EP3607865A1 - Interface for a soil working implement with a base and an attachment - Google Patents

Abstract

The invention relates to an interface (1) for a soil tillage implement (2) with a base implement (3) and a front attachment (4) that can be connected to the base implement (3), the interface (1) being an outer interface part (5) and corresponding to the shape Interface outer part (5) formed interface inner part (6), the interface inner part (6) a suction channel (7) and a contact carrier (8) arranged outside the suction channel (7) with a plurality of electrical contacts (9, 10, 11, 12, 13 ) and wherein the interface outer part (5) has a plurality of corresponding electrical contacts. In order to allow only certain combinations of base unit (3) and attachment unit (4), it is proposed that the interface outer part (5) and the interface inner part (6) furthermore each have at least two shape coding element pairs (16, 17, 18, 19), one the first shape coding element pair (16) of the interface outer part (5) is designed to correspond in position and shape to a first shape coding element pair (17) of the interface inner part (6), and a second shape coding element pair (18) of the interface outer part (5) is position and shape corresponding to a second shape coding element pair (19) of the interface inner part (6), each pair of shape coding elements (16, 17, 18, 19) each having two shape coding elements (14, 15) of the same shape and formed separately from one another.

Description

Technical field

The invention relates to an interface for a soil cultivation device with a base device and a front device that can be connected to the base device, the interface having an interface outer part and an interface inner part designed to correspond to the interface outer part, the interface inner part having a suction channel and a contact carrier arranged outside the suction channel with a plurality of Has electrical contacts and the interface outer part has a plurality of corresponding electrical contacts.

Furthermore, the invention relates to a tillage implement with a base implement, a front attachment connectable to the base implement and an interface for connecting the front attachment to the base implement.

In addition, the invention also relates to a basic device of a soil cultivation device with an interface inner part, which is designed for connection to an interface outer part of a header device to be connected to the base device, and a header device for a soil cultivation device, the header device having an interface outer part, which for connection to an interface inner part of a base unit to be connected to the front unit.

State of the art

Soil cultivation devices with a basic device and an attachment device that can be connected to them are known in the prior art. The soil cultivation device can be, for example, a cleaning device, in particular a vacuum cleaner, act, the base unit of which has a power supply, a motor-blower unit and a dust chamber. The motor-blower unit is used to suck dust and dirt into the dust chamber. One or more attachments can be connected to the base unit.

The attachment can have, for example, a rotating bristle element, a wiping element, a polishing device or the like.

The interface of the soil tillage implement provides a suction channel connection, mechanical connection and electrical connection between the front attachment and the base unit. The interface has an interface outer part and an interface inner part, which can be plugged into one another in order to connect the attachment device to the base device.

The patent specification EP 0 666 051 B1 discloses, for example, a suction line connector for a vacuum cleaner, with a suction line section as a plug-in part, a counterpart as a plug receiving part of an attachment and electrical contacts, which are arranged outside a cross section of the suction line section and the counterpart. The plug-in part and the plug-in part of the suction line connector have cross-sections which correspond to one another, so that the corresponding plug parts can be connected to one another, the two plug parts being aligned with one another via a flattening associated with the electrical contacts.

Summary of the invention

On the basis of the aforementioned prior art, it may be desirable to exclude certain combinations of base unit and front unit, for example to prevent a low-voltage device from being connected to a high-voltage device.

It is therefore an object of the invention to further develop soil cultivation devices with a basic device and a front attachment or a basic device, a front attachment and an interface.

To solve this problem, an interface of the type described above is first proposed, in which the interface outer part and the interface inner part furthermore each have at least two shape coding element pairs, a first shape coding element pair of the interface outer part being designed in a position and shape corresponding to a first shape coding element pair of the interface inner part, and wherein a second shape coding element pair of the interface outer part is designed to correspond in position and shape to a second shape coding element pair of the interface inner part, each shape coding element pair each having two shape coding elements of identical shape and formed separately from one another.

According to the invention, the interface is now designed with a shape coding in order to specifically achieve or exclude plug compatibility of the interface outer part and the interface inner part. This enables or prevents certain basic device / front device combinations. The manufacturer can selectively code valid combinations via the interface or code non-valid combinations. In particular, different codes for different ones can also be used Device generations may be provided. As previously mentioned, the coding can, for example, prevent low-voltage systems from being compatible with high-voltage systems. Certain basic devices and attachments that are not coordinated with one another, for example, with regard to their working points, cannot therefore be combined. A combination of devices that are not coordinated with one another could otherwise lead to a malfunction and / or damage to one of the devices and is therefore excluded. The compatibility or incompatibility of the interface parts is prevented in detail by providing two pairs of shape coding elements on each of the interface parts, which, as shape coding elements, comprise, for example, defined projections and troughs in the respective interface part, which only correspond to correspondingly corresponding troughs or projections of the other interface part. The compatibility of the interface parts therefore not only requires that the shape of a suction channel end section and the contact carrier correspond to one another, but rather there must also be compatibility of the pairs of shape coding elements on both sides of the interface outer part and the interface inner part of the interface. The shape coding element pairs each have at least two shape coding elements, which are preferably of identical design with respect to their shape. The shape coding elements are furthermore particularly preferably arranged symmetrically with respect to an axis of symmetry of the interface, for example a longitudinal axis of the suction channel. The form coding element pairs primarily take on the function of form coding the interface, not other functions such as suction channel connection or electrical connection of the interface parts. These functions are primarily reserved for the suction channel or suction channel end section and the contact carrier.

Furthermore, it is proposed that the first shape coding element pairs be in relation to their shape and their position on the Distinguish the interface from the second form coding element pairs. Because the interface has two different types of shape coding element pairs, which differ in terms of their shape and their position at the interface, different combinations of a main device with several attachments can be permitted or excluded. If at least one of the shape coding element pairs of the basic device matches a shape coding element pair of the front device and the respective second shape coding element pair does not prevent a connection, the respective base device and the front device can be connected to one another. In particular, this is advantageous for establishing compatibility or non-compatibility between different generations of devices. This will be explained in more detail later with reference to the description of the figures.

Furthermore, it is proposed that a suction channel end section of the suction channel of the interface inner part be inserted into the interface outer part when the interface is connected, the axial overlap of the interface inner part and the interface outer part being at least 20 mm, preferably at least 25 mm. The interface inner part is inserted with the defined axial overlap into the interface outer part, the suction channel end section of the suction channel of the interface inner part serving as a stiffening tube and, alternatively, required complex interface parts, which have to be butted against one another, can be omitted. The pushing together of the interface inner part and the outer interface part further enables a rough alignment of the two interface parts to each other, whereby the alignment of the electrical contacts on both sides is facilitated. In practice, an axial overlap of the interface parts of at least 20 mm has proven useful, in particular in the case of suction channels which have an elliptical suction channel end section with a diameter ratio of D _max / D _min of approximately 20 mm to 14 mm.

Furthermore, it is proposed that the contact carrier have more than three electrical contacts. The contact carrier preferably has three electrical contacts for a power supply of the front attachment through the base unit and at least one additional electrical contact for signal transmission between the base unit and the front attachment. The contact carrier and its electrical contacts are separated from the suction path of the suction channel. This results in a high level of electrical coupling security on the one hand, and optimal flow guidance within the suction channel on the other. In addition to the three electrical contacts for the power supply of the front attachment, the interface or the contact carrier has at least one further electrical contact. This can initially be designed as a reserve contact for an expandable electrical contacting of the interface, and / or preferably enable signal transmission between the base unit and the front unit. The electrical contacts can be provided one behind the other in the circumferential direction of the interface inner part. As a result, the contact carrier can be designed such that it has the shape of a ring section which at least partially surrounds the suction channel. This results in a greater approximation of the interface overall to a circular shape, so that ergonomic haptics are maintained for a user of the tillage device. The electrical contacts can be arranged as a plug-in part or receiving part on the interface inner part and the interface outer part, or vice versa.

Furthermore, it is proposed that the electrical contacts are arranged such that they can be displaced on the interface inner part and / or the interface outer part, with a movement play of a pair of electrical contacts consisting of corresponding electrical contacts of the interface inner part and the interface outer part being in particular at least 1 mm. According to this embodiment, the electrical contacts are preferably floating on the contact carrier or the interface inner part or the interface outer part suspended. In contrast to a rigid suspension of the electrical contacts, contact damage can thus be avoided, which can occur due to a vibration of the interface with a constant wobble of, for example, approximately 1 mm. The proposed floating, ie displaceable, suspension of the electrical contacts keeps the movement of the interface away from the contact points of the electrical contacts.

It can further be provided that the contact carrier is arranged axially set back relative to a suction channel end section of the suction channel. According to this embodiment, the electrical contacts of the interface inner part or the interface outer part are removed from a suction channel end section of the suction channel, so that when the interface is joined, the profile in the area of the suction channel end sections initially interlocks and the electrical contacts are still kept free of coupling-related forces.

In order to be able to use a suction channel end section of the interface inner part on its own as a suction nozzle, d. H. Without connecting an outer interface part, it is proposed that an end face of the suction channel end section has an acute angle to a longitudinal axis of the suction channel end section. In other words: the suction channel end section of the suction channel is cut obliquely and can have an angle of, for example, 30 °. This also allows corner areas of an environment to be cleaned to be optimally cleaned.

Furthermore, it can be provided that, starting from a suction channel end section, the interface inner part has a cross-sectional area that gradually increases in the axial direction of the suction channel, in particular individual circumferential tracks of a peripheral surface of the interface inner part compared to adjacent partial surface areas of the peripheral surface protrude radially outward, the peripheral tracks of the interface inner part abutting corresponding radial projections of the interface outer part protruding radially inward when the interface is closed and thereby spacing adjacent partial surface areas from one another. According to the first-mentioned embodiment, the interface section to be inserted into a receptacle of the counterpart increases in a step-like manner starting from a suction channel end section. This results in an advantageous and easily overcome pre-centering of the interface parts to be coupled, the angular alignment of the outer interface part and the inner interface part only occurring when a first step is passed. The user feels a full, well-sealed guide right into an end position that characterizes a closed interface. The contact carrier is preferably assigned to a larger step of the interface inner part. In particular, according to the further proposed embodiment, special peripheral tracks are provided on the peripheral surface of the interface inner part, which define a step fit system. The actual contact between the interface inner part and the interface outer part then takes place with the interface closed, essentially via the defined circumferential paths, which form fitting rings of the system. In addition to the stepped course of the interface outer part and the interface inner part, the interface thus has a fitting profile between the interface parts.

It can be provided that a suction channel end section of the suction channel of the interface inner part has an abrasion-resistant soft material. The interface inner part is therefore preferably equipped with an advantageous direct suction option, so that the interface inner part can be brought up directly to the surface without damaging the interface inner part or a surface to be cleaned. The suction channel end section of the suction channel of the interface inner part preferably has a wear zone made of an abrasion-resistant soft material which has material properties such as having optimal abrasion resistance, prevention of staining and mechanical strength. For example, the abrasion-resistant soft material can be a synthetic rubber material. The soft material is preferably arranged detachably on the suction channel. The user can thus remove the abrasion-resistant soft material as desired from the suction channel end section, for example if he wants to close the interface. Alternatively, the interface can also be closed when soft material is present.

It can be provided that the interface inner part, in particular the contact carrier, has an actuating element which can be latched into a shape-corresponding opening of the interface outer part, the actuating element having a latching element which can be latched into a recess in the interface outer part. Furthermore, the latching element and / or a border of the recess can have an inclined contact surface in the joining direction and / or opposite to the joining direction for the sliding overcoming of the border by the latching element. The actuating element creates a latching connection between the interface parts of the interface, the inner interface part and the outer interface part being coupled to one another. For example, the actuating element can be designed in such a way that the latching element is moved away from a corresponding latching element of the outer interface part in the event of bending stress or displacement of the actuating element, so that the latching connection can be released. The bending stress, or for example also a pivoting, of the actuating element can preferably result in a contact surface of the latching element being able to overcome the border of the recess. The inclined contact surface of the latching element and / or the border of the recess, which is proposed in particular, ensures that the latching can also be carried out and / or released when the actuating element is not actuated. In particular, this can achieved that the interface outer part can be removed from the interface inner part without actuating the actuating element.

It is also proposed that an outwardly facing peripheral surface of the interface inner part has a circumferential groove in which a shape-corresponding sealing element is arranged. The shape-corresponding sealing element ensures that the interface is sealed, regardless of the quality of the fit between the outer interface part and the inner interface part. The sealing element is preferably made of an elastic material, so that a play between the interface parts can be compensated. The groove provided for the sealing element is preferably aligned with a step of the previously proposed step profile of the cross-sectional area of the interface inner part, so that the sealing element acts immediately at the beginning of the interface coupling.

According to a further embodiment, it can be provided that an outwardly facing peripheral surface of the interface inner part has lamellae oriented in the circumferential direction for non-positive contact with an inwardly facing peripheral surface of the interface outer part. According to this embodiment, the interface inner part can alternatively or in addition to the use of an actuating element by means of the lamellae be frictionally connected to the interface outer part. The lamellae are preferably essentially transverse to the longitudinal extent of the suction channel. For example, a suction channel end section of the interface inner part can also be surrounded by a lamella in a helical shape. By using the outer interface part as a plug-in zone, space-minimized interface inner parts can thus be used. The lamellae are preferably made of a hard elastic material, so that on the one hand they provide the required adhesion to the inner surface of the interface outer part can provide, and on the other hand have a certain flexibility so that the interface inner part can be pushed into the interface outer part.

In addition to the previously proposed interface, the invention also proposes a tillage implement with a base unit, a front attachment that can be connected to the base unit, and an interface for connecting the front attachment to the base unit, the interface being designed according to one of the previously described embodiments, and wherein the The interface outer part is assigned in particular to the front attachment and the interface inner part is assigned to the base device. The soil cultivation device can be, for example, a vacuum cleaner, a mopping device, a polishing device, a grinding device, a lawn mower or the like. The soil tillage implement has a basic implement and a front implement or several front attachments, which can optionally be connected to the basic implement, provided that the respective codes of the interface outer part and the interface inner part can be combined with one another. A power supply, an electric motor, a motor-blower unit, a liquid tank or the like can be provided in the base unit, for example. The attachment is used to process a surface and can have, for example, a cleaning brush, a wipe, a wiping roller, a polishing plate or the like. Soil cultivation equipment can also provide combined functions, such as a wiping and suction function. All features and advantages described in relation to the interface also apply accordingly to the soil cultivation device according to the invention with such an interface.

Finally, the invention also proposes a basic device of a tillage device with an interface inner part, which for Connection is formed with an outer interface part of an attachment to be connected to the base unit, the inner interface part being an inner interface part of a previously described interface. Likewise, an attachment for a tillage implement is proposed, the attachment having an outer interface part which is designed for connection to an inner interface part of a basic device to be connected to the attachment device, the outer interface part being an outer interface part of a previously described interface. The features and advantages described above with regard to the interface also apply correspondingly to the basic device or the front device.

Brief description of the drawings

Fig. 1

ein erfindungsgemäßes Bodenbearbeitungsgerät mit einem Basisgerät und einem Vorsatzgerät;

Fig. 2

einen Teilbereich des Bodenbearbeitungsgerätes mit einer Schnittstelle zur Verbindung des Basisgerätes mit dem Vorsatzgerät;

Fig. 3

ein Schnittstelleninnenteil gemäß einer ersten Ausführungsform;

Fig. 4

ein Schnittstelleninnenteil gemäß einer zweiten Ausführungsform;

Fig. 5

ein Schnittstellenaußenteil gemäß einer ersten Ausführungsform;

Fig. 6

ein Schnittstellenaußenteil gemäß einer zweiten Ausführungsform;

Fig. 7

ein Schnittstellenaußenteil gemäß einer dritten Ausführungsform;

Fig. 8

eine Explosionsdarstellung einer Schnittstelle mit einem Schnittstelleninnenteil, einem Kontaktträger und einem Schnittstellenaußenteil;

Fig. 9

das Schnittstelleninnenteil in einem Längsschnitt;

Fig. 10

einen Längsschnitt durch die Schnittstelle ohne Schnittstellenaußenteil;

Fig. 11

ein Schnittstelleninnenteil mit einem Dichtelement;

Fig. 12

die Schnittstelle in einer perspektivischen Außenansicht;

Fig. 13

einen Längsschnitt der Schnittstelle;

Fig. 14

ein Schnittstelleninnenteil gemäß einer ersten Ausführungsform;

Fig. 15

ein Schnittstelleninnenteil gemäß einer zweiten Ausführungsform;

Fig. 16

ein Schnittstellenaußenteil gemäß einer ersten Ausführungsform;

Fig. 17

ein Schnittstellenaußenteil gemäß einer zweiten Ausführungsform;

Fig. 18

ein Schnittstellenaußenteil gemäß einer dritten Ausführungsform;

Fig. 19

eine Schnittstelle mit einem Schnittstellenaußenteil gemäß einer weiteren Ausführungsform;

Fig. 20

ein Schnittstelleninnenteil gemäß einer weiteren Ausführungsform.

The invention is explained in more detail below on the basis of exemplary embodiments. Show it:

Fig. 1

a soil tillage implement according to the invention with a basic implement and a front implement;

Fig. 2

a portion of the tillage implement with an interface for connecting the base implement to the attachment implement;

Fig. 3

an interface inner part according to a first embodiment;

Fig. 4

an interface inner part according to a second embodiment;

Fig. 5

an interface outer part according to a first embodiment;

Fig. 6

an interface outer part according to a second embodiment;

Fig. 7

an interface outer part according to a third embodiment;

Fig. 8

an exploded view of an interface with an interface inner part, a contact carrier and an interface outer part;

Fig. 9

the interface inner part in a longitudinal section;

Fig. 10

a longitudinal section through the interface without interface outer part;

Fig. 11

an interface inner part with a sealing element;

Fig. 12

the interface in a perspective external view;

Fig. 13

a longitudinal section of the interface;

Fig. 14

an interface inner part according to a first embodiment;

Fig. 15

an interface inner part according to a second embodiment;

Fig. 16

an interface outer part according to a first embodiment;

Fig. 17

an interface outer part according to a second embodiment;

Fig. 18

an interface outer part according to a third embodiment;

Fig. 19

an interface with an outer interface part according to a further embodiment;

Fig. 20

an interface inner part according to a further embodiment.

Description of the embodiments

Figure 1 shows an example of a soil cultivation device 2, which is designed here as a hand vacuum cleaner. The soil tillage implement 2 has a base implement 3 and a front attachment 4, which are connected to one another via an interface 1. The attachment 4 here is, for example, an electric brush with a rotatingly driven bristle element (not shown), a suction mouth 31 and an adjoining suction channel 7, which is connected via the interface 1 to a corresponding suction channel 7 of the basic device 3. The front attachment 4 has wheels 30, with which the user is able to push the tillage implement 2 over a surface to be cleaned. The base device 3 has, for example, a telescopic handle 32 with which the user can adjust the height of the tillage device 2 to his body size. A handle 33 with a switch 34 is arranged on the handle 32. The Switch 34 is used, for example, to switch a suction blower (not shown) on the soil cultivating device 2 on and off or to select different cleaning stages.

As in the Figures 1 and 2 Shown in more detail, the base unit 3 is also pivotally mounted to the front unit 4. The interface 1 is used to connect an interface outer part 5 of the attachment 4 to an interface inner part 6 of the base device 3. The interface 1 provides a suction channel connection, a mechanical connection and also an electrical connection between the base device 3 and the attachment 4. In principle, different attachments 4 can be connected to the base device 3, provided that the interface outer part 5 of the respective attachment 4 is compatible with the interface inner part 6 of the base device 3.

Since, for example, when using low-voltage attachments 4, compatibility with high-voltage basic devices 3 must be ruled out for safety reasons, a coding of the interface inner parts 6 and interface outer parts 5 is proposed which only allows a defined combination of devices 3, 4. A combination of low voltage devices and high voltage devices can thus be prevented. Base devices 3 and attachments 4, which are not matched to one another in terms of their operating points by electrical consumers, can therefore not be connected to one another via the interface 1. This prevents, for example, a combination of devices 3, 4 from different device generations that are not coordinated with one another from causing malfunction or damage to the devices 3, 4.

The Figures 3 and 4 show examples of possible interface inner parts 6. Die Figures 5 to 7 show exemplary interface outer parts 5. Die Interface outer parts 5 are here (according to the Figures 1 and 2 ) only assigned to the front attachment 4 by way of example, while the interface inner parts 6 are assigned to the base unit 3. However, it goes without saying that the base unit 3 can also provide an interface outer part 5, while the attachment unit 4 has the interface inner part 6. The in the Figures 3 and 4 inner interface parts 6 shown are each with different copies of the interface outer parts 5 according to the Figures 5 to 7 compatible. Here the assignment is such that the interface inner part 6 according to Figure 3 to the interface outer parts according to Figures 5 and 6 fits, while the interface inner part 6 according to Figure 4 to the interface outer parts 5 according to the Figures 6 and 7 fits. As a result, a combination between the interface inner part 6 according to FIG Figure 3 and the interface outer part 5 according to Figure 7 prevented. The interface outer part 5 also fits according to Figure 5 not according to the interface inner part 6 Figure 4 ,

Specifically, for example, in Figure 3 shown interface inner part 6 two different shape coding element pairs 17, 19. The shape coding element pair 17 has two shape coding elements 15 designed as semicircular material cutouts, based on the section shown. The form coding element pair 19, on the other hand, has two form coding elements 14 designed as plugs. Both the shape coding elements 14 and the shape coding elements 15 are arranged mirror-symmetrically to a longitudinal axis of the interface inner part 6 shown, which here is also the axis of symmetry. According to the interface inner part 6 Figure 3 corresponds optimally to the in Figure 5 Interface outer part 5 shown, which has two form coding element pairs 16 and 18. The shape coding element pair 16 has two shape coding elements 15 which correspond to the shape coding elements 15 in accordance with Figure 3 correspond while the shape coding elements 14 of the Interface outer part 5 according to Figure 5 to the shape coding elements 14 of the interface inner part 6 according to Figure 3 correspond. This means that the shape coding elements 14 according to FIG Figure 5 Bushings for the plug-shaped shape coding elements 14 according to Figure 3 represent and the shape coding elements 15 are semicircular projections in cross section, which in the semicircular material recesses of the interface inner part 6 according Figure 3 fit. The interface inner part 6 according to Figure 3 and the interface outer part 5 according to Figure 5 preferably belong to a basic device 3 and an attachment device 4, which belong to the same device generation. These can thus be connected to form an interface 1 and are therefore compatible with one another.

But other combinations of those in the Figures 3 to 7 Interface outer parts 5 and interface inner parts 6 shown are possible. For example, in Figure 6 outer interface part 5 shown at least via socket-like shape coding elements 14, into which the plug-like shape coding elements 14 of the interface inner part 6 according to Figure 3 can be inserted. However, that also fits in Figure 4 Interface part 6 shown to the in Figure 6 outer interface part 5 shown, since this has at least no outwardly facing shape coding elements 15 (see for example Figure 5 ) which prevent the insertion of the interface inner part 6 into the interface outer part 5.

Figure 8 shows in an exploded view an exemplary interface 1 with an interface inner part 6 and an interface outer part 5. The interface inner part 6 includes a contact carrier 8. The contact carrier 8 is used to connect to a corresponding contact device (not shown) of the interface outer part 5 and thus to establish an electrical connection between electrical components of the base unit 3 and the attachment device 4. For example, a power supply device of the base device 3 can provide energy for an electrical consumer of the attachment device 4 via the contact carrier 8 of the interface 1. The contact carrier 8 has a total of five electrical contacts 9, 10, 11, 12, 13. The electrical contacts 9, 10, 11 are used here, for example, for the power supply, while the electrical contacts 12, 13 can be provided as reserve contacts, for example for signal transmission between the Base unit 3 and the front unit 4. The electrical contacts 9, 10, 11, 12, 13 are suspended in the contact carrier 8 in a floating manner, ie they can be displaced relative to the housing of the contact carrier 8 in order to withstand a steady wobble between the interface inner part 6 and the interface outer part 5 to be able to prevent damage to the electrical contacts 9, 10, 11, 12, 13. Here, the floating suspension allows, for example, a play of 1.1 mm between the electrical contacts 9, 10, 11, 12, 13 of the contact carrier 8 and corresponding electrical contacts of the interface outer part 5.

This in Figure 8 The interface inner part 6 shown represents a partial area of the suction channel 7 with a suction channel end section 20. The size of a cross-sectional area 21 of the suction channel 7 increases starting from the suction channel end section 20 in a direction facing away from the interface outer part 5. Related to the in Figure 9 Longitudinal section shown, the peripheral surface 26 of the interface inner part 6 has a profile with a plurality of steps that perform different functions. For example, the interface inner part 6 has two circumferential tracks 22 which protrude in the radial direction beyond the adjacent peripheral sections of the interface inner part 6 and thus serve to space the interface outer part 5 from the adjacent peripheral sections of the interface inner part 6. The peripheral tracks 22 are defined fitting rings, via which the actual contact between the interface inner part 6 and the interface outer part 5 takes place. The peripheral surface 26 of the interface inner part 6 is stepped a number of times in order to facilitate the joining of the interface parts 5, 6. Furthermore, the peripheral surface 26 of the interface inner part 6 has a groove 27, into which the in the Figures 10 and 11 shown sealing element 28 can be inserted. The sealing element 28 is an elastic sealing ring which, regardless of the quality of the fit of the outer interface part 5 and the inner interface part 6, ensures the tightness of the interface 1.

The in Figure 8 The illustrated suction channel end section 20 of the interface inner part 6 can also be used for a direct suction function, ie for using the basic device 3 without a connected attachment 4, wherein suction material can be sucked directly into the tillage device 2 via the interface outer part 5. For this purpose, the suction channel end section 20 is preferably equipped with an end-side wear zone which has material properties such as abrasion resistance, resistance to staining and mechanical strength. The suction channel end section 20 can preferably be held detachably on the suction channel 7.

Figure 8 shows the interface outer part 5, which has a contact carrier receptacle 36. The interface outer part 5 is pushed over the interface inner part 6 such that the contact carrier 8 is simultaneously inserted into the contact carrier receptacle 36. The contact carrier receptacle 36 preferably has a corresponding contact device for the electrical contacts 9, 10, 11, 12, 13 of the contact carrier 8. In the connected state of the interface outer part 5 and the interface inner part 6, the interface inner part 6 forms an inner tube stiffening of the suction channel 7, since with respect to an axial section of the suction channel 7, end regions of the interface outer part 5 and the interface inner part 6 are concentric with one another lie. This results in increased flexural strength. The contact carrier receptacle 36 of the interface outer part 5 has on the one hand an opening 37 through which an actuating element 23 of the contact carrier 8 remains accessible from the outside and on the other hand a recess 24 through which the into the Figures 10 and 13 illustrated locking element 38 of the actuating element 23 can engage in order to lock the interface inner part 6 with the interface outer part 5 and thus to close the interface 1. As a result, the front attachment 4 is securely held on the base unit 3.

The actuating element 23 can, for example, as in FIG Figure 10 shown - be pivotably mounted on the interface inner part 6 via a pivot axis 39, the mobility of the actuating element 23 being made possible by the opening 37 of the interface outer part 5. If a user wants to separate the interface outer part 5 from the interface inner part 6, ie the attachment 4 from the base device 3, he presses from the outside through the opening 37 onto the actuating element 23, whereby this pivots about the pivot axis 39 and the latching element 38 of the actuating element 23 the recess 24 of the interface outer part 5 is moved out. The front attachment 4 can then be removed from the base unit 3. When the interface 1 is closed, ie when the interface inner part 6 and the interface outer part 5 are joined, an oblique contact surface 25 of the latching element 38 can also facilitate snapping into the recess 24 of the interface outer part 5, so that the interface parts 5, 6 can be latched to one another without the user must actuate the actuating element 23. Furthermore, it can also be provided that the locking element 38 is also beveled on the opposite vertical surface, so that a direct pull-off function is created which makes it possible to detach the interface outer part 5 from the interface inner part 6 without the user actuating the actuating element 23 got to.

Figure 12 shows a three-dimensional external view of the interface 1, in which the interface outer part 5 is connected to the interface inner part 6. The construction of the interface 1 enables stepless transitions between the interface inner part 6 and the interface outer part 5 both with respect to the transition of the suction channel 7 and also the actuating element 23, which corresponds to the shape of the interface outer part 5.

The Figures 14 to 18 show further, similar to that in the Figures 3 to 7 schematically represented codes, possible interface inner parts 6 ( Figures 14 and 15 ) and possible interface outer parts 5 ( Figures 16, 17 and 18 ). This in Figure 14 The interface inner part 6 shown has, on the one hand, plug-in elements 40 and, on the other hand, ribs 35 as shape coding elements 14, 15, which optimally match the in FIG Figure 16 Interface outer part 5 shown can be combined, which has corresponding ribs 35 and plug openings 41 as shape coding elements 14, 15. However, the interface inner part 6 shown in FIG. 14 is also the same as in FIG Figure 17 Interface outer part 5 shown compatible, since this has no ribs 35, but at least plug openings 41, in which corresponding plug elements 40 can engage. This in Figure 18 interface outer part 5 shown, however, is not in accordance with the interface inner part 6 Figure 14 can be combined since it has no plug openings 41 for the plug elements 40. This in Figure 18 interface outer part 5 shown, however, is with the interface inner part 6 according to Figure 15 can be combined (like the one in Figure 17 Interface outer part 5) shown, since that in Figure 15 shown interface inner part 6 has neither ribs 35 nor plug-in elements 40 and thus the suction channel end section 20 of the interface inner part 6 can be inserted into the outer interface part 5 without obstacles.

The Figure 19 shows a different embodiment of an interface outer part 5, into which a suction channel end section 20 of an interface inner part 6 is inserted. The interface outer part 5 has a suction channel end section 20 which is angled from the rest of the suction channel 7, so that the flow path through the suction channel 7 has a changing flow cross section. The interface outer part 5 can for example be a nozzle with an angled air duct.

Figure 20 finally shows an attachment 4 or an interface inner part 6, which is designed as a minimized insertion accessories. The interface inner part 6 has a suction channel 7 with a suction mouth 31, as well as on the end side opposite the suction mouth 31, radially outwardly facing lamellae 29, which are designed as sealing and holding lamellae and serve for a sealing connection of the interface inner part 6 with a corresponding interface outer part 5. <b> List of reference symbols </b> 1 interface 26 peripheral surface 2 Harrow 27 groove 3 basic unit 28 sealing element 4 header 29 lamella 5 Interface outer part 30 wheel 6 Interface inner part 31 saugmund 7 suction 32 stalk 8th contact support 33 handle 9 Elektrokontakt 34 switch 10 Elektrokontakt 35 rib 11 Elektrokontakt 36 Contact support receptacle 12 Elektrokontakt 37 opening 13 Elektrokontakt 38 locking element 14 Shape coding element 39 swivel axis 15 Shape coding element 40 plug-in element 16 Shape coding element pair 41 plug-in opening 17 Shape coding element pair 18 Shape coding element pair 19 Shape coding element pair 20 Saugkanalendabschnitt 21 Cross sectional area 22 circumferential path 23 actuator 24 recess 25 contact area

Claims (12)

Interface (1) for a soil tillage implement (2) with a base unit (3) and a front attachment (4) which can be connected to the base unit (3), the interface (1) being an outer interface part (5) and a shape-corresponding to the outer interface part (5) The interface inner part (6) has a suction channel (7) and a contact carrier (8) arranged outside the suction channel (7) with a plurality of electrical contacts (9, 10, 11, 12, 13) and wherein the outer interface part (5) has a plurality of corresponding electrical contacts, characterized in that the outer interface part (5) and the inner interface part (6) furthermore each have at least two form coding element pairs (16, 17, 18, 19), a first form coding element pair (16 ) of the interface outer part (5) in position and shape corresponding to a first pair of shape coding elements (17) of the cut is formed inside the part (6), and wherein a second pair of shape coding elements (18) of the outer interface part (5) is designed to correspond in position and shape to a second pair of shape coding elements (19) of the inner interface part (6), each pair of shape coding elements (16, 17, 18, 19 ) has two shape-coding elements (14, 15) of identical shape and formed separately from one another. Interface (1) according to claim 1, characterized in that the first shape coding element pairs (16, 17) differ in terms of their shape and their position at the interface (1) from the second shape coding element pairs (18, 19). Interface (1) according to claim 1 or 2, characterized in that a suction channel end section (20) of the suction channel (7) of the interface inner part (6) is inserted into the interface outer part (5) when the interface (1) is connected, the axial overlap of the interface inner part (6) and interface outer part (5) being at least 20 mm, preferably at least 25 mm. Interface (1) according to one of the preceding claims, characterized in that the contact carrier (8) has more than three electrical contacts (9, 10, 11, 12, 13), in particular three electrical contacts (9, 10, 11) for a power supply to the Attachment device (4) by the base device (3) and at least one additional electrical contact (12, 13) for signal transmission between the base device (3) and the attachment device (4). Interface (1) according to one of the preceding claims, characterized in that, starting from a suction channel end section (20) , the interface inner part (6) has a cross-sectional area (21) which gradually increases in the axial direction of the suction channel (7), in particular individual circumferential tracks (22 ) a circumferential surface (26) of the interface inner part (6) protrude radially outwards compared to adjacent surface partial areas of the circumferential surface (26), the circumferential tracks (22) of the interface inner part (6) with the interface (1) closed against corresponding radially inward projecting circumferential tracks ( 22) of the interface outer part (5) and thereby spacing adjacent partial surface areas from one another. Interface (1) according to one of the preceding claims, characterized in that a suction channel end section (20) of the suction channel (7) of the interface inner part (6) has an abrasion-resistant soft material. Interface (1) according to one of the preceding claims, characterized in that the interface inner part (6), in particular the contact carrier (8), has an actuating element (23) which can be snapped into a shape-corresponding opening (37) in the outer interface part (5), wherein the actuating element (23) has a latching element (38) which can be latched into a recess (24) in the outer interface part (5). Interface (1) according to claim 7, characterized in that the latching element (38) and / or a border of the recess (24) is an inclined contact surface (25) in the joining direction and / or opposite to the joining direction for the sliding overcoming of the border by the latching element (38). Interface (1) according to one of the preceding claims, characterized in that an outwardly facing peripheral surface (26) of the interface inner part (6) has a circumferential groove (27) in which a shape-corresponding sealing element (28) is arranged. Soil cultivation device (1) with a basic device (3), a front device (4) that can be connected to the basic device (3) and an interface (1) for connecting the front device (4) to the basic device (3), characterized in that the interface ( 1) is designed according to one of the preceding claims, wherein in particular the interface outer part (5) is assigned to the front attachment (4) and the interface inner part (6) is assigned to the base unit (3). Basic device (3) of a soil cultivation device (2) with an interface inner part (6), which for connection to an interface outer part (5) of an attachment (4) to be connected to the base device (3), characterized in that the interface inner part (6) is an interface inner part (6) of an interface (1) designed according to one of claims 1 to 9. Front attachment (4) for a tillage implement (2), the front attachment (4) having an interface outer part (5), which is designed for connection to an interface inner part (6) of a base unit (3) to be connected to the front attachment (4), thereby characterized in that the interface outer part (5) is an interface outer part (5) of an interface (1) designed according to one of claims 1 to 9.

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