CN106655704A - Halbach array permanent magnet face gear set for orthogonal shaft drive - Google Patents

Abstract

The invention relates to a Halbach array type permanent magnet face gear set for orthogonal shaft transmission, which belongs to the field of electromechanical transmission. In order to solve the problem of limited torque transmitted by permanent magnet face gears and bevel gears currently used in orthogonal shaft transmission. A kind of Halbach array type permanent magnet surface gear set used for orthogonal shaft transmission of the present invention, its composition comprises two wheels, and two wheels are magnetic gears, and two wheels are column wheel and plane wheel respectively, and plane wheel is horizontal Setting, the column wheel is set above the plane wheel, and the centerline of the axis of the column wheel and the plane wheel is orthogonal, and there is an air gap between the column wheel and the plane wheel; when one of the wheels is the driving wheel, the other wheel is the slave wheel. The driving wheel, the driving wheel drives the driven wheel to rotate through magnetic force. The invention adopts the permanent magnet of the Halbach array to generate stronger air gap magnetic density, and can transmit larger torque.

Description

A Halbach array permanent magnet face gear set for orthogonal shaft transmission

technical field

The invention relates to the field of electromechanical transmission, in particular to a Halbach array permanent magnet face gear set for orthogonal shaft transmission.

Background technique

At present, bevel gears and face gears are mostly used in the transmission of orthogonal shafts. The shape of the tooth surface of the bevel gear is complex, and it is difficult to process and manufacture. The parameters of different brands of bevel gears are also different, and in the production process, they are usually manufactured in pairs, which causes great troubles to the processing, repair and maintenance of bevel gears. Since the tool size required for processing face gears is the same as the actual meshing cylindrical gear, the number of tools required to process face gears of different sizes and parameters is relatively large, and the processing cost is high; There is a sharp angle phenomenon, so the tooth width cannot be designed too long, and the transmission strength is limited.

In recent years, magnetic gears that rely on magnetic force for power transmission have been greatly developed. Magnetic gears can realize non-contact transmission, avoid direct mechanical contact between the driving shaft and the driven shaft, reduce noise and vibration, have no pollution to the working environment, and have the characteristics of overload protection.

According to the characteristics of bevel gears and face gears, someone correspondingly proposed permanent magnet face gears and permanent magnet bevel gears that can realize orthogonal shaft transmission. Due to the gear structure, the number of magnetic poles in the meshing area is relatively small, so the torque that can be transmitted is greatly limited.

Contents of the invention

The purpose of the present invention is to solve the problem that the torque of the permanent magnet face gear and bevel gear transmission currently used for orthogonal shaft transmission is limited, and a Halbach array permanent magnet face gear set for orthogonal shaft transmission is provided .

Realize above-mentioned purpose, the technical scheme that the present invention takes is:

A Halbach array permanent magnet face gear set for orthogonal shaft transmission, which consists of two wheels, the two wheels are magnetic gears, and the two wheels are respectively a cylindrical wheel and a flat wheel, and the described The plane wheel is arranged horizontally, and the column wheel is arranged above the plane wheel, and the axis centerlines of the column wheel and the plane wheel are orthogonal, and there is an air gap between the column wheel and the plane wheel; when one of the wheels is a driving wheel , the other wheel is a driven wheel, and the driving wheel drives the driven wheel to rotate through magnetic force.

The beneficial effect of the present invention relative to prior art is:

1. Since there is no direct mechanical contact between the driving gear and the driven gear, the gear set has no wear, low noise, high transmission efficiency, high reliability, maintenance-free, overload protection, etc.;

2. The permanent magnets of the Halbach array can generate stronger air-gap magnetic density and can transmit larger torque;

3. The yoke of the gear set (including the cylindrical wheel yoke and the plane wheel yoke) can be made of non-magnetic material, so that the gear set has a lower moment of inertia and better quick response ability, and it is beneficial to reduce costs.

To sum up, the present invention is suitable for occasions that have high requirements on noise, cleanliness and reliability and where two shaft systems are isolated from each other.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the Halbach array type permanent magnet face gear set for orthogonal shaft transmission of the present invention;

Figure 2 is an exploded view of the cylindrical wheel;

Fig. 3 is the front view of cylindrical wheel;

Fig. 4 is A-A sectional view of Fig. 3;

Fig. 5 is a front view of a plurality of tile-shaped permanent magnets in the cylindrical wheel arranged on the outer circumferential surface of the yoke of the cylindrical wheel;

Figure 6 is an exploded view of the plane wheel;

Fig. 7 is the top view of plane wheel;

Fig. 8 is the B-B sectional view of Fig. 7;

Fig. 9 is a top view of a plurality of sector-shaped permanent magnets in the plane wheel arranged at the outer edge of the upper surface of the plane wheel yoke;

Figure 10 is a top view of Figure 1;

Fig. 11 is the left view of Fig. 1;

Fig. 12 is a structural schematic diagram of tile-shaped permanent magnets adopting parallel magnetization;

Fig. 13 is a structural schematic diagram of a tile-shaped permanent magnet adopting radial magnetization.

In the figure: cylindrical wheel 1, plane wheel 2, front end ring 3-1, rear end ring 3-2, cylindrical wheel yoke 4, axial center hole 1 4-1, keyway 1 4-2, tile-shaped permanent magnet 5. The first type of tile-shaped permanent magnet 5-1, the second type of tile-shaped permanent magnet 5-2, the third type of tile-shaped permanent magnet 5-3, the fourth type of tile-shaped permanent magnet 5-4, Protective cover body 6, upper end ring 7, outer protective cover 8, sector-shaped permanent magnet 9, first-type sector-shaped permanent magnet 9-1, second-type sector-shaped permanent magnet 9-2, third-type sector-shaped permanent magnet 9-3, Four-type sector-shaped permanent magnet 9-4, inner protective sleeve 10, plane wheel yoke 11, axial center hole 2 11-1, key groove 2 11-2.

detailed description

Specific embodiment one: as shown in Fig. 1, Fig. 10 and Fig. 11, a kind of Halbach array type permanent magnet face gear set used for orthogonal axis transmission of the present embodiment, its composition comprises two wheels, and described two The two wheels are all magnetic gears, and the two wheels are respectively a cylindrical wheel 1 and a flat wheel 2. The flat wheel 2 is arranged horizontally, and the cylindrical wheel 1 is arranged above the flat wheel 2, and the cylindrical wheel 1 and the flat wheel 2 The centerlines of the wheel shafts are perpendicular to each other, and there is an air gap between the cylindrical wheel 1 and the flat wheel 2 (theoretically, the smaller the air gap, the greater the torque that can be transmitted, but it should be combined with the actual installation space and the required transmission torque. When one of the wheels is a driving wheel, the other wheel is a driven wheel, and the driving wheel drives the driven wheel to rotate through magnetic force.

Specific embodiment two: as shown in Figures 1 to 13, a Halbach array permanent magnet face gear set for orthogonal shaft transmission described in specific embodiment one, the cylindrical wheel 1 includes a cylindrical wheel yoke 4 and a plurality of tile-shaped permanent magnets 5; the cylindrical wheel yoke 4 is provided with an axial center hole 4-1, and the inner wall of the axial center hole 4-1 of the cylindrical wheel yoke 4 is along the axial direction A keyway 4-2 for cooperating with the shafting is provided;

The plurality of tile-shaped permanent magnets 5 include a plurality of first type tile-shaped permanent magnets 5-1, a plurality of second type tile-shaped permanent magnets 5-2, and a plurality of third type tile-shaped permanent magnets 5-3 and a plurality of fourth-type tile-shaped permanent magnets 5-4, the plurality of first-type tile-shaped permanent magnets 5-1, a plurality of second-type tile-shaped permanent magnets 5-2, and more A third-type tile-shaped permanent magnet 5-3 and a plurality of fourth-type tile-shaped permanent magnets 5-4 are all fixed on the outer circumferential surface of the cylindrical wheel yoke 4 by bonding, and a plurality of first-type permanent magnets Tile-shaped permanent magnets 5-1, multiple second-type tile-shaped permanent magnets 5-2, multiple third-type tile-shaped permanent magnets 5-3, and multiple fourth-type tile-shaped permanent magnets 5-4 Sequentially according to the first type tile-shaped permanent magnet 5-1, the second type tile-shaped permanent magnet 5-2, the third type tile-shaped permanent magnet 5-3 and the fourth type tile-shaped permanent magnet 5-4 The order of arrangement is circularly arranged (that is, in the form of a Halbach array) to form a ring-shaped permanent magnet. A plurality of first-type tile-shaped permanent magnets 5-1 and a plurality of third-type tile-shaped permanent magnets 5-3 are all cut direction magnetization, and the magnetization direction of each adjacently arranged first type tile-shaped permanent magnet 5-1 is opposite to that of the third type tile-shaped permanent magnet 5-3, and the plurality of second type tile-shaped permanent magnets Both the permanent magnet 5-2 and the fourth-type tile-shaped permanent magnet 5-4 are magnetized radially (as shown in Figure 13) or in parallel (as shown in Figure 12), and each adjacent second-type tile The magnetization direction of the sheet-shaped permanent magnet 5-2 is opposite to that of the fourth-type tile-shaped permanent magnet 5-4 (because the permanent magnet adopts the Halbach array, a unilateral magnetic field distribution is formed);

The plane wheel 2 includes a plane wheel yoke 11 and a plurality of sector-shaped permanent magnets 9; the plane wheel yoke 11 is provided with an axial center hole 11-1, and the axial center hole 2 of the plane wheel yoke 11 On the inner wall of 11-1, a keyway 2 11-2 for cooperating with shafting 2 is opened in the axial direction; the plurality of sector-shaped permanent magnets 9 includes a plurality of first-type sector-shaped permanent magnets 9-1, a plurality of second type sector permanent magnet 9-2, a plurality of third type sector permanent magnets 9-3 and a plurality of fourth type sector permanent magnets 9-4; the plurality of first type sector permanent magnets 9-1, a plurality of the first The second-type sector-shaped permanent magnet 9-2, the plurality of third-type sector-shaped permanent magnets 9-3 and the plurality of fourth-type sector-shaped permanent magnets 9-4 are all vertically arranged and fixed on the plane yoke portion 11 by bonding. At the outer edge of the surface, and a plurality of first-type sector-shaped permanent magnets 9-1, a plurality of second-type sector-shaped permanent magnets 9-2, a plurality of third-type sector-shaped permanent magnets 9-3 and a plurality of fourth-type sector-shaped permanent magnets The magnets 9-4 are arranged cyclically according to the arrangement order of the first-type sector-shaped permanent magnet 9-1, the second-type sector-shaped permanent magnet 9-2, the third-type sector-shaped permanent magnet 9-3 and the fourth-type sector-shaped permanent magnet 9-4 Arranging (that is, adopting the Halbach array form) to form a cylindrical permanent magnet, a plurality of first-type sector-shaped permanent magnets 9-1 and a plurality of third-type sector-shaped permanent magnets 9-3 are magnetized in a tangential direction and both are magnetized Direction is opposite, and the second type sector permanent magnet 9-2 of every adjacent setting and the fourth type sector permanent magnet 9-4 magnetization direction are parallel to the axial direction of plane wheel 2 and both magnetization directions are opposite (because permanent magnet adopts Halbach array, forming a unilateral magnetic field distribution).

Specific embodiment three: as shown in Fig. 2 ~ Fig. 4, a kind of Halbach array type permanent magnet face gear set for orthogonal shaft transmission described in specific embodiment one or two, described cylindrical wheel yoke 4 and The plane yoke parts 11 are made of non-magnetic materials.

Specific embodiment four: as shown in Fig. 2 and Fig. 4, a kind of Halbach array type permanent magnet face gear set that is used for orthogonal axis transmission described in specific embodiment two, described cylindrical wheel 1 also includes front end ring 3 -1. The rear end ring 3-2 and the protective sleeve body 6; the front end ring 3-1 and the rear end ring 3-2 are respectively fixed on the front and rear end surfaces of a plurality of tile-shaped permanent magnets 5 by bonding Above, the protective cover body 6 is tightly fitted on the outside of a plurality of tile-shaped permanent magnets 5, and the front ring 3-1, the rear end ring 3-2 and the protective cover body 6 are all made of non-magnetic materials.

The functions of setting the front end ring 3-1, the rear end ring 3-2 and the protective sleeve body 6 are all to protect the main body of the cylindrical wheel 1 (including the cylindrical wheel yoke 4 and a plurality of tile-shaped permanent magnets 5). The protection structure for the main part of the column wheel 1 is not limited to the above structure, and can be varied.

Specific embodiment five: as shown in Fig. 2 and Fig. 4, a kind of Halbach array type permanent magnet face gear set that is used for orthogonal shaft transmission described in specific embodiment four, described front end ring 3-1, rear end Both the ring 3-2 and the protective sleeve body 6 are made of stainless steel or glass ribbon material. Each tile-shaped permanent magnet 5 can avoid structural damage and oxidation, forming effective protection for each tile-shaped permanent magnet 5 .

Specific embodiment six: as shown in Fig. 6 ~ Fig. 8, a kind of Halbach array type permanent magnet face gear set that is used for orthogonal shaft transmission described in specific embodiment two, described plane wheel 2 also comprises upper end ring 7 , an outer protective cover 8 and an inner protective cover 10; the outer protective cover 8 and the inner protective cover 10 are respectively tightly fitted on the outside and the inner side of the cylindrical permanent magnet, and the upper end ring 7 is fixed on the The upper end surface of the cylindrical permanent magnet, the upper end ring 7, the outer protective cover 8 and the inner protective cover 10 are all made of non-magnetic materials.

The functions of setting the upper end ring 7 , the outer protective cover 8 and the inner protective cover 10 are to protect the main body of the plane wheel 2 (including the plane wheel yoke 11 and a plurality of sector permanent magnets 9 ). The protection structure for the main part of the plane wheel 2 is not limited to the above structure, and can be varied.

Specific embodiment seven: as shown in Fig. 6 ~ Fig. 8, a kind of Halbach array type permanent magnet face gear set that is used for orthogonal shaft transmission described in specific embodiment six, described upper end ring 7, outer protective sleeve 8 And inner protective cover 10 all adopt stainless steel or glass ribbon material to make. Each sector-shaped permanent magnet 9 can avoid structural damage and oxidation, forming effective protection for each sector-shaped permanent magnet 9 .

Embodiment 8: As shown in Fig. 4 and Fig. 8, a kind of Halbach array type permanent magnet surface gear set for orthogonal shaft transmission described in Embodiment 2, a plurality of tiles of the cylindrical wheel 1 The number of pole pairs of the permanent magnet 5 9 pole pairs of multiple sector permanent magnets with flat wheels 2 , should satisfy the following relationship:

In the formula, with Respectively, the rotational speeds of cylindrical wheel 1 and flat wheel 2, rad/s; is the transmission ratio.

The beneficial effect of this embodiment is that the torque and the transmission ratio of the gear set can be kept constant during operation, so as to realize the smooth transmission of torque.

Specific embodiment nine: as shown in Fig. 4, Fig. 5, Fig. 8 and Fig. 9, a kind of Halbach array type permanent magnet face gear set for orthogonal shaft transmission described in specific embodiment two, described multiple The thickness of the tile-shaped permanent magnet 5 is equal to the thickness of a plurality of sector-shaped permanent magnets 9, the axial length of the plurality of tile-shaped permanent magnets 5 is equal to the radial length of the plurality of sector-shaped permanent magnets 9, and tangential magnetization is adopted. Multiple first-type tile-shaped permanent magnets 5-1, multiple third-type tile-shaped permanent magnets 5-3, multiple first-type sector-shaped permanent magnets 9-1 and multiple third-type sector-shaped permanent magnets 9 The polar arc coefficients of -3 are all between 0.3-0.5, and a plurality of first-type tile-shaped permanent magnets 5-1, a plurality of third-type tile-shaped permanent magnets 5-3, and a plurality of first-type sector-shaped permanent magnets The polar arc coefficients of the magnet 9-1 and the plurality of third-type sector-shaped permanent magnets 9-3 are the same.

The beneficial effect of this embodiment is: to prevent the permanent magnet from being demagnetized during operation, and to prevent the gear set from failing.

Specific embodiment ten: as shown in Fig. 10 and Fig. 11, a kind of Halbach array type permanent magnet face gear set for orthogonal shaft transmission described in specific embodiment 2, the two front and rear end faces of the described cylindrical wheel 1 Align (tangent) with the two inner and outer arc lines of the plane wheel 2.

The beneficial effect of this embodiment is that the coupling area is ensured to be as large as possible, and greater torque can be transmitted.

Working principle: as shown in Fig. 4, Fig. 5, Fig. 8 and Fig. 9, a plurality of second-type tile-shaped permanent magnets 5-2 and a plurality of fourth-type tile-shaped permanent magnets 5-4 on the cylindrical wheel 1 The magnetic field produced is coupled with the magnetic field produced by a plurality of second-type sector-shaped permanent magnets 9-2 and a plurality of fourth-type sector-shaped permanent magnets 9-4 on the plane wheel 2, and the main magnetic flux passes through the second-type tile-shaped permanent magnets in turn 5-2→Type 1 tile-shaped permanent magnet 5-1 (or type 3 tile-shaped permanent magnet 5-3)→Type 4 tile-shaped permanent magnet 5-4→air gap→Second-type sector permanent magnet Magnet 9-2→first type sector permanent magnet 9-1 (or third type sector permanent magnet 9-3)→fourth type sector permanent magnet 9-4→second type tile-shaped permanent magnet 5-2 forms a closure circuit. The main magnetic flux of the permanent magnet of the Halbach array hardly passes through the yoke (including the cylindrical yoke 4 and the planar yoke 11) to form a unilateral magnetic field distribution, the air gap magnetic field is significantly enhanced, and the torque that can be transmitted becomes larger.

Due to the magnetic force generated between the permanent magnets (including multiple tile-shaped permanent magnets 5 and multiple sector-shaped permanent magnets 9), the rotation of the driving wheel will drive the rotation of the driven wheel. When there is a load on the driven wheel, the two wheels are in the coupling area, and the center of the outer circumferential surface of a plurality of tile-shaped permanent magnets 5 fixed on the outer circumferential surface of the cylindrical wheel yoke 4 is connected to the center of the outer circumferential surface by a plurality of sector-shaped permanent magnets 9. The centers of the outer circumferential surfaces of the formed cylindrical permanent magnets are not directly opposite, and will be staggered by a certain angle, and the greater the load, the greater the staggered angle. When the center of the outer circumferential surface of the annular permanent magnet and the center of the outer circumferential surface of the cylindrical permanent magnet are staggered by 90° electrical angle, the torque that can be transmitted reaches the maximum. When the load exceeds the maximum torque at this time At this time, the two wheels will "slip relative to each other", and the gear set cannot work normally, that is, overload protection has occurred.

Claims (10)

1. it is a kind of for normal axis transmission Halbach array formula permanent-magnet surface gear train, it is characterised in that：Its composition includes two Wheel, two described wheels are magnetic gear, and two wheels are cylinder wheel respectively（1）And face wheel（2）, described face wheel（2） Horizontally disposed, described cylinder wheel（1）It is arranged on face wheel（2）Top, and cylinder wheel（1）And face wheel（2）Wheel shaft center Line is mutually orthogonal, cylinder wheel（1）And face wheel（2）Between leave air gap；When one of wheel is drivewheel, another wheel is Driven pulley, described drivewheel drive driven pulley to rotate by magnetive attraction.

2. it is according to claim 1 it is a kind of for normal axis transmission Halbach array formula permanent-magnet surface gear train, its feature It is：Described cylinder wheel（1）Including cylinder wheel yoke portion（4）With multiple tile shape permanent magnets（5）；Described cylinder wheel yoke portion （4）It is provided with axial center hole one（4-1）, cylinder wheel yoke portion（4）Axial center hole one（4-1）Inwall on offer vertically For the keyway one coordinated with shafting one（4-2）；

Described multiple tile shape permanent magnets（5）Including multiple first type tile shape permanent magnets（5-1）, multiple Second-Type tile shapes Permanent magnet（5-2）, multiple 3rd type tile shape permanent magnets（5-3）And multiple 4th type tile shape permanent magnets（5-4）, described is more Individual first type tile shape permanent magnet（5-1）, multiple Second-Type tile shape permanent magnets（5-2）, multiple 3rd type tile shape permanent magnets （5-3）And multiple 4th type tile shape permanent magnets（5-4）Cylinder wheel yoke portion is fixed on by bonding mode（4）Outer circumference surface On, and multiple first type tile shape permanent magnets（5-1）, multiple Second-Type tile shape permanent magnets（5-2）, multiple 3rd type tile shapes Permanent magnet（5-3）And multiple 4th type tile shape permanent magnets（5-4）Successively according to the first type tile shape permanent magnet（5-1）, second Type tile shape permanent magnet（5-2）, the 3rd type tile shape permanent magnet（5-3）And the 4th type tile shape permanent magnet（5-4）Arrangement it is suitable Sequence cycle arrangement arranges the permanent magnet to form annular shape, multiple first type tile shape permanent magnets（5-1）And multiple 3rd type tiles Shape permanent magnet（5-3）Cutting orientation magnetizing, and the first type tile shape permanent magnet being often disposed adjacent are adopted（5-1）With the 3rd type tile Shape permanent magnet（5-3）Magnetizing direction conversely, described multiple Second-Type tile shape permanent magnets（5-2）And the 4th type tile shape forever Magnet（5-4）Using radial direction or parallel magnetization, and the Second-Type tile shape permanent magnet being often disposed adjacent（5-2）With the 4th type watt Piece shape permanent magnet（5-4）Magnetizing direction it is contrary；

Described face wheel（2）Including face wheel yoke portion（11）With multiple fan-shaped permanent magnets（9）；Described face wheel yoke portion（11） It is provided with axial center hole two（11-1）, face wheel yoke portion（11）Axial center hole two（11-1）Inwall on offer vertically For the keyway two coordinated with shafting two（11-2）；Described multiple fan-shaped permanent magnet（9）Including multiple first types sector permanent magnetism Body（9-1）, multiple Second-Types sector permanent magnets（9-2）, multiple 3rd types sector permanent magnets（9-3）And multiple 4th types are fan-shaped forever Magnet（9-4）；Described multiple first type sector permanent magnets（9-1）, multiple Second-Types sector permanent magnets（9-2）, multiple three Type sector permanent magnet（9-3）And multiple 4th type sector permanent magnets（9-4）It is vertically arranged and is fixed on by bonding mode flat Face wheel yoke portion（11）Upper surface outer edge, and multiple first types sector permanent magnet（9-1）, multiple Second-Types sector permanent magnetism Body（9-2）, multiple 3rd types sector permanent magnets（9-3）And multiple 4th type sector permanent magnets（9-4）Fan according to the first type successively Shape permanent magnet（9-1）, Second-Type sector permanent magnet（9-2）, the 3rd type sector permanent magnet（9-3）And the 4th type sector permanent magnet （9-4）The cycle arrangement that puts in order the permanent magnet to form cylindrical shape, multiple first types sector permanent magnets are set（9-1）With it is multiple 3rd type sector permanent magnet（9-3）Using cutting orientation magnetizing and the two magnetizing direction is conversely, the Second-Type that is often disposed adjacent is fan-shaped Permanent magnet（9-2）With the 4th type sector permanent magnet（9-4）Magnetizing direction and face wheel（2）Axially in parallel and the two magnetizing direction On the contrary.

3. it is according to claim 1 and 2 it is a kind of for normal axis transmission Halbach array formula permanent-magnet surface gear train, its It is characterised by：Described cylinder wheel yoke portion（4）With face wheel yoke portion（11）Made using non-permeable material.

4. it is according to claim 2 it is a kind of for normal axis transmission Halbach array formula permanent-magnet surface gear train, its feature It is：Described cylinder wheel（1）Also include front end ring（3-1）, rear end ring（3-2）With protection body（6）；Described front end ring （3-1）With rear end ring（3-2）Multiple tile shape permanent magnets are fixed on by bonding mode respectively（5）Former and later two end faces on, Described protection body（6）Multiple tile shape permanent magnets are sleeved on closely（5）Outside, front end ring（3-1）, rear end ring（3-2） With protection body（6）Made using non-permeable material.

5. it is according to claim 4 it is a kind of for normal axis transmission Halbach array formula permanent-magnet surface gear train, its feature It is：Described front end ring（3-1）, rear end ring（3-2）With protection body（6）Rustless steel or glass tape material system are adopted Into.

6. it is according to claim 2 it is a kind of for normal axis transmission Halbach array formula permanent-magnet surface gear train, its feature It is：Described face wheel（2）Also include top ring（7）, outer jointing jacket（8）And internal protective cover（10）；Described outer jointing jacket （8）And internal protective cover（10）The outside and inner side of the permanent magnet of cylindrical shape, described top ring are sleeved on respectively closely（7）Pass through Bonding mode is fixed on the upper surface of the permanent magnet of cylindrical shape, top ring（7）, outer jointing jacket（8）, internal protective cover（10）Adopt Non-permeable material is made.

7. it is according to claim 6 it is a kind of for normal axis transmission Halbach array formula permanent-magnet surface gear train, its feature It is：Described top ring（7）, outer jointing jacket（8）And internal protective cover（10）Made using rustless steel or glass tape material.

8. it is according to claim 2 it is a kind of for normal axis transmission Halbach array formula permanent-magnet surface gear train, its feature It is：Described cylinder wheel（1）Multiple tile shape permanent magnets（5）Number of pole-pairsWith face wheel（2）Multiple fan-shaped permanent magnetism Body（9）Number of pole-pairs, following relational expression should be met：

In formula,WithThe respectively rotating speed of cylinder wheel 1 and face wheel 2, rad/s；For gear ratio.

9. it is according to claim 2 it is a kind of for normal axis transmission Halbach array formula permanent-magnet surface gear train, its feature It is：Described multiple tile shape permanent magnets（5）Thickness and multiple fan-shaped permanent magnets（9）Thickness it is equal, multiple tiles Shape permanent magnet（5）Axial length and multiple fan-shaped permanent magnets（9）Radical length it is equal, using multiple the first of cutting orientation magnetizing Type tile shape permanent magnet（5-1）, multiple 3rd type tile shape permanent magnets（5-3）, multiple first types sector permanent magnets（9-1）And it is many Individual 3rd type sector permanent magnet（9-3）Pole embrace between 0.3-0.5, and multiple first type tile shape permanent magnets（5- 1）, multiple 3rd type tile shape permanent magnets（5-3）, multiple first types sector permanent magnets（9-1）And multiple 3rd type sector permanent magnetism Body（9-3）Pole embrace it is identical.

10. a kind of Halbach array formula permanent-magnet surface gear train for normal axis transmission according to claim 2, which is special Levy and be：Described cylinder wheel（1）Former and later two end faces and face wheel（2）The alignment of inside and outside two circular arc lines arrange.