CN117145891B - Electromagnetic brake of three-phase asynchronous motor - Google Patents

Abstract

The invention relates to the technical field of electromagnetic brakes, and discloses an electromagnetic brake of a three-phase asynchronous motor, which comprises a main body and an electromagnetic mechanism, wherein the electromagnetic mechanism is arranged on the outer wall of the main body, one side of the main body, which is close to an output end, is provided with a mounting mechanism, the electromagnetic brake further comprises a cover mechanism, the cover mechanism is arranged in the mounting mechanism, the cover mechanism comprises an end cover, the end cover is connected in the mounting mechanism through a bolt thread, and the top of the end cover is fixedly connected with a convex cover. According to the invention, the upper brake block and the lower brake block are pushed to be close to the outer wall of the output shaft through the slide shape of the ladder frame, and finally are locked with the brake ring on the outer wall of the output shaft, so that the braking of the output shaft is realized, the mode that the armature iron which is attracted on the electromagnetic device through electromagnetic force to brake is contacted with the output shaft of the main body through the pushing of the spring to brake is replaced, the electromagnetic device is prevented from being kept to operate all the time when the three-phase asynchronous motor normally operates, and the operation power of the three-phase asynchronous motor is reduced.

Description

Electromagnetic brake of three-phase asynchronous motor

Technical Field

The invention relates to the technical field of electromagnetic brakes, in particular to an electromagnetic brake of a three-phase asynchronous motor.

Background

The braking motor is a totally-enclosed self-fan-cooled squirrel-cage three-phase asynchronous motor with an additional disc type DC brake, is formed by adding a DC disc type electromagnetic braking motor between a rear end cover of a Y-series motor and a fan, and is a derivative series of the Y-series motor. Brake motors are widely used in a variety of mechanical devices and transmissions that require quick stopping and accurate positioning. The braking motor meets JB/T6456-1992 standard, and the series of braking motors are widely used in metal processing machine tools, packaging machines, woodworking machines, food machines, chemical machines, textile machines, construction machines, gear reducers and the like.

The output shaft of the motor is braked generally by closing the power supply of the electromagnetic device, so that an armature which is braked on the electromagnetic device through electromagnetic force is attracted to the output shaft of the motor through the pushing of a spring to make the armature contact with the output shaft of the motor for braking, but in the running process of the motor, the electromagnetic device is required to be kept to run all the time, the braked armature is attracted to the electromagnetic device through electromagnetic force, so that the brake armature is separated from the output shaft of the motor to enable the three-phase asynchronous motor to run normally, but in the running process of the motor, the electromagnetic device is required to be additionally driven to run, so that the running power of the three-phase asynchronous motor is increased, and the energy consumption of the three-phase asynchronous motor is overlarge.

Disclosure of Invention

The invention aims to provide an electromagnetic brake of a three-phase asynchronous motor, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to an electromagnetic brake of a three-phase asynchronous motor, which comprises a main body and an electromagnetic mechanism, wherein the electromagnetic mechanism is arranged on the outer wall of the main body, and one side of the main body, which is close to an output end, is provided with a mounting mechanism, and further comprises:

the cover body mechanism is arranged in the mounting mechanism and comprises an end cover, the end cover is connected in the mounting mechanism through a bolt thread, the top of the end cover is fixedly connected with a convex cover, a plurality of mounting holes are formed in the outer wall of the convex cover and are distributed at equal intervals, and thread grooves are formed in the inner wall of each mounting hole;

the brake mechanism is arranged in the end cover and comprises a sliding column, the sliding column is connected with the inner wall of the mounting hole in a sliding way, the rear wall of the sliding column is fixedly connected with an upper brake block, the bottom of the upper brake block is fixedly connected with a lower brake block, and the front surface of the lower brake block is fixedly connected with a ladder frame;

the pushing mechanism is arranged at the bottom of the convex cover and comprises a spring, the spring is fixedly connected at the bottom of the convex cover, the bottom of the spring is fixedly connected with an extrusion block, and the bottom of the extrusion block is rotationally connected with a roller;

the fixing mechanism is arranged inside the mounting hole and comprises a threaded column, the threaded column is in threaded connection with one side of the sliding column, which is far away from the upper brake block, the back of the threaded column is fixedly connected with a limiting plate, one side of the limiting plate, which is far away from the threaded column, is fixedly connected with a telescopic column, and one end of the telescopic column, which is far away from the limiting plate, is fixedly connected with a blocking block.

Further, the main body comprises an output shaft, the output shaft is rotationally connected to the output end of the main body, a mounting groove is formed in one side, adjacent to the output shaft, of the main body, a brake ring is fixedly connected to the outer wall of the output shaft, and the brake ring is arranged corresponding to the upper brake block and the sliding column.

Further, the cover mechanism further comprises shrinkage grooves which are formed in the inner wall of the convex cover, a plurality of shrinkage grooves are formed, the plurality of shrinkage grooves are distributed corresponding to the mounting holes, and the mounting holes penetrate through the shrinkage grooves.

Further, the end cover outer wall fixedly connected with the fixture block, the fixture block has a plurality of, and a plurality of fixture block uses the end cover as central circumference array, and the thread groove has been seted up openly to a plurality of fixture block, and open to protruding lid bottom has a plurality of spring groove, and a plurality of spring groove uses protruding lid as central circumference array, and the one end that the extrusion piece was kept away from to the spring and spring groove top inner wall fixed connection.

Further, the electromagnetic mechanism comprises an electromagnetic frame, the electromagnetic frame is fixedly connected to the outer wall of the main body, close to one position of the installation mechanism, the electromagnetic frame is communicated with the installation groove, an electromagnetic coil is clamped inside the electromagnetic frame, an electromagnetic controller is fixedly connected to the outer wall of the electromagnetic frame, and the electromagnetic controller is electrically connected with the electromagnetic coil.

Further, the braking mechanism further comprises a threaded hole, the threaded hole is formed in the front of the sliding column, the outer wall of the threaded column is in threaded connection with the inner wall of the threaded hole, the trapezoid frame is in a slide shape, a plurality of grooves are formed in one sides, far away from the trapezoid frame, of the upper braking block and the lower braking block, the side, far away from the trapezoid frame, of the upper braking block and the lower braking block is abutted against the outer wall of the braking ring, the outer wall of the upper braking block is embedded with the shrinkage groove, a plurality of braking mechanisms are arranged, and the plurality of braking mechanisms are distributed corresponding to the shrinkage groove.

Further, the mounting mechanism comprises a mounting frame, wherein the mounting frame is fixedly connected to one side, close to the output end, of the main body, a plurality of clamping grooves are formed in the inner wall of the mounting frame, the plurality of clamping grooves are arranged in a circumferential array mode by using the mounting frame as a center, a plurality of clamping blocks are slidably connected with the plurality of clamping grooves, the end cover is inserted into the mounting frame, and a through hole is formed in a position, corresponding to a thread groove formed in the inner wall of each clamping groove, of each clamping groove.

Further, the pushing mechanism further comprises a connecting column, the connecting column is fixedly connected to one end, far away from the roller, of the bottom of the extrusion block, the springs are distributed correspondingly to the spring grooves, the bottom of the connecting column is fixedly connected with an armature ring, and the armature ring and the electromagnetic ring are arranged correspondingly.

Further, the fixed establishment still includes tightening up the spring, tightening up the one side that the spring fixed connection is close to the telescopic column at the sprue, tightening up the one end and limiting plate fixed connection that the sprue was kept away from to the spring, tightening up the spring and distributing at the telescopic column outer wall, the screw thread groove has been seted up to the sprue outer wall, the sprue outer wall has been seted up with mounting hole inner wall threaded connection, and the sprue is kept away from one side of telescopic column and has been seted up the pentagonal groove, fixed establishment has a plurality of, a plurality of fixed establishment and a plurality of mounting hole are for distributing.

The invention has the following beneficial effects:

according to the invention, the output shaft is driven to rotate through the main body, when the output shaft is required to be braked, the electromagnetic controller is used for controlling the electromagnetic coil in the electromagnetic frame to generate electromagnetic force, the electromagnetic force is used for generating attraction force to the armature coil in the end cover, so that the extrusion block is driven to pull downwards through the connecting column, the armature coil slides on the inner wall of the end cover in the process of adsorbing the armature coil and the electromagnetic coil, the connecting column and the extrusion block vertically lift, the spring is driven to stretch in the spring groove, the extrusion block, the idler wheel and the inside of the ladder frame on the outer wall of the lower brake block are enabled to slide, the upper brake block and the lower brake block are pushed to be close to the outer wall of the output shaft through the slide shape of the ladder frame, and finally the armature is locked with the brake ring on the outer wall of the output shaft, thereby realizing braking of the output shaft, the armature is contacted with the output shaft through the pushing of the spring instead of the armature which is braked through electromagnetic force, the running of the electromagnetic motor is always kept in the electromagnetic motor, so that the running power of the three-phase asynchronous motor is reduced, the energy consumption of the three-phase asynchronous motor is required, the armature is increased, the thickness of the contact part of the output shaft is increased, the thickness of the contact part of the output shaft with the brake mechanism is increased, and the armature is prevented from shaking effect is generated when the armature is contacted with the output shaft through the spring through the armature, and the armature is prevented from contacting with the output shaft through the brake effect, and the brake effect is improved.

When the end cover is connected with the main body, the end cover is inserted into the mounting frame, the position of the end cover is fixed through the embedding of the clamping block and the clamping groove, and the device is fixed in the mounting frame through the connection of the bolt passing through the through hole and the thread groove on the surface of the clamping block.

When the device is disassembled and overhauled, the end cover is lifted up by taking down the bolts, so that the end cover is separated from the inside of the mounting frame, the device driving the inside of the end cover is directly taken out of the inside of the mounting frame, the electromagnetic brake can be disassembled independently and is convenient to overhaul and replace, the threaded column is driven to rotate in the threaded hole by rotating the blocking block, the threaded column is separated from the threaded hole, the upper brake block and the lower brake block are pushed inwards, the sliding column is separated from the mounting hole, the upper brake block and the lower brake block are disassembled from the end cover, and maintenance of the upper brake block and the lower brake block is facilitated.

Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.

Drawings

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

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is an overall exploded view of the present invention;

FIG. 3 is a schematic diagram of the main structure of the present invention;

FIG. 4 is a schematic view of a cover mechanism according to the present invention;

FIG. 5 is a schematic view of a brake mechanism according to the present invention;

FIG. 6 is a schematic view of a connecting mechanism according to the present invention;

FIG. 7 is an enlarged view of FIG. 3 at A;

fig. 8 is an enlarged view at B in fig. 4.

In the drawings, the list of components represented by the various numbers is as follows:

in the figure: 1. a main body; 101. an output shaft; 102. a mounting groove; 103. a brake ring; 2. a cover mechanism; 201. an end cap; 202. a protruding cover; 203. a mounting hole; 204. a shrink tank; 205. a clamping block; 206. a spring groove; 3. an electromagnetic mechanism; 301. an electromagnetic frame; 302. an electromagnetic coil; 303. an electromagnetic controller; 4. a braking mechanism; 401. an upper brake block; 402. a spool; 403. a lower brake pad; 404. a ladder-shaped frame; 405. a threaded hole; 5. a mounting mechanism; 501. a mounting frame; 502. a clamping groove; 503. a through hole; 6. a pushing mechanism; 601. a spring; 602. a connecting column; 603. extruding a block; 604. a roller; 605. an armature ring; 7. a fixing mechanism; 701. a threaded column; 702. a limiting plate; 703. a telescopic column; 704. blocking; 705. the spring is tightened.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1: referring to fig. 1-8, the invention discloses an electromagnetic brake of a three-phase asynchronous motor, which comprises a main body 1 and an electromagnetic mechanism 3, wherein the electromagnetic mechanism 3 is arranged on the outer wall of the main body 1, and drives an output shaft 101 to rotate through the main body 1, and further comprises:

the brake mechanism 4 is arranged in the end cover 201, the brake mechanism 4 comprises a slide column 402, the slide column 402 is slidably connected to the inner wall of the mounting hole 203, the rear wall of the slide column 402 is fixedly connected with an upper brake block 401, the bottom of the upper brake block 401 is fixedly connected with a lower brake block 403, and the front face of the lower brake block 403 is fixedly connected with a ladder frame 404;

the pushing mechanism 6 is arranged at the bottom of the convex cover 202, the pushing mechanism 6 comprises a spring 601, the spring 601 is fixedly connected at the bottom of the convex cover 202, an extrusion block 603 is fixedly connected at the bottom of the spring 601, a roller 604 is rotationally connected at the bottom of the extrusion block 603, in the process of adsorbing the armature ring 605 and the electromagnetic ring 302, the armature ring 605 slides on the inner wall of the end cover 201, so that the connecting column 602 and the extrusion block 603 vertically lift, and meanwhile, the spring 601 is driven to stretch in the spring groove 206, so that the extrusion block 603, the roller 604 and the inside of the trapezoid frame 404 on the outer wall of the lower brake block 403 slide;

the main body 1 comprises an output shaft 101, the output shaft 101 is rotationally connected to the output end of the main body 1, a mounting groove 102 is formed in one side, adjacent to the output shaft 101, of the main body 1, a brake ring 103 is fixedly connected to the outer wall of the output shaft 101, the brake ring 103 is arranged corresponding to an upper brake block 401 and a slide column 402, the thickness of the contact part between the output shaft 101 and a brake mechanism 4 is increased through the brake ring 103, and the service life of the output shaft 101 is prolonged;

the electromagnetic mechanism 3 comprises an electromagnetic frame 301, wherein the electromagnetic frame 301 is fixedly connected to one part of the outer wall of the main body 1, which is close to the mounting mechanism 5, the electromagnetic frame 301 is communicated with the mounting groove 102, an electromagnetic coil 302 is clamped in the electromagnetic frame 301, an electromagnetic controller 303 is fixedly connected to the outer wall of the electromagnetic frame 301, the electromagnetic controller 303 is electrically connected with the electromagnetic coil 302, and when the output shaft 101 needs to be braked, the electromagnetic controller 303 controls the electromagnetic coil 302 in the electromagnetic frame 301 to generate electromagnetic force;

the brake mechanism 4 further comprises a threaded hole 405, the threaded hole 405 is formed in the front of the slide column 402, the outer wall of the threaded column 701 is in threaded connection with the inner wall of the threaded hole 405, the trapezoid frame 404 is in a slide shape, one sides of the upper brake block 401 and the lower brake block 403, which are far away from the trapezoid frame 404, are provided with a plurality of grooves, one sides of the upper brake block 401 and the lower brake block 403, which are far away from the trapezoid frame 404, are propped against the outer wall of the brake ring 103, the outer wall of the upper brake block 401 is embedded with the shrinkage groove 204, the brake mechanism 4 is provided with a plurality of brake mechanisms 4, which are distributed corresponding to the shrinkage groove 204, the slide shape of the trapezoid frame 404 pushes the upper brake block 401 and the lower brake block 403 to be close to the outer wall of the output shaft 101, and finally the brake ring 103, which is locked with the outer wall of the output shaft 101, so that the brake of the output shaft 101 is realized;

the pushing mechanism 6 further comprises a connecting column 602, the connecting column 602 is fixedly connected to one end, far away from the roller 604, of the bottom of the extrusion block 603, a plurality of springs 601 are arranged, the plurality of springs 601 are distributed corresponding to the plurality of spring grooves 206, the bottom of the connecting column 602 is fixedly connected with an armature ring 605, the armature ring 605 is arranged corresponding to the electromagnetic ring 302, and attractive force is generated to the armature ring 605 inside the end cover 201 through electromagnetic force, so that the extrusion block 603 is driven to pull downwards through the connecting column 602.

When the electromagnetic braking device is used, the output shaft 101 is driven to rotate through the main body 1, when the output shaft 101 is required to be braked, the electromagnetic controller 303 is used for controlling the electromagnetic coil 302 in the electromagnetic frame 301 to generate electromagnetic force, the electromagnetic force is used for generating attraction force to the armature ring 605 in the end cover 201, thereby the extrusion block 603 is driven to pull downwards through the connecting column 602, in the adsorption process of the armature ring 605 and the electromagnetic coil 302, the armature ring 605 slides on the inner wall of the end cover 201, the connecting column 602 and the extrusion block 603 vertically lift, meanwhile, the spring 601 is driven to stretch in the spring groove 206, the extrusion block 603, the idler wheel 604 and the inside of the trapezoid frame 404 on the outer wall of the lower brake block 403 slide, the upper brake block 401 and the lower brake block 403 are pushed to be close to the outer wall of the output shaft 101 through the slide shape of the trapezoid frame 404, and finally the brake ring 103 on the outer wall of the output shaft 101 is locked, the use time limit of the output shaft 101 is increased through the brake ring 103, the mode of the output shaft 101 is replaced, the brake effect of the armature is prevented from being pushed to be contacted with the output shaft 101, and the brake effect is prevented from shaking due to the fact that the armature is prevented from being generated when the brake armature contacts with the output shaft.

Example 2: referring to fig. 1-8, the electromagnetic brake is shown in fig. 1-8, and further comprises a cover mechanism 2, the cover mechanism 2 is arranged in the installation mechanism 5, the cover mechanism 2 comprises an end cover 201, the end cover 201 is connected in the installation mechanism 5 through bolts, a convex cover 202 is fixedly connected to the top of the end cover 201, a plurality of installation holes 203 are formed in the outer wall of the convex cover 202, the plurality of installation holes 203 are distributed equidistantly, a thread groove is formed in the inner wall of the installation hole 203, when the end cover 201 is connected with the main body 1, the end cover 201 is inserted in the installation frame 501, the position of the end cover 201 is fixed through the embedding of a clamping block 205 and a clamping groove 502, when the device is disassembled and overhauled, the end cover 201 is lifted through removing bolts, so that the end cover 201 is separated from the installation frame 501, and the device in the end cover 201 is driven to be directly taken out of the installation frame 501, and accordingly the electromagnetic brake can be disassembled independently and overhauled conveniently and replaced;

the cover mechanism 2 further comprises a plurality of shrinkage grooves 204, the shrinkage grooves 204 are formed in the inner wall of the convex cover 202, the shrinkage grooves 204 are distributed corresponding to the mounting holes 203, and the mounting holes 203 penetrate through the shrinkage grooves 204;

the outer wall of the end cover 201 is fixedly connected with a plurality of clamping blocks 205, the plurality of clamping blocks 205 take the end cover 201 as a central circumferential array, the front surfaces of the plurality of clamping blocks 205 are provided with thread grooves, the bottom of the convex cover 202 is provided with a plurality of spring grooves 206, the plurality of spring grooves 206 take the convex cover 202 as a central circumferential array, and one end of a spring 601, which is far away from the extrusion block 603, is fixedly connected with the inner wall of the top of the spring groove 206;

the installation mechanism 5 is arranged on one side of the main body 1, which is close to the output end, the installation mechanism 5 comprises a mounting frame 501, the mounting frame 501 is fixedly connected to one side of the main body 1, which is close to the output end, a plurality of clamping grooves 502 are formed in the inner wall of the mounting frame 501, the plurality of clamping grooves 502 are arranged in a circumferential array by taking the mounting frame 501 as the center, a plurality of clamping blocks 205 are in sliding connection with the plurality of clamping grooves 502, the end cover 201 is inserted into the mounting frame 501, a through hole 503 is formed in a position, corresponding to a thread groove formed in the clamping blocks 205, of the inner wall of the clamping groove 502, the through hole 503 is connected with the thread groove on the surface of the clamping block 205 through a bolt, so that the device is fixed in the mounting frame 501, and the device can not fall off instantly even when the bolt loosens, so that the safety of the connection of the electromagnetic brake and the main body 1 is improved;

the fixing mechanism 7 is arranged in the mounting hole 203, the fixing mechanism 7 comprises a threaded column 701, the threaded column 701 is in threaded connection with one side of the sliding column 402, which is far away from the upper brake block 401, a limiting plate 702 is fixedly connected with the back of the threaded column 701, one side of the limiting plate 702, which is far away from the threaded column 701, is fixedly connected with a telescopic column 703, and one end, which is far away from the limiting plate 702, of the telescopic column 703 is fixedly connected with a blocking block 704;

the fixing mechanism 7 further comprises tightening springs 705, the tightening springs 705 are fixedly connected to one side, close to the telescopic columns 703, of the blocking blocks 704, one ends, far away from the blocking blocks 704, of the tightening springs 705 are fixedly connected with limiting plates 702, the tightening springs 705 are distributed on the outer walls of the telescopic columns 703, threaded grooves are formed in the outer walls of the blocking blocks 704, the outer walls of the blocking blocks 704 are in threaded connection with the inner walls of the mounting holes 203, pentagonal grooves are formed in one sides, far away from the telescopic columns 703, of the blocking blocks 704, the fixing mechanism 7 is provided with a plurality of fixing mechanisms 7 and a plurality of mounting holes 203, the threaded columns 701 are driven to rotate in the threaded holes 405 through rotation of the blocking blocks 704, so that the threaded columns 701 are separated from the threaded holes 405, and the upper brake blocks 401 and the lower brake blocks 403 are pushed inwards, so that the sliding columns 402 are separated from the mounting holes 203, and the upper brake blocks 401 and the lower brake blocks 403 are detached from the end covers 201, and maintenance of the upper brake blocks 401 and the lower brake blocks 403 is facilitated.

When the electromagnetic brake is used, when the end cover 201 is connected with the main body 1, the end cover 201 is inserted into the mounting frame 501, the position of the end cover 201 is fixed through the embedding of the clamping block 205 and the clamping groove 502, and the threaded groove on the surface of the clamping block 205 is penetrated through the through hole 503 by the bolt, so that the electromagnetic brake is fixed in the mounting frame 501, the device can not fall off instantly even when the bolt is loosened, so that the safety of the connection of the electromagnetic brake and the main body 1 is improved, when the device is disassembled and overhauled, the end cover 201 is lifted up by taking the bolt, the end cover 201 is separated from the mounting frame 501, the device in the end cover 201 is driven to be directly taken out of the mounting frame 501, so that the electromagnetic brake can be disassembled and replaced independently, and the threaded column 701 is driven to rotate in the threaded hole 405 by the rotation of the blocking block 704, the threaded column 701 is separated from the threaded hole 405, the upper brake block 401 and the lower brake block 403 are pushed inwards, and the slide column 402 is separated from the mounting hole 203, so that the upper brake block 401 and the lower brake block 403 are disassembled from the end cover 201, and the maintenance of the upper brake block 401 and the lower brake block 403 are facilitated.

The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (3)

1. The utility model provides an electromagnetic braking ware of three-phase asynchronous motor, includes main part (1) and electromagnetic mechanism (3), electromagnetic mechanism (3) set up at main part (1) outer wall, one side that main part (1) is close to the output is provided with installation mechanism (5), its characterized in that still includes:

the cover body mechanism (2), the cover body mechanism (2) is arranged in the installation mechanism (5), the cover body mechanism (2) comprises an end cover (201), the end cover (201) is connected in the installation mechanism (5) through a bolt thread, a convex cover (202) is fixedly connected to the top of the end cover (201), a plurality of installation holes (203) are formed in the outer wall of the convex cover (202), a plurality of installation holes (203) are distributed at equal intervals, and thread grooves are formed in the inner wall of the installation holes (203);

the brake mechanism (4), the brake mechanism (4) is arranged inside the end cover (201), the brake mechanism (4) comprises a slide column (402), the slide column (402) is slidably connected to the inner wall of the mounting hole (203), an upper brake block (401) is fixedly connected to the rear wall of the slide column (402), a lower brake block (403) is fixedly connected to the bottom of the upper brake block (401), and a trapezoid frame (404) is fixedly connected to the front surface of the lower brake block (403);

the pushing mechanism (6), the pushing mechanism (6) is arranged at the bottom of the convex cover (202), the pushing mechanism (6) comprises a spring (601), the spring (601) is fixedly connected at the bottom of the convex cover (202), an extrusion block (603) is fixedly connected at the bottom of the spring (601), and a roller (604) is rotatably connected at the bottom of the extrusion block (603);

the fixing mechanism (7), fixing mechanism (7) is arranged inside the mounting hole (203), fixing mechanism (7) comprises a threaded column (701), the threaded column (701) is in threaded connection with one side, far away from the upper brake block (401), of the sliding column (402), a limiting plate (702) is fixedly connected with the back of the threaded column (701), a telescopic column (703) is fixedly connected with one side, far away from the threaded column (701), of the limiting plate (702), and one end, far away from the limiting plate (702), of the telescopic column (703) is fixedly connected with a blocking block (704);

the main body (1) comprises an output shaft (101), the output shaft (101) is rotationally connected to the output end of the main body (1), a mounting groove (102) is formed in one side, adjacent to the output shaft (101), of the main body (1), a brake ring (103) is fixedly connected to the outer wall of the output shaft (101), and the brake ring (103) is correspondingly arranged with an upper brake block (401) and a sliding column (402);

the cover mechanism (2) further comprises shrinkage grooves (204), the shrinkage grooves (204) are formed in the inner wall of the convex cover (202), a plurality of shrinkage grooves (204) are formed, the shrinkage grooves (204) are distributed corresponding to the mounting holes (203), and the mounting holes (203) penetrate through the shrinkage grooves (204);

the outer wall of the end cover (201) is fixedly connected with a plurality of clamping blocks (205), the clamping blocks (205) are in a plurality of circumferential arrays taking the end cover (201) as a center, the front faces of the clamping blocks (205) are provided with threaded grooves, the bottom of the convex cover (202) is provided with a plurality of spring grooves (206), the spring grooves (206) are in a plurality of circumferential arrays taking the convex cover (202) as the center, and one end, far away from the extrusion block (603), of the spring (601) is fixedly connected with the inner wall of the top of the spring groove (206);

the electromagnetic mechanism (3) comprises an electromagnetic frame (301), the electromagnetic frame (301) is fixedly connected to one part, close to the mounting mechanism (5), of the outer wall of the main body (1), the electromagnetic frame (301) is mutually communicated with the mounting groove (102), an electromagnetic ring (302) is clamped inside the electromagnetic frame (301), an electromagnetic controller (303) is fixedly connected to the outer wall of the electromagnetic frame (301), and the electromagnetic controller (303) is electrically connected with the electromagnetic ring (302);

the pushing mechanism (6) further comprises a connecting column (602), the connecting column (602) is fixedly connected to one end, far away from the roller (604), of the bottom of the extrusion block (603), a plurality of springs (601) are arranged, the springs (601) are distributed corresponding to the spring grooves (206), an armature ring (605) is fixedly connected to the bottom of the connecting column (602), and the armature ring (605) is arranged corresponding to the electromagnetic ring (302);

the braking mechanism (4) further comprises a threaded hole (405), the threaded hole (405) is formed in the front of the sliding column (402), the outer wall of the threaded column (701) is in threaded connection with the inner wall of the threaded hole (405), the trapezoid frame (404) is in a slide shape, a plurality of grooves are formed in one sides, far away from the trapezoid frame (404), of the upper braking block (401) and the lower braking block (403), the sides, far away from the trapezoid frame (404), of the upper braking block (401) and the lower braking block (403) are abutted against the outer wall of the braking ring (103), the outer wall of the upper braking block (401) is embedded with the shrinkage groove (204), and the braking mechanisms (4) are distributed correspondingly to the shrinkage groove (204);

in the adsorption process of the armature ring (605) and the electromagnetic coil (302), the armature ring (605) slides on the inner wall of the end cover (201), so that the connecting column (602) and the extrusion block (603) vertically lift, and meanwhile, the spring (601) is driven to stretch in the spring groove (206), so that the extrusion block (603), the roller (604) and the trapezoid frame (404) on the outer wall of the lower brake block (403) slide inside, the upper brake block (401) and the lower brake block (403) are pushed to the outer wall of the output shaft (101) through the slide shape of the trapezoid frame (404), and finally, the connecting column is locked with the brake ring (103) on the outer wall of the output shaft (101), so that the braking of the output shaft (101) is realized.

2. An electromagnetic brake for a three-phase asynchronous motor according to claim 1, characterized in that: the mounting mechanism (5) comprises a mounting frame (501), the mounting frame (501) is fixedly connected to one side, close to the output end, of the main body (1), a plurality of clamping grooves (502) are formed in the inner wall of the mounting frame (501), the clamping grooves (502) are arranged in a circumferential array with the mounting frame (501) as the center, the clamping blocks (205) are slidably connected with the clamping grooves (502), the end cover (201) is inserted into the mounting frame (501), and a through hole (503) is formed in one position, corresponding to a threaded groove formed in the inner wall of the clamping groove (502) and the clamping block (205), in a penetrating mode.

3. An electromagnetic brake for a three-phase asynchronous motor according to claim 2, characterized in that: the fixing mechanism (7) further comprises tightening springs (705), the tightening springs (705) are fixedly connected to one side, close to the telescopic column (703), of the blocking blocks (704), one ends, far away from the blocking blocks (704), of the tightening springs (705) are fixedly connected with limiting plates (702), the tightening springs (705) are distributed on the outer wall of the telescopic column (703), thread grooves are formed in the outer wall of the blocking blocks (704), the outer wall of the blocking blocks (704) is in threaded connection with the inner wall of the mounting hole (203), pentagonal grooves are formed in one side, far away from the telescopic column (703), of the blocking blocks (704), a plurality of fixing mechanisms (7) are distributed relative to the mounting holes (203).