Circuit breaker overload protection structure

Abstract

The utility model discloses a circuit breaker overload protection structure which comprises a shell, an overload protection assembly is installed on the inner wall of the shell and comprises an L-shaped live wire conductive plate, the bottom end of the L-shaped live wire conductive plate is elastically connected with a live wire grounding iron plate, a limiting plate is arranged at the bottom end of the live wire grounding iron plate, and a guide rail is fixedly installed on the inner wall of the shell. The limiting plate is slidably connected with the inner wall of the guide rail, a magnetic core is fixedly installed on the inner wall of the bottom end of the shell, and a winding is wound on the outer wall of the magnetic core. The circuit breaker relates to the technical field of circuit breakers, the magnetic core and the winding are arranged to cooperate to generate magnetism and attract a live wire grounding iron plate, so that the live wire grounding iron plate and the L-shaped live wire current-conducting plate can be quickly disconnected; and meanwhile, the circuit breaker indicator lamp can be powered after the circuit is connected through the thermosensitive U-shaped clamping plate and the zero line outlet end, so that the indicating effect is achieved through the circuit breaker indicator lamp, and the use safety of the equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a circuit breaker overload protection structure. Background Technology

[0002] As an important device for circuit protection, the overload protection function of circuit breakers is crucial. However, the existing overload protection structure of circuit breakers is complex and uses springs in many places. After repeated use, the springs are prone to loosening and reducing their elasticity, which affects the tripping action. This may result in the circuit not being able to be cut off in time and effectively when overloaded, thus causing safety hazards and damaging electrical equipment. Utility Model Content

[0003] The purpose of this invention is to provide an overload protection structure for circuit breakers to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A circuit breaker overload protection structure includes a housing. An overload protection component is installed on the inner wall of the housing. The overload protection component includes an L-shaped live wire conductive plate. The bottom end of the L-shaped live wire conductive plate is elastically connected to a live wire ground plate. A limit plate is provided at the bottom end of the live wire ground plate. A guide rail is fixedly installed on the inner wall of the housing. The limit plate is slidably connected to the inner wall of the guide rail. A magnetic core is fixedly installed on the bottom inner wall of the housing. A winding is wound around the outer wall of the magnetic core.

[0006] In a preferred embodiment of this utility model, the limiting plate extends through the housing to the outside, and the left and right outer walls of the limiting plate are fixedly installed with locking blocks. The side wall of the guide rail is provided with a rectangular groove, and the locking blocks slide and limit the movement within the inner wall of the rectangular groove. The side wall of the housing is fixedly installed with a side plate.

[0007] In a preferred embodiment of this utility model, a live wire inlet and a neutral wire inlet are fixedly installed on the top of the housing, a live wire outlet and a neutral wire outlet are fixedly installed on the outer wall of the bottom of the housing, and a live wire inlet terminal is fixedly installed on the inner wall of the live wire inlet.

[0008] In a preferred embodiment of this utility model, a neutral wire inlet terminal is fixedly installed on the inner wall of the neutral wire inlet terminal, a live wire outlet terminal is fixedly installed on the inner wall of the live wire outlet terminal, and a neutral wire outlet terminal is fixedly installed on the inner wall of the neutral wire outlet terminal.

[0009] In a preferred embodiment of this utility model, the neutral wire outlet terminal and the neutral wire inlet terminal are connected by a wire, the neutral wire outlet terminal is connected to the negative pole of the winding, the positive pole of the winding is connected to a conductive block, and a thermal U-shaped clamp is provided on the outside of the conductive block.

[0010] In a preferred embodiment of this utility model, the thermal U-shaped clamp is a thermal metal block, the thermal U-shaped clamp is connected to the L-shaped live wire conductive plate by a wire, and the conductive block is connected to the neutral wire outlet terminal by a wire to a circuit breaker indicator light.

[0011] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0012] 1. By setting up a magnetic core and winding to generate magnetism, the live wire ground plate is attracted, so that the live wire ground plate and the L-shaped live wire conductive plate can be quickly disconnected to achieve circuit protection. At the same time, the circuit can be connected through the thermal U-shaped clamp and the neutral wire outlet to supply power to the circuit breaker indicator light, so that the circuit breaker indicator light can play an indication role, improving the safety of equipment use.

[0013] 2. By setting a limit plate, the live wire grounding plate is limited, which makes it easy to lock the live wire grounding plate in time when it is attracted to the magnetic core. This prevents the live wire grounding plate from automatically resetting and requires manual intervention to remove the limit plate to reset the live wire grounding plate, thus improving the safety of equipment use. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0015] Figure 1 This is a schematic diagram of the main structure of the overload protection structure of a circuit breaker.

[0016] Figure 2 This is a top view schematic diagram of the overload protection structure of a circuit breaker.

[0017] Figure 3 This is a schematic diagram of the internal structure of a circuit breaker overload protection structure.

[0018] Figure 4 A schematic diagram of the magnetic core structure in the overload protection structure of a circuit breaker;

[0019] Figure 5 This is a schematic diagram of the overload protection component in the overload protection structure of a circuit breaker.

[0020] In the diagram: 100 housing, 110 side plate, 120 live wire inlet, 121 inlet terminal, 130 neutral wire inlet, 131 neutral wire inlet, 140 live wire outlet, 141 live wire outlet, 150 neutral wire outlet, 151 neutral wire outlet, 160 magnetic core, 161 winding, 162 conductive block, 170 guide rail, 180 limiting plate, 181 locking block.

[0021] L-shaped live wire conductive plate 200, grounding plate 210, live wire grounding plate 220, thermal U-shaped clamp 230, circuit breaker indicator light 240. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] Example 1: Figures 1-5 The device includes a housing 100, an overload protection component installed on the inner wall of the housing 100, an L-shaped live wire conductive plate 200, a live wire ground plate 220 elastically connected to the bottom end of the L-shaped live wire conductive plate 200, a limit plate 180 provided at the bottom end of the live wire ground plate 220, a guide rail 170 fixedly installed on the inner wall of the housing 100, the limit plate 180 slidingly connected to the inner wall of the guide rail 170, a magnetic core 160 fixedly installed on the bottom inner wall of the housing 100, and a winding 161 wound around the outer wall of the magnetic core 160.

[0024] The specific application scenario of this embodiment is as follows: By setting the magnetic core 160 and winding 161 to generate magnetism, the live wire ground plate 220 is attracted, thereby enabling the live wire ground plate 220 to be quickly disconnected from the L-shaped live wire conductive plate 200, realizing circuit protection. At the same time, the circuit can be connected through the thermal U-shaped clamp 230 and the neutral wire outlet 150 to supply power to the circuit breaker indicator 240, thereby enabling the circuit breaker indicator 240 to serve as an indicator, improving the safety of equipment use. By setting the limit plate 180, the live wire ground plate 220 is limited, so that when the live wire ground plate 220 is attracted to the magnetic core 160, it can be locked in time, thereby preventing the live wire ground plate 220 from automatically resetting. It requires manual intervention to pull out the limit plate 180 to reset the live wire ground plate 220, thus improving the safety of equipment use.

[0025] Example 2: Figure 1 and Figure 2 The limiting plate 180 extends through the housing 100 to the outside. The locking blocks 181 are fixedly installed on the outer walls of the left and right sides of the limiting plate 180. The guide rail 170 has a rectangular groove 181 on its side wall. The locking blocks 181 slide and limit the movement of the rectangular groove 181 on its inner wall. The side plate 110 is fixedly installed on the side wall of the housing 100.

[0026] The specific application scenario of this embodiment is as follows: by setting the locking block 181 and the rectangular groove 181 to work together, after the live wire ground plate 220 passes over the limiting plate 180 and enters below the limiting plate 180, the limiting plate 180 can be pushed to slide, thereby adjusting the position of the end of the limiting plate 180, so that the limiting plate 180 can lock and release the live wire ground plate 220.

[0027] Example 3: As Figures 3-5 The top of the housing 100 is fixedly equipped with a live wire inlet terminal 120 and a neutral wire inlet terminal 130. The bottom outer wall of the housing 100 is fixedly equipped with a live wire outlet terminal 140 and a neutral wire outlet terminal 150. The inner wall of the live wire inlet terminal 120 is fixedly equipped with a live wire inlet terminal 121. The inner wall of the neutral wire inlet terminal 130 is fixedly equipped with a neutral wire inlet terminal 131. The inner wall of the live wire outlet terminal 140 is fixedly equipped with a live wire outlet terminal 141. The inner wall of the neutral wire outlet terminal 150 is fixedly equipped with a neutral wire outlet terminal 151. The neutral wire output terminal 151 and the neutral wire input terminal 130 are connected by a wire. The neutral wire output terminal 151 is connected to the negative terminal of the winding 161, and the positive terminal of the winding 161 is connected to the conductive block 162. A thermal U-shaped clamp 230 is provided on the outside of the conductive block 162. The thermal U-shaped clamp 230 is a thermal metal block. The thermal U-shaped clamp 230 is connected to the L-shaped live wire conductive plate 200 by a wire. The circuit breaker indicator light 240 is connected between the conductive block 162 and the neutral wire output terminal 151 by a wire.

[0028] The specific application scenario of this embodiment is as follows: When a short circuit or overload occurs, the live wire current increases and heats up, causing the thermal U-shaped clamp 230 to expand and come into contact with the conductive block 162. This connects the winding 161 to the circuit, making the winding 161 magnetic. After the winding 161 is magnetically attracted, it attracts the live wire ground plate 220 and moves downward, separating from the L-shaped live wire conductive plate 200. This controls the circuit breaker to cut off the power, and at the same time, the circuit breaker indicator light 240 is lit. The live wire ground plate 220 bends downward and deforms, causing the live wire ground plate 220 to pass under the limiting plate 180. The limiting plate 180 then engages the live wire ground plate 220, keeping the live wire ground plate 220 connected to the magnetic core 160 and the winding 161. This disconnects the neutral wire inlet terminal 121 and the live wire outlet terminal 141, achieving circuit protection.

[0029] The working principle of this utility model is as follows: Those skilled in the art will know that when using this device, the live wire is connected to the neutral wire input terminal 121, and the neutral wire is connected to the neutral wire input terminal 131. In the event of a short circuit or overload, the live wire current increases, generating heat. This causes the thermistor U-shaped clamp 230 to expand, bringing it into contact with the conductive block 162. This connects the winding 161 to the circuit, generating magnetism in the winding 161. The winding 161 then attracts the live wire grounding plate 220. The circuit breaker moves downward and disengages from the L-shaped live wire conductive plate 200, thereby controlling the circuit breaker to cut off power and illuminating the circuit breaker indicator light 240. The live wire ground plate 220 bends downward and deforms, causing the live wire ground plate 220 to pass under the limit plate 180, so that the limit plate 180 engages with the live wire ground plate 220, keeping the live wire ground plate 220 connected to the magnetic core 160 and winding 161, thus disconnecting the neutral wire inlet terminal 121 and the live wire outlet terminal 141, achieving circuit protection.

[0030] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A circuit breaker overload protection structure, comprising a housing (100), wherein an overload protection assembly is installed on the inner wall of the housing (100), characterized in that, The overload protection component includes an L-shaped live wire conductive plate (200), the bottom end of which is elastically connected to a live wire ground plate (220), the bottom end of which is provided with a limiting plate (180), a guide rail (170) is fixedly installed on the inner wall of the housing (100), the limiting plate (180) is slidably connected to the inner wall of the guide rail (170), a magnetic core (160) is fixedly installed on the inner wall of the bottom end of the housing (100), and a winding (161) is wound around the outer wall of the magnetic core (160).

2. The circuit breaker overload protection structure according to claim 1, characterized in that, The limiting plate (180) extends through the housing (100) to the outside. The limiting plate (180) has a locking block (181) fixedly installed on the outer walls of the left and right sides. The guide rail (170) has a rectangular groove (181) on its side wall. The locking block (181) slides and is limited in the inner wall of the rectangular groove (181). The housing (100) has a side plate (110) fixedly installed on its side wall.

3. The circuit breaker overload protection structure according to claim 1, characterized in that, The top of the housing (100) is fixedly installed with a live wire inlet (120) and a neutral wire inlet (130), the bottom outer wall of the housing (100) is fixedly installed with a live wire outlet (140) and a neutral wire outlet (150), and the inner wall of the live wire inlet (120) is fixedly installed with a live wire inlet terminal (121).

4. The circuit breaker overload protection structure according to claim 3, characterized in that, The neutral wire inlet terminal (131) is fixedly installed on the inner wall of the neutral wire inlet terminal (130), the live wire outlet terminal (141) is fixedly installed on the inner wall of the live wire outlet terminal (140), and the neutral wire outlet terminal (151) is fixedly installed on the inner wall of the neutral wire outlet terminal (150).

5. The circuit breaker overload protection structure according to claim 4, characterized in that, The neutral wire output terminal (151) and the neutral wire input terminal (130) are connected by a wire. The neutral wire output terminal (151) is connected to the negative pole of the winding (161). The positive pole of the winding (161) is connected to the conductive block (162). The conductive block (162) is provided with a thermal U-shaped clamp (230) on its outer side.

6. The circuit breaker overload protection structure according to claim 5, characterized in that, The thermal U-shaped clamp (230) is a thermal metal block. The thermal U-shaped clamp (230) is connected to the L-shaped live wire conductive plate (200) by a wire. The conductive block (162) is connected to the neutral wire outlet terminal (151) by a wire to the circuit breaker indicator (240).

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