CN219833922U

CN219833922U - Linear motor

Info

Publication number: CN219833922U
Application number: CN202320179987.2U
Authority: CN
Inventors: 严佑春
Original assignee: Dongguan Kede Precision Manufacturing Co ltd
Current assignee: Dongguan Kede Precision Manufacturing Co ltd
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-10-13
Anticipated expiration: 2033-02-07

Abstract

The utility model relates to the technical field of motors, in particular to a linear motor, which comprises a bracket, a rotor, a stator and a plurality of elastic pieces, wherein an accommodating space is arranged in the bracket, and the rotor and the stator are respectively arranged in the accommodating space; the number of the two active cells is two, each active cell is connected with the bracket through an elastic piece and is oppositely suspended in the stator, and the stator is fixedly connected with the bracket and drives the two active cells to reciprocate in a staggered way; each rotor is provided with an avoiding structure, a swing limiting piece used for limiting the reciprocating movement amplitude of the two rotors is arranged in the avoiding structure, and the two rotors are pivoted with the support through the swing limiting piece. The stator drives the two movers to reciprocate in a staggered way through the electromagnetic field, the elastic piece is deformed along with the reciprocating movement of the two movers, the swing limiting piece rotates along with the reciprocating movement of the two movers, the amplitude of the reciprocating movement of the two movers is limited, vibration and noise caused by vibration due to overlarge moving amplitude of each mover are prevented, and the working noise of the hair trimmer is lower.

Description

Linear motor

Technical Field

The utility model relates to the technical field of motors, in particular to a linear motor.

Background

The hair trimmer in the market at present mainly realizes hair trimming through the mutual cooperation of a cutter head consisting of two rows of cutter teeth with blades, which are arranged in an overlapping way. One row of the fixed cutters which are in contact with a human body is generally fixed cutters, the other row of the fixed cutters are movable cutters, and the linear motor drives the movable cutters to do high-speed reciprocating motion in the use process.

However, many linear motors in the market are provided with deflection wheels on a traditional rotating motor to convert the motion into linear motion, and friction noise can be generated during working due to the fact that the connection part of the movable knife and the deflection wheels is in rotary connection. The high speed rotation of the rotary motor also generates vibration noise, and the combination of various noises makes the working noise of the hair trimmer larger, and influences the use feeling, so that improvement is needed.

Disclosure of Invention

The utility model aims at overcoming the defect of larger working noise of the hair trimmer in the prior art, and provides a linear motor, wherein an alternating current is connected through a stator to generate an electromagnetic field, the stator drives two movers to reciprocate in a staggered manner through the electromagnetic field, an elastic piece is deformed along with the two movers to reciprocate in a staggered manner, the amplitude of the two movers to reciprocate can be limited, the two movers can be reset conveniently, and a swing limiting piece is rotated along with the two movers to reciprocate in a staggered manner, so that the amplitude of the two movers to reciprocate is further limited, vibration and noise caused by vibration due to overlarge moving amplitude of each mover when the motor works are prevented, the working noise of the hair trimmer is lower, the use feeling is improved, and the hair trimmer is more comfortable.

In order to achieve the above purpose, the linear motor of the present utility model comprises a bracket, a mover, a stator and a plurality of elastic members, wherein a containing space is arranged in the bracket, and the mover and the stator are respectively arranged in the containing space; the number of the active cells is two, each active cell is connected with the bracket through the elastic piece and is oppositely suspended in the stator, and the stator is fixedly connected with the bracket and drives the two active cells to reciprocate in a staggered way; the two movers are arranged at intervals, each of the movers is provided with an avoidance structure, a swing limiting piece used for limiting the reciprocating movement amplitude of the two movers is arranged in the avoidance structure, and the two movers are pivoted with the support through the swing limiting piece.

Preferably, the stator includes an iron core, an insulating support and a coil, the iron core is fixed on the support, the iron core is in a shape like a Chinese character 'shan', the insulating support is fixed on a protruding portion in the middle of the iron core, and the coil is wound on the insulating support.

Preferably, each mover comprises a magnet, a magnetic yoke, a mover support and a connecting support, wherein the magnet is fixed at one end of the magnetic yoke facing the stator, one end of the magnetic yoke facing away from the stator is connected with the mover support, and the connecting support is fixed at two sides of each mover support and is used for being connected with the elastic piece; the polarities of the magnets of the two stators are different.

Preferably, the elastic member includes a plurality of first elastic bodies and a plurality of second elastic bodies, and two ends of each first elastic body are respectively abutted between the outer side of each rotor bracket and the inner side of the bracket; the two ends of each second elastic body are respectively fixed between the outer side of the bracket and the outer side of each connecting bracket.

Preferably, the outer side of each rotor support is provided with an abutting groove corresponding to the first elastic body, the inner side of the support is provided with an abutting convex block corresponding to the first elastic body, one end of the first elastic body is arranged in the abutting groove, and the other end of the first elastic body is sleeved on the abutting convex block.

Preferably, a separation groove is formed at one end of the second elastic body connected with the support, the second elastic body forms a first elastic strip and a second strip-shaped strip through the separation groove, and the first elastic strip and the second strip-shaped strip are respectively connected with the outer sides of the corresponding connecting supports.

Preferably, the support is provided with a positioning piece, the positioning piece penetrates through each avoidance structure, the positioning piece is provided with a rotating shaft, the middle part of the swing limiting piece is provided with a shaft hole rotationally connected with the rotating shaft, two ends of the swing limiting piece are respectively provided with a bolt hole, each magnet yoke is provided with a bolt, and two ends of the swing limiting piece are respectively rotationally connected with the bolts of each magnet yoke through the bolt holes.

Preferably, each magnet comprises a first permanent magnet and a second permanent magnet, the first permanent magnet and the second permanent magnet are distributed along the length direction of the magnetic yoke, the polarities of the adjacent ends of the first permanent magnet and the second permanent magnet are different, and a separation block is arranged between the first permanent magnet and the second permanent magnet.

Preferably, the bracket comprises a front bracket and a rear bracket, wherein the front bracket is fixedly connected with the rear bracket to form a containing space for containing the rotor and the stator; the front support and the rear support are both provided with limiting blocks for fixing the stator.

Preferably, the avoidance structure is an avoidance groove, the rotor is provided with a shaft lever, and the shaft lever is convenient for driving an external movable cutter.

The utility model has the beneficial effects that: the stator is connected with alternating current to generate an electromagnetic field, the stator drives the two movers to reciprocate in a staggered manner through the electromagnetic field, the elastic piece is deformed along with the reciprocating movement of the two movers in a staggered manner, the amplitude of the reciprocating movement of the two movers can be limited, the two movers can be reset conveniently, the swing limiting piece is rotated along with the reciprocating movement of the two movers in a staggered manner, the amplitude of the reciprocating movement of the two movers is further limited, vibration and noise caused by vibration due to overlarge moving amplitude of each mover when the motor works are prevented, the working noise of the hair trimmer is lower, the use feeling is improved, and the hair trimmer is more comfortable.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present utility model.

Fig. 2 is a schematic view showing an exploded structure of embodiment 1 of the present utility model.

Fig. 3 is a schematic view showing an exploded state structure of a mover according to embodiment 1 of the present utility model.

Fig. 4 is a schematic structural view of a second elastomer according to embodiment 2 of the present utility model.

The reference numerals include:

1. a bracket; 101. abutting the bump; 102. a positioning piece; 103. a rotating shaft; 11. a front bracket; 12. a rear bracket; 13. a limiting block; 2. a mover; 21. a magnet; 211. a first permanent magnet; 212. a second permanent magnet; 213. a separation block; 22. a yoke; 221. a plug pin; 23. a mover support; 231. abutting the groove; 24. a connecting bracket; 25. a shaft lever; 3. a stator; 31. a core; 32. an insulating support; 33. a coil; 4. an elastic member; 41. a first elastomer; 42. a second elastomer; 421. a separation groove; 422. a first elastic strip; 423. a second linear bar; 5. an avoidance structure; 6. a swing limiting piece; 61. a shaft hole; 62. and a pin hole.

Detailed Description

The present utility model will be described in detail below with reference to the accompanying drawings.

Example 1

As shown in fig. 1 to 3, a linear motor of the present utility model includes a support 1, a mover 2, a stator 3, and a plurality of elastic members 4, wherein a receiving space is provided in the support 1, and the mover 2 and the stator 3 are respectively disposed in the receiving space, so that the mover 2 and the stator 3 are disposed in the support 1. The number of the two active cells 2 is two, each active cell 2 is connected with the bracket 1 through the elastic piece 4 and relatively suspended in the stator 3, the stator 3 is fixedly connected with the bracket 1 and drives the two active cells 2 to reciprocate alternately, so that the elastic piece 4 is deformed along with the reciprocating movement of the two active cells 2 alternately, the amplitude of the reciprocating movement of the two active cells 2 alternately can be limited, the two active cells 2 are convenient to reset, and the active cells 2 can conveniently drive an external movable knife. Because the stator 3 drives the two movers 2 to reciprocate in a staggered way through an electromagnetic field, the stator 3 drives the movers 2 to work in a non-contact way, and the working noise of the motor is reduced.

The staggered reciprocating movement of the two movers 2 can offset the vibration generated by the reciprocating movement, so that the vibration of the motor is smaller when the motor works. The two movers 2 are arranged at intervals, so that mutual friction in the reciprocating movement process of the two movers 2 is prevented. Each rotor 2 is provided with dodges structure 5, dodge structure 5 is provided with limit pendulum spare 6 that is used for restricting two rotor 2 reciprocating motion range in, two rotor 2 pass through limit pendulum spare 6 and support 1 pin joint, when making stator 3 pass through the crisscross reciprocating motion of electromagnetic field drive rotor 2, limit pendulum spare 6 and move and rotate along with each rotor 2, make each rotor 2 reciprocating motion range limited, prevent that each rotor 2 from moving the too big noise that produces vibration and vibration arouse of amplitude of motor during operation, make hair trimmer's noise ratio low of working, promote the use impression, use hair trimmer more comfortable.

When the motor is used, the stator 3 is connected with alternating current to generate an electromagnetic field, the stator 3 drives the two movers 2 to reciprocate in a staggered manner through the electromagnetic field, the elastic piece 4 is deformed along with the staggered reciprocation of the two movers 2, the amplitude of the staggered reciprocation of the two movers 2 can be limited, the two movers 2 can be reset conveniently, the swing limiting piece 6 is rotated along with the staggered reciprocation of the two movers 2, the amplitude of the staggered reciprocation of the two movers 2 is further limited, and vibration and noise caused by vibration are prevented from being generated due to overlarge movement amplitude of each mover 2 when the motor works.

The stator 3 of this embodiment includes an iron core 31, an insulating support 32, and a coil 33, where the iron core 31 is fixed on the support 1, the iron core 31 is in a shape of a Chinese character 'shan', the insulating support 32 is fixed on a convex portion in the middle of the iron core 31, the coil 33 is an enameled wire, the coil 33 is wound on the insulating support 32, and an alternating current is connected with the coil 33 through an external power supply, so that the stator 3 generates an electromagnetic field, and the stator 3 drives the two movers 2 to reciprocate alternately through the electromagnetic field.

Each mover 2 of the present embodiment includes a magnet 21, a yoke 22, a mover support 23 and a connection support 24, the magnet 21 is fixed at one end of the yoke 22 facing the stator 3, and one end of the yoke 22 facing away from the stator 3 is connected with the mover support 23, so that the magnet 21 is close to the stator 3, and the stator 3 is convenient to drive the mover 2 through an electromagnetic field.

The connecting brackets 24 are fixed on both sides of each mover bracket 23 for connecting with the elastic members 4, so that the mover 2 is connected with the bracket 1 through the elastic members 4 and is oppositely suspended in the stator 3.

The magnets 21 of the two stators 3 are provided with different polarities, so that when the stators 3 drive the two movers 2 through electromagnetic fields, the two movers 2 reciprocate in a staggered manner.

The elastic member 4 of the present embodiment includes 4 first elastic bodies 41 and 4 second elastic bodies 42, and both ends of each first elastic body 41 are respectively abutted between the outer side of each mover frame 23 and the inner side of the frame 1, so that the mover 2 is more easily restored when reciprocally moving by the first elastic bodies 41.

The two ends of each second elastic body 42 are respectively fixed between the outer side of the bracket 1 and the outer side of each connecting bracket 24, so that the mover 2 is connected with the bracket 1 through the second elastic bodies 42 and is oppositely suspended in the stator 3.

In this embodiment, the outer side of each movable element support 23 is provided with an abutment groove 231 corresponding to the first elastic body 41, the inner side of the support 1 is provided with an abutment projection 101 corresponding to the first elastic body 41, one end of the first elastic body 41 is provided in the abutment groove 231, and the other end of the first elastic body 41 is sleeved on the abutment projection 101, so that the first elastic body 41 is kept between the outer side of each movable element support 23 and the inner side of the support 1, and is not easy to displace.

The support 1 of this embodiment is provided with a positioning member 102, the positioning member 102 penetrates through each avoiding structure 5, the positioning member 102 is provided with a rotating shaft 103, and the middle part of the swing limiting member 6 is provided with a shaft hole 61 rotationally connected with the rotating shaft 103, so that the swing limiting member 6 is rotationally connected with the positioning member 102.

The two ends of the swing limiting piece 6 are respectively provided with a bolt hole 62, each magnet yoke 22 is provided with a bolt 221, and the two ends of the swing limiting piece 6 are respectively connected with the bolts 221 of each magnet yoke 22 in a rotating way through the bolt holes 62, so that the swing limiting piece 6 is respectively connected with each rotor 2 in a rotating way, the two rotors 2 are pivoted with the bracket 1 through the swing limiting piece 6, the swing limiting piece 6 rotates along with the reciprocating movement of the two rotors 2, the amplitude of the reciprocating movement of the two rotors 2 is limited, and vibration and noise caused by vibration due to the overlarge movement amplitude of each rotor 2 during motor operation are prevented.

Each magnet 21 of the present embodiment includes a first permanent magnet 211 and a second permanent magnet 212, and the first permanent magnet 211 and the second permanent magnet 212 are arranged along the length direction of the yoke 22, so that the stator 3 drives the two movers 2 to reciprocate alternately. The polarities of the adjacent ends of the first permanent magnet 211 and the second permanent magnet 212 are different, so that the amplitude of the reciprocating movement of the mover 2 can be limited.

A separation block 213 is arranged between the first permanent magnet 211 and the second permanent magnet 212, so that the first permanent magnet 211 and the second permanent magnet 212 are separated, a certain distance is kept, and the first permanent magnet 211 and the second permanent magnet 212 are prevented from approaching.

The support 1 of this embodiment includes a front support 11 and a rear support 12, and the front support 11 and the rear support 12 are fixedly connected to form a containing space for containing the mover 2 and the stator 3, so that the mover 2 and the stator 3 are contained inside the support 1, and the mover 2 and the stator 3 are protected.

The front bracket 11 and the rear bracket 12 are both provided with a limiting block 13 for fixing the stator 3, and the stator 3 is kept at the inner side of the bracket 1 through the limiting block 13, so that the stability of the motor is improved.

The avoidance structure 5 of this embodiment is an avoidance groove, and provides a rotating space for the swing member 6 through the avoidance groove. The mover 2 is provided with a shaft 25, and an external moving blade (not shown) is driven by the shaft 25. In practical use, any one of the movers 2 is provided with the shaft lever 25, so that external movable cutters (not shown) can be conveniently driven by the shaft lever 25.

Example 2

As shown in fig. 4, this embodiment is substantially the same as a linear motor of embodiment 1, except that,

the number of the second elastic bodies 42 in this embodiment is 2, the separation groove 421 is disposed at the end of the second elastic body 42 connected to the bracket 1, and the first elastic strip 422 and the second linear strip 423 are formed by the second elastic body 42 through the separation groove 421, so that the number of the second elastic bodies 42 is reduced, and the number of motor accessories is reduced. The first elastic strip 422 and the second elastic strip 423 are respectively connected with the outer sides of the corresponding connecting brackets 24, so that the reciprocating movement of the two movers 2 in a staggered way is not interfered with each other.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims

1. A linear motor, characterized in that: the device comprises a bracket (1), a rotor (2), a stator (3) and a plurality of elastic pieces (4), wherein an accommodating space is arranged in the bracket (1), and the rotor (2) and the stator (3) are respectively arranged in the accommodating space;

the number of the two movers (2) is two, each of the movers (2) is connected with the bracket (1) through the elastic piece (4) and is oppositely suspended in the stator (3), and the stator (3) is fixedly connected with the bracket (1) and drives the two movers (2) to reciprocate in a staggered manner;

two active cell (2) interval sets up, and each active cell (2) all is provided with dodges structure (5), dodge and be provided with in structure (5) and be used for restricting two active cell (2) reciprocating motion range limit goods of furniture for display rather than for use (6), two active cell (2) pass through limit goods of furniture for display rather than for use (6) with support (1) pin joint.

2. A linear motor according to claim 1, wherein: the stator (3) comprises an iron core (31), an insulating support (32) and a coil (33), wherein the iron core (31) is fixed on the support (1), the iron core (31) is in a Chinese character 'shan' shape, the insulating support (32) is fixed on a protruding part in the middle of the iron core (31), and the coil (33) is wound on the insulating support (32).

3. A linear motor according to claim 1, wherein: each rotor (2) comprises a magnet (21), a magnet yoke (22), a rotor support (23) and a connecting support (24), wherein the magnet (21) is fixed at one end of the magnet yoke (22) facing the stator (3), one end of the magnet yoke (22) deviating from the stator (3) is connected with the rotor support (23), and the connecting support (24) is fixed at two sides of each rotor support (23) and is used for being connected with the elastic piece (4);

the polarities of the magnets (21) of the two stators (3) are different.

4. A linear motor according to claim 3, characterized in that: the elastic piece (4) comprises a plurality of first elastic bodies (41) and a plurality of second elastic bodies (42), and two ends of each first elastic body (41) are respectively abutted between the outer side of each rotor bracket (23) and the inner side of the bracket (1);

both ends of each second elastic body (42) are respectively fixed between the outer side of the bracket (1) and the outer side of each connecting bracket (24).

5. A linear motor according to claim 4, wherein: an abutting groove (231) is formed in the outer side of each rotor support (23) corresponding to the first elastic body (41), an abutting protruding block (101) is formed in the inner side of each support (1) corresponding to the first elastic body (41), one end of each first elastic body (41) is arranged in the abutting groove (231), and the other end of each first elastic body (41) is sleeved on the corresponding protruding block (101).

6. A linear motor according to claim 4, wherein: one end of the second elastic body (42) connected with the support (1) is provided with a separation groove (421), the second elastic body (42) forms a first elastic strip (422) and a second linear strip (423) through the separation groove (421), and the first elastic strip (422) and the second linear strip (423) are respectively connected with the outer sides of the corresponding connecting supports (24).

7. A linear motor according to claim 3, characterized in that: the support (1) is provided with setting element (102), setting element (102) runs through each dodge structure (5), setting element (102) is provided with pivot (103), the middle part of limit pendulum spare (6) be provided with shaft hole (61) that pivot (103) rotate and be connected, the both ends of limit pendulum spare (6) are provided with bolt hole (62) respectively, each yoke (22) all are provided with bolt (221), the both ends of limit pendulum spare (6) are passed through respectively bolt hole (62) and each bolt (221) of yoke (22) rotate and are connected.

8. A linear motor according to claim 3, characterized in that: each magnet (21) comprises a first permanent magnet (211) and a second permanent magnet (212), the first permanent magnet (211) and the second permanent magnet (212) are arranged along the length direction of the magnetic yoke (22), the polarities of the adjacent ends of the first permanent magnet (211) and the second permanent magnet (212) are different, and a separation block (213) is arranged between the first permanent magnet (211) and the second permanent magnet (212).

9. A linear motor according to claim 1, wherein: the support (1) comprises a front support (11) and a rear support (12), wherein the front support (11) is fixedly connected with the rear support (12) to form a containing space for containing the rotor (2) and the stator (3);

the front support (11) and the rear support (12) are both provided with limiting blocks (13) for fixing the stator (3).

10. A linear motor according to claim 1, wherein: dodging structure (5) is dodging the groove, active cell (2) are provided with axostylus axostyle (25), through axostylus axostyle (25) are convenient for drive outside moves the sword.