CN113539750A

CN113539750A - High-power magnetic latching relay capable of being automatically and manually opened and closed

Info

Publication number: CN113539750A
Application number: CN202110979946.7A
Authority: CN
Inventors: 大河仁忠; 于卫国
Original assignee: Jinan Ruiming Electromechanical Equipment Co ltd
Current assignee: Jinan Ruiming Electromechanical Equipment Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2021-10-22

Abstract

The invention relates to the technical field of electric devices, in particular to a high-power magnetic latching relay capable of being automatically and manually opened and closed.A connecting rod device is movably connected to the right side of an electromagnetic iron core assembly; the connecting rod device comprises an upper connecting rod and a main connecting rod which are hinged, the bottom of the main connecting rod is in transmission connection with a movable conductive plate, a movable contact is arranged below the right end of the movable conductive plate, a static electric contact is correspondingly arranged below the movable contact, the static contact is arranged on the static conductive plate fixed on the right side of the bottom in the shell, and the upper part of the upper connecting rod is in transmission connection with an opening and closing key assembly arranged above the shell. The invention has the beneficial effects that: the distance between the movable contact and the fixed contact of the magnetic latching relay, the contact pressure and the current carrying capacity are effectively improved on the premise of not increasing the size and the cost, and better economic benefit is obtained. The relay and the switch solve the problems that only automatic control does not have the function of manual control on/off and only manual control on/off does not have the function of automatic control at present.

Description

High-power magnetic latching relay capable of being automatically and manually opened and closed

Technical Field

The invention relates to the technical field of electric devices, in particular to a high-power magnetic latching relay capable of being automatically and manually opened and closed.

Background

The hold relay performs an automatic on/off function for an electric circuit, and at present, the magnetic hold relay is driven by generating a forward and reverse electromagnetic force by an electromagnetic coil, driving a movable contact device of a conductive plate by the electromagnetic force, and then holding this state or releasing this state. The contact type switch comprises a conducting strip of a movable contact, a movable reed and the movable contact, wherein the movable reed and the movable contact are riveted or welded together, the conducting strip of the movable contact and the movable reed are riveted or welded at the end of the conducting strip of the movable contact, the connecting contact becomes a fulcrum of the movement of the movable reed, and the movable reed rotates around the fulcrum when stressed to realize the connection and disconnection of a circuit. The movable spring is generally an elastic sheet structure, and is used as a current carrier when the circuit is conducted. When the circuit of the magnetic latching relay is closed, a current flows from the stationary contact to the movable contact, the conductive plate, and the movable reed. Because the internal space of the magnetic latching relay is small, the current-carrying cross section area of the movable spring and the size of the opening distance between the movable contact and the fixed contact are limited. At present, the size of the opening distance between a moving contact and a static contact of a common magnetic latching relay can only meet the requirements of national standard class A (when the rated insulation voltage is between 250V and 380V), namely the electric gap is about 1.5 mm. On the one hand, the current carrying capacity of the movable reed is low, and meanwhile, the safety isolation requirement of the large current carrying capacity and the pressure requirement between the movable contact and the static contact cannot be met. If the switching life, the current carrying capacity, the safety isolation capacity and the pressure between contacts of the magnetic latching relay need to be improved, the magnetic latching relay is large in overall size, and large-size electromagnets and conductive metals are needed, so that the cost is increased, and the application range of the magnetic latching relay is limited. Meanwhile, the movable contact spring and the fixed contact spring are both current carriers, and the current flow directions of the fixed contact spring and the movable contact spring are generally opposite when the circuit is conducted, so that mutually repulsive magnetic fields exist between the fixed contact spring and the movable contact spring to promote the movable contact spring to be quickly separated from the fixed contact spring, but because the magnetic latching relay does not have the arc extinguishing capacity, burning loss or adhesion between the movable contact spring and the fixed contact spring is easily caused when a large current is cut off, the magnetic latching relay loses the working function, and therefore the magnetic latching relay is difficult to be used in an open-close loop of a high-power current (such as more than 100A). In addition, the existing magnetic latching relays are all closed, and normally, the power transmission and cut-off are realized by controlling an external signal to automatically open and close, and the power transmission and cut-off cannot be manually operated, so that the use occasions of products are limited, namely, manual opening and closing cannot be realized, and manual opening and closing cannot be realized.

Disclosure of Invention

The invention provides a high-power magnetic latching relay capable of being automatically and manually opened and closed in order to make up for the defects in the prior art

The invention is realized by the following technical scheme:

the utility model provides a high-power magnetic latching relay that can automatic and manual switching, includes built-in permanent magnet and compression spring's solenoid subassembly, electromagnet core subassembly, dynamic contact, stationary contact and link means, its characterized in that:

the electromagnetic coil assembly with the built-in permanent magnet and the compression spring is arranged on the left side of the middle in the shell, and the right end of the electromagnetic coil assembly is connected with an electromagnetic core assembly;

the right side of the electromagnetic core assembly is movably connected with a connecting rod device;

the connecting rod device comprises an upper connecting rod and a main connecting rod which are hinged, the bottom of the main connecting rod is in transmission connection with a movable conductive plate, a movable contact is arranged below the right end of the movable conductive plate, a static electric contact is correspondingly arranged below the movable contact, the static contact is arranged on the static conductive plate fixed on the right side of the bottom in the shell, and the upper part of the upper connecting rod is in transmission connection with an opening and closing key assembly arranged above the shell.

Further, in order to better realize the invention, the electromagnet core assembly carries out left-right linear reciprocating motion to positive and negative signals of the electromagnet coil assembly through signal wires, a U-shaped driving ring is arranged at the rightmost end of the electromagnet core assembly, and a connecting rod device is arranged at the rear side of the driving ring.

Further, in order to better realize the invention, the link device comprises an upper link and a main link which are hinged through a main connecting shaft, the front side of the main link is provided with a bulge part, the bulge part is limited in the range of the inner ring of the driving ring, the bottom of the main link is rotatably connected with the middle movable connecting part of the movable conductive plate, and the movable torsion spring outside the movable part at the other end of the movable conductive plate is used for supporting the elastic force and the pressure of the movable conductive plate.

Further, in order to better realize the invention, the top end of the upper connecting rod is hinged with the opening and closing key assembly through an upper connecting shaft, the opening and closing key assembly is arranged in the bracket, and an opening and closing torsion spring is arranged between the opening and closing key assembly and the bracket, so that the opening and closing key assembly has a holding force and a resetting force.

Further, in order to realize the present invention, the bottom of the movable conductive plate is connected to a conductive cord, and the other end of the conductive cord is connected to a load-side static conductive plate provided on the left side of the bottom in the housing.

The invention has the beneficial effects that:

because the adopted connecting rod does not need to be long, the distance between the movable contact and the fixed contact of the magnetic latching relay, the contact pressure and the current carrying capacity can be effectively improved on the premise of not increasing the volume and the cost, and the small-volume, low-cost and large-load relay is used for replacing the corresponding large-volume, high-cost and small-load relay, so that better economic benefit can be obtained. The invention can not only automatically control the opening and closing of the electric loop, but also manually open and close the electric loop, thereby greatly increasing the range of the using places of the product, not being limited to external use and internal use of the device, and solving the problems that the prior relay and the switch only have the function of automatic control without manual control and the function of manual control without automatic control.

In addition, the link mechanism of the invention provides certain sliding friction and rolling friction for the movable contact and the fixed contact at the contact moment, so that electric arc dirt, dust and other pollutants generated by opening and closing the contacts on the contact surface can be removed, the temperature rise between the contacts is reduced, the opening and closing service life of the relay is prolonged, and the working reliability of the contacts is further improved.

Drawings

Fig. 1 is a structural diagram of an electric loop closed state of a high-power magnetic latching relay which can be automatically and manually opened and closed according to the present invention;

fig. 2 is a structural view showing an open state of an electric circuit of the high power magnetic latching relay of the present invention which can be opened and closed automatically and manually.

In the figure, the position of the upper end of the main shaft,

1. signal line, 2, electromagnetic coil component, 3, electromagnetic core component, 4, switch key component, 5, switch torsion spring, 6, bracket, 7, upper connecting shaft, 8, upper connecting rod, 9, main connecting shaft, 10, main connecting rod, 11, lug boss, 12, driving ring, 13, movable conductive plate, 14, movable contact, 15, stationary contact, 16, stationary conductive plate, 17, middle movable connecting part, 18, movable torsion spring, 19, other end movable part, 20, conductive flexible wire, 21, load side stationary conductive plate, 22 and shell.

Detailed Description

The technical solution 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. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should be noted that the terms "disposed," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 1 and 2 show an embodiment of the present invention, which is a high-power magnetic latching relay capable of being opened and closed automatically and manually, and is provided with a housing 22, and a stationary contact 15 is arranged at the bottom in the housing 22 through a stationary conductive guide 16. As shown in the closed state of fig. 1, a current flows to the load through the static conductive plate 16, the static contact 15, the movable contact 14, the movable conductive plate 13, the conductive cord 20, and the load-side static conductive plate 21. Fig. 2 shows an open state of the electric circuit, in which the current on the static conductive plate 16 is separated by the passive contact 14 and the static contact 15, so that the current does not flow into the load-side static conductive plate 21. The linkage device consists of an upper connecting rod 8 and a main connecting rod 10, wherein the upper connecting rod 8 and the main connecting rod 10 are connected through a main connecting shaft 9, and a limit (not shown in the figure) is arranged between the upper connecting rod 8 and the main connecting rod 10. Meanwhile, the other end of the upper connecting rod 8 is connected with the opening and closing key assembly 4 through an upper connecting shaft 7, the opening and closing key assembly 4 is arranged in the bracket 6, and an opening and closing torsion spring 5 is arranged between the opening and closing key assembly 4 and the bracket, so that the opening and closing key assembly 4 has a holding force and a resetting force.

The movable contact 14 is disposed under one end of the movable conductive plate 13 and is movably connected to the middle movable connecting portion 17 and the other end movable portion 19 of the movable conductive plate 13, the movable contact 14 of the movable conductive plate 13 can move up and down and rotate around the other end movable portion 19, and the movable torsion spring 18 outside the other end movable portion 19 of the movable conductive plate 13 is used for supporting the elastic force and pressure of the movable conductive plate 13. The movement of the electromagnet core component 3 is to make the straight reciprocating movement of the positive and negative signals of the electromagnetic coil through the signal wire 1, and make the driving ring 12 of the electromagnet core component 3 give an impact force or a pulling force to the convex part 12 of the main connecting rod. The forced main link 10 generates swing and rotation movement to cause the movable conductive plate 13 to move, and the movable contact 14 contacts the static contact 15 to make or break the electric circuit.

The moving contact 14 of the above-mentioned movable conductive plate 13 can move up and down and make rotary motion around the other end movable part 19, when the loop is cut off, there is a greater distance between moving contact 14 and moving contact 15, far greater than the contact interval (1.5 mm) of the general magnetic latching relay (60A) at present, make the electric arc produced extinguish and difficult to burn the contact.

The movable conductive plate 13 is made of general brass, and the elastic force and the repulsive force of the movable conductive plate 13 are generated by the movable torsion spring 18 and the opening and closing torsion spring 5, and have more reliable repulsive force and holding force than the current movable spring piece using copper spring.

In addition, when the movable contact 14 and the fixed contact 15 are in contact with each other at the moment, because the main connecting rod swings and rotates, the movable contact 14 generates certain sliding friction and rolling friction on the surface of the fixed contact, so that pollutants such as arc dirt, dust and the like generated by the opening and closing of the contacts on the surface of the contact can be removed, the temperature rise between the contacts is reduced, the opening and closing service life of the relay is prolonged, and the reliability of the operation of the contacts is further improved.

Above and inside the above-mentioned housing 22, there are provided an opening and closing key assembly 4 and a holder 6, the opening and closing key assembly 4 is disposed in the holder 6, an opening and closing torsion spring 5 is disposed between the opening and closing key assembly 4 and the holder 6, and the opening and closing key assembly 4 is connected to an upper link 8 by an upper connecting shaft 7. The upper link 8 is connected to the main link 10, and for this reason, the rightward and leftward rotation of the opening/closing key assembly 4 makes it possible to close and open the movable contact 14 and the stationary contact 15, so that the opening/closing of the manual electric circuit is achieved.

When the movable contact 14 and the stationary contact 15 are closed, a pulling force (automatic) generated by the electromagnet core assembly 3 or a torsion (manual) generated by the opening/closing key assembly 4 acts on the link mechanism. In the swinging and rotating motion of the upper link 8 and the main link 10, the upper link 8 and the main link 10 form a straight line, that is, reach a dead point position where the contact pressure between the movable contact 14 and the stationary contact 15 is maximized, after which the link mechanism is locked, and the contacts are in a closed state (closed state).

When the movable contact 14 and the stationary contact 15 are opened, a pushing force (automatic) mainly generated by the electromagnet core assembly 3 or a torsion (manual) generated by the opening/closing key assembly 4 acts on the link mechanism. The upper link 8 and the main link 10 are swiftly swung and rotated to swiftly move the movable contact 14 away from the stationary contact 15, and thereafter both contacts are opened (disconnected).

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high-power magnetic latching relay capable of being automatically and manually opened and closed comprises an electromagnetic coil assembly (2) with a built-in permanent magnet and a compression spring, an electromagnetic core assembly (3), a movable contact (14), a static contact (15) and a connecting rod device, and is characterized in that:

the electromagnetic coil component (2) with the built-in permanent magnet and the compression spring is arranged on the left side of the middle inside the shell (22), and the right end of the electromagnetic coil component (2) is connected with an electromagnetic core component (3);

the right side of the electromagnetic core assembly (3) is movably connected with a connecting rod device;

the connecting rod device comprises an upper connecting rod (8) and a main connecting rod (10) which are hinged, the bottom of the main connecting rod (10) is in transmission connection with a movable conductive plate (13), a movable contact (14) is arranged below the right end of the movable conductive plate (13), a static contact (15) is correspondingly arranged below the movable contact (14), the static contact (15) is arranged on a static conductive plate (16) fixed on the right side of the bottom in a shell (22), and the upper part of the upper connecting rod (8) is in transmission connection with an opening and closing key assembly (4) arranged above the shell (22).

2. The high-power magnetic latching relay capable of being automatically and manually opened and closed according to claim 1, wherein:

the electromagnetic coil assembly (2) is driven by the electromagnetic core assembly (3) to do left-right linear reciprocating motion through positive and negative signals of the signal wire (1), a U-shaped driving ring (12) is arranged at the rightmost end of the electromagnetic core assembly (3), and a connecting rod device is arranged on the rear side of the driving ring (12).

3. The high-power magnetic latching relay capable of being automatically and manually opened and closed according to claim 2, wherein:

the connecting rod device comprises an upper connecting rod (8) and a main connecting rod (10) which are hinged through a main connecting shaft (9), a protruding portion (13) is arranged on the front side of the main connecting rod (10), the protruding portion (13) is limited in the inner ring range of a driving ring (12), the bottom of the main connecting rod (10) is rotatably connected with a middle movable connecting portion (17) of a movable conductive plate (13), and a movable torsion spring (18) on the outer side of a movable portion (19) at the other end of the movable conductive plate (13) is used for supporting the elastic force and the pressure of the movable conductive plate (13).

4. The high-power magnetic latching relay capable of being automatically and manually opened and closed according to claim 3, wherein:

the top end of the upper connecting rod (8) is hinged with the opening and closing key assembly (4) through an upper connecting shaft (7), the opening and closing key assembly (4) is arranged in the support (6), and an opening and closing torsion spring (5) is arranged between the opening and closing key assembly (4) and the support (6), so that the opening and closing key assembly (4) has retaining force and resetting force.

5. The high-power magnetic latching relay capable of being automatically and manually opened and closed according to claim 1, wherein:

the bottom of the movable conductive plate (13) is connected with a conductive cord (20), and the other end of the conductive cord (20) is connected with a load side static conductive plate (21) arranged on the left side of the inner bottom of the shell (22).