DE102014015760B4 - Filter housing with lever element - Google Patents

Abstract

Filter housing (12) for a filter (10) for filtering a fluid, with an inflow opening (16), an outflow opening (18), a main flow direction (X) and a filter insert opening (20) having a receiving space (24) for insertion of a Substantially cuboid replaceable filter insert (14) opens along an insertion direction (Y), wherein in the receiving space (44) a housing sealing surface (36) is provided which in cooperation with the seal (30) of the filter insert (14) the filter housing (12) an installed state of the filter insert (14) into a raw area and a clean area, wherein on the filter insert opening (20) a sword-shaped Anpressstruktur (54) into the receiving space (24) can be inserted between the filter insert (14) and filter housing (12) in the installed state of the filter cartridge (14) into the filter housing (12) and a force axially along the main flow direction (X) on the filter cartridge (14) in the direction the housing sealing surface (36) exerts, wherein in the receiving space (44) from the housing sealing surface (36) in the axial direction spaced a lever element (46) is provided which in the installed state of the filter insert (14) a force of a Anpressstruktur (54), the opposite the main flow direction (X) is directed, in a force on the filter cartridge (14) in the main flow direction (X), wherein the lever member (46) has a first lever arm (48) which is disposed closer to the filter cartridge opening (20), and a second lever arm (50) facing away from the filter cartridge opening (20) and wherein the first lever arm (48) cooperates with the pressure structure (54) and the second lever arm (50) cooperates with a filter cartridge (14).

Description

Technical area

The invention relates to a filter housing for a filter for filtering a fluid, in particular of air, for internal combustion engines, a filter with such a filter housing and a method for inserting a filter cartridge.

State of the art

Particularly in construction and agricultural machinery, engine air filtration is becoming increasingly important. More and more powerful air filters are being used as higher engine power and stricter emission guidelines require increased air flow through the engine. More powerful air filters require a higher air volume flow through the filter and / or a longer filter life. This requires a larger filter volume with correspondingly larger interchangeable filter cartridges. When using such filters occur again and again unwanted leaks. These are due, for example, to vibrations that are transmitted to the filter. In this case, high accelerations occur in which at least temporarily a force is exerted on the filter insert, which exceeds the contact pressure of the filter insert and thus significantly reduces the sealing effect. In this way, contaminants can penetrate into the air intake duct and impair the functionality and service life of a motor.

Out JP H09-234 321 A . DE 103 45 684 A1 and JP 2000-130272 A are known in a housing pivotally mounted filter cartridges known. Out US 2008/0148695 A1 and US 2008/0022641 A1 are known by means of two sword-like extensions on the housing cover bracing filter cartridges. From the EP 1 920 816 A1 is known by means of a wedge brace filter element. From the FR 2 911 924 A1 a filter element mounted by means of a supporting body is known. From the JP 2011-153613 A is known by means of a lever bracing filter element.

The invention is based on the object to provide a filter housing and a filter with such a filter housing, which avoid the disadvantages mentioned and in particular improve the tightness between the filter cartridge and filter housing even at high accelerations.

Disclosure of the invention

The object is achieved by a filter housing for a filter for filtering a fluid, in particular air, for internal combustion engines according to claim 1 and a method for inserting a filter cartridge according to claim 9. Such a filter housing has an inflow opening, an outflow opening, a main flow direction and a filter cartridge opening on. Within the filter housing is a receiving space for inserting a substantially cuboid replaceable filter insert along an insertion direction. The receiving space is accessible through the filter cartridge opening. The term filter cartridge is intended to designate the interchangeable portion of a filter which receives at least a portion of the filtrate. The filter insert is also referred to as a filter element.

In the receiving space, a housing sealing surface is provided, which, in cooperation with the seal of a filter insert, divides the filter housing into a raw area and a clean area in an installed state of the filter insert.

About the filter insert opening a sword-shaped Anpressstruktur is inserted into the receiving space, which dips between the filter insert and the filter housing in the installed state of the filter insert in the receiving space and exerts a force axially along the main flow direction of the filter insert in the direction of the housing sealing surface.

In the receiving space spaced from the housing sealing surface in the axial direction, a lever element is provided, which converts a force of the Anpressstruktur, which is directed against the main flow direction in the installed state of the filter element in a force on the filter element in the main flow direction.

The invention provides that the lever element has a first lever arm, which is arranged closer to the filter insert opening and has a second lever arm, which faces away from the filter insert opening. Due to the design of the lengths of the two lever arms, the power transmission can be defined by the Anpressstruktur on the lever arm on the filter element. In this context, it may for example also be provided that the lever arm is mounted replaceably on the filter housing. In this way, in various filter cartridges for a filter housing, the power transmission characteristic can be adapted to the various filter cartridges.

It is provided that the first lever arm cooperates with the Anpressstruktur and the second lever arm cooperates with a filter insert.

The filter housing according to the invention offers a double advantage. On the one hand can by the lever element via the Anpressstruktur introduced force to be forwarded at locations that are located away from the filter insert opening in the lower area of the receiving space. In particular, use can be made of the lever principle and the force introduced can be increased or the lever travel lengthened. On the other hand, the Anpressstruktur can be made shorter in the insertion. This represents a simplified handling. In particular in installation situations where the filter cartridge opening is not accessible without restriction, a shorter contact pressure structure may be advantageous. In addition, the weight of the Anpressstruktur reduced.

An advantageous embodiment of the invention provides that the sword-shaped pressure structure and the lever element are provided in pairs in the filter housing. In this way, a uniform initiation of the forces transmitted by the Anpressstruktur and the lever element forces on the filter insert.

A particular embodiment of the invention provides that the lever element is designed so that it rolls in the power transmission to the filter housing. It is therefore not necessary to store the lever element by means of a rotary joint or the like, which must absorb the full contact force. Rather, it is sufficient to provide a loose, but rotatable articulation. This must absorb no forces in the power transmission from the Anpressstruktur on the lever element on the filter element, since the lever element is supported on the filter housing and rolls on this.

A preferred embodiment of the invention provides that the pressure structure is designed so that the pressure structure dips less than half of the extension of the filter insert in the insertion direction. The handling of the filter housing is thereby significantly facilitated, for example, when replacing the filter cartridge. The contact pressure structure can also be fastened, for example, to a cover which is pivotably hinged to the filter housing. After inserting the filter insert then only the lid must be closed, a deep insertion of the Anpressstruktur is then no longer necessary.

In a specific embodiment, it may be provided that the second lever arm applies a force to the filter insert at a location which faces away from the filter insert opening. Thus, the force introduced by the Anpressstruktur in the filter housing force can be forwarded to a location that are not available with sword-shaped Anpressstrukturen conventionally or characterized only by a small force.

A preferred embodiment of a filter housing according to the invention provides that the lever element has a stretched L-shape. In particular, it may be provided that the angle between the first lever arm and the second lever arm is 50 ° ± 10 °.

The idea according to the invention can also be realized by a filter having a filter housing according to the invention and a filter insert as well as by a method for inserting a filter insert into a filter housing of a filter.

The filter insert according to the invention has an inflow opening, an outflow opening and a main flow direction, wherein the filter insert can be inserted into a receiving space of a filter housing of the filter along an insertion direction.

The filter cartridge is substantially cuboidal and has a seal which, in cooperation with a housing sealing surface of the filter housing divides the filter housing into a raw area and a clean area in an installed state of the filter insert and is adapted to receive a force of a sword-shaped pressure structure when installed Force the sword-shaped pressure structure is converted into a force on the filter cartridge in the main flow direction.

The method according to the invention for inserting a filter insert into a filter housing of a filter has the following steps:
Inserting the filter cartridge in a receiving space of the filter housing so that a seal of the filter cartridge comes into contact with a housing sealing surface of the filter housing,
Inserting a cover into the filter housing, wherein the cover has a contact pressure structure, which in the inserted state of the cover is located on both sides of a main flow direction of the filter,
wherein the Anpressstruktur is sword-shaped and immersed in the insertion of the lid in the receiving space on both sides of the filter insert between the filter cartridge and the filter housing,
wherein a force applied by the pressure structure transmits to a lever element in the filter housing,
wherein the lever member in turn transmits this force to the filter cartridge such that the seal of the filter cartridge is pressed against the housing sealing surface of the filter housing.

Brief description of the drawings

The invention will now be explained in more detail with reference to the drawings. Show it:

1 - 3 a sectional view of a filter housing according to the invention with a filter insert in different insertion positions;

4 a sectional view of the filter housing the 1 - 3 with the filter insert in the installed position;

5 a detailed view of a lever element according to the invention; and

6 a flow chart for a method according to the invention.

Embodiment (s) of the invention

The 1 to 4 show a filter according to the invention 10 with a filter housing according to the invention 12 and a filter cartridge 14 , In the 1 - 3 is the filter element 14 in different insertion positions, in 4 shown in the installed state.

The filter housing 12 has a flow opening 16 , an outflow opening 18 and a main flow direction X on. In the in the 1 - 4 shown position, the filter housing 12 at its top a filter cartridge opening 20 on. This is in the 1 - 3 open, in 4 she is through a lid 22 locked. The filter cartridge opening 20 provides access to a recording room 24 into which a filter cartridge 14 can be used. The insertion of the filter insert 14 takes place along an insertion direction Y. In the present embodiment, the main flow direction X and the insertion direction Y are substantially perpendicular to each other. Of course, deviations from the 90 ° angle within a tolerance of ± 10 ° are possible.

The filter insert 14 is in the present embodiment substantially cuboid with a long edge 26 , which is substantially parallel to the insertion direction Y during insertion and in the installed state, and a short edge 28 which is arranged substantially in the installed state parallel to the main flow direction X.

The filter insert 14 also has one of the outflow opening 18 facing seal 30 in a plane perpendicular to the main flow direction X around the filter cartridge 14 revolves and so seal the filter housing between a raw side 32 and a clean side 34 allows. This is in the recording room 24 a housing sealing surface 36 also provided in a plane perpendicular to the main flow direction X to the filter cartridge 14 revolves, the course of the seal 30 corresponds and concerns the seal 30 the sealing effect allows.

On the filter insert 14 is along the long edges 26 parallel to the insertion direction Y, one of the inflow opening 16 facing pressing 38 provided substantially over the entire insertion length of the filter cartridge 14 extends. In a section 40 the pressing step 38 closer to the filter cartridge opening 20 is, indicates the Anpressstufe 38 a first distance to the housing sealing surface 36 on. In a section 42 the pressing step 38 farther away from the filter cartridge opening 20 is a second distance to the housing sealing surface 36 provided, which is greater than the first distance.

Furthermore, the filter housing 12 in the recording room 24 a support level 44 on. Both the pressing step 38 of the filter insert 14 as well as the support level 44 of the filter housing 12 are provided in duplicate, one step on each side of the filter cartridge 14 provided, ie in the insertion direction Y in the receiving space 24 seen left and right of the main flow direction X. The support level 44 of the filter housing 12 lies in the main flow direction X seen before the pressing 38 of the filter insert 14 ,

In the immediate vicinity of the support level 44 is a lever element 46 intended. This is also in 5 shown in a detailed view. The lever element 46 has an elongated L-shape with a first lever arm 48 and a second lever arm 50 on. The first lever arm 48 extends in the direction of the filter cartridge opening 20 , the second lever arm 50 extends in the direction of the insertion direction Y in the interior of the receiving space 24 , Both lever arms 48 . 50 enclose an angle of about 50 ° in the present embodiment and are in the direction of the outflow opening 18 oriented. At the point where the first lever arm 48 and the second lever arm 50 meet is in the lever element 46 a circular recess 52 intended. The recess 52 serves to attach the lever element 46 on the filter housing 12 , Accordingly intervenes in the 1 - 4 not shown pin in the recess 52 and thus holds the lever element 46 rotatably mounted in its place.

As in the 3 and 4 shown is the filter opening 20 through a lid 22 closable. The lid 22 has a pressure structure 54 on. This is the same as the pressure step 38 and the support level 44 left and right of the main flow direction X available. The pressure structure 54 is sword-shaped and dives into the recording room 24 on both sides of the filter element 14 between the filter cartridge 14 and the filter housing 12 one. The sword-shaped pressure structure 54 indicates a first of the pressing 38 facing surface 56 and a second lever element 46 facing surface 58 on. Both surfaces 56 . 58 include an acute angle to give a wedge-shaped geometry. In the installed state of the filter insert 14 closes the lid 22 the filter cartridge opening 20 and the pressure structure 54 touches the Anpressstufe 38 of the filter insert 14 , Here is the first surface 56 the pressure structure 54 with the first section 40 the pressing step 38 in contact. At the same time, the second surface contacts 58 the first lever arm 48 of the lever element 46 , During the insertion process of the lid 22 or the Anpressstruktur 54 that will be on the lid 22 or the Anpressstruktur 54 applied force over the two surfaces 56 . 58 on the lever element 46 and the filter cartridge 14 transfer. The lever element 46 in turn, transfers this force to the lower part of the filter cartridge 14 , on the second section 42 the pressing step 38 , In this way, the filter cartridge 14 both near the filter cartridge opening 20 as well as at the bottom of the recording room 24 against the housing sealing surface 36 pressed. At the same time offers the lever element 46 When vibrations due to its geometry a certain spring action, the vibration-induced forces in the axial direction, ie in the main flow direction X, and ensures a permanent compression of the filter insert 14 against the housing sealing surface 36 ,

The geometry of the lever element 46 is chosen so that during the insertion of the filter cartridge 14 in the recording room 24 the pressing step 38 easily on the lever element 46 can slip past. This is achieved by having the recess 52 above the center of gravity of the lever element 46 is appropriate. This prevents an automatic turning of the lever element 46 with the first lever arm 48 in the main flow direction X.

In summary, by the two lever elements 46 effectively the through the lid 22 or the Anpressstruktur 54 in the filter housing 12 initiated force both in the filter insert opening near area and in the lower area of the receiving space 24 on the filter cartridge 14 diverted. This allows a largely flat pressing of the filter insert 14 against the housing sealing surface 36 , At the same time, the lever element 46 a spring element, the vibration-induced accelerations of the filter cartridge 14 counteracts.

The method according to the invention for inserting a filter insert into a filter housing of a filter has the following steps:
Inserting the filter insert in a receiving space of the filter housing, so that a seal of the filter insert comes into contact with a housing sealing surface of the filter housing (S1),
Inserting a cover into the filter housing, wherein the cover has a contact pressure structure, which in the inserted state of the cover is located on both sides of a main flow direction of the filter (S2),
wherein the Anpressstruktur is sword-shaped and immersed in the insertion of the lid in the receiving space on both sides of the filter insert between the filter cartridge and the filter housing,
wherein a force applied by the pressure structure transmits to a lever element in the filter housing,
wherein the lever member in turn transmits this force to the filter cartridge such that the seal of the filter cartridge is pressed against the housing sealing surface of the filter housing (S3).

Claims (9)

Filter housing ( 12 ) for a filter ( 10 ) for filtering a fluid, with a flow opening ( 16 ), a discharge opening ( 18 ), a main flow direction (X) and a filter cartridge opening ( 20 ), which has a receiving space ( 24 ) for inserting a substantially cuboid replaceable filter cartridge ( 14 ) along an insertion direction (Y), wherein in the receiving space ( 44 ) a housing sealing surface ( 36 ), which in cooperation with the gasket ( 30 ) of the filter insert ( 14 ) the filter housing ( 12 ) in an installed state of the filter cartridge ( 14 ) into a raw area and a clean area, wherein the filter insert opening ( 20 ) a sword-shaped pressure structure ( 54 ) in the reception room ( 24 ) is inserted between the filter insert ( 14 ) and filter housing ( 12 ) in the installed state of the filter cartridge ( 14 ) in the filter housing ( 12 ) and a force axially along the main flow direction (X) on the filter cartridge ( 14 ) in the direction of the housing sealing surface ( 36 ), wherein in the receiving space ( 44 ) from the housing sealing surface ( 36 ) in the axial direction a lever element ( 46 ) is provided, which in the installed state of the filter cartridge ( 14 ) a force of a pressure structure ( 54 ), which is directed against the main flow direction (X), in a force on the filter cartridge ( 14 ) in the main flow direction (X), wherein the lever element ( 46 ) a first lever arm ( 48 ), which is closer to the filter cartridge opening ( 20 ), and a second lever arm ( 50 ), which extends from the filter cartridge opening ( 20 ) and wherein the first lever arm ( 48 ) with the pressure structure ( 54 ) and the second lever arm ( 50 ) with a filter cartridge ( 14 ) cooperates. Filter housing according to claim 1, wherein the sword-shaped pressure structure ( 54 ) and the lever element ( 46 ) in pairs in the filter housing ( 12 ) are provided. Filter housing according to claim 1 or 2, wherein the lever element ( 46 ) is designed so that it the power transmission to the filter housing ( 12 ) rolls off. Filter housing according to one of the preceding claims, wherein the pressure structure ( 54 ) is designed so that the Anpressstruktur ( 54 ) less than half the extension of the filter cartridge ( 14 ) in the insertion direction (Y). Filter housing according to one of the preceding claims, wherein the second lever arm ( 50 ) a force on the filter cartridge ( 14 ) is applied at a location that is accessible from the filter cartridge opening ( 20 ) is turned away. Filter housing according to one of the preceding claims, wherein the lever element ( 46 ) has an elongated L-shape. Filter housing according to claim 6, wherein the angle between the first lever arm ( 48 ) and the second lever arm ( 50 ) 50 ° ± 10 °. Filter ( 10 ) with a filter housing ( 12 ) according to one of the preceding claims and with a filter insert ( 14 ). Method for inserting a filter insert ( 14 ) in a filter housing ( 12 ) of a filter ( 10 ), with the steps: inserting the filter cartridge ( 14 ) in a receiving room ( 24 ) of the filter housing ( 12 ), so that a seal ( 30 ) of the filter insert ( 14 ) on a housing sealing surface ( 36 ) of the filter housing ( 12 ) is concerned, inserting a lid ( 22 ) in the filter housing ( 12 ), the lid ( 22 ) a pressure structure ( 54 ), which in the inserted state of the lid ( 22 ) on both sides of a main flow direction (X) of the filter ( 10 ), wherein the pressure structure ( 54 ) is formed sword-shaped and at the onset of the lid ( 22 ) in the reception room ( 24 ) on both sides of the filter cartridge ( 14 ) between the filter cartridge ( 14 ) and the filter housing ( 12 ) immersed, whereby one by the Anpressstruktur ( 54 ) applied force on a lever element ( 46 ) in the filter housing ( 12 ), whereby the lever element ( 46 ) again this force on the filter cartridge ( 14 ) transmits such that the seal ( 30 ) of the filter insert ( 14 ) against the housing sealing surface ( 36 ) of the filter housing ( 12 ) is pressed, wherein the lever element ( 46 ) a first lever arm ( 48 ), which is closer to the filter cartridge opening ( 20 ), and a second lever arm ( 50 ), which extends from the filter cartridge opening ( 20 ) and wherein the first lever arm ( 48 ) with the pressure structure ( 54 ) and the second lever arm ( 50 ) with a filter cartridge ( 14 ) cooperates.

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