Driving device, laser measurement device and movable platform

Patent metadata

Field	Value
Publication number	US-11469655-B2
Application number	US-201916665822-A
Country	US
Kind code	B2
Filing date	Oct 28, 2019
Priority date	Apr 28, 2017
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

A driving device includes two rotor assemblies, a stator assembly, and a positioning assembly. Each rotor assembly includes a rotation axis and a rotor. The rotor includes a hollow chamber. The two rotor assemblies include a first rotor assembly and a second rotor assembly, a rotation axis of the first rotor assembly is parallel with a rotation axis of the second rotor assembly, a rotor of the first rotor assembly is at least partially embedded in a chamber of a rotor of the second rotor assembly. The stator assembly is surroundingly disposed at an outer side of the two rotor assemblies and drives a rotor. The rotor driven by the stator assembly causes another rotor of one of the first rotor assembly and the second rotor assembly to rotate. The positioning assembly is located outside of the rotors, and limits the rotors to rotate around corresponding fixed rotation axes.

First claim

What is claimed is:

1. A driving device, comprising:
two rotor assemblies;
a stator assembly; and
a positioning assembly,
wherein each of the two rotor assemblies comprises a rotation axis and a rotor configured to rotate around the rotation axis,
wherein the rotor comprises a hollow chamber having a hollow part configured to receive a load,
wherein the two rotor assemblies comprise a first rotor assembly and a second rotor assembly, a rotation axis of the first rotor assembly is parallel with a rotation axis of the second rotor assembly, a rotor of the first rotor assembly is at least partially embedded in a chamber of a rotor of the second rotor assembly,
wherein the stator assembly is surroundingly disposed at an outer side of at least one of the two rotor assemblies and is configured to drive a rotor of one of the first rotor assembly and the second rotor assembly,
wherein the rotor driven by the stator assembly is configured to cause a rotor of the other one of the first rotor assembly and the second rotor assembly to rotate, and
wherein the positioning assembly is located at an outer side of the rotors of the two rotor assemblies, and is configured to limit the rotors to respectively rotate around corresponding fixed rotation axes.

2. The driving device of claim 1 , wherein the positioning assembly comprises a first positioning assembly and a second positioning assembly, the first positioning assembly and the second positioning assembly are respectively located at an outer side of a corresponding rotor to limit the corresponding rotor to rotate around a corresponding rotation axis.

3. The driving device of claim 2 , wherein the rotor of the first rotor assembly and the rotor of the second rotor assembly are configured to transmit through contact, and the rotor of the first rotor assembly and the rotor of the second rotor assembly have the same linear velocity at a contacting point.

4. The driving device of claim 3 , wherein a friction pad is disposed between the rotor of the first rotor assembly and the rotor of the second rotor assembly, and the rotor of the first rotor assembly and the rotor of the second rotor assembly are transmissively connected through a friction force of the friction pad.

5. The driving device of claim 3 , wherein the rotor of the first rotor assembly and the rotor of the second rotor assembly are configured with meshing transmission at the contracting point.

6. The driving device of claim 1 ,
wherein the stator assembly comprises a ring-shaped stator surroundingly disposed at an outer side of at least one of the rotors of the two rotor assemblies, or
wherein the stator assembly comprises at least two separately disposed stators that are axially symmetric or center symmetric relative to the rotation axis of the first rotor assembly or the rotation axis of the second rotor assembly.

7. The driving device of claim 2 , wherein the rotor of the first rotor assembly comprises a first rotation member that is disposed in an axial direction and embedded in the chamber of the second rotor assembly, and a second rotation member that is not embedded in the chamber.

8. The driving device of claim 7 ,
wherein the first positioning assembly is located at an outer side of the second rotation member,
wherein the second positioning assembly is located at an inner side of the stator assembly, and is disposed separate from the stator assembly, and
wherein the second positioning assembly and the stator assembly are orderly disposed in an axial direction of the rotation axis of the first rotor assembly or the rotation axis of the second rotor assembly, and the first positioning assembly and the second positioning assembly are respectively located at two sides of the stator assembly in the axial direction.

9. The driving device of claim 8 ,
wherein the second positioning assembly comprises at least two positioning members, the at least two positioning members are disposed to be axially symmetric or center symmetric relative to the rotation axis of the first rotor assembly or the rotation axis of the second rotor assembly, and
wherein the second positioning assembly comprises a ring-shaped positioning member.

10. The driving device of claim 8 , wherein the stator assembly comprises at least two stators, the second positioning assembly comprises at least two positioning members, the at least two stators and the at least two positioning members are at least partially alternately disposed around the rotation axis of the first rotor assembly or the rotation axis of the second rotor assembly.

11. The driving device of claim 10 ,
wherein a stator is disposed between two adjacent positioning members, and/or
wherein a positioning member is disposed between two adjacent stators.

12. The driving device of claim 1 , wherein each rotor comprises a magnet yoke and at least one magnet fixedly connected with the magnet yoke, the at least one magnet surroundingly disposed at an outer side of the magnet yoke.

13. The driving device of claim 12 ,
wherein the at least one magnet is disposed at an outer circumferential surface of the magnet yoke, and
wherein the at least a portion of the magnet yoke is located at an inner side of the stator assembly.

14. The driving device of claim 1 , wherein each rotor comprises at least one magnet, the at least one magnet and the stator assembly are orderly disposed in a direction along the rotation axis of the first rotor assembly or the rotation axis of the second rotor assembly.

15. The driving device of claim 14 , wherein each rotor comprises a magnet yoke coupled with the at least one magnet, the magnet yoke comprises a first portion and a second portion coupled with the first portion, and the first portion is coupled with the at least one magnet.

16. The driving device of claim 15 ,
wherein the first portion is configured to extend in an axial direction of the rotation axis of the first rotor assembly or an axial direction of the rotation axis of the second rotor assembly,
wherein the second portion is configured to extend in a radial direction of the rotation axis of the first rotor assembly or a radial direction of the rotation axis of the second rotor assembly, and
wherein the first portion of the magnet yoke forms the hollow part.

17. The driving device of claim 15 ,
wherein the second portion is configured to extend a side of the stator assembly facing the rotation axis of the first rotor assembly or the rotation axis of the second rotor assembly, and
wherein the second portion of the magnet yoke forms the hollow part, or the first portion of the magnet yoke forms the hollow part.

18. The driving device of claim 1 ,
wherein each rotor comprises at least one magnet, the at least one magnet is located at an inner side of the stator assembly, and
wherein each rotor comprises a magnet yoke coupled with the at least one magnet, the magnet yoke comprises a first portion configured to surround the rotation axis of the first rotor assembly or the rotation axis of the second rotor assembly, and a second portion coupled with the first portion, and
wherein the first portion is coupled with the at least one magnet, and the second portion is configured to extend to a side of the positioning assembly facing the rotation axis of the first rotor assembly or the rotation axis of the second rotor assembly.

19. A laser measurement device, comprising:
an emitter configured to emit a light beam;
a receiving unit configured to receive the light beam; and
a driving device comprising:

Assignees

• Sz Dji Technology Co Ltd

Inventors

• Li Zheyang
• Huang Huai
• Zhao Jin
• Hong Xiaoping
• Wang Peng

Classifications

• G02B7/1805 Primary

  for prisms (G02B7/181 takes precedence) · CPC title

• G02B27/0972

  Prisms (prisms per se G02B5/04) · CPC title

• G02B26/10

  Scanning systems · CPC title

• 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

• G02B26/108

  having one or more prisms as scanning elements · CPC title