DE102009046213A1 - Alternate frame for demountable coupling of receptacle of tool in working vehicle, particularly front loader, has carrier, coupling element rigidly fastened to carrier and manual or automated locking mechanism with locking element - Google Patents

Abstract

The alternate frame (9) has a carrier (23), a coupling element (10) rigidly fastened to the carrier and a manual or automated locking mechanism with a locking element (13). The moving components of the locking mechanism are connected with each other or with the carrier by swiveling connections for the movement from a locked position in an unlocked position.

Description

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a removable frame for a replaceable coupling of a recording of a tool on a work vehicle, in particular a front loader. In particular, the removable frame is suitable for coupling with a tool, which via a receptacle according to ISO 24410 features. Furthermore, the invention relates to a front loader with such a removable frame.

STATE OF THE ART

Work vehicles are equipped with removable frames, via which different tools can be coupled via their recordings as needed to the work vehicle. For example, such a removable frame is coupled to the support arms and / or working cylinders of a front loader, so that with a working movement of the actuating cylinder of the front loader the removable frame - and thus over the recording rigidly coupled tool - can be raised and / or tilted.

DE 39 24 313 C2 discloses a removable frame with an upper, U-shaped, upwardly open coupling recess in which a cross-bolt of a tool designed as a blade can be hung. The blade has two lower coupling recesses which are formed as bores which are oriented parallel to the transverse bolt. In this coupling recesses each formed as a locking bolt locking elements can occur. In the locked position of the locking bolt, the blade is held with the first connection in the form of the transverse pin in the upper coupling recess and the second connection in the form of the locking pin in the lower coupling recesses on the removable frame. The actuation of the locking bolt via an actuating mechanism, which is formed with a pivot lever which is coupled directly via a hinge connection with a first locking bolt and is coupled via a coupling rod and a pivot lever with the second locking bolt. All of the mentioned, for the bringing about the locked position moving components are in this case movable in a plane which is oriented in the direction of a transverse axis of the working vehicle.

Also for the out DE 43 27 942 C1 known embodiment, a blade via a transverse bolt in an upper, U-shaped and upwardly open coupling recess are hooked to form the first connection, while a second connection between the tool and removable frame is produced by locking bolts of the removable frame, which enter into corresponding recesses of the tool , However, for this embodiment, the two locking bolts are integrally formed in the form of a complex shaped locking bar, which performs a translational movement for the transfer of the locking bolt from a locked position to an unlocked position, which is oriented in the direction of the transverse axis of the working vehicle. In a further embodiment of this solution idea suggests DE 103 50 749 A1 to provide the locking bolts with stepped diameters.

Also the off EP 1 586 709 B1 such as EP 1 586 708 B1 known embodiments are based on a U-shaped upper coupling receptacle and locking bolts, which are oriented and moved transversely to the longitudinal axis of the working vehicle to enter into corresponding coupling recesses, in particular bores of the tool. While EP 1 586 709 B1 discloses the actuation of the locking bolt via a manually operable pivot lever beats EP 1 586 708 B1 the use of a pneumatic or hydraulic actuator cylinder for moving the locking bolt.

For the out US 4,986,722 known embodiment, the removable frame also has an upwardly open, U-shaped upper coupling recess and a lower coupling element in the form of a transverse pin. In this case, the tool has a lower coupling recess, which is U-shaped and is open at approximately horizontal orientation in the direction of the removable frame. After hanging the tool with a transverse bolt of the same on the upper coupling recess of the removable frame, the lower cross bolt can enter the lower, U-shaped coupling recess. To produce the second connection, the U-shaped lower coupling recess of the tool is closed by an approximately vertically oriented locking bolt closing the initially open lower coupling recess, so that the transverse bolt of the removable frame is enclosed on the one hand by the lower coupling recess and on the other hand by the locking bolt.

For one out US 4,436,477 known embodiment of a removable frame has this an upper, U-shaped, upwardly open coupling recess, in which the tool can be hung with a suitable cross bolt, and a lower, U-shaped and horizontally oriented and forwardly open coupling recess, in which can enter a lower cross bolt of the tool. The already from the publication US 4,986,722 Known closure of the open-edged, lower U-shaped recess is accomplished in this case by a locking element, which is not moved translationally, but is pivoted about a pivot axis. This locking element is rigidly connected to an actuating lever.

In the Standard ISO 24410 is a standardized recording of a tool defined, which should allow a quick assembly and disassembly of the tool to and from a removable frame. Such a recording 1 is also in 1 shown and has an upper, downwardly open coupling recess 2 , a lower, upwardly open coupling recess 3 and a counter-support surface 4 , How out 1 the coupling recesses are visible 2 . 3 each acute-angled formed with a reason 5 . 6 and a protruding edge 7 . 8th , where the recesses 2 . 3 behind the edges 7 . 8th Forming undercuts. In a rough approximation, the recording has 1 Thus, a C-shaped inner contour for the interaction with a removable frame, in which the base leg of the C is formed with the counter-support surface and the acute-angled Kopplungsausnehmungen 2 . 3 form the upper and lower end of the C

An assigned removable frame 9 according to 1 and 2 has been presented by the company Bobcat at the fair GALABAU in Nuremberg on 14.09.2006. The removable frame 9 has an upper coupling element 10 , which is also formed acute-angled with a corresponding cross-section to the upper coupling recess 2 , and an edge 11 , The tool can with the recording 1 on the upper coupling element 10 Be "suspended", wherein the upper coupling element 10 in the upper coupling recess 2 enters and the edge 11 to the plant to the reason 5 comes. To enable a pivoting of the tool relative to the removable frame 9 may be the angle of the coupling element 10 also from the angle of the upper coupling recess 2 differ. Around the upper coupling recess 2 or the edge 11 of the removable frame 9 then can the removable frame 9 clockwise relative to the recording 1 be pivoted until the removable frame 9 with its frontal, large support surface 12 for engagement with the counter-support surface 4 comes. A firm connection between recording 1 and removable frames 9 also for a pivoting movement in the opposite direction can be brought about by a locking element 13 in the above-described pivotal position in the lower coupling recess 3 enters and with a locking surface fourteen for engagement with a counter-locking surface 15 comes with which the lower coupling recess 3 is limited. Continue in 1 can be seen bearing eyes 16 . 17 over which the removable frame 9 can be coupled to the carrier or working cylinder of the working vehicle to bring about a movement of the removable frame 9 with attached thereto tool, for example, for a vertical and / or tilting movement.

According to 2 has the removable frame 9 via a manually operable locking mechanism for actuating the locking element 13 as part of an assembly and disassembly of the tool on the removable frame 9 , Here is the locking element 13 with a locking bolt 18 formed in the removable frame 9 translational in the vertical direction with a degree of freedom of movement 22 in a guide bush 19 is guided and whose down from the removable frame 9 in the locked position protruding end with the locking surface fourteen Is provided. A first approximation L-shaped operating lever 20 is pivotable in an end region about a pivot axis 21 transverse to the translational shift degree of freedom 22 , across the bottom 5 . 6 as well as the edge 7 . 8th as well as in the direction of the vehicle longitudinal axis of the working vehicle is oriented towards a carrier 23 of the removable frame 9 stored. The locking bolt 18 and the operating lever 20 are coupled via a coupling rod 24 and a spring element 25 , where coupling rod 24 and a spring element 25 in mechanical series connection between actuating lever 20 and locking bolts 18 are interposed. For the in 2 illustrated unlocked position, the one leg of the L-shaped actuating lever extends 20 about from the pivot axis 21 in 3 o'clock direction, with coupling rod 24 and spring element 25 in this case an acute angle to the translational degree of freedom 22 taking. Approximately in the 5 o'clock position of the said leg of the operating lever 20 Aligns the longitudinal axis 26 of coupling rod 24 and spring element 25 with the translational degree of freedom 22 , wherein the spring element 25 is biased with a compressive force. This position represents an unstable equilibrium position, since without external influence of the locking mechanism retains the position described, while due to the bias of the spring element 25 a slight disturbance of the unstable equilibrium position has the consequence that the locking mechanism moves away from the unstable equilibrium position, namely either back into the in 2 illustrated unlocked position or in the opposite direction in the below-described locked position of the locking mechanism 27 that with the locking bolt 18 , the coupling rod 24 , the spring element 25 and the operating lever 20 is formed. Will the operating lever 20 from the illustrated unstable equilibrium position further in 2 in the Clockwise pivoted to a 6 o'clock position of said leg, this leg comes to rest against a stop 28 , whereby a locked position is taken. In this locked position, the spring element presses 25 the operating lever 20 against the attack 28 , For small deflections of the operating lever 20 from the stop 28 away, for example as a result of vibrations, the locking mechanism returns 27 to the stop 28 automatically back, unless there is a deflection up to the explained unstable equilibrium position. However, it comes to forces on the locking surface during operation of the work vehicle fourteen with a force component in the direction of the degree of freedom 22 upward, this force component does not result in leaving the unlocked position in the direction of the unstable equilibrium position. Rather, this force component causes the operating lever 20 even stronger against the attack 28 is pressed.

Further prior art is out US 5,078,569 . GB 2 182 834 A and US 3,985,249 known.

OBJECT OF THE INVENTION

• – der Herstellungskosten,
• – des Montageaufwands und/oder
• – des Wartungsaufwands

verbesserten Verriegelungsmechanismus besitzt. Weiterhin liegt der Erfindung die Aufgabe zugrunde, einen verbesserten Frontlader mit einem derartigen Wechselrahmen vorzuschlagen.The present invention has for its object to propose a removable frame for a replaceable coupling of a tool on a work vehicle, a particular in terms

• - the production costs,
• - the installation work and / or
• - the maintenance effort

has improved locking mechanism. Furthermore, the invention has for its object to propose an improved front loader with such a removable frame.

SOLUTION

The object underlying the invention is achieved with a removable frame according to the features of claim 1. Further inventive embodiments of such a removable frame arise according to the dependent claims 2 to 12. Another solution of the invention, the underlying object is given by a front loader with the Features of the independent claim 13.

DESCRIPTION OF THE INVENTION

The present invention is based first of the recognition that in the locking mechanism according to the obviously pre-used product according to 1 and 2 a guide of the translationally moving locking bolt must be made in a guide sleeve, which requires a production of the locking bolt and the guide sleeve within relatively narrow tolerance limits. Furthermore, the maintenance of such a product is relatively high, since a regular lubrication of the translationally moving components must be done. In addition, the system is susceptible to dirt, since the u. U. harsh operating conditions of the work vehicle dirt particles can enter the guide surfaces between the locking pin and guide bush, so that the function can be impaired and / or increased wear occurs.

According to the invention the locking mechanism is formed with a plurality of relatively pivotable components. The locking mechanism has an unstable equilibrium position created with a spring element, wherein a locked position of the locking mechanism is given away from the unstable equilibrium position by a stop. According to the above-mentioned, prior art prior art, the unstable equilibrium position of the locking mechanism can be used to prevent an automatic opening of the locking mechanism, since the existing spring element holds the locking mechanism in its locked position by the spring element presses the locking mechanism against the stop. If, during operation of the work vehicle with the removable frame and the tool, forces acting on the locking element at least with a force component directed in the direction of the basic degree of freedom of the locking mechanism, these forces do not lead to the release of the locking mechanism. Rather, the forces cause the locking mechanism is pressed against the stop reinforced.

The realization that the linear guide used according to the prior art is problematic, the invention implements the fact that instead of the connection of moving for the movement of the locking position to the unlocked position components of the locking mechanism on said linear guide (exclusively) pivotal connections are used , via which the components are connected to each other and / or to the carrier. Such pivotal connections can be simplified and may require reduced maintenance, especially lubrication. For example, the moving components of the locking mechanism can be partially or exclusively connected to each other via articulated or pivotal connections or pin-and-hole connection in which a Pin, bolt or screw extends through holes, bushes and the like of the moving components.

In a further embodiment of the invention, a rigidly attached to the carrier coupling element for the unconnected second connection, so locking mechanism in the unlocked position, a pivot axis. About this pivot axis, the tool is pivotally suspended from the removable frame. With the entry of the coupling element in the associated coupling recess thus has the tool relative to the tool frame a remaining degree of pivoting freedom with a pivoting in two different pivot directions. A support in one of the two pivot directions (also "first pivot direction") via an end-side support surface of the removable frame. At this the tool is supported with a counter-supporting surface of the tool in said first pivoting direction. Thus, only one degree of freedom remains between tool and removable frame in the other pivoting direction (also "second pivoting direction"). This degree of freedom can be eliminated in the locked position of the locking element in that the locking element of the removable frame is supported in this second pivoting direction on the (lower) coupling recess of the tool, for which purpose the locking element enters the lower coupling recess. According to the invention can thus be a division of the transferred between removable frame and tool forces by a large number of forces and moments is borne by the positive connection between the coupling element and the upper coupling recess and the large contact surface of the support surface on the counter-support surface, while the locking element only forces and moments is exposed, which are directed to pivot the removable frame in the second pivoting direction away from the receptacle of the tool.

In a particular embodiment of the invention, the locking element is designed as a kind of locking or pivoting hook, which is pivotally supported on the carrier. Here, a pivoting of the locking hook is possible about a pivot axis which is oriented parallel to the pivot axis of the tool, which is predetermined for example by the edge of the coupling element. In this case, a hook element of the locking hook can enter into the lower coupling recess in the locked position. The hook element forms the locking surface.

• – einen Betätigungshebel, der um eine Schwenkachse verschwenkbar ist,
• – den Verriegelungshaken, der um eine weitere Schwenkachse verschwenkbar ist, sowie
• – ein Koppelelement, über welches der Betätigungshebel und der Verriegelungshaken miteinander gekoppelt sind.

In a further embodiment of the invention has the locking mechanism

• An actuating lever, which is pivotable about a pivot axis,
• - The locking hook, which is pivotable about a further pivot axis, as well as
• - A coupling element, via which the actuating lever and the locking hook are coupled together.

In a particular embodiment of the invention, the coupling element is designed as a coupling rod, which, for example, a kind of four-bar linkage or any articulated chain may be formed, which has or assigning a spring element an unstable equilibrium position or dead center.

In a preferred embodiment of this idea, the pivot axes about which the actuating lever and the locking hook are pivotable, parallel to the pivot axis of the tool and oriented parallel to each other. Such alignment of the pivot axes allows a particularly compact arrangement of the locking mechanism in the removable frame. Furthermore, such an orientation of the pivot axes u. U. also that components of two locking mechanisms of a removable frame are coupled together via an actuating shaft, so that two locking mechanisms can be operated manually or automatically simultaneously via a single operating lever.

While according to the aforementioned prior art, the components of the locking mechanism have relatively complex manufacturing processes and geometries caused, for example, the production of the locking bolt and the guide bush with a precisely cylindrical outer and inner contour in a narrow tolerance range for the diameter, the invention proposes in a further embodiment of the removable frame that some or all of the pivoted components of the locking mechanism, in particular the operating lever, the coupling rod and the locking hook, are plate-shaped. Thus, for example, a production of the components can be made of a plate or a sheet, whereby the production costs can be drastically reduced. Such plate-shaped components may have holes through which then pivot pin can pass to the pivotal connection of the components.

It is possible that a removable frame has at least two locking mechanisms, via which a connection between the carrier and the tool is made at different locations.

In principle, it is possible that for the removable frame according to the invention, an actuation of the actuating lever is effected by manual action of the user on the actuating lever. Quite possible, however, is that the locking mechanism via an actuator in an unlocked position can be transferred. Here, in this context, the use of a pneumatic or hydraulic actuating cylinder for automatically bringing about the transfer of the locking mechanism in the locked or unlocked position, see. for example. EP 1 586 709 B1 , possible.

Quite possible is also that an automated actuation of the locking mechanism takes place in the course of the approach (ie, controlled away) of the removable frame to the tool. For this purpose, the actuating lever may possibly come into contact with an actuating surface or actuating contour of the tool, which increasingly actuates the actuating lever as the distance of the removable frame from the tool decreases. It is also possible that the movement of the actuating lever is coupled to the operation of at least one working cylinder, so that automatically with a movement of the removable frame relative to other components of the working vehicle, the actuation of the locking mechanism can take place.

In a further embodiment, the removable frame according to the invention has a coupling mechanism, via which a relative movement of the removable frame relative to the working vehicle, which is caused for example by the working cylinder of the working vehicle, is convertible into a movement of the actuating lever. In this case, the coupling mechanism in constant operative connection with the work vehicle, for example, with a front loader swing, stand or come only in partial areas of relative movement to effect. Preferably, the coupling mechanism is configured such that the movement of the actuating lever is in the unlocked position in a position of the removable frame, in which the tool is held without the second connection to the removable frame. For example, this may be the case for a complete tilting of the tool, for which the tool is held in the region of the first connection to the removable frame and is supported on one side via a support surface and a counter-support surface between receiving and removable frame. The design of the coupling mechanism can be arbitrary, for example with rockers, with a joint drive and / or slot connections, by means of which it is ensured that only in a partial pivoting area a coupling of the movements takes place. In one embodiment of the invention, the coupling mechanism is formed with a slider.

For a further solution of the problem underlying the invention, a front loader is formed with a removable frame, as has been previously explained, as well as with a tool, which with a recording to ISO 24410 Is provided.

Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and of combinations of several features mentioned in the introduction to the description are merely exemplary and can come into effect alternatively or cumulatively, without the advantages having to be achieved by embodiments according to the invention. Further features are the drawings - in particular the illustrated geometries and the relative dimensions of several components to each other and their relative arrangement and operative connection - refer. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also be combined with features of different claims. Likewise, in the claims listed features for further embodiments of the invention can be omitted.

BRIEF DESCRIPTION OF THE FIGURES

In the following the invention will be further explained and described with reference to preferred embodiments shown in the figures.

1 shows in a side view of a recording of a tool ISO 24410 and a removable frame according to the prior art in disassembled state.

2 shows a removable frame according to the prior art in a spatial view.

3 shows a removable frame according to the invention in a three-dimensional representation.

4 shows the removable frame according to 3 in a schematic side view of a state inserted into the receptacle of the tool, wherein a locking mechanism is in an unlocked position.

5 shows the removable frame according to 3 in one with 4 corresponding view, however, wherein the locking mechanism is in a position in which a Locking surface of a pivot hook comes to rest against a counter-locking surface of the recording.

6 shows the removable frame according to 3 in a view accordingly 4 and 5, wherein, however, the locking mechanism is in a locked position after exceeding an unstable equilibrium position or dead center.

7 shows a removable frame with two locking mechanisms in a spatial view.

DESCRIPTION OF THE FIGURES

For components which in some aspects are comparable to corresponding components according to 1 and 2 , the same reference numerals are used below for the embodiment according to the invention.

The in 3 spatially illustrated removable frame 9 is with a carrier 23 formed with welded together sheets. In the upper end of the carrier forms 23 a rigid coupling element 10 out with an upper edge 11 which is oriented transversely to a vehicle longitudinal axis and a pivot axis 29 pretends. The carrier 23 is with a flat, plate-shaped area 30 trained, which in 3 approximately vertically oriented and in the mounted position of the receptacle 1 facing side, the support surface 12 formed. In the lower end area 30 is also a plate-shaped, angled area 31 from the carrier 23 formed, whose inclination angle in the side view opposite the area 30 preferably between 119 ° and 121 ° (see. ISO 24410 ) amounts to, so that the range 31 with an investment area formed from its underside 53 to the plant comes to a lower counter-investment area 32 the recording 1 , Between the plate-shaped areas 30 . 31 extends a support plate 33 which transverse to the pivot axis 29 , oriented in the vertical direction and in the direction of the longitudinal axis of the working vehicle. The support plate 33 initially serves to stiffen the wearer 23 and can be welded to it. The area 31 has an approximately rectangular, continuous recess 34 which for in the intake 1 Inserted removable frame in the lower coupling recess 3 empties.

On the support plate 33 is the operating lever 20 rotatable about a pivot axis 35 stored, wherein the pivot axis 35 parallel to the pivot axis 29 is oriented. How out 3 it can be seen that a corresponding pivot bearing be formed by a bolt or a screw 36 both through a bore of the actuating lever 20 as well as the support plate 33 extends what can be done with or without the interposition of a plain bearing bush.

In the one actuating surface 37 of the operating lever 20 , which may be formed, for example, with a plastic sheath, opposite end portion is on the operating lever 20 a coupling rod 24 pivotable about a pivot axis 38 hinged, in which case the pivotal connection with a bolt or a screw 39 may be formed, which (with or without plain bearing bush) by drilling the operating lever 20 and the coupling rod 24 extends. In the operating lever 20 opposite end portion are the spring element 25 as well as the coupling rod 24 with mechanical series connection of the same to a pivoting hook 40 hinged. The swivel hook 40 forms a locking element 13 , For the illustrated embodiment, the pivot hook 40 approximately L-shaped, wherein a first leg 41 in an end region pivotable about a pivot axis 42 parallel to the pivot axis 35 oriented, with the support plate 33 connected is. The other thigh 43 forms in the area of its pivot axis 42 facing bottom of the locking surface fourteen out. With a pivoting of the swivel hook 40 around the pivot axis 42 can the thigh 43 of the swing hook 40 from above into the recess 34 and through this into the lower coupling recess 3 the recording 1 Enter until the locking surface fourteen to the plant comes to the counter-locking surface 15 the recording 1 (see. 5 ). For the illustrated embodiment, a hinged connection of coupling rod 24 and spring element 25 on the swivel hook 40 in the transition area of the thigh 41 to the leg oriented transversely thereto 43 ,

For the illustrated embodiment, a bolt or a screw extends 44 through a hole in the swivel hook 40 in a direction of a longitudinal axis 45 the coupling rod 24 oriented slot 46 the coupling rod 24 , Depending on the movement of the screw 44 along the long hole 46 in the direction of the anchor point of the coupling rod 24 to the operating lever 20 there is an increasing action on the spring element 25 , For this purpose, the spring element is for the illustrated embodiment 25 formed as a spiral compression spring through which coaxially the coupling rod 24 extends and whose upper spring base rigid with an upper end portion of the coupling rod 24 is coupled. By contrast, the lower spring base of the spring element is supported 25 at a radially inside of the coupling rod 24 displaceable in the direction of the longitudinal axis 45 guided disc 47 off, over the spring element 25 to a facing contact track 54 the swivel hook 40 is pressed.

As in the in 5 shown position of the pivot hook already with its locking surface fourteen at the counter-locking surface 15 the recording 1 is applied, the pivot lever 40 for a further pivoting movement of the actuating lever 20 counterclockwise in 5 not be pivoted further. Thus, the bolt or screw slides 44 in the slot 46 with a shortening of the distance of the screw 44 from the pivot axis 38 , what with an increasing application of the spring element 25 accompanied. The topmost position of the screw 44 in the slot 46 and the maximum bias of the spring element 25 is reached when a dead center or unstable equilibrium position is reached, in which the connecting line of the bolts or screws 36 . 39 coaxial with the connecting line of the bolts or screws 39 . 44 is oriented.

With over this unstable equilibrium position beyond pivoting of the actuating lever 20 counterclockwise, the screw slides 44 again in the slot 46 back, with this movement by the increasingly relieved spring element 25 is supported. About a contour design of the contact track 54 can influence the preload of the spring element 25 depending on the relative pivotal position between coupling rod 24 and swivel hooks 40 be taken.

The 4 to 6 show successively the different steps in the assembly of the tool with the recording 1 on the removable frame 9 :
According to 4 will the recording 1 from above on the removable frame 9 suspended, wherein the coupling element 10 in the upper coupling recess 2 the recording 1 entry. The removable frame 9 becomes like that to the recording 1 of the tool approximates that of the carrier 23 with its frontal support surface 12 in approximately horizontal direction to the counter-support surface 4 is pressed. In addition, the plate-shaped area 31 with the investment area 32 for attachment to the counter-investment area 53 the recording 1 come. The coupling element 10 forms with the upper coupling recess 2 already a first connection 48 out. As a result of the first connection 48 and the plant of the support surface 12 at the counter-support surface 4 and / or the plant of the area 31 at the investment area 32 In this state, it would already be possible to lift the tool by lifting the removable frame. Also, a tilting of the removable frame in 4 clockwise would not cause the relative position between removable frames 9 and recording 1 changed significantly. In the in 4 shown position is the locking mechanism 27 in its unlocked position, in which the pivoting hook 40 outside the lower coupling recess 3 and outside the recess 34 located, namely in 4 above it. In 4 is the longitudinal axis 45 the coupling rod 24 approximately in the direction of the bisector between the two legs 41 . 43 oriented while the operating lever 20 and the longitudinal axis 45 form an angle of approximately 90 °.

• – der ersten Verbindung 48,
• – der zweiten Verbindung 48, 49 und
• – der Abstützung über den Anlagebereich 32 gegen den Gegen-Anlagebereich 53 und/oder die Abstützfläche 12 an der Gegen-Abstützfläche 4

starr an dem Wechselrahmen 9 gehalten.For the transfer of the locking mechanism 27 from the unlocked position according to 4 becomes the operating lever 20 around its pivot axis 35 pivoted counterclockwise. With this movement of the operating lever 20 goes a movement of the swivel hook 40 accompanied down, bringing the thigh 43 of the swing hook 40 through the recess 34 in the lower coupling recess 3 enters until the locking surface fourteen to the plant comes to the counter-locking surface 15 , Another pivoting of the operating lever 20 is only possible with additional loading of the spring element 25 , A maximum loading of the spring element 25 is reached in the unstable equilibrium position. With further pivoting of the actuating lever 20 beyond this unstable equilibrium position, the spring element 25 relaxed again. In the thus taken locked position according to 6 comes the locking mechanism 27 , for example with the operating lever 20 or the coupling rod 24 , on one side to rest against a stop, which further pivoting the locking mechanism 27 prevented from the unstable equilibrium position away. The swivel hook 40 forms with the lower coupling recess 3 , with the locking surface fourteen and the counter-locking surface 15 a second connection 49 out. In the locked position of the locking mechanism 27 is the second connection 49 reliably produced. The tool is with the recording 1 as a result

• - the first connection 48 .
• - the second connection 48 . 49 and
• - The support over the investment area 32 against the counter-investment area 53 and / or the support surface 12 at the counter-support surface 4

rigid on the removable frame 9 held.

7 shows in a spatial representation of a removable frame, which with two removable modules 50 . 51 is formed, which has a support element 52 , here a support tube, are rigidly connected. The two exchange modules 50 . 51 each have a locking mechanism 27 and the necessary further coupling and connecting elements for connecting the removable modules 50 . 51 with an associated recording 1 of the tool. The support element 52 is oriented here transversely to the longitudinal extent of the work vehicle. For the in 7 illustrated embodiment, an actuation of the two actuating lever 20 of the Media module 50 . 51 separately from each other by the user. As mentioned above, the two locking mechanisms 27 be coupled together, for example by the operating lever 20 the two exchange modules 50 . 51 coupled to each other via a coupling rod, which is coaxial with the pivot axes of the two actuating levers 20 is oriented.

For the embodiment according to 3 to 6 are the two pivoting end positions of the locking mechanism 27 each predetermined by a stop 55 . 56 , Here has the support plate 33 a recess 57 , in which the plate-shaped coupling rod 24 , which extends in the same plane as the support plate 33 , is movable. The attacks 55 . 56 be here from the recess 57 formed by the coupling rod 24 in the swivel end positions for engagement with the stops 55 . 56 , so to the support plate 33 comes. It is also possible that the attack 55 from the carrier 23 is trained.

For the operation of the locking mechanism 27 There are many possibilities. Possible is an automated, motion-controlled actuation of the locking mechanism. For example, it is possible that with the approach or pivoting of the removable frame 9 in the direction of the recording 1 automates the locking mechanism 27 "Snaps" or "locks", bringing the second connection 49 will be produced. Also possible is the operation of the locking mechanism 27 directly or indirectly via an actuator, which may be designed pneumatically or hydraulically. For such a configuration, the actuating lever 20 be hinged to the actuator or interact with a device which directly or indirectly via the actuator relative to the removable frame 9 is moved. As mentioned above, the manual operation of the operating lever is also 20 possible.

In particular, unlocking is done deliberately by the user for security reasons.

In a particular embodiment, a descent is to be avoided by the work vehicle for unlocking. For this embodiment, the user tilts the tool completely by pressing the cylinder, ie in 5 to an end position counterclockwise. In this position, the tool is also for dissolved second connection 49 as a result of the first connection 48 and the concern with the support surface 12 on the removable frame 9 held. In the mentioned tilting, the removable frame rotates 9 relative to a structural element of the work vehicle, in particular to a front loader rocker to the through the bearing eye 17 predetermined axis. All axes of the locking mechanism 27 run parallel to this axis. By way of example, a slider supporting on the front loader rocker, the relative pivotal movement can be converted as a result of tilting in a pivoting movement of the actuating lever 20 , The movements must be adjusted so that when fully tilted removable frame 9 the operating lever 20 to the locked position 6 is pivoted. Such a simple coupling of the movements with an over a working cylinder of the working vehicle caused unlocking of the locking mechanism 27 is only by the inventive design of the pivot axes of the locking mechanism 27 According to the present invention possible, while this is not possible according to the aforementioned prior art.

LIST OF REFERENCE NUMBERS

1

admission

2

upper coupling recess

3

lower coupling recess

4

Counter-supporting surface

5

reason

6

reason

7

edge

8th

edge

9

Caddies

10

coupling element

11

edge

12

supporting

13

locking element

14

locking surface

15

Counter-locking surface

16

bearing eye

17

bearing eye

18

locking bolt

19

guide bush

20

actuating lever

21

swivel axis

22

translatory degree of freedom

23

carrier

24

coupling rod

25

spring element

26

longitudinal axis

27

locking mechanism

28

attack

29

swivel axis

30

Area

31

Area

32

plant area

33

support plate

34

recess

35

swivel axis

36

screw

37

actuating surface

38

swivel axis

39

screw

40

swivel hook

41

leg

42

swivel axis

43

leg

44

screw

45

longitudinal axis

46

Long hole

47

disc

48

first connection

49

second connection

50

change module

51

change module

52

supporting member

53

Counter-abutment region

54

contact track

55

attack

56

attack

57

recess

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3924313 C2 [0003]
• DE 4327942 C1 [0004]
• DE 10350749 A1 [0004]
• EP 1586709 B1 [0005, 0005, 0024]
• EP 1586708 B1 [0005, 0005]
• US 4986722 [0006, 0007]
• US 4436477 [0007]
• US 5078569 [0011]
• GB 2182834A [0011]
• US 3985249 [0011]

Cited non-patent literature

• ISO 24410 [0001]
• Standard ISO 24410 [0008]
• ISO 24410 [0027]
• ISO 24410 [0030]
• ISO 24410 [0038]

Claims (13)

Removable frame ( 9 ) for a replaceable coupling of a recording ( 1 ) of a tool on a work vehicle, in particular a front loader, with a) a carrier ( 23 ) b) one rigidly on the carrier ( 23 ) fastened coupling element ( 10 ), which is used to form a first connection ( 48 ) between carriers ( 23 ) and recording ( 1 ) in a coupling recess ( 2 ) of the recording ( 1 ), b) a manually, automatically and / or actuatable by an actuator locking mechanism ( 27 ) with a locking element ( 13 ), which is used to form a second compound ( 49 ) between carriers ( 23 ) and recording ( 1 ) in a locked position in a coupling recess ( 3 ) of the recording ( 1 ), c) wherein with preparation of the first compound ( 48 ) and the second compound ( 49 ) the recording ( 1 ) on the carrier ( 23 ), d) the locking mechanism ( 27 ) relative to each other pivotable components ( 20 ; 24 ), e) the locking mechanism ( 27 ) one with a spring element ( 25 ) has generated unstable equilibrium position and f) the locked position of the locking mechanism ( 27 ) is predetermined by a stop, apart from the unstable equilibrium position, characterized in that g) the components moved for the movement from the locked position into an unlocked position ( 20 ; 24 ; 40 ) of the locking mechanism ( 27 ) exclusively via pivotal connections with each other and / or with the carrier ( 23 ) are connected. Removable frame ( 9 ) according to claim 1, characterized in that a) the coupling element ( 10 ) for unproduced second compound ( 49 ) a pivot axis ( 29 ) to which the recording ( 1 ) pivotable on the removable frame ( 9 ) is suspended, b) an end support surface ( 12 ), at which the receptacle ( 1 ) with a counter-support surface ( 4 ) in a first pivoting direction about the by the coupling element ( 10 ) predetermined pivot axis ( 29 ) on the removable frame ( 9 ) is supported, and c) in the locked position of the locking element ( 13 ) a support of the locking element ( 53 ) of the removable frame ( 9 ) exclusively in a second pivoting direction about the by the coupling element ( 10 ) predetermined pivot axis ( 29 ) at the recording ( 1 ) he follows. Removable frame ( 9 ) according to claim 1 or 2, characterized in that the locking element ( 13 ) as a pivoting hook ( 40 ) is formed around a parallel to the pivot axis ( 29 ) of the recording ( 1 ) oriented pivot axis ( 42 ) pivotable on the carrier ( 23 ) is supported. Removable frame ( 9 ) according to claim 3, characterized in that the locking mechanism ( 27 ) with a) one about a pivot axis ( 36 ) pivotable operating lever ( 20 b) that about another pivot axis ( 42 ) pivotable swivel hooks ( 40 ) as well as c) at least one the operating lever ( 20 ) and the pivoting hook ( 40 ) coupling element is formed with each other. Removable frame ( 9 ) according to claim 4, characterized in that the coupling element as a coupling rod ( 24 ) is trained. Removable frame ( 9 ) according to claim 4 or 5, characterized in that the pivot axis ( 36 ) about which the operating lever ( 20 ) is pivotable, and the pivot axis ( 42 ) to which of the pivoting hooks ( 40 ) is pivotable parallel to the pivot axis ( 29 ) of the recording ( 1 ) are oriented. Removable frame ( 9 ) according to at least one of the preceding claims, characterized in that components of the locking mechanism, in particular the actuating lever ( 20 ), the coupling rod ( 24 ) and the pivoting hooks ( 40 ), are plate-shaped. Removable frame ( 9 ) according to one of the preceding claims, characterized in that a connection between carriers ( 23 ) and recording ( 1 ) via at least two locking mechanisms ( 27 ) he follows. Removable frame ( 9 ) according to claim 8, characterized in that the movement of the at least two locking mechanisms ( 27 ) is coupled together. Removable frame ( 9 ) according to one of the preceding claims, characterized in that the locking mechanism ( 27 ) Is transferred via an actuator in an unlocked position. Removable frame ( 9 ) according to one of the preceding claims, characterized in that the locking mechanism ( 27 ) is automatically converted into a locked position. Removable frame ( 9 ) according to one of the preceding claims, characterized in that a coupling mechanism is provided, via which a relative movement of the removable frame ( 9 ) opposite the work vehicle is convertible into a movement of the operating lever ( 20 ). Front loader with a removable frame ( 9 ) according to one of the preceding claims and a tool with a receptacle ( 1 ) according to ISO 24410.

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