CN112332634A - Permanent magnet disc type coupling torque limiting device - Google Patents

Abstract

The invention discloses a permanent magnet disc type coupling torque limiting device. The device comprises a disc type mechanism I, a buffer mechanism and a disc type mechanism II. The first disc mechanism comprises a first disc, a second disc, a first cylinder shaft, a first plurality of magnetic coils and a plurality of groups of coil assemblies, each buffering mechanism comprises a mounting disc structure and a second plurality of magnetic coils, and the second disc mechanism comprises a fixed disc structure and a third plurality of magnetic coils. According to the invention, the buffer mechanism is arranged between the driving part and the driven part of the coupler, the driving part can be combined with the driven part through the buffer mechanism, the buffer mechanism can buffer the speed difference, and the threshold control of the torque and the speed difference is realized through a physical structure. The rotation speed difference of the input end and the output end of the coupler and the transmitted torque are positively correlated with the local heat generation of the magnetic conduction disc in a working stroke, the control of the local temperature of the permanent magnet coupler under the high-load working condition is realized by limiting the torque and the rotation speed difference of the coupler, and the permanent magnet is prevented from losing efficacy due to local high temperature under the high-load working condition.

Description

Permanent magnet disc type coupling torque limiting device

Technical Field

The invention relates to a torque limiting device in the technical field of couplers, in particular to a permanent magnet disc type coupler torque limiting device.

Background

The coupling is a device for connecting two shafts or a shaft and a rotating part, rotating together in the process of transmitting motion and power and not separating under normal conditions. The coupling is also sometimes used as a safety device to prevent the coupled parts from bearing excessive load, and plays a role of high load protection. However, when the rotation speed difference is too large, the conventional permanent magnet coupling locally generates high temperature, so that the permanent magnet fails.

Disclosure of Invention

The invention provides a permanent magnet disc type coupling torque limiting device, which aims to solve the technical problem that a permanent magnet fails due to local high temperature when the rotating speed difference of the existing permanent magnet coupling is too large.

The invention is realized by adopting the following technical scheme: a permanent magnet disc type coupling torque limiting device comprises:

the disc mechanism I comprises a disc I, a disc II, a cylinder shaft I, a plurality of magnetic coils I and a plurality of groups of coil assemblies; the second disc is coaxially arranged with the first disc, and is separated from the first disc and is relatively fixed; the first cylinder shaft and the second disc are coaxially arranged, and one end of the first cylinder shaft is fixed on a central hole of the second disc; a plurality of groups of wire grooves extending to the center of the second disc are formed in the same side, facing the first disc, of the first cylinder shaft and the second disc, and each group of wire grooves is provided with a wire inlet groove and a wire outlet groove; a plurality of groups of through holes corresponding to the plurality of groups of wire grooves are formed in the wall of the first cylinder shaft; the magnetic rings I are uniformly arranged on the same circular ring and are arranged on the disc I; a mounting gap corresponding to one group of wire grooves is reserved between every two adjacent magnetic coils, and the magnetic poles between every two adjacent magnetic coils are arranged in opposite directions; the coil assemblies are respectively corresponding to the mounting gaps, and each coil assembly is mounted in the corresponding mounting gap; the incoming and outgoing wires of each group of coil assemblies positioned on one side of the second disc are positioned in the corresponding incoming and outgoing wire grooves, laid on the inner wall of the first cylinder shaft and extend out of the other side of the second disc through the corresponding group of through holes; the coils of the multiple groups of coil assemblies are sequentially connected in series; after the multiple groups of coil assemblies are electrified, the direction of an alternating magnetic field generated by each coil assembly is the same as or opposite to the direction of the magnetic field of the adjacent two first magnetic coils;

each buffer mechanism comprises a mounting disc structure and a plurality of magnetic coils II which respectively correspond to the magnetic coils I; the mounting disc structure and the disc are coaxially arranged and separated from each other, and are close to the first disc; the magnetic rings II are uniformly arranged on the same circular ring and are arranged on the mounting disc structure; the magnetic poles of each magnetic ring II and the corresponding magnetic ring I are arranged along the axial direction, and the directions of the magnetic poles at two adjacent sides are the same;

the disc type mechanism II comprises a fixed disc structure and a plurality of magnetic coils III which respectively correspond to the magnetic coils II; the fixed disc structure and the mounting disc structure are coaxially arranged and separated from each other; the magnetic rings III are uniformly arranged on the same circular ring and are arranged on the fixed disk structure; the magnetic poles of each magnetic ring III and the corresponding magnetic ring II are arranged along the axial direction, and the directions of the magnetic poles at two adjacent sides are opposite.

According to the invention, at least one buffer mechanism is arranged between the driving part and the driven part of the coupler, when a rotation speed difference is generated between the driving shaft and the driven shaft, due to the magnetic attraction effect between the magnetic ring II and the magnetic ring I and the magnetic ring III of the buffer mechanism, the driving part can be combined with the driven part through the buffer mechanism, the buffer mechanism can play a role in buffering the rotation speed difference, and the threshold control of torque and rotation speed difference is realized through a physical structure, so that the torque can not be reduced under the condition of increasing the rotation speed, the torque limiting effect is realized, and the problem that the existing coupler is invalid due to the reduction of the torque when the rotation speed difference is too large is solved.

As a further improvement of the above scheme, the fixed disk structure comprises a disk three, a disk four and a cylinder shaft two; the disc III and the disc IV are coaxially arranged and are separated from each other and are relatively fixed; the cylinder shaft II and the disc III are coaxially arranged, and one end of the cylinder shaft II is fixed on a central hole of the disc III; a plurality of magnetic coils III are fixed between the disc III and the disc IV; the first cylinder shaft and the second cylinder shaft are respectively used as a driving shaft and a driven shaft of a coupler.

As a further improvement of the above scheme, the mounting plate structure comprises a first mounting plate, a second mounting plate and a plurality of mounting columns; the first mounting plate and the second mounting plate are coaxially arranged and separated from each other and are fixed through a plurality of mounting columns; the magnetic coils II are arranged between the first mounting disk and the second mounting disk, and the same sides of the magnetic coils II are embedded in the first mounting disk and the other sides of the magnetic coils II are embedded in the second mounting disk.

As a further improvement of the above solution, the disc mechanism further comprises a plurality of connecting members; the first disc is fixedly connected with the second disc through a plurality of connecting pieces; the connecting pieces are divided into two groups of connecting columns, one group of connecting columns are used for fixing the outer edges of the first disk and the second disk, and the other group of connecting columns are used for fixing the inner edges of the first disk and the second disk.

As a further improvement of the above scheme, a plurality of mounting holes corresponding to the plurality of magnetic coils are formed on the first disc; each magnetic ring is provided with a protruding part, and the protruding parts are embedded and fixed in the corresponding mounting holes.

As a further improvement of the above scheme, each group of coil assemblies comprises a winding post, a coil and a fixing piece; the winding post is arranged in the mounting gap, the coil is wound on the winding post, two opposite ends of the fixing piece are fixedly connected with the two adjacent magnetic coils respectively, and the winding post is fixed between the two adjacent magnetic coils.

As a further improvement of the scheme, the first cylinder shaft is flush with the end face of the second disc and is sleeved in the central hole; each group of through holes comprises two square holes; the two square holes are positioned on the same axial direction of the first cylinder shaft and are respectively used as a wire inlet hole and a wire outlet hole of the inlet wire and the outlet wire; all wire inlet holes are located in the same circumferential direction, and all wire outlet holes are located in the same circumferential direction.

As a further improvement of the above scheme, the first disk, the fourth disk and the fixing piece are made of stainless steel, and the second disk and the third disk are made of iron.

As a further improvement of the above solution, the first cylinder shaft has a step; the step is fixed on one side, far away from the first disc, of the second disc through a plurality of positioning columns.

The invention also provides a permanent magnet disc type coupling torque limiting device, which comprises:

the first disc mechanism comprises a first disc, a second disc, a first cylinder shaft, a plurality of first magnetic coils and a plurality of first coil assemblies; the second disc is coaxially arranged with the first disc, and is separated from the first disc and is relatively fixed; the first cylinder shaft and the second disc are coaxially arranged, and one end of the first cylinder shaft is fixed on a central hole of the second disc; a plurality of groups of wire grooves extending to the center of the second disc are formed in the same side, facing the first disc, of the first cylinder shaft and the second disc, and each group of wire grooves is provided with a wire inlet groove and a wire outlet groove; a plurality of groups of through holes corresponding to the plurality of groups of wire grooves are formed in the wall of the first cylinder shaft; the magnetic rings I are uniformly arranged on the same circular ring and are arranged on the disc I; a mounting gap corresponding to one group of wire grooves is reserved between every two adjacent magnetic coils, and the magnetic poles between every two adjacent magnetic coils are arranged in opposite directions; the multiple groups of coil assemblies I respectively correspond to the multiple mounting gaps, and each group of coil assemblies I is mounted in the corresponding mounting gaps; the incoming and outgoing wires of each group of coil assemblies one positioned on one side of the second disc are positioned in the corresponding incoming and outgoing wire grooves, laid on the inner wall of the first cylinder shaft and extend out of the other side of the second disc through the corresponding group of through holes; the coils of the first coil assembly are sequentially connected in series; after the multiple groups of coil assemblies I are electrified, the direction of an alternating magnetic field generated by each coil assembly I is the same as or opposite to the direction of the magnetic fields of the two adjacent magnetic coils I;

each buffer mechanism comprises a mounting disc structure and a plurality of magnetic coils II which respectively correspond to the magnetic coils I; the mounting disc structure and the disc are coaxially arranged and separated from each other, and are close to the first disc; the magnetic rings II are uniformly arranged on the same circular ring and are arranged on the mounting disc structure; the magnetic poles of each magnetic ring II and the corresponding magnetic ring I are arranged along the axial direction, and the directions of the magnetic poles at two adjacent sides are the same;

the disc type mechanism II comprises a fixed disc structure and a plurality of groups of coil assemblies II which respectively correspond to the plurality of magnetic coils II; the fixed disc structure and the mounting disc structure are coaxially arranged and separated from each other; the coil assemblies II are uniformly arranged on the same circular ring and are arranged on the fixed disc structure; the magnetic pole direction of the magnetic field generated by each coil assembly II after being electrified is arranged along the axial direction, and the magnetic pole direction of the two sides, close to each corresponding magnetic coil assembly II, of each coil assembly II is opposite to that of the two sides.

Compared with the existing coupler, the permanent magnet disc type coupler torque limiting device has the following beneficial effects:

1. the permanent magnet disc type coupling torque limiting device is characterized in that at least one buffer mechanism is arranged between a driving part and a driven part of a coupling, when a rotating speed difference is generated between a driving shaft and a driven shaft, due to the magnetic attraction effect between a magnetic ring II and a magnetic ring I and a magnetic ring III of the buffer mechanism, the driving part can be combined with the driven part through the buffer mechanism, the buffer mechanism can play a buffer effect on the rotating speed difference, the threshold control of torque and the rotating speed difference is realized through a physical structure, the torque can be ensured not to be reduced under the condition of increasing the rotating speed, the torque limiting effect is realized, and the problem that the coupling fails due to the fact that the torque is reduced when the rotating speed difference is too large is solved.

2. The permanent magnet disc type coupling torque limiting device is characterized in that a group of coil assemblies are arranged between two first magnetic coils, incoming and outgoing wires of the coil assemblies enter a first cylinder shaft through an incoming wire groove and an outgoing wire groove and further extend out of a through hole, so that after the coil assemblies are electrified, a magnetic field generated by the coil assemblies can be enhanced or weakened due to the fact that the directions of the magnetic fields of the two adjacent first magnetic coils are the same or opposite, and the torque can be changed to adjust the rotating speed of a rotor. Because the speed regulation is directly carried out by changing the magnetic field intensity in the regulation process, the torque cannot generate sudden change, the speed regulation process is more stable, the speed-up reaction is faster, the technical problem that the existing speed regulator has slow reaction is solved, the speed regulation of the speed regulator is more timely and faster, and the speed regulation is more stable.

3. The coil assembly of the permanent magnet disc type coupling torque limiting device comprises a winding post, a coil and a fixing piece. The coils are wound on the winding posts, so that a magnetic field can be generated when the coils pass through current, and the coils are connected in series, so that the magnetic field can be generated almost simultaneously to strengthen or weaken the original magnetic field nearby, and the adjustment of the overall magnetic field intensity is ensured. The mounting can guarantee that wrapping post and coil can fix steadily between two adjacent magnetic circles, play location and fixed effect.

4. The rotation speed difference of the input end and the output end of the permanent magnet disc type coupling and the transmitted torque are in positive correlation with the local heat production of the magnetic conductive disc in the working stroke, and the rotation speed difference and the torque working stroke of the permanent magnet disc type coupling can be about 70% of the overload peak value to meet the linear control effect. The torque limiting device can control the local temperature of the permanent magnet coupler under the high-load working condition by limiting the torque and the rotating speed difference of the coupler, and prevent the permanent magnet from losing efficacy due to local high temperature under the high-load working condition.

Drawings

Fig. 1 is a first perspective view of a permanent magnet disc coupling torque limiting device according to embodiment 1 of the present invention.

Fig. 2 is a second perspective view of a permanent magnet disc coupling torque limiting device according to embodiment 1 of the present invention.

Fig. 3 is a top view of the permanent magnet disc coupling torque limiting device of fig. 1.

Fig. 4 is a first perspective view of a first disc mechanism of the permanent magnet disc coupling torque limiting device in fig. 1.

Fig. 5 is a second perspective view of the first disc mechanism of the permanent magnet disc coupling torque limiting device in fig. 1.

Fig. 6 is a third perspective view of the first disc mechanism of the first permanent magnet disc coupling torque limiting device in fig. 1.

Fig. 7 is a schematic perspective view of the first disk mechanism of fig. 4 with a first disk removed.

Fig. 8 is a schematic perspective view of the first disk mechanism of fig. 6 with a first disk removed.

Fig. 9 is a schematic perspective view of the first disk mechanism of fig. 4 with the first disk and the second disk removed.

Fig. 10 is a schematic perspective view of the first disk mechanism of fig. 5 with the first disk and the second disk removed.

Fig. 11 is a schematic perspective view of the first disk mechanism of fig. 6 with the first disk and the second disk removed.

Fig. 12 is a schematic perspective view of a damping mechanism of the permanent magnet disc coupling torque limiting device in fig. 1.

Fig. 13 is a schematic perspective view of a second disc mechanism of the permanent magnet disc coupling torque limiting device in fig. 1.

Fig. 14 is a schematic perspective view of a permanent magnet disc coupling torque limiting device according to embodiment 2 of the present invention.

Fig. 15 is a schematic perspective view of the permanent magnet disc coupling torque limiting device in fig. 14 with the disc four removed.

Description of the symbols:

1 disc-12 steps

2 two 13 mounting disc structures of disc

3 cylinder shaft one 14 magnetic ring two

4 magnetic ring-15 fixed disc structure

5 coil assembly one 16 disc three

6 connecting piece 17 disc four

7-wire groove 18-cylinder shaft II

8 through hole 19 mounting plate one

9 projection 20 mounting plate two

10 winding post 21 mounting post

11 fixing piece

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

Referring to fig. 1, 2 and 3, the present embodiment provides a torque limiting device for a permanent magnet disc type coupling, which is used for limiting a torque between a driving shaft and a driven shaft of the coupling. The moment limiting device comprises a disc type mechanism I, a buffer mechanism and a disc type mechanism II. In the embodiment, the first disc mechanism and the second disc mechanism are respectively used as a driving part and a driven part of the coupler, and the buffer mechanism is used as a buffer part between the driving shaft and the driven shaft and used for buffering the rotating speed.

Referring to fig. 4-11, a first disk mechanism includes a first disk 1, a second disk 2, a first bobbin 3, a plurality of first magnetic coils 4, a plurality of coil assemblies 5, and a plurality of connecting members 6. The second disk 2 is arranged coaxially with the first disk 1 and is spaced apart from the first disk 1. The material of the second disc 2 is iron, and the diameter of the second disc 2 is slightly larger than that of the first disc 1. A gap is formed between the second disc 2 and the first disc 1, and the sum of the thickness of the gap and the thickness of the mounting hole in the axial direction is the same as that of the magnetic coil 4. Thus, the first magnetic ring 4 can be firmly clamped between the first disk 1 and the second disk 2 without deviation, and the first magnetic ring 4 is convenient to fix.

The first cylinder shaft 3 is arranged coaxially with the second disk 2, and one end of the first cylinder shaft is fixed on a central hole of the second disk 2. Wherein, a plurality of groups of wire grooves 7 extending to the center of the disc II 2 are arranged on the same side of the cylinder shaft I3 and the disc II 2 facing the disc I1, and each group of wire grooves 7 is provided with a wire inlet groove and a wire outlet groove. The wall of the first drum shaft 3 is provided with a plurality of groups of through holes 8 which respectively correspond to the plurality of groups of wire grooves 7. In the embodiment, the first cylinder shaft 3 is flush with the end face of the second disk 2 and is sleeved in the central hole. And, the first cylinder shaft 3 has a step 12. The step 12 is fixed on one side of the disc II 2 far away from the disc I1 through a plurality of positioning columns. And, each set of through holes 8 includes two square holes. The two square holes are positioned on the same axial direction of the first cylinder shaft 3 and are respectively used as wire inlet holes and wire outlet holes of inlet wires and outlet wires. All wire inlet holes are located in the same circumferential direction, and all wire outlet holes are located in the same circumferential direction.

A plurality of magnetic rings I4 are uniformly arranged on the same circular ring and are arranged on the first disc I1. An installation gap corresponding to a group of wire grooves 7 is reserved between two adjacent magnetic coils 4, and the magnetic poles between the two adjacent magnetic coils 4 are arranged in opposite directions. The first magnetic ring 4 is in a fan shape and is attached to the second disk 2. In this embodiment, each of the first magnetic coils 4 has a protrusion 9, and the protrusion 9 is inserted and fixed in the corresponding mounting hole. Generally, the number of the first magnetic ring 4 is 4-16, and is even. For convenience of description, the number of the first magnetic coil 4 is set to 8, and in other embodiments, the number of the first magnetic coil 4 may be 4, 6, 10, 12, 16, or 18, and may be specifically set according to actual needs, and accordingly, the larger the number is, the smaller the radian of the first magnetic coil 4 is.

In the present embodiment, each set of coil blocks 5 includes a winding leg 10, a coil, and a fixing member 11. The winding post 10 is installed in the installation gap, the coil is wound on the winding post 10, the two opposite ends of the fixing member 11 are respectively and fixedly connected with the two adjacent magnetic coils one 4, and the winding post 10 is fixed between the two adjacent magnetic coils one 4.

The multiple groups of coil assemblies 5 respectively correspond to the multiple mounting gaps, and each group of coil assemblies 5 is mounted in the corresponding mounting gaps. The incoming and outgoing wires of each group of coil assemblies 5 positioned on one side of the second disc 2 are positioned in the corresponding incoming and outgoing wire grooves, are laid on the inner wall of the first barrel shaft 3, and penetrate through the corresponding group of through holes 8 to extend out of the other side of the second disc 2. The coils of the coil assemblies 5 are connected in series in sequence, so that the coils form a circuit, and a uniform changing magnetic field can be generated through the circuit by current.

The first disc 1 and the second disc 2 are fixedly connected through a plurality of connecting pieces 6. In this embodiment, the material of the fixing member 11 is stainless steel. The connecting pieces 6 are divided into two groups of connecting columns, wherein one group of connecting columns is used for fixing the outer edges of the first disk 1 and the second disk 2, and the other group of connecting columns is used for fixing the inner edges of the first disk 1 and the second disk 2.

After the multiple sets of coil assemblies 5 are electrified, the direction of the alternating magnetic field generated by each coil assembly 5 is the same as or opposite to the direction of the magnetic fields of the two adjacent magnetic coils one 4. Therefore, the magnetic field generated by the coil assembly 5 can enhance or offset the original magnetic field, namely, the magnitude of the magnetic field generated by the speed regulator can be controlled through the magnitude of the input current, so that the corresponding rotating speed can be changed. And because the magnetic field intensity is adjusted through the direction and the size of the current, the reaction speed of adjusting the rotating speed is very fast, the time delay is very small, and the stability of the rotating speed change is better because the rotating speed is adjusted through the current change.

Referring to fig. 12, the number of the buffer mechanisms is at least one, in this embodiment, for convenience of description, the number of the buffer mechanisms is set to two, and in other embodiments, the number of the buffer mechanisms may be one, three or more. Each buffer mechanism comprises a mounting disc structure 13 and a plurality of magnetic coils II 14 corresponding to the magnetic coils I respectively. The mounting plate structure 13 is disposed coaxially with and spaced from the first disk and adjacent to the first disk. And a plurality of second magnetic coils 14 are uniformly arranged on the same circular ring and are arranged on the mounting disc structure 13. The second magnetic ring 14 and the magnetic poles of the corresponding first magnetic ring are arranged along the axial direction, and the directions of the magnetic poles at two adjacent sides are the same. The mounting plate structure 13 includes a first mounting plate 19, a second mounting plate 20, and a plurality of mounting posts 21. The first mounting plate 19 and the second mounting plate 20 are coaxially arranged and spaced apart and fixed by a plurality of mounting posts 21. The second magnetic coils 14 are installed between the first installation disk 19 and the second installation disk 20, and the same side of each magnetic coil is embedded in the first installation disk 19, and the other side of each magnetic coil is embedded in the second installation disk 20.

In this embodiment, since the number of the buffer mechanisms is two, the second magnetic coils 14 of the two buffer mechanisms are also in a one-to-one correspondence relationship. The magnetic poles of the second magnetic ring 14 of one buffer mechanism and the magnetic poles of the second magnetic ring 14 of the adjacent buffer mechanism are arranged in the same mode, and the magnetic poles of the two second magnetic rings 14 close to each other are opposite, so that the two magnetic rings can play a role in attraction, the buffer mechanisms can form a combined effect, and the rotating speed change of the driving shaft part is transmitted to the driven shaft part.

Referring to fig. 13, the second disk mechanism includes a fixed disk structure 15 and a plurality of third magnetic coils, and the plurality of third magnetic coils correspond to the plurality of second magnetic coils 14, respectively. The fixed disk structure 15 is coaxially spaced from the mounting disk structure 13. The magnetic rings III are uniformly arranged on the same circular ring and are arranged on the fixed disk structure 15. The magnetic poles of each magnetic ring three and the corresponding magnetic ring two 14 are arranged along the axial direction, and the directions of the magnetic poles at two adjacent sides are opposite. In this embodiment, the fixed disk structure 15 includes a disk three 16, a disk four 17, and a shaft two 18. The third disc 16 is arranged coaxially with the fourth disc 17, and is spaced apart from and fixed relative to the fourth disc 17. The second cylinder shaft 18 is arranged coaxially with the third disc 16, and one end of the second cylinder shaft is fixed on the central hole of the third disc 16. And a plurality of magnetic coils III are fixed between the disc III 16 and the disc IV 17. In this embodiment, the material of the third disc 16 is iron, and the material of the fourth disc 17 is stainless steel. The first cylinder shaft and the second cylinder shaft 18 are respectively used as a driving shaft and a driven shaft of a coupler.

Compared with the existing coupler, the permanent magnet disc type coupler torque limiting device of the embodiment has the following advantages:

1. the permanent magnet disc type coupling torque limiting device is characterized in that at least one buffer mechanism is arranged between a driving part and a driven part of a coupling, when a rotating speed difference is generated between a driving shaft and a driven shaft, due to the magnetic attraction effect between a second magnetic ring 14 and a first magnetic ring and a third magnetic ring of the buffer mechanism, the driving part can be combined with the driven part through the buffer mechanism, the buffer mechanism can play a buffer effect on the rotating speed difference, the threshold control of torque and rotating speed difference is realized through a physical structure, the torque can be guaranteed not to be reduced under the condition of increasing the rotating speed, the torque limiting effect is achieved, and the problem that the coupling fails due to the fact that the torque is reduced when the rotating speed difference is too large is avoided.

2. According to the permanent magnet disc type coupling torque limiting device, a group of coil assemblies 5 are arranged between two first magnetic coils 4, incoming and outgoing wires of the coil assemblies 5 enter a first cylinder shaft 3 through an incoming wire groove and an outgoing wire groove and further extend out of a through hole 8, so that after the coil assemblies 5 are electrified, a magnetic field generated by the coil assemblies can be the same as or opposite to the magnetic field direction of the two adjacent first magnetic coils 4, the magnetic field can be strengthened or weakened, and the torque can be changed to adjust the rotating speed of a rotor. Because the speed regulation is directly carried out by changing the magnetic field intensity in the regulation process, the torque cannot generate sudden change, the speed regulation process is more stable, the speed-up reaction is faster, the technical problem that the existing speed regulator has slow reaction is solved, the speed regulation of the speed regulator is more timely and faster, and the speed regulation is more stable.

3. The permanent magnet disc type coupling torque limiting device comprises a coil assembly 5, a winding post 10, a coil and a fixing piece 11. The coils are wound around the post 10 so that they generate a magnetic field when a current is passed through them, and since the coils are connected in series, the magnetic field is generated almost simultaneously to enhance or weaken the original magnetic field in the vicinity, ensuring adjustment of the overall magnetic field strength. The fixing piece 11 can ensure that the winding post 10 and the coil can be stably fixed between two adjacent magnetic coils 4, and the positioning and fixing functions are achieved.

4. The rotation speed difference of the input end and the output end of the permanent magnet disc type coupling and the transmitted torque are in positive correlation with the local heat production of the magnetic conductive disc in the working stroke, and the rotation speed difference and the torque working stroke of the permanent magnet disc type coupling can be about 70% of the overload peak value to meet the linear control effect. The torque limiting device can control the local temperature of the permanent magnet coupler under the high-load working condition by limiting the torque and the rotating speed difference of the coupler, and prevent the permanent magnet from losing efficacy due to local high temperature under the high-load working condition.

Example 2

Referring to fig. 14 and 15, the present embodiment provides a permanent magnet disc coupling torque limiting device, which is similar to the permanent magnet disc coupling torque limiting device of embodiment 1, except that the disc mechanism is different. In this embodiment, the second disk mechanism includes a fixed disk structure 15 and a plurality of sets of second coil assemblies 22, and the plurality of sets of second coil assemblies 22 respectively correspond to the plurality of second magnetic coils 14. The fixed disk structure 15 is coaxially spaced from the mounting disk structure 13. The coil assemblies 22 are uniformly arranged on the same ring and are arranged on the fixed disc structure 15. The magnetic pole direction of the magnetic field generated by each second coil assembly 22 after being electrified is arranged along the axial direction, and the magnetic pole direction of the two sides, close to each corresponding second magnetic coil 14, of each second coil assembly 22 is opposite to that of the two sides. It should be noted that the fixed disk structure 15 includes a disk three 16, a disk four 17 and a cylinder shaft two 18. The third disc 16 is arranged coaxially with the fourth disc 17 and is spaced from and fixed relative to the fourth disc 17. The second cylinder shaft 18 is arranged coaxially with the third disc 16, and one end thereof is fixed to the center hole of the third disc 16. And a plurality of groups of coil assemblies two 22 are fixed between the disc three 16 and the disc four 17. The first cylinder shaft and the second cylinder shaft 18 are respectively used as a driving shaft and a driven shaft of a coupler. Therefore, when speed regulation is needed, currents of the first coil assembly and the second coil assembly 22 can be respectively regulated, and the magnetic field intensity of the first disc mechanism and the magnetic field intensity of the second disc mechanism are respectively changed, so that the torque regulation effect is achieved, and speed regulation can be further achieved. And due to the action of the buffer mechanism, the functions of torque limiting and buffering can be achieved, and the joint action of the coupler is ensured.

Example 3

The present embodiment provides a coupling including the permanent magnet disc coupling torque limiting device of embodiment 1 or 2, and further including a current source. The current source is used for generating direct current and transmitting the direct current to the first coil assembly and the second coil assembly, so that the first coil assembly and the second coil assembly can immediately generate corresponding magnetic fields. The current source can change the magnitude and the direction of the output current, so that the torque can be enhanced or weakened, and the joint action of the coupler can be adjusted.

Example 4

The embodiment provides a permanent magnet disc type coupling torque limiting method, which is applied to the permanent magnet disc type coupling torque limiting device in embodiment 2. The moment limiting method comprises the following steps.

(1) And supplying direct current to the first coil assembly 5 and the second coil assembly 22 to enable the first coil assembly 5 and the second coil assembly 22 to generate a magnetic field together, enable the magnetic field generated by the first disc mechanism and the adjacent buffer mechanism to generate a magnetic combined action, and enable the second disc mechanism and the adjacent buffer mechanism to generate a magnetic combined action.

(2) When the speed is increased, the direction of the magnetic field generated by each group of coil assemblies one 5 is consistent with the direction of the magnetic field generated by the two adjacent magnetic coils one 4, and the current in the plurality of groups of coil assemblies one 5 is increased according to the required increased speed so as to enable the rotating speed to reach the preset first rotating speed. And the preset first rotating speed is the accelerated rotating speed.

(3) During deceleration, the direction of the magnetic field generated by each group of the coil assemblies one 5 is opposite to the direction of the magnetic field generated by the two adjacent magnetic coils one 4, and the current in the plurality of groups of the coil assemblies one 5 is increased according to the required reduction speed so as to enable the rotating speed to reach a preset rotating speed two. And the preset rotating speed II is the rotating speed after deceleration.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A permanent magnet disc type coupling torque limiting device is characterized by comprising:

the disc mechanism I comprises a disc I, a disc II, a cylinder shaft I, a plurality of magnetic coils I and a plurality of groups of coil assemblies; the second disc is coaxially arranged with the first disc, and is separated from the first disc and is relatively fixed; the first cylinder shaft and the second disc are coaxially arranged, and one end of the first cylinder shaft is fixed on a central hole of the second disc; a plurality of groups of wire grooves extending to the center of the second disc are formed in the same side, facing the first disc, of the first cylinder shaft and the second disc, and each group of wire grooves is provided with a wire inlet groove and a wire outlet groove; a plurality of groups of through holes corresponding to the plurality of groups of wire grooves are formed in the wall of the first cylinder shaft; the magnetic rings I are uniformly arranged on the same circular ring and are arranged on the disc I; a mounting gap corresponding to one group of wire grooves is reserved between every two adjacent magnetic coils, and the magnetic poles between every two adjacent magnetic coils are arranged in opposite directions; the coil assemblies are respectively corresponding to the mounting gaps, and each coil assembly is mounted in the corresponding mounting gap; the incoming and outgoing wires of each group of coil assemblies positioned on one side of the second disc are positioned in the corresponding incoming and outgoing wire grooves, laid on the inner wall of the first cylinder shaft and extend out of the other side of the second disc through the corresponding group of through holes; the coils of the multiple groups of coil assemblies are sequentially connected in series; after the multiple groups of coil assemblies are electrified, the direction of an alternating magnetic field generated by each coil assembly is the same as or opposite to the direction of the magnetic field of the adjacent two first magnetic coils;

each buffer mechanism comprises a mounting disc structure and a plurality of magnetic coils II which respectively correspond to the magnetic coils I; the mounting disc structure and the disc are coaxially arranged and separated from each other, and are close to the first disc; the magnetic rings II are uniformly arranged on the same circular ring and are arranged on the mounting disc structure; the magnetic poles of each magnetic ring II and the corresponding magnetic ring I are arranged along the axial direction, and the directions of the magnetic poles at two adjacent sides are the same;

the disc type mechanism II comprises a fixed disc structure and a plurality of magnetic coils III which respectively correspond to the magnetic coils II; the fixed disc structure and the mounting disc structure are coaxially arranged and separated from each other; the magnetic rings III are uniformly arranged on the same circular ring and are arranged on the fixed disk structure; the magnetic poles of each magnetic ring III and the corresponding magnetic ring II are arranged along the axial direction, and the directions of the magnetic poles at two adjacent sides are opposite.

2. The permanent magnet disc coupling torque limiting device of claim 1, wherein the fixed disc structure comprises a disc three, a disc four and a drum shaft two; the disc III and the disc IV are coaxially arranged and are separated from each other and are relatively fixed; the cylinder shaft II and the disc III are coaxially arranged, and one end of the cylinder shaft II is fixed on a central hole of the disc III; a plurality of magnetic coils III are fixed between the disc III and the disc IV; the first cylinder shaft and the second cylinder shaft are respectively used as a driving shaft and a driven shaft of a coupler.

3. A permanent magnet disc coupling torque limiting device according to claim 1, wherein said mounting disc structure comprises a first mounting disc, a second mounting disc, and a plurality of mounting posts; the first mounting plate and the second mounting plate are coaxially arranged and separated from each other and are fixed through a plurality of mounting columns; the magnetic coils II are arranged between the first mounting disk and the second mounting disk, and the same sides of the magnetic coils II are embedded in the first mounting disk and the other sides of the magnetic coils II are embedded in the second mounting disk.

4. A permanent magnet disc coupling torque limiting device according to claim 1, wherein said disc mechanism further comprises a plurality of connecting members; the first disc is fixedly connected with the second disc through a plurality of connecting pieces; the connecting pieces are divided into two groups of connecting columns, one group of connecting columns are used for fixing the outer edges of the first disk and the second disk, and the other group of connecting columns are used for fixing the inner edges of the first disk and the second disk.

5. The permanent magnet disc type coupling torque limiting device according to claim 1, wherein a plurality of mounting holes corresponding to the plurality of magnetic coils are formed in the first disc; each magnetic ring is provided with a protruding part, and the protruding parts are embedded and fixed in the corresponding mounting holes.

6. A permanent magnet disc coupling torque limiting device according to claim 2, wherein each set of coil assemblies comprises a winding post, a coil and a fixing member; the winding post is arranged in the mounting gap, the coil is wound on the winding post, two opposite ends of the fixing piece are fixedly connected with the two adjacent magnetic coils respectively, and the winding post is fixed between the two adjacent magnetic coils.

7. The permanent magnet disc type coupling torque limiting device according to claim 1, wherein the first drum shaft is flush with the end face of the second disc and is sleeved in the central hole; each group of through holes comprises two square holes; the two square holes are positioned on the same axial direction of the first cylinder shaft and are respectively used as a wire inlet hole and a wire outlet hole of the inlet wire and the outlet wire; all wire inlet holes are located in the same circumferential direction, and all wire outlet holes are located in the same circumferential direction.

8. The permanent magnet disc coupling torque limiting device according to claim 6, wherein the first disc, the fourth disc and the fixing member are made of stainless steel, and the second disc and the third disc are made of iron.

9. A permanent magnet disc coupling torque limiting device according to claim 1, wherein said first spool has a step; the step is fixed on one side, far away from the first disc, of the second disc through a plurality of positioning columns.

10. A permanent magnet disc type coupling torque limiting device is characterized by comprising:

the first disc mechanism comprises a first disc, a second disc, a first cylinder shaft, a plurality of first magnetic coils and a plurality of first coil assemblies; the second disc is coaxially arranged with the first disc, and is separated from the first disc and is relatively fixed; the first cylinder shaft and the second disc are coaxially arranged, and one end of the first cylinder shaft is fixed on a central hole of the second disc; a plurality of groups of wire grooves extending to the center of the second disc are formed in the same side, facing the first disc, of the first cylinder shaft and the second disc, and each group of wire grooves is provided with a wire inlet groove and a wire outlet groove; a plurality of groups of through holes corresponding to the plurality of groups of wire grooves are formed in the wall of the first cylinder shaft; the magnetic rings I are uniformly arranged on the same circular ring and are arranged on the disc I; a mounting gap corresponding to one group of wire grooves is reserved between every two adjacent magnetic coils, and the magnetic poles between every two adjacent magnetic coils are arranged in opposite directions; the multiple groups of coil assemblies I respectively correspond to the multiple mounting gaps, and each group of coil assemblies I is mounted in the corresponding mounting gaps; the incoming and outgoing wires of each group of coil assemblies one positioned on one side of the second disc are positioned in the corresponding incoming and outgoing wire grooves, laid on the inner wall of the first cylinder shaft and extend out of the other side of the second disc through the corresponding group of through holes; the coils of the first coil assembly are sequentially connected in series; after the multiple groups of coil assemblies I are electrified, the direction of an alternating magnetic field generated by each coil assembly I is the same as or opposite to the direction of the magnetic fields of the two adjacent magnetic coils I;

each buffer mechanism comprises a mounting disc structure and a plurality of magnetic coils II which respectively correspond to the magnetic coils I; the mounting disc structure and the disc are coaxially arranged and separated from each other, and are close to the first disc; the magnetic rings II are uniformly arranged on the same circular ring and are arranged on the mounting disc structure; the magnetic poles of each magnetic ring II and the corresponding magnetic ring I are arranged along the axial direction, and the directions of the magnetic poles at two adjacent sides are the same;

the disc type mechanism II comprises a fixed disc structure and a plurality of groups of coil assemblies II which respectively correspond to the plurality of magnetic coils II; the fixed disc structure and the mounting disc structure are coaxially arranged and separated from each other; the coil assemblies II are uniformly arranged on the same circular ring and are arranged on the fixed disc structure; the magnetic pole direction of the magnetic field generated by each coil assembly II after being electrified is arranged along the axial direction, and the magnetic pole direction of the two sides, close to each corresponding magnetic coil assembly II, of each coil assembly II is opposite to that of the two sides.

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