Electric motor

• US 20040232787A1
• Filed: 03/10/2004
• Published: 11/25/2004
• Est. Priority Date: 02/09/2002
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Kopf, Frank, Bruder, Peter
• Granted Patent: US 7,105,966 B2
• Time in Patent Office: Days
• US Class Current: 310/89
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

An electric motor for blowers in motor vehicles, having a motor housing which includes as its housing components a pole housing and a bearing lid mounted on the pole housing, and having an electronics housing for receiving electronic components of an electronic unit. To lower the production costs for the electric motor, the electronics housing is embodied in two parts at least one of which is attached to a housing component of the motor housing.

Claims

1-20. -20. (canceled).

21. An electric motor for blowers in motor vehicles, the electric motor comprising

a motor housing (10), which includes as its housing components a pole housing (11) and a bearing lid (12) mounted on the pole housing, and

an electronics housing (21) for receiving electronic components of an electronic unit (20),

the electronics housing (21) being embodied in two parts (211, 212) at least one of which is attached to a housing component (11, 12) of the motor housing.

22. The electric motor of claim 21, wherein the at least one housing part (211, 212) of the electronics housing (21) is integrally formed onto the housing component (11, 12) of the motor housing (10).

23. The electric motor of claim 21, further comprising radially extending struts (35, 36) disposed between the at least one housing part (211) of the electronics housing (21) and the associated housing component (12) of the motor housing (10), said struts (35, 36) being spaced apart in the circumferential direction to thereby create a radial clearance between the electronics housing (21) and the motor housing (10).

24. The electric motor of claim 22, further comprising radially extending struts (35, 36) disposed between the at least one housing part (211) of the electronics housing (21) and the associated housing component (12) of the motor housing (10), said struts (35, 36) being spaced apart in the circumferential direction to thereby create a radial clearance between the electronics housing (21) and the motor housing (10).

25. The electric motor of claim 21, wherein the two housing parts (211, 212) are solidly connected to one another.

26. The electric motor of claim 25, wherein the connection is made by means of a tongue-and-groove labyrinth (31) that is effective between the housing parts (211, 212).

27. The electric motor of claim 25, wherein the tongue-and-groove labyrinth comprises a sliding connection having two guide rails (32) extending around the inside in a generally U-shaped pattern with parallel spacing on one housing part (211), whereby the other housing part (212) can be thrust by its edges between the guide rails (32).

28. The electric motor of claim 27, wherein each guide rail (32) has recesses (34), formed therein, and wherein the recesses (34) in the two guide rails (32) are offset from one another in the longitudinal direction.

29. The electric motor of claim 27, further comprising a sealing rib (33) disposed between the two guide rails (32) (FIG. 11).

30. The electric motor of claim 21, wherein one housing part (211) of the electronics housing (21) is embodied as a bottom shell (22) radially protruding from the motor housing (10), and wherein the other housing part (212) of the electronics housing (21) is embodied as a lid (23) that tightly closes the bottom shell (22).

31. The electric motor of claim 30, wherein the lid (23) of the electronics housing (21) is formed integrally on the bearing lid (12).

32. The electric motor of claim 30, wherein the lid (23) of the electronics housing (21) is formed integrally on the pole housing (11).

33. The electric motor of claim 30, wherein the lid (23) of the electronics housing (21) is formed integrally on both the bearing lid (12) and the bottom shell (22) of the electronics housing (21) on the pole housing (11).

34. The electric motor of claim 30, wherein the bottom shell (22) of the electronics housing (21) is formed integrally on the pole housing (11).

35. The electric motor of claim 30, wherein the bottom shell (22) of the electronics housing (21) is integrally formed on the bearing lid (12).

36. The electric motor of claim 30, wherein the bottom shell (22) is suspended from inside the pole housing (11).

37. The electric motor of claim 21, wherein one housing part (212) is formed by the bearing lid (12), on which the other housing part (211), embodied as a housing cap (38), is mounted axially.

38. The electric motor of claim 37, wherein the housing cap (38) is fastened centrally on the bearing lid (12), and wherein ambient air openings (39) are located on the periphery in the bearing lid (12).

39. The electric motor of claim 37, wherein the housing cap (38) is made from heat-conducting material, and wherein the electronic unit (20) is disposed on the cap bottom (382).

40. The electric motor of claim 21, further comprising a commutator (16) and commutator brushes (17) that press against the commutator (16), the commutator brushes (17) being retained on the bearing lid (12).

41. The electric motor of claim 37, further comprising a commutator (16) and commutator brushes (17) that press against the commutator (16), the commutator brushes (17) being retained on the bearing lid (12), the electronic unit (20) being disposed on the bearing lid (12) on the side remote from the commutator brushes (17) and being connected electrically to the commutator brushes (17) via contact struts (41) that are passed through the bearing lid (12).