A moving-coil high-frequency switching electromagnetic drive device

Abstract

The application provides a moving-coil high-frequency switch electromagnetic driving device, which comprises a coil assembly, a magnetic isolation base, a left permanent magnet, a right permanent magnet, rolling support balls and a magnetic isolation end cover. The coil assembly comprises a coil framework and a coil wound on the coil framework. The coil framework is fixed on a fixed framework by a thermoplastic form. The magnetic isolation end cover is sleeved on the front end of the fixed framework. The rear end of the fixed framework is inserted with the magnetic isolation base. A plurality of rolling support balls are arranged between the magnetic isolation base and the fixed framework. The left permanent magnet is sleeved on the fixed framework between the magnetic isolation end cover and the coil framework. The right permanent magnet is sleeved on the magnetic isolation base between the magnetic isolation base and the coil framework. The left and right position outputs of the coil assembly are realized by changing the current direction of the coil. The force output of the coil assembly is realized by changing the current size of the coil. The rolling support balls are used, so that the friction is reduced and the dynamic performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic drive device, especially a moving coil type high-frequency switch electromagnetic drive device. BACKGROUND

[0002] The electromagnetic drive device is a device for converting electric signal into force or displacement output, which follows the magnetoresistance theory and converts the distribution of magnetic field into the mutual attraction of soft magnetic material.

[0003] The current switch electromagnet used in the field of hydraulic components is mostly of basin type pole shoe and armature structure, which is simple in structure but has obvious defects, that is, the dynamic response is not high enough, and the structure is complex when multiple stations are needed to increase the coil. SUMMARY

[0004] In view of the defects of the prior art, the present application provides a moving coil type high-frequency switch electromagnetic drive device, the direction of the current of the coil can change to realize the reverse position output of the coil assembly, the size of the current of the coil can be changed to realize the force output of the coil assembly, and different power requirements can be realized.

[0005] The technical scheme of the present application is as follows: a moving coil type high-frequency switch electromagnetic drive device, comprising a coil assembly, a magnetic isolation base, a left permanent magnet, a right permanent magnet, a rolling support ball and a magnetic isolation end cover, the coil assembly comprises a coil skeleton and a coil wound on the coil skeleton, the coil skeleton is fixed on a fixed skeleton by a thermoplastic form;

[0006] The magnetic isolation end cover is sleeved on the front end of the fixed skeleton, the magnetic isolation base is inserted into the rear end of the fixed skeleton, and a plurality of rolling support balls are arranged between the magnetic isolation base and the fixed skeleton;

[0007] The left permanent magnet is sleeved on the fixed skeleton between the magnetic isolation end cover and the coil skeleton, the right permanent magnet is sleeved on the magnetic isolation base between the magnetic isolation base and the coil skeleton, the left centering spring is connected between the left permanent magnet and the coil skeleton, and the right centering spring is connected between the right permanent magnet and the coil skeleton.

[0008] Preferably, a group of axial through holes and a center mounting hole are formed in the front end of the fixed skeleton, and different execution mechanisms can be connected through the center mounting hole.

[0009] Preferably, the fixed skeleton is a conical structure, and the fixed skeleton is made of a non-magnetic metal material.

[0010] Preferably, a magnetic isolation shell is sleeved outside the coil, and the shell covers the left permanent magnet and the right permanent magnet.

[0011] Preferably, the magnetic isolation end cover is connected to the magnetic isolation shell by interference or screw sealing.

[0012] Preferably, the magnetic isolation base has a T-shaped cross section, and a support sleeve is extended from one end of the magnetic isolation base, and the support sleeve is provided with fixing holes for fixing the rolling support balls and oil flow holes.

[0013] Preferably, the inner side surface of the fixing framework is in contact with the rolling support balls to form a rolling structure.

[0014] Preferably, the left permanent magnet and the right permanent magnet are installed in a same-name opposite manner and are in contact with the inner wall of the magnetic isolation shell.

[0015] Preferably, the left centering spring and the right centering spring have a butterfly spring structure and are respectively matched with the left and right end surfaces of the fixing framework to keep the coil assembly between the left permanent magnet and the right permanent magnet.

[0016] Preferably, the coil is wound in the coil framework wire slot according to a fixed rotation direction, the reverse position output of the coil assembly is changed by changing the current direction of the coil, and the force output of the coil assembly is changed by changing the current size of the coil.

[0017] The present application has the following advantages:

[0018] 1. The present application realizes the left and right position outputs of the coil assembly by changing the current direction of the coil, and realizes the force output of the coil assembly by changing the current size of the coil.

[0019] 2. The present application can reduce friction and improve dynamic performance by using the rolling support balls. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Fig. 1 is a structural schematic diagram of the device of the present application;

[0021] Figure 2 Fig. 2 is a cross-sectional schematic diagram of the device of the present application;

[0022] Figure 3 Fig. 3 is a structural schematic diagram of the device of the present application after hiding the magnetic isolation shell;

[0023] Figure 4 Fig. 4 is a structural schematic diagram of the device of the present application after hiding the coil;

[0024] Figure 5 Fig. 5 is a structural schematic diagram of the device of the present application after hiding the coil framework;

[0025] Figure 6 Fig. 6 is a structural schematic diagram of the fixing framework of the device of the present application;

[0026] Figure 7 This is a schematic diagram of the structure of the magnetic shielding base of the present invention;

[0027] Figure 8 This is a schematic diagram illustrating the working principle of Embodiment 2 of the present invention;

[0028] In the diagram, 1-coil frame; 2-coil; 3-fixed frame; 4-right centering spring; 5-left centering spring; 6-magnetic shielding shell; 7-magnetic shielding end cap; 8-left permanent magnet; 9-right permanent magnet; 10-magnetic shielding base; 11-rolling support ball; 12-axial through hole; 13-center mounting hole; 14-fixing hole; 15-oil flow hole. Detailed Implementation

[0029] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0030] Example 1

[0031] like Figures 1-7 As shown, this embodiment provides a moving-coil high-frequency switching electromagnetic drive device, including a coil assembly, a magnetically shielded base 10, a left permanent magnet 8, a right permanent magnet 9, a rolling support ball 11, and a magnetically shielded end cap 7. The coil assembly includes a coil frame 1 and a coil 2 wound on the coil frame 1; the coil frame 1 is fixed to a fixed frame 3 by thermoplastic bonding.

[0032] The magnetic shielding end cap 7 is sleeved on the front end of the fixed frame 3, and the rear end of the fixed frame 3 is also inserted with a magnetic shielding base 10. A plurality of rolling support balls 11 are provided between the magnetic shielding base 10 and the fixed frame 3.

[0033] A left permanent magnet 8 is also fitted on the fixed frame 3 between the magnetic isolation end cap 7 and the coil frame 1. A right permanent magnet 9 is also fitted on the magnetic isolation base 10 between the magnetic isolation base 10 and the coil frame 1. A left centering spring 5 is also connected between the left permanent magnet 8 and the coil frame 1. A right centering spring 4 is also connected between the right permanent magnet 9 and the coil frame 1.

[0034] As a preferred embodiment, such as Figure 6 As shown, the front end of the fixed frame 3 is also provided with a set of axial through holes 12 and a central mounting hole 13, through which different actuators can be connected.

[0035] Preferably, the coil frame 1 is made of thermoplastic material, which ensures strength while maintaining integrity with the fixed frame 3.

[0036] As a preferred embodiment, such as Figure 6 As shown, the fixed frame 3 has a conical structure and is made of a non-magnetic metal material.

[0037] As preferred in the embodiment, as shown in Figures 1-5 , the coil 2 is sleeved with a magnetic isolation shell 6, and the shell covers the left permanent magnet 8 and the right permanent magnet 9.

[0038] As preferred in the embodiment, as shown in Figures 1-5 , the magnetic isolation end cover 7 is connected with the magnetic isolation shell 6 by interference or screw sealing.

[0039] As preferred in the embodiment, as shown in Figures 1-5 , the magnetic isolation base 10 has a T-shaped structure, and a support sleeve is extended from one end of the magnetic isolation base 10, and the support sleeve is provided with a fixing hole 14 for fixing the rolling support ball 11 and an oil flow hole 15.

[0040] As preferred in the embodiment, the inner side of the fixed framework 3 is in contact with the rolling support ball 11 to form a rolling structure, so as to reduce the friction resistance of the coil assembly. Therefore, the inner cavity wall of the fixed framework 3 needs to ensure the surface finish and cylindricity.

[0041] As preferred in the embodiment, as shown in Figure 2 , the left permanent magnet 8 and the right permanent magnet 9 are installed in the same way and are in contact with the inner wall of the magnetic isolation shell 6.

[0042] As preferred in the embodiment, as shown in Figure 2 , the left centering spring 5 and the right centering spring 4 are in the shape of butterfly springs and are respectively matched with the left and right end faces of the fixed framework 3 to keep the coil assembly between the left permanent magnet 8 and the right permanent magnet 9.

[0043] As preferred in the embodiment, the coil 2 is wound in the wire slot of the coil framework 1 by the enameled wire according to a fixed rotation direction, the reverse position output of the coil assembly is changed by changing the current direction of the coil 2, and the force output of the coil assembly is changed by changing the current size of the coil 2.

[0044] Embodiment 2

[0045] As shown in Figure 8 , when the current direction of the enameled wire of the coil 2 is upward, the magnetic field generated by the coil assembly has N pole on the left side and S pole on the right side. According to the principle that the same nature repels and the different nature attracts, the coil assembly moves rightward to generate displacement by overcoming the pre-tightening force of the centering springs (4, 5).

[0046] When the coil 2 front lacquered wire current direction is downward, the magnetic field generated by the coil assembly is S pole on the left and N pole on the right, according to the principle of repulsion between same nature and attraction between different nature, the coil assembly overcomes the pre-tightening force of the centering spring (4, 5) and moves left to generate displacement.

[0047] The magnetic flux generated by the coil corresponds to the magnetic attraction force, the magnetic flux is related to the number of coil ampere turns (IN), under the condition that the number of coil turns (N) is constant, the size of the current (I) is related to the magnetic attraction force, when the load needs to be moved, a larger current can be used to drive the load, when only the position needs to be maintained, a smaller current can be used to maintain the position with a smaller magnetic attraction force.

[0048] The above examples and descriptions in the specification are only to illustrate the principles and best modes of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A moving-coil high-frequency switching electromagnetic drive device, characterized in that: The device includes a coil assembly, a magnetic shielding base (10), a left permanent magnet (8), a right permanent magnet (9), a rolling support ball (11), and a magnetic shielding end cap (7). The coil assembly includes a coil frame (1) and a coil (2) wound on the coil frame (1). The coil frame (1) is fixed to the fixed frame (3) by thermoplastic bonding. The magnetic shielding end cap (7) is sleeved on the front end of the fixed frame (3), and the rear end of the fixed frame (3) is also inserted with a magnetic shielding base (10). Multiple rolling support balls (11) are provided between the magnetic shielding base (10) and the fixed frame (3). A left permanent magnet (8) is also fitted on the fixed frame (3) between the magnetic shielding end cap (7) and the coil frame (1), and a right permanent magnet (9) is also fitted on the magnetic shielding base (10) between the magnetic shielding base (10) and the coil frame (1). A left centering spring (5) is also connected between the left permanent magnet (8) and the coil frame (1), and a right centering spring (4) is also connected between the right permanent magnet (9) and the coil frame (1). The coil (2) is made of enameled wire wound in a fixed direction in the groove of the coil frame (1). The reverse position output of the coil assembly is changed by changing the current direction of the coil (2). The force output of the coil assembly is changed by changing the current magnitude of the coil (2). The coil frame (1) is made of thermoplastic material. The magnetic shielding base (10) has a T-shaped cross section, and a support sleeve extends from one end of the magnetic shielding base (10). The support sleeve is provided with a fixing hole (14) for fixing the rolling support ball (11) and an oil flow hole (15). The inner side of the fixed frame (3) contacts the rolling support ball (11) to form a rolling structure; The left permanent magnet (8) and the right permanent magnet (9) are installed in a corresponding manner and are in contact with the inner wall of the magnetic shielding shell (6); The left centering spring (5) and the right centering spring (4) adopt a butterfly spring structure and cooperate with the left and right end faces of the fixed frame (3) respectively to keep the coil assembly between the left permanent magnet (8) and the right permanent magnet (9).

2. The moving-coil high-frequency switching electromagnetic drive device according to claim 1, characterized in that: The fixed frame (3) is provided with a set of axial through holes (12) and a central mounting hole (13) at its front end, through which different actuators can be connected.

3. The moving-coil high-frequency switching electromagnetic drive device according to claim 2, characterized in that: The fixed frame (3) is a conical structure and is made of non-magnetic metal material.

4. The moving-coil high-frequency switching electromagnetic drive device according to claim 1, characterized in that: The coil (2) is fitted with a magnetic shielding shell (6) on the outside, and the shell covers the left permanent magnet (8) and the right permanent magnet (9).

5. The moving-coil high-frequency switching electromagnetic drive device according to claim 4, characterized in that: The magnetic shielding end cap (7) is connected to the magnetic shielding outer shell (6) by interference fit or by screw sealing connection.

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