Pushing structure and nanocrystalline relay

Abstract

The invention discloses a pushing structure and a nanocrystalline relay, and relates to the technical field of relays. The electromagnetic coil is wound on the outer side of the tubular iron core, the armature is inserted into the tubular iron core in a sliding mode, and the tubular iron core, the electromagnetic coil and the armature are all contained in the shell; and the insulating block is arranged at the end part of the armature, and a conductive plate is fixedly arranged on the insulating block. Compressible gas serves as driving force of the gas pressure driving module, the gas pressure driving module replaces a metal spring, the problem of performance degradation of material mechanics under a high-temperature annular condition is avoided, compared with the prior art, gas molecules serving as a driving source are free of lattice structures, permanent deformation caused by dislocation slippage of the metal spring can be avoided, and in other words, the mechanical performance of the gas pressure driving module is improved. According to the invention, the armature and the current-conducting plate can still be driven to act and reset to an initial state after working in a high-temperature environment for a long time, and the situation of resetting force attenuation is not easy to occur.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a driving structure and a nanocrystalline relay. Background Art

[0002] A relay is an "automatic switch" that uses a small current to control a large current. It is used for safe operation and circuit conversion. Its weight and performance depend on the efficiency of the magnetic material (the electromagnetic attraction provided by the unit weight). High efficiency brings stronger vibration resistance, surge resistance and fast response capabilities. Therefore, using high magnetic permeability materials to achieve a small cross-section to conduct large magnetic flux is an effective way to achieve high performance, high reliability and lightweight design. Nanocrystalline materials are particularly suitable for high-frequency switching applications due to their extremely low loss and high-efficiency magnetic permeability at high frequencies from kHz to MHz. With the development of 5G and new energy, nanocrystalline relays are becoming A key component of high-precision power electronic systems, and the "driving structure" of the relay refers to the combination of key components inside the relay that converts electromagnetic force into mechanical motion, thereby driving the contact action. It specifically includes a coil, an iron core, an armature, a push rod, and a reaction spring. The working process is as follows: when the coil is energized, the iron core will be magnetized to attract the armature to move. At this time, the reaction spring is compressed, and then the movement of the armature drives the push rod to connect with the two contacts to make the circuit conductive; when the coil is de-energized, the iron core and the armature are separated, and the elastic force of the reaction spring pulls the armature and the push rod back to their initial positions, and the circuit is disconnected.

[0003] However, in actual use, the temperature change of the relay has a greater impact on the reaction spring. When the spring is used for a long time in a high-temperature environment, it is easy to deform, affecting the normal use of the relay. That is, after disconnection, it is difficult for the spring to reset the moving contact to the initial state. The distance between the moving contact and the static contact is close, and the current can easily break through the air and generate an arc. In order to reasonably improve this problem, the present invention proposes a driving structure and a nanocrystalline relay. Summary of the Invention

[0004] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0005] A propulsion structure includes a tubular iron core, an electromagnetic coil wound around the outside of the tubular iron core, and an armature slidably inserted into the tubular iron core, and further includes:

[0006] The housing contains the tubular iron core, the electromagnetic coil and the armature;

[0007] An insulating block is mounted on the end of the armature, and a conductive plate is fixed on the insulating block;

[0008] A plurality of pneumatic drive modules are distributed in a ring shape around the armature and fixed to the inner wall of the housing;

[0009] The mechanical linkage mechanism connects the output end of the pneumatic drive module with the side wall of the armature, so that the pneumatic drive module can apply an axial resetting force to the armature.

[0010] Furthermore, the pneumatic drive module includes a tube body connected to the inner wall of the shell, the piston in the tube body is matched with a column, a movable rod is constructed at one end of the column, a through hole is constructed on the tube body, a sealing gasket is laid on the inner wall of the through hole, the movable rod slides through the through hole, and contacts and overlaps with the inner side of the sealing gasket ring.

[0011] Furthermore, an annular groove is constructed on the inner wall of the tube body and is located at the end of the tube body and away from the through hole.

[0012] Furthermore, a lubrication mechanism is provided on the column to lubricate the sliding column.

[0013] Furthermore, the lubrication mechanism includes an annular cavity constructed in the column, which is filled with grease, two groups of sealing rings are connected to the outside of the column, and multiple holes are distributed in an annular manner around the circumference of the column, which are located between the two groups of sealing rings and connected to the annular cavity.

[0014] Furthermore, a plurality of heat-conducting fins are distributed in an annular manner around the tube body.

[0015] Furthermore, the mechanical linkage mechanism includes a first cylinder coaxially constructed on the circumferential side of the armature, whose bottom is constructed with a first hemispherical surface, and the end of the movable rod is connected to a second cylinder, whose end is constructed with a second hemispherical surface that contacts and overlaps with the first hemispherical surface.

[0016] Furthermore, a plurality of guide rods are distributed in an annular pattern on the outside of the tube body. The plurality of guide rods are parallel to each other and connected to the inner wall of the shell. A sleeve is slidably fitted on the outside of the guide rods. A connecting plate is distributed in an annular pattern on the circumference of the second cylinder and is respectively connected to the plurality of sleeves.

[0017] The nanocrystalline relay includes the above-mentioned driving structure and also includes pins arranged at the bottom of the shell. The shell is provided with conductive contacts on the inner wall opposite to the inner wall and is electrically connected to the pins. The two conductive contacts are respectively in contact with the two ends of the bottom of the conductive plate.

[0018] Furthermore, a fixing plate is constructed on the insulating block, and a conductive plate is arranged at the bottom of the fixing plate. Two fixing rods are connected to the shell and are respectively arranged in parallel on both sides of the fixing plate. Two L-shaped blocks are provided above the two conductive contacts, and the L-shaped block includes a first section and a second section that are vertically connected to each other, wherein the ends of the first sections are respectively hinged to the fixing rods, and the ends of the two second sections are in contact with each other and overlap. Connecting blocks are vertically connected to both ends of the fixing plate, and guide columns are constructed on the back sides of the connecting blocks. A connecting plate is vertically connected to the first section, and a waist hole is opened on the connecting plate. The guide column slides tangent to the inner wall of the waist hole.

[0019] The beneficial effects of the present invention are as follows: the present invention uses compressible gas as the driving force of the pneumatic drive module, and replaces the metal spring with the pneumatic drive module to avoid the problem of performance degradation of material mechanics under high-temperature ring conditions. Compared with the existing technology, the gas molecules as the driving source have no lattice structure, which can avoid the permanent deformation caused by dislocation slip of the metal spring. That is, the present invention can work for a long time in a high-temperature environment and still drive the armature and the conductive plate to move and reset them to their initial state, and is not prone to attenuation of the reset force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional view of the internal structure of the housing of the present invention;

[0022] Figure 3 This invention Figure 2 A partial structural cross-sectional view;

[0023] Figure 4 This invention Figure 3 A magnified view of point A;

[0024] Figure 5 This invention Figure 2 Schematic diagram of the local structure;

[0025] Figure 6 This invention Figure 5 Structural cross-sectional view;

[0026] Figure 7 It is a schematic diagram of the column structure of the present invention;

[0027] Figure 8 This invention Figure 7 A half-section side view of the structure;

[0028] Figure numerals: 1, tubular core; 2, electromagnetic coil; 3, armature; 4, housing; 5, insulating block; 6, conductive plate; 7, pneumatic drive module; 701, tube; 702, column; 703, movable rod; 704, perforation; 705, sealing gasket; 8, mechanical linkage mechanism; 801, first cylinder; 802, first hemispherical surface; 803, second cylinder; 804, second hemispherical surface; 9, annular groove ; 10. Lubrication mechanism; 1001. Annular cavity; 1002. Sealing ring; 1003. Hole; 11. Thermal fin; 12. Guide rod; 13. Sleeve; 14. Connecting plate; 15. Pin; 16. Conductive contact; 17. Fixing plate; 18. Fixing rod; 19. L-shaped block; 1901. First section; 1902. Second section; 20. Connecting block; 21. Guide column; 22. Connecting plate; 23. Waist hole. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] like Figures 1-8 As shown, a propulsion structure proposed in one embodiment of the present invention includes a tubular iron core 1, an electromagnetic coil 2 wound around the outside of the tubular iron core 1, and an armature 3 slidably inserted into the tubular iron core 1. This is a prior art technique. The tubular iron core 1 is made of a nanocrystalline alloy. Its working principle is as follows: the electromagnetic coil 2 is electromagnetically excited by the tubular iron core 1 to attract the armature 3 at the tube end of the tubular iron core 1, allowing it to be inserted into the tubular iron core 1;

[0031] The distinguishing technical features of the present invention also include: a housing 4, in which the tubular core 1, the electromagnetic coil 2 and the armature 3 are all accommodated;

[0032] The insulating block 5 is mounted on the end of the armature 3. A conductive plate 6 is fixed on the insulating block 5. The insulating block 5 is used to separate the conductive plate 6 from the armature 3. When the armature 3 is displaced under the attraction of the tubular core 1, the conductive plate 6 is driven to move and contact the contact, thereby conducting the circuit.

[0033] Multiple pneumatic drive modules 7 are distributed in a ring around the armature 3 and fixed to the inner wall of the housing 4, wherein CO2 compressed gas serves as the source of the module driving force;

[0034] The mechanical linkage mechanism 8 connects the output end of the pneumatic drive module 7 with the side wall of the armature 3 so that the pneumatic drive module 7 can apply an axial reset force to the armature 3. That is, after the electromagnetic coil 2 loses power, the tubular iron core 1 does not attract the armature 3. At this time, the pneumatic drive module 7 can replace the spring to drive the armature 3 and the conductive plate 6 to reset. At the same time, the annular distribution of the pneumatic drive module 7 can solve the problem of force balance on the armature 3.

[0035] The CO2 compressed gas has excellent thermal expansion performance. The higher the operating temperature, the greater the gas expansion amplitude. That is, the driving force of the air pressure drive module 7 will not decay in a high temperature environment and can stably drive the armature 3 to move.

[0036] The present invention uses compressible gas as the driving force of the pneumatic drive module 7, and replaces the metal spring with the pneumatic drive module 7 to avoid the problem of performance degradation of material mechanics under high-temperature ring conditions. Compared with the existing technology, the gas molecules as the driving source have no lattice structure, which can avoid the permanent deformation caused by dislocation slip of the metal spring. That is, the present invention can work for a long time in a high-temperature environment and still drive the armature 3 and the conductive plate 6 to move and reset them to their initial state, and is not prone to attenuation of the reset force.

[0037] like Figure 2 、 Figure 5 and Figure 7 As shown, the specific structure of the pneumatic drive module 7 of the present invention is disclosed. The pneumatic drive module 7 includes a tube 701 connected to the inner wall of the shell 4, the armature 3 is located on the axis of the tube 701, and CO2 compressed gas is filled therein. The piston in the tube 701 is equipped with a column 702, and a movable rod 703 is constructed at one end of the column 702. This is the end of the column 702 facing the armature 3. When the armature 3 is displaced under the attraction of the tubular iron core 1, the movable rod 703 is driven to move through the mechanical linkage mechanism 8, so that the column 702 can move in the direction away from the armature 3 in the tube 701. At this time, the air in the tube 701 can be compressed. The tube 701 is constructed with perforations. 704, the through hole 704 is close to the armature 3, and the inner wall of the through hole 704 is paved with a sealing gasket 705, which is annular. The movable rod 703 slides through the through hole 704 and contacts and overlaps with the inner side of the sealing gasket 705 ring, so that the tube body 701 can be sealed. By adopting such a design, when the column 702 moves in the direction away from the through hole 704, the tube body 701 can be divided into two cavities with the column 702 as the center. The compressed air is in the first cavity. Since the second cavity is formed by the movement of the column 702, a negative pressure is formed inside it. Under the joint action of the compressed air and the negative pressure, the armature 3 can be driven to reset through the mechanical linkage mechanism 8.

[0038] like Figure 5 and Figure 7 As shown, a further technical solution of the present invention for increasing the gas compression amplitude within a limited stroke is disclosed. An annular groove 9 is constructed on the inner wall of the tube body 701, and is located at the end of the tube body 701 and away from the perforation 704. When the column 702 moves to the end of the tube body 701 away from the perforation 704, all the compressed gas can be squeezed into the annular groove 9. Since the volume of the annular groove 9 is much smaller than the cross-section of the tube body 701, the gas compression amplitude can be increased within the limited stroke of the column 702, that is, the "micro-boosting effect" can be achieved in a smaller space, thereby further reducing the volume of the device.

[0039] like Figure 6-Figure 8 As shown, the present invention discloses a further technical solution for the movement and lubrication of the column 702. A lubrication mechanism 10 is provided on the column 702 to lubricate the sliding column 702. Under high temperature conditions, the sliding wear between the column 702 and the tube 701 is large. The present invention adopts the design of the lubrication mechanism 10 to lubricate the column 702, thereby improving the service life of the device under high temperature conditions.

[0040] like Figure 6-Figure 8As shown, the specific structure of the lubrication mechanism 10 of the present invention is disclosed. The lubrication mechanism 10 includes an annular cavity 1001 constructed in the cylinder 702. The annular cavity 1001 is coaxial with the cylinder 702 and is filled with grease, specifically non-silicone synthetic oil-based electrical contact grease. Two sets of sealing rings 1002 are connected to the outside of the cylinder 702. A plurality of holes 1003 are distributed in an annular manner around the cylinder 702. The holes 1003 are located between the two sets of sealing rings 1002 and are connected to the annular cavity 1001. When the operating temperature of the above-mentioned grease is above 70°C, the viscosity of the grease drops from NLGI grade 2 to grade 1. At this time, the grease can seep out of the annular cavity 1001 through the holes 1003 and accurately lubricate the friction surface of the sealing ring 1002 when the cylinder 702 moves. At the same time, the antioxidant additives in the grease can also delay the aging of the sealing ring 1002 and extend its service life.

[0041] like Figure 5 As shown, a further technical solution of the present invention is disclosed. A plurality of heat-conducting fins 11 are distributed in an annular manner around the tube body 701. When the air is compressed rapidly, the temperature will rise sharply. At the same time, the friction between the movement of the column 702 and the inner wall of the tube body 701 will also generate heat. The heat-conducting fins 11 can increase the area of ​​the outer surface of the tube body 701, thereby efficiently dissipating the heat generated by compression and friction, and controlling the operating temperature of the tube body 701 and the internal air within a safe and efficient range. At the same time, the temperature is controlled within the allowable operating range of the grease, which plays a role in protecting the lubrication system and can further improve the system reliability.

[0042] like Figure 2 and Figure 5 As shown in the figure, the specific structure of the mechanical linkage mechanism 8 of the present invention is disclosed. The mechanical linkage mechanism 8 includes a first cylinder 801 coaxially constructed on the side of the armature 3, a first hemispherical surface 802 is constructed at the bottom, and a second cylinder 803 is connected to the end of the movable rod 703, a second hemispherical surface 804 is constructed at the end thereof to contact and overlap with the first hemispherical surface 802. The first hemispherical surface 802 and the second hemispherical surface 804 are in point contact, with a small contact area and low friction resistance. When the armature 3 is attracted by the tubular core 1, the first cylinder 801 moves toward the tubular core 1. The iron core 1 moves. At this time, the first hemispherical surface 802 will conflict with the second hemispherical surface 804, and force the second cylinder 803 to drive the movable rod 703 and the column 702 to move and compress the gas. When the armature 3 is not attracted by the tubular iron core 1, under the action of the compressed gas, the column 702 and the movable rod 703 will drive the second cylinder 803 to move. At this time, the second hemispherical surface 804 will conflict with the first hemispherical surface 802, and force the second cylinder 803 and the armature 3 to move in the direction away from the tubular iron core 1.

[0043] like Figure 2 、 Figure 5 and Figure 7As shown, a further technical solution of the present invention is disclosed. A plurality of guide rods 12 are distributed in an annular manner on the outer side of the tube body 701. The plurality of guide rods 12 are parallel to each other and connected to the inner wall of the shell 4. A sleeve 13 is slidably fitted on the outer side of the guide rods 12. A connecting plate 14 is distributed in an annular manner on the circumference of the second cylinder 803 and is respectively connected to the plurality of sleeves 13. When the first hemispherical surface 802 contacts the second hemispherical surface 804, it can push the second cylinder 803 to move, but the direction of the force applied to the second hemispherical surface 804 is not the same as the movement direction of the second cylinder 803, that is, the second cylinder 803 will also receive the force in the sliding direction of the first cylinder 801. The design of guiding the movement of the second cylinder 803 by the plurality of guide rods 12 can prevent the second cylinder 803 from offsetting under the influence of this force, so that the sealing gasket 705 and the sealing ring 1002 are not easily excessively worn by the movable rod 703 and the cylinder 702.

[0044] like Figure 1-Figure 4 As shown, a nanocrystalline relay proposed in one embodiment of the present invention includes the above-mentioned driving structure and also includes a pin 15 provided at the bottom of the housing 4. The housing 4 is provided with a conductive contact 16 on the inner wall opposite to the housing 4 and is electrically connected to the pin 15. The two conductive contacts 16 respectively contact and overlap with the two ends of the bottom of the conductive plate 6. When the armature 3 is attracted by the tubular iron core 1, the conductive plate 6 contacts the two conductive contacts 16, and the circuit is conductive. When the armature 3 is reset, the conductive plate 6 separates from the two conductive contacts 16, and the circuit is disconnected.

[0045] like Figure 3 and Figure 4 As shown, based on the above-mentioned pushing structure, the present invention further discloses a further technical solution for a nanocrystalline relay. A fixing plate 17 is constructed on the insulating block 5, and a conductive plate 6 is provided at the bottom of the fixing plate 17. Two fixing rods 18 are connected to the housing 4 and are respectively provided in parallel on both sides of the fixing plate 17. Two L-shaped blocks 19 are provided above the two conductive contacts 16. The L-shaped block 19 includes a first section 1901 and a second section 1902 that are perpendicularly connected to each other, wherein the ends of the first section 1901 are respectively hinged to the fixing rods 18, and the ends of the two second sections 1902 are mutually abutted and overlapped. Connecting blocks 20 are perpendicularly connected to both ends of the fixing plate 17, and guide pillars 21 are constructed on the back sides of the connecting blocks 20. Connecting plates 22 are perpendicularly connected to the first section 1901, and waist holes 23 are opened on the connecting plates 22. The guide pillars 21 slide tangentially with the inner wall of the waist holes 23.

[0046] When the fixed plate 17 moves together with the conductive plate 6 under the action of the armature 3, the connecting block 20 moves synchronously. The guide pillar 21 contacts the inner wall of the waist hole 23 during the movement, forcing the connecting plate 22 to drive the first section 1901 of the L-shaped block 19 to rotate along the axis of the fixed rod 18, so that the second sections 1902 of the two L-shaped blocks 19 move away from each other, so that the conductive plate 6 can pass through and contact the two conductive contacts 16.

[0047] like Figure 4 As shown, when the conductive plate 6 is reset, the hinge axes of the two connecting plates 22 and the connecting block 20 are in the same plane as the axes of the two fixing rods 18. At this time, the two first sections 1901 are parallel to each other, and the ends of the two second sections 1902 are in contact and overlap, separating the conductive contacts 16 and the conductive plate 6, thereby achieving the effect of rapid arc extinguishing.

[0048] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A propulsion structure comprising a tubular iron core (1), an electromagnetic coil (2) wound around the outside of the tubular iron core (1), and an armature (3) slidably inserted into the tubular iron core (1), characterized in that: Also includes: A housing (4), wherein the tubular iron core (1), the electromagnetic coil (2) and the armature (3) are all accommodated in the housing (4); An insulating block (5) is mounted on the end of the armature (3), and a conductive plate (6) is fixedly provided on the insulating block (5); A plurality of pneumatic drive modules (7) are distributed in a ring shape around the armature (3) and fixed to the inner wall of the housing (4); The mechanical linkage mechanism (8) connects the output end of the pneumatic drive module (7) and the side wall of the armature (3), so that the pneumatic drive module (7) can apply an axial resetting force to the armature (3).

2. The propulsion structure according to claim 1, characterized in that: The pneumatic drive module (7) includes a tube body (701) connected to the inner wall of the shell (4), a piston in the tube body (701) is matched with a column (702), one end of the column (702) is configured with a movable rod (703), a through hole (704) is configured on the tube body (701), the inner wall of the through hole (704) is paved with a sealing gasket (705), the movable rod (703) slides through the through hole (704) and contacts and overlaps with the inner side of the sealing gasket (705) ring.

3. The propulsion structure according to claim 2, characterized in that: The inner wall of the tube body (701) is provided with an annular groove (9), which is located at the end of the tube body (701) and is away from the through hole (704).

4. The propulsion structure according to claim 3, characterized in that: A lubrication mechanism (10) is provided on the column (702) for lubricating the sliding column (702).

5. The propulsion structure according to claim 4, characterized in that: The lubricating mechanism (10) comprises an annular cavity (1001) constructed in a column (702) and filled with lubricating grease. Two sets of sealing rings (1002) are connected to the outside of the column (702). A plurality of holes (1003) are distributed in an annular pattern around the circumference of the column (702), which are located between the two sets of sealing rings (1002) and communicate with the annular cavity (1001).

6. The propulsion structure according to claim 5, characterized in that: A plurality of heat-conducting fins (11) are distributed in an annular manner around the tube body (701).

7. The propulsion structure according to claim 6, characterized in that: The mechanical linkage mechanism (8) comprises a first cylinder (801) coaxially constructed on the circumference of the armature (3), the bottom of which is constructed with a first hemispherical surface (802); the end of the movable rod (703) is connected to a second cylinder (803), the end of which is constructed with a second hemispherical surface (804) that contacts and overlaps the first hemispherical surface (802).

8. The propulsion structure according to claim 7, characterized in that: A plurality of guide rods (12) are distributed in an annular manner on the outer side of the tube body (701), and the plurality of guide rods (12) are parallel to each other and connected to the inner wall of the shell (4). A sleeve (13) is slidably fitted on the outer side of each of the guide rods (12). A connecting plate (14) is distributed in an annular manner on the circumference of the second cylinder (803), and is respectively connected to the plurality of sleeves (13).

9. A nanocrystalline relay comprising the driving structure according to any one of claims 1 to 8, characterized in that: It also includes a pin (15) provided at the bottom of the shell (4), and the shell (4) is provided with a conductive contact (16) relative to the inner wall and is electrically connected to the pin (15), and the two conductive contacts (16) are respectively in contact with the two ends of the bottom of the conductive plate (6).

10. The nanocrystalline relay according to claim 9, characterized in that: The insulating block (5) is provided with a fixing plate (17), the conductive plate (6) is provided at the bottom of the fixing plate (17), the housing (4) is connected with two fixing rods (18) which are respectively provided in parallel on both sides of the fixing plate (17), and two L-shaped blocks (19) are provided above the two conductive contacts (16), the L-shaped blocks (19) comprising a first section (1901) and a second section (1902) which are vertically connected to each other, wherein the ends of the first section (1901) are respectively hinged to the fixing rods (18), and the ends of the two second sections (1902) are mutually abutted and overlapped, the two ends of the fixing plate (17) are vertically connected with connecting blocks (20), the opposite sides of the connecting blocks (20) are both provided with guide columns (21), the first section (1901) is vertically connected with a connecting plate (22), the connecting plate (22) is provided with a waist hole (23), and the guide column (21) is tangential to the inner wall of the waist hole (23) in a sliding manner.

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