WO2022041408A1

WO2022041408A1 - Air-gap adjustable linear electric motor

Info

Publication number: WO2022041408A1
Application number: PCT/CN2020/120963
Authority: WO
Inventors: 丁洪福; 郑高伟; 郭顺
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技（南京）有限公司
Priority date: 2020-08-28
Filing date: 2020-10-14
Publication date: 2022-03-03
Also published as: CN112187008A; CN112187008B

Abstract

An air-gap adjustable linear electric motor (100), which comprises a base (1), a sliding seat (2), a first sliding rail (3), a second sliding rail (4), a stator assembly (5), a mover assembly (6) and an air-gap adjusting assembly (7). The stator assembly (5) and the mover assembly (6) interact to drive the sliding seat (2) to linearly move relative to the base (1). The air-gap adjusting assembly (7) comprises two positioning blocks (71), a first inclined block (72), a second inclined block (73) stacked on the first inclined block (72), and a micrometer (74), wherein the first inclined block (72) is provided with a first guide wall (721); the second inclined block (73) is provided with a second guide wall (731); the positioning blocks (71) are respectively recessed to form a first groove (710) and a second groove (711); the first guide wall (721) is clamped in the first groove (710) and forms a sliding connection with the first groove; the second guide wall (731) is clamped in the second groove (711) and forms a sliding connection with the second groove; and the micrometer (74) drives the first inclined block (72) to move along the first groove (710) so as to drive the second inclined block (73) to move in a movement direction perpendicular to the sliding seat (2), and drives the stator assembly (5) or the mover assembly (6) to move synchronously. An air gap of the air-gap adjustable linear electric motor (100) is convenient to adjust, such that the performance thereof is better.

Description

Adjustable Air Gap Linear Motor

technical field

The invention relates to a vibration motor, in particular to an air gap adjustable linear motor for portable consumer electronic products.

Background technique

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 equipment, etc., linear motors are generally used for system feedback, such as mobile phones. Call prompts, information prompts, navigation prompts, vibration feedback from game consoles, etc.

technical problem

The linear motor of the related art includes a base, a cover plate which is covered on the base and forms a sliding connection, a stator fixed on the base, and a rotor fixed on the cover plate. There is a space air gap (air gap) between them, and the air gap is fixed and cannot be adjusted, so that the thrust and thrust fluctuation of the motor cannot be adjusted. In addition, there may be deviations in the air gap after the motor is assembled, which deviates from the target performance. For example, the air gap The size of the air gap will affect the efficiency of cutting the magnetic field line when the motor starts torque operation: the air gap is too large, which will lead to the decrease of the power factor of the motor, and the air gap is too small to reduce the ventilation performance of the motor, thereby affecting the heat dissipation of the motor and increasing the temperature rise of the motor.

Therefore, it is necessary to provide a new air gap adjustable linear motor to solve the above technical problems.

technical solutions

The purpose of the present invention is to provide a linear motor with adjustable air gap, the size of the air gap can be easily adjusted, and the performance is better.

In order to achieve the above object, the present invention provides an air gap adjustable linear motor, which includes a base, a sliding seat covered on the base, and a first sliding seat fixed on one end of the base close to the sliding seat. a rail, a second sliding rail fixed on the sliding seat and forming a sliding connection with the first sliding rail, a stator assembly fixed on the base, and a mover assembly fixed on the sliding seat, the stator assembly Interacting with the mover assembly to drive the sliding seat to move linearly relative to the base, the air gap adjustable linear motor further includes an air gap for adjusting the air gap between the stator assembly and the mover assembly an air gap adjustment assembly with a size of a gap, the air gap adjustment assembly is fixed on the base and the stator assembly is connected with the base, or the air gap adjustment assembly is fixed on the sliding seat and the The mover assembly is connected with the sliding seat;

The air gap adjustment assembly includes two positioning blocks fixed to the base or the sliding seat and arranged opposite to each other, a first inclined block sandwiched between the two positioning blocks, and a first inclined block sandwiched between the two positioning blocks. between the positioning blocks and stacked on the first inclined block to form a sliding connection with a second inclined block and a screw micrometer connected with the first inclined block, the stator assembly or the mover assembly stacked and fixed on the side of the second inclined block away from the first inclined block; the positioning block and the helical micrometer are fixed on the base or on the sliding seat at the same time;

The side of the first inclined block close to the positioning block is provided with a first guide wall protruding outward, and the side of the second inclined block close to the positioning block is provided with a second guide wall protruding outward wall, the first guide wall is parallel to the plane where the moving direction of the sliding seat is located, and the second guiding wall is perpendicular to the moving direction of the sliding seat;

A first groove matched with the first guide wall and a second groove matched with the second guide wall are respectively recessed on one side of the positioning block close to the first inclined block, and the first guide The wall is clamped in the first groove and forms a sliding connection, and the second guide wall is clamped in the second groove and forms a sliding connection;

The helical micrometer drives the first inclined block to move along the first groove to drive the second inclined block to move along the movement direction perpendicular to the sliding seat, and drives the stator assembly or the The mover components move synchronously.

Preferably, the first inclined block includes a first plane opposite to the second inclined block and a first inclined plane opposite to the first plane, and the second inclined block includes a first inclined block opposite to the first inclined block A second plane opposite to each other and a second inclined plane opposite to the second plane, the second inclined plane and the first inclined plane are arranged in opposite directions and fit with each other to form a sliding connection.

Preferably, the air gap adjusting device further comprises a bracket arranged between the first inclined block and the helical micrometer, the bracket is provided with a through hole passing through the bracket, and the spiral micrometer is fixed extending from the bracket and through the through hole to be fixedly connected with the first inclined block.

Preferably, the air-gap adjustable linear motor further includes a read head and a grating ruler that are opposite to each other and are spaced apart, one of the read head and the grating ruler is fixed on the base, and the other is fixed on the base. the slide.

Preferably, the stator assembly includes a magnetic yoke and a plurality of magnetic steels fixed to the magnetic yoke and spaced apart from each other; the mover assembly includes an iron core plate extending from the iron core plate toward the stator assembly A plurality of iron core comb teeth arranged at intervals from each other and a plurality of coils respectively wound and fixed on the iron core comb teeth.

Preferably, the mover assembly further includes two iron core baffles that are respectively bent and extended toward the stator assembly from opposite ends of the iron core plate along the moving direction of the mover assembly. The core comb teeth and the coil are located between the two iron core baffles.

Preferably, the positioning block and the first groove are arranged parallel to the movement direction of the sliding seat, and the first guide wall is arranged parallel to the movement direction of the sliding seat.

beneficial effect

Compared with the related art, in the air gap adjustable linear motor of the present invention, an air gap adjustment assembly is provided to adjust the size of the air gap between the stator assembly and the mover assembly; the air gap adjustment assembly is fixed on the The base and the stator assembly are connected to the base, or the air gap adjustment assembly is fixed to the sliding seat and the mover assembly is connected to the sliding seat, which includes being fixed to the sliding seat. The base or the sliding seat is separated from two positioning blocks, a first inclined block sandwiched between the two positioning blocks, sandwiched between the two positioning blocks and stacked on the The first inclined block forms a sliding connection with the second inclined block and the helical micrometer connected with the first inclined block, the stator assembly or the mover assembly is stacked and fixed on the second inclined block away from the One side of the first inclined block; the positioning block and the helical micrometer are fixed to the base or to the sliding seat at the same time; the first inclined block is close to one side of the positioning block. The side is provided with a first guide wall protruding outward, the side of the second inclined block close to the positioning block is provided with a second guide wall protruding outward, and the first guide wall is parallel to the sliding block. The plane where the movement direction of the seat is located, the second guide wall is perpendicular to the movement direction of the sliding seat; the side of the positioning block close to the first inclined block is respectively recessed to form a matching surface with the first guide wall. A first groove and a second groove matched with the second guide wall, the first guide wall is clamped in the first groove and forms a sliding connection, and the second guide wall is clamped in the into the second groove and form a sliding connection; the helical micrometer drives the first inclined block to move along the first groove to drive the second inclined block to move along the direction perpendicular to the sliding seat move, and drive the stator assembly or the mover assembly to move synchronously, and finally the size of the air gap between the stator assembly and the mover assembly can be adjusted. The structure is simple, and the adjustment of the air gap is convenient and quick. The air gap adjustable linear motor has better performance.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

Fig. 1 is the three-dimensional structure schematic diagram of the air gap adjustable linear motor of the present invention;

2 is a schematic exploded schematic diagram of a partial three-dimensional structure of the air gap adjustable linear motor of the present invention;

Fig. 3 is a sectional view along line A-A in Fig. 1;

Fig. 4 is the enlarged schematic diagram of B in Fig. 3;

FIG. 5 is a schematic diagram of another embodiment of the present invention.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-4, the present invention provides an adjustable air gap linear motor 100, which includes a base 1, a sliding seat 2, a first sliding rail 3, a second sliding rail 4, a stator assembly 5, a moving Subassembly 6 and air gap adjustment assembly 7 .

The sliding seat 2 is covered on the base 1 and forms a receiving space together.

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

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

The stator assembly 5 is located on the side of the base 1 close to the sliding seat 2 , and the mover assembly 6 is located on the side of the sliding seat 2 close to the base 1 . The stator assembly 5 interacts with the mover assembly 6 to drive the sliding seat 2 to move linearly relative to the base 1 , which can also be understood as driving the base 1 to move relative to the sliding seat 2 . Linear motion. Of course, the positions of the stator assembly 5 and the mover assembly 6 are interchangeable, which is easy to imagine, and they are substantially the same.

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

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

The mover assembly 6 generates a traveling wave magnetic field, and the traveling wave magnetic field interacts with the mover assembly 6 to generate thrust, thereby driving the sliding seat 2 to perform linear motion relative to the base 1, or driving the base 1 performs linear motion relative to the carriage 2 .

More preferably, the mover assembly 6 further includes two iron core blocks which are respectively bent and extended toward the stator assembly 5 from opposite ends of the iron core plate 61 along the moving direction of the mover assembly 6 . The plate 64, the iron core comb teeth 62 and the coil 63 are located between the two iron core baffles 63, this structure effectively prevents the leakage of part of the traveling wave magnetic field, and guides it towards the stator assembly 5 , thereby increasing the driving performance.

The air gap adjustment assembly 7 is used to adjust the value of the air gap size between the stator assembly 5 and the mover assembly 6 . Specifically, the air gap adjusting assembly 7 is fixed to the base 1 and connects the stator assembly 5 to the base.

The air gap adjustment assembly 7 includes two positioning blocks 71 fixed on the side of the base 1 close to the sliding seat 2 and arranged at intervals, a space 70 enclosed by the positioning blocks 71 , and a space 70 located in the space 70 . The first inclined block 72 sandwiched between the two positioning blocks 71 is sandwiched between the two positioning blocks 71 and stacked on the side of the first inclined block 72 close to the stator assembly 5 The second inclined block 73 , the helical micrometer 74 and the bracket 75 connected with the first inclined block 72 . Specifically, the first inclined block 72 and the second inclined block 73 form a sliding connection; the positioning block 71 and the helical micrometer 74 are fixed to the base 1 at the same time. A bracket 75 is disposed between the first inclined block 72 and the helical micrometer 74 , the bracket 75 is provided with a through hole 750 therethrough, and the spiral micrometer 74 is fixed to the bracket 75 and It extends through the through hole 750 to be fixedly connected with the first inclined block 72 .

The stator assembly 5 is stacked and fixed on the side of the second inclined block 73 away from the first inclined block 72 ; the side of the first inclined block 72 close to the positioning block 71 is provided with an outward protrusion. The side of the second inclined block 73 close to the positioning block 71 is provided with a second guide wall 731 protruding outward, and the first guide wall 721 is parallel to the sliding seat 2 The plane where the moving direction of the second guide wall 731 is perpendicular to the moving direction of the sliding seat 2 . The positioning blocks 71 respectively correspond to and cooperate with the first guide wall 721 and the second guide wall 731 to have a first groove formed by the depression of the side of the positioning block 71 close to the first inclined block 72 . 710 and the second groove 711, the first guide wall 721 is clamped in the first groove 710 and forms a sliding connection, the second guide wall 731 is clamped in the second groove 711 and formed Sliding connection, the first inclined block 72 and the positioning block 71 form a sliding connection through the first guide wall 721 and the first groove 710 , the second inclined block 73 and the positioning block 71 pass through The second guide wall 731 and the second groove 711 form a sliding connection perpendicular to the movement direction of the sliding seat 2 . The helical micrometer 74 drives the first inclined block 72 to move along the first groove 710 to drive the second inclined block 73 to move along the movement direction perpendicular to the sliding seat 2, and drives the The stator assembly 5 moves synchronously; finally, the size of the air gap between the stator assembly 5 and the mover assembly 6 can be adjusted. The structure is simple, and the adjustment of the air gap is convenient and quick, so that the performance of the air gap adjustable linear motor 100 of the present invention is improved. better.

Preferably, the first inclined block 72 is spaced from a first plane 722a opposite to the second inclined block 73 and a first inclined plane 722 is opposite to the first plane 722a, and the second inclined block 73 includes a The first inclined block 72 is spaced from a second flat surface 732a opposite to the second flat surface 732a and a second inclined surface 732 opposite to the second flat surface 732a. The second inclined surface 722 and the first inclined surface 732 are arranged in opposite directions and fit each other to form a sliding movement. connect. The positioning block 71 and the first groove 710 are arranged parallel to the movement direction of the sliding seat 2 , and the first guide wall 721 is arranged parallel to the movement direction of the sliding seat 2 . The air-gap adjustable linear motor 100 further includes a read head 8 and a grating ruler 9 that face each other and are spaced apart. One of the read head 8 and the grating ruler 9 is fixed to the base 1 , and the other is fixed to the base 1 . One is fixed to the sliding seat 2 .

The present invention also provides an embodiment. As shown in FIG. 5 , the structure of the air-gap adjustable linear motor 200 is substantially the same as that of the above-mentioned air-gap adjustable linear motor 100 , which will not be repeated here. The differences are: The air gap adjustment assembly 7a is located between the slider 2a and the mover assembly 6a, that is, the air gap adjustment assembly 7a is fixed to the slider 2a and the mover assembly 6a is connected to the slider 2a. connect. The air gap adjusting assembly 7a is consistent with the above structure, and also includes two positioning blocks 71a, a space enclosed by the two positioning blocks 71a, a first inclined block 72a, a second inclined block 73a and a helical micrometer 75a, so The positioning block 71a is fixed on the sliding seat 2a, and the mover assembly 6a is stacked and fixed on the side of the second inclined block 73a away from the first inclined block 72a; the positioning block 71a and the helical micrometer At the same time, the device 75a is fixed to the sliding seat 2a. The helical micrometer 75a drives the first inclined block 71a to move so as to drive the second inclined block 72a to move along the movement direction perpendicular to the sliding seat 2a, and drives the mover assembly 6a to move synchronously. The structure and working principle of the air gap adjusting component 7a are the same as those of the above-mentioned embodiment, and are not repeated here.

The above are only the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these belong to the present invention. scope of protection.

Claims

An air gap adjustable linear motor comprises a base, a sliding seat covered on the base, a first sliding rail fixed on one end of the base close to the sliding seat, a first sliding rail fixed on the sliding seat and a second sliding rail that forms a sliding connection with the first sliding rail, a stator assembly fixed to the base, and a mover assembly fixed to the sliding seat, the stator assembly interacting with the mover assembly to The sliding seat is driven to move linearly relative to the base, and the linear motor with adjustable air gap further includes an air gap for adjusting the size of the air gap between the stator assembly and the mover assembly an adjustment assembly, the air gap adjustment assembly is fixed to the base and the stator assembly is connected to the base, or the air gap adjustment assembly is fixed to the sliding seat and the mover assembly is connected to the base the sliding seat connection;

The air gap adjustment assembly includes two positioning blocks fixed to the base or the sliding seat and arranged opposite to each other, a first inclined block sandwiched between the two positioning blocks, and a first inclined block sandwiched between the two positioning blocks. between the positioning blocks and stacked on the first inclined block to form a sliding connection with a second inclined block and a screw micrometer connected with the first inclined block, the stator assembly or the mover assembly stacked and fixed on the side of the second inclined block away from the first inclined block; the positioning block and the helical micrometer are fixed on the base or on the sliding seat at the same time;

The side of the first inclined block close to the positioning block is provided with a first guide wall protruding outward, and the side of the second inclined block close to the positioning block is provided with a second guide wall protruding outward wall, the first guide wall is parallel to the plane where the moving direction of the sliding seat is located, and the second guiding wall is perpendicular to the moving direction of the sliding seat;

A first groove matched with the first guide wall and a second groove matched with the second guide wall are respectively recessed on one side of the positioning block close to the first inclined block, and the first guide The wall is clamped in the first groove and forms a sliding connection, and the second guide wall is clamped in the second groove and forms a sliding connection;

The helical micrometer drives the first inclined block to move along the first groove to drive the second inclined block to move along the movement direction perpendicular to the sliding seat, and drives the stator assembly or the The mover components move synchronously.
The air gap adjustable linear motor according to claim 1, wherein the first inclined block comprises a first plane opposite to the second inclined block and a first inclined plane opposite to the first plane , the second inclined block includes a second plane opposite to the first inclined block and a second inclined plane opposite to the second plane, the second inclined plane and the first inclined plane are oppositely arranged and mutually Fitted to form a sliding connection.
The air gap adjustable linear motor according to claim 1, wherein the air gap adjustment device further comprises a bracket arranged between the first inclined block and the helical micrometer, the bracket There is a through hole passing through it, and the helical micrometer is fixed on the bracket and extends through the through hole to be fixedly connected with the first inclined block.
The air-gap adjustable linear motor according to claim 1, wherein the air-gap adjustable linear motor further comprises a read head and a grating ruler facing each other and arranged at intervals, the read head and the grating ruler One of them is fixed on the base, and the other is fixed on the sliding seat.
The air-gap adjustable linear motor according to claim 1, wherein the stator assembly comprises a magnetic yoke and a plurality of magnetic steels fixed on the magnetic yoke and spaced apart from each other; the mover assembly comprises an iron core a plate, a plurality of mutually spaced iron core comb teeth extending from the iron core plate in the direction of the stator assembly, and a plurality of coils respectively wound and fixed on the iron core comb teeth.
The air-gap adjustable linear motor according to claim 5, wherein the mover assembly further comprises directions from opposite ends of the iron core plate along the moving direction of the mover assembly to the stator assembly, respectively. Two iron core baffles bent and extended in the direction, the iron core comb teeth and the coil are located between the two iron core baffles.
The air gap adjustable linear motor according to claim 1, wherein the positioning block and the first groove are arranged parallel to the moving direction of the sliding seat, and the first guide wall is parallel to the moving direction of the sliding seat. Set the movement direction of the slider.