CN116771823A - Small-size large-torque permanent magnet brake - Google Patents
Small-size large-torque permanent magnet brake Download PDFInfo
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- CN116771823A CN116771823A CN202311086948.9A CN202311086948A CN116771823A CN 116771823 A CN116771823 A CN 116771823A CN 202311086948 A CN202311086948 A CN 202311086948A CN 116771823 A CN116771823 A CN 116771823A
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Abstract
The application discloses a small-size large-torque permanent magnet brake, which belongs to the technical field of production of permanent magnet brakes and comprises a rotor, a stator, armatures, springs, coils, permanent magnets and annular conductive magnetic plates, wherein the coils are arranged in the stator, the armatures are provided with a plurality of armature circular arc through holes, the magnetic plates are provided with a plurality of magnetic plate circular arc through holes, one side surface of each magnetic plate is in contact with one side surface of each armature, the armature circular arc through holes and the magnetic plate circular arc through holes are respectively positioned in the circumferential direction of virtual circles with different diameters and are arranged at intervals inside and outside, and gaps are reserved between the adjacent armature circular arc through holes and the magnetic plate circular arc through holes. The application can realize the purposes of increasing the number of the magnetic loops and increasing the length of the magnetic loops, and finally realize the purposes of increasing the magnetic force and the torque; meanwhile, the armature mass is reduced, so that the rotational inertia of the rotor is reduced, the braking effect is improved, and the braking requirement of small volume and large torque can be met.
Description
Technical Field
The application belongs to the technical field of production of permanent magnet brakes, and particularly relates to a small-size large-torque permanent magnet brake.
Background
The permanent magnet brake is a brake which realizes a braking function by utilizing the magnetic force generated by the permanent magnet to the armature, and can change the braking torque by changing the position and the size of the permanent magnet, thereby solving the problems of residual torque and noise of the traditional spring-loaded brake and being widely applied in the robot industry and the like at present.
The basic structure of the permanent magnet brake comprises a rotor, a stator, an armature, a spring, a coil and a permanent magnet, wherein the armature is connected with the rotor, the coil is arranged in the stator, and the basic working principle is as follows: when the coil is disconnected from the power supply, the magnetic force of the permanent magnet attracts the armature to move in the direction overcoming the elastic force of the spring, the armature contacts one end of the stator or a friction plate arranged on the stator to generate friction, the armature and the rotor cannot rotate due to the friction force, and the brake is in a braking state; when the coil is connected with a power supply, an electromagnetic field generated by the coil, namely an electromagnet, generates repulsive force on the armature, the repulsive force and the attractive force of the permanent magnet on the armature are mutually offset, the armature is separated from one end of the stator or a friction plate arranged on the stator under the action of the elastic force of the spring, the armature and the rotor can freely rotate, and the brake is in a brake release state.
In practical application, the specific structure of the permanent magnet brake can also be changed in various ways, for example, one end of the rotor is connected with the cover plate, the cover plate is connected with the armature, or one end of the rotor is provided with an integrally formed rotary disc, the rotary disc is connected with the armature, and the springs are spiral compression springs, spiral tension springs or leaf springs, etc., and the specific structures are determined according to practical needs.
However, the conventional permanent magnet brake with any specific structure has the following defects: the magnetic circuit (comprising the magnetic circuit of the permanent magnet and the magnetic circuit of the electromagnet) directly passes through the armature, the magnetic circuit is single and the distance is short, so that the magnetic force and the torque are not large enough, if the torque is to be increased, only the position or the size of the permanent magnet is changed, and the size of the brake is necessarily increased; meanwhile, the armature is of a solid structure except for a necessary central through hole and other connecting holes (the solid structure is one of the necessary conditions for meeting the traditional magnetic circuit), so that the weight is large, the rotational inertia of the rotor is large, and the braking requirement can be met only by larger torque during braking. In summary, the conventional permanent magnet brake is difficult to meet the braking requirement of small volume and large torque, such as the requirements of pushing robots, machine tool industries and the like of industry 4.0 on the brake are higher and higher, the requirements on the small volume and large torque permanent magnet brake are stronger and stronger, the brake is required to normally brake at the rotating speed of 10000r/min, and the conventional permanent magnet brake is difficult to meet the requirements.
To facilitate an understanding of the structure of a conventional permanent magnet brake, two typical conventional structures of a permanent magnet brake are described below:
as shown in fig. 1, a transverse permanent magnet brake is provided, wherein one end of a rotor 8 is provided with an integrally formed and annular rotary disc (not labeled in the figure), an annular conventional armature 4 is mounted on the rotary disc through a leaf spring 3, a stator comprises an annular conventional inner groove disc 7 and an annular conventional outer groove disc 1, a coil 5 is mounted between the conventional inner groove disc 7 and the conventional outer groove disc 1, an annular first permanent magnet 6 is mounted between the conventional inner groove disc 7 and the conventional outer groove disc 1 through a retainer 2, and the coil 5 is positioned between the first permanent magnet 6 and the conventional armature 4. The working principle is as follows: when the coil 5 is disconnected, the magnetic force of the first permanent magnet 6 attracts the traditional armature 4 to move towards the direction approaching the coil 5 against the tensile force of the leaf spring 3, the magnetic loop of the first permanent magnet 6 is shown by an arrow loop in fig. 2, a closed loop is formed by the first permanent magnet 6, the traditional inner groove disk 7, the traditional armature 4 and the traditional outer groove disk 1, the attraction force generated by the magnetic loop makes the traditional armature 4 contact with the corresponding end surfaces of the traditional inner groove disk 7 and the traditional outer groove disk 1 to generate friction, and the friction force makes the traditional armature 4 and the rotor 8 unable to rotate, so that the brake is in a braking state; when the coil 5 is powered on, the electromagnetic field generated by the coil 5, namely the electromagnet, generates repulsive force to the traditional armature 4, the repulsive force and the attractive force of the first permanent magnet 6 to the traditional armature 4 are mutually offset, the traditional armature 4 is separated from the corresponding end faces of the traditional inner groove disc 7 and the traditional outer groove disc 1 under the action of the tensile force of the leaf spring 3, the traditional armature 4 and the rotor 8 can freely rotate, and the brake is in a brake release state.
As shown in fig. 3, a longitudinally-placed permanent magnet brake is provided, at one end of a rotor 8, with an integrally formed and annular rotary disc (not labeled in the figure), on which an annular conventional armature 4 is mounted by a leaf spring 3, the stator comprising an annular conventional slotted disc 10 and an annular mounting plate 12, a coil 5 being mounted in the conventional slotted disc 10, and an annular second permanent magnet 11 being mounted between the conventional slotted disc 10 and the mounting plate 12 between the coil 5 and the conventional armature 4. The working principle is as follows: when the coil 5 is disconnected from the power supply, the magnetic force of the second permanent magnet 11 attracts the traditional armature 4 to move towards the direction approaching to the coil 5 against the tensile force of the leaf spring 3, the attractive force generated by the second permanent magnet 11 causes friction between the traditional armature 4 and the corresponding end surfaces of the traditional slot disc 10 and the mounting plate 12, the friction force causes the traditional armature 4 and the rotor 8 not to rotate, and the brake is in a braking state; when the coil 5 is powered on, the electromagnetic field generated by the coil 5, namely the electromagnet, generates repulsive force to the traditional armature 4, the repulsive force and the attractive force of the second permanent magnet 11 to the traditional armature 4 are mutually offset, the traditional armature 4 is separated from the corresponding end surfaces of the traditional slot disc 10 and the mounting plate 12 under the action of the tensile force of the leaf spring 3, the traditional armature 4 and the rotor 8 can freely rotate, and the brake is in a brake release state.
The traditional transverse permanent magnet brake and the longitudinal permanent magnet brake have the defects of the traditional permanent magnet brake, and the application requirements of small volume and large torque are difficult to meet.
Disclosure of Invention
The application aims to solve the problems and provide a small-size large-torque permanent magnet brake.
The application realizes the above purpose through the following technical scheme:
the small-volume high-torque permanent magnet brake comprises a rotor, a stator, an armature, a spring, a coil and a permanent magnet, wherein the coil is arranged in the stator, the annular armature is connected with the rotor and is enabled to have elastic force far away from the stator through the spring, the magnetic force of the permanent magnet enables the armature to be close to the stator, a plurality of armature circular arc through holes which are arranged at intervals in the circumferential direction of one virtual circle or the circumferential directions of a plurality of virtual circles which are arranged inside and outside are arranged on the armature, a magnetic conducting plate is arranged at the center of the magnetic conducting plate, a plurality of magnetic conducting plate central through holes are arranged at intervals in the circumferential direction of one virtual circle or the circumferential direction of the plurality of virtual circles which are arranged inside and outside are arranged on the magnetic conducting plate, one side surface of the magnetic conducting plate is contacted with one side surface of the armature, and the magnetic conducting plate are arranged at the positions of the magnetic conducting plate are in the circular arc through holes which satisfy the following condition: after being projected on the same virtual plane parallel to the plane of the armature, the armature circular-arc through holes and the magnetic conductive plate circular-arc through holes are respectively positioned in the circumferential directions of virtual circles with different diameters and are arranged at intervals inside and outside, and gaps are reserved between the adjacent armature circular-arc through holes and the magnetic conductive plate circular-arc through holes.
Preferably, in order to realize a more reliable transmission structure and a smaller volume, one end of the rotor is provided with an integrally formed rotary disc, the spring is a leaf spring, the armature is connected with the rotary disc through the leaf spring, and the magnetic conduction plate is arranged on the stator and is positioned between the coil and the armature.
Preferably, in order to increase torque and achieve smaller volume, the plurality of armature circular arc through holes are arranged at intervals in the circumferential direction of one virtual circle, the plurality of magnetic conductive plate circular arc through holes are respectively arranged at intervals in the circumferential direction of two virtual circles, and the armature circular arc through holes are positioned between the two magnetic conductive plate circular arc through holes which are arranged inside and outside.
Specifically, the stator includes annular inside groove dish and annular outside groove dish, the coil is installed inside groove dish with between the outside groove dish, the permanent magnet is annular first permanent magnet, the armature is first armature, armature convex through-hole is first armature convex through-hole, the magnetic conduction board is first magnetic conduction board, magnetic conduction board convex through-hole is first magnetic conduction board convex through-hole, first permanent magnet passes through the holder and installs inside groove dish with between the outside groove dish and the coil is located between first permanent magnet and the first armature, first magnetic conduction board is installed inside groove dish with between the outside groove dish and first magnetic conduction board is located between the coil with first armature, first magnetic conduction board with inside groove dish passes through the screw connection. This construction forms an improved transverse permanent magnet brake.
Or the stator is a first annular groove disc, the coil is arranged in the first groove disc, the permanent magnet is a second annular permanent magnet, the armature is a second armature, the armature circular arc through hole is a second armature circular arc through hole, the magnetic conduction plate is a second magnetic conduction plate, the magnetic conduction plate circular arc through hole is a second magnetic conduction plate circular arc through hole, the second permanent magnet is arranged between the first groove disc and the second magnetic conduction plate and is positioned between the coil and the second armature, the second magnetic conduction plate is arranged on the first groove disc and is positioned between the coil and the second armature, and the second magnetic conduction plate is connected with the first groove disc through screws. This construction forms an improved longitudinal permanent magnet brake.
Or the stator is a circular second slot disc, the coil is arranged in the second slot disc, the permanent magnet is a third permanent magnet, the armature is a third armature, the circular arc through hole of the armature is a circular arc through hole of the third armature, the magnetic conduction plate is a third magnetic conduction plate, the circular arc through hole of the magnetic conduction plate is a circular arc through hole of the third magnetic conduction plate, the third permanent magnet is arranged in the third armature, the third magnetic conduction plate is arranged on the second slot disc and is positioned between the coil and the third armature, and the third magnetic conduction plate is connected with the second slot disc through a screw. This construction forms an improved permanent magnet brake with permanent magnets disposed in the armature.
The application has the beneficial effects that:
according to the application, the plurality of armature circular arc through holes are arranged on the armature at intervals in the circumferential direction, the magnetic conducting plate is added, the plurality of magnetic conducting plate circular arc through holes are arranged on the magnetic conducting plate at intervals in the circumferential direction, the armature circular arc through holes and the magnetic conducting plate circular arc through holes are respectively positioned in the circumferential direction of virtual circles with different diameters, and the armature circular arc through holes and the magnetic conducting plate circular arc through holes are mutually arranged at intervals inside and outside and leave gaps, so that the structural improvement has the following advantages: when passing through the armatures and the magnetic conduction plates, the magnetic loops are divided into a plurality of magnetic loops, a small part of the magnetic loops pass through the channels between the adjacent armature circular-arc through holes, in addition, a small part of the magnetic loops pass through the channels between the adjacent magnetic conduction plate circular-arc through holes, and a large part of the magnetic loops pass through the magnetic conduction channels between the adjacent armature circular-arc through holes and the magnetic conduction plate circular-arc through holes, so that the purposes of increasing the number of the magnetic loops and the length of the magnetic loops are realized, and finally, the purposes of increasing the magnetic force and the torque are realized, and according to a test, the braking torque can be increased by 20% -30% at most; meanwhile, the armature forms a hollowed-out structure, so that the armature mass is reduced, the rotational inertia of the rotor is reduced, and the braking effect is improved; in addition, since the added magnetic conductive plate is installed on the stator and positioned between the armature and the coil, the idle space of the conventional permanent magnet brake is utilized, so that the whole size is not increased. In summary, the application can meet the braking requirement of small volume and large torque, such as realizing normal braking at the rotating speed of 10000 r/min; and the braking gap of the armature (namely the gap between the armature and the corresponding friction part) can be increased from the traditional 0.2-0.5 mm to 0.2-0.6 mm, so that the service lives of the armature and the brake can be prolonged.
Drawings
FIG. 1 is a front cross-sectional view of a conventional transverse permanent magnet brake;
FIG. 2 is a schematic diagram of a magnetic circuit created by a permanent magnet in a front cross-sectional view of a conventional transverse permanent magnet brake;
FIG. 3 is a front cross-sectional view of a conventional longitudinal permanent magnet brake;
FIG. 4 is a front cross-sectional view of the small-volume high-torque permanent magnet brake of the present application of example 1;
FIG. 5 is a schematic top view of the armature of the low volume high torque permanent magnet brake of example 1, to a scale less than FIG. 4;
FIG. 6 is a schematic top view of the magnetic conductive plate of the small-volume high-torque permanent magnetic brake of example 1, which is smaller than FIG. 4;
FIG. 7 is a schematic diagram of the magnetic circuit created by the transverse permanent magnets in a front cross-sectional view of the small-volume high-torque permanent magnet brake of the present application in example 1;
FIG. 8 is a front cross-sectional view of the small-volume high-torque permanent magnet brake of the present application of example 2;
fig. 9 is a front cross-sectional view of the small-volume high-torque permanent magnet brake according to the present application in example 3.
In the figure, 1-traditional outer slot disc, 2-retainer, 3-leaf spring, 4-traditional armature, 5-coil, 6-first permanent magnet, 7-traditional inner slot disc, 8-rotor, 9-felt, 10-traditional slot disc, 11-second permanent magnet, 12-mounting plate, 13-outer slot disc, 14-first armature circular arc through hole, 15-first magnetic conduction plate, 16-first armature, 17-first magnetic conduction plate circular arc through hole, 18-inner slot disc, 19-connecting through hole, 20-center through hole, 21-connecting screw hole, 22-magnetic conduction plate connecting through hole, 23-magnetic conduction plate center through hole, 24-first slot disc, 25-second armature circular arc through hole, 26-second armature, 27-second magnetic conduction plate circular arc through hole, 28-second magnetic conduction plate, 29-second slot disc, 30-third permanent magnet, 31-third magnetic conduction plate, 32-third magnetic conduction plate circular arc through hole, 33-third armature, 34-third armature circular arc through hole.
Detailed Description
The application is further described below with reference to the accompanying drawings:
as shown in fig. 4-9, the small-volume high-torque permanent magnet brake of the present application comprises a rotor 8, a stator, an armature, a spring, a coil 5, a permanent magnet and a circular ring-shaped conductive plate, wherein the coil 5 is installed in the stator, the circular ring-shaped armature is connected with the rotor 8 and has an elastic force far away from the stator through the spring, the magnetic force of the permanent magnet makes the armature approach the stator, a plurality of armature circular arc through holes which are arranged at intervals in the circumferential direction of a virtual circle or the circumferential direction of a plurality of virtual circles which are arranged inside and outside are arranged on the armature, a plurality of magnetic plate circular through holes which are arranged at intervals in the circumferential direction of the virtual circle or the circumferential direction of the virtual circle which is arranged inside and outside are arranged on the magnetic plate are arranged at the position between the central through holes of the magnetic plate and the peripheral edge, one side surface of the circular arc through holes and one side surface of the armature are contacted with each other, and the position of the circular arc through holes and the circular arc through holes are in the following condition: after being projected on the same virtual plane parallel to the plane of the armature, the armature circular-arc through holes and the magnetic conductive plate circular-arc through holes are respectively positioned in the circumferential directions of virtual circles with different diameters and are arranged at intervals inside and outside, and gaps are reserved between the adjacent armature circular-arc through holes and the magnetic conductive plate circular-arc through holes.
Preferably, in order to realize a more reliable transmission structure and smaller volume, one end of the rotor 8 is provided with an integrally formed rotary table (not separately marked in the figure), the spring is a leaf spring 3, the armature is connected with the rotary table through the leaf spring 3, and the magnetic conduction plate is arranged on the stator and is positioned between the coil 5 and the armature; in order to increase torque and realize smaller volume, a plurality of (3 in the figure) armature circular arc through holes are arranged at intervals in the circumferential direction of one virtual circle, a plurality of (6 in the figure, 3 in each virtual circle) magnetic plate circular arc through holes are respectively arranged at intervals in the circumferential direction of two virtual circles, and the armature circular arc through holes are positioned between the two magnetic plate circular arc through holes which are arranged inside and outside.
Since the permanent magnet brake relates to various specific structures, which cannot be listed one by one in the present application, two typical permanent magnet brake modifications and one atypical permanent magnet brake modification will be specifically described below in three embodiments.
Example 1: as shown in fig. 4-7, on the basis of the above structure, the stator includes a circular inner slot disc 18 and a circular outer slot disc 13, the coil 5 is installed between the inner slot disc 18 and the outer slot disc 13, the permanent magnet is a circular first permanent magnet 6, the armature is a first armature 16, a central through hole 20 is provided at the central position of the first armature 16, the circular arc through hole of the armature is a first circular arc through hole 14, the magnetic plate is a first magnetic plate 15, a central through hole 23 of the magnetic plate is provided at the central position of the first magnetic plate 15, the circular arc through hole of the magnetic plate is a first circular arc through hole 17, the first permanent magnet 6 is installed between the inner slot disc 18 and the outer slot disc 13 through the cage 2 and the coil 5 is located between the first permanent magnet 6 and the first armature 16, the first magnetic plate 15 is installed between the inner slot disc 18 and the outer slot disc 13 and the first magnetic plate 15 is located between the coil 5 and the first armature 16, and the first magnetic plate 15 is connected with the inner slot disc 18 through screws. This construction forms an improved transverse permanent magnet brake.
Compared with the traditional transverse permanent magnet brake, the permanent magnet brake of the embodiment is mainly improved aiming at the traditional armature 4, meanwhile, for distinguishing from other later embodiments, the part name and the number of marks of the first armature 16 are adopted after improvement, meanwhile, the magnetic conduction plate is added, for distinguishing from other later embodiments, the part name and the number of marks of the first magnetic conduction plate 15 are adopted, meanwhile, the adaptability of the traditional outer groove disk 1 and the traditional inner groove disk 7 is required to be improved, and the two part names and the number of marks of the outer groove disk 13 and the inner groove disk 18 are adopted; since the cage 2, the leaf springs 3, the coils 5, the first permanent magnets 6 and the rotor 8 are not modified, the same component names and reference numerals are used.
Fig. 5 also shows a connection through hole 19 and a connection screw hole 21 provided on the first armature 16 for connection with the leaf spring 3, and fig. 6 also shows a magnetic plate connection through hole 22 provided on the first magnetic plate 15 for connection with the inner disc 18.
As shown in fig. 4 to 7, the working principle of the permanent magnet brake of the present embodiment is: when the coil 5 is disconnected, the magnetic force of the first permanent magnet 6 attracts the first armature 16 to move towards the coil 5 against the pulling force of the leaf spring 3, the magnetic circuit of the first permanent magnet 6 forms a closed circuit through the first permanent magnet 6, the inner groove disc 18, the first magnetic conduction plate 15, the first armature 16, the contact surface between the first magnetic conduction plate 15 and the first armature 16 and the outer groove disc 13, and the attractive force generated by the magnetic circuit causes the first armature 16 to contact with the corresponding end surfaces of the outer groove disc 13 and the first magnetic conduction plate 15 to generate friction, and the friction force causes the first armature 16 and the rotor 8 to be unable to rotate, so that the brake is in a braking state; when the coil 5 is powered on, the electromagnetic field generated by the coil 5, namely the electromagnet, generates repulsive force to the first armature 16, the repulsive force and the attractive force of the first permanent magnet 6 to the first armature 16 are offset, the first armature 16 is separated from the corresponding end surfaces of the outer groove disc 13 and the first magnetic conduction plate 15 under the action of the tensile force of the leaf spring 3, the first armature 16 and the rotor 8 can freely rotate, and the brake is in a brake release state.
Example 2: the differences of this example compared to example 1 are: the stator is a first annular trough plate 24, the coil 5 is arranged in the first trough plate 24, the permanent magnet is a second annular permanent magnet 11, the armature is a second armature 26, the armature circular arc through hole is a second armature circular arc through hole 25, the magnetic conduction plate is a second magnetic conduction plate 28, the magnetic conduction plate circular arc through hole is a second magnetic conduction plate circular arc through hole 27, the second permanent magnet 11 is arranged between the first trough plate 24 and the second magnetic conduction plate 28, the second permanent magnet 11 is arranged between the coil 5 and the second armature 26, the second magnetic conduction plate 28 is arranged on the first trough plate 24, the second magnetic conduction plate 28 is arranged between the coil 5 and the second armature 26, and the second magnetic conduction plate 28 is connected with the first trough plate 24 through screws. This construction forms an improved longitudinal permanent magnet brake.
Compared with the traditional longitudinal permanent magnet brake, the permanent magnet brake of the embodiment is mainly improved aiming at the traditional armature 4, meanwhile, the part name and the number of marks of the second armature 26 are adopted after improvement for distinguishing the permanent magnet brake from other embodiments, meanwhile, the part name and the number of marks of the second magnetic conduction plate 28 are adopted for distinguishing the permanent magnet brake from other embodiments, meanwhile, the adaptability of the traditional trough plate 10 is required to be improved, and meanwhile, the part name and the number of marks of the first trough plate 24 are adopted for distinguishing the permanent magnet brake from other embodiments; since the leaf spring 3, the coil 5, the second permanent magnet 11 and the rotor 8 are not modified, the same part names and reference numerals are used; meanwhile, the conventional mounting plate 12 is replaced with a second magnetically permeable plate 28.
As shown in fig. 8, the working principle of the permanent magnet brake of the present embodiment is: when the coil 5 is disconnected, the magnetic force of the second permanent magnet 11 attracts the second armature 26 to move towards the coil 5 against the pulling force of the leaf spring 3, the attraction force generated by the second permanent magnet 11 causes friction between the second armature 26 and the corresponding end surfaces of the first slot disc 24 and the second magnetic conduction plate 28, the friction force causes the second armature 26 and the rotor 8 not to rotate, and the brake is in a braking state; when the coil 5 is powered on, the electromagnetic field generated by the coil 5, that is, the electromagnet generates a repulsive force to the second armature 26, the repulsive force and the attractive force of the second permanent magnet 11 to the second armature 26 cancel each other, the second armature 26 is separated from the corresponding end surfaces of the first slot disc 24 and the second magnetic conduction plate 28 under the action of the tensile force of the leaf spring 3, the second armature 26 and the rotor 8 can freely rotate, and the brake is in a brake release state.
Example 3: the differences of this example compared to example 1 are: the stator is a circular second grooved disk 29, the coil 5 is arranged in the second grooved disk 29, the permanent magnet is a third permanent magnet 30, the armature is a third armature 33, the circular arc through hole of the armature is a third armature circular arc through hole 34, the magnetic conduction plate is a third magnetic conduction plate 31, the circular arc through hole of the magnetic conduction plate is a third magnetic conduction plate circular arc through hole 32, the third permanent magnet 30 is arranged in the third armature 33, the third magnetic conduction plate 31 is arranged on the second grooved disk 29 and the third magnetic conduction plate 31 is positioned between the coil 5 and the third armature 33, and the third magnetic conduction plate 31 is connected with the second grooved disk 29 through screws. This construction forms an improved permanent magnet brake with permanent magnets disposed in the armature.
Compared with the permanent magnetic brake with the traditional permanent magnet arranged in the armature, the permanent magnetic brake of the embodiment is mainly improved aiming at the traditional armature, meanwhile, for the purpose of distinguishing the permanent magnetic brake from other embodiments, the part name and the number of marks of the third armature 33 are adopted after improvement, meanwhile, the magnetic guide plate is added, for the purpose of distinguishing the permanent magnetic brake from other embodiments, the part name and the number of marks of the third magnetic guide plate 31 are adopted, meanwhile, the adaptability of the traditional grooved disc is required to be improved, and for the purpose of distinguishing the permanent magnetic brake from other embodiments, the part name and the number of marks of the second grooved disc 29 are adopted; meanwhile, the leaf spring 3, the coil 5, the third magnetic conductive plate 31 and the rotor 8 are not modified, and the conventional mounting plate is replaced with the third magnetic conductive plate 31.
As shown in fig. 9, the working principle of the permanent magnet brake of the present embodiment is: when the coil 5 is disconnected from the power supply, the magnetic force of the third permanent magnet 30 attracts the second slot disc 29 and the third magnetic conduction plate 31, so that the third armature 33 moves towards the direction approaching the coil 5 against the tensile force of the leaf spring 3, the attractive force generated by the third permanent magnet 30 enables the third armature 33 to be in contact with the corresponding end surfaces of the second slot disc 29 and the third magnetic conduction plate 31 to generate friction, and the friction force enables the third armature 33 and the rotor 8 to be unable to rotate, so that the brake is in a braking state; when the coil 5 is powered on, the electromagnetic field generated by the coil 5, that is, the electromagnet generates a repulsive force to the third armature 33, the repulsive force and the attractive force of the third permanent magnet 30 to the second slot disc 29 and the third magnetic conduction plate 31 cancel each other, the third armature 33 is separated from the corresponding end surfaces of the second slot disc 29 and the third magnetic conduction plate 31 under the action of the tensile force of the leaf spring 3, the third armature 33 and the rotor 8 can freely rotate, and the brake is in a brake release state.
Also shown in fig. 1-4 and 7-9 is a felt 9 for wiping the outer wall surface of the rotor 8 with oil, of conventional construction.
The above embodiments are only preferred embodiments of the present application, and are not limiting to the technical solutions of the present application, and any technical solution that can be implemented on the basis of the above embodiments without inventive effort should be considered as falling within the scope of protection of the patent claims of the present application.
Claims (6)
1. The utility model provides a little volume big moment of torsion's permanent magnetism stopper, includes rotor, stator, armature, spring, coil and permanent magnet, the coil is installed in the stator, annular armature with the rotor is connected and makes through the spring the armature has the elasticity of keeping away from the stator, the magnetic force of permanent magnet makes the armature is close to the stator, its characterized in that: the magnetic brake comprises a plurality of armature circular arc through holes arranged at intervals in the circumferential direction of a virtual circle or the circumferential direction of a plurality of virtual circles arranged inside and outside, and is characterized in that the magnetic brake further comprises a circular ring-shaped conductive magnetic plate, the central position of the magnetic plate is provided with a magnetic plate central through hole, a plurality of magnetic plate circular arc through holes arranged at intervals in the circumferential direction of the virtual circle or the circumferential direction of the virtual circles arranged inside and outside are arranged on the magnetic plate between the magnetic plate central through hole and the peripheral edge, one side surface of the magnetic plate is contacted with one side surface of the armature, and the position relationship between the armature circular arc through holes and the magnetic plate circular arc through holes meets the following conditions: after being projected on the same virtual plane parallel to the plane of the armature, the armature circular-arc through holes and the magnetic conductive plate circular-arc through holes are respectively positioned in the circumferential directions of virtual circles with different diameters and are arranged at intervals inside and outside, and gaps are reserved between the adjacent armature circular-arc through holes and the magnetic conductive plate circular-arc through holes.
2. The small volume high torque permanent magnet brake of claim 1, wherein: one end of the rotor is provided with an integrally formed rotary table, the spring is a leaf spring, the armature is connected with the rotary table through the leaf spring, and the magnetic conduction plate is arranged on the stator and located between the coil and the armature.
3. The small volume high torque permanent magnet brake of claim 2, wherein: the armature circular arc through holes are arranged at intervals in the circumferential direction of one virtual circle, the magnetic conductive plate circular arc through holes are respectively arranged at intervals in the circumferential direction of two virtual circles, and the armature circular arc through holes are positioned between the two magnetic conductive plate circular arc through holes which are arranged inside and outside.
4. A small volume high torque permanent magnet brake according to claim 2 or 3, characterized in that: the stator comprises a circular inner groove disc and a circular outer groove disc, the coil is arranged between the inner groove disc and the outer groove disc, the permanent magnet is a circular first permanent magnet, the armature is a first armature, the circular arc through hole of the armature is a circular arc through hole of the first armature, the magnetic plate is a first magnetic plate, the circular arc through hole of the magnetic plate is a circular arc through hole of the first magnetic plate, the first permanent magnet is arranged between the inner groove disc and the outer groove disc through a retainer, the coil is arranged between the first permanent magnet and the first armature, the first magnetic plate is arranged between the inner groove disc and the outer groove disc, the first magnetic plate is arranged between the coil and the first armature, and the first magnetic plate is connected with the inner groove disc through screws.
5. A small volume high torque permanent magnet brake according to claim 2 or 3, characterized in that: the stator is a first annular groove disc, the coil is arranged in the first groove disc, the permanent magnet is a second annular permanent magnet, the armature is a second armature, the armature circular arc through hole is a second armature circular arc through hole, the magnetic conduction plate is a second magnetic conduction plate, the magnetic conduction plate circular arc through hole is a second magnetic conduction plate circular arc through hole, the second permanent magnet is arranged between the first groove disc and the second magnetic conduction plate and is positioned between the coil and the second armature, the second magnetic conduction plate is arranged on the first groove disc and is positioned between the coil and the second armature, and the second magnetic conduction plate is connected with the first groove disc through screws.
6. A small volume high torque permanent magnet brake according to claim 2 or 3, characterized in that: the stator is a circular second slot disc, the coil is arranged in the second slot disc, the permanent magnet is a third permanent magnet, the armature is a third armature, the circular arc through hole of the armature is a circular arc through hole of the third armature, the magnetic conduction plate is a third magnetic conduction plate, the circular arc through hole of the magnetic conduction plate is a circular arc through hole of the third magnetic conduction plate, the third permanent magnet is arranged in the third armature, the third magnetic conduction plate is arranged on the second slot disc and is positioned between the coil and the third armature, and the third magnetic conduction plate is connected with the second slot disc through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311086948.9A CN116771823A (en) | 2023-08-28 | 2023-08-28 | Small-size large-torque permanent magnet brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311086948.9A CN116771823A (en) | 2023-08-28 | 2023-08-28 | Small-size large-torque permanent magnet brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116771823A true CN116771823A (en) | 2023-09-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311086948.9A Pending CN116771823A (en) | 2023-08-28 | 2023-08-28 | Small-size large-torque permanent magnet brake |
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| Country | Link |
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| CN (1) | CN116771823A (en) |
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| DE102012001701B3 (en) * | 2012-01-31 | 2013-03-14 | Kendrion Magneta Gmbh | Spring-loaded brake for use at e.g. drive housing, has magnet housing part including perforations, projections or openings for perforations of screws at outer circumference, where magnets do not include holes or perforations for screws |
| CN105370754A (en) * | 2014-08-08 | 2016-03-02 | 法雷奥日本株式会社 | Electromagnetic clutch |
| CN206478136U (en) * | 2016-12-30 | 2017-09-08 | 苏州采奕动力科技有限公司 | A kind of magneto dead electricity electromagnetic clutch |
| CN108458013A (en) * | 2018-03-23 | 2018-08-28 | 康德瑞恩电磁科技（中国）有限公司 | High magnetic horizontal permanent magnet brake |
| US20190226537A1 (en) * | 2016-10-07 | 2019-07-25 | Chr. Mayr Gmbh + Co. Kg | Control Method of an Electromagnetic Brake with a Controllable Armature Disc Movement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3055475A (en) * | 1958-12-19 | 1962-09-25 | Jr Wade H Pitts | Electromagnetic drive |
| JPS63112630U (en) * | 1987-01-13 | 1988-07-20 | ||
| CN2156335Y (en) * | 1991-11-09 | 1994-02-16 | 国营五三工厂 | Permanent magnet brake for electricity losing |
| JPH06102284A (en) * | 1992-09-21 | 1994-04-15 | Toyota Autom Loom Works Ltd | Rotation detector for compressor |
| US20100000481A1 (en) * | 2006-12-11 | 2010-01-07 | Nittan Valve Co., Ltd. | Phase varying apparatus for engine |
| CN101275609A (en) * | 2007-03-30 | 2008-10-01 | 美蓓亚株式会社 | Electromagnetic clutch |
| JP2009007104A (en) * | 2007-06-27 | 2009-01-15 | Hitachi Ltd | Brake device |
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| DE102012001701B3 (en) * | 2012-01-31 | 2013-03-14 | Kendrion Magneta Gmbh | Spring-loaded brake for use at e.g. drive housing, has magnet housing part including perforations, projections or openings for perforations of screws at outer circumference, where magnets do not include holes or perforations for screws |
| CN105370754A (en) * | 2014-08-08 | 2016-03-02 | 法雷奥日本株式会社 | Electromagnetic clutch |
| US20190226537A1 (en) * | 2016-10-07 | 2019-07-25 | Chr. Mayr Gmbh + Co. Kg | Control Method of an Electromagnetic Brake with a Controllable Armature Disc Movement |
| CN206478136U (en) * | 2016-12-30 | 2017-09-08 | 苏州采奕动力科技有限公司 | A kind of magneto dead electricity electromagnetic clutch |
| CN108458013A (en) * | 2018-03-23 | 2018-08-28 | 康德瑞恩电磁科技（中国）有限公司 | High magnetic horizontal permanent magnet brake |
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