FILTER MODULE

Abstract

A filter module is disclosed. The filter module includes a pump with a pump housing and a filter device with a filter housing. A first thread is arranged on the pump housing, and a second thread configured complementary to the first thread is arranged on the filter housing, so that the pump is able to be screwed via the pump housing to the filter housing of the filter device. The pump housing includes a housing cover, a middle part and a lower part. The housing cover is screwed to the middle part and the middle part is screwed to the lower part.

Claims

1-11. (canceled)

12. A filter module, comprising: a pump including a pump housing; a filter device including a filter housing; a first thread arranged on the pump housing, and a second thread configured complementary to the first thread arranged on the filter housing, so that the pump is able to be screwed via the pump housing to the filter housing of the filter device; wherein the pump housing further includes a housing cover, a middle part and a lower part, and wherein the housing cover is screwed to the middle part and the middle part is screwed to the lower part.

13. The filter module according to claim 12, wherein the first thread is an external thread and the second thread is an internal thread.

14. The filter module according to claim 12, wherein at least one of: the first thread is configured in one piece with the lower part, and the second thread is configured in one piece with the filter housing.

15. The filter module according to claim 12, wherein the middle part and the lower part surround a motor compartment, and wherein an electric motor with a rotor is arranged in the motor compartment.

16. The filter module according to claim 12, wherein on the lower part an outwardly open annular groove is arranged, and wherein a sealing ring is arranged in the outwardly open annular groove.

17. The filter module according to claim 12, wherein: on the lower part a depth stop structured as an annular step is arranged, and on the filter housing, an axial stop configured complementary to the depth stop is arranged, on which the lower part lies in correctly installed state.

18. The filter module according to claim 12, wherein the filter housing and the lower part delimit a pump chamber, and wherein a pump wheel is arranged in the pump chamber.

19. The filter module according to claim 12, wherein the housing cover and the middle part delimit a control chamber, and wherein an electronic control of the pump is arranged in the control chamber.

20. The filter module according to claim 12, wherein the middle part has an axial first annular flange, via which the middle part is pushed into a second annular flange of the lower part that is configured complementary to the first annular flange, wherein an O-ring seal is arranged between the first annular flange and the second annular flange.

21. The filter module according to claim 12, wherein at least one of: the filter module is configured as an oil filter module, and the first thread and the second thread are configured as a left-hand thread.

22. The filter module according to claim 13, wherein the first thread is configured in one piece with the lower part.

23. The filter module according to claim 13, wherein the second thread is configured in one piece with the filter housing.

24. The filter module according to claim 14, wherein the middle part and the lower part surround a motor compartment, and wherein an electric motor with a rotor is arranged in the motor compartment.

25. The filter module according to claim 15, wherein on the lower part an outwardly open annular groove is arranged, and wherein a sealing ring is arranged in the outwardly open annular groove.

26. The filter module according to claim 15, wherein the filter housing and the lower part delimit a pump chamber, and wherein a pump wheel is arranged in the pump chamber.

27. The filter module according to claim 15, wherein the housing cover and the middle part delimit a control chamber, and wherein an electronic control of the pump is arranged in the control chamber.

28. The filter module according to claim 16, wherein: on the lower part a depth stop structured as an annular step is arranged, and on the filter housing, an axial stop configured complementary to the depth stop is arranged, on which the lower part lies in correctly installed state.

29. The filter module according to claim 28, wherein the middle part has an axial first annular flange, via which the middle part is pushed into a second annular flange of the lower part that is configured complementary to the first annular flange, wherein an O-ring seal is arranged between the first annular flange and the second annular flange.

30. The filter module according to claim 16, wherein the middle part has an axial first annular flange, via which the middle part is pushed into a second annular flange of the lower part that is configured complementary to the first annular flange, wherein an O-ring seal is arranged between the first annular flange and the second annular flange.

31. The filter module according to claim 18, wherein the housing cover and the middle part delimit a control chamber, and wherein an electronic control of the pump is arranged in the control chamber.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] There are shown, respectively schematically,

[0023] FIG. 1 a filter module according to the invention, in installed state,

[0024] FIG. 2 a sectional illustration through the filter module according to the invention,

[0025] FIG. 3 an interior view onto the filter housing with second thread arranged therein,

[0026] FIG. 4 a view onto a pump with first thread arranged on a pump housing.

DETAILED DESCRIPTION

[0027] According to FIGS. 1 and 2, a filter module 1 according to the invention, which can be configured for example as oil filter module 1′, has a pump 2 with a pump housing 3, and a filter device 4 with a filter housing 5. According to the invention, a first thread 6 is now arranged on the pump housing 3 (cf. FIG. 4), and a second thread 7, configured in a complementary manner thereto is arranged on the filter housing 5, so that the pump 2 can be easily screwed to the filter housing 5 of the filter device 4 by means of its pump housing 3 and the first thread 6 arranged thereon. The first thread 6 here is an external thread, whereas the second thread 7 is an internal thread configured in a complementary manner thereto.

[0028] By means of the first and second thread 6, 7, compared to solutions hitherto in which a pump had to be screwed to a corresponding filter device by means of separate screws, a connection possibility is provided which is extremely simple, as it is to be fastened intuitively, and which in addition requires no further fastening means, namely screws, and can thereby be configured in an economical manner.

[0029] Observing the pump housing 3 more closely, it can be seen that the latter has a housing cover 8, a middle part 9 and a lower part 10, and thereby is composed from three housing parts 8, 9, 10. In the present case, the first thread 6 is arranged on the lower part 10.

[0030] A connection between the housing cover 8 and the middle part 3 takes place here by means of screws 11, wherein a connection of the middle part 9 and of the lower part 10 likewise takes place by means of screws 11′ (cf. FIG. 2). Hereby, a simple installation and, at the same time, also a simple dismantling, of the individual parts 8, 9, 10 to or respectively from one another, for example for maintenance purposes, can be achieved.

[0031] Observing FIGS. 2 and 4, it can be seen that the first thread 6 is configured as an external thread and, at the same time, is configured in one piece with the lower part 10. The second thread 7 is configured as an internal thread and preferably in one piece with the filter housing 5. The one-piece configuration of the threads 6, 7 with the lower part 10 or respectively with the filter housing 5 enables an economical and, at the same time, high-quality production of the components as plastic injection moulding parts, wherein of course also different material pairings are conceivable, so that for example the lower part 10 with the first thread 6 arranged thereon and configured in one piece is configured as a plastic part or as a metal part, and the filter housing 5 with the second thread 7 arranged in one piece thereon is configured as a metal part or as a plastic part.

[0032] The middle part 9 and the lower part 10 surround a motor compartment 12 here (cf. FIG. 2), in which an electric motor 13 with a rotor 14 is arranged. A stator is also arranged here in the motor compartment 12. The middle part 9 and the lower part 10 enable here an encapsulating of the motor compartment 12, whereby the electric motor 13 which is arranged therein is arranged in a protected manner, in particular protected from an undesired entry of fluid.

[0033] The filter housing 5 and the lower part 10 of the pump 2 delimit a pump chamber 15 (cf. FIG. 2), in which a pump wheel 16, which is connected to the rotor 14 of the electric motor 13 in a non-rotatable manner, is arranged. If thus for example the pump wheel 16 is to be exchanged owing to signs of wear, only the pump 2 must be unscrewed from the filter housing for maintenance, whereby an access to the pump wheel 16 is created directly.

[0034] The housing cover 8 and the middle part 9 of the pump housing 3 delimit a control chamber 17 (cf. FIG. 2) in which for example an electronic control of the pump 2 and electrical connections are arranged. The pump chamber 2 is sealed here with respect to the motor compartment 12 and of course furthermore also with respect to the pump chamber 15.

[0035] Observing the lower part 10 according to FIG. 4, it can be seen that it has an outwardly open annular groove 18 (cf. also FIG. 2), in which a sealing ring 19, for example an O-ring seal, can be arranged. Hereby, a reliable arrangement of the sealing ring 19, fixed in position, is provided, so that the latter can not slip in an undesired manner during screwing of the pump housing 3 into the filter housing 5.

[0036] At the lower part 10, furthermore, a depth stop 20 in the form of an annular step (cf. FIGS. 2 and 4) is arranged, whereas on the filter housing 5 an axial stop 21 (cf. FIGS. 2 and 3) configured in a complementary manner to the depth stop 20, is arranged, on which the lower part 10 lies in correctly installed state, ie. in the installation state. Hereby, an installation end position can be detected haptically by an appropriate worker, whereby a reliable installation can be achieved.

[0037] The middle part 9 can possess, furthermore, an axial first annular flange 22, via which it is pushed into a second annular flange 23 of the lower part 10, configured in a complementary manner thereto. Between the two annular flanges 22 and 23, furthermore an O-ring seal 24 (cf. FIG. 2) is arranged, which seals the motor compartment 12 with respect to the exterior. By the two annular flanges 22 and 23, a reliable and simple installation can be guaranteed, as these serve as guidance aids.

[0038] In order to be able to guarantee, in addition, that exclusively an authorised pump 2 is inserted into the filter housing 5 of the filter module 1, a key-lock system can also be created, which for example can be formed in that the first and second thread 6, 7 are configured as a left-hand thread.

[0039] All in all, with the filter module 1 according to the invention, a distinctly simpler fastening of the pump 2 to the filter device 4 can be created, compared to screw connections hitherto.