DE102019135091B4 - Treatment device for the treatment of liquid fluids in particular and connection head of a treatment device - Google Patents

Abstract

Treatment device (10), in particular filter device, for a fluid, in particular for a liquid fluid, with a replaceable treatment unit (14), which has a housing (56) with a housing pot (58), a housing cover (60), and 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) which has at least one inlet (16) for the fluid to be treated, which is connected to the at least one inlet (88). is, and/or has at least one outlet (18) for the treated fluid, which is connected to the at least one outlet (82), the connection head (12) and the treatment unit (14) being connected by means of a detachable bayonet-like connecting device (34). are connected to one another by executing a plugging/rotating movement about a connecting axis (20) of the treatment device (10) and characterized in that the connecting device (34) has at least one housing connecting part (100) on the side of the housing (56) and at least one annular head -Connecting part (32) made of sheet metal on the side of the connection head (12), which act together 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 are operatively connected to one another, a central nut (48) which can be screwed to a connecting piece (24) of the connection head (12) is provided and which attaches the head connecting part (32). Connection head (12) clamped.

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 a replaceable treatment unit. The invention further relates to a connection head for a treatment device.

State of the art

Out of DE 10 2013 011 619 A1 , US 2008 0 237 113 A1 and WO 2011/056 857 A1 Various filters are known. From the WO 2015091665 A1 a filter is known for filtering in particular liquid fluids, in particular fuel or oil, in particular an internal combustion engine, with a filter pot 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 pot are connected to one another by means of a detachable bayonet-like plug/swivel connection. The plug/swivel connection has at least two cooperating locking components, one of which is connected to the filter pot 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 replaced in a simple and space-saving manner.

Another task 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 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, and at least one inlet for the fluid to be treated and at least one outlet for the treated fluid, and with a connection head which has at least one inlet for the fluid to be treated, which is 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 connected, wherein the connection head and the treatment unit are connected to one another by means of a detachable bayonet-like connecting device while executing a plugging/rotating movement about a connecting axis of the treatment device and the connecting device has at least one housing connecting part on the side of the housing and at least one annular head Connecting part made of sheet metal on the side of the connection head, which are operatively connected to one another to establish a connection of the connecting device, the housing connecting part and the head connecting part each having at least one mutually complementary functional element in the circumferential direction around the connecting axis, which can be operatively connected to one another. A central nut that can be screwed to a connecting piece of the connection head is provided and clamps the head connecting part on the connection head.

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 one outlet for the treated fluid. The treatment unit can be connected to a connection head of the treatment device by means of a releasable bayonet-like connecting device by executing a plugging/rotating movement about a connecting axis of a treatment device, and the connecting device has at least one housing connecting part on the side of the housing, which is used to connect the connecting device to at least one Head connecting part is formed on the side of the connection head, wherein the at least one inlet can be connected to 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. The at least one housing connecting part has at least one functional element that can be operatively connected to at least one complementary functional element of the head connecting part. According to the invention, the annular head connecting part (32) is made of sheet metal.

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 detachable bayonet-like connecting device by performing a plugging/rotating movement about a connection axis of the treatment device and the connecting device has at least one annular head connecting part made of sheet metal on the side of the connection head, which is designed to connect the connecting device to at least one housing connecting part on the side of the housing, wherein at least one inlet of the connection head with the at least one inlet for the thing to be treated Fluid and/or at least one outlet of the connection head can be connected to the at least one outlet for the treating fluid. The at least one head connecting part in the circumferential direction around the connecting axis has at least one functional element that can be operatively connected to at least one complementary functional element of the housing connecting part. A central nut that can be screwed to a connecting piece of the connection head is provided and clamps the head connecting part on the connection head.

Favorable refinements and advantages of the invention result 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, with an exchangeable treatment unit is proposed, 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 which has at least one inlet for the fluid to be treated, which is 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. The connection head and the treatment unit are connected to one another by means of a detachable bayonet-like connection device, executing a plugging/rotating movement about a connection axis of the treatment device. The connecting device has at least one housing connecting part on the side of the housing and at least one annular head connecting part made of sheet metal on the side of the connection head, which are operatively connected to one another in order to establish a connection of the connecting 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 are operatively connected to one another.

According to the invention, a central nut that can be screwed to a connecting piece of the connection head is provided and clamps the head connecting part on the connection head.

The central nut can advantageously surround the connecting piece radially on the outside. The central nut can serve to clamp the head connecting part, which can be designed as a sheet metal part, against the connection head. To connect to the connecting piece, the central nut can have an internal thread, while the connecting piece has an external thread on its radial outside. To secure the central nut on the connecting piece, gluing or corrugation can be provided in the connecting piece or on the central nut. In both versions of the central nut, the connecting piece surrounds the raw-side inlet channel.

According to a favorable embodiment of the treatment device, the central nut can have radially extending incisions on a ring body as an assembly aid. This allows the central nut to be easily tightened onto the connecting piece when installing the connection head. It is also possible to loosen the central nut from the connecting piece without much effort.

According to a favorable design of the treatment device, the connecting piece can surround an inlet space on the raw side. In this way, the connecting device can be arranged outside the raw-side inlet space and therefore without the risk of possible contamination of the connecting elements. This makes it possible to easily assemble and disassemble the treatment unit, for example for maintenance purposes.

According to a favorable embodiment of the treatment device, the connecting piece can have an external thread for fastening the central nut. The central nut, which has an internal thread, can easily be screwed onto the connecting piece and then loosened again, for example to remove the head connecting element.

According to a favorable embodiment of the treatment device, functional elements can be provided on the circumference of the annular body of the central nut. In this way, the head connecting part can be advantageously integrated into the central nut, so that both functions are integrated in one component.

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

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

Advantageously, at least one of the mutually complementary functional elements has a mounting ramp which merges into a support area that is vertical with respect to the connecting axis, while the other of the mutually complementary functional elements has a sliding area, which is followed by a vertical support area with respect to the connecting 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.

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

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

Advantageously, the at least one functional element and the corresponding functional element that interacts with it are designed to be complementary. In this way, they can lie flat against each other in the closed position of the connecting device. In this way, power transmission can be improved. The load on the components involved can be further reduced. The components can be smaller in size 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.

An end stop, in particular a locking element, can advantageously be connected to 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 relative to one another.

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 lock, which locks one behind the other, with one another or into one another in the closed position of the at least one connecting device. The locking device can reduce the risk that the connecting device can come loose due to an unwanted rotation of the treatment unit about the connecting axis.

To close and release the at least one latching device, the corresponding latching 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 appropriate locking forces. Such increased effort during attachment can also be easily detected when the treatment unit is in its correct position.

The connecting device can advantageously have at least one prestressing element in order to realize 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 noise can also be reduced. In particular, any rattling can be prevented. Furthermore, any latching force that must be overcome to close or open the latching mechanism can be generated or increased.

The at least one biasing 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 replaced together with the treatment unit. Alternatively or additionally, at least one biasing element can be arranged on the housing. It can can be replaced together with the treatment unit.

The at least one biasing element can advantageously be elastic. The at least one biasing element can be elastic due to its shape and/or its material composition. Advantageously, the at least one prestressing element can comprise or be made of plastic, in particular elastomer. Advantageously, the at least one prestressing element can 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 biasing element can also perform a sealing function. The at least one biasing element can be combined with a seal or sealing unit or vice versa. Additionally or alternatively, the at least one biasing element can be implemented with a backstop membrane of the treatment unit or vice versa. The return stop membrane can advantageously be used to close a passage in the housing for fluid, preferably the at least one inlet, in a flow direction. In this way, the fluid can be prevented from flowing back.

According to a favorable embodiment of the treatment device, the treatment unit, in particular the housing cover and/or an end plate of a possible filter element, and the connection head can each have at least one corresponding element, in particular a connection piece, preferably a connection piece and/or connecting piece and/or sealing piece and/or cylinder piece, have, which correspond in pairs when the treatment unit is mounted. 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 relative to one another with respect to the connecting axis. Alternatively, the corresponding elements can be arranged in pairs in abutment, in particular with the interposition of a sealing device. In this way, radial position tolerances with respect to the connecting axis can be easily compensated for.

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-carrying region, in particular an outlet channel for the fluid, can be realized in the inner pair of correspondence elements.

A second fluid-carrying region, in particular an inlet annular space for the fluid, can advantageously be realized between the inner pair of correspondence elements and the outer pair of correspondence elements.

The correspondence elements, in particular the pairs of correspondence elements, can each be coaxial with the connecting axis. This makes it easier to position them relative to each other. Furthermore, the fluid-carrying areas can be more uniform circumferentially.

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 regions, in particular at least one inlet region and at least one outlet region for the fluid. In this way, the corresponding fluid-carrying areas can be easily delimited from the environment with just a pair of correspondence elements. Here, 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 environment, with only one pair of corresponding 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 a ring seal, preferably an O-ring seal or a combined seal-backflow stop membrane, can be arranged between the corresponding elements of at least one pair. In this way, the fluid-carrying area of the contact area of the connecting piece delimited by the at least one pair of correspondence elements can be better sealed.

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

An outer ring seal of a sealing device can advantageously be arranged radially inside the housing connecting part. In this way, at least one fluid-carrying area of the treatment device can be sealed from the environment with at least one sealing device. Advantageously, the outer ring seal projects beyond the connecting device in the axial direction by a maximum of 5 mm upwards or downwards. This is advantageous in terms of space utilization, 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, several, in particular all, fluid-carrying spaces can be sealed from the outside, in particular from the environment and/or from the connecting parts of the connecting device, with just one seal.

Advantageously, the at least one sealing device, in particular a ring seal or in a ring seal unit, can be arranged as close as possible to the connecting axis, i.e. have the smallest possible diameter. In this way, a force that can be exerted by the at least one sealing device in the axial direction on the connecting device 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 to open or close 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.

Advantageously, the at least one sealing device can have an O-ring or a shaped seal. The sealing device can advantageously have a sealing effect with respect to the connecting axis radially, in particular outwards or inwards. Additionally or alternatively, the at least one sealing device can have a sealing effect in the axial direction.

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

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

Advantageously, at least one sealing device can be arranged on the treatment unit, in particular the housing cover and/or optionally the end plate of the filter element. In this way, the at least one sealing device can be replaced together with the treatment unit.

The at least one head connecting part and/or the at least one housing connecting part can each be realized with a material thickness that is small compared to their radial and circumferential extent with respect to the connecting axis. The material thicknesses of the at least one head connecting part and the at least one housing connecting part can be of similar size.

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

The two connecting parts can be suitably shaped from semi-finished products or molded parts, in particular bent, folded, folded, cut or punched or the like. In this way, the corresponding locking sections can be implemented if necessary.

Advantageously, at least part of the semi-finished product or molded parts can be provided radially within the head connecting parts, which are formed from semi-finished products or molded parts, in particular bent, folded, folded, cut or punched or the like. Advantageously, the part of the semi-finished product or the molded parts arranged radially within the head connecting parts is 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 peripheral wall of the housing and/or the connection head. In this way, the bayonet-like connecting device can be protected from the environment. The connection device can advantageously be in one speaking connection space between the housing and the connection head.

Advantageously, the at least one functional element can rest on the corresponding complementary support area over the largest possible extent, preferably its entire extent, in the circumferential direction and in the radial direction with respect to the connecting axis. In this way, force transmission between the connecting parts can be improved. Corresponding 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 connecting part and/or the at least one housing connecting part can be constant in the circumferential direction at least in the area of the support areas. In this way, the particular 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 connecting axis. In this way, when the treatment unit is rotated in the closing direction of rotation, the housing connecting part can simultaneously be pulled in the axial direction towards the connection head by means of the connecting parts. In this way, a combined plugging/rotating movement can be realized. The slopes of the at least one support area and the at least one complementary support area can advantageously be identical.

In this way, any prestressing 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.

Advantageously, the pitches can correspond to the pitch of a usual right-hand thread. In this way, the connecting device can be closed in the clockwise direction and opened in the opposite direction by rotating the treatment unit, as is particularly common with fuel filters or oil filters.

Advantageously, a height axial to the connecting axis, which is covered when closing the bayonet-like connecting device, can correspond to an axial distance of any seal on the side of one of the connecting parts from a corresponding sealing surface on the side of the other connecting part. In this way, the corresponding seal can be positioned on the corresponding sealing surface when the connecting device is closed by means of the plug/rotary connection.

Advantageously, at least one of the connecting parts can be firmly or detachably connected to the treatment unit. At least one of the connecting parts can be permanently or detachably connected to the connection head. The at least one connecting part can be connected to the treatment unit or the connection head by means of a cohesive and/or non-positive and/or positive connection, in particular by means of a flanged connection, a welded connection, a clamp connection, a snap connection, a plug connection, a screw connection and/or an adhesive connection be.

Advantageously, the head connecting part can preferably be screwed or welded to the connection head. By using a screw connection, the head connecting part can be easily 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 excess pressure prevailing in the housing, particularly 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 made more simply, in particular from simpler materials.

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

Advantageously, the treatment device can 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 the treatment device, in particular filter device, is described, 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. The treatment unit can be connected to a connection head of the treatment device by means of a detachable bayonet-like connecting device by performing a plugging/rotating movement about a connecting axis of a treatment device. Furthermore, the connecting device has at least one housing connecting part on the side of the housing, which is designed to connect the connecting device with at least one head connecting part on the side of the connection head, 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 treating fluid.

The at least one housing connecting part has at least one functional element that can be operatively 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 connecting part is provided which has at least one functional element, wherein the at least one functional element can be operatively connected to at least one functional element of the housing connecting part.

According to the invention, a central nut that can be screwed to a connecting piece of the connection head is provided, which clamps the head connecting part on the connecting head or is formed in one piece with the head connecting part.

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

According to a favorable design of the connection head, the central nut can have radially extending incisions on an annular body as an assembly aid. This allows the central nut to be easily tightened onto the connecting piece when installing the connection head. It is also possible to loosen the central nut from the connecting piece without much effort.

According to a favorable design of the connection head, the connection piece can surround an inlet space on the raw side. In this way, the connecting device can be arranged outside the raw-side inlet space and therefore without the risk of possible contamination of the connecting elements. This makes it possible to easily assemble and disassemble the treatment unit, for example for maintenance purposes.

According to a favorable design of the connection head, the connection piece can have an external thread for fastening the central nut. The central nut, which has an internal thread, can easily be screwed onto the connecting piece and then loosened again, for example to remove the head connecting element.

According to a favorable design of the connection head, functional elements can be provided on the circumference of the annular body of the central nut. In this way, the head connection unit can be advantageously integrated into the central nut, so that both functions are integrated in one component.

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

According to a favorable design of the connection head, the head connecting part can be annular. With a ring-shaped arrangement, a bayonet-like connection can be used 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.

According to a favorable embodiment of the treatment unit and/or the connection head, the at least one functional element can have a mounting ramp which merges into the vertical support area with respect to the connecting axis. Alternatively, the at least one functional element can have a sliding area that merges into the support area that is perpendicular to the connecting axis.

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

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

Conveniently, the head connecting part can 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 treatment unit, the housing connecting part has sheet metal. In particular, the material thickness of the housing connecting part can be constant at least in the area of the at least one functional element. Accordingly, the head connecting part of the connection head can be designed analogously.

At least one head connecting part can advantageously be provided which has at least one functional element, wherein the at least one functional element can be operatively connected to at least one functional element of the housing connecting part and wherein the at least one functional element has a vertical support area with respect to the connecting axis, in particular that the at least one functional element has a mounting ramp which merges into the support area which is perpendicular to the connecting axis.

According to a favorable embodiment of the treatment unit and/or 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 lock.

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

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

Advantageously, the treatment unit can be a spin-on filter, in particular a spin-on oil filter or a spin-on fuel filter. The housing of the treatment unit can then be a filter housing. Advantageously, at least one filter element can 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 replaced together with the filter housing. As a rule, the at least one filter element is permanently arranged in the filter housing. Accordingly, the connections between the housing pot and the housing cover do not have to be removable without being destroyed.

The invention is not limited to a treatment device for 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 fluid treatment devices within or outside of motor vehicle technology. The invention Can also be used with air deoil boxes or desiccant boxes.

Brief description of the drawings

• 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 als Längsschnitt eine Detailansicht der Behandlungsvorrichtung nach 1 im Bereich Anschlusskopf-Behandlungseinheit;
• 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 in einer Ansicht von der Montageseite;
• 7 eine weitere isometrische Darstellung des Kopf-Verbindungsteils nach 5 in einer Ansicht von der Seite;
• 8 eine isometrische Darstellung der Zentralmutter nach 5;
• 9 eine isometrische Darstellung einer Zentralmutter mit integrierten Funktionselementen nach einem nicht erfindungsgemäßen Ausführungsbeispiel;
• 10 eine isometrische Darstellung des Gehäuse-Verbindungsteils nach 2;
• 11 eine isometrische Darstellung einer alternativen Ausgestaltung eines Kopf-Verbindungsteils mit geraden Anlagebereichen in einer Ansicht schräg von oben; und
• 12 eine isometrische Darstellung eines zum Kopfverbindungsteil nach 11 komplementären Gehäuse-Verbindungsteils.

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

• 1 an isometric representation of a treatment device according to an embodiment of the invention, in particular a filter device for engine oil of an internal combustion engine of a motor vehicle, with a treatment unit and a connection head;
• 2 an isometric representation of the treatment unit 1 with top view of the housing connecting part;
• 3 a longitudinal section of the treatment device 1 ;
• 4 as a longitudinal section a detailed view of the treatment device 1 in the connection head treatment unit area;
• 5 an isometric representation of the connection head of the treatment device 1 looking at the head connection part inside the connection head;
• 6 an isometric representation of the head connecting part 5 in a view from the assembly side;
• 7 another isometric representation of the head connecting part 5 in a side view;
• 8th an isometric representation of the central nut 5 ;
• 9 an isometric representation of a central nut with integrated functional elements according to an embodiment not according to the invention;
• 10 an isometric representation of the housing connecting part 2 ;
• 11 an isometric representation of an alternative embodiment of a head connecting part with straight contact areas in a view obliquely from above; and
• 12 an isometric representation of a head connecting part 11 complementary housing connecting part.

Embodiment(s) of the invention

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

In the 1 to 4 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 are 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 14 and a connection head 12. 2 shows an isometric representation of the treatment unit 14 with a top view of a housing connecting part 100, which has four functional elements 104 in this exemplary embodiment. 3 shows a longitudinal section of the treatment device 14. 4 shows a longitudinal section of a detailed view of the treatment device 14 in the area of the connection head 12 and housing 56.

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

The connection head 12 also has a radially inner connection piece 22 that is coaxial with respect to a connection axis 20.

If “axial”, “radial”, “coaxial”, “circumferential” or the like is mentioned below, this refers to the connecting axis 20, unless otherwise stated. In the exemplary embodiment shown, the connecting axis 20 coincides with a filter axis the treatment unit 14 together.

The inner connecting piece 22 is approximately circular cylindrical. It extends on the side of the connection head 12 which faces the treatment unit 14. It is open on both ends. On its side facing away from the treatment unit 14, the inner connecting piece 22 is fluidly connected to the drain 18.

The inner connecting piece 22 is coaxially surrounded by a circular cylindrical, radially outer connecting piece 24. The inner connecting piece 22 projects beyond the outer connecting piece 24 in the axial direction on the side facing the treatment unit 14.

The inner connecting piece 22 and the outer connecting piece 24 each delimit a coaxial inlet annular space 26 on the circumference. The inlet annular space 26 is connected to the inlet 16 via a fluid connection.

The inner connecting piece 22 and the outer connecting piece 24 are coaxially surrounded by a circular cylindrical peripheral wall 28. The free edge of the peripheral wall 28 facing the treatment unit 14 is located at approximately the same axial height as the free edge of the outer connecting piece 24. The connecting piece 24 projects slightly beyond the peripheral wall 28 in the direction of the treatment unit 14.

5 shows an isometric view of the connection head 12 of the treatment device 10 1 looking at the head connecting part 32 inside the connection head 12. The 6 and 7 show an isometric view of the head connecting part 32 5 . 8th shows an isometric view of a central nut 48, while in 9 a further embodiment of a central nut 48 with functional elements 44 is shown. 10 shows an isometric view of a housing connecting part 100.

In the design of the connection head 12 according to 5 the peripheral wall 28 forms a radially outer boundary of an axially outer part of the connection head 12 on the side facing away from the treatment unit 14. A splash guard part 150 is arranged partially covered by the peripheral wall 28. The splash guard part 150 is made, for example, from vulcanized elastomer or thermoplastic elastomer (TPE). The splash guard part 150 and the outer connecting piece 24 each delimit an annular coaxial connection space 30 on the circumference.

A head connecting part 32 of a detachable bayonet-like connecting device 34 is arranged in the connecting space 30. The treatment unit 14 is detachably attached to the connection head 12 using the connecting device 34. For this purpose, a complementary housing connecting part 100 is arranged in the treatment unit 14.

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

Radially inside, the head connecting part 32 has an annular head mounting section 36. The head mounting section 36 abuts with its radially inner peripheral side approximately the radially outer peripheral side of the outer connecting piece 24. The head mounting section 36 extends approximately in a plane radially and circumferentially. The head connecting part 32 extends radially approximately to the middle of the connecting space 30.

In this example, the head mounting section 36 merges into four head-side functional elements 44 in the form of bayonet sections, as in the detailed illustration in 8th is recognizable. Instead of four functional elements 44, three or five can also be provided.

The head-side functional elements 44 are identical in shape and size. The head-side functional elements 44 are arranged evenly distributed around the circumference. The head-side functional elements 44 each have a circumferential section which extends essentially circumferentially parallel to an imaginary circular cylinder jacket around the connecting axis 20. The peripheral section has a relatively short support area 45, which is arranged perpendicular to the connecting axis 20. The respective functional element 44 has an axially oblique mounting ramp 43, which merges into the relatively short support area 45, which ends with a locking element 46 as an end stop 47, which is followed by a return to the adjacent head mounting section 36.

The peripheral sections therefore connect the head mounting sections 36 with the respective mounting ramps 43. The mounting ramps 43 are in particular in the 5 to 7 clearly visible.

That in the 6 and 7 Head connecting element 32 shown has an annular shape, which has a flat support surface 33 on an inside facing away from the connection head 12. The in. lies on this support surface 33 8th illustrated central nut 48 with its corresponding support surface 35 when head connecting element 32 and central nut 48 are mounted on the connecting piece 24 of the connecting head 12. The ring body 37 of the central nut 48 has an internal thread 39 on its radial inside, by means of which the central nut 48 is screwed onto an external thread 25 of the connecting piece 24. The ring body 37 of the central nut 48 has further radially extending incisions 51, which serve as an attachment for a corresponding tool as an assembly aid.

The connecting piece 24 surrounds the raw-side inlet space 26, which extends radially on the inside through the inner connecting piece 22 is limited, through which the cleaned fluid is removed.

The mounting ramps 43 each have an approximately helical course around the connecting axis 20. The pitch of the oblique mounting ramps 43 corresponds approximately to the pitch of a usual right-hand thread. Viewed axially from the treatment unit 14, the clockwise front free ends of the mounting ramps 43 are each closer to the treatment unit 14 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 a gap through which corresponding, complementary housing-side functional elements 104 in the form of bayonet sections, explained in more detail below, can be inserted.

The sheet metal of the head connecting part 32 is of the same thickness in the head mounting section 36 and in the mounting ramps 43. This also means that it has a uniform axial extent in the head mounting section 36 and in the mounting ramps 43.

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

The treatment unit 14 is detachably attached to the connection head 12 using the connecting device 34. For this purpose, a complementary housing connecting part 100, which has complementary functional elements 104, is arranged in the treatment unit 14. 10 shows an isometric view of the housing connecting part 100 2-4 , which cooperates with the head connecting part 32.

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

The housing connecting part 100 extends radially from the radially outer peripheral side of the housing cover 60 ( 4 ) to above the radial center of the connecting space 30. The housing connecting part 100 overlaps the head connecting part 32.

The housing connecting part 100 has a housing mounting section 102, which extends radially and circumferentially in approximately one plane. The housing mounting section 102 is fixed radially on the 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. It lies flat on one side of the housing cover 60.

The housing mounting section 102 merges on its radially inner side into four identical housing-side functional elements 104 in the form of bayonet sections. The functional elements 104 on the housing side are arranged evenly distributed around the circumference. They have approximately 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 housing-side functional elements 104 act complementary to the functional elements 44 and each include a mounting ramp 103, an adjoining 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 establishing the connection between the head connecting part 32 and the housing connecting part 100, the sliding areas 142 slides on the mounting ramps 43 of the housing-side head connecting part 32.

The respective support area 105 has a contact surface 108 which is in 9 is arranged on the invisible side of the support areas 105 and which rest against the straight support areas 45 of the functional elements 44 when the connection to the head connecting part 32 is established.

The contact surfaces 108 are located on the side of the respective housing-side functional element 104 facing the housing cover 60. When the connecting device 34 is closed, the contact surfaces 108 are each engaged behind by one of the head-side functional elements 44 for interaction. The contact surfaces 108 each rest on the corresponding areas of the functional elements 44.

The functional elements 104 on the housing side each have a locking projection 110 on the housing side. The locking projections 110 rise axially away from the housing cover 60. When the treatment unit 14 is mounted, the housing-side locking projections 110 lock behind the corresponding head-side locking projections 46.

To mount the treatment unit 14 with the housing cover 60 in front, it is inserted coaxially onto the connection side of the connection head 12.

A prestressing element (not shown) can also be arranged coaxially in the connecting space 30. In the connection head 12, the prestressing element is placed in a groove with slight play and secured by the screwed-on head connecting part 32. This also holds the open spring ends of the biasing element.

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

The splash protection part 150 serves to protect the functional elements 44, 104 from splash water and dust. The splash guard part 150 is formed from a vulcanized elastomer or a thermoplastic elastomer (TPE) and preferably seals radially against the connection head 12 and preferably axially against the edge 57 of the treatment unit 14.

The treatment unit 14 is designed as a spin-on filter with a round cross section. It is essentially coaxial with the connection axis 20. The treatment unit 14 has a housing 56 with a housing pot 58, in the open side of which a housing cover 60 is fastened 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 protection part 150 of the connection head 12. The housing pot 58 has an outwardly curved housing base 62. The housing cover 60 and the housing pot 58 are made of metal. Optionally, the housing cover 60 can also be welded to the housing pot 58.

A coaxial filter element 64 is arranged in the housing pot 58 ( 3-4 ). The filter element 64 has a circumferentially closed filter medium folded into a filter bellows 66. The filter bellows 66 is sealed on its end faces with a connecting end plate 68 in which 1 above, and a counter end disk 70 below. The connection end plate 68 is located on the side of the filter element 64 facing the housing cover 60.

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 end face of the filter element 64 facing the housing base 62. On the outside of the counter end disk 70 facing the housing base 62, a plurality of spring elements 74 are supported, which on the other hand are supported on the housing base 62.

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

The filter element 64 is surrounded radially on the outside by a tube-side annular space 78, which is delimited by the radially inner circumferential side of the housing pot 58.

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

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

An annular coaxial inner sealing unit 84 is attached to the side of the cylinder socket 83 that is axially remote from the element interior 72. The inner seal unit 84 consists of an elastomer.

The inner sealing unit 84 has a non-return membrane 86 on the radial outside. The non-return membrane 86 is annular and surrounds the cylinder neck 83 radially on the outside. The return stop membrane 86 rests under a mechanical prestress on the inside of the housing cover 60 facing the filter bellows 66. It closes, like in the 3 shown, in the pressure-free state, a coaxial annular inlet opening 88 of the housing cover 60 for engine oil. As soon as engine oil is supplied to the treatment device 10, the backstop membrane 86 opens in the flow direction due to the oil pressure. A return of the engine oil through the inlet opening 88 is prevented by the return stop membrane 86.

A radially inner ring section of the inner sealing unit 84 forms a coaxial inner ring seal 90. The inner ring seal 90 lies with its radially outer peripheral side tightly against the radially inner peripheral side of the cylinder sleeve 83. The inner ring seal 90 lies radially inside When the treatment unit 14 is mounted, the circumferential side is close to a radially outer circumferential side of the radially inner connecting piece 22, which is designed as a sealing surface. With the inner ring seal 90, the clean side of the treatment unit s 14 is separated from its raw side in the area of the inlet opening 88.

The housing cover 60 has a stepped coaxial outer sealing socket 92 in the area of the inlet opening 88. A constriction of the outer sealing socket 92 at its end axially remote from the filter bellows 66 forms an outer sealing groove 94 for an outer ring seal 96. The outer ring seal 96 is designed as an O-ring.

A radially outer diameter of the outer sealing socket 92 outside the area of the sealing groove 94 corresponds approximately to the radially inner diameter of the outer connecting socket 24 of the connection head 12. When the treatment unit 14 is mounted, the sealing socket 92 is inserted into the outer connecting socket 24. The radially outer circumferential side of the outer sealing socket 92 then rests on the radially inner circumferential side of the radially outer connecting piece 24.

The outer sealing groove 94 is covered with a cover ring 98 on its side axially facing away from the filter bellows 66. The cover ring 98 is connected to the outer sealing socket 92 by means of clamping tabs.

When the treatment unit 14 is mounted, the outer ring seal 96 lies tightly against the radially inner circumferential side of the radially outer connecting piece 24, which is designed as a sealing surface. The outer ring seal 96 thus separates the oil-carrying area of the treatment device 10 from the connecting space 30 and from the environment.

At the latest when the cover ring 98 arrives at the end face of the radially outer connecting piece 24 of the connecting head 12 and/or the housing connecting part 100 arrives at the head connecting part 32, the treatment unit 14 is additionally rotated in the clockwise direction, which is the closing direction of the connecting device 34 Connecting axis 20 rotated.

As soon as the free ends of the housing-side functional elements 104 are positioned in the area of the corresponding head-side insertion gaps, the guidance of the respective housing-side sliding areas 142 begins on the respective assembly ramps 43 of the functional elements 44. Due to the axial tension achieved with the incline of the assembly ramps 43 and the sliding areas 142 In the direction between the functional elements 44 and 104, the inner ring seal 90 is pulled onto the radially inner connecting piece 22 and the outer ring seal 96 is pulled into the radially outer connecting piece 24.

As soon as the housing-side locking projections 110 abut the corresponding head-side locking projections 46, a corresponding locking force must be overcome in order to continue rotating. The latching force is also realized by the restoring force of the spring arms of the leaf spring 54.

After overcoming the locking force, the housing-side locking projections 110 lock behind the housing-side locking projections 46 and thus secure the connecting device 34 against unintentional opening.

To separate the treatment unit 14 from the connection head 12, the treatment unit 14 is rotated counterclockwise, i.e. in the opening direction, about the connecting axis 20. To do this, the locking force of the housing-side locking projections 110 must first be overcome with the head-side locking projections 46.

The inner support areas 105 are guided along the corresponding support areas 45 of the head-side functional elements 44. Furthermore, the outer housing-side support areas 105 are guided along respective guide pins. The guide pins each generate an axial pressing force on the outer housing-side support areas 105, which act against a respective holding force of the inner ring seal 90 and the outer ring seal 96. The holding forces are realized by the respective friction between the inner ring seal 90 and the inner connecting piece 22 and between the outer ring seal 96 and the outer connecting piece 24. By means of the pressing force, the inner ring seal 90 is pulled off from the inner connecting piece 22 in the axial direction and the outer ring seal 96 is pulled out of the outer connecting piece 24.

As soon as the housing-side functional elements 104 leave the corresponding head-side insertion gaps after further rotation, the treatment unit 14 is pulled off the connection head 12 with an axial movement.

When operating the treatment device 10, i.e. when operating the internal combustion engine, engine oil to be cleaned flows through the inlet 16 into the inlet annular space 26. From there, the engine oil flows through the inlet opening 88, being released by the non-return membrane 86, into the raw-side annular space 78 of the filter housing 56. The engine oil to be cleaned flows through the filter bellows 66 radially outward to radially inward and reaches the element interior 72 through the openings of the center tube 88. From the element interior 72, the cleaned engine oil passes through the outlet opening 82 and the radially inner connecting piece 22 of the connection head 12 to the drain 18. The cleaned engine oil leaves the connection head 12 and thus the treatment device 10 through the process 18. The flow direction 112 is indicated by arrows.

9 shows an embodiment of a central nut 48 not according to the invention, in which functional elements 44 are arranged on a radial outer circumference of the ring body 37. The central nut 48 thus represents an integral, one-piece component consisting of the head connecting element 32 and the central nut 48. The central nut 48 again has an internal thread 39 on its inside, by means of which the central nut 48 can be screwed onto the connecting piece 24 of the connecting head 12. This means that the assembly of the connection head 12 can be significantly simplified.

Such a central nut 48 can be manufactured inexpensively as a solid formed part.

The 11 and 12 show an alternative embodiment of a head connecting part 32 and a complementary housing connecting part 100.

Radially inside, the head connecting part 32 has an annular head mounting section 36. The head mounting section 36 abuts with its radially inner peripheral side approximately the radially outer peripheral side of the outer connecting piece 24 of the connecting head 12, not shown ( 5 ). The head mounting section 36 extends approximately in one plane radially and circumferentially.

In this example, the head mounting section 36 merges into three head-side functional elements 44 in the form of bayonet sections, as in the detailed illustration in 11 is recognizable. Instead of three functional elements 44, four or five can also be provided.

The head-side functional elements 44 are identical in shape and size. The head-side functional elements 44 are arranged evenly distributed around the circumference. The head-side functional elements 44 each have a circumferential section which is essentially circumferentially parallel to an imaginary circular cylinder jacket around the connecting axis 20 ( 4 ) extends. The peripheral section has a flat support area 45, which is arranged perpendicular to the connecting axis 20. The respective functional element 44 has an axially oblique mounting ramp 43, which merges into the support area 45 arranged perpendicular to the connecting axis, which ends with a locking element 46 as an end stop 47, which is followed by a return to the adjacent head mounting section 36.

The peripheral sections therefore connect the head mounting sections 36 with the respective mounting ramps 43.

That in the 11 Head connecting element 32 shown has an annular shape, which has a flat support surface 33 on an inside facing away from the connection head 12, which in this exemplary embodiment corresponds to the underside of the head mounting section 36, which is not visible in the figure. The in. lies on this support surface 33 8th illustrated central nut 48 with its corresponding support surface 35 when head connecting element 32 and central nut 48 are mounted on the connecting piece 24 of the connecting head 12. The ring body 37 of the central nut 48 has an internal thread 39 on its radial inside, by means of which the central nut 48 is screwed onto an external thread 25 of the connecting piece 24. The ring body 37 of the central nut 48 has further radially extending incisions 51, which serve as an attachment for a corresponding tool as an assembly aid.

Here too, the central nut 48 can be connected to the head connecting part 32 as in the exemplary embodiment 9 be integrated (not shown) in that the functional elements 44 are formed on the radially outer circumference of the central nut 48.

The complementary housing connecting part 100 according to 12 also has a flat contact area 105 for the support area 45 in the functional elements 104 of the head connecting part 32.

The housing-side functional elements 104 act complementary to the functional elements 44 and each include a mounting ramp 103, an adjoining 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 establishing the connection between the head connecting part 32 and the housing connecting part 100, the sliding areas 142 slides on the mounting ramps 43 of the housing-side head connecting part 32.

The respective support area 105 has a contact surface 108 which is in 9 at the out of sight bar side of the support areas 105 is arranged and which rest against the straight support areas 45 of the functional elements 44 when the connection to the head connecting part 32 is established.

Claims (11)

Treatment device (10), in particular filter device, for a fluid, in particular for a liquid fluid, with a replaceable treatment unit (14), which has a housing (56) with a housing pot (58), a housing cover (60), and 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) which has at least one inlet (16) for the fluid to be treated, which is connected to the at least one inlet (88). is, and/or has at least one outlet (18) for the treated fluid, which is connected to the at least one outlet (82), the connection head (12) and the treatment unit (14) being connected by means of a detachable bayonet-like connecting device (34). are connected to one another by executing a plugging/rotating movement about a connecting axis (20) of the treatment device (10) and characterized in that the connecting device (34) has at least one housing connecting part (100) on the side of the housing (56) and at least one annular formed head connecting part (32) made of sheet metal on the side of the connection head (12), which act together to establish a connection of the connecting device (34), the housing connecting part (100) and the head connecting part (32) in the circumferential direction the connecting axis (20) each has at least one mutually complementary functional element (44, 104), which are operatively connected to one another, a central nut (48) which can be screwed to a connecting piece (24) of the connection head (12) is provided, which forms the head connecting part (32 ) clamped on the connection head (12). Treatment device after Claim 1 , characterized in that the central nut (48) has radially extending incisions (51) on an annular body (37) as an assembly aid. Treatment device after Claim 1 or 2 , characterized in that the connecting piece (24) surrounds an inlet space (26) on the raw side. Treatment device according to one of the preceding claims, characterized in that the connecting piece (24) has an external thread (25) for fastening the central nut (48). Treatment device according to one of the Claims 1 until 4 , characterized in that the housing connecting part (100) is made of sheet metal or has sheet metal. 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 latching element (46, 106), in particular a latching projection or a latching section or a recess, at least one latching lock, which in the closed position of the at least a connecting device (34) one behind the other, with one another or locked into 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 a possible filter element (64), and the connection head (12) each have at least one corresponding element, in particular a connection piece, preferably a connecting piece (22, 24) and/or connecting piece and/or sealing piece (92) and/or cylinder piece (83), which correspond in pairs when the treatment unit (14) is mounted, in particular wherein at least one pair of corresponding elements ( 22, 83) is arranged within at least one other pair of correspondence elements (24, 92). Connection head (12) for a treatment device (10) according to one of Claims 1 until 7 , for connection to a 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, characterized in that the connection head (12) of the treatment device (10) can be connected to the treatment unit (14) by means of a detachable bayonet-like connecting device (34) by executing a plugging/rotating movement about a connecting axis (20) of the treatment device (10). and the connecting device (34) has at least one annular head connecting part (32) made of sheet metal on the side of the connection head (12), which is used to connect the connecting device (34) to at least one housing connecting part (100) on the side of the housing ( 56), 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) of the connection head (12) with the at least one outlet (82) for the treating fluid can be connected, the head connecting part (32) having at least one functional element (44) in the circumferential direction around the connecting axis (20), which is connected to a complementary functional element (104) of the housing connecting part ( 100) can be operatively connected, wherein a central nut (48) which can be screwed to a connecting piece (24) of the connection head (12) is provided for clamping the head connecting part (32) on the connection head (12). Connection head Claim 8 , characterized in that the central nut (48) has radially extending incisions (51) on an annular body (37) as an assembly aid. Connection head Claim 8 or 9 , characterized in that the connecting piece (24) surrounds an inlet space (26) on the raw side. Connection head according to one of the Claims 8 until 10 , characterized in that the at least one functional element (44) each has at least one latching element (46), in particular a latching projection or a latching section or a recess, at least one latching lock.

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