DRIVE HAVING A HOUSING, ADAPTER PLATE, AND COVER HOOD

Abstract

A drive includes a housing, an adapter plate, and a cover hood. A flat support surface is provided on the housing, e.g., for placement of the cover hood, and the adapter plate is attached to the housing. A first sealing ring, e.g., an O-ring, is received on the outer circumference of the adapter plate and is arranged between the cover hood and the cover plate, e.g., for sealing. A second sealing ring, e.g., an O-ring or a flat sealing ring, is received and/or attached to the side of the adapter plate facing the support surface, and the second sealing ring is arranged between the adapter plate and the support surface, e.g., for sealing.

Claims

1-15. (canceled)

16. A drive, comprising: a housing including a flat support surface; an adapter plate attached to the housing; a cover hood; a first sealing ring arranged on an outer circumference of the adapter plate and arranged between the cover hood and the adapter plate; and a second sealing ring arranged on and/or attached to a side of the adapter plate facing the support surface and arranged between the adapter plate and the support surface.

17. The drive according to claim 16, wherein the cover hood is adapted to be placed on the flat support surface.

18. The drive according to claim 16, wherein the first sealing ring is arranged as an O-ring and is adapted to seal between the cover hood and the adapter plate, and the second sealing ring is arranged as an O-ring or a flat sealing ring and as adapted to seal between the adapter plate and the support surface.

19. The drive according to claim 16, wherein the drive includes a gearbox adapted to be driven by an electric motor.

20. The drive according to claim 19, wherein the housing houses the electric motor and the gearbox.

21. The drive according to claim 16, wherein a shaft of the drive projects into a space surrounded by the cover hood.

22. The drive according to claim 21, wherein the shaft includes an output shaft of the gearbox.

23. The drive according to claim 21, wherein the shaft projects through a recess of the housing and/or through a recess of the adapter plate.

24. The drive according to claim 21, wherein a shrink disk arranged over the shaft connects the shaft in a non-positive fit to a further shaft inserted into the shaft.

25. The drive according to claim 24, wherein the shrink disk is arranged in the space surrounded by the cover hood.

26. The drive according to claim 16, wherein the adapter plate and/or the cover hood is arranged as an injection molded part

27. The drive according to claim 16, wherein screw heads of screws, passing through the adapter plate and screwed into threaded holes in the support surface, press the adapted plate toward the support surface.

28. The drive according to claim 27, wherein a drill pattern of the threaded holes has a discrete rotational symmetry, that the adapter plate does not have.

29. The drive according to claim 28, wherein the adapter plate has a preferred direction along which the adapter plate has a greatest extension.

30. The drive according to claim 29, wherein the preferred direction is oriented parallel to a plane that includes a contact surface of the cover hood.

31. The drive according to claim 16, wherein the adapter plate includes continuous recesses spaced apart from one another and passing through the adapter plate.

32. The drive according to claim 31, wherein the recesses extend in a direction normal to a plane that includes a contact surface of the cover hood.

33. The drive according to claim 27, wherein the adapter plate includes continuous recesses spaced apart from one another and passing through the adapter plate, the recesses extend in a direction normal to a plane that includes a contact surface of the cover hood, and the screws are arranged in a circumferential direction between the recesses.

34. The drive according to claim 16, wherein the first sealing ring is arranged in a first groove located on an outer circumference of the adapter plate.

35. The drive according to claim 34, wherein the first groove extends continuously in the circumferential direction and/or is open radially outward and/or the first sealing ring projects radially outward out of the first groove.

36. The drive according to claim 16, wherein the second sealing ring is arranged in a second groove that is located on a side of the adapter plate facing the support surface and that extends continuously in the circumferential direction, the second groove being open toward the support surface and/or the second sealing ring projecting out of the second groove toward the support surface.

37. The drive according to claim 16, wherein the cover hood includes a radially projecting tab region through which a screw projects, a threaded region of the screw being screwed into a threaded hole of the support surface, a screw head of the screw pressing the tab region toward the support surface.

38. The drive according to claim 37, wherein a wall thickness of the tab region increases as a radial distance to a rotational axis of a shaft of the drive increases.

39. The drive according to claim 38, wherein, when the cover hood is in a loose state and/or before placement onto and connection to the adapter plate, a surface region of the tab region facing away from the support surface is arranged as a flat surface that is parallel to a contact surface provided on the cover hood for contacting the support surface, and, when the cover hood is positioned onto the support surface and the screw is then tightened, the tab region is pressed and elastically deformed such that the entire contact surface of the cover hood is positioned against the support surface.

40. The drive according to claim 16, wherein the adapter plate includes a radially projecting projection, and an edge region of the cover hood is arranged between the projection and a dome-shaped elevation of the housing part delimiting the support surface.

41. The drive according to claim 40, wherein a largest diameter of the adapter plate is arranged in a circumferential angular region covered by the projection, in relation to a rotational axis of a shaft of the drive, within a plane having a normal oriented parallel to the rotational axis of the shaft.

42. The drive according to claim 16, wherein a maximum radial distance measured via an axial extension of the adapter plate, to a rotational axis of a shaft of the drive, as a function of circumferential angle, has one absolute and a plurality of local maximums, in a range between 0° and 360°, in which two maximums adjacent to one another in a circumferential direction each have an angular distance of 45° to one another, and/or one absolute and seven local maximums, in which two maximums adjacent to one another in the circumferential direction each have an angular distance of 45° to one another.

43. The drive according to claim 16, the first sealing ring extends completely and/or continuously in a circumferential direction against the cover hood.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG. 1 is a cross-sectional view through a subregion of a drive.

[0028] FIG. 2 is an enlarged portion of FIG. 1.

[0029] FIG. 3 is a perspective view of the drive, including an exploded view of parts of the subregion.

DETAILED DESCRIPTION

[0030] As illustrated depicted in the Figures, the drive has an output shaft 3 of a gearbox driven by an electric motor. The electric motor having the gearbox is arranged integrated in a common housing 1.

[0031] The shaft 3 is arranged, for example, as a hollow shaft, so that the solid shaft or hollow shaft of a device to be driven can be inserted into the hollow shaft and is connectable in a non-positive fit by a shrink disc 10 placed over the shaft 3.

[0032] The shaft of the device is inserted from a first end region of the shaft 3 into the shaft 3 and clamped in a non-positive fit by shrinking the shrink disc 10.

[0033] In doing so, the axial region covered by the shaft of the device overlaps or entirely contains the region covered in the axial direction by the shrink disk 10.

[0034] The shrinking is effected by tightening the axially oriented screws of the shrink disc in that the two discs are moved towards one another during the tightening and thereby press together the clamping ring of the shrink disc 10 positioned on the shaft 3 via the tapered pressing surfaces.

[0035] A cover hood 11 is provided on the drive to prevent contact with rotating parts.

[0036] This cover hood surrounds the shrink disc 10 and is positioned against a support surface 2 of the housing 1, in which an extremely narrow gap can occur between the support surface 2 and the cover hood 11, that is, there does not necessarily have to be contact.

[0037] The support surface 2 is, for example, flat.

[0038] Arranged on the cover hood is a tab region 14 projecting radially with respect to the rotational axis of the shaft 3 and through which a screw 13 projects, the threaded region of which is screwed into a threaded hole of the support surface 2 and the screw head of which presses the tab region 14 towards the support surface 2; however, this pressing of the cover hood 11 cannot be implemented with great reliability.

[0039] To achieve a reliable seal, an adapter plate 8 is pressed against the housing 1 by screws 7, 9 passing through the adapter plate 8. In doing so, the screw heads of the screws 7, 9 press the adapter plate 8 towards the support surface 2, and a second sealing ring 4, e.g., a flat sealing ringing ring or O-ring, is received on the adapter plate 8 and presses against the support surface 2. The second sealing ring 4 is arranged circumferentially, e.g., continuously circumferentially, in the circumferential direction with respect to the rotational axis of the shaft 3.

[0040] The second sealing ring 4 is thus arranged between the adapter plate 8 and the support surface 2 and is elastically deformed, so that the region arranged radially inside the second sealing ring 4 between the adapter plate 8 and the support surface 2 is sealed against the surroundings.

[0041] A groove extending circumferentially into which an O-ring is, at least in part, pressed and/or inserted as a second sealing ring is provided on the side of the adapter plate 8 facing the support surface 2.

[0042] The screws 7, 9 are screwed into threaded holes of the support surface 2. These threaded holes form a drill pattern having a discrete 90° rotational symmetry relative to the rotational axis of the shaft 3. That is, the adapter plate 8 is connectable to the housing 1 in four orientations.

[0043] The outer circumference of the adapter plate does not have any discrete rotational symmetry, however. Thus, a preferred direction can be seen with the naked eye.

[0044] A groove is provided on the outer circumference and is open in the radial direction, that is, to the back. This groove is arranged circumferentially, e.g., continuous circumferentially, in the circumferential direction.

[0045] A first sealing ring, e.g., an O-ring, is received in this groove. That projects on the outer circumference. When the cover hood 11 is positioned, this first sealing ring 6 is elastically deformed and thus effects a tight connection between the adapter plate 8 and the cover hood 11.

[0046] The support surface 2 is arranged flat, in which the associated normal direction, e.g., the direction normal to the plane containing the support surface 2, is oriented parallel to direction of the rotational axis of the shaft 3.

[0047] The shaft 3 is rotatably supported by at least one bearing received in the housing 1. Also received in the housing 1 is a shaft sealing ring 15 that seals an oil-filled inner space of the gearbox of the drive against the shaft 3. seals the housing. However, even if this shaft sealing ring 15 is not tight, leaked oil would only penetrate into the region surrounding the cover hood 11. This is because this region is sealed against the surroundings by the first and second sealing rings 4, 6. This would even apply if there was a gap between adapter plate 8 and the support surface 2 and/or if there was a gap between cover hood 11 and the support surface 2.

[0048] The adapter plate 8 is, for example, arranged as a plastic injection molded part. The cover hood 11 is, for example, arranged as a plastic injection molded part.

[0049] The outer circumference of the adapter plate 8 is a rounded square having a projection 5 on a first side, e.g., projecting radially. The outer circumference does not project as far radially on the opposing side as on the first side.

[0050] Likewise, the outer circumference does not project as far radially on the two other sides as on first side.

[0051] The support surface 2 is delimited on one side by a sub-region of the housing 1 that arches in a dome-like manner in the direction normal to the support surface 2. Thus, the cover hood 11 when positioned is inserted between the sub-region 16 arching in a dome-like manner and the first sealing ring in the region of the projection 5. This positioning can thus be accomplished, e.g., rapidly and readily.

[0052] The adapter plate 8 has continuous, e.g., axially continuous, recesses. These recesses are disposed radially inside the first and second sealing rings 4, 6, however. Thus, the adapter plate 8 is arranged elastic and in a material-saving manner, yet sealing tightness is assured.

[0053] According to exemplary embodiments, a wall thickness that increases as the radial distance to the rotational axis of the shaft 3 increases is arranged on the tab region 14, e.g., in which, when the cover hood 11 is in a loose state, e.g., before placement onto and connection to the adapter plate 11, a surface region of the tab region 14 facing away from the support surface 2 is formed as a flat surface that is parallel to the contact surface provided on the cover hood 11 for contacting the support surface 2. Thus, when the cover hood 11 is placed onto the support surface 2 and the screws 13 are tightened, the tab region is pressed and elastically deformed such that the entire contact surface of the cover hood is positioned against the support surface 2 in a gap-free manner.

LIST OF REFERENCE NUMERALS

[0054] 1 Housing [0055] 2 Support surface, e.g., a flat surface [0056] 3 Shaft, e.g., a hollow shaft [0057] 4 Second sealing ring [0058] 5 Projection [0059] 6 First sealing ring [0060] 7 Screw [0061] 8 Adapter plate [0062] 9 Screw [0063] 10 Shrink disc [0064] 11 Cover hood [0065] 12 Toothed disk [0066] 13 Screw [0067] 14 Tab region, projecting on the cover hood