A disc-type torque-limiting synchronous permanent magnet coupling

Abstract

The present invention relates to the field of couplings, and specifically to a disc-type torque-limiting synchronous permanent magnet coupling, comprising an outer rotor component and an inner rotor component; the outer rotor component comprises an input choke disk and an output choke disk; the inner rotor component comprises a connecting shaft, on which a magnetic disk mechanism is sleeved; the input choke disk and the output choke disk are distributed on both sides of the magnetic disk mechanism; the input choke disk and the output choke disk are provided with an external magnetic portion; the present invention discloses a synchronous permanent magnet coupling with a disc structure, in which the inner rotor component and the outer rotor component of the present invention are magnetized along the axial direction of the coupling, which can avoid radial magnetization between the inner rotor component and the outer rotor component; furthermore, the permanent magnet coupling disclosed in the present invention has no additional radial force on the equipment, and will not cause equipment vibration or shaft bending and twisting.

Description

Technical Field

[0001] The invention relates to the field of couplings, in particular to a disc-type torque-limiting synchronous permanent magnet coupling. Background Art

[0002] Synchronous permanent magnet couplings achieve contactless torque transmission through the force of attraction between like poles and repulsion between opposite poles between permanent magnets of the master and slave rotors, and have been widely used in the field of magnetic pumps.

[0003] The synchronous permanent magnet coupling disclosed in Chinese invention patents (authorization publication numbers: CN104038020B and CN109600016B) consists of an outer permanent magnet rotor component and an inner permanent magnet rotor component. The outer permanent magnet rotor component's magnetic tiles are radially magnetized, with adjacent tiles of opposite polarity tightly mounted on the inner circumference of an outer steel cylinder. The inner permanent magnet rotor component's magnetic tiles are radially magnetized, with adjacent tiles of opposite polarity tightly mounted on the outer circumference of the inner steel cylinder, with an air gap between the inner and outer permanent magnet rotor components. This synchronous permanent magnet coupling structure, due to the inevitable concentricity deviation between the inner and outer rotors, causes additional radial forces acting on the equipment shaft, resulting in vibration, bending and torsion, and even breakage. Furthermore, overload can cause loss of step, generating eddy current heat in the magnets and leading to magnet demagnetization.

[0004] Therefore, in order to avoid the above technical problems, it is necessary to optimize the design of the existing coupling structure. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a synchronous permanent magnetic coupling structure that avoids radial force generated by magnetization.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A disc-type torque-limiting synchronous permanent magnet coupling comprises an outer rotor component and an inner rotor component; the outer rotor component comprises an input choke disc and an output choke disc; the inner rotor component comprises a connecting shaft, on which a magnetic disk mechanism is sleeved; the input choke disc and the output choke disc are distributed on both sides of the magnetic disk mechanism; the input choke disc and the output choke disc are provided with external magnetic parts; the magnetic disk mechanism comprises two permanent magnetic disks sleeved on the connecting shaft; the permanent magnetic disks are provided with internal magnetic parts; the connecting shaft is provided with at least one flat section; the permanent magnetic disk is provided with a sleeve hole adapted to the connecting shaft.

[0008] The external magnetic part includes an externally connected aluminum disk arranged on the input end choke disk or the output end choke disk, and a magnet group is arranged inside the externally connected aluminum disk; the internal magnetic part includes an internally connected aluminum disk arranged on the permanent magnet disk, and a magnet group is arranged on the internally connected aluminum disk.

[0009] The magnet group includes a plurality of magnet blocks; the plurality of magnet blocks are sequentially and adjacently distributed in a ring; and the magnetic poles of adjacent magnet blocks are distributed in opposite directions.

[0010] The magnet blocks in each magnet group are symmetrically distributed.

[0011] Each of the magnet blocks includes a block body, which has a lower end face, an upper end face and a connecting side face; the lower end face is connected to the upper end face through the connecting side face; the connecting side face includes a first side face, a second side face, a third side face and a fourth side face; the first side face, the second side face, the third side face and the fourth side face are connected end to end in sequence; the lower end face is arranged opposite to the upper end face; the first side face and the third side face are arranged opposite to each other, and the second side face and the fourth side face are arranged opposite to each other; the lower end face, the first side face and the third side face are arranged opposite to each other; the lower end face, the first side face and the third side face are planar structures.

[0012] The first side surface is symmetrically arranged with the third side surface, and the first side surface and the third side surface are arranged obliquely; and the plane of the first side surface intersects with the plane of the second side surface.

[0013] The second side surface and the fourth side surface are arc-shaped surfaces.

[0014] A flexible dustproof ring is provided between the output end choke disc and the connecting shaft.

[0015] The input end choke disk and the output end choke disk are connected via a plurality of connecting plates; the plurality of connecting plates are distributed in a ring-shaped area between the input end choke disk and the output end choke disk.

[0016] The side surfaces of adjacent connecting plates are in contact with each other.

[0017] The advantages of the present invention are:

[0018] The present invention discloses a disc-type torque-limiting synchronous permanent magnet coupling. First, the present invention discloses a disc-type synchronous permanent magnet coupling, that is, the inner rotor component and the outer rotor component of the present invention are arranged longitudinally, and the inner rotor component and the outer rotor component of the present invention are magnetized along the axial direction of the coupling, which can avoid radial magnetization between the inner rotor component and the outer rotor component. Furthermore, the permanent magnet coupling disclosed by the present invention has no additional radial force on the equipment, and will not cause equipment vibration or shaft bending and torsion. At the same time, the present invention is arranged with two permanent magnet disks. When the equipment is overloaded, the permanent magnet disks can move laterally along the connecting shaft, automatically increasing the air gap of the coupling itself, cutting off power transmission, stopping the load, and idling the motor, thereby realizing a protection function. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following is a brief description of the contents and symbols in the drawings of the present invention:

[0020] Figure 1 A schematic structural diagram of the present invention

[0021] Figure 2 This is a structural diagram after overload protection of the present invention;

[0022] Figure 3 This is a schematic diagram of the arrangement of rectangular magnets used in the torque-limiting synchronous permanent magnet coupling of the present invention;

[0023] Figure 4 This is a schematic diagram of the arrangement of sector magnets used in the torque-limiting synchronous permanent magnet coupling of the present invention;

[0024] Figure 5 This is a schematic diagram of the arrangement of trapezoidal magnets used in the torque-limiting synchronous permanent magnet coupling of the present invention;

[0025] Figure 6 A side view of the connecting shaft of the torque-limiting synchronous permanent magnet coupling of the present invention having two planar sections;

[0026] Figure 7 A side view of the connecting shaft of the torque-limiting synchronous permanent magnet coupling of the present invention having four plane sections;

[0027] Figure 8 It is the three-dimensional structure of a single magnet block in the present invention.

[0028] The marks in the above figure are:

[0029] 1. Outer rotor components; 11. Input flange; 12. Input choke disk; 13. Magnet; 14. Permanent magnetic disk; 15. Connecting plate; 16. Output choke disk; 17. Flexible dust ring; 2. Inner rotor components; 21. Output flange; 22. Connecting shaft; 23. Permanent magnetic disk; 24. Back choke; 25. Baffle, 3. Air gap. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention will be further explained in detail below by describing the best embodiment with reference to the accompanying drawings.

[0031] A disc-type torque-limiting synchronous permanent magnet coupling comprises an outer rotor component 1 and an inner rotor component 2; the outer rotor component 1 comprises an input-end choke disk 12 and an output-end choke disk 16; the inner rotor component 2 comprises a connecting shaft 22, on which a magnetic disk mechanism is sleeved; the input-end choke disk 12 and the output-end choke disk 16 are distributed on both sides of the magnetic disk mechanism; the input-end choke disk 12 and the output-end choke disk 16 are provided with an external magnetic portion 1-1; the magnetic disk mechanism comprises two permanent magnetic disks 23 sleeved on the connecting shaft 22; the permanent magnetic disk 23 is provided with an inner magnetic portion 2-1; the connecting shaft 22 is provided with at least one flat section 221; the permanent magnetic disk 23 is provided with a sleeve hole adapted to the connecting shaft 22; The present invention discloses a disc-type torque-limiting synchronous permanent magnet coupling. First, the present invention discloses a disc-type synchronous permanent magnet coupling, that is, the inner rotor component 2 and the outer rotor component 1 of the present invention are arranged longitudinally, and the inner rotor component 2 and the outer rotor component 1 of the present invention are magnetized along the axial direction of the coupling, which can avoid radial magnetization between the inner rotor component 2 and the outer rotor component 1. Furthermore, the permanent magnet coupling disclosed in the present invention does not add any radial force to the equipment, and will not cause equipment vibration or shaft bending and torsion. At the same time, the present invention is arranged with two permanent magnet disks 23. When the equipment is overloaded, the permanent magnet disks 23 can move laterally along the connecting shaft 22, automatically increasing the coupling's own air gap 3, cutting off power transmission, stopping the load, and idling the motor, thereby realizing a protective function.

[0032] Specifically, the permanent magnet coupling disclosed in the present invention mainly includes an outer rotor component 1 and an inner rotor component 2; the present invention realizes power transmission through the mutual rotation of the outer rotor component 1 and the inner rotor component 2; specifically, in the present invention, the outer rotor component 1 includes an input end choke disk 12 and an output end choke disk 16; the inner rotor component 2 includes a connecting shaft 22, and the connecting shaft 22 is provided with a magnetic disk mechanism; the input end choke disk 12 and the output end choke disk 16 are distributed on both sides of the magnetic disk mechanism; the input end choke disk 12 and the output end choke disk 16 are provided with an external magnetic part 1-1; the magnetic disk mechanism of the present invention, the internal magnetic part 2-1 described below, the input end choke disk 12, the output end choke disk 16 and the external magnetic part 1-1 cooperate with each other to realize power transmission from the inner rotor component 2 to the outer rotor component, or power transmission from the outer rotor component 1 to one side of the inner rotor component 2. In other words, the synchronous coupling disclosed in the present invention can be used as a driving or driven part on both sides, and can be selected according to needs.

[0033] In addition, the magnetic disk mechanism of the present invention includes two permanent magnetic disks 23 sleeved on the connecting shaft 22; the permanent magnetic disks 23 are provided with an inner magnetic part 2-1; the present invention sets two permanent magnetic disks 23 on the connecting shaft 22; the size of the power transmitted by the coupling can be changed during actual use.

[0034] In addition, at least one flat section 221 is provided on the connecting shaft 22 of the present invention. Here, the provision of the flat section 221 makes the connecting shaft 22 not a cylindrical structure. Such a provision well ensures the linkage of the rotation of the permanent magnetic disk 23 and the connecting shaft 22; it is convenient for the permanent magnetic disk 23 to subsequently drive the connecting shaft 22 to rotate, and vice versa. At the same time, in order to prevent the connecting shaft 22 from rotating relative to the permanent magnetic disk 23, in the present invention, the connecting shaft 22 can be a quadrangular prism structure, that is, the connecting shaft 22 has four flat sections 221; or two flat sections 221 can be provided, and the two flat sections 221 are symmetrically distributed on both sides of the connecting shaft 22. Such a provision can well ensure the stability of the connection between the connecting shaft 22 and the permanent magnetic disk 23 and prevent the permanent magnetic disk 23 from rotating relative to the connecting shaft 22. At the same time, in order to ensure the fit between the permanent magnetic disk 23 and the connecting shaft 22, the present invention requires that the sleeve hole on the permanent magnetic disk 23 has the same cross-sectional shape as the corresponding connecting shaft 22; that is, the sleeve hole on the permanent magnetic disk 23 is compatible with the connecting shaft 22.

[0035] Furthermore, in the present invention, the external magnetic part 1-1 includes an externally connected aluminum disk arranged on the input end choke disk 12 or the output end choke disk 16, and a magnet group is provided in the externally connected aluminum disk; the present invention can increase the power transmission efficiency between the outer rotor component 1 and the inner rotor component 2 by optimizing the external magnetic part 1-1 on the input end choke disk 12 and the output end choke disk 16; the internal magnetic part 2-1 includes an internally connected aluminum disk arranged on the permanent magnetic disk 23, and a magnet group is provided on the internally connected aluminum disk; in addition, in the present invention, through the arrangement of the externally connected aluminum disk and the internally connected aluminum disk; it can be more convenient to assemble and connect the magnet group, and facilitate the subsequent installation of different types of magnet blocks 13 as needed.

[0036] Specifically, in the present invention, the magnet group includes a plurality of magnet blocks 13; the plurality of magnet blocks 13 are arranged in an adjacent ring in sequence; the magnetic poles of adjacent magnet blocks 13 are distributed in opposite directions; such an arrangement enables the outer magnetic portion 1-1 of the outer rotor component 1 to interact with the inner magnetic portion 2-1 on the inner rotor component 2 to achieve contactless torque transmission; at the same time, the outer magnetic portion 1-1 and the inner magnetic portion 2-1 of the present invention can be arranged with the same type of magnet block 13, which reduces the types of magnet blocks 13, increases the versatility of the components, and reduces the production cost of the synchronous coupling to a certain extent.

[0037] Furthermore, in the present invention, the magnet blocks 13 in each magnet group are symmetrically distributed; such an arrangement can reduce or increase the magnet blocks 13 of the magnet group disclosed in the present invention in pairs, so as to adapt to the torque requirements of different equipment and increase the scope of application of the magnet group of the present invention to a certain extent.

[0038] Furthermore, in the present invention, each of the magnet blocks 13 includes a block body, which has a lower end face 131, an upper end face 132 and a connecting side face; the lower end face 131 is connected to the upper end face 132 through the connecting side face; the connecting side face includes a first side face 133, a second side face 134, a third side face 135 and a fourth side face 136; the first side face 133, the second side face 134, the third side face 135 and the fourth side face 136 are connected end to end in sequence; the lower end face 131 is arranged opposite to the upper end face 132; the first side face 133 and the third side face 135 are arranged opposite to each other, and the second side face 134 and the fourth side face 136 are arranged opposite to each other; the lower end face 131, the first side face 133 and the third side face 135 are planar structures; the present invention facilitates the subsequent assembly of each magnet block 13 through such a structural design ; The above-mentioned lower end face 131, upper end face 132 and connecting side face of the present invention are based on the top view as the reference standard, and are described with one of the permanent magnetic disk 23, the input end choke disk 12 and the output end choke disk 16 as the basic reference surface; during the actual assembly and connection, the lower end face 131 of the magnet block 13 is connected to the bottom surface of the external connecting aluminum disk or the internal connecting aluminum disk, and the magnet block 13 is generally embedded in the corresponding connecting aluminum disk; in addition, the first side face 133 and the third side face 135 of the present invention are on both sides of the magnet block 13, which is convenient for subsequent fitting or mutual calibration with adjacent magnet blocks 13; it is convenient for the installation and positioning of the magnet block 13; at the same time, in order to avoid installation interference between the magnet block 13 and adjacent components due to the protrusions on the magnet block 13, the first side face 133, the second side face 134 and the lower end face 131 in the present invention are planar structures.

[0039] At the same time, when the lower end face 131, the upper end face 132, the first side face 133, the second side face 134, the third side face 135 and the fourth side face 136 are all planar structures, and the relative end faces are arranged parallel to each other, the structure of the magnet block 13 is a rectangular block structure; that is, the horizontal projection of the magnet block 13 in the present invention is rectangular; based on such a setting, the side faces of the magnet block 13 in the present invention are all flat, one function is to reduce the use of materials, and the other function is to increase its versatility. In actual assembly, it is only necessary to require that the polarity arrangements of adjacent magnet blocks 13 are opposite, as shown in the accompanying drawings; the magnet block with a rectangular structure in the present invention has high raw material utilization and low cost, and the torque transmission capacity can be changed by changing the number of installations, and has good versatility.

[0040] Furthermore, in the present invention, the first side surface 133 and the third side surface 135 are symmetrically arranged, and the first side surface 133 and the third side surface 135 are arranged at an angle; and the plane of the first side surface 133 and the plane of the second side surface 134 are arranged to intersect; the present invention is based on such a structural design, so that the magnet block 13 disclosed in the present invention is equivalent to a trapezoidal block structure, and the magnet block 13 of the present invention is based on such a structural design. Through such a structural design, the present invention can arrange the various magnet blocks 13 closely when actually arranging the magnet group; the closely arranged torque transmission capacity is greater, and there is no blank area between the magnets.

[0041] Furthermore, in the present invention, the second side surface 134 and the fourth side surface 136 are arc-shaped surfaces; such a setting makes the magnet block of the present invention equivalent to a fan-shaped block structure with raised inner and outer sides. Based on such a structural design, the present invention can realize the magnetic focusing arrangement of the magnet blocks 13 in each magnet group of the present invention; it can also be a tightly arranged one; there is no gap between the magnet blocks of the fan-shaped structure, and there is a triangular blank area between the magnets of the rectangular magnet, so when the magnets are arranged with the same diameter, the fan-shaped structure has the largest magnet area and greater torque transmission capacity.

[0042] The present invention can optimize the magnetization effect of the magnet group by setting the above-mentioned magnet blocks 13, and can reduce the types of magnet blocks 13 required to form the corresponding magnet group by limiting the structure and arrangement of the magnet blocks 13; thereby reducing the types of magnet blocks 13, which can not only reduce the cost of synchronous coupling components, but also improve assembly efficiency; specifically, the coupling disclosed in the present invention uses only one type of magnet block 13, which can increase the versatility of the magnet block 13, reduce the use of materials, and reduce product costs; at the same time, in the present invention, adjacent magnet blocks 13 can be arranged in a fitting or non-fitting manner as needed, which can avoid the problem of requiring two magnet blocks 13 when opposite polarity arrangements are required; in other words, the present invention greatly reduces the variety and quantity of magnet blocks 13 in stock by limiting the structure of the magnet blocks 13, thereby indirectly reducing product costs.

[0043] Furthermore, in the present invention, a flexible dust ring 17 is provided between the output end choke plate 16 and the connecting shaft 22; the setting of the flexible dust ring 17 plays a good blocking role; it prevents external debris from entering the interior of the coupling through the gap between the output end choke plate 16 and the connecting shaft 22; in addition, in the present invention, the flexible dust ring 17 can be a rubber ring or other sealing structure.

[0044] Furthermore, the input-end choke disk 12 and the output-end choke disk 16 described in the present invention are connected by multiple connecting plates 15; the multiple connecting plates 15 are distributed in a ring-shaped area between the input-end choke disk 12 and the output-end choke disk 16; the present invention facilitates the connection and assembly between the input-end choke disk 12 and the output-end choke disk 16 through the provision of the connecting plates 15, thereby ensuring the integrity of the input-end choke disk 12 and the output-end choke disk 16; in addition, the connecting plates 15 disclosed in the present invention also serve as positioning members during the subsequent assembly of the permanent magnet coupling, thereby facilitating the connection and assembly between the outer rotor component 1 and the inner rotor component 2.

[0045] Furthermore, in the present invention, the side surfaces of adjacent connecting plates 15 are fitted together; such an arrangement enables the plurality of connecting plates 15 to form an annular closed space, which, in conjunction with the flexible dust ring 17 mentioned above, can realize that the internal cavity formed by the outer rotor component 1 and the inner rotor component 2 is similar to a sealing structure, thereby preventing external debris from entering the interior of the coupling and affecting the normal operation of the coupling.

[0046] An assembly method for the disc-type torque-limiting synchronous permanent magnet coupling, the assembly method comprising the following steps:

[0047] Step 1: First, use standard parts to assemble the outer rotor component 1 and the inner rotor component 2 respectively; after the outer rotor component 1 and the inner rotor component 2 are assembled, perform dynamic balancing checks on the outer rotor component 1 and the inner rotor component 2 respectively;

[0048] Step 2: After completing step 1, disassemble and assemble the outer rotor component 1. First, remove the output choke plate 16 of the outer rotor component 1. At the same time, retain at least three connecting plates 15 on the input choke plate 12. After completing the above operations, transfer the remaining outer rotor components and place them on a workbench. The input choke plate 12 should be placed close to the workbench, that is, the input choke plate 12 should be at the bottom and the connecting plates 15 should be at the top.

[0049] Step 3: After step 2 is completed, place a non-magnetic pad on the external connection aluminum disk on the input end choke disk 12;

[0050] Step 4: After completing step 3, hoist the inner rotor component 2 into the circular cavity formed by the remaining connecting plates 15 in step 2. The end of the inner rotor component 2 connected to the output flange 21 must be at the top. During hoisting and installation, the inner rotor component 2 must be lowered until the permanent magnetic disk 23 on the side of the inner rotor component 2 close to the input choke disk 12 falls on the non-magnetic pad installed in step 2.

[0051] Step 5: After step 4 is completed, the output choke plate 16 removed in step 2 is reinstalled on the input choke plate 12;

[0052] Step 6: After completing Step 5, place another set of non-magnetic backing plates on the inner connecting aluminum plate of the permanent magnet disk 23 on the side of the inner rotor component 2 near the output end choke disk 16. Then, push the permanent magnet disk 23 on the side of the inner rotor component 2 near the output end choke disk 16 upward until the non-magnetic backing plates on the permanent magnet disk 23 are in contact with the outer connecting aluminum plate inside the output end choke disk 16.

[0053] Step 7: After step 6 is completed, install the flexible dust ring 17 between the output end choke plate 16 and the connecting shaft 22;

[0054] Step 8: After step 7 is completed, install the remaining connecting plate 15;

[0055] Step 9: After completing step 8, a permanent magnet coupling is assembled. If you need to assemble a new disc-type torque-limiting synchronous permanent magnet coupling, repeat steps 1 to 8 above.

[0056] Through the disclosure of the above assembly arrangement, the present invention can realize the assembly between the outer rotor component 1 and the inner rotor component 2, and then realize the assembly of the entire coupling.

[0057] specific;

[0058] The assembly steps are as follows:

[0059] Step 1: First, select qualified parts to assemble the outer rotor component 1 and the inner rotor component 2 respectively; after the outer rotor component 1 and the inner rotor component 2 are assembled, perform dynamic balancing checks on the outer rotor component 1 and the inner rotor component 2 respectively;

[0060] Step 2: Perform final assembly of the coupling. First, remove the connecting bolts between the output-end choke plate 16 and the connecting plate 15 of the outer rotor component 1, and remove the output-end choke plate 16 and the external magnetic group on the output-end choke plate 16. Then, remove some of the connecting plates 15, leaving at least three connecting plates 15, and require that the remaining connecting plates 15 tend to be evenly spaced and distributed in an annular pattern. Then, place the remaining parts of the outer rotor component 1 after the above disassembly and assembly on a workbench, requiring that the input-end choke plate 12 be at the bottom and the connecting plates 15 be arranged longitudinally, that is, the connecting plates 15 are above the input-end choke plate 12.

[0061] Step 3: Place several non-magnetic pads of similar (the same) thickness as the initially set air gap 3 along the circumferential edge of the external connecting aluminum disk on the input end choke disk 12 of step 2 to isolate the magnet group in the outer rotor component 1 from the magnet group in the inner rotor component 2. Then, hoist the inner rotor component 2 into the circular cavity formed by the remaining connecting plates 15 of step 1. The inner rotor component 2 must be hoisted in the longitudinal direction. For reference, the output flange 21 connected to the inner rotor component 2 is at the top, and the corresponding permanent magnetic disk 23 baffle 25 is at the bottom. The inner rotor component 2 must be aligned with the above circular cavity. Drop the inner rotor component 2 until the lower permanent magnetic disk 23 in the inner rotor component 2 placed in the longitudinal direction lands on the above non-magnetic pads. Due to weight, the upper disk also lands at the bottom, and the chokes on the two permanent magnetic disks 23 are close together.

[0062] Step 4: Install the output choke plate 16 and the external magnetic portion 1-1 removed in Step 2 back onto the input choke plate 12 to form the outer rotor component 1. Specifically, after connecting the external magnetic portion 1-1 to the output choke plate 16, the output choke plate 16 connected to the external magnetic portion 1-1 is then connected to the other end of the connecting plate 15. Finally, the outer rotor component 1 is formed.

[0063] Step 5: After Step 4 is completed, a plurality of non-magnetic pads having a thickness similar to (or the same as) the set air gap 3 are placed on the circumferential edge of the upper magnetic disk (near the output choke disk 16) in the inner rotor component 2; the upper magnetic disk of the inner rotor is then pushed upward until the non-magnetic pads contact the output choke disk, specifically the outer magnetic portion 1-1 on the output choke disk.

[0064] Step 6: Install the flexible dust ring 17;

[0065] Step 7: Install the remaining connecting plates 15; now the assembly of a disc-type synchronous permanent magnet coupling is complete.

[0066] The present invention discloses a torque-limiting synchronous permanent magnet coupling, comprising an outer rotor component 1 and an inner rotor component 2 mounted coaxially, wherein an input choke plate 12 and an output choke plate 16 in the outer rotor component 1 are connected as a whole via a connecting plate 15, and an external magnetic portion 1-1 is provided on the inner side of the opposing surfaces of the input choke plate 12 and the output choke plate 16; specifically, the coupling comprises an outer connecting aluminum plate, within which a magnet group is provided, the magnet group comprising a plurality of magnet blocks 13; in addition, in the present invention, the inner rotor component 2 comprises a connecting shaft 22, on which a permanent magnet disk 23 is provided, on which an inner magnetic portion 2-1 is provided, the inner magnetic portion 2-1 comprising a magnet group provided on the outer connecting aluminum plate; The inner connected aluminum disk on the permanent magnetic disk 23 has a magnet layer inside the inner connected aluminum disk, and the magnet layer also includes multiple magnet blocks 13; in addition, in the present invention, an input flange 11 is provided on the input end choke disk 12, and two permanent magnetic disks 23 in the inner rotor component 2 (the permanent magnetic disk 23 of the present invention and the above-mentioned inner connected aluminum disk can be made into an integral structure, which can be an aluminum disk structure); in the present invention, an inner magnetic part 2-1 is provided on the permanent magnetic disk 23; at the same time, in order to ensure the stability of the placement of the magnet group, a back output end choke disk 4 is installed on the back of the aluminum disk, and the two aluminum disks are slid back to back on the connecting shaft 22, and the end of the connecting shaft 22 is connected with the output flange 21.

[0067] In addition, an output flange 21 is connected to one end of the present invention, and a baffle 25 is installed at the other end; the baffle 25 is provided to limit the lateral movement of the aluminum disk (permanent magnetic disk 23).

[0068] In addition, in the present invention, the cross section of the connecting shaft 22 is two or four planes that are tangentially symmetrical on a circle, and the cross section of the inner hole of the aluminum disk corresponds to the cross section of the shaft.

[0069] Compared with the prior art, the present invention has high transmission efficiency, avoids vibration caused by additional radial force, and can achieve overload protection.

[0070] In addition, the magnet blocks 13 used in the present invention can be rectangular, fan-shaped, trapezoidal, etc.; the present invention can form different types of magnet groups by using different magnet blocks 13; specifically, the magnet blocks 13 in the magnet group disclosed in the present invention can be loosely arranged, tightly arranged, magnetically concentrated, etc.

[0071] In addition, in the present invention, the magnet blocks 13 in each magnet group are symmetrically arranged, which is centrally symmetrical. Based on this arrangement, the magnet blocks 13 in the magnet group can be reduced in pairs to meet the torque requirements of different devices.

[0072] In addition, in the present invention, a plurality of connecting plates 15 are sequentially connected to each other and closely arranged to form a sealed structure.

[0073] When the coupling disclosed in the present invention is in use, when the equipment is overloaded, the coupling disclosed in the present invention can automatically increase the air gap 3, cut off the power transmission, stop the load, and idle the motor, thereby realizing a protection function.

[0074] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A disc-type torque-limiting synchronous permanent magnet coupling, characterized in that: The invention comprises an outer rotor component and an inner rotor component; the outer rotor component comprises an input choke disk and an output choke disk; the inner rotor component comprises a connecting shaft, on which a magnetic disk mechanism is sleeved; the input choke disk and the output choke disk are distributed on both sides of the magnetic disk mechanism; the input choke disk and the output choke disk are provided with external magnetic portions; the magnetic disk mechanism comprises two permanent magnetic disks sleeved on the connecting shaft; the permanent magnetic disks are provided with internal magnetic portions; the connecting shaft is provided with at least one flat section; and the permanent magnetic disks are provided with sleeve holes adapted to fit the connecting shaft. The external magnetic part includes an external connecting aluminum disk arranged on the input end choke disk or the output end choke disk, and a magnet group is arranged inside the external connecting aluminum disk; the internal magnetic part includes an internal connecting aluminum disk arranged on the permanent magnetic disk, and a magnet group is arranged on the internal connecting aluminum disk; The magnet group includes a plurality of magnet blocks; the plurality of magnet blocks are sequentially and adjacently arranged in a ring; the magnetic poles of adjacent magnet blocks are distributed in opposite directions; The magnet blocks in each magnet group are symmetrically distributed; Each of the magnet blocks includes a block body, the block body having a lower end face, an upper end face and a connecting side face; the lower end face is connected to the upper end face via the connecting side face; the connecting side face includes a first side face, a second side face, a third side face and a fourth side face; the first side face, the second side face, the third side face and the fourth side face are connected end to end in sequence; the lower end face is arranged opposite to the upper end face; the first side face is arranged opposite to the third side face, and the second side face is arranged opposite to the fourth side face; the lower end face, the first side face and the third side face are arranged opposite to each other; the lower end face, the first side face and the third side face are planar structures; The first side surface and the third side surface are symmetrically arranged, the first side surface and the third side surface are inclined; and the plane of the first side surface intersects the plane of the second side surface; When assembling each of the magnet sets: The magnet blocks are arranged closely together; adjacent magnet blocks are arranged closely together; and there is no blank area between adjacent magnet blocks; The specific steps of the assembly method of the disc-type torque-limiting synchronous permanent magnet coupling are as follows: Step 1: First, use standard parts to assemble the outer rotor component and the inner rotor component respectively; after the outer rotor component and the inner rotor component are assembled, perform dynamic balancing checks on the outer rotor component and the inner rotor component respectively; Step 2: After completing step 1, disassemble and assemble the outer rotor components. First, remove the output choke plate of the outer rotor components. At the same time, retain at least three connecting plates on the input choke plate. After completing the above operations, transfer the remaining outer rotor components and place them on the workbench. The input choke plate should be placed close to the workbench, that is, the input choke plate should be at the bottom and the connecting plates should be at the top. Step 3: After completing step 2, place a non-magnetic pad on the external connection aluminum disk on the input end choke disk; Step 4: After completing step 3, hoist the inner rotor component into the circular cavity formed by the remaining connecting plates in step 2. The end of the inner rotor component connected to the output flange must be at the top. At the same time, when hoisting and installing the inner rotor component, the inner rotor component must fall until the permanent magnetic disk on the side of the inner rotor component close to the input choke disk falls on the non-magnetic pad in step 2. Step 5: After step 4 is completed, reinstall the output choke plate removed in step 2 onto the input choke plate. Step 6: After completing Step 5, place another set of non-magnetic backing plates on the inner connecting aluminum plate of the permanent magnet disk on the side of the inner rotor component close to the output choke disk. Then, push the permanent magnet disk on the side of the inner rotor component close to the output choke disk upward until the non-magnetic backing plates on the permanent magnet disk fit into the outer connecting aluminum plate inside the output choke disk. Step 7: After completing step 6, install a flexible dust ring between the output end choke plate and the connecting shaft; Step 8: After step 7 is completed, install the remaining connecting plates; Step 9: After completing step 8, a permanent magnet coupling is assembled. If you need to assemble a new disc-type torque-limiting synchronous permanent magnet coupling, repeat steps 1 to 8 above.

2. A disc-type torque-limiting synchronous permanent magnet coupling according to claim 1, characterized in that: The second side surface and the fourth side surface are arc-shaped surfaces.

3. The disc-type torque-limiting synchronous permanent magnet coupling according to claim 1, characterized in that: A flexible dustproof ring is provided between the output end choke disc and the connecting shaft.

4. A disc-type torque-limiting synchronous permanent magnet coupling according to claim 1, characterized in that: The input end choke disk and the output end choke disk are connected via a plurality of connecting plates; the plurality of connecting plates are distributed in a ring-shaped area between the input end choke disk and the output end choke disk.

5. The disc-type torque-limiting synchronous permanent magnet coupling according to claim 4, characterized in that: The side surfaces of adjacent connecting plates are in contact with each other.

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