Filtration assembly

Abstract

The invention is a filtration assembly (900) which extends along an axis (X-X) and comprises: i) a filtering cartridge (1); ii) a filter body (2) suitable for engaging the filtering cartridge (1), preferably comprising a filtration chamber (200); ii) engagement / disengagement means (3) comprising cartridge members (4) comprised in the filtering cartridge (1) and body members (5) comprised in the filter body (2), specially shaped to be configurable in an engagement configuration by means of a mutual first axial insertion action followed by a mutual second rotational action, in clockwise or counterclockwise direction, and in a disengagement configuration by means of a mutual axial extraction action, respectively. The filtering cartridge (1) comprises, at an axial end, an end plate (10), wherein said cartridge members (4) comprising at least two locking groups (40) are positioned on the end plate (10) comprising a shaft (41) and a head (42) positioned at the axial end of the shaft (41) protruding therefrom in a lateral direction or in a radial direction defining at least one cartridge undercut (43). Said body members (5) are suitable for cooperate with said end plate (10) comprising: - at least two axial guides (50) in which the two locking groups (40) slide, respectively, upon the first axial insertion action; - at least two housings (52) in which, in the engagement configuration, the locking groups (40) are housed; - at least two circumferential ramps (51), wherein each circumferential ramp (51) extends angularly from an axial guide (50) with a first axial edge (511) positioned at a first radius (r1) proximal to the axial guide (50) up to a second axial edge (512) proximal to, in particular facing, a housing (52) positioned at a second radius (r2) different from the first radius (R1), so that upon the rotational action the respective locking group (40) yields elastically in the radial direction, sliding on the circumferential ramp (51).

Description

"FILTRATION ASSEMBLY"DESCRIPTIONField of application

[0001] The present invention relates to a filtration assembly for a fluid.

[0002] The present invention preferably relates to a filtration assembly for a fluid for automotive use.

[0003] The context wherein the present invention falls is preferable that of systems for the filtration of a fluid with particular reference to a fluid necessary for the operation of a motor vehicle. Preferably, the fluid filtration assembly and the components that comprise it, of the present invention, have application in the fuel supply circuits of a vehicle .

[0004] The present invention preferably relates to a filtration assembly for an Indus trial-type fluid.

[0005] Fluid filtration assemblies are well known in the art .

[0006] Known filtration assemblies comprise one (or more) filtering cartridges integrally connected, and in some cases also fluidically connected, to a respective filter body. In the present discussion, "filter body" refers to any component (or group of components) within which the filtering cartridge is housable andpreferably is fluidically connectable .

[0007] A particularly acute problem in known filtration assemblies is that of performing the operational connection between said filtering cartridges and said filter bodies in such a way that is secure , for example in such a way that avoids any mutual disconnections , but at the same time is simply achievable and replicable in such a way as to allow for simple and intuitive replacement and / or maintenance operations .

[0008] In the known solutions , in fact , designers find themselves choosing one of the two requirements while sacri ficing the other . Solution of the invention

[0009] The obj ect of the present invention is , therefore , to provide a filtration assembly that ensures the secure locking of the filtering cartridge to the respective filter body while having secure , simple and intuitive engagement and disengagement operations .

[0010] This obj ect is achieved by means of the filtration assembly claimed in claim 1 . The claims dependent thereon describe preferred embodiment variants involving further advantageous aspects . Description of the drawings

[0011] Further features and advantages of the invention will be made apparent from the following description of preferred embodiment examples thereof, provided purely by way of non-limiting example, with reference to the accompanying figures, wherein

[0012] - Figure 1 shows a perspective view of a filtration assembly in accordance with the present invention;

[0013] - Figure 2 is a lateral view of the filtration assembly in accordance with the present invention, according to a first embodiment;

[0014] - Figure 2a is a sectional view of the filtration assembly along a section plane A-A of Figure 2;

[0015] - Figure 3 is a perspective view of separate parts of a cartridge of a cup body comprised within the filtration assembly of Figure 2;

[0016] - Figures 4a, 4b, 4c and 4d show some assembly steps, and in particular means of engagement / disengagement , of the filtration assembly of Figure 2;

[0017] - Figure 5 shows a disassembly step, and in particular means of engagement / disengagement, of the filtration assembly of Figure 2;

[0018] - Figure 6 is a perspective view of a portionof the filter body of the filtration assembly of Figure 2;

[0019] - Figures 6a and 6b are a front view and a view from above of the filter body of Figure 6;

[0020] - Figure 7 is a perspective view of an end plate of the filtration assembly of Figure 2;

[0021] - Figures 7a and 7b are a front view and a view from above of the end plate of Figure 7;

[0022] - Figure 8 is a side view of the filtration assembly in accordance with the present invention, according to a second embodiment;

[0023] - Figure 8a is a sectional view of the filtration assembly along a section plane A-A of Figure 8;

[0024] - Figures 9a, 9b, 9c, 9d and 9e show some assembly steps, and in particular engagement / disengagement means, of the filtration assembly of Figure 8;

[0025] - Figure 10 shows a disassembly step, and in particular engagement / disengagement means, of the filtration assembly of Figure 8;

[0026] - Figure 11 is a perspective view of a portion of the filter body of the filtration assembly of Figure 8;

[0027] - Figure Ila is a view from above of theportion of the filter body of the filtration assembly of Figure 11;

[0028] - Figure 12 is a perspective view of an end plate of the filtration assembly of Figure 8;

[0029] - Figures 12a and 12b are a front view and a view from above of the end plate of Figure 8.Detailed description

[0030] In the accompanying figures, the reference numeral 900 indicates a filtration assembly according to the present invention in its entirety. The axis X-X shows the direction of development along and around which said filtering assembly 1 and the components thereof develop.

[0031] Furthermore, the numeral 1 indicates a filtering cartridge, and the numeral 2 indicates a filter body; the numeral 3 on the other hand indicates the engagement / disengagement means that are suitable for allowing the filtering cartridge and filter body to be engageable / disengageable therebetween.

[0032] Preferably, the filtering cartridge 1 and the filter body 2 in turn extend along and about the axis X-X.

[0033] According to a preferred embodiment, the filtering cartridge 1 comprises a filtering medium 110 coalescent, with an annular shape, and a hydrophobicseparator 120 suitable for performing the separation from water.

[0034] According to a preferred embodiment, the filtering cartridge 1, but in general the filtration assembly 900, is suitable for filtering fuel, preferably diesel.

[0035] According to a preferred embodiment, the filtering medium 110 is of the cylindrical or tubular type .

[0036] Preferably, said filtering medium 110 is configured as a septum of depth.

[0037] Said filtering medium 110 is preferably configured as a pleated element in the form of a star.

[0038] According to a preferred embodiment, the filtering cartridge 1 is traversable by the fluid being filtered in a radial direction from the inside to the outside .

[0039] The hydrophobic separator 120 is preferably positioned fluidically downstream of the filtering medium 110, surrounding the filtering medium 110 from the outside.

[0040] According to a preferred embodiment, the filtering cartridge 1 is traversable by the fluid being filtered in a radial direction from the outside to the inside .

[0041] The hydrophobic separator 120 is preferably positioned fluidically downstream of the filtering medium 110, being positioned inside the central cavity defined by the filtering medium 110.

[0042] According to the present invention, the filtering cartridge 1 comprises an end plate 10.

[0043] According to a preferred embodiment, the filtering cartridge 1 comprises two end plates.

[0044] According to a preferred embodiment, the end plate 10 is specifically suitable for sealingly engaging, in a radial direction, the filter body 2.

[0045] According to a preferred embodiment, the end plate 10 comprises at least one slit 150 through which the water separated by the water separator 120 flows.

[0046] Preferably, the radial position of the slit 150 is a function of the direction of circulation of the fluid filtrating through the filtering medium 110, for example being radially external to the filtering medium 110 with an inner-outer radial circulation direction .

[0047] In an embodiment variant, the slit 150 is radially internal to the filtering medium 110 with an outer-inner radial circulation direction.

[0048] According to a preferred embodiment, the filter body 2 comprises therein a filtration chamber200 in which the filtering cartridge 1 is housable.

[0049] According to a preferred embodiment, the filtering cartridge 1 sealingly engages the filter body 2, identifying a water collection chamber 280 inside said filtration chamber 200.

[0050] According to a preferred embodiment, said end plate 10 sealingly engages the filter body 2, identifying a water collection chamber 280 inside said filtration chamber 200.

[0051] According to a preferred embodiment, the engagement / disengagement means 3 described below are housed within said water collection chamber 280.

[0052] Preferably, the filter body 2 also comprises a drainage hole for draining the separated and collected water.

[0053] According to a preferred embodiment, the filter body 2 comprises a cap body 21 and a cup body 20 in which the mutual engagement, preferably along the axis X-X, defines the filtration chamber 200.

[0054] The cap body 21 and the cup body 20 are preferably mutually screwable together.

[0055] According to a preferred embodiment, the cup body 20 comprises a bottom, positioned axially opposite the cap body 21.

[0056] Preferably, the cup body 20 also comprisesside walls 201 .

[0057] Preferably, the cup body 20 also comprises a central collar 202 .

[0058] Preferably, the end plate 10 is suitable for engaging the cup body 20 .

[0059] The engagement / disengagement means 3 comprise cartridge members 4 comprised within the filtering cartridge 1 and body members 5 comprised within the filter body 2 .

[0060] Preferably, the body members 5 are comprised within the cup body 20 .

[0061] Preferably, the body members 5 are comprised upon the side walls 201 .

[0062] Preferably, the body members 5 are comprised upon the central collar 202 .

[0063] According to the present invention, the filtering cartridge 1 is suitable for engaging the filter body 2 by means of the engagement / disengagement means 3 .

[0064] According to the present invention, the engagement / disengagement means 3 comprise cartridge members 4 and body members 5 respectively specially shaped to be configurable in an engagement configuration by means of a mutual first axial insertion action followed by a mutual second rotationalaction, in clockwise or counterclockwise direction, and in a disengagement configuration by means of a mutual axial extraction action .

[0065] According to the present invention, the axial extraction action is performed in a direction that is opposite to the axial action necessary for bringing the filtering cartridge 1 and the filter body 2 closer together before reaching the engagement configuration .

[0066] According to a preferred embodiment , the engagement / disengagement means 3 comprise cartridge members 4 and body members 5 respectively specially shaped to be configurable in an engagement configuration exclusively by means of a mutual first axial insertion action followed by a mutual second rotational action and in a di sengagement configuration by means of a mutual axial extraction action .

[0067] In other words , the engagement configuration is only achievable by performing an axial insertion action in sequence and then a rotational action .

[0068] In other words , the disengagement configuration is only achievable by performing an axial extraction action, i . e . an axial action in the opposite direction to the axial action necessary in order to bring the filtering cartridge 1 and the filter body 2 closer together before reaching the engagementconfiguration .

[0069] According to the present invention, and as described below, said second rotational insertion action is performable indiscriminately clockwise or counterclockwise .

[0070] As mentioned, the filtering cartridge 1 comprises an end plate 10 at one axial end, wherein said cartridge members 4 are positioned upon the end plate 10.

[0071] The cartridge members 4 comprise at least two locking groups 40 which extend substantially in the axial direction along the axis X-X.

[0072] Each locking group 40 comprises a shaft 41 and a head 42 positioned at the axial end of the shaft 41.

[0073] Preferably, said head 42 protrudes from the shaft 41 in a lateral direction, i.e., circumferentially or tangentially.

[0074] Or else said head 42 protrudes from the shaft 41 in a radial direction.

[0075] According to the present invention, the shaft 41 and the head 42 define at least one cartridge undercut 43.

[0076] According to a preferred embodiment, the locking group 40 is T-shaped, and the head 42 comprisestwo head teeth 420 extending in a lateral direction from the shaft 41, defining two cartridge undercuts 43.

[0077] Preferably, the head 42 has a tapered shape thinning distally from the shaft 41.

[0078] Preferably, the head 42 has a tapered shape thinning distally from the shaft 41 in the lateral direction .

[0079] Preferably, the head tooth 42 (or the head teeth 42) has a tapered shape thinning distally from the shaft 41.

[0080] Preferably, the head tooth 42 (or the head teeth 42) has a tapered shape thinning distally from the shaft 41 in the lateral direction.

[0081] According to a preferred embodiment, the shaft 41 of each locking group 40 is fastened to the end plate 10 at a shaft base portion 410.

[0082] According to a preferred embodiment, the shaft 41 is shaped so that the head 42 and shaft base 410 lie on two imaginary circumferences Cl and C2, having, mutually different, radii Rcl, Rc2.

[0083] Preferably, the shaft 41 comprises a first planar segment Pl comprising the shaft base 410 and lying on a first imaginary circumference Cl and a second planar segment P2 comprising the head 42 and lying on a second imaginary circumference C2.

[0084] In other words , the first planar segment Pl is spaced apart from the axis X-X at the distance of the first imaginary circumference radius Rcl , while the second planar segment P2 is spaced apart from the axis X-X at the distance of the second imaginary circumference radius Rc2 .

[0085] According to a preferred embodiment , the first planar segment Pl lies on an imaginary circumference Cl with a radius greater than the radius of the imaginary circumference C2 on which the shaft base 410 lies . In other words , the first imaginary circumference radius Rcl is greater than the second imaginary circumference radius Rc2 .

[0086] According to a preferred embodiment , the first planar segment Pl lies on an imaginary circumference Cl with a smaller radius than the radius of the imaginary circumference C2 on which the shaft base 410 lies . In other words , the first imaginary circumference radius Rcl is smaller than the second imaginary circumference radius Rc2 .

[0087] According to a preferred embodiment , the shaft 41 further comprises a connection segment PI that j oins the first planar segment Pl and the second planar segment P2 .

[0088] According to a preferred embodiment , theconnection segment PI is connected to the first planar segment Pl by means of the first fitting Rxl and is connected to the second planar segment P2 by means of the second fitting Rx2.

[0089] Preferably, the connection segment PI is inclined with respect to the axis X-X .

[0090] Preferably, the connection segment PI extends with a planar extension.

[0091] Preferably, the connection segment PI extends over an arched plane.

[0092] According to a preferred embodiment, the head 42 comprises an inclined cartridge edge 421, facing the cartridge undercut 43. Preferably, at each tooth 420, the head 42 comprises an inclined cartridge edge 421.

[0093] According to a preferred embodiment, the cartridge members 4 comprise three or four locking groups 40 which are angularly equidistant.

[0094] According to the present invention, the body members 5 are suitable for cooperating with said end plate 10.

[0095] The body members 5 comprise at least two axial guides 50 in which the two locking groups 40 slide, respectively, during the first axial insertion action .

[0096] Furthermore, the body members 5 comprise atleast two housings 52 in which, in the engagement configuration, the locking groups 40 are housed.

[0097] Each housing 52 is specially shaped complementary to the head 42, defining at least one body undercut 53, so as to hold said head 42 in the engagement configuration and to allow for the disengagement thereof by the axial extraction action.

[0098] Each housing 52 is suitable for housing the second planar segment P2 of the shaft 41. Preferably, the shaft base 410 remains outside the housing 52 with the cartridge in the assembled position.

[0099] Preferably, the number of axial guides 50 and housings 52 is equal to the number of locking groups 40.[000100] According to the present invention, moreover, the body members 5 further comprise at least two circumferential ramps 51.[000101] Preferably, the body members 5 comprise at least two pairs of circumferential ramps 51 arranged on either side of a respective housing 52.[000102] Each circumferential ramp 51 extends angularly starting from an axial guide 50 up to a housing 52.[000103] Each circumferential ramp 51 extends from a first axial edge 511 to a second axial edge 512.[000104] Each first axial edge 511 is positioned at a first radius rl .[000105] Preferably, said first axial edge 511 is proximal to the axial guide 50.[000106] In other words, the first axial edge 511 is in an angular position adjacent to the axial guide 50. [000107] Said first radius rl is the radius with respect whereto the axial guide 50 extends adjacent to said first axial edge 511.[000108] Each second axial edge 512 is positioned at a second radius r2. Said second radius r2 is different from the first radius rl .[000109] Preferably, said second axial edge 512 is proximal to the housing 52.[000110] In other words, the second axial edge 512 is in an angular position adjacent to the housing 52.[000111] According to the present invention, during the assembly sequence each locking group 40, having performed the first axial insertion action at the respective axial guide 50, is the object of the second rotational action and, sliding upon a respective circumferential ramp 51, elastically yields in a radial direction .[000112] Preferably, as the rotation continues, by passing the second axial edge 512, the locking group 40snaps and positions itself within the housing 52.[000113] Preferably, continuing the rotation, passing the second axial edge 512, the locking group 40 snaps in the direction opposite to the development of the circumferential ramp 51 and positions itself in the respective housing 52 thereby implementing the filtering cartridge 1.[000114] As mentioned, the housing 52 has a shape complementary to the head 42.[000115] Preferably, the housing 52 comprises an inclined body edge 521 facing the body undercut 53.[000116] Preferably, the housing 52 comprises an inclined body edge 521 at each tooth 42.[000117] According to a preferred embodiment, the inclined body edge 521, preferably the inclined body edges 521, extends from the second axial edge 512.[000118] In particular, the inclined cartridge edge 421 and the inclined body edge 521 are specially shaped in order to allow for mutual sliding in the extraction direction (i.e., in the direction opposite to the insertion direction) and thus to allow for the disengagement of the locking group 40 from the respective housing 52.[000119] Preferably, the inclined cartridge edge 421 and the inclined body edge 521 are specially shaped toallow for radial yielding of the locking group 40 when the axial extraction action is performed.[000120] In particular, the cartridge inclined edges 421 and the body inclined edges 521 are specially shaped to allow mutual sliding in the axial direction of extraction (i.e., in the direction opposite to the insertion direction) and thus to allow for disengagement of the locking group 40 from the respective housing 52.[000121] Preferably, the inclined cartridge edges 421 and the inclined body edges 521 are specially shaped to allow for radial yielding of the locking group 40 when the axial extraction action is performed.[000122] According to a preferred embodiment, the axial guide 50 is specially shaped to allow for the axial insertion of the locking group 40, i.e., to allow for the axial insertion of the filtering cartridge 1 toward the coupling position, while the housing 52 is specially shaped to prevent axial insertion of the locking group 40, i.e., to prevent axial insertion of the filtering cartridge 1 towards the coupling position .[000123] According to a preferred embodiment, the body members 5 comprise at least one step 510 suitable for providing an abutment against the end plate 10 in thefirst axial insertion action.[000124] According to a preferred embodiment, the body members 5, at each circumferential ramp 51, comprise a step 510 suitable for providing an abutment to the end plate 10 in the first axial insertion action.[000125] In particular, the step 510 is such as to assist in identifying the correct angular position of the filtering cartridge 1 before proceeding with the axial insertion action.[000126] In particular, the step 510 is such that it is engageable by the locking group 40 with the filtering cartridge 1 in the wrong angular position.[000127] With the filtering cartridge 1 in the correct angular position, i.e., with the locking group 40 positioned axially facing the respective axial guide 50, the step 510 is such that it is engageable by the end plate 510. That is to say that the presence of the step 510 causes the end plate 10 to be axially movable over a stroke that ends with the engagement of the end plate with the step 510.[000128] Preferably each step 510 extends over an angular segment corresponding to the position of the housing 52.[000129] Innovatively, the filtration assembly described above largely fulfills the object of thepresent invention, overcoming the typical problems of the prior art.[000130] Advantageously, in fact, the engagement operations between the filtering cartridge and the filter body are guided and error-proof.[000131] Advantageously, the filtering cartridge and the filter body is integrally engagable only following a first guided axial insertion action and a subsequent rotation .[000132] Advantageously, the mutual rotation between the filtering cartridge and the filter body is performable indiscriminately in a clockwise and counterclockwise direction.[000133] Advantageously, in fact, the engagement operations between the filtering cartridge and the filter body are guided and error-proof.[000134] Advantageously, the filtering cartridge and the filter body is disengageable by a single axial extraction action.[000135] Advantageously, the locking groups are designed to operate both with body members that are positioned radially internally and to operate with body members that are positioned radially externally.[000136] Advantageously, the engaging and disengaging operations of the filter body-filter cartridge areextremely simplified and intuitive.[000137] Advantageously, in the engagement configuration the engagement / disengagement means ensure axial positioning of the two components that is fixed and secure and maintained over time.[000138] Advantageously, the axial locking action performed by the respective teeth is performed effectively and reliably.[000139] Advantageously, the locking group has a shaft base and a head portion positioned upon respective circumferences of different radii, exploiting the head portion in order to more effectively force the bending of the tooth.[000140] Advantageously, the locking group has a shaft base and a head portion positioned upon respective circumferences of different radii, exploiting the head portion to more effectively force the bending of the tooth, reducing the force necessary to elastically bend the locking group and reducing the force necessary to engage the coupling of the cartridge with the filter body .[000141] Advantageously, the locking group has a shaft base and a head portion positioned upon respective circumferences of different radii, exploiting the head portion in order to more effectively force the bendingof the tooth, reducing the force necessary to elastically bend the locking group and reducing the risk of unwanted breakage of the filtering cartridge and / or components of the assembly.[000142] Advantageously, the position of the head portion upon a circumference of a different radius with respect to the shaft base allows the head of the locking group to be exploited in order to objectify the angular position of the cartridge, eliminating the need to provide further ob ectification elements upon the filtering cartridge.[000143] Advantageously, the position of the head portion on a circumference of a different radius with respect to the shaft base allows the head of the locking group to be exploited in order to objectify the angular position of the cartridge, limit the axial dimensions of the body members and increase the internal surfaces available for engagement with any sealing elements (ribs and / or gaskets) comprised upon the filtering cartridge.[000144] Advantageously, the position of the head portion upon a circumference of a different radius with respect to the shaft base allows the head of the locking group to be exploited in order to objectify the angular position of the cartridge, limit the axialdimensions of the body members , increase the internal surfaces available for engagement with any sealing elements ( ribs and / or gaskets ) and manage with greater flexibility the dimensioning of the hermetic connections of the filtering cartridge with the filter body, such as , for example , the dimensioning of any sealing elements oriented radial ly outwards .[ 000145 ] Advantageously, the presence of circumferential ramps makes it possible to reliably guide the sliding of each locking group towards the respective housing thereby reducing the intensity of any stresses trans ferred to the filtering cartridge .[ 000146 ] Advantageously, the geometry of the coupling system is simpl i fied, simpli fying the si zing o f the teeth and the respective seats thereof and advantageously minimi zing the complexity of the molds used for the production of the engagement / disengagement means and the related costs .[ 000147 ] Advantageously, the installation on filter bodies of filtering cartridges not provided with locking groups such as those described is prevented . In other words , it is not possible to use cartridges in the filtering group, for example traditional cartridges , ensuring, for example during maintenance operations , that quality filtering cartridges are used,as guaranteed by the manufacturer.[000148] Advantageously, the engagement / disengagement means have a reduced axial footprint allowing for maximization of the filtering surface of the filtering septum thereby meeting the needs of the specific filtration group.[000149] Advantageously, the engagement means have a reduced radial footprint and are foreseeable both on filtering cartridges affected by radial flow and on filtering cartridges affected by axial flow.[000150] Advantageously, the filter body directly engages the filtering cartridge.[000151] Advantageously, the engagement between the filtering cartridge and the filter body is adoptable for both filtering devices in which the axis is oriented vertically, is oriented horizontally or is inclined with respect to the ground, in the conditions of use thereof.[000152] It is clear that a person skilled in the art, in order to satisfy contingent needs, could make modifications to the filtering cartridge, to the filter body, to the fluid filtering group or to the assembly method, which modifications are all contained within the scope of protection as defined in the following claims .List of reference numbers :[ 000153 ]1 filtering cartridge10 end plate110 filtering medium120 water separator150 slit2 filter body20 cup body201 side walls202 central collar21 cap body200 filtration chamber280 water collection chamber3 engagement / disengagement means4 cartridge members40 locking group41 shaft410 shaft base42 head420 head teeth421 inclined cartridge edge43 cartridge undercut5 body members50 axial guide51 circumferential ramp511 first axial edge512 second axial edge52 housing521 inclined body edge53 body undercut900 filtration assemblyX-X main axis rl first radius r2 second radiusPl first planar segmentP2 second planar segmentPI connection segmentRxl first fittingRx2 second fittingCl first imaginary circumferenceC2 second imaginary circumferenceRcl first imaginary circumference radiusRc2 second imaginary circumference radius

Claims

CLAIMS1. A fluid filtration assembly (900) , preferably of a vehicle, extending along an axis (X-X) and comprising: i) a filtering cartridge (1) ; ii) a filter body (2) suitable for engaging the filtering cartridge (1) , preferably comprising a filtration chamber (200) in which the filtering cartridge (1) is housed; ii) engagement / disengagement means (3) comprising cartridge members (4) comprised in the filtering cartridge (1) and body members (5) comprises in the filter body (2) , specially shaped to be configurable in an engagement configuration by means of a mutual first insertion action axial followed by a mutual second action rotational, in clockwise or counterclockwise direction, and in a disengagement configuration by means of a mutual axial extraction action, respectively; wherein the filtering cartridge (1) comprises, at an axial end, an end plate (10) , wherein said cartridge members (4) are positioned on the end plate (10) , which cartridge members (4) comprise at least two locking groups (40) comprising a shaft (41) and a head (42) positioned at the axial end of the shaft (41) protruding therefrom in a lateral direction, i.e.,circumferentially or tangentially, or in a radial direction, defining with the shaft (41) at least one cartridge undercut (43) ; wherein the body members (5) are suitable for cooperating with said end plate (10) comprising: at least two axial guides (50) in which the two locking groups (40) slide upon the first insertion action axial, respectively; at least two housings (52) in which, in the engagement configuration, the locking groups (40) are housed, wherein each housing (52) is specially shaped complementarily to the head (42) , defining at least one body undercut (53) , to retain it in the engagement configuration and to allow it to be disengaged by means of the axial extraction action;- at least two circumferential ramps (51) , wherein each circumferential ramp (51) extends angularly from an axial guide (50) with a first axial edge (511) positioned at a first radius (rl) , proximal to the axial guide (50) , up to a second axial edge (512) proximal, in particular facing, a housing (52) positioned at a second radius (r2) , different from the first radius (rl) , so that upon the rotational action, the respective locking group (40) yields elastically in the radial direction, sliding on the circumferentialramp ( 51 ) .

2. Filtration assembly (900) according to claim 1, wherein the locking group (40) , rotatably moving past the second axial edge (512) , snaps and positions the head (42) in the respective housing (52) .

3. Filtration assembly (900) according to any one of the preceding claims, wherein the locking group (40) is T-shaped and the head (42) comprises two head teeth (420) extending in the lateral direction from the shaft (41) , defining two cartridge undercuts (43) .

4. Filtration assembly (900) according to any one of the preceding claims, wherein the head (42) , preferably the head teeth (420) , has a tapered shape since it becomes thinner distally from the shaft (41) .

5. Filtration assembly (900) according to any one of the preceding claims, wherein the shaft (41) has a shape such that head (42) and shaft base (410) lie on two imaginary circumferences (Cl; C2) with respective different radii (RC1, RC2) .

6. Filtration assembly (900) according to claim 5, wherein the shaft (41) comprises a first planar segment (Pl) comprising the shaft base (410) and lying on a first imaginary circumference (Cl) , a second planar segment (P2) comprising the head (42) and lying on a second imaginary circumference (C2) , and a connectionsegment (PI) joining the first planar segment (Pl) and the second planar segment (P2) .

7. Filtration assembly (900) according to any one of the preceding claims, wherein the head (42) comprises one, preferably two, inclined cartridge edge (421) facing the cartridge undercut (43) , and the housing (52) comprises one, preferably two, inclined body edge (521) facing the body undercut (53) .

8. Filtration assembly (900) according to claim 7, wherein the inclined body edge (521) , preferably the inclined body edges (521) , extends from the second axial edge (512) .

9. Filtration assembly (900) according to any one of the preceding claims, wherein the body members (5) , preferably at each circumferential ramp (51) , comprise a step (510) suitable for providing an abutment to the end plate (10) upon the first insertion action axial.

10. Filtration assembly (900) according to claim 9, wherein each step (510) extends over an angular segment into the housing (52) .

11. Filtration assembly (900) according to any one of the preceding claims, wherein the filtering cartridge (1) comprises filtering medium (110) coalescent, with annular shape, and a hydrophobic separator (120) suitable for performing the separation from water.

12. Filtration assembly (900) according to any one of the preceding claims, wherein the cartridge members (4) comprise three or four locking groups (40) angularly equally spaced apart.

13. Filtration assembly (900) according to any one of the preceding claims, wherein the filter body (2) comprises a cap body (21) and a cup body (20) , wherein the mutual engagement, preferably along the axis (X-X) , defines the filtration chamber (200) , wherein the body members (5) are positioned at the bottom of the cup body (20) .

14. Filtration assembly (900) according to any one of the preceding claims, wherein the filter body (2) comprises a cap body (21) and a cup body (20) , wherein the mutual engagement, preferably along the axis (X-X) , defines the filtration chamber (200) , and the cartridge comprises a radial element which engages the filter body to delimit a water collection chamber (280) , wherein the body members (5) are positioned at the bottom of the cup body (20) , i.e., inside the water collection chamber (280) .

15. Filtration assembly (900) according to claim 14 in combination with claim 11, wherein the cartridge (1) , preferably the end plate (10) , comprises at least one slit (150) through which the water separated by thehydrophobic separator (120) flows towards the water collection chamber (280) .

16. Filtration assembly (900) according to any one of claims 13 to 15, wherein the cup body (20) comprises side walls (201) on which said body members (5) are obtained .

17. Filtration assembly (900) according to any one of claims 13 to 15, wherein the cup body (20) comprises a central collar (202) on which said body members (5) are obtained.

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