CN114050016B - Solenoid actuator - Google Patents
Solenoid actuator Download PDFInfo
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- CN114050016B CN114050016B CN202111080259.8A CN202111080259A CN114050016B CN 114050016 B CN114050016 B CN 114050016B CN 202111080259 A CN202111080259 A CN 202111080259A CN 114050016 B CN114050016 B CN 114050016B
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- magnet assembly
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- solenoid actuator
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- 230000005672 electromagnetic field Effects 0.000 claims abstract description 30
- 230000000694 effects Effects 0.000 description 11
- 230000008901 benefit Effects 0.000 description 4
- 238000005381 potential energy Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005426 magnetic field effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
Abstract
The invention discloses a solenoid actuator, which comprises a shell, wherein a guide seat is arranged on the shell, a coil is arranged in the shell, a hollow channel is formed in the center of the coil, a mandrel is movably arranged in the hollow channel, and the mandrel can move along the axial direction of a first end part of the mandrel towards a second end part of the mandrel under the electromagnetic action generated by an electrified coil; the mandrel is provided with a first permanent magnet assembly, the magnetic field setting direction of the first permanent magnet assembly is consistent with the electromagnetic field direction generated after the coil is electrified, so that the thrust born by the mandrel during movement is increased, a second permanent magnet assembly is arranged at the position close to the first permanent magnet assembly, repulsive force is formed between the second permanent magnet assembly and the first permanent magnet assembly, and the direction of the repulsive force is the direction that the second end of the mandrel points to the first end of the mandrel, so that the mandrel automatically resets after the coil is powered off. The solenoid actuator can increase the thrust and the moving speed of the mandrel, the mandrel can be automatically reset, the working voltage and the working current of the coil are not additionally increased, and the solenoid actuator is energy-saving and environment-friendly.
Description
Technical Field
The invention relates to the field of electrical elements, in particular to a solenoid actuator.
Background
A solenoid actuator is an electric element including a coil and a movable spindle, and drives the spindle to move in the direction of a magnetic field by electromagnetic force generated by energizing the coil. Existing solenoid actuators typically attach a return spring to the spindle because the spindle, which has moved position, cannot automatically reset after the coil is de-energized. When the coil is electrified, the electromagnetic force drives the mandrel to move, and the mandrel compresses the spring, so that the spring stores elastic potential energy; when the coil is powered off, the spring stretches, elastic potential energy is released, and the mandrel is driven to reset together. The thrust of the movement of the mandrel is generally related to the magnitude of the coil energizing current and the number of windings, the larger the coil energizing current and the number of windings are, the stronger the magnetic field generated by the coil is, the larger the electromagnetic force is, and the larger the thrust of the mandrel is.
The conventional solenoid actuator can realize the moving and resetting effects of the mandrel, but still has the following problems: the electromagnetic force generated by energizing the coil not only pushes the mandrel to move, but also overcomes the resistance of the spring to the movement of the mandrel, so that the spring stores elastic potential energy, and the thrust force born by the mandrel is greatly reduced, namely the fixation strength of the mandrel is weakened, and the stability and reliability of the working state of the solenoid actuator are affected; by increasing the current or the winding number of the coil, the thrust and the moving speed of the mandrel can be improved, but the electric energy waste can be caused, the volumes of the coil and the solenoid actuator can be increased, and the optimization of the overall performance of the product is not facilitated.
Disclosure of Invention
The invention provides a solenoid actuator, which can automatically reset a mandrel and increase the thrust of the mandrel through arranging a permanent magnet assembly. The specific technical scheme is as follows:
a solenoid actuator comprises a shell, wherein a guide seat is arranged on the shell, a coil is arranged in the shell, a hollow channel is formed in the center of the coil, a mandrel is movably arranged in the hollow channel, and the mandrel can move along the axial direction of a first end part of the mandrel towards a second end part of the mandrel under the electromagnetic action generated by an electrified coil; the mandrel is provided with a first permanent magnet assembly, the magnetic field setting direction of the first permanent magnet assembly is consistent with the electromagnetic field direction generated after the coil is electrified, so that the thrust born by the mandrel during movement is increased, a second permanent magnet assembly is arranged at the position close to the first permanent magnet assembly, repulsive force is formed between the second permanent magnet assembly and the first permanent magnet assembly, and the direction of the repulsive force is the direction that the second end of the mandrel points to the first end of the mandrel, so that the mandrel automatically resets after the coil is powered off.
Further, the magnetic field setting direction of the second permanent magnet assembly is consistent with the electromagnetic field direction generated after the coil is electrified.
Further, the first permanent magnet assembly and the second permanent magnet assembly are arranged close to the coil, so that the magnetic field of the first permanent magnet assembly, the magnetic field of the second permanent magnet assembly and the electromagnetic field generated after the coil is electrified are overlapped with each other.
Further, in the axial direction of the mandrel, the distance between the first permanent magnet assembly and the second end of the mandrel is greater than the distance between the second permanent magnet assembly and the second end of the mandrel, so that the direction of the repulsive force generated by the second permanent magnet assembly on the first permanent magnet assembly is the direction pointing to the first end of the mandrel along the second end of the mandrel.
Further, the magnetic force of the first permanent magnet assembly is greater than the magnetic force of the second permanent magnet assembly.
Further, the thickness of the first permanent magnet assembly is greater than the thickness of the second permanent magnet assembly.
Further, the coil includes first end and second end, and the first end of coil is close to the first end setting of dabber, and the second end of coil is close to the second end setting of dabber, and first permanent magnet assembly is fixed to be set up on the first end of dabber, and the second permanent magnet assembly is close to the first end setting of coil.
Further, the second permanent magnet component is a hollow permanent magnet, the hollow permanent magnet is fixedly arranged at the position of the shell close to the first end part of the mandrel, and the hollow permanent magnet is arranged outside the mandrel and the first permanent magnet component in a surrounding manner.
Further, the first permanent magnet assembly comprises at least two permanent magnets, and the at least two permanent magnets are mutually overlapped along the axial direction of the mandrel.
Further, the second permanent magnet assembly comprises at least two permanent magnets, and the at least two permanent magnets are arranged in a rotationally symmetrical manner by taking the axis of the mandrel as a central line.
Further, the first end of the mandrel extends to the outside of the coil and the shell, so that the first permanent magnet assembly is positioned outside the shell; the second permanent magnet assembly is attached to the end face, close to the first end portion of the mandrel, of the shell and is located outside the shell.
The solenoid actuator of the present invention has the following advantages:
1. when the coil is electrified, the intensity of an electromagnetic field generated around the mandrel is increased, so that the thrust of the mandrel is increased, the moving speed is higher, and the working state of the solenoid actuator is more stable and reliable;
2. when the coil is powered off, the mandrel can be automatically reset, and the reset function does not influence the thrust and the speed when the mandrel moves;
3. on the premise of realizing the resetting effect of the mandrel and improving the thrust and the moving speed of the mandrel, the working voltage and the working current of the coil do not need to be additionally increased, and the device is energy-saving and environment-friendly.
Drawings
Fig. 1 is a cross-sectional view of a solenoid actuator of the present invention in a non-energized state.
Fig. 2 is a schematic diagram of the working principle of the first permanent magnet assembly and the second permanent magnet assembly in the present invention.
Fig. 3 is a cross-sectional view of the solenoid actuator of the present invention in an energized state.
Fig. 4 is a bottom view of a first embodiment of the solenoid actuator of the present invention.
Fig. 5 is a bottom view of a second embodiment of the solenoid actuator of the present invention.
Fig. 6 is a bottom view of a third embodiment of the solenoid actuator of the present invention.
Detailed Description
For a better understanding of the objects, structure and function of the present invention, a solenoid actuator according to the present invention will be described in further detail with reference to the accompanying drawings.
The solenoid actuator comprises a shell, wherein a guide seat is arranged on the shell, the guide seat and the shell jointly enclose a containing cavity, and an annular coil is arranged in the containing cavity. A hollow channel is formed at the central part of the annular coil, a columnar mandrel is movably arranged in the hollow channel, the first end part of the mandrel is far away from the guide seat, and the second end part of the mandrel is movably embedded in the guide seat; when the coil is electrified, an electromagnetic field can be generated, and the mandrel can move along the direction that the first end of the mandrel points to the second end of the mandrel in the axial direction of the mandrel under the action of the electromagnetic field; the guide holder can play a guiding role in the moving direction of the mandrel, and meanwhile, the guide holder and the shell can seal magnetic force generated after the coil is electrified in the accommodating cavity.
The mandrel is provided with a first permanent magnet assembly, a second permanent magnet assembly is further arranged at a position close to the first permanent magnet assembly, and the second permanent magnet assembly is fixed relative to the coil. The magnetic force generated by the first permanent magnetic assembly and the magnetic force generated by the second permanent magnetic assembly form repulsive force which can generate pushing force on the mandrel, and the direction of the pushing force is the direction that the second end of the mandrel points to the first end of the mandrel. When the coil is stopped, the electromagnetic force generated by the coil disappears, and the mandrel with the position moved can be reset under the thrust action formed by the repulsive force.
Preferably, the magnetic field direction of the first permanent magnet assembly is consistent with the electromagnetic field direction generated after the coil is electrified, the first permanent magnet assembly is close to the coil, the magnetic field of the first permanent magnet assembly can be mutually overlapped with the electromagnetic field generated after the coil is electrified, the strength of the magnetic field effect suffered by the mandrel is improved, and then the thrust suffered by the mandrel is increased and the moving speed is increased.
Preferably, the magnetic field direction of the second permanent magnet assembly is consistent with the electromagnetic field direction generated after the coil is electrified, the second permanent magnet assembly is arranged close to the coil and the first permanent magnet assembly, the magnetic field of the second permanent magnet assembly can be mutually overlapped with the electromagnetic field generated after the coil is electrified and the magnetic field of the first permanent magnet, the strength of the magnetic field effect suffered by the mandrel is further improved, and the thrust and the moving speed of the mandrel are increased.
Specifically, as shown in fig. 1, the solenoid actuator of the present invention includes a cylindrical housing 1, a housing chamber is formed inside the housing 1, a ring coil 2 is fixedly disposed in the housing chamber, and is disposed against an inner wall of the housing 1, and a mandrel 3 is of an elongated rod-like structure and is embedded in a hollow channel in a central portion of the coil 2. The mandrel 3 comprises a first end and a second end, the coil 2 comprises a first end and a second end, the first end of the coil 2 is arranged close to the first end of the mandrel 3, and the second end of the coil 2 is arranged close to the second end of the mandrel 3. When the coil 2 is energized, the electromagnetic force generated by the coil 2 can push the mandrel 3 to move in the hollow channel in a direction along the first end of the mandrel 3 toward the second end of the mandrel 3.
Further, a guide seat 4 is arranged at a position of the shell 1 close to the second end part of the mandrel 3, and the guide seat 4 is fixedly connected with the shell 1. The middle part of guide holder 4 is provided with annular boss, and the boss extends towards the direction that dabber 3 first end place was located and sets up. The center of the annular boss is provided with a hollow guide groove, the guide groove has a guide effect, and the second end of the mandrel 3 is embedded in the guide groove, so that the whole mandrel 3 can slide along the guide groove. The guide groove is provided with a first inclined plane, the first inclined plane is positioned on the end face, close to the first end part of the mandrel 3, of the guide groove, a second inclined plane is formed at the middle position of the mandrel 3 correspondingly, when the mandrel 3 slides along the guide groove, the first inclined plane and the second inclined plane can be mutually stopped, and further the moving distance of the mandrel 3 is limited, so that the extension length of the second end part of the mandrel 3 is controllable. The stop structure is formed by adopting the mode that the first inclined plane and the second inclined plane are matched with each other, so that the impact force between the mandrel 3 and the guide seat 4 can be buffered, and the guide effect of the guide seat 4 on the moving direction of the mandrel 3 is improved.
Of course, the structure of the mandrel 3 matched with the first inclined plane of the guide seat 4 can also be a circle of arc structure, or a plurality of tiny protruding structures are arranged on the second inclined plane, so that the contact area of the mandrel 3 and the first inclined plane is reduced on the basis of improving the buffering effect and the guiding effect, and the arrangement mode is more favorable for the mutual separation of the mandrel 3 and the guide seat 4, so that automatic resetting is realized.
Further, a first end of the mandrel 3 extends out of the first end of the coil 2 and the outside of the shell 1, a first permanent magnet assembly 5 is fixedly arranged on the first end of the mandrel 3, and the first permanent magnet assembly 5 is positioned outside the shell 1; the end face of the shell 1, which is close to the first end part of the mandrel 3, is provided with a second permanent magnet assembly 6, and the second permanent magnet assembly 6 is fixedly attached to the outer surface of the end face of the shell 1, so that the second permanent magnet assembly 6 is positioned outside the shell 1 and is close to the first end part of the coil 2 and the position where the first permanent magnet assembly 5 is located.
Further, as shown in fig. 2, a repulsive force of mutual repulsion is formed between the magnetic force generated by the first permanent magnet assembly 5 and the magnetic force generated by the second permanent magnet assembly 6, and the repulsive force can be converted into a thrust force to the mandrel 3, so that the mandrel 3 is driven to move along the thrust direction. In the axial direction of the mandrel 3, the distance between the first permanent magnet assembly 5 and the second end of the mandrel 3 is greater than the distance between the second permanent magnet assembly 6 and the second end of the mandrel 3, and this arrangement can ensure that the direction of the repulsive force generated by the second permanent magnet assembly 6 on the first permanent magnet assembly 5 is the direction along the second end of the mandrel 3 to the first end of the mandrel 3 when the coil is not energized, i.e. the direction of the thrust formed by the repulsive force is the direction along the second end of the mandrel 3 to the first end of the mandrel 3. After the coil 2 is electrified, the intensity of electromagnetic force generated near the mandrel 3 is larger than the intensity of repulsive force formed between the first permanent magnet assembly 5 and the second permanent magnet assembly 6, so that when the coil 2 is electrified, the mandrel 3 can move along the direction that the first end part points to the second end part, and when the coil 2 is powered off, the mandrel 3 can be automatically reset under the pushing of the repulsive force.
Further, as shown in fig. 3, the magnetic field direction of the first permanent magnet assembly 5 is consistent with the electromagnetic field direction generated after the coil 2 is energized, and since the first permanent magnet assembly 5 is disposed close to the coil 2, the magnetic field of the first permanent magnet assembly 5 can be mutually overlapped with the electromagnetic field generated after the coil 2 is energized. The magnetic field direction of the second permanent magnet assembly 6 is identical to the electromagnetic field direction generated after the coil 2 is electrified and is arranged close to the coil 2 and the first permanent magnet assembly 5, so that the magnetic field of the second permanent magnet assembly 6 can be mutually overlapped with the electromagnetic field generated by the first permanent magnet assembly 5 and the electrified coil 2. Compared with the acting force of the electromagnetic field of the coil 2, after the magnetic fields of the first permanent magnet assembly 5 and the second permanent magnet assembly 6 are overlapped with the electromagnetic field of the coil 2, the acting strength of the magnetic field borne by the mandrel 3 is obviously improved, so that the thrust borne by the mandrel 3 is increased, the moving speed is increased, the holding force of the mandrel 3 after moving is increased, and the working state of the solenoid actuator is more stable and reliable.
Preferably, the magnetic force of the first permanent magnet assembly 5 is greater than the magnetic force of the second permanent magnet assembly 6. In this arrangement, the enhancement of the electromagnetic field of the coil 2 by the first permanent magnet assembly 5 is greater than the repulsive interaction between the second permanent magnet assembly 6 and the first permanent magnet assembly 5. That is, when the coil 2 is energized, the magnetic field of the first permanent magnet assembly 5 generates a thrust force against the spindle 3 that is greater than the repulsive force between the second permanent magnet assembly 6 and the first permanent magnet assembly 5. That is, although a part of the electromagnetic field generated by the energizing coil 2 is required to overcome the repulsive force between the second permanent magnet assembly 6 and the first permanent magnet assembly 5, since the first permanent magnet assembly 5 has a stronger thrust force on the mandrel 3 when the coil 2 is energized, the mandrel 3 does not slow down or reduce the moving thrust force due to the repulsive force between the first permanent magnet assembly 5 and the second permanent magnet assembly 6, but rather, the effect of improving the thrust force and the moving speed of the mandrel 3 can be achieved under the condition that the current and the voltage are unchanged.
Preferably, the thickness of the first permanent magnet assembly 5 is greater than the thickness of the second permanent magnet assembly 6, i.e. the distance from the surface of the N-pole end of the first permanent magnet assembly 5 to the surface of the S-pole end is greater than the distance from the surface of the N-pole end of the second permanent magnet assembly 6 to the surface of the S-pole end. As shown in fig. 3, when the mandrel 3 is in an extended state under the action of an electromagnetic field, the first permanent magnet assembly 5 moves toward the inside of the housing 1; when moving to the extreme position, one end face of the first permanent magnet assembly 5 facing the second end of the mandrel 3 exceeds the end face of the second permanent magnet assembly 6 facing the second end of the mandrel 3, and the end face of the first permanent magnet assembly 5 facing away from the second end of the mandrel 3 also exceeds the end face of the second permanent magnet assembly 6 facing away from the second end of the mandrel 3 due to the large thickness of the first permanent magnet assembly 5.
By adopting the arrangement mode, on one hand, the mutual repulsion state between the first permanent magnet assembly 5 and the second permanent magnet assembly 6 can be ensured, and under the condition of power failure of a coil, the mandrel 3 can be automatically reset; on the other hand, when the coil is electrified, the first permanent magnet assembly 5 and the second permanent magnet assembly 6 are subjected to the electromagnetic field action from the coil 2, the first permanent magnet assembly 5 moves along with the spindle 3 towards the direction of the second permanent magnet assembly 6, and when the magnetic force line of the first permanent magnet assembly 5 passes through the magnetic field center line of the second permanent magnet assembly 6, the repulsive force between the first permanent magnet assembly 5 and the second permanent magnet assembly 6 is converted into attractive force, so that the spindle 3 is attracted to move in the extending direction, and the thrust of the spindle 3 is further enhanced. When the coil 2 is de-energized again, the electromagnetic field generated by the coil disappears, and the first permanent magnet assembly 5 and the second permanent magnet assembly 6 are restored to the state of generating repulsive force between each other, so that the mandrel 3 is driven to reset automatically.
Preferably, as shown in fig. 4, the second permanent magnet assembly 6 is a hollow permanent magnet, the central part of the hollow permanent magnet is formed with a hollow structure, the hollow permanent magnet is fixedly arranged at a position of the shell 1 close to the first end of the mandrel 3, and the hollow permanent magnet is circumferentially arranged outside the mandrel 3 and the first permanent magnet assembly 5, i.e. the mandrel 3 is positioned in the hollow structure of the central part of the hollow permanent magnet. By adopting the arrangement mode, the action effect between the first permanent magnet assembly 5 and the second permanent magnet assembly 6 can be improved to the greatest extent, and the stability of the action effect is improved. The hollow permanent magnet is preferably a circular ring-shaped permanent magnet to match the shape of the bottom end face of the housing 1, and may be an elliptical ring shape, a rectangular shape, or other shapes.
The second permanent magnet assembly 6 is preferably formed by an integrally formed hollow permanent magnet, or the second permanent magnet assembly 6 may be formed by overlapping two or more hollow permanent magnets with each other along the axial direction of the mandrel. Of course, the second permanent magnet assembly 6 may also be composed of at least two permanent magnets, where the at least two permanent magnets are rotationally symmetrically arranged with the axis of the mandrel 3 as the center line, so as to interact with the first permanent magnet assembly 5 to achieve the effect of automatic resetting of the mandrel 3. For example, as shown in fig. 5 and 6, the second permanent magnet assembly 6 includes 4 cylindrical permanent magnets, and the 4 permanent magnets are rotationally symmetrically arranged with the axis of the mandrel 3 as a center line; alternatively, the second permanent magnet assembly 6 includes 2 bar-shaped or arc-shaped permanent magnets, and the 2 permanent magnets are rotationally symmetrically arranged with the axis of the mandrel 3 as a center line. The magnitude of the magnetic force of the second permanent magnet assembly 6 can be adjusted by increasing or decreasing the number of superimposed permanent magnets in the second permanent magnet assembly 6, or by adjusting the number of permanent magnets arranged around the spindle.
The first permanent magnet assembly 5 is preferably formed by an integrally formed cylindrical permanent magnet, the outer diameter of which is preferably the same as the outer diameter of the spindle, fixedly arranged at the first end of the spindle. Alternatively, the first permanent magnet assembly 5 may be formed by two or more permanent magnets that are disposed overlapping each other along the axial direction of the mandrel. This arrangement allows the magnitude of the magnetic force of the first permanent magnet assembly 5 to be adjusted by increasing or decreasing the number of overlapping permanent magnets.
Further, the first permanent magnet assembly 5 and the second permanent magnet assembly 6 may be arranged in other ways than the preferred arrangement described above, for example: the second permanent magnet assembly 6 may also be disposed in a middle position of the housing 1 or a position of the housing 1 near the second end of the mandrel 3, so long as a repulsive force for resetting the mandrel 3 can be generated between the second permanent magnet assembly and the first permanent magnet assembly 5; alternatively, the second permanent magnet assembly 6 may be disposed inside the housing 1, for example, fixedly connected to an inner wall at an end of the housing 1, or fixedly connected to an inner wall in a middle of the housing 1; alternatively, the first permanent magnet assembly 5 may be disposed at a middle position of the mandrel 3, and the fixed position of the second permanent magnet assembly 6 is correspondingly closer to the second end of the mandrel 3 than the position of the first permanent magnet assembly 5, so as to ensure that the direction of the repulsive force generated by the repulsive force on the mandrel 3 can cause the mandrel 3 to automatically reset.
The operation of the solenoid actuator of the present invention will be briefly described with reference to fig. 2 and 3. As shown in fig. 2, when the coil 2 is not energized, the mandrel 3 remains stationary in the retracted position under the repulsive force generated between the first permanent magnet assembly 5 and the second permanent magnet assembly 6; when the coil 2 is electrified, as shown in fig. 3, an electromagnetic field is generated around the coil 2, and the magnetic field of the first permanent magnet assembly 5 and the electromagnetic field of the coil 2 are overlapped with each other, so that the mandrel 3 is accelerated to move and stretch out, and the thrust of the mandrel 3 is improved; when the coil 2 is powered off again, the electromagnetic field disappears, the superposition effect of the magnetic field and the electromagnetic field of the first permanent magnet assembly 5 also disappears at the same time, and the mandrel 3 can automatically reset under the repulsive force between the first permanent magnet assembly 5 and the second permanent magnet assembly 6.
The solenoid actuator of the present invention has the following advantages:
1. when the coil is electrified, the intensity of an electromagnetic field generated around the mandrel is increased, so that the thrust of the mandrel is increased, the moving speed is higher, and the working state of the solenoid actuator is more stable and reliable;
2. when the coil is powered off, the mandrel can be automatically reset, and the reset function does not influence the thrust and the speed when the mandrel moves;
3. on the premise of realizing the resetting effect of the mandrel and improving the thrust and the moving speed of the mandrel, the working voltage and the working current of the coil do not need to be additionally increased, and the device is energy-saving and environment-friendly.
The invention has been further described with reference to specific embodiments, but it should be understood that the detailed description is not to be construed as limiting the spirit and scope of the invention, but rather as providing those skilled in the art with the benefit of this disclosure with the benefit of their various modifications to the described embodiments.
Claims (9)
1. The solenoid actuator is characterized by comprising a shell, wherein a guide seat is arranged on the shell, a coil is arranged in the shell, a hollow channel is formed in the center of the coil, a mandrel is movably arranged in the hollow channel, and the mandrel can move along the axial direction of a first end part of the mandrel towards a second end part of the mandrel under the electromagnetic action generated by an electrified coil; the mandrel is provided with a first permanent magnet assembly, the magnetic field setting direction of the first permanent magnet assembly is consistent with the electromagnetic field direction generated after the coil is electrified so as to increase the thrust force born by the mandrel when the mandrel moves, a second permanent magnet assembly is arranged at the position close to the first permanent magnet assembly, repulsive force is formed between the second permanent magnet assembly and the first permanent magnet assembly, and the direction of the repulsive force is the direction that the second end of the mandrel points to the first end of the mandrel so as to promote the mandrel to automatically reset after the coil is powered off;
the magnetic field setting direction of the second permanent magnet assembly is consistent with the electromagnetic field direction generated after the coil is electrified;
in the axial direction of the mandrel, the distance between the first permanent magnet assembly and the second end of the mandrel is larger than the distance between the second permanent magnet assembly and the second end of the mandrel, so that the direction of the repulsive force generated by the second permanent magnet assembly on the first permanent magnet assembly is the direction pointing to the first end of the mandrel along the second end of the mandrel.
2. The solenoid actuator of claim 1, wherein the first permanent magnet assembly and the second permanent magnet assembly are positioned adjacent the coil such that the magnetic field of the first permanent magnet assembly and the magnetic field of the second permanent magnet assembly overlap with the electromagnetic field generated by energizing the coil.
3. The solenoid actuator of claim 1, wherein the magnetic force of the first permanent magnet assembly is greater than the magnetic force of the second permanent magnet assembly.
4. The solenoid actuator of claim 1, wherein the thickness of the first permanent magnet assembly is greater than the thickness of the second permanent magnet assembly.
5. The solenoid actuator of any one of claims 1-4, wherein the coil comprises a first end and a second end, the first end of the coil being disposed proximate the first end of the mandrel, the second end of the coil being disposed proximate the second end of the mandrel, the first permanent magnet assembly being fixedly disposed on the first end of the mandrel, the second permanent magnet assembly being disposed proximate the first end of the coil.
6. The solenoid actuator of claim 5 wherein the second permanent magnet assembly is a hollow permanent magnet fixedly disposed on the housing adjacent the first end of the spindle and the hollow permanent magnet is disposed around the spindle and the exterior of the first permanent magnet assembly.
7. The solenoid actuator of claim 5 wherein the second permanent magnet assembly comprises at least two permanent magnets rotationally symmetrically disposed about the axis of the mandrel.
8. The solenoid actuator of claim 5, wherein the first permanent magnet assembly comprises at least two permanent magnets disposed overlapping each other in an axial direction of the spindle.
9. The solenoid actuator of claim 5, wherein the first end of the mandrel extends to an exterior of the coil and the housing such that the first permanent magnet assembly is located outside the housing; the second permanent magnet assembly is attached to the end face, close to the first end portion of the mandrel, of the shell and is located outside the shell.
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| CN202111080259.8A CN114050016B (en) | 2021-09-15 | 2021-09-15 | Solenoid actuator |
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| CN202111080259.8A CN114050016B (en) | 2021-09-15 | 2021-09-15 | Solenoid actuator |
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| CN114050016A CN114050016A (en) | 2022-02-15 |
| CN114050016B true CN114050016B (en) | 2024-03-29 |
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