Quick closing circuit breaker

Abstract

The utility model provides a fast closing circuit breaker, which comprises a contact mechanism, an operating mechanism and a limiting assembly, in the closing process, a moving contact has a first state in which the moving contact is linked with a moving contact frame and rotates towards a direction close to a static contact, and a second state in which the moving contact keeps a constant distance from the static contact after abutting against a limiting block and a first elastic piece stores energy; compared with the prior art, through the arrangement of the energy storage mechanism, the movable contact and the static contact can be quickly connected, the phenomenon that the contact is ablated or welded due to high temperature due to the fact that the contact is connected or disconnected due to human factors is avoided, and the safety of the contact is improved. And the service life of the circuit breaker is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a fast-closing circuit breaker. Background Art

[0002] A miniature circuit breaker is a low-voltage protective device used to connect or interrupt loads and protect lines and equipment in power distribution systems. It has both manual switching functions and can automatically perform loss of voltage, undervoltage, overload, and short-circuit protection.

[0003] There are uncontrollable factors in the manual closing process of the circuit breaker. The closing speed is completely affected by human factors. For example, if the person closes the circuit breaker at a slow speed, the moving and static contacts will touch at a slow speed, resulting in a phenomenon of seeming to be connected but not connected. There is a risk of contact ablation or even welding, which shortens the service life of the circuit breaker. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect of the prior art that the contacts are easily ablated, thereby providing a fast-closing circuit breaker with contacts that are not easily ablated and have a long service life.

[0005] To this end, the utility model provides a fast closing circuit breaker, including a contact mechanism, an operating mechanism and a limit assembly, the contact mechanism including a static contact and a moving contact assembly, the moving contact assembly including a moving contact frame rotatably mounted on a housing, and a moving contact movably arranged on the moving contact frame, a first elastic member is arranged between the moving contact and the moving contact frame; the operating mechanism is suitable for driving the moving contact frame to rotate, and includes a knob, a first connecting rod, a transmission member and a second connecting rod, one end of the first connecting rod is connected to the knob, and the other end is connected to the transmission member, the transmission member has a first end and a second end respectively arranged on both sides thereof, the transmission member can rotate around the second end, one end of the second connecting rod is connected to the first end of the transmission member, and the other end is connected to the moving contact frame Connecting; a limit assembly, comprising a rotating shaft rotatably mounted on the shell, and a limit block and a disconnect handle arranged on the rotating shaft, the limit block is arranged corresponding to the moving contact, and the disconnect handle is arranged corresponding to the transmission member, the limit assembly has a first position in which the limit block abuts against the moving contact, and a second position in which the disconnect handle is driven by the transmission member and the limit block is separated from the moving contact; wherein, during the closing process, the moving contact has a first state in which it is linked with the moving contact frame and rotates toward the static contact, a second state in which after abutting against the limit block, the distance between the moving contact and the static contact remains unchanged and the first elastic member stores energy, and a third state in which the limit assembly is switched to the second position and contacts the static contact under the elastic force of the first elastic member.

[0006] The moving contact has a moving contact point arranged corresponding to the static contact point of the static contact. One end of the first elastic member abuts against the end of the moving contact away from the moving contact point, and the other end abuts against the moving contact frame.

[0007] The housing is also provided with a second elastic member for driving the limiting assembly to return from the second position to the first position.

[0008] It also includes a lock buckle and a jump buckle rotatably mounted on the shell, the jump buckle is provided with a first buckle tooth, the lock buckle has a second buckle tooth that can abut against the first buckle tooth, and a connecting block connected to the second end of the transmission member.

[0009] A first rivet hole is provided on the second end, and a second rivet hole is provided on the connecting block. After the rivet passes through the first rivet hole and the second rivet hole in sequence, the transmission member is connected to the lock buckle.

[0010] It also includes a third elastic member, which is a torsion spring sleeved on the rivet, one end of the torsion spring abuts against the transmission member, and the other end abuts against the lock.

[0011] It also includes a fourth elastic member, one end of which is against the inner wall of the shell, and the other end of which is against the jump buckle.

[0012] The technical solution of the utility model has the following advantages:

[0013] 1. The utility model provides a fast closing circuit breaker, in which, during the closing process, the moving contact has a first state in which the moving contact is linked with the moving contact frame and rotates toward the static contact, a second state in which the distance between the moving contact and the static contact remains unchanged after abutting against the limit block and the first elastic member stores energy, and a third state in which the limit assembly is switched to the second position and contacts the static contact under the elastic force of the first elastic member. Compared with the prior art, by providing an energy storage mechanism, the moving and static contacts can be quickly connected, avoiding the situation in which the contacts are not connected due to human factors, resulting in ablation or welding of the contacts due to high temperature, thereby improving the service life of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the circuit breaker of the utility model in the open state;

[0016] Figure 2 It is a schematic diagram of the first state of the circuit breaker during the closing process (locking catch and tripping catch are locked);

[0017] Figure 3 It is a schematic diagram of the second state of the circuit breaker during the closing process (the limit block and the moving contact are against each other);

[0018] Figure 4 It is a schematic diagram of the third state of the circuit breaker during the closing process (the transmission member and the disconnecting handle are against each other);

[0019] Figure 5 is a schematic diagram of the fourth state of the circuit breaker during the closing process (a critical state where the limiter is separated from the moving contact);

[0020] Figure 6 It is a structural schematic diagram of the circuit breaker in the closed state;

[0021] Figure 7 It is a three-dimensional diagram of the contact mechanism, the operating mechanism and the limiting mechanism;

[0022] Figure 8 It is a schematic diagram of the explosion structure of the contact mechanism, operating mechanism and limiting mechanism;

[0023] Fig. 9 It is a schematic diagram of the assembly of the transmission parts and the lock.

[0024] Explanation of the accompanying drawings: 1. static contact; 2. moving contact assembly; 3. housing; 4. moving contact frame; 5. moving contact; 6. first elastic member; 7. knob; 8. first connecting rod; 9. transmission member; 10. second connecting rod; 11. first end; 12. second end; 13. rotating shaft; 14. limiting block; 15. disconnecting handle; 17. static contact; 18. moving contact; 19. second elastic member; 20. locking buckle; 21. first buckle tooth; 22. second buckle tooth; 23. jumping buckle; 24. connecting block; 25. first rivet hole; 26. second rivet hole; 27. rivet; 28. third elastic member; 29. ​​fourth elastic member. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Example

[0030] This embodiment provides a fast closing circuit breaker, such as Figure 1 , Figure 7 and Figure 8 As shown, it includes a contact mechanism, an operating mechanism and a limit assembly.

[0031] Contact mechanism, such as Figure 1 , 7 As shown in Figure 8, it includes a static contact 1 and a moving contact assembly 2. The moving contact assembly 2 includes a moving contact frame 4 rotatably mounted on a housing 3, and a moving contact 5 movably arranged on the moving contact frame 4. A first elastic member 6 is arranged between the moving contact 5 and the moving contact frame 4. In this embodiment, the moving contact 5 has a moving contact 18 corresponding to the static contact 17 of the static contact 1. One end of the first elastic member 6 abuts against the end of the moving contact 5 away from the moving contact 18, and the other end abuts against the moving contact frame 4. In the closing process, the moving contact 5 has a first state of being linked with the moving contact frame 4 and rotating toward the static contact 1, a second state of maintaining a constant distance with the static contact 1 after abutting against the limit block 14 and the first elastic member 6 storing energy, and a third state of contacting the static contact 1 under the elastic force of the first elastic member 6 after the limit assembly is switched to the second position.

[0032] The operating mechanism is suitable for driving the movable contact frame 4 to rotate, and includes a knob 7, a first connecting rod 8, a transmission member 9, a second connecting rod 10, a lock buckle 20 and a jump buckle 23, as shown in FIG. Figure 1 As shown, one end of the first connecting rod 8 is connected to the knob 7, and the other end is connected to the middle of the transmission member 9. The transmission member 9 has a first end 11 and a second end 12 respectively arranged on both sides thereof, and the transmission member 9 can rotate around the second end 12. One end of the second connecting rod 10 is connected to the first end 11 of the transmission member 9, and the other end is connected to the moving contact frame 4. The jump buckle 23 is provided with a first buckle tooth 21, as shown in FIG. Fig. 9 As shown, the lock buckle 20 has a second clasp tooth 22 that can abut against the first clasp tooth 21, and a connecting block 24 connected to the second end 12 of the transmission member 9, the second end 12 is provided with a first rivet hole 25, and the connecting block 24 is provided with a second rivet hole 26. After the rivet 27 passes through the first rivet hole 25 and the second rivet hole 26 in sequence, the transmission member 9 is connected to the lock buckle 20. The third elastic member 28 is a torsion spring sleeved on the rivet 27, one end of the torsion spring abuts against the transmission member 9, and the other end abuts against the lock buckle 20; one end of the fourth elastic member 29 abuts against the inner wall of the housing 3, and the other end abuts against the jump buckle 23.

[0033] As a convertible embodiment, the inner wall of the housing 1 is integrally formed with a first buckle 21 that abuts against the second buckle 22 of the lock buckle 20 .

[0034] The limit assembly has a rotating shaft 13 rotatably mounted on the housing 3, and a limit block 14 and a disconnecting handle 15 arranged on the rotating shaft 13. The limit block 14 is arranged corresponding to the moving contact 5, and the disconnecting handle 15 is arranged corresponding to the transmission member 9. The limit assembly has a first position in which the limit block 14 abuts against the moving contact 5, and a second position in which the disconnecting handle 15 is driven by the transmission member 9 and the limit block 14 is separated from the moving contact 5. The housing 3 is also provided with a second elastic member 19 for driving the limit assembly to reset from the second position to the first position.

[0035] The working principle of the fast closing circuit breaker of the utility model is as follows:

[0036] In such Figure 1 When the circuit breaker is in the open state, the lock catch 20 and the trip catch 23 are in the separated state, and the limit block 14 of the rotating shaft 13 is in the movable contact 5;

[0037] When closing the circuit breaker, the knob 7 rotates counterclockwise, and the knob 7 drives the transmission member 9 to move through the first connecting rod 8. The second end 12 of the transmission member 9 drives the lock catch 20 to rotate counterclockwise until the second tooth 22 of the lock catch 20 abuts against the first tooth 21 of the jump catch 23 (such as Figure 2 The knob 7 continues to rotate counterclockwise, the lock 20 remains stationary, the transmission member 9 rotates counterclockwise with the rivet 27 as the rotation center, and the transmission member 9 drives the moving contact assembly 2 to rotate clockwise through the second connecting rod 10. When the moving contact assembly 2 rotates to Figure 3 When the movable contact 5 is in the position shown in FIG. 1 , the top end of the movable contact 5 abuts against the limit block 14, that is, the position of the movable contact 5 remains unchanged, and the movable contact frame 4 continues to rotate clockwise under the drive of the second connecting rod 10, as shown in FIG. Figure 4 As shown, the first end 11 of the transmission member 9 abuts against the disconnecting handle 15, thereby driving the rotating shaft 13 to rotate clockwise until the Figure 5 The limit block 14 and the moving contact 5 are about to separate in the critical state shown in FIG. 1 . During this process, the first elastic member 6 accumulates energy; when the limit block 14 and the moving contact 5 are separated (as shown in FIG. 1 ), the first elastic member 6 accumulates energy; Figure 6 As shown), the first elastic member 6 releases energy, thereby driving the moving contact 5 to quickly contact and connect with the static contact 1.

[0038] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A fast closing circuit breaker, characterized in that: include: A contact mechanism comprises a stationary contact (1) and a moving contact assembly (2), wherein the moving contact assembly (2) comprises a moving contact frame (4) rotatably mounted on a housing (3), and a moving contact (5) movably arranged on the moving contact frame (4), wherein a first elastic member (6) is arranged between the moving contact (5) and the moving contact frame (4); An operating mechanism, suitable for driving the movable contact frame (4) to rotate, comprising a knob (7), a first connecting rod (8), a transmission member (9) and a second connecting rod (10), wherein one end of the first connecting rod (8) is connected to the knob (7), and the other end is connected to the transmission member (9), the transmission member (9) has a first end (11) and a second end (12) arranged on both sides thereof, the transmission member (9) can rotate around the second end (12), and one end of the second connecting rod (10) is connected to the first end (11) of the transmission member (9), and the other end is connected to the movable contact frame (4); A limit assembly, comprising a rotating shaft (13) rotatably mounted on the housing (3), and a limit block (14) and a disconnect handle (15) arranged on the rotating shaft (13), wherein the limit block (14) is arranged corresponding to the moving contact (5), and the disconnect handle (15) is arranged corresponding to the transmission member (9), and the limit assembly has a first position in which the limit block (14) and the moving contact (5) are in contact with each other, and a second position in which the disconnect handle (15) is driven by the transmission member (9) and the limit block (14) is separated from the moving contact (5); In the closing process, the moving contact (5) has a first state in which it is linked with the moving contact frame (4) and rotates toward the static contact (1); a second state in which the distance between the moving contact (5) and the static contact (1) remains unchanged after abutting against the limit block (14) and the first elastic member (6) stores energy; and a third state in which the limit assembly is switched to the second position and contacts the static contact (1) under the elastic force of the first elastic member (6).

2. The fast closing circuit breaker according to claim 1, characterized in that: The moving contact (5) has a moving contact (18) arranged corresponding to the stationary contact (17) of the stationary contact (1); one end of the first elastic member (6) abuts against the end of the moving contact (5) away from the moving contact (18), and the other end abuts against the moving contact frame (4).

3. The fast closing circuit breaker according to claim 1 or 2, characterized in that: The housing (3) is also provided with a second elastic member (19) for driving the limiting assembly to return from the second position to the first position.

4. The fast closing circuit breaker according to claim 1, characterized in that: The invention also comprises a lock buckle (20) and a jump buckle (23) rotatably mounted on the housing (3); the jump buckle (23) is provided with a first buckle tooth (21); the lock buckle (20) has a second buckle tooth (22) capable of abutting against the first buckle tooth (21); and a connecting block (24) connected to the second end (12) of the transmission member (9).

5. The fast closing circuit breaker according to claim 4, characterized in that: The second end (12) is provided with a first rivet hole (25), the connecting block (24) is provided with a second rivet hole (26), and the transmission member (9) is connected to the lock buckle (20) by passing the rivet (27) through the first rivet hole (25) and the second rivet hole (26) in sequence.

6. The fast closing circuit breaker according to claim 5, characterized in that: It also includes a third elastic member (28), which is a torsion spring sleeved on the rivet (27), one end of the torsion spring abuts against the transmission member (9), and the other end abuts against the lock buckle (20).

7. The fast closing circuit breaker according to claim 4, characterized in that: It also comprises a fourth elastic member (29), one end of which abuts against the inner wall of the shell (3), and the other end of which abuts against the jump buckle (23).

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