Motor device and holder
By setting up a wire channel and conductive shaft unit on the hollow axis of the Yundai Electric Device, the problem of turning or short circuit due to the limitation of the rotation angle is solved. Essence
Patent Information
- Application Number
- CN202323530139.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-22
Smart Images
Figure CN222423364U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of a pan head, in particular to a motor device and a pan head. Background Art
[0002] With the continuous development of gimbals, users' shooting requirements for gimbals are gradually increasing. The gimbal usually includes multiple motor devices that realize different axial rotations, and the rotation and control of the motor devices need to be electrically connected to the corresponding circuit boards through wires. At present, the wires in the gimbal are all passed through the middle through hole of the hollow shaft, so that the motor device cannot rotate infinitely to prevent the motor device from rotating too much and causing the wires to break or short-circuit. At present, for the above situation, mechanical limits are usually added to the motor device of the gimbal to prevent damage to the wires. However, adding mechanical limits will limit the rotation angle of the motor device, thereby affecting the rotation angle of the gimbal during shooting, and further limiting the application scenarios of the gimbal. Utility Model Content
[0003] The technical problem to be solved by the embodiments of the utility model is to provide a motor device and a pan-tilt head to solve the problem in the prior art that the wires of the pan-tilt head are passed through the middle through hole of the hollow shaft, and thus a mechanical limit needs to be added, which results in a limited rotation angle of the hollow shaft.
[0004] The utility model discloses a motor device, comprising a first shell, a second shell and a conductive component, wherein the first shell is connected to the second shell and can rotate relatively, a hollow shaft is arranged in the second shell, a wire passage is formed on the hollow shaft, the conductive component comprises a conductive shaft unit and a sleeve unit which are electrically connected and can rotate relatively in the wire passage, the conductive shaft unit is connected to the first shell, and a first wire introduced into the first shell along the wire passage is arranged on the conductive shaft unit so that the first wire is electrically connected to a circuit board in the first shell, the sleeve unit is connected to the hollow shaft, and a second wire led out of the second shell along the wire passage is arranged on the sleeve unit so that the second wire is electrically connected to a circuit board outside the second shell.
[0005] Optionally, the sleeve unit includes a sleeve body arranged in the hollow shaft, and a first conductor arranged on the inner wall of the sleeve body and electrically connected to the second wire, the sleeve unit is connected to the hollow shaft through the sleeve body, the conductive shaft unit includes a conductive shaft body inserted in the sleeve body, and a second conductor arranged on the outer wall of the conductive shaft body and electrically connected to the first wire, a rotation gap is formed between the conductive shaft body and the sleeve body, the conductive shaft unit is connected to the first shell through the conductive shaft body, and the second conductor is electrically connected to the first conductor.
[0006] Optionally, the end of the conductive shaft body close to the first shell extends out of the hollow shaft along the wire passage, and a fixed rib is provided on the extended end of the conductive shaft body, and the conductive shaft body is connected to the first shell via the fixed rib.
[0007] Optionally, one of the first conductor and the second conductor is in an annular structure, the other of the first conductor and the second conductor is in an annular or convex structure, a plurality of the second conductors are arranged on the conductive shaft body along its length direction, and the first conductor corresponding to the plurality of the second conductors is arranged on the inner side wall of the sleeve body.
[0008] Optionally, the end of the sleeve body close to the first shell extends the hollow shaft along the wire passage, and a positioning rib is provided on the extended end of the sleeve body so that the end of the hollow shaft close to the first shell supports the positioning rib.
[0009] Optionally, a stator bracket corresponding to the hollow shaft is provided on the first shell, and the end of the hollow shaft close to the first shell is placed into the first shell along the stator bracket, and a bearing assembly is provided on the outer wall of the hollow shaft, and the inner wall of the stator bracket and the outer wall of the hollow shaft are connected through the bearing assembly, and a locking piece is connected to the end of the hollow shaft placed in the first shell, so that the locking piece presses down the bearing assembly to lock the position of the first shell.
[0010] Optionally, the locking member and the hollow shaft are conductively connected, a conductive elastic member is arranged in the first shell, one end of the elastic member is in rotational contact with the locking member, and the other end of the elastic member is connected to a third wire so that the third wire is electrically connected to a circuit board in the first shell, and a fourth wire is connected to the end of the hollow shaft close to the second shell so that the fourth wire is electrically connected to a circuit board outside the motor device.
[0011] Optionally, a receiving groove is provided on the locking member, a first magnetic ring is provided in the receiving groove, and a magnetic angle sensor corresponding to the first magnetic ring is provided in the first shell.
[0012] Optionally, a stator connected to the stator bracket is disposed in the second shell, and an annular second magnetic ring is disposed on the outer side of the stator. The second magnetic ring is connected to the inner wall of the second shell, so that after the stator is energized, the stator drives the stator bracket to rotate.
[0013] The utility model also provides a gimbal, which adopts the above-mentioned motor device and includes a handheld part, a pan arm, a roll arm, a pitch arm and a clamping assembly;
[0014] The handheld part and the panning arm are connected via the motor device so that the handheld part and the panning arm can rotate relative to each other;
[0015] The roll arm and the pitch arm are connected via the motor device so that the roll arm and the pitch arm rotate relative to each other;
[0016] One end of the panning arm away from the handheld portion is rotatably connected to one end of the roll arm away from the pitch arm;
[0017] The pitch arm and the clamping assembly are connected via the motor device so that the pitch arm and the clamping assembly can rotate relative to each other.
[0018] Compared with the prior art, the motor device and the pan / tilt provided by the embodiment of the utility model have the following beneficial effects:
[0019] The first shell is connected to the second shell and can rotate relatively, and the hollow shaft is connected to the second shell to ensure that when the first shell rotates relative to the second shell, the hollow shaft and the second shell remain fixed. A wire passing channel is provided on the hollow shaft to form a hollow shaft, and a conductive shaft unit and a sleeve unit which are electrically connected and can rotate relatively are provided in the wire passing channel, so that the conductive shaft unit is connected to the first shell, that is, the rotation of the first shell can drive the conductive shaft unit to rotate, and the sleeve unit is connected to the conductive shaft. At this time, the sleeve unit remains fixed with the conductive shaft, that is, the first shell drives the conductive shaft unit to rotate relative to the sleeve unit, thereby dividing the wire connecting the motor device and the circuit board into two parts that rotate relatively, that is, the first wire on the conductive shaft unit is introduced into the first shell along the wire passing channel and is electrically connected to the circuit board in the first shell, and the second wire on the sleeve unit is led out of the second shell along the wire passing channel and is electrically connected to the circuit board outside the motor device, so that when the first shell rotates, the second wire connected to the external circuit board will not rotate, and there is no need to add a mechanical limit, so that the rotation of the motor device can avoid the situation where the wire is twisted or short-circuited, so that the motor device of the utility model can be rotated unlimitedly and the application scenario when applied to the gimbal is expanded. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:
[0021] Figure 1 An exploded schematic diagram of the structure of the motor device provided in an embodiment of the utility model;
[0022] Figure 2A schematic diagram of the assembly structure of the motor device provided in an embodiment of the utility model;
[0023] Figure 3 This is a schematic diagram of the overall structure of the pan / tilt provided in an embodiment of the utility model.
[0024] The reference numerals in the figures are:
[0025] 1. first shell; 11. stator bracket; 12. bearing assembly; 13. elastic member; 2. second shell; 3. hollow shaft; 31. locking member; 311. first magnetic ring; 4. conductive shaft unit; 41. first conductor; 42. conductive shaft body; 421. fixed rib; 43. second conductor; 5. sleeve unit; 51. second conductor; 52. sleeve body; 521. positioning rib; 53. first conductor; 6. stator; 7. second magnetic ring; 8. gimbal; 81. handheld part; 82. heading arm; 83. roll arm; 84. pitch arm; 85. clamping assembly; 9. motor device. DETAILED DESCRIPTION
[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.
[0027] The utility model embodiment provides a motor device, such as Figure 1 and Figure 2As shown, it includes a first shell 1, a second shell 2 and a conductive component. The first shell 1 is connected to the second shell 2 and can rotate relative to each other. A hollow shaft 3 is arranged in the second shell 2, and a wire passing channel is formed on the hollow shaft 3. The conductive component includes a conductive shaft unit 4 and a sleeve unit 5 which are electrically connected and can rotate relative to each other in the wire passing channel. The conductive shaft unit 4 is connected to the first shell 1, and a first wire 41 introduced into the first shell 1 along the wire passing channel is arranged on the conductive shaft unit 4, so that the first wire 41 is electrically connected to the circuit board in the first shell 1. The sleeve unit 5 is connected to the hollow shaft 3, and a second wire 51 is led out of the second shell 2 along the wire passing channel is arranged on the sleeve unit 5, so that the second wire 51 is electrically connected to the circuit board outside the second shell 2. Through the setting of this structure, the conductive shaft unit 4 and the sleeve unit 5 are used to divide the wire connecting the motor device and the circuit board into two parts that rotate relative to each other, so that the first housing 1 drives the conductive shaft unit 4 to rotate relative to the sleeve unit 5. At this time, the second wire 51 connected to the external circuit board on the sleeve unit 5 will not rotate, so that when the first housing 1 and the second housing 2 rotate relative to each other, the first wire 41 is in an independent rotation state relative to the second wire 51, and is electrically connected through the conductive shaft unit 4 and the sleeve unit 5. While ensuring the circuit connection, it is not necessary to add mechanical limits to avoid the situation where the rotation of the motor device 9 causes the wire to be twisted or short-circuited, so that the motor device 9 of the embodiment of the utility model can rotate without limit. Preferably, the motor device 9 of this embodiment can be applied to the fields of pan / tilt head 8, photographic equipment, and robots.
[0028] Further, the sleeve unit 5 includes a sleeve body 52 disposed in the hollow shaft 3, and a first conductor 53 disposed on the inner wall of the sleeve body 52 and electrically connected to the second wire 51. The sleeve unit 5 is connected to the hollow shaft 3 through the sleeve body 52. The conductive shaft unit 4 includes a conductive shaft body 42 inserted in the sleeve body 52, and a second conductor 43 disposed on the outer wall of the conductive shaft body 42 and electrically connected to the first wire 41. A rotation gap is formed between the conductive shaft body 42 and the sleeve body 52. The conductive shaft unit 4 is connected to the first housing 1 through the conductive shaft body 42, and the second conductor 43 is electrically connected to the first conductor 53. Through the setting of this structure, the conductive shaft body 42 is inserted in the sleeve body 52, and the rotation gap between the conductive shaft body 42 and the sleeve body 52 is utilized, so that when the first housing 1 rotates, the conductive shaft body 42 can be driven to rotate relative to the sleeve body 52. The first conductor 53 on the inner wall of the sleeve body 52 and the second conductor 43 on the outer wall of the conductive shaft body 42 are electrically connected so that the conductive shaft body 42 and the sleeve body 52 can maintain a circuit-conducting state while the conductive shaft body 42 and the sleeve body 52 rotate relative to each other, thereby ensuring that the motor device 9 of the embodiment of the utility model will not affect the conduction of the wire to the corresponding circuit while rotating.
[0029] Preferably, if the sleeve body 52 is made of a conductive material, the first conductor 53 can be electrically connected to the second wire 51 through the sleeve body 52, or, if the sleeve body 52 is made of an insulating material, the first conductor 53 is directly electrically connected to the second wire 51. Similarly, if the conductive shaft body 42 is made of a conductive material, the second conductor 43 can be electrically connected to the first wire 41 through the conductive shaft body 42, or, if the conductive shaft body 42 is made of an insulating material, the second conductor 43 is directly electrically connected to the first wire 41.
[0030] Furthermore, the end of the conductive shaft body 42 close to the first housing 1 extends the hollow shaft 3 along the wire passage, and a fixed rib 421 is provided on the extended end of the conductive shaft body 42, and the conductive shaft body 42 is connected to the first housing 1 through the fixed rib 421. Through the setting of this structure, the fixed rib 421 is provided on the end of the conductive shaft body 42 extending from the hollow shaft 3, and while connecting the conductive shaft body 42 and the first housing 1, the hollow shaft 3 is avoided to avoid affecting the rotation of the conductive shaft body 42 driven by the first housing 1. Preferably, the fixed baffle is an insulating component to avoid short circuits and the like.
[0031] Further, one of the first conductor 53 and the second conductor 43 is in an annular structure, and the other of the first conductor 53 and the second conductor 43 is in an annular or convex structure. A plurality of second conductors 43 are arranged on the conductive shaft body 42 along its length direction, and a first conductor 53 corresponding to the plurality of second conductors 43 is arranged on the inner side wall of the sleeve body 52. Through the arrangement of this structure, by using a conductor of the first conductor 53 and the second conductor 43 in an annular structure, the first conductor 53 and the second conductor 43 can always contact with the other conductor while the first conductor 53 and the second conductor 43 rotate relative to each other, so as to conduct the circuit. Based on this method, the other conductor is arranged in an annular or convex structure so that the two conductors can be electrically connected. In addition, by arranging a plurality of first conductors 53 and second conductors 43 corresponding to each other, the stability of the electrical connection between the conductive shaft body 42 and the sleeve body 52 is improved. Preferably, three groups of second conductors 43 are arranged on the conductive shaft body 42 along its length direction, and first conductors 53 corresponding to the three groups of second conductors 43 are arranged on the inner side wall of the sleeve body 52.
[0032] Furthermore, the end of the sleeve body 52 close to the first housing 1 extends the hollow shaft 3 along the wire-passing channel, and a positioning rib 521 is provided on the extended end of the sleeve body 52, so that the end of the hollow shaft 3 close to the first housing 1 supports the positioning rib 521. Through the arrangement of this structure, the positioning rib 521 is provided at the end of the sleeve body 52 extending from the hollow shaft 3, so that after the sleeve body 52 is fixed in the hollow shaft 3, the positioning rib 521 contacts the end of the hollow shaft 3 to provide an additional support area, ensuring that the sleeve body 52 is stably positioned in the axial direction of the wire-passing channel, so as to prevent the sleeve body 52 from falling off from the hollow shaft 3 when the first housing 1 and the second housing 2 rotate relative to each other.
[0033] Furthermore, a stator 6 bracket 11 corresponding to the hollow shaft 3 is provided on the first shell 1, and the end of the hollow shaft 3 close to the first shell 1 is placed inside the first shell 1 along the stator 6 bracket 11. A bearing assembly 12 is provided on the outer wall of the hollow shaft 3. The inner wall of the stator 6 bracket 11 and the outer wall of the hollow shaft 3 are connected through the bearing assembly 12. A locking member 31 is connected to the end of the hollow shaft 3 placed in the first shell 1, so that the locking member 31 presses down the bearing assembly 12 to lock the position of the first shell 1. Through the setting of this structure, the stator 6 bracket 11 of the first shell 1 is placed in the second shell 2, and the end of the hollow shaft 3 close to the first shell 1 is placed inside the first shell 1 along the stator 6 bracket 11, so that the first wire 41 on the conductive shaft unit 4 can be introduced into the first shell 1 along the wire passage of the hollow shaft 3, and the conductive assembly is stored and protected by the hollow shaft 3. At the same time, the hollow shaft 3 and the stator 6 bracket 11 are connected by the bearing assembly 12, so that the first shell 1 and the second shell 2 can rotate relative to each other, and the hollow shaft 3 is connected by a locking piece 31 located in the second shell 2, so that the locking piece 31 can press down the bearing assembly 12 to lock the position of the first shell 1, thereby preventing the first shell 1 from shaking up and down when the first shell 1 and the second shell 2 rotate relative to each other, thereby improving the compactness of the connection structure between the first shell 1 and the second shell 2.
[0034] Preferably, the bearing assembly 12 includes a plurality of bearings arranged along the length direction of the hollow shaft 3 to ensure the stability of the relative rotation between the first housing 1 and the second housing 2. The locking member 31 can be connected to the end of the hollow shaft 3 by a threaded connection to facilitate adjustment of the locking degree of the first housing 1, thereby ensuring the stability of the relative rotation between the first housing 1 and the second housing 2. Wherein, when multiple bearings are arranged, after the locking member 31 is connected to the hollow shaft 3, the locking member 31 is pressed down on the bearing closest to the threaded end of the hollow shaft 3.
[0035] Furthermore, the locking member 31 and the hollow shaft 3 are electrically connected. A conductive elastic member 13 is provided in the first housing 1, one end of the elastic member 13 is in rotational contact with the locking member 31, and the other end of the elastic member 13 is connected to a third wire so that the third wire is electrically connected to the circuit board in the first housing 1. A fourth wire is connected to the end of the hollow shaft 3 close to the second housing 2 so that the fourth wire is electrically connected to the circuit board outside the motor device 9. Through the arrangement of this structure, different from the above scheme, the locking member 31 and the hollow shaft 3 are both made of conductive materials, or a conductive structure is arranged on the locking member 31 and the hollow shaft 3 so that the locking member 31 and the hollow shaft 3 are electrically connected. An elastic member 13 is also provided so that the locking member 31 is electrically connected to the circuit board in the first housing 1 through the elastic member 13 and the third wire, and is electrically connected to the circuit board outside the motor device 9 through the fourth wire, so that while the conductive component is conducting the circuit, the hollow shaft 3 is directly conductive to increase an additional conducting circuit, thereby facilitating the layout of multiple circuits.
[0036] As described above, the elastic member 13 is preferably a torsion spring as an example: when the first housing 1 rotates, the torsion spring body rotates with the first housing 1 around the hollow shaft 3. Since one end of the torsion spring is only pressed against the locking member 31, when the end of the torsion spring pressing against the locking member 31 is subjected to the torsion force or rotational force from the locking member 31, the end of the torsion spring pressing against the locking member 31 will always contact the locking member 31 during the rotation of the first housing 1 under the action of restoring deformation, so as to ensure that the circuit is always turned on and does not affect the relative rotation of the first housing 1 and the second housing 2. Preferably, a contact circular surface is provided on the locking member 31, so that the end of the torsion spring pressing against the locking member 31 contacts the contact circular surface of the locking member 31, so as to ensure that when the first housing 1 rotates, the end of the torsion spring pressing against the locking member 31 always contacts the locking member 31, so as to avoid the situation where the end of the torsion spring pressing against the locking member 31 is disconnected from the locking member 31 and causes a circuit break.
[0037] Furthermore, a receiving groove is provided on the locking member 31, a first magnetic ring 311 is provided in the receiving groove, and a magnetic angle sensor corresponding to the first magnetic ring 311 is provided in the first shell 1. Through the arrangement of this structure, since the locking member 31 is connected to the hollow shaft 3, when the first shell 1 rotates, the locking member 31 and the hollow shaft 3 remain stationary. At this time, by arranging a magnetic angle sensor on the first shell 1, the magnetic angle sensor senses the change of the magnetic field of the first magnetic ring 311 on the locking member 31, so as to measure the rotation angle of the first shell 1, and converts it into an electrical signal output for further processing and control by the system, thereby realizing the monitoring and precise control of the rotation angle of the motor device 9.
[0038] Furthermore, a stator 6 connected to a stator 6 bracket 11 is provided in the second housing 2. An annular second magnetic ring 7 is provided on the outside of the stator 6, and the second magnetic ring 7 is connected to the inner wall of the second housing 2, so that after the stator 6 is energized, the stator 6 drives the stator 6 bracket 11 to rotate. Through the setting of this structure, the second magnetic ring 7 acts as a rotor. When the winding coil of the stator 6 is energized, the stator 6 generates a rotating magnetic field through the change of the current. This rotating magnetic field interacts with the magnetic field of the second magnetic ring 7, thereby rotating the second magnetic ring 7. However, since the second magnetic ring 7 is fixed to the second housing 2 and does not move, the stator 6 will rotate at this time. Since the stator 6 is connected to the first housing 1 through the stator 6 bracket 11, the rotation of the stator 6 will drive the first housing 1 to rotate, thereby realizing the relative rotation of the first housing 1 and the second housing 2.
[0039] The motor device 9 of the utility model enables the first housing 1 and the second housing 2 to rotate relative to each other through the interaction between the stator 6 and the second magnetic ring 7 when the power is supplied, and the hollow shaft 3 and the second housing 2 are fixed to ensure that when the first housing 1 rotates relative to the second housing 2, the hollow shaft 3 and the second housing 2 remain stationary. An electric shaft unit 4 and a shaft sleeve unit 5 are provided, which are inserted and have a rotation gap, so that the electric shaft unit 4 and the shaft sleeve unit 5 are assembled in the hollow shaft 3 and can rotate relative to each other. At the same time, the first conductor 53 on the sleeve body 52 and the second conductor 43 on the conductive shaft body 42 are electrically connected to realize the electrical connection between the conductive shaft unit 4 and the sleeve unit 5, so that the wire connecting the motor device 9 and the circuit board is divided into two parts that rotate relative to each other, that is, the first wire 41 on the conductive shaft body 42 is introduced into the first shell 1 along the wire passing channel and is electrically connected to the circuit board in the first shell 1, and the second wire 51 on the sleeve body 52 is led out of the second shell 2 along the wire passing channel and is electrically connected to the circuit board outside the motor device 9, so that when the first shell 1 rotates, the first wire 41 rotates independently relative to the second wire 51, and there is no need to add a mechanical limit, which can avoid the situation where the rotation of the motor device 9 causes the wire to be twisted or short-circuited, so that the motor device 9 of the utility model can be rotated without limit, and the application scenario when applied to the gimbal 8 is expanded.
[0040] The utility model also provides a pan head, such as Figure 3 As shown, using the above-mentioned motor device 9, the gimbal 8 includes a handheld portion 81, a pan arm 82, a roll arm 83, a pitch arm 84 and a clamping assembly 85;
[0041] The handheld part 81 and the navigation arm 82 are connected through the motor device 9 so that the handheld part 81 and the navigation arm 82 can rotate relative to each other. The handheld part 81 is connected to or integrally formed with the second housing 2, and the navigation arm 82 is connected to or integrally formed with the first housing 1.
[0042] The roll arm 83 and the pitch arm 84 are connected via the motor device 9 so as to make the roll arm 83 and the pitch arm 84 rotate relative to each other. The roll arm 83 is connected to or integrally formed with the second housing 2, and the pitch arm 84 is connected to or integrally formed with the first housing 1.
[0043] One end of the panning arm 82 away from the handheld part 81 is rotatably connected to one end of the roll arm 83 away from the pitch arm 84. The panning arm 82 and the handheld part 81 are connected via a conventional mechanical rotation structure, such as a rotation axis or a hinge.
[0044] The pitch arm 84 and the clamping assembly 85 are connected via the motor device 9 so as to make the pitch arm 84 and the clamping assembly 85 rotate relative to each other. The pitch arm 84 is connected to or integrally formed with the second housing 2, and the clamping assembly 85 is connected to or integrally formed with the first housing 1.
[0045] The gimbal 8 of the utility model is based on the above-mentioned motor device 9, which can realize unlimited rotation between the handheld part 81 and the pan arm 82, unlimited rotation between the roll arm 83 and the pitch arm 84, and unlimited rotation between the pitch arm 84 and the clamping assembly 85.
[0046] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.
Claims
1. A motor device, characterized in that: The motor device includes a first shell, a second shell and a conductive component, the first shell is connected to the second shell and can rotate relative to it, a hollow shaft is arranged in the second shell, a wire passing channel is formed on the hollow shaft, the conductive component includes a conductive shaft unit and a sleeve unit which are electrically connected and can rotate relative to it in the wire passing channel, the conductive shaft unit is connected to the first shell, and a first wire is arranged on the conductive shaft unit and introduced into the first shell along the wire passing channel so that the first wire is electrically connected to the circuit board in the first shell, and the sleeve unit is connected to the hollow shaft, and a second wire is arranged on the sleeve unit and led out of the second shell along the wire passing channel so that the second wire is electrically connected to the circuit board outside the second shell.
2. The motor device according to claim 1, characterized in that: The sleeve unit includes a sleeve body arranged in the hollow shaft, and a first conductor arranged on the inner wall of the sleeve body and electrically connected to the second wire. The sleeve unit is connected to the hollow shaft through the sleeve body. The conductive shaft unit includes a conductive shaft body inserted in the sleeve body, and a second conductor arranged on the outer wall of the conductive shaft body and electrically connected to the first wire. A rotation gap is formed between the conductive shaft body and the sleeve body. The conductive shaft unit is connected to the first shell through the conductive shaft body, and the second conductor is electrically connected to the first conductor.
3. The motor device according to claim 2, characterized in that: The end of the conductive shaft body close to the first shell extends out of the hollow shaft along the wire passage, and a fixed rib is provided on the extended end of the conductive shaft body, and the conductive shaft body is connected to the first shell through the fixed rib.
4. The motor device according to claim 2, characterized in that: One of the first conductor and the second conductor is in an annular structure, the other of the first conductor and the second conductor is in an annular or convex structure, a plurality of the second conductors are arranged on the conductive shaft body along its length direction, and the first conductor corresponding to the plurality of the second conductors is arranged on the inner side wall of the sleeve body.
5. The motor device according to any one of claims 2 to 4, characterized in that: The end of the sleeve body close to the first shell extends the hollow shaft along the wire passage, and a positioning rib is provided on the extended end of the sleeve body so that the end of the hollow shaft close to the first shell supports the positioning rib.
6. The motor device according to claim 1, characterized in that: A stator bracket corresponding to the hollow shaft is arranged on the first shell, and the end of the hollow shaft close to the first shell is placed into the first shell along the stator bracket, and a bearing assembly is arranged on the outer wall of the hollow shaft, and the inner wall of the stator bracket and the outer wall of the hollow shaft are connected through the bearing assembly, and a locking piece is connected to the end of the hollow shaft placed in the first shell, so that the locking piece presses down the bearing assembly to lock the position of the first shell.
7. The motor device according to claim 6, characterized in that: The locking member and the hollow shaft are conductively connected, a conductive elastic member is arranged in the first shell, one end of the elastic member is in rotational contact with the locking member, and the other end of the elastic member is connected to a third wire so that the third wire is electrically connected to the circuit board in the first shell, and a fourth wire is connected to the end of the hollow shaft close to the second shell so that the fourth wire is electrically connected to the circuit board outside the motor device.
8. The motor device according to any one of claims 6-7, characterized in that: The locking member is provided with a receiving groove, a first magnetic ring is provided in the receiving groove, and a magnetic angle sensor corresponding to the first magnetic ring is provided in the first shell.
9. The motor device according to claim 6, characterized in that: A stator connected to the stator bracket is arranged in the second shell, and an annular second magnetic ring is arranged on the outer side of the stator. The second magnetic ring is connected to the inner wall of the second shell, so that after the stator is energized, the stator drives the stator bracket to rotate.
10. A pan / tilt head, characterized in that: The motor device according to any one of claims 1 to 9 comprises a handheld portion, a pan arm, a roll arm, a pitch arm and a clamping assembly; The handheld part and the panning arm are connected via the motor device so that the handheld part and the panning arm can rotate relative to each other; The roll arm and the pitch arm are connected via the motor device so that the roll arm and the pitch arm rotate relative to each other; One end of the panning arm away from the handheld portion is rotatably connected to one end of the roll arm away from the pitch arm; The pitch arm and the clamping assembly are connected via the motor device so that the pitch arm and the clamping assembly can rotate relative to each other.