ROTATION LIMITING DEVICE

• US 20170160765A1
• Filed: 02/16/2017
• Published: 06/08/2017
• Est. Priority Date: 08/29/2014
• 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: ZHAO, Xifeng
• Granted Patent: US 10,209,733 B2
• Time in Patent Office: Days
• CPC Class Codes: F16D 71/00 Mechanisms for bringing members to rest in a predetermined position combined with or controlling clutches F16D43/26; means for initiating operation of brakes at a predetermined position F16D65/14; means for securing members after operation F16B1/02
• CPC Class Codes: G05G 5/04 Stops for limiting movement of members, e.g. adjustable stop G05G5/03, G05G5/05, G05G5/28 take precedence

Abstract

The present invention provides a rotation limiting device. The rotation limiting device includes a base; a rotator capable of rotating relative to the base; and a rotating shaft slidably connected between the base and the rotator. A spiral groove is provided on one of the base and the rotator, and a stripe groove opposite to the spiral groove is provided on the other one of the base and the rotator, two ends of the rotating shaft are slidahly connected respectively in the spiral groove and the stripe groove, and the rotator is rotated to cause the rotating shaft to slide from starting positions of the spiral groove and the stripe groove to terminal positions of the spiral groove and the stripe groove, such that a rotation angle of the rotator is greater than 360°.

Claims

1. A rotation limiting device, comprising:

a base;

a rotator capable of rotating relative to the base; and

a rotating shaft slidably connected between the base and the rotator, wherein;

a spiral groove is provided on one of the base add the rotator, and a stripe groove opposite to the spiral groove is provided on the other one of the base and the rotator,

an angle of the spiral groove rotating from a starting position to a terminal position is greater than 360°

, and

one end of the rotating shaft is slidably received in the spiral groove, and the other end of the rotating shaft is slidably received in the stripe groove.

2. The rotation limiting device of claim 1, wherein the spiral groove is provided on a surface of the base and spirally rotates approximately 480°

with a center of the base as a center of a circle of rotation.

3. The rotation limiting device of claim 2, wherein:

two ends of the rotating shaft are respectively sleeved with two bearings,

the bearing at one end is slidably received in the spiral groove, and

the bearing at the other end is slidably received in the stripe groove.

4. The rotation limiting device of claim 1, wherein:

the spiral groove and the stripe groove is disposed face to face, and

a terminal position of the spiral groove and a terminal position of the stripe groove are opposite perpendicularly.

5. The rotation limiting device of claim 1, wherein:

a first connecting hole is provided at a center of the base,

a second connecting hole is provided at a center of the rotator, and

a connecting shaft is fixed in the first connecting hole of the base and is rotatably connected in the second connecting bole of the rotator.

6. The rotation limiting device of claim 5, wherein two bearings are sleeved on the connecting shaft and mounted in the second connecting hole of the rotator.

7. The rotation limiting device of claim 5, wherein

a starting position of the spiral groove is close to the first connecting hole of the base,

a terminal position of the spiral groove is distant from the first connecting hole, and

a line connecting the starting position and the terminal position of the spiral groove passes through the first connecting hole.

8. The rotation limiting device of claim 5, wherein

a starting position of the stripe groove is close to the second connecting hole of the rotator,

a terminal position of the stripe groove is distant from the second connecting hole, and

a line connecting the starting position and the terminal position of the stripe groove extends along a radial direction of the rotator.

9. The rotation limiting device of claim 5, wherein:

the first connecting hole is a stepped hole and comprises three hole segments with different diameters, a first hole, a second hole, and a third hole, in sequence;

the first hole and the third hole is disposed on two ends the second hole; and

a diameter of the second hole is less than a diameters of the first hole and a diameters of the third hole, such that two shoulders are formed on the two ends of the second hole.

10. The rotation limiting device of claim 9, wherein the two hole and the spiral groove are on a same surface.

11. A rotation limiting device, comprising:

a base;

a rotator capable of rotating relative to the base; and

a rotating shaft slidably connected between the base and the rotator, wherein;

a spiral groove is provided on one of the base and the rotator, and a stripe groove opposite to the spiral groove is provided on the other one of the base and the rotator,

two ends of the rotating shaft are slidably connected respectively in the spiral groove and the stripe groove, and

the rotator is rotated to cause the rotating shaft to slide from starting positions of the spiral groove and the stripe groove to termninal positions of the spiral groove and the stripe groove, such that a rotation angle of the rotator is greater than 360°

.

12. The rotation limiting device of claim 11, wherein the spiral groove is provided on a surface of the base and spirally rotates approximately 480°

with a center of the base as a center of a circle of the rotation.

13. The rotation limiting device of claim 11, wherein:

two ends of the rotating shaft are respectively sleeved with two bearings,

the bearing at one end is slidably received in the spiral groove, and

the bearing at the other end is slidably received in the stripe groove.

14. The rotation limiting device of claim 11, wherein:

the spiral groove and the stripe groove is disposed face to face, and

a terminal position of the spiral groove and a terminal position of the stripe groove are opposite perpendicularly.

15. The rotation limiting device of claim 11, wherein:

a first connecting hole is provided at a center of the base,

a second connecting hole is provided at a center of the rotator, and

a connecting shaft is fixed in the first connecting hole of the base and is rotatably connected in the second connecting hole of the rotator.

16. The rotation limiting device of claim 15, wherein two bearings are sleeved on the connecting shaft and mounted in the second connecting bole of the rotator.

17. The rotation limiting device of claim 15, wherein:

a starting position of the spiral groove is close to the first connecting hole of the base,

a terminal position of the spiral groove is distant from the first connecting hole, and

a line connecting the starting position and the terminal position of the spiral groove passes through the first connecting hole.

18. The rotation limiting device of claim 15, wherein:

a starting position of the stripe groove is close to the second connecting hole of the rotator,

a terminal position of the stripe groove is distant from the second connecting hole, and

a line connecting the starting position and the terminal position of the stripe groove extends along a radial direction of the rotator.

19. The rotation limiting device of claim 15, wherein:

the first connecting hole is a stepped hole and comprises three hole segments with different diameters, a first hole, a second hole, and a third hole, in sequence;

the first hole and the the third hole is disposed on two ends the second hole;

a diameter of the second hole is less than a diameters of the first hole and a diameters of the third hole, such that two shoulders are formed on the two ends of the second hole.

20. The rotation limiting device of claim 19, wherein the third hole and the spiral groove are on a same surface.