CN112803697B - Linear drive assembly - Google Patents
Linear drive assembly Download PDFInfo
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- CN112803697B CN112803697B CN202110062450.3A CN202110062450A CN112803697B CN 112803697 B CN112803697 B CN 112803697B CN 202110062450 A CN202110062450 A CN 202110062450A CN 112803697 B CN112803697 B CN 112803697B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
Abstract
The invention provides a linear driving assembly, which comprises an elastic bracket, a coil assembly, a first permanent magnet and a second permanent magnet, wherein the coil assembly is arranged on the elastic bracket; wherein elastic support formula frame construction as an organic whole, elastic support include fixed plate, first cavity, second cavity, first deformation portion and second deformation portion, and fixed plate center department is provided with coil assembly chamber. The coil assembly is arranged in the coil assembly cavity, n coil assemblies are arranged along the axial direction of the elastic support, and n is a positive integer. The first permanent magnet is disposed within the first cavity. The second permanent magnet is arranged in the second cavity, and the magnetic poles of the corresponding side surfaces between the second permanent magnet and the second permanent magnet are like magnetic poles. According to the linear driving assembly, the coil assembly, the two permanent magnets and the product shell are assembled by arranging the elastic support, so that the assembly error caused by combination of multiple parts is avoided, the precision of the linear driving assembly is improved, and the performance of the linear driving assembly is optimized.
Description
Technical Field
The invention relates to the field of linear driving devices, in particular to a linear driving assembly.
Background
With the rapid development of automatic control technology and microcomputers, higher requirements are put forward on the positioning accuracy of various automatic control systems, and under the condition, a traditional rotating motor is added with a linear motion driving device consisting of a set of conversion mechanisms, and assembly errors caused by multi-part combination are avoided, so that the accuracy of the motor is reduced, the vibration sense is large, and the requirements of modern control systems cannot be met.
It is desirable to provide a linear driving assembly to solve the above problems.
Disclosure of Invention
The invention provides a linear driving assembly, which is used for assembling a coil assembly, a permanent magnet and a product by arranging an elastic support so as to solve the problems of low precision and large vibration sense of a linear driving motor in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows: a linear drive assembly; it includes:
the elastic support is an integrated frame structure and comprises a fixing plate, a first cavity, a second cavity, a first deformation part and a second deformation part, wherein the first cavity and the second cavity are oppositely arranged at two ends of the fixing plate, a first deformation part and a second deformation part are oppositely arranged at two sides of the fixing plate, the first deformation part is connected with one end of the first cavity and one end of the second cavity, and the second deformation part connects the other end of the first cavity and the other end of the second cavity;
a coil assembly cavity is arranged at the center of the fixing plate and is arranged between the first cavity and the second cavity;
the coil assemblies are arranged in the coil assembly cavities, n coil assemblies are arranged along the axial direction of the elastic support, and n is a positive integer;
the first permanent magnet is arranged in the first cavity and is a multi-pole magnet with alternately different polarities;
the second permanent magnet is arranged in the second cavity, the second permanent magnet is a multi-pole magnet with alternately different polarities, and the magnetic poles of the corresponding side surfaces between the second permanent magnet and the first permanent magnet are like magnetic poles; and
the first permanent magnet and the second permanent magnet are respectively oppositely arranged at two sides of the coil assembly, and the number of the permanent magnet poles of the first permanent magnet and the second permanent magnet is n + 1;
the projection of the single coil assembly on the first cavity is positioned between two adjacent pole numbers in the first permanent magnet;
the projection of the single coil assembly on the first cavity is positioned between two adjacent pole numbers in the second permanent magnet. The fixed plate of the elastic support has the supporting function of the elastic piece, and simultaneously has the vibration damping function, so that the vibration of the motor is not transmitted to the shell of the electric appliance.
In the invention, the linear driving assembly further comprises a spring piece, the spring piece is arranged in the elastic support and connects the first deformation part and the second deformation part, and the spring piece is used for resetting the elastic support.
In the invention, the first permanent magnet comprises a first magnetic pole and a second magnetic pole which are adjacent and opposite, the first cavity comprises a first driving position and a second driving position along the motion track of the long edge of the elastic bracket,
when the first cavity is positioned at a first driving position, the distance between a single coil assembly and the first magnetic pole is smaller than the distance between a single coil assembly and the second magnetic pole,
when the first cavity is located at a second driving position, the distance between a single coil assembly and the second magnetic pole is smaller than the distance between a single coil assembly and the first magnetic pole;
the second permanent magnet comprises a third magnetic pole and a fourth magnetic pole which are adjacent and have opposite polarities, the third permanent magnetic pole is opposite to the first magnetic pole in position and has the same magnetic pole property, the fourth magnetic pole is opposite to the second magnetic pole in position and has the same magnetic pole property, the second cavity comprises a third driving position and a fourth driving position along the motion track of the long edge of the elastic support,
when the second cavity is positioned at the third driving position, the distance between a single coil assembly and the fourth magnetic pole is smaller than the distance between a single coil assembly and the third magnetic pole,
when the second cavity is located at a fourth driving position, the distance between a single coil assembly and the third magnetic pole is smaller than the distance between a single coil assembly and the fourth magnetic pole;
when the first cavity is located at the first driving position, the second cavity is located at the third driving position; when the first cavity is in the second driving position, the second cavity is in the fourth driving position.
In the present invention, the distance between the centers of the pole numbers of the adjacent permanent magnets is equal to the distance between the centers of the adjacent coil assemblies.
In the invention, one side of the first deformation part, which is close to the fixed plate, is provided with a first limiting groove, one side of the fixed plate, which corresponds to the first limiting groove, is provided with a first limiting bulge, the first limiting bulge is arranged in the first limiting groove, and the first limiting bulge is used for limiting the position of the first deformation part;
a second limiting groove is formed in one side, close to the fixing plate, of the second deformation part, a second limiting protrusion is arranged at the position, corresponding to the limiting groove, of one side of the fixing plate, the second limiting protrusion is arranged in the second limiting groove, and the second limiting protrusion is used for limiting the position of the second deformation part.
In the present invention, the spring plate includes:
the first fixing part is arranged at one end of the spring piece and is fixedly connected with the first cavity;
the second fixing part is arranged at the other end of the spring piece relative to the first fixing part and is fixedly connected with the second cavity; and
and the elastic part is arranged in the middle of the spring piece and connects the first fixing part with the second fixing part, and the elastic part is arranged at one end of the arrangement direction of the coil assemblies.
In the invention, the elastic part comprises at least one elastic connecting section which is in a U-shaped structure.
In the invention, when n is larger than 1, the winding directions of the adjacent coil assemblies are opposite.
In the invention, the coil component comprises a framework and a coil wound on the framework;
the iron core is arranged inside the framework and used for increasing the magnetic field intensity.
In the invention, when n is larger than 1, the winding directions of the adjacent coil assemblies are the same;
the first permanent magnets and the second permanent magnets are respectively provided with n, and the arrangement directions of the n first permanent magnets and the n second permanent magnets are parallel to the arrangement directions of the n adjacent coil assemblies;
wherein the single coil assembly corresponds to the single first permanent magnet and the single second permanent magnet one to one;
the first permanent magnet comprises two permanent magnet poles with alternately different polarities, and the magnetic poles at two adjacent ends of the adjacent first permanent magnets are different;
the second permanent magnet also comprises two permanent magnet poles with alternately different polarities, the magnetic poles at two adjacent ends of the adjacent second permanent magnets are different, and the magnetic poles at the corresponding side between the second permanent magnet and the second permanent magnet are same-polarity magnetic poles;
the projection of the single coil assembly on the first cavity is positioned between the adjacent two permanent magnet poles in the first permanent magnet;
the projection of the single coil assembly on the first cavity is positioned between the adjacent two permanent magnet poles in the second permanent magnet.
Compared with the prior art, the invention has the beneficial effects that: according to the linear driving assembly, the coil assembly, the two permanent magnets and the product shell are assembled by arranging the elastic support, so that the assembly error caused by combination of multiple parts is avoided, the precision of the linear driving assembly is improved, and the performance of the linear driving assembly is optimized.
The elastic support is an integrated part formed by injection molding of high-elasticity and high-toughness engineering plastics, and plays both an elastic recovery function and a supporting function. The linear driving assembly is installed on the electric appliance product through the fixing plate of the elastic support, and the linear driving assembly is connected with the electric appliance shell through the elastic part of the elastic support, so that the vibration sense of the linear driving assembly in the using process is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding to some embodiments of the present invention.
Fig. 1 is a perspective view of a preferred embodiment of the linear drive assembly of the present invention.
Fig. 2 is a side view of a preferred embodiment of the linear drive assembly of the present invention.
Fig. 3 is a top view of the resilient mount of the preferred embodiment of the linear drive assembly of the present invention.
Fig. 4 is a schematic view of the internal structure of the preferred embodiment of the linear driving assembly of the present invention.
Fig. 5 is a perspective view of a coil assembly of a preferred embodiment of the linear drive assembly of the present invention.
FIG. 6 is a perspective view of a spring plate of the preferred embodiment of the linear drive assembly of the present invention.
Fig. 7 is a structural diagram illustrating a use state of the preferred embodiment of the linear driving assembly of the present invention.
Fig. 8 is a schematic diagram of the operation of a preferred embodiment of the linear drive assembly of the present invention.
Fig. 9 is a partial structural view of the elastic support when a positive pulse voltage is input to the coil assembly of the preferred embodiment of the linear driving assembly of the present invention.
Fig. 10 is a partial structural view of the elastic support when negative pulse voltage is input to the coil assembly of the preferred embodiment of the linear driving assembly of the present invention.
Fig. 11 is a schematic structural diagram of a linear driving assembly according to a second embodiment of the present invention.
Fig. 12 is a schematic structural diagram of the operation principle of the second embodiment of the linear driving assembly of the present invention.
Fig. 13 is a partial structural diagram of the elastic support when a positive pulse voltage is input to the coil assembly of the second embodiment of the linear driving assembly according to the present invention.
Fig. 14 is a partial structural diagram of the elastic support when negative pulse voltage is input to the coil assembly of the second embodiment of the linear driving assembly of the present invention.
Reference numbers for the first embodiment: the coil assembly structure comprises an elastic support 1, a fixing plate 11, a first limiting protrusion 111, a second limiting protrusion 112, a first cavity 12, a second cavity 13, a first deformation part 14, a first connecting block 141, a second connecting block 142, a first limiting groove 143, a second deformation part 15, a third connecting block 151, a fourth connecting block 152, a second limiting groove 153, a coil assembly cavity 16, a coil assembly 2, a winding 21, an iron core 22, a framework 23, a first coil assembly 2a, a first winding 21a, a first iron core 22a, a first framework 23a, a second coil assembly 2b, a second winding 21b, a second iron core 22b, a second framework 23b, a first permanent magnet 3, a second permanent magnet 4, a spring piece 5, a first fixing part 51, a second fixing part 52, an elastic part 53, a shaft assembly 8 and a vibrator assembly 9.
Reference numerals of the second embodiment: the coil assembly comprises an elastic support 6, a first cavity 62, a second cavity 63, a coil assembly cavity 66, a coil assembly 7, a winding 71, an iron core 72, a first coil assembly 7a, a first iron core 72a, a second coil assembly 7b, a second iron core 72b, a first permanent magnet 3a and a second permanent magnet 4 a.
Detailed Description
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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the drawings, elements having similar structures are denoted by the same reference numerals.
The terms "first," "second," and the like in the terms of the invention are used for descriptive purposes only and not for purposes of indication or implication relative importance, nor as a limitation on the order of precedence.
Referring to fig. 1, fig. 1 is a perspective view of a linear driving assembly according to a preferred embodiment of the present invention. The following is a preferred embodiment of the present invention that provides a linear driving assembly capable of solving the above technical problems.
The preferred embodiment of the linear driving assembly provided by the invention is as follows: a linear drive assembly; it comprises an elastic bracket 1, a coil component 2, a first permanent magnet 3 and a second permanent magnet 4; wherein elastic support 1 formula frame construction as an organic whole, elastic support 1 includes fixed plate 11, first cavity 12, second cavity 13, first deformation portion 14 and second deformation portion 15, wherein first cavity 12 and second cavity 13 set up relatively at fixed plate 11 both ends, fixed plate 11 both sides set up and are provided with first deformation portion 14 and second deformation portion 15 relatively, first deformation portion 14 is connected with first cavity 12 one end and second cavity 13 one end, second deformation portion 15 is connected the first cavity 12 other end and the second cavity 13 other end.
A coil assembly chamber 16 is provided at the center of the fixing plate 11, and the coil assembly chamber 16 is provided between the first chamber 12 and the second chamber 13. The coil assembly 2 is arranged in the coil assembly cavity 16, and n coil assemblies 2 are arranged along the axial direction of the elastic support 1, wherein n is a positive integer. The first permanent magnet 3 is disposed in the first cavity 12, and the first permanent magnet 3 is a multi-pole magnet having alternately different polarities. The second permanent magnet 4 is disposed in the second cavity 13, the second permanent magnet 4 is a multi-pole magnet with alternately different polarities, and the magnetic poles of the corresponding sides between the second permanent magnet 4 and the second permanent magnet 4 are like poles.
The first permanent magnet 3 and the second permanent magnet 4 are respectively arranged at two ends of the coil component 2 oppositely, and the number of the permanent magnet poles in the first permanent magnet 3 and the second permanent magnet 4 is n + 1; the projection of the single coil assembly 2 on the first cavity 12 is positioned between two adjacent pole numbers in the first permanent magnet 3; the projection of the single coil assembly 2 on the second cavity 13 is located between two adjacent poles in the second permanent magnet 4.
The elastic support 1 has an elastic supporting function and a vibration damping function, and ensures that the vibration of the motor is not transmitted to the shell of the electric appliance. The linear driving assembly is arranged on an electric appliance product through a fixing plate 11 of an elastic support 1 and is connected with a transmission part through two cavities of the elastic support 1. According to the linear driving assembly, the coil assembly 2, the first permanent magnet 3, the second permanent magnet 4 and a product are assembled by arranging the elastic support 1, so that assembly errors caused by combination of multiple parts are avoided, the precision of the linear driving assembly is improved, and the performance of the linear driving assembly is optimized. And the first cavity 12 and the second cavity 13 do opposite reciprocating motion, so that the performance of the driving motor is further optimized, the vibration sense of the shell of the electric appliance is reduced, and the comfort level of the driving motor product is improved.
Referring to fig. 2, 3 and 4 in combination, fig. 2 is a side view of a preferred embodiment of the linear drive assembly of the present invention. Fig. 3 is a top view of the resilient mount of the preferred embodiment of the linear drive assembly of the present invention. Fig. 4 is a schematic view of the internal structure of the preferred embodiment of the linear driving assembly of the present invention. The structure of the elastic support in this embodiment is explained in detail:
the elastic support 1 is an integrated part formed by injection molding of high-elasticity and high-toughness engineering plastics, so that assembly errors caused by combination of multiple parts are avoided, the transmission precision of the linear driving assembly is improved, and the transmission performance of the linear driving assembly is consistent.
The first permanent magnet 3 of the present invention includes a first magnetic pole and a second magnetic pole which are adjacent and opposite, and the first cavity 12 includes a first driving position and a second driving position along the motion track of the long side of the elastic support 1. When the first cavity 12 is located at the first driving position, the distance between the single coil assembly 2 and the first magnetic pole is smaller than the distance between the single coil assembly 2 and the second magnetic pole; when the first cavity 12 is located at the second driving position, the distance between the single coil assembly 2 and the second magnetic pole is smaller than the distance between the single coil assembly 2 and the first magnetic pole.
The second permanent magnet 4 comprises a third magnetic pole and a fourth magnetic pole which are adjacent and opposite, the third magnetic pole is opposite to the first magnetic pole and has the same magnetic pole, the fourth magnetic pole is opposite to the second magnetic pole and has the same magnetic pole, and the second cavity 13 comprises a third driving position and a fourth driving position along the motion track of the long edge of the elastic support 1.
When the second cavity 13 is located at the third driving position, the distance between the single coil assembly 2 and the fourth magnetic pole is smaller than the distance between the single coil assembly 2 and the third magnetic pole. When the second cavity 13 is located at the fourth driving position, the distance between the single coil assembly 2 and the third magnetic pole is smaller than the distance between the single coil assembly 2 and the fourth magnetic pole.
When the first cavity 12 is located at the first driving position, the second cavity 13 is located at the third driving position; when the first chamber 12 is in the second drive position, the second chamber 13 is in the fourth drive position. The first cavity 12 and the second cavity 13 move towards each other, so that the stability of the whole structure of the linear driving assembly is improved.
In addition, when the elastic support 1 in this embodiment is in the initial state, the projection of the single coil assembly 2 on the first cavity 12 is located between two adjacent opposite magnetic poles in the first permanent magnet 3, and preferably, the projection of the single coil assembly 2 on the first cavity 13 is located at the center of two adjacent opposite magnetic poles in the second permanent magnet 4.
The structure of the first deforming part 14 in the present embodiment will be explained: the first deformation part 14 in this embodiment includes a first connection block 141 and a second connection block 142; the first connecting block 141 is disposed at one end of the first cavity 12, and one end of the fixing plate 11 is connected to the first cavity 12 through the first connecting block 141; the second connecting block 142 is disposed at one end of the second chamber 13, and the fixing plate 11 is connected to the second chamber 13 through the second connecting block 142, preferably, there is a gap between the first connecting block 141 and the second connecting block 142 in this embodiment. The connecting block of the first deformation part 14 of the elastic support 1 has an elastic supporting function and a vibration damping function, and ensures that the vibration of the motor is not transmitted to the shell of the electric appliance.
Further, in this embodiment, a first limiting groove 143 is disposed on a side of the first deformation portion 14 close to the fixing plate 11, a first limiting protrusion 111 is disposed on a side of the fixing plate 11 corresponding to the first limiting groove 143, the first limiting protrusion 111 is disposed in the first limiting groove 143, and the first limiting protrusion 111 is used for limiting a position of the first deformation portion 14. The stability of the structure of the elastic support 1 in the using process is improved.
The structure of the second deforming part 15 in the present embodiment will be explained: the second deformation part 15 in this embodiment includes a third connecting block 151 and a fourth connecting block 152; the third connecting block 151 is arranged at the other end of the first cavity 12, and one end of the fixing plate 11 is connected with the other end of the first cavity 12 through the third connecting block 151; the fourth connecting block 152 is disposed at the other end of the second cavity 13, and the fixing plate 11 is connected to the second cavity 13 through the fourth connecting block, preferably, a gap is formed between the third connecting block 151 and the fourth connecting block 152 in this embodiment. The two connecting blocks of the second deformation part 15 of the elastic bracket 1 have elastic supporting function and also have damping function, so that the vibration of the motor is not transmitted to the shell of the electric appliance.
Preferably, the second deformation part 15 in the present embodiment is provided with a second limiting groove 153 at a side close to the fixing plate 11, a second limiting protrusion 112 is provided at a position corresponding to the second limiting groove 153 at the side of the fixing plate 11, the second limiting protrusion 112 is provided in the second limiting groove 153, and the second limiting protrusion 112 is used for limiting the position of the second deformation part 15. The structural stability of the elastic support 1 in the use process is improved.
Referring to fig. 5, fig. 5 is a perspective view of a coil assembly of a preferred embodiment of the linear drive assembly of the present invention. The structure of the coil block 2 in the present embodiment will be explained in detail:
when n is greater than 1, the winding directions of the adjacent coil assemblies 2 are opposite. The distance between the centers of the adjacent coil assemblies 2 is equal to that between the centers of the adjacent permanent magnets, and the structural layout of the secondary coil assembly 2 improves the stability of the linear driving assembly in the use process.
In the present embodiment, the coil block 2 includes a bobbin 23 and a wire 21 wound around the bobbin 23; wherein, the framework 23 is internally provided with an iron core 22, and the iron core 22 is used for increasing the magnetic field intensity. The coil assembly 2 has a compact structural design, and the iron core 22 enhances the magnetic field intensity.
Referring to fig. 1 and 6, fig. 1 is a perspective view of a preferred embodiment of the linear drive assembly of the present invention, and fig. 6 is a perspective view of a spring plate of the preferred embodiment of the linear drive assembly of the present invention. Other structures of the linear driving assembly in the present embodiment will be explained in detail:
the linear driving assembly in this embodiment further includes a spring plate 5, the spring plate 5 is disposed in the elastic support 1 and connects the first deformation portion 14 and the second deformation portion 15, and the spring plate 5 is used for resetting the elastic support 1.
The spring plate 5 in this embodiment includes a first fixing portion 51, a second fixing portion 52, and an elastic portion 53; wherein the first fixing part 51 is arranged at one end of the spring piece 5, and the first fixing part 51 is fixedly connected with the first cavity 12; the second fixing part 52 is arranged at the other end of the spring piece 5 opposite to the first fixing part 51, and the second fixing part 52 is fixedly connected with the second cavity 13; the elastic portion 53 is disposed in the middle of the spring plate 5, the elastic portion 53 connects the first fixing portion 51 and the second fixing portion 52, and the elastic portion 53 is disposed at one end of the linear driving unit 2 arranged in the axial direction.
Preferably, the elastic portion 53 in this embodiment includes at least one elastic connecting section, and the elastic connecting section is in a "U" shape.
The spring piece 5 adopts a multi-U-shaped structure, so that the consistency of the air gaps of the linear driving assembly is ensured, namely the distances between the first permanent magnet 3 and the second permanent magnet 4 on the two sides of the linear driving assembly and the coil assembly 2 are equal, the uniformity of magnetic field force on the two sides of the linear driving assembly is ensured, and the balance of the opposite reciprocating motion of the first cavity 12 and the second cavity 13 is improved.
With reference to fig. 7 and 8, the first embodiment is a preferred embodiment of the present invention, and the operation principle of the motor using the linear driving assembly of the present invention is explained as follows:
the elastic support 1 is connected with the shaft assembly 8 through a first cavity 12 and connected with the vibrator assembly 9 through a second cavity 13. The number of the coil assemblies 2 in this embodiment is n, n is a positive integer, and may be 1, 2, 3, or …, and the number of permanent magnet poles in the two permanent magnets corresponding to the coil assemblies 2 is n +1, which are 2, 3, 4, or …, respectively. In this embodiment, the operation process of the linear driving assembly is described by taking 2 coil assemblies 2 as an example. The 2 coil components 2 in the present embodiment are a first coil component 2a disposed on the left side, and a second coil component 2b disposed on the right side, respectively. The winding direction of the first coil 21a in the first coil block 2a is opposite to the winding direction of the second coil 21b in the second coil block 2 b.
Taking the example that the first coil 21a in the first coil assembly 2a is wound clockwise, the second coil 21b in the second coil assembly 2b is wound counterclockwise, and the magnetic poles of the permanent magnet inside the motor are N, S, N poles from left to right.
First, when the coil assembly starts to input a pulse with a positive pulse voltage, as shown in fig. 9. The magnetic field generated at the upper end of the first iron core 22a is an N pole, and the magnetic field generated at the lower end is an S pole; the magnetic field generated at the upper end of the second core 22b is an S-pole, and the magnetic field generated at the lower end is an N-pole.
Due to the attraction of opposite magnetic poles and the repulsion of like magnetic poles, the repulsion force is generated between the upper ends of the first coil assembly 2a and the second coil assembly 2b and the left magnetic pole of the corresponding first permanent magnet 3, and the attraction force is generated between the right magnetic pole of the corresponding first permanent magnet 3.
Attraction force is generated between the lower ends of the first coil element 2a and the second coil element 2b and the left magnetic pole of the second permanent magnet 4, and repulsion force is generated between the right magnetic pole of the second permanent magnet 4. The elastic support 1 has elastic deformation capacity, and the first cavity 12 and the second cavity 13 which are used for fixing the two groups of permanent magnets move relatively at the moment, namely the first cavity 12 moves leftwards under the action of the magnetic field force, and the second cavity 13 moves rightwards under the action of the magnetic field force.
Meanwhile, the shaft assembly 8 moves leftwards as the shaft assembly 8 and the first permanent magnet 3 are fixedly connected through the first cavity 12 in the elastic bracket 1; since the vibrator assembly 9 and the second permanent magnet 4 are coupled and fixed by the second cavity 13 in the elastic bracket 1, the vibrator assembly 9 moves rightward. The vibrator assembly 9 moves towards the shaft assembly 8, thereby ensuring that the motor is balanced as a whole.
Secondly, after the coil assembly is positively pulsed, negative pulse voltage is input, as shown in fig. 10. The magnetic field generated at the upper end of the first iron core 22a is an S pole, and the magnetic field generated at the lower end is an N pole; the magnetic field generated at the upper end of the second core 22b is an N-pole, and the magnetic field generated at the lower end is an S-pole.
Since the opposite magnetic poles attract each other and the same magnetic poles repel each other, an attractive force is generated between the upper ends of the first coil element 2a and the second coil element 2b and the left magnetic pole of the corresponding first permanent magnet 3, and a repulsive force is generated between the right magnetic pole of the corresponding first permanent magnet 3.
The left magnetic poles between the lower ends of the first coil assembly 2a and the second coil assembly 2b and the corresponding second permanent magnets 4 generate repulsive force; and the right magnetic pole in the middle between the corresponding second permanent magnets 4 generates an attractive force. At this time, the first cavity 12 and the second cavity 13, which fix the two permanent magnets, move relatively, that is, the first cavity 12 moves rightwards under the action of the magnetic field force, and the second cavity 13 moves leftwards under the action of the magnetic field force.
Since the shaft assembly 8 and the first permanent magnet 3 are fixed therebetween by the first cavity 12 of the elastic bracket 1, the shaft assembly 8 moves rightward under these forces.
Meanwhile, since the vibrator assembly 9 and the second permanent magnet 4 are coupled and fixed by the second cavity 13 in the elastic bracket 1, the vibrator assembly 9 moves leftward by these forces. The vibrator assembly 9 is moved towards the shaft assembly 8 to ensure that the linear drive assembly is balanced as a whole.
According to the linear driving assembly, alternating pulse voltage is input, the winding 21 in the coil assembly 2 is electrified, so that the iron core 22 generates an alternating magnetic field, attraction/repulsion is generated between the upper end of the iron core 22 and the first permanent magnet 3 in an alternating mode, and repulsion/attraction is generated between the first permanent magnets 3 at the lower end of the iron core 22 in an alternating mode; so that the shaft assembly 8 and the vibrator assembly 9 reciprocate left and right by these forces.
The vibrator assembly 9 is continuously accelerated and decelerated during the reciprocating motion to generate vibration, and the vibration generated by the vibrator assembly 9 is transmitted to the shaft assembly 8 through the spring piece 5, so that the shaft assembly is driven to vibrate and reciprocate, and the shaft assembly can drive the electrical functional parts to vibrate and reciprocate.
This completes the operation of the motor of the preferred embodiment that utilizes the linear drive assembly.
Referring to fig. 11, fig. 11 is a schematic structural diagram of a linear driving assembly according to a second embodiment of the present invention. A second embodiment of the linear drive assembly of the present invention is as follows:
the structure of the resilient mount 6 in this embodiment is the same as that of the first embodiment of the linear drive assembly. The coil block 7 of the present embodiment is accommodated in the coil fitting cavity 66 of the elastic holder 6, and when n is greater than 1, and the winding directions of the adjacent coil blocks 7 are the same. The corresponding first permanent magnet 3a and the second permanent magnet 4a are also provided with n groups, and a plurality of groups of coil components 7 are arranged along the long edge direction of the elastic bracket; and the arrangement direction of the n groups of first permanent magnets 3a is parallel to the arrangement direction of the plurality of groups of coil assemblies 7, and the arrangement direction of the n groups of second permanent magnets 4a is parallel to the arrangement direction of the plurality of groups of coil assemblies 7.
The first permanent magnets 3a are arranged in the first cavity 62 of the elastic support 6, the first permanent magnets 3a include two permanent magnet poles with alternately different polarities, and the magnetic poles at two adjacent ends of adjacent first permanent magnets 3a are different.
The second permanent magnets 4a are arranged in the second cavity 63, each second permanent magnet 4a comprises two permanent magnet poles with alternately different polarities, and the magnetic poles at two adjacent ends of the adjacent second permanent magnets 4a are different; and the magnetic poles of the corresponding sides between the second permanent magnet 4a and the first permanent magnet 3a are like magnetic poles. The first permanent magnet 3a and the second permanent magnet 4a are respectively disposed at two sides of the coil assembly 7, and the number of poles of the permanent magnets in the first permanent magnet 3a and the second permanent magnet 4a is 2.
In the invention, the projection of a single coil assembly 7 on the first cavity 62 is positioned between two adjacent permanent magnet poles in the first permanent magnet 3 a; the projection of the single coil assembly 7 on the first cavity 62 is located between two adjacent permanent magnet poles in the second permanent magnet 4 a.
The operating principle of the second embodiment linear drive assembly is explained in detail as follows:
referring to fig. 11 and 12, in the present embodiment, the number of the coil assemblies 7 is n, n is a positive integer, and may be 1, 2, 3, or …, and the number of the first permanent magnets 3a and the second permanent magnets 4a corresponding to the coil assemblies is n +1, and is 2, 3, 4, or …, respectively. In this embodiment, the operation process of the motor is described by taking 2 coil assemblies 7 as an example. The 2 coil components 7 in the present embodiment are a first coil component 7a disposed on the left side, and a second coil component 7b disposed on the right side, respectively, as shown in fig. 12. The first coil 71a in the first coil block 7a is wound in the same direction as the second coil 71b in the second coil block 2 b.
Taking the first coil 71a of the first coil assembly 7a as an example, the second coil 71b of the second coil 2b is wound clockwise, and the magnetic poles of the two groups of first permanent magnets 3a and the two groups of second permanent magnets 4a in the inner permanent magnets of the linear driving assembly are N, S, N, S poles sequentially from left to right.
First, when the coil assembly starts to input a pulse with a positive pulse voltage, as shown in fig. 13. The magnetic field generated at the upper end of the first iron core 72a is an N pole, and the magnetic field generated at the lower end is an S pole; the magnetic field generated at the upper end of the second core 72b is an N-pole, and the magnetic field generated at the lower end is an S-pole.
Due to the attraction of the opposite magnetic poles and the repulsion of the same magnetic poles, a repulsive force is generated between the upper ends of the first coil element 7a and the second coil element 7b and the left magnetic poles of the two corresponding groups of first permanent magnets 3a, and an attractive force is generated between the right magnetic poles of the two corresponding groups of first permanent magnets 3 a.
Attraction force is generated between the lower ends of the first coil element 7a and the second coil element 7b and the left magnetic poles of the two groups of second permanent magnets 4a, and repulsion force is generated between the right magnetic poles of the corresponding two groups of second permanent magnets 4 a.
The elastic support 1 has elastic deformation capability, and at this time, the first cavity 62 for fixing the first permanent magnet 3a and the second cavity 63 for fixing the second permanent magnet 4a move relatively, that is, the first cavity 62 moves leftwards under the action of the magnetic field force, and the second cavity 63 moves rightwards under the action of the magnetic field force.
Second, when the coil assembly inputs the positive pulse voltage, the negative pulse voltage is input, as shown in fig. 14. The magnetic field generated by the upper end of the first iron core 3aa is an S pole, and the magnetic field generated by the lower end of the first iron core is an N pole; the magnetic field generated at the upper end of the second core 72b is an S-pole, and the magnetic field generated at the lower end is an N-pole.
Because the opposite magnetic poles attract each other and the same magnetic poles repel each other, an attractive force is generated between the upper ends of the first coil element 7a and the second coil element 7b and the left magnetic poles of the two corresponding groups of first permanent magnets 3a, and a repulsive force is generated between the left magnetic poles of the two corresponding groups of first permanent magnets 32.
Repulsive force is generated between the lower ends of the first coil element 7a and the second coil element 7b and the left magnetic poles of the two corresponding groups of second permanent magnets 4a, and attractive force is generated between the right magnetic poles of the two corresponding groups of second permanent magnets 4 a. The first chamber 62 is moved rightward by the magnetic field force and the second chamber 63 is moved leftward.
According to the linear driving assembly, alternating pulse voltage is input, a winding in the coil assembly is electrified, so that an iron core generates an alternating magnetic field, attraction/repulsion is generated between the upper end of the iron core and the first permanent magnet in an alternating mode, and repulsion/attraction is generated between the lower end of the iron core and the second permanent magnet in an alternating mode; so that the first cavity 62 and the second cavity 63 reciprocate leftwards and rightwards under the action of the forces, and the linear driving component can drive the electrical functional component to reciprocate in a vibration mode.
This completes the operation of the linear drive assembly in the present embodiment.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (7)
1. A linear drive assembly; it is characterized by comprising:
the elastic bracket comprises a fixed plate, a first cavity, a second cavity, a first deformation part and a second deformation part, wherein the fixed plate is arranged on an electrical product, the first cavity and the second cavity are oppositely arranged at two ends of the fixed plate, the two sides of the fixed plate are oppositely provided with the first deformation part and the second deformation part, the first deformation part is connected with one end of the first cavity and one end of the second cavity, the second deformation part connects the other end of the first cavity and the other end of the second cavity,
the first deformation part comprises a first connecting block and a second connecting block, the first connecting block is arranged at one end of the first cavity, and one end of the fixing plate is connected with the first cavity through the first connecting block; the second connecting block is arranged at one end of the second cavity, the fixing plate is connected with the second cavity through the second connecting block, a gap is arranged between the first connecting block and the second connecting block,
the second deformation part comprises a third connecting block and a fourth connecting block, the third connecting block is arranged at the other end of the first cavity, one end of the fixing plate is connected with the other end of the first cavity through the third connecting block, the fourth connecting block is arranged at the other end of the second cavity, the fixing plate is connected with the second cavity through the fourth connecting block, and a gap is reserved between the third connecting block and the fourth connecting block;
the coil assemblies are arranged in the coil assembly cavities, n coil assemblies are arranged along the axial direction of the elastic support, and n is a positive integer;
the first permanent magnet is arranged in the first cavity and is a multi-pole magnet with alternately different polarities;
the second permanent magnet is arranged in the second cavity, the second permanent magnet is a multi-pole magnet with alternately different polarities, and the magnetic poles of the corresponding side surfaces between the second permanent magnet and the first permanent magnet are like magnetic poles; and
the spring piece is arranged in the elastic support and is used for connecting the first deformation part and the second deformation part, and the spring piece is used for resetting the elastic support;
the first permanent magnet and the second permanent magnet are respectively oppositely arranged at two sides of the coil assembly, and the number of the permanent magnet poles of the first permanent magnet and the second permanent magnet is n + 1;
the projection of the single coil assembly on the first cavity is positioned between two adjacent pole numbers in the first permanent magnet;
the projection of the single coil assembly on the first cavity is positioned between two adjacent pole numbers in the second permanent magnet;
the coil assembly starts to input pulse voltage, and the first cavity for fixing the first permanent magnet and the second cavity for fixing the second permanent magnet move relatively, so that the stability of the overall structure of the linear driving assembly is improved; the spring plate includes:
the first fixing part is arranged at one end of the spring piece and is fixedly connected with the first cavity;
the second fixing part is arranged at the other end of the spring piece relative to the first fixing part and is fixedly connected with the second cavity; and
the elastic part is arranged in the middle of the spring piece and connects the first fixing part with the second fixing part, and the elastic part is arranged at one end of the arrangement direction of the coil assemblies;
the spring piece ensures that the air gaps of the linear driving assembly are consistent, the magnetic field force on two sides of the linear driving assembly is uniform, the balance of the first cavity and the second cavity which do opposite reciprocating motion is improved, the elastic part comprises at least one elastic connecting section, and the elastic connecting section is of a U-shaped structure.
2. The linear driving assembly as claimed in claim 1, wherein the first permanent magnet includes a first magnetic pole and a second magnetic pole which are adjacent and opposite, the first cavity includes a first driving position and a second driving position along the motion path of the long side of the elastic support,
when the first cavity is positioned at a first driving position, the distance between a single coil assembly and the first magnetic pole is smaller than the distance between a single coil assembly and the second magnetic pole,
when the first cavity is located at a second driving position, the distance between a single coil assembly and the second magnetic pole is smaller than the distance between a single coil assembly and the first magnetic pole;
the second permanent magnet comprises a third magnetic pole and a fourth magnetic pole which are adjacent and have opposite polarities, the third magnetic pole is opposite to the first magnetic pole in position and has the same magnetic pole property, the fourth magnetic pole is opposite to the second magnetic pole in position and has the same magnetic pole property, the second cavity comprises a third driving position and a fourth driving position along the motion track of the long edge of the elastic support,
when the second cavity is positioned at the third driving position, the distance between a single coil assembly and the fourth magnetic pole is smaller than the distance between a single coil assembly and the third magnetic pole,
when the second cavity is located at a fourth driving position, the distance between a single coil assembly and the third magnetic pole is smaller than the distance between a single coil assembly and the fourth magnetic pole;
when the first cavity is located at the first driving position, the second cavity is located at the third driving position; when the first cavity is in the second driving position, the second cavity is in the fourth driving position.
3. The linear drive assembly of claim 1, wherein the distance between adjacent permanent magnet pole count centers is equal to the distance between adjacent coil assembly centers.
4. The linear driving assembly according to claim 1, wherein a first limiting groove is disposed on a side of the first deformation portion close to the fixing plate, a first limiting protrusion is disposed on a side of the fixing plate corresponding to the first limiting groove, the first limiting protrusion is disposed in the first limiting groove, and the first limiting protrusion is used for limiting a position of the first deformation portion;
a second limiting groove is formed in one side, close to the fixing plate, of the second deformation part, a second limiting protrusion is arranged at the position, corresponding to the limiting groove, of one side of the fixing plate, the second limiting protrusion is arranged in the second limiting groove, and the second limiting protrusion is used for limiting the position of the second deformation part.
5. The linear drive assembly of claim 1, wherein when n is greater than 1, the winding directions of adjacent coil assemblies are opposite.
6. The linear drive assembly of claim 1 wherein the coil assembly includes a bobbin and a coil wound on the bobbin;
the iron core is arranged inside the framework and used for increasing the magnetic field intensity.
7. The linear drive assembly of claim 1, wherein when n is greater than 1, the winding directions of adjacent coil assemblies are the same;
the first permanent magnets and the second permanent magnets are respectively provided with n, and the arrangement directions of the n first permanent magnets and the n second permanent magnets are parallel to the arrangement directions of the n adjacent coil assemblies; wherein the single coil assembly corresponds to the single first permanent magnet and the single second permanent magnet one to one;
the first permanent magnet comprises two permanent magnet poles with alternately different polarities, and the magnetic poles at two adjacent ends of the adjacent first permanent magnets are different;
the second permanent magnet also comprises two permanent magnet poles with alternately different polarities, the magnetic poles at two adjacent ends of the adjacent second permanent magnets are different, and the magnetic poles at the corresponding side between the second permanent magnet and the first permanent magnet are same-polarity magnetic poles;
the projection of the single coil assembly on the first cavity is positioned between the adjacent two permanent magnet poles in the first permanent magnet;
the projection of the single coil assembly on the first cavity is positioned between the adjacent two permanent magnet poles in the second permanent magnet.
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| DE10242091A1 (en) * | 2002-09-11 | 2004-04-01 | Braun Gmbh | Small electrical device with a drive device for generating an oscillating movement |
| KR101109284B1 (en) * | 2009-11-02 | 2012-02-09 | 삼성전기주식회사 | A spring member of linear vibration motor |
| CN104600948A (en) * | 2015-01-27 | 2015-05-06 | 宁波赛嘉电器有限公司 | Motor |
| WO2021000093A1 (en) * | 2019-06-29 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Motor |
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| CN104660106A (en) * | 2015-02-02 | 2015-05-27 | 瑞声精密电子沭阳有限公司 | Flat linear vibration motor |
| CN207117451U (en) * | 2017-08-18 | 2018-03-16 | 高宇 | Linear motor |
| CN111865029A (en) * | 2019-04-30 | 2020-10-30 | 台睿精工股份有限公司 | Linear vibration actuating motor |
| CN110086313A (en) * | 2019-05-20 | 2019-08-02 | 领先科技(东台)有限公司 | A kind of linear vibration motor with S type spring leaf |
| CN210167934U (en) * | 2019-06-29 | 2020-03-20 | 瑞声科技(新加坡)有限公司 | Vibration motor |
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Address after: 518000 floor 1-5, building 3, No.42, Fuyuan 1st Road, Heping community, Fuhai street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen hongzhifa electromechanical Co.,Ltd. Address before: 518000 floor 1-5, building 3, No.42, Fuyuan 1st Road, Heping community, Fuhai street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN HONGZHIFA MACHINERY & ELECTRONICS CO.,LTD. |
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