DE102018118086A1 - Interface for a tillage implement with a basic implement and a front 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 front unit (4), it is proposed that the interface outer part (5) and the interface inner part (6) furthermore each have at least two form 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 wherein 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) is formed.

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 basic device to be connected to the attachment device.

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, the basic device of which has an energy 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.

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 can also be provided for different generations of devices. The coding can as mentioned previously, 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.

It is further proposed that the first shape coding element pairs differ from the second shape coding element pairs in terms of their shape and their position at the interface. 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 a plurality of 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 attachment device and the respective second shape coding element pair does not prevent a connection, the respective base device and attachment 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 inserted or inserted be arranged on the interface inner part and the interface outer part, or vice versa.

Furthermore, it is proposed that the electrical contacts be arranged displaceably on the interface inner part and / or the interface outer part, wherein a movement play of a pair of electrical contacts made of corresponding electrical contacts of the interface inner part and the interface outer part is in particular at least 1 mm. According to this embodiment, the electrical contacts are preferably suspended in a floating manner on the contact carrier or the interface inner part or the interface outer part. 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, i.e. H. Movable, 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 circumferential surface of the interface inner part projecting radially outwards compared to adjacent partial surface areas of the circumferential surface, the circumferential tracks of the interface inner part at closed interface butt against corresponding radially inwardly projecting circumferential paths of the interface outer part 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 inner part of the interface and the outer part of the interface then takes place when the interface is 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 optimal abrasion resistance, prevention of discoloration and mechanical strength. For example, the abrasion-resistant soft material can be a synthetic rubber material. The soft material is preferably removably arranged on the suction channel. Thus, the user can 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 fits into a Recess of the interface outer part can be snapped into place. 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 particularly proposed oblique contact surface of the latching element and / or the border of the recess ensures that the latching can also be carried out and / or released when the actuating element is not actuated. In particular, it can be achieved that the interface outer part can be pulled off 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 can provide the required frictional connection to the inner surface of the interface outer part, 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 the features and advantages described in relation to the interface also apply accordingly to the tillage implement according to the invention with such an interface.

Finally, the invention also proposes 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, the interface inner part being an interface inner part of a previously described interface. A header device for a soil cultivation device is also proposed. wherein the attachment has an interface outer part, which is designed for connection to an interface inner part of a base device to be connected to the attachment, the Outer interface part is 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.

list of figures

• 1 ein erfindungsgemäßes Bodenbearbeitungsgerät mit einem Basisgerät und einem Vorsatzgerät;
• 2 einen Teilbereich des Bodenbearbeitungsgerätes mit einer Schnittstelle zur Verbindung des Basisgerätes mit dem Vorsatzgerät;
• 3 ein Schnittstelleninnenteil gemäß einer ersten Ausführungsform;
• 4 ein Schnittstelleninnenteil gemäß einer zweiten Ausführungsform;
• 5 ein Schnittstellenaußenteil gemäß einer ersten Ausführungsform;
• 6 ein Schnittstellenaußenteil gemäß einer zweiten Ausführungsform;
• 7 ein Schnittstellenaußenteil gemäß einer dritten Ausführungsform;
• 8 eine Explosionsdarstellung einer Schnittstelle mit einem Schnittstelleninnenteil, einem Kontaktträger und einem Schnittstellenaußenteil;
• 9 das Schnittstelleninnenteil in einem Längsschnitt;
• 10 einen Längsschnitt durch die Schnittstelle ohne Schnittstellenaußenteil;
• 11 ein Schnittstelleninnenteil mit einem Dichtelement;
• 12 die Schnittstelle in einer perspektivischen Außenansicht;
• 13 einen Längsschnitt der Schnittstelle;
• 14 ein Schnittstelleninnenteil gemäß einer ersten Ausführungsform;
• 15 ein Schnittstelleninnenteil gemäß einer zweiten Ausführungsform;
• 16 ein Schnittstellenaußenteil gemäß einer ersten Ausführungsform;
• 17 ein Schnittstellenaußenteil gemäß einer zweiten Ausführungsform;
• 18 ein Schnittstellenaußenteil gemäß einer dritten Ausführungsform;
• 19 eine Schnittstelle mit einem Schnittstellenaußenteil gemäß einer weiteren Ausführungsform;
• 20 ein Schnittstelleninnenteil gemäß einer weiteren Ausführungsform.

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

• 1 a soil tillage implement according to the invention with a basic implement and a front implement;
• 2 a portion of the tillage implement with an interface for connecting the base implement to the attachment implement;
• 3 an interface inner part according to a first embodiment;
• 4 an interface inner part according to a second embodiment;
• 5 an interface outer part according to a first embodiment;
• 6 an interface outer part according to a second embodiment;
• 7 an interface outer part according to a third embodiment;
• 8th an exploded view of an interface with an interface inner part, a contact carrier and an interface outer part;
• 9 the interface inner part in a longitudinal section;
• 10 a longitudinal section through the interface without interface outer part;
• 11 an interface inner part with a sealing element;
• 12 the interface in a perspective external view;
• 13 a longitudinal section of the interface;
• 14 an interface inner part according to a first embodiment;
• 15 an interface inner part according to a second embodiment;
• 16 an interface outer part according to a first embodiment;
• 17 an interface outer part according to a second embodiment;
• 18 an interface outer part according to a third embodiment;
• 19 an interface with an outer interface part according to a further embodiment;
• 20 an interface inner part according to a further embodiment.

Description of the embodiments

1 shows an example of a soil tillage implement 2 , which is designed here as a hand vacuum cleaner. The tillage implement 2 has a basic device 3 and a header 4 which via an interface 1 are interconnected. The front attachment 4 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 over the interface 1 with an appropriate suction channel 7 of the basic device 3 connected is. The front attachment 4 has wheels 30 with which the user pushes the tillage implement 2 over a surface to be cleaned. The basic device 3 has a telescopic handle, for example 32 , with which the user determines the height of the tillage implement 2 can adapt to his height. On the stem 32 is a handle 33 with a switch 34 arranged. The desk 34 is used, for example, to switch a suction blower (not shown) on the tillage implement on and off 2 or to select different cleaning levels.

As in the 1 and 2 the basic device is shown in more detail 3 furthermore pivotable to the front attachment 4 stored. the interface 1 serves to connect an external interface part 5 of the front attachment 4 with an interface inner part 6 of the basic device 3 , the interface 1 provides a suction channel connection, a mechanical connection and also an electrical connection between the base unit 3 and the front attachment 4 ready. To the basic device 3 can fundamentally different attachments 4 be connected, provided the interface outer part 5 of the respective front attachment 4 compatible with the interface inner part 6 of the basic device 3 is.

Because, for example, when using low-voltage attachments 4 compatibility with high-voltage basic devices 3 must be excluded for security reasons, a coding of the interface inner parts 6 and interface outer parts 5 suggested that only a defined combination of devices 3 . 4 allows. A combination of low voltage devices and high voltage devices can thus be prevented. base units 3 and attachments 4 , which are not matched to one another in terms of their working points by electrical consumers therefore not via the interface 1 be connected to each other. This prevents, for example, a combination of devices 3 . 4 from different device generations that are not coordinated with each other, to a malfunction or damage to the devices 3 . 4 to lead.

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

Specifically, for example, in 3 shown interface inner part 6 two different shape coding element pairs 17 . 19 on. The pair of shape encoding elements 17 has two shape coding elements designed as semicircular material recesses with respect to the section shown 15 on. The pair of shape encoding elements 19 however, has two form coding elements designed as plugs 14 on. Both the shape coding elements 14 , as well as the shape coding elements 15 are mirror-symmetrical to a longitudinal axis of the interface inner part shown 6 , which is also the axis of symmetry here. To the interface inner part 6 according to 3 corresponds optimally to the in 5 shown outer interface part 5 , which two pairs of shape coding elements 16 and 18 having. The pair of shape encoding elements 16 has two shape coding elements 15 that go to the shape encoding elements 15 according to 3 correspond while the shape coding elements 14 of the interface outer part 5 according to 5 to the shape coding elements 14 of the interface inner part 6 according to 3 correspond. This means that the shape coding elements 14 according to 5 Bushings for the plug-shaped form coding elements 14 according to 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 to 3 fit. The interface inner part 6 according to 3 and the interface outer part 5 according to 5 preferably belong to a basic device 3 and a front attachment 4 which belong to the same generation of devices. These are therefore one interface 1 connectable and therefore compatible with each other.

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

8th shows an example of an interface in an exploded view 1 with an interface inner part 6 and an interface outer part 5 , To the interface inner part 6 belongs to a contact carrier 8th , The contact carrier 8th serves for connection to a corresponding contact device (not shown) of the interface outer part 5 and thus for establishing an electrical connection between electrical components of the basic device 3 and the front attachment 4 , For example, a power supply device of the basic device 3 over the contact carrier 8th the interface 1 Energy for an electrical consumer of the front attachment 4 provide. The contact carrier 8th has a total of five electrical contacts here 9 . 10 . 11 . 12 . 13 , The electrical contacts 9 . 10 . 11 serve 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 attachment 4 , The electrical contacts 9 . 10 . 11 . 12 . 13 are floating in the contact carrier 8th suspended, ie these are relative to the housing of the contact carrier 8th relocatable to a constant wobble between the interface inner part 6 and the interface outer part 5 withstand and damage to the electrical contacts 9 . 10 . 11 . 12 . 13 to prevent. Here, for example, the floating suspension enables a play of 1.1 mm between the electrical contacts 9 . 10 . 11 . 12 . 13 of the contact carrier 8th and corresponding electrical contacts of the interface outer part 5 ,

This in 8th shown interface inner part 6 represents a section 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 starts from the suction channel end section 20 into one of the interface outer part 5 facing away from. Related to the in 9 shown longitudinal section has the peripheral surface 26 of the interface inner part 6 a profile with a variety of levels that perform different functions. For example, the interface inner part 6 two circumferential orbits 22 on that in the radial direction over the adjacent peripheral portions of the interface inner part 6 protrude and thus to space the interface outer part 5 opposite the adjacent peripheral portions of the interface inner part 6 serve. The circumferential orbits 22 are defined fitting rings, through which the actual contact between the interface inner part 6 and the interface outer part 5 takes place. The peripheral area 26 of the interface inner part 6 is tiered a total of several times to join the interface parts 5 . 6 to facilitate. The peripheral surface also has 26 of the interface inner part 6 over a groove 27 in which that in the 10 and 11 shown sealing element 28 can be inserted. The sealing element 28 is an elastic sealing ring, which is independent of the quality of the fit of the interface outer part 5 and interface inner part 6 the tightness of the interface 1 guaranteed.

The in 8th 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 attached attachment 4 , suction material directly over the interface outer part 5 in the tillage implement 2 can be sucked in. The suction channel end section 20 is preferably equipped with a wear zone at the end, which has material properties such as abrasion resistance, resistance to staining and mechanical strength. The suction channel end section 20 can preferably be removable on the suction channel 7 be kept.

8th shows the interface outer part 5 which has a contact carrier receptacle 36 having. The interface outer part 5 is so over the interface inner part 6 pushed that the contact carrier 8th at the same time in the contact carrier holder 36 is inserted. The contact carrier holder 36 preferably has a corresponding contact device for the electrical contacts 9 . 10 . 11 . 12 . 13 of the contact carrier 8th on. The interface inner part 6 forms in the connected state of the interface outer part 5 and interface inner part 6 a pipe stiffening of the suction channel 7 , because related to an axial section of the suction channel 7 end areas of the interface outer part 5 and the interface inner part 6 are concentric. This results in increased flexural strength. The contact carrier holder 36 of the interface outer part 5 has an opening on the one hand 37 through which an actuator 23 of the contact carrier 8th remains accessible from the outside and on the other hand a recess 24 , through which the in the 10 and 13 locking element shown 38 of the actuator 23 can intervene to the interface inner part 6 with the interface outer part 5 to lock and thus the interface 1 close. This will make the front attachment 4 securely on the base unit 3 held.

The actuator 23 can for example - as in 10 shown - over a swivel axis 39 pivotable on the interface inner part 6 be stored, the mobility of the actuating element 23 through the opening 37 of the interface outer part 5 is made possible. If a user the interface outer part 5 from the interface inner part 6 want to disconnect, ie the front attachment 4 from the base unit 3 , he pushes from the outside through the opening 37 on the actuator 23 , which makes this about the pivot axis 39 pivots and the locking element 38 of the actuator 23 out of the recess 24 of the interface outer part 5 is moved out. Then the attachment can 4 from the base unit 3 subtracted from. When closing the interface 1 , ie when joining the inner part of the interface 6 and interface outer part 5 , can also have an inclined contact surface 25 of the locking element 38 snapping into the recess 24 of the interface outer part 5 facilitate, so the interface parts 5 . 6 can be locked together without the user having the actuating element 23 must press. Furthermore, it can also be provided that the latching element 38 is also beveled on the opposite vertical surface, so that a direct trigger function is created which enables the interface outer part 5 from the interface inner part 6 to solve without the user having the actuator 23 must press.

12 shows a three-dimensional external view of the interface 1 , in which the interface outer part 5 with the interface inner part 6 connected is. The construction of the interface 1 enables stepless transitions between the interface inner part 6 and the interface outer part 5 both related to the transition of the suction channel 7 , as well as the corresponding shape in the interface outer part 5 fitted actuator 23 ,

The 14 to 18 show further, similar to that in the 3 to 7 schematically shown codes, possible interface parts 6 ( 14 and 15 ) and possible external interface parts 5 ( 16 . 17 and 18 ). This in 14 shown interface inner part 6 points as shape coding elements 14 . 15 on the one hand plug elements 40 and ribs on the other 35 on that optimally with the in 16 shown outer interface part 5 can be combined, which corresponding ribs 35 as well as plug openings 41 as shape coding elements 14 . 15 having. However, that is in 14 shown interface inner part 6 also with the in 17 shown outer interface part 5 compatible, since this has no ribs 35 has, but at least plug openings 41 , in which corresponding plug elements 40 can intervene. This in 18 shown outer interface part 5 however, is not with the interface inner part 6 according to 14 can be combined, as this has no openings 41 for the plug elements 40 having. This in 18 shown outer interface part 5 however, is with the interface inner part 6 according to 15 can be combined (like the one in 17 shown outer interface part 5 ) because that in 15 shown interface inner part 6 neither ribs 35 still plug elements 40 and thus the suction channel end section 20 of the interface inner part 6 without obstacles in the interface outer part 5 can be inserted.

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

20 finally shows a front attachment 4 or an interface inner part 6 , which is designed as a minimized plug-in accessory. The interface inner part 6 has a suction channel 7 with a suction mouth 31 on, as well as on the suction mouth 31 opposite radially outward facing slats 29 , which are designed as sealing and holding lamellae and a sealing connection of the interface inner part 6 with a corresponding interface outer part 5 serve.

LIST OF REFERENCE NUMBERS

1

interface

2

Harrow

3

basic unit

4

header

5

Interface outer part

6

Interface inner part

7

suction

8th

contact support

9

Elektrokontakt

10

Elektrokontakt

11

Elektrokontakt

12

Elektrokontakt

13

Elektrokontakt

14

Shape coding element

15

Shape coding element

16

Shape coding element pair

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

26

peripheral surface

27

groove

28

sealing element

29

lamella

30

wheel

31

saugmund

32

stalk

33

handle

34

switch

35

rib

36

Contact support receptacle

37

opening

38

locking element

39

swivel axis

40

plug-in element

41

plug-in opening

QUOTES INCLUDE IN THE DESCRIPTION

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Patent literature cited

• EP 0666051 B1 [0007]

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 location inner part (6) is formed, and wherein a second pair of shape coding elements (18) of the interface outer part (5) is designed to correspond in position and shape to a second pair of shape coding elements (19) of the interface inner part (6). Interface (1) after Claim 1 , characterized in that the first shape coding element pairs (16, 17) differ from the second shape coding element pairs (18, 19) in terms of their shape and their position at the interface (1). Interface (1) after 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) 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 inwardly 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) after Claim 7 , characterized in that the latching element (38) and / or a border of the recess (24) has 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 is designed for connection to an interface outer part (5) of an attachment device (4) to be connected to the base device (3), characterized in that the interface inner part (6) 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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