A power safety intelligent control switch

Abstract

The utility model discloses a power safety intelligent control switch, including a housing, a control module arranged in the housing, a first contact bridge, a second contact bridge, and a first terminal and a second terminal partially arranged in the housing, the control module is used to control the first contact bridge and the second contact bridge to move up and down in the housing, a bridge plate is arranged in the housing and is provided with a first contact point and a second contact point, one end of the second contact bridge and the second contact point form a group of normally closed contacts, the other end of the second contact bridge and the second terminal form another group of normally closed contacts, the two ends of the first contact bridge can be electrically connected to the first contact point and the first terminal respectively, and the control module includes an arc extinguishing element for extinguishing the arc when the switch executes a connection or disconnection instruction. The utility model solves the problem of short circuit fire by setting two electromagnetic switches in series, when one electromagnetic switch is adhered or catches fire, the other electromagnetic switch executes a disconnection instruction.

Description

Technical Field

[0001] The utility model relates to the technical field of power switches, and more specifically to a power safety intelligent control switch used in automobiles. Background Art

[0002] The automobile emergency power switch is mainly used as the power switch of heavy trucks. In an emergency, it can quickly and safely disconnect the power supply of the vehicle body to reduce risks. The existing power switch has the following defects: First, the traditional power switch generates arcs, and the exposed arcs will cause the risk of explosion of hazardous chemical transport vehicles; second, when the traditional power switch is stuck, it will cause the risk of product fire, and the fire will cause the hazardous chemical transport vehicle to explode. Summary of the invention

[0003] The utility model overcomes the shortcomings of the prior art and provides a power safety intelligent control switch. By setting two electromagnetic switches connected in series, when one electromagnetic switch is adhered or catches fire, the other electromagnetic switch executes a disconnection instruction, thereby solving the problem of circuit short circuit fire.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A power safety intelligent control switch comprises a shell, a control module arranged in the shell, a first contact bridge, a second contact bridge, and a first terminal and a second terminal partially arranged in the shell, wherein the control module is used to control the first contact bridge and the second contact bridge to move up and down in the shell, and further comprises: a bridging plate, which is arranged in the shell and has a first contact point and a second contact point thereon, one end of the second contact bridge and the second contact point form a group of normally closed contacts, and the other end of the second contact bridge and the second terminal form another group of normally closed contacts, the two ends of the first contact bridge can be electrically connected to the first contact point and the first terminal respectively, and the control module comprises an arc extinguishing element for extinguishing the arc when the switch executes an on or off instruction.

[0006] As a preferred technical solution of the utility model, the control module includes a circuit board, on which a processor and the arc extinguishing element are arranged, the arc extinguishing element is a MOS tube, the bridge plate is electrically connected to the gate of the MOS tube through a pin, the first terminal is electrically connected to the source or drain of the MOS tube through a pin, and correspondingly, the second terminal is electrically connected to the drain or source of the MOS tube through a pin, and the processor is used to control the connection or disconnection of the first contact bridge and the bridge plate, and the connection or disconnection of the second contact bridge and the bridge plate.

[0007] As a preferred technical solution of the utility model, the first terminal, the first contact bridge, the bridging plate, the second contact bridge and the second terminal are in the same loop.

[0008] As a preferred technical solution of the utility model, it also includes a first electromagnetic switch and a second electromagnetic switch arranged in the shell, and the first electromagnetic switch and the second electromagnetic switch respectively drive the first contact bridge and the second contact bridge to be electrically connected to the bridge plate.

[0009] As a preferred technical solution of the utility model, the first electromagnetic switch and the second electromagnetic switch are arranged side by side in the housing, and the first contact bridge and the second contact bridge are located at the same height.

[0010] As a preferred technical solution of the utility model, the shell includes a cover body and a base body, the circuit board and the main bodies of the two electromagnetic switches are positioned in the cover body, and the first terminal and the second terminal are positioned in the base body.

[0011] As a preferred technical solution of the utility model, a receiving groove is provided on the seat body, and the bridging plate is positioned and placed in the receiving groove.

[0012] As a preferred technical solution of the utility model, positioning holes for the terminal posts to pass through are provided on both sides of the seat body, and two positioning grooves are provided above the corresponding positioning holes. The two positioning grooves are respectively adapted to the first contact bridge and the second contact bridge, and the two positioning grooves are located on both sides above the accommodating groove.

[0013] As a preferred technical solution of the utility model, a cover body is provided on the cover body at one side of the circuit board, and a connector electrically connected to the circuit board is provided on the cover body.

[0014] As a preferred technical solution of the utility model, a plurality of buckling strips are arranged on the seat body at positions corresponding to the first electromagnetic switch and the second electromagnetic switch, and each buckling strip is buckled on the bottom plate of the U-shaped magnetic conductive plate.

[0015] In summary, the beneficial effects of the utility model are as follows: the switch adopts the principle of MOS tube and electromagnetic mechanical structure, has the characteristics of no arc, long life, double insurance, large current, low power consumption, etc., and plays the role of double insurance through two bistable switches;

[0016] The MOS tube plays a role in transitional arc elimination when the switch is connected or disconnected. When the switch executes the connection command, the high-power MOS tube is first used to work for an ultra-short time (less than 200ms). After the MOS tube is connected, the electromagnetic switch drives the contact bridge to be electrically connected to the bridge plate to close the loop, and then the MOS tube is immediately closed; when the switch executes the disconnection command, the MOS tube is connected, the contact bridge of the electromagnetic switch is disconnected from the bridge plate, and then the MOS tube is immediately closed (the disconnection of the contact bridge and the on-off of the MOS tube are controlled within 200ms). The utility model achieves the effect of no arc during the switch connection or disconnection process by using the high-power MOS tube in conjunction with the mechanical structure of the electromagnetic switch;

[0017] The arc generated when the traditional switch is turned on and off will cause the contacts to be corroded by electricity, which will seriously cause the two ends of the contact bridge to adhere to the bridge plate and the terminal and cannot be separated. The utility model has an arc extinguishing function, so the above situation can be avoided and the service life can be increased;

[0018] Two electromagnetic switches are connected in series and combined with automatic detection of the circuit board module. The processor identifies the MOS tube voltage, loop voltage and external abnormal voltage. When the voltage is abnormal, the electromagnetic switch is started to connect or disconnect the contact bridge and the bridge plate. When the contact bridge of one of the electromagnetic switches is adhered to the bridge plate or catches fire, the other switch executes the disconnection command, which plays a double insurance role and can solve the problem of loop short circuit and fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of a specific embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram reflecting the seat body and two bistable switches in a specific embodiment of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a seat body and two contact bridges according to a specific embodiment of the utility model;

[0023] Figure 5 It is a structural schematic diagram reflecting the seat body of a specific embodiment of the utility model.

[0024] Figure numerals: 1, shell; 11, cover; 12, base; 121, accommodating groove; 122, positioning hole; 123, positioning groove; 124, snap-fit ​​strip; 13, cover; 131, socket; 2, circuit board; 3, first terminal; 4, second terminal; 5, first electromagnetic switch; 51, first contact bridge; 6, second electromagnetic switch; 61, second contact bridge; 7, bridge plate; 71, first contact point; 72, second contact point; 8, pin; 9, U-shaped magnetic conductive plate. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0026] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 5 A power safety intelligent control switch shown in the figure includes a shell 1, a control module arranged in the shell 1, a first contact bridge 51, a second contact bridge 61, and a first terminal 3 and a second terminal 4 partially arranged in the shell 1. The control module is used to control the first contact bridge 51 and the second contact bridge 61 to move up and down in the shell 1, and also includes: a bridging plate 7, which is arranged in the shell 1 and has a first contact point 71 and a second contact point 72 thereon, one end of the second contact bridge 61 and the second contact point 72 form a group of normally closed contacts, and the other end of the second contact bridge 61 and the second terminal 4 form another group of normally closed contacts, the two ends of the first contact bridge 51 can be electrically connected to the first contact point 71 and the first terminal 3 respectively, and the control module includes an arc extinguishing element for extinguishing the arc when the switch executes an on or off instruction.

[0028] The MOS tube plays a role in extinguishing the arc when the switch is connected or disconnected. When the switch executes the connection command, the high-power MOS tube is first used to work for an ultra-short time (less than 200ms), the MOS tube is first connected, and then the electromagnetic switch drives the contact bridge to be electrically connected to the bridge plate 7 to close the loop, and then the MOS tube is immediately closed. When the switch executes the disconnection command, the MOS tube is connected, the contact bridge of the electromagnetic switch is disconnected from the bridge plate 7, and then the MOS tube is immediately closed (the disconnection of the contact bridge and the connection and disconnection of the MOS tube are controlled within 200ms). The utility model achieves the effect of no arc during the connection or disconnection of the switch through the high-power MOS tube and the mechanical structure of the electromagnetic switch; the arc generated when the traditional switch is turned on and off will cause the contacts to be corroded by electricity, and in severe cases, the two ends of the contact bridge will adhere to the bridge plate and the terminal and cannot be separated. The utility model has an arc extinguishing function, so the above situation can be avoided and the service life can be improved. The utility model has an arc extinguishing function, so the above situation can be avoided and the service life can be improved.

[0029] The control module includes a circuit board 2, on which a processor (a chip, not shown in the figure, is a prior art and therefore not specifically described) and an arc extinguishing element are provided. The arc extinguishing element is a MOS tube (not shown in the figure). The bridge plate 7 is electrically connected to the gate of the MOS tube through a pin 8, and the first terminal 3 is electrically connected to the source or drain of the MOS tube through the pin 8. Correspondingly, the second terminal 4 is electrically connected to the drain or source of the MOS tube through the pin 8. The processor is used to control the connection or disconnection of the first contact bridge 51 and the bridge plate 7, and the connection or disconnection of the second contact bridge 61 and the bridge plate 7.

[0030] The first terminal 3 , the first contact bridge 51 , the bridge plate 7 , the second contact bridge 61 and the second terminal 4 are in the same loop.

[0031] It also includes a first electromagnetic switch 5 and a second electromagnetic switch 6 arranged in the shell 1. The first electromagnetic switch 5 and the second electromagnetic switch 6 respectively drive the first contact bridge 51 and the second contact bridge 61 to be electrically connected to the bridge plate 7. The first electromagnetic switch 5 and the second electromagnetic switch 6 are arranged side by side in the shell 1, and the first contact bridge 51 and the second contact bridge 61 are located at the same height (that is, located on the same horizontal plane, and the lower ends are preferably arranged flush).

[0032] When one of the electromagnetic switches is stuck (caused by assembly problems or MOS failure) or catches fire due to a short circuit, the circuit board 2 module automatically detects and the processor identifies the MOS tube voltage, loop voltage and external abnormal voltage. When the voltage is abnormal, the other electromagnetic switch is started to disconnect the contact bridge from the bridge board 7, so that the control switch performs the disconnection operation, which plays a double insurance role and can solve the problem of loop short circuit and fire.

[0033] The two ends of the contact bridge of the second electromagnetic switch 6 and the second terminal 4 and the second contact point 72 form two groups of normally closed contacts when the first electromagnetic switch 5 is working normally. When the first electromagnetic switch 5 is working abnormally, the processor controls the two groups of normally closed contacts of the second electromagnetic switch 6 to be disconnected after identifying the MOS tube voltage, the loop voltage and the external abnormal voltage. Specifically, the coil winding in the electromagnetic switch is applied with an instantaneous voltage. Under the action of the energized coil, the moving iron core in the hollow casing will slide toward the static iron core, and the static iron core remains stationary and fixed in the hollow casing. The contact bridge also slides with the moving iron core, so that the contact bridge is connected or disconnected with the bridge plate 7. The electromagnetic switch in this embodiment adopts a bistable switch or other electromagnetic switches with the same function. This is a prior art and can be purchased on the market according to actual conditions. Therefore, the specific structure is not marked in the figure.

[0034] The two bistable switches adopt an electromagnetic mechanical structure, which has dual stable states of stable conduction and stable disconnection. The coil does not need to be continuously powered and the coil does not generate heat, ensuring the dynamic balance between the internal temperature of the switch and the external ambient temperature. Especially in extremely cold and harsh environments, the switches can be turned on and off normally, solving the problem of cars not being able to start normally in extremely cold environments in the industry.

[0035] The shell 1 includes a cover body 11 and a base body 12, the circuit board 2 and the main body of the two electromagnetic switches are positioned and placed in the cover body 11, the first terminal 3 and the second terminal 4 are positioned and placed in the base body 12; a receiving groove 121 is provided on the base body 12, and the bridging plate 7 is positioned and placed in the receiving groove 121; positioning holes 122 for the terminals to pass through are provided on both sides of the base body 12, and two positioning grooves 123 are respectively provided above the corresponding positioning holes 122, and the two positioning grooves 123 are respectively adapted to the first contact bridge 51 and the second contact bridge 61, and the two positioning grooves 123 are located on both sides above the receiving groove 121.

[0036] The cover body 11 can realize the positioning of the two bistable switch bodies, and the two contact bridges can be moved into the positioning grooves 123 and abut against the bridge plate 7 and the terminal. The arrangement of the positioning grooves 123, the positioning holes 122 and the receiving grooves 121 ensures good positioning of the bridge plate 7 and ensures the stability of the contact bridges in contact with the bridge plate 7 and the terminal.

[0037] A cover body 13 is provided on the cover body 11 on one side of the circuit board 2. The cover body 13 is provided with a connector 131 electrically connected to the circuit board 2. The connector 131 is electrically connected to the circuit board 2 to supply power to the circuit board 2, and the setting of the cover body 13 achieves better positioning of the circuit board 2.

[0038] A plurality of snap-fitting strips 124 are provided on the seat body 12 at positions corresponding to the first electromagnetic switch 5 and the second electromagnetic switch 6. Each snap-fitting strip 124 is snap-fitted to the bottom plate of the U-shaped magnetic conductive plate 9. The snap-fitting strips 124 are specifically provided in eight numbers, and each group of four is snap-fitted to the corresponding U-shaped magnetic conductive plate 9. This ensures the connection stability between the seat body 12 and the two dual-stable switches and facilitates assembly.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only preferred examples of the utility model, and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A power safety intelligent control switch, comprising a housing (1), a control module arranged in the housing (1), a first contact bridge (51), a second contact bridge (61), and a first terminal (3) and a second terminal (4) partially arranged in the housing (1), wherein the control module is used to control the first contact bridge (51) and the second contact bridge (61) to move up and down in the housing (1), characterized in that: Also includes: A bridge plate (7) is arranged in a housing (1) and is provided with a first contact point (71) and a second contact point (72); one end of the second contact bridge (61) and the second contact point (72) form a group of normally closed contacts; the other end of the second contact bridge (61) and the second terminal (4) form another group of normally closed contacts; the two ends of the first contact bridge (51) can be electrically connected to the first contact point (71) and the first terminal (3) respectively; and the control module comprises an arc extinguishing element for extinguishing an arc when the switch executes an on or off instruction.

2. A power safety intelligent control switch according to claim 1, characterized in that: The control module comprises a circuit board (2), on which a processor and the arc extinguishing element are arranged, the arc extinguishing element being a MOS tube, the bridge plate (7) being electrically connected to the gate of the MOS tube via a pin (8), the first terminal (3) being electrically connected to the source or drain of the MOS tube via a pin (8), and correspondingly, the second terminal (4) being electrically connected to the drain or source of the MOS tube via a pin (8), and the processor being used to control the connection or disconnection of the first contact bridge (51) and the bridge plate (7), and the connection or disconnection of the second contact bridge (61) and the bridge plate (7).

3. A power safety intelligent control switch according to claim 1 or 2, characterized in that: The first terminal (3), the first contact bridge (51), the bridge plate (7), the second contact bridge (61) and the second terminal (4) are in the same loop.

4. A power safety intelligent control switch according to claim 2, characterized in that: It also comprises a first electromagnetic switch (5) and a second electromagnetic switch (6) which are arranged in the housing (1); the first electromagnetic switch (5) and the second electromagnetic switch (6) respectively drive the first contact bridge (51) and the second contact bridge (61) to be electrically connected to the bridge plate (7).

5. A power safety intelligent control switch according to claim 4, characterized in that: The first electromagnetic switch (5) and the second electromagnetic switch (6) are arranged side by side in the housing (1), and the first contact bridge (51) and the second contact bridge (61) are located at the same height.

6. A power safety intelligent control switch according to claim 4, characterized in that: The housing (1) comprises a cover (11) and a base (12); the circuit board (2) and the main bodies of the two electromagnetic switches are positioned in the cover (11); and the first terminal (3) and the second terminal (4) are positioned in the base (12).

7. The power safety intelligent control switch according to claim 6, characterized in that: The seat body (12) is provided with a receiving groove (121), and the bridging plate (7) is positioned and disposed in the receiving groove (121).

8. The power safety intelligent control switch according to claim 7, characterized in that: Positioning holes (122) for the terminal posts to pass through are arranged on both sides of the seat body (12), and two positioning grooves (123) are arranged above the corresponding positioning holes (122). The two positioning grooves (123) are respectively matched with the first contact bridge (51) and the second contact bridge (61), and the two positioning grooves (123) are located on both sides above the accommodating groove (121).

9. The power safety intelligent control switch according to claim 6, characterized in that: A cover body (13) is provided on the cover body (11) at one side of the circuit board (2), and a connector (131) electrically connected to the circuit board (2) is provided on the cover body (13).

10. The power safety intelligent control switch according to claim 6, characterized in that: A plurality of buckling strips (124) are arranged on the seat body (12) at positions corresponding to the first electromagnetic switch (5) and the second electromagnetic switch (6), and each buckling strip (124) is buckled onto the bottom plate of the U-shaped magnetic conductive plate (9).

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