CN111162656A

CN111162656A - A disk type permanent magnet gear

Info

Publication number: CN111162656A
Application number: CN202010126232.7A
Authority: CN
Inventors: 王之焕; 王仲明
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-05-15
Also published as: WO2021169138A1

Abstract

The invention aims to provide a disc type permanent magnet gear adopting a magnetic coupling structure of face-to-face axial magnetic fields, namely, the disc type permanent magnet gear can obtain stable running and has larger transmission torque under the condition of high-speed rotation under the condition of using less permanent magnets by changing and optimizing the magnetic field structure of the permanent magnets of the existing disc type permanent magnet gear. The structure is that the magnetic fields of each pair of permanent magnets uniformly distributed and embedded on the periphery of a working plane of a disk made of non-magnetic conducting materials are all axial, the polarity directions of the magnetic fields of all the permanent magnets in the disk are the same, and the driving torque is transmitted through the magnetic force of the repulsion of the homopolarity of the magnetic fields of the permanent magnets under the condition that the permanent magnets in the two disks are close to. The structure of double-wheel single-wheel clamping can also be adopted in the transmission of the disc permanent magnet gear, particularly in the variable speed transmission, the large wheel is a single wheel, and the small wheel is a double-wheel structure. Meanwhile, the magnetic gear can be made very thin and small, and can be widely implemented in miniature instruments and meters.

Description

Disc type permanent magnet gear

Technical Field

The invention relates to the field of manufacturing a magnetic transmission gear by using a permanent magnetic material, in particular to a surface transmission disc type permanent magnetic gear with an axial magnetic field direction by using the permanent magnetic material.

Background

The magnetic gear made of permanent magnetic material has a series of advantages such as no contact transmission, no abrasion, no working noise, high transmission efficiency and the like, so the magnetic gear is more and more widely applied to various fields. The existing non-coaxial magnetic transmission mainly has two categories according to the working modes; one type is radial magnetic transmission, and the magnetic transmission is carried out by coupling two cylindrical magnetic gears through radial magnetic fields on the surfaces of the cylinders, and the magnetic transmission of the magnetic gears is difficult to improve the transmission torque because the magnetic coupling area between the two cylinders is too small. The other type is axial magnetic transmission, the working mode of the type is that two disc-shaped permanent magnetic gears perform magnetic transmission through the coupling of axial magnetic fields of disc planes of the disc-shaped permanent magnetic gears, and the conventional magnetic gear for the magnetic transmission has the potential of further increasing the transmitted torque because the magnetic coupling area between the two discs is larger. There are also various specific constructions of such disc-type permanent magnet gears, for example, chinese patent application No. cn201629231862.x, entitled: a disk type permanent magnet gear speed change device. Chinese patent application CN201720009054.3, entitled: a permanent magnet gear transmission for variable speed drive and torque transfer. Chinese patent application CN201910205667.8, entitled: a method for manufacturing a permanent magnet transmission gear. However, because the conventional S-N-S-N arrangement is adopted in the magnetic pole direction of the permanent magnets arranged on the periphery of the disc inner plane of the disc permanent magnet gear, when the disc magnetic gear is in high-speed rotation transmission by the magnetic transmission method of pushing and pulling the permanent magnets, the magnetic field of the permanent magnets on the driving wheel disc rotates at high speed, while the magnetic field of the permanent magnets on the driven wheel disc receives too large change of the magnetic field from the driving wheel, and the magnetic field structure is easy to generate magnetic attenuation under the condition of high-speed transmission, so that the torque transmitted by the magnetic coupling of the axial magnetic field is reduced sharply.

Disclosure of Invention

The invention aims to provide a disc type permanent magnet gear adopting a magnetic coupling structure of face-to-face axial magnetic fields, namely, the disc type permanent magnet gear can obtain stable running and has larger transmission torque under the condition of high-speed rotation under the condition of using less permanent magnets by changing and optimizing the magnetic field structure of the permanent magnets of the existing disc type permanent magnet gear.

The disc type permanent magnet gear is composed of a pair of disc-shaped non-magnetic materials and permanent magnet magnetic gears uniformly embedded on the periphery, the directions of the permanent magnet magnetic fields in the two disc-shaped magnetic gears are all axial, but the magnetic poles of all the permanent magnets on the disc working surface are the same as the magnetic poles of the permanent magnets on the adjacent disc working surface. When the transmission mechanism works, the permanent magnets in the two disks are close to each other, and the transmission torque is transmitted through the magnetic force of the like poles of the magnetic fields of the permanent magnets which repel each other.

Through theoretical analysis and practical tests, the mutual distance between the permanent magnets uniformly distributed on the periphery of the disc-type permanent magnet gear is related to the width of a single permanent magnet in two disc-type magnetic gears participating in transmission, and the distance between the permanent magnets in any one of the two discs is equal to or greater than the width of the single permanent magnet in the other disc.

Meanwhile, according to the working principle of the involute of the mechanical transmission gear, the section shape of the permanent magnet in the disk can be made into a tooth shape so as to realize stable transmission.

Meanwhile, the number of the permanent magnets arranged in the two disks determines the transmission ratio of the group of magnetic gears. The adopted disc base material is non-magnetic in a certain range, and cannot generate any influence on a magnetic field formed by the permanent magnet.

In the case of biaxial parallel transmission, especially variable speed transmission, it is also one of the ways to increase the magnetic transmission torque if possible to increase the area of the magnetic field coupling region by adding double-sided disc magnetic gear transmission. Because the magnetic gear adopting the radial magnetic field is difficult to achieve the aim from the viewpoint of the magnetic gear structure, the disc magnetic gear adopting the axial magnetic field is not preferable by simply increasing the area of the permanent magnet disc, but the disc magnetic gear adopting the axial magnetic field is a feasible strategy of increasing the area of the magnetic coupling area of the magnetic gear by adopting a double-wheel-clamp single-wheel structure.

Through theoretical analysis and actual test, a structure that a double-wheel clamping single wheel is adopted in the transmission of the disc permanent magnet gear can be adopted, and particularly, a structural form that a large wheel is a single wheel and a small wheel is double wheels in variable-speed transmission can be adopted.

The permanent magnet processing mode in the disc type permanent magnet gear can be implemented by adopting an embedding processing mode or a sectional magnetizing processing mode.

Compared with the prior magnetic gear structure in which permanent magnet magnets are arranged in a P-N-P-N manner in a disc, the magnetic gear transmission mode based on the disc type permanent magnet gear structure has the advantages that: under the same basic conditions, the disk type magnetic gear can obtain the same transmission torque by only using half of the permanent magnets. The present invention features that permanent magnets are embedded or embedded in non-magnetic material and all the permanent magnets operate with the same polarity repelling force, so that the torque transmission is maintained in high speed rotation. The invention is characterized in that the repulsive force of the surface magnetic field can be fully utilized to transmit torque, so that the magnetic gear can be made very thin and very small and can be widely implemented in miniature instruments and meters.

Drawings

The invention is further described with reference to the following figures and specific examples.

Fig. 1 is a basic structure of a disc type permanent magnet gear single wheel designed according to the invention.

Fig. 2 shows the basic transmission mode of a disc type permanent magnet gear designed according to the invention.

Fig. 3 shows a double-wheel clamping single-wheel transmission mode of a disk type permanent magnet gear designed according to the invention.

In the attached figure 1, 1-a transmission shaft of a disc type permanent magnet gear, 2-a gear base disc made of a non-magnetic-conductive material of the disc type magnetic gear, and 3-a plurality of permanent magnets which are uniformly distributed and embedded in the base disc.

In the attached figure 2, 4-A wheel gear base disc made of non-magnetic material, 5-a plurality of permanent magnets which are uniformly distributed and embedded in the A wheel base disc. 6-a gear base disc made of non-magnetic material of the B wheel and 7-a plurality of permanent magnets which are uniformly distributed and embedded in the gear base disc of the B wheel.

In the attached figure 3, 8-a single-wheel gear base plate, 9-a single-wheel transmission shaft, 10-a plurality of permanent magnets which are uniformly distributed and embedded in the single-wheel base plate, 11-a plurality of permanent magnets which are uniformly distributed and embedded in a double-wheel left-wheel base plate, 12-a double-wheel transmission shaft, 13-a double-wheel left-wheel base plate, 14-a plurality of permanent magnets which are uniformly distributed and embedded in a double-wheel right-wheel base plate, and 15-a double-wheel right-wheel base plate.

The non-magnetic material for manufacturing the gear base plate, such as various nonferrous metals and alloys, various organic or inorganic materials with certain strength, can not generate any influence on the magnetic field of the permanent magnet.

The permanent magnet can be arranged at a preset position by a method of embedding or inlaying the permanent magnet, and the preset position of the base material can be filled with magnetic fillers, wherein the magnetic fillers can be metal magnetic powder, iron-cobalt powder, iron-nickel powder, iron-barium powder and the like, and the axial magnetization is carried out after the setting.

Detailed Description

The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. Any modification of the structure, change of the ratio or adjustment of the size of the structure should still fall within the scope of the present disclosure without affecting the function and the purpose of the present disclosure.

Meanwhile, in the description of the present invention, it should be noted that the terms "upper" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships which are conventionally placed when the product of the present invention is used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or the element to which the present invention is directed must have a specific orientation, be constructed in a specific orientation and be operated, and thus, cannot be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In order to clearly illustrate the technical features of the manufacturing method of the present invention, the present invention is described in detail by the following embodiments in combination with the accompanying drawings. While descriptions of well-known components and specific techniques are omitted so as to not unnecessarily limit the invention.

As shown in fig. 1, the basic structure of a disc-type permanent magnet gear single wheel of the invention is schematically shown. The basic structure of the disc type magnetic gear is mainly formed by combining the following components; the transmission shaft 1 of the disk type permanent magnet gear comprises a gear base disk 2 made of a non-magnetic material and a plurality of permanent magnets 3 which are uniformly distributed and embedded in the base disk, wherein the magnetic field direction of each permanent magnet 3 is axial, and the magnetic pole directions of all the permanent magnets point to one surface uniformly.

As shown in fig. 2, the basic transmission mode is composed of two disk type permanent magnet gears a and B with the same structure, the gear a is composed of a gear base disk 4 made of non-magnetic conducting material and a plurality of permanent magnets 5 embedded in the gear base disk 4 and evenly distributed, the gear B is composed of a gear base disk 6 made of non-magnetic conducting material and a plurality of permanent magnets 7 embedded in the gear base disk and evenly distributed, through the approach of the working surfaces of the side surfaces of the two wheels, the polarities of the permanent magnets embedded in the two wheels are the same and close to form a repulsive force magnetic coupling area, the gear a is assumed as a driving wheel, and when the gear a rotates, the driving wheel B is driven to rotate through the repulsive force magnetic coupling.

As shown in fig. 3, the variable speed transmission structure of a disk type permanent magnet gear comprises a large single wheel 8 and a transmission shaft 9 of the disk type magnetic gear set, a plurality of permanent magnets 10 which are uniformly arranged and embedded in a base disc of the wheel 8, a small double-wheel left wheel base disc 13, a plurality of permanent magnets 11 which are uniformly arranged and embedded in a double-wheel left wheel base disc 13, a small double-wheel transmission shaft 12, a plurality of permanent magnets 14 which are uniformly arranged and embedded in a double-wheel right wheel base disc 15, and the like. When the double-wheel rotating mechanism works, the single wheel 8 is assumed to be a driving wheel, when the single wheel rotates, the left working surface and the right working surface of the wheel 8 are simultaneously close to the right working surface of the double-wheel left wheel 13 and the left working surface of the double-wheel right wheel 15, and the double wheels are driven to rotate under the pushing of a repulsive force magnetic coupling area formed by homopolarity of permanent magnets embedded in the wheel discs. Because the magnetic force of the two surfaces of the permanent magnet embedded in the large single wheel 8 is applied, larger transmission torque can be obtained.

The application examples described above are not limited to the disk-type parallel-axis permanent magnet gear, but also include a planetary magnetic gear transmission form, and magnetic racks and the like can perform other face-to-face magnetic transmission forms. The scheme of the invention is applied to supporting high-speed rotation and has better transmission effect.

The foregoing is a further detailed description of the invention with reference to specific preferred embodiments, and several equivalent substitutes or obvious modifications, all of which are within the scope of the invention as determined by the appended claims, and all equivalents in performance or use, are deemed to be within the scope of the invention as defined by the claims as issued.

Claims

1. A disc-shaped permanent magnet gear, which is composed of a pair of disc-shaped non-magnetic materials and a permanent magnet magnetic gear inlaid evenly around the periphery. The magnetic field directions of the permanent magnets in the two disc-shaped magnetic gears are all axial. , which is characterized in that the magnetic poles of all the permanent magnets on the working surface of the disc are the same as the magnetic poles of the permanent magnets on the working surface of the adjacent disc.

2. A kind of disk-type permanent magnet gear according to claim 1 is characterized in that: the distance between the permanent magnets is uniformly distributed around the disk-type permanent magnet gear, and the distance between the permanent magnets in the two disk-type magnetic gears participating in the transmission is The width of the permanent magnets is related, and the distance between the permanent magnets in any one of the two discs should be equal to or greater than the width of a single permanent magnet in the other disc.

3 . The method for manufacturing a disk-type permanent magnet gear according to claim 1 , wherein the cross-sectional shape of the permanent magnet in the disk can also be made into a tooth shape. 4 .

4 . The method for manufacturing a disk-type permanent magnet gear according to claim 1 , wherein the number of individuals of the built-in permanent magnets in the two disks determines the transmission ratio of the group of magnetic gears. 5 .

5. The manufacturing method of a disk type permanent magnet gear according to claim 1, characterized in that: the non-magnetic conductive material for making the gear base plate, such as various non-ferrous metals and alloys, has a certain strength of organic or inorganic materials.

6. The manufacturing method of a disk permanent magnet gear according to claim 1, wherein the structure of the double wheel clamping single wheel can be adopted in the transmission of the disk permanent magnet gear, especially in the variable speed transmission The big wheel is a single wheel, and the small wheel is a double wheel structure.

7. The manufacturing method of a disk-type permanent magnet gear according to claim 1, wherein the permanent magnet can be set at a predetermined position by pre-embedding or embedding the permanent magnet, and can also be set at a predetermined position by the method of embedding the permanent magnet in the base material. The predetermined position is filled with magnetic fillers, and the magnetic fillers can be magnetic fillers such as metal magnetic powder, iron-cobalt powder, iron-nickel powder, iron-barium powder, etc., and axial magnetization can be performed after shaping.