Geared motor

Patent metadata

Field	Value
Publication number	US-11732777-B2
Application number	US-202017424336-A
Country	US
Kind code	B2
Filing date	Jan 13, 2020
Priority date	Jan 21, 2019
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A geared motor includes a pinion connected to a shaft in a positive manner. A pinion tooth system of the pinion meshes with a tooth system of a gear wheel. In relation to the axis of rotation of the gear wheel, the contact region between the pinion and the shaft radially overlaps, e.g., truly overlaps, with the meshing region, e.g., the tooth system with the pinion tooth system.

First claim

The invention claimed is:

1. A geared motor, comprising: a gear wheel including a tooth system; a shaft; a pinion positively connected to the shaft and including a pinion tooth system meshing with the tooth system of the gear wheel; wherein a contact region between the pinion and the shaft overlaps, in a radial direction relative to an axis of rotation of the gear wheel, with a meshing region of the tooth system of the gear wheel and the pinion tooth system, and/or a radial distance range of the contact region between the pinion and the shaft overlaps, relative to the axis of rotation of the gear wheel, with a radial distance range of the tooth system of the gear wheel; wherein a greatest radial extent of the contact region is smaller than a greatest radial extent of the tooth system of the gear wheel; wherein a free space between the pinion and the shaft radially overlaps with the tooth system of the gear wheel in relation to the axis of rotation of the gear wheel; and wherein a region of the pinion in a shape of an inner cone restricts the free space, and a concave region of the shaft in a shape of a body of revolution and/or in the shape of an outer cone restricts the free space.

2. The geared motor according to claim 1 , wherein the axis of rotation of the gear wheel is arranged perpendicular to an axis of rotation of the shaft, and/or the axis of rotation of the gear wheel is set apart from the axis of rotation of the shaft.

3. The geared motor according to claim 2 , wherein a non-vanishing axial offset exists in as gear unit that includes the gear wheel and the pinion.

4. The geared motor according to claim 1 , wherein the radial distance range of the tooth system of the gear wheel relative to the axis of rotation of the gear wheel overlaps with a radial distance range of a free space arranged between the pinion and the shaft relative to the axis of rotation of the gear wheel.

5. The geared motor according to claim 1 , wherein the radial clearance range covered by the contact region relative to the axis of rotation of the gear wheel abuts a radial clearance range covered by a free space arranged between the pinion and the shaft relative to the axis of rotation of the gear wheel.

6. The geared motor according to claim 1 , wherein the free space terminates in the environment in an end region of the pinion facing away from the gear wheel.

7. The geared motor according to claim 1 , wherein a rotation-symmetric axis of the concave region in a shape of a body of revolution and the region in a shape of an inner cone coincide with the axis of rotation of the shaft.

8. The geared motor according to claim 1 , wherein and a cylindrical region of the shaft restricts the free space in an axial direction relative to the axis of rotation of the gear wheel.

9. The geared motor according to claim 1 , wherein a region of the pinion that includes a region in the shape of the inner cone and an adjoining cylindrical region restricts the free space in an axial direction, and a region of the shaft that includes the concave region in the shape of the body of revolution and an adjoining cylindrical region restricts the free space counter to the axial direction.

10. The geared motor according to claim 1 , wherein the tooth system of the gear wheel includes a spiroid tooth system or a crown gear.

11. The geared motor according to claim 1 , wherein the gear wheel includes a hollow-cylindrical base body, and the tooth system of the gear wheel is arranged on a side of the gear wheel.

12. The geared motor according to claim 11 , wherein the tooth system of the gear wheel is arranged as a plane tooth system.

13. The geared motor according to claim 11 , wherein a cone-shaped hub region is premolded and/or arranged on a side of the gear wheel axially facing away from the tooth system of the gear wheel relative to the axis of rotation of the gear wheel.

14. The geared motor according to claim 1 , wherein the radial distance range of the tooth system of the gear wheel is set apart from the axis of rotation of the gear wheel.

15. The geared motor according to claim 1 , wherein the shaft is arranged as a rotor shaft of a converter-fed three-phase motor.

16. The geared motor according to claim 1 , wherein the shaft is formed of one part.

17. The geared motor according to claim 1 , wherein the shaft is formed of multiple parts.

18. A geared motor, comprising: a gear wheel including a tooth system; a shaft; a pinion positively connected to the shaft and including a pinion tooth system meshing with the tooth system of the gear wheel; wherein a radial distance range of the contact region between the pinion and the shaft overlaps, relative to an axis of rotation of the gear wheel, with a radial distance range of the tooth system of the gear wheel; wherein a greatest radial extent of the contact region is smaller than a greatest radial extent of the tooth system of the gear wheel; wherein a free space between the pinion and the shaft radially overlaps with the tooth system of the gear wheel in relation to the axis of rotation of the gear wheel; and wherein a region of the pinion in a shape of an inner cone restricts the free space, and a concave region of the shaft in a shape of a body of revolution and/or in the shape of an outer cone restricts the free space.

Assignees

• Sew Eurodrive Gmbh & Co Kg

Inventors

• Herberger Michael Josef

Classifications

• F16H1/12 Primary

  with non-parallel axes · CPC title

• F16H55/17

  Toothed wheels (worm wheels F16H55/22; chain wheels F16H55/30) · CPC title

• F16H2055/173

  Crown gears, i.e. gears have axially arranged teeth · CPC title

• F16H57/0025 Primary

  with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods · CPC title

• F16H1/125

  comprising spiral gears only · CPC title