Motor

Abstract

The utility model discloses a motor, and belongs to the technical field of power devices. The motor comprises a base, a rotor and a brake assembly, the brake assembly comprises a coil, a brake part and an elastic part, and the coil is arranged on the base; the brake part is slidably connected with the base and is in circumferential limiting fit with the base, the brake part can move between a first position and a second position, the brake part is separated from the rotor under the condition that the brake part is located at the first position, and the brake part is in circumferential limiting fit with the rotor under the condition that the brake part is located at the second position; the elastic piece is arranged on the base and is connected with the brake piece; when the coil is in a power-on state, the coil drives the brake part to move to the first position, and when the coil is in a power-off state, the elastic part drives the brake part to move to the second position. By adopting the scheme, the motor can be quickly and accurately stopped, and compared with a braking mode of short circuit of a winding of the motor, the service life of the motor can be prolonged, and the energy consumption of the motor can be reduced.

Description

Technical Field

[0001] This application belongs to the technical field of power devices, and particularly relates to an electric motor. Background Art

[0002] An electric motor is a mechanical structure that converts electrical energy into mechanical rotational potential energy. It mainly serves as a power source to connect with mechanical equipment and transmit power to the mechanical equipment. It mainly consists of a stator and a rotor provided with windings. When the windings are energized, a magnetic field can be generated. Under the action of the magnetic field, the rotor rotates and outputs power outward.

[0003] The rotational speed of the electric motor is relatively high under normal operating conditions. When an emergency occurs and the electric motor needs to be quickly stopped, due to the inertia of the electric motor itself, it cannot stop quickly when receiving a stop command. Therefore, in the prior art, a braking effect is generated by short-circuiting the windings of the electric motor, and then the electric motor stops operating. However, if the method of short-circuiting the windings of the electric motor is frequently used to brake the electric motor, it may cause the windings of the electric motor to overheat and be damaged, shortening the service life of the electric motor. In addition, frequently short-circuiting the windings of the electric motor will also increase the energy consumption of the whole machine.

[0004] Therefore, the existing electric motor braking methods have the defects of easily shortening the service life of the electric motor and increasing the energy consumption of the electric motor. Utility Model Content

[0005] The purpose of the embodiments of this application is to provide an electric motor, which can solve the problems that the existing electric motor braking methods easily shorten the service life of the electric motor and increase the energy consumption of the electric motor.

[0006] The embodiments of this application provide an electric motor, including a base, a rotor, and a braking assembly. The braking assembly includes:

[0007] A coil, arranged on the base;

[0008] A braking member, slidably connected to the base and circumferentially limited in cooperation with the base. The braking member can move between a first position and a second position. When the braking member is in the first position, the braking member is separated from the rotor. When the braking member is in the second position, the braking member is circumferentially limited in cooperation with the rotor;

[0009] An elastic member, arranged on the base and connected to the braking member;

[0010] When the coil is in an energized state, the coil drives the braking member to move to the first position. When the coil is in a de-energized state, the elastic member drives the braking member to move to the second position.

[0011] In the embodiment of the present application, when the motor needs to operate normally, power is supplied to the coil to generate a magnetic field in the coil to adsorb the brake member and move it to the first position, so that the brake member is separated from the rotor, and at this time the motor can operate normally; when the motor needs to stop operating, the coil is powered off, and the elastic member drives the brake member to move to the second position, so that the brake member is circumferentially limited and cooperated with the rotor. At this time, the brake member restricts the rotation of the rotor, and thus the motor can be stopped. In this way, the motor can be stopped quickly and accurately. Moreover, compared with the braking method of short-circuiting the winding of the motor, the method of using the elastic member to drive the brake member to brake the rotor will not cause overheating and damage to the winding of the motor, and thus the service life of the motor can be extended, and the energy consumption of the motor can be reduced. Description of the Drawings

[0012] Figure 1 is an exploded view of the motor disclosed in the embodiment of the present application;

[0013] Figure 2 is a cross-sectional view of the motor disclosed in the embodiment of the present application;

[0014] Figure 3 is a three-dimensional view of the base disclosed in the embodiment of the present application;

[0015] Figure 4 is one of the three-dimensional views of the brake member disclosed in the embodiment of the present application;

[0016] Figure 5 is another three-dimensional view of the brake member disclosed in the embodiment of the present application;

[0017] Figure 6 is yet another three-dimensional view of the brake member disclosed in the embodiment of the present application;

[0018] Figure 7 is still another three-dimensional view of the brake member disclosed in the embodiment of the present application;

[0019] Figure 8 is a three-dimensional view of the rotor disclosed in the embodiment of the present application;

[0020] Figure 9 is a three-dimensional view of the motor disclosed in the embodiment of the present application;

[0021] Figure 10 is a top view of the motor disclosed in the embodiment of the present application;

[0022] Figure 11 is a front view of the motor disclosed in the embodiment of the present application;

[0023] Figure 12 is a side view of the motor disclosed in the embodiment of the present application;

[0024] Figure 13 is a rear view of the motor disclosed in the embodiment of the present application.

[0025] Description of the reference numerals in the drawings:

[0026] 100 - Rotor; 110 - Second limiting portion; 200 - Stator winding; 300 - Base;

[0027] 310 - Anti - rotation groove; 311 - First anti - rotation plane; 320 - First annular groove; 330 - Accommodating groove;

[0028] 340 - Connecting convex portion; 341 - Second connecting hole; 400 - Motor housing; 410 - Notch;

[0029] 500 - Brake assembly; 510 - Brake part; 511 - Anti - rotation shaft; 5111 - Second anti - rotation plane;

[0030] 512 - First limiting portion; 513 - Connecting portion; 514 - Mounting groove; 515 - Boss;

[0031] 516 - Second annular groove; 520 - Coil; 521 - Insulating ring; 530 - Elastic member;

[0032] 600 - Output shaft; 700 - Output shaft gear; 800 - Motor fixing bracket; 810 - Through hole;

[0033] 820 - Fixed ear; 900 - Motor connecting wire; 1000 - First screw; 1100 - Second screw. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0035] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0036] Next, the motor provided in the embodiments of the present application will be described in detail in conjunction with the accompanying drawings, through specific embodiments and their application scenarios.

[0037] Reference Figures 1-13 As provided by an embodiment of the present application, a motor may include a base 300, a rotor 100, and a brake assembly 500.

[0038] Among them, the brake assembly 500 may include a brake member 510. The brake member 510 is slidably connected to the base 300 and is circumferentially limited and cooperated with the base 300. The brake member 510 can move between a first position and a second position. When the brake member 510 is in the first position, the brake member 510 is separated from the rotor 100. At this time, the motor can operate normally; when the brake member 510 is in the second position, the brake member 510 can be circumferentially limited and cooperated with the rotor 100. At this time, the brake member 510 restricts the rotation of the rotor 100, and thus the motor can be stopped.

[0039] The brake assembly 500 may further include a coil 520 and an elastic member 530. The coil 520 may be disposed on the base 300, and the elastic member 530 may be disposed on the base 300 and is connected to the brake member 510. When the coil 520 is in an energized state, the coil 520 can drive the brake member 510 to move to the first position. Specifically, when the coil 520 is in an energized state, the coil 520 generates a magnetic field, and the brake member 510 moves to the first position under the action of the magnetic field and is separated from the rotor 100. During the process of the brake member 510 moving to the first position, the elastic member 530 is compressed, causing the elastic member 530 to deform under force; when the coil 520 is in a de-energized state, the elastic member 530 drives the brake member 510 to move to the second position. Specifically, when the coil 520 is de-energized, the magnetic field disappears. At this time, the elastic member 530 recovers its deformation and pushes the brake member 510 to move to the second position, so that the brake member 510 contacts the rotor 100.

[0040] In the embodiment of the present application, the elastic member 530 and the coil 520 are cooperated to drive the brake member 510 to brake the rotor 100, which can quickly and accurately stop the motor. Compared with the braking method of short-circuiting the windings of the motor, it will not cause overheating and damage to the windings of the motor, and thus can extend the service life of the motor and reduce the energy consumption of the motor.

[0041] In an alternative embodiment of the present application, a first limiting portion 512 may be provided on the brake member 510, and a second limiting portion 110 may be provided on the rotor 100. When the brake member 510 is in the second position, the second limiting portion 110 may be in limiting cooperation with the first limiting portion 512 in the circumferential direction of the rotor 100. In this way, compared with the method of realizing the circumferential limiting cooperation between the brake member 510 and the rotor 100 only by the contact between the brake member 510 and the rotor 100, through the circumferential limiting cooperation between the first limiting portion 512 and the second limiting portion 110, the effect of the circumferential limiting cooperation between the brake member 510 and the rotor 100 can be improved, and when the motor is not running, the circumferential limiting cooperation between the first limiting portion 512 and the second limiting portion 110 can make the motor have a self-locking function within a certain range. It should be noted that during the braking process, while the brake member 510 contacts the rotor 100 to generate frictional force, the first limiting portion 512 and the second limiting portion 110 are in circumferential limiting cooperation, thereby improving the braking effect. Of course, when the first limiting portion 512 and the second limiting portion 110 are in circumferential limiting cooperation, the brake member 510 and the rotor 100 may not be in contact.

[0042] In other embodiments, the first limiting portion 512 may not be provided on the brake member 510, and the second limiting portion 110 may not be provided on the rotor 100. When the brake member 510 is in the second position, the brake member 510 contacts the rotor 100.

[0043] In an alternative embodiment, at least two first limiting portions 512 may be provided on the brake member 510, and the first limiting portions 512 may be distributed along the circumferential direction of the brake member 510. At least two second limiting portions 110 may be provided on the rotor 100, and the second limiting portions 110 may be distributed along the circumferential direction of the rotor 100. When the brake member 510 is in the second position, the first limiting portions 512 and the second limiting portions 110 are alternately distributed in the circumferential direction of the rotor 100, and each second limiting portion 110 may be in limiting cooperation with an adjacent first limiting portion 512. In this way, both the effect of the circumferential limiting cooperation between the brake member 510 and the rotor 100 can be improved, and the force balance between the brake member 510 and the rotor 100 can be ensured, thereby extending the service life of the brake member 510 and the rotor 100.

[0044] Specifically, the first limiting portions 512 may be evenly distributed along the circumferential direction of the brake member 510, and the second limiting portions 110 may be evenly distributed along the circumferential direction of the rotor 100. In this way, the force balance between the brake member 510 and the rotor 100 can be further ensured.

[0045] Of course, only one first limiting portion 512 may be provided on the brake member 510, and only one second limiting portion 110 may be provided on the rotor 100.

[0046] In this embodiment, two first limiting portions 512 may be provided on the brake member 510, and the two first limiting portions 512 are arranged oppositely. To facilitate the machining of the two first limiting portions 512, a connecting portion 513 may be reserved between the two first limiting portions 512. In this way, when machining the first limiting portions 512, it is not necessary to disconnect the connection between the two first limiting portions 512, which is beneficial to reducing the machining difficulty, enhancing the structural strength, and saving machining time.

[0047] Here, mounting grooves 514 described below may be provided on both sides of the connecting portion 513, and the edge shape of the connecting portion 513 may be consistent with the shape of the mounting grooves 514 described below. Specifically, the edge shape of the connecting portion 513 and the shape of the mounting grooves 514 may both be arc-shaped, so as to facilitate the machining of the mounting grooves 514.

[0048] Optionally, a boss 515 may be provided on the surface of the brake member 510 close to the rotor 100, the first limiting portion 512 may be provided on the boss 515, a groove may be provided on the surface of the rotor 100 close to the brake member 510, the second limiting portion 110 may be provided in the groove, and the boss 515 may be embedded in the groove, and the side wall of the boss 515 may be in contact with the groove wall. In this way, the circumferential limiting cooperation effect between the brake member 510 and the rotor 100 can be further improved.

[0049] In an alternative embodiment, a buffer member may be provided on at least one of the surface of the rotor 100 close to the brake member 510 and the surface of the brake member 510 close to the rotor 100. In this way, during the process of the brake member 510 moving to the second position, the buffer member can play a buffering role for the brake member 510 and the rotor 100, avoiding mutual wear caused by the collision between the brake member 510 and the rotor 100, and the buffer member can also increase the friction force between the brake member 510 and the rotor 100 to further limit the relative rotation between the brake member 510 and the rotor 100, thereby improving the circumferential limiting effect between the brake member 510 and the rotor 100.

[0050] In other embodiments, no buffer member is provided on either the surface of the rotor 100 close to the brake member 510 or the surface of the brake member 510 close to the rotor 100.

[0051] Optionally, a mounting groove 514 may be provided on the surface of the brake member 510 close to the rotor 100, and a part of the buffer member may be arranged in the mounting groove 514. In this way, it is convenient to disassemble and assemble the buffer member, and the connection stability between the buffer member and the brake member 510 can be improved.

[0052] Of course, the mounting groove 514 may not be provided on the surface of the brake member 510 close to the rotor 100, the buffer member may be bonded to the surface of the brake member 510 close to the rotor 100, or the buffer member may be connected to the brake member 510 through a fixing member.

[0053] Optionally, a plurality of first buffer members may be provided on a surface of the rotor 100 close to the brake member 510, and a plurality of second buffer members may also be provided on a surface of the brake member 510 close to the rotor 100, and the first buffer members and the second buffer members may be arranged in a staggered manner.

[0054] In an alternative embodiment of the present application, an anti-rotation groove 310 may be provided on one of the base 300 and the brake member 510, and an anti-rotation shaft 511 may be provided on the other. The anti-rotation shaft 511 and the anti-rotation groove 310 may slide relative to each other along the axial direction of the rotor 100, and the anti-rotation shaft 511 and the anti-rotation groove 310 are in circumferential limiting cooperation. In this way, compared with the method of providing a sliding groove on the motor housing 400 described below, enabling the brake member 510 to be slidably connected to the sliding groove and in circumferential limiting cooperation, there is no need to change the structure of the motor housing 400, which is beneficial to reducing the processing cost.

[0055] Here, the anti-rotation groove 310 may be provided on the base 300, and the anti-rotation shaft 511 may be provided on the brake member 510.

[0056] In this embodiment, a first anti-rotation plane 311 may be provided on the groove wall of the anti-rotation groove 310, and a second anti-rotation plane 5111 may be provided on the anti-rotation shaft 511. The first anti-rotation plane 311 and the second anti-rotation plane 5111 are in contact with each other to limit the relative rotation between the anti-rotation groove 310 and the anti-rotation shaft 511.

[0057] In other embodiments, neither the anti-rotation groove 310 nor the anti-rotation shaft 511 may be provided on the base 300 and the brake member 510. A sliding groove may be provided on the motor housing 400, and the brake member 510 is slidably connected to the sliding groove and in circumferential limiting cooperation.

[0058] In an alternative embodiment, a first annular groove 320 may be provided on the base 300, a second annular groove 516 may be provided on the brake member 510, and both ends of the elastic member 530 may be respectively located in the first annular groove 320 and the second annular groove 516, and the first annular groove 320 and the second annular groove 516 may be coaxially arranged. In this way, it is convenient to install the elastic member 530, and the first annular groove 320 and the second annular groove 516 can limit the elastic member 530 to prevent the elastic member 530 from being misaligned under force and being bent sideways to fail, thereby being unable to drive the brake member 510 and causing the brake member 510 to fail to perform the braking function.

[0059] Here, the elastic member 530 may be a spring.

[0060] Of course, the first annular groove 320 may not be provided on the base 300, the second annular groove 516 may not be provided on the brake member 510, and both ends of the elastic member 530 may respectively abut against the end face of the base 300 and the end face of the brake member 510.

[0061] In this embodiment, the elastic member 530 may be sleeved outside the anti-rotation shaft 511. In this way, the anti-rotation shaft 511 can play a limiting role on the elastic member 530, and can make the elastic member 530 deform more precisely along the axial direction of the rotor 100.

[0062] In an alternative embodiment, the base 300 may be provided with a receiving groove 330, and the coil 520 may be located in the receiving groove 330. In this way, it is convenient for the coil 520 to be connected to the base 300, and there is no need to additionally provide a component for connecting the coil 520 and the base 300.

[0063] In other embodiments, the receiving groove 330 may not be provided on the base 300, and the coil 520 may be directly sleeved outside the base 300.

[0064] In addition, an insulating member may be provided between the coil 520 and the groove wall of the receiving groove 330 to prevent the coil 520 from making electrical contact with the base 300. And, an insulating ring 521 may be provided at the notch of the receiving groove 330, and the insulating ring 521 may be used to block the notch of the receiving groove 330. Here, the insulating ring 521 blocks the notch of the receiving groove 330. On the one hand, it can prevent the coil 520 from coming out of the receiving groove 330, and on the other hand, it can prevent the coil 520 from making electrical contact with the brake member 510 or other components of the motor. Of course, the insulating ring 521 may not be provided at the notch of the receiving groove 330.

[0065] In this embodiment, the insulating member may be a solid insulating glue. Specifically, after the coil 520 is placed in the receiving groove 330, liquid insulating glue may be poured into the receiving groove 330, and when the liquid insulating glue solidifies into solid insulating glue, the insulating member is formed.

[0066] Of course, the insulating member may be an insulating sleeve, and the insulating sleeve is sleeved outside the coil 520. Here, the insulating sleeve may be made of plastic.

[0067] In an alternative embodiment of the present application, the motor may further include a stator winding 200 and a motor housing 400. In one way, the stator winding 200 may be sleeved outside the rotor 100, and the base 300 may be detachably connected to the stator winding 200 or the motor housing 400. In this way, the brake assembly 500 can be applied to an inner-rotor motor; in another way, the rotor 100 may be sleeved outside the stator winding 200, and the base 300 may be detachably connected to the motor housing 400. In this way, the brake assembly 500 can be applied to an outer-rotor motor.

[0068] Moreover, the base 300 is detachably connected to the stator winding 200 or the motor housing 400. In this way, the brake assembly 500 can be flexibly disassembled and assembled with the stator winding 200 or the motor housing 400, facilitating replacement or repair, and being conducive to improving the maintenance efficiency of the motor. Of course, the base 300 can also be non-detachably connected to the stator winding 200 or the motor housing 400.

[0069] Optionally, the base 300 can be connected to the motor housing 400 by the first screw 1000. Specifically, at least two connecting convex portions 340 can be provided on the outer wall of the base 300, and the connecting convex portions 340 can be distributed along the circumferential direction of the base 300. At least two first connecting holes can be provided on the motor housing 400, and the first connecting holes can be distributed along the circumferential direction of the motor housing 400. Second connecting holes 341 can be provided on each of the connecting convex portions 340, and the second connecting holes 341 respectively correspond to the first connecting holes. The first screw 1000 can pass through the second connecting hole 341 and be connected to the first connecting hole to connect the base 300 to the motor housing 400.

[0070] Here, at least two notches 410 can be provided on the motor housing 400, and each of the connecting convex portions 340 can be respectively embedded in each of the notches 410. In this way, it can not only increase the contact area between the motor housing 400 and the base 300, but also prevent the connecting convex portions 340 from being exposed, thereby being conducive to improving the aesthetics of the motor.

[0071] In an alternative embodiment, when the stator winding 200 is sleeved outside the rotor 100, the brake assembly 500 can further include a first magnetic field shielding member and a second magnetic field shielding member. The first magnetic field shielding member can be connected to the base 300, and the first magnetic field shielding member can be located on the side of the coil 520 away from the brake member 510; the second magnetic field shielding member can be provided on the side of the brake member 510 close to the rotor 100, and the second magnetic field shielding member can be circumferentially limited and cooperated with the rotor 100, or the second magnetic field shielding member can be provided on the side of the rotor 100 away from the brake member 510. In this way, the first magnetic field shielding member and the second magnetic field shielding member can shield the magnetic field generated by the coil 520 to avoid the magnetic field generated by the coil 520 having an adverse impact on the magnetic field generated by the stator winding 200 and affecting the normal operation of the motor.

[0072] Here, the magnetic field generated by the coil 520 is perpendicular to the magnetic field generated by the stator winding 200.

[0073] In this embodiment, both the first magnetic field shielding member and the second magnetic field shielding member can be made of silicon steel sheets.

[0074] In other embodiments, the brake assembly 500 may not include the first magnetic field shielding member and the second magnetic field shielding member.

[0075] In this embodiment, the motor may further include an output shaft 600 and an output shaft gear 700 disposed on the output shaft 600. One end of the output shaft 600 may pass through the stator winding 200 and be connected to the rotor 100.

[0076] Moreover, the motor may further include a motor fixing bracket 800. The motor fixing bracket 800 may be disposed on a side of the motor housing 400 away from the base 300. The motor fixing bracket 800 may be connected to the motor housing 400 by a second screw 1100. A through hole 810 for the output shaft 600 to pass through may be provided on the motor fixing bracket 800.

[0077] Here, at least two fixing lugs 820 may be provided on the motor fixing bracket 800. The fixing lugs 820 may be circumferentially distributed along the motor fixing bracket 800. The fixing lugs 820 are used for connecting to other devices.

[0078] In addition, the motor may further include a motor connection line 900. The motor connection line 900 is used for electrically connecting to the windings of the stator winding 200 to supply power to the windings of the stator winding 200. Specifically, the motor connection line 900 may be a flat cable.

[0079] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A motor, characterized in that: The invention comprises a base (300), a rotor (100) and a brake assembly (500), wherein the brake assembly (500) comprises: A coil (520) is disposed on the base (300); a brake member (510) slidably connected to the base (300) and circumferentially limited with the base (300); the brake member (510) is movable between a first position and a second position; when the brake member (510) is located at the first position, the brake member (510) is separated from the rotor (100); and when the brake member (510) is located at the second position, the brake member (510) is circumferentially limited with the rotor (100); An elastic member (530) is disposed on the base (300) and connected to the brake member (510); When the coil (520) is in an energized state, the coil (520) drives the brake member (510) to move to the first position, and when the coil (520) is in an energized state, the elastic member (530) drives the brake member (510) to move to the second position.

2. The motor according to claim 1, characterized in that The brake component (510) is provided with a first limiting portion (512), and the rotor (100) is provided with a second limiting portion (110). When the brake component (510) is located at the second position, the second limiting portion (110) can cooperate with the first limiting portion (512) in a circumferential direction of the rotor (100).

3. The motor according to claim 2, characterized in that The brake component (510) is provided with at least two first limiting portions (512), and each of the first limiting portions (512) is distributed along the circumference of the brake component (510); and the rotor (100) is provided with at least two second limiting portions (110), and each of the second limiting portions (110) is distributed along the circumference of the rotor (100); When the brake member (510) is located at the second position, each of the first limiting portions (512) and each of the second limiting portions (110) are alternately distributed in the circumferential direction of the rotor (100), and each of the second limiting portions (110) can be limited and cooperated with the adjacent first limiting portions (512).

4. The motor according to claim 1, characterized in that A buffer is provided on at least one of a surface of the rotor (100) close to the brake component (510) and a surface of the brake component (510) close to the rotor (100).

5. The motor according to claim 4, characterized in that A mounting groove (514) is provided on a surface of the brake component (510) close to the rotor (100), and a portion of the buffer component is disposed in the mounting groove (514).

6. The motor according to claim 1, characterized in that An anti-rotation groove (310) is provided on one of the base (300) and the brake member (510), and an anti-rotation shaft (511) is provided on the other. The anti-rotation shaft (511) and the anti-rotation groove (310) can slide relative to each other along the axial direction of the rotor (100), and the anti-rotation shaft (511) and the anti-rotation groove (310) cooperate at the circumferential upper limit position of the rotor (100).

7. The motor according to claim 1, characterized in that The base (300) is provided with a first annular groove (320), the brake member (510) is provided with a second annular groove (516), the two ends of the elastic member (530) are respectively located in the first annular groove (320) and the second annular groove (516), and the first annular groove (320) and the second annular groove (516) are coaxially arranged.

8. The motor according to claim 1, characterized in that The base (300) is provided with a receiving groove (330), the coil (520) is located in the receiving groove (330), an insulating member is provided between the coil (520) and the groove wall of the receiving groove (330), an insulating ring (521) is provided at the notch of the receiving groove (330), and the insulating ring (521) is used to seal the notch of the receiving groove (330).

9. The motor according to claim 1, characterized in that The motor further comprises a stator winding (200) and a motor housing (400); The stator winding (200) is sleeved outside the rotor (100), and the base (300) is detachably connected to the stator winding (200) or the motor housing (400); Alternatively, the rotor (100) is sleeved outside the stator winding (200), and the base (300) is detachably connected to the motor housing (400).

10. The motor according to claim 9, characterized in that When the stator winding (200) is sleeved outside the rotor (100), the brake assembly (500) further comprises: a first magnetic field shielding component, the first magnetic field shielding component being connected to the base (300), and the first magnetic field shielding component being located on a side of the coil (520) away from the brake component (510); A second magnetic field shielding component, wherein the second magnetic field shielding component is arranged on a side of the brake component (510) close to the rotor (100), and the second magnetic field shielding component can be circumferentially limited with the rotor (100), or the second magnetic field shielding component is arranged on a side of the rotor (100) away from the brake component (510).

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