CN213461499U

CN213461499U - Linear motor

Info

Publication number: CN213461499U
Application number: CN202021882849.3U
Authority: CN
Inventors: 史卫领; 郭顺; 翁兆勇
Original assignee: Ruisheng Technology Nanjing Co Ltd
Current assignee: AAC Technologies Holdings Nanjing Co Ltd; Ruisheng Technology Nanjing Co Ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-06-15
Anticipated expiration: 2030-09-01
Also published as: WO2022047938A1

Abstract

The utility model provides a linear motor, which comprises a base, a slide seat, a first slide rail, a second slide rail, a magnetic component and a coil component, wherein the magnetic component and the coil component are opposite to each other and are arranged at intervals; one of the magnetic assembly and the coil assembly is fixed on the base, and the other one is fixed on the sliding seat; the magnetic assembly comprises a magnetic yoke and magnetic steel assemblies fixed on the magnetic yoke, and the magnetic steel assemblies comprise at least two groups which are arranged at intervals; each magnetic steel component comprises a first magnetic steel and two second magnetic steels arranged on two opposite sides of the first magnetic steel at intervals, and the included angle between each second magnetic steel and the corresponding first magnetic steel is 90-180 degrees; the polarity of one side, close to the coil assembly, of two second magnetic steels of the same magnetic steel assembly is the same as the polarity of one side, close to the coil assembly, of the first magnetic steel; the polarities of adjacent two groups of magnetic steel components are arranged in a reverse way. Compared with the prior art, the utility model discloses a linear electric motor thrust density is high, the motion performance is excellent.

Description

Linear motor

[ technical field ] A method for producing a semiconductor device

The utility model relates to a linear electric motor technical field especially relates to a be applied to linear electric motor of portable consumer electronics product.

[ background of the invention ]

With the development of electronic technology, portable consumer electronic products are more and more sought after by people, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices, and the like, generally use linear motors for system feedback, such as incoming call prompt, information prompt, navigation prompt, vibration feedback of game consoles, and the like.

The linear motor of the related art includes that base, lid are located the base forms sliding connection's apron, is fixed in the stator of base and is fixed in the active cell of apron, the stator is including being fixed in the yoke of base and install in the magnet steel of yoke, the magnet steel includes a plurality ofly and follows the linear sliding direction array of apron is arranged, wherein, through single the magnet steel acts as a magnetic pole of stator.

However, in the related art, since one magnetic pole is only formed by a single piece of magnetic steel, and the volume of the magnetic steel is limited, the magnetic field generated by the stator is weak, the interaction force generated between the stator and the mover is small, so that the thrust generated by the mover to the cover plate is limited, and the thrust density of the linear motor is relatively low.

Therefore, there is a need to provide a new linear motor to solve the above technical problems.

[ Utility model ] content

An object of the utility model is to provide a linear electric motor that thrust density is high, motion performance is excellent.

In order to achieve the above object, the present invention provides a linear motor, which includes a base, a slide seat covering the base, a first slide rail fixed to one end of the base close to the slide seat, a second slide rail fixed to the slide seat and forming a sliding connection with the first slide rail, and a magnetic assembly and a coil assembly opposite to each other and arranged at an interval, wherein the magnetic assembly and the coil assembly interact with each other to drive the slide seat to move linearly relative to the base; one of the magnetic assembly and the coil assembly is fixed on the base, and the other one of the magnetic assembly and the coil assembly is fixed on the sliding seat; the magnetic assembly comprises a magnetic yoke fixed on the base or the sliding seat and magnetic steel assemblies fixed on the magnetic yoke, and the magnetic steel assemblies comprise at least two groups which are arranged at intervals; each magnetic steel component comprises a first magnetic steel and two second magnetic steels arranged on two opposite sides of the first magnetic steel at intervals, the second magnetic steels are obliquely arranged relative to the first magnetic steel, and the included angle between each second magnetic steel and the corresponding first magnetic steel is 90-180 degrees; the magnetizing directions of the first magnetic steel and the second magnetic steel of the same magnetic steel component face the coil component, and the polarity of one side, close to the coil component, of the two second magnetic steels is the same as the polarity of one side, close to the coil component, of the first magnetic steel; and the polarities of the adjacent two groups of magnetic steel components are arranged in a reverse way.

Preferably, the magnetic steel component is embedded and fixed inside the magnetic yoke.

Preferably, the magnetic yoke is provided with a through hole part matched with the magnetic steel component; each through-hole portion include first through-hole and interval set up in two second through-holes of the relative both sides of first through-hole, first through-hole reaches the second through-hole all along being on a parallel with slide and perpendicular to the linear motion direction of slide extends, first magnet steel is inserted and is established and be fixed in first through-hole, two the second magnet steel is inserted respectively and is established and be fixed in two the second through-hole.

Preferably, the magnetic yoke and the magnetic steel component are of an integrally formed structure.

Preferably, each magnetic steel assembly further comprises a third magnetic steel fixed to the magnetic yoke, the third magnetic steel is located between the two second magnetic steels and is arranged at intervals with the two second magnetic steels, and the third magnetic steel is opposite to and arranged at intervals with the first magnetic steel; the included angle between the third magnetic steel and the second magnetic steel is 0-90 degrees; the magnetizing direction of the third magnetic steel faces towards the coil assembly, and the polarity of the third magnetic steel close to the coil assembly is the same as the polarity of the first magnetic steel close to the coil assembly.

Preferably, the coil assembly includes an iron core plate, a plurality of iron core comb teeth arranged at intervals and extending from the iron core plate to the magnetic assembly, and a plurality of coils respectively wound around and fixed to the iron core comb teeth, and the iron core plate is fixed to the base or the sliding base.

Preferably, the coil assembly further includes two iron core baffles, the two iron core baffles are bent and extended towards the magnetic assembly respectively from two opposite ends of the iron core plate along the linear motion direction of the sliding seat, and the iron core comb teeth and the coil are located between the two iron core baffles.

Preferably, an orthographic projection of the coil assembly to the magnetic assembly along a linear motion direction perpendicular to the sliding seat completely falls in the magnetic assembly.

Preferably, the coil assembly comprises at least two coil assemblies which are arranged at intervals.

Preferably, the linear motor further includes a reading head and a grating ruler which are opposite to each other and arranged at an interval, one of the reading head and the grating ruler is fixed on the base, and the other is fixed on the sliding base.

Compared with the prior art, the utility model discloses an among the linear electric motor, one among the magnet steel component, one first magnet steel and two the second magnet steel makes up jointly and forms a magnetic pole that is "U" type, through first magnet steel and two the cooperation of second magnet steel sets up, has increased the volume of single magnetic pole effectively for the magnetic field that single magnetic pole produced is stronger, thereby makes magnetic component with produce bigger interact power between the coil pack, improve the thrust to the slide effectively, improve linear electric motor thrust density, make linear electric motor's motion performance more excellent.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic perspective view of a linear motor according to a first embodiment of the present invention;

fig. 2 is an exploded schematic view of a part of a three-dimensional structure of a first embodiment of the linear motor of the present invention;

fig. 3 is a schematic perspective view of a first embodiment of a magnetic assembly according to the present invention;

fig. 4 is an exploded perspective view of a first embodiment of a magnetic assembly according to the present invention;

FIG. 5 is a sectional view taken along line A-A of FIG. 1;

FIG. 6 is a partial enlarged view of the portion indicated by B in FIG. 5;

fig. 7 is a sectional view of a partial structure of a linear motor according to a second embodiment of the present invention.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Implementation mode one

Referring to fig. 1 to 6, the present invention provides a linear motor 100, which includes a base 1, a sliding base 2, a first sliding rail 3, a second sliding rail 4, a magnetic assembly 5, and a coil assembly 6.

The sliding seat 2 is covered on the base 1.

The first slide rail 3 is fixed at one end of the base 1 close to the slide seat 2.

A second slide rail 4 is fixed to the slide carriage 2, and the second slide rail 4 forms a sliding connection with the first slide rail 3, so that the slide carriage 2 can slide relative to the base 1.

The magnetic component 5 and the coil component 6 are opposite to each other and arranged at intervals; one of the magnetic assembly 5 and the coil assembly 6 is fixed on the base 1, and the other is fixed on the sliding seat 2.

It should be noted that the specific locations of the magnetic assembly 5 and the coil assembly 6 are not limited, and the specific locations may be set according to the actual use requirement, for example, in the first embodiment, the magnetic assembly 5 is fixed to the base 1, and the coil assembly 6 is fixed to the sliding base 2.

The magnetic assembly 5 interacts with the coil assembly 6 to drive the carriage 2 in a linear motion relative to the base 1, which is also understood to mean to drive the base 1 in a linear motion relative to the carriage 2. Of course, in other embodiments, the positions of the magnetic assembly 5 and the coil assembly 6 may be interchanged, which is easily conceivable and substantially the same.

In the present embodiment, the magnetic assembly 5 includes a yoke 51 and a plurality of magnetic steels 52 fixed to the yoke 51 and spaced from each other.

The magnetic assembly 5 includes a magnetic yoke 51 fixed to the base 1 and a magnetic steel assembly 52 fixed to the magnetic yoke 51.

The magnetic steel assemblies 52 comprise at least two groups and are arranged at intervals, and the specific number of the magnetic steel assemblies 52 can be specifically set according to the actual use requirement; the polarities of the two adjacent magnetic steel assemblies 52 are opposite, for example, when one of the two adjacent magnetic steel assemblies 52 close to the coil assembly 6 has an N-pole, the other of the two adjacent magnetic steel assemblies 52 close to the coil assembly 6 has an S-pole.

Each magnetic steel component 52 includes a first magnetic steel 521 and two second magnetic steels 522 disposed at two opposite sides of the first magnetic steel 521 at intervals.

In the same magnetic steel assembly 52, the second magnetic steel 522 is obliquely arranged relative to the first magnetic steel 521, and an included angle α between the second magnetic steel 522 and the first magnetic steel 521 is 90 to 180 °, and in essence, one first magnetic steel 521 and two second magnetic steels 522 are combined together to form a "U" -shaped magnetic pole; the magnetizing directions of the first magnetic steel 521 and the second magnetic steel 522 of the same magnetic steel assembly 52 both face the coil assembly 6, and the polarities of one side of the two second magnetic steels 522 close to the coil assembly 6 are the same as the polarities of one side of the first magnetic steel 521 close to the coil assembly 6, for example, when the magnetic pole of the first magnetic steel 521 close to the coil assembly 6 is an N pole, the magnetic poles of the two second magnetic steels 522 close to the coil assembly 6, which are matched with the first magnetic steel 521, are also an N pole, and the magnetic pole of the "U" shape formed by the magnetic steel assembly 52 is an N pole at this time.

The coil assembly 6 includes an iron core plate 61, a plurality of iron core comb teeth 62 extending from the iron core plate 61 to the magnetic assembly 5 at intervals, and a plurality of coils 63 respectively wound around and fixed to the iron core comb teeth 62, wherein the plurality of iron core comb teeth 62 are arranged along the moving direction of the coil assembly 6.

The coil assembly 6 generates a travelling wave magnetic field, and the travelling wave magnetic field interacts with the magnetic field generated by the magnetic assembly 5 to generate thrust, so as to drive the sliding base 2 to perform linear motion relative to the base 1, or drive the base 1 to perform linear motion relative to the sliding base 2.

Preferably, the coil assembly 6 further includes two core baffles 64 extending from opposite ends of the core plate 61 along the linear motion direction of the slide 2 to the magnetic assembly 5, and the core comb teeth 62 and the coil 63 are located between the two core baffles 64, so that the structure effectively prevents a part of the traveling-wave magnetic field from leaking and guides the traveling-wave magnetic field to the magnetic assembly 5, thereby increasing the driving performance.

In order to ensure the sliding reliability of the sliding seat 2, preferably, the orthographic projection of the coil assembly 6 to the magnetic assembly 5 along the linear motion direction perpendicular to the sliding seat 2 completely falls within the range of the magnetic assembly 5, so that the coil assembly 6 and the magnetic assembly 5 are always arranged in a right-to-right manner, the arrangement avoids the reduction of the interaction force between the coil assembly 6 and the magnetic assembly 5 due to the fact that the coil assembly 6 slides out of the range which can be covered by the magnetic assembly 5, and effectively ensures that enough thrust is generated to push the sliding seat 2 to do linear motion.

In the above structure, in the same magnetic steel assembly 52, one first magnetic steel 521 and two second magnetic steels 522 are combined together to form a magnetic pole in a "U" shape, and the first magnetic steel 521 and two second magnetic steels 522 are arranged in a matching manner, so that the volume of a single magnetic pole is effectively increased, and a magnetic field generated by the single magnetic pole is stronger, thereby generating a larger interaction force between the magnetic assembly 5 and the coil assembly 6, effectively improving the thrust on the sliding base 2, improving the thrust density of the linear motor 100, and making the motion performance of the linear motor 100 better.

Preferably, the magnetic steel assembly 52 is embedded and fixed inside the magnetic yoke 51, and the magnetic yoke 51 serves as a magnetic conductive plate structure of the magnetic steel assembly 52, so that magnetic lines of force of the magnetic steel assembly 52 are more preferably concentrated, the magnetic performance of the position where the magnetic assembly 5 is arranged on the magnetic steel assembly 52 is effectively improved, that is, the magnetic field strength of each "U" -shaped magnetic pole is effectively improved, the interaction force between the magnetic assembly 5 and the coil assembly 6 is further improved, and the thrust on the sliding seat 2 is better improved.

Further, the magnetic yoke 51 is provided with a through hole portion 510 matched with the magnetic steel assembly 52.

Each through hole portion 510 includes a first through hole 5101 and two second through holes 5102 disposed at two opposite sides of the first through hole 5101 at intervals, the first through hole 5101 and the second through holes 5102 extend along a direction parallel to the sliding base 2 and perpendicular to the linear motion direction of the sliding base 2, the first magnetic steel 521 is inserted and fixed in the first through hole 5101, and the two second magnetic steels 522 are respectively inserted and fixed in the two second through holes 5102.

Preferably, the magnetic yoke 51 and the magnetic steel assembly 52 are of an integrally formed structure, so that the process of assembling the magnetic yoke 51 and the magnetic steel assembly 52 is omitted, the assembling difficulty is reduced, the assembling efficiency is improved, and meanwhile, the fixing reliability of the magnetic yoke 51 and the magnetic steel assembly 52 is improved.

It should be noted that the number of the coil assemblies 6 includes but is not limited to one, and in other embodiments, in order to further increase the pushing force on the sliding base 2, at least two coil assemblies 6 may be provided, at least two coil assemblies 6 are spaced from each other, and each coil assembly 6 is provided with the magnetic assemblies 5 facing each other and spaced apart from each other.

The linear motor 100 further includes a reading head 7 and a grating ruler 8 which are opposite to each other and are arranged at an interval, one of the reading head 7 and the grating ruler 8 is fixed on the base 1, and the other is fixed on the sliding base 2.

Second embodiment

Fig. 7 is a cross-sectional view of a partial structure of a linear motor according to a second embodiment of the present invention, and fig. 7 is a cross-sectional view of another embodiment derived from the structure shown in fig. 6. The linear motor 100a of the second embodiment is basically the same as the linear motor of the first embodiment, and the same parts of the two are not described again one by one, but the two main differences lie in that a third magnetic steel is added to each magnetic steel component of the second embodiment, and the following develops the specific arrangement of the third magnetic steel of the second embodiment:

in order to further improve the overall magnetic field strength of each magnetic steel assembly 52, preferably, each magnetic steel assembly 52 further includes a third magnetic steel 523 fixed to the yoke 51, and the third magnetic steel 523 is located between the two second magnetic steels 522 and is spaced apart from the two second magnetic steels 522.

In the same magnetic steel assembly 52, the third magnetic steel 523 and the first magnetic steel 521 are opposite to each other and are arranged at intervals; the included angle between the third magnetic steel 523 and the second magnetic steel 522 is 0-90 °, and in essence, a first magnetic steel 521, two second magnetic steels 522 and a third magnetic steel 523 are combined together to form a magnetic pole with an inverted trapezoidal structure, that is, the original "U" shaped magnetic pole is converted into the magnetic pole with the inverted trapezoidal structure by adding the third magnetic steel 523.

The magnetizing direction of the third magnetic steel 523 faces the coil assembly, the polarity of the third magnetic steel 523 close to the coil assembly 6 is the same as the polarity of the first magnetic steel 521 close to the coil assembly, for example, when the magnetic pole of the first magnetic steel 521 close to the coil assembly is an N pole, the magnetic pole of the third magnetic steel 523 close to the coil assembly is also an N pole.

Through the setting of third magnet steel 523, the whole magnetic field intensity of magnetic steel assembly 52 is enhanced more effectively, the interaction force generated between magnetic assembly 5 and the coil assembly is further improved, and the thrust to the sliding seat is improved more effectively.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A linear motor comprises a base, a sliding seat, a first sliding rail, a second sliding rail, a magnetic assembly and a coil assembly, wherein the sliding seat is covered on the base, the first sliding rail is fixed at one end, close to the sliding seat, of the base, the second sliding rail is fixed on the sliding seat and is in sliding connection with the first sliding rail, the magnetic assembly and the coil assembly are opposite to each other and are arranged at intervals, and the magnetic assembly and the coil assembly interact with each other to drive the sliding seat to move linearly relative to the base; the magnetic assembly comprises a magnetic yoke fixed on the base or the sliding seat and magnetic steel assemblies fixed on the magnetic yoke, and the magnetic steel assemblies comprise at least two groups which are arranged at intervals; each magnetic steel component comprises a first magnetic steel and two second magnetic steels arranged on two opposite sides of the first magnetic steel at intervals, the second magnetic steels are obliquely arranged relative to the first magnetic steel, and the included angle between each second magnetic steel and the corresponding first magnetic steel is 90-180 degrees; the magnetizing directions of the first magnetic steel and the second magnetic steel of the same magnetic steel component face the coil component, and the polarity of one side, close to the coil component, of the two second magnetic steels is the same as the polarity of one side, close to the coil component, of the first magnetic steel; and the polarities of the adjacent two groups of magnetic steel components are arranged in a reverse way.

2. The linear motor of claim 1, wherein the magnetic steel assembly is embedded and fixed inside the magnetic yoke.

3. The linear motor of claim 2, wherein the yoke is provided with a through hole portion matching the magnetic steel assembly; each through-hole portion include first through-hole and interval set up in two second through-holes of the relative both sides of first through-hole, first through-hole reaches the second through-hole all along being on a parallel with slide and perpendicular to the linear motion direction of slide extends, first magnet steel is inserted and is established and be fixed in first through-hole, two the second magnet steel is inserted respectively and is established and be fixed in two the second through-hole.

4. The linear motor of claim 3, wherein the yoke is of unitary construction with the magnetic steel assembly.

5. The linear motor of claim 1, wherein each magnetic steel assembly further comprises a third magnetic steel fixed to the yoke, the third magnetic steel being located between and spaced apart from the two second magnetic steels, the third magnetic steel being opposite to and spaced apart from the first magnetic steel; the included angle between the third magnetic steel and the second magnetic steel is 0-90 degrees; the magnetizing direction of the third magnetic steel faces towards the coil assembly, and the polarity of the third magnetic steel close to the coil assembly is the same as the polarity of the first magnetic steel close to the coil assembly.

6. The linear motor according to claim 1, wherein the coil assembly includes an iron core plate, a plurality of iron core comb teeth extending from the iron core plate in the direction of the magnetic assembly and spaced apart from each other, and a plurality of coils wound around the iron core comb teeth, and the iron core plate is fixed to the base or the carriage.

7. The linear motor according to claim 6, wherein the coil assembly further includes two core stops extending from opposite ends of the core plate in a direction of linear movement of the carriage and bent toward the magnetic assembly, respectively, and the core comb and the coil are located between the two core stops.

8. The linear motor of claim 7, wherein an orthographic projection of the coil assembly onto the magnetic assembly in a direction perpendicular to the linear motion of the carriage falls entirely within the magnetic assembly.

9. The linear motor of claim 8, wherein the coil assembly includes at least two and is spaced apart from each other.

10. The linear motor of claim 1, further comprising a reading head and a grating scale disposed opposite and spaced from each other, one of the reading head and the grating scale being fixed to the base, and the other of the reading head and the grating scale being fixed to the carriage.