Telescopic eddy current synchronous composite coupler

Abstract

The present invention discloses a nested eddy current synchronous composite coupler, comprising an outer rotor component and an inner rotor component with coinciding axes. The outer rotor support disk is mounted on the outer rotor sleeve, the outer rotor magnetic cylinder is arranged on the outer rotor support disk, the outer rotor permanent magnet group is arranged on the outer rotor magnetic cylinder, and the outer rotor eddy current induction ring is filled between the outer rotor permanent magnet group; the inner rotor support disk is mounted on the inner rotor sleeve, the inner rotor magnetic cylinder is arranged on the inner rotor support disk, the inner rotor permanent magnet group is arranged on the inner rotor magnetic cylinder, and the inner rotor eddy current induction ring is filled between the inner rotor permanent magnet group. The purpose of the present invention is to overcome the respective disadvantages of existing permanent magnet synchronous couplers and permanent magnet eddy current couplers, and to provide a coupler that can ensure synchronous operation of the load and the motor, and has a strong starting overload capacity, and can maintain the advantages of magnetic transmission in terms of vibration reduction, vibration resistance, low alignment requirements, and overload resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnetic couplers, in particular to a composite permanent magnetic coupler capable of heavy-load asynchronous start and synchronous operation. Background Art

[0002] Permanent magnet couplings, as non-mechanical coupling transmission devices, have been widely used in recent years due to their vibration reduction, low alignment requirements, and overload resistance. By leveraging the magnetic induction principle between permanent magnets and eddy current rings, or between permanent magnets, they can achieve torque transmission between the prime mover and the working machine.

[0003] Currently, permanent magnet synchronous couplings and permanent magnet eddy current couplings are widely used in the market. Both have the aforementioned advantages, but due to their respective transmission characteristics, they have significant limitations in heavy loads or starting with load. Specifically, permanent magnet synchronous couplings can force the load speed to synchronize with the motor, achieving high power and torque transmission efficiencies of 100%. However, they have poor starting capabilities and are prone to loss of synchronism when overloaded, which can lead to demagnetization of the coupler's permanent magnets and damage to the coupler. If it is necessary to start with load or start a load with a large moment of inertia, or when the load fluctuates greatly, in order to ensure reliable operation, the power margin of the coupler needs to be greatly increased. The technicians have done experiments. When the air compressor is loaded, the design power margin is enlarged to 3 times the rated load power, but it still cannot guarantee normal operation. When used in heavy-load and large moment of inertia equipment such as ball mills, even when it needs to be increased to 5 times, the starting is still very difficult and needs to be increased to 8 to 10 times before it can be effectively started. For permanent magnet eddy current couplings, when the product is finalized, the greater the speed difference between the load and the motor, the greater the torque transmitted, so it has better load starting capability. However, since its transmitted torque depends on the speed difference, the smaller the slip, the smaller the transmitted torque. In theory, it is impossible to achieve synchronous operation of the load and the motor. When designed to the limit, the speed difference still needs to be maintained at 2%-3%. In other words, the permanent magnet eddy current coupling cannot drive the load to rotate synchronously with the motor. During use, there is a power loss of more than 2%. Summary of the Invention

[0004] The purpose of the present invention is to overcome the respective disadvantages of the existing permanent magnet synchronous coupler and permanent magnet eddy current coupler, and to provide a coupler that can ensure the synchronous operation of the load and the motor, and has a strong starting overload capacity, while maintaining the advantages of magnetic transmission vibration reduction, vibration resistance, low alignment requirements and overload resistance.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A telescopic eddy current synchronous composite coupler comprises an outer rotor component and an inner rotor component with coinciding axes;

[0007] The outer rotor components include: an outer rotor sleeve, an outer rotor support plate, an outer rotor magnetic cylinder, an outer rotor permanent magnet group, and an outer rotor eddy current induction ring; the outer rotor support plate is mounted on the outer rotor sleeve, the outer rotor magnetic cylinder is arranged on the outer rotor support plate, the outer rotor permanent magnet group is arranged on the outer rotor magnetic cylinder, and the outer rotor eddy current induction ring is filled between the outer rotor permanent magnet group;

[0008] The inner rotor components include: an inner rotor sleeve, an inner rotor support disk, an inner rotor magnetic cylinder, an inner rotor permanent magnet group, and an inner rotor eddy current induction ring; the inner rotor support disk is mounted on the inner rotor sleeve, the inner rotor magnetic cylinder is arranged on the inner rotor support disk, the inner rotor permanent magnet group is arranged on the inner rotor magnetic cylinder, and the inner rotor eddy current induction ring is filled between the inner rotor permanent magnet group.

[0009] In one embodiment, the outer rotor permanent magnet group and the outer rotor eddy current induction ring are embedded in the outer silicon steel laminations, and the outer silicon steel laminations are fixed on the outer rotor magnetic tube.

[0010] In one embodiment, the inner rotor permanent magnet group and the inner rotor eddy current induction ring are embedded in the inner silicon steel laminations, and the inner silicon steel laminations are fixed on the inner rotor magnetic tube.

[0011] In one embodiment, heat sinks are installed on the outer rotor magnetic conductive cylinder and the inner rotor magnetic conductive cylinder.

[0012] In one embodiment, ventilation holes are provided on the outer rotor support plate and the inner rotor support plate.

[0013] In one embodiment, the outer rotor support plate and the outer rotor magnetic conductive cylinder are of a separate structure or an integrated structure.

[0014] In one embodiment, the inner rotor support plate and the inner rotor magnetic conductive cylinder are of a separate structure or an integrated structure.

[0015] In one embodiment, a gap is formed between the outer rotor eddy current induction ring and the outer rotor permanent magnet group; and a gap is formed between the inner rotor eddy current induction ring and the inner rotor permanent magnet group.

[0016] In one embodiment, the telescopic eddy current synchronous composite coupler further includes an asynchronous starting auxiliary component; the asynchronous starting auxiliary component includes: an active structure provided on the inner rotor support disk, and a driven structure provided on the outer rotor support disk;

[0017] The active structure includes: a sleeve and a plurality of pressing assemblies; the plurality of pressing assemblies are mounted on the sleeve and distributed in a circular array with the axis of the sleeve as the center; the driven structure includes a column; the column is sleeved in the sleeve, and a plurality of pressure grooves are formed on the side of the column, and the plurality of pressure grooves correspond to the plurality of pressing assemblies one by one;

[0018] The pressing assembly includes a pressing spring and a pressing ball; the pressing spring is used to provide elastic force for the pressing ball so that the pressing ball is pressed against the side of the column;

[0019] The column is provided with a receiving chamber in communication with the pressure groove, and a quick-acting knocking assembly is provided in the receiving chamber;

[0020] The quick-action knocking assembly includes: a knocking ball and a knocking nail; the knocking ball is movably arranged in the accommodating chamber, and the knocking nail is arranged in the accommodating chamber via a return spring, and the knocking ball strikes the knocking nail, so that one end of the knocking nail reaches the pressure groove from the accommodating chamber;

[0021] A magnetic block is provided at the center of the column, and the magnetic block is used to provide magnetic force for the striking ball.

[0022] The purpose of the present invention is to overcome the respective disadvantages of the existing permanent magnet synchronous coupler and permanent magnet eddy current coupler, and to provide a coupler that can ensure the synchronous operation of the load and the motor, and has a strong starting overload capacity, while maintaining the advantages of magnetic transmission vibration reduction, vibration resistance, low alignment requirements and overload resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a structural diagram (1) of a telescopic eddy current synchronous composite coupler according to an embodiment of the present invention;

[0025] Figure 2 This is a structural diagram (2) of a telescopic eddy current synchronous composite coupler according to an embodiment of the present invention;

[0026] Figure 3 for Figure 1 The exploded view of the telescopic eddy current synchronous composite coupler shown in (1);

[0027] Figure 4 for Figure 1 The exploded view of the telescopic eddy current synchronous composite coupler shown (II);

[0028] Figure 5 for Figure 1 The exploded view of the telescopic eddy current synchronous composite coupler shown (3);

[0029] Figure 6 for Figure 1 A cross-sectional view of the telescopic eddy current synchronous composite coupler shown;

[0030] Figure 7 For Figure 6 A schematic diagram of a silicon steel lamination is provided on the basis of the silicon steel lamination;

[0031] Figure 8 A schematic diagram of a telescopic eddy current synchronous composite coupler according to another embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the structure of the asynchronous startup auxiliary component;

[0033] Figure 10 for Figure 9 The state diagram of the asynchronous startup auxiliary component shown in (a);

[0034] Figure 11 for Figure 9 The state diagram of the asynchronous startup auxiliary component is shown in (ii). DETAILED DESCRIPTION

[0035] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] like Figure 1 and Figure 2 As shown, the present invention discloses a telescopic eddy current synchronous composite coupler 10, which includes an outer rotor component 100 and an inner rotor component 200 with coinciding axes.

[0039] Please also refer to Figure 3 、 Figure 4 and Figure 5 The outer rotor component 100 includes an outer rotor sleeve 110, an outer rotor support plate 120, an outer rotor magnetic cylinder 130, an outer rotor permanent magnet group 140, and an outer rotor eddy current induction ring 150. The outer rotor support plate 120 is mounted on the outer rotor sleeve 110, the outer rotor magnetic cylinder 130 is disposed on the outer rotor support plate 120, the outer rotor permanent magnet group 140 is disposed on the outer rotor magnetic cylinder 130, and the outer rotor eddy current induction ring 150 is filled between the outer rotor permanent magnet group 140. The outer rotor support plate 120 and the outer rotor magnetic cylinder 130 can be of separate or integrated structure.

[0040] Please also refer to Figure 3 、 Figure 4 and Figure 5 The inner rotor component 200 includes an inner rotor sleeve 210, an inner rotor support plate 220, an inner rotor magnetic cylinder 230, an inner rotor permanent magnet group 240, and an inner rotor eddy current induction ring 250. The inner rotor support plate 220 is mounted on the inner rotor sleeve 210, the inner rotor magnetic cylinder 230 is disposed on the inner rotor support plate 220, the inner rotor permanent magnet group 240 is disposed on the inner rotor magnetic cylinder 230, and the inner rotor eddy current induction ring 250 is filled between the inner rotor permanent magnet group 240. The inner rotor support plate 220 and the inner rotor magnetic cylinder 230 can be of separate or integrated structure.

[0041] like Figure 6 As shown, it should be noted that, in the present invention, when the outer rotor component 100 and the inner rotor component 200 operate asynchronously (differentially), the outer rotor permanent magnet group 140 cooperates with the inner rotor eddy current induction ring 250, and the inner rotor permanent magnet group 240 cooperates with the outer rotor eddy current induction ring 150 to form an eddy current group; when the outer rotor component 100 and the inner rotor component 200 operate synchronously, the outer rotor permanent magnet group 140 cooperates with the inner rotor permanent magnet group 240 to form a synchronous group.

[0042] The telescopic eddy current synchronous composite coupler 10 of the present invention has a radial structure as its main body, with inner and outer rotors coaxial. Its main structure is a permanent magnet synchronous coupler structure. By setting a magnetic pole gap and arranging an eddy current induction ring filled between each magnetic pole and connected at the end in the gap, during asynchronous (differential) operation, the magnetic poles and the eddy current induction ring constitute a permanent magnet eddy current coupler structure to provide eddy current torque.

[0043] The present invention provides torque in the form of a permanent magnet synchronous coupler and a permanent magnet eddy current coupler in two different operating states, synchronous and asynchronous. At startup, since the load speed is zero and the slip is the largest, the eddy current group provides a large starting torque due to the high slip. As the load speed increases, the slip gradually decreases until it approaches the synchronous group cut-in speed. Then the synchronous group gradually cuts in and enters the synchronous operation state. During normal operation, the load is the same as the motor speed. When the load fluctuates, the synchronous group has a certain range of overload capacity. When it does not exceed the designed maximum torque of the synchronous group, it is still driven by the synchronous group to operate synchronously. When the load fluctuation exceeds the maximum torque of the synchronous group, slip occurs, and the eddy current group continues to provide torque generated by the differential until it returns to the cut-in speed of the synchronous group and the synchronous group takes effect to re-enter the synchronous operation.

[0044] The nested eddy current synchronous composite coupler 10 of the present invention is activated by the eddy current group during startup and has a large starting torque. After entering the synchronous state, the eddy current group does not work because the speed difference is zero, and no power loss is generated. Therefore, during normal synchronous operation, the transmission efficiency can still reach 100%.

[0045] The magnetic pole groups and eddy current induction rings can be directly fixed on the inner surface of the outer rotor tube and the outer surface of the inner rotor tube, or they can be embedded in silicon steel laminations (or other magnetic conductive materials) and fixed to the inner and outer rotor tubes through the silicon steel laminations. Taking into account that if the permanent magnet is in asynchronous (differential) operation for a long time, the anti-demagnetization ability of the permanent magnet (i.e. the coercive force of the permanent magnet) is required to be high, as an optimization, the permanent magnet and eddy current induction rings can be embedded in silicon steel laminations (or other magnetic conductive materials) and fixed to the inner and outer rotor tubes through the silicon steel laminations. When the magnetic poles are of the same polarity and facing each other, part of the magnetic field can be conducted out through the connected silicon steel, thereby reducing the requirements for the anti-demagnetization ability of the permanent magnet and improving the stability of the product. For example, Figure 7 As shown, the outer rotor permanent magnet group 140 and the outer rotor eddy current induction ring 150 are embedded in the outer silicon steel lamination 160, and the outer silicon steel lamination 160 is fixed on the outer rotor magnetic tube 130; the inner rotor permanent magnet group 240 and the inner rotor eddy current induction ring 250 are embedded in the inner silicon steel lamination 260, and the inner silicon steel lamination 260 is fixed on the inner rotor magnetic tube 230.

[0046] like Figure 4As shown, to improve heat dissipation, heat sinks 300 are installed on the outer rotor magnetic cylinder 130 and the inner rotor magnetic cylinder 230, and ventilation holes 400 are provided on the outer rotor support plate 120 and the inner rotor support plate 220. The heat sinks are located at the same position as the induction rings, but the area covered is not limited to the induction ring area.

[0047] Furthermore, a gap is formed between the outer rotor eddy current induction ring 150 and the outer rotor permanent magnet group 140; a gap is formed between the inner rotor eddy current induction ring 250 and the inner rotor permanent magnet group 240, which is mainly to prevent the eddy current ring from heating up and causing the permanent magnet to demagnetize.

[0048] like Figure 8 The present invention also discloses a "minimalist" telescopic eddy current synchronous composite coupler. This "minimalist" structure removes the outer rotor eddy current induction ring 150, leaving only the inner rotor eddy current induction ring 250. This inner rotor eddy current induction ring 250 is moved outward to the outside of the inner rotor permanent magnet group 240. This eddy current induction ring structure is simple and easy to manufacture, making it suitable for light load start-up and synchronous operation.

[0049] The nested eddy current synchronous composite coupler 10 of the present invention, particularly during the initial startup phase, primarily relies on the "eddy current group" to provide a high starting torque. Over time, the "eddy current group" generates heat, and excessively high temperatures can cause demagnetization of the permanent magnets. The time the "eddy current group" is engaged during the initial startup phase should be minimized to reduce heat generation. To achieve synchronization of the inner and outer rotors as quickly as possible, it is necessary to consider providing a mechanical connection between the inner and outer rotors. During the initial startup phase, the inner rotor drives the outer rotor through mechanical force transmission. Once the outer rotor reaches a certain speed, the mechanical connection between the inner and outer rotors is disconnected.

[0050] To this end, the telescopic eddy current synchronous composite coupler 10 of the present invention further includes an asynchronous starting auxiliary component 500 (such as Figure 3 In the initial stage of startup, the inner rotor drives the outer rotor to rotate through the asynchronous startup auxiliary component 500. When the outer rotor reaches a certain speed, the asynchronous startup auxiliary component 500 between the inner and outer rotors is disconnected.

[0051] During the design of the asynchronous starting auxiliary component 500, a technical issue needs to be considered: when the outer rotor reaches a certain speed, the asynchronous starting auxiliary component 500 needs to be stably disconnected, otherwise the coupler will lose its original function. The asynchronous starting auxiliary component 500 is also just an auxiliary component, which only establishes a mechanical connection between the inner and outer rotors to assist the rotor in starting and provide initial force for the rotor, so that the rotor can reach a higher speed in the shortest possible time, reduce the time for the "eddy current group" to intervene, and prevent the eddy current ring from heating up and causing the permanent magnet to demagnetize.

[0052] like Figure 3 As shown, specifically, the asynchronous starting auxiliary assembly 500 includes: an active structure 600 provided on the inner rotor support disk 220 , and a driven structure 700 provided on the outer rotor support disk 120 .

[0053] Please also refer to Figure 9 、 Figure 10 and Figure 11 The active structure 600 includes a sleeve 610 and a plurality of pressing assemblies 620. The plurality of pressing assemblies 620 are mounted on the sleeve 610 and arranged in a circular array centered on the axis of the sleeve 610. The passive structure 700 includes a column 710; the column 710 is sleeved within the sleeve 610 and has a plurality of pressure grooves 711 formed on its side. The plurality of pressure grooves 711 correspond to the plurality of pressing assemblies 620.

[0054] Please also refer to Figure 9 、 Figure 10 and Figure 11 The pressing assembly 620 includes a pressing spring 621 and a pressing ball 622. The pressing spring 621 is used to provide elastic force for the pressing ball 622 so that the pressing ball 622 is pressed against the side of the column 710.

[0055] Please also refer to Figure 9 、 Figure 10 and Figure 11 The column 710 has an accommodating chamber 712 in communication with the pressure groove 711 , and the accommodating chamber 712 has a quick-acting knocking assembly 800 .

[0056] Please also refer to Figure 9 、 Figure 10 and Figure 11 The quick-action knocking assembly 800 includes a knocking ball 810 and a knocking pin 820. The knocking ball 810 is movably disposed in the accommodating chamber 712, and the knocking pin 820 is disposed in the accommodating chamber 712 via a return spring 821. The knocking ball 810 strikes the knocking pin 820, causing one end of the knocking pin 820 to move from the accommodating chamber 712 to the pressure groove 711.

[0057] Please also refer to Figure 9 、 Figure 10 and Figure 11 A magnetic block 900 is provided at the center of the column 710 , and the magnetic block 900 is used to provide magnetic force for the striking ball 810 .

[0058] The working principle of the asynchronous startup auxiliary component 500 is described below:

[0059] When not activated, due to the magnetic force of the magnetic block 900, the knocking ball 810 is located at the bottom of the accommodating chamber 712, and the knocking ball 810 and the knocking pin 820 are separated. Moreover, due to the elastic force of the return spring 821, the knocking pin 820 is also completely accommodated in the accommodating chamber 712, and one end of the knocking pin 820 does not reach the pressure groove 711.

[0060] When not activated, the holding ball 622 is pressed against the pressure groove 711 on the side of the column 710 by the elastic force of the holding spring 621;

[0061] During startup, the inner rotor magnetic tube 230 drives the inner rotor support disk 220 to rotate, and the inner rotor support disk 220 drives the outer rotor component 100 to rotate through the asynchronous startup auxiliary component 500;

[0062] Specifically, because the holding ball 622 is pressed against the pressure groove 711 on the side of the column 710, friction exists between the holding ball 622 and the pressure groove 711. The active structure 600 drives the driven structure 700 through this "momentary" friction. This "momentary" friction provides auxiliary power for the entire outer rotor component 100, allowing the outer rotor component 100 to reach a certain speed as quickly as possible. Subsequently, the holding ball 622 will disengage from the pressure groove 711. At this time, both the inner and outer rotors have already started to rotate. Under the action of centrifugal force, the holding ball 622 will overcome the elastic force of the holding spring 621 and separate from the side of the column 710, and the holding ball 622 will no longer contact the side of the column 710.

[0063] It can be seen from this that the asynchronous starting auxiliary component 500 is only an auxiliary power-assisting component. In the initial stage of starting, the main function is still the "eddy current group". After the asynchronous starting auxiliary component 500 provides a "momentary" friction force, it is necessary to ensure that the asynchronous starting auxiliary component 500 is quickly disconnected to ensure the basic function of the coupler.

[0064] In order to increase the rotor's rotational speed in a short period of time, it is necessary to increase the friction between the holding ball 622 and the pressure groove 711. Providing an anti-slip rubber pad on the contact surface between the holding ball 622 and the pressure groove 711 is an economical and practical method. However, over time, the anti-slip rubber pad will age, and the holding ball 622 and the pressure groove 711 will easily adhere to each other. This adhesion will make it difficult for the holding ball 622 to detach from the pressure groove 711, which will cause problems for the normal operation of the entire coupler.

[0065] To solve the above problems, the asynchronous starting auxiliary assembly 500 of the present invention is further provided with a quick knocking assembly 800. When the rotor speed reaches a certain level, the centrifugal force on the knocking ball 810 is greater than the magnetic attraction of the magnetic block 900, and the knocking ball 810 will quickly hit the knocking pin 820. The knocking pin 820 will then overcome the resistance of the return spring 821, and one end of the knocking pin 820 will reach the pressure groove 711. The knocking pin 820 is hit by the knocking ball 810, generating a huge impact force. This impact force will separate the holding ball 622 in the pressure groove 711, so that the holding ball 622 can be separated from the pressure groove 711 very stably.

[0066] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A telescopic eddy current synchronous composite coupler, characterized in that: It includes an outer rotor component and an inner rotor component whose axes coincide with each other; The outer rotor components include: an outer rotor sleeve, an outer rotor support plate, an outer rotor magnetic cylinder, an outer rotor permanent magnet group, and an outer rotor eddy current induction ring; the outer rotor support plate is mounted on the outer rotor sleeve, the outer rotor magnetic cylinder is arranged on the outer rotor support plate, the outer rotor permanent magnet group is arranged on the outer rotor magnetic cylinder, and the outer rotor eddy current induction ring is filled between the outer rotor permanent magnet group; The inner rotor component includes: an inner rotor sleeve, an inner rotor support disk, an inner rotor magnetic cylinder, an inner rotor permanent magnet group, and an inner rotor eddy current induction ring; the inner rotor support disk is mounted on the inner rotor sleeve, the inner rotor magnetic cylinder is arranged on the inner rotor support disk, the inner rotor permanent magnet group is arranged on the inner rotor magnetic cylinder, and the inner rotor eddy current induction ring is filled between the inner rotor permanent magnet group; The outer rotor permanent magnet group and the outer rotor eddy current induction ring are embedded in the outer silicon steel laminations, and the outer silicon steel laminations are fixed on the outer rotor magnetic tube; the inner rotor permanent magnet group and the inner rotor eddy current induction ring are embedded in the inner silicon steel laminations, and the inner silicon steel laminations are fixed on the inner rotor magnetic tube; The nested eddy current synchronous composite coupler also includes an asynchronous starting auxiliary component; the asynchronous starting auxiliary component includes: an active structure provided on the inner rotor support disk, and a driven structure provided on the outer rotor support disk; the active structure includes: a sleeve, a plurality of pressing components; a plurality of the pressing components are installed on the sleeve and are distributed in an annular array with the axis of the sleeve as the center; the driven structure includes a column; the column is sleeved in the sleeve, and a plurality of pressure grooves are provided on the side of the column, and the plurality of pressure grooves correspond one to one with the plurality of pressing components; the pressing component includes a pressing spring and a pressing ball; The holding spring is used to provide elastic force for the holding ball so that the holding ball is pressed on the side of the column; a receiving chamber connected to the pressure groove is opened inside the column, and a quick knocking assembly is provided in the receiving chamber; the quick knocking assembly includes: a knocking ball and a knocking nail; the knocking ball is movably arranged in the receiving chamber, and the knocking nail is arranged in the receiving chamber through a return spring, and the knocking ball hits the knocking nail so that one end of the knocking nail reaches the pressure groove from the receiving chamber; a magnetic block is provided at the center of the column, and the magnetic block is used to provide magnetic force for the knocking ball.

2. The telescopic eddy current synchronous composite coupler according to claim 1, characterized in that: Heat sinks are installed on the outer rotor magnetic conductive cylinder and the inner rotor magnetic conductive cylinder.

3. The telescopic eddy current synchronous composite coupler according to claim 2, characterized in that: Ventilation holes are provided on the outer rotor support disk and the inner rotor support disk.

4. The telescopic eddy current synchronous composite coupler according to claim 1, characterized in that: The outer rotor support plate and the outer rotor magnetic conductive cylinder are of a split structure or an integrated structure.

5. The telescopic eddy current synchronous composite coupler according to claim 4, characterized in that: The inner rotor support plate and the inner rotor magnetic conductive cylinder are of a split structure or an integrated structure.

6. The telescopic eddy current synchronous composite coupler according to claim 1, characterized in that: A gap is formed between the outer rotor eddy current induction ring and the outer rotor permanent magnet group; a gap is formed between the inner rotor eddy current induction ring and the inner rotor permanent magnet group.

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