Resettable current-limiting protector

Abstract

The utility model discloses a self-resetting current-limiting protector, which comprises a shell I, a shell II and a fixing mechanism, jacks are formed in the four corners of the front side face of the first shell respectively, and a current sensor is arranged on the bottom wall of the first shell; four corners of the front side surface of the second shell are respectively provided with internal threaded holes, and the internal threaded holes are in one-to-one correspondence with the front and rear positions of the jacks; the number of the fixing mechanisms is four, and the four fixing mechanisms are arranged between the inner threaded holes and the longitudinally adjacent insertion holes respectively; the self-resetting current limiting protector further comprises a single-chip microcomputer, the single-chip microcomputer is arranged in the middle of the bottom wall of the first shell, the single-chip microcomputer is electrically connected with the current sensor in a bidirectional mode, and mounting holes are formed in the four corners of the rear side face of the first shell respectively. And the current-limiting protector can be quickly disassembled, so that regular maintenance and timely replacement of elements in the current-limiting protector are facilitated, and the flexibility of the current-limiting protector is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical engineering, in particular to a self-resetting current limiting protector. Background Art

[0002] Self-resetting current limiting protectors are widely used in industrial and household circuits. They are usually used in circuits to limit current to prevent circuits or equipment from overload or short circuit. The main function of this protector is to ensure that the current does not exceed the set safety threshold, thereby protecting the circuit and equipment from damage. However, current limiting protectors are composed of two shells;

[0003] The traditional self-resetting current limiting protector aligns the two current limiting protector housings correctly, ensures that the mounting holes between them are completely matched, and then fixes the bolts in the mounting holes of the current limiting protector with a screwdriver and locks the threads with nuts;

[0004] Traditional self-resetting current limiting protectors have the following problems: after long-term use, the stability between the bolts and the nuts is likely to decrease, and when replacing or maintaining the internal components of the current limiting protector, the two current limiting protector shells cannot be quickly disassembled, which will increase the complexity and time cost of maintenance. Since it cannot be disassembled quickly, it is easy for maintenance to be delayed in time. For this reason, we propose a self-resetting current limiting protector. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a self-resetting current limiting protector, which ensures the stability between the two current limiting protector shells, can significantly improve the stability and reliability of the current limiting protector, and can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-resetting current limiting protector, comprising a housing 1, a housing 2 and a fixing mechanism;

[0007] Shell 1: The four corners of the front side are respectively provided with jacks, and the bottom wall of the shell 1 is provided with a current sensor;

[0008] Shell 2: The four corners of the front side are respectively provided with internal thread holes, which correspond to the front and rear positions of the jacks one by one;

[0009] Fixing mechanism: There are four fixing mechanisms, which are respectively arranged between the internal threaded hole and the longitudinally adjacent insertion holes;

[0010] Among them: it also includes a single-chip microcomputer, which is arranged in the middle of the bottom wall of the shell one. The single-chip microcomputer is bidirectionally electrically connected to the current sensor, ensuring the stability between the two current limiting protector shells, and can quickly disassemble the current limiting protector, which is helpful for regular maintenance and timely replacement of components inside the current limiting protector, and improving the flexibility of the current limiting protector.

[0011] Furthermore, four corners of the rear side surface of the housing 1 are respectively provided with mounting holes for easy installation.

[0012] Furthermore, it also includes a display, which is arranged on the front side of the shell 2, and the input end of the display is the output end of the single-chip microcomputer, which is convenient for observing various parameters of the circuit.

[0013] Furthermore, the fixing mechanism includes a mounting plate and a support, the external threads on the outer surface of the support are connected to the internal threads of the longitudinally adjacent internal threaded holes, the rear ends of the supports extend into the interior of the socket, and the front ends of the supports are fixedly connected to the mounting plates for preliminary fixing.

[0014] Furthermore, the fixing mechanism also includes a support rod, a conical block, an avoidance port, an inclined surface extrusion block, a second spring, a sliding column and a sliding hole. The avoidance ports are all opened at the rear end of the pillar, and the inner wall of the avoidance port is opened with evenly distributed sliding holes. The inner wall of the sliding hole is slidably connected with a sliding column, and the end of the sliding column close to the center of the avoidance port is fixedly connected with the inclined surface extrusion block, and the side of the inclined surface extrusion block located in the same avoidance port away from the center of the avoidance port and the inner wall of the adjacent avoidance port are fixedly connected with a second spring, and the second spring is sleeved on the outer surface of the sliding column, and the support rods are fixedly connected to the rear inner wall of the socket, and the front end of the support rods is fixedly connected with a conical block, and the inclined surface of the conical block is matched with the inclined surfaces of the four longitudinally adjacent inclined surface extrusion blocks to achieve a more stable connection.

[0015] Furthermore, the fixing mechanism also includes a slide and a spring. The slides are slidably connected to the middle part of the support rod. The rear end of the slide is provided with a chamfered structure. The rear side of the slide and the rear inner wall of the socket are fixedly connected with a spring. The spring is sleeved on the outer surface of the support rod to facilitate the cancellation of the connection.

[0016] Furthermore, the fixing mechanism also includes nuts, and the nuts are all threadedly connected to the front end of the pillar for fixing.

[0017] Compared with the prior art, the beneficial effects of the utility model are: the self-resetting current limiting protector has the following advantages:

[0018] 1. By rotating the pillar, the external thread on the pillar is threadedly connected with the internal thread hole, so that the pillar moves backward along the center of the internal thread hole until it is completely inserted into the socket. At the same time, during the movement of the pillar, the inclined surfaces of the four inclined surface extrusion blocks contact the inclined surfaces of the conical block. Continuous rotation of the pillar will apply extrusion force to the inclined surface extrusion block, so that the inclined surface extrusion block is squeezed to compress the spring 2, thereby driving the inclined surface extrusion block and the sliding column to move toward the sliding hole, thereby providing avoidance for the entry of the pillar, and then continue to rotate the pillar to move the inclined surface extrusion block to the rear side of the conical block, and through the spring The force of the second causes the inclined extrusion block and the sliding column to rebound and reset, so that the front side of the inclined extrusion block and the rear side of the conical block contact each other. Finally, the pillar is rotated in the opposite direction to move the pillar in the opposite direction of the center of the internal threaded hole until the front side of the inclined extrusion block and the rear side of the conical block are pressed against each other, and then the nut and the thread of the pillar are locked to fix the pillar on the front side of the shell two, thereby achieving a more precise connection and ensuring the stability between the two current limiting protector shells, which can significantly improve the stability and reliability of the current limiting protector.

[0019] 2. When it is necessary to replace or repair the internal components, rotate the pillar in the opposite direction to prepare to withdraw the pillar. At this time, the front side of the inclined extrusion block will contact the chamfered surface of the slider, and push the slider forward, and stretch the spring 1, while driving the slider forward until the slider is moved to contact the rear side of the conical block. However, two inclined surfaces are formed between the two, and by continuously rotating the pillar, the pillar moves forward along the center of the internal threaded hole, ensuring that the slider and the rear side of the conical block can be properly contacted, so that the front sides of the four inclined extrusion blocks are in contact with the chamfered surface of the slider, and the inclined extrusion blocks are squeezed to provide avoidance, thereby driving the pillar to separate from the jack, thereby continuously rotating the pillar and separating from the internal threaded hole, and the current limiting protector can be quickly disassembled, which is helpful for regular maintenance and timely replacement of components inside the current limiting protector, thereby extending the life of the current limiting protector and improving the reliability and flexibility of the current limiting protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the exploded structure of the utility model in cross section;

[0022] Figure 3 It is a schematic diagram of the structure of the utility model enlarged at A;

[0023] Figure 4 It is a schematic diagram of the structure enlarged at B of the utility model.

[0024] In the figure: 1 housing 1, 2 housing 2, 3 fixing mechanism, 301 sliding piece, 302 mounting piece, 303 spring 1, 304 supporting rod, 305 conical block, 306 avoidance opening, 307 inclined extrusion block, 308 spring 2, 309 sliding column, 310 sliding hole, 311 supporting column, 312 nut, 4 display, 5 mounting hole, 6 jack, 7 current sensor, 8 single chip computer, 9 internal threaded hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 , This embodiment provides a technical solution: a self-resetting current limiting protector, comprising a housing 1, a housing 2 and a fixing mechanism 3;

[0027] Shell 1: The four corners of the front side are provided with jacks 6, the bottom wall of the shell 1 is provided with a current sensor 7, and the four corners of the rear side of the shell 1 are provided with mounting holes 5, and then the shell 1 and the shell 2 2, which form a whole, are installed at a designated location through the mounting holes 5;

[0028] Shell 2 2: The four corners of the front side thereof are respectively provided with internal threaded holes 9, and the front and rear positions of the internal threaded holes 9 and the jacks 6 correspond one to one. First, ensure that the jacks 6 on the shell 1 are aligned front to back with the internal threaded holes 9 of the shell 2. It also includes a display 4, which is arranged on the front side of the shell 2. The input end of the display 4 is the output end of the single-chip computer 8. Then the current sensor 7 detects the current change in the circuit in real time and transmits the current information to the single-chip computer 8. After receiving and integrating, the single-chip computer 8 displays the information through the display 4. However, the current sensor 7 continuously monitors the current change in the circuit. The single-chip computer 8 compares the current signal presented to it by the current sensor 7 with the preset current limit value. If the detected current exceeds the set current limit threshold, it will be judged that the circuit has an abnormality such as overload or short circuit. Once it is judged that the circuit has an abnormality, the single-chip computer 8 adjusts the external current limiter to limit the current or cuts off the circuit through an external circuit breaker to prevent the current caused by the overload or short circuit from continuing to flow out;

[0029] Fixing mechanism 3: There are four fixing mechanisms 3, which are respectively arranged between the internal threaded hole 9 and the longitudinally adjacent insertion hole 6. The fixing mechanism 3 includes a mounting plate 302 and a pillar 311. The external threads on the outer surface of the pillar 311 are connected with the internal threads of the longitudinally adjacent internal threaded hole 9. The rear ends of the pillars 311 extend into the inside of the insertion hole 6. The front ends of the pillars 311 are fixedly connected with the mounting plate 302. The fixing mechanism 3 also includes a support rod 304, a conical block 305, an avoidance port 306, an inclined extrusion block 307, a spring 2 308, a sliding column 309 and a sliding hole 310. The avoidance ports 306 are all opened at the rear end of the pillar 311. The inner wall of the avoidance ports 306 is provided with evenly distributed sliding holes 310. The inner wall of the sliding hole 310 is slidably connected with a sliding The column 309 and the end of the sliding column 309 close to the center of the avoidance opening 306 are fixedly connected with an inclined extrusion block 307, and the side of the inclined extrusion block 307 located in the same avoidance opening 306 away from the center of the avoidance opening 306 and the inner wall of the adjacent avoidance opening 306 are fixedly connected with a spring 2 308, and the spring 2 308 is sleeved on the outer surface of the sliding column 309, and the support rod 304 is fixedly connected to the rear inner wall of the socket 6, and the front end of the support rod 304 is fixedly connected with a conical block 305, and the inclined surface of the conical block 305 is matched with the inclined surfaces of the four longitudinally adjacent inclined extrusion blocks 307. The fixing mechanism 3 also includes a slide 301 and a spring 1 303, and the slide 301 is slidably connected to the middle part of the support rod 304, and the rear end of the slide 301 is provided with a chamfered joint The spring 1 303 is fixedly connected between the rear side surface of the slide 301 and the rear inner wall of the socket 6. The spring 1 303 is sleeved on the outer surface of the support rod 304. The fixing mechanism 3 also includes a nut 312. The nut 312 is threadedly connected to the front end of the pillar 311. Next, by rotating the pillar 311, the external thread on the pillar 311 is threadedly connected with the internal threaded hole 9, so that the pillar 311 moves backward along the center of the internal threaded hole 9 until it completely enters the socket 6. At the same time, during the movement of the pillar 311, the inclined surfaces of the four inclined surface extrusion blocks 307 contact the inclined surfaces of the conical block 305. Continuously rotating the pillar 311 will apply an extrusion force to the inclined surface extrusion block 307, so that the inclined surface extrusion block 307 is squeezed to compress the spring 2 308, thereby The inclined surface extrusion block 307 and the sliding column 309 are driven to move toward the sliding hole 310, thereby providing avoidance for the entry of the pillar 311, and then the pillar 311 is continued to rotate to move the inclined surface extrusion block to the rear side of the conical block 305, and the inclined surface extrusion block 307 and the sliding column 309 are rebounded and reset through the force of the spring 2 308, so that the front side of the inclined surface extrusion block 307 and the rear side of the conical block 305 contact each other, and finally, the pillar 311 is rotated in the opposite direction appropriately to move the pillar 311 in the opposite direction along the center of the internal threaded hole 9 until the front side of the inclined surface extrusion block 307 and the rear side of the conical block 305 are pressed against each other, and then the nut 312 is locked with the thread of the pillar 311, so that the pillar 311 is fixed on the front side of the shell 2.Therefore, a more precise connection can be achieved and the stability between the two current limiting protector shells is ensured, which can significantly improve the stability and reliability of the current limiting protector. When the internal components need to be replaced or repaired, the nut 312 is first removed, and then the pillar 311 is rotated, and the external thread on the pillar 311 is threadedly connected with the internal threaded hole 9, so that the pillar 311 moves backward along the center of the internal threaded hole 9. As the pillar 311 moves backward, the inclined surfaces of the four inclined surface extrusion blocks 307 gradually approach and finally touch the front side of the slide 301. When the inclined surface extrusion block 307 contacts the slide 301, the inclined surface extrusion block 307 is squeezed to provide avoidance, thereby making room for the pillar 311 to go further. While the pillar 311 is continuously rotated, the inclined surface extrusion block 307 continues to move to the rear of the slide 301 under the continuous action of the applied pressure as the pillar 311 rotates. After the inclined surface extrusion block 307 moves to the rear of the slide 301, the pillar 311 can be rotated in the opposite direction The support 311 is then pushed forward and the spring 303 is stretched, thereby driving the slide 301 forward until the slide 301 is moved to contact the rear side of the conical block 305. Two inclined surfaces are formed between the two, and the support 311 is continuously rotated, and the support 311 moves forward along the center of the internal threaded hole 9, ensuring that the slide 301 and the rear side of the conical block 305 can be properly contacted, so that the front side of the four inclined surface extrusion blocks 307 are in contact with the chamfered surface of the slide 301, and the inclined surface extrusion blocks 307 are squeezed to provide avoidance, thereby driving the support 311 to separate from the socket 6, thereby continuously rotating the support 311 and separating from the internal threaded hole 9, and the current limiting protector can be quickly disassembled, which is helpful for regular maintenance and timely replacement of components inside the current limiting protector, thereby extending the life of the current limiting protector and improving the reliability and flexibility of the current limiting protector.

[0030] Among them: it also includes a single chip microcomputer 8, which is arranged in the middle of the bottom wall of the housing 1, and the single chip microcomputer 8 is bidirectionally electrically connected to the current sensor 7.

[0031] The working principle of a self-resetting current limiting protector provided by the utility model is as follows: first, ensure that the insertion hole 6 on the shell 1 is aligned with the internal threaded hole 9 of the shell 2, and then, by rotating the pillar 311, the external thread on the pillar 311 is threadedly connected with the internal threaded hole 9, so that the pillar 311 moves backward along the center of the internal threaded hole 9 until it completely enters the insertion hole 6. At the same time, during the movement of the pillar 311, the inclined surfaces of the four inclined surface extrusion blocks 307 contact the inclined surfaces of the conical block 305. Continuously rotating the pillar 311 will apply an extrusion force to the inclined surface extrusion block 307, so that the inclined surface extrusion block 307 is squeezed to compress the spring 2 308, thereby driving the inclined surface extrusion block 307 and the sliding column 309 to move toward the sliding hole 310, thereby 1 is provided to avoid the entry, and then the support column 311 is continued to be rotated to move the inclined surface extrusion block to the rear side of the conical block 305, and the inclined surface extrusion block 307 and the sliding column 309 are rebounded and reset through the force of the spring 2 308, so that the front side of the inclined surface extrusion block 307 and the rear side of the conical block 305 are in contact with each other. Finally, the support column 311 is appropriately rotated in the opposite direction to move the support column 311 in the opposite direction along the center of the internal threaded hole 9 until the front side of the inclined surface extrusion block 307 and the rear side of the conical block 305 are pressed against each other, and then the nut 312 is locked with the thread of the support column 311, so that the support column 311 is fixed on the front side of the shell 2 2, so that a more precise connection can be achieved and the stability between the two current limiting protector shells is ensured. The stability and reliability of the current limiting protector can be significantly improved. Then, the housing 1 and the housing 2 2, which form a whole, are installed at a designated location through the installation hole 5. Then, the current sensor 7 detects the current change in the circuit in real time and transmits the current information to the single-chip microcomputer 8. After receiving and integrating, the single-chip microcomputer 8 displays the information through the display 4. However, the current sensor 7 continuously monitors the current change in the circuit. The single-chip microcomputer 8 compares the current signal presented to it by the current sensor 7 with the preset current limit value. If the detected current exceeds the set current limit threshold, it will be judged that the circuit has an abnormality such as overload or short circuit. Once it is judged that the circuit is abnormal, the single-chip microcomputer 8 adjusts the external current limiter to limit the current or cuts off the circuit through an external circuit breaker. To prevent the current from continuing to flow out due to overload or short circuit, when it is necessary to replace or repair the internal components, first remove the nut 312, then rotate the pillar 311, and thread the pillar 311 with the internal threaded hole 9 through the external thread on the pillar 311, so that the pillar 311 moves backward along the center of the internal threaded hole 9. As the pillar 311 moves backward, the inclined surfaces of the four inclined surface extrusion blocks 307 gradually approach and finally touch the front side of the slide 301. When the inclined surface extrusion blocks 307 contact the slide 301, the inclined surface extrusion blocks 307 are squeezed to provide avoidance, thereby making room for the pillar 311 to go deeper. While the pillar 311 is continuously rotated, the inclined surface extrusion blocks 307 continue to move to the rear of the slide 301 under the continuous action of the applied pressure as the pillar 311 rotates.After the inclined extrusion block 307 moves to the rear of the slide 301, the support 311 can be rotated in the opposite direction to prepare for the withdrawal of the support 311. At this time, the front side of the inclined extrusion block 307 will contact the chamfered surface of the slide 301, and the slide 301 will be pushed forward, and the spring 1 303 will be stretched, and the slide 301 will be driven forward until the slide 301 is moved to contact the rear side of the conical block 305. Two inclined surfaces are formed between the two, and by continuously rotating the support 311, the support 311 moves along the center of the internal threaded hole 9 to The front movement ensures that the slide 301 and the rear side of the conical block 305 can be properly contacted, so that the front side of the four inclined extrusion blocks 307 are in contact with the chamfered surface of the slide 301, and the inclined extrusion blocks 307 are squeezed to provide avoidance, thereby driving the support 311 to separate from the socket 6, thereby continuously rotating the support 311 and separating from the internal threaded hole 9, and the current limiting protector can be quickly disassembled, which is helpful for regular maintenance and timely replacement of the components inside the current limiting protector, thereby extending the life of the current limiting protector and improving the reliability and flexibility of the current limiting protector.

[0032] It is worth noting that the specific model of the single-chip microcomputer 8 disclosed in the above embodiment is S7-200, the display 4 can select HKS-AC-V01, the comparator 7 is recommended to select AD8564ARZ, the current sensor 9 can select RDP-SC04, the trigger 10 is preferably CD4027, and the single-chip microcomputer 8 controls the display 4, comparator 7, current sensor 9 and trigger 10 to work using methods commonly used in the prior art.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A self-resetting current limiting protector, characterized in that: It comprises a first shell (1), a second shell (2) and a fixing mechanism (3); Shell 1 (1): The four corners of the front side of the shell are respectively provided with plug holes (6), and the bottom wall of the shell 1 (1) is provided with a current sensor (7); Shell 2 (2): The four corners of the front side of the shell are respectively provided with internal thread holes (9), and the internal thread holes (9) correspond to the front and rear positions of the insertion holes (6) one by one; Fixing mechanisms (3): four fixing mechanisms (3) are provided respectively between the internal threaded holes (9) and the longitudinally adjacent insertion holes (6); Wherein: it also includes a single chip microcomputer (8), the single chip microcomputer (8) being arranged in the middle of the bottom wall of the housing 1 (1), and the single chip microcomputer (8) being bidirectionally electrically connected to the current sensor (7); The fixing mechanism (3) comprises a mounting plate (302) and a support (311), the external threads on the outer surface of the support (311) are connected to the internal threads of the longitudinally adjacent internal threaded holes (9), the rear ends of the support (311) extend into the interior of the insertion hole (6), and the front ends of the support (311) are fixedly connected to the mounting plate (302); The fixing mechanism (3) further comprises a support rod (304), a conical block (305), an avoidance opening (306), an inclined surface extrusion block (307), a second spring (308), a sliding column (309) and a sliding hole (310), wherein the avoidance opening (306) is provided at the rear end of the support column (311), the inner wall of the avoidance opening (306) is provided with evenly distributed sliding holes (310), the inner wall of the sliding hole (310) is slidably connected to a sliding column (309), and one end of the sliding column (309) close to the center of the avoidance opening (306) is fixedly connected to the inclined surface extrusion block (309). 7) A second spring (308) is fixedly connected between the side of the inclined surface extrusion block (307) located in the same avoidance opening (306) away from the center of the avoidance opening (306) and the inner wall of the adjacent avoidance opening (306), and the second spring (308) is sleeved on the outer surface of the sliding column (309). The support rod (304) is fixedly connected to the rear inner wall of the socket (6), and the front end of the support rod (304) is fixedly connected to a conical block (305), and the inclined surface of the conical block (305) is matched with the inclined surfaces of the four longitudinally adjacent inclined surface extrusion blocks (307); The fixing mechanism (3) further comprises a slide (301) and a spring (303), wherein the slide (301) is slidably connected to the middle portion of the support rod (304), a chamfered structure is provided at the rear end of the slide (301), a spring (303) is fixedly connected between the rear side surface of the slide (301) and the rear inner wall of the insertion hole (6), and the spring (303) is sleeved on the outer surface of the support rod (304).

2. A self-resetting current limiting protector according to claim 1, characterized in that: The four corners of the rear side surface of the housing 1 (1) are respectively provided with mounting holes (5).

3. A self-resetting current limiting protector according to claim 1, characterized in that: It also includes a display (4), which is arranged on the front side of the second housing (2), and the input end of the display (4) is the output end of the single-chip microcomputer (8).

4. A self-resetting current limiting protector according to claim 1, characterized in that: The fixing mechanism (3) further comprises a nut (312), and the nut (312) is threadedly connected to the front end of the support column (311).

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