CN219164421U - Nutation salient pole magnetic speed reducer with large transmission ratio - Google Patents
Nutation salient pole magnetic speed reducer with large transmission ratio Download PDFInfo
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- CN219164421U CN219164421U CN202223527206.9U CN202223527206U CN219164421U CN 219164421 U CN219164421 U CN 219164421U CN 202223527206 U CN202223527206 U CN 202223527206U CN 219164421 U CN219164421 U CN 219164421U
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Abstract
The utility model relates to a nutation salient pole magnetic speed reducer with a large transmission ratio, which comprises a box body, wherein a rotating disc is arranged in the box body, an input shaft is penetrated through the left end of the box body, a first salient pole rotor which is sleeved on the input shaft and performs nutation movement along with the rotation of the input shaft is arranged in the middle of the rotating disc, a second salient pole rotor is fixedly connected to the first salient pole rotor, a plurality of first salient poles which are arranged at intervals along the circumferential direction are arranged on the left end surface of the first salient pole rotor, and a first magnetic gear ring which is in magnetic field coupling with the first salient pole rotor is arranged on the inner side of the left end of the box body; the outer periphery of the second salient pole rotor is provided with a plurality of second salient poles which are arranged at intervals along the circumferential direction, and the inner side of the rotating disc is provided with a second magnetic gear ring which is in magnetic field coupling with the second salient pole rotor. The nutation salient pole magnetic speed reducer with large transmission ratio has the advantages of simple structure, large transmission ratio, high transmission efficiency, and the permanent magnet consumption is about half of that of the traditional surface-mounted nutation magnetic speed reducer, and has the advantages of simple structure, large transmission ratio, less permanent magnet consumption and the like.
Description
Technical Field
The utility model relates to the field of reducers, in particular to a nutation salient pole magnetic reducer with a large transmission ratio.
Background
The magnetic transmission technology has the advantages of no friction and abrasion, high transmission efficiency, low vibration noise and the like, and the problems of cold welding and the like can not occur because the components are not contacted. The non-contact lubrication-free characteristic of the mechanical transmission field is widely focused by students, so that the mechanical transmission field has a profound application prospect in deep space exploration and food and medicine. The magnetic transmission technology is divided into two major categories, namely electromagnetism and permanent magnetism according to the magnetic field generation mode, and the permanent magnetism transmission is to utilize magnetism of rare earth permanent magnet materials to carry out power transmission, so that the whole structure is simpler compared with electromagnetic equipment. Although China has rich rare earth mineral products, the permanent magnet rare earth materials are limited all the time, and in order to improve the utilization rate of the permanent magnet materials and reduce the magnetic transmission cost, a novel magnetic speed reducer with small permanent magnet consumption, simple structure and large transmission ratio is provided.
Disclosure of Invention
Therefore, the utility model aims to provide the nutation salient pole magnetic speed reducer with the large transmission ratio, which has the advantages of simple structure, large transmission ratio, high transmission efficiency and small permanent magnet consumption.
The utility model is realized by adopting the following scheme: the utility model provides a big transmission ratio nutation salient pole magnetic force reduction gear, includes the box that is equipped with the rolling disc in inside, the input shaft is worn to be equipped with in the left end of box, has the cover in the middle of the rolling disc and establishes on the input shaft and carry out nutation motion's first salient pole rotor along with the rotation of input shaft, fixedly connected with second salient pole rotor on the first salient pole rotor, first salient pole rotor left end face is equipped with a plurality of first salient poles of circumference interval arrangement, the box left end inboard is equipped with the first magnetism ring gear that carries out magnetic field coupling with first salient pole rotor; the outer periphery of the second salient pole rotor is provided with a plurality of second salient poles which are arranged at intervals along the circumferential direction, and the inner side of the rotating disc is provided with a second magnetic gear ring which is in magnetic field coupling with the second salient pole rotor.
Further, the first magnetic gear ring and the second magnetic gear ring are formed by tightly arranging a plurality of permanent magnets, the number of the magnetic pole pairs of the first magnetic gear ring and the second magnetic gear ring is 9 and 10 respectively, N, S poles are alternately arranged, the number of the first salient poles on the first salient pole rotor is 8, and the number of the second salient poles on the second salient pole rotor is 9.
Further, the input shaft is connected with a nutating sleeve through a key, and the first salient pole rotor is assembled on the nutating sleeve through a bearing.
Further, the box is formed by left box and right box through bolted connection, and left end has the left end cover through bolted connection in left box left end, and right end has the right-hand member cover through bolted connection in right box right-hand member, the input shaft passes through the bearing and rotates with left box to be connected, the rotating disc right-hand member passes through the bearing and rotates with right box to be connected.
Compared with the prior art, the utility model has the following beneficial effects: the nutation salient pole magnetic speed reducer with large transmission ratio has the advantages of simple structure, large transmission ratio and high transmission efficiency, and the dosage of the permanent magnet is about half of that of the traditional surface-mounted nutation magnetic speed reducer.
The present utility model will be further described in detail below with reference to specific embodiments and associated drawings for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
Drawings
FIG. 1 is a perspective view of an embodiment of the present utility model;
FIG. 2 is a schematic view showing the internal construction of an embodiment of the present utility model;
FIG. 3 is a perspective view of an embodiment of the present utility model with the left housing omitted;
FIG. 4 is a perspective view of a first salient pole rotor and a second salient pole rotor of an illustrative embodiment of the present utility model;
the reference numerals in the figures illustrate: 100-box, 110-left box, 120-right box, 130-left end cover, 140-right end cover, 200-input shaft, 300-first salient pole rotor, 310-first salient pole, 400-second salient pole rotor, 410-second salient pole, 500-first magnetic gear ring, 600-second magnetic gear ring, 700-nutation sleeve and 800-rotating disk.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1-4, a nutating salient pole magnetic speed reducer with a large transmission ratio comprises a box body 100 with a rotating disc 800 inside, wherein an input shaft 200 is arranged at the left end of the box body 100 in a penetrating manner, a first salient pole rotor 300 sleeved on the input shaft and performing nutating motion along with the rotation of the input shaft is arranged in the middle of the rotating disc, a second salient pole rotor 400 is fixedly connected to the first salient pole rotor, a plurality of first salient poles 310 which are arranged at intervals along the circumferential direction are arranged on the left end face of the first salient pole rotor, and a first magnetic gear ring 500 which is in magnetic field coupling with the first salient pole rotor is arranged on the inner side of the left end of the box body; the outer periphery of the second salient pole rotor 400 is provided with a plurality of second salient poles 410 which are arranged at intervals along the circumferential direction, and the inner side of the rotating disc is provided with a second magnetic gear ring 600 which is coupled with the second salient pole rotor in a magnetic field; the utility model introduces a salient pole topological rotor structure into a nutation magnetic speed reducer, creatively provides a nutation magnetic speed reducer with surface-mounted permanent magnets coupled with a salient pole topological structure, creatively provides a nutation magnetic speed reducer with a salient pole topological structure by combining a nutation transmission principle and a minimum reluctance principle, and creatively provides the nutation magnetic speed reducer with the salient pole topological structure.
In this embodiment, the first magnetic gear ring and the second magnetic gear ring are each formed by closely arranging a plurality of permanent magnets, the number of magnetic pole pairs of the first magnetic gear ring and the second magnetic gear ring is 9 and 10 respectively, and are alternately arranged by adopting N, S poles, according to an 'N/S' array, one magnetic pole is correspondingly composed of two permanent magnets, the number of the permanent magnets of the corresponding first magnetic gear ring is 18, and the number of the permanent magnets of the second magnetic gear ring is 20; the first salient pole number on the first salient pole rotor is 8, and the second salient pole number on the second salient pole rotor is 9.
In this embodiment, the input shaft is keyed with a nutating sleeve 700 to form the necessary nutating angle to achieve nutating motion; the first salient pole rotor is assembled on the nutating sleeve through a bearing, and a pair of angular contact ball bearings are specifically adopted; the outer periphery of the nutation sleeve is provided with external threads, the left end of the nutation sleeve is provided with a limiting shoulder propping against the left end of the bearing, and the nutation sleeve is also in threaded connection with a fastening nut propping against the right end of the bearing.
In this embodiment, the box is formed by left box 110 and right box 120 through bolted connection, and left end has left end cover 130 through bolted connection, and right box right-hand member has right-hand member 140 through bolted connection, and left box 110 inboard is equipped with the ring channel that is used for installing first magnetism ring gear, the input shaft passes through the bearing and rotates with left box to be connected, the rotor right-hand member passes through the bearing and rotates with right box to be connected, and the rotor has the annular portion that is located second salient pole rotor outlying, and the second magnetism ring gear just sets up in this annular portion inboard, and the right-hand member of rotor still needs to be connected output shaft (not shown in the figure), and the input shaft right-hand member passes through the bearing and rotates with the rotor right-hand member to be connected.
The magnetic gear comprises a magnetic gear ring and a yoke, wherein the magnetic gear ring is attached to the surface of the yoke through a magnetic steel adhesive surface (namely, the first magnetic gear ring is attached to the inner side of the left end of the left box body through the magnetic steel adhesive surface, and the second magnetic gear ring is attached to the inner side of the rotating disc through the magnetic steel adhesive surface), and a working air gap magnetic field is formed between the magnetic gear and the salient pole rotor. The salient pole rotor is made of the same material as the yoke, and magnetic circuits generated by the magnetic gears are changed by utilizing salient poles with different sizes. The left box body is structurally used as a main part of the box body of the speed reducer, the left box body can also be used as a yoke part of a first magnetic gear ring in function, the rotating disc is used as a yoke part of a second magnetic gear ring, namely, the first magnetic gear ring and the left box body form the first magnetic gear, the second magnetic gear ring and the rotating disc form the second magnetic gear, the magnetic gears are rotors of surface-mounted permanent magnets, the salient pole rotors are of a permanent magnet-free rotor topological structure, the first magnetic gear and the box body are fixedly connected to form a fixed magnetic gear, the second magnetic gear is used as an output member of the speed reducer, the magnetic resistance of the yoke is far lower than that of air, the salient pole rotors form uneven magnetic resistance distribution in space, a magnetic circuit always tends to be the minimum magnetic resistance, and the speed reducer is driven by utilizing magnetic resistance torque generated by the minimum magnetic resistance effect.
According to the working method of the nutation salient pole magnetic speed reducer with the large transmission ratio, power is input from an input shaft to drive the input shaft and the nutation sleeve to rotate, a first-stage magnetic gear pair is formed by a first magnetic gear ring and a first salient pole rotor, and the first salient pole rotor rotates around an axis of the first salient pole rotor to form first-stage speed reduction while performing nutation movement; the first salient pole rotor and the second salient pole rotor have the same rotation angular velocity, the second magnetic gear ring and the second salient pole rotor form a second-stage magnetic gear pair, the second magnetic gear ring and the second salient pole rotor are coupled to form a second-stage speed reduction, the power is further reduced in speed and increased in moment after passing through the second-stage magnetic gear pair, and finally the power is output from the right end of the rotating disc.
The unequal air gap formed by the nutation angle is called nutation air gap, and the permanent magnet arrays on the first magnetic gear ring and the second magnetic gear ring form an air gap magnetic field required by magnetic transmission in the nutation air gap. Under the modulation action of unequal air gaps, the first magnetic gear ring (9 pairs of magnetic poles) generates a rich-order harmonic magnetic field on the surface of the first salient pole rotor, wherein the amplitude of the 8-order magnetic field strength is highest; the second magnetic ring gear (10 pairs of poles) generates a predominantly 9-order harmonic magnetic field at the second salient rotor surface.
The number of salient pole blocks on the first salient pole rotor and the second salient pole rotor is determined by a harmonic magnetic field with highest magnetic field intensity, the harmonic magnetic field in an air gap acts on the salient pole rotor, and the magnetic permeability of a yoke is far higher than that of air, so that magnetic induction lines preferentially pass through a yoke material. When the salient pole rotor and the permanent magnet rotor generate a certain offset angle, reluctance torque is generated in the salient pole rotor, so that the rotor is forced to return to a stable state (namely, a minimum reluctance position).
In the nutation salient pole magnetic speed reducer structure, the number of pole pairs of the magnetic gear ring and the number of salient poles of the salient pole rotor are required to meet the requirement (1)
Wherein, the liquid crystal display device comprises a liquid crystal display device,
representing the number of magnetic pole pairs of the magnetic gear ring->
The number of salient poles is represented, and j represents the j-th magnetic gear pair.
The total gear ratio of the reduction gear can be calculated by formula (2),
any of the above-described embodiments of the present utility model disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the utility model, and the numerical values listed above should not limit the protection scope of the utility model.
If the utility model discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.
Any part provided by the utility model can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims (4)
1. A nutation salient pole magnetic speed reducer with large transmission ratio is characterized in that: the rotary disc type magnetic suspension device comprises a box body, wherein an input shaft is arranged at the left end of the box body in a penetrating manner, a first salient pole rotor which is sleeved on the input shaft and performs nutation motion along with the rotation of the input shaft is arranged in the middle of the rotary disc, a second salient pole rotor is fixedly connected to the first salient pole rotor, a plurality of first salient poles which are arranged at intervals along the circumferential direction are arranged on the left end face of the first salient pole rotor, and a first magnetic gear ring which is in magnetic field coupling with the first salient pole rotor is arranged at the inner side of the left end of the box body; the outer periphery of the second salient pole rotor is provided with a plurality of second salient poles which are arranged at intervals along the circumferential direction, and the inner side of the rotating disc is provided with a second magnetic gear ring which is in magnetic field coupling with the second salient pole rotor.
2. The high ratio nutating salient pole magnetic speed reducer of claim 1, wherein: the first magnetic gear ring and the second magnetic gear ring are formed by tightly arranging a plurality of permanent magnets, the number of the magnetic pole pairs of the first magnetic gear ring and the second magnetic gear ring is 9 and 10 respectively, N, S poles are alternately arranged, the number of first salient poles on the first salient pole rotor is 8, and the number of second salient poles on the second salient pole rotor is 9.
3. The high ratio nutating salient pole magnetic speed reducer of claim 1, wherein: the input shaft is connected with a nutating sleeve through a key, and the first salient pole rotor is assembled on the nutating sleeve through a bearing.
4. The high ratio nutating salient pole magnetic speed reducer of claim 1, wherein: the box is formed by left box and right box through bolted connection, and left end has the left end cover through bolted connection in left box left end, and right end has the right-hand member cover through bolted connection in right box right-hand member, the input shaft passes through the bearing and rotates with left box to be connected, the rotor right-hand member passes through the bearing and rotates with right box to be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223527206.9U CN219164421U (en) | 2022-12-29 | 2022-12-29 | Nutation salient pole magnetic speed reducer with large transmission ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223527206.9U CN219164421U (en) | 2022-12-29 | 2022-12-29 | Nutation salient pole magnetic speed reducer with large transmission ratio |
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| Publication Number | Publication Date |
|---|---|
| CN219164421U true CN219164421U (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223527206.9U Active CN219164421U (en) | 2022-12-29 | 2022-12-29 | Nutation salient pole magnetic speed reducer with large transmission ratio |
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| CN (1) | CN219164421U (en) |
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- 2022-12-29 CN CN202223527206.9U patent/CN219164421U/en active Active
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