Driving device and sear adjusting mechanism for vehicle

Patent metadata

Field	Value
Publication number	US-9969303-B2
Application number	US-201715441676-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Mar 9, 2016
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A driving device and a seat adjusting mechanism for vehicle are provided. The driving device includes a motor and a gearbox. The gearbox includes a worm and a worm gear. The worm is fixedly connected to an output shaft of the motor. The gearbox further includes first and second driving gears, and first and second driven gears. The first and second driving gears are coaxially fixed to the worm gear and located at two sides of the worm gear, respectively. The first and second driven gears are fixed coaxially with each other and engaged with the first and second driving gears, respectively. Two driving gears are arranged at the two sides of the worm gear symmetrically, and two driven gears are also arranged at the two sides of the worm gear symmetrically, which results in a compact structure and reduced volume of the driving device.

First claim

The invention claimed is:

1. A driving device comprising:
a motor comprising an output shaft; and
a gearbox comprising:
a worm coaxially fixed to the output shaft of the motor;
a worm gear engaged with the worm;
a first driving gear and a second driving gear coaxially fixed to the worm gear and located at two sides of the worm gear, respectively; and
a first driven gear and a second driven gear fixed coaxially with each other and engaged with the first driving gear and the second driving gear, respectively.

2. The driving device of claim 1 , wherein the first driving gear and the second driving gear are arranged at two sides of the worm gear symmetrically.

3. The driving device of claim 2 , wherein the first driven gear and the second driven gear are arranged at the two sides of the worm gear symmetrically.

4. The driving device of claim 1 , wherein a distance between end faces of the first driving gear and the second driving gear away from the worm gear is equal to or greater than a distance between end faces of the first driven gear and the second driven gear away from the worm gear.

5. The driving device of claim 1 , wherein a housing of the gearbox comprises a housing main body and a housing cover locked together, the housing main body is a chamber with an opening, the housing cover is covered on the opening, and the worm, the worm gear, the first driving gear, the second driving gear, the first driven gear and the second driven gear are received in the chamber.

6. The driving device of claim 5 , wherein a bearing is mounted around the output shaft of the motor between the worm and the motor, and the housing main body comprises a bearing seat for mounting the bearing.

7. The driving device of claim 1 , wherein the first driving gear and the second driving gear are formed as an integral piece, and the worm gear is fixed to or one-piece formed with the integral piece.

8. The driving device of claim 7 , wherein the worm gear comprises a hub connected to the integral piece, a connecting plate extending radially and outwardly from the hub, and an outer ring fixed to an outer edge of the connecting plate, teeth of the worm gear are formed on the outer ring, and the connecting plate fauns a plurality of reinforcing ribs.

9. The driving device of claim 8 , wherein the connecting plate forms a first reinforcing ring, the first reinforcing ring surrounds the hub and is located between the hub and the outer ring, and the reinforcing ribs are connected between the hub and the first reinforcing ring.

10. The driving device of claim 8 , wherein a second reinforcing ring is further formed on an outer side of the hub, and the reinforcing ribs extend outwardly from the second reinforcing ring.

11. The driving device of claim 8 , wherein two sides of the connecting plate have the same construction.

12. The driving device of claim 7 , wherein a positioning portion protrudes from a junction of the integral piece of the first driving gear and the second driving gear, and an inner side of the worm gear wraps the positioning portion.

13. The driving device of claim 1 , wherein a ratio of a height of the gearbox to a thickness of the motor is greater than or equal to 0.8 and less than or equal to 1.2.

14. The driving device of claim 1 , wherein each of the first driven gear and second driven gear comprises a driven gear hub, a driven gear connecting plate extending radially and outwardly from the driven gear hub, and a driven gear outer ring fixed to an outer edge of the driven gear connecting plate, teeth of each driven gear are formed on a circumferential surface of the driven gear outer ring, and a side of each driven gear connecting plate away from the worm gear forms a plurality of second reinforcing ribs.

15. The driving device of claim 14 , wherein the side of each driven gear connecting plate away from the worm gear forms a third reinforcing ring, and the third reinforcing ring surrounds the driven gear hub and is located between the driven gear hub and the driven gear outer ring.

16. The driving device of claim 14 , wherein end faces of the first driven gear and the second driven gear close to each other are substantially planar and parallel to each other, a receiving space is defined between the end faces to receive the worm gear.

17. A seat adjusting mechanism for vehicle, comprising a driving device, the driving device comprising:
a motor; and
a gearbox comprising:
a worm fixedly connected to an output shaft of the motor and rotating coaxially along with the output shaft of the motor;
a worm gear engaged with the worm;
a first driving gear and a second driving gear being coaxially fixed to the worm gear and located at two sides of the worm gear, respectively; and
a first driven gear and a second driven gear being fixed coaxially with each other and engaged with the first driving gear and the second driving gear, respectively.

Assignees

• Johnson Electric Sa

Inventors

• Ta Jing Ning
• Zhao Yong Jun
• Li Qiu Mei

Classifications

• F16H1/206

  characterised by the driving or driven member being composed of two or more gear wheels · CPC title

• B60N2/2231 Primary

  Worm and worm gear articulations · CPC title

• B60N2/0232

  Operations & Transport · mapped topic

• F16H1/203

  with non-parallel axes (F16H1/22 takes precedence) · CPC title

• B60N2002/0236

  Operations & Transport · mapped topic