Electric motor with a fan guard arrangement

Abstract

The invention relates to an electric motor having a fan guard arrangement which has a fan cover which is connected to a fan guard of the fan guard arrangement, wherein the fan cover has rings, which are oriented concentrically with respect to one another, and an angular sheet metal ring which is likewise oriented concentrically with respect to the rings, wherein the angled sheet metal ring is arranged radially outside all rings, wherein webs which extend in the radial direction and are spaced apart from one another in the circumferential direction are each connected to all rings and the angular sheet metal ring.

Description

[0001] Electric motor with a fan hood arrangement

[0002] Description:

[0003] The invention relates to an electric motor with a fan hood arrangement.

[0004] It is generally known that for safety reasons, the fan of an electric motor must be surrounded by a protective grille.

[0005] The invention is therefore based on the objective of further developing an electric motor with a fan hood arrangement in a way that is easy to manufacture.

[0006] According to the invention, the problem is solved in the electric motor according to the features specified in claim 1.

[0007] Important features of the invention in the electric motor with a fan hood arrangement, which has a fan cover connected to a fan hood of the fan hood arrangement,

[0008] wherein the fan cover has concentrically aligned rings and an angled sheet metal ring also concentrically aligned with the rings,

[0009] wherein the angle plate ring is arranged radially outside all rings,

[0010] wherein radially extending webs spaced apart from each other in the circumferential direction are each connected to all rings and the angle plate ring, in particular by material bonding.

[0011] The advantages include simple manufacturing and the damping of vibrations by the webs. The radial spacing of the rings also further dampens vibrations.

[0012] ISI \ EIDOPAT 17.11.2025 In an advantageous embodiment, the rings are arranged along a conical surface, in particular an imaginary one,

[0013] In particular, the conical axis of the conical surface is aligned coaxially with the axis of rotation of the rotor shaft of the electric motor. An advantage of this is that the fan shroud arrangement exhibits high stability.

[0014] In an advantageous embodiment, the axial direction is aligned parallel to the direction of the axis of rotation of the rotor shaft of the electric motor.

[0015] and / or

[0016] The radial direction refers to the axis of rotation of the rotor shaft of the electric motor.

[0017] and / or

[0018] The circumferential direction is relative to the axis of rotation of the rotor shaft of the electric motor.

[0019] In an advantageous embodiment, the rings, in particular all rings, are spaced apart from each other in the axial direction. An advantage of this is that the fan hood arrangement exhibits high stability.

[0020] In an alternative advantageous embodiment, the rings are arranged overlapping each other and / or their nearest neighboring ring(s) in the axial direction. An advantage of this is that the fan hood arrangement exhibits high stability.

[0021] In an advantageous embodiment, the angle plate ring has a perforated disc-shaped region and an adjacent cylindrical shell-shaped region. In an alternative advantageous embodiment, the angle plate ring has a perforated disc-shaped region and an adjacent conical region, in particular wherein the cone angle of the conical region is equal to the cone angle of the conical surface and / or wherein the conical region is contained within the conical surface. It is advantageous that the angle plate ring is designed as a body of revolution, wherein the body of revolution is formed by rotating an L-shaped base body.

[0022] In an advantageous embodiment, the angle plate ring has elongated holes on its edge region facing axially away from the rings and has radially through round holes in its hollow cylindrical region, in particular the cylindrical shell-shaped region.

[0023] in particular wherein the elongated holes are spaced apart from the round holes in the circumferential direction,

[0024] in particular wherein the elongated holes are arranged alternately with the round holes in the circumferential direction,

[0025] in particular wherein a round hole is arranged in the circumferential direction between each pair of adjacent elongated holes,

[0026] In particular, the area covered by the round holes in the axial direction is encompassed by the area covered by the elongated holes in the axial direction. An advantage of this is that simple and precise manufacturing is achievable.

[0027] In a preferred embodiment, the fan housing assembly is made of metal, in particular aluminum or steel. The advantage here is that high stability can be achieved.

[0028] In a preferred design, the fan cover is manufactured as a stamped and bent part. The advantages of this design are simple manufacturing and high stability.

[0029] In an advantageous embodiment, each bridge has two legs aligned parallel to each other,

[0030] - which are spaced apart from each other or which are connected to each other at their first end area via a yoke.

[0031] The advantage here is that vibrations can be dampened even more effectively.

[0032] In an advantageous embodiment, each leg is connected to each ring, in particular by a material bond, and to the angle plate ring. The advantage here is that vibrations can be dampened even more effectively.

[0033] In an advantageous embodiment, the legs extend radially or rest against the conical surface. A key advantage is that high stability can be achieved in this configuration.

[0034] In an advantageous embodiment, each web projects through an opening in the angle plate ring,

[0035] wherein the respective yoke of the respective bridge is arranged on the side of the angle plate ring facing away from the rings axially. An advantage of this is that the respective bridge can be connected on both the axially front and the axially rear side.

[0036] In an advantageous embodiment, the rings are spaced axially from the angle plate ring, or at least the angle plate ring is spaced axially from the centers of gravity of the rings. This is advantageous because vibrations can be dampened more effectively.

[0037] In an advantageous embodiment, the webs are uniformly spaced from one another in the circumferential direction. This has the advantage of improving vibration damping. In an advantageous embodiment, the rings are uniformly spaced from one another in the radial direction. This has the advantage of improving vibration damping.

[0038] Further advantages arise from the dependent claims. The invention is not limited to the combination of features of the claims. For those skilled in the art, further meaningful combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent, in particular from the problem statement and / or the problem arising from a comparison with the prior art. The invention will now be explained in more detail with reference to schematic illustrations:

[0039] Figure 1 shows a fan hood arrangement according to the invention for an electric motor with fan in an oblique view.

[0040] Figure 2 shows a fan cover 1 of the fan hood arrangement in oblique view.

[0041] As shown in the figures, the electric motor has a fan shroud arrangement that radially surrounds a fan and is covered at the front by the fan cover 1, which

[0042] is attached to the hollow cylindrical fan cover 6 and fastened with screws 4.

[0043] For this purpose, the fan hood 6 has an arrangement of concentrically aligned rings 21, which are connected to each other via radially directed webs 20.

[0044] An angled sheet metal ring 22, also concentrically aligned with the rings 21, surrounds the rings 21 radially.

[0045] The webs 20 extend from the radially innermost ring 21 to this angle plate ring 22 and are connected to both this angle plate ring 22 and to each of the rings 21, in particular by material bonding, preferably by welding.

[0046] The angle plate ring 22 is designed as a body of revolution, whereby it is generated by rotation of an L, the first leg of which is oriented only in the radial direction and the second leg of which is adjacent to the first leg is oriented only in the axial direction.

[0047] The axial direction is aligned parallel to the axis of rotation of the rotor shaft of the electric motor and / or the fan, and the radial direction is relative to this axis of rotation. The circumferential direction is also relative to this axis of rotation.

[0048] The axis of rotational symmetry of the rotating body is aligned coaxially with the axis of rotation of the rotor shaft. The area of ​​the angle plate ring 22 produced by rotation of the second leg is a hollow cylinder-shaped area, and the area of ​​the angle plate ring 22 produced by rotation of the first leg is a perforated disk-shaped area.

[0049] The rings 21 are all radially spaced apart from each other.

[0050] Preferably, each web 20 is U-shaped, wherein the two legs of the U are elongated in such a way that each of the two legs aligned parallel to each other is connected to each of the rings 21 and to the angle plate ring 22, in particular by a material bond.

[0051] The yoke connecting the two legs of each U-shape projects through a respective opening in the angle bracket ring 22 towards the side facing the fan hood. For this purpose, the legs are each curved and thus project through the respective opening in an axial direction, although in the remaining area they essentially extend in a radial direction.

[0052] The fan cover 2 is attached to a stator housing of the electric motor.

[0053] As shown in Figures 1 and 2, the rings 21 are preferably arranged concentrically to one another, but in particular spaced apart from each other in the axial direction or at least overlapping with each adjacent ring 21. In this way, the rings 21 can be arranged along a conical, in particular imaginary, surface.

[0054] The angle plate ring 22 has elongated holes 2 on its edge region facing axially away from the rings 21 and has radially extending round holes 3 in its hollow cylindrical region, i.e., the cylindrical shell-shaped region. Preferably, the elongated holes 2 are spaced apart from the round holes 3 in the circumferential direction. In particular, the elongated holes 2 and the round holes 3 are arranged alternately in the circumferential direction. Thus, in the circumferential direction, a round hole 3 is arranged between each pair of adjacent elongated holes 2. The region covered by the round holes 3 in the axial direction is encompassed by the region covered by the elongated holes 2 in the axial direction.

[0055] The fan cover has radially continuous round holes corresponding to the elongated holes 2 and the round holes 3.

[0056] During the manufacture of the electric motor, before connecting the fan cover 1 to the fan housing 6, a screw 4 is screwed into each corresponding round hole in the fan housing 6, which corresponds to a corresponding elongated hole 2, i.e., is located at the same circumferential position. This aligns the corresponding elongated hole 2 of the fan cover 1 with the screw, allowing the screw 4 to act as a guide during axial sliding. Thus, after axially sliding the fan cover 1 onto the fan housing 6, precise circumferential alignment is achieved. Subsequently, the remaining screws 4 can be screwed through the round holes in the fan cover 1 into the round holes in the fan housing. After tightening all screws 4, the fan cover 1 is precisely aligned with and connected to the fan housing 6.

[0057] Preferably, the number of bridges is more than five, in particular it is eight. Furthermore, preferably more than ten or more than fifteen rings 21 are provided.

[0058] In further embodiments of the invention, each web is made in two parts, the two parts being arranged parallel to each other and each connected to all rings 21 and to the angle plate ring 22, in particular by a material bond. Reference numeral list

[0059] 1 fan cover

[0060] 2 elongated holes

[0061] 3 round holes

[0062] 4 screws

[0063] 5 round holes

[0064] 6 Fan hood

[0065] 20 Bridge

[0066] 21 Ring

[0067] 22 Angle plate ring

Claims

Patent claims:

1. Electric motor with a fan housing assembly, which has a fan cover connected to a fan housing of the fan housing assembly, characterized by the fact that the fan cover has concentrically aligned rings and an angled sheet metal ring also concentrically aligned with the rings, wherein the angle plate ring is arranged radially outside all rings, wherein radially extending webs spaced apart from each other in the circumferential direction are each connected to all rings and the angle plate ring, in particular by a material bond.

2. Electric motor according to claim 1, characterized by the fact that the rings are arranged along a conical surface, in particular an imaginary one, in particular wherein the cone axis of the conical surface is aligned coaxially with the axis of rotation of the rotor shaft of the electric motor.

3. Electric motor according to any of the preceding claims, characterized by the fact that the axial direction is aligned parallel to the direction of the rotation axis of the rotor shaft of the electric motor and / or that the radial direction is related to the axis of rotation of the rotor shaft of the electric motor and / or that the circumferential direction is related to the axis of rotation of the rotor shaft of the electric motor.

4. Electric motor according to any of the preceding claims, characterized by the fact that the rings, in particular all rings, are spaced apart from each other in the axial direction or that the rings are arranged overlapping each other in the axial direction and / or with their nearest adjacent ring or rings.

5. Electric motor according to one of the preceding claims, characterized by the fact that The angle plate ring has a perforated disc-shaped area and an adjacent cylindrical shell-shaped area. or that the angle plate ring has a perforated disc-shaped area and an adjacent conical area, in particular wherein the cone angle of the conical area is equal to the cone angle of the conical surface and / or wherein the conical area is contained in the conical surface.

6. Electric motor according to any of the preceding claims, characterized by the fact that the angle plate ring has elongated holes on its edge area axially away from the rings and has radially through round holes in its hollow cylindrical area, in particular the cylindrical shell-shaped area, in particular wherein the elongated holes are spaced apart from the round holes in the circumferential direction, in particular wherein the elongated holes are arranged alternately with the round holes in the circumferential direction, in particular wherein a round hole is arranged in the circumferential direction between each pair of adjacent elongated holes, in particular wherein the area covered by the round holes in the axial direction is encompassed by the area covered by the elongated holes in the axial direction.

7. Electric motor according to any of the preceding claims, characterized by the fact that the fan housing assembly is made of metal, in particular aluminum or steel.

8. Electric motor according to one of the preceding claims, characterized by the fact that The fan cover is designed as a stamped and bent part.

9. Electric motor according to any of the preceding claims, characterized by the fact that Each bridge has two legs aligned parallel to each other, - which are spaced apart from each other or which are connected to each other at their respective first end area by a yoke.

10. Electric motor according to any of the preceding claims, characterized by the fact that Each leg is connected to each ring, in particular by a material bond, and to the angle plate ring.

11. Electric motor according to any of the preceding claims, characterized by the fact that the legs extend radially or the legs lie against the conical surface.

12. Electric motor according to any of the preceding claims, characterized by the fact that Each bridge protrudes through an opening in the angle bracket ring, wherein the respective yoke of the respective bridge is arranged on the side of the angle plate ring facing away from the rings axially.

13. Electric motor according to any of the preceding claims, characterized by the fact that 14. Electric motor according to one of the preceding claims, characterized in that The webs are evenly spaced from each other in the circumferential direction.

15. Electric motor according to one of the preceding claims, characterized in that the rings are evenly spaced apart from each other in the radial direction.

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