CN111146920A - Voice coil motor - Google Patents
Voice coil motor Download PDFInfo
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- CN111146920A CN111146920A CN202010031877.2A CN202010031877A CN111146920A CN 111146920 A CN111146920 A CN 111146920A CN 202010031877 A CN202010031877 A CN 202010031877A CN 111146920 A CN111146920 A CN 111146920A
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- coil winding
- magnets
- voice coil
- mounting portion
- coil motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The invention relates to the technical field of motors, in particular to a voice coil motor, which comprises a shell with an accommodating part; the magnets are attached to the inner wall of the periphery of the shell and used for providing a constant magnetic field, and the magnets form a magnet array; the coil winding is arranged in the accommodating part and positioned in the magnet array, and a gap is formed between the coil winding and the magnet; a support mechanism for mounting the coil winding and the load; when the coil winding is electrified, the periphery of the coil winding is acted by electromagnetic force in the magnet array, and the coil winding reciprocates up and down in the accommodating part by changing the direction and the magnitude of current so as to drive the supporting mechanism to move together with a load arranged on the supporting mechanism. The voice coil motor can enable four surfaces of the coil winding wound on the supporting structure to be located in the working air gap, so that the electric work utilization rate of the coil winding is improved, and higher operation efficiency and load bearing capacity are obtained.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a voice coil motor.
Background
The Voice Coil Motor (Voice Coil activator/Voice Coil Motor) is named because its structure is similar to that of a Voice Coil of a loudspeaker, and is widely applied to the fields of medical treatment, semiconductors, aviation, automobiles and the like because of the characteristics of high frequency response and high precision. The voice coil motor is a direct current motor which converts electric energy into mechanical energy and is mainly divided into a linear type and a swinging type, and regular linear type or limited swinging angle movement is generated by utilizing the stress of an electrified lead in a magnetic field generated by permanent magnet excitation.
For the traditional structure of a square or rectangular voice coil motor, no matter a long moving coil or a short moving coil, only coils on two sides are positioned in a working air gap, so that the electric power is not fully utilized, and the electromagnetic force is small.
In view of the above, it is an urgent technical problem in the art to provide a new voice coil motor that overcomes the above drawbacks in the prior art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a voice coil motor which can enable four surfaces of a coil winding wound on a supporting structure to be positioned in a working air gap so as to improve the electric work utilization rate of the coil winding and obtain higher operation efficiency and load bearing capacity.
The object of the invention can be achieved by the following technical measures:
an embodiment of the present invention provides a voice coil motor, including:
a housing having an accommodating portion;
the magnets are attached to the inner wall of the periphery of the shell and used for providing a constant magnetic field, one side, close to the inner wall of the shell, of each magnet is S-pole, the other side of each magnet is N-pole, and the magnets form a magnet array;
the coil winding is arranged in the accommodating part and positioned in the magnet array, and a gap is formed between the coil winding and the magnet;
the supporting mechanism is used for mounting the coil winding, one end of the supporting mechanism is positioned in the shell and connected with the coil winding, and the other end of the supporting mechanism is positioned outside the shell and connected with a load; when the coil winding is electrified, the periphery of the coil winding in the magnet array is under the action of electromagnetic force, and the coil winding is made to reciprocate up and down in the accommodating part by changing the direction and the magnitude of current so as to drive the supporting mechanism and a load arranged on the supporting mechanism to move together.
According to one embodiment of the invention, a through hole is formed in one side of the housing, the support mechanism comprises a first mounting portion located in the accommodating portion, a second mounting portion located outside the housing, and a connecting portion connecting the first mounting portion and the second mounting portion through the through hole, the coil winding is sleeved on the first mounting portion, and the load is mounted on the second mounting portion.
According to an embodiment of the present invention, the first mounting part has a hollow structure, and the voice coil motor further includes a guide mechanism mounted in the hollow structure.
According to one embodiment of the invention, the guiding mechanism is made of hard aluminum alloy or 3D material.
According to an embodiment of the present invention, the first mounting portion includes a first stopper, a second stopper, and a fixing block connected between the first stopper and the second stopper, and the coil winding is sleeved on the fixing block and located between the first stopper and the second stopper.
According to one embodiment of the invention, the second mounting portion is in an i-shape, and the connecting portion includes a first connecting block connecting one end of the second mounting portion with the first limiting block and a second connecting block connecting the other end of the second mounting portion with the second limiting block.
According to an embodiment of the present invention, the magnets include three first magnets and two second magnets, the housing includes three first side plates and one second side plate, the first side plate and the second side plate together form the accommodating portion, the through hole is located in the second side plate, the second magnets are attached to an inner wall of the second side plate, the two second magnets are respectively located on two sides of the through hole, the first magnets are attached to an inner wall of the first side plate, and one first magnet is disposed corresponding to one first side plate.
According to one embodiment of the present invention, the coil windings are square, each of the first magnets has a width equal to a side length of the coil windings, and each of the second magnets has a width half of the side length of the coil windings.
According to one embodiment of the invention, the housing is made of iron or steel material.
According to one embodiment of the present invention, the support mechanism is made of a cemented aluminum alloy material.
The voice coil motor can enable four surfaces of the coil winding wound on the supporting structure to be positioned in the working air gap so as to improve the electric work utilization rate of the coil winding, thereby obtaining higher operation efficiency and load bearing capacity.
Drawings
Fig. 1 is an exploded view of a voice coil motor according to an embodiment of the present invention.
Fig. 2 is a schematic perspective view of a voice coil motor according to an embodiment of the present invention.
Fig. 3 is a front view of a voice coil motor according to an embodiment of the present invention.
Fig. 4 is a sectional view taken along a-a in fig. 3.
Fig. 5 is a schematic sectional view of a left side view of a voice coil motor according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Many aspects of the invention are better understood with reference to the following drawings. The components in the drawings are not necessarily to scale. Instead, emphasis is placed upon clearly illustrating the components of the present invention. Moreover, in the several views of the drawings, like reference numerals designate corresponding parts.
The word "exemplary" or "illustrative" as used herein means serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" or "illustrative" is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described below are exemplary embodiments provided to enable persons skilled in the art to make and use the examples of the disclosure and are not intended to limit the scope of the disclosure, which is defined by the claims. In other instances, well-known features and methods are described in detail so as not to obscure the invention. For purposes of the description herein, the terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," and derivatives thereof shall relate to the invention as oriented in fig. 1. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
The voice coil motor provided by the embodiment of the invention is applied to automatic laser processing equipment, is mainly used for fixing a vertical movement mechanism of an optical lens and a laser head, or can bear higher load in a micro horizontal movement space, such as a piston gun, and still meets the real-time requirement of sufficient output to obtain the optimal movement performance (such as high acceleration and high response) under the conditions of large load and small stroke. Compared with the traditional voice coil motor, the voice coil motor provided by the embodiment of the invention can provide more than two times of output force and can meet the bearing requirement of higher load.
Fig. 1 is an exploded view of a voice coil motor according to an embodiment of the present invention. Referring to fig. 1, the voice coil motor includes: the electromagnetic force is generated after the coil winding 30 is electrified, and under the action of the electromagnetic force, the coil winding 30 drives the load to do linear motion together through the supporting mechanism 40.
Referring to fig. 1, the case 10 is made of iron or steel material for providing a closed magnetic circuit. Further, the housing 10 includes three first side plates 11 and one second side plate 12, the first side plate 11 and the second side plate 12 together form an accommodating portion 13, and the second side plate 12 is provided with a through opening 121.
Referring to fig. 1 and 2, a plurality of magnets 20 are attached to the inner wall of the housing 10, one side of the magnet 20 close to the inner wall of the housing is an S-pole, and the other side is an N-pole, and the plurality of magnets 20 form a magnet array. Referring to fig. 1 to 4, further, the magnets 20 include three first magnets 21 and two second magnets 22, wherein the second magnets 22 are attached to the inner wall of the second side plate 12, the two second magnets 22 are respectively located at two sides of the through hole 121, the first magnets 21 are attached to the inner wall of the first side plate 11, and one first magnet 21 is disposed corresponding to one first side plate 11.
Further, referring to fig. 1 to 4, the coil winding 30 is disposed in the accommodating portion 13 and located in the magnet array, and a gap 50 is formed between the periphery of the coil winding 30 and the magnet 20; further, the coil windings 30 are square, and each of the first magnets 21 has a width equal to a side length of the coil winding 30, and each of the second magnets 22 has a width half of the side length of the coil winding 30. This arrangement can provide a fixed magnetic path, so that the entire coil winding 30 can fall into the magnetic field array sufficiently, thereby improving the electromagnetic force and preventing only the coil windings 30 on both sides (e.g., rectangular voice coils) from being located in the magnetic flux. In the present embodiment, when the coil winding 30 is energized, the periphery of the coil winding 30 can be excited by a constant magnetic field, and under the action of the electromagnetic principle, the energized coil winding 30 can generate an electromagnetic thrust effect under the action of the magnetic field. Through the layout of the coil winding 30 and the magnet 20, the electromagnetic thrust of the voice coil motor can be increased to more than twice that of a traditional rectangular voice coil.
Referring to fig. 1 and 2, the supporting mechanism 40 is made of a hard aluminum alloy material, one end of the supporting mechanism 40 is located inside the housing 10 and connected to the coil winding 30, and the other end of the supporting mechanism 40 is located outside the housing 10 and connected to the load. Further, the supporting mechanism 40 includes a first mounting portion 41 located in the accommodating portion 13, a second mounting portion 42 located outside the housing 10, and a connecting portion 43 connecting the first mounting portion 41 and the second mounting portion 42 through the through opening 121, the coil winding 30 is sleeved on the first mounting portion 41, the load is mounted on the second mounting portion 42, and under the action of electromagnetic force, the coil winding 30 makes linear motion in the accommodating portion 13 and drives the supporting mechanism 40 to make linear motion in the through opening 121, so as to drive the load to move together.
Referring to fig. 1, the first mounting portion 41 includes a first stopper 411, a second stopper 412 and a fixing block 413 connected between the first stopper 411 and the second stopper 412, and the coil winding 30 is sleeved on the fixing block 413 and located between the first stopper 411 and the second stopper 412. The second mounting portion 42 is h-shaped, and the connecting portion 43 includes a first connecting block 431 connecting one end of the second mounting portion 42 and the first stopper 411 and a second connecting block 432 connecting the other end of the second mounting portion 42 and the second stopper 412.
Referring to fig. 1, 2, 4 and 5, the first mounting portion 41 has a hollow structure 414, and the voice coil motor further includes a guide mechanism 60 mounted in the hollow structure 414, specifically, the guide mechanism 60 is made of a hard aluminum alloy or a 3D material, the guide mechanism 60 is a guide rod, and the guide mechanism 60 provides a guiding function during the mounting and moving of the support mechanism 40, so that the mounting of the support mechanism 40 and the movement of the load are more stable.
In this embodiment, when the coil winding 30 is energized with a reverse direct current, the periphery of the coil winding 30 is acted by an overall downward electromagnetic force, and the coil winding 30 linearly moves downward in the accommodating portion 13 to drive the supporting mechanism 40 and the load mounted on the supporting mechanism 40 to move together; when the coil winding 30 is supplied with the forward direct current, the entire periphery of the coil winding 30 is subjected to the upward electromagnetic force, and the coil winding 30 linearly moves upward in the accommodating portion 13 to drive the supporting mechanism 40 and the load mounted on the supporting mechanism 40 to move together. The voice coil motor of the embodiment of the present invention drives the supporting mechanism 40 to move together with the load mounted on the supporting mechanism 40 by changing the direction and magnitude of the current to reciprocate the coil winding 30 up and down in the accommodating portion.
The voice coil motor provided by the embodiment of the invention can be applied to the semiconductor high-precision equipment industry and the life science field (such as gene detection, cancer screening and the like), can realize one-button replacement under the conditions of not increasing extra cost and needing to bear higher load, is simple in installation process and processing compared with a cylindrical or arc voice coil motor, and can improve the overall energy efficiency of a motor body through the structural changes of the coil winding 30, the magnet 20 and the shell 10.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A voice coil motor, comprising:
a housing having an accommodating portion;
the magnets are attached to the inner wall of the periphery of the shell and used for providing a constant magnetic field, one side, close to the inner wall of the shell, of each magnet is S-pole, the other side of each magnet is N-pole, and the magnets form a magnet array;
the coil winding is arranged in the accommodating part and positioned in the magnet array, and a gap is formed between the coil winding and the magnet;
the supporting mechanism is used for mounting the coil winding, one end of the supporting mechanism is positioned in the shell and connected with the coil winding, and the other end of the supporting mechanism is positioned outside the shell and connected with a load; when the coil winding is electrified, the periphery of the coil winding in the magnet array is under the action of electromagnetic force, and the coil winding is made to reciprocate up and down in the accommodating part by changing the direction and the magnitude of current so as to drive the supporting mechanism and a load arranged on the supporting mechanism to move together.
2. The voice coil motor of claim 1, wherein a port is formed at one side of the housing, the supporting mechanism comprises a first mounting portion located in the accommodating portion, a second mounting portion located outside the housing, and a connecting portion for connecting the first mounting portion and the second mounting portion through the port, the coil winding is sleeved on the first mounting portion, and the load is mounted on the second mounting portion.
3. The voice coil motor of claim 2, wherein the first mounting portion has a hollow structure, the voice coil motor further comprising a guide mechanism mounted in the hollow structure.
4. The voice coil motor of claim 3, wherein the guide mechanism is made of a hard aluminum alloy or a 3D material.
5. The voice coil motor of claim 2, wherein the first mounting portion comprises a first limiting block, a second limiting block and a fixing block connected between the first limiting block and the second limiting block, and the coil winding is sleeved on the fixing block and located between the first limiting block and the second limiting block.
6. The voice coil motor of claim 5, wherein the second mounting portion is I-shaped, and the connecting portion comprises a first connecting block connecting one end of the second mounting portion with the first limiting block and a second connecting block connecting the other end of the second mounting portion with the second limiting block.
7. The voice coil motor of claim 2, wherein the magnets include three first magnets and two second magnets, the housing includes three first side plates and one second side plate, the first side plate and the second side plate together form the receiving portion, the opening is located on the second side plate, the second magnets are attached to an inner wall of the second side plate, the two second magnets are respectively located on two sides of the opening, the first magnets are attached to an inner wall of the first side plate, and the one first magnet is disposed corresponding to the one first side plate.
8. The voice coil motor of claim 7, wherein the coil windings are square, each of the first magnets has a width equal to a side length of the coil windings, and each of the second magnets has a width half of the side length of the coil windings.
9. The voice coil motor of claim 1, wherein the housing is made of an iron or steel material.
10. The voice coil motor of claim 1, wherein the support mechanism is made of a hard aluminum alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010031877.2A CN111146920A (en) | 2020-01-13 | 2020-01-13 | Voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010031877.2A CN111146920A (en) | 2020-01-13 | 2020-01-13 | Voice coil motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111146920A true CN111146920A (en) | 2020-05-12 |
Family
ID=70524609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010031877.2A Pending CN111146920A (en) | 2020-01-13 | 2020-01-13 | Voice coil motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111146920A (en) |
-
2020
- 2020-01-13 CN CN202010031877.2A patent/CN111146920A/en active Pending
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