CN220291853U

CN220291853U - Ultra-thin high-efficiency linear motor

Info

Publication number: CN220291853U
Application number: CN202321851766.1U
Authority: CN
Inventors: 章启策
Original assignee: CHONGQING LINGLONG ELECTRONIC CO LTD
Current assignee: CHONGQING LINGLONG ELECTRONIC CO LTD
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2024-01-02
Anticipated expiration: 2033-07-14

Abstract

The utility model belongs to the technical field of X-direction vibration linear motors, and particularly relates to an ultrathin high-efficiency linear motor, which comprises an upper shell and a lower shell, wherein a space formed by enclosing the upper shell and the lower shell is a motor inner cavity, a vibrator is arranged in the upper shell, at least one group of stator assembly structures are arranged in the X-axis direction in a stator assembly mounting hole, and an FPC (flexible printed circuit) connecting circuit board is fixed on the top plate surface of the lower shell; a group of magnetic steel components are respectively arranged at two side walls of the stator component mounting hole in the Y-axis direction; a group of opposite outer side walls of the vibrator are respectively provided with a spring, the springs are C-shaped, one end of each spring is welded with the outer side wall of the vibrator into a whole through a locating plate a, and the other end of each spring is welded with the upper shell into a whole through a locating plate b. Due to the structure, the utility model improves the driving force, the magnetic field utilization rate and the response speed, and is suitable for thinned and small-volume terminal products.

Description

Ultra-thin high-efficiency linear motor

Technical Field

The utility model belongs to the technical field of X-direction vibration linear motors, and provides an ultrathin high-efficiency linear motor suitable for thinned and small-size terminal products.

Background

The principle of the linear motor is that the electromagnetic force generated by the coil and the iron core interacts with the magnetic force of the magnetic steel to generate driving force, and the magnitude of the driving force determines the upper limit of the performance of the product.

The magnetic circuit structure of the conventional X-direction vibration linear motor mainly has the following cases:

the scheme 1. An air coil is arranged on the lower shell, and two magnetic steels are distributed above the air coil; the disadvantage of this scheme is that the electromagnetic field generated by the coil is low, resulting in small magnetic circuit driving force, and the driving force is the key factor of the product for quick start and driving load, so the quick response capability and the capability for driving large load of this scheme are both poor;

the scheme 2. An air core coil is arranged on the lower shell, and magnetic steel of a HALPACH structure is distributed above the air core coil, and the main difference between the scheme and the scheme 1 is that the magnetic steel structure of the HALPACH structure can make the magnetic field of the magnetic steel with the same volume at a desired position stronger, but the magnetic force in the Z direction is unbalanced, so that the stress of a rotor in the Z direction is unbalanced, the service life of a product is influenced, in addition, the electromagnetic field generated by the optical air core coil is limited, the driving force is improved to some extent compared with the scheme 1, but is smaller, the quick response capability and the capability of driving a large load are also poorer, and the defect of unbalanced Z-direction suction force is brought;

the coil is wound on an I-shaped iron core, the iron core is made of magnetic conductive materials, magnetic steel is distributed on two sides of the iron core, magnetic force lines generated by the coil are guided to two ends of the iron core by the iron core, and the magnetic force lines interact with the magnetic force lines generated by the magnetic steel to generate driving force; compared with the scheme 2, the driving force is improved, but the driving force is improved in a non-optimal way; the scheme only improves the starting time in response time, the stopping time is not controlled, the stopping time is also required to be finished by other damping modes (such as foam, magnetic liquid, damping glue and the like), and the material cost and the process complexity are increased.

The high-driving force quick response linear motor based on electromagnetic damping disclosed in Chinese patent 2022231411128 solves the problems to a certain extent, improves the driving force, improves the magnetic field utilization rate and the response speed. However, during use, the X-direction vibrating linear motor is a vibrating element, mainly providing touch feedback for the end product; the vibration feedback device is used for being installed on terminal products such as mobile phones, watches, flat panels, touch screens, automobiles and the like which need to be subjected to vibration feedback. With the thinning and miniaturization of the end product, the high-driving force quick response linear motor based on electromagnetic damping disclosed in the chinese patent 2022231411128 is not suitable for the thinning and miniaturization of the end product due to its own structure.

Disclosure of Invention

Accordingly, the present utility model is directed to an ultra-thin and efficient linear motor suitable for slim and small-sized end products.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an ultrathin high-efficiency linear motor, which comprises an upper shell and a lower shell, wherein a space formed by encircling the upper shell and the lower shell is a motor inner cavity, vibrator in the last casing sets up the stator module mounting hole on the vibrator, wherein: at least one group of stator assembly structures are arranged in the X-axis direction in the stator assembly mounting holes, and the lower ends of the stator assembly structures are fixed on the top plate surface of the lower shell; the stator assembly structure further comprises a coil, wherein an iron core matched with the coil is arranged in the coil, the coil is wound on the iron core or is fixed into a whole through an adhesive layer formed by glue between the coil and the iron core, and damping copper sheets integrated with the coil are respectively fixed at two ends of the iron core; an iron core installation through hole is formed in the geometric center position of the damping copper sheet, the inner diameter of the iron core installation through hole is matched with the outer diameter of the iron core, and the end face of the iron core is level with the end face of the damping copper sheet; an FPC (flexible printed circuit) connecting circuit board is fixed on the top plate surface of the lower shell, a bonding PAD and two PAD positions are arranged on the FPC connecting circuit board, the two PAD positions are used as external circuit connecting ports, and the bonding PAD and two ends of the coil are welded into a whole to realize electric connection;

two groups of magnetic steel components are respectively arranged at two side walls in the Y-axis direction in the stator component mounting hole, the two groups of magnetic steel components are simultaneously positioned outside two end faces of the iron core, the magnetic steel components also comprise magnetic steels made of two permanent magnets, and the outer end faces of the two magnetic steels are fixed on a magnetic conduction plate made of a magnetic conduction material; the magnetic pole directions of the four magnetic steels positioned outside the two end faces of the iron core are arranged in the same direction; the magnetic conduction plate is fixed on the vibrator;

a group of opposite outer side walls of the vibrator are respectively provided with a spring, the springs are C-shaped, one end of each spring is welded with the outer side wall of the vibrator into a whole through a locating plate a, and the other end of each spring is welded with the upper shell into a whole through a locating plate b.

In order to facilitate mass production of damping copper sheets, iron cores and convenience in assembly, further, in the scheme, the damping copper sheets are manufactured by the following steps: the iron core is connected with the iron core installation through hole into a whole through an interference fit connection and/or an adhesive layer formed by glue.

In order to facilitate the convenience of assembly, in the scheme, the following steps are provided: the end face shape of the iron core and the end face shape of the damping copper sheet are rectangular, and the end face of the corresponding coil is also rectangular.

In order to ensure the stability of the stator assembly structure, further, in the above scheme: the coil and/or the damping copper sheet of the stator assembly structure are/is fixed with the top plate surface of the lower shell into a whole.

In order to ensure the connection stability of the coil and the lower shell, further, in the scheme: the lower part of the coil is fixed with the top plate surface of the lower shell into a whole through an adhesive layer formed by glue.

In order to ensure the stability of the damping copper sheet, further, in the scheme: the damping copper sheet is welded on the top plate surface of the lower shell through laser.

In order to ensure the stability of the magnetic conduction plate, further, in the scheme: the magnetic conduction plate is fixedly connected with the vibrator into a whole through an adhesive layer formed by glue, or the magnetic conduction plate and the vibrator are fixedly connected into a whole through laser welding.

The beneficial effects of the utility model are as follows: the iron core is arranged in the coil, and the coil and the iron core are adhered into a whole, and the magnetic steel assembly is arranged, so that the magnetic field utilization rate is improved, and the driving force is also improved; the two ends of the iron core are respectively provided with a damping copper sheet, and when the magnetic steel moves, the magnetic steel and the damping copper sheets cut magnetic lines of force to provide reverse electromagnetic resistance for the rotor assembly. The electromagnetic damping adopts non-contact type, a certain gap is reserved between the damping copper sheet and the magnetic steel, and when the magnetic steel moves, the magnetic steel and the damping copper sheet are not in physical contact, so that the problems of abrasion, cracking and the like caused by contact are avoided; the electromagnetic damping adopts the copper sheet as damping, the physical properties of the copper sheet are stable, and the performance consistency of the product under various high and low temperature environments is good due to the extremely small change of the performance of the use environment; the damping copper sheet is made of rigid general materials, and the process feasibility is high and the cost is low when the copper sheet is added into the product for damping. The magnetic field utilization rate is improved, the driving force is improved, and meanwhile, the production cost is reduced. The coil component and the magnetic steel polarity are randomly added in the X-axis direction in the stator component mounting hole, so that the product can be made thinner under the precondition of ensuring the performance requirement of the product, and the stator component mounting hole is suitable for thinned and small-sized terminal products. The spring is C-shaped, so that the whole ultrathin high-efficiency linear motor is as short as possible in the X-axis direction, and the whole volume is reduced.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of the structure of the explosive state of the present utility model;

FIG. 2 is a schematic view of the magnetic steel assembly of the present utility model at the upper housing;

FIG. 3 is a schematic diagram of the magnetic circuit structure of the present utility model;

reference numerals: 1. a vibrator; 2. a stator assembly mounting hole; 3. a stator assembly structure; 4. a magnetic steel component; 401. magnetic steel; 402. a magnetic conductive plate; 301. a coil; 302. an iron core; 303. damping copper sheet; 304. an iron core mounting through hole; 5. an upper housing; 6. a lower housing; 7. the FPC is connected with the circuit board; 8. a spring; 9. a positioning sheet a; 10. and a positioning sheet b.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

As shown in fig. 1-3, the ultra-thin high-efficiency linear motor of the present utility model comprises an upper housing 5 and a lower housing 6, wherein a space formed by enclosing the upper housing 5 and the lower housing 6 is a motor inner cavity, a vibrator 1 located in the upper housing 5, and a stator assembly mounting hole 2 arranged on the vibrator 1, wherein: at least one group of stator assembly structures 3 are arranged in the X-axis direction in the stator assembly mounting holes 2, and the lower ends of the stator assembly structures 3 are fixed on the top plate surface of the lower shell 6; the stator assembly structure 3 further comprises a coil 301, wherein an iron core 302 matched with the coil 301 is arranged in the coil 301, the coil 301 is wound on the iron core 302 or is fixed into a whole through an adhesive layer formed by glue between the coil 301 and the iron core 302, and damping copper sheets 303 integrated with the two ends of the iron core 302 are respectively fixed; an iron core installation through hole 304 is formed in the geometric center position of the damping copper sheet 303, the inner diameter of the iron core installation through hole 304 is matched with the outer diameter of the iron core 302, and the end face of the iron core 302 is flush with the end face of the damping copper sheet 303; an FPC connection circuit board 7 is fixed on the top board surface of the lower housing 6, a bonding PAD and two PAD positions are arranged on the FPC connection circuit board 7, the two PAD positions are used as external circuit connection ports, and the bonding PAD and two ends of the coil 301 are welded into a whole to realize electrical connection;

a group of magnetic steel components 4 are respectively arranged at two side walls of the stator component mounting hole 2 in the Y-axis direction, the two groups of magnetic steel components 4 are simultaneously positioned outside two end faces of the iron core 302, the magnetic steel components 4 comprise two pieces of magnetic steel 401 made of permanent magnets, and the outer end faces of the two pieces of magnetic steel 401 are fixed on a magnetic conduction plate 402 made of a magnetic conduction material; the magnetic pole directions of the four magnetic steels 401 positioned outside the two end surfaces of the iron core 302 are arranged in the same direction; the magnetic conductive plate 402 is fixed on the vibrator 1;

a group of opposite outer side walls of the vibrator 1 are respectively provided with a spring 8, the springs 8 are C-shaped, one end of each spring 8 is welded with the outer side wall of the vibrator 1 into a whole through a locating piece a9, and the other end of each spring 8 is welded with the upper shell 5 into a whole through a locating piece b 10. In this embodiment, the structure is a core magnetic circuit of a linear motor, when current is supplied to the coil, the coil generates a reinforced magnetic field through the iron core, the magnetic field can be effectively converged at the end part of the iron core through the iron core, the magnetic steel is opposite to the end part of the iron core and is a magnetic steel of a rotor assembly, the polarities of the magnetic steel are exactly one and are attracted to the iron core, one and the iron core repel each other, so that the stress directions of the two magnetic steels are the same, the polarities of the magnetic steel at the other end of the iron core are the same, so that the stress directions of all the magnetic steels are in one direction, and the formed total force drives the rotor assembly structure 3 to be 4 times of the stress of the magnetic steel 401 and to displace in one direction; when the directions of the currents are opposite, the directions of the generated electromagnetic fields are opposite, the forces applied to the 4 magnetic fields are opposite, the total force is opposite to the directions, and the formed total force drives the rotor assembly structure 3 to be in opposite directions; the current direction is repeatedly switched in this way, so that the rotor component makes reciprocating motion under the action of driving force. The magnetic steel component 4 and the vibrator 1 are integrated to form an electromagnetic field generated by a rotor component structure, so that the overall performance index of the linear motor is directly determined; the greater the driving force, the faster the response speed, the greater the vibration amount, the greater the damping that can be added, the greater the damping, and the faster the stop time of the motor. The coil 301 of the stator assembly structure 3 is a source for generating electromagnetic force, when an external circuit supplies current to the coil, the coil generates electromagnetic field, and the electromagnetic field generated by the coil interacts with the magnetic field of the magnetic steel to generate driving force; the iron core 302 of the stator assembly structure 3 is made of magnetic conductive material, and is arranged in the center of the coil 301, and the electrified coil 301 with the iron core 302 can greatly lift the magnetic field, so that the driving force of the motor is lifted; when the magnetic steel 401 moves, the damping copper sheet 303 of the stator assembly structure 3 cuts magnetic force lines with the magnetic steel 401 and the damping copper sheet 303 to produce resistance opposite to the moving direction of the rotor assembly structure integrally formed by the magnetic steel assembly 4 and the vibrator 1.

In order to facilitate mass production of damping copper sheets, iron cores and convenience in assembly, further, in the scheme, the damping copper sheets are manufactured by the following steps: the iron core 302 and the iron core mounting through hole 304 are connected into a whole through an interference fit connection and/or an adhesive layer formed by glue.

In order to facilitate the convenience of assembly, in the scheme, the following steps are provided: the end face shape of the iron core 302 and the end face shape of the damping copper sheet 303 are both rectangular, and the end face of the corresponding coil 301 is also rectangular.

In order to ensure the stability of the stator assembly structure 3, further, in the above scheme: the coil 301 and/or the damping copper sheet 303 of the stator assembly structure 3 are fixed to the top plate surface of the lower housing 6 as a whole.

In order to ensure the connection stability of the coil and the lower shell, further, in the scheme: the lower part of the coil 301 is fixed with the top plate surface of the lower housing 6 by an adhesive layer formed by glue.

In order to ensure the stability of the damping copper sheet, further, in the scheme: the damping copper sheet 303 is welded to the top plate surface of the lower case 6 by laser.

To ensure the stability of the magnetic conductive plate 402, further, in the above scheme: the magnetic conductive plate 402 is fixedly connected with the vibrator 1 into a whole through an adhesive layer formed by glue, or the magnetic conductive plate 402 and the vibrator 1 are fixed into a whole through laser welding.

In the above embodiment, the component is a commercially available product.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.

Claims

1. The utility model provides an ultra-thin high-efficient linear motor, includes casing (5) and lower casing (6), and this space that goes up casing (5) and lower casing (6) enclose and close formation is motor inner chamber, is located vibrator (1) of last casing (5), stator module mounting hole (2) of setting on vibrator (1), its characterized in that: at least one group of stator assembly structures (3) are arranged in the X-axis direction in the stator assembly mounting holes (2), and the lower ends of the stator assembly structures (3) are fixed on the top plate surface of the lower shell (6); the stator assembly structure (3) further comprises a coil (301), an iron core (302) matched with the coil is arranged in the coil (301), the coil (301) is wound on the iron core (302) or the coil (301) and the iron core (302) are fixed into a whole through an adhesive layer formed by glue, and damping copper sheets (303) integrated with the two ends of the iron core (302) are respectively fixed; an iron core installation through hole (304) is formed in the geometric center position of the damping copper sheet (303), the inner diameter of the iron core installation through hole (304) is matched with the outer diameter of the iron core (302), and the end face of the iron core (302) is flush with the end face of the damping copper sheet ((303)); an FPC (flexible printed circuit) connecting circuit board (7) is fixed on the top plate surface of the lower shell (6), a bonding PAD and two PAD positions are arranged on the FPC connecting circuit board (7), the two PAD positions are used as external circuit connecting ports, and the bonding PAD and two ends of the coil (301) are welded into a whole to realize electric connection;

a group of magnetic steel components (4) are respectively arranged at two side walls of the stator component mounting hole (2) in the Y-axis direction, the two groups of magnetic steel components (4) are simultaneously positioned outside two end faces of the iron core (302), the magnetic steel components (4) further comprise two magnetic steels (401) made of permanent magnets, and the outer end faces of the two magnetic steels (401) are fixed on a magnetic conduction plate (402) made of a magnetic conduction material; the magnetic pole directions of the four magnetic steels (401) positioned outside the two end surfaces of the iron core (302) are arranged in the same direction; the magnetic conduction plate (402) is fixed on the vibrator (1);

a group of opposite outer side walls of the vibrator (1) are respectively provided with a spring (8), the springs (8) are C-shaped, one end of each spring (8) is welded with the outer side wall of the vibrator (1) into a whole through a locating piece a (9), and the other end of each spring (8) is welded with the upper shell (5) into a whole through a locating piece b (10).

2. The ultra-thin high efficiency linear motor of claim 1, wherein: the iron core (302) and the iron core installation through hole (304) are connected into a whole through an interference fit connection and/or an adhesive layer formed by glue.

3. The ultra-thin high efficiency linear motor according to claim 1 or 2, characterized in that: the end face shape of the iron core (302) and the end face shape of the damping copper sheet (303) are rectangular, and the end face of the corresponding coil (301) is also rectangular.

4. The ultra-thin high efficiency linear motor of claim 1, wherein: the coil (301) and/or the damping copper sheet (303) of the stator assembly structure (3) are/is fixed with the top plate surface of the lower shell (6) into a whole.

5. The ultra-thin high efficiency linear motor of claim 4, wherein: the lower part of the coil (301) is fixed with the top plate surface of the lower shell (6) into a whole through an adhesive layer formed by glue.

6. The ultra-thin high efficiency linear motor of claim 4, wherein: the damping copper sheet (303) is welded to the top plate surface of the lower housing (6) by laser.

7. The ultra-thin high efficiency linear motor of claim 1, wherein: the magnetic conduction plate (402) is fixedly connected with the vibrator (1) into a whole through an adhesive layer formed by glue, or the magnetic conduction plate (402) and the vibrator (1) are fixedly connected into a whole through laser welding.