Gear motor having a gearing system, an electric motor, and an adapter

Patent metadata

Field	Value
Publication number	US-12009728-B2
Application number	US-202017618673-A
Country	US
Kind code	B2
Filing date	Jun 3, 2020
Priority date	Jun 11, 2019
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A gear motor includes a gearing system, an electric motor, and an adapter. The adapter is situated between the electric motor and the gearing system, the adapter has an adapter shaft, the adapter shaft is at least partially inserted into an input shaft of the gearing system, the adapter shaft is connected to the input shaft in a torsionally fixed manner with the aid of a bellows, and a sealing ring is situated between the adapter shaft and the input shaft.

First claim

The invention claimed is:

1. A gear motor, comprising:
a gearing system including an input shaft;
an electric motor;
an adapter arranged between the electric motor and the gearing system and including an adapter shaft at least partially inserted into the input shaft of the gearing system and connected to the input shaft of the gearing system in a torsionally fixed manner with the aid of a bellows; and
a sealing ring arranged between the adapter shaft and the input shaft;
wherein the sealing ring touches the input shaft at a front in an axial direction, the adapter shaft counter to the axial direction, the input shaft in a radially outward-facing direction, and the adapter shaft in a radially inward-facing direction.

2. The gear motor according to claim 1 , wherein the input shaft is integrally formed and/or formed as one part and/or the adapter shaft is integrally formed and/or formed as one part.

3. The gear motor according to claim 1 , wherein the adapter shaft includes a step at an outer circumference, the input shaft has a stepped bore, and the sealing ring is arranged axially between the step of the adapter shaft and a step of the stepped bore.

4. The gear motor according to claim 3 , wherein the sealing ring in particular is arranged on the adapter shaft.

5. The gear motor according to claim 3 , wherein a region covered by the sealing ring in an axial direction and/or in a direction of an axis of rotation of the input shaft is encompassed by a region covered by the bellows in the axial direction.

6. The gear motor according to claim 1 , wherein the adapter shaft has a hollow configuration, a motor shaft and/or a rotor of the electric motor is at least partially inserted into the adapter shaft, and a clamping ring is placed on the adapter shaft for a friction-locked connection of the adapter shaft to the motor shaft and/or the rotor.

7. The gear motor according to claim 6 , wherein the clamping ring includes an axially uninterrupted slot.

8. The gear motor according to claim 7 , wherein a screws is arranged through the slot and is arranged as a tangentially directed screw that compresses the clamping ring to narrow the slot.

9. The gear motor according to claim 1 , wherein the bellows is welded to the adapter shaft and to the input shaft, the adapter shaft includes a radially protruding projection to which the bellows is connected by a weld, the input shaft including a radially protruding projection to which the bellows is connected by a weld.

10. The gear motor according to claim 1 , wherein an outer ring of a bearing is accommodated in a flange part of the gearing system, an inner ring of the bearing is arranged on the input shaft, and the inner ring is positioned and/or pressed against a radially protruding projection arranged on the input shaft.

11. The gear motor according to claim 10 , wherein the bearing is arranged as a roller bearing and/or a ball bearing, the flange part includes a bearing flange, a shaft sealing ring accommodated in the flange part seals against the input shaft, a sealing lip of the shaft sealing ring touches the input shaft, and the shaft sealing ring is arranged on a side of the bearing facing away from the bellows.

12. The gear motor according to claim 10 , wherein the bearing is axially set apart from the bellows and is lubricated by grease.

13. The gear motor according to claim 10 , wherein a housing part of the adapter is connected to the flange part and to a housing part of the gearing system, the housing part of the adapter is arranged between the housing part of the gearing system and the flange part, and the housing part of the adapter radially surrounds a clamping ring.

14. The gear motor according to claim 1 , wherein a region covered by the bellows in an axial direction encompasses a region covered by the sealing ring in the axial direction and encompasses a region between two steps covered in the axial direction.

15. The gear motor according to claim 1 , wherein a radial clearance region covered by the bellows is set apart from a radial clearance region covered by the sealing ring.

16. The gear motor according to claim 1 , wherein a region covered by the adapter shaft in an axial direction encompasses a region covered by the bellows in the axial direction.

17. The gear motor according to claim 1 , wherein the sealing ring touches a step of the adapter shaft, a step of the input shaft, a wall of a stepped bore in the input shaft, and a cylindrical circumference of the adapter shaft.

18. The gear motor according to claim 1 , wherein a sun gear arranged as a pinion is arranged in the input shaft on a side facing axially away from the adapter shaft and connected to the input shaft in a torsionally fixed manner; and
wherein (a) the input shaft is arranged as a hollow shaft and sealed with the aid of the sun gear against an interior space of the gearing system filled at least partially with oil or (b) the input shaft is arranged as a solid shaft.

19. The gear motor according to claim 18 , wherein the sun gear meshes with planet wheels and/or planet gears.

20. The gear motor according to claim 18 , wherein the sun gear includes a helical gearing that meshes with helical gearings of planet wheels and/or planet gears.

21. The gear motor according to claim 1 , the sealing ring is arranged as an O-ring and/or is formed of an elastomer and/or rubber.

22. The gear motor according to claim 1 , wherein the adapter shaft is arranged as a hollow adapter shaft, and the sealing ring is arranged between the hollow adapter shaft and the input shaft to seal a spatial region surrounded by the hollow adapter shaft against the input shaft, the spatial region surrounded by the hollow adapter shaft against the input shaft being connected to a spatial region accommodating the bellows via a gap that is provided between a motor shaft and the adapter shaft.

23. A gear motor, comprising:
a gearing system including an input shaft;
an electric motor;
an adapter arranged between the electric motor and the gearing system and including an adapter shaft at least partially inserted into the input shaft of the gearing system and connected to the input shaft of the gearing system in a torsionally fixed manner with the aid of a bellows; and
a sealing ring arranged between the adapter shaft and the input shaft;
wherein the sealing ring touches a step of the adapter shaft, a step of the input shaft, a wall of a stepped bore in the input shaft, and a cylindrical circumference of the adapter shaft.

Assignees

• Sew Eurodrive Gmbh & Co Kg

Inventors

• Wöppermann Markus
• Schillinger Jens
• Hannet Stefan

Classifications

• H02K7/003

  Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28) · CPC title

• F16D2300/08

  Details or arrangements of sealings not provided for in group F16D3/84 · CPC title

• F16D1/0864

  due to tangential loading of the hub, e.g. a split hub · CPC title

• F16D1/0847

  with radial clamping due to a radial screw · CPC title

• H02K7/116 Primary

  with gears · CPC title