Circuit breaker

Abstract

A circuit breaker includes: a circuit breaker module having an operating handle, a breaking unit and a tripping unit, in a closed position, a moving contact is in contact with a static contact, in an open position, the moving contact is separated from the static contact, and the circuit breaker module can be switched to a tripping state under the action of the tripping unit; the transmission assembly is connected to the operating handle to actuate the operating handle to move or is actuated by the operating handle, and when the moving contact is in the off position, the transmission assembly is in a first state; when the moving contact is in the closed position, the transmission assembly is in a third state; and when the circuit breaker module is triggered to release, the transmission assembly is driven to the second state.

Description

Technical Field

[0001] The utility model relates to a circuit breaker, and more particularly to a circuit breaker capable of accurately indicating a state of the circuit breaker. Background Art

[0002] The circuit breaker can switch between the closed state and the open state to control the conduction and disconnection of the circuit. In order to improve the safety performance of the circuit breaker, a trip unit can be provided in the circuit breaker, so that in the event of an unexpected situation, the trip unit can trigger the tripping operation of the circuit breaker, thereby automatically cutting off the circuit to protect the circuit. However, in the prior art, the user may not be able to conveniently determine whether the circuit breaker is in the tripped state.

[0003] Therefore, it is desired to provide a circuit breaker to improve the defects of the above-mentioned prior art. Utility Model Content

[0004] According to one aspect of the utility model, a circuit breaker is proposed, comprising: a circuit breaker module, having an operating handle, a disconnecting unit and a tripping unit, the disconnecting unit comprising a moving contact and a stationary contact, the moving contact being configured to move between a closed position and an open position under the action of the operating handle, in the closed position, the moving contact is in contact with the stationary contact, in the open position, the moving contact is separated from the stationary contact, and the circuit breaker module can be switched to a tripping state under the action of the tripping unit; a transmission assembly, comprising: a slider, connected to the operating handle to actuate the operating handle to move or to be actuated by the operating handle to move linearly, the slider having a groove; a roller having a protrusion, the protrusion extending into the groove to actuate the slider or to be actuated by the slider to rotate and move; wherein the roller can rotate between a first position, a second position and a third position, when the moving contact is in the open position, the roller is in the first position, and when the moving contact is in the closed position, the roller is in the third position; wherein, when the circuit breaker module is triggered to trip, the roller rotates and moves from the third position to the second position.

[0005] According to this solution, the tripping action of the tripping unit in the circuit breaker module is associated with the position of the roller, so the user can observe the position of the roller (or a mechanical indicator that moves synchronously with the roller) to help the user clearly know whether the circuit breaker is in a tripped state.

[0006] In some schemes, the circuit breaker may further include a pre-charge switch module, which is installed to the circuit breaker module, and the pre-charge switch module has a pre-charge moving contact and a pre-charge static contact, and the pre-charge moving contact is configured to move between a pre-charge closed position and a pre-charge disconnected position. In the pre-charge closed position, the pre-charge moving contact is in contact with the pre-charge static contact, and in the pre-charge disconnected position, the pre-charge moving contact is separated from the pre-charge static contact; the roller can also rotate to a fourth position, and when the pre-charge moving contact is in contact with the pre-charge static contact, the roller is in the fourth position.

[0007] In some embodiments, when the roller is in the fourth position, the roller is at a dead point and cannot be actuated by the slider; when the roller is in the third position, the roller is not at a dead point and can be actuated by the slider.

[0008] According to the solution, when the circuit is operating normally, the circuit breaker is in the closed state, and the roller is in the third position (not the dead point). When the circuit breaker module is tripped, the movement of the operating handle can actuate the roller (because the roller is not in the dead point), so that the tripping action is associated with the movement of the roller, thereby facilitating the user to determine whether the circuit breaker is in the tripped state.

[0009] In some embodiments, when the roller is at a dead point, the direction of the force applied by the groove to the roller is perpendicular to the rotational movement direction of the roller; when the roller is at a position other than the dead point, the direction of the force applied by the groove to the roller is not perpendicular to the rotational movement direction of the roller.

[0010] In some embodiments, the roller may have a disc-shaped main body and an extension portion extending radially from the main body, and the protrusion extends from the extension portion toward the groove; the groove has a first wall and a second wall opposite to each other along a first direction, and the protrusion is clamped between the first wall and the second wall to be actuated by the first wall or the second wall to actuate the roller to rotate and move, and the first direction is the linear movement direction of the slider; wherein when the roller is at a dead point, the extension direction of the extension portion is parallel to the first direction, and when the roller is at a position outside the dead point, the extension direction of the extension portion is at an angle to the first direction.

[0011] In some solutions, the transmission assembly may further include a spring, one end of the spring is fixed, and the other end of the spring is connected to the roller, and the spring is configured to bias the roller toward the third position when the roller is in the fourth position.

[0012] In some embodiments, the circuit breaker may further include a trip transmission assembly, one end of which is connected to the trip unit, and the other end is arranged near the roller. When the circuit breaker module is triggered to trip by the trip unit, the trip unit actuates the trip transmission assembly, so that the trip transmission assembly actuates the roller to first leave the dead point, and then rotate to the second position under the action of the operating handle.

[0013] According to this solution, the tripping action is associated with the position of the roller through the tripping transmission assembly, thereby facilitating the user to determine whether the circuit breaker is in a tripping state.

[0014] In some solutions, the circuit breaker may further include a motor, and the roller is connected to an output shaft of the motor via a gear assembly.

[0015] According to this solution, the circuit breaker can be electrically operated via an electric motor.

[0016] In some embodiments, the gear assembly may include an input gear and an output gear, wherein the input gear is connected to the output shaft of the motor, the output gear is connected to the roller, and a manipulation hole is provided on the output gear, wherein the manipulation hole is configured to enable the output gear to be manually actuated.

[0017] According to this solution, the circuit breaker can be operated electrically or manually via the operating hole.

[0018] In some aspects, the input gear and / or the output gear may be a partial gear.

[0019] According to this solution, after a tripping action occurs, when the user manually operates the circuit breaker to open, the output gear can be disengaged from the input gear through the incomplete gear, thereby preventing the manual operation from being affected by the torque transmitted from the output shaft of the motor to the input gear.

[0020] In some solutions, the circuit breaker may further include a housing and an indicator, the housing is provided with a window, the indicator moves synchronously with the roller, and the indicator can be observed through the window. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a transmission assembly of a circuit breaker according to a first embodiment of the utility model is shown, wherein the circuit breaker is in an open state;

[0022] Figure 2 A schematic diagram of a transmission assembly of a circuit breaker according to a first embodiment of the utility model is shown, wherein the circuit breaker is in a tripped state;

[0023] Figure 3 A schematic diagram of a transmission assembly of a circuit breaker according to a first embodiment of the utility model is shown, wherein the circuit breaker is in a closed state;

[0024] Figure 4 A schematic diagram of a transmission assembly of a circuit breaker according to a first embodiment of the utility model is shown, wherein the circuit breaker is in a pre-closing state;

[0025] Figure 5 A schematic diagram of a transmission assembly of a circuit breaker according to a second embodiment of the utility model is shown, wherein the circuit breaker is in a closed state;

[0026] Figure 6 A schematic diagram of a transmission assembly of a circuit breaker according to a second embodiment of the utility model is shown, wherein the circuit breaker is in a tripped state;

[0027] Figure 7 A schematic diagram of a roller according to an embodiment of the utility model is shown;

[0028] Figure 8A schematic diagram of a slider according to an embodiment of the utility model is shown;

[0029] Fig. 9 A partial schematic diagram of a circuit breaker according to an embodiment of the utility model is shown.

[0030] Reference numerals:

[0031] 10 Circuit breaker module

[0032] 12 Operating handle

[0033] 20 Pre-charge switch module

[0034] 100 Transmission components

[0035] 110 Roller

[0036] 112 Main Body

[0037] 114 Extension

[0038] 116 Protrusion

[0039] 118 Actuator

[0040] 120 Sliders

[0041] 122 groove

[0042] 124 First Wall

[0043] 126 Second Wall

[0044] 130 Spring

[0045] 140 Gear assembly

[0046] 142 Input gear

[0047] 144 Output gear

[0048] 146 Control hole

[0049] 150 Guide Rail

[0050] 160 Indicator

[0051] 270 Trip drive assembly

[0052] 272 Actuator Arm DETAILED DESCRIPTION

[0053] In order to make the purpose, scheme and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the specific embodiments of the utility model. Unless otherwise specified, the terms used in this article have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0054] Figures 1 to 4 Schematic diagrams of a transmission assembly 100 of a circuit breaker according to a first embodiment of the present utility model are shown, wherein the circuit breaker is in an open state, a tripped state, a closed state, and a pre-closed state. The transmission assembly 100 may include a roller 110 and a slider 120. The slider 120 is connected to an operating handle 12 (such as Fig. 9 As shown in the figure, the slider 120 is provided with a groove 122 to actuate the operating handle 12 to move or be actuated by the operating handle 12 to move linearly along the guide rail 150. The roller 110 is provided with a protrusion 116, and the protrusion 116 extends into the groove 122 to actuate the slider 120 or be actuated by the slider 120 to rotate and move.

[0055] like Fig. 9 As shown, the circuit breaker also includes a circuit breaker module 10, and the circuit breaker module 10 has an operating handle 12, a breaking unit and a tripping unit. The slider 120 of the transmission assembly 100 is connected to the operating handle 12 to actuate the operating handle 12 or be actuated by the operating handle 12. The breaking unit includes a moving contact and a stationary contact, and the moving contact is configured to move between a closed position and an open position under the action of the operating handle 12. In the closed position, the moving contact contacts the stationary contact, and in the open position, the moving contact is separated from the stationary contact. And the circuit breaker module 10 can be switched to a tripping state under the action of the tripping unit, and during the tripping action, the moving contact is separated from the stationary contact under the action of the operating handle 12.

[0056] In the case of a fused switch, the circuit breaker may further include a pre-charge switch module 20, wherein the pre-charge switch module 20 is installed to the circuit breaker module 10, and the pre-charge switch module 20 has a pre-charge moving contact and a pre-charge static contact, and the pre-charge moving contact is configured to move between a pre-charge closed position and a pre-charge open position, in which the pre-charge moving contact is in contact with the pre-charge static contact, and in which the pre-charge open position, the pre-charge moving contact is separated from the pre-charge static contact.

[0057] When the circuit is in normal operation, the circuit breaker is generally in a closed state (i.e., the moving contact is in contact with the stationary contact). Once an unexpected condition occurs in the circuit (e.g., a short circuit or overload), the circuit breaker module 10 trips in response to the occurrence of the unexpected condition, causing the moving contact to be separated from the stationary contact, causing the operating handle 12 to rotate (e.g., Fig. 9However, in the prior art, the rotation of the handle 12 may not cause the rotation of the roller 110 because the roller 110 is in a dead point position and is difficult to actuate, making it difficult for the user to determine whether the circuit breaker module 10 is triggered to trip.

[0058] To this end, the present invention proposes a solution to improve the defect that the roller 110 is in a dead point position and is difficult to be actuated, so that the tripping action of the trip unit is associated with the rotation of the roller 110, so that the user can determine whether the circuit breaker module 10 is triggered to trip by observing the position of the roller 110. One solution is to set the position of the roller 110 at a position other than the dead point when the circuit breaker is in a closed state, and another solution is to first actuate the roller 110 to leave the dead point position through the tripping transmission assembly 270 during the tripping action. The specific solution is described in detail below.

[0059] In the first embodiment of the utility model, when the circuit breaker is in the closed state, the position of the roller 110 can be set to a position other than the dead point, so that when the circuit breaker module 10 is triggered to trip, the roller 110 can be actuated to rotate to provide the user with a reliable mechanical indication of the tripping action. The specific scheme of whether the roller 110 is at the dead point is as follows: When the roller 110 is at the dead point, the direction of the force applied to the roller 110 by the groove 122 is perpendicular to the rotational movement direction of the roller 110 (for example, as shown in FIG. Figure 4 As shown, the groove 122 applies a leftward force to the roller 110, and the roller 110 has an upward rotational movement tendency); when the roller 110 is at a position other than the dead point, the direction of the force applied by the groove 122 to the roller 110 is not perpendicular to the rotational movement direction of the roller 110 (for example, as Figure 3 As shown, the groove 122 applies a leftward force to the roller 110, and the roller 110 has a tendency to rotate and move upward to the left).

[0060] Specifically, Figure 7 As shown, the roller 110 may have a disc-shaped body 112 and an extension 114 extending radially from the body 112, and a protrusion 116 extending from the extension 114 toward the groove 122. Figure 8 As shown, the groove 122 has a first direction (the first direction is the linear movement direction of the slider 120, that is, Figures 1 to 4 The protrusion 116 is sandwiched between the first wall 124 and the second wall 126 so as to be actuated by the first wall 124 or the second wall 126 to actuate the roller 110 to rotate and move. Figure 4 As shown, at this time, the circuit breaker is in a pre-closing state, that is, the pre-charged moving contact is in contact with the pre-charged static contact), and the extension direction of the extension portion 114 is parallel to the first direction. Figure 3 As shown, the circuit breaker is in a closed state at this time), and the extending direction of the extending portion 114 forms an angle (for example, 30°) with the first direction.

[0061] Preferably, the transmission assembly 100 may further include a spring 130, one end of the spring 130 is fixed, and the other end is connected to the roller 110, and the spring 130 is configured to Figure 4 In the pre-closing state shown in FIG. 1 , the roller 110 is moved toward the third position (as shown in FIG. Figure 3 (closed state shown) bias.

[0062] In the first embodiment of the present invention, the operation of the circuit breaker can be divided into the following stages:

[0063] (1) From the closed state (such as Figure 3 to the tripped state (as shown) Figure 2 As shown in the figure, the trip unit triggers the tripping action in response to the abnormal condition in the circuit, and the operating handle 12 is actuated by the trip unit to separate the moving contact from the stationary contact. Because in the closed state, the third position of the roller 110 is a non-dead point position, the roller 110 can be actuated by the operating handle 12 via the slider 120 and rotated to the second position (for example, 60° counterclockwise).

[0064] (2) From the tripped state (such as Figure 2 to the open state (as shown) Figure 1 As shown in FIG. 1 , the roller 110 can be electrically or manually operated to rotate from the second position to the first position (eg, 90° counterclockwise) to actuate the operating handle 12, thereby driving the moving contact and the stationary contact to further separate.

[0065] (3) From the open state (such as Figure 1 as shown) to the pre-closing state (as shown Figure 4 As shown in the figure), when the unexpected condition in the circuit is eliminated, the roller can be electrically or manually operated to rotate from the first position to the fourth position (for example, rotate 180° clockwise) to make the pre-charged moving contact contact the pre-charged static contact. It should be understood that although the roller 110 passes through the third position during the period from the opening state to the pre-closing state, it does not cause the circuit breaker module 10 to be in the closed state because the pre-closing process has not been completed. In other words, when the roller 110 is in the third position, the circuit breaker module 10 is not necessarily in the closed state; but when the circuit breaker module 10 is in the closed state, the roller 110 must be in the third position.

[0066] (4) From the pre-closing state (such as Figure 4 to the closed state (as shown) Figure 3As shown in FIG. 1 , the roller 110 can be rotated from the fourth position at the dead point to the third position at the non-dead point (eg, rotated 30° counterclockwise) by the biasing force of the spring 130 .

[0067] The above realizes an operation cycle of the circuit breaker (closing→tripping→opening→pre-closing→closing). Because the third position of the roller 110 in the closed state is not a dead point position, during the tripping action, the roller 110 can be actuated by the operating handle 12 via the slider 120 to rotate, so as to provide the user with reliable mechanical indication of the tripping action.

[0068] In addition, the circuit breaker may further include a motor, and the roller 110 is connected to an output shaft of the motor via a gear assembly 140, so that the circuit breaker can be electrically operated via the motor.

[0069] Preferably, the gear assembly 140 may include an input gear 142 and an output gear 144, wherein the input gear 142 is connected to the output shaft of the motor, the output gear 144 is connected to the roller 110, and a manipulation hole 146 is provided on the output gear 144, wherein the manipulation hole 146 is configured such that the output gear 144 can be manually actuated. In this way, the circuit breaker can be electrically manipulated or manually manipulated via the manipulation hole 146.

[0070] Preferably, the input gear 142 and / or the output gear 144 may be an incomplete gear. When the tripping action occurs and the user manually operates the circuit breaker to open, the incomplete gear may disengage the output gear 144 from the input gear 142, thereby preventing the manual operation from being affected by the torque transmitted from the output shaft of the motor to the input gear 142.

[0071] Preferably, the circuit breaker may further include a housing and an indicator, wherein a window is provided on the housing, the indicator moves synchronously with the roller 110, and the indicator can be observed through the window. Thus, the user can determine the state of the circuit breaker by observing the indicator through the window.

[0072] Alternatively, in the second embodiment of the present invention, the tripping action of the tripping unit can also be associated with the rotation of the roller 110 by providing a tripping transmission assembly 270. For the sake of brevity, only the technical features of the second embodiment that are different from those of the first embodiment are described below, and the technical features that are the same as those of the first embodiment will not be described repeatedly.

[0073] One end of the trip transmission assembly 270 is connected to the trip unit, and the other end is arranged near the roller 110. When the circuit breaker module 10 is triggered to trip by the trip unit, the trip rod actuates the trip transmission assembly 270, so that the trip transmission assembly 270 actuates the roller 110 to first leave the dead point, and then rotate to the second position (for example, as shown in FIG. 1 ) under the action of the operating handle 12. Figure 5 and Figure 6 As shown in FIG. 2 , the roller 110 is rotated counterclockwise by 90°). Specifically, the trip transmission assembly 270 may have an actuating arm 272, and the roller 110 may be provided with an actuating portion 118 accordingly. The actuating arm 272 contacts and pushes the actuating portion 118 so that the trip transmission assembly 270 rotates the roller 110 to the second position. The tripping action is associated with the position of the roller 110 through the trip transmission assembly 270, so that it is convenient for the user to determine whether the circuit breaker is in a tripped state.

[0074] This document describes in detail several exemplary embodiments of the present invention with reference to preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations may be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention may be combined without exceeding the protection scope of the present invention, which is determined by the appended claims.

Claims

1. A circuit breaker, characterized in that: include: A circuit breaker module, comprising an operating handle, a breaking unit and a tripping unit, wherein the breaking unit comprises a moving contact and a stationary contact, wherein the moving contact is configured to move between a closed position and an open position under the action of the operating handle, wherein the moving contact contacts the stationary contact in the closed position, and wherein the moving contact is separated from the stationary contact in the open position, and wherein the circuit breaker module can be switched to a tripping state under the action of the tripping unit; Transmission components, including: A slider connected to the operating handle to actuate the operating handle to move or to be actuated by the operating handle to move linearly, the slider having a groove; A roller having a protrusion, wherein the protrusion extends into the groove to actuate the slider or be actuated by the slider to rotate and move between a first position, a second position and a third position; When the moving contact is in the disconnected position, the roller is in the first position, and when the moving contact is in the closed position, the roller is in the third position; Wherein, when the circuit breaker module is triggered to trip, the roller rotates and moves from the third position to the second position.

2. The circuit breaker according to claim 1, characterized in that: Also includes a pre-charge switch module, the pre-charge switch module is mounted to the circuit breaker module, the pre-charge switch module has a pre-charge moving contact and a pre-charge static contact, the pre-charge moving contact is configured to move between a pre-charge closed position and a pre-charge disconnected position, in which the pre-charge moving contact contacts the pre-charge static contact, and in which the pre-charge disconnected position the pre-charge moving contact is separated from the pre-charge static contact; The roller can also rotate to a fourth position, and when the pre-filled moving contact contacts the pre-filled static contact, the roller is in the fourth position.

3. The circuit breaker according to claim 2, characterized in that: When the roller is in the fourth position, the roller is at a dead point and cannot be actuated by the slider; When the roller is in the third position, the roller is not in a dead point, and the roller can be actuated by the slider.

4. The circuit breaker according to claim 3, characterized in that: When the roller is at the dead point, the direction of the force applied by the groove to the roller is perpendicular to the rotational movement direction of the roller; When the roller is at a position other than the dead point, the direction of the force applied to the roller by the groove is not perpendicular to the rotational movement direction of the roller.

5. The circuit breaker according to claim 4, characterized in that: The roller has a disc-shaped main body and an extension portion extending radially from the main body, and the protrusion extends from the extension portion toward the groove; The groove has a first wall and a second wall opposite to each other along a first direction, the protrusion is sandwiched between the first wall and the second wall, so as to be actuated by the first wall or the second wall to actuate the roller to rotate and move, and the first direction is the linear movement direction of the slider; When the roller is at the dead point, the extending direction of the extending portion is parallel to the first direction; when the roller is at a position other than the dead point, the extending direction of the extending portion forms an angle with the first direction.

6. The circuit breaker according to claim 3, characterized in that: The transmission assembly further includes a spring, one end of which is fixed and the other end of which is connected to the roller, and the spring is configured to bias the roller toward the third position when the roller is in the fourth position.

7. The circuit breaker according to claim 1, characterized in that: It also includes a trip transmission assembly, one end of which is connected to the trip unit, and the other end is arranged near the roller. When the circuit breaker module is triggered to trip by the trip unit, the trip unit actuates the trip transmission assembly, so that the trip transmission assembly actuates the roller to the second position.

8. The circuit breaker according to any one of claims 1 to 7, characterized in that: A motor is also included, and the roller is connected to an output shaft of the motor via a gear assembly.

9. The circuit breaker according to claim 8, characterized in that The gear assembly includes an input gear and an output gear, wherein the input gear is connected to the output shaft of the motor, the output gear is connected to the roller, and a manipulation hole is provided on the output gear, wherein the manipulation hole is configured to enable the output gear to be manually actuated.

10. The circuit breaker according to claim 9, characterized in that The input gear and / or the output gear are / is a partial gear.

11. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises a housing and an indicator. The housing is provided with a window. The indicator moves synchronously with the roller, and the indicator can be observed through the window.

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