Operating mechanism of circuit breaker

Abstract

The utility model relates to an operating mechanism of a circuit breaker. Comprising a mechanism frame, a lever, a handle arranged on the lever, a lower connecting rod rotationally arranged on a rotating shaft, a connecting rod shaft arranged at one end of the lower connecting rod, an upper connecting rod rotationally arranged on the connecting rod shaft, a tension spring arranged between the connecting rod shaft and the lever, a jump pin rotationally arranged on the mechanism frame, and a lock catch rotationally arranged on the mechanism frame and matched with the jump pin. The re-buckle is rotatably arranged on the mechanism frame and is matched with the jump buckle, one side of the jump buckle is provided with a force bearing plane matched with the connecting rod shaft, the connecting rod shaft abuts against the force bearing plane to form linkage matching of the jump buckle and the connecting rod shaft, the upper connecting rod is provided with a buckling groove matched with the jump buckle, and the upper connecting rod abuts against the buckling groove. The jump pin is provided with a locking block which is buckled with the buckling groove. The tripping mechanism has the advantages of simple structure, stable and reliable performance, sensitive tripping action and high reliability.

Description

Technical Field

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

[0002] A circuit breaker is a switching device that can close, carry and interrupt the current under normal circuit conditions, and can close, carry and interrupt the current under abnormal circuit conditions within a specified time. The circuit breaker has overload, short circuit and undervoltage protection functions, which can protect the line and power equipment from damage. At the same time, it can also provide protection against fire hazards that may be caused by long-term grounding faults that cannot be detected by overcurrent protection. The circuit breaker includes a base, an upper cover, an operating mechanism, a moving contact, a static contact, and an arc extinguishing system. The structural design of the existing operating mechanism is relatively complex, resulting in a slow opening and closing speed of the circuit breaker. The operating mechanism of the circuit breaker also has the defects of insensitive tripping action, slow tripping speed, and low working reliability. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide an operating mechanism for a circuit breaker with simple structure, stable and reliable performance, sensitive tripping action and high reliability.

[0004] To achieve the above-mentioned purpose, the utility model adopts an operating mechanism of a circuit breaker, including a mechanism frame arranged in a base, a lever rotatably arranged on the mechanism frame, a handle arranged on the lever, a lower connecting rod rotatably arranged on a rotating shaft, a connecting rod shaft arranged on one end of the lower connecting rod, an upper connecting rod rotatably arranged on the connecting rod shaft, a tension spring arranged between the connecting rod shaft and the lever, a jump buckle rotatably arranged on the mechanism frame, a lock buckle rotatably arranged on the mechanism frame and matched with the jump buckle, and a re-lock rotatably arranged on the mechanism frame and matched with the jump buckle, a load-bearing plane matched with the connecting rod shaft is arranged on one side of the jump buckle, the connecting rod shaft abuts against the load-bearing plane, and constitutes a linkage match between the jump buckle and the connecting rod shaft, a buckling groove matched with the jump buckle is arranged on the upper connecting rod, and a locking block buckled with the buckling groove is arranged on the jump buckle.

[0005] The beneficial effects of the above structure are: the operating mechanism adopts a connecting rod type structural design, the structural design is simpler, the opening and closing speed is faster, and the working reliability is higher. When closing the circuit breaker, the connecting rod shaft moves with the upper connecting rod and the lower connecting rod and contacts the load-bearing plane of the trip button. The connecting rod shaft drives the trip button to move, and the trip button is engaged with the upper connecting rod to achieve rapid closing of the operating mechanism; when a line fault occurs, the thermal magnetic tripping mechanism of the circuit breaker drives the re-tripping action, and the re-tripping and the trip button are unlocked, thereby achieving rapid tripping and opening of the operating mechanism. Therefore, the operating mechanism of the circuit breaker has the advantages of simple structure, stable and reliable performance, sensitive tripping action, and high reliability.

[0006] In particular, the re-latching end has a limiting arm that cooperates with the jumping latch. A locking groove that cooperates with the re-latching is provided on the jumping latch. The limiting arm is latched in the locking groove, forming a limiting fit between the jumping latch and the re-latching. The re-latching is latched in the locking groove of the jumping latch through the limiting arm, which can ensure the reliable locking of the re-latching and the jumping latch, thus facilitating the improvement of the working reliability of the operating mechanism.

[0007] In particular, a positioning shaft is provided on the mechanism frame corresponding to the jumping latch. A positioning hole that cooperates with the positioning shaft is provided on the jumping latch. The positioning shaft is inserted into the positioning hole, forming a rotational connection fit between the jumping latch and the positioning shaft. The jumping latch is rotatably arranged on the positioning shaft, which facilitates the assembly of the jumping latch and the mechanism frame and can ensure the reliable operation of the jumping latch.

[0008] In particular, positioning grooves are respectively provided at both ends of the positioning shaft inside the base. Both ends of the positioning shaft are clamped in the positioning grooves, forming a limiting fit between the limiting shaft and the base. The positioning shaft is clamped in the positioning grooves of the base, which facilitates the assembly of the operating mechanism and the base and improves the assembly efficiency.

[0009] In particular, two positioning arms are provided on both sides of the mechanism frame. Two arc-shaped positioning grooves that cooperate with the two positioning arms are provided on both sides of the lever. The two positioning arms are inserted into the two arc-shaped positioning grooves, forming a rotational connection fit between the lever and the two positioning arms. The lever is clamped on the two positioning arms through the arc-shaped positioning grooves, which facilitates the assembly of the lever and the mechanism frame and can ensure the reliable operation of the lever on the mechanism frame, contributing to the improvement of the working reliability of the operating mechanism.

[0010] In particular, anti-disengagement limiting blocks that limit the lever are respectively provided at the tails of the two positioning arms. The anti-disengagement limiting blocks play a role in limiting the lever, ensuring a more compact connection between the lever and the two positioning arms. Description of the Drawings

[0011] Figure 1 It is a schematic internal structure diagram of the circuit breaker according to the embodiment of the present invention.

[0012] Figure 2 It is a perspective view of the embodiment of the present invention.

[0013] Figure 3 It is a cross-sectional view of the embodiment of the present invention.

[0014] Figure 4 It is a schematic internal structure diagram of the embodiment of the present invention. Detailed Embodiment

[0015] Such as Figures 1 to 4As shown in the figure, an embodiment of the utility model is an operating mechanism of a circuit breaker, which includes a mechanism frame 10 arranged in a base 100, a lever 11 rotatably arranged on the mechanism frame 10, a handle 12 arranged on the lever 11, a lower connecting rod 14 rotatably arranged on a rotating shaft 13, a connecting rod shaft 15 arranged at one end of the lower connecting rod 14, an upper connecting rod 16 rotatably arranged on the connecting rod shaft 15, a tension spring 17 arranged between the connecting rod shaft 15 and the lever 11, a tripping latch 18 rotatably arranged on the mechanism frame 10, a locking latch 19 rotatably arranged on the mechanism frame 10 and cooperating with the tripping latch 18, and a reclosing latch 20 rotatably arranged on the mechanism frame 10 and cooperating with the tripping latch 18. A bearing plane 181 cooperating with the connecting rod shaft 15 is arranged on one side of the tripping latch 18. The connecting rod shaft 15 abuts against the bearing plane 181, and a linkage cooperation between the tripping latch 18 and the connecting rod shaft 15 is formed. A latching groove 161 cooperating with the tripping latch 18 is arranged on the upper connecting rod 16, and a locking block 182 cooperating with the latching groove 161 is arranged on the tripping latch 18. One end of the reclosing latch 20 has a limiting arm 201 cooperating with the tripping latch 18, a locking groove 183 cooperating with the reclosing latch 20 is arranged on the tripping latch 18, and the limiting arm 201 is latched in the locking groove 183, and a limiting cooperation between the tripping latch 18 and the reclosing latch 20 is formed. The reclosing latch is latched in the locking groove of the tripping latch through the limiting arm, so as to ensure reliable locking between the reclosing latch and the tripping latch, which is beneficial to improving the working reliability of the operating mechanism.

[0016] As Figure 1 , 2As shown, a positioning shaft 101 is provided at the corresponding jump buckle 18 on the mechanism frame 10, and a positioning hole matched with the positioning shaft 101 is provided on the jump buckle 18. The positioning shaft 101 is inserted in the positioning hole, and constitutes a rotational connection and cooperation between the jump buckle 18 and the positioning shaft 101. The jump buckle is rotatably arranged on the positioning shaft, so as to facilitate the assembly of the jump buckle and the mechanism frame, and ensure that the jump buckle can operate reliably. Positioning grooves 1001 are respectively provided at the two ends of the corresponding positioning shaft 101 in the base 100, and the two ends of the positioning shaft 101 are engaged in the positioning groove 1001, and constitute the limiting cooperation between the limiting shaft 101 and the base 10. The positioning shaft is engaged in the positioning groove of the base, so as to facilitate the assembly of the operating mechanism and the base, and the assembly efficiency is higher. Two positioning arms 102 are arranged on both sides of the mechanism frame 10, and two arc-shaped positioning grooves 111 cooperating with the two positioning arms 102 are arranged on both sides of the lever 11. The two positioning arms 102 are inserted into the two arc-shaped positioning grooves 111, and constitute the rotational connection and cooperation between the lever 11 and the two positioning arms 102. The lever is engaged with the two positioning arms through the arc-shaped positioning grooves, so as to facilitate the assembly of the lever and the mechanism frame, and ensure that the lever can reliably operate on the mechanism frame, which is conducive to improving the working reliability of the operating mechanism. The tails of the two positioning arms 102 are respectively provided with anti-slip limit blocks 103 cooperating with the lever 11. The anti-slip limit blocks play a role in limiting the lever, so as to ensure that the connection between the lever and the two positioning arms is more compact.

[0017] The operating mechanism adopts a connecting rod type structure design, which has a simpler structure design, faster opening and closing speed, and higher working reliability. When closing the circuit breaker, the connecting rod shaft moves with the upper connecting rod and the lower connecting rod and contacts the load-bearing plane of the trip button. The connecting rod shaft drives the trip button to move, and the trip button is engaged with the upper connecting rod to achieve rapid closing of the operating mechanism; when a line fault occurs, the thermal magnetic tripping mechanism of the circuit breaker drives the re-tripping action, and the re-tripping and the trip button are unlocked, thereby achieving rapid tripping and opening of the operating mechanism. Therefore, the operating mechanism of the circuit breaker has the advantages of simple structure, stable and reliable performance, sensitive tripping action, and high reliability.

Claims

1. An operating mechanism for a circuit breaker, characterized in that: It includes a mechanism frame arranged inside the base, a lever rotatably arranged on the mechanism frame, a handle arranged on the lever, a lower connecting rod rotatably arranged on a rotating shaft, a connecting rod shaft arranged at one end of the lower connecting rod, an upper connecting rod rotatably arranged on the connecting rod shaft, a tension spring arranged between the connecting rod shaft and the lever, a jump buckle rotatably arranged on the mechanism frame, a lock buckle rotatably arranged on the mechanism frame and cooperating with the jump buckle, and a re-buckle rotatably arranged on the mechanism frame and cooperating with the jump buckle. A bearing plane cooperating with the connecting rod shaft is arranged on one side of the jump buckle. The connecting rod shaft abuts against the bearing plane, and a linkage cooperation between the jump buckle and the connecting rod shaft is formed. A buckling groove cooperating with the jump buckle is arranged on the upper connecting rod, and a locking block cooperating with the buckling groove is arranged on the jump buckle.

2. The operating mechanism of the circuit breaker according to claim 1, characterized in that: One end of the re-buckle has a limiting arm cooperating with the jump buckle. A locking groove cooperating with the re-buckle is arranged on the jump buckle. The limiting arm is buckled in the locking groove, and a limiting cooperation between the jump buckle and the re-buckle is formed.

3. The operating mechanism of the circuit breaker according to claim 1 or 2, characterized in that: A positioning shaft is arranged on the mechanism frame corresponding to the jump buckle. A positioning hole cooperating with the positioning shaft is arranged on the jump buckle. The positioning shaft is inserted into the positioning hole, and a rotational connection cooperation between the jump buckle and the positioning shaft is formed.

4. The operating mechanism of the circuit breaker according to claim 3, characterized in that: Positioning grooves are respectively arranged at both ends of the positioning shaft inside the base. Both ends of the positioning shaft are clamped in the positioning grooves, and a limiting cooperation between the limiting shaft and the base is formed.

5. The operating mechanism of the circuit breaker according to claim 1 or 2, characterized in that: Two positioning arms are arranged on both sides of the mechanism frame. Two arc-shaped positioning grooves cooperating with the two positioning arms are arranged on both sides of the lever. The two positioning arms are inserted into the two arc-shaped positioning grooves, and a rotational connection cooperation between the lever and the two positioning arms is formed.

6. The operating mechanism of the circuit breaker according to claim 5, characterized in that: Anti-detachment limiting blocks cooperating with the lever are respectively arranged at the tails of the two positioning arms.

Images