Motor, gimbal having the motor, and image capturing device having the gimbal

• US 10,488,739 B2
• Filed: 07/03/2014
• Issued: 11/26/2019
• Est. Priority Date: 02/28/2014
• Status: Active Grant

• Current Assignee: SZ DJI Technology Co., Ltd. (d/b/a DJI) (iFlight Technology Company Limited)
• Original Assignee: SZ DJI Technology Co., Ltd. (d/b/a DJI) (iFlight Technology Company Limited)
• Inventors: Zhou, Li, Wang, Peng
• Primary Examiner(s): LaBalle, Clayton E.
• Assistant Examiner(s): Hancock, Dennis
• Application Number:
  US15/115,422
• Publication Number:
  US 20170176840A1
• Time in Patent Office: 1,972 Days
• Field of Search: 396428
• CPC Class Codes: F16M 11/06 allowing pivoting
• CPC Class Codes: F16M 11/18 with mechanism for moving the apparatus relatively to the stand
• CPC Class Codes: F16M 2200/041 for balancing rotational movement of the head
• CPC Class Codes: G03B 17/561 Support related camera accessories
• CPC Class Codes: H02K 1/27 Rotor cores with permanent magnets
• CPC Class Codes: H02K 11/215 Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• CPC Class Codes: H02K 29/08 using magnetic effect devices, e.g. Hall-plates, magneto-resistors H02K29/12 takes precedence
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

The present invention discloses a motor comprising a stator, a rotator rotatably connected with the stator and an electrical connector that provides an electric signal to the motor. The motor further comprises a magnet fixed on the rotator and a Hall angular displacement sensor fixed on the electrical connector and arranged opposite to the magnet. The magnet and the Hall angular displacement sensor are spaced from each other by the electrical connector. The present invention further discloses a gimbal using the motor and an image capturing device using the gimbal.

Claims

1. A gimbal comprising:

a first rotating member;

a second rotating member rotatably connected with the first rotating member; and

a motor configured to drive the second rotating member to rotate with respect to the first rotating member, wherein the motor comprises;

a stator fixed directly to the first rotating member;

a rotator rotatably connected with the stator and fixed directly on the second rotating member, wherein the rotator comprises;

a rotating shaft assembly rotatably connected with the stator, the rotating shaft assembly comprising a rotating shaft, an upper bearing sleeved on an upper end of the rotating shaft, and a lower bearing sleeved on a lower end of the rotating shaft; and

a rotor directly fixed to a first end of the rotating shaft;

an electrical connecting device configured to provide an electric signal to the motor;

a magnet directly affixed to a second end of the rotating shaft, the first end and the second end being two opposite ends of the rotating shaft; and

a Hall angular displacement sensor fixed on a side of the electrical connecting device that faces away from the magnet, with no Hall displacement sensor placed on another side of the electrical connecting device that faces the magnet;

wherein the stator is located between the magnet and the rotor in a length direction of the rotating shaft.

2. The gimbal of claim 1, wherein the rotor surrounds at least a portion of the stator.

3. The gimbal of claim 1, wherein:

the electrical connecting device comprises a first surface and a second surface opposite to the first surface;

the Hall angular displacement sensor is fixedly arranged on the first surface;

the magnet is arranged opposite to the second surface; and

the magnet is out of contact with the Hall angular displacement sensor.

4. The gimbal of claim 1, wherein the electrical connecting device is a PCB board or a flexible circuit board.

5. An image capturing device comprising:

a payload; and

a gimbal configured to carry the payload, the gimbal comprising;

a first rotating member;

a second rotating member rotatably connected with the first rotating member; and

a motor configured to drive the second rotating member to rotate with respect to the first rotating member, wherein the motor comprises;

a stator fixed directly to the first rotating member;

a rotator rotatably connected with the stator and fixed directly on the second rotating member, wherein the rotator comprises;

a rotating shaft assembly rotatably connected with the stator, the rotating shaft assembly comprising a rotating shaft, an upper bearing sleeved on an upper end of the rotating shaft, and a lower bearing sleeved on a lower end of the rotating shaft; and

a rotor directly fixed to a first end of the rotating shaft;

an electrical connecting device configured to provide an electric signal to the motor;

a magnet directly affixed to a second end of the rotating shaft, the first end and the second end being two opposite ends of the rotating shaft; and

a Hall angular displacement sensor fixed on a side of the electrical connecting device that faces away from the magnet, with no Hall displacement sensor placed on another side of the electrical connecting device that faces the magnet;

wherein the stator is located between the magnet and the rotor in a length direction of the rotating shaft.

6. The image capturing device of claim 5, wherein the payload is connected with the second rotating member.

7. The image capturing device of claim 5, wherein the payload is a camera.

8. The image capturing device of claim 5, wherein the rotor surrounds at least a portion of the stator.

9. The image capturing device of claim 5, wherein:

the electrical connecting device comprises a first surface and a second surface opposite to the first surface;

the Hall angular displacement sensor is fixedly arranged on the first surface;

the magnet is arranged opposite to the second surface; and

the magnet is out of contact with the Hall angular displacement sensor.

10. The image capturing device of claim 5, wherein the electrical connecting device is a PCB board or a flexible circuit board.