Circuit breaker

Abstract

The utility model provides a circuit breaker, and relates to the technical field of low-voltage electrical appliances, the circuit breaker comprises a shell, and a handle, a quick closing piece and a contact system which are arranged in the shell, the quick closing piece is slidably connected with the shell, one end of the quick closing piece is used for contacting with the handle, the other end of the quick closing piece is used for contacting with a moving contact of the contact system, and after the quick closing piece abuts against the moving contact, the moving contact is closed. And the quick closing piece is pushed into the abdicating groove of the handle through the moving contact. The receding groove is used for receding the quick closing piece in the closing process, and the quick closing piece enters the receding groove, so that the quick closing piece is separated from the moving contact to release energy for closing. According to the utility model, the quick closing piece is directly abutted against and contacted with the moving contact, so that the size chain between the quick closing piece and the moving contact is shortened, the opening distance error is small, and the breaking capacity of the circuit breaker is effectively ensured. Moreover, the quick-closing piece is connected with the shell in a sliding manner, so that the quick-closing piece can quickly slide to the direction of the moving contact or the handle in the shell, the quickness of the movement of the quick-closing piece is ensured, and the response speed of the circuit breaker is also improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage electrical apparatus, in particular to a circuit breaker. BACKGROUND

[0002] The circuit breaker can drive the contact through the operation handle to realize the opening and closing, and realize the cut-off or conduction of the current. The existing circuit breaker can be provided with a quick closing piece, and the energy storage of the movable contact is realized through the quick closing piece to quickly open and close. However, when the existing quick closing piece cooperates with the contact system, the structure design is relatively complex, so that the overall size chain is relatively large, which causes a large opening distance error, and is not conducive to the performance optimization of the circuit breaker. CONTENT OF THE UTILITY MODEL

[0003] The present application aims at the deficiencies in the prior art, and provides a circuit breaker, the size chain of the quick closing piece and the movable contact is relatively short, and the opening distance error is relatively small, so that the breaking performance of the circuit breaker can be ensured.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the embodiments of the present application is as follows:

[0005] In one aspect of the embodiments of the present application, a circuit breaker is provided, which comprises a shell, and a handle, a quick closing piece and a contact system arranged in the shell. The quick closing piece is in sliding connection with the shell. One end of the quick closing piece is used for contacting the handle, and the other end is used for contacting a movable contact of the contact system. After the quick closing piece abuts against the movable contact, the quick closing piece is pushed into a displacement slot of the handle through the movable contact.

[0006] Optionally, one end of the quick closing piece towards the movable contact has a second limiting surface, and one end of the movable contact towards the quick closing piece has a clamping surface in contact with the second limiting surface.

[0007] When the handle rotates to the closing direction, the second limiting surface of the quick closing piece is in contact with the clamping surface of the movable contact to limit the movement of the movable contact for energy storage.

[0008] Optionally, one end of the quick closing piece towards the handle has a first limiting surface, and one end of the handle towards the quick closing piece has a movement surface in contact with the first limiting surface. The displacement slot is arranged on one side of the movement surface.

[0009] When the handle rotates to the closing direction, the movement surface moves along the first limiting surface, and the handle rotates to the movement surface and the first limiting surface are separated. The movable contact pushes the quick closing piece into the displacement slot, and the second limiting surface of the quick closing piece is separated from the clamping surface of the movable contact to release the closing.

[0010] The two ends of the quick closing piece further form a first locking structure and a second locking structure respectively, the first locking structure is used for abutting against the handle, and the second locking structure is used for abutting against the movable contact of the contact system, so that the quick closing piece is locked with the handle and the movable contact after closing, and self-locking of the handle and the movable contact in the closed state is realized.

[0011] Optionally, the first locking structure comprises a first self-locking surface connected with the first limiting surface, one end of the handle towards the quick closing piece has a driving surface abutting against the first self-locking surface, and the driving surface is connected with the movement surface and formed in the accommodation groove; when the handle is rotated to the closed direction to abut the first self-locking surface against the driving surface, the contact system is closed.

[0012] Optionally, the second locking structure comprises a second self-locking surface connected with the second limiting surface, one end of the movable contact towards the quick closing piece has an abutting surface abutting against the second self-locking surface.

[0013] After closing, the first self-locking surface of the quick closing piece is driven to move relative to the driving surface of the handle, so as to drive the quick closing piece to move towards the movable contact until the second self-locking surface of the quick closing piece abuts against the abutting surface of the movable contact, and the handle and the movable contact are self-locked in the closed position.

[0014] Optionally, a tripping mechanism is further provided, the tripping mechanism is connected with the contact system in linkage, so as to drive the contact system to open under the condition of a fault state or a remote signal after self-locking in the closed state, and the quick closing piece is unlocked, and the handle is rotated to reset.

[0015] The handle drives the quick closing piece to move towards the movable contact to stop at a limiting point close to the movable contact, the quick closing piece is separated from the handle, and the handle is rotated to realize unlocking and opening.

[0016] Optionally, a limiting structure is formed on the shell to limit the quick closing piece.

[0017] The limiting structure comprises a limiting groove and a limiting column matched with each other, the limiting groove is arranged on the shell, and the limiting column is arranged on the quick closing piece; or the limiting groove is arranged on the quick closing piece, and the limiting column is arranged on the shell.

[0018] When the limiting groove is arranged on the shell and the limiting column is arranged on the quick closing piece, the quick closing piece is arranged in the limiting groove, a long hole is formed in the limiting groove, and the quick closing piece moves in the long hole through the limiting column to approach or move away from the handle and the movable contact.

[0019] Optionally, the shell comprises a shell base and a shell cover that are relatively buckled, and the limiting groove is arranged on the inner wall of the shell base.

[0020] The limiting structure further comprises a limiting block arranged on the inner wall of the shell cover, and the limiting block abuts against the limiting surface of the quick coupling member away from the limiting column.

[0021] The beneficial effects of the present application include:

[0022] The present application provides a circuit breaker. By arranging a quick coupling member between a handle and a contact system, two ends of the quick coupling member can be in direct contact with a movable contact and the handle respectively. When the quick coupling member cooperates with the movable contact during closing, the movable contact cannot move due to the abutment between the quick coupling member and the movable contact, so as to enter the quick coupling energy storage stage. After the abutment between the quick coupling member and the movable contact, the quick coupling member is pushed to the handle through the movable contact and enters the relief groove. The quick coupling member enters the relief groove, so that the quick coupling member and the movable contact are separated to release the closing. Compared with the existing quick coupling member cooperating with the contact seat, the quick coupling member in the present application directly abuts and contacts with the movable contact, which shortens the size chain between the quick coupling member and the movable contact, so that the opening distance error is small, and the breaking capacity of the circuit breaker is effectively ensured. Moreover, the quick coupling member is connected with the shell in a sliding manner, so that the quick coupling member can quickly slide to the direction of the movable contact or the handle in the shell, ensuring the quickness of the movement of the quick coupling member, and improving the response speed of the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0024] Figure 1 A schematic diagram of the appearance of a circuit breaker provided by the embodiments of the present application;

[0025] Figure 2 A schematic diagram of the starting closing state of a circuit breaker provided by the embodiments of the present application;

[0026] Figure 3 A partial schematic diagram of the starting closing state of a circuit breaker provided by the embodiments of the present application;

[0027] Figure 4 A schematic diagram of the energy storage state of a circuit breaker provided by the embodiments of the present application;

[0028] Figure 5 A partial schematic diagram of the energy storage state of a circuit breaker provided by the embodiments of the present application;

[0029] Figure 6 A circuit breaker energy release closing state schematic diagram provided for an embodiment of the present application;

[0030] Figure 7 A circuit breaker energy release closing state schematic diagram provided for an embodiment of the present application;

[0031] Figure 8 A circuit breaker self-locking state schematic diagram provided for an embodiment of the present application;

[0032] Figure 9 A circuit breaker self-locking state schematic diagram provided for an embodiment of the present application;

[0033] Figure 10 A circuit breaker partial structure schematic diagram provided for an embodiment of the present application;

[0034] Figure 11 A circuit breaker shell cover structure schematic diagram provided for an embodiment of the present application;

[0035] Figure 12 A circuit breaker quick closing member structure schematic diagram provided for an embodiment of the present application;

[0036] Figure 13 A circuit breaker handle structure schematic diagram provided for an embodiment of the present application;

[0037] Figure 14 A circuit breaker moving contact structure schematic diagram provided for an embodiment of the present application;

[0038] Figure 15 A circuit breaker opening state schematic diagram provided for an embodiment of the present application;

[0039] Figure 16 A circuit breaker opening state schematic diagram provided for an embodiment of the present application.

[0040] Icon: 10 - shell; 10a - shell seat; 10b - shell cover; 11 - handle; 110 - operating rod; 111 - movement surface; 112 - driving surface; 12 - quick closing member; 113 - let go slot; 12A - first locking structure; 12B - second locking structure; 121 - first limiting surface; 122 - first self-locking surface; 123 - second limiting surface; 124 - second self-locking surface; 125 - limiting column; 126 - limiting surface; 13 - limiting slot; 130 - long hole; 14 - connecting rod; 15 - operating mechanism; 150 - mechanism seat; 16 - locking mechanism; 160 - locking member; 17 - contact system; 171 - moving contact; 171a - abutting surface; 171b - clamping surface; 172 - stationary contact; 18 - limiting block. DETAILED DESCRIPTION

[0041] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. It should be noted that the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the protection scope of the present application, without conflict.

[0043] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0045] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0046] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] The existing quick coupling generally adopts a rotating friction mode and cooperates with a contact seat, so that the size chain between the quick coupling and the movable contact is large, resulting in large opening error.

[0048] To solve the above problems, one aspect of the embodiments of the present application provides a circuit breaker, comprising a housing 10, and a handle 11, an operating mechanism 15 and a contact system 17 sequentially linked and arranged in the housing 10, the handle 11 drives the contact system 17 to open and close through the operating mechanism 15. Figure 1

[0049] The housing 10 is also provided with a quick coupling 12 between the handle 11 and the contact system 17, the quick coupling 12 is in sliding connection with the housing 10, one end of the quick coupling 12 is used for direct contact with the handle 11, and the other end is used for direct contact with the movable contact 171 of the contact system 17, when the quick coupling 12 contacts and abuts against the movable contact 171, it enters the quick coupling energy storage state, at this time the movable contact 171 cannot act, as shown in Figure 4 、 Figure 5 .

[0050] After the energy storage is completed, it enters the energy release stage, after the quick coupling 12 abuts against the movable contact 171, the movable contact 171 can push the quick coupling 12 to move towards the handle 11, the quick coupling 12 enters the accommodation groove 113 of the handle 11, the quick coupling 12 separates from the movable contact 171 to enter the energy release stage, the movable contact 171 contacts and closes the static contact 172 (as shown in Figure 6 、 Figure 7 .

[0051] The accommodation groove 113 on the handle 11 is provided to accommodate the quick coupling 12 during closing, the quick coupling 12 enters the accommodation groove 113 to separate the quick coupling 12 from the movable contact 171 to release energy and close.

[0052] Figure 6 and Figure 7 show the state diagram of the closing position, the handle 11, the operating mechanism 15 and the contact system 17 are sequentially linked to realize the opening and closing of the contact system 17; the handle 11 has an operating rod 110 which extends out of the housing 10 for operation.

[0053] The handle 11 and the mechanism seat 150 of the operating mechanism 15 are connected through a connecting rod 14 to drive the operating mechanism 15 to act; the mechanism seat 150 and the movable contact 171 are coaxially arranged in the housing 10 to facilitate driving the movable contact 171 to rotate to open and close the static contact 172; the above structure can realize the conventional opening and closing of the circuit breaker and other operations.

[0054] ​The shell 10 of the application further has a quick-assembly part 12 between the handle 11 and the contact system 17, and the two ends of the quick-assembly part 12 are in direct contact with the movable contact 171 and the handle 11 respectively. When the quick-assembly part 12 cooperates with the movable contact 171 during closing, the movable contact 171 cannot move due to the abutting of the quick-assembly part 12 and the movable contact 171, so as to enter the quick-assembly energy storage stage. Compared with the cooperation of the existing quick-assembly part and the contact seat, the quick-assembly part 12 of the application directly abuts against the movable contact 171, which shortens the size chain between the quick-assembly part 12 and the movable contact 171, so that the opening error is small, and the breaking capacity of the circuit breaker is effectively ensured. Moreover, the quick-assembly part 12 is connected with the shell 10 in a sliding manner, so that the quick-assembly part 12 can quickly slide towards the movable contact 171 or the handle 11 in the shell 10, which ensures the quickness of the movement of the quick-assembly part 12, and thus improves the response speed of the circuit breaker.

[0055] Specifically, the end of the quick-assembly part 12 towards the movable contact 171 has a second limiting surface 123, and the end of the movable contact 171 towards the quick-assembly part 12 has a clamping surface 171b in contact with the second limiting surface 123.

[0056] As shown in Figure 2 , Figure 3 , when starting to close, the handle 11 rotates in the closing direction, and the second limiting surface 123 of the quick-assembly part 12 moves relative to the clamping surface 171b of the movable contact 171. When the handle 11 rotates to the position where the second limiting surface 123 of the quick-assembly part 12 abuts against the clamping surface 171b of the movable contact 171 to limit the movement of the movable contact 171, the system enters the energy storage stage, and the movable contact 171 cannot move, as shown in Figure 4 , Figure 5 .

[0057] After the energy storage is completed, the system enters the energy release stage. The end of the quick-assembly part 12 towards the handle 11 has a first limiting surface 121, the end of the handle 11 towards the quick-assembly part 12 has a movement surface 111 in contact with the first limiting surface 121, and one side of the movement surface 111 is provided with a displacement slot 113.

[0058] The handle 11 continues to rotate in the closing direction, and the movement surface 111 moves along the first limiting surface 121 until the handle 11 rotates to the position where the movement surface 111 is separated from the first limiting surface 121. At this time, the movable contact 171 can push the quick-assembly part 12 to move towards the handle 11, the quick-assembly part 12 enters the displacement slot 113 of the handle 11, the second limiting surface 123 of the quick-assembly part 12 is separated from the clamping surface 171b of the movable contact 171, and the system enters the energy release stage. The movable contact 171 contacts the static contact 172 to close (as shown in Figure 6 , Figure 7 ).

[0059] In addition, the housing 10 is formed with a limiting structure for limiting the quick coupling member 12. The limiting structure of the application comprises a limiting groove 13 and a limiting post 125 which cooperate with each other. The housing 10 comprises a housing base 10a and a housing cover 10b which are buckled to each other. The handle 11, the quick coupling member 12, the operating mechanism 15, the contact system 17 and the like are arranged on the inner wall of the housing base 10a. As shown in Figure 10 , the limiting groove 13 is arranged on the inner wall of the housing base 10a to cooperate with the limiting post 125 of the quick coupling member 12 to limit the quick coupling member 12 when the circuit breaker is opened. The limiting groove 13 can also cooperate with the limiting post 125 of the quick coupling member 12 to limit the quick coupling member 12 when the circuit breaker is closed.

[0060] Alternatively, the limiting groove 13 can be arranged on the quick coupling member 12, and the limiting post 125 can be arranged on the housing base 10a of the housing 10. In this way, the limiting post 125 can also limit the quick coupling member 12.

[0061] In the example of the application, Figure 10 , the quick coupling member 12 is arranged in the limiting groove 13. The limiting groove 13 is arranged on the inner wall of the housing base 10a, and the limiting post 125 is arranged on the surface of the quick coupling member 12 which faces the limiting groove 13. The limiting groove 13 is formed with a long hole 130. The quick coupling member 12 moves in the long hole 130 through the limiting post 125, so as to realize the movement of the quick coupling member 12 in the limiting groove 13, and to move close to or away from the handle 11 and the movable contact 171.

[0062] The quick coupling member 12 moves along the limiting groove 13, and the limiting post 125 extends into the long hole 130 of the limiting groove 13. When the limiting post 125 is blocked by the inner wall of the long hole 130, the limiting of the movement of the quick coupling member 12 in the limiting groove 13 is realized. In the application, the quick coupling member 12 is limited by the long hole 130 of the limiting groove 13 at the closing position Figure 7 and the opening position Figure 16 .

[0063] In addition, referring to Figure 11 , a limiting block 18 is arranged on the side wall of the housing 10. The limiting block 18 is arranged on the inner wall of the housing cover 10b. The limiting block 18 abuts against the limiting surface 126 of the quick coupling member 12 which is away from the limiting post 125, so as to abut against and limit the quick coupling member 12, and to lock the quick coupling member 12 in the housing 10.

[0064] It can be seen that, through the above arrangement, the quick coupling member has the function of quick coupling and energy storage. In addition, the quick coupling member of the application also has the function of self-locking.

[0065] Specifically, Figure 8 , Figure 9The state diagram of the closing self-locking is shown. The quick coupling member 12 is locked with the handle 11 and the contact system 17 respectively after the closing, for the closing self-locking of the handle 11 and the contact system 17. In this way, the handle 11 can be locked by the quick coupling member 12, and the quick coupling member 12 also locks the movable contact 171, so that the handle 11 cannot operate the movable contact 171. After the contact system 17 is closed by operating the handle 11 to drive the operating mechanism 15, the handle 11 cannot be operated to make the contact system 17 open, because the handle 11 and the contact system 17 are locked by the quick coupling member 12. Thus, the problem of the contact system 17 being opened by mistake when the contact system 17 is in the closed state due to the mistaken operation of the handle 11 is solved, and great loss caused by the mistaken opening of the contact system 17 after the closing in important places such as hospitals is avoided, so as to adapt to places with high requirements for power supply reliability.

[0066] Moreover, the quick coupling member 12 is used alone to complete the quick coupling energy storage and the closing self-locking, and the structure is simple. The quick coupling member 12 is also slidingly arranged in the housing 10, can directly act on the handle 11 and the contact system 17, and is beneficial to the compact layout of the circuit breaker and the reduction of the space occupation of the circuit breaker.

[0067] Specifically, as shown in Figure 12 , the two ends of the quick coupling member 12 are respectively formed with a first locking structure 12A and a second locking structure 12B. The first locking structure 12A is used to abut against the handle 11, and the second locking structure 12B is used to abut against the movable contact 171 of the contact system 17.

[0068] The quick coupling member 12 is arranged between the handle 11 and the movable contact 171. One end of the quick coupling member 12 abuts against the handle 11 through the first locking structure 12A, to realize the self-locking of the handle 11 after the closing. The other end of the quick coupling member 12 abuts against the movable contact 171 through the second locking structure 12B, to realize the self-locking of the movable contact 171 after the closing.

[0069] Specifically, the first locking structure 12A includes Figure 12 a first self-locking surface 122 connected with a first limiting surface 121. One end of the handle 11 towards the quick coupling member 12 has a driving surface 112 abutting against the first self-locking surface 122. The driving surface is also connected with the movement surface 111 and is formed in the clearance groove 113.

[0070] As shown in Figure 13 , when the handle 11 rotates to the closing position, the first limiting surface 121 moves along the movement surface 111, and when the first self-locking surface 122 abuts against the driving surface 112, the contact system 17 is closed.

[0071] In which, as shown in Figure 15 , Figure 16In the opening state, the moving surface 111 of the handle 11 is a circular arc surface on the circumference, which is matched with the first limiting surface 121 of the fast closing member 12. The first limiting surface 121 contacts the moving surface 111; in the closing process, Figure 2 、 Figure 3 As shown, the handle 11 rotates clockwise toward the closing direction, so that the moving surface 111 moves relative to the first limiting surface 121, that is, the moving surface 111 rotates and the first limiting surface 121 does not move; Figure 4 、 Figure 5 As shown, when the handle 11 continues to rotate in the closing direction until the first limit surface 121 and the moving surface 111 are about to separate, the moving contact 171 and the static contact 172 have not yet contacted to close.

[0072] like Figure 6 、 Figure 7 As shown, the handle 11 continues to rotate in the closing direction until the first self-locking surface 122 slides up along the driving surface 112 until the two surfaces contact each other, and the quick-closing member 12 simultaneously moves along the limiting groove 13 toward the handle 11, and the handle 11 and the quick-closing member 12 are completely in contact, and the closing is achieved at this time.

[0073] The limiting column 125 cooperates with the limiting groove 13, and when the limiting column 125 moves toward the handle 11, the limiting column 125 is Figure 10 The inner wall of the middle strip hole 130 close to the handle 11 blocks the quick-close member 12 from moving further toward the handle 11. The driving surface 112 of the handle 11 and the first self-locking surface 122 of the quick-close member 12 are in contact with each other, achieving Figure 7 Closing shown.

[0074] Depend on Figure 7 It can be seen that the driving surface 112 is arranged on the side of the moving surface 111 facing the closing direction (right side), and the first self-locking surface 122 is arranged on the side of the quick closing component 12 facing the opening direction (left side), so that the contact and abutment between the driving surface 112 and the first self-locking surface 122 can be achieved; and the first limiting surface 121 is arranged on the side of the quick closing component 12 facing the closing direction to contact the moving surface 111 of the handle 11.

[0075] In addition, in order to cooperate with the moving surface 111 of the arc surface, the first limiting surface 121 is also set to a circular arc surface; and the first self-locking surface 122 and the driving surface 112 are both set to planes, which makes it convenient for the first self-locking surface 122 to achieve translational movement along the driving surface 112; it can also make the two more closely contact and fit with the ground to achieve a stable abutment.

[0076] For the second locking structure 12B, refer to Figure 12, which includes a second self-locking surface 124 interconnected with the second limiting surface 123, and the end of the moving contact 171 facing the fast closing member 12 has an abutting surface 171a interconnected with the clamping surface 171b, such as Figure 14 As shown, the second limiting surface 123 is used to contact and cooperate with the locking surface 171b, and the second self-locking surface 124 is used to abut against the abutting surface 171a.

[0077] In the open state, if Figure 15 、 Figure 16 The limiting column 125 of the quick-close component 12 cooperates with the limiting groove 13, and the limiting column 125 of the quick-close component 12 and the inner wall of the long hole 130 in the limiting groove 13 close to the moving contact 171 are pressed and limited. At this time, the quick-close component 12 moves to the position closest to the moving contact 171, and the quick-close component 12 can no longer move toward the moving contact 171. The quick-close component 12 and the moving contact 171 have no contact. At the same time, the first limiting surface 121 of the quick-close component 12 contacts and cooperates with the moving surface 111 of the handle 11 to limit.

[0078] During the closing process, Figure 2 、 Figure 3 The handle 11 rotates clockwise, driving the moving surface 111 of the handle 11 to rotate clockwise along the first limiting surface 121 of the fast-closing member 12. At the same time, the operating mechanism 15 and the moving contact 171 are driven to rotate through the connecting rod 14, so that the engaging surface 171b of the moving contact 171 contacts the second limiting surface 123 of the fast-closing member 12; Figure 4 、 Figure 5 When the moving surface 111 and the first limiting surface 121 are about to separate, the engaging surface 171b of the moving contact 171 keeps in contact with the second limiting surface 126 of the fast closing member 12 until the two abut to limit the movement of the moving contact 171 and enter the fast closing energy storage stage; until Figure 6 、 Figure 7 The first self-locking surface 122 slides up along the driving surface 112 until the two surfaces contact, and the quick-closing member 12 moves toward the handle 11. The locking surface 171b and the second limiting surface 126 disengage to release energy, and the moving contact 171 contacts the static contact 172 to achieve closing.

[0079] After closing the circuit breaker, if you reverse the handle 11, Figure 8 、 Figure 9 The handle 11 reverses and drives the driving surface 112 to drive the first self-locking surface 122 of the quick-closing part 12 to slide down along the driving surface 112, and the quick-closing part 12 moves toward the moving contact 171. This will cause the second self-locking surface 124 of the quick-closing part 12 to abut against the abutting surface 171a of the moving contact 171, restricting the movement of the moving contact 171, making it impossible for the moving contact 171 to separate from the static contact 172, and the contact system 17 cannot be opened; and, due to the restriction of the moving contact 171, the handle 11 can no longer continue to rotate in the opposite direction to achieve the opening operation.

[0080] Figure 12 、 Figure 14 In the embodiment, the second self-locking surface 124 of the fast-assembly piece 12 and the abutting surface 171a of the movable contact 171 are both circular arc surfaces, the second self-locking surface 124 is arranged on the side of the fast-assembly piece 12 facing the closing direction, and the abutting surface 171a is arranged on the side of the fast-assembly piece 12 facing the opening direction.

[0081] The clamping surface 171b of the movable contact 171 is connected to the right upper side of the abutting surface, and the second limiting surface 123 of the fast-assembly piece 12 is connected to the left lower side of the second self-locking surface 124, so that the clamping surface 171b and the second limiting surface 123 can be in contact and slide relative to each other.

[0082] In this way, the closing self-locking of the handle 11 and the movable contact 171 after closing is achieved, and the problem of opening due to misoperation of the handle 11 is solved.

[0083] When the circuit breaker is self-locked after closing, the opening operation can be performed in an automatic opening manner because the handle 11 cannot be directly operated to drive opening. For example, under the driving of a fault state or a remote signal, the locking mechanism 16 can be automatically controlled to drive the movable contact 171 to move away from the static contact 172, and after opening, the movable contact 171 is released from the locking state of the fast-assembly piece 12, and at this time, the handle 11 can be rotated and reset.

[0084] Then, the handle 11 is rotated counterclockwise, the driving surface 112 of the handle 11 drives the second self-locking surface 124 of the fast-assembly piece 12, and the fast-assembly piece 12 moves towards the movable contact 171. Since the movable contact 171 and the static contact 172 have been separated, the second self-locking surface 124 of the fast-assembly piece 12 cannot abut against the abutting surface 171a of the movable contact 171, and the fast-assembly piece 12 can move to the cooperation point of the limiting column 125 and the limiting groove 13 close to the movable contact 171, at this time, the first self-locking surface 122 of the fast-assembly piece 12 is separated from the driving surface 112 of the handle 11, which does not affect the rotation of the handle 11 to complete unlocking and opening, and the fast-assembly piece 12 is reset by the counterclockwise rotation force of the handle 11 during opening, like Figure 16 .

[0085] Generally, the tripping mechanism includes a locking piece 160 and a tripping piece, the tripping piece is coaxially arranged with the movable contact 171 in the housing 10; the locking piece 160 and the tripping piece are separated by remote driving, the movable contact 171 can be directly driven to rotate away from the static contact 172, and opening is achieved. The specific structure of remote tripping can refer to the prior art, which will not be described here.

[0086] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit breaker characterized by, The utility model relates to a handle (11), a quick -mounting spare (12) and a contact system (17) are arranged in the shell (10), the quick -mounting spare (12) is connected with the shell (10) slidingly, one end of the quick -mounting spare (12) is used for being contacted with the handle (11), the other end is used for being contacted with the moving contact (171) of the contact system (17), after the quick -mounting spare (12) and the moving contact (171) abut, the quick -mounting spare (12) is pushed to the handle (11) in the let -out slot (113) through the moving contact (171).

2. The circuit breaker of claim 1, wherein, The one end of the quick -mounting spare (12) towards the moving contact (171) has the second limit surface (123), and the one end of the moving contact (171) towards the quick -mounting spare (12) has the clamping surface (171b) that contacts with the second limit surface (123) and cooperates; When the handle (11) rotates to the closing direction, the second limit surface (123) of the quick -mounting spare (12) contacts with the clamping surface (171b) of the moving contact (171) to limit the movement of the moving contact and store energy.

3. The circuit breaker of claim 2, wherein, The one end of the quick -mounting spare (12) towards the handle (11) has the first limit surface (121), and the one end of the handle (11) towards the quick -mounting spare (12) has the movement surface (111) that contacts with the first limit surface (121) and cooperates, and the let -out slot (113) is arranged on one side of the movement surface (111); When the handle (11) rotates to the closing direction, the movement surface (111) relatively moves along the first limit surface (121), the handle (11) rotates to the movement surface (111) and the first limit surface (121) are separated, the moving contact (171) pushes the quick -mounting spare (12) into the let -out slot (113), and the second limit surface (123) of the quick -mounting spare (12) is separated from the clamping surface (171b) of the moving contact (171) to release energy and close.

4. The circuit breaker of claim 3, wherein, The two ends of the quick -mounting spare (12) further form the first locking structure (12A) and the second locking structure (12B) respectively, the first locking structure (12A) is used for abutting with the handle (11), and the second locking structure (12B) is used for abutting with the moving contact (171) of the contact system (17), so that the handle (11) and the moving contact (171) are locked after the quick -mounting spare (12) closes respectively, and the closing self -locking of the handle (11) and the moving contact (171) is realized.

5. The circuit breaker of claim 4, wherein, The first locking structure (12A) includes the first self -locking surface (122) that is connected with the first limit surface (121), the one end of the handle (11) towards the quick -mounting spare (12) has the driving surface (112) that abuts with the first self -locking surface (122), and the driving surface is further connected with the movement surface (111) and is formed in the let -out slot (113);When the handle (11) rotates to the closing direction and the first self -locking surface (122) abuts with the driving surface (112), the contact system (17) closes.

6. The circuit breaker of claim 5, wherein, The second locking structure (12B) comprises a second self-locking surface (124) connected with the second limiting surface (123), and the moving contact (171) has an abutting surface (171a) abutting against the second self-locking surface (124) at one end of the quick coupling (12); After closing, the first self-locking surface (122) of the quick coupling (12) is driven to move relative to the driving surface (112) of the handle (11) to drive the quick coupling (12) to move towards the moving contact (171) until the second self-locking surface (124) of the quick coupling (12) abuts against the abutting surface (171a) of the moving contact (171), and the handle (11) and the moving contact (171) are self-locked at the closing position.

7. The circuit breaker of any one of claims 1 to 6, wherein, Further comprising a tripping mechanism (16) connected with the contact system (17) to drive the contact system (17) to open and unlock the quick coupling (12) under a fault state or a remote signal drive after the closing self-locking, and the handle (11) is rotated to reset; The handle (11) drives the quick coupling (12) to move towards the moving contact (171) to stop at a limiting point close to the moving contact (171), the quick coupling (12) is separated from the handle (11), and the handle (11) is rotated to achieve unlocking and opening.

8. The circuit breaker of any one of claims 1 to 6, wherein, A limiting structure is formed on the shell (10) for limiting the quick coupling (12); The limiting structure comprises a limiting groove (13) and a limiting column (125) matched with each other, the limiting groove (13) is arranged on the shell (10), and the limiting column (125) is arranged on the quick coupling (12); or the limiting groove (13) is arranged on the quick coupling (12), and the limiting column (125) is arranged on the shell (10).

9. The circuit breaker of claim 8, wherein, The limiting groove (13) is arranged on the shell (10), the limiting column (125) is arranged on the quick coupling (12), the quick coupling (12) is arranged in the limiting groove (13), a long hole (130) is formed in the limiting groove (13), and the quick coupling (12) moves in the long hole (130) through the limiting column (125) to approach or move away from the handle (11) and the moving contact (171) of the contact system (17).

10. The circuit breaker of claim 9, wherein, The shell (10) comprises a shell base (10a) and a shell cover (10b) buckled to each other, and the limiting groove (13) is arranged on the inner wall of the shell base (10a); The limiting structure further comprises a limiting block (18) arranged on the inner wall of the shell cover (10b), and the limiting block (18) abuts against a limiting surface (126) of the quick coupling (12) away from the limiting column (125).

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