CN214698910U - Axial locking electromagnetic brake - Google Patents
Axial locking electromagnetic brake Download PDFInfo
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- CN214698910U CN214698910U CN202023014190.2U CN202023014190U CN214698910U CN 214698910 U CN214698910 U CN 214698910U CN 202023014190 U CN202023014190 U CN 202023014190U CN 214698910 U CN214698910 U CN 214698910U
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Abstract
The invention relates to the technical field of electromagnetic brakes, in particular to an axial locking electromagnetic brake, which comprises an electromagnetic mechanism, a locking mechanism and a bearing, wherein the electromagnetic mechanism is arranged on the bearing; the electromagnetic mechanism comprises an electromagnetic framework and a coil, and the coil is wound on the electromagnetic framework; the locking mechanism comprises a movable plate, a brake plate and two magnets, the two magnets are fixed at two ends of the brake plate and are positioned between the brake plate and the electromagnetic framework, the two magnets are opposite in polarity during installation and are opposite in magnetic pole polarity at the positions opposite to the electromagnetic framework respectively, and when the coil is powered off, the brake plate is close to the movable plate along the axial direction under the action of magnetic attraction force to form braking; when the coil is electrified, the brake pad is far away from the movable piece along the axial direction, so that the movable piece can normally operate. The invention can realize instant braking by the brake disc approaching the movable disc along the axial direction and clamping when power is off, and repel the brake disc away from the movable disc along the axial direction when power is on, thereby realizing unlocking movement of the movable disc.
Description
Technical Field
The invention relates to the technical field of electromagnetic brakes, which are used for self-locking of a transmission mechanism of a micro-miniature motor.
Background
The conventional electromagnetic brake is a friction type brake structure which is separated from the brake when being electrified and braked when being not electrified. The brake has the advantages of compact structure, convenient installation, wide adaptability and the like. However, after the brake is operated for a long time, the restoring spring in the structure of the brake can be loosened or locked.
The conventional brake applies band-type braking to a rotating object through a friction plate. The friction plate can be worn and failed along with the lapse of time, so that the braking torque is reduced, the braking effect is influenced, the phenomenon of braking failure is easy to occur, and the adjustment can be carried out only after the failure of the braking mechanism is found. The application number is 201611253700.7's chinese utility model patent, through providing one kind and have self-locking function electromagnetic braking ware, can realize the auto-lock when the outage, improve electromagnetic braking's braking effect, its shortcoming still relies on spring unit to support in its structure and presses the brake disc to reach braking effect through frictional force, is difficult to in time brake when inertia is great, and the project organization is loaded down with trivial details.
Disclosure of Invention
The invention aims to provide an axial locking electromagnetic brake which is simple in structure, capable of instantly braking, saving cost, flexible in braking and reliable in operation.
An axial locking electromagnetic brake comprises an electromagnetic mechanism, a locking mechanism and a bearing; the electromagnetic mechanism comprises an electromagnetic framework and a coil, and the coil is wound on the electromagnetic framework; the locking mechanism comprises a movable plate, a brake plate and two magnets, the two magnets are fixed at two ends of the brake plate and are positioned between the brake plate and the electromagnetic framework, the two magnets are opposite in polarity during installation and are opposite in magnetic pole polarity at positions opposite to the electromagnetic framework respectively, and when the coil is de-energized, the brake plate is close to the movable plate along the axial direction under the action of magnetic attraction of the two magnets, so that the brake plate clamps the movable plate to form braking; when the coil is electrified, the magnetic poles of the electromagnetic framework facing one surface of the brake pad are respectively the same as the polarities of the two opposite magnets, the brake pad is far away from the moving plate along the axial direction, the moving plate operates normally, and the moving plate and a motor shaft move synchronously. The electromagnetic mechanism and the brake pieces with the magnets with different magnetic pole directions at two ends form a group of locking mechanisms moving axially; the axial locking electromagnetic brake drives the brake piece to be attracted with the electromagnetic mechanism by two magnets in different magnetic pole directions under the power-off state, so that the function of locking the brake piece to rotate is realized; when the electromagnetic brake is electrified, the direction of a coil magnetic field is opposite to that of the magnet, and the repulsion brake disc resets along the axial direction, so that the unlocking movement of the brake disc is realized.
Optionally, the axial locking electromagnetic brake mechanism does not contain any spring component, and the mechanism is reset without depending on the elastic force of the spring component.
Optionally, the axial locking electromagnetic brake mechanism is in a self-locking mode of power-off locking and power-on unlocking; the locking mode is axial clamping, and the locking of the moving plate is realized, rather than radial rotating friction braking.
Optionally, the moving plate is a butterfly-shaped plate, and a groove corresponding to the moving plate is formed in an end face of the brake plate. The brake action of the brake pad on the moving pad is that when the coil of the electromagnetic mechanism is powered off, the magnetic attraction force of the magnet is acted on the brake pad and is clamped close to the moving pad to realize braking.
Optionally, 4 guide pillars are disposed at a lower end of an electromagnetic skeleton of the electromagnetic mechanism, and are used to fix the electromagnetic skeleton to the bottom plate and limit a motion trajectory of the brake pad.
The invention has the beneficial effects that: according to the invention, through the electromagnetic mechanism, when the coil is electrified, the magnetic poles of the magnet and the magnetic poles of the electromagnetic mechanism have the same polarity and are mutually repelled, so that the brake piece is far away from the moving piece, and the normal operation of the moving piece is not influenced; when the coil loses power, the magnetic attraction of the magnet is applied to the brake pad, the brake pad is close to the brake pad and clamped, instantaneous braking is realized, and safety accidents caused by failure of the spring or incapability of effectively braking due to overlarge friction force of inertia are prevented.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram according to an embodiment of the present invention.
Fig. 2 is a perspective view of the locking mechanism in an embodiment of the present invention.
Fig. 3 is a schematic perspective view of an embodiment of the present invention.
In the figure: 1. a base plate; 2. a housing; 3. an electromagnetic mechanism; 31. an electromagnetic framework; 32. a coil; 4. a locking mechanism; 41. a moving plate; 42. a brake pad; 43. two magnets; 5. a bearing; 6. and (6) a guide pillar.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following specific examples are merely illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1, fig. 2 and fig. 3, an embodiment of the present invention provides an axial locking electromagnetic brake, which includes an electromagnetic mechanism 3, a locking mechanism 4, a bearing 5 and a guide post 6; the electromagnetic mechanism 3 comprises an electromagnetic framework 31 and a coil 32, and the coil 32 is wound on the electromagnetic framework 31; the locking mechanism 4 comprises a moving plate 41, a brake plate 42 and two magnets 43, the two magnets 43 are fixed at two ends of the brake plate 42 and are positioned between the brake plate 42 and the electromagnetic framework 31, the polarities of the two magnets 43 are opposite when the locking mechanism is installed, and the polarities of the partial magnetic poles of the two magnets are opposite to the polarities of the partial magnetic poles at the position of the electromagnetic framework 31 opposite to each other, when the coil 32 is de-energized, the brake plate 42 is close to the moving plate 41 along the axial direction under the action of the magnetic attraction force of the two magnets 43, so that the brake plate 42 is clamped with the moving plate 41 to form braking; when the coil 32 is energized, the magnetic poles of the electromagnetic frame 31 facing one surface of the brake pad 42 have the same polarity as the polarities of the two magnets 43, the brake pad 42 is far away from the moving plate 41 according to the principle that like poles repel each other, the moving plate 41 normally operates, and the moving plate 41 and a motor shaft synchronously move.
In the embodiment, a set of locking mechanism 4 moving axially is composed of the electromagnetic mechanism 3 and the brake piece 42 with the magnets 43 with different magnetic pole directions at two ends; the axial locking electromagnetic brake drives the brake piece to be attracted with the electromagnetic mechanism by two magnets in different magnetic pole directions under the power-off state, so that the function of locking the brake piece to rotate is realized; when the electromagnetic brake is electrified, the direction of a coil magnetic field is opposite to that of the magnet, and the repulsion brake disc resets along the axial direction, so that the unlocking movement of the brake disc is realized.
As shown in fig. 2, in the present embodiment, the rotor 41 is a butterfly rotor, and a groove corresponding to the rotor 41 is provided on an end surface of the brake pad 42. The braking action of the brake plate 42 on the moving plate 41 is realized by that when the coil 32 of the electromagnetic mechanism 3 is de-energized, the magnetic attraction force of the magnet 43 acts on the brake plate 42 and is clamped close to the moving plate 41 to realize braking.
As shown in the problem 3, in the present embodiment, 4 guide posts 6 are provided at the lower end of the electromagnetic frame 31 of the electromagnetic mechanism 3, and are used for fixing the electromagnetic frame 31 to the bottom plate 1 and limiting the motion track of the brake pad 42.
Claims (5)
1. An axial locking electromagnetic brake is characterized by comprising an electromagnetic mechanism, a locking mechanism and a bearing; the electromagnetic mechanism comprises an electromagnetic framework and a coil, and the coil is wound on the electromagnetic framework; the locking mechanism comprises a movable plate, a brake plate and two magnets, the two magnets are fixed at two ends of the brake plate and are positioned between the brake plate and the electromagnetic framework, the two magnets are opposite in polarity during installation and are opposite in magnetic pole polarity at positions opposite to the electromagnetic framework respectively, and when the coil is de-energized, the brake plate is close to the movable plate along the axial direction under the action of magnetic attraction of the two magnets, so that the brake plate clamps the movable plate to form braking; when the coil is electrified, the magnetic pole polarity of one surface, facing the brake pad, of the electromagnetic framework is respectively the same as the polarities of the two opposite magnets, the brake pad is far away from the moving plate along the axial direction, the moving plate normally operates, and the moving plate and a motor shaft synchronously move; the electromagnetic mechanism and the brake pieces with the magnets with different magnetic pole directions at two ends form a group of locking mechanisms moving axially; the axial locking electromagnetic brake drives the brake piece to be attracted with the electromagnetic mechanism by two magnets in different magnetic pole directions under the power-off state, so that the function of locking the brake piece to rotate is realized; when the electromagnetic brake is electrified, the direction of a coil magnetic field is opposite to that of the magnet, and the repulsion brake disc resets along the axial direction, so that the unlocking movement of the brake disc is realized.
2. The axial locking electromagnetic brake of claim 1, wherein the axial locking electromagnetic brake mechanism does not include any spring member, and the mechanism is reset without relying on the elastic force of the spring member.
3. The axial locking electromagnetic brake of claim 1, wherein the axial locking electromagnetic brake mechanism is self-locking in the form of a power-off lock, which is unlocked by power-on; the locking mode is axial clamping, and the locking of the moving plate is realized, rather than radial rotating friction braking.
4. The axial locking electromagnetic brake of claim 1, wherein the rotor is a butterfly rotor, and grooves corresponding to the rotor are formed on the end surface of the brake pad; the brake action of the brake pad on the moving pad is that when the coil of the electromagnetic mechanism is powered off, the magnetic attraction force of the magnet is acted on the brake pad and is clamped close to the moving pad to realize braking.
5. The axial locking electromagnetic brake of claim 1, wherein 4 guide posts are provided at a lower end of the electromagnetic frame of the electromagnetic mechanism for fixing the electromagnetic frame to the bottom plate and limiting a motion locus of the brake pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023014190.2U CN214698910U (en) | 2020-12-15 | 2020-12-15 | Axial locking electromagnetic brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023014190.2U CN214698910U (en) | 2020-12-15 | 2020-12-15 | Axial locking electromagnetic brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214698910U true CN214698910U (en) | 2021-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023014190.2U Active CN214698910U (en) | 2020-12-15 | 2020-12-15 | Axial locking electromagnetic brake |
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| CN (1) | CN214698910U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114664597A (en) * | 2021-12-24 | 2022-06-24 | 平高集团有限公司 | Motor power-off locking device of motor operating mechanism and circuit breaker |
| CN115217867A (en) * | 2022-07-15 | 2022-10-21 | 奇瑞汽车股份有限公司 | Brake caliper for vehicle, return method, and storage medium |
| CN114664597B (en) * | 2021-12-24 | 2024-05-17 | 平高集团有限公司 | Motor power failure locking device of motor operating mechanism and circuit breaker |
-
2020
- 2020-12-15 CN CN202023014190.2U patent/CN214698910U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114664597A (en) * | 2021-12-24 | 2022-06-24 | 平高集团有限公司 | Motor power-off locking device of motor operating mechanism and circuit breaker |
| CN114664597B (en) * | 2021-12-24 | 2024-05-17 | 平高集团有限公司 | Motor power failure locking device of motor operating mechanism and circuit breaker |
| CN115217867A (en) * | 2022-07-15 | 2022-10-21 | 奇瑞汽车股份有限公司 | Brake caliper for vehicle, return method, and storage medium |
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