阅读说明：本技术 环板式永磁齿轮变速传动装置 (Ring plate type permanent magnet gear speed change transmission device ) 是由 葛研军 刘东宁 杨均悦 王大明 于 2021-01-22 设计创作，主要内容包括：本发明涉及传动装置技术领域,提供一种环板式永磁齿轮变速传动装置,包括：两个或两个以上的偏心高速轴、一个或一个以上的低速永磁圈以及一个或一个以上的环板永磁圈；当环板永磁圈为一个以上时,多个环板永磁圈平行设置；偏心高速轴通过转臂轴承与环板永磁圈偏心连接；偏心高速轴及转臂轴承位于低速永磁圈的外侧或者内侧；低速永磁圈的中心处安装有低速轴；当偏心高速轴及转臂轴承位于低速永磁圈的外侧时,环板永磁圈上开有圆形中心孔,圆形中心孔的内表面安装一圈内永磁体；低速永磁圈偏心配置在环板永磁圈的圆形中心孔内侧；低速永磁圈的外表面安装一圈外永磁体,外永磁体与内永磁体之间留有空隙。本发明能够提高转臂轴承承载能力。(The invention relates to the technical field of transmission devices, and provides a ring plate type permanent magnet gear variable speed transmission device, which comprises: two or more eccentric high-speed shafts, one or more low-speed permanent magnetic rings and one or more ring plate permanent magnetic rings; when more than one ring plate permanent magnet ring is arranged, the plurality of ring plate permanent magnet rings are arranged in parallel; the eccentric high-speed shaft is eccentrically connected with the ring plate permanent magnet ring through a rotary arm bearing; the eccentric high-speed shaft and the tumbler bearing are positioned at the outer side or the inner side of the low-speed permanent magnet ring; a low-speed shaft is arranged at the center of the low-speed permanent magnet ring; when the eccentric high-speed shaft and the rotary arm bearing are positioned on the outer side of the low-speed permanent magnet ring, a circular central hole is formed in the ring plate permanent magnet ring, and a circle of inner permanent magnet is arranged on the inner surface of the circular central hole; the low-speed permanent magnet ring is eccentrically arranged on the inner side of the circular central hole of the ring plate permanent magnet ring; a circle of outer permanent magnet is arranged on the outer surface of the low-speed permanent magnet ring, and a gap is reserved between the outer permanent magnet and the inner permanent magnet. The invention can improve the load bearing capacity of the tumbler bearing.)

1. A ring plate type permanent magnet gear speed change transmission device is characterized by comprising: two or more eccentric high-speed shafts (3), one or more low-speed permanent magnetic rings (2) and one or more ring plate permanent magnetic rings (5);

when the number of the ring plate permanent magnet rings (5) is more than one, the plurality of ring plate permanent magnet rings (5) are arranged in parallel; the eccentric high-speed shaft (3) is eccentrically connected with the ring plate permanent magnet ring (5) through a rotating arm bearing (9);

the eccentric high-speed shaft (3) and the tumbler bearing (9) are positioned at the outer side or the inner side of the low-speed permanent magnet ring (2); a low-speed shaft (4) is arranged at the center of the low-speed permanent magnet ring (2);

when the eccentric high-speed shaft (3) and the rotating arm bearing (9) are positioned at the outer side of the low-speed permanent magnet ring (2), a circular central hole is formed in the ring plate permanent magnet ring (5), and a circle of inner permanent magnet (1) is installed on the inner surface of the circular central hole; the low-speed permanent magnet ring (2) is eccentrically arranged on the inner side of a circular central hole of the ring plate permanent magnet ring (5); a circle of outer permanent magnet (7) is arranged on the outer surface of the low-speed permanent magnet ring (2), and a gap is reserved between the outer permanent magnet (7) and the inner permanent magnet (1); if the number of the eccentric high-speed shafts (3) is two, the number of the ring plate permanent magnet rings (5) is three or more; if the number of the eccentric high-speed shafts (3) is three or more, the number of the ring plate permanent magnet rings (5) is one or more;

when the eccentric high-speed shaft (3) and the tumbler bearing (9) are positioned on the inner side of the low-speed permanent magnet ring (2), the low-speed permanent magnet ring (2) is positioned on the outer side of the annular plate permanent magnet ring (5); the ring plate permanent magnet ring (5) is not concentric with the low-speed permanent magnet ring (2); a circle of outer permanent magnet (7) is arranged on the surface of the outer ring of the ring plate permanent magnet ring (5); a circle of inner permanent magnet (1) is arranged on the inner surface of the low-speed permanent magnet ring (2) corresponding to the ring plate permanent magnet ring (5); a gap is reserved between the outer permanent magnet (7) and the inner permanent magnet (1); if the number of the eccentric high-speed shaft (3) and the tumbler bearings (9) is three or more, the number of the ring plate permanent magnet rings (5) is one or more.

2. A ring plate permanent magnet gear change transmission according to claim 1, characterized in that both ends of the eccentric high speed shaft (3) are supported by high speed bearings (6).

3. An annular plate type permanent magnet gear speed change transmission device according to claim 2, characterized in that the eccentric high speed shaft (3) is used for connecting a power source.

4. A ring plate permanent magnet gear change transmission according to claim 1, characterized in that the low speed shaft (4) is supported by a low speed bearing (8).

Technical Field

The invention relates to the technical field of transmission devices, in particular to a ring plate type permanent magnet gear variable speed transmission device.

Background

The gear transmission is the most important of mechanical transmission, and is also a mechanical transmission form which is widely applied, and marks the technical level of mechanical engineering to a certain extent. The existing mechanical gear transmission with small tooth difference is more and more favored by the modern industrial technology due to the characteristics of large transmission ratio, compact structure, small size, light weight, high efficiency and the like.

The mechanical gear transmission with small tooth difference has the defects of high processing precision and manufacturing cost; when the machining precision does not meet the requirement, the gear teeth are not meshed correctly, and the defects of too fast gear teeth abrasion, large transmission noise and the like occur during transmission; when the mechanical gear with small tooth difference works under the overload condition, the phenomenon of breaking the gear teeth also occurs; in addition, the mechanical gear with small tooth difference also needs lubricating oil and an auxiliary cooling circulation system thereof, and when the cooling circulation system fails, the temperature of the lubricating oil is increased, so that the gear teeth are glued or pitted. Furthermore, the tumbler bearings that the small tooth difference mechanical gear must have are generally installed inside the inner gear ring, and the eccentric motion of the inner gear ring will seriously shorten the service life of the tumbler bearings.

Disclosure of Invention

The invention mainly solves the problems of large transmission noise, gear tooth abrasion, breakage and the like of the existing mechanical gear with small tooth difference, provides the annular plate type permanent magnet gear variable speed transmission device, adopts the permanent magnet gear without mechanical contact, does not need a lubricating and cooling system necessary for mechanical gear transmission, does not have the phenomena of gluing and pitting corrosion of the mechanical gear, and improves the reliability of the device; the tumbler bearing is not limited by the structure space, the using number of the tumbler bearings can be increased, the effective load born by the tumbler bearing is dispersed, and the service life and the bearing capacity of the tumbler bearing are improved.

The invention provides a ring plate type permanent magnet gear variable speed transmission device, comprising: two or more eccentric high-speed shafts, one or more low-speed permanent magnetic rings and one or more ring plate permanent magnetic rings;

when more than one ring plate permanent magnet ring is arranged, the plurality of ring plate permanent magnet rings are arranged in parallel; the eccentric high-speed shaft is eccentrically connected with the ring plate permanent magnet ring through a rotary arm bearing;

the eccentric high-speed shaft and the tumbler bearing are positioned at the outer side or the inner side of the low-speed permanent magnet ring; a low-speed shaft is arranged at the center of the low-speed permanent magnet ring;

when the eccentric high-speed shaft and the rotary arm bearing are positioned on the outer side of the low-speed permanent magnet ring, a circular central hole is formed in the ring plate permanent magnet ring, and a circle of inner permanent magnet is arranged on the inner surface of the circular central hole; the low-speed permanent magnet ring is eccentrically arranged on the inner side of the circular central hole of the ring plate permanent magnet ring; a circle of outer permanent magnet is arranged on the outer surface of the low-speed permanent magnet ring, and a gap is reserved between the outer permanent magnet and the inner permanent magnet; if the number of the eccentric high-speed shafts is two, the number of the ring plate permanent magnet rings is three or more; if the number of the eccentric high-speed shafts is three or more, the number of the ring plate permanent magnet rings is one or more;

when the eccentric high-speed shaft and the rotary arm bearing are positioned on the inner side of the low-speed permanent magnet ring, the low-speed permanent magnet ring is positioned on the outer side of the ring plate permanent magnet ring; the ring plate permanent magnet ring and the low-speed permanent magnet ring are not concentric; a circle of outer permanent magnet is arranged on the surface of the outer ring of the ring plate permanent magnet ring; a circle of inner permanent magnet is arranged on the inner surface of the low-speed permanent magnet ring at the position corresponding to the ring plate permanent magnet ring; a gap is reserved between the outer permanent magnet and the inner permanent magnet; if the number of the eccentric high-speed shaft and the tumbler bearing is three or more, the number of the ring plate permanent magnet rings is one or more.

Preferably, both ends of the eccentric high-speed shaft are supported by high-speed bearings.

Preferably, the eccentric high-speed shaft is used for connecting a power source.

Preferably, the low speed shaft is supported by a low speed bearing.

According to the annular plate type permanent magnet gear variable speed transmission device provided by the invention, the permanent magnet gear has the advantages of non-contact transmission, overload protection and the like, and the problems of high transmission noise, gear tooth abrasion, breakage and the like of the conventional mechanical gear with small tooth difference can be better solved; because the permanent magnetic gear is not in mechanical contact, lubricating oil is not needed, a lubricating and cooling system which is necessary for mechanical gear transmission is not needed, the phenomena of gluing and pitting corrosion of the mechanical gear are avoided, and the reliability of the device is improved. In addition, the annular plate type permanent magnet gear variable speed transmission device provided by the invention has the advantages that the tumbler bearing is arranged on the eccentric high-speed shaft, the tumbler bearing can be moved to the outside of the inner gear ring, the tumbler bearing is not limited by the structural space, the number of the tumbler bearings can be increased, the effective load born by the tumbler bearing is dispersed, and the service life and the bearing capacity of the tumbler bearing are improved.

Drawings

Fig. 1 is a schematic structural diagram of a ring plate type permanent magnet gear speed change transmission device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a ring plate permanent magnet variable speed transmission according to one embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first ring plate type permanent magnet gear speed change transmission device according to a second embodiment of the present invention;

fig. 4 is a cross-sectional view of a first structure of a ring plate type permanent magnet gear speed change transmission device according to a second embodiment of the present invention;

fig. 5 is a schematic structural diagram of a second ring plate type permanent magnet gear speed change transmission device according to a second embodiment of the present invention;

fig. 6 is a sectional view of a second ring plate type permanent magnet gear speed change transmission structure provided in a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a third ring plate type permanent magnet gear speed change transmission device according to a second embodiment of the present invention;

fig. 8 is a sectional view of a third ring plate type permanent magnet gear speed change transmission structure provided by a second embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first structure of a ring plate type permanent magnet gear speed change transmission device according to a third embodiment of the present invention;

fig. 10 is a cross-sectional view of a first structure of a ring plate type permanent magnet gear change transmission according to a third embodiment of the present invention;

fig. 11 is a schematic structural diagram of a second ring plate type permanent magnet gear speed change transmission device according to a third embodiment of the present invention;

fig. 12 is a sectional view of a second structure of a ring plate type permanent magnet gear shift transmission according to a third embodiment of the present invention;

fig. 13 is a schematic structural diagram of a third ring plate type permanent magnet gear speed change transmission device according to a third embodiment of the present invention;

fig. 14 is a sectional view of a third ring plate type permanent magnet gear speed change transmission structure provided by a third embodiment of the present invention.

Reference numerals: 1. the permanent magnet bearing comprises an inner permanent magnet, 2 low-speed permanent magnet rings, 3 eccentric high-speed shafts, 4 low-speed shafts, 5 annular plate permanent magnet rings, 6 high-speed bearings, 7 outer permanent magnets, 8 low-speed bearings, 9 rotating arm bearings.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.

Example one

As shown in fig. 1-2, a ring plate type permanent magnet gear shifting transmission device according to a first embodiment of the present invention includes: two eccentric high-speed shafts 3, three or more low-speed permanent magnetic rings 2 and three or more ring plate permanent magnetic rings 5.

Three or more than three ring plate permanent magnet rings 5 are arranged in parallel; the two eccentric high-speed shafts 3 are eccentrically connected with the ring plate permanent magnet ring 5 through the tumbler bearings 9. Both ends of the eccentric high-speed shaft 3 are supported by high-speed bearings 6.

In the present embodiment, the eccentric high-speed shaft 3 and the rocker bearing 9 are located outside the low-speed permanent magnet ring 2; the two eccentric high-speed shafts 3 are respectively arranged on two sides of the ring plate permanent magnet ring 5; the center of the low-speed permanent magnet ring 2 is provided with a low-speed shaft 4, and the low-speed shaft 4 is supported by a low-speed bearing 8. The low-speed shaft 4 is used for connecting a low-speed heavy load and transmitting the rotating speed and the torque to the low-speed heavy load.

A circular central hole is formed in the ring plate permanent magnet ring 5, and a circle of inner permanent magnets 1 are arranged on the inner surface of the circular central hole; the low-speed permanent magnet ring 2 is eccentrically arranged on the inner side of a circular central hole of the ring plate permanent magnet ring 5; a circle of outer permanent magnet 7 is arranged on the outer surface of the low-speed permanent magnet ring 2, and a gap is reserved between the outer permanent magnet 7 and the inner permanent magnet 1; specifically, dovetail grooves are formed in the outer surface of the low-speed permanent magnet ring 2 and the inner surface of the circular center hole of the ring plate permanent magnet ring 5; the outer permanent magnet 7 and the inner permanent magnet 1 are wedge-shaped, and the outer permanent magnet 7 and the inner permanent magnet 1 are arranged in corresponding dovetail grooves.

The eccentric high-speed shaft 3 is used for connecting a power source and transmitting power through one or more shafts (simultaneously). The power source is, for example, an electric motor.

The basic type of the speed change transmission device of the present embodiment is: the number of the low-speed shafts 4 is one, the number of the eccentric high-speed shafts 3 is two, the number of the ring plate permanent magnet rings 5 is at least three, and the number of the ring plate permanent magnet rings 5 can be more than three. The number of the eccentric high-speed shaft 3, the tumbler bearing 9, the ring plate permanent magnet ring 5 and the low-speed permanent magnet ring 2 is increased or the positions of the eccentric high-speed shaft, the tumbler bearing and the ring plate permanent magnet ring are changed to form a plurality of derivative types.

The motion principle of the ring plate type permanent magnet gear speed change transmission device provided by the embodiment is as follows: when the eccentric high-speed shaft 3 drives the ring plate permanent magnet ring 5 to transmit, the inner permanent magnet 1 swings around the outer permanent magnet 7, and the outer permanent magnet 7 embedded in the low-speed permanent magnet ring 2 rotates under the change of magnetic field force due to the change of the relative positions of the two permanent magnets, and drives the low-speed shaft 4 to rotate. Because the forced positions of the outer permanent magnet 7 and the inner permanent magnet 1 are opposite to the relative position of the ring plate permanent magnet ring 5, but the forced direction is the same as the swinging direction of the ring plate permanent magnet ring 5, the rotating directions of the eccentric high-speed shaft 3 and the low-speed shaft 4 are opposite.

The ring plate permanent magnet ring 5 swings by taking a round point of the low-speed permanent magnet ring 2 as a center and taking the eccentricity as a radius; the low-speed permanent magnet ring 2 rotates around a self round point; because the difference between the eccentricity and the radius of the low-speed permanent magnet ring 2 is larger, a larger transmission ratio can be realized.

Example two

As shown in fig. 3 to 8, a ring plate type permanent magnet gear shift transmission device according to a second embodiment of the present invention includes: three or more eccentric high-speed shafts 3, one or more low-speed permanent magnet rings 2 and one or more annular plate permanent magnet rings 5.

In the embodiment, three variable speed transmission structures are provided, wherein one structure is that three eccentric high-speed shafts 3, three low-speed permanent magnetic rings 2 and a ring plate permanent magnetic ring 5 are arranged as shown in figures 3-4; the second structure is that four eccentric high-speed shafts 3, three low-speed permanent magnet rings 2 and a ring plate permanent magnet ring 5 are arranged as shown in figures 5-6; the third structure is that six eccentric high-speed shafts 3, three low-speed permanent magnet rings 2 and a ring plate permanent magnet ring 5 are arranged as shown in figures 7-8.

The three ring plate permanent magnet rings 5 are arranged in parallel; three or more than three eccentric high-speed shafts 3 are eccentrically connected with the ring plate permanent magnet ring 5 through the tumbler bearings 9. Both ends of the eccentric high-speed shaft 3 are supported by high-speed bearings 6.

In the present embodiment, the eccentric high-speed shaft 3 and the rocker bearing 9 are located outside the low-speed permanent magnet ring 2; the center of the low-speed permanent magnet ring 2 is provided with a low-speed shaft 4, and the low-speed shaft 4 is supported by a low-speed bearing 8. The low-speed shaft 4 is used for connecting a low-speed heavy load and transmitting the rotating speed and the torque to the low-speed heavy load.

A circular central hole is formed in the ring plate permanent magnet ring 5, and a circle of inner permanent magnets 1 are arranged on the inner surface of the circular central hole; the low-speed permanent magnet ring 2 is arranged on the inner side of a circular central hole of the ring plate permanent magnet ring 5; the circular central hole of the ring plate permanent magnet ring 5 is not concentric with the low-speed permanent magnet ring 2; a circle of outer permanent magnet 7 is arranged on the outer surface of the low-speed permanent magnet ring 2, and a gap is reserved between the outer permanent magnet 7 and the inner permanent magnet 1; specifically, dovetail grooves are formed in the outer surface of the low-speed permanent magnet ring 2 and the inner surface of the circular center hole of the ring plate permanent magnet ring 5; the outer permanent magnet 7 and the inner permanent magnet 1 are wedge-shaped, and the outer permanent magnet 7 and the inner permanent magnet 1 are arranged in corresponding dovetail grooves.

The eccentric high-speed shaft 3 is used for connecting a power source and transmitting power through one or more shafts (simultaneously). The power source is, for example, an electric motor.

The basic type of the speed change transmission device of the present embodiment is: the number of the low-speed shafts 4 is at least three, the number of the eccentric high-speed shafts 3 is at least three, the number of the ring plate permanent magnet rings 5 is at least one, and the number of the ring plate permanent magnet rings 5 can also be multiple. The number of the eccentric high-speed shaft 3, the tumbler bearing 9, the ring plate permanent magnet ring 5 and the low-speed permanent magnet ring 2 is increased or the positions of the eccentric high-speed shaft, the tumbler bearing and the ring plate permanent magnet ring are changed to form a plurality of derivative types.

The motion principle of the ring plate type permanent magnet gear speed change transmission device provided by the embodiment is as follows: when the eccentric high-speed shaft 3 drives the ring plate permanent magnet ring 5 to transmit, the inner permanent magnet 1 swings around the outer permanent magnet 7, and the outer permanent magnet 7 embedded in the low-speed permanent magnet ring 2 rotates under the change of magnetic field force due to the change of the relative positions of the two permanent magnets, and drives the low-speed shaft 4 to rotate. Because the forced positions of the outer permanent magnet 7 and the inner permanent magnet 1 are opposite to the relative position of the ring plate permanent magnet ring 5, but the forced direction is the same as the swinging direction of the ring plate permanent magnet ring 5, the rotating directions of the eccentric high-speed shaft 3 and the low-speed shaft 4 are opposite.

The ring plate permanent magnet ring 5 swings by taking a round point of the low-speed permanent magnet ring 2 as a center and taking the eccentricity as a radius; the low-speed permanent magnet ring 2 rotates around a self round point; because the difference between the eccentricity and the radius of the low-speed permanent magnet ring 2 is larger, a larger transmission ratio can be realized.

EXAMPLE III

As shown in fig. 9 to 14, a third embodiment of the present invention provides a ring plate type permanent magnet gear shift transmission device, including: three or more eccentric high-speed shafts 3, one or more low-speed permanent magnet rings 2 and one or more annular plate permanent magnet rings 5.

In the present embodiment, three variable speed transmission configurations are given, one configuration in which three eccentric high speed shafts 3 and tumbler bearings 9, one low speed permanent magnet ring 2 and a ring plate permanent magnet ring 5 are provided as shown in fig. 9-10; the second structure is that as shown in fig. 11-12, four eccentric high-speed shafts 3 and tumbler bearings 9, a low-speed permanent magnet ring 2 and a ring plate permanent magnet ring 5 are arranged; the third structure is that as shown in fig. 13-14, six eccentric high-speed shafts 3 and tumbler bearings 9, a low-speed permanent magnet ring 2 and a ring plate permanent magnet ring 5 are arranged.

One or more than one ring plate permanent magnet ring 5 are arranged in parallel; three or more than three eccentric high-speed shafts 3 are eccentrically connected with the ring plate permanent magnet ring 5 through the tumbler bearings 9. Both ends of the eccentric high-speed shaft 3 are supported by high-speed bearings 6.

In the present embodiment, the eccentric high-speed shaft 3 and the rocker bearing 9 are located inside the low-speed permanent magnet ring 2; the center of the low-speed permanent magnet ring 2 is provided with a low-speed shaft 4, and the low-speed shaft 4 is supported by a low-speed bearing 8. The low-speed shaft 4 is used for connecting a low-speed heavy load and transmitting the rotating speed and the torque to the low-speed heavy load.

The low-speed permanent magnet ring 2 is positioned on the outer side of the ring plate permanent magnet ring 5; the ring plate permanent magnet ring 5 is not concentric with the low-speed permanent magnet ring 2; a circle of outer permanent magnet 7 is arranged on the surface of the outer ring of the ring plate permanent magnet ring 5; a circle of inner permanent magnet 1 is arranged on the inner surface of the low-speed permanent magnet ring 2 corresponding to the ring plate permanent magnet ring 5; a gap is reserved between the outer permanent magnet 7 and the inner permanent magnet 1; specifically, dovetail grooves are formed in the inner surface of the low-speed permanent magnet ring 2, which corresponds to the ring plate permanent magnet ring 5, and the outer ring surface of the ring plate permanent magnet ring 5; the outer permanent magnet 7 and the inner permanent magnet 1 are wedge-shaped, and the outer permanent magnet 7 and the inner permanent magnet 1 are arranged in corresponding dovetail grooves.

The eccentric high-speed shaft 3 is used for connecting a power source and transmitting power through one or more shafts (simultaneously). The power source is, for example, an electric motor.

The basic type of the speed change transmission device of the present embodiment is: the number of the low-speed shafts 4 is at least three, the number of the eccentric high-speed shafts 3 is at least three, the number of the ring plate permanent magnet rings 5 is at least one, and the number of the ring plate permanent magnet rings 5 can also be multiple. The number of the eccentric high-speed shaft 3, the tumbler bearing 9, the ring plate permanent magnet ring 5 and the low-speed permanent magnet ring 2 is increased or the positions of the eccentric high-speed shaft, the tumbler bearing and the ring plate permanent magnet ring are changed to form a plurality of derivative types.

The motion principle of the ring plate type permanent magnet gear speed change transmission device provided by the embodiment is as follows: when the eccentric high-speed shaft 3 drives the ring plate permanent magnet ring 5 to transmit, the outer permanent magnet 7 swings around the inner permanent magnet 1, and the inner permanent magnet 1 embedded in the low-speed permanent magnet ring 2 rotates under the change of magnetic field force due to the change of the relative positions of the two permanent magnets, and drives the low-speed shaft 4 to rotate. The stress positions of the low-speed permanent magnet ring 2 and the ring plate permanent magnet ring 5 are the same as the relative positions of the low-speed permanent magnet ring and the ring plate permanent magnet ring, and the stress direction is the same as the swinging direction of the ring plate permanent magnet ring 5, so that the rotating directions of the eccentric high-speed shaft 3 and the low-speed shaft 4 are the same.

The ring plate permanent magnet ring 5 swings by taking a round point of the low-speed permanent magnet ring 2 as a center and taking the eccentricity as a radius; the low-speed permanent magnet ring 2 rotates around a self round point; because the difference between the eccentricity and the radius of the low-speed permanent magnet ring 2 is larger, a larger transmission ratio can be realized.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some or all technical features may be made without departing from the scope of the technical solutions of the embodiments of the present invention.