A permanent magnet transmission mechanism

Abstract

The present invention discloses a permanent magnet drive mechanism, which includes a support unit, an input / output unit, and a transmission unit. During operation, the input shaft drives the outer yoke iron disk and the inner yoke iron disk to rotate synchronously. At this time, the stationary conductor disk is equivalent to making a circular motion of cutting the magnetic induction lines between the outer permanent magnet and the inner permanent magnet, so that an eddy current induction magnetic field is generated on the conductor disk. The eddy current induction magnetic field generated by the conductor disk interacts with the permanent magnet magnetic field of the input shaft, thereby realizing the non-contact torque transmission between the input shaft and the output shaft. The permanent magnet drive mechanism is in the working state of the speed governor. When the electromagnet controls the inner yoke iron disk to slide and connect to the output shaft, the conductor disk is adjusted through the second adjustment component. When the conductor disk slides to the conductor disk sleeve, the conductor disk and the conductor disk sleeve remain relatively stationary. The input shaft drives the outer yoke iron disk to rotate, and the inner yoke iron disk drives the output shaft to rotate, thereby realizing the non-contact constant speed transmission between the input shaft and the output shaft. At this time, the permanent magnet drive mechanism is in the working state of the coupling.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission devices and their peripheral supporting facilities, and particularly to a permanent magnet transmission mechanism. Background Art

[0002] Traditional couplings are widely used in various mechanical equipment. They use contact transmission of torque and have disadvantages such as large impact, short service life, and the need for lubrication. Currently, common magnetic drive mechanisms operate based on the magnetic force characteristics between magnetic materials and the principle of electromagnetic induction. Therefore, rotating components with permanent magnets and conductor rotating components can achieve non-contact transmission. Since there is no contact and a gap between the two rotating components, a sealed isolation sleeve can be set between them to achieve fully sealed and leak-free transmission, and the functions of soft starting and soft stopping of the motor can be realized. It can operate in harsh environments such as flammable, explosive, humid, and high dust content environments, and can adapt to situations such as unstable power grid quality and current change impact loads. It is mainly applied to speed regulation and energy saving of motor drive systems for high-power fans and pumps in fields such as chemical industry, petrochemical industry, coal cement, metallurgy and steel, and ships.

[0003] Magnetic speed regulators have good energy-saving effects and reduce operating costs. Magnetic couplings can achieve non-contact constant-speed transmission between the input end and the output end. Combining the two functions will make the application range of this mechanism wider and applicable to different working scenarios. The prior art with the publication number CN113206584A discloses a permanent magnet transmission device. The left rotor drives the right rotor to rotate by the inner rotor, and the rotational speed of the output shaft cannot be adjusted, reducing the flexible adaptability of the transmission device. The Chinese patent with the publication number CN103647433A discloses a permanent magnet transmission mechanism. The permanent magnet rotor is arranged between a pair of rotor plates, and the transmission structure is fixed, suitable for power transmission work in certain specific occasions.

[0004] In the prior art, the structures of magnetic speed regulators and magnetic couplings are fixed, increasing the limitation of the applicable occasions of the permanent magnet mechanism, and there are problems such as more magnetic leakage and a low proportion of effective induced current in the magnetic speed regulator. There is still a large room for improvement in the torque density of the structure, which also leads to low applicability of magnetic speed regulators and magnetic couplings.

[0005] Therefore, the problem of how to improve the adaptability of the existing permanent magnet transmission mechanism is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0006] The purpose of the present invention is to provide a permanent magnet transmission mechanism to solve the above problems existing in the prior art and improve the adaptability of the permanent magnet transmission mechanism.

[0007] To achieve the above purpose, the present invention provides the following solution: The present invention provides a permanent magnet transmission mechanism, including:

[0008] Support unit;

[0009] Input / output unit, the input / output unit includes an input shaft and an output shaft with a gap therebetween, and both the input shaft and the output shaft are rotatably arranged on the support unit;

[0010] Transmission unit, the transmission unit includes an outer yoke iron disc, an inner yoke iron disc, a conductor disc, an electromagnet and a conductor disc sliding sleeve. The outer yoke iron disc is slidably arranged on the input shaft, and the input shaft can drive the outer yoke iron disc to rotate. An outer permanent magnet is arranged on the inner wall of the larger-diameter end of the outer yoke iron disc. The outer yoke iron disc is connected with a first adjustment component, and the first adjustment component can drive the outer yoke iron disc to slide reciprocally, and the first adjustment component is connected with the support unit; The inner yoke iron disc can slide reciprocally between the input shaft and the output shaft. When the inner yoke iron disc slides to be connected with the input shaft, the input shaft can drive the inner yoke iron disc to rotate. When the inner yoke iron disc slides to be connected with the output shaft, the inner yoke iron disc can drive the output shaft to rotate. Inner permanent magnets are arranged on the outer wall of the inner yoke iron disc. The inner yoke iron disc can extend into the larger-diameter end of the outer yoke iron disc. The electromagnet is arranged on the input shaft, and the electromagnet is connected with an external power supply. The electromagnet can drive the inner yoke iron disc to slide; The output shaft is a stepped shaft, and the conductor disc sliding sleeve is rotatably sleeved on the output shaft. The conductor disc can slide between the output shaft and the conductor disc sliding sleeve. When the conductor disc slides to be connected with the output shaft, the conductor disc can drive the output shaft to rotate. When the conductor disc slides to be connected with the conductor disc sliding sleeve, the conductor disc and the conductor disc sliding sleeve remain relatively stationary. The larger-diameter end of the conductor disc can extend between the outer permanent magnet and the inner permanent magnet. The conductor disc is connected with a second adjustment component, and the second adjustment component can drive the conductor disc to slide reciprocally, and the second adjustment component is connected with the support unit.

[0011] Preferably, the number of both the outer permanent magnets and the inner permanent magnets is 2N, where N is a natural number greater than 0. The outer permanent magnets are circumferentially evenly distributed around the axis of the outer yoke iron disc, and the inner permanent magnets are circumferentially evenly distributed around the axis of the inner yoke iron disc. The magnetic poles of adjacent outer permanent magnets facing the conductor disc side are opposite, and the magnetic poles of adjacent inner permanent magnets facing the conductor disc side are opposite. And in the radial direction, the magnetic poles of the outer permanent magnets and the inner permanent magnets on both sides of the conductor disc are opposite.

[0012] Preferably, the first adjustment component and the second adjustment component have the same structure. Both of them include a mounting bracket, a driving motor, and an adjustment bracket. The mounting bracket is fixed on the support unit. The driving motor is arranged on the mounting bracket. The adjustment bracket is slidably connected to the mounting bracket. The adjustment bracket is connected to the outer yoke iron disc and the conductor disc. The driving motor is in transmission connection with the adjustment bracket.

[0013] Preferably, both the outer yoke iron disc and the conductor disc have insertion blocks, and the adjustment bracket has slots adapted to the insertion blocks. The slots are in plug-in connection with the insertion blocks.

[0014] Preferably, the mounting bracket is connected with rollers. The rollers are rotatably arranged on the mounting bracket. The adjustment bracket abuts against the outer circumferential surface of the rollers. The output end of the driving motor is connected with a transmission gear. The adjustment bracket is connected with a transmission rack. The transmission gear meshes with the transmission rack.

[0015] Preferably, the electromagnet is connected to an external power supply by means of a slip ring. The slip ring is arranged on the outer yoke iron disc.

[0016] Preferably, the outer yoke iron disc is slidably connected to the input shaft by means of a spline. The inner yoke iron disc is connected to the input shaft and the output shaft by means of a spline. The conductor disc is slidably sleeved on the output shaft and the conductor disc by means of a spline.

[0017] Preferably, the support unit includes a bottom plate and an input shaft support and an output shaft support arranged on the bottom plate. The input shaft is rotatably arranged on the input shaft support. The output shaft is rotatably arranged on the output shaft support. Bearings are arranged between the input shaft and the input shaft support and between the output shaft and the output shaft support. A bearing is arranged between the conductor disc slip sleeve and the output shaft.

[0018] Preferably, both the input shaft support and the output shaft support are detachably connected to the bottom plate, and the connection positions of the input shaft support and the output shaft support to the bottom plate can be adjusted.

[0019] Preferably, the conductor disc includes a web, an inner disc, and an outer disc. The web can be slidably connected to the output shaft and the conductor disc slip sleeve. The outer disc is connected to the web. The inner disc is embedded on the outer disc. The number of the inner discs is multiple. The inner discs are circumferentially distributed uniformly around the axis of the outer disc. There is a gap between adjacent inner discs. The inner disc and the web are made of steel material. The outer disc is made of copper material.

[0020] The present invention has achieved the following technical effects compared with the prior art:

[0021] In the permanent magnet drive mechanism of the present invention, during operation, the electromagnet controls the inner yoke iron disc to slide onto the input shaft, and the position of the conductor disc is adjusted by the second adjustment component so that the conductor disc is connected to the output shaft. The input shaft drives the outer yoke iron disc and the inner yoke iron disc to rotate synchronously. At this time, the stationary conductor disc is equivalent to making a circular motion that cuts the magnetic induction lines between the outer permanent magnet and the inner permanent magnet, causing the conductor disc to generate an eddy current induction magnetic field. The eddy current induction magnetic field generated by the conductor disc interacts with the permanent magnet magnetic field of the input shaft, thereby realizing non-contact torque transmission between the input shaft and the output shaft. The permanent magnet drive mechanism is in the working state of the speed governor. In the permanent magnet drive mechanism of the present invention, the outer permanent magnet and the inner permanent magnet act together on the conductor disc, which can greatly reduce magnetic leakage, reduce the power loss of the mechanism, and improve the adaptability of the mechanism. There is a speed difference between the input shaft and the output shaft. By adjusting the axial position of the outer yoke iron disc on the input shaft through the first adjustment component, the coupling area of the outer permanent magnet and the inner permanent magnet can be changed, thereby changing the speed difference and realizing non-contact speed regulation between the input shaft and the output shaft. When the electromagnet controls the inner yoke iron disc to slide and connect to the output shaft, the conductor disc is adjusted by the second adjustment component. When the conductor disc slides to the conductor disc sleeve, the conductor disc and the conductor disc sleeve remain relatively stationary. The input shaft drives the outer yoke iron disc to rotate. Due to the interaction between the outer permanent magnet and the inner permanent magnet, the inner yoke iron disc is driven to rotate, and the inner yoke iron disc drives the output shaft to rotate. The conductor disc and the conductor disc sleeve remain relatively stationary, thereby realizing non-contact constant speed transmission between the input shaft and the output shaft. At this time, the permanent magnet drive mechanism is in the working state of the coupling. The permanent magnet drive mechanism of the present invention can realize non-contact differential speed transmission between the input shaft and the output shaft, and the differential speed value is adjustable. It can also realize non-contact constant speed transmission between the input shaft and the output shaft, playing a role in vibration isolation and overload protection, and improving the adaptability of the permanent magnet drive mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the permanent magnet drive mechanism of the present invention;

[0024] Figure 2 It is a sectional structural diagram of the permanent magnet drive mechanism of the present invention when it is in the working state of the differential;

[0025] Figure 3 It is a sectional structural diagram of the permanent magnet drive mechanism of the present invention when it is in the working state of the coupling;

[0026] Figure 4 Structural schematic diagram of the conductor disk of the permanent magnet drive mechanism of the present invention;

[0027] Among them, 1 is the input shaft, 2 is the output shaft, 3 is the outer yoke iron disk, 4 is the inner yoke iron disk, 5 is the conductor disk, 501 is the web, 502 is the inner disk, 503 is the outer disk, 6 is the electromagnet, 7 is the conductor disk sliding sleeve, 8 is the outer permanent magnet, 9 is the inner permanent magnet, 10 is the first adjustment component, 11 is the second adjustment component, 12 is the mounting bracket, 13 is the drive motor, 14 is the adjustment bracket, 15 is the insertion block, 16 is the slot, 17 is the roller, 18 is the transmission gear, 19 is the transmission rack, 20 is the slip ring, 21 is the input shaft support, 22 is the output shaft support, and 23 is the bottom plate. Specific embodiments

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] The purpose of the present invention is to provide a permanent magnet drive mechanism to solve the problems existing in the above-mentioned prior art and improve the adaptability of the permanent magnet drive mechanism.

[0030] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The present invention provides a permanent magnet drive mechanism, which includes a support unit, an input-output unit, and a drive unit. Among them, the input-output unit includes an input shaft 1 and an output shaft 2 with a gap therebetween, and both the input shaft 1 and the output shaft 2 are rotatably arranged on the support unit; the drive unit includes an outer yoke iron disk 3, an inner yoke iron disk 4, a conductor disk 5, an electromagnet 6, and a conductor disk sliding sleeve 7. The outer yoke iron disk 3 is slidably arranged on the input shaft 1, and the input shaft 1 can drive the outer yoke iron disk 3 to rotate. An outer permanent magnet 8 is arranged on the inner wall of the larger-diameter end of the outer yoke iron disk 3. The outer yoke iron disk 3 is connected with a first adjustment assembly 10, and the first adjustment assembly 10 can drive the outer yoke iron disk 3 to slide reciprocally. The first adjustment assembly 10 is connected with the support unit; the inner yoke iron disk 4 can slide reciprocally between the input shaft 1 and the output shaft 2. When the inner yoke iron disk 4 slides to be connected with the input shaft 1, the input shaft 1 can drive the inner yoke iron disk 4 to rotate. When the inner yoke iron disk 4 slides to be connected with the output shaft 2, the inner yoke iron disk 4 can drive the output shaft 2 to rotate. An inner permanent magnet 9 is arranged on the outer wall of the inner yoke iron disk 4. The inner yoke iron disk 4 can extend into the larger-diameter end of the outer yoke iron disk 3. The electromagnet 6 is arranged on the input shaft 1, and the electromagnet 6 is connected with an external power supply. The electromagnet 6 can drive the inner yoke iron disk 4 to slide; the output shaft 2 is a stepped shaft, and the conductor disk sliding sleeve 7 is rotatably sleeved on the output shaft 2. The conductor disk 5 can slide between the output shaft 2 and the conductor disk sliding sleeve 7. When the conductor disk 5 slides to be connected with the output shaft 2, the conductor disk 5 can drive the output shaft 2 to rotate. When the conductor disk 5 slides to be connected with the conductor disk sliding sleeve 7, the conductor disk 5 and the conductor disk sliding sleeve 7 remain relatively stationary. The larger-diameter end of the conductor disk 5 can extend between the outer permanent magnet 8 and the inner permanent magnet 9. The conductor disk 5 is connected with a second adjustment assembly 11, and the second adjustment assembly 11 can drive the conductor disk 5 to slide reciprocally. The second adjustment assembly 11 is connected with the support unit.

[0032] When the permanent magnet drive mechanism of the present invention works, the electromagnet 6 controls the inner yoke iron disk 4 to slide onto the input shaft 1, and the second adjustment assembly 11 is used to adjust the position of the conductor disk 5 so that the conductor disk 5 is connected with the output shaft 2. The input shaft 1 drives the outer yoke iron disk 3 and the inner yoke iron disk 4 to rotate synchronously. At this time, the stationary conductor disk 5 is equivalent to making a circular motion of cutting the magnetic induction lines between the outer permanent magnet 8 and the inner permanent magnet 9, so that the conductor disk 5 generates an eddy current induction magnetic field. The eddy current induction magnetic field generated by the conductor disk 5 interacts with the permanent magnet magnetic field of the input shaft 1, thereby realizing the non-contact torque transmission between the input shaft 1 and the output shaft 2. The permanent magnet drive mechanism is in the working state of the speed governor. For details, see Figure 2。For the permanent magnet drive mechanism of the present invention, the outer permanent magnet 8 and the inner permanent magnet 9 act together on the conductor disk 5, which can significantly reduce magnetic leakage, lower the power loss of the mechanism, and improve the adaptability of the mechanism. There is a rotational speed difference between the input shaft 1 and the output shaft 2. By adjusting the axial position of the outer yoke iron disk 3 on the input shaft 1 through the first adjustment component 10, the coupling area between the outer permanent magnet 8 and the inner permanent magnet 9 can be changed, thereby changing the rotational speed difference and achieving contactless speed regulation between the input shaft 1 and the output shaft 2. When the electromagnet 6 controls the inner yoke iron disk 4 to slide and connect to the output shaft 2, and the conductor disk 5 is adjusted through the second adjustment component 11 so that the conductor disk 5 slides to the conductor disk sleeve 7, the conductor disk 5 and the conductor disk sleeve 7 remain relatively stationary. The input shaft 1 drives the outer yoke iron disk 3 to rotate. Due to the interaction between the outer permanent magnet 8 and the inner permanent magnet 9, the inner yoke iron disk 4 is driven to rotate, and the inner yoke iron disk 4 drives the output shaft 2 to rotate. The conductor disk 5 and the conductor disk sleeve 7 remain relatively stationary, thus achieving contactless constant-speed transmission between the input shaft 1 and the output shaft 2. At this time, the permanent magnet drive mechanism is in the coupling working state. For details, please refer to Figure 3 。The permanent magnet drive mechanism of the present invention can achieve contactless differential transmission between the input shaft 1 and the output shaft 2, and the differential value is adjustable. It can also achieve contactless constant-speed transmission between the input shaft 1 and the output shaft 2, playing the role of vibration isolation and overload protection, and improving the adaptability of the permanent magnet drive mechanism.

[0033] Among them, the number of both the outer permanent magnets 8 and the inner permanent magnets 9 is 2N, where N is a natural number greater than 0. The outer permanent magnets 8 are circumferentially evenly distributed around the axis of the outer yoke iron disk 3, and the inner permanent magnets 9 are circumferentially evenly distributed around the axis of the inner yoke iron disk 4. The magnetic poles of adjacent outer permanent magnets 8 on the side facing the conductor disk 5 are opposite, and the magnetic poles of adjacent inner permanent magnets 9 on the side facing the conductor disk 5 are opposite. And along the radial direction, the magnetic poles of the outer permanent magnets 8 and the inner permanent magnets 9 on both sides of the conductor disk 5 are opposite. The magnetic lines of force pass through the conductor disk 5 from the N pole of the outer permanent magnet 8, enter the S pole of the inner permanent magnet 9 and exit from the N pole and enter the S pole of the adjacent inner permanent magnet 9, and exit from its N pole and enter the S pole of the adjacent outer permanent magnet 8, and exit from the N pole of the adjacent outer permanent magnet 8 and return to the S pole of the outer permanent magnet 8 to form an effective magnetic circuit. In this specific embodiment, the number of both the outer permanent magnets 8 and the inner permanent magnets 9 is 10. In practical applications, the number of the outer permanent magnets 8 and the inner permanent magnets 9 can also be reasonably set according to the specifications of the permanent magnet drive mechanism to improve the flexibility of the mechanism.

[0034] Specifically, the first adjustment component 10 and the second adjustment component 11 have the same structure. Both of them include a mounting bracket 12, a driving motor 13, and an adjustment bracket 14. The mounting bracket 12 is fixed to the support unit. The driving motor 13 is arranged on the mounting bracket 12. The adjustment bracket 14 is slidably connected to the mounting bracket 12. The adjustment bracket 14 is connected to the outer yoke iron disk 3 and the conductor disk 5. The driving motor 13 is drivingly connected to the adjustment bracket 14. The driving motor 13 can be a servo motor. By using the driving motor 13 to drive the adjustment bracket 14 to slide relative to the mounting bracket 12, the purpose of driving the outer yoke iron disk 3 and the conductor disk 5 to slide by using the adjustment bracket 14 is realized. It should be explained here that the adjustment bracket 14 is connected to the outer yoke iron disk 3 and the conductor disk 5, which means that both the outer yoke iron disk 3 and the conductor disk 5 are connected with the adjustment bracket 14, rather than one adjustment bracket 14 being simultaneously connected to both the outer yoke iron disk 3 and the conductor disk 5.

[0035] In this specific embodiment, both the outer yoke iron disk 3 and the conductor disk 5 have insertion blocks 15. The adjustment bracket 14 has a slot 16 adapted to the insertion block 15. The slot 16 is inserted and connected with the insertion block 15, which is convenient for installation. The slot 16 is U-shaped, and the length direction of the slot 16 is perpendicular to the axis direction of the input shaft 1, which can avoid loosening while ensuring smooth sliding.

[0036] In other specific embodiments of the present invention, the mounting bracket 12 is connected with a roller 17. The roller 17 is rotatably arranged on the mounting bracket 12. The adjustment bracket 14 abuts against the outer peripheral surface of the roller 17. The roller 17 can support the adjustment bracket 14 and reduce the sliding resistance of the adjustment bracket 14. The output end of the driving motor 13 is connected with a transmission gear 18. The adjustment bracket 14 is connected with a transmission rack 19. The transmission gear 18 meshes with the transmission rack 19. The adjustment bracket 14 is driven to slide by using the transmission gear 18 and the transmission rack 19. Other transmission structures can also be selected in practical applications.

[0037] More specifically, the electromagnet 6 is connected to an external power supply by a slip ring 20. The slip ring 20 is arranged on the outer yoke iron disk 3, which reduces the wiring difficulty. By controlling the current direction of the electromagnet 6, the polarity of the electromagnet 6 is controlled, so that an attractive force or a repulsive force is presented between the electromagnet 6 and the inner permanent magnet 9 on the inner yoke iron disk 4, and then the axial movement of the inner yoke iron disk 4 is controlled. It should be noted here that the gap between the input shaft 1 and the output shaft 2 is smaller than the axial length of the inner yoke iron disk 4 to avoid the inner yoke iron disk 4 from slipping off.

[0038] Among them, the outer yoke iron disk 3 is slidably connected to the input shaft 1 by a spline. The inner yoke iron disk 4 is connected to the input shaft 1 and the output shaft 2 by a spline. The conductor disk 5 is connected to the output shaft 2 and the conductor disk sleeve 7 by a spline. The spline connection is adopted to ensure the smooth transmission of torque without affecting the sliding.

[0039] It should also be noted that the support unit includes a bottom plate 23, an input shaft support 21 and an output shaft support 22 provided on the bottom plate 23. The input shaft 1 is rotatably provided on the input shaft support 21, and the output shaft 2 is rotatably provided on the output shaft support 22. The input shaft support 21 and the output shaft support 22 provide stable support for the input shaft 1 and the output shaft 2. Bearings are provided between the input shaft 1 and the input shaft support 21 and between the output shaft 2 and the output shaft support 22. A bearing is provided between the conductor disk sliding sleeve 7 and the output shaft 2 to ensure smooth rotation of each component.

[0040] In other specific embodiments of the present invention, both the input shaft support 21 and the output shaft support 22 are detachably connected to the bottom plate 23, which is convenient for installation. Moreover, the connection positions of the input shaft support 21 and the output shaft support 22 with the bottom plate 23 can be adjusted, and the gap between the input shaft 1 and the output shaft 2 can be finely adjusted by using the input shaft support 21 and the output shaft support 22, reducing the assembly difficulty of the mechanism.

[0041] Furthermore, the conductor disk 5 includes a web 501, an inner disk 502 and an outer disk 503. The web 501 can be slidably connected to the output shaft 2 and the conductor disk sliding sleeve 7. The outer disk 503 is connected to the web 501. The inner disk 502 is embedded on the outer disk 503. The number of the inner disks 502 is multiple, and the inner disks 502 are circumferentially evenly distributed around the axis of the outer disk 503, and there is a gap between adjacent inner disks 502. The inner disks 502 and the web 501 are made of steel, and the outer disk 503 is made of copper. When the permanent magnet transmission mechanism is in the working state of the transmission, because the conductivity of the steel material is smaller than that of the copper, and with the reasonable structural size design of the inner disk 502 and the outer disk 503 of the conductor disk 5, the induced eddy current mainly exists in the outer disk 503 made of copper material, forcing the induced eddy current to flow more along the axial path and only flowing tangentially at the end of the outer disk 503 to form an eddy current loop. According to the left-hand rule, for the tubular permanent magnet speed regulator, only when the induced eddy current flows axially can it contribute to the torque, so the torque density is increased. When the permanent magnet transmission mechanism is in the working state of the coupling, because the relative magnetic permeability of the steel material is much larger than that of the copper material and the air, when the magnetic field lines of the outer permanent magnet 8 pass through the conductor disk 5 and enter the inner permanent magnet 9, the inner disks 502 in the conductor layer between the two will guide the magnetic field lines to pass through, reducing the magnetic leakage, playing a role in magnetic field modulation, and thus reducing the power loss of the permanent magnet coupling.

[0042] The present invention can achieve non-contact differential transmission between the input shaft 1 and the output shaft 2, and the differential value is adjustable. It can also achieve non-contact constant-speed transmission between the input shaft 1 and the output shaft 2, playing a role in vibration isolation and overload protection, and improving the adaptability of the permanent magnet transmission mechanism.

[0043] In the present invention, specific examples are used to illustrate the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A permanent magnet drive mechanism, characterized in that, it comprises: a support unit; an input-output unit, the input-output unit includes an input shaft and an output shaft with a gap therebetween, and both the input shaft and the output shaft are rotatably arranged on the support unit; a transmission unit, the transmission unit includes an outer yoke iron disk, an inner yoke iron disk, a conductor disk, an electromagnet and a conductor disk sliding sleeve, the outer yoke iron disk is slidably arranged on the input shaft, and the input shaft can drive the outer yoke iron disk to rotate, an outer permanent magnet is arranged on the inner wall of the larger-diameter end of the outer yoke iron disk, the outer yoke iron disk is connected with a first adjustment component, the first adjustment component can drive the outer yoke iron disk to slide reciprocally, and the first adjustment component is connected with the support unit; the inner yoke iron disk can slide reciprocally between the input shaft and the output shaft, when the inner yoke iron disk slides to be connected with the input shaft, the input shaft can drive the inner yoke iron disk to rotate, when the inner yoke iron disk slides to be connected with the output shaft, the inner yoke iron disk can drive the output shaft to rotate, an inner permanent magnet is arranged on the outer wall of the inner yoke iron disk, the inner yoke iron disk can extend into the larger-diameter end of the outer yoke iron disk, the electromagnet is arranged on the input shaft, the electromagnet is connected with an external power supply, and the electromagnet can drive the inner yoke iron disk to slide; the output shaft is a stepped shaft, the conductor disk sliding sleeve is rotatably sleeved on the output shaft, the conductor disk can slide between the output shaft and the conductor disk sliding sleeve, when the conductor disk slides to be connected with the output shaft, the conductor disk can drive the output shaft to rotate, when the conductor disk slides to be connected with the conductor disk sliding sleeve, the conductor disk and the conductor disk sliding sleeve remain relatively stationary, the larger-diameter end of the conductor disk can extend between the outer permanent magnet and the inner permanent magnet, the conductor disk is connected with a second adjustment component, the second adjustment component can drive the conductor disk to slide reciprocally, and the second adjustment component is connected with the support unit.

2. The permanent magnet drive mechanism according to claim 1, characterized in that: the number of both the outer permanent magnet and the inner permanent magnet is 2N, where N is a natural number greater than 0, the outer permanent magnets are circumferentially evenly distributed around the axis of the outer yoke iron disk, the inner permanent magnets are circumferentially evenly distributed around the axis of the inner yoke iron disk, the magnetic poles of adjacent outer permanent magnets facing the conductor disk side are opposite, the magnetic poles of adjacent inner permanent magnets facing the conductor disk side are opposite, and along the radial direction, the magnetic poles of the outer permanent magnets and the inner permanent magnets on both sides of the conductor disk are opposite.

3. The permanent magnet drive mechanism according to claim 1, characterized in that: the first adjustment component and the second adjustment component have the same structure, and both include a mounting bracket, a driving motor and an adjustment bracket, the mounting bracket is fixed on the support unit, the driving motor is arranged on the mounting bracket, the adjustment bracket is slidably connected with the mounting bracket, the adjustment bracket is connected with the outer yoke iron disk and the conductor disk, and the driving motor is in transmission connection with the adjustment bracket.

4. The permanent magnet drive mechanism according to claim 3, characterized in that: both the outer yoke iron disc and the conductor disc have insertion blocks, the adjusting bracket has slots adapted to the insertion blocks, and the slots are inserted and connected with the insertion blocks.

5. The permanent magnet drive mechanism according to claim 3, characterized in that: The mounting bracket is connected with rollers, the rollers are rotatably arranged on the mounting bracket, and the adjusting bracket abuts against the outer peripheral surface of the rollers; the output end of the driving motor is connected with a transmission gear, the adjusting bracket is connected with a transmission rack, and the transmission gear meshes with the transmission rack.

6. The permanent magnet drive mechanism according to claim 1, characterized in that: The electromagnet is connected to an external power supply by a slip ring, and the slip ring is arranged on the outer yoke iron disc.

7. The permanent magnet drive mechanism according to claim 1, characterized in that: The outer yoke iron disc is slidably connected to the input shaft by a spline, the inner yoke iron disc is connected to the input shaft and the output shaft by a spline, and the conductor disc is slidably sleeved with the output shaft and the conductor disc by a spline.

8. The permanent magnet drive mechanism according to claim 1, characterized in that: The support unit includes a bottom plate and an input shaft support and an output shaft support arranged on the bottom plate. The input shaft is rotatably arranged on the input shaft support, the output shaft is rotatably arranged on the output shaft support, bearings are arranged between the input shaft and the input shaft support and between the output shaft and the output shaft support, and a bearing is arranged between the conductor disc sleeve and the output shaft.

9. The permanent magnet drive mechanism according to claim 8, characterized in that: Both the input shaft support and the output shaft support are detachably connected to the bottom plate, and the connection positions of the input shaft support and the output shaft support to the bottom plate can be adjusted.

10. The permanent magnet drive mechanism according to any one of claims 1-9, characterized in that: The conductor disc includes a web, an inner disc and an outer disc. The web can be slidably connected to the output shaft and the conductor disc sleeve. The outer disc is connected to the web. The inner disc is embedded on the outer disc. The number of the inner discs is multiple. The inner discs are circumferentially distributed uniformly around the axis of the outer disc, and there is a gap between adjacent inner discs. The inner disc and the web are made of steel, and the outer disc is made of copper.

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