Power-off protection device and control circuit

Abstract

The utility model provides a power-off protection device and a control circuit, the power-off protection device is used for cutting off electrical connection between an input end and an output end of a conductive part, the power-off protection device comprises a shell part, an action part and an excitation part, and the shell part is provided with a hollow cavity; the action part is movably accommodated in the hollow cavity, and the action part can extend out of the hollow cavity; and at least part of the excitation part is accommodated in the hollow cavity, and the excitation part is used for driving the action part to act, so that the action part cuts off the electric connection between the input end and the output end of the conductive part. According to the power-off protection device and the control circuit provided by the invention, the phenomena of out-of-control of the circuit and electric control fire can be reduced, and the safety performance of the circuit can be improved.

Description

Technical Field

[0001] This application belongs to the technical field of power-off protection, and particularly relates to a power-off protection device and a control circuit. Background Art

[0002] With the rapid development of new energy vehicles, the technology of high-efficiency and high-density electric drive assemblies has gradually matured. However, in the case of overload, overvoltage, too high temperature, external electromagnetic interference, etc., the circuit is prone to short circuit, resulting in high speed of the electric drive assembly, and then generating a huge back electromotive force, which is extremely likely to cause circuit out-of-control and electric control fire, seriously affecting driving safety. Utility Model Content

[0003] For the deficiencies of the existing technology, this application provides a power-off protection device and a control circuit, which can reduce the occurrence of circuit out-of-control and electric control fire, and thus is beneficial to improving the circuit safety performance.

[0004] On the one hand, this application provides a power-off protection device for cutting off the electrical connection between the input end and the output end of a conductive component. The power-off protection device includes:

[0005] A housing component having a hollow cavity;

[0006] An actuating component movably received in the hollow cavity, and the actuating component can extend out of the hollow cavity; and

[0007] An excitation component at least partially received in the hollow cavity, and the excitation component is used to drive the actuating component to act so that the actuating component cuts off the electrical connection between the input end and the output end of the conductive component.

[0008] In a possible implementation manner, the actuating component includes a first actuating member and a second actuating member; the excitation component is disposed between the first actuating member and the second actuating member; the first actuating member and the second actuating member are used to cut off the input ends and output ends of at least two conductive components under the action of the excitation component.

[0009] In a possible implementation manner, the hollow cavity has a first opening and a second opening oppositely disposed along a first direction of the housing component; the first actuating member is received in the hollow cavity, the second actuating member is received in the hollow cavity, and the first actuating member and the second actuating member are spaced apart; the excitation component is used to drive at least a part of the first actuating member to extend out of the first opening, and the excitation component is further used to drive at least a part of the second actuating member to extend out of the second opening.

[0010] In a possible implementation, the excitation component includes an explosive member and a detonating member. The detonating member is used to detonate the explosive member. The explosive member is located between the first actuating member and the second actuating member, and the explosive member is used to generate an air flow for driving the first actuating member and driving the second actuating member.

[0011] In a possible implementation, the excitation component further includes a fixing base. The fixing base is disposed in the hollow cavity and is used to fix the explosive member.

[0012] In a possible implementation, the power-off protection device further includes a flow splitting component. The flow splitting component is received in the hollow cavity and is located between the first actuating member and the second actuating member. The flow splitting component is used to split the air flow generated after the explosive member is detonated.

[0013] In a possible implementation, the flow splitting component includes a first flow splitting surface and a second flow splitting surface. The first flow splitting surface and the second flow splitting surface are symmetrically disposed along a second direction of the housing component. The second direction is perpendicular to the first direction.

[0014] In a possible implementation, the power-off protection device further includes a first sealing portion. The first sealing portion is disposed between the first actuating member and the inner wall of the hollow cavity; and / or, the power-off protection device further includes a second sealing portion. The second sealing portion is disposed between the second actuating member and the inner wall of the hollow cavity.

[0015] In a possible implementation, the first actuating member has a first groove and a first depression. The opening of the first groove faces the second actuating member, and the first depression is disposed on the peripheral edge of the opening of the first groove; and / or, the second actuating member has a second groove and a second depression. The opening of the second groove faces the first actuating member, and the second depression is disposed on the peripheral edge of the opening of the second groove.

[0016] In a possible implementation, the housing component includes a sleeve and an outer shell. The hollow cavity is disposed in the sleeve, and the outer shell is sleeved outside the sleeve.

[0017] In a possible implementation, the housing component further includes an explosion-proof tube. The explosion-proof tube is sleeved outside the sleeve, and the outer shell is sleeved outside the explosion-proof tube.

[0018] In a possible implementation, the housing component further includes a pin; the housing component further has a pressure relief hole. The pressure relief hole penetrates through the explosion-proof tube and the sleeve and communicates with the hollow cavity. The pin is movably disposed in the pressure relief hole.

[0019] In a possible implementation, the housing component further includes a first limiting member, which is installed on the sleeve and located at the first opening of the hollow cavity. The first limiting member is used to prevent the first actuating member from falling off from the first opening of the hollow cavity; and / or, the housing component further includes a second limiting member, which is installed on the sleeve and located at the second opening of the hollow cavity. The second limiting member is used to prevent the second actuating member from falling off from the second opening of the hollow cavity.

[0020] In a possible implementation, a plugging portion protrudes from the outer shell, and the detonating member passes through the plugging portion. The plugging portion is used to connect the detonating member with an external detonation signal.

[0021] On the other hand, the present application provides a control circuit, including:

[0022] The above-mentioned power-off protection device;

[0023] A mounting base, on which the power-off protection device is installed; and

[0024] A conductive component, which is installed on the mounting base. The power-off protection device is used to cut off the electrical connection between the input end and the output end of the conductive component.

[0025] In a possible implementation, the conductive component includes a first conductive member, a second conductive member and a third conductive member. The first conductive member, the second conductive member and the third conductive member are all installed on the mounting base. The power-off protection device is used to cut off at least two of the first conductive member, the second conductive member and the third conductive member.

[0026] In a possible implementation, the power-off protection device is used to cut off the first conductive member and the third conductive member; a first notch is provided on the first conductive member, and a second notch is provided on the third conductive member. The power-off protection device is used to cut off the first conductive member at the position of the first notch and cut off the third conductive member at the position of the second notch.

[0027] The power-off protection device and the control circuit provided by the present application drive the actuating member to act through the excitation member in the housing component, so that the actuating member cuts off the electrical connection between the input end and the output end of the conductive component, thereby causing the circuit formed by the conductive component to lose power, which can reduce the occurrence of circuit out-of-control and electrically controlled fire, and thus is beneficial to improving the circuit safety performance. Description of the Drawings

[0028] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments provided by the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a partial structural diagram of a control circuit in a connected state provided by an embodiment of the present application;

[0030] Figure 2 It is a partial structural diagram of a control circuit in a cut-off state provided by an embodiment of the present application;

[0031] Figure 3 It is a structural diagram of a power-off protection device provided by the first embodiment of the present application;

[0032] Figure 4 is Figure 3 A cross-sectional view of the power-off protection device shown;

[0033] Figure 5 It is a structural diagram of a power-off protection device provided by the second embodiment of the present application;

[0034] Figure 6 is Figure 5 A cross-sectional view of the power-off protection device shown;

[0035] Figure 7 It is a structural diagram of a power-off protection device from the first perspective provided by the third embodiment of the present application;

[0036] Figure 8 It is a structural diagram of a power-off protection device from the second perspective provided by the third embodiment of the present application;

[0037] Figure 9 It is a structural diagram of a power-off protection device from the first perspective provided by the fourth embodiment of the present application;

[0038] Figure 10 It is a structural diagram of a power-off protection device from the second perspective provided by the fourth embodiment of the present application. Detailed implementation manners

[0039] Next, the technical solutions of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0040] The descriptions of the following embodiments refer to the attached drawings, which illustrate specific embodiments in which the present application can be implemented. Directional terms mentioned in the description of the present application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "top surface", "side surface", "bottom surface", "top wall", "side wall", "bottom wall", "inner side wall", "outer side wall", "length direction", "width direction", "height direction", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer illustration and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In the description of the present application, for example, "first", "second", "third", "fourth", etc. are only used to distinguish the described objects and do not have any sequential or technical meaning. In the description of the present application, the "connection" and "coupling" involved, unless otherwise specified, both include direct connection (coupling) and indirect connection (coupling).

[0041] Please refer to Figure 1 and Figure 2 , Figure 1 which is a partial structure diagram of a control circuit in a connected state provided by an embodiment of the present application, Figure 2 and which is a partial structure diagram of a control circuit in a cut-off state provided by an embodiment of the present application.

[0042] The present application provides a control circuit 1000. The control circuit 1000 includes a power-off protection device 100, a mounting base 200, and a conductive component 300. The power-off protection device 100 and the conductive component 300 are both mounted on the mounting base 200. The power-off protection device 100 is used to cut off the electrical connection between the input end and the output end of the conductive component 300.

[0043] Among them, the power-off protection device 100 includes a first state and a second state. The input end of the conductive component 300 is used to be electrically connected to the power supply end, and the output end of the conductive component 300 is used to be electrically connected to the load. When the power-off protection device 100 is in the first state, the power-off protection device 100 is spaced apart from the conductive component 300. At this time, the control circuit 1000 is in the connected state as shown in Figure 1 , and the control circuit 1000 can electrically connect the power supply and the load. When the power-off protection device 100 is in the second state, the power-off protection device 100 contacts the conductive component 300, and the power-off protection device 100 cuts off the conductive component 300, so that the input end and the output end of the conductive component 300 are disconnected. At this time, the control circuit 1000 is in the state as shown in Figure 2In the shown cut-off state, the power supply connected to the control circuit 1000 is disconnected from the load. Taking the control circuit 1000 applied to a motor as an example, the input end of the conductive component 300 is used to carry alternating current, and the other end of the conductive component 300 is connected to the motor so that the motor operates under the action of the alternating current.

[0044] Please refer to Figure 1 and Figure 2 , in some embodiments, a sensor is provided on the control circuit 1000. The sensor is used to sense the real-time change of the current on the conductive component 300, and further enables the controller to send a signal to the power-off protection device 100. When the sensor senses that the current on the conductive component 300 is abnormal, the controller sends a signal to the power-off protection device 100, so that the power-off protection device 100 switches from the first state to the second state, and further enables the power-off protection device 100 to cut off the electrical connection between the input end and the output end of the conductive component 300. Exemplarily, the current abnormal signal includes but is not limited to that the current signal on the conductive component 300 is greater than 1.75 A / ms or the current signal on the conductive component 300 is greater than 1.5 A / 2 ms, etc. The specific value of the current abnormal signal can be set according to the specific applied circuit, and the present application does not limit this.

[0045] Please refer to Figure 1 and Figure 2 , in some embodiments, when the control circuit 1000 is applied to a high-voltage environment, the control circuit 1000 further includes an arc-extinguishing fuse. The arc-extinguishing fuse is connected in parallel with the conductive component 300, that is, one end of the arc-extinguishing fuse is connected to the input end of the conductive component 300, and the other end of the arc-extinguishing fuse is connected to the output end of the conductive component 300. The arc-extinguishing fuse is used to extinguish the arc of the conductive component 300 after being cut off, and can reduce the arc interference between the input end and the output end of the cut-off conductive component 300. Among them, the capacity and rated voltage of the arc-extinguishing fuse can be set according to the arc-extinguishing environment, and the present application does not limit this.

[0046] Please refer to Figure 1 and Figure 2 , in some embodiments, taking the control circuit 1000 applied to a motor as an example, the input end of the conductive component 300 is used to carry alternating current, and the other end of the conductive component 300 is connected to the motor so that the motor operates under the action of the alternating current. The conductive component 300 includes a first conductive member 301, a second conductive member 302, and a third conductive member 303. The first conductive member 301, the second conductive member 302, and the third conductive member 303 are all installed on the mounting seat 200. The power-off protection device 100 is used to cut off at least two of the first conductive member 301, the second conductive member 302, and the third conductive member 303.

[0047] Among them, the input ends of the first conductive member 301, the second conductive member 302, and the third conductive member 303 are respectively connected to the three phases A, B, and C formed by the power supply, and the output ends of the first conductive member 301, the second conductive member 302, and the third conductive member 303 are respectively connected to the three power terminals U, V, and W of the motor, so that the current output by the power supply flows through the first conductive member 301, the second conductive member 302, and the third conductive member 303 to the motor.

[0048] Please refer to Figure 1 and Figure 2 In a specific embodiment, the first conductive member 301 and the third conductive member 303 are arranged side by side, and the extending directions of the first conductive member 301 and the third conductive member 303 are the same. The second conductive member 302 is arranged on the same side of the first conductive member 301 and the third conductive member 303, and the extending direction of the second conductive member 302 is the same as the extending direction of the first conductive member 301 and the extending direction of the third conductive part. The power-off protection device 100 is installed on the mounting seat 200 and is located between the first conductive member 301 and the third conductive member 303. When the power-off protection device 100 switches from the first state to the second state, the power-off protection device 100 simultaneously cuts off the first conductive member 301 and the third conductive member 303, and the electrical connection between the input end and the output end of the conductive component 300 is disconnected, thereby realizing power-off protection for the power supply and the load.

[0049] It can be understood that in some other embodiments, the power-off protection device 100 is installed on the mounting seat 200 and is located on the side of the first conductive member 301 away from the third conductive member 303. When the power-off protection device 100 switches from the first state to the second state, the power-off protection device 100 sequentially cuts off the first conductive member 301 and the third conductive member 303, and the electrical connection between the input end and the output end of the conductive component 300 is disconnected, thereby realizing power-off protection for the power supply and the load. The present application does not limit this.

[0050] Please refer to Figure 1 and Figure 2 Furthermore, the first conductive member 301 has a first notch 304, and the first notch 304 is disposed opposite to the power-off protection device 100, that is, the cutting position of the power-off protection device 100 on the first conductive member 301 corresponds to the first notch 304. The third conductive member 303 has a second notch 305, and the second notch 305 is disposed opposite to the power-off protection device 100, that is, the cutting position of the power-off protection device 100 on the third conductive member 303 corresponds to the second notch 305. Through the settings of the first notch 304 and the second notch 305, it is beneficial to reduce the difficulty of the power-off protection device 100 in cutting off the first conductive member 301 and the third conductive member 303, and further improve the power-off protection effect of the power-off protection device 100 on the control circuit 1000.

[0051] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 3 which is a structural diagram of a power-off protection device provided by the first embodiment of the present application, Figure 4 is Figure 3 a cross-sectional view of the power-off protection device shown in

[0052] The first embodiment of the present application provides a power-off protection device 100. The power-off protection device 100 is used to cut off the electrical connection between the input end and the output end of the conductive component 300. The power-off protection device 100 includes a housing component 10, an actuating component 20, and an excitation component 30. The housing component 10 has a hollow cavity 11. The actuating component 20 is movably received in the hollow cavity 11, and the actuating component 20 can extend from the inside of the hollow cavity 11 to the outside of the hollow cavity 11. At least part of the excitation component 30 is received in the hollow cavity 11. The excitation component 30 is used to drive the actuating component 20 to act, and make the actuating component 20 extend out of the hollow cavity 11, so as to make the actuating component 20 cut off the electrical connection between the input end and the output end of the conductive component 300.

[0053] For the power-off protection device 100 provided by the first embodiment of the present application, the excitation component 30 in the housing component 10 drives the actuating component 20 to act, so that the actuating component 20 cuts off the electrical connection between the input end and the output end of the conductive component 300, and then makes the circuit formed by the conductive component 300 powered off, which can reduce the occurrence of circuit out-of-control and electrical control fire, and thus is beneficial to improving the circuit safety performance.

[0054] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ,In one embodiment, the actuating component 20 includes a first actuating member 21 and a second actuating member 22. The excitation component 30 is disposed between the first actuating member 21 and the second actuating member 22. The first actuating member 21 and the second actuating member 22 are used to cut off the input end and the output end of at least two conductive components 300 under the action of the excitation component 30, that is, the first actuating member 21 cuts off the first conductive member 301, and the second actuating member 22 cuts off the third conductive member 303.

[0055] For the power-off protection device 100 provided by the first embodiment of the present application, the first actuating member 21 and the second actuating member 22 respectively cut off the electrical connection between the input end and the output end of the first conductive member 301 and the electrical connection between the input end and the output end of the third conductive member 303 under the drive of the excitation component 30, so that two phases of the three-phase electricity of the conductive component 300 are cut off, and then the three-phase circuit formed by the conductive component 300 is powered off, which can reduce the occurrence of circuit out-of-control and electrical control fire, and thus is beneficial to improving the circuit safety performance.

[0056] It can be understood that in some other embodiments, the number of the moving parts 20 is only one. By activating the activating part 30 to drive one moving part 20, two conductive parts 300 can be cut off in sequence, or the three-phase circuit formed by the conductive parts 300 can be powered off. The present application does not limit this.

[0057] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , in an embodiment, the hollow cavity 11 has a first opening 111 and a second opening 112 that are oppositely arranged along the first direction of the housing part 10. The first moving part 21 is received in the hollow cavity 11, and the second moving part 22 is received in the hollow cavity 11. The first moving part 21 and the second moving part 22 are arranged at intervals. The activating part 30 is arranged between the first moving part 21 and the second moving part 22. The activating part 30 is used to drive at least a part of the first moving part 21 to extend out of the first opening 111, and the activating part 30 is also used to drive at least a part of the second moving part 22 to extend out of the second opening 112. Wherein, the first direction is the X-axis direction as shown in Figure 4 . Taking the hollow cavity 11 as a tubular cavity as an example, the first direction is the axial direction of the tubular hollow cavity 11.

[0058] For the power-off protection device 100 provided in the first embodiment of the present application, the activating part 30 drives the first moving part 21 and the second moving part 22 to extend out of the first opening 111 and the second opening 112 respectively, so as to facilitate the first moving part 21 and the second moving part 22 to cut off the first conductive part 301 and the third conductive part 303 of the conductive part 300 respectively, and further enable the power-off protection device 100 to cut off the input end and the output end of the three-phase circuit formed by the conductive part 300.

[0059] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , in an embodiment, the activating part 30 includes an explosive part 31 and a detonating part 32. The detonating part 32 is used to detonate the explosive part 31. The explosive part 31 is located between the first moving part 21 and the second moving part 22. The explosive part 31 is used to generate an air flow for driving the first moving part 21 and driving the second moving part 22.

[0060] The power-off protection device 100 provided by the first embodiment of the present application detonates the explosive member 31 through the detonating member 32, so that the airflow generated by the explosive member 31 pushes the first moving member 21 and the second moving member 22 to move away from each other. The first moving member 21 extends out of the first opening 111 to cut off the first conductive member 301, and the second moving member 22 extends out of the second opening 112 to cut off the third conductive member 303, so that the power-off protection device 100 can cut off the input end and the output end of the three phases formed by the conductive component 300.

[0061] Exemplarily, the air pressure of the airflow generated by the instantaneous explosion of the explosive member 31 is 2 to 8 MPa, so that the first moving member 21 extends out of the first opening 111 to cut off the first conductive member 301, and the second moving member 22 extends out of the second opening 112 to cut off the third conductive member 303.

[0062] It can be understood that in some other embodiments, the excitation component 30 can be a mechanical drive component, and the first moving member 21 and the second moving member 22 are driven to move away from each other through the mechanical drive component, so that the power-off protection device 100 can cut off the input end and the output end of the three phases formed by the conductive component 300. The present application does not limit this.

[0063] Please refer to Figure 3 and Figure 4 In one embodiment, the excitation component 30 further includes a fixing seat 33. The fixing seat 33 is disposed in the hollow cavity 11, and the fixing seat 33 is used to fix the explosive member 31 to prevent the explosive member 31 from moving in the hollow cavity 11.

[0064] The power-off protection device 100 provided by the first embodiment of the present application, through the setting of the fixing seat 33, enables the explosive member 31 to be fixedly disposed in the hollow cavity 11. On the one hand, the stability between the explosive member 31 and the detonating member 32 can be improved, thereby improving the explosion reliability of the explosive member 31. On the other hand, the explosive member 31 can be prevented from moving in the hollow cavity 11 to be close to the first moving member 21 or the second moving member 22, so that the airflow generated by the explosion of the explosive member 31 can act on the first moving member 21 and the second moving member 22 evenly, which is beneficial to improving the action consistency of the first moving member 21 and the second moving member 22, and further improving the timeliness of the cutting-off of the first conductive member 301 and the third conductive member 303.

[0065] Please refer to Figure 3 and Figure 4, in one embodiment, the power-off protection device 100 further includes a flow splitting member 40. The flow splitting member 40 is received in the hollow cavity 11 and is located between the first actuating member 21 and the second actuating member 22. The flow splitting member 40 and the fixed seat 33 are opposite and spaced apart along the second direction of the housing member 10. The flow splitting member 40 is used to split the airflow generated after the explosion of the explosive member 31, so that the airflow generated by the explosion of the explosive member 31 acts uniformly on the first actuating member 21 and the second actuating member 22. Wherein, the second direction is perpendicular to the second direction, and the second direction is the Z-axis direction as shown in Figure 4 . Taking the hollow cavity 11 as a tubular cavity as an example, the second direction is the radial direction of the tubular hollow cavity 11.

[0066] For the power-off protection device 100 provided in the first embodiment of the present application, through the arrangement of the flow splitting member 40, the airflow at the moment of explosion generated by the explosion of the explosive member 31 acts uniformly on the first actuating member 21 and the second actuating member 22, so that the moving speeds and strokes of the first actuating member 21 and the second actuating member 22 are consistent, which is beneficial to improving the action consistency of the first actuating member 21 and the second actuating member 22, and further improving the timeliness of the disconnection of the first conductive member 301 and the third conductive member 303.

[0067] Please refer to Figure 3 and Figure 4 , in a specific embodiment, the flow splitting member 40 includes a first flow splitting surface 41 and a second flow splitting surface 42. The first flow splitting surface 41 and the second flow splitting surface 42 are symmetrically arranged along the second direction of the housing member 10.

[0068] For the power-off protection device 100 provided in the first embodiment of the present application, through the symmetrical arrangement of the first flow splitting surface 41 and the second flow splitting surface 42 along the second direction of the housing member 10, the airflow at the moment of explosion generated by the explosion of the explosive member 31 acts uniformly on the first actuating member 21 and the second actuating member 22, so that the moving speeds and strokes of the first actuating member 21 and the second actuating member 22 are consistent, which is beneficial to improving the action consistency of the first actuating member 21 and the second actuating member 22, and further improving the timeliness of the disconnection of the first conductive member 301 and the third conductive member 303.

[0069] In this embodiment, the first flow splitting surface 41 and the second flow splitting surface 42 are planes. It can be understood that in some other embodiments, both the first flow splitting surface 41 and the second flow splitting surface are curved surfaces, and the present application does not limit this.

[0070] Please refer to Figure 3 and Figure 4, in one embodiment, the moving member 20 further includes a first sealing portion 23 disposed between the first moving member 21 and the inner wall of the hollow cavity 11. The first sealing portion 23 is configured to seal the first moving member 21 and the inner wall of the hollow cavity 11 when the first moving member 21 moves within the hollow cavity 11. The power-off protection device 100 further includes a second sealing portion 24 disposed between the second moving member 22 and the inner wall of the hollow cavity 11. The second sealing portion 24 is configured to seal the second moving member 22 and the inner wall of the hollow cavity 11 when the second moving member 22 moves within the hollow cavity 11.

[0071] In the power-off protection device 100 provided in the first embodiment of the present application, through the arrangement of the first sealing portion 23 and the second sealing portion 24, the airflow generated by the explosion of the explosive member 31 will not overflow between the first moving member 21 and the inner wall of the hollow cavity 11, nor will it overflow between the second moving member 22 and the inner wall of the hollow cavity 11, so that the airflow generated by the explosion of the explosive member 31 fully acts on the first moving member 21 and the second moving member 22, thereby ensuring the driving effect of the airflow generated by the explosion of the explosive member 31 on the first moving member 21 and the second moving member 22, which is beneficial to improving the driving effect and driving stability of the airflow generated by the explosion of the explosive member 31 on the first moving member 21 and the second moving member 22.

[0072] It can be understood that in some other embodiments, the power-off protection device 100 may include only the first sealing portion 23, or only the second sealing portion 24, and the present application does not limit this.

[0073] Please refer to Figure 3 and Figure 4 , in one embodiment, the first moving member 21 has a first groove 211 and a first recess 212. The opening of the first groove 211 faces the second moving member 22, and the first recess 212 is disposed on the peripheral edge of the opening of the first groove 211. The second moving member 22 has a second groove 221 and a second recess 222. The opening of the second groove 221 faces the first moving member 21, and the second recess 222 is disposed on the peripheral edge of the opening of the second groove 221.

[0074] The power-off protection device 100 provided by the first embodiment of the present application, through the settings of the first groove 211 and the second groove 221, both the first groove 211 and the second groove 221 can accommodate a part of air, and during the assembly process of the power-off protection device 100, the interference amount of the first sealing portion 23 and the second sealing portion 24 can be increased, thereby improving the airtightness between the first moving member 21 and the housing member 10, and improving the airtightness between the second moving member 22 and the housing member 10. Through the setting of the first recess 212, the acting surface of the airflow generated by the explosion of the explosive member 31 on the first moving member 21 is larger, which is beneficial to reducing the occurrence of the failure of the first moving member 21 caused by the instantaneous impact force, and thus ensuring the reliability of the operation of the power-off protection device 100. Through the setting of the second recess 222, the acting surface of the airflow generated by the explosion of the explosive member 31 on the second moving member 22 is larger, which is beneficial to reducing the occurrence of the failure of the first moving member 21 caused by the instantaneous impact force on the second moving member 22, and thus ensuring the reliability of the operation of the power-off protection device 100.

[0075] It can be understood that in some other embodiments, the power-off protection device 100 may only be provided with the first groove 211 on the first moving member 21, or only be provided with the second groove 221 on the second moving member 22, and the present application does not limit this.

[0076] It can be understood that in some other embodiments, the power-off protection device 100 may omit the setting of the first recess 212 on the first moving member 21, or only omit the setting of the second recess 222 on the second moving member 22, and the present application does not limit this.

[0077] It can be understood that in some other embodiments, the power-off protection device 100 may omit the setting of the first groove 211 on the first moving member 21 and simultaneously omit the setting of the second groove 221 on the second moving member 22, and the present application does not limit this.

[0078] It can be understood that in some other embodiments, the power-off protection device 100 may omit the setting of the first recess 212 on the first moving member 21 and simultaneously omit the setting of the second recess 222 on the second moving member 22, and the present application does not limit this.

[0079] Please refer to Figure 3 and Figure 4 , in one embodiment, the housing member 10 includes a sleeve 12 and a housing 13, a hollow cavity 11 is arranged inside the sleeve 12, and the housing 13 is sleeved outside the sleeve 12.

[0080] The power-off protection device 100 provided in the first embodiment of the present application forms a hollow cavity 11 through the sleeve 12, so that the airflow generated by the explosion of the explosive member 31 can act on the first actuating member 21 and the second actuating member 22 in a closed space, thereby pushing the first actuating member 21 and the second actuating member 22 to extend out of the first opening 111 and the second opening 112 respectively, so as to cut off the input end and the output end of the conductive component 300. The outer shell 13 is sleeved outside the sleeve 12, and the outer shell 13 can be fixedly connected to the connecting seat, so that the power-off protection device 100 is fixed on the connecting seat as a whole.

[0081] In a specific embodiment, the sleeve 12 is provided with a mounting hole 121, which is in communication with the hollow cavity 11, and the mounting hole 121 is provided so as to facilitate the installation of the explosive member 31 on the fixing seat 33 of the hollow cavity 11. At the same time, the housing 13 is provided with the mounting hole 121 so as to seal the mounting hole 121, thereby enabling the airflow generated by the explosion of the explosive member 31 to act on the first action member 21 and the second action member 22 in a closed space.

[0082] In a specific embodiment, the housing 13 has a threaded hole, and the housing 13 is fixed to the connecting seat by screws.

[0083] See also Figure 3 and Figure 4 In one embodiment, the housing component 10 further includes a first stopper 14, which is mounted on the sleeve 12 and located at the first opening 111 of the hollow cavity 11. The inner diameter of the first stopper 14 at the first opening 111 is smaller than the maximum outer diameter of the first actuating member 21. The first stopper 14 is used to limit the first actuating member 21 from falling off from the first opening 111 of the hollow cavity 11. The housing component 10 further includes a second stopper 15, which is mounted on the sleeve 12 and located at the second opening 112 of the hollow cavity 11. The inner diameter of the second stopper 15 at the first opening is smaller than the maximum outer diameter of the second actuating member 22. The second stopper 15 is used to limit the second actuating member 22 from falling off from the second opening 112 of the hollow cavity 11.

[0084] The power-off protection device 100 provided in the first embodiment of the present application can prevent the first action member 21 from escaping from the hollow cavity 11 at the first opening 111 by setting the first stopper 14. The second action member 22 can be prevented from escaping from the hollow cavity 11 at the second opening 112 by setting the second stopper 15. Thus, by setting the first stopper 14 and the second stopper 15, the power-off protection device 100 will not drive the first action member 21 and the second action member 22 to detach from the power-off protection device 100 after the explosion member 31 explodes, which is conducive to improving the working stability of the power-off protection device 100.

[0085] It can be understood that in some other embodiments, the housing component 10 only includes the first limiting member 14, or the housing component 10 only includes the second limiting member 15, and the present application does not limit this.

[0086] Furthermore, the first limiting member 14 is threadedly connected to the sleeve 12, and the second limiting member 15 is threadedly connected to the sleeve 12.

[0087] Please refer to Figure 5 and Figure 6 , Figure 5 which is a structural diagram of a power-off protection device provided by the second embodiment of the present application. Figure 6 It is Figure 5 a cross-sectional view of the power-off protection device shown.

[0088] The power-off protection device 100 provided by the second embodiment of the present application has a structure substantially the same as that of the power-off protection device 100 provided by the first embodiment of the present application. The difference is that the power-off protection device 100 provided by the second embodiment of the present application further includes an explosion-proof tube 16.

[0089] Specifically, in the power-off protection device 100 provided by the second embodiment of the present application, the housing component 10 further includes an explosion-proof tube 16. The explosion-proof tube 16 is sleeved outside the sleeve 12, and the outer shell 13 is sleeved outside the explosion-proof tube 16. Through the arrangement of the explosion-proof tube 16, the explosion-proof tube 16 is arranged between the outer wall of the sleeve 12 and the inner wall of the outer shell 13, which can reduce the impact force of the airflow generated by the explosion of the explosive member 31 on the outer shell 13, and further reduce the damage of the outer shell 13 caused by the airflow generated by the explosion of the explosive member 31. Therefore, through the arrangement of the explosion-proof tube 16, the specification of the explosive member 31 in the same closed volume can be increased, that is, the airflow pressure generated by the explosion of the explosive member 31 can be made greater, so that the power-off protection device 100 has a good cutting effect on conductive members of different specifications, and the impact resistance of the power-off protection device 100 can be ensured, which is beneficial to improving the application range of the power-off protection device 100. One end of the detonating member 32 is connected to the explosive member 31, and the other end of the detonating member 32 sequentially passes through the sleeve 12, the explosion-proof tube 16 and the outer shell 13.

[0090] Please refer to Figure 5 and Figure 6, specifically, in the power-off protection device 100 provided in the second embodiment of the present application, the housing component 10 further includes a pin 17. The housing component 10 also has a pressure relief hole 18, the pressure relief hole 18 penetrates through the explosion-proof tube 16 and the sleeve 12 and communicates with the hollow cavity 11, and the pin 17 is movably arranged in the pressure relief hole 18. Through the arrangement of the pressure relief hole 18 and the pin 17, the pin 17 is movably arranged in the pressure relief hole 18. When the explosive member 31 explodes to generate a large air flow pressure, the pin 17 moves to make the pressure relief hole 18 communicate with the outside, so that the power-off protection device 100 has the functions of emergency pressure relief and explosion protection. At the same time, through the arrangement of the pressure relief hole 18 and the pin 17, it can be avoided that the first moving member 21 and the second moving member 22 are displaced due to excessive air pressure during the assembly process of the power-off protection device 100.

[0091] Please refer to Figure 5 and Figure 6 , specifically, in the power-off protection device 100 provided in the second embodiment of the present application, a plug-in portion 131 protrudes from the outer shell 13. One end of the detonator 32 facing away from the explosive member 31 penetrates into the plug-in portion 131, and the plug-in portion 131 is used to connect the detonator 32 with an external detonation signal. Through the arrangement of the plug-in portion 131, it is convenient to connect the detonator 32 with an external signal generating device, and the signal sent by the external signal generating device is transmitted through the detonator 32 to cause the plug-in portion 131 to explode.

[0092] Please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 , specifically, in the power-off protection device 100 provided in the second embodiment of the present application, the outer shell 13 includes a first shell 132 and a second shell 133, and the first shell 132 and the second shell 133 are buckled so that the whole outer shell 13 is sleeved outside the sleeve 12 and the explosion-proof tube 16. The plug-in portion 131 is arranged on the first shell 132, and the second shell 133 is used to connect with the mounting seat 200.

[0093] Please refer to Figure 5 and Figure 6 , specifically, in the power-off protection device 100 provided in the second embodiment of the present application, the first limiting member 14 is welded to one end of the hollow cavity 11 of the sleeve 12 close to the first opening 111, and the second limiting member 15 is welded to one end of the hollow cavity 11 of the sleeve 12 close to the second opening 112.

[0094] Please refer to Figure 7 and Figure 8 , Figure 7 is a structural diagram of a power-off protection device provided in the third embodiment of the present application from a first perspective, Figure 8 is a structural diagram of a power-off protection device provided in the third embodiment of the present application from a second perspective.

[0095] The power-off protection device 100 provided in the third embodiment of the present application has substantially the same structure as the power-off protection device 100 provided in the second embodiment of the present application, except that the plug-in part 131 provided on the outer shell 13 is omitted in the power-off protection device 100 provided in the third embodiment of the present application.

[0096] Please refer to Figure 9 and Figure 10 , Figure 9 FIG. is a structural diagram of a power-off protection device provided in the fourth embodiment of the present application from a first perspective, Figure 10 FIG. is a structural diagram of a power-off protection device provided in the fourth embodiment of the present application from a second perspective.

[0097] The power-off protection device 100 provided in the fourth embodiment of the present application has substantially the same structure as the power-off protection device 100 provided in the second embodiment of the present application, except that the outer shell 13 of the power-off protection device 100 provided in the fourth embodiment of the present application is injection-molded.

[0098] The above are some embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A power-off protection device, characterized in that: Used to cut off the electrical connection between the input end and the output end of the conductive component, the power-off protection device includes: a housing member having a hollow cavity; an action component, movably received in the hollow cavity, and capable of extending out of the hollow cavity; and The exciting component is at least partially accommodated in the hollow cavity, and the exciting component is used to drive the action component to operate so that the action component cuts off the electrical connection between the input end and the output end of the conductive component.

2. The power-off protection device according to claim 1, characterized in that: The action component includes a first action piece and a second action piece; the excitation component is arranged between the first action piece and the second action piece; the first action piece and the second action piece are used to cut off the input end and the output end of at least two of the conductive components under the action of the excitation component.

3. The power-off protection device according to claim 2, characterized in that: The hollow cavity has a first opening and a second opening arranged opposite to each other along a first direction of the shell component; the first actuating member is accommodated in the hollow cavity, the second actuating member is accommodated in the hollow cavity, and the first actuating member and the second actuating member are arranged at intervals; the excitation component is used to drive at least a portion of the first actuating member to extend out of the first opening, and the excitation component is also used to drive at least a portion of the second actuating member to extend out of the second opening.

4. The power-off protection device according to claim 3, characterized in that: The excitation component includes an explosive part and a detonating part, wherein the detonating part is used to detonate the explosive part, the explosive part is located between the first actuating part and the second actuating part, and the explosive part is used to generate an airflow for driving the first actuating part and the second actuating part.

5. The power-off protection device according to claim 4, characterized in that: The excitation component also includes a fixing seat, which is arranged in the hollow cavity and is used to fix the explosive component.

6. The power-off protection device according to claim 4, characterized in that: The power-off protection device further comprises a diverter component, which is received in the hollow cavity and located between the first actuating member and the second actuating member, and is used for diverting the airflow generated after the explosive member is detonated.

7. The power-off protection device according to claim 6, characterized in that: The flow dividing component comprises a first flow dividing surface and a second flow dividing surface. The first flow dividing surface and the second flow dividing surface are symmetrically arranged along a second direction of the shell component. The second direction is perpendicular to the first direction.

8. The power-off protection device according to claim 4, characterized in that: The power-off protection device further includes a first sealing portion, which is arranged between the first actuating member and the inner wall of the hollow cavity; and / or the power-off protection device further includes a second sealing portion, which is arranged between the second actuating member and the inner wall of the hollow cavity.

9. The power-off protection device according to claim 4, characterized in that: The first action member has a first groove and a first depression, the opening of the first groove faces the second action member, and the first depression is arranged at the opening periphery of the first groove; And / or, the second action member has a second groove and a second depression, the opening of the second groove faces the first action member, and the second depression is arranged at the opening periphery of the second groove.

10. The power-off protection device according to claim 4, characterized in that: The shell component comprises a sleeve and an outer shell, the hollow cavity is arranged in the sleeve, and the outer shell is sleeved outside the sleeve.

11. The power-off protection device according to claim 10, characterized in that: The shell component also includes an explosion-proof tube, the explosion-proof tube is sleeved outside the sleeve, and the outer shell is sleeved outside the explosion-proof tube.

12. The power-off protection device according to claim 11, characterized in that: The shell component further includes a pin; the shell component further includes a pressure relief hole, the pressure relief hole penetrates the explosion-proof tube and the sleeve and is connected with the hollow cavity, and the pin is movably arranged in the pressure relief hole.

13. The power-off protection device according to claim 10, characterized in that: The shell component also includes a first limit member, which is installed on the sleeve and located at the first opening of the hollow cavity, and the first limit member is used to limit the first action member from falling off from the first opening of the hollow cavity; and / or, the shell component also includes a second limit member, which is installed on the sleeve and located at the second opening of the hollow cavity, and the second limit member is used to limit the second action member from falling off from the second opening of the hollow cavity.

14. The power-off protection device according to claim 10, characterized in that: The outer shell is provided with a plug-in portion, the detonating component is passed through the plug-in portion, and the plug-in portion is used to connect the detonating component with an external detonation signal.

15. A control circuit, characterized in that: include: The power-off protection device according to any one of claims 1 to 14; A mounting seat, the power-off protection device is mounted on the mounting seat; as well as A conductive component is mounted on the mounting seat, and the power-off protection device is used to cut off the electrical connection between the input end and the output end of the conductive component.

16. The control circuit according to claim 15, characterized in that: The conductive component includes a first conductive member, a second conductive member and a third conductive member, the first conductive member, the second conductive member and the third conductive member are all installed on the mounting seat, and the power-off protection device is used to cut off at least two of the first conductive member, the second conductive member and the third conductive member.

17. The control circuit according to claim 16, characterized in that: The power-off protection device is used to cut off the first conductive member and the third conductive member; a first notch is set on the first conductive member, and a second notch is set on the third conductive member. The power-off protection device is used to cut off the first notch position of the first conductive member and cut off the second notch position of the third conductive member.

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