Rotation limiting structure, holder with rotation limiting structure and unmanned aerial vehicle

Abstract

The utility model provides a rotation limiting structure, a holder with the rotation limiting structure and an unmanned aerial vehicle. The output end of the driving assembly is fixedly connected with the rotating support, and the driving assembly is used for driving the rotating support to rotate; the limiting piece is rotatably arranged between the rotating bracket and the driving assembly; the limiting piece is provided with a limiting part, and the limiting part is matched with the rotating support and the driving assembly and used for limiting the rotating angle of the rotating support relative to the driving assembly. According to the rotation limiting structure, the rotation limiting angle larger than 360 degrees can be achieved, and the structure is simple.

Description

Technical Field

[0001] The present application relates to the technical field of image acquisition equipment, and in particular to a rotation limiting structure and a gimbal and an unmanned aerial vehicle having the rotation limiting structure. Background Art

[0002] Drones, also known as unmanned aerial vehicles, utilize a mounted pan / tilt camera for surveillance, reconnaissance, and aerial photography. These cameras typically rotate via a pan / tilt axis to capture images from multiple angles. Because wiring must be routed between the pan / tilt camera and the pan / tilt axis, existing pan / tilt axes typically utilize a single-rotation limiter to prevent the signal line from being broken by the axis's infinite rotation. However, this limiter prevents the pan / tilt axis from rotating a full 360 degrees, resulting in insufficient camera angles.

[0003] In view of this, it is particularly important to provide a rotation limiting structure with a rotation limiting angle greater than 360 degrees. Utility Model Content

[0004] In order to solve the technical problem that the existing rotation limiting structure cannot fully rotate 360 ​​degrees, the present application provides a rotation limiting structure and a gimbal and a drone having the rotation limiting structure.

[0005] According to the first aspect of the present application, a rotation limiting structure is proposed, comprising:

[0006] Rotating bracket;

[0007] A driving assembly, wherein an output end of the driving assembly is fixedly connected to the rotating bracket, and the driving assembly is used to drive the rotating bracket to rotate;

[0008] a limiting member, the limiting member being rotatably disposed between the rotating bracket and the driving assembly;

[0009] The limiting member is provided with a limiting portion, and the limiting portion cooperates with the rotating bracket and the driving assembly respectively to limit the rotation angle of the rotating bracket relative to the driving assembly.

[0010] Preferably, the limiting portion includes a first limiting portion and a second limiting portion, the driving assembly is provided with a limiting protrusion, the first limiting portion is in conflict with the limiting protrusion, and is used to limit the limiting member to rotate relative to the driving assembly at a first angle, and the rotating bracket is provided with a matching portion, the second limiting portion is in conflict with the matching portion, and is used to limit the limiting member to rotate relative to the rotating bracket at a second angle.

[0011] Preferably, the sum of the first angle and the second angle is greater than 360 degrees.

[0012] Preferably, the limiting member is a limiting ring, the rotating bracket is provided with an embedding groove in the circumference, and the limiting ring is embedded in the embedding groove.

[0013] Preferably, the limiting portion is arranged on the inner circumference side of the limiting ring.

[0014] Preferably, the rotating bracket is further provided with a guide groove in a circumferential direction, the matching portion is arranged in the guide groove, and grooves are provided on the side walls of the limiting ring at both ends of the limiting portion and / or on the side walls of the guide groove at both ends of the matching portion.

[0015] Preferably, a reinforcement ring is circumferentially provided at one end of the limiting ring close to the rotating bracket, and the limiting portion separated from the inner side of the limiting ring by the reinforcement ring forms the first limiting portion, and the limiting portion separated from the outer side of the limiting ring by the reinforcement ring forms the second limiting portion.

[0016] Preferably, the driving assembly includes a fixing seat and a motor, the motor is fixed on the fixing seat, the output end of the motor is fixedly connected to the rotating bracket, and the limiting protrusion is provided at one end of the fixing seat close to the limiting member.

[0017] According to a second aspect of the present application, a gimbal is proposed, comprising the rotation limiting structure as described above.

[0018] According to a third aspect of the present application, a drone is proposed, comprising the gimbal as described above.

[0019] The present application provides a rotational limit structure and a gimbal and drone equipped with the same. When a drive assembly drives a rotating bracket to rotate, the rotating bracket drives the limiter to rotate due to friction between the limiter and the rotating bracket. When the limiter rotates relative to the drive assembly by a first angle, the first limiter portion of the limiter contacts the limiter protrusion of the drive assembly, and the limiter stops rotating due to the limiting action of the limiter protrusion. When the limiter rotates relative to the rotating bracket by a second angle, the second limiter portion of the limiter contacts the mating portion of the rotating bracket, and the rotating bracket stops rotating due to the limiting action of the second limiter portion. Thus, the angular range in which the rotating bracket can rotate relative to the drive assembly is the sum of the first and second angles, with a total angular range of 360-720 degrees. The rotational limit structure of the present application is simple and easy to manufacture. It does not affect the routing of signal lines, and rotation of the rotating bracket does not cause excessive twisting and breaking of the signal lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate the embodiments and, together with the description, serve to explain the principles of the present application. Other embodiments and many of the expected advantages of the embodiments will be readily apparent as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with respect to each other. Like reference numerals designate corresponding similar parts.

[0021] Figure 1 is a structural schematic diagram of a rotation limiting structure according to an embodiment of the present application;

[0022] Figure 2 is an exploded view of the rotation limiting structure according to an embodiment of the present application in one direction;

[0023] Figure 3 is an exploded view of a portion of the rotation limiting structure according to an embodiment of the present application in another direction;

[0024] Figure 4 2 is a schematic structural diagram of a limit ring according to an embodiment of the present application.

[0025] The meaning of each number in the figure is: 1. Mounting seat; 2. Driving assembly; 21. Fixed seat; 211. Mounting cavity; 212. Clamping piece; 213. Limiting protrusion; 22. Motor; 3. Rotating bracket; 31. Cavity; 32. Embedded groove; 33. Guide groove; 34. Matching part; 4. Limiting member; 41. Limiting part; 411. First limiting part; 412. Second limiting part; 42. Groove; 43. Reinforcement ring. DETAILED DESCRIPTION

[0026] In the following detailed description, reference is made to the accompanying drawings, which form a part of the detailed description and are shown by illustrative specific embodiments in which the present application can be practiced. In this regard, directional terms, such as "top", "bottom", "left", "right", "up", "down", etc., are used with reference to the orientation of the figures being described. Because the components of the embodiments can be positioned in several different orientations, directional terms are used for illustrative purposes and are in no way limiting. It should be understood that other embodiments can be utilized or logical changes can be made without departing from the scope of the present application. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present application is defined by the appended claims.

[0027] According to the first aspect of the present application, a rotation limiting structure is proposed. Figure 1 FIG. 1 shows a schematic structural diagram of a rotation limiting structure according to an embodiment of the present application. Figure 1As shown, the rotation limiting structure includes a mounting seat 1, a driving component 2 and a rotating bracket 3. The driving component 2 is fixedly mounted on the mounting seat 1, and the output end of the driving component 2 is fixedly connected to the rotating bracket 3, so that the rotating bracket 3 can rotate under the drive of the driving component 2.

[0028] Figure 2 FIG. 1 shows an exploded view of the rotation limiting structure according to an embodiment of the present application in one direction. Figure 2 As shown, the rotation limiting structure further includes a limiting member 4, which is rotatably disposed between the rotating bracket 3 and the driving assembly 2. The limiting member 4 is provided with a limiting portion 41, which cooperates with the rotating bracket 3 and the driving assembly 2 respectively to limit the rotation angle of the rotating bracket 3 relative to the driving assembly 2.

[0029] In this embodiment, the limiting member 4 is a limiting ring 4, and the limiting portion 41 is integrally formed on the inner circumference of the limiting ring 4. In other embodiments, the limiting member may also be of other shapes and structures, and the limiting portion may also be provided on the inner or outer side of the limiting member, which is not limited here.

[0030] Figure 3 FIG. 1 shows a partial exploded view of the rotation limiting structure according to an embodiment of the present application in another direction. Figure 2 and Figure 3 The drive assembly 2 includes a fixed base 21 and a motor 22. The fixed base 21 is mounted and fixed on the mounting base 1, and the motor 22 is mounted and fixed on the fixed base 21. A limiting protrusion 213 is provided on the end of the fixed base 21 near the limiting ring 4. A cavity 31 is defined on the end of the rotating bracket 3 near the limiting ring 4. A circumferential groove 32 is defined within the cavity 31 to mate with the limiting ring 4. The limiting ring 4 is embedded in the groove 32. A guide groove 33 is also defined circumferentially within the cavity 31 below the groove 32. A mating portion 34 is integrally formed on the guide groove 33 along the guiding direction. The limiting portion 41 includes a first limiting portion 411 and a second limiting portion 412. The first limiting portion 411 abuts against the limiting protrusion 213 to limit the rotation of the limiting ring 4 to a first angle relative to the drive assembly 2. The second limiting portion 412 abuts against the mating portion 34 to limit the rotation of the limiting ring 4 to a second angle relative to the rotating bracket 3.

[0031] When the motor 22 drives the rotating bracket 3 to rotate, the rotating bracket 3 drives the limiting ring 4 to rotate due to the friction between the limiting ring 4 and the rotating bracket 3. When the limiting ring 4 rotates by a first angle relative to the driving assembly 2, the first limiting portion 411 of the limiting ring 4 contacts the limiting protrusion 213, and the limiting ring 4 stops rotating due to the limiting action of the limiting protrusion 213. When the limiting ring 4 rotates by a second angle relative to the rotating bracket 3, the second limiting portion 412 of the limiting ring 4 contacts the mating portion 34 of the rotating bracket 3, and the rotating bracket 3 stops rotating due to the limiting action of the second limiting portion 412. Therefore, the angular range within which the rotating bracket 3 can rotate relative to the driving assembly 2 is the sum of the first and second angles. The sum of the first and second angles is greater than 360 degrees and can be within a range of 360-720 degrees.

[0032] In this embodiment, the limiting protrusion 213, the first limiting portion 411, the second limiting portion 412, and the matching portion 34 are all fan-shaped. It should be noted that during the rotation of the rotating bracket 3, the first limiting portion 411 begins to rotate from the time it contacts one end of the limiting protrusion 213 until the first limiting portion 411 contacts the other end of the limiting protrusion 213. The angle rotated at this time is the first angle; the second limiting portion 412 begins to rotate from the time it contacts one end of the matching portion 34 until the second limiting portion 412 contacts the other end of the matching portion 34. The angle rotated at this time is the second angle. The specific angle values ​​of the first and second angles depend on the set lengths of the limiting protrusion 213 and the matching portion 34. That is, the first angle is the difference between 360 degrees and the center angle of the limiting protrusion 213, and the second angle is the difference between 360 degrees and the center angle of the matching portion 34.

[0033] In this embodiment, the first angle and the second angle are both set to 270 degrees, and the sum of the second angle and the second angle is 540 degrees. In other embodiments, the values ​​of the first angle and the second angle can be set according to actual needs, but the sum of the first angle and the second angle is always greater than 360 degrees and less than 720 degrees.

[0034] It should be noted that in the rotational limit structure of this embodiment, the limit ring 4 is rotatably disposed between the drive assembly 2 and the rotating bracket 3. The limit ring 4 is embedded in the rotating bracket 3, and the fixing seat 21 exerts a vertical squeezing force on the limit ring 4. In a relatively ideal state of this embodiment, the friction between the limit ring 4 and the surface of the embedding groove 32 is sufficient to enable the rotating bracket 3 to fully drive the limit ring 4 to rotate first by a first angle, and then the limit ring 4 rotates relative to the rotating bracket 3 by a second angle.

[0035] However, those skilled in the art can also understand that, in the specific implementation process, the friction between the limit ring 4 and the surface of the embedding groove 32 may not be that great, resulting in the inability of the rotating bracket 3 and the limit ring to maintain synchronous rotation, and the rotation speed of the rotating bracket 3 may be higher than the rotation speed of the limit ring 4, so that while the rotating bracket 3 drives the limit ring 4 to rotate, the limit ring 4 and the rotating bracket 3 will also rotate relative to each other by a certain angle in advance; or, the limit ring 4 and the surface of the embedding groove 32 are relatively smooth, and the rotating bracket 3 cannot drive the limit ring 4 to rotate, so the rotating bracket 3 first rotates relative to the limit ring 4 by a second angle, and after the second limit portion 412 contacts the mating portion 34, the limit ring 4 rotates relative to the driving component 2 by the first angle.

[0036] Figure 4 A schematic diagram of the structure of the limiting ring according to an embodiment of the present application is shown. Figure 3 and Figure 4 In this embodiment, in order to ensure that the first limiting portion 411 and the limiting protrusion 213, and the second limiting portion 412 and the matching portion 34 are completely in contact, the angle between the first limiting portion 411 and the side wall of the limiting ring 4, and the angle between the matching portion 34 and the side wall of the guide groove 33 are both 90 degrees. However, since the limiting portion 41 is integrally formed on the inner side of the limiting ring 4, and the matching portion 34 is integrally formed in the guide groove 33, during actual processing, the milling cutter is in the shape of an arc, and it is inconvenient to process and grind the internal structures of the limiting ring 4 and the guide groove 33. Therefore, grooves 42 are provided on the side walls of the limiting ring 4 at both ends of the limiting portion 41, and on the side walls of the guide groove 33 at both ends of the matching portion 34. The grooves are in the shape of an arc, which facilitates processing by the milling cutter.

[0037] Continue to refer to Figure 4 A reinforcement ring 43 is integrally formed around the end of the stop ring 4 near the rotating bracket 3. The reinforcement ring 43 abuts the bottom of the embedded groove 32. The portion of the stop ring 41 separated from the inner side of the stop ring 4 (i.e., above the reinforcement ring 43 in the figure) by the reinforcement ring 43 forms a first stop 411. The portion of the stop ring 41 separated from the outer side of the stop ring 4 (i.e., below the reinforcement ring 43 in the figure) by the reinforcement ring 43 forms a second stop 412. Because grooves 42 are formed on the sidewalls of the stop ring 4 at both ends of the stop 41, the sidewalls are thinner. The reinforcement ring 43 increases the mechanical strength of the sidewalls at these locations. The reinforcement ring 43 abuts the embedded groove 32, guiding the stop ring 4 and facilitating its rotation relative to the rotating bracket 3. The limiting protrusion 213 abuts the reinforcement ring 43, also serving as a guide and facilitating the rotation of the stop ring 4 relative to the drive assembly 2.

[0038] Continue to refer to Figure 2The fixing base 21 has a mounting cavity 211 formed at one end thereof near the limiting ring 4. The inner sidewall of the mounting cavity 211 is integrally formed with a plurality of clamping pieces 212 spaced circumferentially therebetween. A limiting protrusion 213 is connected between at least two adjacent clamping pieces 212, and both ends of the limiting protrusion 213 are respectively connected to the two clamping pieces 212. One end of the limiting protrusion 213 extends out of the mounting cavity 211. By providing a plurality of clamping pieces 212 on the inner sidewall of the mounting cavity 211, the motor 22 can be better clamped and fixed. At the same time, connecting the limiting protrusion 213 between the clamping pieces 212 can enhance the mechanical strength of the limiting protrusion 213 and reduce stress.

[0039] In summary, this application proposes a rotation limiting structure, the working principle of which is as follows:

[0040] When the motor 22 drives the rotating bracket 3 to rotate, the friction between the retaining ring 4 and the rotating bracket 3 causes the retaining ring 4 to rotate. After the retaining ring 4 rotates by a first angle relative to the drive assembly 2, the first retaining portion 411 of the retaining ring 4 contacts the retaining protrusion 213 of the fixed seat 21. The retaining portion 213 prevents the retaining ring 4 from rotating, allowing the rotating bracket 3 to continue rotating. After the retaining ring 4 rotates by a second angle relative to the rotating bracket 3, the second retaining portion 412 of the retaining ring 4 contacts the mating portion 34 of the rotating bracket 3. The retaining portion 412 prevents the rotating bracket 3 from rotating. Thus, the angular range of rotation of the rotating bracket 3 relative to the drive assembly 2 is the sum of the first and second angles, with a total angular range of 360-720 degrees. The rotation retaining structure of the present application is simple and easy to manufacture. It also does not interfere with the routing of signal cables, and rotation of the rotating bracket 3 does not cause excessive twisting and disconnection of the signal cables.

[0041] According to a second aspect of the present application, a gimbal is further proposed, comprising the rotation limiting structure of the first aspect described above.

[0042] In this embodiment, the rotating bracket is used to connect the camera module of the pan / tilt head.

[0043] According to a third aspect of the present application, a drone is also proposed, comprising the gimbal according to the second aspect.

[0044] In this embodiment, the rotating bracket is a pan axis bracket of the drone, and the rotating bracket is used to connect the camera module of the drone's gimbal camera.

[0045] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present application without departing from the spirit and scope of the present application. In this way, if these modifications and changes are within the scope of the claims of the present application and their equivalents, the present application is also intended to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that the combination of these measures cannot be used to advantage. Any reference signs in the claims should not be considered as limiting the scope.

Claims

1. A rotation limiting structure, characterized in that: include: Rotating bracket; A driving assembly, wherein an output end of the driving assembly is fixedly connected to the rotating bracket, and the driving assembly is used to drive the rotating bracket to rotate; a limiting member, the limiting member being rotatably disposed between the rotating bracket and the driving assembly; The limiting member is provided with a limiting portion, and the limiting portion cooperates with the rotating bracket and the driving assembly respectively to limit the rotation angle of the rotating bracket relative to the driving assembly.

2. The rotation limiting structure according to claim 1, characterized in that: The limiting portion includes a first limiting portion and a second limiting portion. The driving assembly is provided with a limiting protrusion. The first limiting portion is in conflict with the limiting protrusion to limit the limiting member from rotating at a first angle relative to the driving assembly. The rotating bracket is provided with a matching portion. The second limiting portion is in conflict with the matching portion to limit the limiting member from rotating at a second angle relative to the rotating bracket.

3. The rotation limiting structure according to claim 2, characterized in that: The sum of the first angle and the second angle is greater than 360 degrees.

4. The rotation limiting structure according to claim 2, characterized in that: The limiting member is a limiting ring, and an embedding groove is provided in the circumference of the rotating bracket, and the limiting ring is embedded in the embedding groove.

5. The rotation limiting structure according to claim 4, characterized in that: The limiting portion is arranged on the inner circumference side of the limiting ring.

6. The rotation limiting structure according to claim 5, characterized in that: The rotating bracket is further provided with a guide groove in a circumferential direction, the matching portion is arranged in the guide groove, and grooves are provided on the side walls of the limiting ring at both ends of the limiting portion and / or on the side walls of the guide groove at both ends of the matching portion.

7. The rotation limiting structure according to claim 6, characterized in that: A reinforcement ring is circumferentially provided at one end of the limiting ring close to the rotating bracket, and the limiting portion separated from the inner side of the limiting ring by the reinforcement ring forms the first limiting portion, and the limiting portion separated from the outer side of the limiting ring by the reinforcement ring forms the second limiting portion.

8. The rotation limiting structure according to claim 2, characterized in that: The driving assembly includes a fixing seat and a motor. The motor is fixed on the fixing seat. The output end of the motor is fixedly connected to the rotating bracket. The limiting protrusion is provided on one end of the fixing seat close to the limiting member.

9. A pan / tilt head, characterized in that: It comprises the rotation limiting structure as described in any one of claims 1-8.

10. A drone, characterized in that: Including the pan-tilt head as described in claim 9.

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