CN110575692B

CN110575692B - Filter element, fluid filter assembly and assembling method thereof

Info

Publication number: CN110575692B
Application number: CN201810578017.3A
Authority: CN
Inventors: 乔基奥·基隆迪
Original assignee: UFI Filters SpA
Current assignee: UFI Filters SpA
Priority date: 2018-06-05
Filing date: 2018-06-05
Publication date: 2022-05-24
Anticipated expiration: 2038-06-05
Also published as: CN110575692A

Abstract

The invention relates to a filter cartridge (1) of a fluid filter assembly (10). The filter assembly (10) comprises a cup body (11) and a cover body (12), wherein the cup body (11) comprises a first annular body (111), the cover body (12) comprises a second annular body (121), and the first annular body and the second annular body (111, 121) are suitable for mutually engaging in a relative rotation process. The cup (11) has a filter chamber (110), the filter chamber (110) being accessible via an oil inlet mouth (110') peripherally defined by a first annular body (111), the cover (12) having at least one groove (125) on a second annular body (121). The filter cartridge (1) is receivable within the bowl (11) and includes a filter media (2) and an endplate (3) adapted to engage the first annular body (111). The filter element (1) can be meshed with the cup body (11) along the axial direction through the active locking piece (31). The filter cartridge (1) comprises an anti-rotation element (32) extending radially from the end plate (3) and adapted to be received in the groove (125).

Description

Filter element, fluid filter assembly and assembling method thereof

Technical Field

The present invention relates to a filter cartridge for a fluid filter assembly. Furthermore, the invention also relates to the fluid filter assembly comprising the filter element. Furthermore, the invention relates to a method for assembling said assembly.

The invention is preferably used in the automotive field. In particular, the background to which the invention is directed is fluid filter assemblies, in particular vehicle fuel filter assemblies, preferably diesel filter assemblies.

Background

In the prior art, filter assemblies comprising a cup (or tub) and a lid (or head) integrally joined to each other are generally known. The cup and lid being specially shaped to house the filter cartridge inside; the cup and cap are particularly adapted for fluid connection with a fuel circulation system. As a result, fuel to be filtered (dirty fuel) enters the fluid filter assembly and, after passing through the filter element, filtered fuel (clean fuel) exits.

The main drawback of the known filter assembly is the complexity of the joining method between the aforementioned parts.

The assembly and disassembly of such fluid filter assemblies is particularly complicated by the complexity of the joining method between the components. This drawback is therefore strongly felt to negatively affect the maintenance operations of the filtering assembly, and in particular the replacement of the filtering cartridge.

Disclosure of Invention

Accordingly, there is a strong felt need to provide a filter cartridge of a filter assembly, and a fluid filter assembly comprising the same, which are capable of overcoming the above-mentioned drawbacks, so as to make maintenance operations simple.

The invention aims to provide a filter element and a filter assembly, which can provide a simple jointing method between different components and can realize simple assembling and disassembling operations.

Drawings

Further characteristics and advantages of the invention will in any case become apparent from the following description of a preferred embodiment, given by way of non-limiting example with reference to the accompanying drawings, in which:

FIG. 1 shows a filter cartridge of a fluid filter assembly according to a preferred embodiment of the present invention;

fig. 2-5 illustrate some assembly steps of a fluid filter assembly including the filter cartridge of fig. 1 according to the present invention;

figures 2a and 3a show two longitudinal sections of the assembly shown in figures 2 and 3;

fig. 6a and 6b show some cross-sections of a fluid filter assembly in its intermediate and completed assembled bodies, respectively;

fig. 6c and 6d show two enlarged views of the fluid filter assembly in its assembled finished body, respectively along two cross-sections lying on two different axial planes.

Reference numerals:

1, a filter element; an X-X cartridge axis; 2a filter medium; 3, end plates; 31 an active catch member; 31' a first portion; 31 "second portion; 310, locking teeth; 315 engage the teeth; 32 an anti-rotation member; 321 surfaces for sliding clockwise; 322 for sliding counterclockwise; 38 an annular mouth; 39 oil inlet; 4, a bottom plate; 5 a tubular member; 58 into the oil jet; 10 a filter assembly; a Y-Y principal axis; 11, a cup body; 110 a filter chamber; 110' oil inlet mouth; 111 a first ring-shaped body; 113 a passive catch member; 1130 a locking cavity; 1131 a first circumferential end; 1132 second circumferential end; 12 a cover body; 121 a second annular body; 125 grooves; 126 groove edge; 500 filtration module

Detailed Description

In the accompanying drawings, reference numeral 1 denotes a filter cartridge according to a preferred embodiment of the present invention, and reference numeral 10 denotes a fluid filter assembly according to a preferred embodiment of the present invention, which includes the filter cartridge 1.

According to the invention, along and around the main axis Y-Y, the fluid filter assembly 10 extends, the filter cartridge 1 being adapted to form part of the fluid filter assembly 10.

Fluid filter assembly 10 includes a cup 11 and a cap 12, with cup 11 and cap 12 being adapted to engage one another.

Specifically, cup 11 and lid 12 comprise, peripherally, a first ring 111 (or inner ring) and a second ring 121 (or outer ring), respectively, first ring 111 and second ring 121 being specifically shaped to engage each other. Wherein the first ring 111 is radially closer to the main axis Y-Y than the second ring 121. In other words, in the assembled body, the second ring body 121 surrounds the first ring body 111.

Preferably, the first and second

annular bodies

111 and 121 have a substantially annular shape. According to the preferred embodiment, the first ring 111 and the second ring 121 are concentric, with their centers on the main axis Y-Y.

According to a preferred embodiment, the first annular body 111 and the second annular body 121 are adapted to effect engagement of the cup 11 and the lid 12 by a relative rotational action.

Preferably, the first and

second rings

111, 121 comprise an engagement system, such as a snap system or a screw system, provided on the first and second rings 111, 121 (respectively on the walls facing each other). In other words, the various "inter-coupled" components of the engagement system (depending on the embodiment chosen) are located on the first ring 111 and the second ring 121.

For example, in one preferred embodiment, the engagement system has a snap-fastening structure comprising:

a fixing element extending radially outside the first annular body 111; and

an engagement member extending radially inside the second ring-shaped body 121.

Preferably, the fixing member has a polygonal shape, and the engaging member is adapted to engage with the fixing member by means of relative rotation. In other words, in this embodiment, the engagement member is adapted to engage and receive the fixing member therein by a relative rotational action.

Still alternatively, in a preferred embodiment, said engagement system is a threaded system, the outer side of the first ring 111 having a first thread and the inner side of the second ring 121 having a second thread reciprocally coupled with said first thread.

According to the invention, whatever the type of engagement system between the cup 11 and the lid 12, in particular the second annular body 121, comprises at least one groove 125, said at least one groove 125 facing inwards.

Said groove 125 extends parallel to the main axis Y-Y and is delimited in the transverse direction by a groove rim 126 having an axial extension. Preferably, the slot edges 126 extend parallel to each other. The purpose and function of the groove 125 and the respective groove edges 126 will be explained more fully below and will be shown in the drawings by way of example.

According to a preferred embodiment, cup 11 has a filter chamber 110, filter chamber 110 being accessible through an oil inlet mouth 110' peripherally defined by a first annular body 111. The filter cartridge 1 is at least partially housed inside said filter chamber 110.

According to a preferred embodiment, cap 12 is adapted to be fluidly connected to a fuel circulation circuit and to be fluidly connected to bowl 11 (preferably via cartridge 1).

The filter cartridge 1 is adapted to be at least partially housed inside the cup 11, in particular inside the filter chamber 110.

The way in which the cup 11 is engaged with the cover 12 in the configuration in which the cartridge 1 is inserted is not different in any way from the one described above. In other words, the presence of cartridge 1 does not change the way in which the engagement systems provided between cup 11 and cover 12 engage each other.

According to the invention, the filter cartridge 1 comprises, in fact, a cartridge axis X-X, along which said filter cartridge 1 extends. The filter cartridge 1 comprises a filter medium 2, the filter medium 2 extending along a cartridge axis X-X and being adapted to be received in the filter chamber 110.

Preferably, the filter medium 2 is of a tube type, the fluid being able to pass through the filter medium 2 from the outside to the inside in a radial direction.

Preferably, the filter medium 2 is of the type comprising pleats.

In addition, as shown in FIG. 2a, the filter cartridge 1 further includes an endplate 3, the endplate 3 being located at one axial end of the filter media 2 along the cartridge axis X-X. Preferably, the end plate 3 has at least one opening 39, the opening 39 being defined by an annular mouth 38 in the circumferential direction, the fluid to be filtered and the filtered fluid being fed and/or fed through the opening 39. According to a preferred embodiment, said opening 39 is centrally located at the end plate 3, with its centre lying on the cartridge axis X-X.

Preferably, the filter cartridge 1 further comprises a bottom plate 4, the bottom plate 4 being located at the opposite end of the end plate 3.

According to a preferred embodiment, the filter cartridge 1 further comprises a tubular member 5, the tubular member 5 extending along the cartridge axis X-X from the bottom plate 4 to the end plate 3, inside the filter medium 2. Preferably, the tubular member 5 extends through the opening 39 and has an oil inlet nozzle 58.

In other words, the end plate 3, the bottom plate 4 and the tubular member 5 define an area through which the dirty fluid and the clean fluid obtained by passing through the filter flow. Fig. 3a shows by way of example the direction of flow of a liquid through a filter cartridge 1 according to one preferred embodiment described above.

According to the invention, the end plate 3 is particularly adapted to engage with the first ring-shaped body 111. In particular, the end plate 3 is adapted to close the oil inlet mouth 110' so that the fuel flows only into the opening 39 provided on the end plate 3.

In particular, in practice, as shown in fig. 2 and 3, the end plate 3 comprises at least one active catch member 31, the active catch member 31 being adapted to lock the cartridge 1 to the cup 11.

Each of said active catch members 31 comprises at least one catch tooth 310, the catch tooth 310 being adapted to engage with the cup 11 during axial insertion of the cartridge 1 into said cup 11.

In other words, the cartridge 1 can be secured to the bowl 11 by the active catch member 31 to form a single filter module 500.

According to a preferred embodiment, the active catch member 31 includes a first portion 31 ' and a second portion 31 ", the first portion 31 ' extending radially from the end plate 3 (radially with respect to the cartridge axis X-X), and the second portion 31" extending axially from the first portion 31 ' (i.e., parallel to the cartridge axis X-X). Preferably, said at least one latching tooth 310 is arranged at said second portion 31 ", thereby providing a radial elasticity.

That is, the active catch member 31 is a substantially L-shaped element.

According to a preferred embodiment, each active catch member 31 includes a plurality of catch teeth 310.

In particular, cup 11, and in particular first loop 111, includes at least one passive catch member 113, each of the at least one passive catch members 113 being adapted to mate with a corresponding one of the at least one active catch member 31. Wherein the passive catch member 113 extends radially outwardly (radially with respect to the main axis Y-Y) while extending in a circumferential direction to form a circumferential portion (circumferentially with respect to the main axis Y-Y). The passive locking member 113 is preferably disposed on the outer wall of the first ring body 111.

In other words, the passive catch member 113 forms an engagement structure for engagement with the active catch member 31, on which the active catch member 31 is adapted to act, thereby performing a latching action.

Preferably, each passive latch member 113 has at least one latch cavity 1130, each of the at least one latch cavities 1130 being engageable by a corresponding one of the at least one latch teeth 310.

Preferably, each passive catch member 113 includes two catch cavities 1130.

Furthermore, in accordance with a preferred embodiment, as seen in fig. 2-4, passive catch member 113 extends between a first circumferential end 1131 and a second circumferential end 1132, the first circumferential end 1131 and the second circumferential end 1132 being disposed circumferentially spaced from one another and having a thickness extending axially along the primary axis Y-Y. According to the preferred embodiment, each active catch member 31 includes at least one engagement tooth 315, each engagement tooth 315 being adapted to engage either the first circumferential end 1131 or the second circumferential end 1132, such that the active catch member 31 is circumferentially positioned relative to and axially aligned with the passive catch member 113.

From the above description, it is apparent that active catch member 31 and passive catch member 113 are specifically shaped to mate with each other.

For example, in one preferred embodiment, the cartridge 1 includes a plurality of active catch members 31, preferably three active catch members 31. Preferably, the number of active catch members 31 corresponds to the number of passive catch members 113.

According to the preferred embodiment, the plurality of active catch members 31 are angularly spaced in an irregular manner so that they are not equiangularly arranged (and therefore, the passive catch members 113 are also arranged in the same manner).

Furthermore, according to the invention, the end plate 3 also comprises at least one anti-rotation element 32, the anti-rotation element 32 extending radially from the end plate 3.

Preferably, the anti-rotation member 32 is adapted to engage the cover 12 in a circumferential direction to prevent relative rotation between the filter module 500 and the cover 12.

According to the invention, in particular, the anti-rotation element 32 is adapted to be housed inside the groove 125 of the second ring-shaped body 121. Preferably, the anti-rotation element 32 is therefore adapted to prevent relative rotation between the filter module 500 and the cover 12 by abutting against the groove rim 126 laterally delimiting said groove 125.

According to the invention, each anti-rotation element 32 comprises, in particular, an end and/or a tip suitable to be housed inside the groove 125 of the second annular body 121. Preferably, said tip interacts with the groove edges 126 defining the groove 125 to perform an end blocking action when passing one of the groove edges 126. Preferably, the end blocking action is performed when the end of active catch member 31 passes the notch edge 126.

According to a preferred embodiment, the anti-rotation element 32 is adapted to interfere with the groove 125, in particular with the groove edge 126. That is, the anti-rotation member 32 geometrically matches the slot 125. Preferably, the anti-rotation members 32 are interengaged with the slots 125 by a form fit.

In other words, the rotation preventing member 32 performs an end stop action.

According to a preferred embodiment, the anti-rotation element 32 extends from the end plate 3 integrally with the end plate 3.

Preferably, the anti-rotation member 32 extends radially and is wedge-shaped.

Preferably, in a further preferred embodiment, the anti-rotation element 32 is made in the shape of a lug hinged on the end plate 3, the axis of rotation of which is parallel to the axis X-X of the filter cartridge. According to the preferred embodiment, the rotation preventing member 32 is elastically bent, specifically, in a radial direction, when engaged with the cap body 12.

Because the distal end of the anti-rotation member 32 is wedge-shaped, the anti-rotation member 32 is able to urge itself into engagement with the rim 126 of the groove 125 during relative rotation between the filter module 500 and the cover 12. This facilitates the reception of the rotation preventing member 32, and thus the reception of the rotation preventing member 32 in the groove 125.

According to a preferred embodiment, as shown in fig. 6c, the rotation-preventing piece 32 comprises a surface 321 for clockwise sliding and a surface 322 for counter-clockwise sliding.

Preferably, the surfaces 321 and 322 are thus adapted to engage with the respective groove edges 126.

Also, according to a preferred embodiment, the end plate 3 includes a plurality of anti-rotation elements 32, preferably corresponding to the number of slots 125 made in the cover 12.

According to a preferred embodiment, three anti-rotation elements 32 are provided, said three anti-rotation elements 32 being adapted to be received in three specially shaped grooves 125.

According to a preferred embodiment, the anti-rotation elements 32 have different shapes from each other, depending on the shape and size of the grooves they have to fit into.

It is important to note that, in accordance with the present invention, the active catch member 31 and the anti-rotation member 32 are two separate elements and are angularly spaced from one another. By "independent of one another" it is meant that the active catch part 31 and the anti-rotation part 32 are not integral but separate from one another, and are provided as two separate elements, each separately on the end plate 3.

In general, the structure of the active catch member 31 is such that it can act both axially and radially; and the rotation preventing member 32 is constructed to be able to act clockwise or counterclockwise in the circumferential direction.

The present invention also relates to a method of assembling a fluid filter assembly 10 having the above-described features.

The assembly method comprises the following steps:

inserting cartridge 1 axially into cup 11 until at least one catch tooth 310 of cartridge 1 latches with cup 11, so as to obtain filtration module 500;

the action of rotating the filter module 500 and the lid 12 relative to each other, so as to engage the lid 12 with the cup 11 and to receive the at least one antirotation element 32 in the corresponding groove 125.

In other words, the assembly method distinguishes the following two clearly defined independent operations: i.e. a first action between cup 11 and cartridge 1 in the axial direction, in which cartridge axis X-X is aligned with main axis Y-Y, and an action of axial approach is carried out until the active catch engages the passive catch; and a second rotation action between filter module 500 and lid 12, which involves the mutual engagement of cup 11 and lid 12, by means of an engagement system provided on each ring, which is ended when anti-rotation element 32 is housed in respective slot 125.

The filter element and the fluid filter assembly described above are innovative to fully achieve the objects of the present invention and overcome the typical drawbacks of the prior art. The assembly method of the filter assembly can fully achieve the aim of the invention and overcome the typical defects in the prior art.

Advantageously, in practice, the maintenance operations of the filtering assembly can be simplified: advantageously, the opening of the filter assembly can be realized only by the relative rotation of the filter assembly and the cover body; the effect of the rotation prevention member can be overcome only by rotating, so that the assembly is opened, and the filter element can be contacted.

Advantageously, the filter cartridge has a special part (catch element) which cooperates exclusively with the cup and a special part (anti-rotation element) which cooperates exclusively with the cover. Advantageously, the former particular component (catch element) is adapted to operate in an axial direction and the latter particular component (anti-rotation element) is adapted to operate in a clockwise or anti-clockwise direction.

Also, advantageously, the anti-rotation member is adapted to provide an abutment action adapted to provide feedback to the operator during the assembly and disassembly operations.

Advantageously, the plurality of locking elements and/or the plurality of anti-rotation elements make it possible to keep the system safe in the event of damage, for example, to one of the components.

Innovatively, it is evident that the assembly method (and conversely the disassembly method) can provide a simple, intuitive operation that can be repeated over a long period of time.

It is clear that a person skilled in the art can modify the cartridge or the production method described above to meet contingent needs, all of which are included within the scope of protection defined by the following claims.

Claims

1. A filter cartridge (1) of a fluid filter assembly (10), said fluid filter assembly (10) extending along a main axis Y-Y and comprising a cup (11) and a cap (12), said cup (11) and said cap (12) comprising peripherally a first ring (111) and a second ring (121), respectively, said first ring (111) and said second ring (121) being mutually engaged by a relative rotational movement;

wherein the cup body (11) has a filter chamber (110), the filter chamber (110) being accessible via an oil inlet nipple (110') defined by the first annular body (111) in the peripheral direction;

wherein the cap (12) has at least one groove (125) in the second annular body (121), said at least one groove (125) facing inwards and extending parallel to the main axis Y-Y and being laterally defined by a groove rim (126) having an axial extension;

the filter cartridge (1) comprises a cartridge axis X-X along which it extends and comprises:

i) a filter medium (2) extending along a filter element axis X-X and adapted to be received within the filter chamber (110);

ii) an end plate (3) at one axial end of the filter media (2) along the filter cartridge axis X-X and adapted to engage with the first annular body (111), the end plate (3) comprising:

-at least one active catch piece (31) adapted to lock the cartridge (1) on the cup (11) to constitute a single filtration module (500), wherein the active catch piece (31) comprises at least one catch tooth (310), the at least one catch tooth (310) being adapted to engage with the cup (11) during axial insertion of the cartridge (1) into the cup (11); and

-at least one anti-rotation element (32) extending radially from the end plate (3) for being housed in the groove (125) of the second annular body (121) and for preventing relative rotation between the filter module (500) and the cover (12) by abutting against the groove rim (126).

2. Cartridge (1) according to claim 1, wherein the active catch member (31) comprises a first portion (31 ') and a second portion (31 "), the first portion (31 ') extending radially from the end plate (3) and the second portion (31") extending axially from the first portion (31 '), wherein the at least one catch tooth (310) is provided at the second portion (31 ") so as to provide a radial elasticity.

3. The filter cartridge (1) of any one of the preceding claims, wherein the cup (11) of the fluid filter assembly (10) comprises at least one passive catch member (113) on the first ring body (111), each of the at least one passive catch member (113) being adapted to cooperate with a corresponding one of the at least one active catch member (31), wherein the passive catch member (113) extends radially outward while extending in a circumferential direction forming a circumferential portion, wherein each passive catch member (113) has at least one catch cavity (1130), each of the at least one catch cavities (1130) being engageable by a corresponding one of the at least one catch teeth (310).

4. The cartridge (1) of claim 3, wherein each passive catch member (113) comprises two of said catch cavities (1130) and the active catch member (31) corresponding to the passive catch member (113) comprises two of said catch teeth (310), each of said catch teeth (310) being adapted to engage with a corresponding one of said two catch cavities (1130).

5. The filter cartridge (1) of claim 3, wherein the passive catch member (113) extends between a first circumferential end (1131) and a second circumferential end (1132), the first and second circumferential ends (1131, 1132) being circumferentially spaced from one another and having a thickness extending axially along the main axis Y-Y, wherein the active catch member (31) includes at least one engagement tooth (315), each engagement tooth (315) being adapted to engage with either the first circumferential end (1131) or the second circumferential end (1132) to position the active catch member (31) and the passive catch member (113) relative to the circumferential direction and axially align.

6. Filter cartridge (1) according to claim 1, wherein the rotation-preventing element (32) extends radially from the end plate (3) integrally with the end plate (3) and is wedge-shaped so as to promote its reception in the groove (125) during the relative rotation of the filter module (500) and the cover (12).

7. Cartridge (1) according to claim 6, wherein the anti-rotation element (32) comprises a surface (321) for clockwise sliding and a surface (322) for anticlockwise sliding.

8. Cartridge (1) according to claim 1, characterized by comprising a plurality of said active catch members (31).

9. Cartridge (1) according to claim 8, wherein a plurality of said active catch members (31) are angularly spaced in an irregular manner so that they are not arranged at equal angles.

10. Cartridge (1) according to claim 1, comprising a plurality of said anti-rotation elements (32).

11. The filter cartridge (1) of claim 1, wherein the active locking piece (31) and the rotation prevention piece (32) are two mutually independent elements and are arranged at an angular distance from one another.

12. A fluid filter assembly (10) extending along a main axis Y-Y and comprising a cup (11) and a cap (12), said cup (11) and said cap (12) comprising peripherally a first annular body (111) and a second annular body (121), respectively, said first annular body (111) and said second annular body (121) being mutually engaged by a relative rotation action;

wherein the cup body (11) has a filter chamber (110), the filter chamber (110) being accessible via an oil inlet mouth (110') defined in the peripheral direction by the first ring-shaped body (111);

the fluid filter assembly (10) further comprises a filter cartridge (1) according to claim 1.

13. The fluid filter assembly (10) of claim 12, wherein the active catch member (31) comprises a first portion (31 ') and a second portion (31 "), the first portion (31 ') extending radially from the end plate (3) and the second portion (31") extending axially from the first portion (31 '), wherein the at least one catch tooth (310) is provided in the second portion (31 ") so as to provide radial resilience.

14. The fluid filter assembly (10) of claim 12 or 13, wherein the cup (11) of the fluid filter assembly (10) comprises at least one passive catch member (113) on the first annular body (111), each of the at least one passive catch member (113) being adapted to cooperate with a corresponding one of the at least one active catch member (31), wherein the passive catch member (113) extends radially outward while forming a circumferential portion along a circumferential direction, wherein each of the passive catch members (113) has at least one catch cavity (1130), each of the at least one catch cavities (1130) being engageable by a corresponding one of the at least one catch teeth (310).

15. The fluid filter assembly (10) of claim 14 wherein each said passive catch member (113) includes two said catch cavities (1130) and said active catch member (31) corresponding to said passive catch member (113) includes two said catch teeth (310), each said catch tooth (310) being adapted to engage a corresponding one of said two catch cavities (1130).

16. The fluid filter assembly (10) of claim 14 wherein said passive catch member (113) extends between a first circumferential end (1131) and a second circumferential end (1132), said first and second circumferential ends (1131, 1132) being circumferentially spaced from one another and having a thickness extending axially along a major axis Y-Y, wherein said active catch member (31) includes at least one engagement tooth (315), each engagement tooth (315) being adapted to engage either said first circumferential end (1131) or said second circumferential end (1132) to position said active catch member (31) and said passive catch member (113) relative to a circumferential direction and in axial alignment.

17. The fluid filter assembly (10) of claim 14, including a plurality of said passive catch members (113), said plurality of said passive catch members (113) being angularly spaced in an irregular manner such that they are not equiangularly aligned.

18. The fluid filter assembly (10) of claim 17 wherein the slots (125) provided in the second ring (121) of the cover (12) are defined by slot edges (126), the slot edges (126) being angularly spaced from one another and extending radially from an inner side of the second ring (121) toward a center of the cover (12).

19. Fluid filter assembly (10) according to claim 12, wherein said first annular body (111) comprises on its outside and said second annular body (121) comprises on its inside mutually coupled mutual engagement systems, respectively, which perform the mutual engagement between said cup (11) and said cover (12) by means of a relative rotation action.

20. A method of assembling a fluid filter assembly (10) according to any one of claims 12 to 19, comprising the steps of:

axially inserting the filter cartridge (1) into the cup (11) until the at least one latching tooth (310) of the filter cartridge (1) latches with the cup (11), thereby obtaining a filter module (500);

-the action of rotating the filter module (500) and the cover (12) relative to each other, so as to engage the cover (12) with the cup (11) and to receive the at least one anti-rotation element (32) in the corresponding groove (125).