Punch, circuit breaker, power assembly and vehicle

Abstract

The utility model discloses a punch, circuit breaker, power assembly and vehicle, the punch is applied to the circuit breaker, the punch is placed in the operation cavity of the circuit breaker shell, when the circuit breaker works, the punch is pushed to move out of the operation cavity from the operation opening of the shell, the punch is provided with a gas gathering groove, the gas gathering groove is arranged on one side of the punch facing the operation cavity, and the gas gathering groove is communicated with the operation cavity. According to the invention, the structural characteristics of the punch are improved, so that the punch can form a certain pressure regulating effect in the use process of the circuit breaker, the impact force of the punch is improved, and the use effect of the circuit breaker is improved.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to a punch, a circuit breaker, a power assembly and a vehicle, wherein the punch is applied to the circuit breaker. Background Art

[0002] A circuit breaker is an electrical device used for circuit protection. Its main function is to automatically cut off the circuit when a circuit fault occurs (such as overload or short circuit) to protect the circuit and equipment from damage. Circuit breakers are an indispensable part of the power system, and they ensure the safe and stable operation of the power system.

[0003] However, during the operation of the existing circuit breaker, the force on the punch depends on the amount of gunpowder in the gunpowder bag. Since the amount of gunpowder in the gunpowder bag has a certain error, the explosion effect of the gunpowder bag is difficult to fully match the actual needs of the circuit breaker. Once the amount of gunpowder in the gunpowder bag is too small, the explosion pressure formed by the explosion of the gunpowder bag in the working chamber is too small, and the punch may not be able to break the copper busbar, resulting in ineffective operation of the circuit breaker. Therefore, it is urgent to solve the above problem to improve the use effect of the circuit breaker. Utility Model Content

[0004] In view of this, the present application provides a punch, a circuit breaker, a powertrain and a vehicle, wherein the punch is applied to the circuit breaker, and the structural characteristics of the punch are improved so that the punch can form a certain voltage regulation effect during the use of the circuit breaker, thereby improving the impact force of the punch to solve the above-mentioned technical problems.

[0005] A first aspect of an embodiment of the present application provides a punch for a circuit breaker, wherein the punch is placed in an operating chamber of a circuit breaker housing. When the circuit breaker is operating, the punch is pushed out of the operating chamber from an operating port of the housing. A gas gathering groove is provided on the punch, which is located on a side of the punch facing the operating chamber, for increasing the moving speed of the punch from the operating chamber out of the operating port by gathering gas.

[0006] In the present application, the punch has a gas gathering groove. Because the gas gathering groove is formed by a concave plane, and because the bottom of the gas gathering groove is farther away from the gunpowder bag than the planes located on both sides of the gas gathering groove, the gas flow rate flowing through the plane part is greater than the gas flowing through the gas gathering groove. Due to the restriction of the working chamber wall, the gas flowing through the plane part either flows back to the working chamber or flows back to the gas gathering groove, so that the gas pressure in the bottom of the gas gathering groove becomes larger. Therefore, the gas gathering groove of the punch is used to assist the punch in achieving pressure regulation operation, so as to improve the actual force effect of the punch, and then improve the impact force of the punch. In this way, the operating effect of the punch in the circuit breaker is improved, that is, when the circuit breaker is operating, the punch can improve its own pressure effect under the action of the gas gathering groove, and increase the force of the punch hitting the copper busbar, that is, the hitting effect of the punch on the copper busbar is improved.

[0007] In some embodiments of the first aspect, the gas gathering groove is arranged on the central axis of the punch. In this way, when the gunpowder bag explodes, the thrust of the explosion gas acting on the bottom of the gas gathering groove will not deviate excessively from the central axis of the punch, so that the punch can move along the central axis direction, and the punch will not be stuck in the working cavity due to tilting or deflection, thereby ensuring the movement effect of the punch.

[0008] In some embodiments of the first aspect, the punch includes an impact body and a head, the impact body is used to hit the copper busbar connected to the circuit breaker, and when the circuit breaker is operating, the impact body moves to the outside of the working chamber through the working port; the head is arranged at the end of the impact body, and the head is used to cooperate with the inner wall gap of the working chamber; the gas gathering groove is arranged on the surface of the head away from the impact body side.

[0009] In this way, the bottom of the gas gathering groove faces the gunpowder bag. When the circuit breaker is operating, the gas generated by the explosion of the gunpowder bag can directly act on the bottom wall of the gas gathering groove. Because the amount of gunpowder in the gunpowder bag is certain, the impact force generated by the explosion of the gunpowder bag is certain, and the area of ​​the bottom wall of the gas gathering groove is smaller than the area of ​​the flat head. Therefore, the gas pressure per unit area of ​​the bottom of the gas gathering groove becomes larger. In this way, the striking effect of the punch is improved, thereby improving the use effect of the circuit breaker.

[0010] In some embodiments of the first aspect, the gas gathering groove is recessed on the surface of the head along the axial direction of the impact body to ensure that the punch moves and breaks the target copper bar.

[0011] In some embodiments of the first aspect, the slot size of the gas gathering slot is larger than the slot bottom size of the gas gathering slot, thereby enhancing the effect of the gas on the punch, so that the punch moves and breaks the target copper busbar.

[0012] In some embodiments of the first aspect, the punch is provided with an air leak hole, which extends along the axial direction of the impact body and penetrates the impact body and the head. The air leak hole is used to connect the working chamber with the space outside the circuit breaker housing. During the installation of the circuit breaker, the air in the working chamber can be discharged to the external space of the circuit breaker through the air leak hole, and during the operation of the circuit breaker, part of the gas in the working chamber can be discharged to the external space of the circuit breaker through the air leak hole. In this way, the thrust effect of the gas inside the working chamber on the punch can be reduced to a certain extent.

[0013] In some embodiments of the first aspect, a sealing ring is provided on the outer periphery of the head, and the sealing ring has an interference fit with the wall of the working chamber, so that the gas pressure generated by the explosion of the gunpowder bag can fully act on the punch, causing the punch to move under force and break the target copper bar.

[0014] In some embodiments of the first aspect, the head is provided with a sealing groove, a sealing ring is provided in the sealing groove, a first space is formed between the sealing ring and the bottom of the sealing groove, and the head is also provided with an exhaust groove, which can connect the first space with the working chamber.

[0015] In some embodiments of the first aspect, the head portion is fitted with a clearance between the cavity wall of the working cavity, the exhaust groove is recessed in the groove bottom of the sealing groove, and extends from the groove wall of at least one sealing groove to the outer peripheral wall of the head portion, so that during the process of inserting the punch into the working cavity, part of the air in the working cavity can be discharged to the external space of the circuit breaker through the exhaust groove, so that the punch can be smoothly inserted into the working cavity.

[0016] A second aspect of an embodiment of the present application provides a circuit breaker, comprising a punch and a shell, the shell being provided with an operating chamber and an operating port, wherein the operating chamber is connected to an external space located in the shell through the operating port; the punch is the punch in the first aspect of the embodiment of the present application, the punch having a first position and a second position relative to the shell, and when the punch is located at the first position, the punch is located in the operating chamber; when the punch is pushed to move from the first position to the second position relative to the shell, the punch moves along the opening direction of the operating port, and at least a portion of the punch moves from the operating port to the outside of the operating chamber to break the target copper busbar.

[0017] In some embodiments of the second aspect, there are multiple operating ports and multiple punches, and the operating ports and the punches correspond one to one, so as to improve the operating speed and operating effect of the circuit breaker.

[0018] In some embodiments of the second aspect, the shell is further provided with an installation through hole, and the opening direction of the installation through hole is perpendicular to the opening direction of the working port; the circuit breaker is provided with a power connection terminal and an ignition terminal, the power connection terminal is exposed from the installation through hole to the shell, and the ignition terminal is located in the working cavity; when the circuit breaker is operating, the power connection terminal is energized to enable the ignition terminal to ignite, so that the punch moves along the opening direction of the working port, thereby avoiding affecting the stable connection between the igniter and the shell, and facilitating the operation difficulty when the user assembles the circuit breaker.

[0019] In some embodiments of the second aspect, the circuit breaker is further provided with a short-circuit bar, and both ends of the short-circuit bar are respectively connected to an electrical terminal so that the two electrical terminals are electrically connected. In this way, the gunpowder bag is prevented from being detonated due to its own static electricity during transportation of the circuit breaker, resulting in ineffective operation of the circuit breaker.

[0020] In some embodiments of the second aspect, the shell is provided with a guide slope in the working chamber, and the guide slope is used to guide and disperse the gas, so that the gas can flow along the guide slope to prevent the gas from gathering in the working chamber away from the punch position, thereby further improving the operating effect of the circuit breaker.

[0021] A third aspect of the present application provides a power assembly, which includes a motor, a motor controller and the circuit breaker mentioned in the second aspect of the present application, wherein the motor and the motor controller are connected through a load-bearing component, and the circuit breaker is used to disconnect the load-bearing component.

[0022] A fourth aspect of the present application provides a vehicle, which includes the circuit breaker mentioned in the second aspect of the present application, or the powertrain mentioned in the third aspect of the present application.

[0023] Among them, please refer to the first aspect for the beneficial effects of the second to fourth aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A top view of the circuit breaker in this application;

[0026] Figure 2 for Figure 1 Left side view of the circuit breaker;

[0027] Figure 3 for Figure 1 An axial cross-sectional view of the circuit breaker along a first direction;

[0028] Figure 4 for Figure 1 A structural diagram of an embodiment of a middle punch;

[0029] Figure 5 for Figure 1 A cross-sectional view of another embodiment of the middle punch;

[0030] Figure 6 for Figure 1 A cross-sectional view of another embodiment of the middle punch;

[0031] Figure 7 A schematic diagram of the structure of a vehicle in this application;

[0032] Figure 8 This is a schematic diagram of the structure of another vehicle in this application.

[0033] Description of Figure Numbers:

[0034] 100-circuit breaker, 1-punch, 10-head, 101-gas gathering groove, 102-exhaust groove, 104-sealing ring, 105-first space, 106-sealing groove, 11-impact body, 111-vent hole, 2-housing, 20-working chamber, 21-working port, 22-mounting through hole, 26-guide slope, 4-igniter, 40-electrical connection end, 41-ignition end, 5-gunpowder bag, 6-short-circuit bar, 200-power assembly, 210-motor, 220-motor controller, 230-load-carrying component, 300-vehicle, A-first direction, B-second direction. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application is clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application.

[0036] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meaning as understood by a person of ordinary skill in the field to which this application belongs. The words "one", "an" or "the" and the like used in this application do not indicate a quantitative limitation, but are only used to indicate the presence of at least one. The words "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] The following will be combined with the attached examples of the present application Figure 1-Figure 6 , clearly and completely describe the technical solutions in the embodiments of the present application, as well as the prior art embodiments related to the present application.

[0039] Please refer to Figures 1 to 3The present application provides a circuit breaker 100, including a housing 2 and a punch 1, wherein the working chamber 20 is connected to the external space of the housing 2 through the working port 21, and the punch 1 has a first position and a second position relative to the housing 2. When the punch 1 is located at the first position, the punch 1 is located in the working chamber 20; when the punch 1 is pushed to move from the first position to the second position relative to the housing 2, the punch 1 moves along the opening direction of the working port 21, and at least part of the punch 1 moves from the working port 21 to the outside of the working chamber 20 to break the target copper bar. The punch 1 is placed in the working chamber 20 of the housing 2 of the circuit breaker 100. When the circuit breaker 100 is in operation, the punch 1 is pushed to move out of the working chamber 20 from the working port 21 of the housing 2, wherein the punch 1 is provided with a gas gathering groove 101 along its central axis direction, and the gas gathering groove 101 is located on the side of the punch 1 facing the working chamber 20, so as to increase the moving speed of the punch 1 from the working chamber 20 to the working port 21 by gathering gas.

[0040] It should be understood that the circuit breaker 100 may be provided with Figure 3 The igniter 4 and the gunpowder bag 5 shown in the figure, wherein the igniter 4 is used to ignite the gunpowder bag 5. When the igniter 4 ignites the gunpowder bag 5, the gunpowder bag 5 explodes, and the working chamber 20 is quickly filled with a large amount of gas. The air pressure generated by the large amount of gas pushes the punch 1 to move to break the target copper busbar and achieve the circuit-breaking effect.

[0041] It should be noted that, whether it is a machine-made gunpowder bag 5 or a manually-made gunpowder bag 5, its amount of gunpowder will always be affected by factors such as mechanical errors and manual errors, and it is difficult to completely match the amount of gunpowder required for the circuit breaker 100 to strike the copper bar. Therefore, the present application also provides a punch 1 suitable for the above-mentioned circuit breaker 100, which can be referred to Figures 4 to 6 The punch 1 is placed in the working chamber 20 of the housing 2 of the circuit breaker 100. When the circuit breaker 100 is operating, the punch 1 is pushed to move out of the working chamber 20 from the working port 21 of the housing 2. The punch 1 is provided with a gas gathering groove 101 along its central axis. The gas gathering groove 101 is located on the side of the punch 1 facing the working chamber 20, so as to increase the moving speed of the punch 1 from the working chamber 20 to the working port 21 by gathering gas.

[0042] Specifically, the punch 1 has a gas gathering groove 101. Since the gas gathering groove 101 is formed by a concave plane, and since the bottom of the gas gathering groove 101 is farther away from the gunpowder bag 5 than the planes located on both sides thereof, the gas flow rate flowing through the plane part is greater than the gas flowing through the gas gathering groove 101. Due to the restriction of the wall of the working chamber 20, the gas flowing through the plane part either flows back to the working chamber 20 or flows back to the gas gathering groove 101, so that the gas pressure in the bottom of the gas gathering groove 101 becomes larger. Therefore, the gas gathering groove 101 of the punch 1 is used to assist the punch 1 in realizing the pressure regulation operation, so as to improve the actual force effect of the punch 1, and then improve the impact force of the punch 1. In this way, the operating effect of the punch 1 in the circuit breaker 100 is improved, that is, when the circuit breaker 100 is operating, the punch 1 can improve its own pressure effect under the action of the gas gathering groove 101, and improve the force of the punch 1 hitting the copper bar, that is, the hitting effect of the punch 1 on the copper bar is improved.

[0043] From another perspective, during the use of the circuit breaker 100, the gas gathering groove 101 is used to assist the punch 1 in achieving the voltage regulation operation to improve the actual force effect of the punch 1. Therefore, when the specification requirements of the circuit breaker 100 are different, the circuit breaker 100 does not need to replace the gunpowder bag 5. Instead, the circuit breaker 100 can install different punches 1 accordingly so that the effect of the punch 1 hitting the copper busbar can meet the actual needs of the electrical equipment, thereby preventing the punch 1 from over-hitting or under-hitting and affecting the use effect of the electrical equipment.

[0044] Please refer to Figure 5 and Figure 6 In some embodiments, the gas gathering groove 101 is arranged on the central axis of the punch 1. In this way, when the gunpowder bag 5 explodes, the thrust of the explosion gas acting on the bottom of the gas gathering groove 101 will not deviate excessively from the central axis of the punch 1, so that the punch 1 can move along the central axis direction, and the punch 1 will not be stuck in the working chamber 20 due to tilting or deflection, thereby ensuring the movement effect of the punch 1.

[0045] Specifically, refer to Figure 5 and Figure 6 In some embodiments, the punch 1 includes an impact body 11 and a head 10. The impact body 11 is used to hit the copper busbar connected to the circuit breaker 100. When the circuit breaker 100 is operating, the impact body 11 moves to the outside of the working chamber 20 through the working port 21; the head 10 is arranged at the end of the impact body 11, and the head 10 is used to cooperate with the inner wall gap of the working chamber 20; the gas gathering groove 101 is arranged on the surface of the head 10 away from the impact body 11. When the punch 1 is installed into the inner side of the shell 2, the gas gathering groove 101 extends into the working chamber 20, so as to be able to play its role in regulating the force on the punch 1.

[0046] In this way, when the punch 1 is installed in the working chamber 20, the bottom of the gas gathering groove 101 faces the gunpowder bag 5. When the circuit breaker 100 is operating, the gas generated by the explosion of the gunpowder bag 5 can directly act on the bottom wall of the gas gathering groove 101. Because the amount of gunpowder in the gunpowder bag 5 is certain, the impact force generated by the explosion of the gunpowder bag 5 is certain, and the area of ​​the bottom wall of the gas gathering groove 101 is smaller than the area of ​​the flat head 10. Therefore, the gas pressure per unit area of ​​the bottom of the gas gathering groove 101 becomes larger. In this way, the striking effect of the punch 1 is improved, and the use effect of the circuit breaker 100 is improved.

[0047] Furthermore, in some embodiments, the gas gathering groove 101 is recessed on the surface of the head 10 along the axial direction of the impact body 11, so that when the circuit breaker 100 is operating, the gas generated by the explosion of the gunpowder bag 5 acts more directly on the bottom of the groove of the punch 1 to ensure that the punch 1 moves and breaks the target copper busbar.

[0048] In some embodiments, the slot size of the gas gathering slot 101 is larger than the slot bottom size of the gas gathering slot 101. When the circuit breaker 100 is operating, the slot side walls of the gas gathering slot 101 form a certain guiding effect on the gas, so that the gas flows along the side slot side walls of the gas gathering slot 101 and gathers at the slot bottom. In this way, the effect of the gas on the punch 1 is enhanced, so that the punch 1 moves and breaks the target copper busbar.

[0049] Please refer to Figure 6 In some embodiments, the punch 1 is provided with an air leakage hole 111, which extends along the axial direction of the impact body 11 and penetrates the impact body 11 and the head 10. In this way, during the installation of the circuit breaker 100, the air in the working chamber 20 can be discharged to the external space of the circuit breaker 100 through the air leakage hole 111, and during the operation of the circuit breaker 100, part of the gas in the working chamber 20 can be discharged to the external space of the circuit breaker 100 through the air leakage hole 111. In this way, the thrust effect of the gas in the working chamber 20 on the punch 1 can be reduced to a certain extent. When the amount of gunpowder bag 5 installed in the circuit breaker 100 is too large, or the force required to break the copper bar is too small, a punch 1 with a vent hole 111 can be used to reduce the gas thrust received by the punch 1 during the operation of the circuit breaker 100. Thus, while ensuring that the punch 1 can break the copper bar, it also prevents the punch 1 from being subjected to excessive force and hitting other components of the electrical equipment, or prevents the punch 1 from jumping out of the working chamber 20 to enter other positions in the internal space of the electronic equipment, thereby interfering with the operation of other components of the electronic equipment, thereby affecting the normal operation of the electronic equipment.

[0050] It should be noted that when the punch 1 is provided with both a vent hole 111 and a gas gathering groove 101, the aperture of the vent hole 111 is much smaller than that of the gas gathering groove 101 to prevent the pressure relief speed of the vent hole 111 from affecting the gas gathering effect of the gas gathering groove 101. It should be understood that the aperture of the vent hole 111 can be improved according to the actual pressure regulation requirements. In some embodiments, the vent hole 111 is a capillary hole, and the punch 1 is made of elastic materials such as rubber. When the gas in the working chamber 20 forms an atmospheric pressure exceeding the atmospheric pressure, the capillary hole opens under the action of the high pressure, so that part of the gas can be discharged to the external space of the circuit breaker 100 through the capillary hole; when the pressure formed by the gas in the working chamber 20 is small or normal, at least the outer port of the capillary hole is in a closed state to prevent the gas inside the working chamber 20 from leaking out.

[0051] Please refer to Figure 3 In some embodiments, a sealing ring 104 is provided on the outer periphery of the head 10, and the sealing ring 104 is interference fit with the cavity wall of the working cavity 20. In this way, when the punch 1 is located in the working cavity 20, the gas generated by the explosion of the gunpowder bag 5 is difficult to overflow from the space between the punch 1 and the cavity wall of the working cavity 20 to the external space of the circuit breaker 100, thereby ensuring the airtightness between the punch 1 and the shell 2. Therefore, the gas pressure generated by the explosion of the gunpowder bag 5 can all act on the punch 1, so that the punch 1 is forced to move and break the target copper busbar.

[0052] For reference Figure 3 and Figure 4 In some embodiments, the head 10 is provided with a sealing groove 106, and the sealing ring 104 is provided in the sealing groove 106. A first space 105 is formed between the sealing ring 104 and the bottom of the sealing groove 106. The head 10 is also provided with an exhaust groove 102, and the exhaust groove 102 can connect the first space 105 with the working chamber 20. In this way, although the sealing ring 104 can enhance the air tightness between the punch 1 and the side wall of the working chamber 20, the first space 105 formed between the sealing ring 104 and the sealing groove 106 is connected to the exhaust groove 102. In the process of inserting the punch 1 into the working chamber 20, part of the air in the working chamber 20 can still be discharged to the external space of the circuit breaker 100 through the exhaust groove 102 and the first space 105, so that the punch 1 can be smoothly installed in the working chamber 20.

[0053] Please refer to Figure 4 In some specific embodiments, the head 10 is matched with the cavity wall of the working cavity 20 to reduce the friction between the punch 1 and the cavity wall of the working cavity 20 during the movement; the exhaust groove 102 is recessed in the groove bottom of the sealing groove 106, and extends from the groove wall of at least one sealing groove 106 to the outer peripheral wall of the head 10, so that when the punch 1 is installed into the working cavity 20, part of the air in the working cavity 20 can be discharged to the external space of the circuit breaker 100 through the exhaust groove 102, so that the punch 1 can be smoothly installed into the working cavity 20.

[0054] Please refer to Figure 3 In some embodiments, there are multiple operating openings 21 and multiple punches 1, and the operating openings 21 correspond to the punches 1 one by one. When there are multiple target copper bars, the installation position of the circuit breaker 100 can be adjusted accordingly so that the operating openings 21 and the target copper bars are placed one by one. In this way, when the circuit breaker 100 is operating, multiple target copper bars can be broken at the same time, thereby improving the operating speed and operating effect of the circuit breaker 100.

[0055] Refer to Figures 1 to 3 In some embodiments, the housing 2 is further provided with a mounting through hole 22, and the opening direction of the mounting through hole 22 (please refer to Figure 3 The second direction B) is perpendicular to the opening direction of the working opening 21 (please refer to Figure 3 The circuit breaker 100 is provided with a power connection terminal 40 and an ignition terminal 41, the power connection terminal 40 is exposed from the mounting through hole 22 to the housing 2, and the ignition terminal 41 is located in the working chamber 20; when the circuit breaker 100 is in operation, the power connection terminal 40 is connected to the ignition terminal 41 to ignite the operation, so that the punch 1 moves along the opening direction of the working opening 21.

[0056] Specifically, when the circuit breaker 100 is in operation, the connecting end 40 is energized, and the current flows to the ignition end 41 to ignite the gunpowder bag 5, which explodes. In a short period of time, the gas formed by the explosion rapidly fills the part of the working chamber 20 located between the ignition end 41, the punch 1 and the shell 2, and forms a high air pressure in the part of the working chamber 20. The high air pressure pushes the punch 1 to move out of the working port 21 to break the target copper busbar. As the punch 1 moves, the air pressure in the working chamber 20 is released. When the air pressure in the working chamber 20 is the same as the external air pressure, the punch 1 stops moving.

[0057] In addition, in the above embodiment, the two punches 1 are distributed along the first direction A, and the power connection end 40 and the ignition end 41 (it should be understood that both ends are arranged on the igniter 4) are distributed along the second direction B. When the circuit breaker 100 is operating, the punch 1 moves along the first direction A. In this way, after the gas pressure in the working chamber 20 acts on the punch 1, the punch 1 squeezes the gas in the reverse direction to generate a reaction force distributed along the first direction A. This part of the force will not act on the igniter 4, so as to avoid affecting the stable connection between the igniter 4 and the housing 2.

[0058] In the above-mentioned embodiment, since the opening direction of the installation through hole 22 is perpendicular to the opening direction of the working opening 21, the power connection terminal 40 can be more intuitively exposed to the user's field of vision, so that the user can perform power connection operations on the circuit breaker 100. In addition, when assembling the circuit breaker 100, due to the different opening directions of the installation through hole 22 and the working opening 21, the installation of the punch 1 will have less interference with the installation of the ignition terminal 41 and the power connection terminal 40, which is convenient for the user's assembly operation.

[0059] Please refer to Figure 3 In some embodiments, the circuit breaker 100 is further provided with a short-circuit bar 6, and both ends of the short-circuit bar 6 are respectively connected to an electrical terminal 40, so that the two electrical terminals 40 are electrically connected, so as to prevent the gunpowder bag 5 from being detonated due to its own static electricity during transportation of the circuit breaker 100, resulting in invalid operation of the circuit breaker 100.

[0060] It should be noted that the resistance of the short-circuit bar 6 is much smaller than the resistance of the ignition end 41 of the igniter 4. Therefore, when the circuit breaker 100 generates static electricity due to friction or shaking, the current of the static electricity is much smaller than the current of the power supply. Therefore, the current generated by the static electricity will flow along the short-circuit bar 6 with a small resistance value, thereby preventing the current from flowing to the ignition end 41 and igniting the gunpowder bag 5, effectively reducing the occurrence of the gunpowder bag 5 being detonated by static electricity.

[0061] However, it should be noted that in the above embodiment, when the circuit breaker 100 is transported for a long distance, after the circuit breaker 100 is transported to the destination, before the circuit breaker 100 is taken out, in order to prevent the circuit breaker 100 from accumulating too much static charge, each circuit breaker 100 product needs to be subjected to static elimination treatment to prevent sparks from occurring due to static electricity when the user or machinery touches the circuit breaker 100, thereby causing the gunpowder bag 5 to be detonated and causing a safety accident.

[0062] Please continue to refer to Figure 3 In some embodiments, the housing 2 is provided with a guide slope 26 in the working chamber 20, and the guide slope 26 is used to guide and disperse the gas, so that the gas can flow along the guide slope 26 to prevent the gas from gathering in the working chamber 20 away from the position of the punch 1, thereby further improving the operating effect of the circuit breaker 100.

[0063] Please refer to Figure 7 and Figure 8 The utility model further proposes a vehicle 300, which includes a powertrain 200, or includes a circuit breaker 100 in any of the aforementioned embodiments; when the vehicle 300 includes the powertrain 200, the powertrain 200 includes a motor 210, a motor controller 220 and the circuit breaker 100 in any of the aforementioned embodiments, the motor 210 and the motor controller 220 are connected through a load-bearing component 230, and the circuit breaker 100 is used to disconnect the load-bearing component 230; the specific structure of the circuit breaker 100 refers to the above-mentioned embodiment. Since the vehicle 300 and the powertrain 200 both adopt all the technical solutions of all the above-mentioned embodiments, the above-mentioned vehicle 300 and the above-mentioned powertrain 200 at least have all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0064] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0065] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A punch, applied to a circuit breaker, characterized in that: The punch is placed in the working cavity of the circuit breaker housing. When the circuit breaker is operating, the punch is pushed to move out of the working cavity from the working port of the housing. A gas gathering groove is provided on the punch. The gas gathering groove is located on the side of the punch facing the working cavity, so as to increase the moving speed of the punch from the working cavity to the working port by gathering gas.

2. The punch according to claim 1, characterized in that The gas gathering groove is arranged on the central axis of the punch.

3. The punch according to claim 1, characterized in that The punch comprises: An impact body, used to strike the copper bar connected to the circuit breaker, and when the circuit breaker is in operation, the impact body moves to the outside of the operating chamber through the operating opening; A head is arranged at the end of the impact body, and the head is used to cooperate with the inner wall of the working chamber. The gas gathering groove is arranged on the surface of the head away from the impact body.

4. The punch according to claim 3, characterized in that The gas gathering groove is recessed on the surface of the head along the axial direction of the impact body.

5. The punch according to claim 4, characterized in that The size of the notch of the gas gathering groove is larger than the size of the groove bottom of the gas gathering groove.

6. The punch according to claim 3, characterized in that The punch is provided with an air leakage hole, which extends along the axial direction of the impact body and penetrates the impact body and the head.

7. The punch according to claim 3, characterized in that A sealing ring is sleeved on the outer periphery of the head, and the sealing ring is interference-fitted with the cavity wall of the working cavity.

8. The punch according to claim 7, characterized in that The head is provided with a sealing groove, the sealing ring is arranged in the sealing groove, a first space is formed between the sealing ring and the bottom of the sealing groove, and the head is also provided with an exhaust groove, and the exhaust groove can connect the first space with the working chamber.

9. The punch according to claim 8, characterized in that The head portion is loosely matched with the cavity wall of the working cavity, the exhaust groove is recessed in the groove bottom of the sealing groove, and extends from the groove wall of at least one sealing groove to the outer peripheral wall of the head portion.

10. A circuit breaker, characterized in that: include: A shell having a working cavity and a working port, wherein the working cavity is connected to an external space of the shell through the working port; and A punch, wherein the punch is the punch according to any one of claims 1 to 9, wherein the punch has a first position and a second position relative to the shell, and when the punch is located at the first position, the punch is located in the working chamber; when the punch is pushed to move from the first position to the second position relative to the shell, the punch moves along the opening direction of the working port, and at least a portion of the punch moves from the working port to the outside of the working chamber to break the target copper busbar.

11. The circuit breaker according to claim 10, characterized in that There are multiple working ports and multiple punches, and the working ports correspond to the punches one by one.

12. The circuit breaker according to claim 10, characterized in that The housing is also provided with a mounting through hole, and the mounting through hole is opened in a direction perpendicular to the opening direction of the working opening; The circuit breaker is provided with a power connection terminal and an ignition terminal, the power connection terminal is exposed from the mounting through hole to the housing, and the ignition terminal is located in the working chamber; When the circuit breaker is in operation, the power connection end is energized to cause the ignition end to ignite, and the punch moves along the opening direction of the operation port.

13. The circuit breaker according to claim 12, characterized in that The circuit breaker is further provided with a short-circuit bar, and both ends of the short-circuit bar are respectively connected to one of the power connection ends, so that the two power connection ends are electrically connected.

14. The circuit breaker according to claim 10, characterized in that The shell is provided with a guide slope in the working chamber, and the guide slope is used to guide and disperse the gas.

15. A powertrain, characterized in that: include: A motor and a motor controller, wherein the motor and the motor controller are connected via a load-bearing component; The circuit breaker according to any one of claims 10 to 14, wherein the circuit breaker is used to disconnect the loaded component.

16. A vehicle, characterized in that: Comprising a circuit breaker according to any one of claims 10-14, or a power assembly according to claim 15.

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