Circuit breaker

Abstract

The utility model provides a circuit breaker, which comprises at least a first pole conducting circuit and a second pole conducting circuit, and is characterized in that the first pole conducting circuit comprises a first overcurrent release, and the second pole conducting circuit comprises a second overcurrent release. Both the first overcurrent tripper and the second overcurrent tripper can actuate a rotating piece to generate rotating motion, the rotating motion of the rotating piece can actuate a contact system to execute disconnection action, and the rotating motion of the rotating piece simultaneously actuates a moving contact and a static contact of each phase line to realize disconnection. Therefore, conducting circuits of all phases are disconnected at the same time, the circuit breaker works more reliably, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an improvement of a circuit breaker separation and combination linkage structure. Background Art

[0002] The existing circuit breakers used at the incoming end of the distribution box are usually two-pole circuit breakers, one pole is connected to the A-phase power line, and the other pole is connected to the B-phase power line. Such circuit breakers are usually provided with a contact drive mechanism and a contact mechanism, wherein the contact mechanism includes a moving contact and a static contact, and the contact drive mechanism is used to drive the moving contact and the static contact to contact or separate, so that the circuit breaker can achieve the corresponding connection or disconnection function based on the contact or separation of the moving contact and the static contact. Overcurrent releases are provided on the two-phase conductive circuits of the bipolar circuit breaker to disconnect the two-phase circuits at the same time when a short circuit or excessive current occurs. However, the respective overcurrent releases on the two-phase conductive circuits are usually arranged at intervals and have a certain distance. Therefore, it is necessary to propose a new linkage structure so that the overcurrent release on any phase circuit of the two-phase conductive circuit can directly or linkage-actuate the contact system when it is actuated, so that the contact systems of the two-phase circuits are disconnected at the same time. Utility Model Content

[0003] Therefore, in view of at least one of the above problems, the utility model provides a circuit breaker.

[0004] The utility model is implemented by the following scheme:

[0005] The utility model provides a circuit breaker, comprising at least a first-pole conductive circuit and a second-pole conductive circuit, characterized in that the first-pole conductive circuit comprises a first overcurrent release, the second-pole conductive circuit comprises a second overcurrent release, the first overcurrent release and the second overcurrent release can both actuate a rotating member to generate rotational motion, and the rotational motion of the rotating member can actuate a contact system to perform a disconnection action.

[0006] In one embodiment, the first overcurrent release and the second overcurrent release are arranged at intervals on two opposite sides, the rotating member is arranged on a side close to the first overcurrent release, the first overcurrent release directly acts on the rotating member through mechanical coupling to cause it to rotate, and the second overcurrent release acts on the rotating member through a transmission system transmission coupling to cause it to rotate.

[0007] In one embodiment, the first overcurrent release and the second overcurrent release are both eccentrically connected to the rotating member through a pushing member to achieve coupling effect on the rotating member to cause it to generate rotational motion.

[0008] In one embodiment, the rotating member is connected to a first pushing block as the pushing member, the first pushing block is connected to an eccentric position of the rotating member, and the first pushing block is arranged opposite to the first overcurrent releaser.

[0009] In one embodiment, the transmission system is a multi-link linkage mechanism.

[0010] In one embodiment, the rotating member is connected to a second pushing block as the pushing member, the second pushing block is connected to an eccentric position of the rotating member, the second overcurrent release acts on the multi-link linkage mechanism, and actuates the rotating member through the multi-link linkage mechanism.

[0011] In one embodiment, the multi-link linkage mechanism includes a support member, a traction rod and a connecting rod, the support member is fixedly arranged, the middle part of the traction rod is hinged to the end of the support member, so that the traction rod can swing around the middle hinge point, the first end of the traction rod is arranged opposite to the second overcurrent releaser, the second end of the traction rod is hinged to the first end of the connecting rod, and the second end of the connecting rod is hinged to the second push block.

[0012] In one embodiment, the contact system includes a first contact system and a second contact system, the first-pole conductive circuit and the second-pole conductive circuit respectively include the first contact system and the second contact system, the first contact system includes a first moving contact and a first stationary contact; the second contact system includes a second moving contact and a second stationary contact, the first contact system and the second contact system are both located between the first-pole conductive circuit and the second-pole conductive circuit, and the first contact system and the second contact system are oriented in opposite directions.

[0013] In one embodiment, the rotational movement of the rotating member can actuate the contact system so that the first moving contact and the second moving contact move in opposite directions, thereby causing the first contact system and the second contact system to be disconnected synchronously.

[0014] In one embodiment, the first contact system and the second contact system have a first breaking motion trajectory and a second breaking motion trajectory respectively, the first static contact is located on the top of the first moving contact, and the second moving contact is located on the top of the second static contact, so that the movement direction of the first breaking motion trajectory is opposite to the movement direction of the second breaking motion trajectory.

[0015] In one embodiment, the circuit breaker further includes an operating mechanism, which is laterally mounted on the first contact system and the second contact system, and the operating mechanism can simultaneously actuate the first moving contact and the second moving contact to move in opposite directions, thereby manipulating the first contact system and the second contact system to be synchronously connected or disconnected.

[0016] The technical solution provided by the utility model has the following technical effects:

[0017] The utility model provides a circuit breaker, a circuit breaker, comprising at least a first-pole conductive circuit and a second-pole conductive circuit, characterized in that the first-pole conductive circuit comprises a first overcurrent release, the second-pole conductive circuit comprises a second overcurrent release, the first overcurrent release and the second overcurrent release can both actuate a rotating member to generate a rotational motion, the rotational motion of the rotating member can actuate a contact system to perform a disconnection action, so that the overcurrent release on any phase circuit of each phase conductive circuit can directly or in linkage act on the contact system when it generates an action, thereby improving the safety of the electrical system. In particular, it is particularly used in a double-pole circuit breaker, and the movable contact and the static contact of each phase circuit are simultaneously actuated by the rotational motion of the rotating member to achieve disconnection, so that each phase conductive circuit is disconnected at the same time, so that the circuit breaker works more reliably and improves safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional diagram of a double-pole circuit breaker of this embodiment;

[0019] Figure 2 is a three-dimensional diagram of the first conductive circuit and the second conductive circuit of this embodiment;

[0020] Figure 3 is a front view of the first and second conductive circuits of this embodiment;

[0021] Figure 4 is a three-dimensional diagram of a double-pole circuit breaker of this embodiment;

[0022] Figure 5 It is a three-dimensional diagram of the installation of the operating mechanism, multi-link linkage mechanism, overcurrent release and rotating member of this embodiment;

[0023] Figure 6 is a front view of the installation of the operating mechanism, the multi-link linkage mechanism and the rotating member of this embodiment;

[0024] Figure 7 is a three-dimensional diagram of the installation of the multi-link linkage mechanism and the rotating member of this embodiment;

[0025] Figure 8 It is a front view of the installation of the multi-link linkage mechanism and the rotating member of this embodiment. DETAILED DESCRIPTION

[0026] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0028] like Figure 1-7 As shown, this embodiment provides a bipolar circuit breaker, whose two poles are connected to phase A and phase B respectively, and the bipolar circuit breaker includes an outer shell 30, and the outer shell 30 includes a base 31 and a middle frame 32, and may also include an upper cover (not shown) installed above the middle frame 32; the handle of the circuit breaker operating mechanism 40 is exposed from the outer shell 30, so as to facilitate manual execution of the circuit breaker. The bipolar circuit breaker also includes a first-pole conductive circuit and a second-pole conductive circuit, and the first-pole conductive circuit (connected to phase A) includes a first incoming terminal 11 (the first incoming terminal 11 includes a first incoming terminal seat 111 and a first conductive copper bus 112 that are fixedly electrically connected together), a first front flexible connection 14, a first overcurrent release 15, a first rear flexible connection 16, a first contact system 17 and a first outgoing terminal 12 connected in sequence. The second pole conductive circuit (connected to phase B electricity) includes a second incoming line terminal 21 (the second incoming line terminal 21 includes a second incoming line terminal seat 211 and a second conductive copper bus 212 fixedly electrically connected together), a second contact system 24, a second front flexible connection 25, a second overcurrent release 26, a second rear flexible connection 27 and a second outgoing line terminal 22 connected in sequence.

[0029] like Figure 1-3 As shown, the first-pole conductive line and the second-pole conductive line are extended and arranged in the outer shell 30. The first inlet terminal 11, the first outlet terminal 12, the second inlet terminal 21 and the second outlet terminal 22 are all exposed from the outer shell 30 to facilitate wiring. The first inlet terminal 11 and the second inlet terminal 21 correspond to the first outlet terminal 12 and the second outlet terminal 22, respectively, that is, the first inlet terminal 11 is arranged correspondingly to the first outlet terminal 12, and the second inlet terminal 21 is arranged correspondingly to the second outlet terminal 22. The first inlet terminal 11 and the first outlet terminal 12 are located on the same side relative to the second inlet terminal 21 and the second outlet terminal 22, respectively, so that the first-pole conductive line and the second-pole conductive line are extended and arranged in parallel in the outer shell 30.

[0030] like Figure 1-3As shown, the first contact system 17 and the second contact system 24 are arranged in parallel and transversely in the outer shell 30, and the first contact system 17 and the second contact system 24 are in opposite directions. In this embodiment, the first contact system 17 and the second contact system 24 are roughly in the span range between the first outlet terminal 12 and the second outlet terminal 22. The first contact system 17 and the second contact system 24 are arranged in parallel and each faces a different side, which can make full use of the width space between the first outlet terminal 12 and the second outlet terminal 22 to arrange the contact system and the operating mechanism 40, further reducing the volume of the circuit breaker.

[0031] The first contact system 17 includes a first moving contact 171 and a first stationary contact 172; the second contact system 24 includes a second moving contact 241 and a second stationary contact 242. The first contact system 17 and the second contact system 24 respectively have a first breaking motion trajectory and a second breaking motion trajectory. Specifically, the first moving contact 171 has a first breaking motion trajectory relative to the first stationary contact 172, and the second moving contact 241 has a second breaking motion trajectory relative to the second stationary contact 242, so as to realize the disconnection and conduction of the first-pole conductive circuit and the second-pole conductive circuit.

[0032] The movement direction of the first breaking motion trajectory is opposite to the movement direction of the second breaking motion trajectory. The first static contact 172 is located on the top of the first moving contact 171, and the second moving contact 241 is located on the top of the second static contact 242, so that the movement direction of the first breaking motion trajectory is opposite to the movement direction of the second breaking motion trajectory.

[0033] The first overcurrent release 15 and the second overcurrent release 26 can be a bimetallic member or an electromagnetic armature assembly or a combination of a bimetallic member and an electromagnetic armature assembly. The first overcurrent release 15 and the second overcurrent release 26 are arranged at intervals on opposite sides, and the rotating member 51 is arranged on a side close to the first overcurrent release 15. Both the first overcurrent release 15 and the second overcurrent release 26 can actuate the rotating member 51 to produce a rotational motion, and the rotational motion of the rotating member 51 can actuate the first moving contact 171 and the second moving contact 241 to move in opposite directions, thereby manipulating the first contact system 17 and the second contact system 24 to disconnect synchronously, and the moving contacts and the static contacts of the two-phase lines are actuated by the rotational motion of the rotating member 51 to disconnect at the same time, so that the two-phase conductive lines are disconnected at the same time, making the circuit breaker work more reliable and improving safety.

[0034] like Figure 4-7As shown, the first overcurrent release 15 directly acts on the rotating member 51 through mechanical coupling to make it rotate. Specifically, the rotating member 51 is connected to a first push block 511, and the first push block 511 is connected to the eccentric position of the rotating member 51. The push block 511 is arranged opposite to the first overcurrent release 15. When a short circuit or excessive current occurs, the first overcurrent release 15 is actuated and pushes the first push block 511. The action direction of the first overcurrent release 15 is as shown in FIG. Figure 6 As shown by the middle arrow A, the first push block 511 is pushed to make the rotating member 51 generate a rotational motion, and the rotational motion of the rotating member 51 can simultaneously actuate the first moving contact 171 and the second moving contact 241 to move in opposite directions, thereby manipulating the first contact system 17 and the second contact system 24 to disconnect synchronously. In other embodiments, the first push block 511 can also be, for example, a rod-shaped structure. Or in other embodiments, the first overcurrent release 15 can actuate the rotating member 51 through a matching structure of a gear rack.

[0035] The second overcurrent release 26 acts on the rotating member 51 through the transmission coupling of the transmission system to make it rotate. Specifically, the rotating member 51 is also connected to a second push block 512, and the second push block 512 is connected to the eccentric position of the rotating member 51. The second overcurrent release 26 acts on the multi-link linkage mechanism 60 and actuates the rotating member 51 through the multi-link linkage mechanism 60. The action direction of the second overcurrent release 26 is as follows: Figure 6 As shown by the middle arrow B. The multi-link linkage mechanism 60 includes a support member 61, a traction rod 62 and a linkage rod 63. The support member 61 is fixedly arranged, and the middle part of the traction rod 62 is hinged to the end of the support member 61, so that the traction rod 62 can swing around the middle hinge point. The first end of the traction rod 62 is arranged opposite to the second overcurrent release 26. The second end of the traction rod 62 is hinged to the first end of the linkage rod 63. The second end of the linkage rod 63 is hinged to the second push block 512. When a short circuit or excessive current occurs, the second overcurrent release 26 is activated and pushes the first end of the traction rod 62, causing the traction rod 62 to swing, and the second end of the traction rod 62 moves in the opposite direction and pulls the linkage rod 63, which drives the second push block 512 to move, causing the rotating member 51 to rotate, and the rotation of the rotating member 51 simultaneously drives the first moving contact 171 and the second moving contact 241 to move in opposite directions, thereby operating the first contact system 17 and the second contact system 24 to disconnect synchronously. In other embodiments, the second push block 512 can also be, for example, a rod-shaped structure. Or in other embodiments, the second overcurrent release 26 can act on the rotating member 51 through a multi-stage gear set as a transmission system transmission coupling to cause it to rotate.

[0036] like Figure 1 , 4-6, the operating mechanism 40 is transversely mounted on the first contact system 17 and the second contact system 24, and is used to manipulate the movement of the first contact system 17 and the second contact system 24. The operating mechanism 40 can actuate the first moving contact 171 and the second moving contact 241 to move in opposite directions, thereby manipulating the first contact system 17 and the second contact system 24 to be synchronously connected or disconnected. In this way, the operating mechanism 40 can simultaneously actuate the first contact system 17 and the second contact system 24, and the arrangement is compact, thereby improving the miniaturization of the product.

[0037] Although this embodiment is described by taking the linkage tripping structure applied to a bipolar circuit breaker as an example, the linkage tripping structure can also be used as a linkage tripping structure in a multi-pole circuit breaker to achieve the tripping of multi-pole lines because the linkage enables the tripping of each line at the same time. For example, the linkage tripping structure can be used in two-pole lines of a three-pole circuit breaker to achieve the tripping of the two-pole lines or to achieve the tripping of the three-pole lines through linkage; or the tripping of the third-pole line can be achieved through the action of the overcurrent release of the two-pole lines.

[0038] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A circuit breaker, comprising at least a first conductive line and a second conductive line, characterized in that: The first-pole conductive circuit includes a first overcurrent release, and the second-pole conductive circuit includes a second overcurrent release. Both the first overcurrent release and the second overcurrent release can actuate a rotating member to generate rotational motion, and the rotational motion of the rotating member can actuate the contact system to perform a disconnection action.

2. The circuit breaker according to claim 1, characterized in that: The first overcurrent release and the second overcurrent release are arranged at intervals on two opposite sides, the rotating member is arranged on a side close to the first overcurrent release, the first overcurrent release directly acts on the rotating member through mechanical coupling to cause it to rotate, and the second overcurrent release acts on the rotating member through a transmission system transmission coupling to cause it to rotate.

3. The circuit breaker according to claim 2, characterized in that: The first overcurrent release and the second overcurrent release are both eccentrically connected to the rotating member through a pushing member to achieve coupling action on the rotating member to cause it to generate rotational motion.

4. The circuit breaker according to claim 3, characterized in that: The rotating member is connected to a first pushing block as the pushing member, the first pushing block is connected to an eccentric position of the rotating member, and the first pushing block is arranged opposite to the first overcurrent releaser.

5. The circuit breaker according to claim 3, characterized in that: The transmission system is a multi-link linkage mechanism.

6. The circuit breaker according to claim 5, characterized in that: The rotating member is connected to a second pushing block as the pushing member, the second pushing block is connected to an eccentric position of the rotating member, the second overcurrent release acts on the multi-link linkage mechanism, and actuates the rotating member through the multi-link linkage mechanism.

7. The circuit breaker according to claim 6, characterized in that: The multi-link linkage mechanism includes a support member, a traction rod and a connecting rod. The support member is fixedly arranged, and the middle part of the traction rod is hinged to the end of the support member so that the traction rod can swing around the middle hinge point. The first end of the traction rod is arranged opposite to the second overcurrent releaser, the second end of the traction rod is hinged to the first end of the connecting rod, and the second end of the connecting rod is hinged to the second push block.

8. The circuit breaker according to claim 1, characterized in that: The contact system includes a first contact system and a second contact system, the first-pole conductive circuit and the second-pole conductive circuit respectively include the first contact system and the second contact system, the first contact system includes a first moving contact and a first stationary contact; the second contact system includes a second moving contact and a second stationary contact, the first contact system and the second contact system are both located between the first-pole conductive circuit and the second-pole conductive circuit, and the first contact system and the second contact system are oriented in opposite directions.

9. The circuit breaker according to claim 8, characterized in that: The rotational movement of the rotating member can actuate the contact system so that the first moving contact and the second moving contact move in opposite directions, thereby causing the first contact system and the second contact system to be opened synchronously.

10. The circuit breaker according to claim 8, characterized in that: The first contact system and the second contact system respectively have a first breaking motion trajectory and a second breaking motion trajectory, the first static contact is located on the top of the first moving contact, and the second moving contact is located on the top of the second static contact, so that the movement direction of the first breaking motion trajectory is opposite to the movement direction of the second breaking motion trajectory.

11. The circuit breaker according to claim 8, characterized in that: The circuit breaker also includes an operating mechanism, which is transversely mounted on the first contact system and the second contact system. The operating mechanism can simultaneously actuate the first moving contact and the second moving contact to move in opposite directions, thereby manipulating the first contact system and the second contact system to be synchronously connected or disconnected.

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