Braking device for a ring gear assembly

Abstract

The application provides a brake device for a ring motor assembly, the ring motor assembly comprising a ring motor top box and a ring motor inner shell, a bearing having a first rotation axis extending in a longitudinal direction, the ring motor inner shell being horizontally rotated relative to the ring motor top box around the first rotation axis to a specified azimuth angle under the driving of a driving motor; the brake device comprising: a brake disc assembly fixedly connected to a top end of the bearing; a pair of clamps having a center cross connection and supported on the ring motor inner shell through a first center shaft, a first end of each clamp having an arc-shaped arm matched with a periphery of the brake disc assembly; a connecting rod assembly connected to a second end of each clamp to drive the second ends of the pair of clamps to move towards or away from each other under the driving of a brake motor, so as to drive the pair of arc-shaped arms to move away from or towards each other; the brake motor drives the connecting rod assembly along a radial direction of the bearing, so that the pair of arc-shaped arms can directly abut against the periphery of the brake disc assembly, and the abutment generates a force to make the ring motor inner shell keep at the specified azimuth angle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of braking of electronic devices, and particularly relates to a braking device for a ring-moving assembly. BACKGROUND

[0002] In an electronic device with a rotating component, gear transmission backlash can cause a small angle deviation of the rotating component around a stop position, but when the electronic device is applied to a precision application scenario, such as long-distance imaging, the small angle deviation can cause a significant deviation of the imaging angle or position. SUMMARY

[0003] To solve the above technical problems, the present application provides a braking device for a ring-moving assembly, which increases a clamp braking device in the ring-moving assembly, and can keep the ring-moving assembly at a specified position when the ring-moving assembly stops rotating, and can avoid accidental falling of the electronic device.

[0004] In one embodiment, a braking device for a ring-moving assembly is provided, the ring-moving assembly comprising a ring-moving top box, and a ring-moving inner shell rotatably arranged in the ring-moving top box through a bearing, wherein the bearing has a first rotation axis extending in a longitudinal direction and is fixedly connected with the ring-moving top box, and the ring-moving inner shell is horizontally rotated to a specified azimuth angle relative to the ring-moving top box around the first rotation axis under the driving of a driving motor.

[0005] The braking device comprises:

[0006] A brake disc assembly fixedly connected to a top end of the bearing;

[0007] A pair of clamps, which are centrally intersected and supported on the ring-moving inner shell through a first central shaft to rotate together with the ring-moving inner shell relative to the ring-moving top box, and each clamp has an arc-shaped arm at a first end thereof matched with a periphery of the brake disc assembly;

[0008] A connecting rod assembly connected with a second end of each clamp to drive the second ends of the pair of clamps to move towards or away from each other under the driving of a braking motor, so as to drive the pair of arc-shaped arms to move away from or abut against the brake disc assembly;

[0009] Wherein, the braking device is configured to drive the connecting rod assembly in a radial direction of the bearing by the braking motor, so that the pair of arc-shaped arms can directly abut against the periphery of the brake disc assembly, and an abutting force generated in a circumferential direction of the brake disc assembly makes the ring-moving inner shell keep at the specified azimuth angle, and an abutting force generated in the longitudinal direction makes the ring-moving inner shell not to be separated from the ring-moving top box.

[0010] In one embodiment, the linkage assembly comprises a first linkage and a second linkage, one end of the first linkage and the second linkage are hinged to the second central shaft, and the other end of the first linkage and the second linkage are respectively hinged to the second end of a pair of the hoops;

[0011] The brake motor has a brake output shaft extending along the radial direction of the bearing, and the brake output shaft is connected to the second central shaft to drive the second central shaft to move along the radial direction of the bearing.

[0012] In one embodiment, the brake output shaft is formed as a screw rod, and the second central shaft has a threaded hole threadedly matched with the brake output shaft;

[0013] The second central shaft is configured to move horizontally along the radial direction of the bearing under the driving of the rotation of the brake output shaft without rotating with the brake output shaft.

[0014] In one embodiment, the first central shaft is fixedly connected to the ring-shaped inner shell;

[0015] The second central shaft is movably limited in the ring-shaped inner shell along the radial direction of the bearing;

[0016] The first central shaft and the second central shaft are located in the same radial direction of the bearing.

[0017] In one embodiment, when the first linkage and the second linkage are formed as a straight line, the pair of arc-shaped arms abut against the circumference of the brake disc assembly, and the moving direction of the second central shaft is perpendicular to the straight line to lock the pair of arc-shaped arms at the position of abutting against the circumference of the brake disc assembly when the brake motor does not output driving force.

[0018] In one embodiment, comprising:

[0019] A first limiting fixed metal plate is fixed to the ring-shaped inner shell, and the linkage assembly is limited between the first limiting fixed metal plate and the ring-shaped inner shell;

[0020] The first limiting fixed metal plate has a first limiting long hole, the long diameter direction of the first limiting long hole extends along the radial direction of the bearing, and the top end of the second central shaft is received in the first limiting long hole.

[0021] In one embodiment, the ring-shaped inner shell comprises:

[0022] A limiting groove protrudes from the ring-shaped inner shell along the longitudinal direction to receive the bottom end of the second central shaft, wherein the limiting groove extends along the radial direction of the bearing.

[0023] In one embodiment, the braking motor is located between the first central axis and the second central axis.

[0024] In one embodiment, comprising:

[0025] A second limiting fixed metal plate is fixed to the ring dynamic inner shell, and limits the pair of hoops between the second limiting fixed metal plate and the ring dynamic inner shell.

[0026] The second limiting fixed metal plate is located at least directly above the first central axis.

[0027] In one embodiment, when the braking motor rotates forward, the rotation driving force output by the braking output shaft drives the first connecting rod and the second connecting rod to form a straight line, so that the pair of arc-shaped arms abut against the circumference of the brake disc assembly, and under the abutting force, the ring dynamic inner shell and the ring dynamic top box remain relatively stationary.

[0028] When the braking motor rotates reversely, the reverse rotation driving force output by the braking output shaft drives the first connecting rod and the second connecting rod to increase or decrease the included angle, so that the pair of arc-shaped arms move away from the circumference of the brake disc assembly, so that the ring dynamic inner shell can rotate horizontally relative to the ring dynamic top box to a specified azimuth angle under the driving force of the driving motor.

[0029] In one embodiment, the driving motor is fixedly connected with the ring dynamic inner shell and deviates from the first rotation axis.

[0030] Further comprising a synchronization assembly, the synchronization assembly comprising:

[0031] A synchronization wheel is fixedly connected to the top end of the bearing.

[0032] A synchronization belt is connected between the driving output shaft of the driving motor and the synchronization wheel, so as to drive the ring dynamic inner shell to rotate horizontally relative to the ring dynamic top box around the bearing by the driving motor.

[0033] The synchronization wheel is located below the brake disc assembly in the longitudinal direction, and the synchronization wheel and the brake disc assembly are axially fixed to the top end of the bearing by the fastener penetrating the synchronization wheel and the brake disc assembly at the same time.

[0034] According to the above technical solution, the embodiment is directed to the backlash problem, and a braking device is introduced into the ring motion assembly. When the rotating member, i.e., the ring motion inner shell 12 in the ring motion assembly, moves to a specified position, the braking device is started to keep the position of the ring motion inner shell 12 relative to the ring motion top box 11 at the specified position, and further, fix the position of the ring motion inner shell 12 relative to the ring motion top box 11 in the longitudinal direction, so as to avoid the equipment such as a ball machine or a gun machine carried on the ring motion inner shell 12 from falling off the ring motion top box 11 accidentally. BRIEF DESCRIPTION OF DRAWINGS

[0035] The following drawings only schematically illustrate and explain the present application, and do not limit the scope of the present application.

[0036] Figure 1 is a structural schematic view of the braking device for the ring motion assembly of the present application.

[0037] Figure 2 is an exploded schematic view of the first embodiment of the braking device of the present application.

[0038] Figure 3a and Figure 3b is a schematic view of the braking state of the braking device of the present application.

[0039] Figure 4 is an exploded schematic view of the second embodiment of the braking device of the present application.

[0040] Figure 5 is a partial schematic view of the second embodiment of the braking device of the present application.

[0041] Figure 6 is a partial schematic view of the second embodiment of the braking device of the present application.

[0042] Figure 7 is a structural schematic view of the braking device for the ring motion assembly of the present application. DETAILED DESCRIPTION

[0043] In order to have a clearer understanding of the technical features, objects and effects of the present application, the specific embodiments of the present application will be described with reference to the drawings, and the same reference numerals in the drawings represent the same parts.

[0044] In this document, "schematic" means "serves as an example, instance or illustration", and any drawing, embodiment described as "schematic" in this document should not be interpreted as a more preferred or more advantageous technical solution.

[0045] For the purpose of simplicity and brevity of the drawings, only the parts related to the present application are shown in the drawings, and the actual structure of the product is not represented. In addition, for the purpose of simplicity and brevity of the drawings, in some drawings, only one of the parts having the same structure or function is shown schematically, or only one of the parts is labeled.

[0046] In this document, "upper", "lower", "front", "back", "left", "right", and the like are used to describe relative positions between the relevant parts, and do not limit the absolute positions of the relevant parts.

[0047] In this document, "first", "second", and the like are used only to distinguish between each other, and do not represent the importance and order, and the premise of each other.

[0048] In this document, "equal", "same", and the like are not strictly limited in the mathematical and / or geometric sense, but also include the errors allowed by the person skilled in the art in manufacturing or use. Unless otherwise stated, the numerical ranges in this document include not only the entire range between the two endpoints, but also several sub-ranges contained therein.

[0049] Now, example embodiments will be described more fully with reference to the accompanying drawings.

[0050] To solve the problems in the prior art, the present application provides a braking device for a ring motion assembly, in which a hoop braking device is added, which can keep the ring motion assembly at a specified position when the ring motion assembly stops rotating, and can also avoid accidental falling of the electronic device.

[0051] Figure 1 is a structural schematic view of the first embodiment of the braking device for a ring motion assembly of the present application. Figure 2 is an exploded schematic view of the first embodiment of the braking device of the present application. One embodiment of the present application provides a braking device for a ring motion assembly, in which, as shown in Figure 1 , the ring motion assembly includes a ring motion top box 11, and a ring motion inner shell 12 rotatably arranged in the ring motion top box 11 through a bearing 13, the bearing 13 has a first rotation axis L1 extending in the longitudinal direction, and is fixedly connected with the ring motion top box 11, the ring motion inner shell 12 is driven by a driving motor 14 to rotate horizontally around the first rotation axis L1 relative to the ring motion top box 11 to a specified azimuth angle.

[0052] As shown in Figure 1 and Figure 2 , the braking device includes:

[0053] A brake disc assembly 31 is fixedly connected to the top end of the bearing 13.

[0054] A pair of clamps 32 are connected at the center and supported by a first central shaft 321 in the ring-rotating inner shell 12 to rotate together with the ring-rotating inner shell 12 relative to the ring-rotating top box 11, and each clamp 32 has an arc-shaped arm 322 at the first end adapted to the periphery of the brake disc assembly 31;

[0055] A linkage assembly 33 is connected to the second end of each clamp 32 to drive the second end of the pair of clamps 32 to move towards or away from each other under the drive of a brake motor 34, so as to drive the pair of arc-shaped arms 322 to move away from or abut against the periphery of the brake disc assembly 31;

[0056] In the embodiment, the brake device is configured to drive the linkage assembly 33 along the radial direction of the bearing 13, so that the pair of arc-shaped arms 322 can directly abut against the periphery of the brake disc assembly 31, and the abutment force generated in the circumferential direction of the brake disc assembly 31 can keep the ring-rotating inner shell 12 at a specified azimuth angle, and the abutment force generated in the longitudinal direction can keep the ring-rotating inner shell 12 from being separated from the ring-rotating top box 11.

[0057] In the embodiment, the ring-rotating assembly can be implemented as a ball machine with a ring-rotating bolt, wherein the ring-rotating top box 11 can be implemented as a part for fixing to a carrier, which is generally defined as a fixing part. The ring-rotating inner shell 12 can be implemented as a rotating part mounted on the ring-rotating top box 11, which can horizontally rotate relative to the ring-rotating top box 11. The ring-rotating inner shell 12 can further mount a bolt which can horizontally rotate relative to the ring-rotating top box 11 and can also be tilted relative to the ring-rotating inner shell 12. Further, the ring-rotating inner shell 12 can further mount a ball machine which is fixed relative to the ring-rotating top box 11. The ball machine can be hung on the ring-rotating inner shell 12 by a support, and the support can have a horizontal adjustment mechanism. Before the ball machine is installed, the azimuth of the ring-rotating inner shell 12 relative to the ring-rotating top box 11 can be adjusted first, and then the azimuth of the ball machine relative to the ring-rotating inner shell 12 can be adjusted by the support.

[0058] The ring-rotating inner shell 12 is rotatably mounted in the ring-rotating top box 11 by a bearing 13, wherein the bearing 13 has a fixed part and a rotating part which can axially rotate relative to the fixed part, the ring-rotating inner shell 12 is fixedly connected to the rotating part, and the fixed part of the bearing 13 is fixedly connected to the ring-rotating top box 11, so that the ring-rotating inner shell 12 is rotatably mounted in the ring-rotating top box 11.

[0059] The circumferential inner shell 12 can rotate horizontally relative to the circumferential top box 11 around the first rotation axis L1 to a specified azimuth angle under the drive of the drive motor 14. When the circumferential inner shell 12 rotates to the specified azimuth angle, the drive motor 14 stops rotating to stop the circumferential inner shell 12 at the specified azimuth angle position. However, due to the presence of transmission backlash, the circumferential inner shell 12 will wobble at the specified azimuth angle position within a range of the backlash angle, thereby affecting the imaging effect.

[0060] To address the backlash issue, this embodiment provides a braking device in the circumferential assembly. Responding to an input braking signal or a stop signal from the drive motor 14, the brake motor 34 drives a clamp 32, integrally connected to the circumferential inner shell 12, to clamp the brake disc assembly 31, integrally connected to the circumferential top box 11. This clamping generates forces in two directions. The force generated in the circumferential direction of the clamping on the brake disc assembly 31 keeps the circumferential inner shell 12 at a specified azimuth angle relative to the circumferential top box 11. The force generated in the direction of the first rotation axis L1 keeps the circumferential inner shell 12 within the circumferential top box 11, thereby preventing the camera assembly mounted on the circumferential inner shell 12 from accidentally falling off.

[0061] Among them, such as Figure 6 As shown, the bearing 13 is fixed to the center of the circumferential top box 11 and protrudes from the top surface of the circumferential top box 11. The center of the circumferential inner shell 12 is fixedly connected to the rotating part of the bearing 13 so as to rotatably support the circumferential top box 11.

[0062] The bearing 13 has a bearing end cap 131 at its top, and the circumferential inner shell 12 is axially confined between the bearing end cap 131 and the top surface of the circumferential top box 11.

[0063] The brake disc assembly 31 is fixed to the bearing end cover 131.

[0064] The drive motor 14 is fixedly connected to the annular inner shell 12 and is offset from the first rotation axis L1. The drive motor 14 drives the bearing 13 to rotate via a synchronization assembly. The synchronization assembly includes:

[0065] Synchronous pulley 141 is coaxially fixed to bearing end cover 131;

[0066] Synchronous belt 142 is connected between the drive output shaft of drive motor 14 and synchronous pulley 141, so as to drive the inner shell 12 to rotate horizontally relative to the top box 11 to a specified azimuth angle via drive motor 14.

[0067] In the present embodiment, unlike the conventional synchronous belt driving structure, the synchronous wheel 141 is fixedly connected with the fixed member, i.e. the bearing 13, i.e. the synchronous wheel 141 is fixed and does not rotate, and the driving motor 14 is arranged on a rotatable member, i.e. the ring dynamic inner shell 12, and the driving motor 14 is offset from the first rotation axis L1. The working mode of the driving motor 14 in the present embodiment is that when the driving motor 14 outputs a rotating driving force, the driving motor 14 rotates around the synchronous wheel 141 through the synchronous belt 142, and thus drives the ring dynamic inner shell 12 fixedly connected therewith to rotate around the bearing 13. The synchronous belt 142 is arranged on the synchronous wheel 141 in a form similar to a hula hoop, and cannot drive the synchronous wheel 141 to rotate.

[0068] The synchronous wheel 141 is located between the bearing end cover 131 and the brake disc assembly 31 in the axial direction,

[0069] The synchronous wheel 141 and the brake disc assembly 31 are axially fixed to the bearing end cover 131 through the fastener penetrating the synchronous wheel 141 and the brake disc assembly 31.

[0070] Since the ring dynamic top box is relatively stationary, the brake disc assembly and the synchronous wheel are also relatively stationary. The brake device and the driving motor are fixed to the ring dynamic inner shell through screws; the driving motor and the synchronous wheel are driven through gears (or a synchronous belt). Therefore, when the driving motor is started, the brake device rotates with the ring dynamic inner shell. When the brake motor is started, the brake device acts on the brake disc assembly to play a braking role.

[0071] Specifically, the brake disc assembly 31 includes a brake disc and a brake pad, the brake disc is axially fixed to the bearing end cover 131, and the brake pad covers the brake disc from the top to provide a friction surface extending along the peripheral wall; the brake disc has a limiting portion protruding radially outward.

[0072] The brake disc is used for fixed connection with the bearing end cover 131 and is fixed through axial connection, and the brake pad is used for providing a friction surface extending along the peripheral wall. The brake disc and the brake disc are limited in the circumferential direction by the radially outward protruding limiting portion to avoid relative rotation of the brake disc and the brake disc.

[0073] As shown in Figure 2 A pair of hoops 32 are connected with the center intersecting and supported on the ring dynamic inner shell 12 through a first center shaft 321, and each hoop 32 has an arc-shaped arm 322 at the first end matched with the peripheral edge of the brake disc assembly 31.

[0074] The connecting rod assembly 33 is connected with the second end of each hoop 32 to drive the second ends of the pair of hoops 32 to move towards or away from each other under the driving of the brake motor 34, so as to drive the pair of arc-shaped arms 322 to move away from or abut against the peripheral edge of the brake disc assembly 31.

[0075] The brake motor 33 is configured to drive the link assembly 33 along the radial direction of the bearing 23.

[0076] The pair of clamps 32 are cross-arranged, and the middle part passes through the first central shaft 321 to pass through the stepped shaft on the ring moving inner shell 12, forming a scissor arm structure, the second end of which is connected with the link assembly 33 respectively, and is fixed by a pin, so as to be driven by the link assembly 33 to move towards or away from each other. When the second ends of the pair of clamps 32 are driven by the link assembly to move towards each other, the distance between the second ends of the pair of clamps 32 decreases, and at the same time, the first ends of the pair of clamps 32 move away from each other, the distance increases, and then the first ends of the clamps 32 are separated from the periphery of the brake disc assembly 31, so as to release the clamping of the clamps 32 on the brake disc assembly 32. When the second ends of the pair of clamps 32 are driven by the link assembly 33 to move away from each other, the distance between the second ends of the pair of clamps 32 increases, and at the same time, the first ends of the pair of clamps 32 move towards each other, the distance decreases, and then the first ends of the clamps 32 are clamped to the periphery of the brake disc assembly 31, so as to realize the braking of the ring moving assembly by the clamping of the clamps 32 on the brake disc assembly 31, so as to keep the ring moving inner shell 12 at a specified azimuth angle relative to the ring moving top box 11.

[0077] The link assembly 33 includes a first link 331 and a second link 332, one end of the first link 331 and the second link 332 is hinged to the second central shaft 333, and the other end is hinged to the second end of the pair of clamps 32 respectively.

[0078] The brake motor 34 has a brake output shaft 341 extending along the radial direction of the bearing 13, and the brake output shaft 341 is connected with the second central shaft 333 to drive the second central shaft 333 to move along the radial direction of the bearing 13.

[0079] The brake output shaft 341 directly drives the second central shaft 333 to move, so as to change the included angle between the first link 331 and the second link 332 by changing the distance between the second central shaft 333 and the first central shaft 321, and then change the distance between the second ends of the pair of clamps 32 by changing the included angle of the first link 331 and the second link 332. When the distance between the second ends of the pair of clamps 32 changes, the distance between the first ends of the pair of clamps 32 can be changed, so as to realize the clamping or opening of the clamps.

[0080] Specifically, the interval between the second ends of the pair of clamps 32 is determined by the distance between the distal ends of the first link and the second link, when the included angle between the first link 331 and the second link 332 is 180°, i.e. forming a straight line, the distance between the distal ends of the first link and the second link is the largest, then the interval between the second ends of the pair of clamps 32 is the largest, and the interval between the first ends of the pair of clamps 32 is the smallest, which corresponds to the state that the clamps 32 hold the brake disc assembly 31. When the included angle between the first link 331 and the second link 332 decreases, then the distance between the distal ends of the first link 331 and the second link 332 decreases, then the interval between the second ends of the pair of clamps 32 is the smallest, and the interval between the first ends of the pair of clamps 32 is the largest, which corresponds to the state that the clamps 32 release the brake disc assembly 31.

[0081] By Figure 3a It can be clearly seen that when the first link 331 and the second link 332 form a straight line, the pair of arc-shaped arms 322 hold the brake disc assembly 31, and the direction of the brake output shaft 341 is perpendicular to the straight line formed by the first link 331 and the second link 332, thereby forming a self-locking state. Then when the brake motor 34 is accidentally stopped, the link assembly will be locked in the state that the pair of arc-shaped arms 322 hold the brake disc assembly 31 as shown, and will not be accidentally released. Figure 3a

[0082] Among them, the brake output shaft 341 is formed as a lead screw, and the second center shaft 333 has a threaded hole 333a that threadedly cooperates with the brake output shaft 341, in this way, the second center shaft 333 is configured to move horizontally along the radial direction of the bearing 13 under the rotational drive of the brake output shaft 341, without rotating together with the brake output shaft 341.

[0083] Among them, the first center shaft 321 is fixedly connected to the ring-moving inner shell 12, for supporting the clamps 32;

[0084] The second center shaft 333 is movably limited in the ring-moving inner shell 12 along the radial direction of the bearing 13, wherein the first center shaft 321 and the second center shaft 333 are located in the same radial direction of the bearing 13.

[0085] Specifically, as Figure 5 shown, the ring-moving inner shell 12 has a limiting groove 121 protruding from the ring-moving inner shell 12 in the longitudinal direction, for receiving the bottom end of the second center shaft 333, wherein the limiting groove 121 extends along the radial direction of the bearing 13.

[0086] ​The limiting groove 121 defines the moving direction and range of the second central shaft 333. Under the limiting effect of the limiting groove 121, the second central shaft 333 cannot rotate with the brake output shaft 341, but is limited to keep the direction of longitudinal extension, and thereby changes the matching position of the second central shaft 333 with the brake output shaft 341 in the radial direction of the bearing 13 through the screw thread cooperation of the screw hole 333a and the brake output shaft 341. As shown in Figure 3a and Figure 3b The positions of the two ends of the limiting groove 121 correspond to the states of the clamping hoop 32 being clamped and opened, respectively.

[0087] When the first connecting rod 331 and the second connecting rod 332 are formed in a straight line, the pair of arc-shaped arms 322 abut against the circumferential edge of the brake disc assembly 31, and the moving direction of the second central shaft 333 is perpendicular to the straight line, so as to lock the pair of arc-shaped arms 322 at the position of abutting against the circumferential edge of the brake disc assembly 31 when the brake motor 34 does not output driving force.

[0088] As shown in Figure 3b The brake motor 34 rotates clockwise, pulls the second central shaft 333 to slide in the limiting groove 121 of the ring dynamic inner shell, drives the included angle of the first connecting rod 331 and the second connecting rod 332 to decrease, thereby drives the second ends of the pair of clamping hoops 32 to move towards each other, the first ends of the clamping hoops 32 to move away from each other around the first central shaft 321, the first ends of the clamping hoops 32 to be separated from the circumferential edge of the brake disc assembly, and the ring dynamic inner shell 22 to be separated from the ring dynamic top box 21 to realize relative rotation.

[0089] As shown in Figure 3a The brake motor 34 rotates counterclockwise, pushes the second central shaft 333 to slide in the limiting groove 121 of the ring dynamic inner shell 22, drives the included angle of the first connecting rod 331 and the second connecting rod 332 to increase, thereby drives the second ends of the pair of clamping hoops 32 to move away from each other, the first ends of the clamping hoops 32 to move towards each other around the first central shaft 321, the first ends of the clamping hoops 32 to clamp the circumferential edge of the brake disc assembly 31, and the ring dynamic inner shell 11 to be unable to relatively rotate with the ring dynamic top box 11.

[0090] After the clamping hoops are clamped, the clamping hoops 32 are clamped in one body with the brake disc assembly 31 in an interference manner. Since the clamping hoops are installed and fixed on the ring dynamic inner shell 12, and the brake disc assembly 31 is fixed on the ring dynamic top box 11, the brake structure solves the backlash problem of brake braking. The circular arc acting surface of the first end of the clamping hoop and the circular arc circumferential surface of the brake disc assembly contact and interact with each other, the brake is stable and smooth, and the brake friction force is large.

[0091] As shown in Figure 4 The brake device of the embodiment further comprises:

[0092] The first limiting and fixing sheet metal 51 is fixed to the circumferential inner shell 12 and limits the connecting rod assembly 33 between the first limiting and fixing sheet metal 51 and the circumferential inner shell 12.

[0093] The first limiting and fixing sheet metal 51 has a first limiting elongated hole 511, the long diameter direction of which extends along the radial direction of the bearing 13, and the top end of the second central shaft 333 is received in the first limiting elongated hole 511.

[0094] The function of the first limiting and fixing sheet metal 51 is to: (1) limit the connecting rod assembly 33 in the direction of the first rotation axis L to prevent the connecting rod assembly 33 from moving or failing to hold. (2) together with the limiting groove 121 on the circumferential inner shell 12, limit the direction and range of movement of the second central shaft 333. Therefore, the first limiting elongated hole 511 and the limiting groove 121 have the same shape and correspond in position.

[0095] like Figure 3a As shown, in the structure of the linkage assembly 33, a free space is formed between the first central shaft 321 and the second central shaft 333. Therefore, preferably, the brake motor 34 is located between the first central shaft 321 and the second central shaft 333. The brake motor 34 opens the clamp by moving the second central shaft 333 toward the first central shaft 321, and tightens the clamp by moving the second central shaft 333 away from the first central shaft 321.

[0096] Furthermore, such as Figure 4 As shown, it includes:

[0097] The second limiting and fixing sheet metal 52 is fixed to the annular inner shell 12 and limits a pair of clamps 32 between the second limiting and fixing sheet metal 52 and the annular inner shell 12.

[0098] The second limiting and fixing sheet metal 52 is located at least directly above the first central axis 321.

[0099] The second limiting and fixing sheet metal 52 is used to limit the position of the clamp 32 in the direction of the first rotation axis L to prevent the clamp 32 from moving and failing to hold.

[0100] When the brake motor 34 rotates in the forward direction, the rotational force output by the brake output shaft 341 drives the first link 331 and the second link 332 to form a straight line, so that a pair of arc arms 322 abut against the periphery of the brake disc assembly 31. Under the abutment force, the annular inner shell 12 and the annular top box 11 remain relatively stationary.

[0101] When the brake motor rotates reversely, the reverse rotation driving force outputted by the brake output shaft 341 increases or decreases the included angle of the first connecting rod 331 and the second connecting rod 332, so as to make the pair of arc-shaped arms 322 move away from the periphery of the brake disc assembly 31, and make the ring-moving inner housing 12 horizontally rotate to a specified azimuth angle relative to the ring-moving top box 11 under the driving force of the driving motor 14.

[0102] According to the above technical solution, the embodiment provides a brake device in the ring-moving assembly for solving the backlash problem. The brake device is responsive to an input brake signal or a stop signal of the driving motor 14, and drives the clamp 32 connected with the ring-moving inner housing 12 to tightly hold the brake disc assembly 31 connected with the ring-moving top box 11 by the brake motor 34. Two direction forces are generated by the holding. The force generated by the holding in the circumferential direction of the brake disc assembly 31 makes the ring-moving inner housing 12 keep at a specified azimuth angle relative to the ring-moving top box 11. The force generated by the holding in the direction of the first rotation axis L1 makes the ring-moving inner housing 12 be kept in the ring-moving top box 11, so as to prevent the camera assembly carried on the ring-moving inner housing 12 from falling accidentally.

[0103] The above detailed description is only a specific description of the feasible implementation of the present application, and is not used to limit the protection scope of the present application. Any equivalent implementation or change, such as combination, division or repetition of features, which does not deviate from the spirit of the present application, should be included in the protection scope of the present application.

Claims

1. A braking device for a circumferential assembly, characterized in that, The circumferential assembly includes a circumferential top box (11) and a circumferential inner shell (12) rotatably mounted in the circumferential top box (11) via a bearing (13). The bearing (13) has a first rotation axis (L1) extending in the longitudinal direction and is fixedly connected to the circumferential top box (11). The circumferential inner shell (12) rotates horizontally relative to the circumferential top box (11) around the first rotation axis (L1) to a specified azimuth angle under the drive of the drive motor (14). The braking device includes: Brake disc assembly (31), the brake disc assembly (31) is fixedly connected to the top of the bearing (13); A pair of clamps (32) are centrally connected and supported on the annular inner shell (12) by a first central shaft (321) so as to rotate together with the annular inner shell (12) relative to the annular top box (11). The first end of each clamp (32) has an arcuate arm (322) adapted to the periphery of the brake disc assembly (31). Linkage assembly (33), which is connected to the second end of each clamp (32) to drive the second ends of a pair of clamps (32) to move towards or away from each other under the drive of brake motor (34), so as to drive a pair of arc arms (322) to move away from or towards each other, so that the arc arms (322) move away from or abut against the brake disc assembly (31); The braking device is configured such that the brake motor (34) drives the connecting rod assembly (33) in the radial direction of the bearing (13) so that a pair of arc arms (322) can directly abut against the periphery of the brake disc assembly (31), the force generated by the abutment against the brake disc assembly (31) in the circumferential direction keeps the annular inner shell (12) at the specified azimuth angle, and the force generated by the abutment against the longitudinal direction keeps the annular inner shell (12) from detaching from the annular top box (11).

2. The braking device for a circumferential assembly according to claim 1, characterized in that, The linkage assembly (33) includes a first linkage (331) and a second linkage (332), one end of the first linkage (331) and the second linkage (332) is hinged to the second central shaft (333), and the other end is respectively hinged to the second end of a pair of clamps (32); The brake motor (34) has a brake output shaft (341) extending radially along the bearing (13), the brake output shaft (341) being connected to the second central shaft (333) to drive the second central shaft (333) to move radially along the bearing (13).

3. The braking device for a circumferential assembly according to claim 2, characterized in that, The brake output shaft (341) is formed as a lead screw, and the second central shaft (333) has a threaded hole (333a) that is threaded to the brake output shaft (341); The second central shaft (333) is configured to move horizontally along the radial direction of the bearing (13) under the rotational drive of the brake output shaft (341), without rotating with the brake output shaft (341).

4. The braking device for a circumferential assembly according to claim 2, characterized in that, The first central shaft (321) is fixedly connected to the annular inner shell (12); The second central shaft (333) is movably confined within the annular inner shell (12) along the radial direction of the bearing (13); The first central shaft (321) and the second central shaft (333) are located in the same radial direction of the bearing (13).

5. The braking device for a circumferential assembly according to claim 2, characterized in that, When the first link (331) and the second link (332) are formed into a straight line, the pair of arc arms (322) abut against the periphery of the brake disc assembly (31), and the movement direction of the second central shaft (333) is perpendicular to the straight line, so as to lock the pair of arc arms (322) at the position abutting against the periphery of the brake disc assembly (31) when the brake motor (34) does not output driving force.

6. The braking device for a circumferential assembly according to claim 2, characterized in that, include: The first limiting and fixing sheet metal (51) is fixed to the annular inner shell (12) and limits the connecting rod assembly (33) between the first limiting and fixing sheet metal (51) and the annular inner shell (12). The first limiting and fixing sheet metal (51) has a first limiting elongated hole (511), the long diameter direction of the first limiting elongated hole (511) extends along the radial direction of the bearing (13), and the top end of the second central shaft (333) is received in the first limiting elongated hole (511).

7. The braking device for a circumferential assembly according to claim 2, characterized in that, The annular inner shell (12) includes: A limiting groove (121) protrudes longitudinally from the annular inner shell (12) to receive the bottom end of the second central shaft (333), wherein the limiting groove (121) extends radially along the bearing (13).

8. The braking device for a circumferential assembly according to claim 2, characterized in that, The brake motor (34) is located between the first central shaft (321) and the second central shaft (333).

9. The braking device for a circumferential assembly according to claim 1, characterized in that, include: The second limiting and fixing sheet metal (52) is fixed to the annular inner shell (12) and limits the pair of clamps (32) between the second limiting and fixing sheet metal (52) and the annular inner shell (12). The second limiting and fixing sheet metal (52) is located at least directly above the first central axis (321).

10. The braking device for a circumferential assembly according to claim 2, characterized in that, When the brake motor (34) rotates in the forward direction, the rotational force output by the brake output shaft (341) drives the first connecting rod (331) and the second connecting rod (332) to form a straight line, so that the pair of arc arms (322) abut against the periphery of the brake disc assembly (31). Under the abutment force, the annular inner shell (12) and the annular top box (11) remain relatively stationary. When the brake motor rotates in the reverse direction, the reverse rotational force output by the brake output shaft (341) drives the angle between the first link (331) and the second link (332) to increase or decrease, so that the pair of arc arms (322) move away from the periphery of the brake disc assembly (31), so that the circumferential inner shell (12) can rotate horizontally relative to the circumferential top box (11) to a specified azimuth angle under the driving force of the drive motor (14).

11. The braking device for a circumferential assembly according to claim 1, characterized in that, The drive motor (14) is fixedly connected to the annular inner shell (12) and is offset from the first rotation axis (L1); The system further includes a synchronization component, the synchronization component comprising: Synchronous pulley (141), which is fixedly connected to the top of the bearing (13); A timing belt (142) is connected between the drive output shaft of the drive motor (14) and the timing pulley (141) to drive the annular inner shell (12) to rotate horizontally around the bearing (13) relative to the annular top box (11) via the drive motor (14); The synchronous pulley (141) is located below the brake disc assembly (31) in the longitudinal direction. The synchronous pulley (141) and the brake disc assembly (31) are axially fixed to the top of the bearing (13) by fasteners that pass through both the synchronous pulley (141) and the brake disc assembly (31).

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