Magnetic connector

Abstract

The invention discloses a magnetic connector which comprises a base body, an electromagnet control component, a permanent magnet second magnetic column ring and a permanent magnet first magnetic column ring. Each of the first set of magnet ring and the second set of magnet ring comprises eight neodymium-iron-boron magnet blocks which are sequentially and annularly arranged, the magnetic poles of the eight neodymium-iron-boron magnet blocks of the first set of magnet ring start from the N pole, and the sequential arrangement direction of the magnetic poles is N-N-N-S-N-S-S-S; the magnetic poles of the eight neodymium iron boron magnet blocks of the second set of magnet ring start from the S pole, and the arrangement direction of the magnetic poles is S-S-S-N-S-N-N-N in sequence; the magnetic poles of the neodymium-iron-boron magnet blocks at the upper and lower corresponding positions of the first set of magnet ring and the second set of magnet ring are opposite, so that mutual attraction force is generated; according to the invention, automatic ground-seeking connection is adopted, and the electromagnet controls the component to strengthen the magnetic force of the magnetic field in the connection process, so that the connector is firmer, the connector can realize targeted active ground-seeking connection, the connection and disassembly become faster and more efficient, and the wear between joints is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of connectors, and in particular relates to a magnetic connector. Background Art

[0002] In the field of mechanical equipment, magnetic connectors can be used between some equipment parts that need to be frequently connected or replaced, which can achieve quick connection and separation and improve work efficiency. Problems with magnetic connectors in the existing technology: 1. The magnetic connector is not firmly docked, and it is impossible to perform precise docking. It is easy to accidentally attract metal parts in actual use. 2. The degree of automation is not high when making connections, and it is impossible to find the corresponding connection when docking. 3. After the connection is unstable, transmission interruption is likely to occur, and the interface form is wide and bulky. 4. The interface style is complex, and the inability to unify the interface style causes difficulties in production. 5. The same interface connector is prone to accidental attraction, which causes damage to the connector pins in actual use. Summary of the Invention

[0003] The present invention provides a magnetic connector for realizing power transmission, signal transmission, mechanical connection between electronic devices or between electronic device components, and interface docking of precision instruments, etc. Precise and automated docking equipment is required.

[0004] To solve the above problems, the present invention provides the following technical solutions:

[0005] An embodiment of the present invention provides a magnetic attraction connector, comprising a base, an electromagnet control component located at the lower part of the base, a permanent magnet second magnetic column ring located above the electromagnet control component, and a permanent magnet first magnetic column ring located above the permanent magnet second magnetic column ring; the first set of magnet rings and the second set of magnet rings each include 8 NdFeB magnet blocks arranged in a ring shape in sequence, an annular PCB board is provided in the electromagnet control component, the annular PCB board is embedded with 16 electromagnetic units, and the 16 electromagnetic units are respectively connected to the 16 NdFeB magnet blocks in a one-to-one correspondence; the magnetic poles of the 8 NdFeB magnet blocks of the first set of magnet rings start from the N pole and are arranged in a direction of NNNSNSSS; the magnetic poles of the 8 NdFeB magnet blocks of the second set of magnet rings start from the S pole and are arranged in a direction of SSSNSNNN; the magnetic poles of the NdFeB magnet blocks at corresponding upper and lower positions of the first set of magnet rings and the second set of magnet rings are opposite, thereby generating a mutual attraction force.

[0006] In a preferred embodiment of the present invention, the substrate is an epoxy resin barrel-shaped structure.

[0007] In a preferred embodiment of the present invention, the inner cavities of the first permanent magnet magnetic column ring and the second permanent magnet magnetic column ring are each provided with four pin slots, and each pin slot is connected to a pin.

[0008] In a preferred embodiment of the present invention, two adjacent NdFeB magnet blocks in the first set of magnet rings and the second set of magnet rings are both bonded and cured with EPO-TEK H20E conductive adhesive.

[0009] In a preferred embodiment of the present invention, the outer diameters of the first set of magnet rings and the second set of magnet rings are both 20 mm, and the inner diameters are both 11 mm.

[0010] In a preferred embodiment of the present invention, the radial width×circumferential length×thickness dimensions of each NdFeB magnet block are 4×4×4 mm respectively.

[0011] In a preferred embodiment of the present invention, the upper and lower axial reserved gaps between the first set of magnet rings and the second set of magnet rings are 4 mm in height.

[0012] In a preferred embodiment of the present invention, the electromagnetic unit is a 50-turn coil, and the coil driving current is 0-2A.

[0013] Compared with the prior art, the embodiment of the present invention provides a magnetic connector with the following beneficial effects: usage scenario appearance design, first, the magnetic connector uses split neodymium iron boron magnets in the main part to form some small units, and then the small units are calculated by computer software to form a group of special magnetic fields and then arranged and combined, and then cast with epoxy resin to form a whole. The present invention adopts automatic grounding connection. During the connection process, the electromagnet control component strengthens the magnetic force of the magnetic field, making the connector tighter, allowing the connector to actively seek the ground and connect, making connection and disassembly faster and more efficient, and reducing wear between joints. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic cross-sectional view of a magnetic connector provided in an embodiment of the present application.

[0016] Figure 2 A schematic cross-sectional view of a magnetic connector without pins provided in an embodiment of the present application.

[0017] Figure 3 Schematic diagram of the first magnetic ring of a permanent magnet of a magnetic connector provided in an embodiment of the present application.

[0018] Figure 4Schematic diagram of the second magnetic ring of a permanent magnet of a magnetic connector provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. The "upper", "lower", "front", "rear", "left", "right", etc. used in the installation position or direction of the structure or parts of this embodiment are based on the orientation of the given drawings. They are only for the convenience of expression to distinguish the relative positions of the various parts or directions, and do not represent the orientation of the device or parts of this embodiment when in use.

[0020] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a magnetic connector, comprising a base 1, an electromagnet control member 4 located at the bottom of the base 1, a permanent magnet second magnetic column ring 3 located above the electromagnet control member 4, and a permanent magnet first magnetic column ring 2 located above the permanent magnet second magnetic column ring 3. The base 1 is an epoxy resin slurry-shaped structure. An insulating layer 6, which is a silicon nitride or silicon oxide layer, is provided at the bottom of the base 1. The electromagnet control member 4 is located above the insulating layer 6. The inner cavities of the permanent magnet first magnetic column ring 2 and the permanent magnet second magnetic column ring 3 are each provided with four pin slots 7, each of which is connected to a pin 5. In this embodiment, the inner side of the permanent magnet first magnetic column ring 2 is provided with four first ring sleeves 8, which are located in the pin slots 7, and the pins 5 are connected to the first ring sleeves 8. The inner side of the permanent magnet second magnetic column ring 3 is provided with four second ring sleeves 9, which are located in the pin slots 7, and the pins 5 are connected to the second ring sleeves 8. An annular PCB board is set in the electromagnet control component, and the annular PCB board is embedded with 16 electromagnetic units. The 16 electromagnetic units are respectively connected to 16 neodymium iron boron magnet blocks. The electromagnetic unit is a 50-turn coil, and the coil driving current is 0-2A.

[0021] The present invention utilizes the Halbach theory to perform magnetic superposition to form a unique magnetic field for the magnetic connector, thereby achieving unique coding of the magnetic connector. This is to form a specific connection object for the magnetic connector. The unified shape of the magnetic connector achieves universal standardization and accelerates connector production; the number of connector pins and the pin arrangement method are increased, and the pins are arranged in order; precise connections are achieved in multiple connectors, and the magnetic pins and magnet blocks are automatically connected during the connection process; the pins and magnet blocks twist and deflect during the connection process, and the connection is automatically aligned during the docking process. The details are as follows:

[0022] The first set of magnet rings 2 and the second set of magnet rings 3 both include 8 NdFeB magnet blocks arranged in a ring shape. The magnetic poles of the 8 NdFeB magnet blocks of the first set of magnet rings 2 start from the N pole, and the magnetic pole arrangement direction is NNNSNSSS. Figure 3 As shown, the eight NdFeB magnet blocks of the first set of magnet rings 2 are respectively the first NdFeB magnet block 2-1, the second NdFeB magnet block 2-2, the third NdFeB magnet block 2-3, the fourth NdFeB magnet block 2-4, the fifth NdFeB magnet block 2-5, the sixth NdFeB magnet block 2-6, the seventh NdFeB magnet block 2-7 and the eighth NdFeB magnet block 2-8, and the magnetic pole arrangement directions of the first NdFeB magnet block 2-1, the second NdFeB magnet block 2-2, the third NdFeB magnet block 2-3, the fourth NdFeB magnet block 2-4, the fifth NdFeB magnet block 2-5, the sixth NdFeB magnet block 2-6, the seventh NdFeB magnet block 2-7 and the eighth NdFeB magnet block 2-8 are NNNSNSSS respectively.

[0023] The 8 NdFeB magnet blocks of the second set of magnet rings have poles starting from the S pole, and the pole arrangement direction is SSSNSNNN. Figure 4 As shown, the eight NdFeB magnet blocks of the second set of magnet rings 3 are respectively the ninth NdFeB magnet block 3-1, the tenth NdFeB magnet block 3-2, the eleventh NdFeB magnet block 3-3, the twelfth NdFeB magnet block 3-4, the thirteenth NdFeB magnet block 3-5, the fourteenth NdFeB magnet block 3-6, the fifteenth NdFeB magnet block 3-7 and the sixteenth NdFeB magnet block 3-8, and the magnetic pole arrangement directions of the ninth NdFeB magnet block 3-1, the tenth NdFeB magnet block 3-2, the eleventh NdFeB magnet block 3-3, the twelfth NdFeB magnet block 3-4, the thirteenth NdFeB magnet block 3-5, the fourteenth NdFeB magnet block 3-6, the fifteenth NdFeB magnet block 3-7 and the sixteenth NdFeB magnet block 3-8 are SSSNSNNN respectively.

[0024] like Figure 1 、 Figure 3 and Figure 4 As shown, the magnetic poles of the NdFeB magnet blocks at corresponding upper and lower positions of the first set of magnet rings 2 and the second set of magnet rings 3 are opposite, thereby generating a mutual attraction force.

[0025] The two adjacent NdFeB magnets in the first and second magnet rings 2 and 3 are bonded and cured with EPO-TEK H20E conductive adhesive, which has a temperature resistance of -50°C to 180°C. The conductive adhesive film thickness is 0.8mm, with a surface roughness of Ra 0.8μm. Curing conditions are 80°C / 2h, and the thermal expansion coefficient matches that of the NdFeB. After epoxy encapsulation, the outer diameter of the first and second magnet rings 2 and 3 is 20mm, and the inner diameter (center hole diameter) is 11mm. The radial width, circumferential length, and thickness of each NdFeB magnet are 4×4×4mm, respectively. The first and second magnet rings 2 and 3 are stacked in two layers in the axial direction, with a 4mm vertical gap between them.

[0026] Manufacturing process for the first set of magnet rings 2 and the second set of magnet rings 3: Laser cutting: Segmenting the NdFeB magnets and electroplating the magnets; Magnet arrangement: Using a robotic arm to identify the north and south poles of the magnets and arrange them; Bonding and curing: Glue: EPO-TEK H20E conductive glue, pressure: 0.5MPa, maintaining pressure for 30 minutes; Post-sorting inspection: Gauss meter scanning, single magnet surface magnetic field difference <5%, magnetic moment direction deviation <2°.

[0027] The above is the structural design of the magnetic connector: an N52 NdFeB permanent magnet ring (4mm thick) with an outer diameter of 20mm and an inner diameter of 11mm is set in the base; a ring-shaped PCB board is set in the electromagnet control component, embedded with 16 electromagnetic units (each unit has a 50-turn coil and a drive current of 0-2A). Control logic: Connection phase: The permanent magnet provides a basic adsorption force of 8N; Stability phase: The electromagnet control component coil is energized, and the total adsorption force is increased to 12.8N; Separation phase: The electromagnetic reverse power is applied, and the adsorption force is reduced to less than 5N. Energy efficiency: Only a short power supply (less than 5 seconds) is required during the stability phase, and the power consumption is less than 25.6W; zero power consumption in standby mode (the permanent magnet maintains the basic connection).

[0028] The working process of the magnetic connector: it starts when it is close to the device, activating the magnetic fields of the first set of magnet rings and the second set of magnet rings, the connectors are twisted and precisely docked, the coil of the electromagnet control component is energized to enter the holding mode, and the coil of the electromagnet control component is de-energized and separated from the close device.

[0029] The control logic architecture of the magnetic connector is as follows: application layer instruction parsing (mode selection, target position posture); magnetic field planner (generates target B-field distribution); multivariable controller (MPC + feedforward compensation); power drive layer (H-bridge PWM + overcurrent protection); electromagnet array (16-channel independent coils); sensor feedback (Hall + IMU + temperature).

[0030] Magnetic connector calculation process:

[0031] Magnetic field superposition formula, the total magnetic field is the vector superposition of the permanent magnetic field and the electromagnetic field:

[0032] n is the number of permanent magnet units (base unit), m is the number of electromagnetic coils (usually m = m);

[0033] Based on Maxwell's method: B 0 is the surface magnetic field of a single permanent magnet unit (typical value 1.2T), A is the area of ​​a single magnetic unit (4×4mm 2 =1.6×10 -5 m 2 ).

[0034] Key parameters of the magnetic connector (based on n = 16): Total suction force F = 0.8nN, typical value when n = 16, F = 12.8N. Magnetic field gradient ▽B = 0.2nT / mm, typical value when n = 16, ▽B = 3.2T / mm. Electromagnetic coil resistance R = 4 / n(Ω), typical value when n = 16, R = 0.25Ω. Total system power consumption P = 0.1n 2 Typical value when W,n=16, P=25.6W.

[0035] The performance of the magnetic connector is as follows: Positioning accuracy, scaled by 0.5 / n (mm), n = 16, predicted value, positioning accuracy is 0.031mm, measured value, positioning accuracy is 0.031±0.002mm. Response time, scaled by 10+0.2n (ms), n = 16, predicted value, response time is 13.2ms, measured value, response time is 14.5ms. Power density, scaled by 0.02n (w / cm 3 ), n = 16 predicted value, power density = 0.32 (w / cm 3 ), measured verification value, power density = 0.29 (w / cm 3 ).

[0036] Design verification example (n=16), maximum adsorption force test, the electromagnetic coil of the input electromagnet control component is passed through 2A current, the theoretical value F MAX =0.8n+0.1n 2 =0.8×16+0.1×256=12.8+25.6=38.4N, the measured value is 36.7N, with an error of 4.4%. Minimum step angle, theoretical resolution; Θ res =180° / (πn)=180 / (3.1416×16)≈3.6°, which can reach 0.1° after closed-loop control.

[0037] Usage scenario appearance design, first of all, the magnetic connector uses split neodymium iron boron magnets in the main part to form some small units, and then the small units are calculated by computer software to form a set of special magnetic fields and then arranged and combined, and then cast with epoxy resin to form a whole. The present invention adopts automatic ground connection. During the connection process, the electromagnet control component strengthens the magnetic field force to make the connector tighter, so that the connector can actively find the ground connection, making connection and disassembly faster and more efficient, and reducing wear between joints.

[0038] Although the present invention has been disclosed above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A magnetic connector, characterized in that: The invention comprises a base, an electromagnet control component located at the bottom of the base, a second permanent magnet magnetic array ring located above the electromagnet control component, and a first permanent magnet magnetic array ring located above the second permanent magnet magnetic array ring; the first set of magnet rings and the second set of magnet rings each comprise eight NdFeB magnet blocks arranged in a ring shape in sequence; an annular PCB board is provided in the electromagnet control component, and the annular PCB board is embedded with 16 electromagnetic units, and the 16 electromagnetic units are respectively connected to the 16 NdFeB magnet blocks in a one-to-one correspondence; the magnetic poles of the eight NdFeB magnet blocks of the first set of magnet rings start from the N pole and are arranged in a direction of NNNSNSSS; the magnetic poles of the eight NdFeB magnet blocks of the second set of magnet rings start from the S pole and are arranged in a direction of SSSNSNNN; the magnetic poles of the NdFeB magnet blocks at corresponding upper and lower positions of the first and second set of magnet rings are opposite, thereby generating a mutual attraction force.

2. The magnetic connector according to claim 1, characterized in that: The matrix is ​​an epoxy resin barrel-shaped structure.

3. The magnetic connector according to claim 1, characterized in that: The inner cavities of the first permanent magnet magnetic column ring and the second permanent magnet magnetic column ring are both provided with four pin slots, and each pin slot is connected to a pin.

4. The magnetic connector according to claim 1, characterized in that: The two adjacent NdFeB magnet blocks in the first set of magnet rings and the second set of magnet rings are both bonded and cured with EPO-TEK H20E conductive adhesive.

5. The magnetic connector according to claim 1, characterized in that: The outer diameters of the first set of magnet rings and the second set of magnet rings are both 20 mm, and the inner diameters are both 11 mm.

6. The magnetic connector according to claim 5, characterized in that: The radial width×circumferential length×thickness dimensions of each NdFeB magnet block are 4×4×4 mm respectively.

7. The magnetic connector according to claim 1, characterized in that: The upper and lower axial gaps between the first set of magnet rings and the second set of magnet rings are reserved to a height of 4 mm.

8. The magnetic connector according to claim 1, characterized in that: The electromagnetic unit is a 50-turn coil, and the coil driving current is 0-2A.

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