Electric motor having a fan guard and rotor shaft mounted rotatably relative to the fan guard and angle sensor

Patent metadata

Field	Value
Publication number	US-12224651-B2
Application number	US-202017782284-A
Country	US
Kind code	B2
Filing date	Nov 6, 2020
Priority date	Dec 4, 2019
Publication date	Feb 11, 2025
Grant date	Feb 11, 2025

Abstract

An electric motor includes a fan guard and rotor shaft mounted rotatably relative to the fan guard and angle sensor. A housing of the angle sensor is connected to a torque support, which is connected to the fan guard, the torque support having members having a meandering shape.

First claim

The invention claimed is:

1. An electric motor, comprising:
a fan guard;
a rotor shaft mounted rotatably relative to the fan guard;
a torque support connected to the fan guard; and
an angle sensor including a housing connected to the torque support;
wherein the torque support has meandering and/or meander-like webs that repeatedly have an increasing and then decreasing circumferential angle as a radial distance from an axis of rotation of the rotor shaft increases;
wherein each web includes regions that are radially spaced apart from one another in a respective circumferential angle region and/or within the circumferential angle region covered by the web.

2. The electric motor according to claim 1 , wherein the webs are spaced apart from one another in a circumferential direction.

3. The electric motor according to claim 1 , wherein the housing is connected to an inner ring of the torque support by first and second connecting regions of the torque support.

4. The electric motor according to claim 1 , wherein the torque support includes tab regions connected to the fan guard.

5. The electric motor according to claim 1 , wherein the torque support includes radially outwardly projecting tab regions connected to the fan guard.

6. The electric motor according to claim 4 , wherein the housing is connected to an inner ring of the torque support by first and second connecting regions of the torque support, and the tab regions are connected to the inner ring via the webs.

7. The electric motor according to claim 4 , wherein the tab regions are pressed onto the fan guard by a fastener.

8. The electric motor according to claim 7 , wherein the fastener includes a screw.

9. The electric motor according to claim 3 , wherein the inner ring and/or the connecting regions are pressed against the housing of the angle sensor by a screw.

10. The electric motor according to claim 3 , wherein the torque support includes tab regions connected to the fan guard, and the tab regions are spaced from the inner ring and from the connecting regions in a radial direction relative to an axis of rotation of the rotor shaft.

11. The electric motor according to claim 3 , wherein the torque support includes tab regions connected to the fan guard, and the connecting regions are spaced from the tab regions in a circumferential direction.

12. The electric motor according to claim 3 , wherein the torque support includes tab regions connected to the fan guard, and a radial distance region relative to an axis of rotation of the shaft and covered by the web is arranged between or overlaps a radial distance region covered by the tab regions and a radial distance region covered by the connecting regions.

13. The electric motor according to claim 1 , wherein the rotor shaft is rotatably mounted by a bearing accommodated in a bearing flange of the electric motor, and the fan guard is connected to and/or attached to the bearing flange.

14. The electric motor according to claim 1 , wherein the angle sensor includes a shaft that is rotatable relative to the housing of the angle sensor and that is non-rotatably connected to the rotor shaft.

15. The electric motor according to claim 1 , wherein the torque support is arranged as a planar stamped metal sheet component, and a normal to a plane containing the stamped metal sheet component is parallel to an axis of rotation of the rotor shaft.

16. The electric motor according to claim 4 , wherein the tab regions rest parallel against a fan grille of the fan guard.

17. The electric motor according to claim 13 , wherein the housing of the angle sensor is arranged on a side of the fan guard facing away from the bearing flange.

18. The electric motor according to claim 3 , wherein a first end of each web is connected to the inner ring.

19. The electric motor according to claim 10 , wherein a first end of each web is connected to the inner ring and a second end of each web is connected to one of the tab regions.

20. The electric motor according to claim 10 , wherein the webs include:
a first web having a radially inner end connected to a first connecting region of the inner ring and a radially outer end connected to a first one of the tab regions;
a second web having a radially inner end connected to the first connecting region of the inner ring and a radially outer end connected to a second one of the tab regions;
a third web having a radially inner end connected to a second connecting region of the inner ring and a radially outer end connected to the first one of the tab regions; and
a fourth web having a radially inner end connected to the second connecting region of the inner ring and a radially outer end connected to the second one of the tab regions.

21. The electric motor according to claim 20 , wherein the first one of the tab regions is arranged diametrically opposite the second one of the tab regions.

22. The electric motor according to claim 20 , wherein the first connecting region is arranged diametrically opposite the second connecting region.

23. The electric motor according to claim 21 , wherein the first connecting region is arranged diametrically opposite the second connecting region.

Assignees

• Sew Eurodrive Gmbh & Co Kg

Inventors

• Zimmermann Andreas
• Knaus Thomas

Classifications

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• F04D29/703

  specially for fans, e.g. fan guards · CPC title

• H02K11/21 Primary

  Devices for sensing speed or position, or actuated thereby (specially adapted for machines having non-mechanical commutating devices H02K29/06, H02K29/14) · CPC title

• H02K9/06 Primary

  with fans or impellers driven by the machine shaft · CPC title