Fast-disconnecting automotive high-voltage circuit breaker

Abstract

This utility model discloses a fast-disconnecting automotive high-voltage circuit breaker, relating to the field of circuit breaker technology. The utility model includes a circuit breaker body and several wiring slots formed on the front side of the circuit breaker body. It further includes: several abutment portions, each disposed within one of the wiring slots; several clamping portions, all installed within the circuit breaker body; each abutment portion includes a pressing component installed within the wiring slot; and an elastic component disposed within the wiring slot. This utility model, by incorporating abutment portions, solves the problem in existing automotive high-voltage circuit breakers where it is inconvenient to limit the fixing bolts used for cable connections during use. Furthermore, vibrations during vehicle operation can cause these fixing bolts to loosen, leading to cable detachment and affecting the overall stability of the cable connection structure.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, and in particular relates to a fast-disconnecting automotive high-voltage circuit safety circuit breaker. Background Technology

[0002] Circuit breakers are core protection devices in electrical systems, enabling circuit connection and disconnection control and abnormal circuit isolation. They are widely used in various power equipment scenarios. Automotive high-voltage circuit safety circuit breakers are specialized protection components adapted to the high-voltage architecture of new energy vehicles. They are suitable for the operating conditions of on-board high-voltage circuits and are used to control the connection and disconnection of the vehicle's high-voltage circuits, ensuring vehicle power supply and maintenance safety. Fast-disconnecting automotive high-voltage circuit safety circuit breakers are specialized devices optimized and upgraded for on-board high-voltage systems, focusing on high-speed disconnection performance and adapting to complex vehicle driving and emergency operating conditions.

[0003] However, existing automotive high-voltage circuit safety circuit breakers are inconvenient to limit the fixing bolts used for cable connections during use. Vibrations during vehicle operation can cause the fixing bolts to loosen, leading to cable detachment and affecting the overall stability of the cable wiring structure. Utility Model Content

[0004] The purpose of this utility model is to provide a fast-disconnecting automotive high-voltage circuit safety circuit breaker. By setting an abutment part, it solves the problem that existing automotive high-voltage circuit safety circuit breakers are inconvenient to limit the fixing bolts used for cable connections during use, and that vibrations during vehicle operation can cause the fixing bolts to loosen, resulting in cable detachment and affecting the overall stability of the cable wiring structure.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a fast-disconnecting automotive high-voltage circuit breaker, comprising a circuit breaker body and a plurality of wiring slots formed on the front side of the circuit breaker body, and further comprising: abutment portions, wherein a plurality of abutment portions are provided and respectively disposed within the plurality of wiring slots; clamping portions, wherein a plurality of clamping portions are provided and each of the clamping portions is installed within the circuit breaker body; the abutment portions include a pressing assembly, wherein the pressing assembly is installed within the wiring slots; and an elastic assembly, wherein the elastic assembly is disposed within the wiring slots; the pressing assembly includes a connecting piece fixedly connected to the inner wall of the wiring slot, the connecting piece extending into the circuit breaker body from the side closest to the circuit breaker body, a fixing bolt being provided on the front side of the connecting piece, a pressing block being provided on the front side of the fixing bolt, a handle being fixedly connected to the front side of the pressing block, and a plurality of limiting rods being fixedly connected to the inner wall of the wiring slots, with the pressing block located between the plurality of limiting rods.

[0006] Furthermore, the clamping part includes a wire clamping assembly, two of which are mounted on the extrusion block; and a transmission assembly, two of which are mounted in the wiring slot, the two wire clamping assemblies being mirror images of each other, and the two transmission assemblies being mirror images of each other.

[0007] Furthermore, the elastic component includes a telescopic protective sleeve fixedly connected to the inner wall of the wiring groove. A locking block is fixedly connected to the side of the telescopic protective sleeve away from the wiring groove. Two elastic elements are provided inside the locking block, both of which are located inside the telescopic protective sleeve. Each elastic element includes a telescopic rod fixedly connected to the inner wall of the locking block. The side of the telescopic rod away from the locking block is fixedly connected to the wiring groove. A spring is sleeved on the outer wall of the telescopic rod. The side of the spring near the locking block is fixedly connected to the locking block, and the side of the spring near the wiring groove is fixedly connected to the wiring groove.

[0008] Furthermore, the clamping assembly includes a connecting sleeve one fixedly connected to the outer wall of the extrusion block, a connecting sleeve two slidably connected to the outer wall of the connecting sleeve one, a clamping block fixedly connected to the rear side of the connecting sleeve two, a telescopic component provided inside the connecting sleeve two, the telescopic component being located inside the connecting sleeve one, the telescopic component including a telescopic rod two fixedly connected to the inner wall of the connecting sleeve one, the side of the telescopic rod two near the connecting sleeve two being fixedly connected to the connecting sleeve two, a spring two sleeved on the outer wall of the telescopic rod two, the side of the spring two near the connecting sleeve one being fixedly connected to the connecting sleeve one, and the side of the spring two near the connecting sleeve two being fixedly connected to the connecting sleeve two.

[0009] Furthermore, the transmission assembly includes a conical block fixedly connected to the inner wall of the wiring groove. The clamping block has an inclined surface on the side near the conical block, the inclined surface is adapted to the conical block, and the inclination of the conical block is the same as the inclination of the inclined surface.

[0010] Furthermore, the circuit breaker body described in this application is modified from the MM1E molded case circuit breaker. First, two phases are connected in series to form a double break point to improve the DC withstand voltage, and the idle poles are properly insulated and sealed. Then, a permanent magnet blowout assembly is added to the arc-extinguishing chamber, grid plates are added, and the arc-starting angle is lengthened. At the same time, the contacts are replaced with silver tin oxide arc-resistant material, while retaining the original repulsive breaking structure. The control module is upgraded, a BMS emergency signal hardware trigger port is added, and a shunt trip device is installed to achieve millisecond-level tripping. Finally, an insulating anti-loosening block is added in the terminal groove, a shallow part removal groove is opened in the shell, and a three-proof sealing treatment is carried out. The internal transmission and insulation main structure are not changed throughout the process, so that it meets the requirements of vehicle-mounted high-voltage DC rapid breaking and shock-resistant environmental resistance.

[0011] This utility model has the following beneficial effects: 1. By setting up an abutment part, during the circuit breaker cable wiring and fixing operation, the locking block of the abutment part is pressed in advance to cause the elastic component to contract and store force, pushing the extrusion block between the limiting structure in the wiring slot and abutting the fixing bolt. After releasing the locking block, the elastic component springs back to reset, and the locking block abuts the front side of the extrusion block to complete the limiting lock. When disassembling the cable, the locking block is pressed again to release the limiting restraint on the extrusion block, and the extrusion block can be removed, releasing the abutment constraint on the fixing bolt. The extrusion block can abut against the fixing bolt, and the locking block can limit and fix the extrusion block in the wiring slot, effectively locking the installation position of the extrusion block, preventing the extrusion block from shifting or loosening, and stabilizing the abutment state of the extrusion block with the fixing bolt, ensuring the overall stability of the cable wiring structure, and providing reliable limiting protection support for circuit breaker wiring operations. 2. By setting up a clamping part, as the extrusion block is pushed into the wiring slot, the clamping part moves synchronously with the extrusion block. Relying on the inclined surface adaptation relationship of the transmission structure, the clamping assembly slides relative to each other and compresses the telescopic structure, allowing the clamping block to gradually approach and clamp the cable. As the extrusion block moves outward and releases the contact with the fixing bolt, the telescopic structure springs back to its original position, causing the clamping assembly to loosen and release the clamping state of the cable, completing the reset of the clamping structure. This allows for secondary clamping and fixing of the cable connected to the wiring piece, further reinforcing the cable connection position, improving the cable installation firmness, preventing the cable from loosening or falling off, strengthening the connection reliability of the high-voltage wiring part of the circuit breaker, and providing further limit protection support for circuit breaker wiring operations.

[0012] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded structural diagram of the contact part of this utility model; Figure 3 This is a partial cross-sectional view of the contact portion of this utility model; Figure 4 This utility model Figure 3 A magnified structural diagram of A in the middle; Figure 5 This is a partial cross-sectional view of the clamping part of this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 101. Circuit breaker body; 102. Wiring groove; 2. Abutment part; 21. Compression assembly; 211. Terminal piece; 212. Fixing bolt; 213. Compression block; 214. Handle; 215. Limiting rod; 22. Elastic assembly; 221. Telescopic protective sleeve; 222. Clamping block; 223. Telescopic rod one; 224. Spring one; 3. Clamping part; 31. Wire clamping assembly; 311. Connecting sleeve one; 312. Connecting sleeve two; 313. Clamping block; 314. Telescopic rod two; 315. Spring two; 32. Transmission assembly; 321. Conical block; 322. Inclined surface. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 As shown, this utility model is a fast-disconnecting automotive high-voltage circuit breaker, including a circuit breaker body 101 and a plurality of wiring slots 102 formed on the front side of the circuit breaker body 101. It also includes: abutment parts 2, of which a plurality of abutment parts 2 are provided and are respectively disposed in the plurality of wiring slots 102; clamping parts 3, of which a plurality of clamping parts 3 are provided and are all installed in the circuit breaker body 101.

[0018] The contact part 2 includes a pressing component 21, which is installed in the wiring groove 102; and an elastic component 22, which is disposed in the wiring groove 102. The pressing component 21 includes a connecting piece 211 fixedly connected to the inner wall of the wiring groove 102. The connecting piece 211 extends into the circuit breaker body 101 from the side near the circuit breaker body 101. A fixing bolt 212 is provided on the front side of the connecting piece 211. A pressing block 213 is provided on the front side of the fixing bolt 212. A handle 214 is fixedly connected to the front side of the pressing block 213. Several limiting rods 215 are fixedly connected to the inner wall of the wiring groove 102. The pressing block 213 is located between the several limiting rods 215. The elastic component 22 includes a telescopic protective sleeve 221 fixedly connected to the inner wall of the wiring groove 102. A locking block 222 is fixedly connected to the side of the telescopic protective sleeve 221 away from the wiring groove 102. Two elastic elements are disposed in the locking block 222. Each elastic element is located inside the telescopic protective sleeve 221. The elastic element includes a telescopic rod 223 fixedly connected to the inner wall of the locking block 222. The side of the telescopic rod 223 away from the locking block 222 is fixedly connected to the wiring groove 102. A spring 224 is sleeved on the outer wall of the telescopic rod 223. The side of the spring 224 near the locking block 222 is fixedly connected to the locking block 222. The side of the spring 224 near the wiring groove 102 is fixedly connected to the wiring groove 102. By setting the abutment part 2, the pressing block 213 can abut against the fixing bolt 212, and the locking block 222 can limit and fix the pressing block 213 in the wiring groove 102, effectively locking the installation position of the pressing block 213, preventing the pressing block 213 from shifting or loosening, and stabilizing the abutment state of the pressing block 213 and the fixing bolt 212, ensuring the overall stability of the cable wiring structure and providing reliable limit protection support for circuit breaker wiring operations.

[0019] The clamping part 3 includes a wire clamping assembly 31, of which two are provided, both of which are mounted on the extrusion block 213; and a transmission assembly 32, of which two are provided, both of which are mounted in the wiring groove 102. The two wire clamping assemblies 31 and the two transmission assemblies 32 are mirror images of each other. The wire clamping assembly 31 includes a connecting sleeve 311 fixedly connected to the outer wall of the extrusion block 213. A connecting sleeve 312 is slidably connected to the outer wall of the connecting sleeve 311. A clamping block 313 is fixedly connected to the rear side of the connecting sleeve 312. A telescopic member is provided inside the connecting sleeve 312. The telescopic member includes a telescopic rod 314 fixedly connected to the inner wall of the connecting sleeve 311. The side of the telescopic rod 314 closest to the connecting sleeve 312 is fixedly connected to the connecting sleeve 312. Spring 315 is fitted on the outer wall of 14. Spring 315 is fixedly connected to connecting sleeve 311 on the side near connecting sleeve 311 and to connecting sleeve 312 on the side near connecting sleeve 312. Transmission assembly 32 includes a conical block 321 fixedly connected to the inner wall of wiring groove 102. An inclined surface 322 is provided on the side of clamping block 313 near conical block 321. Inclined surface 322 is adapted to conical block 321. The inclination of conical block 321 is the same as that of inclined surface 322. By setting clamping part 3, the cable connected to wiring piece 211 can be clamped and fixed for a second time, further strengthening the wiring position of the cable, improving the firmness of cable installation, preventing the cable from loosening or falling off, strengthening the connection reliability of the high voltage wiring part of the circuit breaker, and providing further limit protection support for circuit breaker wiring operation.

[0020] A specific application of this embodiment is as follows: When in use, the circuit breaker body 101 can be installed on the positive main circuit of the high voltage distribution compartment on the output side of the power battery, placed at the rear end of the fuse, and then the fixing bolt 212 can be unscrewed and the cable connected to the terminal piece 211, and then the fixing bolt 212 can be tightened. After tightening, press the locking block 222 to compress the spring 224, compressing it and generating elastic force. At this time, push the pressing block 213 into the wiring slot 102 and let the pressing block 213 be locked between several limit rods 215. Then push the pressing block 213 to press against the fixing bolt 212. Then release the locking block 222, so that under the action of the elastic force of the spring 224, the locking block 222 will reset, thereby locking the front side of the pressing block 213 and completing the restriction. When the pressing block 213 slides, it will cause the inclined surface 322 to press the conical block 321 through the connecting sleeve 1 311 and the connecting sleeve 2 312. Since the conical block 321 is fixed to the wiring groove 102, under the action of the conical block 321, the inclined surface 322 will cause the connecting sleeve 2 312 to slide on the connecting sleeve 1 311. At this time, the spring 2 315 is compressed and generates elastic force. When the connecting sleeve 2 312 slides on the connecting sleeve 1 311, it will cause the clamping block 313 to clamp the cable, further strengthening the fixation. When disassembly is required, press the clip 222 to move it away from the squeezing block 213. Then, pull out several limit rods 215 from the squeezing block 213 to loosen the fixing bolt 212. When the squeezing block 213 moves away from the fixing bolt 212, the clamping part 3 will return to its original position under the action of the spring force of the second spring 315. Then, the fixing bolt 212 can be unscrewed to remove the cable. After the equipment is installed, the circuit breaker body 101 is connected to the high-voltage positive circuit of the vehicle. It will trip instantly when a short circuit occurs or a vehicle collision signal is received, quickly cutting off the high-voltage power supply of the power battery and ensuring the safety of the vehicle circuit.

[0021] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A quick-break type high-voltage circuit safety breaker for automobiles, comprising a breaker body and a plurality of terminal slots formed in the front side of the breaker body, characterized in that, Also includes: The abutting part is provided in a plurality of parts, and the plurality of abutting parts are respectively disposed in a plurality of wiring slots; A clamping part, wherein a plurality of clamping parts are provided, and all of the plurality of clamping parts are installed inside the circuit breaker body; The abutting portion includes a pressing assembly, which is installed within the wiring groove; and An elastic component, wherein the elastic component is disposed within a wiring slot; The extrusion assembly includes a connecting piece fixedly connected to the inner wall of the wiring groove. The connecting piece extends into the circuit breaker body from the side closest to the circuit breaker body. A fixing bolt is provided on the front side of the connecting piece. An extrusion block is provided on the front side of the fixing bolt. A handle is fixedly connected to the front side of the extrusion block. Several limiting rods are fixedly connected to the inner wall of the wiring groove. The extrusion block is located between several limit rods.

2. The fast interrupting automotive high voltage circuit safety disconnect of claim 1, wherein, The clamping part includes wire clamping assemblies, and two wire clamping assemblies are provided, both of which are mounted on the extrusion block; and The transmission assembly includes two components, both of which are installed in the wiring slot. The two clamping components are mirror images of each other, and the two transmission components are mirror images of each other.

3. The fast interrupting automotive high voltage circuit safety disconnect of claim 2, wherein, The elastic component includes a telescopic protective sleeve fixedly connected to the inner wall of the wiring groove. A locking block is fixedly connected to the side of the telescopic protective sleeve away from the wiring groove, and two elastic elements are provided inside the locking block. Both elastic elements are located inside the telescopic protective sleeve.

4. The fast interrupting automotive high voltage circuit safety disconnect of claim 3, wherein, The clamping assembly includes a connecting sleeve one fixedly connected to the outer wall of the extrusion block, a connecting sleeve two slidably connected to the outer wall of the connecting sleeve one, a clamping block fixedly connected to the rear side of the connecting sleeve two, and a telescopic component provided inside the connecting sleeve two. The telescopic component is located inside the connecting sleeve.

5. The fast interrupting automotive high voltage circuit safety disconnect of claim 4, wherein, The transmission assembly includes a conical block fixedly connected to the inner wall of the wiring groove, and the clamping block has an inclined surface on the side near the conical block; The inclined surface is adapted to the conical block.

6. The fast interrupting automotive high voltage circuit safety disconnect of claim 5, wherein, The elastic element includes a telescopic rod fixedly connected to the inner wall of the card block. The side of the telescopic rod away from the card block is fixedly connected to the wiring groove. A spring is sleeved on the outer wall of the telescopic rod. Among them, the side of spring one closest to the card block is fixedly connected to the card block, and the side of spring one closest to the wiring slot is fixedly connected to the wiring slot.

7. The fast interrupting automotive high voltage circuit safety disconnect of claim 6, wherein, The telescopic component includes a telescopic rod two fixedly connected to the inner wall of the connecting sleeve one. The side of the telescopic rod two near the connecting sleeve two is fixedly connected to the connecting sleeve two. A spring two is sleeved on the outer wall of the telescopic rod two. Among them, the side of spring two closest to connecting sleeve one is fixedly connected to connecting sleeve one, and the side of spring two closest to connecting sleeve two is fixedly connected to connecting sleeve two.

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