Detonation-type actuator, electric motor controller, powertrain and vehicle

Abstract

A detonation-type actuator, an electric motor controller, a powertrain and a vehicle. The detonation-type actuator (100) comprises: a housing (1), which is provided with an opening (11); a piston (2), which is movably arranged in the housing (1); and a detonation device (3), which is arranged in the housing (1); when detonated, the detonation device (3) can drive part of the piston (2) to extend out of the housing (1) through the opening, and at least the piston (2) radially deforms in the direction away from the central axis of the piston (2) and is in interference connection with the housing (1).

Description

Initiation actuator, motor controller, powertrain and vehicle

[0001] Cross-reference to Related Applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 2024106427184, filed on May 22, 2024, the entire contents of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of initiation actuator, in particular to an initiation actuator, a motor controller, a powertrain and a vehicle. BACKGROUND

[0004] The initiation actuator is a product for protecting the circuit when the circuit overcurrent, which pushes the piston to cut off the load component through the shock wave generated after the explosion, to achieve the effect of disconnecting the circuit. However, the existing initiation actuator piston is easy to rebound after being launched, resulting in the situation that the load component cannot be cut off. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an initiation actuator which effectively avoids the situation that the piston moves away from the load component due to the decrease in gas pressure after the explosion of the explosion device, and the residue leaks from the gap between the piston and the shell.

[0006] The present application also provides a motor controller, which comprises the above-mentioned initiation actuator.

[0007] The present application also provides a powertrain, which comprises the above-mentioned motor controller.

[0008] The present application also provides a vehicle, which comprises the above-mentioned powertrain.

[0009] According to the initiation actuator of the present application, the initiation actuator comprises a shell having an opening, a piston movably arranged in the shell, and an explosion device arranged in the shell, which can drive a part of the piston to extend out of the shell from the opening after explosion, and at least the piston is radially deformed towards the direction away from the central axis of the piston and is connected with the shell in interference.

[0010] According to the detonation actuator, the shell has an opening, the piston is movably arranged in the shell, and the detonation device is arranged in the shell. After the detonation device is detonated, a part of the piston driven by the detonation device extends out of the shell from the opening, so that the part of the piston extends out of the shell from the opening and cuts off the load component, thereby disconnecting the power supply end and the load end connected by the load component, and further realizing the open circuit effect of the detonation actuator. At the same time, by at least deforming the piston radially towards the direction away from the central axis of the piston and being in interference connection with the shell, the movement of the piston towards the direction away from the load component caused by the pressure drop after the explosion and combustion of the detonation device is effectively avoided, the piston is guaranteed to cut off the load component, and the leakage of residues generated after the detonation of the detonation device from the gap between the piston and the shell is avoided, the downtime, maintenance and cleaning time caused by the leakage of residues are reduced, and the safety and reliability of the detonation actuator are improved.

[0011] In some embodiments of the present application, after the detonation device is detonated, one end of the piston close to the detonation device deforms radially towards the direction away from the central axis of the piston and is in interference connection with the shell, and the other end of the piston away from the detonation device extends out of the opening.

[0012] In some embodiments of the present application, the piston comprises: a first section, in the radial direction of the piston, the radial dimension of the first section is greater than the hole diameter of the opening; and a second section, one end of the second section is connected to the end of the first section away from the detonation device, in the radial direction of the piston, the radial dimension of the second section is less than the hole diameter of the opening, and at least part of the second section can extend out of the shell from the opening after the detonation device is detonated.

[0013] In some embodiments of the present application, the end face of the first section towards the detonation device is provided with a recess, and the open mouth of the recess faces the detonation device.

[0014] In some embodiments of the present application, after the detonation device is detonated, the radial deformation of the piston towards the direction away from the central axis of the recess gradually increases in the direction from the bottom wall of the recess to the open mouth of the recess.

[0015] In some embodiments of the present application, the cross-sectional area of the first section gradually increases in the direction from the bottom wall of the recess to the open mouth of the recess.

[0016] In some embodiments of the present application, in the moving direction of the piston, the size of the first section is a, and the size of the recess is b, wherein b=a / 10.

[0017] In some embodiments of the present application, the bottom wall of the recess is further provided with a groove.

[0018] In some embodiments of the present application, the size of the first section is a, and the size of the groove is c in the moving direction of the piston (2), wherein c = 6a / 10-7a / 10.

[0019] In some embodiments of the present application, the size of the first section is d, and the size of the groove is e in the radial direction of the first section (21), wherein e = d / 5-d / 6.

[0020] In some embodiments of the present application, the peripheral wall of the piston has a sealing groove extending in the circumferential direction of the piston, and the detonating actuator further comprises a sealing ring located in the sealing groove and sealingly connected with the shell.

[0021] In some embodiments of the present application, the sealing groove is oppositely arranged with at least part of the groove.

[0022] In some embodiments of the present application, the cross-sectional area of the second section remains unchanged in the direction of the central axis of the piston; or, the piston comprises a first sub-section and a second sub-section in the direction of the central axis of the piston, the first sub-section is located at one end of the second sub-section away from the first section, and the cross-sectional area of the first sub-section gradually decreases in the direction of the central axis of the piston from the detonating device to the first section, and the cross-sectional area of the second sub-section remains unchanged in the direction of the central axis of the piston.

[0023] In some embodiments of the present application, part of the outer wall of the piston and the inner wall of the shell are fitted.

[0024] In some embodiments of the present application, the detonating device comprises a base located in the shell and connected with the shell, the base has a detonating cavity with an exhaust port oppositely arranged with the piston; a powder box located in the detonating cavity; a fuse connected with the powder box at one end and extending out of the shell through the base at the other end.

[0025] In some embodiments of the present application, the piston is spaced apart and comprises a first piston and a second piston, the exhaust port is multiple and comprises a first exhaust port and a second exhaust port, the first piston is oppositely arranged with the first exhaust port, the second piston is oppositely arranged with the second exhaust port, and the opening is multiple corresponding to the multiple pistons.

[0026] In some embodiments of the present application, the multiple pistons further comprise a third piston, and the multiple exhaust ports further comprise a third exhaust port, the third piston is oppositely arranged with the third exhaust port.

[0027] In some embodiments of the present application, the fixed component is wrapped around the outer wall of the shell and the detonating device.

[0028] In some embodiments of the present application, after the detonating device is detonated, the shell cooperating with the piston is deformed radially towards the direction away from the central axis of the piston, and the amount of radial deformation of the shell cooperating with the piston towards the direction away from the central axis of the piston is less than the amount of radial deformation of the piston towards the direction away from the central axis of the piston.

[0029] In some embodiments of the present application, the piston is an elastically deformable member.

[0030] According to the motor controller of the embodiments of the present application, the three-phase copper bars are provided, and the above-mentioned detonating actuator is used to cut off at least two of the three-phase copper bars.

[0031] According to the motor controller of the embodiments of the present application, the detonating actuator is provided, which is used to cut off at least two of the three-phase copper bars, so as to cut off the loop between the battery and the motor, realize the disconnection of three-phase alternating current between the motor controller and the motor, and further realize the open circuit effect of the motor controller. At the same time, by at least the piston being deformed radially towards the direction away from the central axis of the piston and being connected with the shell in interference, the movement of the piston towards the direction away from the three-phase copper bars caused by the decrease of gas pressure after the detonating device explodes and burns is effectively avoided, the cutting off of the three-phase copper bars by the piston is ensured, and the leakage of residues generated after the detonating device is detonated from the gap between the piston and the shell is avoided, the downtime, maintenance and cleaning time caused by residue leakage are reduced, and the safety and reliability of the motor controller are improved.

[0032] According to the power assembly of the embodiments of the present application, the above-mentioned motor controller is provided.

[0033] According to the power assembly of the embodiments of the present application, the motor controller is provided, and the detonating actuator is used to cut off at least two of the three-phase copper bars, so as to cut off the loop between the battery and the motor, realize the disconnection of three-phase alternating current between the motor controller and the motor, and further realize the open circuit effect of the motor controller, thereby improving the reliability and safety of the power assembly.

[0034] According to the vehicle of the embodiments of the present application, the above-mentioned power assembly is provided.

[0035] According to the vehicle of the embodiments of the present application, the power assembly is provided, and the detonating actuator is used to cut off at least two of the three-phase copper bars, so as to cut off the loop between the battery and the motor, realize the disconnection of three-phase alternating current between the motor controller and the motor, and further realize the open circuit effect of the motor controller, thereby improving the reliability and safety of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 is a structural schematic diagram of an explosive actuator according to an embodiment of the present application, wherein the explosive device is not exploded;

[0037] Fig. 2 is a structural schematic diagram of an explosive actuator according to an embodiment of the present application, wherein the explosive device is exploded;

[0038] Fig. 3 is a comparative structural schematic diagram of a piston of an explosive actuator according to an embodiment of the present application before and after the explosive device is exploded;

[0039] Fig. 4 is a structural schematic diagram of an explosive actuator according to another embodiment of the present application, wherein the explosive device is not exploded;

[0040] Fig. 5 is a comparative structural schematic diagram of a piston of an explosive actuator according to another embodiment of the present application before and after the explosive device is exploded;

[0041] Fig. 6 is a structural schematic diagram of an explosive actuator according to still another embodiment of the present application, wherein the explosive device is not exploded;

[0042] Fig. 7 is a front view of a piston according to yet another embodiment of the present application;

[0043] Fig. 8 is a side view of Fig. 7;

[0044] Fig. 9 is a schematic diagram of a piston of an explosive actuator and a belt load component according to an embodiment of the present application, wherein the belt load component is a cross-sectional schematic diagram along the thickness direction of the belt load component;

[0045] Fig. 10 is a schematic diagram of a piston of an explosive actuator and a belt load component according to an embodiment of the present application, wherein the belt load component is a cross-sectional schematic diagram along the length direction of the belt load component;

[0046] Fig. 11 is a structural schematic diagram of a vehicle according to an embodiment of the present application.

[0047] Reference signs: W, vehicle; Y, power assembly; Z, motor controller; 100, explosive actuator; 1, housing; 11, opening; 2, piston; 21, first section; 211, recess; 2111, open opening; 212, groove; 213, sealing groove; 22, second section; 221, first sub-section; 222, second sub-section; 23, first piston; 24, second piston; 25, third piston; 3, explosive device; 31, base; 311, explosive cavity; 312, exhaust port; 3121, first exhaust port; 3122, second exhaust port; 3123, third exhaust port; 32, cartridge; 33, fuse; 4, sealing ring; 5, fixed component; 200, belt load component; 6, weak portion. DETAILED DESCRIPTION

[0048] Embodiments of the present application are described below in detail with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application.

[0049] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, features defined with "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0050] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] The detonation actuator 100 according to the embodiments of the present application is described below with reference to the accompanying drawings.

[0052] As shown in FIGS. 1-3, the detonation actuator 100 according to the embodiments of the present application comprises a housing 1, a piston 2 and a detonation device 3.

[0053] Among them, the housing 1 has an opening 11, the piston 2 is movably arranged in the housing 1, the detonation device 3 is arranged in the housing 1, after the detonation of the detonation device 3, the part of the piston 2 driven by the detonation device 3 can extend out of the housing 1 from the opening 11, and at least the piston 2 is deformed radially away from the central axis direction of the piston 2 and is connected with the housing 1 in interference.

[0054] It can be understood that when the detonating device 3 is detonated, the explosive material inside the detonating device 3 will burn or explode rapidly, releasing a large amount of energy, which rapidly spreads in the form of a shock wave in the shell 1. The piston 2 is rapidly moved towards the direction of the load-carrying component 200 under the action of the shock wave, so that part of the piston 2 extends out of the shell 1 from the opening 11 and cuts off the load-carrying component 200, thereby disconnecting the power supply end and the load end connected by the load-carrying component 200, and further realizing the open circuit effect of the detonation actuator 100.

[0055] At the same time, the opening 11 is provided to ensure that part of the piston 2 can extend out of the shell 1 from the opening 11, and to ensure that the piston 2 cuts off the load-carrying component 200. In addition, compared with the prior art actuator and the load-carrying component being a unitary piece, the detonation actuator 100 of the present application is a separate mechanism from the load-carrying component 200, which facilitates the layout of the detonation actuator 100 and improves the space utilization of the equipment using the detonation actuator 100, thereby reducing the volume.

[0056] It should be noted that the piston 2 is a non-conductor. Therefore, by such a configuration, the piston 2 will not be electrically connected to the load-carrying component 200, thereby avoiding possible short circuit or current leakage problems, and the piston 2 will not be affected by current corrosion or electrothermal aging, thereby improving the service life.

[0057] After the detonating device 3 is detonated, at least the piston 2 is deformed radially towards the direction away from the central axis of the piston 2 and is in interference connection with the shell 1, thereby increasing the contact friction between the piston 2 and the shell 1, effectively avoiding the piston 2 from moving towards the direction away from the load-carrying component 200 due to the rebound caused by the decrease in air pressure after the detonating device 3 explodes and burns, thereby ensuring that the piston 2 cuts off the load-carrying component 200 and improving the reliability of the detonation actuator. At the same time, since the piston 2 will generate a reverse force when it hits the load-carrying component 200 to be cut off, by at least the piston 2 being deformed radially towards the direction away from the central axis of the piston 2 and being in interference connection with the shell 1, the piston 2 is further ensured to cut off the load-carrying component 200, thereby ensuring the open circuit effect of the detonation actuator 100.

[0058] In addition, by at least the piston 2 being deformed radially towards the direction away from the central axis of the piston 2 and being in interference connection with the shell 1, leakage of residues generated after the detonating device 3 is detonated from the gap between the piston 2 and the shell 1 is avoided, the re-combustion or explosion of unburned combustible substances in the detonating device 3 outside the shell 1 is avoided, safety is improved, and the subsequent cleaning step of the residues is reduced, the downtime, maintenance and cleaning time caused by the leakage of the residues are reduced, which helps to reduce production costs and improve overall operating efficiency. Compared with the prior art which provides a component for collecting residues, the detonation actuator 100 of the present application does not need to be provided with other structures or components, has a simple structure, reduces costs, and improves assembly efficiency.

[0059] It should be noted that "the direction of the piston 2 away from the central axis of the piston 2" can be understood as the direction radially outward along the central axis of the piston 2.

[0060] In the embodiments of the present application, as shown in FIGS. 9 and 10, the end of the piston 2 away from the detonator 3 is opposite to the weak part 6 of the load-bearing component 200, and the weak part 6 is configured to break when impacted. Thus, after the detonator 3 is detonated, the end of the piston 2 away from the detonator 3 is further ensured to cut the weak part 6 by such a configuration, ensuring the open circuit effect of the detonation actuator 100. For example, the load-bearing component 200 is recessed to form the weak part 6 in the direction of the end of the piston 2 away from the detonator 3.

[0061] It should be noted that the shape of the shell 1 of the present application can be a cylindrical body, a cubic cylinder or a multi-prism structure, and the shape of the piston 2 is the same as that of the shell 1. When the shape of the piston 2 is a cubic cylinder or a multi-prism shape, the radial direction of the piston 2 refers to the radial direction of a circle with the center of the cross section perpendicular to the central axis of the piston 2 as the center.

[0062] In some embodiments, the load-bearing component 200 is used to connect the motor and the motor controller Z. When the detonator 3 is not detonated, the conductive sheet is not broken, so that the load-bearing component 200 is normally powered on, ensuring the circuit communication between the motor controller Z and the motor, and thus the motor can work normally. When the current is abnormal and the detonator 3 is detonated, the load-bearing component 200 will be impacted by the piston 2 to break, so that the load-bearing component 200 is open-circuited, thereby cutting off the circuit between the motor and the motor controller Z, avoiding damage to the motor and the motor controller Z by abnormal current, and improving the overall safety.

[0063] According to the detonation actuator 100 of the embodiments of the present application, the shell 1 has an opening 11, the piston 2 is movably arranged in the shell 1, and the detonator 3 is arranged in the shell 1. After the detonator 3 is detonated, the part of the piston 2 driven by the detonator 3 extends out of the shell 1 from the opening 11, so that the part of the piston 2 extends out of the shell 1 from the opening 11 and cuts the load-bearing component 200, thereby disconnecting the power supply end and the load end connected by the load-bearing component 200, and thus realizing the open circuit effect of the detonation actuator 100. At the same time, by at least the piston 2 radially deforming toward the direction away from the central axis of the piston 2 and being interference-fitted with the shell 1, it is effectively avoided that the piston 2 moves toward the direction away from the load-bearing component 200 due to the decrease of the gas pressure after the detonator 3 explodes and burns, the piston 2 is ensured to cut the load-bearing component 200, and the residue generated after the detonator 3 is detonated is avoided to leak from the gap between the piston 2 and the shell 1, the downtime, maintenance and cleaning time caused by residue leakage are reduced, and the safety and reliability of the detonation actuator 100 are improved.

[0064] In some embodiments of the present application, as shown in FIGS. 1-3, after the detonating device 3 is detonated, the end of the piston 2 close to the detonating device 3 is deformed radially towards the direction away from the central axis of the piston 2 and is interference connected with the shell 1, and the end of the piston 2 away from the detonating device 3 extends out of the opening 11.

[0065] Therefore, after the detonating device 3 is detonated, the end of the piston 2 close to the detonating device 3 is quickly moved towards the direction of the load-bearing component 200 under the action of the shock wave, and the end of the piston 2 away from the detonating device 3 extends out of the opening 11, thereby disconnecting the power supply end and the load end connected by the load-bearing component 200, and further realizing the open circuit effect of the detonation actuator 100. At the same time, by deforming the end of the piston 2 close to the detonating device 3 radially towards the direction away from the central axis of the piston 2 and interference connecting it with the shell 1, the movement of the piston 2 towards the direction away from the load-bearing component 200 caused by the pressure drop after the explosion and combustion of the detonating device 3 is effectively avoided, and the cutting of the load-bearing component 200 by the piston 2 is ensured.

[0066] In some embodiments of the present application, as shown in FIGS. 1-5, the piston 2 includes a first section 21 and a second section 22. Wherein, in the radial direction of the piston 2, the radial dimension of the first section 21 is greater than the hole diameter of the opening 11, one end of the second section 22 is connected with the end of the first section 21 away from the detonating device 3, and in the radial direction of the piston 2, the radial dimension of the second section 22 is less than the hole diameter of the opening 11, and at least part of the second section 22 can extend out of the shell 1 from the opening 11 after the detonating device 3 is detonated. Therefore, by such arrangement, the first section 21 is prevented from extending out of the shell 1 from the opening 11, thereby limiting the displacement of the piston 2, and at the same time, by the radial dimension of the second section 22 being less than the hole diameter of the opening 11, the end of the second section 22 away from the first section 21 can extend out of the shell 1 from the opening 11 and cut the load-bearing component 200 after the detonating device 3 is detonated, thereby improving the reliability of the detonation actuator 100.

[0067] In some embodiments of the present application, as shown in FIGS. 1-3, the end face of the first section 21 towards the detonating device 3 is provided with a recess 211, and the open mouth 2111 of the recess 211 is towards the detonating device 3. It can be understood that when the detonating device 3 is detonated, a huge amount of energy is released in the form of a shock wave which rapidly spreads in the shell 1, and by providing the end face of the piston 2 towards the detonating device 3 with the recess 211 and the open mouth 2111 of the recess 211 towards the detonating device 3, the shock wave enters the recess 211 and directly acts on the inner surface of the first section 21, thereby realizing the radial deformation of at least the first section 21 towards the direction away from the central axis of the piston 2 and the interference connection with the shell 1.

[0068] In some embodiments of the present application, as shown in FIGS. 1-3, the first section 21 gradually increases in radial deformation away from the central axis of the recess 211 after the detonation device 3 is detonated. Thus, by such a design, the interference between the first section 21 and the shell 1 gradually increases from the bottom wall of the recess 211 to the open end 2111 of the recess 211, and the interference between the end surface of the first section 21 and the shell 1 is the largest. By such a design, further leakage of residues from the gap between the first section 21 and the shell 1 after the detonation device 3 is detonated is avoided, further reducing downtime, maintenance and cleaning time caused by residue leakage, and improving the safety of the detonation actuator 100.

[0069] In some embodiments of the present application, as shown in FIGS. 1-3, the cross-sectional area of the recess 211 gradually increases from the bottom wall of the recess 211 to the open end 2111 of the recess 211. It can be understood that after the detonation device 3 is detonated, the shock wave enters the recess 211 from the open end 2111 of the recess 211 and propagates towards the bottom wall of the recess 211. Thus, by gradually increasing the cross-sectional area of the recess 211 from the bottom wall of the recess 211 to the open end 2111 of the recess 211, the energy of the shock wave is guided and concentrated, so that the energy of the shock wave entering the recess 211 is gradually concentrated and enhanced, further ensuring that the piston 2 deforms radially away from the central axis of the piston 2 and is interference connected with the shell 1, and improving the reliability of the detonation actuator.

[0070] In some embodiments of the present application, as shown in FIG. 6, the size of the first section 21 is a, and the size of the recess 211 is b along the moving direction of the piston 2, wherein b=a / 10. Thus, by such size limitation, the structural strength of the first section 21 is ensured while ensuring that the shock wave can enter the recess 211 from the open end of the recess 211, so as to prevent the first section 21 from being damaged due to insufficient strength, and further improve the reliability of the detonation actuator 100.

[0071] In some embodiments of the present application, as shown in FIGS. 4 and 5, the bottom wall of the recess 211 is further provided with a groove 212. Thus, after the detonation device 3 is detonated, the shock wave enters the recess 211 from the open end 2111 of the recess 211 and propagates towards the groove 212, further guiding and concentrating the energy of the shock wave entering the recess 211 and the groove 212, further increasing the size of the piston 2 deforming radially along the central axis of the piston 2, thereby increasing the interference between the piston 2 and the shell 1, and further improving the reliability of the detonation actuator.

[0072] In some embodiments of the present application, as shown in FIG. 6, along the moving direction of the piston 2, the size of the first section 21 is a, and the size of the groove 212 is c, wherein c = 6a / 10-7a / 10. It can be understood that if the size of the groove 212 is too long along the moving direction of the piston 2, the structural strength of the first section 21 will be affected, and if the size of the groove 212 is too short, the deformation degree of the first section 21 after forced expansion will not be enough, and the effect of preventing the piston from rebounding cannot be achieved. Therefore, by setting the size of the first section 21 as a and the size of the groove 212 as c, and c = 6a / 10-7a / 10, the deformation degree of the first section 21 after forced expansion is ensured, and at the same time, the first section 21 is prevented from being damaged due to insufficient strength, further improving the reliability of the detonation actuator 100.

[0073] In some embodiments of the present application, as shown in FIG. 6, along the radial direction of the first section 21, the size of the first section 21 is d, and the size of the groove 212 is e, wherein e = d / 5-d / 6. It can be understood that if the size of the groove 212 is too long along the radial direction of the first section 21, the structural strength of the first section 21 will be affected, and if the size of the groove 212 is too short, the deformation degree of the first section 21 after forced expansion will not be enough, and the effect of preventing the piston from rebounding cannot be achieved. Therefore, by setting the size of the first section 21 as d and the size of the groove 212 as e, and e = d / 5-d / 6, the deformation degree of the first section 21 after forced expansion is ensured, and at the same time, the first section 21 is prevented from being damaged due to insufficient strength, further improving the reliability of the detonation actuator 100.

[0074] In some embodiments, as shown in FIG. 4 and FIG. 5, before the detonation device 3 is detonated, the cross-sectional area of the groove 212 is constant from the bottom wall of the groove 212 to the bottom wall of the recess 211, and after the detonation device 3 is detonated, the cross-sectional area of the groove 212 gradually increases from the bottom wall of the groove 212 to the bottom wall of the recess 211. Or, before the detonation device 3 is detonated, the cross-sectional area of the groove 212 gradually increases from the bottom wall of the groove 212 to the bottom wall of the recess 211, and after the detonation device 3 is detonated, the cross-sectional area of the groove 212 gradually increases from the bottom wall of the groove 212 to the bottom wall of the recess 211 and is greater than the cross-sectional area before the detonation device 3 is detonated. Therefore, various forms of the groove 212 are achieved to meet different needs of the detonation actuator 100 and improve the versatility.

[0075] In some embodiments of the present application, as shown in FIGS. 1-5, the peripheral wall of the piston 2 has a sealing groove 213 extending in the circumferential direction of the piston 2, and the detonation actuator 100 further comprises a sealing ring 4. The sealing ring 4 is located in the sealing groove 213 and sealingly connected with the shell 1. Thus, after the detonation of the detonation device 3, the shock wave generated by the detonation device 3 is effectively prevented from leaking from the gap between the piston 2 and the shell 1 by the sealing effect of the sealing ring 4, ensuring that the piston 2 cuts off the load-bearing part 200 under the action of the shock wave and ensuring the power-off effect of the detonation actuator 100. For example, the material of the sealing ring 4 is a material composed of rubber and synthetic resin.

[0076] In some embodiments of the present application, the sealing groove 213 is oppositely arranged with at least part of the groove 212. Thus, after the detonation of the detonation device 3, the shock wave enters the recess 211 from the open end 2111 of the recess 211 and propagates towards the groove 212, and the shock wave in the recess 211 and the groove 212 causes the piston 2 to radially deform towards the direction away from the central axis of the piston 2 and be interference connected with the shell 1. By oppositely arranging the sealing groove 213 with at least part of the groove 212, the sealing effect in the sealing ring 4 is further enhanced, the leakage of the shock wave or residue is further avoided, and the reliability is improved.

[0077] In some embodiments, as shown in FIGS. 4 and 5, the end surface of the piston 2 facing the detonation device 3 is provided with a recess 211, the open end 2111 of the recess 211 faces the detonation device 3, and the bottom wall of the recess 211 is further provided with a groove 212, at least part of the groove 212 is oppositely arranged with the sealing ring 4. Thus, after the detonation of the detonation device 3, the shock wave enters the recess 211 from the open end 2111 of the recess 211 and propagates towards the groove 212, and the shock wave in the recess 211 and the groove 212 causes the piston 2 to radially deform towards the direction away from the central axis of the piston 2 and be interference connected with the shell 1. By oppositely arranging at least part of the groove 212 with the sealing ring 4, the sealing effect in the sealing ring 4 is further enhanced, the leakage of the shock wave or residue is further avoided, and the reliability is improved.

[0078] In some embodiments of the present application, as shown in FIGS. 1-5, 7 and 8, the cross-sectional area of the second section 22 remains unchanged in the direction of the central axis of the piston 2. It can be understood that, as shown in FIGS. 1-5, after the detonation device 3 is detonated, the end of the second section 22 away from the first section 21 cuts off the load-carrying component 200. Or, as shown in FIGS. 7 and 8, in the direction of the central axis of the piston 2, the piston 2 includes a first subsection 221 and a second subsection 222, the first subsection 221 is located at the end of the second subsection 222 away from the first section 21, and the cross-sectional area of the first subsection 221 in the direction of the central axis of the piston 2 gradually decreases in the direction from the detonation device 3 to the first section 21, and the cross-sectional area of the second subsection 222 in the direction of the central axis of the piston 2 remains unchanged. It can be understood that, after the detonation device 3 is detonated, the load-carrying component 200 is cut off at the position where the cross-sectional area of the first subsection 221 is the smallest.

[0079] Therefore, by such a configuration, the structure of the piston 2 that cuts off the load-carrying component 200 in different ways is provided, so that the second section 22 can be selectively adjusted according to the shape of the load-carrying component 200, or selectively adjusted according to various ways of cutting off the load-carrying component 200 from the front, side, etc., further improving the reliability and versatility of the detonation actuator 100.

[0080] In some embodiments of the present application, the outer wall surface of part of the piston 2 and the inner wall surface of the shell 1 are fitted. Therefore, by such a configuration, it is further ensured that the piston 2 can be connected with the shell 1 in interference after the radial deformation of the piston 2 towards the direction away from the central axis of the piston 2, improving the reliability.

[0081] In some embodiments of the present application, as shown in FIGS. 1, 2, 4 and 6, the detonation device 3 includes a base 31, a powder cartridge 32 and a fuse 33. Among them, the base 31 is located in the shell 1 and connected with the shell 1, the base 31 has a detonation cavity 311, the detonation cavity 311 has an exhaust port 312, the exhaust port 312 is oppositely arranged with the piston 2, the powder cartridge 32 is located in the detonation cavity 311, and one end of the fuse 33 is connected with the powder cartridge 32 and the other end extends out of the shell 1 through the base 31.

[0082] It can be understood that, when the detonation actuator 100 needs to cut off the load-carrying component 200, an external control or triggering device acts on the fuse 33, so that the fuse 33 is activated and ignites the gunpowder in the powder cartridge 32 to release a huge amount of energy, which spreads in the direction of the exhaust port 312 through the detonation cavity 311 on the base 31 in the form of a shock wave, and is oppositely arranged with the piston 2 through the exhaust port 312, so that the piston 2 is quickly moved towards the direction of the load-carrying component 200 under the action of the shock wave and cuts off the load-carrying component 200, realizing the open circuit effect of the detonation actuator 100.

[0083] Meanwhile, the fixing of the cartridge 32 and the fuse 33 is realized through the base 31, which ensures that the cartridge 32 and the fuse 33 will not be mis-fired or disabled due to vibration, impact or other external forces during transportation or storage, thereby improving the reliability and safety of the detonation actuator 100.

[0084] In some embodiments of the present application, as shown in FIGS. 1, 2 and 4, the plurality of pistons 2 includes a first piston 23 and a second piston 24, and the plurality of exhaust ports 312 includes a first exhaust port 3121 and a second exhaust port 3122, the first piston 23 is arranged opposite to the first exhaust port 3121, and the second piston 24 is arranged opposite to the second exhaust port 3122, and the plurality of openings 11 corresponds to the plurality of pistons 2 one-to-one.

[0085] Therefore, after the detonation of the detonation device 3, the shock wave spreads in the direction of the first exhaust port 3121 and the second exhaust port 3122 through the detonation cavity 311 on the base 31, so that the first piston 23 and the second piston 24 extend out of the corresponding openings 11 from the end away from the cartridge 32 to cut off the corresponding load-carrying components 200, thereby realizing the bidirectional synchronous driving output of the detonation actuator 100.

[0086] Meanwhile, the arrangement of the base 31 can ensure that the distance between the cartridge 32 and the first piston 23 and the second piston 24 is the same, and the synchronous movement of the first piston 23 and the second piston 24 is ensured, thereby further improving the reliability.

[0087] In addition, since the first piston 23 and the second piston 24 each have a corresponding exhaust port 312, the first piston 23 and the second piston 24 can work independently and do not interfere with each other, so that the movement of the first piston 23 or the second piston 24 can be controlled individually as needed, thereby realizing accurate control of different targets or different positions, improving the flexibility and applicability of the detonation actuator 100, and enabling the detonation actuator 100 to adapt to various complex working environments.

[0088] In some embodiments of the present application, as shown in FIG. 6, the plurality of pistons 2 further includes a third piston 25, and the plurality of exhaust ports 312 further includes a third exhaust port 3123, and the third piston 25 is arranged opposite to the third exhaust port 3123. Therefore, after the detonation of the detonation device 3, the shock wave spreads in the direction of the first exhaust port 3121, the second exhaust port 3122 and the third exhaust port 3123 through the detonation cavity 311 on the base 31, so that the first piston 23, the second piston 24 and the third piston 25 extend out of the corresponding openings 11 from the end away from the cartridge 32 to cut off the corresponding load-carrying components 200, thereby realizing the three-way synchronous driving output of the detonation actuator 100.

[0089] Of course, the detonation actuator 100 of the present application is not limited to this, and the piston 2 can be one, and the exhaust port 312 and the opening 11 can also be one. Thus, after the detonation device 3 is detonated, the shock wave spreads in the direction of the exhaust port 312 through the detonation cavity 311 on the base 31, so that the end of the piston 2 away from the detonation device 3 extends out of the opening 11 to cut off the corresponding load-bearing part, thereby realizing the one-way output or multi-way synchronous driving output of the detonation actuator 100.

[0090] In some embodiments of the present application, as shown in FIGS. 1, 2, 4 and 6, the detonation actuator 100 further comprises a fixing component 5. Among them, the fixing component 5 covers the outer wall of the shell 1 covering the detonation device 3. Thus, the shell 1 is protected by the fixing component 5 from displacement, deformation or cracking under the action of the shock wave of the detonation device 3, thereby preventing the piston 2 from being unable to cut off the load-bearing component 200 due to the displacement of the shell 1. At the same time, the setting of the fixing component 5 reduces the radial deformation of the shell 1 in the direction away from the central axis of the piston 2 as much as possible, so as to ensure that the piston 2 is radially deformed in the direction away from the central axis of the piston 2 and is interference connected with the shell 1, thereby improving the reliability.

[0091] In some embodiments of the present application, after the detonation device 3 is detonated, the shell 1 cooperating with the piston 2 is radially deformed in the direction away from the central axis of the piston 2, and the radial deformation amount of the shell 1 cooperating with the piston 2 in the direction away from the central axis of the piston 2 is less than the radial deformation amount of the piston 2 in the direction away from the central axis of the piston 2. Thus, through such a setting, it is further ensured that the piston 2 is radially deformed in the direction away from the central axis of the piston 2 and is interference connected with the shell 1, thereby improving the reliability of the detonation actuator 100.

[0092] In some embodiments of the present application, the piston 2 is an elastic deformation member. Thus, after the detonation device 3 is detonated, the piston 2 is an elastic deformation member to make the piston 2 realize radial deformation in the direction away from the central axis of the piston 2 and interference connected with the shell 1. For example, the piston 2 is a rubber member.

[0093] The motor controller Z of the embodiments of the present application is described below.

[0094] According to the motor controller Z of the embodiments of the present application, as shown in FIG. 11, it comprises a three-phase copper bar and a detonation actuator 100, and the detonation actuator 100 is used to cut off at least two of the three-phase copper bar.

[0095] It can be understood that the three-phase copper bar of the motor controller Z is connected with the motor, and the motor controller Z is also connected with the battery. When the detonation device 3 is not detonated, the three-phase copper bar can be normally powered, thereby ensuring the circuit communication between the battery, the motor controller Z and the motor, so that the motor works normally.

[0096] As shown in FIGS. 1-3, when the current is abnormal and the detonating device 3 detonates, the piston 2 is rapidly moved towards the direction of the three-phase copper bars under the action of the shock wave, so that part of the piston 2 extends out of the shell 1 from the opening 11 and cuts off at least two of the three-phase copper bars, thereby cutting off the loop between the battery and the motor, disconnecting the three-phase alternating current between the motor controller Z and the motor, and achieving the open circuit effect of the motor controller Z, thereby avoiding the risk of combustion and fire caused by the motor dragging large current after short circuit, effectively protecting the motor, thereby preventing serious battery accidents and effectively improving the safety in use.

[0097] At the same time, by at least the piston 2 being deformed radially towards the direction away from the central axis of the piston 2 and being interference connected with the shell 1, the piston 2 is effectively prevented from moving towards the direction away from the three-phase copper bars due to the decrease in air pressure after the detonating device 3 explodes and burns, the piston 2 is ensured to cut off the three-phase copper bars, and the residue generated after the detonating device 3 detonates is prevented from leaking from the gap between the piston 2 and the shell 1, thereby reducing the downtime, maintenance and cleaning time caused by residue leakage, and improving the safety and reliability of the motor controller Z.

[0098] In some embodiments, as shown in FIGS. 1, 2 and 4, the piston 2 is a plurality of spaced-apart pistons and includes a first piston 23 and a second piston 24, the exhaust port 312 is and includes a first exhaust port 3121 and a second exhaust port 3122, the first piston 23 is arranged opposite to the first exhaust port 3121, and the second piston 24 is arranged opposite to the second exhaust port 3122. The opening 11 is a plurality of openings corresponding to the plurality of pistons 2, one end of the first piston 23 away from the first exhaust port 3121 is opposite to one of the copper bars, and one end of the second piston 24 away from the second exhaust port 3122 is opposite to one of the copper bars.

[0099] Therefore, after the detonating device 3 detonates, the shock wave spreads through the detonation cavity 311 on the base 31 towards the direction of the first exhaust port 3121 and the second exhaust port 3122, so that one end of the first piston 23 away from the first exhaust port 3121 extends out of the corresponding opening 11 to cut off the corresponding copper bar, and one end of the second piston 24 away from the second exhaust port 3122 extends out of the corresponding opening 11 to cut off the corresponding copper bar, thereby achieving the function of cutting off two of the three-phase copper bars by the detonation actuator 100.

[0100] It should be noted that the piston 2 of the present application can also be one, and one piston 2 corresponds to two of the three-phase copper bars. Therefore, after the detonating device 3 detonates, the shock wave spreads through the detonation cavity 311 on the base 31 towards the direction of the exhaust port 312, so that one end of the piston 2 away from the exhaust port 312 extends out of the opening 11 to cut off the two copper bars, thereby achieving the function of cutting off two of the three-phase copper bars by the detonation actuator 100.

[0101] According to the motor controller Z of the embodiment of the application, the detonation actuator 100 is arranged to cut off at least two of the three-phase copper bars, so that the loop between the battery and the motor can be cut off, the three-phase alternating current between the motor controller Z and the motor is disconnected, and the disconnection circuit effect of the motor controller Z is realized. Meanwhile, by deforming at least the piston 2 radially towards the direction away from the central axis of the piston 2 and connecting the piston 2 with the shell 1 in interference, the piston 2 is effectively prevented from moving towards the direction away from the three-phase copper bars due to the decrease of air pressure after the explosion and combustion of the detonation device 3, the piston 2 is ensured to cut off the three-phase copper bars, and the residue generated after the detonation of the detonation device 3 is prevented from leaking from the gap between the piston 2 and the shell 1, the downtime, maintenance and cleaning time caused by residue leakage are reduced, and the safety and reliability of the motor controller Z are improved.

[0102] The power assembly Y of the embodiment of the application is described below.

[0103] According to the power assembly Y of the embodiment of the application, the motor controller Z is arranged, and the detonation actuator 100 is arranged to cut off at least two of the three-phase copper bars, so that the loop between the battery and the motor can be cut off, the three-phase alternating current between the motor controller Z and the motor is disconnected, and the disconnection circuit effect of the motor controller Z is realized, thereby improving the reliability and safety of the power assembly Y.

[0104] According to the power assembly Y of the embodiment of the application, the motor controller Z is arranged, and the detonation actuator 100 is arranged to cut off at least two of the three-phase copper bars, so that the loop between the battery and the motor can be cut off, the three-phase alternating current between the motor controller Z and the motor is disconnected, and the disconnection circuit effect of the motor controller Z is realized, thereby improving the reliability and safety of the power assembly Y.

[0105] Meanwhile, by deforming at least the piston 2 radially towards the direction away from the central axis of the piston 2 and connecting the piston 2 with the shell 1 in interference, the piston 2 is effectively prevented from moving towards the direction away from the three-phase copper bars due to the decrease of air pressure after the explosion and combustion of the detonation device 3, the piston 2 is ensured to cut off the three-phase copper bars, and the residue generated after the detonation of the detonation device 3 is prevented from leaking from the gap between the piston 2 and the shell 1, the downtime, maintenance and cleaning time caused by residue leakage are reduced, and the safety and reliability of the power assembly Y are improved.

[0106] The vehicle W of the embodiment of the application is described below.

[0107] According to the vehicle W of the embodiment of the application, the power assembly Y is arranged, and the detonation actuator 100 is arranged to cut off at least two of the three-phase copper bars, so that the loop between the battery and the motor can be cut off, the three-phase alternating current between the motor controller Z and the motor is disconnected, and the disconnection circuit effect of the motor controller Z is realized, thereby improving the reliability and safety of the vehicle W.

[0108] According to the vehicle W of the embodiment of the application, the power assembly Y is arranged, and the detonation actuator 100 is arranged to cut off at least two of the three-phase copper bars, so that the loop between the battery and the motor can be cut off, the three-phase alternating current between the motor controller Z and the motor is disconnected, and the disconnection circuit effect of the motor controller Z is realized, thereby improving the reliability and safety of the vehicle W.

[0109] Meanwhile, by at least the piston 2 radially deforming towards the direction away from the central axis of the piston 2 and being in interference connection with the shell 1, the movement of the piston 2 towards the direction away from the three-phase copper bar caused by the pressure drop after the explosion and combustion of the detonator 3 is effectively avoided, the piston 2 is ensured to cut off the three-phase copper bar, and the leakage of the residue generated after the detonation of the detonator 3 from the gap between the piston 2 and the shell 1 is avoided, the downtime, maintenance and cleaning time caused by the residue leakage are reduced, and the safety and reliability of the vehicle W are improved.

[0110] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0111] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A squib actuator, wherein, The application relates to an explosive actuator (100) comprising: a shell (1) having an opening (11); a piston (2) movably arranged in the shell (1); an explosive device (3) arranged in the shell (1), which, after being exploded, can drive a part of the piston (2) to extend out of the shell (1) from the opening (11), and at least the piston (2) is deformed radially towards a direction away from a central axis of the piston (2) and is in interference connection with the shell (1).

2. The detonation actuator of claim 1, wherein, After the explosive device (3) is exploded, an end of the piston (2) close to the explosive device (3) is deformed radially towards a direction away from a central axis of the piston (2) and is in interference connection with the shell (1), and an end of the piston (2) away from the explosive device (3) extends out of the opening (11).

3. The detonating actuator of any one of claims 1-2, wherein, The piston (2) comprises: a first section (21) having a radial dimension greater than a hole diameter of the opening (11) along a radial direction of the piston (2); a second section (22) having an end connected with an end of the first section (21) away from the explosive device (3) and a radial dimension less than the hole diameter of the opening (11) along the radial direction of the piston (2), and at least a part of the second section (22) can extend out of the shell (1) from the opening (11) after the explosive device (3) is exploded.

4. The detonation actuator of claim 3, wherein, An end face of the first section (21) towards the explosive device (3) is provided with a recess (211), and an open mouth (2111) of the recess (211) is towards the explosive device (3).

5. The detonation actuator of claim 4, wherein, After the explosive device (3) is exploded, the first section (21) is deformed radially towards a direction away from a central axis of the recess (211) gradually increases from a bottom wall of the recess (211) to the open mouth (2111) of the recess (211).

6. The detonation actuator of claim 4, wherein, A cross-sectional area of the recess (211) gradually increases from the bottom wall of the recess (211) to the open mouth (2111) of the recess (211).

7. The detonation actuator of claim 4, wherein, Along a moving direction of the piston (2), a size of the first section (21) is a, and a size of the recess (211) is b, wherein b=a / 10.

8. The detonation actuator of claim 4, wherein, The bottom wall of the recess (211) is further provided with a groove (212).

9. The detonation actuator of claim 8, wherein, Along the moving direction of the piston (2), a size of the first section (21) is a, and a size of the groove (212) is c, wherein c=6a / 10-7a / 10.

10. The detonation actuator of claim 8, wherein, Along a radial direction of the first section (21), a size of the first section (21) is d, and a size of the groove (212) is e, wherein e=d / 5-d / 6.

11. The detonating actuator of claim 10, wherein, A peripheral wall of the first section (21) has a sealing groove (213) extending along a circumferential direction of the piston (2), and the explosive actuator (100) further comprises: a sealing ring (4) located in the sealing groove (213) and in sealing connection with the shell (1).

12. The detonating actuator of claim 11, wherein, The sealing groove (213) is arranged opposite at least part of the groove (212).

13. The detonation actuator of claim 3, wherein, The cross-sectional area of the second section (22) remains unchanged along the direction of the central axis of the piston (2); Or, along the direction of the central axis of the piston (2), the piston (2) comprises a first sub-section (221) and a second sub-section (222), the first sub-section (221) is located at one end of the second sub-section (222) away from the first section (21), and the cross-sectional area of the first sub-section (221) gradually decreases along the direction of the central axis of the piston (2) in the direction from the detonator (3) to the first section (21), and the cross-sectional area of the second sub-section (222) remains unchanged along the direction of the central axis of the piston (2).

14. The detonating actuator of any one of claims 1-13, wherein, Part of the outer wall surface of the piston (2) and the inner wall surface of the shell are fitted.

15. The detonating actuator of any one of claims 1-14, wherein, The detonator (3) comprises: a base (31) located in the shell (1) and connected with the shell (1), the base (31) has a detonation cavity (311), the detonation cavity (311) has an exhaust port (312), the exhaust port (312) is arranged opposite to the piston (2); a powder box (32) located in the detonation cavity (311); a fuse (33) connected with the powder box (32) at one end and extending out of the shell (1) through the base (31).

16. The detonating actuator of claim 15, wherein, The pistons (2) are spaced apart and comprise a first piston (23) and a second piston (24), the exhaust ports (312) are multiple and comprise a first exhaust port (3121) and a second exhaust port (3122), the first piston (23) is arranged opposite to the first exhaust port (3121), the second piston (24) is arranged opposite to the second exhaust port (3122), and the openings (11) are multiple and correspond one-to-one to the pistons (2).

17. The detonation actuator of claim 16, wherein, The pistons (2) further comprise a third piston (25), and the exhaust ports (312) further comprise a third exhaust port (3123), the third piston (25) is arranged opposite to the third exhaust port (3123).

18. The detonating actuator of any one of claims 1-17, wherein, Further comprising: a fixing component (5) covering the outer wall of the shell (1) and the outer wall of the detonator (3).

19. The detonating actuator of any one of claims 1-18, wherein, After the detonator (3) is detonated, the shell (1) cooperating with the piston (2) is deformed radially towards the direction away from the central axis of the piston (2), and the amount of radial deformation of the shell (1) cooperating with the piston (2) towards the direction away from the central axis of the piston (2) is less than the amount of radial deformation of the piston (2) towards the direction away from the central axis of the piston (2).

20. The detonating actuator of any one of claims 1-19, wherein, The piston (2) is an elastically deformable member.

21. An electric machine controller, wherein, Comprising: a three-phase copper bar; The detonation actuator (100) according to any one of claims 1-20 is used to cut off at least two phases of the three-phase copper bar.

22. A powertrain, wherein, Comprising the motor controller (Z) according to claim 21. Comprising the motor controller (Z) according to claim 21.

23. A vehicle, wherein, The powertrain (Y) according to claim 22. The powertrain (Y) according to claim 22.

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