CN116721898A

CN116721898A - Electromagnetic rotary driver

Info

Publication number: CN116721898A
Application number: CN202211187473.8A
Authority: CN
Inventors: 申军
Original assignee: Magvention Suzhou Ltd
Current assignee: Magvention Suzhou Ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-09-08

Abstract

The invention discloses an electromagnetic rotary driver, which comprises a rotary shaft assembly, wherein the rotary shaft assembly comprises a rotary shaft, a first armature is arranged above the rotary shaft, a first permanent magnet is fixed at the tail end of the first armature, a stop arm is arranged below the rotary shaft, a first stop wall is arranged on one side of the stop arm, a second stop wall is arranged on the other side of the stop arm, and a first electromagnet is arranged on one side of the rotary shaft, and a second electromagnet is arranged on the other side of the rotary shaft. The electromagnetic rotary driver has the advantages of simple structure, easy manufacture, high efficiency and performance and reduced cost.

Description

Electromagnetic rotary driver

Technical Field

The invention relates to the technical field of electronic parts, in particular to an electromagnetic rotary driver.

Background

An electromagnetic actuator is an electric control device, and is an electric appliance that causes a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount reaches a prescribed requirement. It has an interactive relationship between the control system and the controlled system. It is commonly used in automated control circuits and is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, the circuit plays roles of automatic regulation, safety protection, circuit switching and the like. Existing electromagnetic rotary drives typically include a magnetic rotary element (rotor) surrounded by an electromagnetic stator element. When energized, the electromagnetic stator produces attractive or repulsive magnetic forces on the rotor and produces torque that causes the rotor to rotate.

Because of various technical limitations, the existing electromagnetic driver is generally complex in structure, does not utilize manufacturing, is poor in efficiency and reliability, and increases the use cost.

Disclosure of Invention

The invention aims to provide an electromagnetic rotary driver, which solves a plurality of defects of the electromagnetic rotary driver on the market, is simple in structure, simple to manufacture, high in efficiency and reliability and provided with an external rotary handle.

In order to achieve the above purpose, the present invention provides the following technical solutions: the electromagnetic rotary driver is characterized by comprising a rotary shaft assembly, wherein the rotary shaft assembly comprises a rotary shaft, a first armature is arranged above the rotary shaft, a first permanent magnet is fixed at the tail end of the first armature, a stop arm is arranged below the rotary shaft, a first stop wall is arranged on one side of the stop arm, a second stop wall is arranged on the other side of the stop arm, a first electromagnet is arranged on one side of the rotary shaft, a second electromagnet is arranged on the other side of the rotary shaft, and the first electromagnet and the second electromagnet form an electromagnet assembly.

Preferably, a second armature is further arranged on the rotating shaft, a second permanent magnet is arranged at the tail end of the second armature, and the first electromagnet and the second electromagnet are arranged between the first permanent magnet and the second permanent magnet.

Preferably, the magnetic field components of the first permanent magnet and the second permanent magnet are the same.

Preferably, the first electromagnet and the second electromagnet each comprise an iron core and a coil wound on the iron core.

Preferably, the first permanent magnet is magnetized perpendicularly in the direction of the rotation axis.

Preferably, the first permanent magnet and the second permanent magnet are magnetized in the same direction and have aligned magnetization directions.

Preferably, the first armature is further provided with a third permanent magnet, the electromagnetic rotary driver further comprises a housing, a cover plate is arranged above the housing, a bearing is arranged at the cover plate, the rotating shaft is arranged in the bearing, the top of the rotating shaft is provided with a rotary handle and is located outside the bearing and the cover plate, and a fourth permanent magnet is arranged at the tail end of the rotary handle.

Preferably, the third permanent magnet is arranged on the first armature, the fourth permanent magnet is positioned at the lower end of the rotating handle, and the third permanent magnet and the fourth permanent magnet are magnetized in the same direction.

Preferably, the rotary handle rotates in a synchronized manner with the rotary shaft assembly.

Compared with the prior art, the invention has the beneficial effects that: the electromagnetic rotary driver:

1. when the electromagnet and not energized, the first and second permanent magnets are attracted to the core of the first electromagnet, which produces a clockwise torque (viewed from the top) on the rotating shaft assembly and rotates it clockwise until its stopping arm is stopped by the first stopping wall and locked into the first position (as shown in fig. 1). In this first position and when the first electromagnet is energized to generate a repulsive force on the first and second permanent magnets and on the rotating shaft assembly, a counterclockwise torque is generated on the rotating shaft assembly, rotating it counterclockwise until its stopping arm is stopped by the second stopping wall and locked to the second position (not shown). In the second position, the first and second permanent magnets and the core attracted to the second electromagnet, and the rotating shaft assembly is locked and held stable without energizing the electromagnets. Likewise, the rotating shaft assembly can be switched from the second position to the first position by energizing the second electromagnet, so that the structure is simple, the manufacturing is convenient, the control is convenient, and the working efficiency is improved.

The distance from the first permanent magnet to the electromagnet assembly is approximately the same as the distance from the second permanent magnet to the electromagnet assembly, and the magnetic force generated by the magnetic field of the electromagnet assembly and the first permanent magnet acting on the first electric drive and the component of the magnetic force generated by the magnetic field of the electromagnet assembly and the second permanent magnet acting on the second electric drive in the direction of the realignment (i.e. along the axial direction of the rotating shaft 111) cancel each other. The torque generated by the magnetic field of the electromagnet assembly and the first permanent magnet acting on the first electric drive is in the same direction as the torque generated by the magnetic field of the electromagnet assembly and the second permanent magnet acting on the second electric drive, so that the acting force on the rotating assembly is larger, the operating efficiency of the rotating assembly is high, and the energy loss is reduced.

2. The outside is provided with the twist grip, and its end is provided with fourth permanent magnet. A third permanent magnet is added to the top end of the armature. The outer rotating handle is mounted outside the bearing cap and is freely rotatable about the axis of the rotating shaft. The permanent magnets and magnetization in the perpendicular direction have aligned polarization directions (e.g., north poles pointing upward) such that they are magnetically attracted to each other. Due to this magnetic attraction (coupling), the external rotary handle and the rotary shaft assembly are rotated in a synchronized manner, enabling external manual control of the rotary actuator. Thus, the electromagnetic rotary driver can be controlled electrically and manually, and the performance of the electromagnetic rotary driver is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic view of the structure of the rotary handle in the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, 2 and 3, the present invention provides a technical solution: an electromagnetic rotary actuator 100 comprises a rotary shaft assembly 110 and first and second electromagnets 130a and 130b, respectively, wherein the rotary shaft assembly 110 further comprises a rotary shaft 111, a first armature 112a having a first permanent magnet 10a and a second armature 112b fixed to its ends and a second permanent magnet 10b fixed to its ends. The first electromagnet 130a includes a core 131a and a coil 132a, and the second electromagnet 130b includes a core 131b and a coil 132b. Electromagnets 130a and 130b are preferably placed between said first permanent magnet 10a and said second permanent magnet 10b. The rotating shaft 111, the first and second armatures 112a and 112b, and the magnetic cores 130a and 131b are preferably made of a soft magnetic material such as iron or NiFe alloy or the like. The permanent magnets 10a and 10b are preferably made of neodymium iron boron, samarium cobalt or other suitable permanent magnet materials. The armatures 112a and 112b are rigidly fixed to the rotary shaft 111. The rotary shaft assembly 110 is mounted on the bearing 30 and is freely rotatable about the axis of the rotary shaft 111. The permanent magnets 10a and 10b are preferably magnetized in a vertical direction and aligned in the polarization direction (e.g., north pole pointing upward). The first and second electromagnets 130a and 130b are mounted on the fixed structural frame 40 and remain stationary. The stopper arm 113 is also fixed to the rotation shaft 111, and its rotation is limited to an area surrounded by stopper walls 114 and 115. The rotating shaft assembly 110 and the electromagnets 130a and 130b are suitably mounted within the housing 60 and sealed by the cover 70. The electrical connector receptacle 80 may be mounted on top or side as appropriate to provide electrical connection to the electromagnet and other optional electronic circuitry.

The distance from the first permanent magnet 10a to the electromagnet assembly is approximately the same as the distance from the second permanent magnet 10b to the electromagnet assembly, the magnetic force generated by the magnetic field of the electromagnet assembly and the first permanent magnet 10a acting on the first electric drive 112a and the component of the magnetic force generated by the magnetic field of the electromagnet assembly and the second permanent magnet 10b acting on the second electric drive in the heavy straight direction (i.e. along the axial direction of the rotating shaft 111) cancel each other, and the torque generated by the magnetic field of the electromagnet assembly and the first permanent magnet 10a acting on the first electric drive 112a and the torque generated by the magnetic field of the electromagnet assembly and the second permanent magnet 10b acting on the second electric drive 112b are the same, so that the acting force on the rotating assembly 110 is larger, the operating efficiency of the rotating assembly 110 is provided, and the loss of energy is reduced.

When the electromagnets 130a and 130b are not energized, the first and second permanent magnets 10a and 10b are attracted to the core 131a of the first electromagnet, which generates a clockwise torque (as viewed from the top) on the rotating shaft assembly 110 and rotates it clockwise until its stopping arm 113 is stopped by the first stopping wall 114 and locked into the first position (as shown in fig. 1). In this first position and when the first electromagnet 130a is energized to generate a repulsive force on the first and second permanent magnets 10a and 10b, a counterclockwise torque is generated on the rotating shaft assembly 110, causing it to rotate counterclockwise until its stop arm 113 is stopped by the second stop wall 115 and locked to a second position (not shown). In the second position, the first and second permanent magnets 10a and 10b are attracted to the magnetic core 131b of the second electromagnet 130b, and the rotating shaft assembly 110 is locked and held stable from energizing the electromagnets. Likewise, the rotating shaft assembly 110 may be switched from the second position back to the first position by energizing the second electromagnet 130 b.

Further, an external rotary handle 140 may be optionally added, which further includes a fourth permanent magnet 141 attached to its distal end. Accordingly, a third permanent magnet 10c is added to the top end of the armature 112 a. The third and fourth permanent magnets are preferably made of neodymium-iron-boron, samarium-cobalt or other suitable permanent magnet materials. The armature 140 is preferably made of a soft magnetic material (e.g., iron) and is mounted on the exterior of the cover 70 of the bearing 30 and is free to rotate about the axis of the shaft 111. The permanent magnets 10c and 141 are preferably magnetized in a perpendicular direction with the polarization directions aligned (e.g., north poles pointing upward) so that they are magnetically attracted to each other. Due to this magnetic attraction (coupling), the external rotary handle 140 and the rotary shaft assembly 110 rotate in a synchronized manner, enabling external manual control of the rotary actuator 100.

If necessary, more armature-like components with permanent magnets can be added to the rotary shaft assembly and paired with additional electromagnets to increase the rotational torque of the rotary drive.

Other mechanical or electronic components may be added to the inside or outside of the housing 60 of the rotary drive 100, and appropriate linkage of the rotary shaft 111 with these components allows the rotary drive 110 to perform various position control functions. The rotary drive may be manufactured using a variety of methods. A detailed description of various possible manufacturing methods is omitted herein for brevity.

What is not described in detail in this specification is prior art known to those skilled in the art.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. The utility model provides an electromagnetic rotary driver, its characterized in that includes rotation axis subassembly (110) and electro-magnet subassembly, electro-magnet subassembly includes first electro-magnet (130 a) and second electro-magnet (130 b), rotation axis subassembly (110) are including rotation axis (111), rotation axis (111) top is provided with first armature (112 a), the end of first armature (112 a) is fixed with first permanent magnet (10 a), the below of rotation axis (111) is provided with stop arm (113), one side of stop arm (113) is provided with first stop wall (114), the opposite side is provided with second stop wall (115), first electro-magnet (130 a) and second electro-magnet (130 b) are located respectively the both sides of rotation axis (111), still be provided with second armature (112 b) on rotation axis (111), the end of second armature (112 b) is provided with second permanent magnet (10 b), first electro-magnet (130 a) and second electro-magnet (130 b) set up between first permanent magnet (10 a) and second permanent magnet (10 b).

2. The electromagnetic rotary drive according to claim 1, wherein the first permanent magnet (10 a) is magnetized perpendicularly in the direction of the rotation axis (111); the second permanent magnet (10 b) is magnetized in the same direction as the first permanent magnet (10 a) and has aligned magnetization directions.

3. The electromagnetic rotary drive of claim 1, wherein the torque generated by the interaction of the electromagnet assembly and the magnetic field of the first permanent magnet (10 a) on the first electric drive (112 a) is in the same direction as the torque generated by the interaction of the electromagnet assembly and the magnetic field of the second permanent magnet (10 b) on the second electric drive (112 b).

4. The electromagnetic rotary actuator of claim 1, wherein a component of a magnetic force generated by a magnetic field interaction of the electromagnet assembly and the first permanent magnet (10 a) on the first electric drive (112 a) and a component of a magnetic force generated by a magnetic field interaction of the electromagnet assembly and the second permanent magnet (10 b) on the second electric drive (112 b) in a vertical direction (i.e., along an axial direction of the rotary shaft 111) cancel each other.

5. The electromagnetic rotary drive of claim 1, wherein the first electromagnet (130 a) and the second electromagnet (130 b) each comprise a core (131 a, 131 b) and a coil (132 a, 132 b) wound around the core (131 a, 131 b).

6. The electromagnetic rotary driver according to claim 1, wherein the first armature (112 a) is further provided with a third permanent magnet (10 c), the electromagnetic rotary driver further comprises a housing (60), a cover plate (70) is arranged above the housing (60), a bearing (30) is arranged at the cover plate (70), the rotating shaft (111) is arranged on the bearing (30), a rotating handle (140) is arranged at the top of the rotating shaft (111) and is positioned outside the bearing (30) and the cover plate (70), and a fourth permanent magnet (141) is arranged at the tail end of the rotating handle (140).

7. The electromagnetic rotary actuator according to claim 1 or 6, wherein the third permanent magnet (10 c) is disposed at an upper end of the first armature (112 a), the fourth permanent magnet (141) is disposed at a lower end of the rotary handle (140), and the third permanent magnet (10 c) is magnetized in the same direction as the fourth permanent magnet (141).

8. The electromagnetic rotary drive of claim 6, wherein the rotary handle (140) rotates in a synchronized manner with the rotary shaft assembly (110).