ELECTRICAL DEVICE, E.G., A CONVERTER MOTOR, HAVING A HOUSING PART AND A COVER PART

Abstract

An electrical device, e.g., a converter motor, includes a housing part and a cover part. A frame part is positioned between the housing part and the cover part, and an electronic circuit is situated in the interior space surrounded by the housing that includes the housing part and the cover part, e.g., and the frame part. A seal is situated, e.g., injection-molded, on the frame part. For example, the seal touches both a connection surface, e.g., a planar connection surface arranged on the cover part, and it covers a connection surface, e.g., a planar connection surface arranged on the housing part. A region of the connection surface of the cover part touches the frame part, and a region of the connection surface of the housing part touches the frame part.

Claims

1-15. (canceled)

16. An electrical device, comprising: a housing part; a cover part; a frame part arranged between the housing part and the cover part; an electronic circuit arranged in an interior space surrounded by a housing that includes the housing part, the cover part, and the frame part; and a seal arranged on the frame part; wherein the seal touches a connection surface of the cover part and provides a seal between the frame part and the cover part; wherein the seal touches a connection surface of the housing part and provides a seal between the frame part and the housing part; wherein a region of the connection surface of the cover part touches the frame part; and wherein a region of the connection surface of the housing part touches the frame part.

17. The electrical device according to claim 16, wherein the electrical device is arranged as a converter motor.

18. The electrical device according to claim 16, wherein the seal is injection-molded on the frame part.

19. The electrical device according to claim 16, wherein the connection surface arranged on the cover part and/or the connection surface arranged on the housing part is arranged as a planar connection surface.

20. The electrical device according to claim 16, wherein the seal surrounds an outer edge region of the frame part when viewed from a direction of the interior space.

21. The electrical device according to claim 16, wherein a first region of the seal is arranged on a side of the frame part facing the cover part, and a second region of the seal is arranged on a side of the frame part facing the housing part.

22. The electrical device according to claim 16, wherein a screw that extends through the cover part and through the frame part is screwed into a threaded bore arranged in the housing part, a screw head of the screw presses the cover part toward the housing part so that the cover part touches the frame part and the frame part touches the housing part.

23. The electrical device according to claim 22, wherein the screw head of the screw presses the cover part toward the housing part so that the cover part touches the frame part and the frame part touches the housing part on a side of the frame part facing away from the cover part.

24. The electrical device according to claim 16, wherein the frame part is formed of metal and the seal formed of a plastic material and/or rubber.

25. The electrical device according to claim 16, wherein the frame part is substantially rectangular.

26. The electrical device according to claim 16, wherein the frame part includes tab regions and/or clip-shaped tab regions retained in a positively-engaged manner on and/or clipped to lug regions arranged on the housing part and/or premolded on an inner wall of the housing part that protrude into the interior space.

27. The electrical device according to claim 26, wherein each lug region includes a lead-in bevel and/or protrudes to an increasing extent into the interior space in a direction of a screw axis of a screw.

28. The electrical device according to claim 27, wherein the lug region behind the lead-in bevel protrudes into the interior space to a lesser extent than in the lug region.

29. The electrical device according to claim 26, wherein each lug region is arranged as a thickening of a wall of the housing part.

30. The electrical device according to claim 22, wherein the threaded bore is arranged in a thickening of a wall of the housing part.

31. The electrical device according to claim 30, wherein the thickening is set apart from lug regions and protrudes into the interior space.

32. The electrical device according to claim 22, wherein the connection surfaces are aligned in parallel with a plane having a normal that is parallel to a direction of a screw axis of the screw.

33. The electrical device according to claim 26, wherein the tab regions on the frame part are arranged as bent parts that are bent in a direction of a screw axis.

34. The electrical device according to claim 33, wherein the tab regions on the frame are arranged as bent parts that are bent from a plane extending in parallel with a plane having a normal that is parallel to the direction of the screw axis.

35. The electrical device according to claim 16, wherein the frame part has a recess, and the housing part includes a pin that protrudes into the recess.

36. The electrical device according to claim 35, wherein the recess is continuous in a direction of a screw axis of a screw, the pin is arranged as a thickening of a wall of the housing part, and the thickening is set apart from lug regions and protrudes into the interior space.

37. The electrical device according to claim 16, wherein an underside of the housing part includes a recess, the housing part is arranged on a shoulder of a terminal box of an electric motor, and stator lines of a stator of the electric motor are arranged through the recess into the interior space surrounded by the housing.

38. The electrical device according to claim 37, wherein a converter is arranged in the interior space.

39. The electrical device according to claim 16, wherein the seal is arranged as a composite part together with the frame part.

40. The electrical device according to claim 16, wherein, on a side of the frame part facing the cover part, the seal includes a first sealing lip circumferentially arranged on the frame part and elastically deformed more heavily than a rest of a material of the seal on the side of the frame part facing the cover part.

41. The electrical device according to claim 40, wherein, on a side of the frame part facing the housing part, the seal includes a second sealing lip circumferentially arranged on the frame part and elastically deformed more heavily than the rest of the material of the seal on the side of the frame part facing the housing part.

42. The electrical device according to claim 22, wherein the screw projects through a hole arranged in the frame part and is sealed by the seal on each connection surface, on both sides on the frame part, from the interior space and the environment.

43. The electrical device according to claim 41, wherein the first sealing lip completely surrounds a first screw in a first one of the connection surfaces and provides a seal from the interior space and the external environment, and the second sealing lip completely surrounds a second screw in second one of the connection surfaces provides a seal from the interior space and the external environment.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a schematic perspective view of a housing part 6 with a frame part 1 positioned thereon.

[0024] FIG. 2 is a schematic perspective, exploded view of a frame part 1 and housing part 6.

[0025] FIG. 3 is a schematic cross-sectional view through a housing that is formed by housing part 6 with cover part 30 placed on frame part 1.

[0026] FIG. 4 is an enlarged schematic view of a portion of FIG. 3.

[0027] FIG. 5 is a schematic top view of the housing.

DETAILED DESCRIPTION

[0028] As schematically illustrated in the Figures, the housing part has a recess 7 on its underside so that the housing is able to be placed on a shoulder of a terminal box of an electric motor and the stator lines are able to be guided through recess 7 into the interior space surrounded by the housing.

[0029] An electronic circuit, which may be arranged as a converter for feeding the electric motor, is able to be placed inside the housing. As a whole, the converter together with the housing and electric motor thus makes up a converter motor.

[0030] As an alternative, however, the housing may also be placed in a decentralized manner, i.e., separately from the electric motor in a system. To this end, housing part 6 is attached to a support part or a device with the aid of screws.

[0031] Frame part 1, which includes an injection-molded seal 2, is able to be placed between cover part 30 and housing part 6. Thus, cover part 30 is tightly connectable to housing part 6. This is because frame part 1 has a wall thickness that is thinner than the wall thickness of seal 2. In addition, seal 2 is placed at the outer edge of frame part 1. When screws 31 are screwed into threaded bores introduced into housing part 6, cover part 30 is therefore pressed via a planar connection surface against frame part 1, which in turn exerts pressure on a planar connection surface of housing part 6.

[0032] In the process, seal 2 is elastically compressed and thus rests tightly against the two connection surfaces.

[0033] Seal 2 has a greater wall thickness, but not along the entire connection surface to cover part 30 and to housing part 6; instead, seal 2 has a circumferential sealing lip at the outer edge of frame part 1, which protrudes from the rest of the material of seal 2. A particularly high surface pressure of seal 2 is therefore achievable, which consequently also means that a high degree of protection is able to be induced.

[0034] FIG. 4 shows seal 2 in an undeformed state, although cover part 30 and housing part 6 rest against frame part 1. The protruding region of seal 2 illustrated is the region that is deformed during the actual connecting. High surface pressure is therefore exerted on seal 2.

[0035] Frame part 1 has tab regions 3, which are set apart from one another and clipped into lug regions 5 that protrude on housing part 6.

[0036] Tab regions 3 are bent off frame part 1 by approximately 90° and thus extend perpendicular to the connection surfaces.

[0037] Lug regions 5 project in the direction of the interior space and have a lead-in bevel so that when frame part 1 is placed on housing part 6, the tab region is guided along the lead-in bevel and initially is elastically deflected to an increasing extent into the interior space region surrounded by housing part 6. Once the point of the respective lug region 5 maximally projecting into the interior space is exceeded, respective tab region 3 snaps into place in a depression or recess behind respective lug region 5.

[0038] In addition, frame part 1 is provided with recesses, e.g., round holes, into which pins premolded on housing part 6 protrude so that frame part 1 is positioned and/or centered in relation to housing part 6.

[0039] The respective pin 4 is provided on a bar, which is implemented as a thickened region of the wall thickness of housing part 6.

[0040] In the same manner, lug region 5 is arranged as a thickened region of the wall thickness of housing part 6.

[0041] The sealing lip of seal 2 circumferential along the outer edge of frame part 1 extends in two parts in the region of respective threaded bore 8. The sealing lip in this region is thus split into an inner part that faces toward the interior space and an outer part that faces away from the interior space.

[0042] Thus, the mouth of respective threaded bore 8 is surrounded by the sealing lip on both sides when viewed from the direction of the interior space, and it is thus completely sealed, e.g., in all directions of the connection surface, once cover part 30 is placed on top.

[0043] In further exemplary embodiments, frame part 1 is produced from the same material as housing part 6 and cover part 30, e.g., aluminum. As a result, no interruptions in the sealing system are able to be induced even in the presence of thermal changes.

[0044] In further exemplary embodiments, the housing is used to enclose a different electronic circuit. The housing consequently is arranged as a housing for an electrical device.

LIST OF REFERENCE NUMERALS

[0045] 1 frame part, e.g., metallic frame part

[0046] 2 seal

[0047] 3 tab region of frame part 1

[0048] 4 pin

[0049] 5 lug region

[0050] 6 housing part

[0051] 7 recess

[0052] 8 threaded bore 30 cover part

[0053] 31 screws