CN218626233U - Cloud platform subassembly - Google Patents

Abstract

The utility model discloses a cloud platform subassembly, including first arm body and the second arm body, the internal portion of first arm is equipped with first cavity, the internal portion of second arm is equipped with the second cavity, first arm body is equipped with first installation department, install stator and rotor on the first installation department, the rotor links to each other with the second arm body, the second arm body is equipped with first quill shaft, first quill shaft communicates with the second cavity, be equipped with the mounting hole on the first installation department and in being located the stator, the mounting hole is linked together with first cavity, first quill shaft stretches into to first cavity in, be equipped with first sliding ring on the first quill shaft, be equipped with first conductor on the first sliding ring, first conductor electricity is connected with first wire, be equipped with the second sliding ring in the first cavity, be equipped with the second conductor on the second sliding ring, the second conductor is connected with first conductor sliding connection and electricity, the second electricity is connected with the second wire. The utility model discloses make first wire, second wire winding problem can not appear, also can increase the shooting scope of cloud platform simultaneously.

Description

Cloud platform subassembly

Technical Field

The utility model relates to a cloud platform technical field, more specifically relates to a cloud platform subassembly.

Background

Currently, in the continuous rotation process of a pitching arm of a cloud deck relative to a course arm, a wire connected between the pitching arm and the course arm is wound. In order to solve the problem of wire winding, corresponding limiting blocks are usually arranged on the pitching arm and the heading arm respectively, so that the pitching arm is prevented from rotating 360 degrees relative to the heading arm continuously, and the wire is prevented from winding. Although the scheme can solve the problem of wire winding, the rotating range of the pitching arm can be influenced due to the fact that the pitching arm cannot rotate for 360 degrees relative to the course arm, and the shooting range of the holder is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the defect among the above-mentioned prior art, provide a cloud platform subassembly, can realize 360 continuous rotations of another relative arm body of an arm body of cloud platform, and can avoid the wire winding.

In order to solve the technical problem, the utility model discloses a technical scheme is: a holder assembly comprises a first arm body and a second arm body, wherein the first arm body is rotatably connected with the second arm body, a first cavity is arranged in the first arm body, a second cavity is arranged in the second arm body, a first mounting part is arranged at one end of the first arm body, which is connected with the second arm body, a stator and a rotor are mounted on the first mounting part, the rotor is positioned at the outer side of the stator and is connected with the second arm body, a first hollow shaft is arranged at one end of the second arm body, which is connected with the rotor, the first hollow shaft is communicated with the second cavity, a mounting hole communicated with the first cavity is arranged in the stator on the first mounting part and is positioned in the stator, the first hollow shaft is mounted in the mounting hole and extends into the first cavity, a first slip ring is arranged on the first hollow shaft positioned in the first cavity, at least two first conductors are sequentially arranged on the first slip ring from inside to outside, the first conductors are electrically connected with first leads, the first slip ring is mounted in the first slip ring assembly, the first slip ring is electrically connected with the second slip ring conductors, and a plurality of slip ring conductors are electrically connected with the second slip ring conductors in the second slip ring; at least one of the first conductor and the second conductor is of a circular ring structure.

In the technical scheme, a rotor arranged on a first arm body rotates, the rotor drives a second arm body connected with the rotor to rotate, a first hollow shaft is arranged on the second arm body and connected with the second arm body, the second arm body drives the first hollow shaft to rotate, the first hollow shaft extends into a first cavity through a mounting hole, a first slip ring is arranged on the first hollow shaft in the first cavity, at least two first conductors are arranged on the first slip ring, a second slip ring is arranged in the first cavity, a second conductor corresponding to the first conductor is arranged on the second slip ring, and the first conductor is electrically connected with the second conductor in a sliding connection manner; because at least one of the first conductor and the second conductor is in a circular ring structure, when the first hollow shaft drives the first conductor to rotate, the first conductor can be in sliding connection with the second conductor and keeps conducting constantly. Because the first conductor is electrically connected with the second conductor in a sliding connection mode, in the process that the second arm body rotates 360 degrees relative to the first arm body continuously, the first wire which is electrically connected with the first conductor and is positioned in the second cavity and the second wire which is electrically connected with the second conductor and is positioned in the first cavity cannot be wound, and meanwhile, the shooting range of the tripod head can be enlarged.

Preferably, the first conductor is a conductive contact, the second conductor is a conductive ring, and the conductive contact is electrically connected with the conductive ring in a sliding manner. In this technical scheme, the rotor drives the second arm body and rotates, and the second arm body drives first sliding ring and conductive contact rotatory through first quill shaft, because be provided with the second sliding ring in the first cavity, be provided with conductive ring on the second sliding ring, at the rotatory in-process of conductive contact, conductive ring can often slide each other and the electricity is connected with conductive contact.

Preferably, each of the conductive contacts is sequentially disposed on the first slip ring from inside to outside, and each of the conductive rings is sequentially disposed on the second slip ring from inside to outside corresponding to each of the conductive contacts. The arrangement enables each conductive contact to be in sliding connection and conduction with the corresponding conductive ring.

Preferably, the conductive contact is an elastic member. In this technical scheme, when the in-process that electrically conductive contact and electrically conductive ring slided each other, when wearing and tearing appear, because electrically conductive contact is the elastic component, this electrically conductive contact also can keep good contact with electrically conductive ring to it is stable to guarantee that electrically conductive contact and electrically conductive ring are connected.

Preferably, a boss is formed on one side surface of the first slip ring, which is far away from the second slip ring, the boss is installed in the first hollow shaft and connected with the first hollow shaft, and the first lead penetrates through the boss. In this embodiment, the boss is formed on a side surface of the first slip ring away from the second slip ring, the boss is inserted into the first hollow shaft, and the boss and the first hollow shaft can be connected by using the extrusion force between the boss and the inner wall surface of the first hollow shaft.

Preferably, the second arm body is formed with a circular housing at an outer edge of an end connected to the rotor, the housing being mounted on and connected to an outer circumferential surface of the rotor; the first hollow shaft is coaxially disposed within the housing. In this technical scheme, because the rotor is the ring structure, the second arm body is formed with circular shape shell at the one end outer fringe that links to each other with the rotor, and the shell is installed on the outer peripheral face of rotor, can increase the connection area between rotor and the shell, plays the purpose of reinforcing joint strength. In addition, the casing is arranged on the periphery of the rotor, so that the rotor and the stator inside the rotor can be shielded, and the purpose of protecting the rotor and the stator is achieved.

Preferably, a base communicated with the second cavity is arranged at one end, connected with the rotor, of the second arm body, the first hollow shaft is mounted on the base and detachably connected with the base, and the first hollow shaft is communicated with the base. In the technical scheme, as the base is communicated with the second cavity, the lead arranged in the second cavity can pass through the base and then penetrate into the first hollow shaft, and then is connected with the conductive contact on the first slip ring. Because first quill shaft and base are dismantled and be connected, be convenient for install first quill shaft in base and mounting hole.

Preferably, a second hollow shaft is arranged on the first mounting portion, the second hollow shaft is communicated with the mounting hole, the first hollow shaft is positioned in the second hollow shaft and the mounting hole, a first bearing is mounted on the periphery of the first hollow shaft positioned in the mounting hole, and a second bearing is mounted on the periphery of the first hollow shaft positioned in the second hollow shaft. In the technical scheme, the first hollow shaft is installed in the second hollow shaft and the installation hole, then the first hollow shaft is installed in the first bearing and the inner ring of the second bearing, and radial limiting is performed through the first bearing arranged in the installation hole and the second bearing arranged in the second hollow shaft.

Preferably, a magnetic ring nut is mounted on the periphery of a first hollow shaft in the first cavity, a hall magnetic ring is mounted on the periphery of the magnetic ring nut, the stator is mounted on the periphery of a second hollow shaft, and a magnetism isolating seat is mounted between the stator and the rotor. In this technical scheme, the stator is installed on the periphery of second quill shaft, installs the magnetism isolating seat between stator and the rotor, and at rotor rotation in-process, the rotor can rotate by the magnetism isolating seat relatively.

Preferably, the first arm includes a first main body and a first cover, the first main body is detachably connected to the first cover, the first cavity is formed between the first main body and the first cover, the first mounting portion is formed on the first main body, and the second slip ring is mounted on the first cover. The second arm body comprises a second main body and a second cover body, the second main body is detachably connected with the second cover body, a second cavity is formed between the second main body and the second cover body, and the second main body is connected with the rotor. In the technical scheme, the first main body is detachably connected with the first cover body, so that the first main body and the first cover body can be conveniently assembled and disassembled during subsequent maintenance. Because the second main body is detachably connected with the second cover body, the second main body and the second cover body can be conveniently assembled and disassembled during subsequent maintenance.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses in, because first conductor links to each other and sliding connection with the second conductor electricity, 360 pivoted in-process in succession at the relative first arm body of second arm body, be connected with first conductor electricity and lie in the first wire of second cavity, be connected with second conductor electricity and lie in the second wire of first cavity and can not appear winding problem yet, also can increase the shooting scope of cloud platform simultaneously.

Drawings

Fig. 1 is an exploded view of the pan/tilt head assembly of the present invention;

fig. 2 is an exploded view of another perspective of the pan/tilt head assembly of the present invention;

fig. 3 is a schematic cross-sectional structure diagram of the pan/tilt head assembly of the present invention;

fig. 4 is a schematic structural view of a first slip ring and a second slip ring in the pan/tilt head assembly of the present invention;

fig. 5 is a perspective view of the cradle head assembly of the present invention;

fig. 6 is a schematic structural view of the second arm in the holder assembly of the present invention.

In the drawings: 1. a first arm body; 2. a second arm body; 3. a first cavity; 4. a second cavity; 5. a first mounting portion; 6. a stator; 7. a rotor; 8. a hollow structure; 9. a first hollow shaft; 10. mounting holes; 11. a first body; 12. a first cover body; 13. a first slip ring; 14. a first conductor; 15. a first conductive line; 16. a second slip ring; 17. a second conductor; 18. a second conductive line; 19. a housing; 20. a base; 21. a hollow structure; 22. a second hollow shaft; 23. a first bearing; 24. a magnetic ring nut; 25. a Hall magnetic ring; 26. a second bearing; 27. a magnetism isolating seat; 28. a second body; 29. a second cover body; 30. a boss.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the present embodiments, certain elements of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "long", "short", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations of the present patent, and specific meanings of the above terms can be understood according to specific situations by those of ordinary skill in the art.

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example 1

As shown in fig. 1 to 5, a pan-tilt head assembly includes a first arm 1 and a second arm 2, the first arm 1 is rotatably connected to the second arm 2, a first cavity 3 is disposed inside the first arm 1, a second cavity 4 is disposed inside the second arm 2, the first arm 1 has a first mounting portion 5 at one end connected to the second arm 2, a stator 6 and a rotor 7 are mounted on the first mounting portion 5, the rotor 7 is located outside the stator 6 and connected to the second arm 2, the second arm 2 has a first hollow shaft 9 having a hollow structure 8 at one end connected to the rotor 7, the first hollow shaft 9 has a hollow structure 8, the hollow structure 8 is communicated with the second cavity 4, a mounting hole 10 is disposed on the first mounting portion 5 and located inside the stator 6, the mounting hole 10 penetrates through the first mounting portion 5 and is communicated with the first cavity 3, the first hollow shaft 9 is mounted in the mounting hole 10 and extends into the first cavity 3, a first hollow structure 8 is disposed on the first hollow shaft 9 in the first cavity 3, a first hollow shaft 9 is disposed on the first cavity 3, a first hollow shaft 13 is disposed on the first hollow shaft 9, a second conductor 14, a plurality of conductors are electrically connected to a plurality of conductors 14, and a plurality of conductors 17 are electrically connected to a plurality of conductors 14, and electrically connected to the second conductors 14, and electrically connected to a plurality of conductors 17, and connected to corresponding second conductors 14, and a plurality of conductors 17, and electrically connected to a plurality of conductors 17, and connected to corresponding second conductors 13, and connected to a plurality of conductors 17, and disposed in the second slip ring conductors 13, and connected to a plurality of conductors 17, and connected to a plurality of conductors 14; at least one of the first conductor 14 and the second conductor 17 is a circular ring structure.

In this embodiment, the rotor 7 mounted on the first arm 1 rotates, the rotor 7 drives the second arm 2 connected to the rotor 7 to rotate, the first hollow shaft 9 is disposed on the second arm 2 and connected to the second arm, the second arm 2 drives the first hollow shaft 9 to rotate, since the first hollow shaft 9 extends into the first cavity 3 through the mounting hole 10, the first hollow shaft 9 in the first cavity 3 is provided with the first slip ring 13, the first slip ring 13 is provided with the first conductor 14, the first cavity 3 is provided with the second slip ring 16, the second slip ring 16 is provided with the second conductor 17 corresponding to the first conductor 14, and the first conductor 14 is electrically connected and slidably connected to the second conductor 17; because at least one of the first conductor 14 and the second conductor 17 is in a circular ring structure, when the first hollow shaft 9 drives the first conductor 14 to rotate, the first conductor 14 and the second conductor 17 can be connected in a sliding manner and can be kept in mutual conduction all the time. Because the first conductor 14 is electrically connected with the second conductor 17 in a sliding manner, in the process that the second arm body 2 rotates 360 degrees relative to the first arm body 1 continuously, the first lead 15 which is electrically connected with the first conductor 14 and is positioned in the second cavity 4 and the second lead 18 which is electrically connected with the second conductor 17 and is positioned in the first cavity 3 do not have the winding problem, and meanwhile, the shooting range of the tripod head can be increased. It should be noted that the first arm 1 may be a heading arm, and the second arm 2 may be a pitching arm. The number of the first conductors 14 provided on the first slip ring 13 may be set as required, two or three, and the number of the second conductors 17 provided on the second slip ring 16 needs to be the same as the number of the first conductors 14. It should be further noted that, in the present embodiment, the first slip ring 13 and the first conductor 14 disposed on the first slip ring 13 may correspond to a circuit board, the second slip ring 16 and the second conductor 17 disposed on the second slip ring 16 may correspond to another circuit board, and the first conductor 14 of the circuit board and the second conductor 17 of the another circuit board directly slide and are electrically connected, so that the structure is more compact, the space is smaller, and the assembly and manufacture are easier.

As shown in fig. 1 to 4, the first conductor 14 is a conductive contact, and the second conductor 17 is a conductive ring, and the conductive contact is electrically connected and slidably connected with the conductive ring. In this embodiment, the rotor 7 drives the second arm 2 to rotate, the second arm 2 drives the first slip ring 13 and the conductive contact to rotate through the first hollow shaft 9, and since the second slip ring 16 is disposed in the first cavity 3 and the conductive ring is disposed on the second slip ring 16, the conductive ring can slide and be electrically connected with the conductive contact at any time in the process of rotating the conductive contact.

In addition, each conductive contact is arranged on the first slip ring 13 from inside to outside in sequence, and each conductive ring is arranged on the second slip ring 16 from inside to outside in sequence corresponding to each conductive contact. The arrangement enables each conductive contact to be in sliding connection and conduction with the corresponding conductive ring.

Wherein, the conductive contact is an elastic piece. In this embodiment, when the in-process that electrically conductive contact and electrically conductive ring slided each other, when wearing and tearing appear, because electrically conductive contact is the elastic component, this electrically conductive contact also can keep good contact with electrically conductive ring to guarantee that electrically conductive contact and electrically conductive ring are connected stably.

As shown in fig. 1 to 4, a boss 30 is formed on a side of the first slip ring 13 away from the second slip ring 16, the boss 30 is installed in the hollow structure 8 of the first hollow shaft 9 and connected to the first hollow shaft 9, and the first lead 15 penetrates through the boss 30. In the present embodiment, the boss 30 is formed on a side of the first slip ring 13 facing away from the second slip ring 16, the boss 30 is inserted into the hollow structure 8, and the connection between the boss 30 and the first hollow shaft 9 can be achieved by a pressing force between the boss 30 and an inner wall surface of the hollow structure 8. In order to ensure the firmness of the connection between the boss 30 and the first hollow shaft 9, an adhesive may be provided between the boss 30 and the wall surface of the hollow structure 8. It should be noted that the boss 30 is provided with a hollow structure inside, so that the first wire 15 connected to the first conductor 14 can extend into the second cavity 4 smoothly.

As shown in fig. 1 to 3, 5 and 6, the second arm 2 has a circular housing 19 formed on the outer edge of one end connected to the rotor 7, and the housing 19 is mounted on and connected to the outer peripheral surface of the rotor 7; the first hollow shaft 9 is coaxially arranged within the housing 19. In this embodiment, since the rotor 7 is in a circular ring structure, the second arm 2 is formed with a circular housing 19 at the outer edge of the end connected to the rotor 7, and the housing 19 is mounted on the outer circumferential surface of the rotor 7, the connection area between the rotor 7 and the housing 19 can be increased, and the purpose of enhancing the connection strength is achieved. Further, since the housing 19 is provided on the outer periphery of the rotor 7, the rotor 7 and the stator 6 inside the rotor 7 can be shielded, and dust from the outside can be prevented from entering the rotor 7, thereby achieving the purpose of protecting the rotor 7 and the stator 6. Since the first hollow shaft 9 is coaxially disposed in the housing 19, when the housing 19 rotates, the housing 19 can rotationally stabilize the first hollow shaft 9 and the first slip ring 13 mounted on the first hollow shaft 9.

As shown in fig. 6, the second arm 2 is provided at one end connected to the rotor 7 with a base 20 communicating with the second chamber 4, the first hollow shaft 9 is mounted on the base 20 and detachably connected thereto, and the hollow structure 8 communicates with the base 20. In this embodiment, since the base 20 is communicated with the second cavity 4, the wires disposed in the second cavity 4 can pass through the base 20 and then penetrate the hollow structure 8, and then connect with the conductive contacts on the first slip ring 13. Since the first hollow shaft 9 is detachably connected to the base 20, it is convenient to install the first hollow shaft 9 in the base 20 and the installation hole 10, specifically, the base 20 is provided with a through hole communicating with the second cavity 4, the first hollow shaft 9 is inserted into the through hole of the base 20, and the first hollow shaft 9 is installed in the through hole by using the pressing force between the outer circumferential surface of the first hollow shaft 9 and the inner wall surface of the through hole. Further, a female screw may be provided in the through hole, a male screw may be provided on the circumferential surface of the first hollow shaft 9, and the first hollow shaft 9 and the base 20 may be connected by screw connection between the female screw and the male screw.

As shown in fig. 1 and 2, the first mounting portion 5 is provided with a second hollow shaft 22, the second hollow shaft 22 has a hollow structure 21, the hollow structure 21 communicates with the mounting hole 10, the first hollow shaft 9 is located in the hollow structure 21 and the mounting hole 10, a first bearing 23 is mounted on the outer periphery of the first hollow shaft 9 located in the mounting hole 10, and a second bearing 26 is mounted on the outer periphery of the first hollow shaft 9 located in the hollow structure 21 of the second hollow shaft 22. In the present embodiment, the first hollow shaft 9 is installed in the hollow structure 21 and the installation hole 10 in the second hollow shaft 22, and then the first hollow shaft 9 is installed in the inner rings of the first bearing 23 and the second bearing 26, and the radial limitation is performed by the first bearing 23 disposed in the installation hole 10 and the second bearing 26 disposed in the hollow structure 21.

As shown in fig. 1 to 3, a magnetic ring nut 24 is mounted on the outer periphery of the first hollow shaft 9 in the first cavity 3, and a hall magnetic ring 25 is mounted on the outer periphery of the magnetic ring nut 24; the stator 6 is mounted on the outer periphery of the second hollow shaft 22, and a magnet spacer 27 is mounted between the stator 6 and the rotor 7. In the present embodiment, the stator 6 is mounted on the outer periphery of the second hollow shaft 22, a magnetic isolation seat 27 is mounted between the stator 6 and the rotor 7, and the rotor 7 rotates relative to the magnetic isolation seat 27 during the rotation of the rotor 7.

Example 2

As shown in fig. 1 to 3, the difference from embodiment 1 is that the first arm 1 includes a first body 11 and a first cover 12, the first body 11 is detachably connected to the first cover 12, a first cavity 3 is formed between the first body 11 and the first cover 12, a first mounting portion 5 is formed on the first body 11, and a second slip ring 16 is mounted on the first cover 12. In the embodiment, since the first body 11 is detachably connected to the first cover 12, the assembly between the first body 11 and the first cover 12 and the disassembly during the subsequent maintenance are facilitated. More specifically, the detachable connection between the first body 11 and the first cover 12 may be a screw connection or a snap connection. The second arm 2 comprises a second main body 28 and a second cover 29, the second main body 28 is detachably connected with the second cover 29, a second cavity 4 is formed between the second main body 28 and the second cover 29, and the second main body 28 is connected with the rotor 7. Since the second main body 28 is detachably connected to the second cover 29, the second main body 28 and the second cover 29 can be easily assembled and disassembled for subsequent maintenance. More specifically, the detachable connection between the second body 28 and the second cover 29 may be a screw connection or a snap connection.

Example 3

A cloud platform, includes the cloud platform subassembly in embodiment 1 or embodiment 2.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a cloud platform subassembly, includes first arm body (1) and second arm body (2), first arm body (1) with second arm body (2) rotate to be connected, first arm body (1) inside is provided with first cavity (3), second arm body (2) inside is provided with second cavity (4), its characterized in that: the first arm body (1) is provided with a first mounting part (5) at one end connected with the second arm body (2), the first mounting part (5) is provided with a stator (6) and a rotor (7), the rotor (7) is positioned at the outer side of the stator (6) and is connected with the second arm body (2), the second arm body (2) is provided with a first hollow shaft (9) at one end connected with the rotor (7), the first hollow shaft (9) is communicated with the second cavity (4), the first mounting part (5) is positioned in the stator (6) and is internally provided with a mounting hole (10) communicated with the first cavity (3), the first hollow shaft (9) is mounted in the mounting hole (10) and extends into the first cavity (3), the first hollow shaft (9) positioned in the first cavity (3) is provided with a first slip ring (13), the first slip ring (13) is sequentially provided with at least two first conductors (14) from inside to outside, the first slip ring (13) is electrically connected with a first conductor (14) and extends into the second slip ring (13), and a first lead (15) extends from the first slip ring (13) to the second slip ring (15), a second conductor (17) which corresponds to the position of each first conductor (14) and is electrically connected with the first conductor is arranged on the second slip ring (16), the second conductor (17) is connected with the first conductors (14) in a sliding mode, and a second lead (18) located in the first cavity (3) is electrically connected with the second conductor (17); at least one of the first conductor (14) and the second conductor (17) is in a circular ring structure.

2. A head assembly according to claim 1, wherein: the first conductor (14) is a conductive contact, the second conductor (17) is a conductive ring, and the conductive contact is electrically connected with the conductive ring in a sliding manner.

3. A head assembly according to claim 2, wherein: the conductive contacts are sequentially arranged on the first slip ring (13) from inside to outside, and the conductive rings are sequentially arranged on the second slip ring (16) from inside to outside corresponding to the conductive contacts.

4. A head assembly according to claim 2, wherein: the conductive contact is an elastic member.

5. A head assembly according to any one of claims 1 to 4, wherein: a boss (30) is formed on one side face, away from the second slip ring (16), of the first slip ring (13), the boss (30) is installed in the first hollow shaft (9) and connected with the first hollow shaft, and the first lead (15) penetrates through the boss (30).

6. A head assembly according to claim 1, wherein: a circular shell (19) is formed on the outer edge of one end, connected with the rotor (7), of the second arm body (2), and the shell (19) is installed on the outer peripheral surface of the rotor (7) and connected with the rotor; the first hollow shaft (9) is coaxially arranged within the housing (19).

7. A head assembly according to claim 6, wherein: the second arm body (2) is provided with a base (20) communicated with the second cavity (4) at one end connected with the rotor (7), the first hollow shaft (9) is installed on the base (20) and detachably connected with the base, and the first hollow shaft (9) is communicated with the base (20).

8. A head assembly according to claim 1, wherein: the first mounting portion (5) is provided with a second hollow shaft (22), the second hollow shaft (22) is communicated with the mounting hole (10), the first hollow shaft (9) is located in the second hollow shaft (22) and the mounting hole (10), a first bearing (23) is mounted on the periphery of the first hollow shaft (9) located in the mounting hole (10), and a second bearing (26) is mounted on the periphery of the first hollow shaft (9) located in the second hollow shaft (22).

9. A head assembly according to claim 8, wherein: the magnetic ring nut (24) is mounted on the periphery of a first hollow shaft (9) in the first cavity (3), a Hall magnetic ring (25) is mounted on the periphery of the magnetic ring nut (24), the stator (6) is mounted on the outer peripheral surface of a second hollow shaft (22), and a magnetism isolation seat (27) is mounted between the stator (6) and the rotor (7).

10. A head assembly according to claim 1, wherein: the first arm body (1) comprises a first main body (11) and a first cover body (12), the first main body (11) is detachably connected with the first cover body (12), the first cavity (3) is formed between the first main body (11) and the first cover body (12), the first mounting part (5) is formed on the first main body (11), and the second sliding ring (16) is mounted on the first cover body (12); the second arm body (2) comprises a second main body (28) and a second cover body (29), the second main body (28) is detachably connected with the second cover body (29), a second cavity (4) is formed between the second main body (28) and the second cover body (29), and the second main body (28) is connected with the rotor (7).

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