CN113937979A

CN113937979A - Permanent magnet gear speed change device

Info

Publication number: CN113937979A
Application number: CN202110267678.6A
Authority: CN
Inventors: 罗帅; 鲁仰辉; 于成伟; 魏立军; 李高盛; 严帅; 曹菡; 边卓伟
Original assignee: State Power Investment Group Science and Technology Research Institute Co Ltd
Current assignee: State Power Investment Group Science and Technology Research Institute Co Ltd
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2022-01-14
Anticipated expiration: 2041-03-11
Also published as: CN113937979B

Abstract

The invention provides a permanent magnet gear speed change device which comprises an outer support bearing and an inner support bearing, wherein the outer support bearing is sleeved on an input shaft, and the inner support bearing is matched between the input shaft and an output shaft in the radial direction of an inner magnetic ring, so that the size requirements of the outer support bearing and the inner support bearing are not high, the permanent magnet gear speed change device is particularly suitable for large-diameter permanent magnet gear speed change devices, and the requirements of large torque and large size of hundred kilowatt-level permanent magnet gear speed change devices can be met. In addition, the arrangement of the inner support bearing and the outer support bearing ensures the coaxiality of the permanent magnet gear speed change device, simultaneously ensures the stability of air gaps between the inner magnetic ring and the magnetic adjusting ring and between the magnetic adjusting ring and the outer magnetic ring, avoids the rubbing of the inner magnetic ring and the magnetic adjusting ring during rotation, and ensures the operation performance and the operation stability of the permanent magnet gear speed change device. Therefore, the permanent magnet gear speed change device has the advantages of being high in structural stability and high in coaxiality.

Description

Permanent magnet gear speed change device

Technical Field

The invention relates to the technical field of permanent magnet gears, in particular to a permanent magnet gear speed changing device.

Background

The permanent magnet gear speed change device is widely applied to the field of transmission, and the driving wheel and the driven wheel are not in physical contact, but are driven by the acting force of the permanent magnet magnetic field piece, so the permanent magnet gear speed change device is an ideal choice in the field of transmission and has the advantages of good performance and high reliability. Permanent magnet transmissions comprise three main components: one of the inner magnetic ring, the outer magnetic ring and the magnetic adjusting ring is fixed, and the other two parts are used as rotors to realize the speed and power ratio changing function. In the related art, the magnetic adjusting ring is usually a cantilever beam structure with only one end supported, and when the magnetic adjusting ring is used as a rotor, the magnetic adjusting ring usually jumps under the action of centrifugal force or a magnetic field between an inner magnetic ring and an outer magnetic ring, so that the stable operation of the permanent magnet gear speed changing device is influenced.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a permanent magnet gear speed changing device with high structural stability and high coaxiality.

According to an embodiment of the present invention, a permanent magnet gear transmission device includes: the magnetic ring comprises an inner magnetic ring, a magnetic adjusting ring and an outer magnetic ring, wherein the inner magnetic ring, the magnetic adjusting ring and the outer magnetic ring are coaxially sleeved from inside to outside and are spaced from each other; the magnetic adjusting ring is in transmission connection with the output shaft, and the input shaft, the output shaft and the inner magnetic ring are coaxial; the outer support bearing is sleeved on the input shaft; the first magnetic adjusting ring flange and the second magnetic adjusting ring flange are connected with the magnetic adjusting ring and are respectively positioned on two sides of the inner magnetic ring in the axial direction of the inner magnetic ring, the first magnetic adjusting ring flange is sleeved on the output shaft and is connected with the output shaft so that the magnetic adjusting ring is in transmission connection with the output shaft, and the second magnetic adjusting ring flange is sleeved on the outer support bearing so that the input shaft can rotate relative to the second magnetic adjusting ring flange; an inner support bearing fitted between the input shaft and the output shaft in a radial direction of the inner ring.

The permanent magnet gear speed change device comprises an outer support bearing and an inner support bearing, wherein the outer support bearing is sleeved on the input shaft, and the inner support bearing is matched between the input shaft and the output shaft in the radial direction of the inner magnetic ring, so that the size requirements of the outer support bearing and the inner support bearing are not high, the permanent magnet gear speed change device is particularly suitable for large-diameter permanent magnet gear speed change devices, and the requirements of large torque and large size of a hundred kilowatt permanent magnet gear speed change device can be met. This is because, if the outer support bearing is sleeved on the magnetic adjustment ring to support the magnetic adjustment ring, the outer support bearing needs a larger size, thereby increasing the cost and the manufacturing difficulty.

In addition, the arrangement of the inner support bearing and the outer support bearing ensures the coaxiality of the permanent magnet gear speed change device, simultaneously ensures the stability of air gaps between the inner magnetic ring and the magnetic adjusting ring and between the magnetic adjusting ring and the outer magnetic ring, avoids the rubbing of the inner magnetic ring and the magnetic adjusting ring during rotation, and ensures the operation performance and the operation stability of the permanent magnet gear speed change device.

Therefore, the permanent magnet gear speed change device has the advantages of being high in structural stability and high in coaxiality.

In some embodiments, the inner magnetic ring comprises an inner magnetic ring permanent magnet, an inner magnetic ring iron core and an inner magnetic ring cylinder which are sequentially connected from outside to inside, and the outer magnetic ring comprises an outer magnetic ring permanent magnet, an outer magnetic ring iron core and an outer magnetic ring cylinder which are sequentially connected from inside to outside.

In some embodiments, the permanent magnet gear shifting device further comprises an inner magnetic ring flange, wherein the inner magnetic ring flange is sleeved on the input shaft and connected with the inner magnetic ring cylinder body so that the inner magnetic ring is in transmission connection with the input shaft.

In some embodiments, the first end of the output shaft is provided with a groove, the first end of the input shaft extends into the groove along the axial direction of the inner magnetic ring, the inner support bearing is located in the groove and sleeved on the first end of the input shaft, or the first end of the input shaft is provided with a groove, the first end of the output shaft extends into the groove along the axial direction of the inner magnetic ring, and the inner support bearing is located in the groove and sleeved on the first end of the output shaft.

In some embodiments, the inner magnetic ring includes an inner magnetic ring permanent magnet and an inner magnetic ring core, the inner magnetic ring permanent magnet being disposed on an outer circumferential surface of the inner magnetic ring core, the outer magnetic ring includes an outer magnetic ring permanent magnet and an outer magnetic ring core, the outer magnetic ring permanent magnet being disposed on an inner circumferential surface of the outer magnetic ring core; wherein the permanent magnet gear change further comprises: a first magnetic shield ring and a second magnetic shield ring, the inner magnet ring permanent magnet being located between the first magnetic shield ring and the second magnetic shield ring in an axial direction of the inner magnet ring so as to shield an end magnetic field of the inner magnet ring permanent magnet; and/or a third magnetic shielding ring and a fourth magnetic shielding ring, wherein the outer magnetic ring permanent magnet is positioned between the third magnetic shielding ring and the fourth magnetic shielding ring in the axial direction of the inner magnetic ring so as to shield the end magnetic field of the outer magnetic ring permanent magnet.

In some embodiments, the first magnetic shielding ring and the second magnetic shielding ring are formed by stacking a plurality of first silicon steel sheets, adjacent first silicon steel sheets are bonded and separated from each other through a non-conductive adhesive layer, the third magnetic shielding ring and the fourth magnetic shielding ring are formed by stacking a plurality of second silicon steel sheets, and adjacent second silicon steel sheets are bonded and separated from each other through a non-conductive adhesive layer.

In some embodiments, the inner magnet ring permanent magnet and the inner magnet ring core each have a first end face and a second end face opposite to each other in the axial direction of the inner magnet ring, the first end face of the inner magnet ring permanent magnet is flush with the first end face of the inner magnet ring core, the second end face of the inner magnet ring permanent magnet is flush with the second end face of the inner magnet ring core, the first magnetic shielding ring is in contact with both the first end face of the inner magnet ring permanent magnet and the first end face of the inner magnet ring core, and the second magnetic shielding ring is in contact with both the second end face of the inner magnet ring permanent magnet and the second end face of the inner magnet ring core; the outer magnetic ring permanent magnet and the outer magnetic ring iron core are respectively provided with a first end face and a second end face which are opposite in the axial direction of the inner magnetic ring, the first end face of the outer magnetic ring permanent magnet is flush with the first end face of the outer magnetic ring iron core, the second end face of the outer magnetic ring permanent magnet is flush with the second end face of the outer magnetic ring iron core, the third magnetic shielding ring is in contact with the first end face of the outer magnetic ring permanent magnet and the first end face of the outer magnetic ring iron core, and the fourth magnetic shielding ring is in contact with the second end face of the outer magnetic ring permanent magnet and the second end face of the outer magnetic ring iron core.

In some embodiments, the magnetic tuning ring comprises: the framework comprises a first end ring and a second end ring which are opposite in the axial direction of the pouring type magnetic adjusting ring, and further comprises a plurality of reinforcing columns which are arranged at intervals along the circumferential direction of the pouring type magnetic adjusting ring, the first end of each reinforcing column is connected with the first end ring, and the second end of each reinforcing column is connected with the second end ring; and the magnetic conduction blocks are arranged at intervals along the circumferential direction of the pouring type magnetic regulation ring and are positioned between the first end ring and the second end ring in the axial direction of the pouring type magnetic regulation ring, a pouring gap is formed between every two adjacent magnetic conduction blocks, and a non-magnetic conduction pouring body is filled in the pouring gap so as to be convenient for the pouring body to be poured on the framework and the magnetic conduction blocks.

In some embodiments, at least a portion of the reinforcing columns form a plurality of reinforcing column groups arranged at intervals in sequence along the circumferential direction of the cast magnetic adjusting ring, each reinforcing column group includes a first reinforcing column and a second reinforcing column, the plurality of magnetic conduction blocks and the plurality of reinforcing column groups correspond to each other one by one, and each magnetic conduction block is sandwiched between the first reinforcing column and the second reinforcing column of the reinforcing column group corresponding to the magnetic conduction block.

In some embodiments, the first reinforcing column and the second reinforcing column in each pair of the reinforcing column sets are arranged inside and outside, each magnetic conduction block is located between the first reinforcing column and the second reinforcing column of the corresponding reinforcing column set in the radial direction of the cast magnetic conduction ring, the outer side face of each magnetic conduction block is provided with a first positioning groove, at least a part of the first reinforcing column is matched in the first positioning groove, the inner side face of each magnetic conduction block is provided with a second positioning groove, and at least a part of the second reinforcing column is matched in the second positioning groove;

or the first reinforcing columns and the second reinforcing columns in each pair of reinforcing column groups are arranged at intervals along the circumferential direction of the cast magnetic adjusting ring, each magnetic conduction block is located between the first reinforcing columns and the second reinforcing columns of the corresponding reinforcing column group in the circumferential direction of the cast magnetic adjusting ring, the magnetic conduction blocks are provided with a first side surface and a second side surface which are opposite in the circumferential direction of the cast magnetic adjusting ring, the first side surface is provided with a first positioning groove, at least one part of each first reinforcing column is matched in the first positioning groove, the second side surface is provided with a second positioning groove, and at least one part of each second reinforcing column is matched in the second positioning groove.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a magnetic tuning ring according to a first embodiment of the present invention.

Fig. 2 is a partial sectional view of the magnetic tuning ring in the embodiment of fig. 1.

Fig. 3 is a schematic structural diagram of the magnetic conductive block in the embodiment of fig. 1.

Fig. 4 is a cross-sectional view of the flux block of fig. 2.

Fig. 5 is a schematic structural view of the ring body in the embodiment of fig. 1.

Fig. 6 is a composition structure of the magnetic conductive block in the embodiment of fig. 1.

Fig. 7 is a schematic structural diagram of a fixing block in the embodiment of fig. 1.

Fig. 8 is a schematic structural view of the collar in the embodiment of fig. 1.

Fig. 9 is another structural schematic diagram of a middle tuning magnetic ring according to an embodiment of the invention.

Fig. 10 is a schematic structural view of a pouring type magnet adjusting ring according to a second embodiment of the present invention.

Fig. 11 is a partial cross-sectional view of a poured dimming ring in the embodiment of fig. 10.

FIG. 12 is a schematic view of the reinforcing column of the embodiment of FIG. 10.

Figure 13 is a schematic diagram of the structure of the first end ring in the embodiment of figure 10.

Fig. 14 is a schematic structural view of the second end ring in the embodiment of fig. 10.

Fig. 15 is a schematic structural view of the magnetic conductive block in the embodiment of fig. 10.

Fig. 16 is a schematic structural view of the magnetic block and the positioning column in the embodiment of fig. 10.

Fig. 17 is a schematic view of the structure of the reinforcing spacer ring in the embodiment of fig. 10.

Fig. 18 is a schematic structural view of a permanent magnet gear change device according to a third embodiment of the present invention.

Fig. 19 is a schematic structural view of a permanent magnet gear change device according to a fourth embodiment of the present invention.

Fig. 20 is a schematic structural view of a permanent magnet gear change device according to a fifth embodiment of the present invention.

Fig. 21 is a transmission efficiency curve of the permanent magnet gear transmission according to the fifth embodiment of the present invention.

Fig. 22 is a schematic structural view of a magnetic shield ring according to a fifth embodiment of the present invention.

Fig. 23 is a schematic structural view of a permanent magnet gear change device according to a sixth embodiment of the present invention.

Reference numerals:

a magnetic regulating ring 001; casting type magnetic adjusting ring 002; a permanent magnet gear change 003; an inner magnetic ring 004; an inner magnetic ring permanent magnet 0041; an inner magnetic ring core 0042; an inner magnetic ring cylinder 0043; an outer magnetic ring 005; an outer magnetic ring permanent magnet 0051; an outer magnetic ring iron core 0052; an outer magnetic ring cylinder 0053; an input shaft 0061; an output shaft 0062; an outer support bearing 0071; inner support bearings 0072; an inner magnetic ring flange 0081; magnetic adjusting ring flange 0082; a first magnetic adjustment ring flange 0091; a second magnetic adjustment ring flange 0092; a ring body 100; a mounting groove 110; a trough section 120; a first end ring 130 a; a second endring 140 a; a division bar 150; a magnetic conductive block 200 a; a first dovetail 210; an intermediate portion 220; a second dovetail 230; a sheet 240 of soft magnetic material; a non-conductive adhesive layer 250; a fixed block 300; a collar 400; a skeleton 0011; a magnetic conduction block 200; a magnetic conduction block 200 b; a first side 201; a first detent 2011; a second side 202; a second positioning groove 2021; a first end ring 130 b; a first threaded hole 131; a low speed shaft mounting hole 132; a second endring 140 b; the second screw hole 141; a reinforcing column 510; the first reinforcing column 511; a second reinforcing column 512; a casting 520; a reinforcing spacer 530; positioning holes 532; pouring holes 540; a first magnetic shield ring 610; a second magnetic shield ring 620; a third magnetic shield ring 630; a fourth magnetic shield ring 640, silicon steel sheets 631; a non-conductive adhesive layer 632;

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A permanent magnet gear change device 003 of the embodiment of the present invention is described below with reference to fig. 19. The permanent magnet gear shifting device 003 of the present embodiment is particularly suitable for a large-diameter permanent magnet gear shifting device 003.

The permanent magnet gear speed change device 003 comprises an inner magnetic ring 004, a magnetic adjusting ring 001 and an outer magnetic ring 005 which are coaxially sleeved from inside to outside and are spaced from each other, an input shaft 0061, an output shaft 0062, an outer support bearing 0071, a first magnetic adjusting ring flange 0091, a second magnetic adjusting ring flange 0092, an inner support bearing 0072 and an inner magnetic ring flange 0081.

The inner magnetic ring 004 comprises an inner magnetic ring permanent magnet 0041, an inner magnetic ring iron core 0042 and an inner magnetic ring cylinder 0043, wherein the inner magnetic ring permanent magnet 0041 is arranged on the peripheral surface of the inner magnetic ring iron core 0042, and the inner magnetic ring iron core 0042 is sleeved on the inner magnetic ring cylinder 0043. That is, the inner magnetic ring permanent magnet 0041, the inner magnetic ring iron core 0042, and the inner magnetic ring cylinder 0043 are sequentially connected from the outside to the inside. The inner magnetic ring permanent magnet 0041 is connected with the outer peripheral surface of the inner magnetic ring iron core 0042, and the inner magnetic ring cylinder 0043 is connected with the inner peripheral surface of the inner magnetic ring iron core 0042.

The outer magnetic ring 005 includes an outer magnetic ring permanent magnet 0051, an outer magnetic ring iron core 0052 and an outer magnetic ring cylinder 0053, the outer magnetic ring permanent magnet 0051 is provided on the inner peripheral surface of the outer magnetic ring iron core 0052, and the outer magnetic ring cylinder 0053 is fitted over the outer magnetic ring iron core 0052. That is, the outer magnetic ring permanent magnet 0051, the outer magnetic ring iron core 0052 and the outer magnetic ring cylinder 0053 are connected in this order from the inside to the outside, the outer magnetic ring permanent magnet 0051 is connected to the inner peripheral surface of the outer magnetic ring iron core 0052, and the outer magnetic ring cylinder 0053 is connected to the outer peripheral surface of the outer magnetic ring iron core 0052.

The magnetic adjusting ring 001 comprises a framework 0011 and a magnetic conduction block 200 embedded in the framework 0011. The inner magnetic ring 004, the magnetic adjusting ring 001 and the outer magnetic ring 005 are coaxially sleeved from inside to outside and are spaced from each other. And the magnetic conduction block 200 is opposite to the inner magnetic ring permanent magnet 0041 and the outer magnetic ring permanent magnet 0051 in the radial direction of the inner magnetic ring 004. That is to say, the magnetic adjusting ring 001 is sleeved on the inner magnetic ring 004 and forms an air gap with the inner magnetic ring 004, and the outer magnetic ring 005 is sleeved on the magnetic adjusting ring 001 and forms an air gap with the magnetic adjusting ring 001.

According to the permanent magnet gear speed change device 003 of the embodiment of the invention, a magnetic field is formed between the inner magnetic ring 004 and the outer magnetic ring 005, the magnet adjusting ring 001 is arranged between the outer magnetic ring 005 and the inner magnetic ring 004, and the magnet adjusting ring 001 can cut magnetic lines of force between the outer magnetic ring 005 and the inner magnetic ring 004 to play a role in adjusting the magnetism, so that the speed and power transformation ratio function is realized.

The input shaft 0061, the output shaft 0062 and the inner magnetic ring 004 are coaxial, that is, the central axes of the input shaft 0061, the output shaft 0062, the inner magnetic ring 004, the outer magnetic ring 005 and the magnetic adjusting ring 001 are all coincident with each other.

First accent magnetic ring flange 0091 and second accent magnetic ring flange 0092 all with transfer the magnetic ring 001 and link to each other and be located inner magnetic ring 004's both sides respectively in inner magnetic ring 004's axial, first accent magnetic ring flange 0091 cover is established on output shaft 0062 and is linked to each other so that transfer magnetic ring 001 and output shaft 0062 transmission to be connected, that is to say, transfer magnetic ring 001 to realize the transmission through first accent magnetic ring flange 0091 and output shaft 0062 and be connected. In addition, the first magnetic adjusting ring flange 0091 plays a supporting role in the magnetic adjusting ring 001.

An outer supporting bearing 0071 is sleeved on the input shaft 0061, and a second magnetic ring adjusting flange 0092 is sleeved on the outer supporting bearing 0071, so that the input shaft 0061 can rotate relative to the second magnetic ring adjusting flange 0092. That is to say, through the outer support bearing 0071 that the cover was established on input shaft 0061, can rotate relatively between second magnet adjusting ring flange 0092 and the input shaft 0061, and second magnet adjusting ring flange 0092 supports on outer support bearing 0071, because outer support bearing 0071 cover is established on input shaft 0061 again, consequently second magnet adjusting ring flange 0092 can realize the support of input shaft 0061 to magnet adjusting ring 001 under the circumstances that does not influence input shaft 0061 and magnet adjusting ring 001 and rotate.

It can be understood that, because the first magnetic adjustment ring flange 0091 and the second magnetic adjustment ring flange 0092 are respectively located at two sides of the inner magnetic ring 004 in the axial direction of the inner magnetic ring 004, that is, the first magnetic adjustment ring flange 0091 and the second magnetic adjustment ring flange 0092 have a certain interval in the axial direction of the inner magnetic ring 004, the magnetic adjustment ring 001 has two spaced supporting points in the axial direction of the inner magnetic ring 004, so that the stability of the magnetic adjustment ring 001 can be ensured, and the magnetic adjustment ring 001 is prevented from jumping in the operation process.

The inner support bearing 0072 is matched between the input shaft 0061 and the output shaft 0062 in the radial direction of the inner magnetic ring 004, namely, the input shaft 0061 and the input shaft 0061 can rotate mutually through the inner support bearing 0072, and the coaxiality of the input shaft 0061 and the output shaft 0062 can be guaranteed.

The permanent magnet gear change mechanism 003 provided by the present invention is further described below in several embodiments.

The first embodiment is as follows:

as shown in fig. 1, in the present embodiment, the magnetic adjustment ring 001 includes a ring body 100 and a magnetic conduction block 200a, and the ring body 100 is used as a skeleton 0011 of the magnetic adjustment ring 001. The ring body 100 is non-magnetically conductive.

As shown in fig. 2, a plurality of mounting grooves 110 are formed in the ring body 100 and are spaced apart from each other in the circumferential direction of the ring body 100, and preferably, the length direction of the mounting grooves 110 is along the axial direction of the ring body 100. The plurality of magnetic conduction blocks 200a are embedded in the installation grooves 110 on the ring body 100 in a one-to-one correspondence. The cross-sectional profile of each magnetic conductive block 200a is matched with the cross-sectional profile of the corresponding mounting groove 110, and two side surfaces of each magnetic conductive block 200a are in contact with the wall surface of the corresponding mounting groove 110.

As shown in fig. 3 and 4, the magnetic block 200a according to the embodiment of the present invention has a first dovetail portion 210, an intermediate portion 220, and a second dovetail portion 230, the intermediate portion 220 being connected to each of the first dovetail portion 210 and the second dovetail portion 230.

The size of the first dovetail portion 210 gradually increases from inside to outside and forms surface contact with the wall surface of the mounting groove 110, that is, two limit contact surfaces are formed between two sides of the first dovetail portion 210 and the wall surface of the mounting groove 110, so as to limit the magnetic conduction block 200a from being pulled out of the mounting groove 110 inwards under the action of the magnetic field. The size of the second dovetail 230 gradually increases from outside to inside and two limit contact surfaces are formed between the two sides of the second dovetail and the wall surface of the mounting groove 110 to limit the magnetic conduction block 200a from being pulled out of the mounting groove 110 outwards under the action of a magnetic field or centrifugal force. Therefore, a stable limit relationship is formed between the magnetic conduction block 200a and the ring body 100 in the embodiment of the invention, so that the magnetic adjustment ring 001 in the embodiment of the invention has good structural integrity, stability, structural strength and rigidity.

As shown in fig. 2 and 4, a contact surface of the first dovetail portion 210 with the wall surface of the mounting groove 110 is a flat surface, and a contact surface of the second dovetail portion 230 with the wall surface of the mounting groove 110 is also a flat surface. That is, both side surfaces of the first dovetail portion 210 are processed into planes, and since the shape of the magnetic conductive block 200a is matched with the shape of the mounting groove 110, the portion of the mounting groove 110 contacting with the first dovetail portion 210 is also processed into a plane. The second dovetail 230 works the same.

Alternatively, the contact surface of the first dovetail portion 210 and the wall surface of the mounting groove 110 may be an arc surface, and the contact surface of the second dovetail portion 230 and the wall surface of the mounting groove 110 may also be an arc surface. That is, both side surfaces of the first dovetail portion 210 are processed into arc surfaces, and since the shape of the magnetic conductive block 200a is matched with the shape of the mounting groove 110, the portion of the mounting groove 110 contacting with the first dovetail portion 210 is also processed into arc surfaces. The second dovetail 230 works the same.

Preferably, the curved side of the first dovetail portion 210 may be recessed inwardly with respect to the first dovetail portion 210, which may be more reasonable than protruding outwardly with respect to the first dovetail portion 210.

It can be appreciated that the planar machining process is simpler than the arc surface, and thus it is preferable that the contact surface of each of the first and

second dovetail parts

210 and 230 with the wall surface of the mounting groove 110 is a plane surface.

In the present embodiment, the maximum dimension of each of the first and second dovetails 210, 230 is greater than the maximum dimension of the intermediate portion 220. As shown in fig. 4, both side surfaces of the middle portion 220 opposite in the axial direction of the ring body 100 are flat. The outer end of the middle portion 220 has a size slightly larger than the inner end of the middle portion 220, that is, the cross-section of the middle portion 220 has an inverted trapezoidal profile with gradually increasing sizes from the inside to the outside. The maximum dimension of the intermediate portion 220 is at its outer end, the maximum dimension of the first dovetail portion 210 is at its outer end, and the maximum dimension of the second dovetail portion 230 is at its inner end, as can be seen in FIG. 1, the maximum dimension of each of the first dovetail portion 210 and the second dovetail portion 230 is greater than the maximum dimension of the intermediate portion 220. In addition, the side surfaces of the middle part 220 are all planes, so that the processing technology of the magnetic conduction block 200a is simpler, and the structure of the magnetic conduction block 200a is more reasonable.

The minimum dimension of the first dovetail portion 210 is the smallest dimension of its inner end, i.e., the location of the first dovetail portion 210 where it joins the intermediate portion 220. The minimum dimension of the second dovetail portion 230 is the smallest dimension at its outer end, i.e., the location of the second dovetail portion 230 that is connected to the intermediate portion 220. The minimum dimension of the first dovetail portion 210 is greater than the minimum dimension of the second dovetail portion 230.

It will be understood that the invention is not limited thereto. For example, the size of the middle portion 220 may remain constant from the inside outward, with the smallest dimension of the first dovetail 210 being equal to the smallest dimension of the second dovetail 230. Further, in other embodiments, the middle portion 220 may be designed to have a narrow middle and a wide end, i.e., each of the inner and outer ends of the middle portion 220 has a size larger than that of at least a portion of the middle portion 220, and it is understood that the structure of the middle portion 220 satisfying the above conditions is various and is not listed here.

As shown in fig. 5, the ring body 100 includes a first end ring 130a, a second end ring 140a, and a plurality of spacers 150, the plurality of spacers 150 being located between the first end ring 130a and the second end ring 140a in the axial direction of the ring body 100. A plurality of spacers 150 are spaced circumferentially along the ring body 100.

The ring body 100 is further provided with a plurality of groove sections 120 which are connected with the mounting grooves 110 in a one-to-one correspondence manner in the axial direction of the ring body 100, and the mounting grooves 110 and the groove sections 120 are formed between adjacent division bars 150. The magnetic conductive blocks 200a can enter the groove sections 120 along the radial direction of the ring body 100 and enter the installation grooves 110 along the axial direction of the ring body 100. As shown in fig. 1 and 7, the magnetic flux adjusting ring 001 further includes a plurality of non-magnetic conductive fixing blocks 300, and the plurality of fixing blocks 300 are installed in the groove sections 120 in a one-to-one correspondence so as to limit the magnetic conductive blocks 200a in the axial direction of the ring body 100. The fixing block 300 has a shape and a size matched with those of the groove section 120.

In the structural schematic diagrams of the magnetic regulating ring 001 shown in fig. 1 and 5, the groove section 120 is closer to the first end ring 130a than the mounting groove 110. In another structural schematic diagram of the magnetic tuning ring 001 shown in fig. 9, the groove section 120 is closer to the second end ring 140a than the mounting groove 110.

As shown in fig. 1 and 8, the magnetism regulating ring 001 further includes a collar 400, and the collar 400 is disposed on the outer circumferential surface of the ring body 100 and/or the inner circumferential surface of the ring body 100 to prevent the fixing block 300 from being removed from the groove section 120.

Optionally, the size of the groove section 120 in the circumferential direction of the ring body 100 is gradually reduced from outside to inside along the radial direction of the ring body 100, and the collar 400 is sleeved on the outer circumferential surface of the ring body 100 and abuts against the outer side surface of the fixing block 300. Alternatively, the size of the groove section 120 in the circumferential direction of the ring body 100 is gradually increased from the outside to the inside in the radial direction of the ring body 100, and the collar 400 is provided on the inner circumferential surface of the ring body 100 and abuts against the inner side surface of the fixing block 300. Alternatively, the size of the groove section 120 in the circumferential direction of the ring body 100 is constant from the outside to the inside in the radial direction of the ring body 100, and the collar 400 is provided on both the outer circumferential surface of the ring body 100 and the inner circumferential surface of the ring body 100.

In other embodiments, the ring body 100 may not have the groove section 120, one end of the division bar 150 is integrally formed with the second end ring 140a, the other end of the division bar 150 is detachably connected to the first end ring 130a, and the installation groove 110 is formed between the adjacent division bars 150. That is, when the first end ring 130a is detached, one end of the installation groove 110 away from the second end ring 140a is opened, the magnetic conductive block 200a can be installed in the installation groove 110 along the axial direction of the magnetic flux adjusting ring 001, and then the first end ring 130a is connected to the other end of the division bar 150, so that the magnetic conductive block 200a is stably inserted into the installation groove 110 of the ring body 100.

In this embodiment, the ring body 100 is a titanium alloy ring body 100. In other words, the ring body 100 is made of a titanium alloy. It will be appreciated that the invention is not so limited. By adopting the titanium alloy with high strength to make the ring body 100, the integral rigidity and strength of the magnet adjusting ring 001 can be further ensured, so that the magnet adjusting ring 001 can be used for bearing and power transmission of the permanent magnet gear speed change device 003. Under the same power parameter of the speed changer, the magnetic regulating ring 001 is used as a power transmission port, and the maximum transmission ratio and the maximum thrust can be obtained.

Optionally, the ring body 100 is a non-magnetic metal ring body 100, a non-magnetic alloy ring body 100, a glass fiber reinforced plastic ring body 100, a glass fiber ring body 100, a ceramic ring body 100, a carbon fiber ring body 100, or a resin material ring body 100. In other words, the material of the ring body 100 may be a non-magnetic metal, a non-magnetic alloy, glass fiber reinforced plastic, glass fiber, ceramic, carbon fiber, or resin material, etc. In addition, the material of the ring body 100 may also be a non-magnetic and non-conductive material, such as glass fiber reinforced plastic, glass fiber, carbon fiber, or resin material.

Further, as shown in fig. 6, the magnetic conductive block 200a in the present embodiment is formed by stacking a plurality of soft magnetic material sheets 240, and adjacent soft magnetic material sheets 240 are bonded and isolated from each other by a non-conductive adhesive layer 250. In other words, the magnetic conductive block 200a includes a plurality of soft magnetic material sheets 240 and a plurality of non-conductive adhesive layers 250, and the soft magnetic material sheets 240 and the non-conductive adhesive layers 250 are alternately arranged one on another and stacked together, that is, in the manufacturing process of the magnetic conductive block 200a, the soft magnetic material sheets 240 and the non-conductive adhesive layers are stacked together according to the arrangement of the soft magnetic material sheets 240, the non-conductive adhesive layers, the soft magnetic material sheets 240 and the non-conductive adhesive layers … … to form the magnetic conductive block 200 a. Wherein the soft magnetic material sheet 240 is an amorphous soft magnetic alloy sheet. In other words, in this embodiment, the soft magnetic material is an amorphous soft magnetic alloy. It will be appreciated that the invention is not so limited.

According to the magnet adjusting ring 001 provided by the embodiment of the invention, the magnetic conduction block 200a is made of the soft magnetic material and the non-conductive adhesive, so that the magnetic conduction performance of the magnetic conduction block 200a can be improved, the existing iron core material is replaced by the high-performance magnetic conduction material, the loss can be reduced, and the performance and the transmission efficiency can be improved. Therefore, the magnet adjusting ring 001 is arranged to be an embedded structure of the magnetic conduction block 200a made of high-performance magnetic conduction materials, so that the eddy current loss of the magnet adjusting ring 001 can be reduced, the temperature in the box body of the speed changer is reduced, and the efficiency of the permanent magnet speed changer is improved. In addition, the two adjacent soft magnetic material sheets 240 can be separated while the two adjacent soft magnetic material sheets 240 are bonded together through the non-conductive adhesive layer 250, so that a magnetic field is formed in each soft magnetic material sheet 240, iron losses such as eddy current loss and hysteresis loss are reduced, heat generation is reduced, and the magnetic regulation performance is improved.

Alternatively, the soft magnetic material sheet 240 is an iron sheet, a low-carbon steel sheet, an iron-silicon alloy sheet, an iron-aluminum alloy sheet, an iron-silicon-aluminum alloy sheet, a nickel-iron alloy sheet, an iron-cobalt alloy sheet, a soft magnetite sheet, an amorphous soft magnetic alloy sheet, or an ultra-microcrystalline soft magnetic alloy sheet. In other words, the soft magnetic material may be iron, low carbon steel, an iron-silicon based alloy, an iron-aluminum based alloy, an iron-silicon-aluminum based alloy, a nickel-iron based alloy, an iron-cobalt based alloy, a soft ferrite, an amorphous soft magnetic alloy, an ultra-microcrystalline soft magnetic alloy, or the like. It will be appreciated that the invention is not so limited.

Further, the thickness of the amorphous soft magnetic alloy sheet was 0.025 mm. In other words, each amorphous soft magnetic alloy piece has a length of 0.025mm in the axial direction of the ring body 100.

Example two:

in the present embodiment, the magnetic flux adjusting ring in the permanent magnet gear shifting device 003 is the cast magnetic flux adjusting ring 002. The cast magnetism adjusting ring 002 includes a frame 0011 and a magnetism guiding block 200b, and the frame 0011 includes a first end ring 130b, a second end ring 140b, and a plurality of reinforcing columns 510 connected to each of the first end ring 130b and the second end ring 140 b. The magnetic conductive blocks 200b are located between the first end ring 130b and the second end ring 140b, and a casting body 520 formed by casting is arranged between the adjacent magnetic conductive blocks 200 b.

The cast shim ring 002 of the present embodiment is described below with respect to fig. 10-17. As shown in fig. 10, the cast type magnetic adjustment ring 002 of the embodiment of the present invention includes a skeleton 0011 and a plurality of magnetic conductive blocks 200 b.

The skeleton 0011 includes a first end ring 130b and a second end ring 140b opposite in an axial direction of the cast dimming ring 002. The skeleton 0011 further includes a plurality of reinforcement columns 510, the reinforcement columns 510 are arranged at intervals along the circumferential direction of the poured magnetism adjusting ring 002, a first end of each reinforcement column 510 is connected to the first end ring 130b, and a second end of each reinforcement column 510 is connected to the second end ring 140 b.

The magnetic conduction blocks 200b are arranged at intervals along the circumferential direction of the cast magnetic adjustment ring 002 and are located between the first end ring 130b and the second end ring 140b in the axial direction of the cast magnetic adjustment ring 002, a casting gap is formed between every two adjacent magnetic conduction blocks 200b, and a non-magnetic conduction casting body 520 is filled in the casting gap so that the casting body 520 can be cast on the framework 0011 and the magnetic conduction blocks 200 b.

That is to say, the plurality of magnetic conductive blocks 200b are clamped between the first end ring 130b and the second end ring 140b in the axial direction of the cast magnetic tuning ring 002, the magnetic conductive blocks 200b, the reinforcing column 510, the first end ring 130b and the second end ring 140b form a cage constituting the cast magnetic tuning ring 002, and the magnetic conductive blocks 200b and the reinforcing column 510 serve as axial force carriers of the cage. In the circumferential direction of the pouring type magnetic adjusting ring 002, a gap for pouring the non-magnetic-conductive pouring body 520 is formed between two adjacent magnetic conductive blocks 200b, that is, a pouring gap. That is, in the circumferential direction of the pouring type magnetism adjusting ring 002, the magnetic conduction blocks 200b and the pouring bodies 520 are alternately arranged. The casting gap is defined by the magnetic conductive block 200b and the framework 0011, and the casting body 520 is formed by casting a casting material in the casting gap. The arrangement of the reinforcing column 510 improves the structural strength and rigidity of the cast magnet adjusting ring 002.

According to the embodiment, the cast magnet adjusting ring comprises a cage body formed by magnetic conduction blocks, reinforcing columns, first end rings and second end rings, and the casting body is filled in casting gaps formed between the adjacent magnetic conduction blocks, so that the magnet adjusting ring structure with higher overall strength and rigidity is formed. Through tests, when the pouring type magnetic regulating ring is used as a rotor in a permanent magnet gear speed changing device, the pouring type magnetic regulating ring can bear the torque strength of 500MPa, the torque output of 15000NM is met, and the integral deformation of the pouring type magnetic regulating ring is less than 0.5 mm. Therefore, the pouring type magnetic adjusting ring of the embodiment of the invention solves the problems of large torque output of the hundred kilowatt-level permanent magnet gear speed change device, breaks through the technical route of research and development of the high-power large-torque permanent magnet gear speed change device, and expands the application range of the permanent magnet gear speed change device.

Moreover, it can be understood that, in the related art, the frame of the magnetic adjusting ring is usually integrally formed, and an installation groove for installing the magnetic conductive block is formed on the integrated frame, so that the internal reinforcement processing cannot be performed any more, and only the reinforcement ring can be arranged on the outer side or the inner side to enhance the structural strength and rigidity, but the processing mode is complicated, and there are many parts and high cost. The pouring type magnetic adjusting ring in the embodiment is characterized in that the framework and the magnetic conduction blocks are firstly assembled into a cage body type structure, the cage body type structure comprises reinforcing columns which can play a role in reinforcing, gaps between the magnetic conduction blocks are filled into the integral magnetic adjusting ring through pouring, and the processing mode is reasonable and simple.

Therefore, the pouring type magnetic adjusting ring provided by the embodiment has the advantages of high strength and rigidity, high bearing capacity and simple and reasonable processing mode.

It should be noted that the first end ring 130b may be a flange, and the second end ring 140b may also be a flange, so that the cast flux adjusting ring 002 is in transmission connection with the transmission shaft. As shown in fig. 10 and 13, the first end ring 130b is a flange structure, and has a low-speed shaft mounting hole 132, and the low-speed shaft is connected to the first end ring 130b through the low-speed shaft mounting hole 132 so that the cast-in flux adjusting ring 002 is in transmission connection with the low-speed shaft. Alternatively, the first end ring 130b and the second end ring 140b may both be connected to a flange for driving connection of the cast flux adjusting ring 002 to the transmission shaft.

As shown in fig. 13 and 14, the first end ring 130b is provided with a plurality of first threaded holes 131, the second end ring 140b is provided with a plurality of second threaded holes 141, the first and second ends of the reinforcement posts 510 are provided with external threads, the first ends of the reinforcement posts 510 are fitted in the first threaded holes 131 in a one-to-one correspondence, and the second ends of the reinforcement posts 510 are fitted in the second threaded holes 141 in a one-to-one correspondence. The reinforcement posts 510 are positioned and interconnected with the first end ring 130b and the second end ring 140b by a threaded fit.

Further, at least a part of the reinforcing columns 510 form a plurality of reinforcing column groups, and the plurality of reinforcing column groups correspond to the plurality of magnetic conduction blocks 200b one to one and are sequentially arranged at intervals along the circumferential direction of the pouring type magnetic adjustment ring 002. Each reinforcing column group comprises a first reinforcing column 511 and a second reinforcing column 512, and each magnetic conduction block 200b is clamped between the first reinforcing column 511 and the second reinforcing column 512 of the corresponding reinforcing column group. It is understood that the first stiffening columns 511 may comprise one or more, and the second stiffening columns 512 may also comprise one or more. Optionally, the first end of the magnetic conductive block 200b abuts against the first end ring 130b, the second end of the magnetic conductive block 200b abuts against the second end ring 140b, and the magnetic conductive block 200b is limited by the first end ring 130b and the second end ring 140b in the axial direction of the pouring type magnetism adjusting ring 002.

In other embodiments, the first end of the magnetic block 200b may be connected to the first end ring 130b and the second end of the magnetic block 200b may be connected to the second end ring 140 b. As an example, a plurality of first limiting grooves arranged at intervals along the circumferential direction of the poured flux regulating ring 002 are formed on the end surface of the first end ring 130b close to the second end ring 140b, a plurality of second limiting grooves arranged at intervals along the circumferential direction of the poured flux regulating ring 002 are formed on the end surface of the second end ring 140b close to the first end ring 130b, the plurality of first limiting grooves and the plurality of second limiting grooves correspond to each other in the axial direction of the poured flux regulating ring 002 one by one, the first end of each magnetic conductive block 200b extends into the first limiting groove, and the second end extends into the second limiting groove corresponding to the first limiting groove. Thereby, the magnetic conduction block 200b and the first end ring 130b and the second end ring 140b are formed between the magnetic conduction block and the pouring type magnetic adjustment ring 002 to limit in the axial direction, the circumferential direction and the radial direction.

As shown in fig. 11, in the present embodiment, all the reinforcing columns 510 constitute a plurality of reinforcing column groups, and one first reinforcing column 511 and one second reinforcing column 512 constitute one reinforcing column group. In other embodiments, only a part of the reinforcing columns 510 may form a plurality of reinforcing column groups, another part of the reinforcing columns 510 is a third reinforcing column 510, and the third reinforcing columns 510 are uniformly arranged along the circumferential direction of the cast flux regulating ring 002 to further reinforce the strength and rigidity of the cast flux regulating ring 002.

Further, as shown in fig. 11, the first reinforcing columns 511 and the second reinforcing columns 512 in each pair of reinforcing column groups are arranged at intervals along the circumferential direction of the cast magnet adjusting ring 002. In other words, the first reinforcing columns 511 and the second reinforcing columns 512 are alternately arranged in the circumferential direction of the poured magnetism regulating ring 002. Each magnetic conduction block 200b is located between the first reinforcing column 511 and the second reinforcing column 512 of the corresponding reinforcing column group in the circumferential direction of the cast magnetic adjustment ring 002.

As shown in fig. 11, 15 and 16, in order to better limit the magnetic conducting block 200b, the magnetic conducting block 200b has a first side surface 201 and a second side surface 202 opposite to each other in the circumferential direction of the cast magnetic tuning ring 002. The first side 201 has a first detent 2011, at least a portion of the first reinforcing column 511 fits within the first detent 2011, the second side 202 has a second detent 2021, and at least a portion of the second reinforcing column 512 fits within the second detent 2021. Therefore, under the action of the first reinforcing column 511 and the second reinforcing column 512, the magnetic conducting block 200b is limited in the circumferential direction and the radial direction of the pouring type magnetic adjusting ring 002. The magnetic conduction block 200b and the skeleton 0011 form a stable cage structure, and the overall structural stability of the pouring type magnet adjusting ring 002 is improved.

It is understood that the present invention is not limited thereto, for example, in other embodiments, the first reinforcing column 511 and the second reinforcing column 512 of each pair of reinforcing column groups are arranged inside and outside, and each magnetic conductive block 200b is located between the first reinforcing column 511 and the second reinforcing column 512 of the corresponding reinforcing column group in the radial direction of the poured magnetic adjusting ring 002. The outer side surface of the magnetic conduction block 200b is provided with a first positioning groove 2011, at least one part of the first reinforcing column 511 is matched in the first positioning groove 2011, the inner side surface of the magnetic conduction block 200b is provided with a second positioning groove 2021, and at least one part of the second reinforcing column 512 is matched in the second positioning groove 2021.

Preferably, as shown in fig. 11, the magnetic conduction blocks 200b are distributed at equal intervals in the circumferential direction of the cast magnetic adjustment ring 002, so that the structure of the cast magnetic adjustment ring 002 is more reasonable.

Preferably, the length direction of the magnetic conduction block 200b and the length direction of the reinforcing column 510 both extend along the axial direction of the cast magnetic adjustment ring 002, so that the structure of the cast magnetic adjustment ring 002 is more reasonable.

The contact position of the reinforcing column 510 and the magnetic block 200b, the position between the reinforcing column 510 and the first end ring 130b, and the position between the reinforcing column 510 and the second end ring 140b are insulated so that the reinforcing column 510 and each of the magnetic block 200b, the first end ring 130b, and the second end ring 140b are insulated from each other. Optionally, the reinforcing posts 510 are made of a non-magnetically conductive metal material.

Further, as shown in fig. 14, the second end ring 140b is provided with casting holes 540, and the casting holes 540 are communicated with each casting gap, so that casting material is injected into the casting gaps to form the casting body 520. In other embodiments, the pour holes 540 may also be provided on the first end ring 130b, or the pour holes 540 may be provided on each of the first end ring 130b and the second end ring 140 b.

As shown in fig. 10, the skeleton 0011 of the cast magnetic tuning ring 002 in this embodiment includes a reinforcing spacer 530. The reinforcing spacer 530 is located between the first end ring 130b and the second end ring 140b in the axial direction of the cast magnetic tuning ring 002. In order not to affect the installation of the reinforcing columns 510, as shown in fig. 17, the reinforcing spacer 530 is provided with a plurality of positioning holes 532 corresponding to the reinforcing columns 510. The positioning holes 532 are through holes, and each of the reinforcement columns 510 passes through the corresponding positioning hole 532. It is understood that in other embodiments, the skeleton 0011 of the cast magnetic tuning ring 002 may include a plurality of reinforcing spacers 530 spaced along the axial direction of the cast magnetic tuning ring 002.

As shown in fig. 10, each magnetic conductive block 200b includes two sub magnetic conductive blocks arranged along the axial direction of the casting type magnetic adjustment ring 002, the two sub magnetic conductive blocks of each magnetic conductive block 200b and the reinforcing spacer ring 530 are alternately arranged in the axial direction of the casting type magnetic adjustment ring 002, that is, the reinforcing spacer ring 530 is located between two adjacent sub magnetic conductive blocks in the axial direction of the casting type magnetic adjustment ring 002, and each sub magnetic conductive block abuts against the reinforcing spacer ring 530. Specifically, each magnetic conductive block 200b includes a first sub magnetic conductive block and a second sub magnetic conductive block, and in the axial direction of the cast magnetic tuning ring 002, the first sub magnetic conductive block, the reinforcing spacer ring 530 and the second sub magnetic conductive block are sequentially arranged, and the first sub magnetic conductive block and the second sub magnetic conductive block are both abutted against the reinforcing spacer ring 530.

It can be understood that, when the reinforcing spacer ring 530 includes a plurality of sub-magnetic conductive blocks, each magnetic conductive block 200b includes more than two sub-magnetic conductive blocks arranged along the axial direction of the cast flux adjusting ring 002, the plurality of sub-magnetic conductive blocks of each magnetic conductive block 200b and at least one reinforcing spacer ring 530 are alternately arranged in the axial direction, each reinforcing spacer ring 530 is located between two adjacent sub-magnetic conductive blocks in the axial direction, and each sub-magnetic conductive block abuts against the adjacent reinforcing spacer ring 530.

Further, the size of the reinforcing spacer ring 530 in the radial direction of the cast magnetic ring 002 is smaller than that of the magnetic ring in the radial direction of the cast magnetic ring 002, so that an annular cast runner communicated with each cast gap is formed. That is to say, because the radial dimension of the casting type magnetic ring 002 of the reinforcing spacer ring 530 is smaller than the radial dimension of the magnetic ring of the casting type magnetic ring 002, the inner side and/or the outer side of the reinforcing spacer ring 530 can form an annular casting runner, and the annular casting runner can be communicated with each casting gap, so that the casting material can enter the annular casting runner through the casting gap, and the casting material in the annular casting runner can also enter the casting gap, so that the casting material can be better filled in each casting gap.

Specifically, in this embodiment, after the magnetic conductive block 200b and the frame 0011 are installed, the un-poured cage structure is placed in a pouring mold, the pouring inner mold abuts against the inner end surface of the magnetic conductive block 200b, and the pouring outer mold abuts against the outer end surface of the magnetic conductive block 200 b. The casting mold and the casting gap define a linear casting flow channel, the casting mold and the reinforcing spacer ring 530 form an annular casting flow channel, the linear casting flow channel and the annular casting flow channel are communicated with each other to form a casting flow channel, and casting materials are injected into the casting flow channel through the casting holes 540 on the second end ring 140 b.

The pouring material enters the pouring gap through the pouring hole, flows into the annular pouring runner along the pouring gap, flows through the annular pouring runner, then enters the pouring gap again, and flows in the direction close to the first end ring 130b until the pouring material completely fills the pouring gap and the annular pouring runner.

In addition, due to the existence of the annular casting runner, as shown in fig. 14, the number of casting holes 540 on the second end ring 140b can be less than the number of casting gaps, so that the processing amount of the casting holes 540 is reduced, and the structural strength of the second end ring 140b is improved.

Further, in order to make the casting material flow better, the reinforcing spacer 530 may be provided with a casting hole 540, and optionally, as shown in fig. 17, the casting hole 540 is located inside the positioning hole 532.

It should be noted that, in other embodiments of the present invention, the casting type flux modulating ring 002 may not include the reinforcing spacer 530, and the effect of improving the strength and rigidity of the flux modulating ring structure can also be achieved, for example, in these embodiments, the second end ring 140b is provided with a plurality of casting holes 540, the number of the casting holes 540 is the same as the number of the casting gaps and corresponds to one another, the casting holes 540 are communicated with the corresponding casting gaps, so that the casting material is injected into the casting gaps through the casting holes 540, and the casting material forms the casting body 520 after being cured.

Example three:

the permanent magnet gear shifting device 003 of the present embodiment is described below with reference to fig. 18. The permanent magnet gear speed change device 003 comprises an inner magnet ring 004, an outer magnet ring 005, a magnetic adjusting ring 001, an input shaft 0061, an output shaft 0062, an outer support bearing 0071, an inner support bearing 0072, an inner magnet ring flange 0081 and a magnetic adjusting ring flange 0082. The inner magnetic ring 004 is in transmission connection with an input shaft 0061, and the magnetic adjusting ring 001 is in transmission connection with an output shaft 0062. The input shaft 0061, the output shaft 0062 and the inner magnetic ring 004 are coaxial.

In this embodiment, the outer magnetic ring 005 is a stator, the inner magnetic ring 004 is a high-speed rotor, and the magnetic adjusting ring 001 is a low-speed rotor, wherein the inner magnetic ring 004 and the magnetic adjusting ring 001 rotate in the same direction, so as to realize the ratio changing function of speed and power. Therefore, the magnetic adjusting ring 001 is used as a power transmission port, so that higher transmission ratio and thrust can be obtained, and the transmission efficiency of the permanent magnet gear speed changing device 003 is improved.

It can be understood that, when the permanent magnet gear speed change device 003 according to the embodiment of the present invention is used, the motor drives the input shaft 0061 to rotate and drives the inner magnetic ring 004 to rotate, and then the rotation of the inner magnetic ring 004 causes the magnetic modulating ring 001 to cut magnetic lines between the outer magnetic ring 005 and the inner magnetic ring 004, so as to generate a rotating magnetic field to drive the magnetic modulating ring 001 to rotate and the rotation is output through the output shaft 0062, so that the kinetic energy output by the motor is transmitted to the output shaft 0062 through the input shaft 0061, thereby forming a contactless magnetic gear transmission.

An outer support bearing 0071 is sleeved on the magnetic adjustment ring skeleton 0011, and the outer support bearing 0071 is located between the outer magnetic ring cylinder 0053 and the magnetic adjustment ring skeleton 0011 in the radial direction of the inner magnetic ring 004 and is in contact with each of the outer magnetic ring cylinder 0053 and the magnetic adjustment ring skeleton 0011. One end of an output shaft 0062 extends into the inner magnetic ring cylinder 0043, the inner support bearing 0072 is sleeved on the end of the output shaft 0062, and the inner support bearing 0072 is located between the inner magnetic ring cylinder 0043 and the output shaft 0062 in the radial direction of the inner magnetic ring 004 and is in contact with each of the inner magnetic ring cylinder 0043 and the output shaft 0062.

The permanent magnet gear speed change device provided by the embodiment of the invention comprises an outer support bearing and an inner support bearing, wherein the outer support bearing plays a role in supporting a magnetic adjusting ring framework through the combined action of the inner support bearing and the outer support bearing, the inner support bearing plays a role in supporting an output shaft, and the magnetic adjusting ring realizes stable rotation under the combined action of the outer support bearing and the inner support bearing due to the common rotation of the magnetic adjusting ring and the output shaft.

Therefore, the permanent magnet gear speed change device provided by the embodiment of the invention has the advantage of good structural stability.

As shown in fig. 18, the inner magnet ring core 0042, the inner magnet ring permanent magnet 0041, and the inner magnet ring cylinder 0043 are equal to each other in length in the axial direction of the inner magnet ring 004. The inner magnetic ring flange 0081 is sleeved on the input shaft 0061 and is connected with the inner magnetic ring 004 so that the inner magnetic ring 004 is in transmission connection with the input shaft 0061. In other words, the inner magnetic ring 004 is in transmission connection with the input shaft 0061 through the inner magnetic ring flange 0081. Specifically, the inner magnetic ring flange 0081 is connected to the inner magnetic ring barrel 0043. As shown in fig. 18, the input shaft 0061 is connected to the inner magnetic ring flange 0081 from left to right. The input shaft 0061 and the output shaft 0062 are opposite in the axial direction of the inner magnetic ring 004, and one end of the output shaft 0062 extends into the inner magnetic ring cylinder body 0043 from right to left.

The magnetic adjusting ring flange 0082 is sleeved on the output shaft 0062 and is connected with the magnetic adjusting ring framework 0011 so that the magnetic adjusting ring 001 is in transmission connection with the output shaft 0062. In other words, the magnetic adjusting ring framework 0011 is connected with the magnetic adjusting ring flange 0082 to realize the transmission connection between the magnetic adjusting ring 001 and the output shaft 0062. The magnetic conduction block 200 embedded on the magnetic regulation ring skeleton 0011 is opposite to the inner magnetic ring permanent magnet 0041 and the outer magnetic ring permanent magnet 0051 in the radial direction of the inner magnetic ring 004.

As shown in fig. 18, the magnetic adjusting ring flange 0082 is connected to the side of the magnetic adjusting ring skeleton 0011 close to the output shaft 0062. The length of the outer magnetic ring iron core 0052 and the outer magnetic ring permanent magnet 0051 in the axial direction of the inner magnetic ring 004 is smaller than the length of the outer magnetic ring cylinder 0053 in the axial direction of the inner magnetic ring 004. The outer magnetic ring iron core 0052 and the outer magnetic ring permanent magnet 0051 are equal in length and flush with each other, and an outer support bearing 0071 is located on one side of the outer magnetic ring permanent magnet 0051, which is far away from the output shaft 0062. Alternatively, an outer support bearing 0071 is located on a side of each of the outer magnetic ring permanent magnet 0051 and the outer magnetic ring iron core 0052 away from the output shaft 0062. In the embodiment shown in fig. 18, an outer support bearing 0071 is located on the left side of the outer magnetic ring permanent magnet 0051 (outer magnetic ring core 0052).

Therefore, the magnetic adjusting ring 001 can stably rotate under the combined action of the inner support bearing 0072 and the outer support bearing 0071.

Example four:

The outer magnetic ring 005 is a stator, the inner magnetic ring 004 is in transmission connection with the input shaft 0061, the magnetic adjusting ring 001 is in transmission connection with the output shaft 0062, namely the inner magnetic ring 004 and the magnetic adjusting ring 001 are used as rotors, and the magnetic adjusting ring 001 cuts magnetic lines between the inner magnetic ring 004 and the outer magnetic ring 005. Wherein, air gaps are arranged between the inner magnetic ring 004 and the magnetic adjusting ring 001 and between the magnetic adjusting ring 001 and the outer magnetic ring 005.

As shown in fig. 19, the inner magnetic ring flange 0081 is sleeved on the input shaft 0061 and connected with the inner magnetic ring cylinder 0043 so that the inner magnetic ring 004 is in transmission connection with the input shaft 0061. In this embodiment, the inner magnetic ring flanges 0081 include two, and the two inner magnetic ring flanges 0081 are respectively connected with two sides of the inner magnetic ring cylinder 0043, so as to connect the inner magnetic ring 004 with the input shaft 0061 more firmly. Moreover, the two inner magnetic ring flanges 0081 are located between the first magnetic ring adjusting flange 0091 and the second magnetic ring adjusting flange 0092 in the axial direction of the inner magnetic ring 004. It will be appreciated that the invention is not limited thereto and that the inner magnet ring 004 may be drivingly connected to the input shaft 0061 in other ways, which are not illustrated herein.

As shown in fig. 19, in this embodiment, a groove is formed at a first end of the output shaft 0062, the first end of the input shaft 0061 extends into the groove along the axial direction of the inner magnetic ring 004, and the inner support bearing 0072 is located in the groove and sleeved on the first end of the input shaft 0061.

It will be understood that the invention is not limited thereto. For example, in other embodiments, the first end of the input shaft 0061 is provided with a groove, the first end of the output shaft 0062 extends into the groove along the axial direction of the inner magnetic ring 004, and the inner support bearing 0072 is positioned in the groove and sleeved on the first end of the output shaft 0062.

Example five:

during the performance test of the permanent magnet gear shifting device 003, researchers in the field find that the transmission efficiency of the permanent magnet gear shifting device 003 is low, and the power loss of the permanent magnet gear shifting device 003 is increased along with the increase of the rotating speed. When the rotating speed of the high-speed end (the inner magnetic ring 004 and the input shaft 0061) of the permanent magnetic gear speed changing device 003 exceeds 500r/min, the efficiency of the permanent magnetic gear speed changing device 003 is lower than 50%. Research by researchers in the field finds that an alternating magnetic field is formed in the permanent magnet gear shifting device 003 due to relative movement of the inner magnetic ring 004 and the outer magnetic ring 005, so that eddy current loss is easily formed in the alternating magnetic field by the magnetic conductive members (such as the inner magnetic ring permanent magnet 0041, the outer magnetic ring permanent magnet 0051, the inner magnetic ring iron core 0042 and the outer magnetic ring iron core 0052) in the magnetic adjusting ring 001, the inner magnetic ring 004 and the outer magnetic ring 005.

Therefore, researchers in the field think that the eddy current loss of the permanent magnet and the iron core is a main factor causing the loss of the permanent magnet gear shifting device 003, and in order to reduce the loss value of the permanent magnet gear shifting device 003 and improve the transmission efficiency, researchers in the field improve the materials and the structures of the magnetic adjusting ring 001, the inner magnetic ring permanent magnet 0041 and the outer magnetic ring permanent magnet 0051, and the magnetic adjusting ring comprises the following components: the improvement of the framework material of the magnetic adjusting ring, the improvement of the framework and the guide block structure of the magnetic adjusting ring, the improvement of the electric conductivity of the permanent magnet of the magnetic ring and the like. Through improvement, the loss value of the permanent magnet gear speed change device 003 is reduced, and the low quick-acting rate is close to 95%. However, as the rotational speed increases, the loss increases, and when the rotational speed at the high speed end reaches 1000r/min, the transmission efficiency is only 76%. This indicates that there is still a large eddy current loss inside the permanent magnet gear change unit 003, proving that there is a potentially important factor that affects the eddy current loss and transmission efficiency of the permanent magnet gear change unit 003 in addition to the magnetic tuning ring 001, the inner magnetic ring 004, and the outer magnetic ring 005.

The technicians of the application continue to carry out the research test on the permanent magnet gear speed change device 003, and find that the temperature rise at the outer support bearing 0071 in the third embodiment is the largest. Through research, it is found that relatively obvious end leakage flux of the permanent magnet exists in the permanent magnet gear speed changing device 003, and the closer to the magnetism adjusting ring 001, the stronger the magnetic field is, the more obvious the leakage flux is.

The skilled person in the application realizes that, when the permanent magnet gear speed change device 003 is in operation, the metal members around the permanent magnet are in the alternating magnetic field, and especially the magnetic field fluctuation around the outer magnetic ring 005 and the magnetic field regulation ring 001 is higher, so that the metal members around generate larger eddy current loss, and not only the transmission efficiency of the permanent magnet speed change device is reduced, but also the operational reliability of the metal members is reduced.

The magnetic leakage of the permanent magnet cannot be avoided, and the shielding can be carried out only by adopting a certain method. Accordingly, in the fifth embodiment of the present invention, a permanent magnet gear shifting device 003 for shielding the end magnetic field of the permanent magnet with a magnetic shielding ring is provided, in which eddy current loss is reduced and transmission efficiency is improved in the permanent magnet gear shifting device 003.

The permanent magnet gear shifting device 003 of the present embodiment is described below with reference to fig. 20. As shown in fig. 20, a permanent magnet gear change unit 003 of the present embodiment is similar to the permanent magnet gear change unit 003 of the third embodiment, except that the permanent magnet gear change unit 003 of the present embodiment further includes a third magnetic shielding ring 630 and a fourth magnetic shielding ring 640.

The outer magnetic ring permanent magnet 0051 is located between the third magnetic shield ring 630 and the fourth magnetic shield ring 640 in the axial direction of the inner magnetic ring 004 to shield the end magnetic field of the outer magnetic ring permanent magnet 0051. That is to say, the third magnetic shielding ring 630 and the fourth magnetic shielding ring 640 are respectively located at two sides of the outer magnetic ring permanent magnet 0051 in the axial direction of the inner magnetic ring 004, the magnetic field at the end of the outer magnetic ring permanent magnet 0051 is shielded by the third magnetic shielding ring 630 and the fourth magnetic shielding ring 640, that is, the magnetic field leaked from the end of the outer magnetic ring permanent magnet 0051 is intercepted by the third magnetic shielding ring 630 and the fourth magnetic shielding ring 640, thereby avoiding the influence of the magnetic leakage at the end of the outer magnetic ring permanent magnet 0051 on the surrounding metal member (for example, the outer support bearing 0071), reducing the eddy current loss of the surrounding metal member, and improving the transmission efficiency of the whole machine.

According to the permanent magnet gear speed changing device provided by the embodiment, the eddy current loss generated by end magnetic leakage is proved to be an important factor influencing the transmission efficiency of the permanent magnet gear speed changing device, and the end part of the outer magnetic ring permanent magnet is shielded by adopting a magnetic shielding measure, namely, the magnetic shielding ring is adopted to shield the end magnetic leakage of the outer magnetic ring permanent magnet, so that the eddy current loss in the permanent magnet gear speed changing device is reduced, and the transmission efficiency is improved. The overall transmission efficiency of the permanent magnet gear speed change device provided by the embodiment of the invention is improved to more than 90 percent

(as shown in fig. 21).

Therefore, the permanent magnet gear speed change device provided by the embodiment has the advantages of low eddy current loss and high transmission efficiency.

It is to be understood that the present invention is not limited thereto and that the permanent magnet gear shifting device 003 may further include a first magnetic shield ring 610 and a second magnetic shield ring 620. The inner magnetic ring permanent magnet 0041 is located between the first magnetic shield ring 610 and the second magnetic shield ring 620 in the axial direction of the inner magnetic ring 004 so as to shield the end magnetic field of the inner magnetic ring permanent magnet 0041. That is to say, first magnetic shield ring 610 and second magnetic shield ring 620 are located the both sides of interior magnetic ring permanent magnet 0041 respectively in the axial of interior magnetic ring 004, the tip magnetic field of interior magnetic ring permanent magnet 0041 is shielded by first magnetic shield ring 610 and second magnetic shield ring 620, the magnetic field that interior magnetic ring permanent magnet 0041's tip was revealed is intercepted by first magnetic shield ring 610 and second magnetic shield ring 620 promptly, the tip magnetic leakage influence of interior magnetic ring permanent magnet 0041 is around the metal component (for example interior magnetic ring flange 0081), produce the eddy current loss, thereby the eddy current loss of metal component around having reduced, the transmission efficiency of permanent magnet gear speed change gear 003 is further improved.

Alternatively, the permanent magnet gear shifting device 003 may include only the first magnetic shielding ring 610 and the second magnetic shielding ring 620, and the third magnetic shielding ring 630 and the fourth magnetic shielding ring 640 are not provided, that is, only the end leakage flux of the inner magnetic ring permanent magnet 0041 is shielded.

As shown in fig. 22, the magnetic shield ring (the first magnetic shield ring 610, the second magnetic shield ring 620, the third magnetic shield ring 630 or the fourth magnetic shield ring 640) in the present embodiment is formed by stacking a plurality of silicon steel sheets 631, and adjacent silicon steel sheets 631 are adhered and separated from each other by a non-conductive adhesive layer 632. Therefore, when the permanent magnet gear speed change device 003 is in operation, the magnetic leakage at the end part of the permanent magnet is mainly concentrated in the silicon steel sheets 631 of the magnetic shielding ring, and the eddy current loss of the silicon steel sheets 631 is much smaller than that of the large conductor, so that the eddy current loss of the permanent magnet gear speed change device 003 is reduced, and the transmission efficiency is improved.

It should be noted that the present invention is not limited to this, and in other embodiments, the magnetic shield ring is formed by stacking a plurality of soft magnetic material layers, and adjacent soft magnetic material layers are bonded and separated from each other by a non-conductive adhesive layer, and may also function as a magnetic shield.

As shown in fig. 20, the outer magnetic ring permanent magnet 0051 and the outer magnetic ring iron core 0052 both have a first end face and a second end face opposite to each other in the axial direction of the inner magnetic ring 004, the first end face of the outer magnetic ring permanent magnet 0051 is flush with the first end face of the outer magnetic ring iron core 0052, the second end face of the outer magnetic ring permanent magnet 0051 is flush with the second end face of the outer magnetic ring iron core 0052, the third magnetic shielding ring 630 is in contact with both the first end face of the outer magnetic ring permanent magnet 0051 and the first end face of the outer magnetic ring iron core 0052, and the fourth magnetic shielding ring 640 is in contact with both the second end face of the outer magnetic ring permanent magnet 0051 and the second end face of the outer magnetic ring iron core 0052. Further, the outer side of each of the third magnetic shielding ring 630 and the fourth magnetic shielding ring 640 is connected to the inner side of the outer magnetic ring cylinder 0053, that is, the third magnetic shielding ring 630 and the fourth magnetic shielding ring 640 are installed on the inner side of the outer magnetic ring cylinder 0053, so that the structure of the permanent magnet gear shifting device 003 provided by the present embodiment is more reasonable.

It should be noted that, exactly because the technicians of the present application recognize that the eddy current loss generated by the end leakage flux is an important factor affecting the transmission efficiency of the permanent magnet gear speed changing device, and take corresponding measures to reduce the eddy current loss in the permanent magnet gear speed changing device and improve the transmission efficiency.

Example six:

the permanent magnet gear shifting device 003 provided in the present embodiment is a modification of the fourth and fifth embodiments, and the structure of the permanent magnet gear shifting device 003 provided in the present embodiment is similar to that of the permanent magnet gear shifting device 003 provided in the fourth embodiment, except that the permanent magnet gear shifting device 003 provided in the present embodiment further includes a first magnetic shielding ring 610, a second magnetic shielding ring 620, a third magnetic shielding ring 630, and a fourth magnetic shielding ring 640.

As shown in fig. 23, the inner magnetic ring permanent magnet 0041 and the inner magnetic ring iron core 0042 both have a first end face and a second end face opposite to each other in the axial direction of the inner magnetic ring 004, the first end face of the inner magnetic ring permanent magnet 0041 is flush with the first end face of the inner magnetic ring iron core 0042, the second end face of the inner magnetic ring permanent magnet 0041 is flush with the second end face of the inner magnetic ring iron core 0042, the first magnetic shielding ring 610 is in contact with both the first end face of the inner magnetic ring permanent magnet 0041 and the first end face of the inner magnetic ring iron core 0042, and the second magnetic shielding ring 620 is in contact with both the second end face of the inner magnetic ring permanent magnet 0041 and the second end face of the inner magnetic ring iron core 0042. That is, each of the inner magnetic ring permanent magnet 0041 and the inner magnetic ring iron core 0042 is sandwiched between the first magnetic shield ring 610 and the second magnetic shield ring 620 in the axial direction of the inner magnetic ring 004.

The outer magnetic ring permanent magnet 0051 and the outer magnetic ring iron core 0052 have opposite first and second end faces in the axial direction of the inner magnetic ring 004, the first end face of the outer magnetic ring permanent magnet 0051 is flush with the first end face of the outer magnetic ring iron core 0052, the second end face of the outer magnetic ring permanent magnet 0051 is flush with the second end face of the outer magnetic ring iron core 0052, the third magnetic shielding ring 630 is in contact with both the first end face of the outer magnetic ring permanent magnet 0051 and the first end face of the outer magnetic ring iron core 0052, and the fourth magnetic shielding ring 640 is in contact with both the second end face of the outer magnetic ring permanent magnet 0051 and the second end face of the outer magnetic ring iron core 0052. That is, each of the outer magnetic ring permanent magnet 0051 and the outer magnetic ring core 0052 is sandwiched between the third magnetic shield ring 630 and the fourth magnetic shield ring 640 in the axial direction of the inner magnetic ring 004.

According to the permanent magnet gear speed changing device provided by the embodiment, the end parts of the inner magnetic ring permanent magnet and the outer magnetic ring permanent magnet are respectively provided with a magnetic shielding measure, namely, the magnetic shielding rings are adopted to shield the end part magnetic leakage of the inner magnetic ring permanent magnet and the outer magnetic ring permanent magnet, so that the eddy current loss in the permanent magnet gear speed changing device is reduced, and the transmission efficiency is improved. Therefore, the permanent magnet gear speed change device provided by the embodiment has the advantages of low eddy current loss and high transmission efficiency.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A permanent magnet gear change device, comprising:

the magnetic ring comprises an inner magnetic ring, a magnetic adjusting ring and an outer magnetic ring, wherein the inner magnetic ring, the magnetic adjusting ring and the outer magnetic ring are coaxially sleeved from inside to outside and are spaced from each other;

the magnetic adjusting ring is in transmission connection with the output shaft, and the input shaft, the output shaft and the inner magnetic ring are coaxial;

the outer support bearing is sleeved on the input shaft;

the first magnetic adjusting ring flange and the second magnetic adjusting ring flange are connected with the magnetic adjusting ring and are respectively positioned on two sides of the inner magnetic ring in the axial direction of the inner magnetic ring, the first magnetic adjusting ring flange is sleeved on the output shaft and is connected with the output shaft so that the magnetic adjusting ring is in transmission connection with the output shaft, and the second magnetic adjusting ring flange is sleeved on the outer support bearing so that the input shaft can rotate relative to the second magnetic adjusting ring flange;

an inner support bearing fitted between the input shaft and the output shaft in a radial direction of the inner ring.

2. The permanent magnet gear shifting device according to claim 1, wherein the inner magnetic ring comprises an inner magnetic ring permanent magnet, an inner magnetic ring iron core and an inner magnetic ring cylinder which are connected in sequence from outside to inside, and the outer magnetic ring comprises an outer magnetic ring permanent magnet, an outer magnetic ring iron core and an outer magnetic ring cylinder which are connected in sequence from inside to outside.

3. The permanent magnet gear change mechanism according to claim 2, further comprising an inner magnetic ring flange, said inner magnetic ring flange being fitted over said input shaft and being connected to said inner magnetic ring cylinder for driving connection of said inner magnetic ring to said input shaft.

4. The permanent magnet gear change device of claim 1 wherein the first end of the output shaft is provided with a groove and the first end of the input shaft extends into the groove in the axial direction of the inner magnetic ring, and the inner support bearing is positioned in the groove and disposed over the first end of the input shaft, or wherein the first end of the input shaft is provided with a groove and the first end of the output shaft extends into the groove in the axial direction of the inner magnetic ring and the inner support bearing is positioned in the groove and disposed over the first end of the output shaft.

5. The permanent magnet gear change device according to claim 1, wherein the inner magnetic ring includes an inner magnetic ring permanent magnet and an inner magnetic ring iron core, the inner magnetic ring permanent magnet being provided on an outer circumferential surface of the inner magnetic ring iron core, the outer magnetic ring includes an outer magnetic ring permanent magnet and an outer magnetic ring iron core, the outer magnetic ring permanent magnet being provided on an inner circumferential surface of the outer magnetic ring iron core;

wherein the permanent magnet gear change further comprises:

a first magnetic shield ring and a second magnetic shield ring, the inner magnet ring permanent magnet being located between the first magnetic shield ring and the second magnetic shield ring in an axial direction of the inner magnet ring so as to shield an end magnetic field of the inner magnet ring permanent magnet; and/or

The outer magnetic ring permanent magnet is positioned between the third magnetic shielding ring and the fourth magnetic shielding ring in the axial direction of the inner magnetic ring so as to shield the end magnetic field of the outer magnetic ring permanent magnet.

6. The permanent magnet gear shifting device according to claim 5, wherein the first magnetic shielding ring and the second magnetic shielding ring are formed by stacking a plurality of first silicon steel sheets, adjacent first silicon steel sheets are bonded and isolated from each other through a non-conductive adhesive layer, the third magnetic shielding ring and the fourth magnetic shielding ring are formed by stacking a plurality of second silicon steel sheets, and adjacent second silicon steel sheets are bonded and isolated from each other through a non-conductive adhesive layer.

7. The permanent magnet gear change unit according to claim 5,

the inner magnetic ring permanent magnet and the inner magnetic ring iron core are provided with a first end face and a second end face which are opposite in the axial direction of the inner magnetic ring, the first end face of the inner magnetic ring permanent magnet is flush with the first end face of the inner magnetic ring iron core, the second end face of the inner magnetic ring permanent magnet is flush with the second end face of the inner magnetic ring iron core, the first magnetic shielding ring is in contact with the first end face of the inner magnetic ring permanent magnet and the first end face of the inner magnetic ring iron core, and the second magnetic shielding ring is in contact with the second end face of the inner magnetic ring permanent magnet and the second end face of the inner magnetic ring iron core;

the outer magnetic ring permanent magnet and the outer magnetic ring iron core are respectively provided with a first end face and a second end face which are opposite in the axial direction of the inner magnetic ring, the first end face of the outer magnetic ring permanent magnet is flush with the first end face of the outer magnetic ring iron core, the second end face of the outer magnetic ring permanent magnet is flush with the second end face of the outer magnetic ring iron core, the third magnetic shielding ring is in contact with the first end face of the outer magnetic ring permanent magnet and the first end face of the outer magnetic ring iron core, and the fourth magnetic shielding ring is in contact with the second end face of the outer magnetic ring permanent magnet and the second end face of the outer magnetic ring iron core.

8. The permanent magnet gear change of claim 1 wherein said flux ring comprises:

the framework comprises a first end ring and a second end ring which are opposite in the axial direction of the pouring type magnetic adjusting ring, and further comprises a plurality of reinforcing columns which are arranged at intervals along the circumferential direction of the pouring type magnetic adjusting ring, the first end of each reinforcing column is connected with the first end ring, and the second end of each reinforcing column is connected with the second end ring; and

the magnetic conduction blocks are arranged at intervals along the circumferential direction of the pouring type magnetic regulation ring and are positioned between the first end ring and the second end ring in the axial direction of the pouring type magnetic regulation ring, a pouring gap is formed between every two adjacent magnetic conduction blocks, and a non-magnetic conduction pouring body is filled in the pouring gap so as to be poured on the framework and the magnetic conduction blocks.

9. The permanent magnet gear shifting device according to claim 8, wherein at least a portion of the reinforcing columns form a plurality of reinforcing column groups arranged at intervals in sequence along a circumferential direction of the cast magnetism adjusting ring, each reinforcing column group includes a first reinforcing column and a second reinforcing column, the plurality of magnetic conductive blocks and the plurality of reinforcing column groups correspond to each other one by one, and each magnetic conductive block is sandwiched between the first reinforcing column and the second reinforcing column of the reinforcing column group corresponding to the magnetic conductive block.

10. The permanent magnet gear change unit according to claim 9,

the first reinforcing column and the second reinforcing column in each pair of reinforcing column groups are arranged inside and outside, each magnetic conduction block is located between the first reinforcing column and the second reinforcing column of the corresponding reinforcing column group in the radial direction of the cast magnetic regulation ring, a first positioning groove is formed in the outer side face of each magnetic conduction block, at least one part of the first reinforcing column is matched in the first positioning groove, a second positioning groove is formed in the inner side face of each magnetic conduction block, and at least one part of the second reinforcing column is matched in the second positioning groove;