CN114429848B - Multipolar tubular permanent magnet and assembly device and assembly method thereof - Google Patents

Abstract

The invention relates to the field of permanent magnets, in particular to a multi-pole tubular permanent magnet and an assembling device and an assembling method thereof, wherein the multi-pole tubular permanent magnet comprises: a plurality of magnetic circuit units arranged in an axial direction, each of the magnetic circuit units including: the first magnetic ring, the second magnetic ring, the third magnetic ring and the fourth magnetic ring are axially coaxial and sequentially arranged in an adjacent position; the first magnetic ring is magnetized radially inwards; the second magnetic ring is magnetized axially; the magnetization direction of the third magnetic ring is opposite to that of the first magnetic ring; the magnetization direction of the fourth magnetic ring is opposite to that of the second magnetic ring; the multipole tubular permanent magnet provided by the invention is spliced by the annular magnet and the annular magnet, the permanent magnet with multipole axial alternate magnetic poles can be obtained by splicing the annular magnets with rectangular sections, the magnetic field intensity is enhanced, the overall performance is higher, and the multipole tubular permanent magnet is not easy to crack.

Description

A kind of multi-pole tubular permanent magnet and its assembly device and assembly method

technical field

The invention relates to the technical field of permanent magnets, in particular to a multi-pole tubular permanent magnet, an assembling device and an assembling method thereof.

Background technique

With the development of magnetic drive equipment, household appliances and information industry, the application of multi-pole tubular permanent magnets is becoming more and more extensive, and the needs of industry and technology for it are becoming more and more urgent. In the existing industrial application of permanent magnets, it is unavoidable to use multi-pole tubular permanent magnets whose magnetic poles are alternately arranged axially or radially along the cylindrical surface of the magnetic ring tube. Existing tubular permanent magnets include multi-pole permanent magnets such as Halbach array permanent magnets or combined magnetic ring permanent magnets. Most of these tubular permanent magnets are assembled by annular permanent magnets. For example, Halbach array permanent magnets are composed of multiple annular magnets in radial array Spliced together, due to the attractive or repulsive force of the magnet itself, the larger the ring magnet, the stronger the magnetic field force. During the assembly process, it is easy to collide and damage due to the magnetic force. Therefore, the existing Halbach permanent magnets are more For small magnetic bearings. Moreover, in order to increase the intensity of the radial magnetic field as much as possible, it is necessary to make full use of the space as much as possible. For example, the entire cylindrical surface is covered with permanent magnets. The existing combined magnetic rings are assembled at intervals in the axial or radial direction, and there is a magnetic ring tube magnetic field strength. Smaller, lower overall performance issues.

Existing multi-pole permanent magnets are mainly assembled by multi-pole magnetization or oriented magnetization, but multi-pole magnetization has the problems of difficult magnetization and high cost; because rare earth permanent magnets are relatively brittle, annular permanent magnets are And brittle fragmentation is prone to occur during use, the existing permanent magnet assembly device cannot meet the assembly of multi-pole permanent magnets, and the problem that it is easy to be damaged during the assembly process; moreover, the radial multi-pole permanent magnets assembled after magnetization, Since there may be a large attractive or repulsive force between the magnetic rings, the larger the ring magnet, the stronger the magnetic field force. At present, there is no assembly scheme for large-diameter magnetic ring tubes.

Contents of the invention

The purpose of the present invention is to solve the problem that in the prior art, the permanent magnets of the magnetic ring tube are mostly assembled by ring magnets, and there is a large gap between the ring magnets, which causes the magnetic field intensity of the magnetic ring tube to decrease and the overall performance is not high. , providing a multi-pole tubular permanent magnet; aiming at the problem that the assembly device and assembly scheme in the prior art cannot be assembled into a large multi-pole permanent magnet, and the magnetic body is easily damaged during the assembly process, an assembly of a multi-pole tubular permanent magnet is provided Device and method of assembly.

In order to achieve the above object, the technical solution provided by the invention is:

A multi-pole tubular permanent magnet has a magnetic field circuit of multiple S-N magnetic poles along the axial direction of the multi-pole tubular permanent magnet, and includes a plurality of magnetic circuit units arranged along the axial direction, each of which includes: A first magnetic ring, a second magnetic ring, a third magnetic ring, and a fourth magnetic ring arranged axially coaxially and adjacently in sequence; the first magnetic ring is magnetized radially inward; the second magnetic ring is axially Magnetization; the magnetization direction of the third magnetic ring is opposite to the magnetization direction of the first magnetic ring; the magnetization direction of the fourth magnetic ring is opposite to the magnetization direction of the second magnetic ring; the first magnetic ring , the inner ring diameters of the second magnetic ring, the third magnetic ring and the fourth magnetic ring are all the same; the first magnetic ring, the second magnetic ring, the third magnetic ring and the The diameters of the outer rings of the fourth magnetic rings are all the same.

In this solution, the axial direction refers to the axial direction of each magnetic ring in the multipolar tubular permanent magnet, and also refers to the axial direction of the assembled multipolar tubular permanent magnet. The radial direction refers to the radial direction of each magnetic ring in the multipolar tubular permanent magnet, and also refers to the radial direction of the assembled multipolar tubular permanent magnet. The ortho position refers to an adjacent position.

In the technical solution provided by the present invention, the annular magnetic body is spliced with the annular magnet, and the first magnetic ring, the second magnetic ring, the third magnetic ring, and the fourth magnetic ring are arranged adjacent to each other in sequence , to avoid the problems of reduced magnetic field strength and low overall performance due to the axial or radial spacing of the assembled magnetic bodies.

In the multi-pole tubular permanent magnet, the first magnetic ring is radially magnetized, the second magnetic ring is axially magnetized, and the magnetization direction of the third magnetic ring is opposite to the magnetization direction of the first magnetic ring. The magnetization direction of the fourth magnetic ring is opposite to that of the second magnetic ring, and the first magnetic ring, the second magnetic ring, the third magnetic ring, and the fourth magnetic ring are placed along the magnetic ring The sequential adjacent configuration, a magnetic field circuit of S-N magnetic poles is formed outside the magnetic circuit unit, and then a plurality of magnetic circuit units are arranged adjacent to each other in the axial direction to form a permanent magnet along the multi-pole tube. The magnetic field circuit of multiple S-N magnetic poles in the axial direction forms a permanent magnet with alternating multi-pole magnetic poles in the axial direction. At the same time, the axial and radial directions of the multi-polar tubular permanent magnet are covered with ring-shaped magnetic bodies, thereby enhancing the magnetic field strength. , which improves the performance of multipole tubular permanent magnets.

As a preferred solution of the present invention, the first magnetic ring and the third magnetic ring are metal magnetic bodies; the second magnetic ring and the fourth magnetic ring are permanent magnets. In this solution, metal magnetic bodies and permanent magnets are cross-arranged to ensure the overall performance of the permanent magnets, save the materials used for the permanent magnets, and reduce the cost.

As a preferred solution of the present invention, the magnetic circuit unit further includes optional: a fifth magnetic ring, a sixth magnetic ring, a seventh magnetic ring and an eighth magnetic ring; the fifth magnetic ring is arranged on the Between the first magnetic ring and the second magnetic ring, the fifth magnetic ring is magnetized obliquely inward; the sixth magnetic ring is arranged between the second magnetic ring and the third magnetic ring, and the The magnetization direction of the sixth magnetic ring is a direction in which the magnetization direction of the fifth magnetic ring rotates 90° clockwise; the seventh magnetic ring is arranged between the third magnetic ring and the fourth magnetic ring, The magnetization direction of the seventh magnetic ring is opposite to that of the fifth magnetic ring; the eighth magnetic ring is arranged axially adjacent to the fourth magnetic ring, and the magnetization direction of the eighth magnetic ring The magnetization direction of the sixth magnetic ring is opposite; the inner ring diameters of the fifth magnetic ring, the sixth magnetic ring, the seventh magnetic ring and the eighth magnetic ring are all the same as the first magnetic ring. The diameter of the inner ring of the ring is the same; same.

In this embodiment, the obliquely inward refers to an oblique direction that has an included angle with both the axial and radial directions, and obliquely inward refers to not only obliquely but also inclined toward the inner ring, that is, the obliquely inward direction is the same as that of the inner ring. The included angle in the radially inner direction is an acute angle.

In this embodiment, an obliquely inwardly magnetized fifth magnetic ring is arranged between the first magnetic ring and the second magnetic ring, and the first magnetic ring is a radially inner magnetic ring, and the second magnetic ring The ring is axially magnetized. After the fifth magnetic ring is configured, according to the magnetic field strength vector superposition principle, the magnetic field strength of the fifth magnetic ring fills the obliquely inward magnetic field strength vector, making the magnetic field denser and achieving the purpose of enhancing the magnetic field strength. Similarly, The configurations of the sixth magnetic ring, the seventh magnetic ring and the eighth magnetic ring all achieve the purpose of enhancing the strength of the magnetic field, thereby improving the overall performance of the multipolar tubular permanent magnet.

As a preferred solution of the present invention, the first magnetic ring, the second magnetic ring, the third magnetic ring, the fourth magnetic ring, the fifth magnetic ring, the sixth magnetic ring, the Both the seventh magnetic ring and the eighth magnetic ring are permanent magnets. This solution further improves the overall performance of the multi-pole tubular permanent magnet by adopting permanent magnet configuration.

As a preferred solution of the present invention, the magnetization direction of the fifth magnetic ring is a direction in which the magnetization direction of the first magnetic ring rotates clockwise by 45°. It can be seen from the above that the magnetization direction of the first magnetic ring is radially inwardly magnetized, the magnetization direction of the second magnetic ring is axially magnetized, and the magnetization direction of the fifth magnetic ring that is magnetized obliquely inwardly is in the same direction as the radial direction. The angle of the inward magnetization direction is 45°. According to the principle of superposition of the magnetic field strength vector, the component vectors of the fifth magnetic ring in the magnetization direction of the first magnetic ring and the second magnetic ring are equal in size, and the components The contribution is a positive value, so that the magnetic field is denser in the oblique direction, the overall magnetic field strength is further enhanced, and the overall performance of the permanent magnet is further improved.

In view of the problem that the assembly device in the prior art is easy to damage the magnetic body during the assembly process and cannot be assembled into a large multi-pole permanent magnet, the technical solution provided by the present invention is:

An assembly device for a multi-pole tubular permanent magnet, comprising: an inner sleeve, a barrier assembly and a base; the materials of the inner sleeve and the barrier assembly are non-magnetic materials; the lower end of the inner sleeve and the The base is fixedly connected, and the inner sleeve is used to bind the magnetic rings of the multi-pole tubular permanent magnet to be arranged in the axial direction; the barrier assembly includes: a barrier sleeve, a plurality of sleeve through holes, a plurality of a locking pin;

The inner diameter of the barrier sleeve is equivalent to the outer diameter of the magnetic ring; the through hole of the sleeve is opened on the side wall of the barrier sleeve; one end of the locking pin passes through the through hole of the sleeve And extend to the inside of the barrier sleeve, the part of the locking pin extending to the barrier sleeve is used to support the magnetic ring placed in the barrier sleeve, the locking pin extends to the barrier One end inside the casing is provided with a slope.

The inner casing serves to limit the position of the adjacent magnetic rings stacked in the axial direction, and the magnetic rings to be assembled are placed and sleeved outside the inner casing, and each magnetic ring of the tubular permanent magnet can be aligned axially. Axes are arranged adjacently in sequence.

In this embodiment, when it is necessary to assemble the two magnetic rings that attract each other, the locking pin is first passed through the through hole of the sleeve and inserted into the barrier sleeve, and the barrier in the barrier assembly The blocking sleeve is used to place one of the two magnetic rings that are attracted to each other to be assembled, and then the blocking assembly carries one magnetic ring close to the other magnetic ring, and the end of the locking pin that extends into the blocking sleeve is Blocked and supported between two magnetic rings that attract each other. An inclined surface is provided at one end of the locking pin extending into the barrier sleeve, and the distance between one magnetic ring and the other magnetic ring in the barrier sleeve is slowly reduced by slowly pulling out the locking pin in the radial direction. .

The barrier assembly is used in conjunction with the inner sleeve, so that the effects of barrier and slow abutment are realized. Thus avoiding collision damage caused by two magnetic rings attracting each other quickly due to the action of the magnetic field force, avoiding the problem that the assembled magnetic ring is easily damaged, and greatly reducing the damage rate of the assembled magnetic ring.

When assembling large-scale multi-pole permanent magnets, the assembly of large-scale magnetic bodies is labor-intensive, especially the magnetic field force of large-scale magnetic bodies is greater. If there is an attractive force in the assembly, adjacent magnetic bodies will attract each other and easily collide or damage the assembly equipment. Traditional assembly devices cannot overcome a large magnetic field force to achieve assembly. The assembly device of the multi-pole tubular permanent magnet described in the present invention is used in cooperation with the inner casing and the barrier assembly, the inner sleeve can support and bind a large magnetic ring, and the barrier assembly can block a large magnetic ring through the barrier effect. The problem of collision due to a large magnetic field force is avoided between two mutually attracting magnetic rings of the magnetic field force, so that it is suitable for assembling a large tubular multi-pole permanent magnet.

As a preferred solution of the present invention, the assembly device of the multi-pole tubular permanent magnet further includes: a pressing assembly; the pressing assembly includes: a pressing assembly; the pressing assembly includes: a first pressing plate, a second pressing plate, The first tie rod and the second tie rod and the pressure plate nut;

The first pressing plate is provided with a first opening, a first slot and at least three through holes of the first pressing plate; the second pressing plate is provided with a second opening, a second slot and at least three through holes of the second pressing plate;

The width of the first opening is larger than the diameter of the inner casing, and the width of the first opening is smaller than the outer diameter of the multi-pole tubular permanent magnet; one end of the first slot is closed, and the first opening The other end of the groove communicates with the first opening, and the width of the first slot is larger than the outer diameter of the pressure plate nut; all the through holes of the first pressure plate are symmetrically arranged around the first opening; the The through hole of the first pressure plate is used for the passage of the first pull rod;

The width of the second opening is greater than the diameter of the inner casing, and the width of the second opening is smaller than the outer diameter of the multipole tubular permanent magnet; one end of the second slot is closed, and the second opening The other end of the groove communicates with the second opening, and the width of the second slot is larger than the outer diameter of the pressure plate nut; all the through holes of the second pressure plate are symmetrically arranged around the second opening; the The through hole of the second pressure plate is used for the passage of the second tie rod;

One end of the first pull rod and the second pull rod are detachably connected to the base; the number of the first pull rod is the same as the number of through holes of the first pressure plate; the number of the second pull rod The number is the same as the number of through holes of the second pressure plate; the number of the pressure plate nuts matches the number of the first tie rods, and the pressure plate nuts are connected with the first tie rods by bolts.

In this preferred solution, when it is necessary to assemble the magnetic rings that repel each other, through the cooperative use of the pressing assembly, the inner sleeve and the base, the first pressing plate and the second pressing plate of the pressing assembly are provided with The first opening for the inner sleeve to pass through enables the first pressing plate and the second pressing plate to be placed outside the inner sleeve; the width of the first opening is larger than the outer diameter of the inner sleeve and smaller than the outer diameter of the inner sleeve. The outer diameter of the magnetic ring, the first pressure plate moves axially along the inner sleeve to push the mutually repulsive magnetic rings fitted outside the inner sleeve close together, realizing the assembly of the multi-pole tubular permanent magnet Each magnetic ring is arranged adjacent to each other, and the space between the magnetic rings is reduced through the action of the pressing force, which can avoid the problem of low magnetic performance caused by the gap between the magnetic bodies of the multi-pole permanent magnet assembled by the traditional assembly device ;

In the assembly device provided by this solution, the first pressing plate is provided with a first slot and a first pressing plate through hole, the second pressing plate is opened with a second slot and a second pressing plate through hole, and is provided with the first The first tie rods have the same number of through holes in the pressing plate, and the second tie rods have the same number of through holes in the second pressing plate. When in use, first fix the first pull rod and place the first pressure plate, then stack the second pressure plate on the first pressure plate, when stacking the second pressure plate, not only need to pass the second opening through the Inner sleeve, and the closed end of the second slot needs to be axially aligned with one of the first pressure plate through holes on the first pressure plate that has been placed, and one of the second pressure plate through holes needs to be aligned with the already placed The closed ends of the first slots on the placed first pressing plate are axially aligned; such that the first pressing plate and the second pressing plate are stacked axially and radially intersected, on the one hand, one of the pressing plates can be pushed to compress the mutually exclusive For the magnetic ring, by fixing one of the pressure plates, the mutually repulsive magnetic rings are compressed; on the other hand, while keeping one of the pressure plates to compress the mutually exclusive magnetic rings, by removing the first pull rod and the corresponding The pressure plate nut can remove the first pressure plate from the radial direction, so as to keep one pressure plate tightly and repel the magnetic ring while removing the other pressure plate for recycling; similarly, if it is in use, the second pressure plate is located below the first pressure plate When the first pressing plate is kept to press the magnetic rings that repel each other, the second pressing plate can be removed from the radial direction for recycling, so as to keep pressing the magnetic rings that are mutually exclusive and recycle the first The first pressing plate and the second pressing plate improve the flexibility of the assembly device, are more convenient to use, and help to improve work efficiency.

When assembling a large tubular permanent magnet, when manpower or machinery can overcome the magnetic force between the magnetic rings that repel each other, the space between the magnetic rings can be reduced by pressing the pressure plate manually. , the first pressing plate and the second pressing plate pass through the first pull rod and the second pulling rod respectively, and by installing the pressing plate nut on the first pulling rod or the second pulling rod, tighten the nut in the direction of the magnetic ring to push The pressure plate compresses the magnetic rings that repel each other through the screwing of the nuts. Compared with manpower, it does more work on the magnetic rings, and can be used to overcome a large magnetic field force to achieve assembly, so it is more suitable for large tubular multi-pole permanent magnets assembly.

In view of the problem that the assembly scheme in the prior art is easy to damage the magnetic body during the assembly process and cannot be assembled into a large multi-pole permanent magnet, the present invention provides an assembly method for a multi-pole tubular permanent magnet, and uses the multi-pole permanent magnet provided by the present invention An assembly device for a pole tubular permanent magnet, comprising the following steps:

Step 1: fixedly connecting the inner casing and the base;

Step 2: Fit each magnetic ring of the multi-pole tubular permanent magnet axially outside the inner casing one by one, and use the barrier assembly when fitting two adjacent magnetic rings that attract each other, Specifically include the following steps S:

Step S1: placing one of the two magnetic rings that attract each other in the barrier sleeve;

Step S2: bringing the barrier assembly and the magnetic ring in step S1 close to the other magnetic ring in the axial direction at the same time;

Step S3: gradually withdrawing the locking pin in the radial direction, so that two adjacent magnetic rings are close together;

Step S4: removing the barrier sleeve from the magnetic ring;

Step 3: bonding two adjacent magnetic rings of the multi-pole tubular permanent magnet with an adhesive.

In the assembly method of the multi-pole tubular permanent magnet, since each magnetic ring of the multi-pole tubular permanent magnet needs to be arranged adjacent to each other, when assembling two adjacent magnetic rings that attract each other, the barrier assembly is used in combination in step 2 , Without affecting the suit, the two adjacent magnetic rings can be slowly closed, avoiding the collision damage due to the mutual attraction due to the magnetic field force, thus solving the problem that the traditional assembly scheme is easy to damage the magnetic body during the assembly process.

As a preferred solution of the present invention, the third step is replaced by: connecting the inner sleeve nut and bolt to the upper end of the inner sleeve, so that each magnetic ring of the multi-pole tubular permanent magnet is bound to the inner sleeve superior. In this preferred solution, the inner casing nut bolts are used to connect the inner casing, and the inner casing nut bolts with an inner diameter smaller than the outer diameter of the magnetic ring are connected to the end of the inner casing, so that the magnetic ring can not be resisted. Sliding in the axial direction without removing the base, so that each magnetic ring of the multi-pole tubular permanent magnet is fixed on the inner sleeve, so that the multi-pole tubular permanent magnet is relatively firm in shipment and preserved intact , easy to use and conducive to preservation.

As a preferred solution of the present invention, the second step of the assembly method of the multi-pole tubular permanent magnet is to use the pressing assembly when the adjacent magnetic rings that repel each other are set, including step T:

Step T1: fixing one end of the first tie rods to the base, and erecting the first tie rods in a circumferential array on the outside of the inner sleeve;

Step T2: Put the adjacent magnetic rings that repel each other axially outside the inner casing;

Step T3: place the first pressure plate axially above the magnetic ring in step T2, make the first opening pass through the inner sleeve, and make the through hole of the first pressure plate pass through the first pull rod;

Step T4: pushing the first pressing plate to make the mutually repelling magnetic rings close together;

Step T5: Bolt the nuts of the pressure plate to the upper end of the first pull rod respectively; tighten the nuts of the pressure plate so that the first pressure plate compresses the magnetic ring;

Step T6: placing the second pressure plate on the first pressure plate; axially aligning the closed end of the second slot with a through hole of the first pressure plate; aligning a through hole of the second pressure plate axially aligned with the closed end of the first slot;

Step T7: passing the second pull rod through the through hole of the second pressure plate and fixedly connecting it to the base;

Step T8: Bolt the nuts of the pressure plate to the upper end of the second pull rod respectively, tighten the nuts of the pressure plate, so that the second pressure plate presses the first pressure plate;

Step T9: removing the pressure plate nut connected to the first pull rod and the first pull rod; removing the first pressure plate radially outward;

Step T10: When refitting the magnetic rings repelling each other, repeat steps T1 to T4 and remove the second pressing plate for use.

In this preferred solution, when assembling mutually exclusive magnetic rings, by combining the use of the compression assembly in the second step, the magnetic rings that are mutually exclusive are compressed without affecting the set, and the adjacent magnetic rings can be reduced. gap between them, thereby improving the overall performance of the assembled multi-pole permanent magnet; in addition, through step T, while one of them can be kept to press the magnetic ring tube, the other pressing plate can be separately removed along the radial direction of the inner casing, The use steps are more convenient to operate, save manpower, and improve the efficiency of assembly.

In summary, the beneficial effects of the present invention are:

1. The multi-pole tubular permanent magnet of the present invention avoids the problem of easy damage caused by fan-shaped assembly in traditional combined permanent magnets by arranging the magnetic ring and the magnetic ring adjacent to the axial direction. Both the radial and radial directions are covered with magnetic bodies, which enhances the magnetic field strength, thereby improving the overall performance of the multi-pole tubular permanent magnet;

2. The multi-pole tubular permanent magnet of the present invention fills the vacancy of the axial or radial magnetic field intensity vector in the oblique direction by configuring the magnetic ring magnetized obliquely inwardly, so that the magnetic field is denser, thereby achieving the effect of enhancing the magnetic field intensity The purpose is to improve the overall performance of the multi-pole tubular permanent magnet;

3. The assembly device of the multi-pole tubular permanent magnet of the present invention, the inner sleeve plays the role of supporting and limiting the position of the magnetic ring to be assembled, and the barrier assembly is used in conjunction with the inner sleeve, which can The two adjacent magnetic rings are close first and then installed outside the inner casing, or one magnetic ring is first installed outside the inner casing, and then the other magnetic ring is slowly pressed against the inner casing with a barrier assembly The outer magnetic ring can achieve the effect of blocking and slowly closing, avoiding the collision damage caused by the magnetic field force that makes the two magnetic rings that attract each other quickly close together, avoiding the problem of easy damage to the assembled magnetic ring, and greatly reducing the The damage rate of the magnetic ring assembled;

4. The assembly device of the multi-pole tubular permanent magnet is used in conjunction with the inner sleeve and the barrier assembly. The inner sleeve can support and fit a large magnetic ring. Between the two magnetic rings that attract each other, the problem of collision due to large magnetic field force is avoided, and it has the advantage of being suitable for assembling large-scale tubular multi-pole permanent magnets; further, through the combination of compression components, it can overcome a large magnetic field Force action, thereby reducing the interval between the magnetic rings, improving the overall performance of the assembled tubular permanent magnet, and easy to use;

5. The scheme of the assembly method of the multi-pole tubular permanent magnet, through the steps 1 to 3, combined with the use of the inner sleeve, the base, and the barrier assembly, can enable each magnetic ring of the tubular permanent magnet to move along the While axially coaxial and sequentially adjacent to each other, the assembled magnetic rings are more closely adjacent to each other, improving the overall performance of the multi-pole tubular permanent magnet; When two magnetic rings are connected, two adjacent magnetic rings can be slowly closed, avoiding collision damage caused by mutual attraction due to magnetic field force, solving the problem that the traditional assembly scheme is easy to damage the magnetic body during the assembly process, and has the ability to reduce the damage of the assembly permanent magnet The effect of the efficiency; further cooperate with the use of compression components, by assembling mutually repelling magnetic rings, without affecting the suit, compressing the mutually repelling magnetic rings can further reduce the gap between adjacent magnetic rings, thereby The overall performance of the assembled multi-pole permanent magnet is improved, the assembly step saves manpower, and a large permanent magnet can be assembled.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram a of the multipole tubular permanent magnet of the present invention;

Fig. 2 is the sectional view along A-A line in Fig. 1 of the present invention;

Fig. 3 is a schematic diagram b of a three-dimensional structure of a multipole tubular permanent magnet according to the present invention;

Fig. 4 is the sectional view along A-A line in Fig. 3 of the present invention;

Fig. 5 is a schematic cross-sectional view a of the multi-pole tubular permanent magnet assembly device in use according to the present invention;

Fig. 6 is a three-dimensional structural schematic diagram of the barrier assembly of the present invention;

Fig. 7 is a schematic cross-sectional view b of the multi-pole tubular permanent magnet assembly device in use according to the present invention;

Fig. 8 is a top view a of the first pressing plate of the present invention;

Fig. 9 is a top view a of the second pressing plate of the present invention;

Fig. 10 is a top view b of the first pressing plate of the present invention;

Fig. 11 is a top view b of the second platen of the present invention;

Fig. 12 is a three-dimensional structural schematic a of the multi-pole tubular permanent magnet assembly device of the present invention;

Fig. 13 is a three-dimensional structural schematic diagram b of the multipole tubular permanent magnet assembly device of the present invention;

Icons: 0-multipole tubular permanent magnet; 100-magnetic ring; 1-magnetic circuit unit; 11-first magnetic ring; 12-second magnetic ring; 13-third magnetic ring; 14-fourth magnetic ring; 15 -Fifth magnetic ring; 16-Sixth magnetic ring; 17-Seventh magnetic ring; 18-Eighth magnetic ring; 2-Inner sleeve; Through hole; 33-multiple locking pins; 34-incline; 4-base; 5-press assembly; 51-first pressure plate; 511-first opening; 512-first slot; a; 514-the first pressure plate through hole b; 515-the first pressure plate through hole c; 516-the first pressure plate through hole d; 52-the second pressure plate; 521-the second opening; 522-the second slot; 523- Second pressure plate through hole e; 524-second pressure plate through hole f; 525-second pressure plate through hole g; 526-second pressure plate through hole h; 53-first pull rod; 54-second pressure plate; 55-pressure plate nut ; 6-inner casing nut; 7-support metal block.

detailed description

Below in conjunction with accompanying drawing, the present invention is described in detail.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example 1

As shown in Figures 1-2, the multipole tubular permanent magnet of the present invention includes a plurality of magnetic circuit units 1 arranged in the axial direction, and each of the magnetic circuit units 1 includes: The first magnetic ring 11, the second magnetic ring 12, the third magnetic ring 13, and the fourth magnetic ring 14 arranged adjacently; the first magnetic ring 11 is magnetized radially inward; the second magnetic ring 12 is magnetized axially The magnetization direction of the third magnetic ring 13 is opposite to the magnetization direction of the first magnetic ring 11; the magnetization direction of the fourth magnetic ring 14 is opposite to the magnetization direction of the second magnetic ring 12; The inner ring diameters of a magnetic ring 11, the second magnetic ring 12, the third magnetic ring 13 and the fourth magnetic ring 14 are all the same; the first magnetic ring 11, the second magnetic ring 12 , The diameters of the outer rings of the third magnetic ring 13 and the fourth magnetic ring 14 are the same.

The axial direction is understood to be the axial direction of the first magnetic ring 11 , and is also understood to be the axial direction of the assembled multi-pole tubular permanent magnet 0 of the present invention. The magnetic ring is a ring-shaped magnetic body, and the closed ring-shaped magnetic body generates a magnetic field around the magnet, including the inside and outside of the ring, and the direction of the magnetic field strength is different according to the direction of magnetization. The magnetization is understood as the magnetism of the magnetic body itself or the magnetization achieved by magnetization. The permanent magnet can preferably use ferrite, and the magnetization and magnetization can be magnetized and oriented according to the principle of electromagnetic induction or compression injection molding. The radial inner magnetic ring of the first magnetic ring 11 is understood to mean that the magnetic pole direction of the first magnetic ring 11 is magnetized along its radial direction and pointing to the inner ring direction when the first magnetic ring 11 is magnetized, that is, in the direction of the first magnetic ring 11 The direction of the internal magnetic field should be radially pointing to the inner ring, so that a radial inflow (the magnetic field of the magnetic pole N, the magnetic field of the magnetic field formed outside the magnetic circuit unit 1) is generated on the side surface of the first magnetic ring 11. The lines are shown as dotted lines X and Y in Fig. 2, the X and Y magnetic field line illustrations shown are only for describing the magnetic poles and the limited number of magnetic field lines drawn by simulation, the external of the multi-pole tubular permanent magnet O in the real thing It is covered with a magnetic field, and there are actually countless magnetic field lines around it.

The multi-pole tubular permanent magnet 0 of the present invention includes a plurality of magnetic circuit units 1 arranged in the axial direction, and the plurality of magnetic circuit units 1 are circularly arranged in the axial direction to form a multi-polar tubular permanent magnet arranged in the axial direction 0. As shown in Fig. 2, two shown magnetic circuit units 1 are shown in Fig. 2, and actually this multipole tubular permanent magnet 0 configures the number of suitable magnetic circuit units 1 according to needs, just can manufacture the required length Tubular permanent magnets, and the outer diameter of the multipolar tubular permanent magnets O adopts the outer diameter of the magnetic ring according to actual needs, so that multipolar tubular permanent magnets O with different outer diameters can be manufactured.

Preferably, the first magnetic ring 11 and the third magnetic ring 13 are metal magnetic bodies; the second magnetic ring 12 and the fourth magnetic ring 14 are permanent magnets. The metal magnetic body can be, for example, an alloy metal, which can be magnetized to become a magnetic body after being magnetized.

Example 2

On the basis of Embodiment 1, as shown in Figure 3-4, the magnetic circuit unit 1 in the multi-pole tubular permanent magnet 0 of this embodiment also includes: a fifth magnetic ring 15, a sixth magnetic ring 16, a The seventh magnetic ring 17 and the eighth magnetic ring 18; the fifth magnetic ring 15 is disposed between the first magnetic ring 11 and the second magnetic ring 12, and the fifth magnetic ring 15 is magnetized obliquely inward; The sixth magnetic ring 16 is disposed between the second magnetic ring 12 and the third magnetic ring 13, and the magnetization direction of the sixth magnetic ring 16 is along the direction of the magnetization direction of the fifth magnetic ring 15. The direction in which the hour hand rotates by 90°; the seventh magnetic ring 17 is arranged between the third magnetic ring 13 and the fourth magnetic ring 14, and the magnetization direction of the seventh magnetic ring 17 is the same as that of the fifth magnetic ring 17. The magnetization direction of the ring 15 is opposite; the eighth magnetic ring is arranged axially adjacent to the fourth magnetic ring, and the magnetization direction of the eighth magnetic ring 18 is opposite to the magnetization direction of the sixth magnetic ring 16; The inner ring diameters of the fifth magnetic ring 15, the sixth magnetic ring 16, the seventh magnetic ring 17 and the eighth magnetic ring 18 are all the same as the inner ring diameters of the first magnetic ring 11; The diameters of the outer rings of the fifth magnetic ring 15 , the sixth magnetic ring 16 , the seventh magnetic ring 17 and the eighth magnetic ring 18 are the same as that of the first magnetic ring 11 .

The oblique direction refers to an oblique direction that has an included angle with both the axial and radial directions, and the oblique inner direction refers not only obliquely but also to the inner ring, and the included angle with the radially inner direction is an acute angle. Preferably, as shown by the arrow marked on the magnetic ring as shown in FIG. 2 or FIG. 4 , the magnetization direction of the fifth magnetic ring 15 is that of the first magnetic ring 11 rotated 45° clockwise. direction.

As shown in FIG. 4 , by disposing an obliquely inwardly magnetized fifth magnetic ring 15 between the first magnetic ring 11 and the second magnetic ring 12 , the first magnetic ring 11 is a radially inner magnetic ring, and the second magnetic ring 12 is axially magnetized. After the fifth magnetic ring 15 is configured, according to the magnetic field strength vector superposition principle, the magnetic field strength of the fifth magnetic ring 15 fills up the magnetic field strength vector in the oblique direction, making the magnetic field denser and achieving the purpose of enhancing the magnetic field strength. Reasonably, the configurations of the sixth magnetic ring 16, the seventh magnetic ring 17 and the eighth magnetic ring 18 all achieve the purpose of enhancing the strength of the magnetic field, thereby improving the overall performance of the multipolar tubular permanent magnet O.

Preferably, the first magnetic ring 11, the second magnetic ring 12, the third magnetic ring 13, the fourth magnetic ring 14, the fifth magnetic ring 15, and the sixth magnetic ring 16 , the seventh magnetic ring 17 and the eighth magnetic ring 18 are both permanent magnets. Each magnetic ring can be a permanent magnet through injection molding or magnetization.

Example 3

An assembly device for a multipole tubular permanent magnet O, as shown in Figure 5, can be used to assemble the multipole tubular permanent magnet O described in Embodiment 1 or 2, including: an inner sleeve 2, a barrier assembly 3 and The base 4; the materials of the inner sleeve 2 and the barrier assembly 3 are non-magnetic materials; the lower end of the inner sleeve 2 is fixedly connected with the base 4, and the inner sleeve 2 is used for binding The magnetic rings 100 of the multi-pole tubular permanent magnet 0 are arranged axially.

With respect to the multipole tubular permanent magnet 0 to be assembled, the non-magnetic material described in this embodiment is a material that does not have magnetic interaction with the multipole tubular permanent magnet 0 to be assembled.

It should be noted that the multi-pole tubular permanent magnet 0 of the present invention includes the magnetic ring 100 to be assembled before assembly, and the magnetic ring 100 is the multi-pole tubular permanent magnet 0 after assembly. The marking 0 or 100 is only for understanding and application. The number of magnetic rings 100 is selected according to the actual configuration, and the corresponding number of magnetic circuit units 1 can be realized.

As shown in Figure 6, the barrier assembly 3 includes: a barrier sleeve 31, a plurality of sleeve through holes 32, and a plurality of locking pins 33; the inner diameter of the barrier sleeve 31 and the magnetic ring 100 The outer diameter is equivalent; the sleeve through hole 32 is opened on the side wall of the barrier sleeve 31; one end of the locking pin 33 passes through the sleeve through hole 32 and extends to the barrier sleeve 31 Inside, the locking pin 33 extends to the part of the barrier sleeve 31 to support the magnetic ring 100 placed in the barrier sleeve, and the locking pin 33 extends to the part of the barrier sleeve 31. A slope 34 is provided at one end.

It should be noted that the inner diameter of the barrier sleeve 31 is equivalent to the outer diameter of the magnetic ring 100, and the “equal outer diameter” is understood to mean that the outer diameter of the magnetic ring 100 is smaller than that of the barrier sleeve 31. inner diameter, the magnetic ring can be placed in the barrier sleeve 31 .

In this embodiment, the outer diameter of the inner sleeve 2 is smaller than the inner diameter of the multipolar tubular permanent magnet 0 ; the inner diameter of the barrier sleeve 31 is equivalent to the outer diameter of the magnetic ring 100 . The barrier sleeve 31 is tubular, and the diameter or width of the sleeve through hole 32 can allow the locking pin 33 to pass through; when the magnetic ring 100 is placed in the barrier sleeve 31, the The part of the locking pin 33 that extends into the barrier sleeve 31 can be supported on the bottom surface of the magnetic ring 100. Since the inner diameter of the barrier sleeve 31 is greater than the outer diameter of the multi-pole tubular permanent magnet O, One end of the locking pin 33 inserted into the barrier sleeve 31 does not touch the outer wall of the inner sleeve 2 so that the magnetic ring 100 can be sleeved outside the inner sleeve 2 together.

In the process of assembling the multi-pole tubular permanent magnet 0, one or several magnetic rings 100 have been installed on the inner casing, and there is a mutual attraction magnetic force between the other magnetic ring 100 to be installed and the magnetic ring 100 that has been installed. The attractive magnetic field force becomes larger as the distance between the magnetic rings 100 gets closer, and the momentum becomes larger. During assembly, it is easy to quickly close and collide and cause damage. In order to prevent two adjacent magnetic rings 100 from attracting and colliding with each other, a The barrier assembly 3 is used in conjunction with the inner sleeve 2, and the barrier sleeve 31 is placed outside the inner sleeve 2 together with the magnetic ring 100 to be close to the magnetic ring 100 that has been installed on the inner sleeve 2, so that the locking pin 33 extending into the barrier sleeve 31 is blocked between two adjacent magnetic rings 100, and then the locking pin 33 is slowly drawn out radially, and the locking pin 33 is extended into the barrier by setting the One end inside the sleeve tube 31 is a bevel 34. During the process of slowly pulling out the locking pin 33, the position of the bevel 34 supporting the magnetic ring 100 is gradually lowered, and the magnetic ring 100 above is kept as a support barrier and moves slowly and approaches. The following magnetic rings 100 are separated between the two magnetic rings 100 that attract each other, and the distance between the magnetic rings 100 is slowly reduced to be adjacent to each other, thereby avoiding the installation of two adjacent magnetic rings that attract each other. When a magnetic ring 100 is formed, the collision damage occurs due to excessive magnetic force.

In this embodiment, one of the two mutually attracting magnetic rings 100 can also be placed on the platform, the other magnetic ring 100 is placed in the barrier sleeve 31, and the barrier assembly 3 with the magnetic ring 100 is installed Axially close to a magnetic ring 100 that attracts each other, and slowly extract the locking pin 33, so that the distance between a magnetic ring 100 in the barrier sleeve 31 and the magnetic ring 100 to be approached is slowly reduced, so that they are close to each other. Finally, the two adjacent magnetic rings 100 that are close together are set together on the inner sleeve 2 .

With this multi-pole tubular permanent magnet assembly device, through the use of the barrier assembly 3 in conjunction with the inner sleeve 2, through the support and barrier effect of the barrier component 3, the part of the locking pin 33 extending into the barrier sleeve 31 can be isolated Standing between two magnetic rings 100 that attract each other with a large magnetic field force, the speed at which two adjacent magnetic rings 100 are attracted to each other can be slowed down by slowly pulling out the locking pin 33, thereby avoiding the problem caused by the large magnetic field force. And the problem of collision, and the realization is suitable for assembling large tubular multi-pole permanent magnets.

Preferably, as shown in Figures 7-11, the assembly device of the multi-pole tubular permanent magnet described in this embodiment also includes a pressing assembly 5; the pressing assembly 5 includes: a first pressing plate 51, a second pressing plate 52. The first pull rod 53, the second pull rod 54 and the pressure plate nut 55; the first pressure plate 51 is provided with a first opening 511, a first slot 512 and at least three first pressure plate through holes 513; the second pressure plate 52 is provided with a second opening 521, a second slot 522 and at least three second platen through holes 523;

The width of the first opening 511 is larger than the diameter of the inner casing 2, and the width of the first opening 511 is smaller than the outer diameter of the multipole tubular permanent magnet 0; one end of the first slot 512 is closed, The other end of the first slot 512 communicates with the first opening 511, and the width of the first slot 512 is greater than the outer diameter of the pressure plate nut 55; all the first pressure plate through holes 513 are connected with the The first opening 511 is arranged symmetrically to the center; the first pressure plate through hole 513 is for the first pull rod 53 to pass through;

The width of the second opening 521 is greater than the diameter of the inner casing 2, and the width of the second opening 521 is smaller than the outer diameter of the multipole tubular permanent magnet O; one end of the second slot 522 is closed, The other end of the second slot 522 communicates with the second opening 521, and the width of the second slot 522 is greater than the outer diameter of the pressure plate nut 55; The second opening 521 is arranged symmetrically to the center; the second pressure plate through hole 523 allows the second pull rod 54 to pass through.

One end of the first pull rod 53 and the second pull rod 54 are detachably connected to the base 4; the number of the first pull rod 53 is the same as the number of the first platen through holes 513; The number of the second tie rods 54 is the same as the number of the second pressure plate through holes 523; 53 bolt connection.

In this embodiment, the "at least three first pressure plate through holes 513", as shown in FIG. and the first platen through hole c515; the "at least three second platen through holes 523" as shown in Figure 9 mark the three second platen through holes as the second platen through hole e523, the second platen through hole f524, The second platen through hole g525. The three first pressure plate through holes a513, first pressure plate through holes b514 and first pressure plate through holes c515 are symmetrically arranged around the first opening 511, as shown in FIG. 8, so that one of the first pressure plate The through hole c515 is located on the center line PQ of the first opening 511 to be arranged as three through holes of the first pressure plate symmetrically arranged, and the symmetrically arranged through holes of the first pressure plate make it possible for the first pressure plate 51 to be pushed in use. When pressing the magnetic ring 100, the three pressure plate through holes can be evenly stressed around the inner casing by the guidance or support of the first pull rod 53, so that the pushing of the magnetic ring 100 is more stable. Similarly, as shown in Figure 9 The three second pressure plate through-holes e523, second pressure plate through-holes f524, and second pressure plate through-holes g525 on the second pressure plate 52 can also be arranged symmetrically to achieve the above functions.

Also preferably, as shown in FIG. 10 , the first pressure plate through holes include a first pressure plate through hole a513, a first pressure plate through hole b514, a first pressure plate through hole c515 and a first pressure plate through hole d516, as shown in FIG. 11 As shown, the second pressure plate through holes include the second pressure plate through hole e523, the second pressure plate through hole f524, the second pressure plate through hole g525 and the second pressure plate through hole h526;

It should be noted that, as shown in FIG. 8 and FIG. 9, or as shown in FIG. 10 and FIG. 11, the structure and size of the first pressing plate 51 and the second pressing plate 52 are the same. The placement position of the time is different, and different symbols are used for description for clarity.

It should be noted that the first pull rod 53 correspondingly passes through the through hole 513 of the first pressure plate and acts on the first pressure plate 51, and the second pull rod 54 correspondingly passes through the through hole 523 of the second pressure plate and acts on the second pressure plate 52. The number of the first pull rods 53 is the same as the number of the first pressure plate through holes 513, the number of the second pull rods 54 is the same as the number of the second pressure plate through holes 523, because the first pressure plate 51 The second press plate 52 can be set to have the same structure size, therefore, the specifications of the first press plate through hole 53 and the second press plate through hole 54 can also be set to be the same, therefore, the first pull rod 53 and the second shown second The tie rods 54 can be set as tie rods with the same specification and size, which are marked as the first tie rod 53 and the second tie rod 54 for easy understanding.

In this embodiment, as shown in FIG. 12 and FIG. 13 , the function of the first pressing plate 51 and the second pressing plate 52 is to push the magnetic ring 100 close to each other by the pushing force of manpower or mechanical force. The purpose of the first opening 511 is: the first pressing plate 51 can place the pressing plate on the inner casing 2 in the radial direction or axial direction; the width of the first opening 511 is smaller than that of the multi-pole tubular permanent magnet 0 The outer diameter realizes the purpose that the pressing plate can move axially along the inner sleeve 2 and push the magnetic ring 100 assembled by the multi-pole tubular permanent magnet 0 . The lower end of the first pull rod 53 can be fixed on the base 4, and four first pressure plate through holes a, b, c, and d are preferably set on the first pressure plate 51 to pass through the first pull rod 53, which can Guide the first pressing plate 51 to compress the magnetic ring 100, also play a role in fixing the first pressing plate 51, so that the first pressing plate 51 maintains the state of pressing the magnetic ring 100, similarly, the second pull rod 54 also plays a role The function of the second pressing plate 52 is fixed so that the second pressing plate 52 maintains a state of pressing the magnetic ring 100 .

In this embodiment, as shown in FIG. 13 , it should be noted that in FIG. 13 , for clarity of description, the first pressure plate through hole a513 does not show the state of passing through the first tie rod 53 and connecting the pressure plate nut 55 , the actual assembly is as follows In the state shown in FIG. 13 , the first tie rod 53 is installed in the through hole a513 of the first pressure plate, and the pressure plate nut 55 is installed on the first tie rod 53 . In use, the second pressure plate 52 and the first pressure plate 51 are stacked, and the radial planes are staggered, so that the closed end of the second slot 522 of the second pressure plate 52 and the first pressure plate through hole a513 of the first pressure plate 51 It can share the first tie rod 53 for fixing, so that the closed end of the first slot 512 of the first pressure plate 51 and the second pressure plate through hole f524 of the second pressure plate 52 can share a second tie rod 54 for fixing. This structural arrangement can be realized along the Removing the first pressure plate 51 radially does not affect the state where the second pressure plate 52 above is pressing the magnetic ring 100, or removing the second pressure plate 52 radially does not affect the compression magnetic ring 100 of the first pressure plate 51 above state, so as to realize the removal of one of the pressure plates for recycling. By using the compression assembly 5 in conjunction with the inner sleeve 2, the magnetic ring 100 can be compressed to minimize the gap between the magnetic ring 100 and at the same time, it is convenient to disassemble and compress Components and recycling to improve assembly efficiency.

Example 4

An assembly method of a multi-pole tubular permanent magnet, adopting the assembly device of the multi-pole tubular permanent magnet described in embodiment 3, can assemble the multi-pole tubular permanent magnet described in embodiment 1 or 2, comprising the following steps:

Step 1: fixedly connecting the inner casing 2 and the base 4;

Step 2: Fit each magnetic ring 100 of the multi-pole tubular permanent magnet 0 axially outside the inner casing 2 one by one. When two adjacent magnetic rings 100 attracting each other are installed, the The barrier assembly 3 specifically includes the following steps S:

Step S1: placing one of the two mutually attracting magnetic rings 100 in the barrier sleeve 31;

Step S2: Bring the barrier assembly 3 and the magnetic ring 100 in step S1 close to the other magnetic ring 100 in the axial direction at the same time;

Step S3: gradually withdraw the locking pin 33 in the radial direction, so that two adjacent magnetic rings 100 are close together;

Step S4: remove the barrier sleeve 31 from the magnetic ring 100;

Step 3: bonding two adjacent magnetic rings 100 of the multipolar tubular permanent magnet 0 with an adhesive.

In this embodiment, by fixedly connecting the inner sleeve 2 with the base 4, the base 4 is used to axially support each set of magnetic rings 100, and the inner sleeve 2 cooperates with the base 4 to bind each magnetic ring 100 to be arranged in the axial direction; Through the second step, the magnetic rings 100 of the multi-pole tubular permanent magnet 0 are placed outside the inner casing 2 one by one, and then a multi-polar tubular permanent magnet 0 is formed by bonding each magnetic ring 100 .

Assemble each magnetic ring 100 by means of fitting, since there is a magnetic field force that attracts each other between the magnetic rings 100, when step S in step 2 is used to set the two adjacent magnetic rings 100 that attract each other, as shown in Figure 5 In the use state shown, first set one of the two magnetic rings 100 that attract each other outside the inner sleeve 2, then place the other magnetic ring 100 in the barrier sleeve 31, and put the barrier assembly 3 and the barrier The magnetic ring 100 in the casing 31 is put together to the inner casing 2, and then the locking pin 33 is pulled out in the radial direction, and the blocking effect of the locking pin 33, the two magnetic rings 100 attracting each other are blocked, and then Slowly pull out the locking pin 33, and the part of the locking pin 33 protruding into the barrier sleeve 31 is slowly drawn out, so that two adjacent magnetic rings that attract each other slowly close together, and finally remove the barrier sleeve tube 31, complete the assembly of two adjacent magnetic rings 100 that attract each other.

The installation method described in this embodiment, completes the assembly of the multi-pole tubular permanent magnet O through steps 1 to 3, selects and assembles the corresponding number of magnetic rings according to the needs of actual assembly, and through the implementation of step 2, it is possible to avoid two mutual The attractive magnetic ring 100 is quickly closed due to the action of the magnetic field force during assembly, resulting in damage due to collision, and then through step 3, an adhesive is used to separate the bonding between the magnetic rings to limit the magnetic rings, thereby completing the multi-pole tubular permanent Assembly of magnet 0.

In this embodiment, preferably, as shown in FIG. 7 , in the second step, each magnetic ring 100 of the multi-pole tubular permanent magnet 0 is placed axially before the inner sleeve 2 one by one, and can be installed The supporting metal block 7 supports the tubular permanent magnet 0 outside the inner casing 2, and before cooperating with the step 3 to bond the two adjacent magnetic rings 100, a support can be installed on the upper end of the permanent magnet 0 Metal block 7, then use adhesive to bond between the adjacent magnetic rings 100 and between the metal blocks 7, and finally remove the inner sleeve and base 4, so that the metal block 7 and the assembled tubular permanent magnet 0 forms a whole, the metal block 7 can be arranged in a ring shape, and the metal ring is bonded to the end of the tubular permanent magnet 0, which avoids the wear of the end of the multi-pole tubular permanent magnet 0 and plays the role of protecting the magnetic ring , which is convenient for transportation and storage.

The state shown in Figure 7, Figure 7 is a diagram after being cut along the A-A line in Figure 13 and the inner casing nut 6 is installed, the assembly method of the multi-pole tubular permanent magnet described in this embodiment, preferably, The third step is replaced by: bolting the inner casing nut 7 to the upper end of the inner casing 2 , so that each magnetic ring 100 of the multipolar tubular permanent magnet 0 is bound on the inner casing 2 . The inner casing nut 7 can be a commonly used nut, and it is required to use a nut with an inner diameter smaller than the outer diameter of the magnetic ring 100 and matched with the inner casing 2. The inner casing nut 7 is bolted to the The end of the inner casing can resist the magnetic ring without sliding in the axial direction, and the base 4 at the bottom of the tubular permanent magnet does not need to be dismantled, thereby restricting the assembly of each magnetic ring to be fixed on the inner casing to achieve multi-pole Tubular permanent magnets are relatively firm in shipment, and are kept intact for the purpose of being convenient to use and conducive to preservation.

Preferably, this embodiment can use the compression assembly 5, as shown in Figure 12 and Figure 13 in the use state, in the second step of the assembly method of the multi-pole tubular permanent magnet, when the adjacent magnetic rings repelling each other are set When using the pressing assembly 5, the following step T is also included:

Step T1: Fix one end of the first pull rod 53 to the base 4, and erect the first pull rod 53 on the outer side of the inner sleeve 2 in a circumferential array;

Step T2: Put the mutually repelling adjacent magnetic rings 100 on the outside of the inner sleeve 2 in the axial direction;

Step T3: placing the first pressure plate 51 axially above the magnetic ring 100 in step T2, allowing the first opening 511 to pass through the inner sleeve 2, and allowing the first pressure plate through hole 513 to pass through the first pull rod 53;

Step T4: pushing the first pressing plate 51 to make the mutually repelling magnetic rings 100 close together;

Step T5: Connect the pressure plate nuts 55 to the upper ends of the first pull rods 53 with bolts respectively; tighten the pressure plate nuts 55 so that the first pressure plate 51 compresses the magnetic ring 100;

Step T6: placing the second pressing plate 52 on the first pressing plate 51; aligning the closed end of the second slot 522 axially with one of the through holes 513 of the first pressing plate; The through hole 523 of the second pressure plate is axially aligned with the closed end of the first slot 512;

Step T7: passing the second pull rod 54 through the through hole 523 of the second pressure plate and fixedly connecting it to the base 4;

Step T8: Connect the pressure plate nuts 55 to the upper ends of the second pull rods 54 with bolts respectively, and tighten the pressure plate nuts 55 so that the second pressure plate 52 presses the first pressure plate 51;

Step T9: dismantling the pressure plate nut 55 connected to the first pull rod 53 and the first pull rod 53; dismantling the first pressure plate 51 radially outward;

Step T10: When refitting the mutually repelling magnetic rings 100 again, repeat steps T1 to T4 and then remove the second pressing plate 52 for use.

In this embodiment, by adding the use of the pressing assembly 5, the use state shown in Figure 12, when the two mutually exclusive magnetic rings 100 are to be assembled in step 2, firstly connect the first pull rod 53 on the The side of the inner sleeve 2, the first opening 511 is set outside the inner sleeve 2 through the inner sleeve 2, because the width of the first opening 512 is larger than the outer surface of the inner sleeve 2. smaller than the outer diameter of the magnetic ring 100, by pushing the first pressing plate 51 to the side with the magnetic ring 100 through step T4, the two magnetic rings repelling each other can be made close to each other by means of manpower, and through step T5 The pressure plate nut bolts are connected to the upper end of the first pull rod 53, while fixing the first pressure plate 51, the two mutually repelling magnetic rings 100 can be kept pressed; The repulsed magnetic ring is axially outward, therefore, the purpose of using two pressing plates for recycling occurs.

In this method, through steps T6 to T9, in the state of use shown in FIG. The requirement for angular misalignment is: make the end that closes the second slot 522 axially aligned with the through hole a513 of the first pressure plate, and close the through hole f524 of the second pressure plate with the first slot 512 One end of the first pressing plate is axially aligned; then use the second pull rod 54 to pass through the second pressing plate through hole 524, and also pass through the first slot 512, because the first pressing plate through hole a513 of the first pressing plate 51 has already passed through in step T3 There is a first pull rod 53, but the width of the second slot 522 is greater than the outer diameter of the pressure plate nut 55, therefore, the second slot 522 on the second pressure plate 52 will not be affected by the first pressure plate through the The impact of the pressure plate nut on the hole a513; and then through step T7 to realize fixing the second pressure plate 52 above the first pressure plate 51, and realize that the second pressure plate 52 and the first pressure plate 51 pass through the first pull rod 53 and the first pressure plate 51 respectively. The second pull rod 54 is used as a fixed support, so that while the second pressure plate 52 is pressing the magnetic ring 100, the first pressure plate 51 can be removed along the radial direction of the inner sleeve 2. After the first pressure plate 51 is removed, the pressure plate nut can be tightened conventionally. 55 to make the second pressing plate 52 move down to fill the vacancy after the removal of the first pressing plate 51, so as to keep pressing the magnetic ring 100, the removed first pressing plate 51 can be used again, as in step T10, install again After the first pressing plate 51 is finished, remove the second pressing plate 52 for standby, so as to realize step T6 and use the second pressing plate 52 again, so that the first pressing plate 51 and the second pressing plate 52 respectively press the magnetic ring 100, and can recycle two One pressing plate does not affect the pressing function of each other, which improves the efficiency of assembly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (8)

1. A multi-pole tubular permanent magnet assembly device, characterized in that it includes: an inner sleeve (2), a barrier assembly (3), a pressing assembly (5) and a base (4); the inner sleeve ( 2), the barrier assembly (3) and the base (4) are made of non-magnetic materials; the lower end of the inner sleeve (2) is fixedly connected with the base (4), and the inner sleeve (2) The magnetic rings (100) used to bind the multi-pole tubular permanent magnet (0) are arranged in the axial direction; the barrier assembly (3) includes: a barrier sleeve (31), a plurality of sleeves Through holes (32), a plurality of locking pins (33); the inner diameter of the barrier sleeve (31) is larger than the outer diameter of the magnetic ring (100); the sleeve through holes (32) are set in the The side wall of the barrier sleeve (31); one end of the locking pin (33) passes through the sleeve through hole (32) and extends to the inside of the barrier sleeve (31), the locking pin ( 33) The part extending to the barrier sleeve (31) is used to support the magnetic ring (100) placed in the barrier sleeve (31), and the locking pin (33) extends to the barrier One end of the casing (31) is provided with an inclined surface (34); the pressing assembly (5) includes: a first pressing plate (51), a second pressing plate (52), a first pull rod (53) and a second pull rod (54 ) and a pressure plate nut (55); the first pressure plate (51) is provided with a first opening (511), a first slot (512) and at least three first pressure plate through holes (513); the second pressure plate (52) A second opening (521), a second slot (522) and at least three second pressure plate through holes (523) are opened; the width of the first opening (511) is larger than that of the inner sleeve (2 ), the width of the first opening (511) is smaller than the outer diameter of the multi-pole tubular permanent magnet (0); one end of the first slot (512) is closed, and the first slot (512 ) communicates with the first opening (511), the width of the first slot (512) is greater than the outer diameter of the pressure plate nut (55); all the first pressure plate through holes (513) The first opening (511) is arranged symmetrically to the center; the first pressure plate through hole (513) is passed through by the first pull rod (53); the width of the second opening (521) is larger than that of the inner sleeve The diameter of the tube (2), the width of the second opening (521) is smaller than the outer diameter of the multi-pole tubular permanent magnet (0); one end of the second slot (522) is closed, and the second opening The other end of the groove (522) communicates with the second opening (521), and the width of the second slot (522) is greater than the outer diameter of the pressure plate nut (55); all the second pressure plate through holes ( 523) is arranged symmetrically around the second opening (521); the through hole of the second pressure plate (523) is used for the passage of the second pull rod (54); the first pull rod (53) and the first pull rod (53) One end of the two pull rods (54) is detachably connected to the base (4); the number of the first pull rods (53) is the same as the number of the through holes (513) the same number; the number of the second tie rods (54) is the same as the number of the second pressure plate through holes (523); the number of the pressure plate nuts (55) is the same as the number of the first tie rods (53) match, the pressure plate nut (55) is bolted to the first pull rod (53). 2. A multi-pole tubular permanent magnet, characterized in that, it is assembled by the assembly device as claimed in claim 1, and the multi-pole tubular permanent magnet comprises: a plurality of shafts along the axial direction of the multi-pole tubular permanent magnet The magnetic field circuit of the S-N magnetic pole includes a plurality of magnetic circuit units (1) arranged in the axial direction, and each of the magnetic circuit units (1) includes: a first magnetic ring ( 11), the second magnetic ring (12), the third magnetic ring (13) and the fourth magnetic ring (14); the first magnetic ring (11) is magnetized radially inward; the second magnetic ring (12) Axial magnetization; the magnetization direction of the third magnetic ring (13) is opposite to that of the first magnetic ring (11); the magnetization direction of the fourth magnetic ring (14) is opposite to that of the second magnetic ring The magnetization directions of (12) are opposite; the inner rings of the first magnetic ring (11), the second magnetic ring (12), the third magnetic ring (13) and the fourth magnetic ring (14) The diameters are all the same; the outer ring diameters of the first magnetic ring (11), the second magnetic ring (12), the third magnetic ring (13) and the fourth magnetic ring (14) are all the same; The magnetic circuit unit (1) also includes: a fifth magnetic ring (15), a sixth magnetic ring (16), a seventh magnetic ring (17) and an eighth magnetic ring (18); the fifth magnetic ring ( 15) Arranged between the first magnetic ring (11) and the second magnetic ring (12), the fifth magnetic ring (15) is magnetized obliquely inward; the sixth magnetic ring (16) is configured Between the second magnetic ring (12) and the third magnetic ring (13), the magnetization direction of the sixth magnetic ring (16) is along the direction of the magnetization of the fifth magnetic ring (15). The direction in which the hour hand rotates 90°; the seventh magnetic ring (17) is arranged between the third magnetic ring (13) and the fourth magnetic ring (14), and the seventh magnetic ring (17) The magnetization direction is opposite to the magnetization direction of the fifth magnetic ring (15); the eighth magnetic ring (18) is arranged axially adjacent to the fourth magnetic ring (14), and the eighth magnetic ring ( The magnetization direction of 18) is opposite to the magnetization direction of the sixth magnetic ring (16); the fifth magnetic ring (15), the sixth magnetic ring (16), the seventh magnetic ring (17) and The diameter of the inner ring of the eighth magnetic ring (18) is the same as that of the first magnetic ring (11); the fifth magnetic ring (15), the sixth magnetic ring (16), Both the outer ring diameters of the seventh magnetic ring (17) and the eighth magnetic ring (18) are the same as the outer ring diameters of the first magnetic ring (11). 3. The multi-pole tubular permanent magnet according to claim 2, characterized in that, the first magnetic ring (11) and the third magnetic ring (13) are metal magnetic bodies or permanent magnets; the second The magnetic ring (12) and the fourth magnetic ring (14) are permanent magnets. 4. The multi-pole tubular permanent magnet according to claim 2, characterized in that, the first magnetic ring (11), the second magnetic ring (12), the third magnetic ring (13), the The fourth magnetic ring (14), the fifth magnetic ring (15), the sixth magnetic ring (16), the seventh magnetic ring (17), and the eighth magnetic ring (18) are Permanent magnets. 5. The multi-pole tubular permanent magnet according to claim 2, characterized in that, the magnetization direction of the fifth magnetic ring (15) is 45° clockwise when the magnetization direction of the first magnetic ring (11) is rotated direction. 6. An assembly method of a multipole tubular permanent magnet, characterized in that, using the assembly device as claimed in claim 1, comprising the following steps: Step 1: fixedly connecting the inner casing (2) and the base (4); Step 2: Fit the magnetic rings (100) of the multi-pole tubular permanent magnet (0) one by one axially outside the inner sleeve (2), wherein the adjacent two magnetic rings (100) that are attracted to each other When the magnetic ring (100) is used, the barrier assembly (3) is used, which specifically includes the following step S: Step S1: placing one of the two mutually attracting magnetic rings (100) in the barrier sleeve (31); Step S2: bringing the barrier assembly (3) and the magnetic ring (100) in step S1 close to the other magnetic ring (100) in the axial direction at the same time; Step S3: gradually withdrawing the locking pin (33) in the radial direction, so that two adjacent magnetic rings (100) are close together; Step S4: removing the barrier sleeve (31) from the magnetic ring (100); Step 3: bonding two adjacent magnetic rings (100) of the multi-pole tubular permanent magnet with an adhesive. 7. The assembly method of the multi-pole tubular permanent magnet according to claim 6, characterized in that the step 3 is replaced by: bolting the inner casing nut (7) to the upper end of the inner casing (2) , so that each magnetic ring (100) of the multi-pole tubular permanent magnet is bound on the inner casing (2). 8. The method for assembling a multi-pole tubular permanent magnet according to claim 6 or 7, characterized in that, in said step 2, when the adjacent magnetic rings repelling each other are set, the pressing assembly (5 ), also includes step T: Step T1: fixing one end of the first pull rod (53) to the base (4), erecting the first pull rod (53) in a circumferential array on the outside of the inner sleeve (2); Step T2: sleeve the adjacent magnetic rings (100) that repel each other outside the inner sleeve (2) in the axial direction; Step T3: place the first pressure plate (51) axially above the magnetic ring (100) in step T2, make the first opening (511) pass through the inner sleeve (2), and make the The through hole (513) of the first pressure plate passes through the first pull rod (53); Step T4: Pushing the first pressing plate (51) to make the mutually repelling magnetic rings (100) close together; Step T5: Bolt the pressure plate nuts (55) to the upper end of the first tie rod (53); tighten the pressure plate nuts (55) so that the first pressure plate (51) compresses the magnetic ring (100); Step T6: place the second pressure plate (52) on the first pressure plate (51); align the closed end of the second slot (522) with a through hole (513) of the first pressure plate alignment; align one of the second platen through holes (523) with the closed end of the first slot (512) axially; Step T7: passing the second pull rod (54) through the through hole (523) of the second pressure plate and fixedly connecting it to the base (4); Step T8: Bolt the pressure plate nuts (55) to the upper ends of the second tie rods (54), tighten the pressure plate nuts (55), so that the second pressure plate (52) presses the first Press plate (51); Step T9: removing the pressure plate nut (55) connected to the first pull rod (53) and the first pull rod (53); removing the first pressure plate (51) radially outward; Step T10: When refitting the magnetic rings (100) repelling each other, repeat steps T1 to T4 and then remove the second pressing plate (52) for use.

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