CN212784927U

CN212784927U - Motor and handheld cloud platform

Info

Publication number: CN212784927U
Application number: CN202021734786.7U
Authority: CN
Inventors: 柳云飞; 徐振华; 杨健; 杨乃旭
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-03-23
Anticipated expiration: 2030-08-17
Also published as: WO2022036942A1

Abstract

A motor and a handheld cloud platform are provided, the motor comprises a motor shell, a stator component and a rotor component, the stator component and the rotor component are arranged in the motor shell, and the rotor component comprises a rotating shaft; the motor further comprises a pre-tightening nut and a magnetic ring, the pre-tightening nut is locked at the non-shaft-extension end of the rotating shaft, the magnetic ring is sleeved outside the pre-tightening nut, and at least part of the pre-tightening nut and the magnetic ring are located in the motor shell. The motor reduces the thickness of the motor by arranging the pre-tightening nut and the magnetic ring at least partially in the motor shell, and prevents the pre-tightening nut and the magnetic ring from being higher than the bottom of the motor; meanwhile, the magnetic ring is sleeved on the pre-tightening nut, so that the magnetic ring and the pre-tightening nut are stacked in the radial direction of the motor, and the structure in the motor is more compact.

Description

Motor and handheld cloud platform

Technical Field

The utility model relates to the technical field of motors, in particular to motor and handheld cloud platform.

Background

Generally, a motor includes a stator fixed relative to a rotor capable of rotating, and in operation, the motor generates a changing magnetic field to drive the rotor to rotate, thereby outputting a rotational speed and a torque. In addition, the motor also judges the current motor motion state through the Hall device, and then the controller controls the driving circuit to supply power to the motor according to the signal collected by the Hall device, so that the motor continuously and normally works. The existing pre-tightening nut is usually fixed above a Hall magnet in a Hall device, and the Hall magnet and the pre-tightening nut are stacked in the axial direction and are higher than the bottom of the motor, so that the whole volume of the motor is larger, and the motor is not beneficial to the application of the motor on small-sized electronic equipment (such as a handheld tripod head, a mobile trolley, a mobile robot and a small-sized handheld tripod head).

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor and handheld cloud platform through the institutional advancement in order to solve above-mentioned technical problem.

According to a first aspect of embodiments of the present invention, the present invention provides an electric machine, comprising a machine housing, and a stator assembly and a rotor assembly disposed within the machine housing, the rotor assembly comprising a rotating shaft; the motor further comprises a pre-tightening nut and a magnetic ring, the pre-tightening nut is locked at the non-shaft-extension end of the rotating shaft, the magnetic ring is sleeved outside the pre-tightening nut, and at least part of the pre-tightening nut and the magnetic ring are located in the motor shell.

Optionally, the stator assembly includes an iron core fixedly connected to the motor housing, the iron core is provided with a recess corresponding to the non-shaft-extension end, and the pre-tightening nut and the magnetic ring are located in the recess.

Optionally, the motor housing includes a rear end surface, the non-shaft-extending end extends toward the rear end surface in the motor housing, and the pre-tightening nut and the magnetic ring do not extend beyond the rear end surface.

Optionally, the motor further comprises a rear end cap assembled to the motor housing, the rear end cap not extending beyond the rear end face of the motor housing.

Optionally, the rear end cap is bonded to the motor housing.

Optionally, the edge of the rear end cover is bonded to the motor housing by glue.

Optionally, the motor further includes a hall detection module disposed on the rear end cover, and the hall detection module is disposed opposite to the magnetic ring.

Optionally, the rear end cover is provided with a through hole, the motor further comprises a bearing assembled in the through hole, the rotating shaft is fixed on the bearing, and the bearing is bonded on the hole wall of the through hole.

Optionally, in the axial direction of the rotating shaft, the magnetic ring does not exceed the end face of the pretensioning nut close to the rear end cover.

Optionally, in the axial direction of the rotating shaft, the magnetic ring is flush with the end face of the pre-tightening nut close to the rear end cover.

Optionally, the magnetic ring is bonded to the pre-tightening nut.

According to the utility model discloses in the second aspect of the embodiment, provide a handheld cloud platform, including the handle and set up in cloud platform mechanism on the handle, cloud platform mechanism includes above-mentioned arbitrary any the motor.

The embodiment of the utility model provides a technical scheme can include following beneficial effect:

the utility model designs a motor with a novel structure and a handheld cloud platform with the motor, the motor at least partially arranges a pre-tightening nut and a magnetic ring in a motor shell to reduce the thickness of the motor and prevent the pre-tightening nut and the magnetic ring from being higher than the bottom of the motor; meanwhile, the magnetic ring is sleeved on the pre-tightening nut, so that the magnetic ring and the pre-tightening nut are stacked in the radial direction of the motor, and the structure in the motor is more compact.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a handheld pan/tilt head according to an exemplary embodiment of the present invention;

fig. 2 is a schematic view of a partial structure of an electric machine according to an exemplary embodiment of the present invention;

fig. 3 is an exploded view of an electric machine according to an exemplary embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of an electric machine according to an exemplary embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The motor and the handheld cradle head of the present invention will be described in detail with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a handheld pan/tilt head according to an exemplary embodiment of the present invention. The utility model discloses handheld cloud platform 100 of embodiment includes handle 101 and sets up cloud platform mechanism 102 on handle 101. The handheld tripod head 100 is used for carrying a shooting device 103. The pan/tilt mechanism 102 may be used to mount a camera 103 such as a mobile phone, a tablet, a camera, and a video camera to fix the camera 103, adjust the attitude (e.g., change the height, tilt angle, and/or direction of the camera 103), and stably maintain the camera 103 at a certain attitude. The holder mechanism 102 may include a single-axis holder, a two-axis holder, or a three-axis holder. In some embodiments, the camera 103 is integrated on the pan-tilt mechanism 102 to form an integrated handheld pan-tilt camera.

In some embodiments, the head mechanism 102 is a three-axis head, and the head mechanism 102 includes a first shaft arm 1021 and a first drive device 1022 mounted on the first shaft arm 1021, a second shaft arm 1023 and a second drive device 1024 mounted on the second shaft arm 1023, and a third drive device 1025. The first driving device 1022 is connected to the camera device 103 for driving the camera device 103 to rotate in the pitch axis direction, the second driving device 1024 is connected to the first shaft arm 1021 for driving the camera device 103 to rotate in the roll axis direction, the third driving device 1025 is fixed to the second shaft arm 1023, and a rotating shaft of the third driving device 1025 is connected to the top of the handle 101 for driving the camera device 103 to rotate in the yaw axis direction. In this embodiment, the motor 10 of the present invention is adopted in the first driving device 1022, the second driving device 1024, and the third driving device 1025.

As shown in fig. 2 to 4, the motor 10 of the embodiment of the present invention includes a motor housing 11, and a stator assembly 2 and a rotor assembly 3 provided in the motor housing 11. The motor 10 further includes a connecting portion 112 disposed on the motor housing 11, and the motor 10 is connected to the shaft arm through the connecting portion 112. In some embodiments, the motor 10 is sleeved on the shaft arm through the connecting portion 112 and fixed through screws.

The stator assembly 2 includes a core 21 fixedly connected to the motor housing 11 and a plurality of coil windings 22, the plurality of coil windings 22 are wound around the core 21, and the core 21 can be fixed in the motor housing 11. In some embodiments, the core 21 includes an annular central body 211 and a plurality of sleeves 212 radially extending from an outer circumferential surface of the central body 211. The plurality of coil windings 22 correspond to the plurality of sleeving parts 212, and each coil winding 22 is wound on the corresponding sleeving part 212. A three-phase alternating current is applied to the plurality of coil windings 22 to generate a varying magnetic field for driving the rotor assembly 3 in rotation.

The rotor assembly 3 includes a rotating shaft 31, an end cap 32, a holder 33, and a plurality of permanent magnets (not shown). The end cap 32 corresponds to the top of the motor 10, and the end cap 32 is fitted to the front end of the motor housing 11. The retainer 33 is mounted within the end cap 32, the shape of the retainer 33 matching the shape of the inner wall of the end cap 32 to enable the retainer 33 to better conform to the inner wall of the end cap 32.

The motor 10 further comprises a clamping piece 34 assembled on the end cover 32, and the propeller 20 can be connected with the clamping piece 34 in a clamping mode, so that the propeller 20 can be conveniently and quickly detached. The clip member 34 may be connected to the end cap 32 by screws, or may be fixed to the end cap 32 by welding or bonding. The rotating shaft 31 includes a shaft extension end 311 and a non-shaft extension end 312, the shaft extension end 311 may be fixedly connected to the end cover 32 or fixedly connected to the clamping member 34, and the non-shaft extension end 312 of the rotating shaft 31 is located at the bottom of the motor 10. In the illustrated embodiment, an example is given in which one end of the rotating shaft 31 is fixedly connected to the clip 34.

The holder 33 includes an annular base 331 and a plurality of magnetic shield arms 332 extending from the annular base 331. A groove 333 is formed between every two magnetism isolating arms 332. A plurality of permanent magnets correspond to the plurality of recesses 333, and each permanent magnet is disposed within a corresponding recess 333. The plurality of permanent magnets oppose the plurality of coil windings 22. The polarities of the surfaces, close to the inner wall, of the two adjacent permanent magnets are opposite, and the magnetic isolation arm 332 can isolate the two adjacent permanent magnets from each other, so that the permanent magnets are prevented from being attracted to each other or repelled from each other to cause position movement.

In one example, the permanent magnets are fixedly attached to the holder 33 and not to the inner wall of the end cap 32. In another example, the permanent magnet is fixedly attached to the holder 33 and also fixedly attached to the inner wall of the end cap 32. In another example, the permanent magnet is not fixedly connected to the holder 33, but is fixedly connected only to the inner wall of the end cap 32, and the permanent magnet is still accommodated in the groove 333. In any of the above fixed connection manners, when the plurality of coil windings 22 are fed with a three-phase alternating current to generate a changing magnetic field, the plurality of permanent magnets are driven by the magnetic field to drive the end cap 32 to rotate (the permanent magnets drive the holder 33 to rotate, the holder 33 drives the end cap 32 to rotate, or the permanent magnets directly drive the end cap 32 to rotate), so as to drive the rotating shaft 31 connected with the end cap 32 to rotate.

Any one of the connection between the permanent magnet and the holder 33, the connection between the permanent magnet and the inner wall of the end cover 32, and the connection between the holder 33 and the inner wall of the end cover 32 may be made by anaerobic adhesive or other adhesives, or may be connected by a snap fit or welding method, or may be combined by multiple connection methods, which is not limited herein.

The machine 10 further comprises a bearing assembly housed within the stator assembly 2, in particular within the central bore of the central body 211. The bearing assembly may include a ball bearing 41, and the rotation shaft 31 is inserted through the ball bearing 41. The bearing assembly may further include an oil-retaining bearing (not shown), the ball bearing 41 and the oil-retaining bearing are inserted into the rotating shaft 31, and the oil-retaining bearing and the ball bearing 41 support the rotation of the rotating shaft 31 together. The rotation of the rotating shaft 31 is supported by the ball bearing 41 and the spherical or ellipsoidal oil bearing together, on one hand, the ball bearing 41 can reduce the resistance of the rotation of the rotating shaft 31 of the rotor, so that the performance of the motor 10 is ensured and the service life of the motor 10 can be prolonged; on the other hand, in the rotation process of the rotating shaft 31, the oil-retaining bearing can automatically adjust the concentricity with the ball bearing 41, so that automatic centering is realized, and the working stability of the motor 10 is ensured.

The motor 10 further includes a pre-tightening nut 12 and a magnetic ring 13, a non-axial-extension end 312 of the rotating shaft 31 is provided with a thread matched with the pre-tightening nut 12, the pre-tightening nut 12 is locked to the non-axial-extension end 312 of the rotating shaft 31, the magnetic ring 13 is sleeved outside the pre-tightening nut 12, and the pre-tightening nut 12 and the magnetic ring 13 can rotate along with the rotating shaft 31. This magnetic ring 13 is through cooperating with hall detection module 16, and hall detection module 16 can gather the magnetic signal production hall signal of motor 10, and the controller of handheld cloud platform 10 obtains the adjusting position of taking device 103 according to hall signal to control drive circuit and for the power supply of motor 10, rotate to the target position with adjusting taking device 103. Wherein, the controller of the handheld tripod head 10 can be arranged in the handle 101, and the controller is electrically connected with the motor 10.

The pre-tightening nut 12 and the magnetic ring 13 are at least partially located in the motor housing 11 to reduce the thickness of the motor 10 and prevent the pre-tightening nut 12 and the magnetic ring 15 from being higher than the bottom of the motor 10. In the prior art, the magnetic ring 13 is assembled on the end of the non-shaft-extending end 312 through the pre-tightening nut 12, and the magnetic ring 13 and the pre-tightening nut 12 are stacked on the shaft of the motor 20 so that the pre-tightening nut 12 and the magnetic ring 13 are higher than the bottom of the motor. The utility model discloses a locate pretightening nut 12 with magnetic ring 15 cover to make magnetic ring 15 and pretightening nut 12 radially pile up at motor 10, thereby make the structure in the motor 10 compacter.

Furthermore, the iron core 21 is provided with a recess 213 corresponding to the non-shaft-extending end 312, and the pre-tightening nut 12 and the magnetic ring 13 are located in the recess 213, so that the assembly manner of the pre-tightening nut 12 and the magnetic ring 13 is more compact, thereby reducing the thickness of the motor 10. Specifically, the recess 213 is provided on the central body 211 of the core 21.

The motor housing 11 includes a rear end surface 111, and the rear end surface 111 is an end surface of the motor housing 11 corresponding to the bottom of the motor 10. The non-shaft-extending end 312 of the rotating shaft 31 extends toward the rear end surface 111 inside the motor housing 11, and the pre-tightening nut 12 and the magnetic ring 13 do not extend beyond the rear end surface 111, so that the pre-tightening nut 12 and the magnetic ring 13 are not higher than the bottom of the motor 10. The magnetic ring 13 and the pre-tightening nut 12 are stacked in the radial direction of the motor 10, so that the structure of the motor 10 is further compact, and the thickness of the motor 10 is reduced.

In addition, the motor 10 further includes a rear end cap 14 assembled to the motor housing 11, and the rear end cap 14 does not extend beyond the rear end surface 111 of the motor housing 11. The rear end cap 14 is provided in the motor case 11 to avoid the rear end cap 14 from increasing in size in the axial direction of the motor 10, so as to meet the demand for reducing the thickness of the motor 10. The rear end cap 14 is bonded to the motor housing 11 in order to allow screwless bulging of the bottom and sides of the motor 10. In some embodiments, the edge of the rear end cap 14 is adhesively bonded to the motor housing 11. Of course, the rear cover 14 may be bonded to the core 21.

The rear end cap 14 is provided with a through hole 141, and the motor 10 further includes a bearing 142 fitted in the through hole 141, the rotating shaft 31 is fixed to the bearing 142, and the bearing 142 cooperates with the ball bearing 41 to support the rotation of the rotating shaft 31. Wherein, the bearing 142 is adhered to the hole wall of the through hole 141. Of course, the bearing 142 may be fixed to the rear cover 14 by welding or other means.

In the axial direction of the rotating shaft 31, the magnetic ring 13 does not exceed the end face of the pretensioning nut 12 close to the rear end cover 14. In some embodiments, in the axial direction of the rotating shaft 31, the magnetic ring 13 is flush with the end face of the pretensioning nut 12 close to the rear end cover 14. The magnetic ring 13 is adhered to the pre-tightening nut 12, so that the assembling mode of the magnetic ring 13 and the pre-tightening nut 12 can be simplified.

The motor 10 further includes a hall detection module 16 disposed on the rear end cover 14, the hall detection module 16 is disposed on a side of the rear end cover 14 opposite to the magnetic ring 13, and the hall detection module 16 is disposed opposite to the magnetic ring 13. The magnetic ring 13 is matched with the hall detection module 16, the hall detection module 16 can collect a magnetic signal of the motor 10 to generate a hall signal, the controller of the handheld holder 10 acquires the adjusting position of the shooting device 103 according to the hall signal, and controls the driving circuit to supply power to the motor 10 so as to adjust the shooting device 103 to rotate to a target position.

Of course, the motor 10 of the present invention is not limited to be applied to the handheld tripod head 100, and the motor 10 may also be used in electronic devices such as a mobile car, a mobile robot, or an unmanned aerial vehicle.

The utility model discloses a motor 10 of novel structure and have its handheld cloud platform 100, this motor 10 specifically sets up in iron core 21 through setting up pretension nut 12 and magnetic ring 13 in motor casing 11 to can reduce motor 10 thickness, make compact structure. Meanwhile, the magnetic ring 13 is sleeved on the pre-tightening nut 12, so that the magnetic ring 13 and the pre-tightening nut 12 are stacked in the radial direction of the motor 10, and the structure in the motor 10 is more compact. The rear end cover 14 is fixed in the motor housing 11 by means of bonding, so that no screw bulge exists on the outer side of the motor 10, and the outer surface of the motor 10 looks more round.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The method and the device provided by the embodiment of the present invention are described in detail above, and the principle and the implementation of the present invention are explained herein by applying a specific example, and the description of the above embodiment is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

The disclosure of this patent document contains material which is subject to copyright protection. The copyright is owned by the copyright owner. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the patent and trademark office official records and records.

Claims

1. The motor is characterized by comprising a motor shell, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are arranged in the motor shell; the motor further comprises a pre-tightening nut and a magnetic ring, the pre-tightening nut is locked at the non-shaft-extension end of the rotating shaft, the magnetic ring is sleeved outside the pre-tightening nut, and at least part of the pre-tightening nut and the magnetic ring are located in the motor shell.

2. The electric machine of claim 1, wherein the stator assembly comprises a core fixedly attached to the machine housing, the core having a recess corresponding to the non-shaft-extending end, the preload nut and the magnetic ring being positioned within the recess.

3. The electric machine of claim 1 wherein the motor housing includes a rear end face, the non-shaft end extending within the motor housing toward the rear end face, the preload nut and the magnetic ring not extending beyond the rear end face.

4. The electric machine of claim 3 further comprising a rear end cap mounted to the machine housing, the rear end cap not extending beyond the rear end face of the machine housing.

5. The electric machine of claim 4, wherein the rear end cap is bonded to the machine housing.

6. The electric machine of claim 5, wherein an edge of the rear end cap is adhered to the machine housing by an adhesive.

7. The motor of claim 4, further comprising a Hall detection module disposed on the rear end cap, the Hall detection module being disposed opposite the magnetic ring.

8. The motor of claim 4, wherein the rear end cap is provided with a through hole, the motor further comprises a bearing assembled in the through hole, the rotating shaft is fixed on the bearing, and the bearing is adhered to the hole wall of the through hole.

9. The electric machine of claim 4, wherein the magnetic ring does not extend beyond the end surface of the pre-tightening nut near the rear end cover in the axial direction of the rotating shaft.

10. The electric machine of claim 9, wherein the magnetic ring is flush with an end surface of the pre-tightening nut near the rear end cover in an axial direction of the rotating shaft.

11. The electric machine of claim 1, wherein the magnetic ring is bonded to the pre-tightening nut.

12. A hand-held head, comprising a handle and a head mechanism arranged on the handle, the head mechanism comprising a motor according to any one of claims 1 to 11.