Circuit breaker rear module reset mechanism

Abstract

The utility model discloses a circuit breaker rear module reset mechanism, which comprises a support, a handle, a rocker arm, a push rod and a rear module, the handle is connected with the support, the rocker arm is fixedly connected with the handle, the handle drives the circuit breaker to be switched on and switched off when doing reciprocating motion along a set range, the push rod is hinged with the support, and the rear module is connected with the push rod. The rocker arm abuts against the push rod. The rear module comprises a tripping rod and a tripping action piece. The action of the tripping action piece relative to the tripping rod comprises a lap joint position and a tripping position. According to the reset structure provided by the utility model, the contact module of the circuit breaker is linked with the rear module, and the rear module is reset synchronously from opening to closing of the circuit breaker through the handle, so that the complexity of the structure and linkage in the circuit breaker is greatly reduced, and the size of the whole product is reduced; the linkage setting of actions greatly simplifies the reset operation of each module, and brings better user experience.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers and relates to a circuit breaker rear module reset mechanism. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions and can close, carry and interrupt current under abnormal circuit conditions within a specified time.

[0003] In existing circuit breaker products, other modules are added to the contact module used for closing and opening actions to enrich the functions of the circuit breaker products. For example, a thermal magnetic module or an electronic module is added to increase the overload tripping and short-circuit tripping functions of the circuit breaker. However, the installation method of existing products is only a simple combination and superposition, and the connection between the modules is not strong. When each module needs to be reset, it often has an independent reset structure. This not only brings great complexity and inconvenience to the operation, but also the space occupied by each module and the combined structure is relatively large. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a circuit breaker rear module reset mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A circuit breaker rear module reset mechanism includes a bracket, a handle, a rocker arm, a push rod, and a rear module, the handle is connected to the bracket, the rocker arm is fixedly connected to the handle, and the handle drives the closing and opening of the circuit breaker when it reciprocates along a set range. The push rod is hinged to the bracket, and the rocker arm abuts against the push rod; the rear module includes a trip rod and a tripping action piece, and the action of the tripping action piece relative to the trip rod includes an overlapping position and a tripping position. One end of the tripping action piece is formed with a plane for abutting against the push rod. When the handle is closed, the push rod pushes the tripping action piece to the overlapping position, forming a fixed overlap with the trip rod.

[0007] Furthermore, the tripping action member is a jump buckle, which can move within a set range relative to the tripping rod. A buckle portion is provided on the tripping rod, and a overlapping portion is provided at one end of the jump buckle. In the overlapping position, the overlapping portion and the buckle portion are abutted against each other to limit the movement of the jump buckle.

[0008] Furthermore, the tripping action member is a lock buckle, which can rotate relative to the tripping rod within a set range. A hook is provided on the tripping rod. In the overlapping position, the lock buckle is against the hook to limit the movement of the lock buckle.

[0009] Furthermore, it also includes a leakage module, in which a moving iron core and a moving contact rod are provided, and the rear module is provided with a transmission part, and the two ends of the moving contact rod are respectively against the moving iron core and the transmission part. When the moving iron core is triggered by the leakage current to push the moving contact rod, the transmission part is against the trip rod, and the transmission part pushes the trip rod to rotate to trip the trip action part.

[0010] Furthermore, a central axis is provided on the bracket, and the handle is connected to the central axis and rotates relative to the bracket within a set range with the central axis as the center.

[0011] Furthermore, the push rod is respectively formed with a first end and a second end, the second end is extended toward the rear module and abuts against the tripping action member, and the first end abuts against the rocker arm.

[0012] Furthermore, an elastic member is provided on the bracket, one end of the elastic member is against the push rod, and provides a force for the push rod to maintain the against the rocker arm.

[0013] Furthermore, it also includes a micro switch, and the bracket is provided with a trigger structure for triggering the micro switch, the trigger structure includes a linkage plate and a trigger member, the linkage plate is hinged to the bracket, the handle is against the linkage plate, the trigger member is hinged to the bracket, the trigger member includes a lever and a pressure plate, the lever is connected to the linkage plate, and the pressure plate is against the micro switch.

[0014] Furthermore, a notch is provided on the linkage plate, and the end of the shift rod is located in the notch.

[0015] In summary, the benefits of the present invention are:

[0016] The reset structure provided by the utility model links the circuit breaker contact module with the rear module, so that the rear module can be reset synchronously during the opening and closing action of the circuit breaker by the handle, which greatly reduces the complexity of the internal structure and linkage of the circuit breaker and reduces the volume of the overall product. The linkage setting of the action greatly simplifies the operation of resetting each module and brings a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a circuit breaker of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the middle contact module and the rear module.

[0019] Figure 3 for Figure 2 Schematic diagram of the structure of the middle handle part.

[0020] Figure 4 for Figure 2 Schematic diagram of the structure of the middle and rear modules.

[0021] Figure 5 for Figure 4 Schematic diagram of the cross-section structure in.

[0022] Figure 6 for Figure 2 Schematic diagram of the structure of the contact module and the rear module in some other embodiments.

[0023] Figure 7 for Figure 6 Schematic diagram of the structure of the middle and rear modules.

[0024] Figure 8 for Figure 6 Schematic diagram of the cross-section structure when the middle handle is closed.

[0025] Figure 9 for Figure 6 Schematic diagram of the structure of the rear module and leakage module.

[0026] Figure 10 It is a structural diagram of the trigger structure.

[0027] Markings in the figure: 1. bracket; 2. handle; 21. center axis; 3. rocker arm; 31. paddle; 4. push rod; 41. first end; 42. second end; 43. elastic member; 5. rear module; 51. trip rod; 511. buckle portion; 512. joint portion; 513. hook; 514. baffle; 52. jump buckle; 521. overlapping portion; 52', lock; 53. top spring; 54. push rod; 541. groove; 54', rocker; 61. micro switch; 62. linkage plate; 621. notch; 631. paddle; 632. pressure plate; 7. dynamic contact rod. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed arbitrarily, and the component layout type may also be more complicated.

[0030] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the perpendicular relationship may actually be an approximately perpendicular relationship.

[0032] This embodiment provides a reset mechanism for actively resetting a rear module 5 in a circuit breaker. The rear module 5 includes but is not limited to a thermal-magnetic rear module 5 and an electronic rear module 5. The reset mechanism is disposed on a handle 2 in a contact module of the circuit breaker and is linked to the closing action of the handle 2 to ensure that the closing action of the handle 2 synchronously resets the rear module 5.

[0033] Specifically, refer to Figure 1 and Figure 2 The reset mechanism includes a bracket 1, and a central axis 21 is provided on the handle 2. The central axis 21 is connected to the bracket 1, so that the handle 2 can rotate and swing back and forth within a certain range relative to the bracket 1 with the central axis 21 as the center. The handle 2 can respectively realize the closing and opening of the circuit breaker at both sides of the movement range.

[0034] Reference Figure 2 and Figure 4 A trip rod 51 and a trip latch 52 are provided in the rear module 5, wherein the trip rod 51 is a straight rod structural component, and the two ends of the trip rod 51 in the axial direction are respectively rotatably connected to the rear module 5, so that the trip rod 51 can rotate around its own axis, and a torsion spring is provided on the trip rod 51 to maintain the trip rod 51 in the initial set position in the circumferential direction and generate torque when the trip rod 51 rotates.

[0035] The trip buckle 52 is arranged on one side of the trip rod 51, and a groove for passing the trip buckle 52 is formed in the rear module 5, so that the trip buckle 52 can perform a linear reciprocating motion within a certain range along its own axis. A trip spring is axially sleeved on the trip buckle 52, and the trip spring provides elastic force on one side of the axial direction to the trip buckle 52.

[0036] A latch portion 511 is provided on the outer periphery of the trip rod 51, and the latch portion 511 is extended radially along the trip rod 51. A overlap portion 521 is provided on one end of the trip latch 52 facing the trip rod 51. When the trip rod 51 is not subjected to other external forces and is only in a position maintained by the torsion spring, the trip latch 52 moves toward the side of the trip rod 51 and compresses the trip spring. When it moves to the set position, the overlap portion 521 can overlap with the latch portion 511, wherein the latch portion 511 is formed in a step form to resist the trip latch 52 in the moving direction of the trip latch 52, so that it cannot move and maintains the compressed state of the trip spring. In this overlap state, the rear module 5 is reset and connected.

[0037] When the trip rod 51 rotates under the triggering of any abnormal state such as overload, short circuit, leakage current, etc., the latch portion 511 moves away from the overlapping portion 521 as the trip rod 51 rotates, thereby being disconnected from the overlapping portion 521. After the trip latch 52 loses its restriction, it is moved and popped out toward the end away from the trip rod by the elastic force of the trip spring, so that one end of the trip latch 52 contacts the parts acting on the contact module, driving the contact module to open.

[0038] In another embodiment, referring to Figure 6 and Figure 7 The rear module 5 is provided with a trip rod 51 and a lock 52', and the trip rod 51 and the lock 52' include a contact state and a separation state, which correspond to the reset connection and disconnection of the circuit of the rear module 5 respectively. The trip rod 51 is a straight rod structural component, which is rotatable and has a hook 513 provided in the radial direction. One end of the lock 52' is hinged to the rear module 5 so that the lock 52' can rotate within a certain range. The other end of the lock 52' is formed with a hook portion that overlaps with the hook 513, and a top spring 53 is also provided. One end of the top spring 53 is connected to the lock 52'. When the hook portion is disengaged from the hook 513, the top spring 53 forms an elastic force on the lock 52' for driving the lock 52' away from the hook 513, and at the same time drives the lock 52' to act on the parts on the contact module, driving the contact module to open.

[0039] The reset mechanism also includes a rocker arm 3 and a push rod 4. Figure 3 One end of the rocker arm 3 is connected to the central axis 21, and the other end is fixed to the handle 2. When the handle 2 is moved, the rocker arm 3 is synchronously driven to rotate around the central axis 21. A paddle 31 is provided on the rocker arm 3.

[0040] One end of the push rod 4 is hinged to the bracket 1, and the two ends of the push rod 4 that are radially farther away from the hinged end are respectively formed as a first end 41 and a second end 42, wherein the second end 42 is used to abut against the jump buckle 52 / the lock buckle 52', and the first end 41 extends toward the side of the handle 2 and abuts against the paddle 31. An elastic member 43 is also provided on the bracket 1, and one end of the elastic member 43 abuts against the push rod 4 and applies a force to the push rod 4 to keep the first end 41 against the paddle 31. The elastic member 43 includes but is not limited to a spring, a torsion spring and the like.

[0041] The handle 2 is in the open position and the rear module 5 is in the tripped state. When the rear module 5 is released from abnormal conditions such as overload, short circuit, leakage current, etc., the trip rod 51 is reset to the initial setting position under the action of the torsion spring. At this time, the buckle portion 511 / the hook 513 is reset synchronously, and the handle 2 is switched from the open position to the closed position. Figure 5 or Figure 8 The action of the rocker arm 3 pushes the push rod 4 to rotate through the paddle 31 and the first end 41, and then pushes the trip buckle 52 / the lock buckle 52' toward the direction of the trip rod 51 through the second end 42, so that the trip buckle 52 forms an overlap with the buckle portion 511 / the lock buckle 52' forms an overlap with the hook 513.

[0042] When the rear module 5 has not yet eliminated the abnormal state such as overload, short circuit, leakage current, etc., the trip rod 51 will still be restricted and cannot be reset to the initial setting position. At this time, under the pushing action of the push rod 4, the overlapping end of the trip buckle 52 / the lock buckle 52' cannot form an overlap with the buckle end / the hook of the lock buckle 52' cannot form an overlap with the hook 513, thereby achieving the effect that the closing action of the handle 2 cannot drive the reset of the rear module 5 when the abnormal state is not eliminated.

[0043] Furthermore, a leakage module is provided on one side of the rear module 5, and the leakage module includes a moving iron core, a moving contact rod 7 and a transmission rod. A coil is provided outside the moving iron core. When leakage current occurs in the leakage module, the coil will generate a magnetic field that drives the moving iron core to pop out axially. The moving contact rod 7 is set in the pop-up direction of the moving iron core. When the moving iron core pops out, the moving iron core collides with the moving contact rod 7, thereby promoting the movement of the moving contact rod 7.

[0044] In some embodiments, reference Figure 1 and Figure 4The transmission rod is a push rod 54 that moves in a linear direction. One end of the push rod 54 is against the dynamic contact rod 7. When the dynamic contact rod 7 moves under the push of the moving iron core, the push rod 54 is pushed in the same direction. A groove 541 is provided on the push rod 54. A coupling portion 512 for extending into the groove 541 is provided on the outer periphery of the trip rod 51. The coupling portion 512 is extended along the radial direction of the trip rod 51. The rotation of the trip rod 51 drives the synchronous rotation of the coupling portion 512.

[0045] When leakage current occurs in the leakage module, the moving iron core pushes the moving contact rod 7 to move, and the moving contact rod 7 pushes the push rod 54 to move, so that the inner wall of the groove 541 abuts against the joint 512 and pushes the joint 512 to rotate, thereby driving the rotation of the tripping rod 51 and causing the tripping buckle 52 / the locking buckle 52' to trip.

[0046] When the leakage current anomaly in the leakage module is eliminated, the moving iron core is reset, and the moving contact rod 7 can also be reset by a reset spring or other structure, so that the top rod 54 is no longer pressed by the passive contact rod 7, and then the trip rod 51 can be rotated and reset under the action of the torsion spring, and the transmission rod is driven to move and reset through the joint 512.

[0047] In other embodiments, referring to Figure 8 and Figure 9 The transmission rod is a rocker 54' that rotates along a set center. One end of the rocker 54' is hinged in the rear module 5, so that the rocker 54' can rotate along the hinge axis. When the movable contact rod 7 is pushed by the moving iron core, the movable contact rod 7 will resist the rocker 54' and promote the rotation of the rocker 54'. A baffle 514 is provided on the outer periphery of the trip rod 51. The baffle 514 is extended along the radial direction of the trip rod 51, and the baffle 514 resists the rocker 54' in the rotation direction of the rocker 54'.

[0048] When leakage current occurs in the leakage module, the moving iron core pushes the moving contact rod 7 to move, and the moving contact rod 7 pushes the rocker 54' to rotate. The rocker 54' abuts against the baffle 514, thereby driving the trip rod to rotate, causing the trip buckle 52 / the lock buckle 52' to trip.

[0049] When the leakage current abnormality in the leakage module is eliminated, the moving iron core is reset, and the moving contact rod 7 can also be reset by a reset spring or other structure, so that the rocker 54' is no longer pressed by the passive contact rod 7, and then the trip rod 51 can be rotated and reset under the action of the torsion spring, and the rocker 54' is driven to rotate and reset through the baffle 514.

[0050] Furthermore, in order to enable the user to know the current status more intuitively during the closing and opening operations, the circuit breaker is also provided with an indicator device, which may include an indicator light, the on and off of the indicator light is used to represent the closing and opening status, and a micro switch 61 is also provided for triggering the on and off of the indicator light, and the micro switch 61 is triggered by a trigger structure.

[0051] Reference Figure 10 The trigger structure includes a trigger member and a linkage plate 62. The linkage plate 62 is hinged to the bracket 1 and can rotate relative to the bracket 1. The handle 2 is provided with an abutment portion for abutting against the linkage plate 62. When the handle 2 moves toward the closing position, the abutment portion abuts against the linkage plate 62 and promotes the rotation of the linkage plate 62. A reaction spring is also provided in the bracket 1. When the handle 2 moves toward the opening position, the abutment portion disengages from the linkage plate 62, and the linkage plate 62 is reset by the action of the reaction spring.

[0052] The trigger member is connected to the bracket 1 through a rotating shaft and can rotate around the rotating shaft. A lever 631 is provided on one side of the trigger member along the radial direction of the rotating shaft, and a pressure plate 632 is provided on the other side. The end of the lever 631 is connected to the linkage plate 62, and the pressure plate 632 is against the action part of the micro switch 61. When the linkage plate 62 rotates, the trigger member is driven to rotate by the lever 631, so that the pressure plate 632 is against the action part of the micro switch 61 to trigger the micro switch 61, and then the micro switch 61 generates a trigger signal, triggering the indicator light to be on or off, thereby displaying the current closing state.

[0053] The connection between the lever 631 and the linkage plate 62 includes: a notch 621 is provided on the linkage plate 62 for the end of the lever 631 to extend into; during the rotation of the linkage plate 62, the inner wall of the notch 621 abuts against the lever 631 to drive the movement of the lever 631; the size of the notch 621 is slightly larger than the end of the lever 631, so that the end of the lever 631 has a certain amount of movable margin relative to the notch 621 to avoid jamming.

[0054] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A circuit breaker rear module reset mechanism, characterized in that: The invention comprises a bracket (1), a handle (2), a rocker arm (3), a push rod (4), and a rear module (5); the handle (2) is connected to the bracket (1); the rocker arm (3) is fixedly connected to the handle (2); the handle (2) drives the closing and opening of the circuit breaker when it reciprocates along a set range; the push rod (4) is hinged to the bracket (1); the rocker arm (3) and the push rod (4) abut against each other; the rear module (5) comprises a tripping rod (51) and a tripping action piece; the action of the tripping action piece relative to the tripping rod (51) includes an overlap position and a tripping position; one end of the tripping action piece is formed with a plane for abutting against the push rod (4); when the handle (2) closes, the push rod (4) pushes the tripping action piece to the overlap position, forming a fixed overlap with the tripping rod (51).

2. A circuit breaker rear module reset mechanism according to claim 1, characterized in that: The tripping action member is a tripping buckle (52), and the tripping buckle (52) can move within a set range relative to the tripping rod (51). The tripping rod (51) is provided with a buckle portion (511), and one end of the tripping buckle (52) is provided with a lap portion (521). In the lap position, the lap portion (521) abuts against the buckle portion (511), thereby limiting the movement of the tripping buckle (52).

3. A circuit breaker rear module reset mechanism according to claim 1, characterized in that: The tripping action member is a lock buckle (52'), which can rotate relative to the tripping rod (51) within a set range. The tripping rod (51) is provided with a hook (513). In the overlapped position, the lock buckle (52') and the hook (513) are abutted against each other to limit the movement of the lock buckle (52').

4. A circuit breaker rear module reset mechanism according to any one of claims 1 to 3, characterized in that: The invention also includes a leakage current module, wherein a moving iron core and a moving contact rod (7) are provided in the leakage current module, and the rear module (5) is provided with a transmission member, and the two ends of the moving contact rod (7) are respectively against the moving iron core and the transmission member, and when the moving iron core is triggered by the leakage current to push the moving contact rod (7), the transmission member is against the tripping rod (51), and the transmission member pushes the tripping rod (51) to rotate so as to trip the tripping action member.

5. The circuit breaker rear module reset mechanism according to claim 1, characterized in that: The bracket (1) is provided with a central axis (21), and the handle (2) is connected to the central axis (21) and rotates within a set range relative to the bracket (1) with the central axis (21) as the center.

6. The circuit breaker rear module reset mechanism according to claim 1, characterized in that: The push rod (4) is respectively formed with a first end (41) and a second end (42), the second end (42) extending toward the rear module (5) and abutting against the tripping action member, and the first end (41) abutting against the rocker arm (3).

7. A circuit breaker rear module reset mechanism according to claim 6, characterized in that: An elastic member (43) is provided on the bracket, one end of the elastic member (43) abuts against the push rod and provides a force for the push rod (4) to maintain abutment with the rocker arm (3).

8. The circuit breaker rear module reset mechanism according to claim 1, characterized in that: The invention also includes a micro switch (61), wherein a trigger structure for triggering the micro switch (61) is provided on the bracket (1), wherein the trigger structure includes a linkage plate (62) and a trigger member, wherein the linkage plate (62) is hinged to the bracket (1), the handle (2) and the linkage plate (62) are in contact with each other, and the trigger member is hinged to the bracket (1), wherein the trigger member includes a shifting rod (631) and a pressing plate (632), wherein the shifting rod (631) is connected to the linkage plate (62), and the pressing plate (632) and the micro switch (61) are in contact with each other.

9. The circuit breaker rear module reset mechanism according to claim 8, characterized in that: A notch (621) is provided on the linkage plate (62), and the end of the shifting rod (631) is located in the notch (621).

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