CN218416087U

CN218416087U - Electromagnetic brake and motor

Info

Publication number: CN218416087U
Application number: CN202222805804.1U
Authority: CN
Inventors: 张敏
Original assignee: Weton Electronics Co ltd
Current assignee: Weton Electronics Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-01-31
Anticipated expiration: 2032-10-24

Abstract

The utility model discloses an electromagnetic braking ware and motor, the cover is equipped with the bearing on the motor shaft that the motor was established, electromagnetic braking ware includes coil pack, clamping component and friction disc, coil pack includes coil base and locates the coil on the coil base, the coil base is equipped with the mounting groove that is used for installing the bearing, the coil base runs through to be offered and is used for supplying the motor shaft to pass and with the through-hole of mounting groove intercommunication, clamping component includes with coil base swing joint magnetism inhale the piece and both ends respectively with magnetism inhale the elastic component that piece and coil base are connected, the friction disc is used for being connected with the motor shaft, coil pack is used for attracting magnetism to inhale the piece when the circular telegram and keeps away from the friction disc, and make the elastic component produce deformation, the elastic component is used for restoring to the throne and drives magnetism to inhale the piece and is close to the friction disc in order to press from both sides the magnetism with the friction disc and inhale between piece and the coil base. The utility model discloses an electromagnetic brake is through offering the mounting groove of installation bearing on the coil base to can make the length of motor shaft shorten, and then make the total length of motor shorten.

Description

Electromagnetic brake and motor

Technical Field

The utility model relates to the technical field of electrical apparatus, especially, relate to an electromagnetic braking ware and motor.

Background

As an important component in smart manufacturing, a motor may drive a mechanism in motion. In order to ensure that the motor can safely operate, a brake is required to be arranged in the motor, and the brake carries out power-off protection and power-off maintenance on the motor. However, the existing brake is sleeved on the motor shaft to brake the motor shaft, and since the brake needs to be sleeved on the motor shaft, the length of the motor shaft is lengthened, and thus the overall length of the motor is lengthened.

In view of the above-mentioned drawbacks, there is a need for a new electromagnetic brake and motor.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing an electromagnetic braking ware and motor aims at solving current motor because the setting of stopper and the longer problem of length.

In order to achieve the above object, the utility model provides an electromagnetic brake is applied to the motor, the cover is equipped with the bearing on the motor shaft of motor, electromagnetic brake includes:

the coil assembly comprises a coil base and a coil arranged on the coil base, the coil base is provided with a mounting groove for mounting the bearing, and the coil base is provided with a through hole which is used for the motor shaft to pass through and is communicated with the mounting groove in a penetrating manner;

the clamping assembly comprises a magnetic part and an elastic part, the magnetic part is movably connected with the coil holder, and two ends of the elastic part are respectively connected with the magnetic part and the coil holder;

the friction plate is used for being connected with the motor shaft, the coil assembly is used for attracting the magnetic attraction piece to be away from the friction plate when the motor shaft is powered on, the elastic piece is deformed, and the elastic piece is used for resetting and driving the magnetic attraction piece to be close to the friction plate so as to clamp the friction plate between the magnetic attraction piece and the coil base.

Preferably, the coil holder includes interconnect's pedestal and butt dish, the coil is located on the pedestal, the pedestal is kept away from the one end indent of butt dish is formed with the mounting groove, the through-hole runs through in proper order the pedestal with the butt dish, the elastic component with the pedestal is connected, the pedestal with form the confession between the butt dish the active free space of magnetic attraction spare activity, the friction disc is located magnetic attraction spare with between the butt dish, the coil pack is used for when the circular telegram and attracts magnetic attraction spare is kept away from the butt dish is in order to loosen the friction disc, the elastic component is used for restoring to the throne and drives magnetic attraction spare is close to the butt dish with the friction disc clamp in magnetic attraction spare with between the butt dish.

Preferably, a fixing groove is formed in the concave end of the base body close to the abutting disc, the concave direction of the fixing groove is consistent with the extending direction of the motor shaft, and one end, far away from the magnetic part, of the elastic part is fixed in the fixing groove.

Preferably, the number of the elastic members is plural, the fixing grooves are provided in one-to-one correspondence with the elastic members, and the fixing grooves are provided around the periphery of the through hole.

Preferably, the butt joint dish with the pedestal is connected through a plurality of connecting bolt, and is a plurality of connecting bolt follows the circumference setting of butt joint dish, it offers a plurality of grooves of dodging to inhale on the piece, and is a plurality of dodge groove and a plurality of connecting bolt one-to-one setting, just dodge the groove and dodge the correspondence connecting bolt.

Preferably, each connecting bolt is provided with a guide sleeve, the guide sleeve is located between the seat body and the abutting disc, and the guide sleeve is in sliding connection with the avoiding groove.

Preferably, the outer periphery of the motor shaft is provided with a flange, and the friction plate is provided with a fixing hole for fixing the flange.

Preferably, the flange is a square ring structure, the flange defines a mounting hole for inserting the motor shaft, and the fixing hole is a square hole.

In addition, in order to realize above-mentioned purpose, the utility model discloses still provide a motor, the motor includes the shell and all locates motor shaft, bearing in the shell and as above electromagnetic braking ware, electromagnetic braking ware includes the coil base, the coil base is equipped with the mounting groove and the through-hole of mutual intercommunication, the bearing is fixed in the mounting groove, the motor shaft passes the through-hole is fixed in the bearing.

Preferably, the motor further comprises an encoder arranged in the shell, the coil holder is connected with the encoder, one end, extending out of the shell, of the motor shaft is an extending end, and the encoder is located on one side, far away from the extending end, of the electromagnetic brake.

The utility model discloses among the technical scheme, the cover is equipped with the bearing on the motor shaft of motor, and electromagnetic braking ware includes coil pack, clamping component and friction disc, and coil pack includes the coil holder and locates the coil on the coil holder, and clamping component includes magnetism and inhales piece and elastic component, magnetism and inhale piece and coil holder swing joint, and the both ends of elastic component are connected with magnetism respectively and inhale piece and coil holder. During the equipment, can pass the through-hole on the coil base earlier, because the mounting groove on the coil base is observed to the through-hole, the motor shaft also can pass the mounting groove to establish the position that the bearing housing is located the mounting groove at the motor shaft, until the bearing installs completely in the mounting groove, at this moment, the inner circle and the motor shaft butt of bearing, the outer lane of bearing and the cell wall butt of mounting groove. When the motor is electrified, the coil assembly is electrified and generates a magnetic field to attract the magnetic attraction piece to be far away from the friction plate, and the elastic piece is deformed to separate the friction plate from the motor shaft, so that the rotation of the motor shaft is not influenced by the braking of the friction plate and can work normally; when the motor is powered off, the coil assembly is powered off and loses the magnetic field, the elastic piece resets under the action of self elasticity, the magnetic attraction piece is pushed to be close to the friction plate due to the reset of the elastic piece, and the friction plate is clamped between the magnetic attraction piece and the coil seat under the action of the elasticity of the elastic piece. The utility model discloses an electromagnetic brake is through seting up the mounting groove of installation bearing on the coil base, through installing the epaxial bearing of motor in the mounting groove of coil base, can be so that the epaxial bearing of motor is located the position that the coil base was inserted to the motor shaft to can make the length of motor shaft shorten, and then make the total length of motor shorten.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a motor according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A schematic sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along line B-B in FIG. 1;

FIG. 4 is a schematic cross-sectional view taken along line C-C of FIG. 1;

fig. 5 is an exploded view of an embodiment of the present invention;

fig. 6 is an exploded view of another view angle of the motor according to an embodiment of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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 of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The utility model provides an electromagnetic braking ware and motor aims at solving current motor because the setting of stopper and the longer problem of length.

Referring to fig. 1 to 3 and 5, an electromagnetic brake is applied to a motor, a bearing 20 is sleeved on a motor shaft 10 of the motor, the electromagnetic brake includes a coil assembly 1, a clamping assembly 2 and a friction plate 3, the coil assembly 1 includes a coil base 11 and a coil disposed on the coil base 11, the coil base 11 is provided with a mounting groove 111 for mounting the bearing 20, the coil base 11 is provided with a through hole 112 for the motor shaft 10 to pass through and communicate with the mounting groove 111, the clamping assembly 2 includes a magnetic attraction element 21 and an elastic element 22, the magnetic attraction element 21 is movably connected with the coil base 11, two ends of the elastic element 22 are respectively connected with the magnetic attraction element 21 and the coil base 11, the friction plate 3 is used for being connected with the motor shaft 10, the coil assembly 1 is used for attracting the magnetic attraction element 21 to be away from the friction plate 3 when the motor is powered on, and causing the elastic element 22 to deform, and the elastic element 22 is used for resetting and driving the magnetic attraction element 21 to be close to the friction plate 3 so as to clamp the friction plate 3 between the magnetic attraction element 21 and the coil base 11.

The electromagnetic brake of this specification embodiment can include coil pack 1, clamping component 2 and friction disc 3, and coil pack 1 includes coil base 11 and locates the coil on the coil base 11, and clamping component 2 can include magnetism and inhale piece 21 and elastic component 22, and magnetism is inhaled piece 21 and coil base 11 swing joint, and the both ends of elastic component 22 are connected with magnetism respectively and inhale piece 21 and coil base 11.

During assembly, the motor shaft 10 can firstly pass through the through hole 112 on the coil holder 11, and the through hole 112 observes the installation groove 111 on the coil holder 11, so that the motor shaft 10 can also pass through the installation groove 111, and the bearing 20 is sleeved at the position of the motor shaft 10 in the installation groove 111 until the bearing 20 is completely installed in the installation groove 111, at this time, the inner ring of the bearing 20 is abutted against the motor shaft 10, and the outer ring of the bearing 20 is abutted against the groove wall of the installation groove 111. When the motor is electrified, the coil assembly 1 is electrified and generates a magnetic field to attract the magnetic attraction piece 21 to be far away from the friction plate 3, and the elastic piece 22 is deformed to separate the friction plate 3 from the motor shaft 10, so that the rotation of the motor shaft 10 is not influenced by the braking of the friction plate 3 and can work normally; when the motor is powered off, the coil assembly 1 is powered off and loses the magnetic field, the elastic element 22 is reset under the action of the elastic force of the elastic element 22, the magnetic attraction element 21 is pushed to be close to the friction plate 3 due to the reset of the elastic element 22, and the friction plate 3 is clamped between the magnetic attraction element 21 and the coil holder 11 under the action of the elastic force of the elastic element 22.

Wherein, in order to make the motor shaft 10 can normally rotate, can respectively install a bearing 20 with the front and back end of motor, electromagnetic braking ware is located the rear portion of motor, installs in the mounting groove 111 of coil bracket 11 in the bearing 20 who installs in the rear portion of motor, and the inside coil bracket 11 that places in of bearing 20 borrows coil bracket 11 thickness space, can save motor shaft 10 length to reduce the whole length of motor. Wherein, the coil base 11 can be installed on the rear end cover plate of the motor through screws. The utility model discloses an electromagnetic braking is through offering mounting groove 111 of installation bearing 20 on coil block 11, through installing bearing 20 on motor shaft 10 in mounting groove 111 of coil block 11, can be so that bearing 20 on the motor shaft 10 is located the position that motor shaft 10 inserted coil block 11 to can make the length of motor shaft 10 shorten a bearing 20's thickness, and then make the total length of motor shorten.

Referring to fig. 2 and 6, in an embodiment, the coil base 11 includes a base 113 and a contact plate 114 connected to each other, the coil is disposed on the base 113, an installation slot 111 is formed in a concave portion of one end of the base 113 away from the contact plate 114, a through hole 112 sequentially penetrates through the base 113 and the contact plate 114, the elastic element 22 is connected to the base 113, a moving space 115 for the magnetic element 21 to move is formed between the base 113 and the contact plate 114, the friction plate 3 is disposed between the magnetic element 21 and the contact plate 114, the coil assembly 1 is configured to attract the magnetic element 21 away from the contact plate 114 to release the friction plate 3 when powered on, and the elastic element 22 is configured to reset and drive the magnetic element 21 to approach the contact plate 114 to clamp the friction plate 3 between the magnetic element 21 and the contact plate 114. For assembly, the coil holder 11 includes a holder body 113 and a contact plate 114 connected to each other, and a movable space 115 for the magnetic element 21 to move is formed between the holder body 113 and the contact plate 114 after the holder body 113 and the contact plate 114 are connected. During assembly, the abutting disc 114 is firstly sleeved on the motor shaft 10, the friction plate 3 is sleeved on the motor shaft 10, the magnetic member 21 is sleeved on the motor shaft 10, the elastic member 22 is connected with the seat body 113, the seat body 113 is sleeved on the motor shaft 10, and the abutting disc 114 and the seat body 113 are connected, so that the elastic member 22 abuts between the seat body 113 and the magnetic member.

Further, a fixing groove 1131 is concavely formed at one end of the seat body 113 close to the abutting disc 114, the concave direction of the fixing groove 1131 is the same as the extending direction of the motor shaft 10, and one end of the elastic element 22 far away from the magnetic element 21 is fixed in the fixing groove 1131. In one embodiment, the elastic element 22 is a compression spring, one end of the seat body 113 near the abutting disc 114 is recessed to form a fixing groove 1131, one end of the compression spring is inserted into the fixing groove 1131 and is connected to a groove bottom wall of the fixing groove 1131, and the other end of the compression spring is connected to the magnetic element 21. The compression spring compression is in fixed slot 1131 to the protection compression spring receives the compressive force that exceeds its limit, and when compression spring reset, fixed slot 1131 can have the effect of direction to compression spring, thereby can make compression spring to the elasticity of magnetism piece 21 of inhaling can follow the extending direction setting of fixed slot 1131, and the extending direction of fixed slot 1131 is unanimous with the extending direction of motor shaft 10.

Further, the number of the elastic members 22 is plural, the fixing grooves 1131 are disposed in one-to-one correspondence with the elastic members 22, and the fixing grooves 1131 are disposed around the periphery of the through hole 112. In an embodiment, the number of the elastic members 22 is 3, the number of the fixing grooves 1131 is also 3, 3 fixing grooves 1131 are arranged around the periphery of the through

hole

112, 3 elastic members 22 are arranged in the 3 fixing grooves 1131 in a one-to-one correspondence manner, and under the action of the 3 elastic members 22, the magnetic attraction member 21 can be stably close to the friction plate 3, and can abut against the friction plate 3 through 3 places, so that the friction force between the magnetic attraction member 21 and the friction plate 2 is larger, and the braking is more reliable.

In addition, in an embodiment, the abutting tray 114 is connected to the base 113 through a plurality of connecting bolts 116, the plurality of connecting bolts 116 are disposed along the circumferential direction of the abutting tray 114, the magnetic attraction member 21 is disposed with a plurality of avoiding grooves 211, the plurality of avoiding grooves 211 are disposed in one-to-one correspondence with the plurality of connecting bolts 116, and the avoiding grooves 211 avoid the corresponding connecting bolts 116. In order to make the connection between the abutting disc 114 and the seat body 113 firm, a plurality of connecting bolts 116 may be provided to connect the abutting disc 114 and the seat body 113, the plurality of connecting bolts 116 are provided along the circumferential direction of the abutting disc 114, the abutting disc 114 is provided with through holes for inserting the abutting bolts, the seat body 113 is provided with threaded holes for screwing the connecting bolts 116, the through holes and the threaded holes are provided in a one-to-one correspondence, each connecting bolt 116 sequentially passes through the through holes on the abutting disc 114 and screws into the corresponding threaded hole on the seat body 113, so that the abutting disc 114 and the seat body 113 can be firmly connected. Because the connecting bolt 116 is disposed in the movable space 115 between the seat body 113 and the abutting disk 114, in order to prevent the connecting bolt 116 from obstructing the movement of the magnetic attraction piece 21, an avoiding groove 211 avoiding the connecting bolt 116 can be disposed on the magnetic attraction piece 21, and the avoiding groove 211 can be configured to be communicated with the periphery of the magnetic attraction piece 21, thereby facilitating the manufacture of the magnetic attraction piece 21.

Wherein, each connecting bolt 116 is provided with a guide sleeve 117, the guide sleeve 117 is located between the seat body 113 and the abutting disk 114, and the guide sleeve 117 is slidably connected with the corresponding avoiding groove 211. In order to make the movement position of the magnetic attraction piece 21 in the movement space 115 more accurate, a guiding structure may be provided to guide the movement of the magnetic attraction piece 21, a guiding sleeve 117 may be sleeved on each connecting bolt 116, and the guiding sleeve 117 may slide with the avoiding groove 211 of the magnetic attraction piece 21. When the magnetic attraction piece 21 moves back and forth between the seat body 113 and the abutting disc 114, the magnetic attraction piece 21 can be accurately aligned with the friction plate 3 due to the guiding function of the guide sleeve 117, so that the brake can be accurately and reliably performed. Moreover, when the braking member brakes the motor shaft 10, the braking member receives the acting force of the motor shaft 10 and generates an acting force on the magnetic member 21, and the magnetic member 21 avoids the groove wall of the groove 211 to abut against the guide sleeve 117, so that the magnetic member cannot be displaced in the radial direction of the motor shaft 10, and the braking reliability is further ensured.

Further, in order to perform various functions, the outer circumference of the motor shaft 10 is provided with a flange 101, and the friction plate 3 is provided with a fixing hole 31 for fixing the flange 101. The outer periphery of the motor shaft 10 is provided with a flange 101, the flange 101 can be integrally formed with the motor shaft 10, for example, the motor shaft 10 is formed by turning and has a flange 101 structure, the flange 101 and the motor shaft 10 can also be two independent parts, and when the flange 101 is in a gear structure, the hole wall of the fixing hole 31 formed in the friction plate 3 is in a tooth-shaped structure meshed with the gear.

In the above embodiment, referring to fig. 6, the flange 101 has a square ring structure, the flange 101 surrounds a mounting hole for inserting the motor shaft 10, and the fixing hole 31 is a square hole. When the motor shaft 10 is rotated, the flange 101 rotates with the motor shaft 10. The periphery of flange 101 and friction disc 3 cooperation, when the motor circular telegram, electromagnetic braking ware circular telegram, the piece 21 armature is inhaled with the actuation of coil base 11 to magnetism, and motor shaft 10 drives the brake disc rotation through flange 101, and coil base 11 then is fixed motionless, and when the motor outage, when electromagnetic braking ware circular telegram, the elastic component 22 resets and drives magnetism and inhale piece 21 and press from both sides friction disc 3 between piece 21 armature is inhaled to magnetism and butt dish 114, and friction disc 3 stops motor shaft 10 through flange 101 and rotates, realizes the motor braking.

Further, a guide slope is provided at the notch of the mounting groove 111. To facilitate the installation of the bearing 20 into the mounting groove 111, a chamfer, i.e., a guide slope, may be provided at the notch of the mounting groove 111. When the bearing 20 is installed in the installation groove 111, the outer ring of the bearing 20 can smoothly enter the installation groove 111 under the guiding action of the guiding slope, so that the installation of the bearing 20 is more convenient and labor-saving.

Additionally, the utility model discloses still provide a motor, motor include the shell and all locate motor shaft 10, bearing 20 in the shell and as above electromagnetic braking ware, electromagnetic braking ware includes coil base 11, and coil base 11 is equipped with mounting groove 111 and the through-hole 112 that communicates each other, and in bearing 20 was fixed in mounting groove 111, motor shaft 10 passed through-hole 112 and was fixed in bearing 20. The both ends of the motor shaft 10 of motor are installation end and stretch out the end, and all rotate with the shell and be connected, and the installation end is located the shell, stretches out the end and rotates with the shell and be connected and stretch out the shell, is equipped with the stator in the shell, and the motor shaft passes the stator in the shell, and when the coil circular telegram of stator, the motor shaft rotates, and electromagnetic braking ware cover establishes the periphery at the installation end to be located the stator and keep away from the one side that stretches out the end. The specific structure of the electromagnetic brake in the motor refers to the above embodiments, and since the motor adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

In an embodiment, the motor may further include an encoder 30 disposed in the housing, the coil holder 11 is connected to the encoder 30, an end of the motor shaft 10 extending out of the housing is an extending end, and the encoder 30 is located on a side of the electromagnetic brake away from the extending end. The base body 113 of the coil base 11 is fixed on the rear end cover plate of the motor, the encoder 30 can be directly fixed on the base body 113, and the encoder 30 is positioned on one side of the electromagnetic brake far away from the extending end, so that the overall length of the motor can be further reduced. Furthermore, the connecting portion of the encoder 30 is made of a non-magnetic material, and does not generate magnetic field interference with the coil block 1.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. The utility model provides an electromagnetic brake, is applied to the motor, the cover is equipped with the bearing on the motor shaft of motor, its characterized in that, electromagnetic brake includes:

the coil assembly comprises a coil base and a coil arranged on the coil base, the coil base is provided with a mounting groove for mounting the bearing, and the coil base is provided with a through hole which is used for the motor shaft to pass through and communicated with the mounting groove in a penetrating manner;

the friction disc is used for being connected with the motor shaft, the coil assembly is used for attracting the magnetic attraction piece to be far away from the friction disc when the motor is powered on, the elastic piece is made to deform, and the elastic piece is used for resetting and driving the magnetic attraction piece to be close to the friction disc so as to clamp the friction disc between the magnetic attraction piece and the coil base.

2. The electromagnetic brake of claim 1, wherein the coil seat includes a seat body and a butt plate connected to each other, the coil is disposed on the seat body, the mounting groove is formed in a concave end of the seat body away from the butt plate, the through hole sequentially penetrates through the seat body and the butt plate, the elastic member is connected to the seat body, a moving space for the magnetic attraction member to move is formed between the seat body and the butt plate, the friction plate is disposed between the magnetic attraction member and the butt plate, the coil assembly is configured to attract the magnetic attraction member away from the butt plate when the coil assembly is powered on to release the friction plate, and the elastic member is configured to reset and drive the magnetic attraction member to approach the butt plate to clamp the friction plate between the magnetic attraction member and the butt plate.

3. The electromagnetic brake of claim 2, wherein the seat body has a fixing groove formed at a concave end thereof adjacent to the abutting plate, the concave direction of the fixing groove is the same as the extending direction of the motor shaft, and the end of the elastic member away from the magnetic member is fixed in the fixing groove.

4. The electromagnetic brake according to claim 3, wherein the elastic member is provided in plurality, and the fixing grooves are provided in one-to-one correspondence with the elastic member, the fixing grooves being provided around the outer circumference of the through hole.

5. The electromagnetic brake of claim 2, wherein the abutting disc is connected to the seat body through a plurality of connecting bolts, the plurality of connecting bolts are arranged along a circumferential direction of the abutting disc, the magnetic attraction member is provided with a plurality of avoiding grooves, the plurality of avoiding grooves are arranged in one-to-one correspondence with the plurality of connecting bolts, and the avoiding grooves avoid the corresponding connecting bolts.

6. The electromagnetic brake of claim 5, wherein each of the connecting bolts has a guiding sleeve disposed thereon, the guiding sleeve is disposed between the seat body and the abutting disk, and the guiding sleeve is slidably connected to the corresponding avoiding groove.

7. The electromagnetic brake according to any one of claims 1 to 6, characterized in that the outer periphery of the motor shaft is provided with a flange, and the friction plate is provided with a fixing hole for fixing the flange.

8. The electromagnetic brake of claim 7, wherein the flange is a square ring-shaped structure, the flange defines a mounting hole for insertion of the motor shaft, and the fixing hole is a square hole.

9. An electric motor, characterized in that, the electric motor includes the shell and all locates motor shaft, bearing in the shell and the electromagnetic braking ware of any one of claims 1 to 8, electromagnetic braking ware includes the coil base, the coil base is equipped with mounting groove and through-hole that communicate each other, the bearing is fixed in the mounting groove, the motor shaft passes through the through-hole and is fixed in the bearing.

10. The motor of claim 9, further comprising an encoder disposed within the housing, wherein the coil holder is connected to the encoder, wherein an end of the motor shaft extending out of the housing is an extended end, and the encoder is located on a side of the electromagnetic brake away from the extended end.