Drive, comprising an electric motor with a brake, a fan cowl, and a rod for manually actuating the brake, and process for manufacturing a drive

Abstract

A drive includes an electric motor with a brake and a fan cowl. The fan cowl is connected to a housing, in particular to a stator housing part, of the electric motor in a detachable manner. A rod is able to be passed through a cover part, which projects through a recess, in particular a recess arranged in the form of a slot, in the fan cowl.

Claims

1. A drive, comprising: an electric motor including a housing part; a brake; a fan cowl detachably connected to the housing part and including a recess; a cover part projecting through the recess; and a pivotable rod guidable through the cover part, pivotable relative to the brake, and adapted to manually actuate the brake; wherein the cover part is movable relative to the fan cowl along an axial direction of the electric motor in response to pivoting of the rod to manually actuate the brake; and wherein the cover part includes at least one groove section adapted to guide the cover part relative to the fan cowl in the axial direction in response to pivoting the rod to manually actuate the brake.

2. The drive according to claim 1, wherein the housing part is arranged as a stator housing part.

3. The drive according to claim 1, wherein the recess is arranged as a slot.

4. The drive according to claim 1, wherein the rod is pivotable with respect to the cover part, is arranged as a lever, and is adapted to manually actuate the brake by lifting the brake.

5. The drive according to claim 1, wherein the cover part is snapped into the fan cowl, is snapped into a slot of the fan cowl, and/or is made from rubber and/or plastic.

6. The drive according to claim 1, wherein the cover part includes a plate-shaped area and a guide region is connected to the plate-shaped area, first groove section set apart from each other in a circumferential direction being provided on the guide region, the fan cowl and/or a respective edge region of a slot of the fan cowl projecting into one of the first groove sections.

7. The drive according to claim 6, wherein an area covered by the recess in an axial direction is greater than an area covered by the guide region, an area covered by the plate-shaped area in the axial direction being larger than the area covered by the recess.

8. The drive according to claim 6, wherein second groove sections are provided on the guide region and are set apart from the first groove sections in an axial direction.

9. The drive according to claim 8, wherein each of the groove sections includes two depressions set apart from each other in a circumferential direction.

10. The drive according to claim 6, wherein the guide region of the cover part projects through a slot provided in the fan cowl and/or the plate-shaped area rests on a radially outer surface area of the fan cowl.

11. The drive according to claim 1, wherein the groove section engages an axial surface of the recess of the fan cowl.

12. A drive, comprising: an electric motor including a housing part; a brake; a fan cowl detachably connected to the housing part and including a recess; a cover part projecting through the recess; and a rod guidable through the cover part, movably provided on the brake and adapted to manually actuate the brake; wherein the cover part includes a plate-shaped area and a guide region is connected to the plate-shaped area, first groove section set apart from each other in a circumferential direction being provided on the guide region, the fan cowl and/or a respective edge region of a slot of the fan cowl projecting into one of the first groove sections; wherein second groove sections are provided on the guide region and are set apart from the first groove sections in an axial direction; wherein each of the groove sections includes two depressions set apart from each other in a circumferential direction; and wherein the depression that faces the plate-shaped area includes an insertion bevel and/or an insertion bevel pointing toward the plate-shaped area.

13. The drive according to claim 12, wherein the fan cowl is arranged in the depression of the groove section facing the plate-shaped area and/or the fan cowl rests against a radially inner surface area of the plate-shaped area, another depression of the respective groove second being set apart from the fan cowl.

14. A drive, comprising: an electric motor including a housing part; a brake; a fan cowl detachably connected to the housing part and including a recess; a cover part projecting through the recess; and a rod guidable through the cover part, movably provided on the brake and adapted to manually actuate the brake; wherein a depression is provided in the cover part, a recess being provided in the depression and/or centered with respect to the depression.

15. A drive, comprising: an electric motor including a housing part; a brake; a fan cowl detachably connected to the housing part and including a recess; a cover part projecting through the recess; and a rod guidable through the cover part, movably provided on the brake and adapted to manually actuate the brake; wherein the cover part includes a plate-shaped area and a guide region is connected to the plate-shaped area, first groove section set apart from each other in a circumferential direction being provided on the guide region, the fan cowl and/or a respective edge region of a slot of the fan cowl projecting into one of the first groove sections; and wherein a radially uninterrupted recess is provided in a depression in the cover part and extends through the plate-shaped region and through the guide region.

16. The drive according to claim 15, wherein tab areas are provided inside the depression and are integral with the cover part and/or with the guide region of the cover part.

17. The drive according to claim 16, wherein the depression is cylindrically shape, the tab areas cover a same circumferential angle amount in a circumferential direction around a cylinder axis of the depression, and are set apart from one another at regular intervals, the tab areas covering a same radial distance region in relation to the cylinder axis, and the tab areas cover a same axial region.

18. The drive according to claim 17, wherein a slot is provided in the circumferential direction between the tab areas in relation to the cylinder axis and extends radially from the guide region to the uninterrupted recess in relation to the cylinder axis.

19. The drive according to claim 16, wherein an amount of force required to achieve elastic deflection of the tab areas, by the rod when pushing through the depression, is greater than a predetermined amount of force maximally applicable by a test finger.

20. The drive according to claim 16, wherein the uninterrupted recess is arranged radially within a radial distance region covered by the tab areas in relation to the cylinder axis.

21. The drive according to claim 16, wherein the tab areas are elastically deflected, deformed, and/or press against the rod in a elastically tensioned manner for sealing purposes, and/or the tab areas are set apart from one another at regular intervals by slots.

22. A process for manufacturing a drive that includes an electric motor including a housing part, a brake, a fan cowl detachably connected to the housing part and including a recess, a cover part projecting through the recess, and a rod guidable through the cover part, movably provided on the brake and adapted to manually actuate the brake, comprising: selectively using a first fan cowl or a second fan cowl as the fan cowl of the drive, a wall thickness of the first fan cowl being smaller than a wall thickness of the second fan cowl; wherein the cover part includes a groove section having a groove width equal to the wall thickness of the second fan cowl, the groove section having two depressions radially set apart from each other, the first fan cowl being arranged only in a first one of the two depressions and being set apart from a second one of the two depressions, and the second fan cowl filling and/or covering both depressions of the two depressions.

23. The method according to claim 22, wherein the first fan cowl is formed of sheet metal and/or steel sheet, and the second fan cowl is formed of a metal casting.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic perspective view of a fan cowl having a cover part, with a rod being guided through cover part.

(2) FIG. 2 is another schematic perspective view of fan cowl.

(3) FIG. 3 is another schematic perspective view.

(4) FIG. 4 is a schematic top view of cover part.

(5) FIG. 5 is a schematic cross-sectional view through cover part.

(6) FIG. 6 is a schematic side view of cover part.

(7) FIG. 7 is a schematic perspective view of the cover part.

DETAILED DESCRIPTION

(8) As schematically illustrated in the Figures, fan cowl 2 has a recess which is covered by cover part 1.

(9) Fan cowl 2 surrounds a fan, which is situated in an axial end region of an electric motor. The electric motor has a stator housing H, e.g., a housing part and/or a stator housing part, to which the fan cowl is connected in a detachable manner.

(10) Fan cowl 2 is used for directing the airflow conveyed by the fan towards outlet openings, from where the airflow emerges and flows along the outside of the stator housing. Effective cooling of the motor is able to be achieved in this manner.

(11) In its axial end region pointing away from the motor, fan cowl 2 has a grid with grid openings through which the airflow aspirated by the fan travels.

(12) The axial direction extends parallel to the axis of rotation of the rotor of the electric motor, with the rotor being rotatably mounted in relation to the stator housing.

(13) In addition, an electromagnetically actable brake B, which is radially surrounded by fan cowl 2, is situated in the axial end region of the motor.

(14) For the manual lifting of the brake, e.g., in a failure of the public electric grid, a rod 3 is provided, which is able to be operated from the surroundings, i.e., from outside fan cowl 2.

(15) For the connection of rod 3 to the brake, rod 3 is guided through cover part 1. Cover part 1 has an uninterrupted recess for this purpose.

(16) After the connection to the brake, rod 3 is rotatably supported, with the associated pivot joint being situated on the brake. The axis of rotation is aligned perpendicular to the axis of rotation of the rotor shaft, the two axes of rotation in particular being set apart from each other. During the rotary motion, rod 3 is pivotable within a plane that encompasses the axis of rotation of the rotor shaft or is situated in parallel therewith. In other words, rod 3, in particular the center of gravity of rod 3, is also moved in the axial direction for the manual lifting of the brake and moved back in the axial direction for the release.

(17) In the released state, no manual lifting exists so that the actuation of the brake takes place electromagnetically. When a brake coil of the brake is energized, the brake is lifted, and when the energization of the brake coil fails to take place, the brake is applied.

(18) Cover part 1 is situated so as to allow for a relative movement with respect to fan cowl 2.

(19) To this end, the recess is arranged in the form of an axial slot so that cover part 1 together with rod 3 is able to be moved back and forth during its pivot motion.

(20) The wall thickness of fan cowl 2 is constant in the contact region with cover part 1.

(21) Cover part 1 may be formed from rubber or a plastic material.

(22) Cover part 1 has a plate-shaped area which rests against the outer side of fan cowl 2 and in the process covers the recess embodied as an axial slot in fan cowl 2.

(23) Formed on this plate-shaped area is a guide region that projects through the recess and has groove sections 50 on the side into which fan cowl 2 is snapped.

(24) A first one of groove sections 50 is situated in the front end region of the guide region in the circumferential direction.

(25) A second one of groove sections 50 is situated in the rear end region of the guide region in the circumferential direction.

(26) A third groove region 50 is arranged in a similar manner as the first of groove sections 50 and is axially set apart therefrom, but in the same radial position and circumferential angular position.

(27) A fourth groove section 50 is arranged in a similar manner as the second of groove sections 50 and axially set apart therefrom, but in the same radial position and circumferential angular position.

(28) Groove sections 50 in the front end region in the circumferential direction are thus axially set apart from one another.

(29) In the same manner, groove sections 50 in the rear end region in the circumferential direction are axially set apart from one another.

(30) The area axially covered by the guide region also encompasses the regions axially covered by groove sections 50.

(31) The circumferential angular region covered by first groove section 50 is set apart from the circumferential angular region covered by second groove section 50 in the circumferential direction.

(32) Each groove section 50 has two depressions, which are situated next to each other in the radial direction and extend in the axial direction in each case.

(33) Cover part 1 is radially pressed into the axial slot of the fan cowl to such a depth that the fan cowl is snapped into the depression situated farther outside in the radial direction. Thus, fan cowl 2 rests against the radially outer groove wall of respective groove section 50. In other words, the fan cowl is retained in the radially outer of the two depressions in that the fan cowl is situated in the radially outer of the two depressions.

(34) Fan cowl 2 may be made from steel sheet.

(35) Cover part 1 is also able to be used for fan cowls that have a greater wall thickness. Wall thicknesses that correspond to the maximum radial extension of the two depressions are allowed. In such a case, instead of being produced from sheet metal, fan cowl 2 may particularly be produced from a cast, the cast, e.g., being an aluminum cast on which an angle sensor is then able to be supported. In a configuration from a cast, the fan cowl may completely fill the respective groove section and thus is snapped in, i.e., retained, in a keyed manner. The fan cowl rests against the groove walls of the groove on both sides, i.e., in particular radially on the inside and outside.

(36) FIG. 5 is a schematic cross-sectional view through cover part 1. When cover part 1 is placed on top of fan cowl 2 produced from sheet metal, it is resting against the underside of the plate-shaped area and is snapped into place in the lower of the two depressions of groove section 50.

(37) In the thin-walled embodiment of fan cowl 2, and thus in particular when using very thin sheet metal, a bevel inside the deeper of the two depressions causes the fan cowl to slide in the direction of the plate-shaped area when being snapped in, i.e., to lie against the underside of the plate-shaped area. In other words, the deeper depression of the two depressions of groove section 50 in the circumferential direction also has an insertion bevel, so to speak. After the fan cowl is introduced into this depression, the fan cowl is situated at the particular radial distance in which the guide region of cover part 1 has the smallest extension in the axial region covered by groove section 50 in the circumferential direction.

(38) With the thicker arrangement of fan cowl 2, and thus in particular when using a cast as the material for fan cowl 2, fan cowl 2 is resting against the underside of the plate-shaped area of cover part 1 with its radially outer surface and against the groove wall of groove section 50 facing away from the plate-shaped area with its radially inner surface.

(39) The schematic cross-sectional view of FIG. 5 pertains only to two of the four groove sections 50.

(40) After cover part 1 is snapped into the axial slot of the fan cowl, groove sections 50 as a whole function as an axially directed guide for cover part 1. The axial slot may have a constant slot width, in particular at least in the particular region in which the guidance of cover part 1 is to be provided.

(41) As illustrated in FIG. 4 and FIG. 7, the plate-shaped area of the cover part has a depression 41 inside which a recess is situated which penetrates cover part 1 and is disposed in a centered manner between tab areas 42 situated inside the depression. Tab areas 42 are integrally formed, i.e., in one piece, especially molded, on cover part 1, in particular on the plate-shaped area of cover part 1.

(42) In the circumferential direction oriented around the uninterrupted recess, tab areas 42 are set apart with the aid of slots from the tab area situated closest in this circumferential direction in each case.

(43) Tab areas 42 may have an identical configuration.

(44) Each tab area 42 covers the same radial distance region and the same axial region viewed from the center of the uninterrupted recess.

(45) Slots 40 may be arranged in the form of cross slots.

(46) Rod 3 has a thicker configuration than the uninterrupted recess. More specifically, rod 3 is arranged as a round part, i.e., cylindrically, in the penetration region and has a larger diameter than the inner diameter of the uninterrupted recess.

(47) As a result, tab areas 42 are elastically deflected and rest against rod 3 when rod 3 is guided through depression 41. Thus, through the elastically deflected tab areas 41 resting against rod 3 and exerting contact pressure by their elastic pretensioning, cover part 1 is therefore connected to rod 3 by force locking, so that cover part 1 is carried along in its pivot motion.

(48) However, when this force-locking connection is overloaded, then the keyed linkage of rod 3 still remains insofar as it is guided through the uninterrupted recess of cover part 1.

(49) The elasticity of the tab areas is configured such that the force required to push through depression 41 with the aid of rod 3 is greater than a force specified by the standard with which a test finger is allowed to exert pressure on a device satisfying the standard. This ensures high safety for persons because the test finger according to the standard is unable to pass through depression 41.

(50) Rod 3 may be screw-fitted with a joint part of the pivot joint of the brake, which makes the pivot motion possible.

LIST OF REFERENCE NUMERALS

(51) 1 cover part 2 fan cowl 3 rod, in particular lever rod 40 slot, in particular subregion of a cross slot 41 depression, in particular recess 42 tab area 50 groove section 51 connection area