Figur 5

eine zum Teil geschnittene Seitenansicht des Schnellwechselsystems von Figur 1 in einer Wechselstellung;

Figur 6

den Schnellwechsler in der Wechselstellung von Figur 5;

Figur 7

eine zum Teil geschnittene Seitenansicht des Schnellwechselsystems von Figur 1 in einer Kupplungsstellung;

Figur 8

den Schnellwechsler in der Kupplungsstellung von Figur 7;

Figur 9

eine zum Teil geschnittene Seitenansicht des Schnellwechselsystems von Figur 1 in einer nicht verriegelten ersten Stellung;

Figur 10

den Schnellwechsler in der Stellung von Figur 9;

Figur 11

eine zum Teil geschnittene Seitenansicht des Schnellwechselsystems von Figur 1 in einer nicht verriegelten zweiten Stellung;

Figur 12

den Schnellwechsler in der Stellung von Figur 11;

Figur 13

ein zweites Ausführungsbeispiel eines Schnellwechselsystems in einer Kupplungsstellung;

Figur 14

eine Anzeigevorrichtung des Schnellwechselsystems von Figur 13 in der Kupplungsstellung;

Figur 15

das Schnellwechselsystem von Figur 13 in einer verriegelten Stellung;

Figur 16

die Anzeigevorrichtung des Schnellwechselsystems von Figur 13 in der verriegelten Stellung;

Figur 17

das Schnellwechselsystem von Figur 13 in einer nicht verriegelten Stellung und

Figur 18

die Anzeigevorrichtung des Schnellwechselsystems von Figur 13 in der nicht verriegelten Stellung.

Further special features and advantages of the invention emerge from the following description of a preferred exemplary embodiment with reference to the drawing. Show it:

Figure 1

a partially sectioned side view of a quick change system with a quick changer and an adapter in a coupling position;

Figure 2

a perspective view of the quick hitch of FIG Figure 1 in a change position;

Figure 3

an enlarged detail view A of Figure 2 ;

Figure 4

an enlarged detail view B of Figure 3 ;

Figure 5

a partially sectioned side view of the quick change system of Figure 1 in a change position;

Figure 6

the quick coupler in the change position from Figure 5 ;

Figure 7

a partially sectioned side view of the quick change system of Figure 1 in a clutch position;

Figure 8

the quick coupler in the clutch position of Figure 7 ;

Figure 9

a partially sectioned side view of the quick change system of Figure 1 in an unlocked first position;

Figure 10

the quick coupler in the position of Figure 9 ;

Figure 11

a partially sectioned side view of the quick change system of Figure 1 in an unlocked second position;

Figure 12

the quick coupler in the position of Figure 11 ;

Figure 13

a second embodiment of a quick change system in a clutch position;

Figure 14

a display device of the quick change system of Figure 13 in the clutch position;

Figure 15

the quick change system from Figure 13 in a locked position;

Figure 16

the display device of the quick-change system of Figure 13 in the locked position;

Figure 17

the quick change system from Figure 13 in an unlocked position and

Figure 18

the display device of the quick-change system of Figure 13 in the unlocked position.

In Figure 1 shows a quick-change system consisting of a quick-change system 1 and an associated adapter 2 for simple and convenient changing of different attachments on construction machines, in particular excavators. With such a quick coupler, swivel spoons, grippers, scissors, magnets, compressors, hydraulic hammers or other mechanical or hydraulic attachments can be easily and conveniently coupled or uncoupled from a driver's cab to a boom or other attachment of an excavator or other construction vehicle.

The adapter 2, which can be attached to an attachment, contains a base plate 3 and two mutually parallel side cheeks 4, between which a first bolt-shaped coupling element 5 and a second bolt-shaped coupling element 6 spaced a predetermined distance apart for releasable connection to the quick changer 1 are arranged. The two bolt-shaped coupling elements 5 and 6 can be inserted into corresponding bores in the side cheeks 4 and fixed there.

The also in Figure 2 Quick coupler 1 shown in a perspective contains a carrier 7 designed as a welded or cast part, the first receptacles 8 open to the front on one side for receiving and holding the first bolt-shaped coupling element 5 and on the other side downwardly open second receptacles 9 with an in Figure 1 has shown locking element 10 for receiving and holding the second bolt-shaped coupling element 6.

In the embodiment shown, the quick changer 1 contains two spaced apart receptacles 8 for the first coupling element 5 on one side of the carrier 7 and two receptacles 9 for the second coupling element 6 on the other side designed fork-shaped. The downwardly open second receptacles 9 have a curved lower contact surface 11 for the contact of the second bolt-shaped coupling element 6. The carrier 9 contains two on its upper side Side parts 12 parallel to one another, in which continuous openings 13 are provided for fastening bolts (not shown) for fastening the quick coupler 1 to a boom of an excavator or a connection part of another construction vehicle.

In the embodiment shown, the quick changer 1 also contains two locking elements 10 designed as locking bolts, which according to FIG Figure 1 guided displaceably in guide bores 14 of the carrier 7 and hydraulically between a cylinder 15, which is H-shaped in plan view, between a cylinder 15 in FIG Figure 5 Retracted release position shown for releasing or coupling an attachment and an in Figure 7 Locking position shown are displaceable. In the locked position of Figure 7 the downwardly open second receptacles 9 are closed on the underside by the locking elements 10 arranged in the guide bores 14, so that the locking elements 10 engage under the second bolt-shaped coupling element 6.

In order to couple an attachment with the aid of the quick coupler 1, the quick coupler 1, which is usually arranged on a boom of an excavator, is first moved in such a way that a first coupling element 5, for example arranged on an adapter or on the attachment, enters the claw-shaped or fork-shaped receptacles 8 is retracted on one side of the quick coupler 1. Then the quick changer 1 with the locking elements 10 still retracted is pivoted around the first bolt-shaped coupling element 5 so that the second coupling element 6 on the adapter or attachment comes to rest on the contact surfaces 11 of the downwardly open receptacles 9 on the other side of the quick changer 1. The locking elements 10, which are arranged displaceably in the guide bores 14 in the carrier 7 of the quick changer 1, can then be hydraulically extended so that the two locking elements 10 on the quick changer 1 engage under the second bolt-shaped coupling element 6 and the attachment is thus held on the quick changer 1.

A mechanical display device 16 for checking proper locking is also provided on the quick changer 1. How special from the Figures 3 and 4 As can be seen, the mechanical display device 16 has a device for signaling a lack of engagement of the second coupling element 6 on the second receptacles 9. The device for signaling a lack of engagement of the second coupling element 6 on the second receptacles 9 contains a between a locking position and a Unlocking position movable display element 17 and a coupling gear through which the display element 17 is initially moved into the locking position when the locking elements 10 move into the coupling position. However, if the locking elements 10 move beyond the coupling position due to an improperly engaging coupling element 5, the display element 17 is moved back into the unlocking position via the coupling gear. As a result, it can be signaled to the operator that, despite actuation of the locking elements 10, no proper locking has taken place.

In the exemplary embodiment shown, the display element 17 is a flap which is pivotably arranged on a housing 18 and which is pushed by a linearly displaceable rod 19 via a bolt 20 guided within the housing 18 between a Figure 1 shown raised locking position and one in Figure 5 shown lowered unlocking position is movable. At the in Figure 1 In the locking position shown, the bolt 20 protrudes from the housing 19 and lifts the flap-shaped display element 17. In the unlocked position, however, the bolt 20 is drawn into the housing 18 and the flap-shaped display element 17 is closed. As a result, it can be seen visually from the outside, and in particular also from a driver's cab, whether the quick coupler 1 is properly locked. The display of the locking and unlocking position can, however, also be done only by the bolt 20 without a flap.

How special Figure 3 As can be seen, the coupling gear designed for the connection between the cylinder 15 and the display element 17 contains a control lever 22 which is arranged on the carrier 7 so as to be pivotable about a joint 21 and which is connected to the linearly movable rod 19 via a joint rod 23. The control lever 22 pivotable about the joint 21 has a control cam 24 and a recess 25 on one arm. One end of the toggle rod 23 is articulated to the other arm of the control lever 22. The other end of the articulated rod 23 is connected in an articulated manner to the linearly movable rod 19 for moving the display element 17. The linearly movable rod 19 is guided displaceably via a guide 26 fastened to the cylinder 15 and is inserted into the in FIG Figure 3 unlocked position shown pressed. In the embodiment shown, the guide 26 is designed as a twice angled sheet metal part. By rotating the plate-shaped control lever 22, the rod 19 is moved linearly via the articulated rod 23. The rotation of the control lever 22 takes place through the movement of the two Locking elements 10 provided cylinder 15 via a lever 28 with a ball bearing 29 arranged thereon. The ball bearing 29 is designed to engage the control cam 24 and the recess 25 of the control lever 22.

In the following, the mode of operation of the display device 16 described above will be explained with reference to FIG Figures 5 to 12 explained.

At the in Figures 5 and 6 The change position shown are the two locking elements 10 in a retracted release position. In this position the ball bearing 29 is according to FIG Figure 6 at a distance from the control cam 24 of the control lever 22 and the control lever 22 is pressed by the spring-loaded rod 19 via the toggle rod 23 into the starting position shown. The rod 19 is in a retracted position, as a result of which the flap-shaped display element 17 is in a folded-down unlocking position. This signals to the operator that the quick changer 1 is in a change position. In the in Figure 5 The change position shown with retracted locking elements 10, the quick changer 1 can be lowered on the front side so that the second coupling element 6 comes to rest on the lower contact surface 11 of the receptacles 9.

When the second coupling element 6 according to Figure 7 comes into contact with the lower contact surface 11 of the receptacles 9, the two bolt-shaped locking elements 10, which at their front ends have a rounded portion 30 adapted to the outer contour of the coupling element 6 for contact with the outside of the bolt-shaped coupling element 6, can be achieved by the common cylinder 15 extended and into the in Figure 7 reach shown clutch position. In this coupling position, the coupling element 6 is engaged under by the two bolt-shaped locking elements 10 and the adapter 2 is securely locked on the quick coupler 1.

If the two locking elements 10, with the adapter 2 correctly coupled, are moved by the cylinder 15 from their retracted release position into the position shown in FIG Figure 7 Moved clutch position shown, the lever 28 attached to the cylinder 15 moves with the ball bearing 29 according to Figure 8 on the control cam 24 of the control lever 22, so that the control lever 22 is rotated about the joint 21 and the flap-shaped display element 17 via the joint lever 23 and the linearly movable rod 19 in the raised locking position is moved. In the locked position of Figure 8 if the bolt 20 protrudes from the housing 18 and the flap-shaped display element 17 is raised. This signals to the operator that the adapter 2 is properly coupled and locked on the quick coupler 1. The coupling gear is designed such that the ball bearing 29 in the in Figure 8 Locking position shown comes to rest on the outermost edge of the control cam 24 at the transition to the recess 25.

If the bolt-shaped locking elements 10 according to Figure 9 due to a lack of engagement of the coupling element 6 on the receptacles 9 via the in Figure 8 Move out the coupling position shown and extend further up to the stop of the cylinder 15 on an edge 31 of the carrier 7, the ball bearing 29 arrives according to Figure 10 beyond the outermost edge of the control cam 24 and engages in the recess 25 of the control lever 22, whereby the control lever 22 acted upon by the spring-loaded rod 19 via the toggle rod 23 returns to the starting position. The bolt 20 at the front end of the rod 19 is also drawn back into the housing 18 and the flap-shaped display element 17 is moved into the lowered unlocking position. This is a signal for the operator that the adapter 2 is not properly locked on the quick changer 1 despite the locking elements 10 being extended.

Also an in Figure 11 The position shown with improper engagement of the coupling element 6 is displayed. If an extension of the two locking elements 10 is blocked by the incorrectly engaging coupling element 6, the ball bearing 29 according to FIG Figure 12 at a distance from the control cam 24 of the control lever 22 and the control lever 22 is pressed by the spring-loaded rod 19 via the toggle rod 23 into the starting position shown. The bolt 20 at the front end of the rod 19 is in a position retracted into the housing 18 and the flap-shaped display element 17 is in the lowered unlocking position. This indicates to the operator that the quick coupler 1 is not correctly locked.

In the Figures 13 to 18 Another exemplary embodiment of a quick-change system with a quick-change system 1 and an associated adapter 2 is shown. In this embodiment, too, a mechanical display device 16 is provided on the quick changer 1 to monitor proper locking. The mechanical display device 16 used in this embodiment contains a bolt which is in the form of a bolt Display element 17, which is arranged displaceably within a housing 18 between a locking position and an unlocking position. In the in Figure 16 The locking position shown protrudes the bolt-shaped locking element 17 with respect to the housing 18, whereas the locking element 17 is in a Figures 14 and 18th unlocked position shown is drawn into the housing 18. When the locking elements 10 move into the release or coupling position, in this embodiment too, the display element 17 is initially moved into the locking position via a coupling gear. However, if the locking elements 10 move beyond the coupling position due to an improperly engaging coupling element 5, the display element 17 is also moved back into the unlocking position here via the coupling gear. As a result, it can be signaled to the operator that, despite actuation of the locking elements 10, no proper locking has taken place.

As from the Figures 14 and 16 As can be seen, the bolt-shaped display element 17, which is guided displaceably within the housing 18, can be moved by a lever 33 which is arranged within the housing 18 so as to be pivotable about an axis of rotation 32. For this purpose, the lever 33, which is pivotable about the axis of rotation 32, is connected with its lever arm 34 in an articulated manner to the bolt-shaped display element 17 via a transverse pin 35. The lever 33 is rotated via a gearwheel 36 which is firmly connected to it and which engages via an intermediate gear 37 with a toothed rack 38 on a slide 39 which is displaceable within the housing 18 at right angles to the display element 17. By shifting the carriage 39, the display element 17 is thus between the in Figure 14 retracted position shown and the in Figure 16 The extended position shown is displaceable. A spring arrangement (not shown here) acts on the slide 39 in such a way that the display element 17 is drawn into the housing 18 under the force of the spring arrangement,

A rod-shaped actuating element 40, which protrudes from the housing 18 and is arranged at right angles to the display element 17, is displaceably guided in the slide 39. A two-armed control lever 42 which can be pivoted about an axis 41 is also arranged on the slide 39. The slide 39 is releasably connected to the rod-shaped actuating element 40 via the control lever 42, which is rotatable about the axis 41. For this purpose, the control lever 42 has on its one lever arm a nose 43 for engaging in a groove 44 of the actuating element 40 and at its other end a control slope 45 for engaging an inclined control surface 46 on the housing 18. The control lever 42 is acted upon by a spring (not shown here) in such a way that the nose 43 is pressed in the direction of the actuating rod 40. The actuating rod 40 is connected to the cylinder 15 via a linkage 47 and a bracket 48.

In the case of the Figures 13 to 18 The embodiment shown, the display device 16 functions as follows:
In the in the Figures 13 and 14 The cylinder 15 takes the change position shown in FIG Figure 13 position shown and the locking elements 10 are in a retracted release position. The rod-shaped actuating element 40, which is connected to the cylinder 15 via a linkage 47 and a holder 48, and the slide 39 coupled to this via the control lever 42 are located in a Figure 14 starting position shown. In this starting position of the slide 39, the display element 17 connected to the slide 39 via the rack 38, the intermediate gear 37, the gear 36 and the lever 33 is drawn into the housing 18. This signals to the operator that the quick changer 1 is in a change position. In this changing position, the rear end of the quick changer 1 can be coupled to the first coupling element 5 of the adapter 2 via the first receptacles 8 and then lowered on the front side so that the second coupling element 6 rests on the lower contact surface 11 of the receptacles 9 got.

Then the cylinder 15 according to Figure 15 is displaced in the direction of the second coupling element 6 and the locking elements 10 moved thereby couple properly into the adapter 2, the slide 39 is moved out of the position in FIG Figure 14 position shown in an in Figure 16 Locking position shown moved. In the in Figure 16 The shown locking position of the carriage 39 is the control lever 42 in its not yet pivoted coupling position. By shifting the slide into the locking position, the display element 17 is moved via the rack 38, the intermediate wheel 37, the toothed wheel 36 and the lever 33 into a locking position protruding relative to the housing 18. This signals to the operator that the adapter 2 is properly coupled and locked on the quick coupler 1.

If the bolt-shaped locking elements 10 according to Figure 9 due to a lack of engagement of the coupling element 6 on the receptacles 9 via the in Figure 8 If the clutch position shown is moved out and the cylinder 15 stops at an edge 31 of the carrier 7, the slide 39 is also moved further in the direction of the inclined control surface 46 on the housing 18. The control lever 42 is pivoted via the control slope 45 in such a way that the lug 43 disengages from the groove 44 on the actuating element 40 and there is no longer any latching between the slide 39 and the actuating element 40. The slide 39, which is resiliently pretensioned in the direction of the starting position, is then pressed into its starting position via the spring arrangement, the display element 17 being retracted into the housing 18 again. This is a signal for the operator that the adapter 2 is not properly locked on the quick changer 1 despite the locking elements 10 being extended. If the quick changer 1 is opened, the cylinder 15 moves back again and the latching between the resiliently pretensioned control lever 32 and the actuating element 40 is activated again to connect the slide 39 and the actuating element 40. The mechanism is then ready again for the next actuation of the quick coupler.

List of reference symbols

1

Quick coupler

2

adapter

3

Base plate

4th

Sidewall

5

First coupling element

6th

Second coupling element

7th

carrier

8th

First shot

9

Second shot

10

Locking element

11th

Contact surface

12th

Side part

13th

opening

14th

Pilot hole

15th

cylinder

16

Display device

17th

Display element

18th

casing

19th

pole

20th

bolt

21

joint

22nd

Control lever

23

Articulated rod

24

Control cam

25th

deepening

26th

guide

27

Rifle

28

lever

29

ball-bearing

30th

Rounding

31

Edge

32

Axis of rotation

33

lever

34

Lever arm

35

Cross pin

36

gear

37

Intermediate gear

38

Rack

39

sleds

40

Actuator

41

axis

42

Control lever

43

nose

44

Groove

45

Tax slope

46

Control surface

47

Linkage

48

bracket

Claims (11)

1. Quick changer (1) for changing an attachment on a building machine, which has a support (7), first receivers (8) arranged on one side of the support (7) for receiving a first coupling element (5), second receivers (9) arranged on the other side of the support (7) and having at least one locking element (10) movable between a release position for coupling or uncoupling the attachment and a coupling position for holding the attachment on the quick changer (1) for receiving a second coupling element (6) and a mechanical display device (16) to monitor locking, wherein the mechanical display device comprises an arrangement (17, 19, 22, 23, 39, 40) to display lack of engagement of the second coupling element (6) to the second receivers (9) having a display element (17) movable between a locking position and an unlocking position and a coupling gear (19, 22, 23; 39, 40) to move the display element (17) into the locking position during a movement of the at least one locking element (10) into the coupling position and for rearward movement of the display element (17) into the unlocking position during a movement of the at least one locking element (10) going beyond the coupling position, characterised in that the coupling gear (19, 22, 23, 39, 40) comprises a control lever (22) pivotable about a hinge (21) on the support (7) and which is connected to the display element (17) via a hinge rod (23) and a linearly movable rod (19), or has a carriage (39) displaceable at right-angles to the display element (17) and connected to the latter via a toothed drive (36, 37, 38) and an actuating element (40) releasably connected to the carriage (39).
2. Quick changer (1) according to claim 1, characterised in that the control lever (22) has a control cam (24) and a recess (25).
3. Quick changer (1) according to claim 2, characterised in that the control cam (24) and the recess (25) are arranged on one arm of the control lever (22) and the hinge rod (23) on the other arm of the control lever (23).
4. Quick changer (1) according to one of claims 1 to 3, characterised in that the control lever (22) can be rotated by a cylinder (15) for displacement of the at least one locking element (10) via an actuating arrangement (28, 29).
5. Quick changer (1) according to claim 4, characterised in that the actuating arrangement (28, 29) is formed by a lever (28) with a ball bearing (29).
6. Quick changer (1) according to one of claims 1 to 5, characterised in that the linearly movable rod (19) is displaceably guided in a guide (26) and resiliently pretensioned.
7. Quick changer (1) according to one of claims 1 to 6, characterised in that the display element (17) is a gate arranged pivotably on a housing (18) and which is movable between a raised locking position and a lowered unlocking position via the linearly movable rod (19).
8. Quick changer according to claim 1, characterised in that the carriage (39) is connected releasably to the actuating element (40) via a pivotable control lever (42).
9. Quick changer according to claim 8, characterised in that the double-arm control lever (42) arranged rotatably about an axis (41) on the carriage (39) has on its one lever arm a projection (43) for engagement in a groove (44) of the actuating element (40) and on its other lever arm a control slope (45) for engagement with an inclined control surface (46) on a housing (18).
10. Quick changer according to one of claims 1, 8 or 9, characterised in that the toothed drive (36, 37, 38) has a lever (33) rotatable by a toothed wheel (36), an idler wheel (37) meshing with the toothed wheel (36) and a toothed rack (38) meshing with the idler wheel (37) on the carriage (39).
11. Quick-change system having a quick changer (1) and an adapter (2) which can be coupled to the quick changer (1), characterised in that the quick changer (1) is configured according to one of claims 1 to 10.

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