CN112805077A

CN112805077A - Plastic component for connection to a filter element and filter device for filtering a fluid

Info

Publication number: CN112805077A
Application number: CN201980065581.8A
Authority: CN
Inventors: 沃尔夫冈·施塔斯伯格
Original assignee: IBS Filtran GmbH
Current assignee: IBS Filtran GmbH
Priority date: 2018-10-05
Filing date: 2019-10-02
Publication date: 2021-05-14
Also published as: MX2021003844A; WO2020070215A1; DE102018124624A1; DE102018124624B4

Abstract

The invention relates to a plastic component (110, 170) for connecting to a filter element (160), wherein the plastic component (110, 170) has at least one contact surface (120, 181, 182) which surrounds a through-opening (104) of the plastic component (110, 170) and can be brought into contact with the filter element (160), wherein the plastic component (110, 170) is characterized in that: -said at least one abutment surface (120, 181, 182) has at least one circumferential projection (121, 122) which can be connected to the filter element (160); -the protrusion (121, 122) has a first side (121_1, 122_1) and a second side (121_2, 122_ 2); -said first side (121_1, 122_1) and said second side (121_2, 122_2) are at an angle (124) of at least 90 ° to each other.

Description

Plastic component for connection to a filter element and filter device for filtering a fluid

The invention relates to a plastic component for connection to a filter element. The invention also relates to a filter device for filtering a fluid.

For filtering the oil in engines and transmissions, a filter device is used, which may be part of a suction filter or part of a pressure filter. In the case of suction filters, a pump is arranged at the filter outlet of the filter device, wherein the pump sucks the oil to be filtered through the filter element or through the filter medium by means of a negative pressure. Usually, a suction filter (which may also be referred to as a suction filter device) is arranged directly in the oil sump of the oil sump, with all the oil to be filtered flowing through the suction filter device. The associated filter housing of the filter device usually has an upper shell and a lower shell, wherein the filter element or the filter medium is clamped between the upper shell and the lower shell.

In order to connect the filter element to the filter housing of the filter device, the filter element can be connected to the filter housing by ultrasonic welding. For this purpose, sonotrodes are used, in which the filter element is positioned between the sonotrode and a region of the filter housing, and the filter element is connected or welded to the filter housing by means of the introduction of energy by means of the sonotrode. The filter housing is designed as a plastic component and is connected to the filter element.

During this connection, the filter element may be damaged, so that uncleaned oil may pass from the dirty side to the clean side of the filter device, rendering the filter device substantially ineffective.

The object of the invention is to provide an improved plastic component for connection to a filter element, and an improved filter device for filtering a fluid.

The solution of the invention to achieve the object described above is a plastic component having the features of claim 1. An advantageous configuration of the plastic part is described in the claims dependent on claim 1.

More precisely, the solution of the invention for achieving the above object is a plastic component for connection with a filter element, wherein the plastic component has at least one abutment surface which surrounds a through-opening of the plastic component and can be brought into contact with the filter element. The plastic component is characterized in that the at least one contact surface has at least one circumferential projection which can be connected to the filter element, wherein the projection has a first side and a second side, and wherein the first side and the second side are at an angle of at least 90 ° to one another.

The plastic component according to the invention enables a more reliable connection to the filter element, since the connection strength between the filter element and the abutment surface, more precisely between the filter element and the projection of the abutment surface, is increased. Furthermore, the plastic component according to the invention has the following advantages: the filter element is not damaged or is less damaged after the connection with the abutment surface of the plastic component, more precisely after the connection with the projection of the abutment surface, so that the long-term stability of the connection between the plastic component and the filter element is increased.

The projection of the abutment surface is preferably formed integrally with the abutment surface, so that the projection is connected to the abutment surface in a materially bonded manner. More preferably, the projection is an integral part of the abutment surface. More preferably, the abutment surface is an integral part of the plastic member.

The abutment surface surrounds the through hole of the plastic component, so that the protrusion also surrounds the through hole of the plastic component.

The protrusion of the abutting surface may also be referred to as a protrusion rib or a connection rib, or referred to as a connection protrusion, or simply referred to as a rib. In particular, the protrusion may be referred to as an energy director.

The first side of the projection may also be referred to as a first side of the projection or a flank, and the second side of the projection may also be referred to as a second side of the projection or a flank.

The feature that the first side face and the second side face are at an angle of at least 90 ° to each other is to be understood as: the first side surface and the second side surface are at an angle of at least 90 ° to each other in a cross-section through the protrusion. Wherein the cross section through the projection extends transversely and preferably perpendicularly to the longitudinal direction of the projection.

The feature of an included angle of at least 90 ° is to be understood as: a first tangent applied to the first side and a second tangent applied to the second side are always at an angle greater than or equal to 90 ° to each other.

The included angle is preferably between 90 ° and 175 °. The included angle is more preferably between 90 ° and 150 °. The included angle is more preferably between 100 ° and 140 °. More preferably, the included angle is between 110 ° and 130 °.

The plastic component is preferably designed as follows: so that the projection has a rounding by means of which the first side face is connected with the second side face.

The rounding provides a stable transition from the first side to the second side, so that the probability of damage to the filter element is further reduced during the connection of the filter element to the abutment surface, more precisely during the connection to the projection of the abutment surface.

The feature that the first flank is connected to the second flank by a rounding is to be understood as: the first side and the second side each transition into the rounding.

The rounded convex surface faces away from the abutment surface.

The rounding is preferably in the form of a pitch circle. More preferably, the radius of the rounding is between 0.1mm and 1 mm.

Preferably, the plastic component is designed such that the abutment surface has at least two circumferential projections which are connected to the filter element, wherein the second projection is formed around the first projection, wherein the second projection has a first side and a second side, and wherein the first side and the second side are at an angle of at least 90 ° to one another.

A correspondingly designed plastic component has a further increased stability, since the filter element is reliably connected to the plastic component and the connection strength between the filter element and the contact surface, to be precise between the filter element and the two projections (first projection and second projection) of the contact surface, is increased. Furthermore, the plastic component according to the invention has the following advantages: after the connection with the abutment surface of the plastic component, more precisely after the connection with the projection of the abutment surface, the filter element is not damaged or is damaged less, so that the long-term stability of the correspondingly designed plastic component is increased.

The first projection and the second projection of the abutment surface are preferably formed integrally with the abutment surface, so that the first projection and the second projection are connected to the abutment surface in a material-bonded manner. More preferably, the first and second projections are integral parts of the abutment surface. More preferably, the abutment surface is an integral part of the plastic member.

The abutment surface surrounds the through hole of the plastic component, so that the first and second projections also surround the through hole of the plastic component.

The first and second protrusions of the abutting face may also be referred to as first and second protrusion ribs, or as first and second connection protrusions, or simply as first and second rib portions. In particular, the first and second protrusions may be referred to as first and second energy directors.

The respective first sides of the first and second lobes may also be referred to as first sides or flanks of the first and second lobes, and the respective second sides of the first and second lobes may also be referred to as second sides or flanks of the first and second lobes.

The feature that the respective first side faces of the first and second protrusions are at an angle of at least 90 ° to the respective second side faces is to be understood as: in a cross-section through the respective first and second protrusions, the respective first side faces and the respective second side faces are at an angle of at least 90 ° to each other. The respective cross section through the first and second projections extends transversely and preferably perpendicularly to the respective longitudinal direction of the first and second projections.

The plastic part is preferably designed as follows: so that the second projection has a radius by means of which the first side of the second projection is connected to the second side of the second projection.

The rounding of the second projection provides a stable transition from the first side to the second side of the second projection, so that the probability of damage to the filter element during connection of the filter element to the abutment surface, more precisely to the second projection of the abutment surface, is further reduced.

The feature that the first flank of the second projection is connected to the second flank by a rounding is to be understood as: the first and second flanks of the second projection each merge into the rounding.

The rounded convex surface faces away from the abutment surface.

More preferably, the plastic component is designed such that the one or more projections have a base which extends perpendicular to the abutment face and is arranged between the abutment face and the first and second side faces.

The plastic component is preferably designed such that the one or more protrusions are formed from a thermoplastic material.

The thermoplastic material preferably comprises polyamide 6.6. More preferably, the thermoplastic material consists of polyamide 6.6. According to the invention, there is no restriction as to the choice of thermoplastic material.

Furthermore, the plastic component is preferably designed such that the height extension of the one or more projections corresponds to the thickness extension of the filter element.

More preferably, the height extension of the one or more protrusions is at most five times the thickness extension of the filter element. More preferably, the thickness of the filter element extends up to ten times the height extension of the one or more protrusions.

More preferably, the height extension of the filter element is at most five times the thickness extension of the one or more protrusions. More preferably, the thickness extension of the one or more protrusions is at most ten times the height extension of the protrusion or filter element.

More preferably, the plastic component is designed such that the filter element is connected to the one or more projections by means of ultrasonic welding.

A correspondingly designed plastic component has a high stability and reliability, since the use of ultrasonic welding means that the connection of the filter element to the plastic component is very stable and does not damage the filter element during the welding process.

The solution of the invention for achieving the above object is also a filter device having a filter housing comprising at least one inlet for the fluid to enter the housing interior and at least one outlet for the fluid to exit the housing interior. The filter housing has an abutment surface arranged in the housing interior, which surrounds the through-opening of the filter housing. The filter device also has a filter element arranged between the inlet and the outlet and designed to filter the fluid, the filter element being in surrounding contact with the abutment surface such that the fluid conveyed from the inlet to the outlet flows through the filter element. The filter device is characterized in that the filter device comprises at least one of the plastic components mentioned above.

The filter device according to the invention has a higher stability, since the filter element is reliably connected to the filter housing and the connection strength between the filter element and the abutment surface, that is to say between the filter element and the projection of the abutment surface, is increased. The filter device according to the invention is furthermore advantageous in that the filter element is not damaged or is damaged less after connection to the abutment surface of the filter housing, more precisely after connection to the projection of the abutment surface, so that the long-term stability of the filter device according to the invention is increased.

The projection of the abutment surface is preferably formed integrally with the abutment surface, so that the projection is connected to the abutment surface in a materially bonded manner. More preferably, the projection is an integral part of the abutment surface. More preferably, the abutment surface is an integral part of the filter housing.

The abutment surface surrounds the through-hole of the filter housing, so that the projection also surrounds the through-hole of the filter housing.

The fluid is preferably oil. Furthermore, it is of course also possible for the fluid to be filtered to be, for example, water or a gas, in particular breathing air. Therefore, there is no limitation according to the present invention.

The filter device is preferably designed such that the plastic component is part of the filter housing, wherein the abutment face of the plastic component forms the abutment face of the filter housing, and wherein the at least one circumferential projection is connected with the filter element.

The filter device is preferably designed such that the first side of the projection faces the housing interior and the second side of the projection faces away from the housing interior, wherein the first side of the projection and the surface normal of the abutment face are at a first angle to each other and the second side of the projection and the surface normal of the abutment face are at a second angle to each other, wherein the first angle is smaller than the second angle.

A correspondingly designed filter device has a further increased stability. This is because the surface area of the first side to which the filter element is attached is larger than the surface area of the second side to which the filter element is also attached. The connection between the filter element and the projection is thus particularly stable when the fluid to be filtered flows through the filter element, precisely in the region in which the connection between the filter element and the projection is subjected to the greatest forces.

The feature that the first side of the projection faces the housing interior means that the surface normal of the first side has an extension component towards the housing interior.

The surface normal is perpendicular to its corresponding face. Thus, the surface normal of the abutment surface is perpendicular to the abutment surface. The surface normal of the side faces is perpendicular to the side faces.

Since the first angle is smaller than the second angle, the protrusion is asymmetric.

The first angle is preferably between 91 ° and 179 °. More preferably, the first angle is between 100 ° and 150 °. More preferably, the first angle is between 105 ° and 135 °. More preferably, the first angle is between 115 ° and 125 °. The first angle is more preferably 120 °.

The second angle is preferably between 91 ° and 179 °. More preferably, the second angle is between 110 ° and 170 °. More preferably, the second angle is between 135 ° and 165 °. More preferably, the second angle is between 145 ° and 155 °. The second angle is more preferably 150 °.

Wherein the first angle and the second angle are selected such that the angle between the first side surface and the second side surface is always at least 90 °.

The filter device is preferably designed such that the filter housing comprises a plastic component having the features of claim 3, wherein the first side of the second projection faces the housing interior and the second side of the second projection faces away from the housing interior, wherein the first side of the second projection and the surface normal of the abutment face mutually form a first angle, and wherein the second side of the second projection and the surface normal of the abutment face mutually form a second angle, wherein the first angle is smaller than the second angle.

A correspondingly designed filter device has a further increased stability. This is because the surface area of the first side of the second protrusion, which is connected to the filter element, is larger than the surface area of the second side of the second protrusion, which is also connected to the filter element. The connection between the filter element and the second projection is thus particularly stable when the fluid to be filtered flows through the filter element, precisely in the region in which the connection between the filter element and the second projection is subjected to the greatest forces.

The feature that the first side of the second projection faces the housing interior means that the surface normal of the first side has an extension component towards the housing interior.

The second protrusion is asymmetrical because the first angle is less than the second angle.

The filter device is preferably designed such that the filter housing has a first housing part and a second housing part connected thereto, wherein the abutment surface is formed in the first housing part.

In a correspondingly designed filter device, the filter element can be connected to the filter housing particularly easily, since the filter element can be connected to the first housing part, for example, by means of ultrasonic welding with the filter housing open (i.e. before the first housing part is connected to the second housing part).

The first housing part is preferably designed as a housing lower shell and the second housing part as a housing upper shell. More preferably, the first housing part is designed as a housing upper shell and the second housing part as a housing lower shell.

The filter device is preferably designed such that the second housing part has a contact surface, and the filter element is arranged between the first housing part and the second housing part in such a way that the filter element is in contact with the contact surface of the second housing part.

The corresponding configuration of the filter device further increases its stability, since the contact surface of the second housing part prevents the filter element from disengaging from the abutment surface, more precisely from the projection or projections.

The filter element is preferably clamped between the first housing part and the second housing part, such that the second housing part applies a force to the filter element towards the first housing part.

The filter device is preferably designed as follows: the filter device has a filter element designed as a first filter element, a second filter element and a spacer element arranged between the first filter element and the second filter element, wherein the plastic component is designed as a spacer element having a first contact surface connected to the first filter element and having a second contact surface connected to the second filter element, wherein the first contact surface and/or the second contact surface has at least one circumferential projection.

By providing a first filter element and a second filter element, the filter characteristics of the filter device can be adapted to various purposes in the case of a correspondingly designed filter device.

In terms of the choice of filter material, the first filter element and the second filter element are preferably identical.

More preferably, the first filter element is designed as a coarse filter medium and the second filter element as a fine filter medium.

More preferably, the first filter element is designed as a fine filter medium and the second filter element as a coarse filter medium.

More preferably, the filter device is designed such that the first side of the protrusion faces away from the through hole and the second side of the protrusion faces towards the through hole (104), wherein the first side of the protrusion and the surface normal of the abutment face are at a first angle to each other, and wherein the second side of the protrusion and the surface normal of the abutment face are at a second angle to each other, and wherein the first angle is smaller than the second angle.

More preferably, the filter device is designed as follows: such that the first filter element is designed as a coarse filter element and the second filter element as a fine filter element, wherein the coarse filter element is arranged opposite the inlet and the fine filter element is arranged opposite the outlet.

More preferably, the filter device is designed as follows: such that the first filter element is designed as a fine filter element and the second filter element as a coarse filter element, wherein the fine filter element is arranged opposite the inlet and the coarse filter element is arranged opposite the outlet.

More preferably, the filter device is designed as follows: so that the second filter element is designed as a filter bag.

More preferably, the filter device is designed as follows: so that the filter device is designed as a filter device for filtering a liquid medium, in particular for filtering oil.

The filter element preferably comprises cellulose. More preferably, the filter element has glass fibers and mixtures thereof. More preferably, the filter element is of a synthetic material or a mixture thereof. More preferably, the filter element has glass fibers and a mixture of glass fibers and synthetic material. More preferably, the filter element has a fabric made of metal. It is thus clear that there is no restriction on the choice of filter material for the filter element, as long as the filter element is suitable and designed for the filtration of fluids.

More preferably, the filter device is designed as follows: so that the filter device is designed as a suction filter device.

More preferably, the filter device is designed as follows: so that the filter device is designed as a press filter device.

More preferably, the filter device is designed such that the abutment surface and the one or more projections are an integral part of an oil sump for the engine or transmission.

Further advantages, details and features of the invention emerge from the examples described below. Wherein, specifically:

fig. 1 is a schematic cross-sectional view of a first housing part of a filter device of the invention, designed as a housing lower shell, according to a first embodiment of the invention, during a connecting operation of a filter element with the first housing part of the filter device;

FIG. 2 is a cross-sectional view corresponding to FIG. 1, wherein the first housing portion is a portion of a filter device according to a second embodiment of the present invention;

FIG. 3 is a cross-sectional view corresponding to FIG. 1, wherein the first housing portion is a portion of a filter device according to a third embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a filter device of the present invention in an assembled state;

FIG. 5a is a schematic cross-sectional view of a filtration apparatus according to another embodiment of the present invention; and

fig. 5b is a detailed view of the area of the filter device marked in fig. 5 a.

In the following description, the same reference numerals are given to the same components or the same features, and thus the description of the components with reference to one drawing is also applicable to other drawings, thereby avoiding the repetitive description. Furthermore, various features that have been described in connection with one embodiment may also be used alone in other embodiments.

Fig. 4 is a schematic cross-sectional view of a filter device 1 according to the invention. In the exemplary embodiments shown in all the figures, the filter device 1 is designed as a filter device 1 for filtering oil. Thus, in the illustrated embodiment, the oil is the fluid to be filtered. The filter device 1 has a filter housing 100 with an inlet 111 for fluid to enter the housing interior 101 and an outlet 151 for fluid to exit the housing interior 101. It can be seen that the filter housing 101 has a plastic component 110 which is designed as a first housing part 110 and a second housing part 150 which is connected to the first housing part 110. In the embodiment shown, the first housing part 110 is designed as a lower housing part 110 of the housing 100. The second housing part 150 is designed as an upper housing 150 of the filter housing 100. Wherein the inlet 111 is formed in the lower case 110 and the outlet 151 is formed in the upper case 150.

The filter housing 100 has an abutment surface 120 arranged in the housing interior 101, which is formed around the through-opening 104 of the filter housing 100. Thus, the through-hole 104 is defined by the abutment surface 120. It can be seen that the abutment surface 120 is formed in the lower shell 110 of the filter housing 100.

The filtering device 1 also has a filtering element 160 arranged between the inlet 111 and the outlet 151 and designed to filter the fluid, which is circumferentially connected to the abutment surface 120, forcing the fluid delivered from the inlet 111 to the outlet 151 to flow through the filtering element 160.

As can also be seen from fig. 4, the upper shell 150 has a contact surface 152, wherein the filter element 160 is arranged between the lower shell 110 and the upper shell 150 in such a way that the filter element 160 comes into contact with the contact surface 152 of the upper shell 150. Thus, the filter element 160 is sandwiched between the abutment face 120 and the contact face 152.

As can also be seen from fig. 4, on the left and right sides of the filter element 160, according to the illustration in fig. 4, a collecting chamber 105 is formed between the lower shell 110 and the upper shell 150, in which collecting chamber melt jets that may occur during the connection of the filter element 160 to the filter housing 100 can be accommodated.

The filter device 100 shown in fig. 4 can be designed as a suction filter device 100. In the case of a corresponding use of the filter device 1, a negative pressure is generated at the outlet 151, so that the fluid to be filtered is sucked into the housing interior 101 via the inlet 111.

On the other hand, the filter device 1 can also be designed as a filter press device 1. In the case of a corresponding use of the filter device 1, the fluid to be filtered is fed by means of a pump from the inlet 111 into the housing interior 101 at overpressure.

As can be seen in fig. 4, the filter element 160 separates the contaminated side 102 of the housing interior 101 from the clean side 103 of the housing interior 101. As the fluid passes through the filter element 160, the fluid is filtered by the filter element 160.

As can also be seen in fig. 4, the abutment surface 120 has a circumferential projection 121, which is connected to the filter element 160. The connection of the filter element 160 to the protrusion 121 is achieved by ultrasonic welding. The protrusion 121 (which may also be referred to as a first protrusion 121) serves as an energy director 121 when the filter element is welded or connected to the lower case 110. The exact configuration of the projections 120 is explained in more detail below with reference to fig. 1-3.

Fig. 1 is a schematic cross-sectional view of a

plastic component

110, 170, which can be designed as a housing lower shell 110 or as a spacer element 170, which will be described in more detail below with reference to fig. 5a and 5 b. The

plastic member

110, 170 is part of a filter device 1 according to the invention and this figure shows the situation during the connecting operation of the filter element 160 with the

first housing part

110, 170 of the filter device 1. As can be seen, the protrusion 121 has a first side 121_1 and a second side 121_ 2. In this case, the first side 121_1 and the second side 121_2 form an angle 124 with each other, which angle is greater than 90 ° in the embodiment shown. Thus, the included angle 124 is an obtuse angle.

As can be seen from fig. 1 to 3, in the case of the projections 121, and in the case of the second projections 122, which will be described in more detail below with reference to fig. 3, the respective first side surfaces 121_1, 122_2 and the respective second side surfaces 121_1, 122_2 are at an angle of at least 90 ° to one another in a cross section through the

respective projections

121, 122. Wherein the cross section of the

respective protrusion

121, 122 extends transversely, and preferably perpendicularly, to the longitudinal direction of the

respective protrusion

121, 122.

As can also be seen from fig. 1 to 3, when the plastic component 110 is designed as a housing lower shell 110, the first side 121_1 of the projection 121 faces the housing interior 101, and the second side 121_2 of the projection 121 faces away from the housing interior 101. The arrow labeled R1 above protrusion 121 indicates a direction toward housing cavity 101, and the arrow labeled R2 above protrusion 121 indicates a direction away from housing cavity 101. The first side 121_1 of the protrusion 121 and the surface normal 126 of the abutting surface 120 form a first angle 131 with each other, and the second side 121_2 of the protrusion 121 and the surface normal 126 of the abutting surface 120 form a second angle 132 with each other. As can be seen, the first angle 131 is smaller than the second angle 132.

In the embodiment shown in fig. 1-3, the first angle 131 is 120 ° and the second angle 132 is 150 °. However, the present invention is not limited to the corresponding angle. The first angle may be between 105 ° and 135 °. The first angle 131 is preferably between 115 ° and 125 °. More preferably, the first angle 131 is 120 °. The second angle 132 is preferably between 135 ° and 165 °. More preferably, the second angle 132 is between 145 ° and 155 °. More preferably, the second angle 132 is 150 °.

As can also be seen from fig. 1 to 3, the projection 121 has a rounding 123, by means of which the first side 121_1 is connected to the second side 121_ 2. Therefore, the first side 121_1 continuously transitions to the second side 121_ 2.

As can be seen from fig. 1, the height extension 125 of the protrusion 121 corresponds to the thickness extension 161 of the filter element 160.

In order to connect the filter element 160 with the abutment surface 120 and with the projection 121, the filter element 160 is arranged between the abutment surfaces 120, 181, 182 and the sonotrode 200. The sonotrode 200 applies a force to the filter element 160 in a direction toward the abutment surfaces 120, 181, 182 and the protrusion 121. The sonotrode 200 generates high frequency vibrations, the direction of action 201 of which is shown in fig. 1 to 3. Thus, more precisely, the filter element 160 is connected to the abutment surfaces 120, 181, 182 by ultrasonic welding by means of the projections 121 of the abutment surfaces 120, 181, 182. This is because the protrusions 121 are composed of a thermoplastic material that is plasticized by the energy injected through the sonotrode 200.

Fig. 2 shows an alternative configuration of the abutment faces 120, 181, 182. In the case of the abutment surfaces 120, 181, 182 shown in fig. 2, they have a projection 121 which in turn has a base 140 which extends perpendicularly to the abutment surface 120 and is arranged between the abutment surfaces 120, 181, 182 and the first and second side surfaces 121_1, 121_ 2. The height extension 141 of the base 140 substantially corresponds to the height extension 125 of the first and second sides 121_1, 121_ 2. However, the present invention is not limited to the corresponding configuration. The height extension 141 of the base 140 may be different from the height extension of the sides 121_1, 121_ 2. Furthermore, the contact surfaces 120, 181, 182 provided on the right side of the base 140 in fig. 2 can also be arranged on a different plane than the contact surfaces 120, 181, 182 provided on the left side of the base 140. In this regard, according to the present invention, there is no limitation in the configuration of the protrusion 121 and the base 140.

The remaining structure of the filter device 1 shown in fig. 2 is the same as that of the filter device 1 shown in fig. 1, and reference is made to the above description.

Fig. 3 shows a further alternative construction of the filter device 1. The first housing part 110 is designed as a lower shell 110 and has two projections, namely a first projection 121 and a second projection 122. Furthermore, it is of course also possible to design the first housing part 170 as a spacer element 170, which will be explained further below. The first protrusion 121 and the second protrusion 122 are both formed circumferentially, that is, the first protrusion 121 and the second protrusion 122 are both arranged around the through hole 104. The second protrusion 122 is formed around the first protrusion 121, so that the first protrusion 121 is surrounded by the second protrusion 122 in a plan view of the abutting faces 120, 181, 182. The second protrusion 122 also has a first side surface 122_1 and a second side surface 122_2, wherein the first side surface 122_1 and the second side surface 122_2 of the second protrusion 122 form an included angle 124 of at least 90 ° with each other.

As to possible variations of the included angle 124 of the second protrusion 124, there is the same variation possibility as the first side face 121, so the above description is referred to.

In the case of the first housing part 110 being designed as a lower housing part 110, the first side 122_1 of the second projection 122 faces the housing interior 101, while the second side 122_2 of the second projection 122 faces away from the housing interior 101. The first side surface 122_1 of the second protrusion 122 and the surface normal 126 of the abutting surface 120 form a first angle 131, and the second side surface 122_2 of the second protrusion 122 and the surface normal 126 of the abutting surface 120 form a second angle 132. The first angle 131 is less than the second angle 132. As for the variation possibilities of both the first angle 131 and the second angle 132 of the second projection 122, there are the same variation possibilities as in the case of the first projection 121, and therefore reference is made to the respective description above.

Like the first projection 121, the second projection 122 also has a rounding 123, by means of which the first side 122_1 of the second projection 122 is connected to the second side 122_2 of the second projection 22.

Fig. 5a is a schematic cross-sectional view of a filter device 1 according to another embodiment of the invention, and fig. 5b is a detailed view of the area of the filter device 1 marked in fig. 5 a.

The filter device 1 has a first filter element 160 and a second filter element 165. The filter device 1 also has a plastic component 170, which is designed as a spacer element 170 and is arranged between the first filter element 160 and the second filter element 165. The spacer element 170 has a first abutment surface 181 connected to the first filter element 160 and a second abutment surface 182 connected to the second filter element 160. The first and second abutment surfaces 181, 182 each have at least one

circumferential projection

121, 122.

In the illustrated embodiment, the second filter element 165 is designed as a filter bag 165. However, the second filter element 165 can of course also be designed as a simple planar second filter element 165 without filter bags.

With regard to further design options for the spacer 170 and its abutment faces 181, 182, reference is made to the statements made in connection with fig. 1 to 3.

List of reference numerals

1 Filter device

100 filter housing

101 casing inner cavity

102 (of the housing cavity) contaminated side

103 (of the housing cavity) clean side

104 (of the filter housing)

105 (of the filter housing) collecting chamber

110 first housing part/lower housing part/plastic component

111 inlet

120 (of the first housing part) abutment face/abutment flange

121 (first) projection/(first) energy director

121_1 (of the first projection) first side

121_2 (of the first projection) second side

122 (second) projection/(second) energy director

122_1 (of the second projection) first side

122_2 (second raised) second side

123 (convex) rounding

124 (between the first and second side surfaces)

125 (raised) height extension

126 (of the abutting surface) surface normal

131 first angle

132 second angle

140 (raised) base

141 height extension of the base

150 second/Upper housing

151 outlet

152 (of the second housing part)

160 (first) Filter element/Filter Medium

161 (of the filter element) thickness extension

165 second Filter element/Filter Medium

170 spacer element/plastic component

181. 182 (of spacer elements) abutment surface

200 ultrasonic welding electrode

201 (of sonotrode) direction of action

Claims

1. A plastic component (110, 170) for connection with a filter element (160), wherein the plastic component (110, 170) has at least one abutment surface (120, 181, 182) which surrounds a through-opening (104) of the plastic component (110, 170) and can be brought into contact with the filter element (160), wherein the plastic component (110, 170) is characterized in that:

-said at least one abutment surface (120, 181, 182) has at least one circumferential projection (121, 122) which can be connected to the filter element (160);

-the protrusion (121, 122) has a first side (121_1, 122_1) and a second side (121_2, 122_ 2);

-said first side (121_1, 122_1) and said second side (121_2, 122_2) are at an angle (124) of at least 90 ° to each other.

2. The plastic component (110, 170) according to claim 1, characterized in that the projection (121, 122) has a rounding (123), by means of which the first side (121_1, 122_1) is connected with the second side (121_2, 122_ 2).

3. A plastic component (110, 170) according to any of the preceding claims, wherein:

-the abutment surface (120) has at least two circumferential projections (121, 122) which are connected to the filter element (160);

-a second protrusion (122) is formed around the first protrusion (121);

-the second protrusion (122) has a first side (122_1) and a second side (122_ 2); and

-the first side surface (122_1) and the second side surface (122_2) of the second protrusion (122) are at an angle (124) of at least 90 ° to each other.

4. The plastic component (110, 170) according to claim 3, characterized in that the second protrusion (122) has a rounding (123), by means of which a first side (122_1) of the second protrusion (122) is connected with a second side (122_2) of the second protrusion (122).

5. The plastic component (110, 170) according to one of the preceding claims, wherein the projection (121, 122) or projections (121, 122) has a base (140) which extends perpendicular to the abutment face (120) and is arranged between the abutment face (120, 181, 182) and the first and second side faces (121_1, 121_ 2; 122_1, 122_ 1).

6. A plastic component (110, 170) according to any of the preceding claims, wherein the protrusion (121, 122) or protrusions (121, 122) are formed of or are a thermoplastic material.

7. The plastic component (110, 170) according to any of the preceding claims, wherein the height extension (125) of the protrusion (121, 122) or protrusions (121, 122) corresponds to the thickness extension (161) of the filter element (160).

8. The plastic component (110, 170) according to any of the preceding claims, wherein the filter element (160) is connected to the protrusion (121, 122) or protrusions (121, 122) by ultrasonic welding.

9. A filtering device (1) having the following features:

-the filtering device (1) has a filter housing (100) having at least one inlet (111) for fluid into the housing inner cavity (101) and at least one outlet (151) for fluid out of the housing inner cavity (101);

-the filter housing (100) has an abutment surface (120) provided in the housing inner cavity (101) surrounding the through hole (104) of the filter housing (100);

-the filtering device (1) has a filtering element (160) arranged between said inlet (111) and said outlet (151) and designed to filter the fluid, said filtering element being in circumferential contact with said abutment surface (120) so that the fluid delivered from the inlet (111) to the outlet (151) flows through the filtering element (160),

wherein the filter device (1) is characterized in that the filter device (1) has at least one plastic component (110, 170) according to one of claims 1 to 8.

10. A filtering device (1) according to claim 9, characterized in that:

-the plastic member (110) is part of the filter housing (100);

-the abutment face (120, 181, 282) of the plastic member (110, 170) forms the abutment face (120) of the filter housing (100); and

-the at least one circumferential projection (121, 122) is connected with the filter element (160).

11. A filtering device (1) according to claim 10, characterized in that:

-a first side (121_1, 122_1) of the protrusion (121, 122) is facing towards the housing cavity (101) and a second side (121_2, 122_2) of the protrusion (121, 122) is facing away from the housing cavity (101);

-a first side (121_1, 122_1) of the protrusion (121, 122) and a surface normal (126) of the abutment surface (120) are at a first angle (131) to each other;

-a second side (121_2, 122_2) of the protrusion (121, 122) and a surface normal (126) of the abutment surface (120) are at a second angle (132) to each other;

-the first angle (131) is smaller than the second angle (132).

12. A filter device (1) according to claim 10 or 11, wherein:

-the filter housing (100) comprises a plastic member (110, 170) having the features of claim 3;

-a first side (122_1) of the second protrusion (122) is facing towards the housing cavity (101) and a second side (122_2) of the second protrusion (122) is facing away from the housing cavity (101);

-a first side (122_1) of the second protrusion (122) and a surface normal (126) of the abutment surface (120) are at a first angle (131) to each other;

-a second side (122_2) of the second protrusion (122) and a surface normal (126) of the abutment surface (120) are at a second angle (132) to each other; and

-the first angle (131) is smaller than the second angle (132).

13. A filter device (1) according to any one of claims 10 to 12, wherein:

-the filter housing (100) has a first housing part (110) and a second housing part (150) connected to the first housing part (110); and

-the abutment surface (120) is formed in the first housing part (110).

14. A filtering device (1) according to claim 13, characterized in that:

-the second housing part (150) has a contact surface (152); and

-the filter element (160) is arranged between the first housing part (110) and the second housing part (150) such that the filter element (160) is in contact with the contact surface (152) of the second housing part (150).

15. The filtering device (1) according to claim 9,it is characterized in that：

-the filter device (1) has the first filter element (160) designed as a first filter element (160) and a second filter element (165);

-the filter device (1) has a spacer element (170) arranged between the first filter element (160) and the second filter element (165);

-the plastic member (170) is designed as a spacer element (170);

-the spacer element (170) has a first abutment face (181) connected with the first filter element (160) and a second abutment face (182) connected with the second filter element (160);

-the first abutment surface (181) and/or the second abutment surface (182) has at least one circumferential projection (121, 122).

16. A filtering device (1) according to claim 15, characterized in that:

-a first side (121_1, 122_1) of the protrusion (121, 122) faces away from the through hole (104) and a second side (121_2, 122_2) of the protrusion (121, 122) faces towards the through hole (104);

-the first angle (131) is smaller than the second angle (132).

17. A filtering device (1) according to claim 15 or 16, characterized in that:

-the first filter element (160) is designed as a coarse filter element (160) and the second filter element (165) is designed as a fine filter element (165);

-the coarse filter element (160) is arranged opposite the inlet (111); and

-the fine filter element (165) is arranged opposite the outlet (151).

18. A filter device (1) as claimed in any one of claims 15 to 17, characterised in that the second filter element (165) is designed as a filter bag (165).

19. The filter device (1) according to one of the claims 9 to 18, characterised in that the filter device (1) is designed as a filter device (1) for filtering a liquid medium, in particular for filtering oil.

20. A filter device (1) according to any one of claims 9 to 19, characterised in that the filter device (1) is designed as a suction filter device (1).

21. The filter device (1) according to any one of claims 9 to 19, wherein the filter device (1) is designed as a pressure filtration device (1).

22. The filtering device (1) according to any one of the preceding claims, wherein the abutment surface (120) and the protrusion (121, 122) or protrusions (121, 122) are integral components of an oil sump for an engine or transmission.