Circuit breaker operating mechanism

Abstract

The utility model relates to a circuit breaker operating mechanism, which comprises a base, a handle, a lock catch, a jump pin, an L-pole contact seat, an L-pole moving contact arranged on the L-pole contact seat, an N-pole contact seat and an N-pole moving contact arranged on the N-pole contact seat, the L-pole contact seat is provided with an arc-shaped groove for the connecting rod to move, the base is provided with a partition plate, the L-pole contact seat and the N-pole contact seat are connected through the connecting column to form a moving space, the lock catch and the jump pin are rotationally arranged in the moving space, and the jump pin is rotationally arranged on the connecting column in a sleeving mode. A first boss, a second boss and a third boss are arranged on one side, facing the L-pole contact seat, of the N-pole contact seat. By adopting the technical scheme, the circuit breaker operating mechanism provided by the utility model is reasonable in structural layout, flexible and smooth in locking action and high in tripping speed, and can effectively prevent electric arc from entering to influence locking and tripping.

Description

Technical Field

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

[0002] The existing circuit breaker includes a shell, a handle, an operating mechanism, an electromagnetic system, a lock, a trip button and an operating mechanism. The operating mechanism includes a contact mounting seat, an L-pole moving contact and an N-pole moving contact. Mounting columns are arranged on both sides of the contact mounting seat and located on the same axis. The L-pole moving contact and the N-pole moving contact are respectively movably arranged on the mounting columns on both sides of the contact mounting seat. The lock and the trip button are located between the L-pole moving contact and the N-pole moving contact.

[0003] The operating mechanism structure in the above-mentioned circuit breaker is unreasonable, and problems such as jamming and lag are prone to occur during tripping, resulting in slow tripping speed, inflexible locking action, adhesion or increased friction between the lock and the contact mounting seat, and the arc and particles generated in the circuit breaker are easy to run into the L-pole moving contact and the N-pole moving contact, causing the lock and the tripping buckle to blacken, affecting the action, and the N-pole moving contact and the L-pole moving contact are installed unreasonable. Summary of the invention

[0004] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a circuit breaker operating mechanism with reasonable structural layout, flexible and smooth locking action, fast tripping speed, and can effectively prevent arc entry from affecting the locking and tripping.

[0005] The technical solution of the utility model: a circuit breaker operating mechanism, including a base, a handle, a lock and a trip button, the handle is rotatably arranged on the base, the handle and the trip button are connected by a connecting rod, and also includes an L-pole contact seat, an L-pole moving contact arranged on the L-pole contact seat, an N-pole contact seat and an N-pole moving contact arranged on the N-pole contact seat, the L-pole contact seat is provided with an arc groove for the movement of the connecting rod, a partition is provided on the base, the L-pole moving contact and the N-pole moving contact are respectively arranged on both sides of the partition, the L-pole contact seat and the N-pole contact seat are connected to form an activity space through a connecting column, the lock and the trip button are rotatably arranged in the activity space, and the trip button is rotatably sleeved on the connecting column, and the N-pole contact seat is provided with a first boss, a second boss and a third boss on the side facing the L-pole contact seat The second boss is located on the left side of the first boss and is separated from the first boss. The middle part of the lock buckle is installed between the first boss and the second boss through a pin shaft. The upper end of the lock buckle is provided with an engaging surface that cooperates with the jump buckle to limit the rotation of the jump buckle. The fourth boss and the fifth boss are correspondingly provided on the side of the L-pole contact seat facing the N-pole contact seat. When the L-pole contact seat is connected to the N-pole contact seat, the first boss is in contact with the L-pole contact seat, the second boss is in contact with the fourth boss, the third boss and the fifth boss are located on both sides of the partition and are in contact with the partition. A trip rod is provided on the lock buckle, and the trip rod is located below the second boss and the fourth boss. When the switch is closed, the trip rod extends out of the activity space. When tripping, the lock buckle rotates under the action of the electromagnetic system, and the trip rod retracts into the activity space.

[0006] By adopting the above technical scheme, the structural layout is reasonable, the installation is convenient, the operation is stable, the lock can move flexibly between the two contact seats, and the release is rapid. When the electromagnetic system is working, the release rod is pushed to rotate the lock, and the release rod is retracted into the activity space. The position setting of each boss will not affect the movement of the lock, and it can move flexibly between the two contact seats, and the movement is smooth and unobstructed. Long grooves are provided on the L-pole contact seat and the N-pole contact seat, and the pin shaft is passed through the long grooves.

[0007] Further configuration of the utility model: a lock spring is provided between the lock and the N-pole contact seat, a first lock spring placement groove is provided on the lower end surface of the first boss, a second lock spring placement groove is provided on the lock, and both ends of the lock spring are respectively located in the corresponding lock spring placement grooves.

[0008] With the above further arrangement, the lock spring has a stable structure, is not easily damaged, and can better exert a reset force on the lock.

[0009] The utility model is further configured as follows: the electromagnetic system includes a moving iron core and a push rod that slides synchronously with the moving iron core, a sixth boss is provided on the N-pole contact seat below the second boss, a seventh boss is provided on the L-pole contact seat below the fourth boss, the sixth boss is separated from the seventh boss, the trip rod is located between the sixth boss and the seventh boss, the sixth boss and the outer side surface of the second boss are integrally formed to form a first arc surface, the seventh boss and the outer side surface of the fourth boss are integrally formed to form a second arc surface, and when the trip rod is retracted, the end of the push rod is arranged to abut against the two arc surfaces.

[0010] With the above-mentioned further arrangement, the second boss protrudes from the sixth boss, and the fourth boss protrudes from the seventh boss. When the second boss conflicts with the fourth boss, the sixth boss is separated from the fourth boss, and the push rod is between the sixth boss and the seventh boss. When leakage tripping occurs, the movement of the moving iron core drives the movement of the push rod, and the push rod pushes the trip rod to retract it. The push rod continues to move, conflicts with the arc surface, and continues to push the contact seat to rotate to achieve tripping. The tripping can be completed quickly and without connection. At the same time, the end of the push rod conflicts with the arc surface, which can effectively block the arc from entering the activity space from the gap between the sixth boss and the seventh boss to affect the locking and tripping.

[0011] The utility model is further configured as follows: a first extension platform and a second extension platform are respectively provided on both side surfaces of the partition, and a third boss and a fifth boss are obliquely arranged on the corresponding contact seats. In the open state, a first gap is formed between the end of the third boss and the first extension platform, and a second gap is formed between the end of the fifth boss and the second extension platform.

[0012] By further adopting the above-mentioned setting, the inclined setting will not be hindered when the contact seat rotates, and the rotation is smooth. When the contact seat moves, the side walls of the third boss and the fifth boss are always in conflict with the partition. The first gap and the second gap are small, and the generated arc will be cut into small arcs even if it enters from the gap, thereby not affecting the locking and tripping between the two contact seats.

[0013] The utility model is further configured that an eighth boss is provided on the N-pole contact seat at the right side of the connecting column, and when the L-pole contact seat is connected to the N-pole contact seat, the eighth boss abuts against the L-pole contact seat.

[0014] With the above further configuration, the eighth boss can limit the rotation angle of the jumper to prevent it from excessive rotation, and abut against the L-pole contact seat, so that the structure between the L-pole contact seat and the N-pole contact seat is stable.

[0015] The utility model is further configured as follows: a mounting shaft is provided on the base, a connecting groove is provided on the L-pole contact seat and the N-pole contact seat, the two connecting grooves are located at the same height, a first tension spring is provided between the mounting shaft and the L-pole contact seat, and a second tension spring is provided between the mounting shaft and the N-pole contact seat.

[0016] By adopting the above-mentioned further arrangement, under the pulling of the tension spring, the contact seat rotates around the pin shaft, driving the moving contact to move, thereby realizing the disconnection movement with the static contact. The two tension springs generate pulling force on the two contact seats, so that the contact seats have good stability during opening and closing actions, will not produce deflection, and ensure good contact between the moving and static contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the closing state;

[0018] Figure 2 It is a schematic diagram of the open state;

[0019] Figure 3 is a schematic diagram of two contact seats;

[0020] Figure 4 It is a schematic diagram of the L-pole contact seat, the lock catch and the jump catch;

[0021] Figure 5 It is a schematic diagram of the N-pole contact seat, the lock buckle and the jump buckle;

[0022] Figure 6 It is a schematic diagram of the N-pole contact seat facing the L-pole contact seat;

[0023] Figure 7 It is the installation diagram of the L-pole contact seat and the L-pole moving contact;

[0024] Figure 8 It is a schematic diagram of the side where the L-pole contact seat faces the N-pole contact seat;

[0025] Fig. 9 This is a schematic diagram of the installation of the tension spring;

[0026] Fig.10 is a schematic diagram of the partition and the operating mechanism;

[0027] Fig.11 This is a schematic diagram of the other side of the partition and the operating mechanism.

[0028] In the figure, 1, base; 11, partition; 111, first extension platform; 112, second extension platform; 113, first gap; 114, second gap; 12, mounting shaft; 2, handle; 3, lock; 31, occlusal surface; 32, tripping rod; 4, tripping buckle; 5, electromagnetic system; 51, top rod; 61, L-pole contact seat; 611, arc groove; 612, fourth boss; 613, fifth boss; 614, seventh boss; 61 5. Second arc surface; 62. L-pole moving contact; 63. N-pole contact seat; 631. First boss; 6311. First locking spring placement groove; 632. Second boss; 633. Third boss; 634. Sixth boss; 635. First arc surface; 636. Eighth boss; 64. N-pole moving contact; 7. Connecting rod; 8. Connecting column; 9. Activity space; 10. Locking spring; 20. First tension spring; 30. Second tension spring. DETAILED DESCRIPTION

[0029] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that in the description of the present utility model, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0032] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] like Figure 1-11As shown, a circuit breaker operating mechanism includes a base 1, a handle 2, a lock 3 and a trip button 4, wherein the handle 2 is rotatably arranged on the base 1, and the handle 2 is connected to the trip button 4 through a connecting rod 7, which belongs to the prior art and is not described in detail, and further includes an L-pole contact seat 61, an L-pole moving contact 62 arranged on the L-pole contact seat 61, an N-pole contact seat 63 and an N-pole moving contact 64 arranged on the N-pole contact seat 63, wherein the L-pole contact seat 61 is provided with an arc groove 611 for the connecting rod 7 to move, and a partition 11 is provided on the base 1, and the L-pole moving contact 62 and the N-pole moving contact 64 are respectively arranged on the partition 11 On both sides, the L-pole contact seat 61 and the N-pole contact seat 63 are connected by a connecting column 8 to form an activity space 9, the lock buckle 3 and the jump buckle 4 are rotatably arranged in the activity space 9, and the jump buckle 4 is rotatably sleeved on the connecting column 8, and the N-pole contact seat 63 is provided with a first boss 631, a second boss 632 and a third boss 633 on the side facing the L-pole contact seat 61, the second boss 632 is located on the left side of the first boss 631, and is spaced apart from the first boss 631, the middle part of the lock buckle 3 is installed between the first boss 631 and the second boss 632 through a pin shaft, and the upper end of the lock buckle 3 is provided with a contact with the jump buckle 4 Cooperating with the engaging surface 31 for limiting the rotation of the jump buckle 4, the L-pole contact seat 61 is provided with a fourth boss 612 and a fifth boss 613 on one side facing the N-pole contact seat 63. When the L-pole contact seat 61 is connected with the N-pole contact seat 63, the first boss 631 abuts against the L-pole contact seat 61, the second boss 632 abuts against the fourth boss 612, the third boss 633 and the fifth boss 613 are located on both sides of the partition 11 and are arranged to abut against the partition 11. A tripping rod 32 is provided on the lock buckle 3, and the tripping rod 32 is located below the second boss 632 and the fourth boss 612. When the switch is in the closed state, the tripping rod 32 It extends out of the activity space 9 and is located on one side of the electromagnetic system 5. When tripping, the lock buckle 3 rotates the tripping rod 32 under the action of the electromagnetic system 5 to retract into the activity space 9. The structural layout is reasonable, the installation is convenient, the movement is stable, the lock buckle 3 can flexibly move between the two contact seats, and the tripping is rapid. When the electromagnetic system 5 is working, the tripping rod 32 is pushed to rotate the lock buckle 3, and the tripping rod 32 is retracted into the activity space 9. The position setting of each boss will not affect the movement of the lock buckle 3, and it can move flexibly between the two contact seats, and the movement is smooth and unobstructed. Long grooves are provided on the L-pole contact seat 61 and the N-pole contact seat 63, and the pin shaft is passed through the long grooves.

[0034] A lock spring 10 is provided between the lock 3 and the N-pole contact seat 63, a first lock spring placement groove 6311 is provided on the lower end surface of the first boss 631, a second lock spring placement groove is provided on the lock 3, and both ends of the lock spring 10 are respectively located in the corresponding lock spring placement grooves. The lock spring 10 has a stable structure, is not easy to be damaged, and can better apply a reset force to the lock 3.

[0035] The electromagnetic system 5 includes a moving iron core and a push rod 51 that slides synchronously with the moving iron core. The specific structure of the electromagnetic system 5 belongs to the prior art, so it is not described in detail. A sixth boss 634 is provided on the N-pole contact seat 63 below the second boss 632, and a seventh boss 614 is provided on the L-pole contact seat 61 below the fourth boss 612. The sixth boss 634 is separated from the seventh boss 614. The trip rod 32 is located between the sixth boss 634 and the seventh boss 614. The sixth boss 634 and the outer side surface of the second boss 632 are integrally formed to form a first arc surface 635, and the seventh boss 614 and the outer side surface of the fourth boss 612 are integrally formed to form a second arc surface 615. When the trip rod 32 is retracted, the end of the push rod 51 is in contact with the two The arc surface is set in abutment with each other, the second boss 632 protrudes from the sixth boss 634, and the fourth boss 612 protrudes from the seventh boss 614. When the second boss 632 is in abutment with the fourth boss 612, the sixth boss 634 is separated from the fourth boss 612, and the top rod 51 is between the sixth boss 634 and the seventh boss 614. When leakage tripping occurs, the movement of the moving iron core drives the top rod 51 to move, and the top rod 51 pushes the tripping rod 32 to retract it. The top rod 51 continues to move and hits the arc surface, and continues to push the contact seat to rotate to achieve tripping. The tripping can be completed quickly without connection. At the same time, the end of the top rod 51 hits the arc surface, which can effectively prevent the arc from entering the activity space 9 from the gap between the sixth boss 634 and the seventh boss 614 to affect the lock buckle 3 and the jump buckle 4. The first extension platform 111 and the second extension platform 112 are respectively provided on both side surfaces of the partition 11, and the second extension platform 112 is inclined. The third boss 633 and the fifth boss 613 are inclined on the corresponding contact seat. In the open state, a first gap 113 is formed between the end of the third boss 633 and the first extension platform 111, and a second gap 114 is formed between the end of the fifth boss 613 and the second extension platform 112. The inclined arrangement will not hinder the rotation of the contact seat, and the rotation is smooth. When the contact seat moves, the side walls of the third boss 633 and the fifth boss 613 are always in conflict with the partition 11. The first gap 113 and the second gap 114 are relatively small, and the generated arc will be cut into small arcs even if it enters from the gap, thereby not affecting the lock buckle 3 and the jump buckle 4 between the two contact seats. An eighth boss 636 is provided on the N-pole contact seat 63 on the right side of the connecting column 8. When the L-pole contact seat 61 is connected to the N-pole contact seat 63, the eighth boss 636 abuts against the L-pole contact seat 61. The eighth boss 636 can limit the rotation angle of the jumper 4 to prevent it from excessive rotation, and abuts against the L-pole contact seat 61, so that the structure between the L-pole contact seat 61 and the N-pole contact seat 63 is stable.

[0036] The base 1 is provided with a mounting shaft 12, and the L-pole contact seat 61 and the N-pole contact seat 63 are both provided with connecting grooves 616 and 637, and the two connecting grooves are located at the same height. A first tension spring 20 is provided between the mounting shaft 12 and the L-pole contact seat 61, and a second tension spring 30 is provided between the mounting shaft 12 and the N-pole contact seat 63. The connecting groove is set as an elliptical groove, and one end of the tension spring is hooked in the elliptical groove to generate an overtravel. The setting of the tension spring can cause the product to return to its original position when it is tripped, and can generate a final pressure. Under the pull of the tension spring, the contact seat rotates around the pin shaft, driving the moving contact to move, and realizing the disconnection movement with the static contact. The two tension springs generate a pulling force on the two contact seats, so that the contact seat has good stability during the opening and closing action, and will not produce deflection, thereby ensuring good contact between the moving and static contacts.

Claims

1. A circuit breaker operating mechanism, comprising a base (1), a handle (2), a lock (3) and a trip lock (4), wherein the handle (2) is rotatably arranged on the base (1), and the handle (2) and the trip lock (4) are connected via a connecting rod (7), characterized in that: The invention also comprises an L-pole contact seat (61), an L-pole moving contact (62) arranged on the L-pole contact seat (61), an N-pole contact seat (63), and an N-pole moving contact (64) arranged on the N-pole contact seat (63); the L-pole contact seat (61) is provided with an arc groove (611) for the connecting rod (7) to move; the base (1) is provided with a partition (11); the L-pole moving contact (62) and the N-pole moving contact (64) are respectively arranged on both sides of the partition (11); the L-pole contact seat (61) and the N-pole contact seat (63) are connected to each other. ) are connected via a connecting column (8) to form an activity space (9); the lock buckle (3) and the jump buckle (4) are rotatably arranged in the activity space (9), and the jump buckle (4) is rotatably sleeved on the connecting column (8); a first boss (631), a second boss (632) and a third boss (633) are provided on the side of the N-pole contact seat (63) facing the L-pole contact seat (61); the second boss (632) is located on the left side of the first boss (631) and is spaced apart from the first boss (631); the lock buckle (3) The middle portion is installed between the first boss (631) and the second boss (632) through a pin shaft, and the upper end of the lock buckle (3) is provided with a bite surface (31) that contacts and cooperates with the jump buckle (4) to limit the rotation of the jump buckle (4), and the side of the L-pole contact seat (61) facing the N-pole contact seat (63) is correspondingly provided with a fourth boss (612) and a fifth boss (613). When the L-pole contact seat (61) is connected to the N-pole contact seat (63), the first boss (631) contacts the L-pole contact seat (61), and the second boss (632) The third boss (633) and the fifth boss (613) are located on both sides of the partition (11) and are arranged to be in contact with the partition (11). The lock buckle (3) is provided with a tripping rod (32), and the tripping rod (32) is located below the second boss (632) and the fourth boss (612). When the switch is closed, the tripping rod (32) extends out of the activity space (9). When the lock buckle (3) is released, it rotates under the action of the electromagnetic system (5), and the tripping rod (32) retracts into the activity space (9).

2. The circuit breaker operating mechanism according to claim 1, characterized in that: A lock spring (10) is provided between the lock (3) and the N-pole contact seat (63); a first lock spring placement groove (6311) is provided on the lower end surface of the first boss (631); a second lock spring placement groove is provided on the lock (3); and both ends of the lock spring (10) are respectively located in corresponding lock spring placement grooves.

3. The circuit breaker operating mechanism according to claim 1 or 2, characterized in that: The electromagnetic system (5) comprises a moving iron core and a push rod (51) that slides synchronously with the moving iron core. A sixth boss (634) is provided on the N-pole contact seat (63) below the second boss (632). A seventh boss (614) is provided on the L-pole contact seat (61) below the fourth boss (612). The sixth boss (634) and the seventh boss (614) are separated from each other. The trip rod (32) is located between the sixth boss (634) and the seventh boss (614). The sixth boss (634) and the outer side surface of the second boss (632) are integrally formed to form a first arc surface (635). The seventh boss (614) and the outer side surface of the fourth boss (612) are integrally formed to form a second arc surface (615). When the trip rod (32) is retracted, the end of the push rod (51) is disposed in contact with the two arc surfaces.

4. The circuit breaker operating mechanism according to claim 1 or 2, characterized in that: A first extension platform (111) and a second extension platform (112) are respectively provided on both side surfaces of the partition plate (11); a third boss (633) and a fifth boss (613) are obliquely arranged on corresponding contact seats; in an open state, a first gap (113) is formed between the end of the third boss (633) and the first extension platform (111); and a second gap (114) is formed between the end of the fifth boss (613) and the second extension platform (112).

5. The circuit breaker operating mechanism according to claim 1 or 2, characterized in that: An eighth boss (636) is provided on the N-pole contact seat (63) on the right side of the connecting column (8); when the L-pole contact seat (61) is connected to the N-pole contact seat (63), the eighth boss (636) abuts against the L-pole contact seat (61).

6. The circuit breaker operating mechanism according to claim 1 or 2, characterized in that: The base (1) is provided with a mounting shaft (12), the L-pole contact seat (61) and the N-pole contact seat (63) are both provided with connection grooves, the two connection grooves are located at the same height, a first tension spring (20) is provided between the mounting shaft (12) and the L-pole contact seat (61), and a second tension spring (30) is provided between the mounting shaft (12) and the N-pole contact seat (63).

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