Rotating mechanism, radar and sweeper

Abstract

The embodiment of the utility model relates to the technical field of radars, and discloses a rotating mechanism, a radar and a sweeper, the rotating mechanism comprises a base, a shaft branch, a bearing, a driving assembly and a mounting seat, and the shaft branch is fixed on the base; an inner ring of the bearing is fixedly arranged on the shaft branch; the driving assembly is arranged on the base; the mounting seat is fixed with the outer ring of the bearing, the mounting seat is connected with the driving assembly, the driving assembly is used for driving the mounting seat to rotate relative to the base, and the mounting seat can be used for mounting a distance measuring module. Through the above mode, the stability of the rotating speed of the driving assembly can be improved, and the distance measurement precision of the distance measurement module is further improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of radar technology, and in particular to a rotating mechanism, a radar and a sweeper. Background Art

[0002] Radar is being used more and more widely in the fields of automobiles, drones, sweeping robots, etc. Radar is used to identify target or obstacle information, thus providing a basis for automobiles, drones or sweeping robots to avoid obstacles.

[0003] In order to expand the detection range of the radar, many radars are set up to rotate. Figure 1 The figure shows an existing rotating mechanism 100' for realizing radar rotation, and the rotating mechanism 100' includes: a mounting seat 1', a fixed module 2' and a rotating module 3'. Among them, the fixed module 2' includes: two bearings 21' and a motor stator 22' arranged on the mounting seat 1'; the rotating module 3' includes: a rotating shaft 31' arranged on the two bearings 21', a mounting frame 32' arranged on the rotating shaft 31' and a motor rotor 33' arranged on the mounting frame 32'. The rotating module 3' realizes 360° rotation relative to the fixed module 2' through the mutual cooperation of the rotating shaft 31' and the bearing 21'. The motor stator 22' and the motor rotor 33' form a brushless motor. The motor rotor 33' will drive the mounting frame 32' to rotate during the rotation process, thereby driving the rotation of the ranging module installed on the mounting frame 32'.

[0004] During the implementation of the embodiment of the utility model, the inventor discovered that: with the above-mentioned method, since the rotating shaft 31' rotates relative to the fixed module 2', the rotating shaft 31' needs to be set on two bearings 21', and the two bearings 21' are prone to non-concentricity during installation, which causes the mounting frame 32' to rotate unevenly, and further causes the rotation speed of the rotating module 3' to be unstable, affecting the measurement accuracy of the ranging module. Utility Model Content

[0005] The main technical problem solved by the embodiments of the utility model is to provide a rotating mechanism, a radar and a sweeper, which can improve the smoothness of the rotation of the mounting seat, enhance the stability of the rotation speed of the driving component, and thus help to improve the measurement accuracy of the ranging module.

[0006] In order to solve the above technical problems, a technical solution adopted in an embodiment of the utility model is: to provide a rotating mechanism, including a base, an axis branch, a bearing, a driving assembly and a mounting seat, the axis branch is fixed to the base; the inner ring of the bearing is fixedly arranged on the axis branch; the driving assembly is arranged on the base; the mounting seat is fixed to the outer ring of the bearing, the mounting seat is connected to the driving assembly, the driving assembly is used to drive the mounting seat to rotate relative to the axis branch, the mounting seat can be used to install a ranging module, and the mounting seat can be used to install a ranging module.

[0007] In this embodiment, the ranging module can be installed on the mounting seat. Compared with the method of setting the rotating shaft on two bearings in the prior art, this embodiment fixes the shaft branch to the base, fixes the inner ring of the bearing to the shaft branch, and the outer ring of the bearing is fixed to the mounting seat. The rotating shaft does not need to rotate relative to the base, which is beneficial to improve the smoothness of the mounting seat during rotation and improve the stability of the driving component rotation speed, thereby improving the measurement accuracy of the ranging module.

[0008] In some embodiments, the base is provided with a protrusion, the shaft branch is fixed to the protrusion, the driving assembly includes a stator and a rotor, the stator is fixed to the protrusion, and the rotor is fixed to the mounting seat.

[0009] In some embodiments, the mounting seat is provided with a hollow cylinder, and at least a portion of the rotor is fixed to the inner wall of the hollow cylinder.

[0010] In some embodiments, an interference fit is formed between the rotor and the inner wall of the hollow cylinder; and / or, an adhesive is provided between the rotor and the inner wall of the hollow cylinder.

[0011] In some embodiments, along the first direction, at least part of the shaft branch protrudes from the raised portion, the inner ring of the bearing is fixed to the part of the shaft branch protruding from the raised portion, the mounting seat is provided with a mounting groove, and the outer ring of the bearing is fixed to the mounting groove.

[0012] In some embodiments, the mounting seat is provided with a connecting portion, and a gap is provided between the connecting portion and the first surface of the protruding portion along the first direction, and the mounting groove is provided on the connecting portion. By providing a gap between the connecting portion and the first surface, the contact between the connecting portion and the first surface can be reduced, thereby reducing the friction between the connecting portion and the first surface.

[0013] In some embodiments, the surface of the connection portion facing the raised portion is provided with an arc portion, the arc portion protrudes toward the first surface, and the arc portion surrounds the shaft branch. By providing the arc portion, when the distance measuring module or other components installed on the mounting seat swing due to movement or the influence of the electromagnetic force of the motor, the arc portion can contact the first surface, thereby correcting the swing of the mounting seat and improving the stability of the rotation mechanism.

[0014] In some embodiments, the shaft branch is integrally formed with the base, or the shaft branch is tightly fitted and fixed to the base.

[0015] In some embodiments, the rotor includes a magnetic ring and a magnetic protection ring, the magnetic ring surrounds the outer side of the stator, the magnetic protection ring is fixed to the outer side of the magnetic ring, and the magnetic protection ring is fixed to the mounting seat. By providing the magnetic protection ring, the magnetism of the magnetic ring can be made more uniform, which is conducive to improving the stability of the rotor rotation.

[0016] In some embodiments, the rotating mechanism further comprises a clamping piece, the shaft branch is provided with a clamping groove, the clamping piece is clamped in the clamping groove, and the clamping piece abuts against the inner ring of the bearing to limit the movement of the bearing along the axial direction of the shaft branch. By providing the clamping piece to limit the movement of the bearing along the axial direction of the shaft branch, the risk of the bearing being separated from the shaft branch can be reduced.

[0017] In some embodiments, the number of bearings is one.

[0018] In order to solve the above technical problems, another technical solution adopted by the embodiment of the utility model is: to provide a radar, including a ranging module and the above-mentioned rotating mechanism, and the ranging module is fixed to a mounting base.

[0019] In some embodiments, the radar includes a receiving coil and a transmitting coil, the receiving coil is disposed on a mounting base, and the transmitting coil is disposed on a base.

[0020] In some embodiments, along the first direction, the receiving coil and the transmitting coil are arranged opposite to each other.

[0021] In some embodiments, along the second direction, the receiving coil and the transmitting coil are arranged inside and outside.

[0022] In order to solve the above technical problems, another technical solution adopted by the embodiment of the utility model is: providing a sweeping machine, including the above radar.

[0023] The beneficial effects of the embodiments of the utility model are as follows: different from the prior art, in the embodiments of the utility model, the radar can be installed on the mounting seat, by fixing the shaft branch to the base, fixing the inner ring of the bearing to the shaft branch, and fixing the outer ring of the bearing to the mounting seat, the shaft branch does not need to rotate relative to the base, which is beneficial to improving the smoothness of the mounting seat during rotation, improving the stability of the rotation speed of the drive component, thereby improving the measurement accuracy of the ranging module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0025] Figure 1 It is a schematic cross-sectional structure diagram of a rotating mechanism in the prior art;

[0026] Figure 2 It is a structural schematic diagram of the rotating mechanism provided in the embodiment of the utility model;

[0027] Figure 3is a schematic cross-sectional structure diagram of a rotating mechanism provided in an embodiment of the utility model at a first cross section;

[0028] Figure 4 yes Figure 3 A magnified view of the area shown in part A;

[0029] Figure 5 It is a schematic cross-sectional structure diagram of a radar in a disassembled state provided in an embodiment of the utility model;

[0030] Figure 6 yes Figure 5 A magnified view of the area shown in part B;

[0031] Figure 7 It is a schematic cross-sectional structure diagram of a local structure of a radar provided in an embodiment of the utility model;

[0032] Figure 8 It is a schematic diagram of the structure of the radar provided in the embodiment of the utility model.

[0033] Figure Number:

[0034] 100. Rotating mechanism; 1. Base; 11. Receiving groove; 12. Raised portion; 121. First surface; 2. Driving assembly; 21. Stator; 211. Coil; 22. Rotor; 221. Magnetic ring; 222. Magnetic protection ring; 3. Mounting seat; 31. Hollow cylinder; 32. Mounting groove; 33. Connecting portion; 331. Arc portion; 332. Limiting buckle; 4. Socket; 5. Shaft branch; 51. Step section; 52. Slot; 6. Bearing; 7. Snap-on; 8. Gap; 200. Distance measurement module; 300. Receiving coil; 400. Transmitting coil; 1000. Radar. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than 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 cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0037] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] See also Figure 2 , Figure 3 and Figure 4 The rotating mechanism 100 includes: a base 1, a driving assembly 2, a mounting seat 3, an axis 5 and a bearing 6, wherein the axis 5 is fixed to the base 1, and the inner ring of the bearing 6 is fixedly arranged on the axis 5. The driving assembly 2 is arranged on the base 1, the mounting seat 3 is fixed to the outer ring of the bearing 6, the mounting seat 3 is connected to the driving assembly 2, the driving assembly 2 is used to drive the mounting seat 3 to rotate relative to the axis 5, the mounting seat 3 can be used to install the ranging module 200, the ranging module 200 can emit laser, and the ranging module 200 can measure the distance between it and the obstacle. In this embodiment, the ranging module 200 can be installed on the mounting seat 3, and the mounting seat 3 and the ranging module 200 are driven to rotate by the driving assembly 2, so that the ranging module 200 can emit laser in multiple directions, which is conducive to expanding the detection range of the ranging module 200, thereby reducing the number of ranging modules 200 on the drone or the car, and reducing the cost of the drone or the car.

[0039] It is worth noting that in Figure 1 In the existing rotating mechanism 100' shown in , since the rotating shaft 31' needs to rotate relative to the fixed module 2', it is necessary to set two bearings 21', and the rotating shaft 31' is set on the two bearings 21'. However, the two bearings 21' are prone to non-concentricity. During the rotation of the rotating shaft 31' and the mounting frame 32', it is easy to cause the mounting frame 32' to rotate unsmoothly, thereby causing the rotation speed of the rotating module 3' to be unstable, affecting the measurement accuracy of the ranging module. In order to solve the above problem, in this embodiment, by fixing the shaft branch 5 to the base 1, the mounting seat 3 can rotate around the shaft branch 5 through the bearing 6. Since the shaft branch 5 does not need to rotate, the mounting seat 3 rotates around the shaft branch 5. This can improve the smoothness of the rotation of the mounting seat 3, thereby improving the stability of the rotation speed of the driving component 2, and further improving the measurement accuracy of the ranging module 200.

[0040] For base 1 above, see Figure 2 , Figure 3 and Figure 4The base 1 is provided with a receiving groove 11 and a protrusion 12, one end of the protrusion 12 is provided on the bottom wall of the receiving groove 11, and the other end of the protrusion 12 extends along the first direction X. At least part of the mounting seat 3 and the driving assembly 2 are accommodated in the receiving groove 11, the driving assembly 2 is provided on the protrusion 12, and the shaft branch 5 is fixed on the protrusion 12.

[0041] For drive assembly 2 above, see Figure 3 and Figure 5 The driving assembly 2 includes a stator 21 and a rotor 22. The stator 21 is sleeved on the protrusion 12, and the stator 21 is fixed to the protrusion 12. The rotor 22 is roughly annular in shape, surrounds the outer side of the stator 21, and is fixed to the mounting seat 3. When the driving assembly 2 is powered on, the rotor 22 can rotate relative to the stator 21, thereby driving the mounting seat 3 to rotate.

[0042] In some embodiments, the stator 21 includes a plurality of coils 211, which are spaced apart around the raised portion 12, and the rotor 22 surrounds the plurality of coils 211. When the plurality of coils 211 are energized, electromagnetic induction occurs between the coils 211 and the rotor 22, thereby causing the rotor 22 to rotate, thereby driving the mounting base 3 to rotate.

[0043] In some embodiments, see Figure 3 and Figure 5 The mounting seat 3 is provided with a hollow cylinder 31, at least part of the rotor 22 is fixed to the inner wall of the hollow cylinder 31, and the surface of the rotor 22 facing away from the stator 21 is fixed to the inner wall of the hollow cylinder 31, so that when the rotor 22 rotates relative to the stator 21, the rotor 22 can drive the mounting seat 3 to rotate.

[0044] In some embodiments, an interference fit is formed between the rotor 22 and the inner wall of the hollow cylinder 31 , and fixation between the rotor 22 and the mounting seat 3 is achieved through the interference fit, which makes assembly convenient and simple.

[0045] In some embodiments, an adhesive (not shown) is provided between the rotor 22 and the inner wall of the hollow cylinder 31 , and the rotor 22 and the mounting seat 31 are fixed by the adhesive.

[0046] In some embodiments, the rotor 22 includes a magnetic ring 221 and a magnetic protection ring 222. The magnetic ring 221 is made of a magnet and surrounds the outer side of the stator 21. The magnetic protection ring 222 is sleeved and fixed on the outer side of the magnetic ring 221. The magnetic protection ring 222 is used to make the magnetism of the magnetic ring 221 more uniform, thereby improving the stability of the rotation of the rotor 22. In this embodiment, by arranging the magnetic protection ring 222 on the outer side of the magnetic ring 221, the magnetism of the magnetic ring 221 is made more uniform, thereby improving the stability of the rotation of the rotor 22, which is conducive to improving the measurement accuracy of the ranging module 200.

[0047] It is understandable that the rotor 22 may not include the magnetic protection ring 222. In this case, the rotor 22 includes a magnetic ring 221, which surrounds the outer side of the stator 21, and the outer side of the magnetic ring 221 is fixed to the inner wall of the hollow cylinder 31. In this way, the use of magnetic protection rings can be reduced, which is conducive to reducing costs.

[0048] In some embodiments, see Figure 4 , Figure 5 and Figure 6 , along the first direction X, the shaft branch 5 at least partially protrudes from the raised portion 12. The inner ring of the bearing 6 is fixed to the portion of the shaft branch 5 protruding from the raised portion 12, the mounting seat 3 is provided with a mounting groove 32, the mounting groove 32 is communicated with the inner cavity of the hollow cylinder 31, the outer ring of the bearing 6 is inserted into the mounting groove 32, and the outer ring of the bearing 6 is fixed to the side wall of the mounting groove 32. In this embodiment, by providing the shaft branch 5 and the bearing 6, the inner ring of the bearing 6 is fixed to the shaft branch 5, and the outer ring of the bearing 6 is fixed to the side wall of the mounting groove 32. When the mounting seat 3 rotates, the mounting seat 3 can rotate around the axis of the shaft branch 5, which is conducive to improving the stability of the mounting seat 3 when rotating.

[0049] In some embodiments, the shaft branch 5 and the base 3 are integrally formed.

[0050] In some embodiments, the shaft branch 5 includes a stepped section 51, the stepped section 51 is received in the raised portion 12, and the shaft branch 5 and the base 1 are injection molded. Specifically, the molding process between the shaft branch 5 and the base 1 is: the shaft branch 5 is placed in a mold, and then the base 1 is injection molded in the mold, thereby obtaining a structure in which the stepped section 51 of the shaft branch 5 is received in the raised portion 12. In this embodiment, by providing the stepped section 51 on the shaft branch 5, the stability of the fixation between the shaft branch 5 and the raised portion 12 can be increased, and the risk of the shaft branch 5 moving relative to the raised portion 12 along the first direction X can be reduced, which is conducive to ensuring the stability of the mounting base 3 and the distance measurement module 200 mounted on the mounting base 3 during rotation.

[0051] In some embodiments, the shaft branch 5 and the base 3 are tightly fitted and fixed.

[0052] In some embodiments, the mounting seat 3 is provided with a connecting portion 33, the above-mentioned mounting groove 32 is provided on the connecting portion 33, and a gap 8 is provided between the connecting portion 33 and the first surface 121 of the protruding portion 12 along the first direction X. In this embodiment, by providing a gap 8 between the connecting portion 33 and the first surface 121 of the protruding portion 12, when the mounting seat 3 rotates around the shaft 5, the risk of friction between the connecting portion 33 and the first surface 121 can be reduced, thereby reducing the resistance of the mounting seat 3 when rotating, and improving the stability of the mounting seat 3 when rotating.

[0053] In some embodiments, the surface of the connecting portion 33 facing the protruding portion 12 is provided with an arc portion 331, the arc portion 331 protrudes toward the first surface 121, and the arc portion 331 is arranged around the shaft branch 5. Along the first direction X, the projection of the arc portion 331 is displaced within the first surface 121. On the first cross section, the boundary of the arc portion 331 is arc-shaped. When the mounting seat 3 and the distance measuring module 200 arranged on the mounting seat 3 are tilted due to gravity imbalance or the influence of the electromagnetic force of the motor, the mounting seat 3 may swing during the rotation process. Therefore, in this embodiment, by providing the arc portion 331, when the mounting seat 3 swings during the rotation process, part of the arc portion 331 can abut against the first surface 121, so that the position of the mounting seat 3 can be corrected, thereby reducing the swing of the mounting seat 3 during the rotation process, and improving the stability of the rotation of the mounting seat 3 and the distance measuring module 200.

[0054] In some embodiments, the connection portion 33 is provided with a limit buckle 332 , which abuts against an end of the outer ring of the bearing 6 facing the first surface 121 , thereby limiting the movement of the mounting seat 3 relative to the bearing 6 along the first direction X.

[0055] In some embodiments, the rotating mechanism 100 also includes a clamping member 7, the shaft branch 5 is provided with a clamping groove 52, the clamping member 7 is clamped in the clamping groove 52, and the clamping member 7 abuts against the end of the inner ring of the bearing 6 that is away from the first surface 121, thereby limiting the movement of the bearing 6 relative to the shaft branch 5 along the axial direction of the shaft branch 5, reducing the risk of the bearing 6 detaching from the shaft branch 5.

[0056] In some embodiments, the number of the bearing 6 is one.

[0057] In some embodiments, not shown in the figure, there are multiple bearings 6 , the inner rings of the multiple bearings 6 are all set on the shaft branch 5 , and the outer rings of the multiple bearings 6 are all fixed to the inner wall of the second hollow cylinder 33 .

[0058] In the embodiment of the utility model, by fixing the shaft branch 5 to the base 1, fixing the inner ring of the bearing 6 to the shaft branch 5, and fixing the outer ring of the bearing 6 to the mounting seat 3, it is beneficial to improve the smoothness of the mounting seat 3 during rotation, improve the stability of the rotation speed of the driving component 2, and thus improve the measurement accuracy of the ranging module 200.

[0059] The utility model also provides a radar 1000 embodiment, please refer to Figure 5 and Figure 7The radar 1000 includes a ranging module 200 and the above-mentioned rotating mechanism 100. The ranging module 200 is fixed to the mounting seat 3 of the rotating mechanism 100, so that the driving component 2 can drive the ranging module 200 to rotate through the mounting seat 3, so that the ranging module 200 can emit lasers in multiple directions, thereby expanding the detection range of the ranging module 200. For other structures and functions of the rotating mechanism 100, please refer to the above-mentioned embodiments, which will not be repeated here.

[0060] In some embodiments, see Figure 5 , Figure 7 and Figure 8 The radar 1000 includes a receiving coil 300 and a transmitting coil 400, wherein the receiving coil 300 is disposed on the mounting seat 3, and the transmitting coil 400 is disposed on the raised portion 12, wherein the transmitting coil 400 is connected to a power source (not shown), the transmitting coil 400 is used to transmit energy, and the receiving coil 300 is used to receive energy provided by the transmitting coil 400.

[0061] In some embodiments, along the first direction X, the receiving coil 300 and the transmitting coil 400 are disposed opposite to each other.

[0062] In some embodiments, the receiving coil 300 and the transmitting coil 400 may be flat coils, or may be coil circuit boards obtained by printing coils on a circuit board, which is not limited in the present application.

[0063] In some embodiments, not shown in the figure, the receiving coil 300 and the transmitting coil 400 can be ring-shaped, the receiving coil 300 can be arranged around the driving component 2, and the transmitting coil 400 can be arranged around the receiving coil 300, which can save space for the radar 1000 in the first direction X.

[0064] In some embodiments, along the second direction, the receiving coil 300 and the transmitting coil 400 are arranged inside and outside, wherein the second direction is perpendicular to the first direction X.

[0065] The utility model also provides an embodiment of a sweeping machine, which includes the above-mentioned radar 1000. For the specific structure and function of the radar 1000, please refer to the above-mentioned embodiment, which will not be described in detail here.

[0066] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A rotating mechanism, It is characterized in that include: Pedestal; Axis branch, fixed to the base; A bearing, the inner ring of which is fixedly disposed on the shaft branch; A driving assembly, disposed on the base; The mounting seat is fixed to the outer ring of the bearing, and the mounting seat is connected to the driving component, and the driving component is used to drive the mounting seat to rotate relative to the shaft branch.

2. The rotating mechanism according to claim 1, It is characterized in that The base is provided with a protrusion, the shaft branch is fixed to the protrusion, the driving assembly includes a stator and a rotor, the stator is fixed to the protrusion, and the rotor is fixed to the mounting seat.

3. The rotating mechanism according to claim 2, It is characterized in that The mounting seat is provided with a hollow cylinder, and at least a part of the rotor is fixed to the inner wall of the hollow cylinder.

4. The rotating mechanism according to claim 3, It is characterized in that An interference fit is formed between the rotor and the inner wall of the hollow cylinder; and / or an adhesive is provided between the rotor and the inner wall of the hollow cylinder.

5. The rotating mechanism according to claim 2, It is characterized in that Along the first direction, at least part of the shaft branch protrudes from the raised portion, the inner ring of the bearing is fixed to the part of the shaft branch protruding from the raised portion, the mounting seat is provided with a mounting groove, and the outer ring of the bearing is fixed to the mounting groove.

6. The rotating mechanism according to claim 5, It is characterized in that The mounting seat is provided with a connecting portion, and along a first direction, there is a gap between the connecting portion and the first surface of the protruding portion, and the mounting groove is provided on the connecting portion.

7. The rotating mechanism according to claim 6, It is characterized in that The surface of the connecting portion facing the protruding portion is provided with an arc portion, the arc portion protrudes toward the first surface, and the arc portion surrounds the shaft branch.

8. The rotating mechanism according to claim 1, It is characterized in that The shaft branch is integrally formed with the base, or the shaft branch is tightly fitted and fixed to the base.

9. The rotating mechanism according to claim 2, It is characterized in that The rotor comprises a magnetic ring and a magnetic protection ring, wherein the magnetic ring surrounds the outer side of the stator, the magnetic protection ring is fixed to the outer side of the magnetic ring, and the magnetic protection ring is fixed to the mounting seat.

10. The rotating mechanism according to claim 6, It is characterized in that The rotating mechanism also includes a clamping piece, the shaft branch is provided with a clamping groove, the clamping piece is clamped in the clamping groove, and the clamping piece abuts against the inner ring of the bearing to limit the movement of the bearing along the axial direction of the shaft branch.

11. The rotating mechanism according to claim 10, It is characterized in that The number of the bearing is one.

12. A radar, It is characterized in that It comprises a distance measuring module and a rotating mechanism as described in any one of claims 1 to 11, and the distance measuring module is fixed to the mounting seat.

13. The radar according to claim 12, It is characterized in that The radar comprises a receiving coil and a transmitting coil, wherein the receiving coil is arranged on the mounting seat, and the transmitting coil is arranged on the base.

14. The radar according to claim 13, It is characterized in that Along the first direction, the receiving coil and the transmitting coil are arranged opposite to each other.

15. The radar according to claim 13, It is characterized in that Along the second direction, the receiving coil and the transmitting coil are arranged inside and outside.

16. A sweeping machine, It is characterized in that Comprising the radar according to any one of claims 12-15.

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