CN212969410U - Magnetic transmission device and electric rotating device - Google Patents

Abstract

The utility model discloses a magnetic transmission device and an electric rotating device; the magnetic transmission device comprises a driving wheel, a driven wheel and a plurality of permanent magnets; permanent magnets with magnetic poles arranged along the rotating shaft direction are alternately distributed on the driving wheel/driven wheel around the rim, and the permanent magnets have the arc length m1 and the interval m2 in the tangential direction of the rim; the arc length n1 and the spacing n2 of the permanent magnet of the driven wheel along the tangential direction of the wheel rim; set to (m1+ n1) ═ m2+ n 2. The driving wheel and the driven wheel are provided with gaps and are arranged on different planes in a coaxial and adjacent way in a way that the wheel rims are embedded; the electric rotating device comprises an electric device and a magnetic transmission device; the electric device comprises a motor, a power supply and a control system, wherein the motor is connected with the power supply or the control system; the rotor of the motor is mechanically and fixedly connected with the rotating shaft of the driving wheel in the magnetic transmission device.

Description

Magnetic transmission device and electric rotating device

Technical Field

The utility model relates to a mechanical energy transmission and electric actuator's design field, concretely relates to magnetic transmission device and electric rotary device.

Background

The transmission device is widely applied, most commonly, the transmission device is driven through a rotating shaft, and a plurality of non-rotating shaft transmission modes are provided, for example, a flywheel is added on the rotating shaft, mechanical energy is provided outwards through the outer edge of the flywheel, and a transmission belt is usually used for enabling a driven wheel to obtain transmission torque, so that the design purpose of changing the rotating speed is achieved; there are also many designs in which teeth are provided on the outer edge of the rotating shaft to which the flywheel is attached, and torque is transmitted to a driven wheel having teeth also provided on the outer edge.

The intelligent control research of the transmission device is active in recent years, for example, the load of some electric rotating devices does not need absolute speed stabilization, the intelligent control device can be designed, when the load reaches the upper limit of the rotating speed, the driving wheel is disconnected and powered off, and when the load falls to the lower limit of the rotating speed, the electric rotating devices are powered on and coupled again, so that the purpose of saving electricity is achieved. In order to more conveniently control the coupling of the electric rotating device and the load, a plurality of design schemes are that magnetic transmission is used, and the most obvious structural characteristics of the magnetic transmission mechanism are as follows: the outer edges of the driving wheel and the driven wheel are provided with permanent magnets with magnetic poles along the tangential line or the normal direction, the two wheels are adjacent but not in contact, and the driven wheel is usually made of a single material with large mass.

The present application is provided mainly for the structural improvement of such a magnetic transmission mechanism.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming some current magnetic drive mechanism's design defect, providing an action wheel and the magnetic drive device who inlays the mode mutually at the adjacent installation of coplanar with the axial from the driving wheel with the rim, the magnetic drive through the action wheel makes and obtains the torque of settlement from the driving wheel, and transmission efficiency is high, and the technology is realized easily.

In order to achieve the above technical object, the present invention provides a magnetic transmission device, which includes a driving wheel, a driven wheel and a plurality of permanent magnets; the driving wheel is provided with a plurality of driving wheel permanent magnets with magnetic poles arranged along the rotating shaft direction of the driving wheel at intervals around the rim of the driving wheel, the arc length of the driving wheel permanent magnets along the tangential direction of the rim is m1, and the distance between the driving wheel permanent magnets and the rim is m 2; the driven wheel surrounds the rim of the driven wheel, a plurality of driven wheel permanent magnets with magnetic poles arranged along the rotating shaft direction of the driven wheel are alternately distributed on the rim of the driven wheel, the arc length of the driven wheel permanent magnets along the tangential direction of the rim is n1, and the distance is n 2; a plurality of permanent magnets on the driving wheel and the driven wheel are set to be (m1+ n1) ═ m2+ n 2; the driving wheel and the driven wheel are provided with gaps and are arranged on different planes in a coaxial and adjacent mode in a way that the wheel rims are embedded; when the driving wheel rotates, the magnetic poles of a plurality of permanent magnets arranged on the two wheels are periodically opposite, and the driven wheel obtains torque through magnetic transmission.

In the utility model, the basal bodies of the driving wheel and the driven wheel are made of solid molding materials, such as non-magnetic alloy and plastic steel; the permanent magnet is made of permanent magnetic materials known to those skilled in the art, such as magnetic steel, neodymium iron boron and the like; the direction of the rotating shaft is a connecting line of two ends of the rotating shaft and an extension line direction thereof; the magnetic pole direction of the permanent magnet is determined by two magnetic poles of the permanent magnet N/S; the gap is related to the power of the torque transmission device and also related to the material flux density of the permanent magnet; the driving wheel is embedded with the rim of the torque-variable wheel, and the positions of the two wheels which are arranged in the same axial direction and adjacent to each other on different planes are expressed; when the driving wheel rotates, the magnetic poles of a plurality of permanent magnets of the two wheels are periodically opposite, and the characteristic parts and the magnetic pole directions which are coaxially and adjacently arranged on different planes with the torque conversion wheel are further defined.

In the technical scheme, the base body of the driving wheel/driven wheel is formed by fixedly connecting a plurality of layers of annular components made of different materials. The base body of the driving/driven wheel is made of multiple layers of different materials, which may provide more design flexibility.

In the technical scheme, at least 1 driving wheel and at least 1 driven wheel are arranged in the magnetic transmission device. The arrangement of the driving wheels and the driven wheels is beneficial to enhancing the magnetic interaction between the two wheels.

In the above technical solution, the permanent magnets disposed on the driving wheel/driven wheel are arranged in the same magnetic pole direction, or in an N-S alternating magnetic pole manner.

Based on the technical scheme of the magnetic transmission device, the utility model also provides an electric rotating device, which comprises an electric device and a magnetic transmission device; the electric device comprises a rotary motor, a power supply and a control system, wherein the motor is connected with the power supply or the control system; the magnetic transmission device comprises a driving wheel, a driven wheel and a plurality of permanent magnets, wherein the driving wheel is mechanically and fixedly connected with a rotor of a motor in the electric device.

In the technical scheme, the rotating shaft of the motor is mechanically and fixedly connected with the rotating shaft of the driving wheel in the magnetic transmission device.

As an improvement of the technical scheme of the electric rotating device, the motor is an outer rotor type, and a driving wheel rotating shaft of the driving wheel is sleeved on the outer rotor of the motor and is mechanically and fixedly connected. The rotating shaft of the driving wheel is sleeved on the outer rotor of the motor, which means that the driving wheel is correspondingly designed into an annular shape, the inner ring is used as the rotating shaft with a deformation design, and the inner ring is large enough and can be sleeved on the outer rotor of the motor.

As another technical improvement of the electric rotating device, the driving wheel and the outer rotor of the motor are integrally designed.

In the technical scheme of the electric rotating device, the source form of the power supply of the electric rotating device is arbitrary.

The magnetic transmission device and the electric rotating device need mechanical frame parts during installation, and the mechanical frame parts are made of any materials and have any structures on the premise of effectively realizing mechanical support.

Magnetic transmission device and mechanical transmission schemes such as conventional belt, gear's essence difference lie in the action wheel with do not take place mechanical contact from the driving wheel, the drive wheel is to the magnetic energy transmission from the driving wheel, change and the change is the torque from the driving wheel through the distribution state of the clearance magnetic field between the two-wheeled, when having certain quality and rotation rate when enough from the driving wheel, can combine the rotary inertia of concrete design make full use of follow driving wheel.

The electric rotating device provides a new structure idea of intelligent control for the electric device according to the driven wheel and the load inertia state thereof on the basis of the scheme that the driving wheel of the magnetic transmission device is not in mechanical contact with the driven wheel, for example, the running state of the motor can be effectively controlled by monitoring the torque of the driven wheel and the load inertia state thereof and combining with the rotating shaft displacement control of the motor so as to achieve the design goal of energy conservation.

The utility model has the advantages that: the energy transmission of the driving wheel to the driven wheel in the magnetic transmission device adopts magnetic interaction, and the driving wheel and the driven wheel are not in mechanical contact, so that the transmission loss of mechanical energy is reduced; the electric rotating device provides a new design idea of an intelligent control motor; the magnetic transmission device and the electric rotating device designed according to the scheme have simple structures and diversified combinations, and effectively meet the design requirements of high-end fields.

Drawings

FIG. 1a is a schematic diagram of a top view of a permanent magnet 4 on the rim of a driving wheel;

FIG. 1b is a schematic side view of the example of FIG. 1 a;

FIG. 2 is a schematic view of a configuration in which 8 rotating magnets are provided on the rim of a driven wheel;

FIG. 3 is a schematic view of an installation structure of a driving wheel and a driven wheel;

fig. 4 is a schematic view of a driven wheel made of two different materials.

FIG. 5 is a schematic view of an installation structure of a driving wheel and two driven wheels;

FIG. 6 is a partial schematic view of a mounting structure of an electric rotating apparatus;

FIG. 7a is a schematic structural view of the driving wheel sleeved on the outer rotor of the motor;

FIG. 7b is a schematic structural diagram of an integrated design of the driving wheel and the outer rotor of the motor;

the attached drawings are as follows:

1. a driving wheel 1a, a driving wheel rotating shaft 1b, a driving wheel rim 21 and a driving wheel permanent magnet

3. Driven wheel 3a, driven wheel rotating shaft 3b, driven wheel rim 23 and driven wheel permanent magnet

3b1, wheel material 13 b2, wheel material 24, gap 5, pole line

6. Motor 6a, motor shaft 6b, motor outer rotor 10, wheel plane normal

11. Plane line 12, rim tangent line 13, normal of the wheel

Detailed Description

The present invention will be further described in detail with reference to the drawings and examples.

The magnetic pole of permanent magnet is the direction setting along the pivot, but this magnetic pole direction sets up the perpendicular direction setting that the multiaspect was understood as the plane line 11 with the wheel, or the direction setting that magnetic pole line 5 is parallel with the pivot, and the magnetic pole line is line and the extension line that permanent magnet 21/23 was confirmed by two magnetic poles of N, S.

Fig. 1a and 1b are schematic top and side views of a structure of the driving wheel 1, and the structure is characterized in that 4 driving wheel permanent magnets 21 are arranged around a rim 1b at intervals; the 4 permanent magnets are arranged in an N/S magnetic pole alternating mode, the magnetic pole direction of the driving wheel permanent magnet 21 is arranged along the direction of the rotating shaft 1a of the driving wheel, the magnetic pole line 5 is parallel to the rotating shaft 1a of the driving wheel, the arc length of the driving wheel permanent magnet 21 is m1, and the distance between the driving wheel permanent magnets is m 2; the arc length refers to the length of the center line of the permanent magnet along the direction of the rim tangent line 12, and the distance refers to the distance between two adjacent permanent magnets. The driven wheel permanent magnets 23 are arranged on the driven wheel 3 at intervals around the driven wheel rim 3b, and the magnetic pole arrangement is arranged along the direction of the driven wheel rotating shaft 3 a.

The permanent magnet may be provided on the outer surface of the rim 1b/3b or embedded in the rim so that the arc of the outer surface of the permanent magnet coincides with the outer surface of the rim 1b/3 b. Fig. 2 is an example of the driven wheel 3 in which the driven wheel permanent magnets 23 are arranged around the driven wheel rim 3b at intervals, the magnetic pole directions are arranged in the direction of the driven wheel rotation shaft 3a of the driven wheel 3 and at intervals of N, S, and the driven wheel permanent magnets 23 are embedded inside the driven wheel rim 3b with an arc length n1 and a spacing n 2.

The utility model discloses another difference with prior art is that action wheel 1 and from the mode that wheel rim inlayed mutually at the coplanar adjacent installation of co-axial from driving wheel 3. The driving wheel and the torque conversion wheel are on different planes, the plane lines 11 of the two wheels are not on the same plane, and preferably the plane lines 11 of the two wheels do not intersect; the mode that the wheel rim inlays mutually has defined the position that two rounds set up adjacently, sets up clearance 4 between the two rounds and has further defined two rounds and not contact, has implied the technical requirement to the distance between the two rounds simultaneously. It is known in the art that the gap of magnetic action, also called air gap, is the energy path for transferring magnetic action between magnets, and smaller gaps are more beneficial for transferring the action of magnetic energy between permanent magnets.

When the driving wheel and the driven wheel run relatively, the motion trail of the permanent magnets on the wheels is a closed circumferential line, and the magnetic poles of the permanent magnets arranged on the two wheels periodically and relatively imply the technical preference for equipment installation when the driving wheel rotates. Fig. 3 shows a preferred example of a magnetic transmission device, when the driving wheel permanent magnet 21 on the driving wheel 1 periodically opposes the driven wheel permanent magnet 23 on the driven wheel 3 in rotation, and the magnetic pole lines 5 of the permanent magnets 21/23 coincide, in this state, the projection of the magnetic pole motion contour of the permanent magnet 21/23 is tangent, and the maximum value of the magnetic interaction between the driving wheel and the driven wheel can be obtained.

The utility model discloses in, action wheel 1 does not take place the transmission that machinery linked firmly with from driving wheel 3, but the magnetic field energy of 4 transmission regularity changes in the clearance through the two-wheeled, and the distribution state through clearance magnetic field changes the energy transformation of transmission between the permanent magnet for the torque from the driving wheel to reach torque transmission's design objective.

The design point of the present invention is that (m1+ n1) ═ m2+ n2 of a plurality of permanent magnets on the driving wheel 1/driven wheel 3 is the same, the higher the implementation precision is, the better the magnetic transmission effect is, the technical design of (m1+ n1) ═ m2+ n2 is not required to be m1 ═ m2 or n1 ═ n2, as long as (m1+ n1) ═ m2+ n2) and the driving wheel 1 continuously rotates, the periodic magnetic action between the permanent magnets 21/23 can be realized. The permanent magnets are arranged at intervals, preferably in average interval arrangement, and are not limited in shape on the premise of not influencing the installation on respective rims.

In the utility model, the base bodies of the driving wheel 1 and the driven wheel 3 can be made of plastic steel, alloy or other solid forming materials, but the materials are selected to have different characteristics. The torque of the driven wheel is connected with a load end, so that the driven wheel has large mass and is beneficial to compound utilization of inertia, and therefore, the driven wheel is suitable to be made of nonmagnetic alloy with large specific gravity; the driving wheel is driven by a power source, and on the premise of not influencing the effective transmission of magnetic energy to the driven wheel, the driving wheel is allowed to be made of a material with relatively small specific gravity, for example, plastic steel, ABS or other solid forming materials can be adopted.

The structure of driving wheel and driven wheel includes: the disc or the rings are combined, the rings are combined into the disc in a coaxial mode, or the rings are fixedly connected into a whole through a structural fastener, and the disc or the rings are designed and manufactured integrally. Fig. 4 is an example of a disc-shaped driven wheel 3 combined by two rings made of different materials 3b1/3b2, the material of the ring 3b2 is ABS, and the material of the ring 3b1 is a nonmagnetic alloy, and the combined disc design has the advantages of facilitating the integrated process manufacturing of the permanent magnet 23 and the ring 3b2, and simultaneously, the mass (the specific gravity of the material) of the ring 3b1 is utilized to ensure that the driven wheel 3 has considerable inertia when rotating.

The number of the driving wheels 1 and the driven wheels 3 is at least 1, which means that one driving wheel can be designed to drive a plurality of driven wheels, and a plurality of driving wheels can also be designed to drive one driven wheel, including a plurality of driving wheels driving a plurality of torque-variable wheels, and fig. 5 is an example in which one driving wheel 1 drives two driven wheels 3.

The driven wheel 3 illustrated in fig. 2 is provided with 8 driven wheel permanent magnets 23, and when the torque of the driven wheel due to the magnetic force needs to be increased, the driven wheel permanent magnets can be additionally arranged, for example, 16 driven wheel permanent magnets 23 can be arranged on the driven wheel rim 3 b; similarly, a greater number of the capstan permanent magnets 21 can be additionally arranged on the capstan rim 1b of the capstan 1, and the design principle of (m1+ n1) ═ (m2+ n2) needs to be grasped during design. The more permanent magnets on the driving wheel/driven wheel are arranged, the better the permanent magnets are arranged, and the number of the permanent magnets arranged on the wheel rim is limited by the effective action interval of the magnetic force of the permanent magnets.

The electric rotating device of the utility model comprises an electric device and the magnetic transmission device; the electric device comprises a rotary motor 6, a power supply and a control system, wherein the power supply input end of the motor is connected with the power supply or the control system; when the motor 6 is connected with a control system, the output end of the power supply is connected with the power supply input end of the control system; the magnetic transmission device comprises a driving wheel 1, a driven wheel 3 and a plurality of permanent magnets, and a rotating shaft of the driving wheel is mechanically and fixedly connected with a rotor of a motor 6 in the electric device.

The structural technical scheme that the motor is mechanically and fixedly connected with the driving wheel can be various, for example, the rotating shaft 6a of the shaft output motor 6 is mechanically and fixedly connected with the rotating shaft 1a of the driving wheel 1 along the axial direction (considered as a coaxial shaft), and the structural schematic is shown in fig. 6. The motor can also adopt an outer rotor type, the driving wheel is correspondingly designed into a ring shape, the inner ring is a driving wheel rotating shaft 1a, and the driving wheel rotating shaft 1a of the ring-shaped driving wheel is sleeved on an outer rotor 6b of the motor, as shown in fig. 7 a. Even the outer rotor 6b of the electric motor can be regarded as a modified drive pulley 1, and the permanent magnets 21 are arranged on the outer rotor 6b of the electric motor 1, and one structural solution of the drive pulley 1 and the outer rotor 6b of the electric motor 6 are designed integrally is shown in fig. 7 b.

The utility model discloses in, the arbitrary technological meaning of source form of electric actuator's power does not establish the restriction for the source to electric actuator's power. The power supply of the driving motor can be commercial power alternating current, and also can be wind energy, solar energy or a primary battery and a secondary battery, and the power supply comprises a power supply collected by a control system of the electric device at the load end of the magnetic transmission device through an intelligent control technical method.

The preferred examples described are only recommendations, and several technical solutions can be partially used, or can be added or combined and used with other mature technologies, so that the basic object of the technical solution of the present invention can be achieved.

Examples 1,

A magnetic transmission device is designed, and comprises a driving wheel 1, a driven wheel 3 and 12 permanent magnets. The driving wheel 1 is provided with 4 driving wheel permanent magnets 21 at intervals around the driving wheel rim 1b, the magnetic poles of the 4 driving wheel permanent magnets 21 with the same shape are arranged in an N/S magnetic pole alternating mode along the direction of the driving wheel rotating shaft 1a, the driving wheel permanent magnets 21 are arranged on the outer edge of the driving wheel rim 1b, and the mounting structure is shown in figures 1a and 1 b; the arc length of the driving wheel permanent magnets 21 arranged on the driving wheel 1 along the direction of the tangent line 12 of the rim 1b of the driving wheel is m1, and the distance between the driving wheel permanent magnets 21 is m 2.

The driven wheel 3 is formed by combining circular rings made of two different materials 3b1/3b2, the circular ring 3b2 is made of ABS, the circular ring 3b1 is made of nonmagnetic alloy, 8 driven wheel permanent magnets 23 are arranged around the driven wheel rim 3b at intervals, the magnetic poles of the 8 driven wheel permanent magnets 23 with the same shape are arranged along the direction of the driven wheel rotating shaft 3a in an N/S magnetic pole alternating mode and are embedded into the driven wheel rim 3b for installation, so that the driven wheel permanent magnets 23 are matched with the edge arcs of the driven wheel rim 3b, and the local embedding structure is shown in FIG. 4; the driven wheel permanent magnet 23 arranged on the driven wheel 3 has the arc length n1 along the tangent 12 direction of the driven wheel rim 3b and the spacing n 2.

The permanent magnets 21/23 provided on the primary pulley 1/secondary pulley 3 are arranged so that m1 is m2, and n1 is n 2.

When the permanent magnet 21/23 is installed, the driving wheel 1 and the driven wheel 3 are coaxially and adjacently arranged on different planes in a way of embedding the wheel rims, the gap 4 between the two wheels is 2mm, so that the magnetic pole lines 5 of the permanent magnets 21/23 which periodically face each other and are opposite to each other in rotation are overlapped, and the installation structure is schematically shown in fig. 3. In this embodiment, when the driving wheel 1 rotates, the driving wheel permanent magnet 21 generates a magnetic force action in the direction of the rim tangent 12 on the driven wheel permanent magnet 23, and drives the driven wheel 3 to rotate around the driven wheel rotating shaft 3a, so that the driven wheel 3 obtains a torque transmitted by the magnetic force.

Examples 2,

The structural modification is carried out on the basis of the embodiment 1, wherein 4 driving wheel permanent magnets 21 on the driving wheel 1 are arranged in the same direction of N/S magnetic poles along the direction of the rotating shaft 1a of the driving wheel; on the driven wheel 3, the magnetic poles of 8 driven wheel permanent magnets 23 are also arranged in the same direction of the N/S magnetic pole along the direction of the driven wheel rotating shaft 3 a; when the magnetic pole is installed, the periodically opposite magnetic poles on the driving wheel 1 and the driven wheel 3 are in the same polarity, and the rest structures are unchanged.

The embodiment can also enable the driven wheel to obtain torque through the magnetic transmission of the driving wheel.

Examples 3,

In embodiment 1, the permanent magnets 21/23 provided on the primary pulley 1/the secondary pulley 3 are provided such that m1 is m2, n1 is n2, and in this embodiment, m1 is 4/5 in embodiment 1, but (m1+ n1) is not changed, and the rest of the structure is not changed, and in this embodiment, the secondary pulley 3 can be similarly caused to obtain torque by magnetic transmission of the primary pulley 1.

Examples 4,

The magnetic transmission device of embodiment 1 is provided with one driven wheel 3, the embodiment is provided with two driven wheels 3, and the installation structure of the driving wheel 1 and the two driven wheels 3 is shown in fig. 5. In the embodiment, as the two driven wheels 3 are arranged, the driven wheels can obtain a multiplied torque transmission effect under the magnetic action of the driving wheel 1.

Examples 5,

The magnetic transmission device of embodiment 1 is added to an electric device, which includes an outer rotor type dc rotating motor 6, a power supply and a control system of a primary aluminum air battery pack, and a power supply input terminal of the motor is connected to an output terminal of the power supply. The driving wheel 1 of the magnetic transmission device is driven by the motor 6, wherein the driving wheel 1 is designed to be annular in deformation, the inner ring is used as a rotating shaft 1a, the inner diameter is large enough to be sleeved on an outer rotor 6b of the motor and mechanically connected, as shown in fig. 7 a. The embodiment can meet the requirement of using the device in the area away from the power grid.

Claims (8)

1. A magnetic transmission device is characterized by comprising a driving wheel (1), a driven wheel (3) and a plurality of permanent magnets; the driving wheel (1) is provided with a plurality of driving wheel permanent magnets (21) with magnetic poles arranged along the direction of the rotating shaft (1a) of the driving wheel, and the driving wheel permanent magnets (21) are alternately distributed around the rim (1b) of the driving wheel, the arc length of the driving wheel permanent magnets (21) along the direction of the rim tangent line (12) is m1, and the distance is m 2; the driven wheel (3) is provided with a plurality of driven wheel permanent magnets (23) with magnetic poles arranged along the direction of a driven wheel rotating shaft (3a) at intervals around a driven wheel rim (3b), the arc length of each driven wheel permanent magnet (23) along the direction of a rim tangent line (12) is n1, and the distance between the driven wheel permanent magnets is n 2; a plurality of permanent magnets on the driving wheel (1) and the driven wheel (3) are set to be (m1+ n1) ═ m2+ n 2; the driving wheel (1) and the driven wheel (3) are provided with gaps (4) which are coaxially and adjacently arranged on different planes in a way that the wheel rims are embedded; when the driving wheel (1) rotates, the magnetic poles of a plurality of permanent magnets arranged on the two wheels are periodically opposite, and the driven wheel (3) obtains torque through magnetic transmission.

2. Magnetic transmission device according to claim 1, characterized in that the base body of the driving wheel (1)/driven wheel (3) is formed by fixedly connecting a plurality of layers of annular members of different materials.

3. The magnetic transmission device according to claim 1, characterized in that at least 1 driving wheel (1) and at least 1 driven wheel (3) are arranged in the magnetic transmission device.

4. Magnetic transmission device according to claim 1, characterized in that the permanent magnets arranged on the driving wheel (1)/driven wheel (3) are arranged in the same magnetic pole direction or in an alternating manner of magnetic poles N-S.

5. An electric rotating device based on the magnetic transmission device of claim 1, which comprises an electric device and a magnetic transmission device; the electric device comprises a rotary motor (6), a power supply and a control system, wherein the motor (6) is connected with the power supply or the control system; the magnetic transmission device comprises a driving wheel (1), a driven wheel (3) and a plurality of permanent magnets, wherein the driving wheel (1) is mechanically and fixedly connected with a rotor of a motor (6) in the electric device.

6. An electric rotating device according to claim 5, characterized in that the rotating shaft (6a) of the electric motor (6) is mechanically connected with the rotating shaft (1a) of the driving wheel (1) in the magnetic transmission device.

7. The electrical rotary device according to claim 5, wherein the motor is an outer rotor type, and the driving wheel rotating shaft (1a) of the driving wheel (1) is sleeved on and mechanically fixed to an outer rotor (6b) of the motor.

8. Electric rotating device according to claim 7, characterized in that the outer rotor (6b) of the electric motor is designed integrally with the drive wheel (1).

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