CN219832541U - Circuit breaker with overload protection mechanism - Google Patents

Abstract

The utility model relates to a circuit breaker with an overload protection mechanism, which belongs to the technical field of electrical protection. It includes a circuit breaker main body. The inner side wall of the circuit breaker main body is provided with a first connecting block and a second connecting block. The end of the first connecting block is fixed. A first U-shaped connecting block is provided, and a second U-shaped connecting block is fixed at the end of the second connecting block. A torsion spring is installed inside the first U-shaped connecting block, and a third connecting block is installed outside the torsion spring. A first fixed block is fixed on the top of the block, and a first ring buckle is fixed on the top of the first fixed block. An aluminum wire is tied to the first ring buckle. A contact post is installed on the inside of the second U-shaped connecting block. The end face is fixed with a second fixing block, the bottom end of the second fixing block is fixed with a second ring buckle, and the aluminum wire passes through the second ring buckle and is bound to the contact column. By providing the second ring buckle, the utility model is beneficial to protecting the third connection block from being damaged during short circuit.

Description

A circuit breaker with an overload protection mechanism

Technical field

The utility model relates to a circuit breaker with an overload protection mechanism, belonging to the technical field of electrical appliance protection.

Background technique

A circuit breaker refers to a switching device that can close, carry, and break current under normal circuit conditions and can close, carry, and break current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their application range. The boundary between high and low voltage is relatively vague. Generally, those above 3kV are called high-voltage electrical appliances.

The circuit breaker can be used to connect and disconnect the load circuit. The main contact of the circuit breaker is closed manually or electrically. After the main contact is closed, the free tripping mechanism locks the main contact in the closing position. When a short circuit occurs in the circuit, the circuit breaker will cut off the faulty circuit in time to prevent the accident from expanding and ensure safe operation.

When using a circuit breaker, the circuit breaker will protect the circuit after a short circuit. However, after the short circuit, although the circuit breaker cuts off the faulty circuit, the metal pieces inside the circuit breaker will be damaged due to the short circuit.

The Chinese utility model patent with application number CN201320422807.5 discloses a circuit breaker with an overload protection mechanism. The key points of its technical solution are: the tripping device includes a circuit module, an excitation coil, an elastic mechanism, and a sliding mechanism. The operating mechanism includes a detection switch. and the main switch. The circuit module is electrically connected to the excitation coil and conductor structure, and integrates the detection switch, the main switch and the LED indicator light. The sliding mechanism includes a sliding rail, a magnetophilic sliding block that can slide along the sliding rail, and a sliding block that is linked with the sliding block. The contact piece and the conductor structure include an input section and an output section separated by a sliding block. One end of the opposite sliding block is provided with a contact point for contact with the contact piece. The sliding block is connected to the excitation coil through an elastic mechanism. The circuit module receives the detection signal to control the magnetic force of the excitation coil to control the displacement of the sliding block, so that the linked contact piece and the contact point are engaged, and the generated electrical signal is fed back to the circuit module, and the LED displays whether the circuit breaker is normal. The utility model is suitable for electric power equipment that requires a circuit breaker with a self-detection function, but does not have a metal sheet protection function.

Utility model content

The purpose of this utility model is to provide a circuit breaker with an overload protection mechanism in order to solve the technical problem of not having an overload protection function in the above-mentioned background technology.

The utility model is realized through the following technical solutions:

That is, a circuit breaker with an overload protection mechanism, including a circuit breaker main body, a first connecting block and a second connecting block are provided on the inner side wall of the circuit breaker main body, and a first U-shaped connecting block is fixedly provided at the end of the first connecting block, A second U-shaped connecting block is fixed at the end of the second connecting block, a torsion spring is installed inside the first U-shaped connecting block, a third connecting block is installed outside the torsion spring, and a first fixed block is fixed at the top of the third connecting block. , a first ring buckle is fixed on the top of the first fixed block, an aluminum wire is tied to the first ring buckle, a contact post is installed on the inside of the second U-shaped connecting block, and a second fixed block is fixed on the upper end surface of the main body of the circuit breaker. A second ring buckle is fixed at the bottom end of the second fixed block, and the aluminum wire passes through the second ring buckle and is bound to the contact post.

The utility model is provided with a second ring buckle, which is conducive to protecting the third connecting block from being damaged during a short circuit. After the circuit breaker is used, if a short circuit occurs in the predetermined circuit breaker, the aluminum wire in the main body of the circuit breaker will be damaged due to the short circuit. When the aluminum wire is fused, one end of the aluminum wire is connected to the outside of the contact post, and the other end of the aluminum wire is connected to the hole opened on the top of the first ring buckle. When the aluminum wire is fused, the first ring buckle loses the tension of the aluminum wire, and the torsion spring This will keep the third connection block away from the contact post, thereby protecting the third connection block.

A further improvement of the present invention is that a detachable packaging cover is installed on one side of the main body of the circuit breaker. The sealing cover protects the internal components of the circuit breaker body and facilitates maintenance.

A further improvement of the present invention is that the packaging cover is provided with several sound-transmitting holes.

A further improvement of the present invention is that an insulating block is fixed on the lower end surface inside the main body of the circuit breaker. Further improve the protection effect of the third connection block.

A further improvement of the present invention is that the insulating block is located directly below the end of the third connecting block.

A further improvement of the utility model is that an alarm, a spring, and a button fixing block are installed at the bottom of the inner cavity of the circuit breaker body, an iron block is installed at the top of the spring, a push rod is installed at the bottom of the iron block, and a push rod is installed at the top of the button fixing block. There is an alarm button, which is electrically connected to the alarm, and an electromagnet is fixed at the bottom of the second U-shaped connecting block. The utility model is provided with an alarm, which is conducive to issuing an alarm when a short circuit occurs so that the user can detect it in time. When the short circuit does not occur in the circuit breaker, the electromagnet installed at the bottom of the second U-shaped connecting block will generate magnetic force, thereby attracting the iron block, so that the The push rod installed at the bottom of the iron block is away from the alarm button. When the circuit breaker is short-circuited, the electromagnet loses its magnetic force, and the iron block loses the magnetic attraction of the electromagnet. The spring installed at the bottom of the iron block will pull back the iron block, causing the iron block to pull back. A push lever at the bottom of the block presses the alarm button, causing the siren to sound an alarm.

A further improvement of the utility model is that the electromagnet is located directly above the iron block.

A further improvement of the utility model is that the push rod, button fixing block and alarm button are located in the spring.

Compared with the existing technology, the beneficial effects of this utility model are:

The utility model is provided with a second ring buckle, which is conducive to protecting the third connecting block from being damaged during a short circuit. After the circuit breaker is used, if a short circuit occurs in the predetermined circuit breaker, the aluminum wire in the main body of the circuit breaker will be damaged due to the short circuit. When the aluminum wire is fused, one end of the aluminum wire is connected to the outside of the contact post, and the other end of the aluminum wire is connected to the hole opened on the top of the first ring buckle. When the aluminum wire is fused, the first ring buckle loses the tension of the aluminum wire, and the torsion spring This will keep the third connection block away from the contact post, thereby protecting the third connection block.

Description of the drawings

In order to explain the technical solution of the present invention more clearly, the drawings required for the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those in the field, Ordinary technicians can also obtain other drawings based on these drawings without exerting creative work.

Figure 1 is a schematic diagram of the overall structure of a specific embodiment of the present invention.

Figure 2 is a schematic diagram of the internal structure from a first perspective of a specific embodiment of the present invention.

Figure 3 is a schematic diagram of the internal structure from a second perspective of the specific embodiment of the present invention.

Figure 4 is a partial enlarged structural diagram of position A in Figure 3.

Figure 5 is a schematic structural diagram of a packaging cover according to a specific embodiment of the present invention.

In the picture: 1. Main body of circuit breaker; 101. Second fixed block; 102. Second ring buckle; 103. Alarm; 104. Spring; 105. Iron block; 106. Push rod; 107. Button fixed block; 108. Alarm button; 109. Insulating block; 2. Packaging cover; 201. Sound-transmitting hole; 3. First connecting block; 4. First U-shaped connecting block; 401. Torsion spring; 402. Third connecting block; 403. A fixed block; 404, the first ring buckle; 5, the second connecting block; 6, the second U-shaped connecting block; 601, contact post; 602, aluminum wire; 603, electromagnet.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Example 1:

As shown in Figures 1 to 5, a circuit breaker with an overload protection mechanism includes a circuit breaker body 1. The internal side wall of the circuit breaker body 1 is provided with a first connection block 3 and a second connection block 5. The first connection block The first U-shaped connecting block 4 is fixed at the end of 3, and the second U-shaped connecting block 6 is fixed at the end of the second connecting block 5. A torsion spring 401 is installed on the inside of the first U-shaped connecting block 4, and the torsion spring 401 is installed on the outside. A third connecting block 402 is installed. A first fixing block 403 is fixed on the top of the third connecting block 402. A first ring buckle 404 is fixed on the top of the first fixed block 403. An aluminum wire 602 is tied to the first ring buckle 404. , the contact post 601 is installed inside the second U-shaped connecting block 6, the second fixing block 101 is fixed on the upper end surface of the circuit breaker body 1, the second ring buckle 102 is fixed on the bottom of the second fixing block 101, and the aluminum wire 602 passes through It is bound to the contact post 601 through the second buckle 102 .

Example 2:

As shown in Figures 1 to 5, a circuit breaker with an overload protection mechanism includes a circuit breaker body 1. The internal side wall of the circuit breaker body 1 is provided with a first connection block 3 and a second connection block 5. The first connection block The first U-shaped connecting block 4 is fixed at the end of 3, and the second U-shaped connecting block 6 is fixed at the end of the second connecting block 5. A torsion spring 401 is installed on the inside of the first U-shaped connecting block 4, and the torsion spring 401 is installed on the outside. A third connecting block 402 is installed. A first fixing block 403 is fixed on the top of the third connecting block 402. A first ring buckle 404 is fixed on the top of the first fixed block 403. An aluminum wire 602 is tied to the first ring buckle 404. , the contact post 601 is installed inside the second U-shaped connecting block 6, the second fixing block 101 is fixed on the upper end surface of the circuit breaker body 1, the second ring buckle 102 is fixed on the bottom of the second fixing block 101, and the aluminum wire 602 passes through It is bound to the contact post 601 through the second buckle 102 .

A detachable packaging cover 2 is installed on one side of the circuit breaker body 1, and a plurality of sound-transmitting holes 201 are provided in the packaging cover 2.

An insulating block 109 is fixed on the inner lower end surface of the circuit breaker body 1 , and the insulating block 109 is located directly below the end of the third connecting block 402 .

Embodiment three:

As shown in Figures 1 to 5, a circuit breaker with an overload protection mechanism includes a circuit breaker body 1. The internal side wall of the circuit breaker body 1 is provided with a first connection block 3 and a second connection block 5. The first connection block The first U-shaped connecting block 4 is fixed at the end of 3, and the second U-shaped connecting block 6 is fixed at the end of the second connecting block 5. A torsion spring 401 is installed on the inside of the first U-shaped connecting block 4, and the torsion spring 401 is installed on the outside. A third connecting block 402 is installed. A first fixing block 403 is fixed on the top of the third connecting block 402. A first ring buckle 404 is fixed on the top of the first fixed block 403. An aluminum wire 602 is tied to the first ring buckle 404. , the contact post 601 is installed inside the second U-shaped connecting block 6, the second fixing block 101 is fixed on the upper end surface of the circuit breaker body 1, the second ring buckle 102 is fixed on the bottom of the second fixing block 101, and the aluminum wire 602 passes through It is bound to the contact post 601 through the second buckle 102 .

A detachable packaging cover 2 is installed on one side of the circuit breaker body 1, and a plurality of sound-transmitting holes 201 are provided in the packaging cover 2.

An insulating block 109 is fixed on the inner lower end surface of the circuit breaker body 1 , and the insulating block 109 is located directly below the end of the third connecting block 402 .

An alarm 103, a spring 104, and a button fixing block 107 are installed at the bottom of the inner cavity of the circuit breaker body 1. An iron block 105 is installed at the top of the spring 104, a push rod 106 is installed at the bottom of the iron block 105, and the button fixing block 107 is installed at the top. There is an alarm button 108, which is electrically connected to the alarm 103, and an electromagnet 603 is fixed at the bottom of the second U-shaped connecting block 6.

The electromagnet 603 is located directly above the iron block 105 .

The push rod 106, the button fixing block 107, and the alarm button 108 are located in the spring 104.

working principle:

The utility model is provided with a second ring buckle, which is conducive to protecting the third connecting block from being damaged during a short circuit. After the circuit breaker is used, if a short circuit occurs in the predetermined circuit breaker, the aluminum wire in the main body of the circuit breaker will be damaged due to the short circuit. When the aluminum wire is fused, one end of the aluminum wire is connected to the outside of the contact post, and the other end of the aluminum wire is connected to the hole opened on the top of the first ring buckle. When the aluminum wire is fused, the first ring buckle loses the tension of the aluminum wire, and the torsion spring This will keep the third connection block away from the contact post, thereby protecting the third connection block.

The utility model is provided with an alarm, which is conducive to issuing an alarm when a short circuit occurs so that the user can detect it in time. When the short circuit does not occur in the circuit breaker, the electromagnet installed at the bottom of the second U-shaped connecting block will generate magnetic force, thereby attracting the iron block, so that the The push rod installed at the bottom of the iron block is away from the alarm button. When the circuit breaker is short-circuited, the electromagnet loses its magnetic force, and the iron block loses the magnetic attraction of the electromagnet. The spring installed at the bottom of the iron block will pull back the iron block, causing the iron block to pull back. A push lever at the bottom of the block presses the alarm button, causing the siren to sound an alarm.

Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

The terms "upper", "lower", "outside", "inside", etc. in the description and claims of the present invention and the above-mentioned drawings, if present, are used to distinguish the relative relationship in position, and do not need to be qualitative. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A circuit breaker with an overload protection mechanism, including a circuit breaker body (1), characterized in that the inner side wall of the circuit breaker body (1) is provided with a first connection block (3) and a second connection block (5) , the first U-shaped connection block (4) is fixed at the end of the first connection block (3), the second U-shaped connection block (6) is fixed at the end of the second connection block (5), the first U-shaped connection A torsion spring (401) is installed on the inside of the block (4), a third connecting block (402) is installed on the outside of the torsion spring (401), and a first fixed block (403) is fixed on the top of the third connecting block (402). A first ring buckle (404) is fixed on the top of the fixed block (403). An aluminum wire (602) is tied to the first ring buckle (404). A contact post (601) is installed on the inside of the second U-shaped connecting block (6). , a second fixing block (101) is fixed on the upper end surface of the circuit breaker body (1), a second ring buckle (102) is fixed on the bottom of the second fixing block (101), and the aluminum wire (602) passes through the second fixing block (101). The ring buckle (102) is tied to the contact post (601). 2. A circuit breaker with an overload protection mechanism according to claim 1, characterized in that a detachable packaging cover (2) is installed on one side of the circuit breaker body (1). 3. A circuit breaker with an overload protection mechanism according to claim 2, characterized in that a plurality of sound-transmitting holes (201) are provided in the packaging cover (2). 4. A circuit breaker with an overload protection mechanism according to claim 1, characterized in that an insulating block (109) is fixed on the inner lower end surface of the circuit breaker body (1). 5. A circuit breaker with an overload protection mechanism according to claim 4, characterized in that the insulating block (109) is located directly below the end of the third connecting block (402). 6. A circuit breaker with an overload protection mechanism according to claim 1, characterized in that an alarm (103), a spring (104), and a button fixing block (103) are installed at the bottom of the inner cavity of the circuit breaker body (1). 107), an iron block (105) is installed on the top of the spring (104), a push rod (106) is installed on the bottom of the iron block (105), an alarm button (108) is installed on the top of the button fixing block (107), and the alarm button (108) is electrically connected to the alarm (103), and an electromagnet (603) is fixed at the bottom of the second U-shaped connecting block (6). 7. A circuit breaker with an overload protection mechanism according to claim 6, characterized in that the electromagnet (603) is located directly above the iron block (105). 8. A circuit breaker with an overload protection mechanism according to claim 6, characterized in that the push rod (106), button fixing block (107), and alarm button (108) are located in the spring (104).