DE102019135085A1 - Treatment device for the treatment of, in particular, liquid fluids as well as connection head of a treatment device - Google Patents

Abstract

The invention relates to a treatment device (10), in particular a filter device, for a fluid, in particular for a liquid fluid, with an exchangeable treatment unit (14) and with a connection head (12), the connection head (12) and the treatment unit (14) can be connected to one another by means of a releasable bayonet-like connecting device (34) with an insertion / rotary movement about a connecting axis (20) of the treatment device (10) and the connecting device (34) has at least one housing connecting part (100) and at least one head connecting part ( 32) which each have at least one complementary functional element (44, 104). According to the invention, the head connecting part (32) is fastened to the connection head (12) with screws (52), the screws (52) with their axis of rotation ( 51) at a distance from the connection axis (20) on a circular line (35) around the connection axis (20) and in an assembly direction of the S. screws (52) are arranged obliquely to the connection axis (20).

Description

Technical area

The invention relates to a treatment device, in particular a filter device for the treatment, in particular filtration, of in particular liquid fluids, in particular fuel, oil or water, in particular of an internal combustion engine, in particular of a motor vehicle, with an exchangeable treatment unit. The invention also relates to a connection head for a treatment device.

State of the art

From the WO 2015091665 A1 a filter is known for filtering especially liquid fluids, especially fuel or oil, especially an internal combustion engine, with a filter bowl in which a filter element is arranged and a filter head which has an inlet and / or an outlet for the fluid. The filter head and the filter bowl are connected to one another by means of a detachable bayonet-type plug / rotary connection. The plug / rotary connection has at least two interacting locking components, one of which is connected to the filter bowl and one is connected to the filter head.

Disclosure of the invention

The invention is based on the object of creating a treatment device with an exchangeable treatment unit in which the treatment unit can be exchanged in a simple and space-saving manner.

Another object is to create a connection head for such a treatment device.

The aforementioned object is achieved according to one aspect of the invention by a treatment device, in particular a filter device, for a fluid, in particular for a liquid fluid, with an exchangeable treatment unit, which has a housing with a housing pot, a housing cover, at least one inlet for the fluid to be treated and at least one outlet for the treated fluid, and with a connection head, the at least one inlet for the fluid to be treated, which can be connected to the at least one inlet, and / or at least one outlet for the treated fluid which is connected to the at least one Outlet is connectable, has, wherein the connection head and the treatment unit can be connected to one another by means of a detachable bayonet-like connection device with execution of a plug / rotary movement around a connection axis of the treatment device and the connection device at least one housing connection part on the side of the Geh äuses and at least one head connection part on the side of the connection head, which are operatively connectable to each other to establish a connection of the connecting device, wherein the housing connection part and the head connection part in the circumferential direction around the connection axis each have at least one mutually complementary functional element that can be operatively connected to each other are. At least one of the mutually complementary functional elements has an assembly ramp. The head connection part is fastened to the connection head with screws, the screws being arranged with their axis of rotation spaced apart from the connection axis on a circular line around the connection axis and at an angle to the connection axis in a mounting direction of the screws.

The further object is achieved according to a further aspect of the invention by a connection head for a treatment device for connection to a treatment unit, which has a housing with a housing pot, a housing cover, at least one inlet for the fluid to be treated and at least one outlet for the treated fluid Fluid, wherein the connection head of the treatment device can be connected to the treatment unit by means of a releasable bayonet-like connection device while executing a plug / rotary movement around a connection axis of the treatment device and the connection device has at least one head connection part on the side of the connection head which is used to connect the connection device to at least a housing connecting part is formed on the housing side, at least one inlet of the connection head with the at least one inlet for the fluid to be treated and / or at least one outlet of the connection head s can be connected to the at least one outlet for the treating fluid. The head connecting part has at least one functional element, the at least one functional element being operatively connectable to at least one functional element of the housing connecting part and having a mounting ramp. The head connection part is fastened to the connection head with screws, the screws being arranged with their axis of rotation spaced apart from the connection axis on a circular line around the connection axis and at an angle to the connection axis in a mounting direction of the screws.

Favorable configurations and advantages of the invention emerge from the further claims, the description and the drawing.

A treatment device, in particular a filter device, for a fluid, in particular for a liquid fluid, proposed with an exchangeable treatment unit, which has a housing with a housing pot, a housing cover, at least one inlet for the fluid to be treated and at least one outlet for the treated fluid, and with a connection head that has at least one inlet for the fluid to be treated, which can be connected to the at least one inlet, and / or at least one outlet for the treated fluid, which can be connected to the at least one outlet. The connection head and the treatment unit can be connected to one another by means of a detachable bayonet-like connecting device while performing a plugging / rotating movement about a connecting axis of the treatment device. The connection device has at least one housing connection part on the housing side and at least one head connection part on the connection head side, which can be operatively connected to one another in order to establish a connection of the connection device. The housing connecting part and the head connecting part each have at least one mutually complementary functional element in the circumferential direction around the connecting axis, which functional element can be operatively connected to one another. At least one of the mutually complementary functional elements has an assembly ramp.

According to the invention, the head connection part is fastened to the connection head with screws, the screws being arranged with their axis of rotation spaced from the connection axis on a circular line around the connection axis and at an angle to the connection axis in a mounting direction of the screws.

The connection head has an annular bent sheet metal part as a head connection part, which provides a bayonet interface and is screwed to the connection head with several screws, the screws with their axis of rotation spaced apart from the connection axis on a circular line and in an assembly direction of the screws that are not parallel, but is inclined to the connection axis, are arranged. The screw axis, viewed in the direction of the connecting axis, preferably runs in a plane approximately tangential to the circular line. This can be achieved, for example, in that a plateau is provided as a support surface for the screw head on the head connecting part, which is inclined accordingly.

The at least one functional element engages behind the at least one complementary functional element of the connecting device. In this way, a connection between the at least one functional element and the corresponding complementary functional element can be implemented axially to the connection axis.

The at least one functional element can advantageously extend circumferentially with respect to the connection axis in order to implement the bayonet-like connection.

The at least one functional element and the corresponding functional element interacting with it are advantageously designed to be complementary. In this way they can lie flat against one another in the closed position of the connecting device. In this way, power transmission can be improved. A load on the components involved can be further reduced in this way. The components can be dimensioned smaller in order to transmit the same forces. Due to the mutually adapted course of the two connecting parts, the axial dimensions of the connecting parts can be reduced accordingly. Advantageously, the connecting parts can be mutually engaging molded parts. The contours of the at least one functional element and the corresponding complementary functional element can slide along one another when the connecting device is opened or closed.

According to a favorable embodiment of the treatment device, the screws can each be inclined with their axis of rotation relative to a plane tangential to the circular line by an angle in the direction of the connecting axis, the angle between 0 ° and 8 °, preferably between 2 ° and 7 °, being particularly preferred can be between 4 ° and 5 °. This results in a favorable force curve for the screw connection. The assembly of the head connecting part is also facilitated in this way.

According to a favorable embodiment of the treatment device, a projection of the axis of rotation of the respective screw on a plane tangential to the circular line can be inclined at an angle to a projection of the connecting axis on this plane, the angle between 10 ° and 30 °, preferably between 15 ° and 25 ° ° can lie. This results in a favorable force curve for the screw connection. The assembly of the head connecting part is also facilitated in this way.

According to a favorable embodiment of the treatment device, a flat plateau can be arranged on the head connecting part as a contact surface for the respective screw head of the screws, which has a height offset of at most 300 μm to the surface of the mounting ramp facing away from the contact area. In particular, the plateau can have a radially outer step which has a greater height offset than a radially inner step of the plateau. This enables the plateau to be inclined. The axis of rotation of the screw is aligned perpendicular to the plateau. Due to the slope of the plateau, a defined Inclination of the screw relative to the connection axis and / or relative to the plane tangential to the circular line can be specified.

According to a favorable embodiment of the treatment device, the screws can each be arranged centrally on the mounting ramp in the circumferential direction of the head connecting part. The screws can advantageously be screwed into threaded elements arranged on the connection head from the side facing the treatment unit. This enables a stable and reliable connection between the connection head and the head connection part to be achieved.

An end stop, in particular a latching element, can advantageously adjoin the respective support area in the circumferential direction. In this way, a defined position of the connection between the connection head and the treatment unit of the treatment device can be achieved with respect to one another.

Advantageously, the at least one of the mutually complementary functional elements has a mounting ramp that merges into a support area that is perpendicular to the connection axis, while the other of the mutually complementary functional elements has a sliding area, which is followed by a support area that is perpendicular to the connection axis. In this case, in a connection end position of the connection device, the two support areas are positioned one above the other in relation to the connection axis.

According to a favorable embodiment of the treatment device, at least one of the functional elements can have at least one latching element, in particular a latching projection or a latching section or a recess, at least one latching device, which latches one behind the other, with one another or with one another in the closed position of the at least one connecting device. With the locking device, a risk can be reduced that the connection device can become loose due to an undesired rotation of the treatment unit about the connection axis.

To close and release the at least one locking device, the corresponding locking elements can be separated from one another or guided past one another by the corresponding rotation of the treatment unit. For this it may be necessary to overcome corresponding locking forces. It is also easy to determine when the treatment unit is in its correct position at such an increased expenditure of force during attachment.

The connecting device can advantageously have at least one prestressing element for realizing a mechanical prestressing with which the mutually complementary functional elements can be pressed against one another. In this way, the connecting device can be kept under mechanical tension. Operational vibrations can be dampened in this way. Operational noises can also be reduced. In particular, any rattling can be prevented. Furthermore, any latching force that has to be overcome to close or open the latching can be generated or increased.

The at least one prestressing element can advantageously be arranged on the connection head. In this way, it can be designed as a lifetime component. It does not have to be exchanged together with the treatment center. Alternatively or additionally, at least one prestressing element can be arranged on the housing. It can thus be exchanged together with the treatment center.

The at least one prestressing element can advantageously be elastic. The at least one prestressing element can be elastic due to its shape and / or its material composition. The at least one prestressing element can advantageously comprise or be made from plastic, in particular elastomer. The at least one prestressing element can advantageously be or have a spring element, in particular a bent wire part. It can advantageously be made of an elastic metal.

The at least one prestressing element can additionally exercise a sealing function. The at least one prestressing element can be combined with a seal or sealing unit or vice versa. Additionally or alternatively, the at least one prestressing element can be implemented with a non-return membrane of the treatment unit or vice versa. The non-return membrane can advantageously be used to close a passage of the housing for fluid, preferably the at least one inlet, in a flow direction. In this way, backflow of the fluid can be prevented.

According to a favorable embodiment of the treatment device, the treatment unit, in particular the housing cover and / or an end plate of any filter element, and the connection head can each have at least one correspondence element, in particular a nozzle, preferably a connection nozzle and / or connection nozzle and / or sealing nozzle and / or cylinder nozzle, have, which correspond in pairs when the treatment unit is installed. In particular, at least one pair of Correspondence elements can be arranged within at least one other pair of correspondence elements. In this way, the correspondence elements can be fixed radially with respect to the connection axis relative to one another. Alternatively, the correspondence elements can be arranged in butt joint pairs, in particular with a sealing device interposed. In this way, radial position tolerances can be easily compensated for with respect to the connection axis.

Advantageously, at least one pair of correspondence elements can delimit a fluid-carrying space radially on the outside and / or radially on the inside.

In a further advantageous embodiment, at least one pair of correspondence elements can be arranged within at least one other pair of correspondence elements. In this way, a first fluid-conducting area, in particular an outlet channel for the fluid, can be implemented in the inner pair of correspondence elements.

Between the inner pair of correspondence elements and the outer pair of correspondence elements, a second fluid-conducting area, in particular an inlet annular space for the fluid, can advantageously be realized.

The correspondence elements, in particular the pairs of correspondence elements, can each be coaxial with the connecting axis. In this way, they can be positioned relative to one another more easily. Furthermore, the fluid-carrying areas can thus be more uniform in terms of their circumference.

At least one pair of correspondence elements, in particular a radially outer pair of correspondence elements, can advantageously circumferentially surround a plurality of fluid-carrying areas, in particular at least one inlet area and at least one outlet area for the fluid. In this way, the corresponding fluid-carrying areas can easily be delimited from the surroundings with just a pair of correspondence elements. In this case, contact areas between the corresponding elements of a pair can optionally be sealed with just a single sealing unit.

Advantageously, the connecting parts of the connecting device can be arranged radially outside the pair of correspondence elements, which can circumferentially surround all fluid-carrying areas. In this way, the fluid-carrying areas can be separated from the connecting parts of the connecting device, preferably also from the surroundings, with only one pair of correspondence elements, possibly with only one sealing device. The connecting parts of the connecting device can thus easily be protected from fluid.

Advantageously, at least one sealing device, in particular an annular seal, preferably an O-ring seal or a combined seal-non-return membrane, can be arranged between the correspondence elements of at least one pair. In this way, the fluid-carrying area of the contact area of the connecting pieces delimited by the at least one pair of correspondence elements can be better sealed.

At least one spacer can advantageously be provided between the treatment unit, in particular the end disk of the filter element. The spacer can be a plastic spacer. This has the advantage of being easier to manufacture.

According to a favorable embodiment of the treatment device, the head connection part and / or the housing connection part can be made of sheet metal or have sheet metal. Sheet metal can usually be present in its initial state as rolled metal in the form of flat, flat sheets or strips. Sheet metal can easily be made with a uniform material thickness. A mechanically stable connecting part can also be made from sheet metal with a relatively small material thickness. In this way, the required installation space, in particular in the axial direction, of the connecting device can be reduced. Sheet metal can easily be processed or processed, in particular bent, folded, punched, cut or welded. With sheet metal, connections between components, in particular flanged connections or welded connections, can easily be realized. Advantageously, at least one of the connecting parts can be designed as a formed sheet metal part.

According to a favorable embodiment of the treatment device, the head connecting part can be designed in the form of a ring. In the case of an annular arrangement, a bayonet-like connection between the connection head and the treatment unit can be implemented particularly easily by connecting the parts to one another in a screw-shaped manner.

An outer ring seal of a sealing device can advantageously be arranged radially inside the housing connecting part. At least one fluid-carrying region of the treatment device can thus be sealed off from the surroundings with at least one sealing device. The outer ring seal advantageously protrudes beyond the connecting device in the axial direction by a maximum of 5 mm upwards or downwards. This is Advantageous with regard to the utilization of the installation space, since the sealing area uses the axial extent of the connecting device.

Preferably, the at least one sealing device can circumferentially surround the at least one inlet and the at least one outlet with respect to the connection axis. In this way, with only one seal, several, in particular all, fluid-carrying spaces can be sealed off from the outside, in particular towards the surroundings and / or towards the connecting parts of the connecting device.

The at least one sealing device, in particular a ring seal or in a ring seal unit, can advantageously be arranged as close as possible to the connection axis, that is to say have the smallest possible diameter. In this way, a force which can be exerted on the connecting device by the at least one sealing device in the axial direction can be reduced. The connecting parts of the connecting device can thus be mechanically relieved. Because the at least one sealing device has the smallest possible diameter, the torque required for opening or closing the connecting device can be reduced. In this way, the required opening or closing forces can be reduced accordingly. This can have an advantageous effect on the ease of maintenance and / or the resilience of the treatment unit.

The at least one sealing device can advantageously have an O-ring or a molded seal. The sealing device can advantageously have a sealing effect radially with respect to the connection axis, in particular to the outside or to the inside. Additionally or alternatively, the at least one sealing device can act sealingly in the axial direction.

The sealing groove of the sealing unit can be covered with a separate cover ring on its side facing away from the filter bellows. The cover ring can be connected to the outer sealing socket by means of clamping lugs.

In a preferred embodiment, the sealing groove of the sealing unit is not formed by means of a separate cover ring, but as part of the housing cover in one piece with the housing cover. This can have an advantageous effect on the resilience of the treatment unit.

At least one sealing device can advantageously be arranged on the treatment unit, in particular the housing cover and / or, if appropriate, the end disk of the filter element. In this way, the at least one sealing device can be exchanged together with the treatment unit.

The at least one head connection part and / or the at least one housing connection part can each be implemented with a material thickness that is small in comparison to their radial and circumferential expansion with respect to the connection axis. The material thicknesses of the at least one head connection part and the at least one housing connection part can be similar.

In a further advantageous embodiment, the material thickness of the at least one head connection part and / or of the at least one housing connection part can advantageously be a maximum of 3 mm, preferably between 1 mm and 2 mm.

The two connecting parts can be correspondingly shaped from semi-finished products or molded parts, in particular bent, folded, kinked, cut or punched or the like. In this way, the corresponding latching sections can optionally be implemented.

Advantageously, at least a part of the semifinished product or the molded parts can be provided radially inside the head connecting parts, which are formed from semifinished products or molded parts, in particular bent, folded, kinked, cut or punched or the like. The part of the semifinished product or the molded parts arranged radially inside the head connecting parts is advantageously closed in the circumferential direction. As a result, the stability of the connecting device and thus the rigidity and long-term load capacity of the connection between the connecting devices can be improved.

The two connecting parts can advantageously be arranged radially within at least one circumferential wall of the housing and / or the connection head. In this way, the bayonet-like connecting device can be protected from the environment. The connecting device can advantageously be arranged in a corresponding connecting space between the housing and the connection head.

Advantageously, the at least one functional element can bear against the corresponding complementary support area over as large as possible, preferably its entire extent in the circumferential direction and in the radial direction with respect to the connection axis. In this way, a power transmission between the connecting parts can be improved. Appropriate Guide contours of the at least one complementary support area can slide along corresponding guide contours of the corresponding support area when the connecting device is opened and closed.

In a further advantageous embodiment, a material thickness of the at least one head connection part and / or of the at least one housing connection part can be constant in the circumferential direction at least in the area of the support areas. In this way, the particularly axial space requirement of the connecting device can be reduced.

In a further advantageous embodiment, the at least one support area and at least the support area interacting with it can each have an approximately helical course around the connection axis. In this way, when the treatment unit is rotated in the closing direction of rotation by means of the connecting parts, the housing connection part can simultaneously be drawn in the axial direction towards the connection head. A combined insertion / rotation movement can be implemented in this way. The slopes of the at least one support area and of the at least one complementary support area can advantageously be identical.

In this way, any pretensioning element and / or a seal can be axially compressed when the connecting device is closed. In the case of a seal, the sealing function can also be improved in this way.

The pitches can advantageously correspond to the pitch of a customary right-hand thread. In this way, as is customary in particular with fuel filters or oil filters, the connection device can be closed in clockwise direction by turning the treatment unit and opened in the opposite direction.

A height axially to the connection axis, which is covered when the bayonet-like connection device is closed, can advantageously correspond to an axial distance between a possible seal on the side of one of the connection parts and a corresponding sealing surface on the side of the other connection part. In this way, the plug-in / rotary connection can be used to position the corresponding seal on the corresponding sealing surface when the connection device is closed.

At least one of the connecting parts can advantageously be connected to the treatment unit in a fixed or detachable manner. At least one of the connecting parts can be connected to the connection head in a fixed or detachable manner. The at least one connecting part can be connected to the treatment unit or the connection head by means of a material-locking and / or force-locking and / or form-locking connection, in particular by means of a flanged connection, a welded connection, a clamp connection, a latching connection, a plug connection, a screw connection and / or an adhesive connection be.

Advantageously, the head connecting part can preferably be screwed or welded onto the connection head. By using a screw connection, the head connection part can easily be detached from the connection head if necessary.

Advantageously, the housing cover can in particular be elastically deformable. It can thus be pressed against the connection head by an overpressure prevailing in the housing, in particular during operation of the treatment device. The connection head can thus support the housing cover. In this way, the requirements for the pressure stability of the housing cover can be reduced. The housing cover can thus be realized more simply, in particular from simpler materials.

Advantageously, a plurality of functional elements of the at least one head connection part and corresponding complementary functional elements of the at least one housing connection part can be arranged circumferentially, in particular evenly distributed, with respect to the connection axis. In this way, a power transmission that is particularly uniform over the circumference can be improved. Furthermore, an overall angle of rotation which is required for closing and opening the connecting device can be reduced in this way. The circumferential extension of each individual functional element can be less than when using only a single pair of a functional element and a corresponding complementary functional element. In order to achieve a comparable, uniform transmission of force, a single pair of functional elements would have to extend at least once over the entire circumference.

The treatment device can advantageously be a filter device for filtering liquid fluids, in particular fuel, oil or water. The filter device can advantageously be used in an internal combustion engine.

A treatment unit for a treatment device, in particular a filter device, has a housing with a housing pot, a housing cover, at least one inlet for the fluid to be treated and at least an outlet for the treated fluid. In this case, the treatment unit can be connected to a connection head of the treatment device by means of a detachable bayonet-like connection device while executing a plugging / rotating movement about a connection axis of a treatment device. Furthermore, the connection device has at least one housing connection part on the housing side, which is designed to connect the connection device to at least one head connection part on the connection head side, the at least one inlet having at least one inlet of the connection head for the fluid to be treated and / or the at least one outlet can be connected to at least one outlet of the connection head for the fluid to be treated.

Furthermore, the at least one housing connecting part has at least one functional element which can be effectively connected to at least one complementary functional element of the head connecting part.

According to a further aspect of the invention, a connection head for such a treatment device is proposed in which, according to the invention, at least one head connection part is provided which has at least one functional element, the at least one functional element being operatively connectable to at least one functional element of the housing connection part. The head connection part is fastened to the connection head with screws, the screws being arranged with their axis of rotation spaced apart from the connection axis on a circular line around the connection axis and at an angle to the connection axis in a mounting direction of the screws.

The advantages and features shown in connection with the treatment device according to the invention and its advantageous embodiments apply accordingly to the treatment unit according to the invention and the connection head according to the invention and their advantageous embodiments and vice versa.

According to a favorable embodiment of the connection head, the screws can each be inclined with their axis of rotation relative to a plane tangential to the circular line at an angle in the direction of the connection axis, the angle between 0 ° and 8 °, preferably between 2 ° and 7 °, being particularly preferred is between 4 ° and 5 °. This results in a favorable force curve for the screw connection. The assembly of the head connecting part is also facilitated in this way.

According to a favorable embodiment of the connection head, a projection of the axis of rotation of the respective screw on a plane tangential to the circular line can be inclined at an angle to a projection of the connection axis on this plane, the angle between 10 ° and 30 °, preferably between 15 ° and 25 ° ° can lie. This results in a favorable force curve for the screw connection. The assembly of the head connecting part is also facilitated in this way.

According to a favorable embodiment of the connection head, a flat plateau can be arranged on the head connection part as a contact surface for the respective screw head of the screws, which has a height offset of at most 300 μm to the surface of the mounting ramp facing away from the support area. In particular, the plateau can have a radially outer step which has a greater height offset than a radially inner step of the plateau. This enables the plateau to be inclined. The axis of rotation of the screw is aligned perpendicular to the plateau. Due to the inclination of the plateau, a defined inclination of the screw with respect to the connecting axis and / or with respect to the plane tangential to the circular line can be specified.

According to a favorable embodiment of the connection head, the at least one functional element can have a mounting ramp which merges into the support area which is perpendicular to the connection axis. Alternatively, the at least one functional element can have a sliding area which merges into the support area which is perpendicular to the connection axis.

According to a favorable embodiment of the connection head, the screws can be arranged with their axis of rotation perpendicular to the mounting ramp of the functional element. This enables a flat support surface for the screw head to be achieved.

According to a favorable embodiment of the connection head, the screws can each be arranged centrally on the mounting ramp in the circumferential direction of the head connecting part. The screws can advantageously be screwed into threaded elements arranged on the connection head from the side facing the treatment unit. This enables a stable and reliable connection between the connection head and the head connection part to be achieved.

The connecting part can advantageously be fastened to the housing by means of a flanged connection between the housing cover and the housing pot. In addition, the connecting part can be fastened to the housing cover and / or to the housing pot on the housing by means of a material connection, in particular a welded connection. In this way, the housing Connection part be stably connected to the treatment unit. It can be exchanged together with this so easily.

The housing connecting part can advantageously be held on the housing by means of a flanged connection formed between the housing cover and the housing pot.

The head connection part can advantageously be fastened in the connection head by means of a screw connection.

The housing connecting part can advantageously be flush in the axial direction with the axially outermost surface of the flanged connection provided between the housing cover and the housing pot.

Advantageously, the housing cover can be tightly connected to the housing pot using sealing material, in particular sealing compound, in particular by means of a flanged connection.

According to a favorable embodiment of the connection head, the at least one functional element can each have at least one latching element, in particular a latching projection or a latching section or a recess, at least one latching device.

According to a favorable embodiment of the connection head, the head connection part can be made of sheet metal or have sheet metal. Sheet metal can usually be present in its initial state as rolled metal in the form of flat, flat sheets or strips. Sheet metal can easily be made with a uniform material thickness. A mechanically stable connecting part can also be made from sheet metal with a relatively small material thickness. In this way, the required installation space, in particular in the axial direction, of the connecting device can be reduced. Sheet metal can easily be processed or processed, in particular bent, folded, punched, cut or welded. With sheet metal, connections between components, in particular flanged connections or welded connections, can easily be realized. Advantageously, at least one of the connecting parts can be designed as a formed sheet metal part.

According to a favorable embodiment of the connection head, the head connecting part can be designed in the form of a ring. In the case of an annular arrangement, a bayonet-like connection between the connection head and the treatment unit can be implemented particularly easily by connecting the parts to one another in a screw-shaped manner.

The at least one functional element can each have an approximately helical course around the connection axis.

The housing cover can preferably have sheet metal. A material thickness of the housing cover can advantageously be 0.4 mm - 1 mm. An outer ring seal can be arranged radially inward of the housing connector. The material thickness of the at least one housing connection part and / or the head connection part can advantageously be a maximum of 3 mm, preferably between 1 mm and 2 mm.

The treatment unit can advantageously be an easy-change filter, in particular an easy-change oil filter or an easy-change fuel filter. The housing of the treatment unit can then be a filter housing. At least one filter element can advantageously be arranged in the filter housing in such a way that it can separate the at least one inlet from the at least one outlet. The connection head can advantageously be a filter head on which the replaceable filter, in particular the filter housing, can be detachably mounted by means of the connecting device.

A replaceable filter is usually a filter in which the at least one filter element is exchanged together with the filter housing. As a rule, the at least one filter element is fixedly arranged in the filter housing. Accordingly, the connections between the housing pot and the housing cover do not have to be detachable in a non-destructive manner.

The invention is not limited to a treatment device of an internal combustion engine of a motor vehicle. Rather, it can also be used in other types of internal combustion engines, in particular industrial engines. The invention can also be used in other types of treatment devices for fluid inside or outside of automotive engineering. The invention can also be used with air / oil separators or desiccant boxes.

Figure list

• 1 eine isometrische Darstellung einer Behandlungsvorrichtung nach einem Ausführungsbeispiel der Erfindung, insbesondere einer Filtervorrichtung für Motoröl einer Brennkraftmaschine eines Kraftfahrzeugs, mit einer Behandlungseinheit und einem Anschlusskopf;
• 2 eine isometrische Darstellung der Behandlungseinheit nach 1 mit Draufsicht auf das Gehäuse-Verbindungsteil;
• 3 einen Längsschnitt der Behandlungsvorrichtung nach 1;
• 4 eine Detailansicht der Behandlungsvorrichtung nach 1 mit aufgeschnittenem Gehäuse;
• 5 eine isometrische Darstellung des Anschlusskopfes der Behandlungsvorrichtung nach 1 mit Blick auf das Kopf-Verbindungsteil im Inneren des Anschlusskopfes;
• 6 eine isometrische Darstellung des Kopf-Verbindungsteils nach 5;
• 7 eine isometrische Darstellung des Gehäuse-Verbindungsteils nach 2;
• 8 eine Seitenansicht des Kopf-Verbindungsteils nach 5 mit Neigung der Drehachse der Schraube zur Verbindungachse;
• 9 eine Seitenansicht des Kopf-Verbindungsteils nach 5 mit Neigung der Drehachse der Schraube zu einer tangentialen Ebene;
• 10 ein Detail des Kopf-Verbindungsteils nach 5 mit einem Plateau, an dem der Schraubenkopf anliegt, das eine radial äußeren Stufe aufweist;
• 11 ein Detail des Kopf-Verbindungsteils nach 5 mit einem Plateau, an dem der Schraubenkopf anliegt, das eine radial innere Stufe aufweist.

Further advantages emerge from the following description of the drawings. Exemplary embodiments of the invention are shown in the drawings. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into useful further combinations.

• 1 an isometric view of a treatment device according to an embodiment of the invention, in particular a filter device for engine oil Internal combustion engine of a motor vehicle, with a treatment unit and a connection head;
• 2 an isometric view of the treatment center 1 with a plan view of the housing connecting part;
• 3 a longitudinal section of the treatment device according to 1 ;
• 4th a detailed view of the treatment device according to 1 with cut open housing;
• 5 an isometric view of the connection head of the treatment device according to 1 with a view of the head connection part inside the connection head;
• 6th an isometric view of the head connector 5 ;
• 7th an isometric view of the housing connector according to 2 ;
• 8th a side view of the head connector according to 5 with inclination of the axis of rotation of the screw to the connection axis;
• 9 a side view of the head connector according to 5 with inclination of the axis of rotation of the screw to a tangential plane;
• 10 a detail of the head connector according to 5 with a plateau on which the screw head rests, which has a radially outer step;
• 11 a detail of the head connector according to 5 with a plateau on which the screw head rests, which has a radially inner step.

Embodiment (s) of the invention

In the figures, the same or similar components are numbered with the same reference numerals.

In the 1 to 4th is a first embodiment of a treatment device 10 in the form of a filter device for a liquid fluid, for example engine oil of an engine oil circuit of an internal combustion engine of a motor vehicle, and its components shown in different perspectives, sections and detailed views. The treatment device 10 is used, for example, to clean the engine oil.

1 shows an isometric view of the treatment device 10 with a treatment unit 14th and a connection head 12th . 2 shows an isometric view of the treatment center 14th with a top view of a housing connecting part 100 , which in this embodiment has four functional elements 104 having. 3 shows a longitudinal section of the treatment device 14th . 4th shows a detailed view of the treatment device 14th with the housing cut open 56 .

The treatment device 10 includes the connection head 12th in the form of a filter head on which as a treatment unit 14th a replaceable filter is detachably attached. The connection head 12th is firmly connected to the internal combustion engine and serves as a connection part for the treatment unit 14th . The connection head 12th is in detail in the 5 shown. The connection head 12th includes an inlet 16 and a sequence 18th for the engine oil. The inflow 16 and the process 18th are connected to corresponding oil lines of the internal combustion engine in a manner not detailed here.

The connection head 12th also has one with respect to a connection axis 20th coaxial radially inner connection piece 22nd on.

If “axial”, “radial”, “coaxial”, “circumferential” or the like are mentioned in the following, this refers to the connection axis, unless otherwise stated 20th . In the embodiment shown, the connecting axis falls 20th with a filter axis of the treatment unit 14th together.

The inner connection piece 22nd is approximately circular cylindrical. It extends on the side of the connection head 12th which of the treatment center 14th is facing. It is open on both of its front sides. On its the treatment center 14th the opposite side is the inner connection piece 22nd fluidly with the process 18th connected.

The inner connection piece 22nd is coaxial with a circular cylindrical, radially outer connection piece 24 surround. The inner connection piece 22nd towers over the treatment center 14th facing side the outer connection piece 24 in the axial direction.

The inner connection piece 22nd and the outer connection piece 24 delimit a coaxial inlet annulus on the circumferential side 26th . The inlet annulus 26th is via a fluid connection with the inlet 16 connected.

The inner connection piece 22nd and the outer connection piece 24 are coaxial with a circular cylindrical peripheral wall 28 surround. That of the treatment center 14th facing free edge of the peripheral wall 28 is located approximately at the same axial height as the free edge of the outer connection piece 24 .

5 shows an isometric view of the connection head 12th the treatment device 10 to 1 with a view of the head connector 32 inside the connection head 12th . 6th Figure 3 shows an isometric view of the head connector 12th to 5 . 7th shows an isometric view of the complementary housing connecting part 100 .

In the design of the connection head 12th to 5 forms the peripheral wall 28 a radially outer limitation of an axially outer part of the connection head 12th on the treatment center 14th remote side. Partly covered by the peripheral wall 28 is a splash guard 150 arranged. The splash guard 150 is made of vulcanized elastomer or thermoplastic elastomer (TPE), for example. The splash guard 150 and the outer connection piece 24 delimit an annular coaxial connection space on the circumferential side 30th .

In the connecting room 30th is a head connector 32 a releasable bayonet-like connecting device 34 arranged. With the connecting device 34 is the treatment center 14th detachable on the connection head 12th attached. This is in the treatment center 14th a complementary housing connector 100 arranged.

The overall approximately annular head connecting part 32 is preferably formed from sheet metal. The thickness of the sheet is constant about 2 mm to 3 mm.

The head connection part faces radially inward 32 an annular head mounting portion 36 on. The head mounting section 36 abuts with its radially inner circumferential side approximately on the radially outer circumferential side of the outer connecting piece 24 . The head mounting section 36 extends approximately in one plane radially and circumferentially. The head connector 32 extends radially approximately to the middle of the connecting space 30th .

The head mounting section 36 in this example goes into four functional elements at the top 44 in the form of bayonet sections above, as in the detailed illustration in 5 is recognizable. Instead of four functional elements 44 three or five can also be provided.

The functional elements at the head 44 are identical in shape and size. The functional elements at the head 44 are arranged evenly distributed around the circumference. The functional elements at the head 44 each have a circumferential section 40 which is essentially circumferentially parallel to an imaginary circular cylinder jacket around the connecting axis 20th extends. The perimeter section 40 has a relatively short contact area 45 on, which is perpendicular to the connection axis 20th is arranged. The respective functional elements 44 has a mounting ramp running obliquely in the axial direction 43 on that in the relatively short edition range 45 passes over with a locking element 46 as an end stop 47 ends at which a return to the adjacent head mounting section 36 connects.

The perimeter sections 40 so connect the head mounting sections 36 with the respective mounting ramps 43 . The assembly ramps 43 are particularly in the 6th clearly visible.

The assembly ramps 43 each have an approximately helical course around the connecting axis 20th . The slope of the inclined assembly ramps 43 corresponds roughly to the pitch of a normal right-hand thread. From the treatment center 14th When viewed axially, the free ends of the mounting ramps are at the front in a clockwise direction 43 viewed closer to the treatment center 14th than the clockwise rear ends. Between the front ends of the mounting ramps 43 and the plane of the head mounting section 36 there is in each case a gap through the corresponding complementary housing-side functional elements explained in more detail below 104 can be introduced in the form of bayonet sections.

The head connector 32 is with screws 52 on the connection head 12th attached, with the screws 52 with their axis of rotation 51 spaced from the connection axis 20th on a circular line around the connection axis 20th and in a mounting direction of the screws 52 oblique to the connection axis 20th are arranged. The screws 52 are aligned so that they are with their axis of rotation 51 , in the direction of the connection axis 20th seen, are arranged in a plane approximately tangential to the circular line. The axis of rotation 51 the screw 52 is in 5 for the sake of clarity only with one screw 52 shown. In particular, is the axis of rotation 51 with respect to a plane tangential to the circular line 35 ( 6th ) at an angle in the direction of the connection axis 20th inclined, the angle being between 0 ° and 8 °, preferably between 2 ° and 7 °, particularly preferably between 4 ° and 5 °.

Next are the screws 52 with their axis of rotation 51 perpendicular to a contact surface of the screw head on the mounting ramp 43 of the functional element 44 arranged. As in particular in 6th , which is the head connector 32 separately shows, can be seen are the screws 52 in the circumferential direction of the head connecting part 32 in holes 48 each in the middle of the assembly ramp 43 arranged. The screws 52 are different from that of the treatment center 14th facing side in on the connection head 12th arranged threaded elements 39 screwed in.

The sheet metal of the head connector 32 is in the head mounting section 36 , in the perimeter sections 40 and in the assembly ramps 43 essentially the same thickness. This also means that it is in the head mounting section 36 and in the assembly ramps 43 has a uniform axial extension. As in the 8-11 is described in detail is a plateau 59 ( 8-11 ) provided as a support surface for the screw head, which has a height offset of a few hundred microns and is itself inclined from radially outside to radially inward, the height offset being greater radially outside than radially inside.

The functional elements 44 each have a head-side locking projection 46 on. The locking projections 46 are as respective bends in the functional elements 44 realized. The locking projections 46 rise axially on the treatment center 14th facing side.

With the connecting device 34 is the treatment center 14th detachable on the connection head 12th attached. This is in the treatment center 14th a complementary housing connector 100 arranged, the complementary functional elements 104 having. 7th shows an isometric view of the housing connector 100 to 2-4 that with the head connector 32 cooperates.

The housing connector 100 the connecting device 34 is preferably formed from sheet metal as an annular coaxial element. A thickness of the sheet metal of the housing connector 100 corresponds approximately to the thickness of the sheet metal of the head connection part 32 .

The housing connector 100 extends radially from the radially outer peripheral side of the housing cover 60 ( 4th ) to over the radial center of the connection space 30th . The housing connector 100 overlaps the head connector 32 .

The housing connector 100 has a housing mounting portion 102 which extends radially and circumferentially in approximately one plane. The case mounting section 102 is radially outside axially between the housing cover 60 and a flanged connection as an edge 57 of the housing pot 58 with the housing cover 60 fixed. It lies flat on one side of the housing cover 60 on.

The case mounting section 102 goes on its radially inner side into four identical housing-side functional elements 104 in the form of bayonet sections over. The functional elements on the housing side 104 are arranged evenly distributed around the circumference. They have roughly the shape and size of the complementary head-side functional elements 44 . Instead of four functional elements 104 three or five can also be provided.

The functional elements on the housing side 104 act complementary to the functional elements 44 , which are slightly helical, and each include a support area 105 with an extension 109 in the circumferential direction as well as a sliding area 142 at a circumferential end of the support area 105 and a locking element 106 as an end stop 107 at the opposite circumferential end of the support area 105 . When making the connection between the head connector 32 and housing connector 100 slides the sliding areas 142 on the assembly ramps 43 of the head connection part on the housing side 32 .

The respective support area 105 has a contact surface 108 on that in 7th on the invisible side of the support areas 105 is arranged and when the connection is established with the head connection part 32 in each case at the support areas 45 of the functional elements 44 issue.

The contact areas 108 are located on the housing cover 60 facing side of the respective housing-side functional element 104 . In the closed state of the connecting device 34 become the contact surfaces 108 each for the interaction of one of the head-side functional elements 44 attacked. The contact surfaces are located here 108 in each case on the corresponding areas of the functional elements 44 at.

The functional elements on the housing side 104 each have a latching projection on the housing side 110 on. The locking projections 110 rise axially from the housing cover 60 path. With the treatment center installed 14th the latching projections on the housing engage 110 behind the corresponding locking projections on the head end 46 .

The treatment center is used as an extension 14th with the housing cover 60 first coaxially on the connection side of the connection head 12th plugged.

The head connector 32 is on the head mounting section 36 with a total of four screws 52 , like in the 5 shown from that of the treatment center 14th facing side on the connection head 12th attached. The screws 52 are located in the middle of the holes 48 the mounting ramps 43 and are in threaded elements 39 in the connection head 12th screwed in.

In the connecting room 30th is also a biasing element 54 arranged coaxially. The 5 leaves the installation position in the connection head 12th detect. In the connection head 12th becomes the biasing element 54 placed in a groove with slight play and through the screwed-on head connector 32 secured. This also causes the open spring ends of the prestressing element 54 held.

The biasing element 54 is a bent wire part with several spring arms protruding outward in the radial direction 53 and is located in two to five areas on the connection head 12th or on the engine or vehicle side on and with its spring arms 53 in two to five areas on the edge 57 of the housing pot 58 the treatment center 14th . The edge 57 of the housing pot 58 can for example be designed as a flange.

According to the configuration of the connection head 12th in the 1 to 5 encloses the peripheral wall 28 an upper part of the annular splash guard 150 .

The splash guard 150 serves to protect the functional elements 44 , 104 from splash water and dust. The splash guard 150 is made of a vulcanized elastomer or a thermoplastic elastomer (TPE) and preferably seals radially against the connection head 12th and preferably axially against the edge 57 the treatment center 14th . In the area of the support of the (not visible) spring arms of the pretensioning element 54 small recesses in the form of a groove are provided. To the connection head 12th is the splash guard 150 preferably through the head connector 32 held and clamped. Alternatively, the splash guard 150 also in the connection head 12th be linked.

The splash guard 150 has an umbrella-like shape. It seals against the connection head over a small diameter 12th and on a large diameter towards the edge 57 . In the areas where the spring arms 53 of the biasing element 54 to the edge 57 protrude, the splash guard has 150 one bulge each 152 on which the respective spring arm 53 covers.

The splash guard 150 protrudes all around the edge 57 with a lip 160 . Radially within the edge 57 is another lip 162 provided, which is used for centering during assembly. The lips 160 , 162 form a sealing area 166 , which is preferably axially against the edge 57 seals.

The treatment center 14th is designed as a spin-on filter with a round cross-section. It is essentially coaxial with the connection axis 20th . The treatment center 14th has a housing 56 with a housing pot 58 on, in the open side a housing cover 60 is attached with its radially outer edge by means of a flanged connection. A radially outer diameter of the housing 56 in the area of the housing cover 60 is smaller than a radially inner diameter of the splash guard 150 of the connection head 12th . The housing pot 58 has an outwardly curved case back 62 . The housing cover 60 and the housing pot 58 are made of metal. Optionally, the housing cover 60 also with the housing pot 58 be welded.

In the housing pot 58 is a coaxial filter element 64 arranged ( 3-4 ). The filter element 64 has a to a filter bellows 66 folded, circumferentially closed filter medium. The filter bellows is on its front sides 66 each tight with a connecting end plate 68 , in the 1 above, and a counter end disk 70 below, connected. The connecting end plate 68 is located on the housing cover 60 facing side of the filter element 64 .

The filter bellows 66 surrounds an element interior 72 of the filter element 64 . The element interior 72 is located on a clean side of the filter element 64 .

The counter end disk 70 closes the element interior 72 on the case back 62 facing end face of the filter element 64 . On the case back 62 facing outside of the counter end disk 70 several spring elements are supported 74 on the other hand on the case back 62 prop up.

In the counter end disk 70 For example, a spring-loaded bypass valve (not shown) can be arranged, which in the open state, under conditions of no further interest here, an oil flow of engine oil from the housing bottom 62 directly into the element interior, bypassing the filter medium 72 allows.

The filter element 64 is radially outside of a raw-side annulus 78 surrounded by the radially inner peripheral side of the housing pot 58 is limited.

In the element interior 72 A coaxial central tube (not shown) can also be located between the counter-end disk 70 and the connection end plate 68 extend. A circumferential wall of the center pipe is permeable to the engine oil. A radially inner circumferential side, namely radially inner folded edges, of the filter bellows 66 can be supported on the radially outer circumferential side of the central tube.

The connecting end plate 68 has a coaxial outlet opening 82 for the filtered engine oil. The connection end disk is on the radially inner circumferential side 68 to a coaxial cylinder socket 83 shaped, which extends axially from the element interior 72 extends away.

On the axially the element interior 72 remote side of the cylinder connector 83 is an annular coaxial inner seal assembly 84 attached. The inner sealing unit 84 consists of an elastomer.

The inner sealing unit faces radially on the outside 84 a non-return membrane 86 on. The non-return membrane 86 is ring-shaped and surrounds the cylinder socket 83 radially outside. The non-return membrane 86 is under a mechanical bias on the filter bellows 66 facing inside of the housing cover 60 at. It closes like in the 3 shown, in the unpressurized state, a coaxial annular inlet opening 88 of the housing cover 60 for engine oil. As soon as engine oil of the treatment device 10 is supplied, the non-return membrane opens 86 due to the oil pressure in the flow direction. A return of the engine oil through the inlet port 88 is through the non-return membrane 86 prevented.

A radially inner ring portion of the inner seal assembly 84 forms a coaxial inner ring seal 90 . The inner ring seal 90 lies with its radially outer peripheral side close to the radially inner peripheral side of the cylinder connector 83 at. The inner ring seal 90 lies with its radially inner circumferential side when the treatment unit is installed 14th close to a radially outer peripheral side of the radially inner connecting piece designed as a sealing surface 22nd at. With the inner ring seal 90 is in the area of the inlet opening 88 the clean side of the treatment unit s 14 separated from its raw side.

The housing cover 60 points in the area of the inlet opening 88 a stepped coaxial outer seal stub 92 on. A constriction of the outer sealing nozzle 92 on his the filter bellows 66 axially remote end forms an outer sealing groove 94 for an outer ring seal 96 With. The outer ring seal 96 is designed as an O-ring.

A radially outer diameter of the outer sealing port 92 outside the area of the sealing groove 94 corresponds approximately to the radially inner diameter of the outer connecting piece 24 of the connection head 12th . With the treatment center installed 14th the sealing socket is in place 92 in the outer connection piece 24 . The radially outer circumferential side of the outer sealing port 92 then lies on the radially inner circumferential side of the radially outer connecting piece 24 at.

The outer sealing groove 94 is on her the filter bellows 66 axially remote side with a cover ring 98 covered. The cover ring 98 is connected to the outer sealing socket by means of clamping lugs 92 connected.

With the treatment center installed 14th lies the outer ring seal 96 on the radially inner circumferential side of the radially outer connection piece designed as a sealing surface 24 close to. The outer ring seal 96 thus separates the oil-carrying area of the treatment device 10 from the connecting room 30th and from the environment.

At the latest when the cover ring 98 on the face of the radially outer connecting piece 24 of the connection head 12th and / or the housing connecting part 100 on the head connector 32 arrives, you will receive the treatment unit 14th additionally in clockwise direction, which is the closing direction of rotation of the connecting device 34 is to the connection axis 20th turned.

As soon as the free ends of the functional elements on the housing 104 in the area of the corresponding entry gap on the head side 50 are positioned, the guidance of the respective housing-side sliding areas begins 142 on the respective mounting ramps 43 of the functional elements 44 . The spring arms 53 of the biasing element 54 support each other with their free ends with the straight sections 55 on the edge 57 of the housing pot 58 in the axial direction. Due to the slope of the mounting ramps 43 and the sliding areas 142 achieved train in the axial direction between the functional elements 44 and 104 become the inner ring seal 90 on the radially inner connecting piece 22nd and the outer ring seal 96 in the radially outer connection piece 24 drawn.

As soon as the housing-side locking projections 110 on the corresponding locking projections on the head side 46 a corresponding detent force must be overcome to continue turning. The latching force is generated by the restoring force of the spring arms of the prestressing element 54 realized with.

After the latching force has been overcome, the latching projections on the housing latch into place 110 behind the locking projections on the housing side 46 and thus secure the connecting device 34 against unintentional opening.

For separating the treatment center 14th from the connection head 12th becomes the treatment center 14th counterclockwise, i.e. in the opening direction, around the connecting axis 20th turned. To do this, the latching force of the latching projections on the housing must first be applied 110 with the locking projections on the head side 46 to be overcome.

Under the spring bias of the biasing element 54 become the inner support areas 105 along the corresponding support areas 45 the head-side functional elements 44 guided. Furthermore, the outer housing-side Support areas 105 guided along the respective guide pins. In this case, the guide pins each generate an axial pressure force on the outer support areas on the housing side 105 generated, which against a respective holding force of the inner ring seal 90 and the outer ring seal 96 Act. The holding forces are created by the friction between the inner ring seal 90 and the inner connection piece 22nd and between the outer ring seal 96 and the outer connection piece 24 realized. The inner ring seal is opened in the axial direction by means of the push-off force 90 from the inner connection piece 22nd peeled off and the outer ring seal 96 from the outer connection nozzle 24 pulled out.

As soon as the housing-side functional elements 104 the corresponding entry gaps on the head side 50 leave the treatment center 14th with an axial movement from the connection head 12th deducted.

When operating the treatment device 10 When the internal combustion engine is running, engine oil to be cleaned flows through the inlet 16 into the inlet annulus 26th . From there, the engine oil flows through the inlet opening 88 released by the non-return membrane 86 in the raw-side annulus 78 of the filter housing 56 . The engine oil to be cleaned flows through the filter bellows 66 from radially outside to radially inside and passes through the openings in the central tube 88 in the element interior 72 . From the element interior 72 the cleaned engine oil passes through the outlet opening 82 and the radially inner connecting piece 22nd of the connection head 12th the end 18th . The cleaned engine oil leaves the connection head 12th and thus the treatment device 10 through the process 18th . The direction of flow 112 is indicated by arrows.

In the 8th and 9 shows the tilting of the screws in detail 52 on the head connector 32 using one in the head connector 32 imported screw 52 in detail. 8th Figure 10 shows a side view of the head connector 32 to 5 with inclination of the axis of rotation 51 the screw 52 to the connection axis 20th . 9 Figure 10 shows a side view of the head connector 32 to 5 with inclination of the axis of rotation 51 the screw 52 to a plane tangential to the circular line 35 ( 6th ).

The axes of rotation 51 of the screws 52 are on the circular line 35 arranged ( 6th ). How 8th shows is a projection 51 the axis of rotation 52 the respective screw 52 on a plane tangential to the circular line 35 is at an angle β with respect to a projection 21 the connection axis 20th inclined to this plane. The plane is for the screw drawn in the figure 52 Oriented parallel to the image plane and indicated by a dashed rectangle. The angle β is, for example, between 10 ° and 30 °, preferably between 15 ° and 25 °.

9 shows that the screws 52 are each with their axis of rotation 51 with respect to the plane tangential to the circular line 35 at an angle α in the direction of the connection axis 20th are inclined. The plane is for the screw drawn in the figure 52 oriented perpendicular to the image plane. The angle α is between 0 ° and 8 °, preferably between 2 ° and 7 °, particularly preferably between 4 ° and 5 °.

The 10 and 11 explain how the slope of the screws 52 about the slope of the mounting ramp 43 can also be generated. 10 shows a detail of the head connector 32 to 5 with a plateau 59 on which the screw head of the screw 52 is applied, the plateau 59 a radially outer step 61 having. 11 shows a detail of the head connector 32 to 5 with a radially inner step 63 of the plateau 59 which is smaller than the radially outer step 61 . The height offset from the surface of the mounting ramp 43 which faces the screw head is preferably a maximum of 300 μm.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• WO 2015091665 A1 [0002]

Claims (16)

Treatment device (10), in particular filter device, for a fluid, in particular for a liquid fluid, with an exchangeable treatment unit (14) which has a housing (56) with a housing pot (58), a housing cover (60), at least one inlet (88 ) for the fluid to be treated and at least one outlet (82) for the treated fluid, and with a connection head (12), the at least one inlet (16) for the fluid to be treated, which can be connected to the at least one inlet (88) and / or has at least one outlet (18) for the treated fluid, which can be connected to the at least one outlet (82), wherein the connection head (12) and the treatment unit (14) by means of a detachable bayonet-like connecting device (34) can be connected to one another by performing a plugging / rotating movement about a connecting axis (20) of the treatment device (10) and the connecting device (34) has at least one housing connecting part (100) on the side of the housing (56) and at least one head connecting part (32) on the side of the connection head (12), which can be operatively connected to each other to establish a connection of the connecting device (34), the housing connecting part (100) and the head - connecting part (32) in the circumferential direction around the connecting axis (20) each have at least one mutually complementary functional element (44, 104) which can be effectively connected to one another, and wherein at least one of the mutually complementary functional elements (44) arranged in the head connecting part (32) , 104) has a mounting ramp (43, 103), characterized in that the head connecting part (32) is fastened to the connection head (12) with screws (52), the screws (52) being spaced apart with their axis of rotation (51) to the connection axis (20) on a circular line (35) around the connection axis (20) and in an assembly direction of the screws (52) at an angle to the connection axis (20). Treatment device according to Claim 1 , characterized in that the screws (52) are each inclined with their axis of rotation (51) relative to a plane tangential to the circular line (35) by an angle (a) in the direction of the connecting axis (20), the angle (a) between 0 ° and 8 °, preferably between 2 ° and 7 °, particularly preferably between 4 ° and 5 °. Treatment device according to Claim 1 or 2 , characterized in that a projection (51) of the axis of rotation (52) of the respective screw (52) on a plane tangential to the circular line (35) at an angle (β) with respect to a projection (21) of the connecting axis (20) on this The plane is inclined, the angle (β) being between 10 ° and 30 °, preferably between 15 ° and 25 °. Treatment device according to one of the preceding claims, characterized in that a flat plateau (59) is arranged on the head connecting part (32) as a contact surface for the respective screw head of the screws (52), which has a height offset of at most 300 µm to the surface of the mounting ramp ( 43) facing away from the support area (45), in particular wherein the plateau (59) has a radially outer step (61) which has a greater height offset than a radially inner step (63) of the plateau (59). Treatment device according to one of the preceding claims, characterized in that the screws (52) are arranged in the circumferential direction of the head connecting part (32) each centrally on the mounting ramp (43) and / or from the side facing the treatment unit (14) on the connection head (12) arranged threaded elements (39) are screwed. Treatment device according to one of the preceding claims, characterized in that at least one of the functional elements (44, 104) has at least one locking element (46, 106), in particular a locking projection or a locking section or a recess, at least one locking device, which in the closed position of the at least a connecting device (34) latched one behind the other, with one another or in one another. Treatment device according to one of the preceding claims, characterized in that the treatment unit (14), in particular the housing cover (60) and / or an end plate (68) of any filter element (64), and the connection head (12) each have at least one correspondence element, in particular a socket, preferably a connection socket (22, 24) and / or connection socket and / or sealing socket (92) and / or cylinder socket (83), which correspond in pairs when the treatment unit (14) is installed, in particular with at least one pair of correspondence elements ( 22, 83) is arranged within at least one other pair of correspondence elements (24, 92). Treatment device according to one of the preceding claims, characterized in that the head connecting part (32) and / or the housing connecting part (100) is made of sheet metal or has sheet metal, and / or that the head connecting part (32) is annular. Connection head (12) for a treatment device (10), in particular according to one of the Claims 1 to 8th for connection to a treatment unit (14) of the treatment device (10), which has a housing (56) with a housing pot (58), a housing cover (60), at least one inlet (88) for the fluid to be treated and at least one outlet (82) for the treated fluid, wherein the connection head (12) of the treatment device (10) by means of a detachable bayonet-like connection device (34) with execution of a plug / rotary movement about a connection axis (20) of the treatment device (10) with the treatment unit (14 ) and the connecting device (34) has at least one head connecting part (32) on the side of the connection head (12), which is used for connecting the connecting device (34) to at least one housing connecting part (100) on the side of the housing (56) is formed, wherein at least one inlet (16) of the connection head (12) with the at least one inlet (88) for the fluid to be treated and / or at least one outlet (18) de s connection head (12) can be connected to the at least one outlet (82) for the fluid to be treated, the head connection part (32) having at least one functional element (44), the at least one functional element (44) having at least one functional element (104 ) of the housing connection part (100) is operatively connectable and has a mounting ramp (43), characterized in that the head connection part (32) is fastened to the connection head (12) with screws (52), the screws (52) with their axis of rotation (51) at a distance from the connection axis (20) on a circular line around the connection axis (20) and in an assembly direction of the screws (52) obliquely to the connection axis (20). Connection head after Claim 9 , characterized in that the screws (52) are each inclined with their axis of rotation (51) relative to a plane tangential to the circular line (35) by an angle (a) in the direction of the connecting axis (20), the angle (a) between 0 ° and 8 °, preferably between 2 ° and 7 °, particularly preferably between 4 ° and 5 °. Connection head after Claim 9 or 10 , characterized in that a projection (51) of the axis of rotation (52) of the respective screw (52) on a plane tangential to the circular line (35) at an angle (β) with respect to a projection (21) of the connecting axis (20) on this The plane is inclined, the angle (β) being between 10 ° and 30 °, preferably between 15 ° and 25 °. Connection head according to one of the Claims 9 to 11 , characterized in that on the head connecting part (32) a flat plateau (59) is arranged as a contact surface for the respective screw head of the screws (52), which has a height offset of at most 300 microns to the surface of the mounting ramp (43), which from Support area (45) facing away, in particular wherein the plateau (59) has a radially outer step (61) which has a greater height offset than a radially inner step (63) of the plateau (59). Connection head according to one of the Claims 9 to 12th , characterized in that the screws (52) are arranged with their axis of rotation (51) perpendicular to the mounting ramp (43) of the functional element (44). Connection head according to one of the Claims 9 to 13th , characterized in that the screws (52) are each arranged centrally on the mounting ramp (43) and / or are screwed into threaded elements (39) arranged on the connection head (12) from the side facing the treatment unit (14). Connection head according to one of the Claims 9 to 14th , characterized in that the at least one functional element (44) each has at least one locking element (46), in particular a locking projection or a locking section or a recess, at least one locking device. Connection head according to one of the Claims 9 to 15th , characterized in that the head connecting part (32) is made of sheet metal or has sheet metal, and / or that the head connecting part (32) is annular.

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