Circuit breaker and power assembly

Abstract

A circuit breaker and a power assembly. The circuit breaker (100) comprises: a housing assembly (10), the housing assembly (10) comprising a housing (11) and an injection molded member (12), and the housing (11) having openings (111); pistons (20), the pistons (20) being movably arranged in the housing (11); and a detonation device (30), the detonation device (30) being arranged in the housing (11), and upon detonation of the detonation device (30), parts of the pistons (20) being driven to extend out of the housing (11) from the openings (111), wherein the injection molded member (12) fixedly connects the housing (11) and the detonation device (30).

Description

Circuit breaker and power assembly

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 2024211326070, filed on May 22, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of circuit protection devices, and more particularly, to a circuit breaker and a power assembly. BACKGROUND

[0004] The circuit breaker is used to protect the circuit when the circuit overcurrent, and cut off the load component by the gas generated after detonation to push the piston, so as to achieve the effect of disconnecting the circuit. In the related art, the internal structure of the circuit breaker is fixed and unreliable, and the circuit breaker occupies a large space, which cannot meet the installation requirements in a smaller installation space. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a circuit breaker which can achieve the effect of disconnecting the circuit, has high structural connection strength, can be integrated, is convenient to install in a smaller space, and has universality.

[0006] Another object of the present application is to provide a power assembly having the above-mentioned circuit breaker.

[0007] The circuit breaker according to the embodiments of the present application comprises: a housing assembly comprising an outer shell and an injection molding part, the outer shell having an opening; a piston movably arranged in the outer shell; and a detonation device arranged in the outer shell, a part of the piston driven by the detonation device after detonation extending out of the outer shell from the opening, wherein the injection molding part fixedly connects the outer shell and the detonation device.

[0008] According to the circuit breaker provided by the embodiment of the present application, the shell has an opening, the piston is movably arranged in the shell, the detonating device is arranged in the shell, and the part of the detonating device driving the piston after detonation extends out of the shell from the opening. The detonating device can provide power for the piston, so that the piston can quickly move towards the direction of the load-carrying component and cut off the load-carrying component, disconnect the power supply end and the load end connected by the load-carrying component, and realize the circuit breaking effect of the circuit breaker. The injection molding part is fixedly connected with the shell and the detonating device, so that the fixation of the detonating device on the shell assembly is reliable, the connection strength is effectively improved, the integration of the circuit breaker is realized, the manufacturing cost is reduced, the volume of the circuit breaker is reduced, the circuit breaker is convenient to install in a small space, and the universality of the circuit breaker is improved.

[0009] In addition, the circuit breaker provided by the above-mentioned embodiment of the present application can further have the following additional technical features:

[0010] According to the circuit breaker provided by some embodiments of the present application, the injection molding part comprises a body part covering at least part of the outer wall surface of the shell, and a base arranged in the shell and connected with the shell, and at least part of the detonating device is embedded in the base.

[0011] According to some embodiments of the present application, the shell is provided with an outlet, and the detonating device comprises a powder cartridge arranged in the shell and at least partially embedded in the base, and a fuse connected with the powder cartridge at one end and extending out of the shell through the outlet, and the base is connected with the body part at the outlet.

[0012] According to some embodiments of the present application, the injection molding part further comprises an assembly part arranged outside the body part and connected with the body part, one end of the fuse away from the powder cartridge extends into the assembly part, and a short-circuit strip matched with the fuse is arranged in the assembly part.

[0013] According to some embodiments of the present application, the injection molding part comprises a first reinforcing rib connecting the peripheral wall of the assembly part and the outer wall surface of the body part.

[0014] According to some embodiments of the present application, the injection molding part comprises an error-proof column connected with the body part and used for limiting the direction of the circuit breaker.

[0015] According to some embodiments of the present application, the error-proof column comprises a first error-proof column arranged at the middle part of the shell in the length direction and a second error-proof column arranged at one end of the first error-proof column along the length direction of the shell.

[0016] According to some embodiments of the present application, the injection molding part comprises a connecting portion located outside the body portion and connected to the body portion, and a connecting hole is arranged on the connecting portion.

[0017] According to some embodiments of the present application, the injection molding part comprises a second reinforcing rib connecting the connecting portion and the outer wall surface of the body portion.

[0018] According to some embodiments of the present application, the plurality of openings correspond to the plurality of pistons one by one.

[0019] According to some embodiments of the present application, the plurality of openings comprise a first opening and a second opening located at two ends of the length direction of the shell, the plurality of pistons comprise a first piston opposite to the first opening and a second piston opposite to the second opening, and the detonating device is located between the first piston and the second piston.

[0020] According to some embodiments of the present application, the injection molding part comprises a flow guide portion arranged in the shell, the flow guide portion is located between the first piston and the second piston and opposite to the detonating device, a side of the flow guide portion facing the detonating device has a first inclined surface and a second inclined surface arranged along the length direction of the shell, and the first inclined surface and the second inclined surface are inclined to the direction away from each other in the direction away from the detonating device.

[0021] According to some embodiments of the present application, the flow guide portion is respectively abutted with the first piston and the second piston at two ends along the length direction of the shell.

[0022] According to some embodiments of the present application, the circumferential wall of the piston has a sealing groove extending along the circumferential direction of the piston, and the circuit breaker further comprises a sealing ring located in the sealing groove and sealingly connected to the shell.

[0023] According to some embodiments of the present application, the inner wall of the sealing groove is provided with an exhaust groove, the exhaust groove comprises a first communication section arranged on the groove bottom wall of the sealing groove and extending along the axial direction of the piston, a second communication section and a third communication section arranged on the opposite two side walls of the sealing groove and communicated with the first communication section, and the end of the second communication section and the third communication section away from the first communication section extends to the outer circumferential wall of the piston.

[0024] According to some embodiments of the present application, the piston comprises: a first section, the radial length of the first section being greater than the aperture diameter of the opening along the radial direction of the piston; and a second section, one end of the second section being connected to one end of the first section away from the detonating device, the radial length of the second section being less than the aperture diameter of the opening along the radial direction of the piston, at least part of the second section extending out of the shell from the opening after the detonating device is detonated.

[0025] According to some embodiments of the present application, at least one end of the shell in the length direction is provided with a bent-over edge bent over in the direction towards the axis close to the shell, the inner circumferential wall of the bent-over edge defining the opening.

[0026] According to some embodiments of the present application, the bent-over edge is provided with a clearance.

[0027] According to some embodiments of the present application, the end surface of the piston towards the detonating device is provided with a recess recessed away from the detonating device.

[0028] The power assembly according to the embodiments of the present application comprises: a motor and a motor controller connected through a load component; and the circuit breaker according to the embodiments of the present application, which is used to disconnect the load component.

[0029] The power assembly according to the embodiments of the present application has the shell with the opening, the piston movably arranged in the shell, the detonating device arranged in the shell, the part of the piston driven by the detonating device extending out of the shell from the opening after the detonating device is detonated, and the detonating device capable of providing power for the piston, so that the piston can quickly move towards the direction of the load component and cut off the load component, disconnecting the power supply end and the load end connected by the load component, realizing the disconnection effect of the circuit breaker, and the injection molding part fixedly connecting the shell and the detonating device, which can ensure that the detonating device is fixedly and reliably arranged on the shell assembly, effectively improve the connection strength, realize the integration of the circuit breaker, be conducive to reducing the manufacturing cost, and reduce the volume of the circuit breaker, facilitating the installation of the circuit breaker in a smaller space, and being conducive to realizing the universality of the circuit breaker.

[0030] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0032] FIG. 1 is a schematic diagram of a use scenario of a circuit breaker according to the embodiments of the present application;

[0033] Fig. 2 is a front view of the circuit breaker according to an embodiment of the present application;

[0034] Fig. 3 is a sectional view of the circuit breaker according to an embodiment of the present application;

[0035] Fig. 4 is a top view of the circuit breaker according to an embodiment of the present application;

[0036] Fig. 5 is a left view of the circuit breaker according to an embodiment of the present application;

[0037] Fig. 6 is a structural schematic view of a piston of the circuit breaker according to an embodiment of the present application;

[0038] Fig. 7 is a structural schematic view of an initiating device of the circuit breaker according to an embodiment of the present application;

[0039] Fig. 8 is a structural schematic view of a shorting bar of the circuit breaker according to an embodiment of the present application;

[0040] Fig. 9 is a structural schematic view of a housing of the circuit breaker according to an embodiment of the present application.

[0041] Reference signs: 100, circuit breaker; 200, load-carrying component; 210, weak portion; 10, housing assembly; 11, housing; 12, injection molding; 111, opening; 112, outlet; 113, flange; 114, avoiding opening; 121, body portion; 122, base; 123, assembly portion; 124, error-proofing column; 125, connecting portion; 126, connecting hole; 127, flow guiding portion; 20, piston; 21, first piston; 22, second piston; 23, sealing groove; 24, exhaust groove; 201, first section; 202, second section; 231, sealing ring; 241, first communication section; 242, second communication section; 243, third communication section; 30, initiating device; 31, cartridge; 32, fuse; 40, shorting bar; 51, first reinforcing rib; 52, second reinforcing rib; 61, first error-proofing column; 62, second error-proofing column; 71, first opening; 72, second opening; 81, first inclined surface; 82, second inclined surface. DETAILED DESCRIPTION

[0042] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or like reference numerals in different drawings denote the same or like elements or elements having the same or similar functions. The embodiments described below are examples of the present application, which are only used to explain the present application, and cannot be understood as limiting the present application.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 of the present application.

[0044] In the description of the present application, "first feature" and "second feature" can include one or more features, and "a plurality of" means two or more. The "above" or "below" of the first feature relative to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. The "above", "over" and "on" of the first feature relative to the second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in terms of horizontal height.

[0045] The circuit breaker 100 according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0046] Referring to FIGS. 1-5, the circuit breaker 100 according to the embodiments of the present application can include a housing assembly 10, a piston 20 and an initiating device 30.

[0047] Specifically, the housing assembly 10 includes a housing 11 having an opening 111, the piston 20 is movably arranged in the housing 11, and the initiating device 30 is arranged in the housing 11. After the initiating device 30 is initiated, the explosive material inside the initiating device 30 will rapidly burn or explode, releasing a huge amount of energy. These energies rapidly diffuse in the form of gas inside the housing 11, which can drive a part of the piston 20 to extend out of the housing 11 from the opening 111. The initiating device 30 provides power for the piston 20, so that the piston 20 can rapidly move towards the direction of the load-carrying component 200 and cut off the load-carrying component 200, thereby disconnecting the power supply end and the load end connected by the load-carrying component 200, realizing the circuit breaking effect of the circuit breaker 100.

[0048] In addition, as shown in FIGS. 1-5, the shell assembly 10 further comprises an injection molding piece 12, which fixedly connects the outer shell 11 and the detonating device 30. The injection molding piece 12 can ensure that the detonating device 30 is fixedly reliable on the shell assembly 10, effectively improve the connection strength, simplify the process while ensuring the performance, make the manufacturing simple, realize the integration of the circuit breaker 100, have high production efficiency, be conducive to reducing the manufacturing cost, and can reduce the assembly process, save other assembly structures, reduce the size of the circuit breaker 100, facilitate the installation of the circuit breaker 100 in a smaller space, and be conducive to realizing the universality of the circuit breaker 100.

[0049] In the embodiments of the present application, the length of the piston 20 in the axial direction (for example, the left-right direction shown in FIG. 3) can be set according to actual conditions. For example, the length of the piston 20 in the axial direction can be set according to the different breaking requirements of the distance between the circuit breaker 100 and the load-carrying component 200, so as to realize the platformization, facilitate the adjustment of the circuit breaker 100, and realize the universality of the circuit breaker 100.

[0050] It should be noted that, for the convenience of description, the "left-right direction" and other directions in the present application are based on the orientation relationship shown in the drawings, and are not a limitation on the orientation in the actual application process.

[0051] In some embodiments, as shown in FIG. 1, the end of the piston 20 away from the detonating device 30 is opposite to the weak part 210 of the load-carrying component 200, which is configured to be disconnected when impacted. Thus, after the detonating device 30 is detonated, the end of the piston 20 away from the detonating device 30 can cut the weak part 210, ensuring reliable cutting of the load-carrying component 200 and ensuring the circuit breaking effect of the circuit breaker 100. For example, the weak part 210 of the load-carrying component 200 in the direction towards the piston 20 can be formed by cutting part of the structure.

[0052] It should be noted that the shape of the outer shell 11 can be a cylindrical body, a cubic cylinder or a multi-prism structure, and the shape of the piston 20 is the same as that of the outer shell 11. When the shape of the piston 20 is a cubic cylinder or a multi-prism shape, the radial direction of the piston 20 is the radial direction of a circle whose center is the center of the cross section perpendicular to the central axis direction of the piston 20.

[0053] In some embodiments, the outer shell 11, the detonating device 30 and the injection molding piece 12 are integrally injection molded, ensuring reliable connection, high production efficiency, and reducing production cost. For example, the outer shell 11 and the detonating device 30 are placed in an injection mold, and the injection molding process can fix the outer shell 11 and the detonating device 30, ensuring that the outer shell 11 and the detonating device 30 are fixedly reliable.

[0054] In some embodiments, the shell 11 can be a metal piece, and the inner surface of the shell 11 is smooth, which facilitates the movement of the piston 20 in the shell 11, so that the piston 20 moves more smoothly, avoids problems such as jamming, and makes the circuit breaker 100 more reliable in breaking the circuit. For example, the shell 11 can be a seamless steel pipe.

[0055] In some embodiments, the piston 20 can be an injection molded piece 12, which facilitates the processing and manufacturing of the piston 20, ensures the dimensional accuracy and consistency of the piston 20, and reduces production costs.

[0056] According to the circuit breaker 100 of the embodiments of the present application, the shell 11 has an opening 111, the piston 20 is movably arranged in the shell 11, and the detonation device 30 is arranged in the shell 11. After the detonation device 30 is detonated, the part of the piston 20 driven by the detonation device 30 extends out of the shell 11 from the opening 111. The detonation device 30 can provide power to the piston 20, so that the piston 20 can quickly move towards the load carrying component 200 and cut off the load carrying component 200, disconnecting the power supply end and the load end connected by the load carrying component 200, realizing the effect of breaking the circuit of the circuit breaker 100. The injection molded piece 12 fixedly connects the shell 11 and the detonation device 30, which can ensure that the detonation device 30 is fixed and reliable on the shell assembly 10, effectively improves the connection strength, realizes the integration of the circuit breaker 100, is conducive to reducing the manufacturing cost, and can reduce the volume of the circuit breaker 100, facilitating the installation of the circuit breaker 100 in a smaller space, and being conducive to realizing the versatility of the circuit breaker 100.

[0057] In some embodiments of the present application, as shown in FIGS. 1-5, the injection molded piece 12 includes a body portion 121, which covers at least part of the outer wall surface of the shell 11, so that the injection molded piece 12 and the shell 11 are reliably connected, and the body portion 121 can protect the shell 11 from displacement, deformation, cracking, and other conditions under the action of the energy of the detonation device 30, thereby preventing problems such as the piston 20 being unable to cut off the load carrying component 200 due to damage to the shell 11.

[0058] In addition, as shown in FIG. 3, the injection molded piece 12 further includes a base 122, which is located in the shell 11 and connected with the shell 11, ensuring that the base 122 is fixed and reliable in the shell 11, and at least part of the detonation device 30 is embedded in the base 122, which can realize the fixation of the detonation device 30 and ensure the normal work of the detonation device 30.

[0059] Meanwhile, the shell 11 and the detonating device 30 are fixedly connected through the body part 121 and the base 122, which can simplify the process while ensuring the performance, so that the manufacturing is simple, the integration of the circuit breaker 100 is realized, the production efficiency is high, the manufacturing cost is reduced, the assembly process is reduced, other assembly structures can be omitted, the volume of the circuit breaker 100 is reduced, the circuit breaker 100 is convenient to install in a smaller space, and the universality of the circuit breaker 100 is facilitated.

[0060] According to some embodiments of the present application, as shown in FIGS. 3, 7 and 9, the shell 11 is provided with an outlet 112, the detonating device 30 includes a powder box 31 and a fuse 32, the powder box 31 is located in the shell 11, and the powder box 31 is at least partially embedded in the base 122, so that the fixation of the powder box 31 in the shell 11 is ensured. One end of the fuse 32 is connected with the powder box 31, the other end of the fuse 32 extends out of the shell 11 through the outlet 112, and the base 122 and the body part 121 are connected at the outlet 112, so that the fuse 32 is convenient to connect with external structures through the outlet 112, the assembly requirement is met, and the fixation of the detonating device 30 on the shell 11 is ensured. Meanwhile, the fixation of the powder box 31 and the fuse 32 is realized through the base 122, so that the powder box 31 and the fuse 32 will not be mis-fired or failed due to vibration, impact or other external forces during transportation or storage, the reliability and safety of the circuit breaker 100 are improved. For example, the fuse 32 is a melting bridge wire.

[0061] When the circuit breaker 100 needs to cut off the load component 200, an external control or triggering device acts on the fuse 32, so that the fuse 32 is activated and ignites the powder in the powder box 31, thereby releasing a huge amount of energy, which can push the piston 20 to move quickly towards the load component 200 and cut off the load component 200, so as to realize the circuit breaking effect of the circuit breaker 100.

[0062] In the embodiments of the present application, the amount of powder in the powder box 31 can be set according to actual conditions. For example, the amount of powder in the powder box 31 can be set according to the circuit breaking requirement of the circuit breaker 100 with different cutting forces, so as to realize the platformization, facilitate the adjustment of the circuit breaker 100, and realize the universality of the circuit breaker 100.

[0063] In some embodiments, the detonating device 30 is controlled by an electric signal, when receiving an electric signal that the circuit breaker 100 needs to cut off the load component 200, a small current input to the fuse 32 can be converted into a large current, so that the fuse 32 is heated and ignited, so that the fuse 32 can ignite the powder in the powder box 31, realize the detonation of the detonating device 30, and facilitate the control of the detonating device 30.

[0064] In some embodiments of the present application, as shown in FIGS. 1-5, 8, the injection molding part 12 further comprises an assembly part 123, which is arranged outside the body part 121 and connected with the body part 121, and an end of the fuse 32 away from the powder box 31 extends into the assembly part 123, and the assembly part 123 is provided with a short-circuit strip 40 which cooperates with the fuse 32. Thus, the fuse 32 and the short-circuit strip 40 form a loop through the short-circuit strip 40, preventing the risk of the detonator 30 being detonated due to static electricity, ensuring the transportation reliability of the circuit breaker 100, facilitating the transportation of the circuit breaker 100, and providing a stable mounting space for the fuse 32 and the short-circuit strip 40 through the assembly part 123, ensuring the reliable cooperation of the short-circuit strip 40 and the fuse 32, and ensuring the safety of the circuit breaker 100.

[0065] Meanwhile, the housing 11 and the detonating device 30 are fixedly connected through the body part 121, the base 122 and the assembly part 123, which can simplify the process while ensuring the performance, making the manufacturing simple, realizing the integration of the circuit breaker 100, making the production efficiency high, being conducive to reducing the manufacturing cost, and reducing the assembly process, which can eliminate other assembly structures, reduce the volume of the circuit breaker 100, facilitate the installation of the circuit breaker 100 in a smaller space, and be conducive to realizing the universality of the circuit breaker 100.

[0066] It can be understood that the "short-circuit strip 40" is well known to those skilled in the art, which will not be described here.

[0067] In some embodiments, after the assembly of the circuit breaker 100 is completed, the short-circuit strip 40 is finally placed in the assembly part 123, avoiding damage to the short-circuit strip 40, ensuring the reliable cooperation of the short-circuit strip 40 and the fuse 32, and ensuring the safety of the circuit breaker 100.

[0068] According to some embodiments of the present application, as shown in FIGS. 1-5, the injection molding part 12 comprises a first reinforcing rib 51 connecting the outer peripheral wall of the assembly part 123 and the outer wall surface of the body part 121, which can improve the structural strength of the assembly part 123 and the body part 121, thereby improving the structural strength of the injection molding part 12, making the circuit breaker 100 better resist deformation and damage when impacted, avoiding problems such as fracture of the circuit breaker 100, and ensuring the safety in use.

[0069] Meanwhile, the body part 121, the base 122, the assembly part 123 and the first reinforcing rib 51 are formed as the injection molding part 12, so that the process is simplified while the performance is ensured, the manufacturing is simple, the integration of the circuit breaker 100 is realized, the production efficiency is high, the manufacturing cost is reduced, the assembly process is reduced, other assembly structures can be omitted, the volume of the circuit breaker 100 is reduced, the circuit breaker 100 is convenient to install in a smaller space, and the universality of the circuit breaker 100 is realized.

[0070] In the embodiment of the present application, the size of the first reinforcing rib 51 can be set according to actual conditions. For example, the size of the first reinforcing rib 51 can be set according to different breaking forces of the circuit breaker 100 to ensure the structural strength of the circuit breaker 100.

[0071] In some embodiments, as shown in FIGS. 1-5, the first reinforcing rib 51 can be multiple, and the multiple first reinforcing ribs 51 are arranged along the circumferential direction of the assembly part 123. The structural strength of multiple different positions of the assembly part 123 can be improved by the multiple first reinforcing ribs 51, thereby improving the structural strength of the injection molding part 12.

[0072] In the embodiment of the present application, the number of the first reinforcing rib 51 can be flexibly set according to actual conditions. For example, the first reinforcing rib 51 can be two as shown in FIG. 2, or three, four, five, six or more, which are all within the protection scope of the present application.

[0073] In some embodiments of the present application, as shown in FIGS. 2, 3 and 5, the injection molding part 12 includes an error-proof column 124 connected with the body part 121, which is used to limit the direction of the circuit breaker 100. Thus, when the circuit breaker 100 is installed, the error-proof column 124 can ensure that the circuit breaker 100 is accurately aligned with the installation position, avoiding the problems of affecting subsequent installation or use due to incorrect installation direction, and improving the assembly efficiency.

[0074] Meanwhile, the body part 121, the base 122 and the error-proof column 124 are formed as the injection molding part 12, so that the process is simplified while the performance is ensured, the manufacturing is simple, the integration of the circuit breaker 100 is realized, the production efficiency is high, the manufacturing cost is reduced, the assembly process is reduced, other assembly structures can be omitted, the volume of the circuit breaker 100 is reduced, the circuit breaker 100 is convenient to install in a smaller space, and the universality of the circuit breaker 100 is realized.

[0075] In the embodiment of the present application, the specific structure of the error-proof column 124 can be set according to actual conditions. For example, the error-proof column 124 can limit the direction of the circuit breaker 100 by different shapes and numbers.

[0076] For example, in some embodiments, as shown in FIG. 1 and FIG. 3, the error-proofing column 124 includes a first error-proofing column 61 located at the middle of the length direction (e.g., the left-right direction shown in FIG. 3) of the housing 11 and a second error-proofing column 62 located at one end of the first error-proofing column 61 along the length direction of the housing 11. In this way, the orientation of the circuit breaker 100 can be defined by the combination of the first error-proofing column 61 and the second error-proofing column 62, ensuring accurate and reliable positioning, improving the convenience and accuracy of installation, and the structure of the error-proofing column 124 is simple, facilitating processing and manufacturing, and is conducive to reducing production costs.

[0077] According to some embodiments of the present application, as shown in FIG. 1, FIG. 2, FIG. 4 and FIG. 5, the injection molding part 12 includes a connecting portion 125 located outside the body portion 121 and connected to the body portion 121, and the connecting portion 125 is provided with a connecting hole 126, so that a fastener can be passed through the connecting hole 126 to achieve installation and fixation of the circuit breaker 100, ensuring reliable fixation of the circuit breaker 100. At the same time, by forming the body portion 121, the base 122 and the connecting portion 125 into the injection molding part 12, the process can be simplified while ensuring performance, making manufacturing simple, achieving integration of the circuit breaker 100, making production efficient, and being conducive to reducing manufacturing costs, and reducing assembly processes, which can eliminate other assembly structures, reduce the size of the circuit breaker 100, facilitate installation of the circuit breaker 100 in a smaller space, and facilitate the versatility of the circuit breaker 100. For example, the fastener can be a screw or the like.

[0078] In some embodiments, as shown in FIG. 4, the connecting portion 125 is two, and the two connecting portions 125 are located at both ends of the length direction of the housing 11 and at opposite sides of the body portion 121, and the two connecting portions 125 can ensure reliable fixation of the circuit breaker 100, avoiding problems such as deflection, thereby ensuring more reliable circuit breaking of the circuit breaker 100.

[0079] In some embodiments of the present application, as shown in FIG. 1, FIG. 2, FIG. 4 and FIG. 5, the injection molding part 12 includes a second reinforcing rib 52 connected to the outer wall surface of the connecting portion 125 and the body portion 121, which can improve the structural strength of the connecting portion 125 and the body portion 121, thereby improving the structural strength of the injection molding part 12, so that the circuit breaker 100 can better resist deformation and damage when subjected to impact, avoiding problems such as breakage of the circuit breaker 100, and ensuring safety in use.

[0080] Meanwhile, by forming the body part 121, the base 122, the assembly part 123 and the second reinforcing rib 52 into the injection molding part 12, the process can be simplified while the performance is guaranteed, so that the manufacturing is simple, the integration of the circuit breaker 100 is realized, the production efficiency is high, which is conducive to reducing the manufacturing cost, and the assembly process is reduced, other assembly structures can be saved, the volume of the circuit breaker 100 is reduced, the circuit breaker 100 is convenient to install in a smaller space, and the universality of the circuit breaker 100 is realized.

[0081] In the embodiments of the present application, the size of the second reinforcing rib 52 can be set according to actual conditions. For example, the size of the second reinforcing rib 52 can be set according to different breaking forces of the circuit breaker 100 to ensure the structural strength of the circuit breaker 100.

[0082] In some embodiments, as shown in FIGS. 1, 2, 4 and 5, the second reinforcing rib 52 can be multiple, and the multiple second reinforcing ribs 52 are arranged at intervals along the circumferential direction of the connecting part 125. The multiple second reinforcing ribs 52 can improve the structural strength of multiple different positions of the connecting part 125, thereby improving the structural strength of the injection molding part 12.

[0083] In the embodiments of the present application, the number of the second reinforcing rib 52 can be flexibly set according to actual conditions. For example, the second reinforcing rib 52 can be two as shown in FIG. 2, or three, four, five, six or more, which are all within the protection scope of the present application.

[0084] According to some embodiments of the present application, as shown in FIG. 3, the opening 111 can be multiple, and the piston 20 can be multiple, and the multiple pistons 20 correspond to the multiple openings 111 one by one. Thus, after the detonation device 30 is detonated, the detonation device 30 can drive multiple pistons 20 to move out of the corresponding openings 111 and cut off the corresponding load components 200 at the same time, realizing the multidirectional driving output of the circuit breaker 100 and meeting the required use requirements.

[0085] In some embodiments of the present application, as shown in FIG. 3, the plurality of openings 111 includes a first opening 71 and a second opening 72, which are respectively located at both ends of the length direction of the shell 11, the plurality of pistons 20 includes a first piston 21 and a second piston 22, the first piston 21 is opposite to the first opening 71, the second piston 22 is opposite to the second opening 72, and the detonating device 30 is located between the first piston 21 and the second piston 22. Thus, after the detonating device 30 is detonated, the detonating device 30 can simultaneously drive the first piston 21 and the second piston 22 to move quickly and respectively extend from the first opening 71 and the second opening 72 and cut off the corresponding load-bearing components 200, realizing the bidirectional synchronous driving output of the circuit breaker 100. At the same time, the detonating device 30 is located between the first piston 21 and the second piston 22, ensuring that the detonating device 30 can effectively drive the piston 20 to move and complete the function of the circuit breaker 100.

[0086] In some embodiments, as shown in FIG. 1, the load-bearing component 200 is used to connect the motor and the motor controller, the motor controller is connected with the battery, the motor is powered by the battery, the load-bearing component 200 is three, and the load-bearing component 200 is a copper bar in three-phase alternating current. When the detonating device 30 is not detonated, the load-bearing component 200 is not disconnected, the load-bearing component 200 can be normally powered, ensuring the circuit communication between the battery, the motor controller and the motor, so that the motor works normally.

[0087] When the current is abnormal and the detonating device 30 is detonated, the detonating device 30 can simultaneously drive the first piston 21 and the second piston 22 to move quickly and respectively extend from the first opening 71 and the second opening 72, so that the piston 20 can simultaneously cut off two copper bars in three-phase alternating current, thereby cutting off the loop between the battery and the motor, realizing the disconnection of three-phase alternating current between the motor controller and the motor, 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 use safety.

[0088] In some embodiments, the circuit breaker 100 is located in the motor controller, ensuring compact structure and facilitating to reduce the occupied space, and the internal space of the motor controller is small, the shell 11 and the detonating device 30 are fixedly connected through the injection molding part 12, other assembly structures can be omitted, the volume of the circuit breaker 100 is reduced, the circuit breaker 100 is convenient to install in a smaller space, and the required installation demand can be met.

[0089] According to some embodiments of the present application, as shown in FIG. 3, the injection molding part 12 comprises a flow guide part 127, which is arranged in the outer shell 11, is located between the first piston 21 and the second piston 22, and is opposite to the detonation device 30. The flow guide part 127 can improve the structural strength of the outer shell 11, avoid the impact of the detonation device 30 on the outer shell 11 after detonation, and improve the structural strength of the circuit breaker 100.

[0090] In addition, as shown in FIG. 3, the side of the flow guide part 127 facing the detonation device 30 has a first inclined surface 81 and a second inclined surface 82, which are arranged along the length direction of the outer shell 11. In the direction away from the detonation device 30 (for example, the direction from top to bottom shown in FIG. 3), the first inclined surface 81 and the second inclined surface 82 are inclined towards the direction away from each other.

[0091] When the detonation device 30 detonates, the gas generated by the detonation device 30 can be dispersed and guided along the first inclined surface 81 and the second inclined surface 82, which facilitates the extension of the first piston 21 and the second piston 22 from the first opening 71 and the second opening 72 respectively, avoids the problem of energy rebounding and reducing the driving force of the first piston 21 and the second piston 22, ensures the reliable driving of the first piston 21 and the second piston 22, and reduces the damage of energy to other parts, which improves the reliability and durability of the circuit breaker 100.

[0092] At the same time, the flow guide part 127 is part of the injection molding part 12, which can simplify the process while ensuring performance, make the manufacturing simple, realize the integration of the circuit breaker 100, make the production efficiency high, reduce the manufacturing cost, reduce the assembly process, save other assembly structures, reduce the volume of the circuit breaker 100, facilitate the installation of the circuit breaker 100 in a smaller space, and improve the universality of the circuit breaker 100.

[0093] In some embodiments of the present application, as shown in FIG. 3, the two ends of the flow guide part 127 along the length direction of the outer shell 11 respectively abut against the first piston 21 and the second piston 22, which can realize the positioning of the first piston 21 and the second piston 22 in the outer shell 11, ensure the installation of the first piston 21 and the second piston 22, improve the assembly efficiency, and ensure the structural stability and integrity of the circuit breaker 100.

[0094] According to some embodiments of the present application, as shown in FIG. 3 and FIG. 6, the peripheral wall of the piston 20 has a sealing groove 23 extending along the circumferential direction of the piston 20, and the circuit breaker 100 further comprises a sealing ring 231 located in the sealing groove 23, and the sealing ring 231 is in sealing connection with the outer shell 11, that is, the outer peripheral wall of the sealing ring 231 is in interference fit with the inner peripheral wall of the outer shell 11, and the sealing ring 231 can play a sealing and pressure maintaining role. Thus, after the detonation device 30 is detonated, the gas generated by the detonation device 30 can be prevented from flowing out from the gap between the piston 20 and the outer shell 11 by the sealing and pressure maintaining role of the sealing ring 231, so as to ensure that the piston 20 cuts off the load component 200 under the action of the energy generated by the detonation device 30, and ensure the power-off effect of the circuit breaker 100.

[0095] In some embodiments, the sealing member is in interference fit with the groove wall of the sealing groove 23, so as to ensure that the sealing member is fixed reliably in the sealing groove 23, avoid disengagement and other problems, and avoid gas flowing out from the gap between the sealing member and the sealing groove 23, so as to ensure the reliable sealing and pressure maintaining role of the sealing member.

[0096] In some embodiments, as shown in FIG. 3, the outer peripheral wall of the piston 20 is in clearance fit with the inner peripheral wall of the outer shell 11, which facilitates the installation of the piston 20 in the outer shell 11, can reduce the assembly resistance, is conducive to improving the assembly efficiency, and can avoid deformation and other problems caused by wear between the outer peripheral wall of the piston 20 and the inner peripheral wall of the outer shell 11, so as to ensure the reliable operation of the circuit breaker 100.

[0097] In some embodiments, the sealing ring 231 can be an injection molding part 12, which facilitates the processing and manufacturing of the sealing ring 231, and is conducive to reducing the production cost.

[0098] The inventors of the present application found that the sealing ring 231 is sleeved in the sealing groove 23, and then the piston 20 is pushed into the outer shell 11 to realize the assembly of the piston 20, but due to the sealing connection between the sealing ring 231 and the outer shell 11, the assembly of the piston 20 is difficult, which affects the assembly efficiency.

[0099] Therefore, in some embodiments of the present application, as shown in FIG. 6, the inner wall of the sealing groove 23 is provided with an exhaust groove 24, which includes a first communication section 241, a second communication section 242 and a third communication section 243. The first communication section 241 is arranged on the groove bottom wall of the sealing groove 23 and extends in the axial direction of the piston 20 (for example, the left-right direction shown in FIG. 3). The second communication section 242 and the third communication section 243 are arranged on the opposite two side walls of the sealing groove 23, and are in communication with the first communication section 241. The ends of the second communication section 242 and the third communication section 243 away from the first communication section 241 extend to the outer peripheral wall of the piston 20. The structure of the exhaust groove 24 is simple, facilitating the communication of the space on both sides of the piston 20 in the axial direction and the processing and manufacturing of the exhaust groove 24.

[0100] When the piston 20 is installed on the shell 11, the gas between one side of the piston 20 and the shell 11 can be discharged to the other side of the piston 20 in the axial direction through the exhaust groove 24, avoiding excessive pressure or resistance, ensuring convenient installation of the piston 20, reducing installation difficulty, and improving assembly efficiency. After the detonation device 30 is detonated and drives the piston 20 to extend out of the shell 11 from the opening 111, the gas generated by the detonation device 30 between one side of the piston 20 and the shell 11 can be discharged to the other side of the piston 20 in the axial direction through the exhaust groove 24, which can release the internal pressure and avoid damage to the shell 11 caused by high internal pressure, thereby ensuring the safety of the circuit breaker 100.

[0101] According to some embodiments of the present application, as shown in FIGS. 3 and 6, the piston 20 includes a first section 201 and a second section 202. One end of the second section 202 is connected to the end of the first section 201 away from the detonation device 30. In the radial direction of the piston 20, the radial length of the first section 201 is greater than the hole diameter of the opening 111, and in the radial direction of the piston 20, the radial length of the second section 202 is less than the hole diameter of the opening 111. After the detonation device 30 is detonated, at least part of the second section 202 extends out of the shell 11 from the opening 111. Thus, after the detonation device 30 is detonated, at least part of the second end can be ensured to extend out of the opening 111, achieving the requirement of the piston 20 to cut off the load component 200, and avoiding the first section 201 from extending out of the opening 111. The displacement of the piston 20 can be limited, avoiding the whole piston 20 from being pulled out and causing safety hazards, and ensuring the safety of the circuit breaker 100.

[0102] In some embodiments, as shown in FIGS. 3 and 6, the sealing groove 23 is arranged on the first section 201, which can ensure the sealing effect of the sealing ring 231, avoid the gas generated by the detonation device 30 from leaking between the first section 201 and the shell 11, and facilitate the processing and manufacturing of the sealing groove 23.

[0103] In some embodiments of the present application, as shown in FIG. 3, at least one end of the shell 11 in the length direction is provided with a folded edge 113, which is bent in the direction close to the axis of the shell 11. The inner wall of the folded edge 113 defines an opening 111. The folded edge 113 can improve the structural strength of the shell 11 and reduce the radial size of the opening 111 formed at at least one end of the shell 11 in the length direction, preventing the piston 20 from moving out of the opening 111 and causing safety hazards and other problems, thereby ensuring the safety of the circuit breaker 100.

[0104] In some embodiments, after the piston 20 is installed in the shell 11, the at least one end of the shell 11 in the length direction is bent in the direction close to the axis of the shell 11 to form the folded edge 113 by the press riveting process, which facilitates the processing and manufacturing of the folded edge 113 and helps to reduce production costs.

[0105] According to some embodiments of the present application, as shown in FIG. 9, the folded edge 113 is provided with a clearance 114. When the folded edge 113 is bent in the direction close to the axis of the shell 11, the clearance 114 can avoid material thickness accumulation, ensure processing reliability, meet the required processing and manufacturing requirements, reduce the weight of the shell 11, and help to reduce production costs.

[0106] In some embodiments of the present application, the end surface of the piston 20 facing the detonating device 30 is provided with a recess. The recess is recessed away from the detonating device 30. The recess can increase the internal volume between the end of the piston 20 provided with the recess and the shell 11, avoid excessive internal pressure caused by excessive energy of the detonating device 30 after the detonating device 30 is detonated, and be set according to different use conditions to meet different use requirements. In addition, the piston 20 is easy to process and manufacture, which helps to reduce production costs.

[0107] The power assembly according to the embodiments of the present application includes a motor, a motor controller, and the circuit breaker 100 according to the embodiments of the present application. The motor and the motor controller are connected through the load carrying component 200. When the detonating device 30 is not detonated, the load carrying component 200 is not disconnected, and the load carrying component 200 can be normally powered to ensure the circuit communication between the motor controller and the motor, so that the motor can work normally.

[0108] In addition, the circuit breaker 100 can disconnect the load carrying component 200, that is, when the current is abnormal and the detonating device 30 is detonated, the detonating device 30 can drive the piston 20 to move quickly and extend out of the shell 11 from the opening 111, so that the piston 20 can disconnect the load carrying component 200, thereby cutting off the circuit between the motor and the motor controller, effectively protecting the motor, and ensuring the safety.

[0109] Since the circuit breaker 100 according to the embodiment of the present application has the beneficial technical effects described above, the power assembly according to the embodiment of the present application has the following beneficial effects: the housing 11 has the opening 111, the piston 20 is movably arranged in the housing 11, the detonating device 30 is arranged in the housing 11, the part of the detonating device 30 driving the piston 20 after detonation extends out of the housing 11 from the opening 111, the detonating device 30 can provide power for the piston 20, so that the piston 20 can quickly move towards the direction of the load-carrying component 200 and cut off the load-carrying component 200, disconnects the power supply end and the load end connected by the load-carrying component 200, and realizes the circuit breaking effect of the circuit breaker 100, the injection molding part 12 fixedly connects the housing 11 and the detonating device 30, can ensure that the detonating device 30 is fixedly and reliably arranged on the housing assembly 10, effectively improves the connection strength, can realize the integration of the circuit breaker 100, is conducive to reducing the manufacturing cost, and can reduce the volume of the circuit breaker 100, is convenient for installing the circuit breaker 100 in a smaller space, and is conducive to realizing the versatility of the circuit breaker 100.

[0110] The circuit breaker 100 and the other configurations and operations of the power assembly according to the embodiment of the present application are known to those skilled in the art, and will not be described in detail here.

[0111] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0112] In the description of the present application, the description of the terms “embodiment”, “specific embodiment”, “example” and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to 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.

[0113] Although the embodiments of the present application have been shown and described, those skilled 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 circuit breaker, wherein, The application relates to a casing assembly (10) comprising an outer shell (11) having an opening (111) and an injection molding (12), a piston (20) movably arranged in the outer shell (11), and an igniting device (30) arranged in the outer shell (11) and driving a part of the piston (20) to extend out of the outer shell (11) through the opening (111) after being ignited, wherein the injection molding (12) is fixedly connected with the outer shell (11) and the igniting device (30). The injection molding (12) comprises a body part (121) covering at least part of the outer wall surface of the outer shell (11), and a base (122) arranged in the outer shell (11) and connected with the outer shell (11), wherein at least part of the igniting device (30) is arranged in the base (122). The outer shell (11) is provided with an outlet (112), and the igniting device (30) comprises a powder box (31) arranged in the outer shell (11) and at least partially arranged in the base (122), and a fuse (32) connected with the powder box (31) at one end and extending out of the outer shell (11) through the outlet (112) at the other end, wherein the base (122) is connected with the body part (121) at the outlet (112). The injection molding (12) further comprises an assembly part (123) arranged outside the body part (121) and connected with the body part (121), wherein one end of the fuse (32) away from the powder box (31) extends into the assembly part (123), and a short-circuit strip (40) matched with the fuse (32) is arranged in the assembly part (123). The injection molding (12) comprises a first reinforcing rib (51) connecting the peripheral wall of the assembly part (123) and the outer wall surface of the body part (121).

2. The circuit breaker of claim 1, wherein, The injection molding (12) comprises an error-proofing column (124) connected with the body part (121) and used for limiting the direction of the circuit breaker (100). The error-proofing column (124) comprises a first error-proofing column (61) arranged at the middle of the outer shell (11) in the length direction and a second error-proofing column (62) arranged at one end of the first error-proofing column (61) in the length direction of the outer shell (11). The injection molding (12) comprises a connecting part (125) arranged outside the body part (121) and connected with the body part (121), wherein a connecting hole (126) is arranged on the connecting part (125).

3. The circuit breaker of claim 2, wherein, The injection molding (12) comprises a second reinforcing rib (52) connecting the connecting part (125) and the outer wall surface of the body part (121). ​ ​ 4. The circuit breaker of claim 3, wherein, ​ ​ 5. The circuit breaker of claim 4, wherein, ​ ​ 6. The circuit breaker of claim 2, wherein, ​ ​ 7. The circuit breaker of claim 6, wherein, ​ ​ 8. The circuit breaker of claim 2, wherein, ​ ​ 9. The circuit breaker of claim 8, wherein, ​ ​ 10. The circuit breaker of any one of claims 1-9, wherein, The openings (111) are multiple, and the pistons (20) are multiple, and the multiple pistons (20) correspond to the multiple openings (111) one by one.

11. The circuit breaker of claim 10, wherein, The multiple openings (111) include a first opening (71) and a second opening (72), and the first opening (71) and the second opening (72) are located at two ends of the length direction of the shell (11) respectively, and the multiple pistons (20) include a first piston (21) opposite to the first opening (71) and a second piston (22) opposite to the second opening (72), and the detonating device (30) is located between the first piston (21) and the second piston (22).

12. The circuit breaker of claim 11, wherein, The injection molding part (12) includes a flow guide part (127) arranged in the shell (11), and the flow guide part (127) is located between the first piston (21) and the second piston (22) and opposite to the detonating device (30), and a side of the flow guide part (127) facing the detonating device (30) has a first inclined surface (81) and a second inclined surface (82) arranged along the length direction of the shell (11), and the first inclined surface (81) and the second inclined surface (82) are inclined to the direction away from each other in the direction away from the detonating device (30).

13. The circuit breaker of claim 12, wherein, The flow guide part (127) is respectively abutted with the first piston (21) and the second piston (22) at two ends along the length direction of the shell (11).

14. The circuit breaker of any one of claims 1-13, wherein, The peripheral wall of the piston (20) has a sealing groove (23) extending along the circumferential direction of the piston (20), and the circuit breaker (100) further comprises: A sealing ring (231) is arranged in the sealing groove (23) and sealingly connected with the shell (11).

15. The circuit breaker of claim 14, wherein, An exhaust groove (24) is arranged on the groove inner wall of the sealing groove (23), and the exhaust groove (24) comprises: A first communication section (241) is arranged on the groove bottom wall of the sealing groove (23) and extends along the axial direction of the piston (20); A second communication section (242) and a third communication section (243) are respectively arranged on the two side walls of the sealing groove (23) and communicate with the first communication section (241), and one end of the second communication section (242) and the third communication section (243) away from the first communication section (241) extends to the outer peripheral wall of the piston (20).

16. The circuit breaker of any one of claims 1-15, wherein, The piston (20) comprises: A first section (201) along the radial direction of the piston (20), and the radial length of the first section (201) is greater than the hole diameter of the opening (111). A second section (202) is connected to one end of the first section (201) away from the detonating device (30), and the radial length of the second section (202) is smaller than the aperture diameter of the opening (111) in the radial direction of the piston (20), and at least part of the second section (202) extends out of the shell (11) from the opening (111) after the detonating device (30) is detonated.

17. The circuit breaker of any one of claims 1-16, wherein, At least one end of the shell (11) in the length direction is provided with a bent edge (113) bent in the direction towards the axis close to the shell (11), and the inner circumferential wall of the bent edge (113) defines the opening (111).

18. The circuit breaker of claim 17, wherein, The bent edge (113) is provided with a clearance (114).

19. The circuit breaker of any one of claims 1-18, wherein, The end surface of the piston (20) towards the detonating device (30) is provided with a recessed part recessed away from the detonating device (30).

20. A powertrain, wherein, Comprising: A motor and a motor controller connected through a load carrying component (200); The circuit breaker (100) according to any one of claims 1-19 is used to disconnect the load carrying component (200).

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