Internal ring gear, driving assembly and application device

Patent metadata

Field	Value
Publication number	US-10495206-B2
Application number	US-201715679855-A
Country	US
Kind code	B2
Filing date	Aug 17, 2017
Priority date	Aug 22, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

The present disclosure provides an internal ring gear, a driving assembly having the internal ring gear, and an application device employing the driving assembly. The internal ring gear includes at least two ring gears integrally arranged in parallel at an inner surface of a single housing.

First claim

The invention claimed is:

1. An internal ring gear comprising:
a housing; and
at least two internal ring gears integrally arranged at an inner surface of the housing, wherein the outer surface of the housing is smooth, and a diameter of the outer surface of the housing is consistent; the housing and the internal ring gears being a one piece monolithic integral unit made of powder metal material.

2. The internal ring gear of claim 1 , comprising: a helical ring gear and a spur ring gear, the teeth of the helical ring gear are disposed at an oblique angle with respect to an axial direction of the housing, and the teeth of the spur ring gear are disposed along the axial direction of the housing.

3. The internal ring gear of claim 1 , wherein the powder metal material has a density less than 92% of its theoretical density, and a mass of 6.0 to 8.0 grams per cubic millimeter.

4. A driving assembly comprising:
a motor; and
a gearbox comprising an internal ring gear, the internal ring gear comprising
a housing; and
at least two ring gears integrally arranged at an inner surface of the housing, wherein the outer surface of the housing is smooth, and a diameter of the outer surface of the housing is consistent; the housing and the internal ring gears being a one piece monolithic integral unit made of powder metal material.

5. The driving assembly of claim 4 , wherein the internal ring gears comprises a helical ring gear and a spur ring gear, the teeth of the helical ring gear are disposed at an oblique angle with respect to an axial direction of the housing, and the teeth of the spur ring gear are disposed along the axial direction of the housing.

6. The driving assembly of claim 4 , wherein the s powder metal material has a density less than 92% of its theoretical density, and a mass of 6.0 to 8.0 grams per cubic millimeter.

7. The driving assembly of claim 4 , wherein mounting structures are provided at two end portions of the internal ring gear, the mounting structure at one of the two end portions is configured to mount the internal ring gear to the motor, and the mounting structure at the other of the two end portions is configured to mount the internal ring gear to a mounting seat of the driving assembly.

8. The driving assembly of claim 7 , wherein the gearbox is directly fixed mounted to the mounting seat, and the mounting seat is connected with a load.

9. The driving assembly of claim 4 , wherein positioning structures are provided at two end portions of the internal ring gear, the positioning structure at one of the two end portions is configured to position the internal ring gear relative to the motor, and the positioning structure at the other of the two end portions is configured to position the internal ring gear relative to the mounting seat.

10. The driving assembly of claim 5 , wherein the gearbox comprises a first planetary gear train and a second planetary gear train, the first planetary gear train is a helical gear train including the helical ring gear, and the second planetary gear train is a spur gear train including the spur ring gear.

11. An application device comprising a driving assembly, the driving assembly comprising:
a motor; and
a gearbox comprising an internal ring gear, the internal ring gear comprising
a housing;
and at least two ring gears integrally arranged at an inner surface of the housing, wherein the outer surface of the housing is smooth, and a diameter of the outer surface of the housing is consistent; the housing and the internal ring gears being a one piece monolithic integral unit made of powder metal material.

12. The application device of claim 11 , wherein the application device is a lawnmower or a power lifting door for vehicle.

13. The application device of claim 11 , comprising: a helical ring gear and a spur ring gear, the teeth of the helical ring gear are disposed at an oblique angle with respect to an axial direction of the housing, and the teeth of the spur ring gear are disposed along the axial direction of the housing.

14. The application device of claim 11 , wherein the powder metal material has a density less than 92% of its theoretical density, and a mass of 6.0 to 8.0 grams per cubic millimeter.

Assignees

• Johnson Electric Int Ag

Inventors

• Zhu Xiu Hua
• WU Chang Qiao
• Wang Xiao Hui
• Looi Wan Hor
• Ta Jing Ning

Classifications

• F16H55/17

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

• F16H2055/176

  Ring gears with inner teeth · CPC title

• F16H57/08

  of gearings with members having orbital motion · CPC title

• F16H55/06 Primary

  Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties · CPC title

• F16H57/0006

  Vibration-damping or noise reducing means specially adapted for gearings (devices for varying tension of belts, ropes or chains with damping means F16H7/0829; toothed members with construction providing vibration damping F16H55/14; reducing vibrations or noise of the gearbox casing F16H57/028; suppression of vibrations or noise of gear selectors F16H59/0208; control of hydrostatic fluid gearing preventing or reducing vibrations or noise F16H61/4183) · CPC title