CN221008882U - Leakage current module for small leakage circuit breaker - Google Patents

Abstract

The utility model relates to a leakage module of a small leakage circuit breaker, including a handle, a lock, a tripping buckle, a torsion spring, a contact frame rotatably arranged in a housing, a spring arranged between the contact frame and the housing, an N-line moving contact coordinated with the contact frame, and a leakage tripping assembly arranged in the housing and coordinated with the tripping buckle, wherein the handle is connected to the lock buckle through a connecting rod, and one end of the lock buckle is connected to the contact frame through a U-shaped connecting rod, and the leakage tripping assembly includes an electromagnetic tripper, a linkage rod slidably arranged in the housing and coordinated with the electromagnetic tripper, and a push rod rotatably arranged in the housing and coordinated with the linkage rod, wherein the push rod has a driving plane that abuts against one end of the tripping buckle, and the driving plane moves with the push rod and drives the tripping buckle to unlock the tripping buckle and the lock buckle. The utility model has the advantages of simple structure, stable and reliable performance, fast opening and closing speed, flexible operation, and sensitive tripping action.

Description

Leakage current module for small leakage circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a leakage module of a small leakage circuit breaker.

Background technique

At present, small circuit breakers, also known as miniature circuit breakers, are suitable for overload and short-circuit protection of AC 50/60Hz rated voltage 230/400V and rated current not exceeding 125A lines. They can also be used for infrequent operation conversion of lines under normal circumstances. Small circuit breakers are mainly used in various places such as industry, commerce, high-rise and residential buildings. Small leakage circuit breakers are switches that can automatically operate when the leakage current in the circuit exceeds a predetermined value, which can protect the safety of people and electrical appliances. Small leakage circuit breakers include multiple L-line circuit breaker units and N-line leakage protection modules assembled with multiple L-line circuit breaker units.

For example, the Chinese patent application number CN201710462871.9 discloses a residual current tripping mechanism and a circuit breaker, and proposes a leakage protection unit with an eccentric tripping action at an unfixed point. Although the leakage protection unit improves the tripping action process, making the tripping more labor-saving, and the function of the leakage protection unit is safe and reliable, during the tripping process, the point of action of the reset plate on the lock thrust is easily offset, so that the tripping force is easily changed, resulting in unstable tripping force and unreliable tripping performance. In addition, the structural design of the existing N-line leakage protection module is relatively complex, the separation and combination action of the leakage protection module is relatively slow, the breaking capacity is relatively weak, and the leakage tripping action is not sensitive.

Summary of the invention

The utility model aims to overcome the defects of the prior art and provide a leakage module for a small leakage circuit breaker with simple structure, stable and reliable performance, fast opening and closing speed, flexible operation and sensitive tripping action.

To achieve the above-mentioned purpose, the utility model adopts a leakage module of a small leakage circuit breaker, including a handle rotatably arranged in a shell, a lock buckle slidably arranged in the shell, a jump buckle rotatably arranged in the shell and locked with the lock buckle, a torsion spring arranged between the jump buckle and the shell, a contact frame rotatably arranged in the shell, a spring arranged between the contact frame and the shell, an N-line moving contact coordinated with the contact frame, and a leakage tripping assembly arranged in the shell and coordinated with the jump buckle. The handle is connected to the lock buckle through a connecting rod, and one end of the lock buckle is connected to the contact frame through a U-shaped connecting rod. The leakage tripping assembly includes an electromagnetic tripper, a linkage rod slidably arranged in the shell and coordinated with the electromagnetic tripper, and a push rod rotatably arranged in the shell and coordinated with the linkage rod. The push rod has a driving plane that abuts against one end of the jump buckle. The driving plane moves with the pushing rod and drives the jump buckle to move, thereby unlocking the jump buckle and the lock buckle.

The beneficial effects of the above structure are: a four-link structure design is adopted between the handle and the lock buckle, the trip buckle, and the contact frame, so as to ensure that the operating torque of the leakage module is evenly distributed, avoid the situation of over-force or too light operation, and the operation is more flexible. The lock buckle adopts a sliding structure design, the handle drives the lock buckle to slide through the connecting rod, and the lock buckle drives the N-wire moving contact frame to quickly perform the opening and closing action through the U-shaped connecting rod, so as to realize the rapid opening and closing of the circuit breaker, and the opening and closing speed of the operating mechanism is faster. When the leakage is tripped, the arc surface locking groove of the lock buckle is buckled on the trip buckle, and the electromagnetic release and the bimetallic strip can drive the trip buckle action respectively, and the trip buckle can be quickly unlocked with the lock buckle, and the tripping action is more sensitive and the reliability is higher. Thereby, the leakage module of the small circuit breaker has the advantages of simple structure, stable and reliable performance, fast opening and closing speed, flexible operation, and sensitive tripping action.

In particular, the other end of the lock buckle has an arc surface locking groove matched with the jump buckle, and one end of the jump buckle has an arc surface convex bearing surface matched with the arc surface locking groove. The arc surface locking groove rotates with the lock buckle and can be buckled on the arc surface convex bearing surface of the jump buckle, and the lock buckle and the jump buckle are locked. The jump buckle is provided with an arc surface convex bearing surface matched with the arc surface locking groove, so that the tripping action of the jump buckle and the lock buckle can be more sensitive.

In particular, the handle is provided with a shaft hole connected to the connecting rod, one end of the connecting rod is inserted into the shaft hole, the lock is provided with a driving hole matched with the connecting rod, the other end of the connecting rod has a guide rod portion passing through the guide hole of the housing and connected to the driving hole, and the guide rod portion of the connecting rod moves with the handle and reciprocates in the guide hole. The lock is slidably arranged in the housing through the connecting rod, thereby facilitating the assembly of the lock and the housing, and ensuring that the lock can reliably move in the housing, and the lock can quickly drive the N-wire moving contact frame to move, which is conducive to accelerating the opening and closing speed of the operating mechanism, and the reliability of the action is higher.

In particular, one end of the linkage rod has a guide portion that abuts against the push rod of the electromagnetic release, and a guide groove that matches the guide portion is provided in the housing, and the guide portion moves with the linkage rod and reciprocates in the guide groove. The guide portion of the linkage rod is slidably arranged in the guide groove of the housing, thereby ensuring that the linkage rod can slide reliably in the housing.

In particular, the other end of the linkage rod has a clamping hole, and the push rod is provided with a clamping column matched with the clamping hole, and the clamping column is clamped in the clamping hole to form a clamping fit between the clamping column and the push rod. The linkage rod and the push rod are connected by a clamping fit, so that the assembly of the linkage rod and the push rod is convenient, and the transmission of the linkage rod and the push rod can be ensured to be more reliable.

In particular, a rotating shaft matched with the push rod is arranged in the housing, a positioning hole matched with the rotating shaft is arranged on the push rod, the rotating shaft is inserted in the positioning hole, and a rotating connection and cooperation between the rotating shaft and the push rod is formed. The push rod is rotatably arranged on the rotating shaft in the housing, so as to facilitate the assembly of the push rod and the rotating shaft, make the assembly more convenient, and ensure that the push rod can rotate reliably in the housing.

In particular, a contact torsion spring is provided between the contact frame and the N-line moving contact, the contact torsion spring is engaged on the positioning boss of the contact frame, and the two ends of the contact torsion spring are respectively engaged in the first limiting groove and the second limiting groove of the N-line moving contact. The contact torsion spring can increase the contact pressure of the N-line moving contact, thereby ensuring that the N-line moving contact can reliably contact the N-line static contact, and the N-line moving contact and the contact frame are assembled in a snap-fit manner, which is conducive to improving the assembly efficiency of the N-line moving contact and the contact frame.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of an embodiment of the utility model.

FIG. 2 is a front view of an embodiment of the utility model.

FIG. 3 is an exploded view of an embodiment of the present utility model.

Detailed ways

As shown in Figures 1 to 3, the embodiment of the utility model is a leakage module of a small leakage circuit breaker, including a handle 11 rotatably arranged in a housing 10, a lock 12 slidably arranged in the housing 10, a trip button 13 rotatably arranged in the housing 10 and locked with the lock, a torsion spring 14 arranged between the trip button 13 and the housing 10, a contact frame 15 rotatably arranged in the housing 10, a spring 16 arranged between the contact frame 15 and the housing 10, an N-line moving contact 17 linked with the contact frame 15, and a leakage trip assembly 20 arranged in the housing 10 and matched with the trip button 13. The handle The handle 11 is connected to the lock buckle 12 through a connecting rod 18, one end of the lock buckle 12 is connected to the contact frame 15 through a U-shaped connecting rod 19, and the leakage release assembly 20 includes an electromagnetic release 21, a linkage rod 22 slidably arranged in the housing 10 and linked with the electromagnetic release 21, and a push rod 23 rotatably arranged in the housing 10 and linked with the linkage rod 22. The push rod 23 has a driving plane 231 that abuts against one end of the trip buckle 13. The driving plane 231 moves with the push rod 23 and drives the trip buckle 13 to move, thereby unlocking the trip buckle 13 and the lock buckle 12. The other end of the lock buckle 12 has an arc surface locking groove 121 matched with the jump buckle 13, and one end of the jump buckle 13 has an arc surface convex bearing surface 131 matched with the arc surface locking groove 121. The arc surface locking groove 121 rotates with the lock buckle 12 and can be buckled on the arc surface convex bearing surface 131 of the jump buckle 13, and the lock buckle 12 and the jump buckle 13 are locked. The jump buckle is provided with an arc surface convex bearing surface matched with the arc surface locking groove, so that the tripping action of the jump buckle and the lock buckle can be more sensitive. The handle 11 is provided with a shaft hole 111 connected to the connecting rod 18, one end of the connecting rod 18 is inserted into the shaft hole 111, the lock buckle 12 is provided with a driving hole 122 matched with the connecting rod 18, the other end of the connecting rod 18 has a guide rod portion 181 passing through the guide hole 101 of the housing 10 and connected to the driving hole 122, and the guide rod portion 181 of the connecting rod 18 moves with the handle 11 and reciprocates in the guide hole 101. The lock buckle is slidably arranged in the housing through the connecting rod, so as to facilitate the assembly of the lock buckle and the housing, and ensure that the lock buckle can reliably move in the housing, and the lock buckle can quickly drive the N-wire moving contact frame to move, which is conducive to accelerating the opening and closing speed of the operating mechanism, and the reliability of the action is higher.

As shown in Figs. 2 and 3, one end of the linkage rod 22 has a guide portion 211 that abuts against the push rod 211 of the electromagnetic release 21, and a guide groove 102 that matches the guide portion 211 is provided in the housing 10, and the guide portion 211 moves with the linkage rod 22 and reciprocates in the guide groove 102. The guide portion of the linkage rod is slidably arranged in the guide groove of the housing, thereby ensuring that the linkage rod can slide reliably in the housing. The other end of the linkage rod 22 has a snap-in hole 222, and the push rod 23 is provided with a snap-in column 232 that matches the snap-in hole 222, and the snap-in column 232 is snapped in the snap-in hole 222, and forms a snap-in fit between the snap-in column 232 and the push rod 23. The linkage rod and the push rod are connected in a snap-in fit manner, thereby facilitating the assembly of the linkage rod and the push rod, and ensuring that the transmission of the linkage rod and the push rod is more reliable. The housing 10 is provided with a rotating shaft 103 that matches the push rod 23. The push rod 23 is provided with a positioning hole 233 that matches the rotating shaft 103. The rotating shaft 103 is inserted into the positioning hole 233, and forms a rotational connection between the rotating shaft 103 and the push rod 23. The push rod is rotatably arranged on the rotating shaft in the housing, so as to facilitate the assembly of the push rod and the rotating shaft, and the assembly is more convenient, and it can ensure that the push rod can rotate reliably in the housing. A contact torsion spring 170 is arranged between the contact frame 15 and the N-line moving contact 17. The contact torsion spring 170 is engaged with the positioning boss 151 of the contact frame 15, and the two ends of the contact torsion spring 170 are respectively engaged in the first limiting groove 171 and the second limiting groove 172 of the N-line moving contact 17. The contact torsion spring can increase the contact pressure of the N-line moving contact, thereby ensuring that the N-line moving contact can reliably contact the N-line static contact, and the N-line moving contact and the contact frame are assembled in a snap-fit manner, which is beneficial to improving the assembly efficiency of the N-line moving contact and the contact frame.

A four-link structure design is adopted between the handle and the lock buckle, the trip buckle, and the contact frame, so as to ensure that the operating torque of the leakage module is evenly distributed, avoid the situation of excessive or too light operation, and make the operation more flexible. The lock buckle adopts a sliding structure design. The handle drives the lock buckle to slide through the connecting rod, and the lock buckle drives the N-line moving contact frame to quickly perform the opening and closing action through the U-shaped connecting rod, so as to realize the rapid opening and closing of the circuit breaker, and the opening and closing speed of the operating mechanism is faster. When the leakage is tripped, the arc locking groove of the lock buckle is buckled on the trip buckle, and the electromagnetic release and the bimetallic strip can drive the trip buckle action respectively. The trip buckle can be quickly unlocked with the lock buckle, and the tripping action is more sensitive and more reliable. Therefore, the leakage module of the small circuit breaker has the advantages of simple structure, stable and reliable performance, fast opening and closing speed, flexible operation, and sensitive tripping action.

Claims (7)

1. A leakage module of a small leakage circuit breaker, characterized in that it includes: a handle rotatably arranged in a shell, a lock buckle slidably arranged in the shell, a trip buckle rotatably arranged in the shell and locked with the lock buckle, a torsion spring arranged between the trip buckle and the shell, a contact frame rotatably arranged in the shell, a spring arranged between the contact frame and the shell, an N-line moving contact coordinated with the contact frame, and a leakage trip assembly arranged in the shell and coordinated with the trip buckle, the handle is connected to the lock buckle through a connecting rod, one end of the lock buckle is connected to the contact frame through a U-shaped connecting rod, the leakage trip assembly includes an electromagnetic tripper, a linkage rod slidably arranged in the shell and coordinated with the electromagnetic tripper, and a push rod rotatably arranged in the shell and coordinated with the linkage rod, the push rod has a driving plane that abuts against one end of the trip buckle, the driving plane moves with the pushing rod and drives the trip buckle to move, so as to unlock the trip buckle and the lock buckle. 2. The leakage module of the small leakage circuit breaker according to claim 1 is characterized in that: the other end of the lock buckle has an arcuate locking groove that matches the jump buckle, and one end of the jump buckle has an arcuate convex bearing surface that matches the arcuate locking groove, and the arcuate locking groove rotates with the lock buckle and can be buckled on the arcuate convex bearing surface of the jump buckle, thereby realizing the locking of the lock buckle and the jump buckle. 3. The leakage module of a small leakage circuit breaker according to claim 1 or 2 is characterized in that: the handle is provided with a rotating shaft hole connected to the connecting rod, one end of the connecting rod is inserted into the rotating shaft hole, the lock is provided with a driving hole matching the connecting rod, the other end of the connecting rod has a guide rod portion that passes through the guide hole of the shell and is connected to the driving hole, and the guide rod portion of the connecting rod moves with the handle and slides back and forth in the guide hole. 4. The leakage module of a small leakage circuit breaker according to claim 1 or 2 is characterized in that: one end of the linkage rod has a guide portion that abuts against the push rod of the electromagnetic release, and a guide groove matching the guide portion is provided in the shell, and the guide portion moves with the linkage rod and slides back and forth in the guide groove. 5. The leakage module of the small leakage circuit breaker according to claim 4 is characterized in that: the other end of the linkage rod has a clamping hole, the pushing rod is provided with a clamping column matched with the clamping hole, the clamping column is clamped in the clamping hole, and constitutes a clamping fit between the clamping column and the pushing rod. 6. The leakage module of a small leakage circuit breaker according to claim 1 or 2 is characterized in that: a rotating shaft matching with the push rod is arranged in the shell, a positioning hole matching with the rotating shaft is arranged on the push rod, the rotating shaft is inserted into the positioning hole, and constitutes a rotational connection between the rotating shaft and the push rod. 7. The leakage module of a small leakage circuit breaker according to claim 1 or 2 is characterized in that a contact torsion spring is arranged between the contact frame and the N-line moving contact, the contact torsion spring is clamped on the positioning boss of the contact frame, and the two ends of the contact torsion spring are respectively clamped in the first limiting groove and the second limiting groove of the N-line moving contact.