Alarm monitoring mechanism of circuit breaker

Abstract

The utility model relates to an alarm monitoring mechanism of a circuit breaker, which comprises a driving shaft which is in linkage fit with a jump pin and is rotatably arranged on a mechanism frame, an alarm trigger lever which is rotatably arranged in a base, and an alarm auxiliary contact which is arranged in an upper cover and is matched with the alarm trigger lever, the alarm trigger lever is provided with a trigger arm matched with the alarm auxiliary contact, one end of the alarm trigger lever is provided with a clamping groove, a clamping part at one end of the driving shaft is clamped in the clamping groove to form linkage matching of the alarm trigger lever and the driving shaft, the tail part of the trigger arm is provided with a cambered surface bulge part, and the cambered surface bulge part is provided with a convex part. The cambered surface protruding part acts along with the trigger arm and triggers the alarm auxiliary contact, and connection or disconnection of the alarm auxiliary contact is achieved. The utility model has the advantages of simple structure, stable and reliable performance, sensitive action and convenient assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an alarm monitoring mechanism for a circuit breaker. Background Art

[0002] Molded case circuit breakers are widely used in industry, agriculture, transportation, mining, civil construction, national defense and other departments. They play a great role in the transmission and distribution of electricity and the protection of electric motors. They are products with large usage and wide application among low-voltage electrical appliances. Molded case circuit breakers are switching devices that can close, carry and interrupt currents under normal circuit conditions, and can close, carry and interrupt currents under abnormal circuit conditions (including short-circuit conditions) within a specified time. In recent years, with the continuous development of intelligent technology, the intelligence of molded case circuit breakers has gradually become a development trend in the industry. The fault alarm monitoring mechanism on the circuit breaker realizes remote monitoring and control through the intelligent gateway, monitors the circuit status in real time, and promptly detects and handles problems. The structural design of the fault alarm monitoring mechanism of the existing circuit breaker is relatively complex, and has the defects of insensitive alarm action, cumbersome assembly, and unreliable performance. Summary of the Invention

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an alarm monitoring mechanism for a circuit breaker with a simple structure, stable and reliable performance, sensitive action and convenient assembly.

[0004] To achieve the above-mentioned purpose, the utility model adopts an alarm monitoring mechanism of a circuit breaker, comprising a drive shaft that is rotatably arranged on a mechanism frame and cooperates with a trip button, an alarm trigger lever rotatably arranged in a base, and an alarm auxiliary contact that is arranged in an upper cover and cooperates with the alarm trigger lever. The alarm trigger lever is provided with a trigger arm that cooperates with the alarm auxiliary contact. One end of the alarm trigger lever has a clamping groove. The clamping portion at one end of the drive shaft is clamped in the clamping groove, and constitutes a linkage cooperation between the alarm trigger lever and the drive shaft. The tail of the trigger arm is provided with an arc-surface protrusion. The arc-surface protrusion moves with the trigger arm and triggers the alarm auxiliary contact, thereby realizing the connection or disconnection of the alarm auxiliary contact.

[0005] The beneficial effects of the above structure are as follows: the alarm monitoring mechanism can realize the fault monitoring alarm of the circuit breaker, thereby realizing remote monitoring and control, real-time monitoring of the circuit status, and higher safety. When a fault occurs in the line, the circuit breaker trips and opens, the tripping trigger drives the drive shaft to rotate, and the drive shaft drives the alarm trigger lever to trigger the alarm auxiliary contact. The circuit board of the circuit breaker sends the fault signal of the alarm auxiliary contact to the background, thereby realizing remote monitoring and control, and real-time monitoring of the circuit status. The structural design of the alarm monitoring mechanism is simple, and the modular structure design is adopted, which can realize the modular assembly of the alarm monitoring mechanism. The trigger arm of the alarm monitoring mechanism triggers the alarm auxiliary contact through the arc-surface protrusion, which can ensure that the alarm trigger lever can reliably trigger the alarm auxiliary contact, and the working reliability is higher. Therefore, the alarm monitoring mechanism of the circuit breaker has the advantages of simple structure, stable and reliable performance, sensitive action, and convenient assembly.

[0006] In particular, one end of the alarm trigger lever has a positioning shaft portion that cooperates with the support plate of the base. A U-shaped positioning groove is provided on the support plate. The positioning shaft portion is inserted into the U-shaped positioning groove and constitutes a rotational connection between the positioning shaft portion and the base.

[0007] In particular, one end of the positioning shaft has a raised ring that mates with the support plate. This raised ring abuts against one side of the support plate, constraining the two. The alarm trigger lever, through the raised ring's restraining engagement with the support plate, prevents it from falling off the base, ensuring reliable rotation within the base and improving the operational reliability of the alarm monitoring mechanism.

[0008] Specifically, the other end of the alarm trigger lever has a pivot portion that mates with the base. A positioning slot is provided on the inner wall of the base that mates with the pivot portion. The pivot portion is inserted into the positioning slot, forming a rotational connection between the pivot portion and the base. The alarm trigger lever is rotatably disposed within the positioning slot of the base via the pivot portion, thereby ensuring reliable rotation of the alarm trigger lever within the base, thereby improving the operational reliability of the alarm monitoring mechanism.

[0009] In particular, the drive shaft is symmetrically provided with two engaging shaft portions that cooperate with the jumper, and the jumper is provided with two engaging holes that cooperate with the two engaging shaft portions. The two engaging shaft portions engage in the two engaging holes, thereby forming a linkage between the two engaging shaft portions and the jumper. The drive shaft and the jumper are connected by a snap-fit method, thereby facilitating assembly of the drive shaft and the jumper, making assembly more convenient and ensuring more reliable transmission between the drive shaft and the jumper. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is an exploded view of a circuit breaker according to an embodiment of the present invention.

[0011] Figure 2 This is a three-dimensional diagram of an embodiment of the present utility model.

[0012] Figure 3 This is a three-dimensional diagram of the alarm trigger lever according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0013] like Figures 1 to 3 As shown, an embodiment of the utility model is an alarm monitoring mechanism of a circuit breaker, comprising a drive shaft 20 rotatably arranged on a mechanism frame 11 and cooperating with a trip button 10, an alarm trigger lever 21 rotatably arranged in a base 12, and an alarm auxiliary contact 22 arranged in an upper cover 13 and cooperating with the alarm trigger lever 21. The alarm trigger lever 21 is provided with a trigger arm 211 cooperating with the alarm auxiliary contact 22, one end of the alarm trigger lever 21 has a clamping groove 210, and the clamping portion 201 at one end of the drive shaft 20 is clamped in the clamping groove 210, and constitutes a linkage cooperation between the alarm trigger lever 21 and the drive shaft 20, and the tail of the trigger arm 211 is provided with an arc-surface protrusion 2111, and the arc-surface protrusion 2111 moves with the trigger arm 211 and triggers the alarm auxiliary contact 22, thereby realizing the connection or disconnection of the alarm auxiliary contact 22.

[0014] like Figure 1 、 3 As shown, the alarm trigger lever 21 has a positioning shaft portion 212 at one end that cooperates with the support plate 121 of the base 12. The support plate 121 is provided with a U-shaped positioning groove 1211. The positioning shaft portion 212 is inserted into the U-shaped positioning groove 1211, forming a rotational connection between the positioning shaft portion 212 and the base 10. The positioning shaft portion 212 has a raised ring 2121 at one end that cooperates with the support plate 121. The raised ring 2121 contacts one side of the support plate 121 and forms a limited engagement between the raised ring 2121 and the support plate 121. The alarm trigger lever is limited by the raised ring and the support plate, preventing the alarm trigger lever from falling off the base, thereby ensuring that the alarm trigger lever can rotate reliably within the base, which is beneficial to improving the operating reliability of the alarm monitoring mechanism. The other end of the alarm trigger lever 21 has a rotating shaft portion 213 that cooperates with the base 12. The inner wall of the base 12 is provided with a positioning groove 122 that cooperates with the rotating shaft portion 213. The rotating shaft portion 213 is inserted into the positioning groove 122, forming a rotational connection between the rotating shaft portion 213 and the base 12. The alarm trigger lever is rotatably disposed in the positioning groove of the base via the rotating shaft portion, thereby ensuring that the alarm trigger lever can rotate reliably within the base, thereby improving the operating reliability of the alarm monitoring mechanism.

[0015] like Figure 2As shown, the drive shaft 20 is symmetrically provided with two clamping shaft portions 202 that cooperate with the jump buckle 10, and the jump buckle 10 is provided with two clamping holes 101 that cooperate with the two clamping shaft portions 202. The two clamping shaft portions 202 are clamped in the two clamping holes 101, and form a linkage cooperation between the two clamping shaft portions 202 and the jump buckle 10. The drive shaft and the jump buckle are connected by a clamping cooperation method, thereby facilitating the assembly of the drive shaft and the jump buckle, making the assembly more convenient, and ensuring more reliable transmission of the drive shaft and the jump buckle.

[0016] The alarm monitoring mechanism can realize the fault monitoring alarm of the circuit breaker, thereby realizing remote monitoring and control, real-time monitoring of the circuit status, and higher safety. When a fault occurs in the line, the circuit breaker trips and opens, and the tripping drives the drive shaft to rotate. The drive shaft drives the alarm trigger lever to trigger the alarm auxiliary contact. The circuit board of the circuit breaker sends the fault signal of the alarm auxiliary contact to the background, thereby realizing remote monitoring and control, and real-time monitoring of the circuit status. The structural design of the alarm monitoring mechanism is simple, and it adopts a modular structural design, which can realize the modular assembly of the alarm monitoring mechanism. The trigger arm of the alarm monitoring mechanism triggers the alarm auxiliary contact through the arc-surface protrusion, which can ensure that the alarm trigger lever can reliably trigger the alarm auxiliary contact, and the working reliability is higher. Therefore, the alarm monitoring mechanism of the circuit breaker has the advantages of simple structure, stable and reliable performance, sensitive action, and convenient assembly.

Claims

1. An alarm monitoring mechanism for a circuit breaker, characterized in that: It includes a drive shaft that is rotatably arranged on the mechanism frame and cooperates with the jump button, an alarm trigger lever that is rotatably arranged in the base, and an alarm auxiliary contact that is arranged in the upper cover and cooperates with the alarm trigger lever. The alarm trigger lever is provided with a trigger arm that cooperates with the alarm auxiliary contact. One end of the alarm trigger lever has a clamping groove. The clamping part of one end of the drive shaft is clamped in the clamping groove, and constitutes the linkage cooperation between the alarm trigger lever and the drive shaft. The tail of the trigger arm is provided with an arc-surface protrusion. The arc-surface protrusion moves with the trigger arm and triggers the alarm auxiliary contact, thereby realizing the connection or disconnection of the alarm auxiliary contact.

2. The alarm monitoring mechanism for a circuit breaker according to claim 1, characterized in that: One end of the alarm trigger lever has a positioning shaft portion that cooperates with the support plate of the base. A U-shaped positioning groove is provided on the support plate. The positioning shaft portion is inserted into the U-shaped positioning groove and constitutes a rotational connection between the positioning shaft portion and the base.

3. The alarm monitoring mechanism for a circuit breaker according to claim 2, characterized in that: One end of the positioning shaft portion is provided with a convex ring matched with the support plate. The convex ring abuts against one side of the support plate and forms a limiting match between the convex ring and the support plate.

4. The alarm monitoring mechanism for a circuit breaker according to claim 1 or 2, characterized in that: The other end of the alarm trigger lever has a rotating shaft portion that cooperates with the base. A positioning groove that cooperates with the rotating shaft portion is provided on the inner wall of the base. The rotating shaft portion is inserted into the positioning groove and constitutes a rotating connection between the rotating shaft portion and the base.

5. The alarm monitoring mechanism for a circuit breaker according to claim 1 or 2, characterized in that: The driving shaft is symmetrically provided with two clamping shaft portions that cooperate with the jump buckle, and the jump buckle is provided with two clamping holes that cooperate with the two clamping shaft portions. The two clamping shaft portions are clamped in the two clamping holes, and constitute a linkage cooperation between the two clamping shaft portions and the jump buckle.

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