Circuit breaker

Abstract

A circuit breaker belongs to the technical field of low-voltage apparatuses. Comprising a frame, an operating mechanism arranged in the frame and an opening locking device also arranged in the frame, the frame comprises a side plate, and the operating mechanism comprises an opening half shaft which is rotatably arranged on the side plate, drives a circuit breaker to open under the action of the opening locking device and is locked at an opening position. The opening locking device comprises a mounting plate, an opening signal collector, a mechanical program lock and a connecting rod mechanism, the mounting plate is fixed on the side plate, the opening signal collector and the mechanical program lock are fixed on the mounting plate, the connecting rod mechanism is connected between one end of a mechanical program lock core rod of the mechanical program lock and the opening half shaft, and the mechanical program lock core rod of the mechanical program lock is connected with the opening half shaft. The connecting rod mechanism acts to drive the circuit breaker to be opened and locked at the opening position, and the other end of the mechanical program lock cylinder rod of the mechanical program lock is matched with the opening signal collector. The circuit breaker has the advantage that interference factors are eliminated for miniaturized and compact design of the circuit breaker.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and particularly relates to a circuit breaker. Background Art

[0002] Circuit breakers are protective devices in low-voltage power distribution systems, crucial actuators for distributing electrical energy and interrupting fault currents. As is well known in the industry, interlocking mechanisms within circuit breaker control circuits play a crucial role in ensuring safe grid operation and preventing misoperation, which can lead to accidents and even serious personal injury. The logical control functions of power grid circuits require various interlocks. Specific implementations of these interlocks include preventing the accidental opening and closing of circuit breakers; preventing the opening and closing of disconnectors under load; and preventing the connection (closing) of grounding wires (grounding switches) under power. Authorized closing, as a mechanism to ensure the safety and compliance of closing operations, is a common and widely required feature in power systems. The reliability of this authorized closing function is often closely linked to the safety and economic efficiency of power operations. The trip lockout device is a key accessory inside the circuit breaker. During the locking process, it can stably ensure that the circuit breaker is always in the open state and prohibit closing, preventing various circuit faults caused by accidental closing of the circuit. It can also ensure that the circuit breaker can be stably opened in an emergency and lock the circuit breaker in the open state during maintenance to protect public property and personal safety.

[0003] While the program lock within the existing trip lockout device structure can directly drive the trip half-shaft to open the circuit breaker, as circuit breakers become increasingly compact, redundant space becomes increasingly scarce. Consequently, space limitations make it difficult or even impossible to directly install the program lock for driving the trip half-shaft at the location of the trip half-shaft. More specifically, if the components of the existing trip lockout device structure are not properly designed, the development of more compact circuit breaker structures will be constrained. Utility Model Content

[0004] The task of the utility model is to provide a circuit breaker which changes the prior art in which the opening half-shaft is directly driven by the program lock into an indirect way of driving the opening half-shaft through a connecting rod assembly, thereby eliminating the unfavorable factors affecting the development of miniaturization and compactness.

[0005] The task of the present utility model is accomplished in this way: a circuit breaker includes a frame, an operating mechanism arranged in the frame and an opening locking device also arranged in the frame, the frame includes a side plate, the operating mechanism includes an opening half-shaft rotatably arranged on the side plate, which is driven by the action of the opening locking device to open the circuit breaker and lock it in the opening position, the opening locking device includes a mounting plate, a closing signal collector, a mechanical program lock and a connecting rod mechanism, the mounting plate is fixed to the side plate, the opening signal collector and the mechanical program lock are fixed to the mounting plate, the connecting rod mechanism is connected between one end of the mechanical program lock core rod of the mechanical program lock and the opening half-shaft, and the connecting rod mechanism is actuated to drive the circuit breaker to open and lock it in the opening position, and the other end of the mechanical program lock core rod of the mechanical program lock cooperates with the opening signal collector.

[0006] In the present invention, the connecting rod mechanism includes a mechanical program lock connecting rod, a driving force output connecting rod, a transition connecting rod and a disconnect half-shaft connecting rod. One end of the mechanical program lock connecting rod is connected to one end of the mechanical program lock core rod of the mechanical program lock, and the other end is hinged to one end of the driving force output connecting rod. The other end of the driving force output connecting rod is hinged to one end of the transition connecting rod, and the other end of the transition connecting rod is hinged to one end of the disconnect half-shaft connecting rod, and the other end of the disconnect half-shaft connecting rod is fixedly connected to the disconnect half-shaft.

[0007] In the present invention, the connecting rod mechanism includes a mechanical program lock connecting rod, a transition connecting rod and a disconnect half-shaft connecting rod. One end of the mechanical program lock connecting rod is connected to one end of the mechanical program lock core rod of the mechanical program lock, and the other end is hinged to one end of the transition connecting rod. The other end of the transition connecting rod is hinged to one end of the disconnect half-shaft connecting rod, and the other end of the disconnect half-shaft connecting rod is fixedly connected to the disconnect half-shaft.

[0008] In the present invention, the shape of the mechanical process lock connecting rod is ┐-shaped, and the shape of the opening half-shaft connecting rod is L-shaped.

[0009] In the present invention, an adjustment hole is provided at one end of the transition connecting rod, and the other end of the driving force output connecting rod is hinged to one end of the transition connecting rod at a position corresponding to the adjustment hole.

[0010] In the present invention, an adjustment hole is provided at one end of the transition link, and the other end of the mechanical program lock connecting link is hinged to one end of the transition link at a position corresponding to the adjustment hole.

[0011] In the present invention, the adjustment hole is a waist-shaped hole.

[0012] In the present invention, the mechanical program lock has a key for controlling the movement of the mechanical program lock core rod.

[0013] In the present invention, the opening signal collector has an opening signal response head, and the other end of the mechanical program lock core rod cooperates with the opening signal response head.

[0014] In the present invention, the trip signal collector is a micro switch, a travel switch or a position proximity switch.

[0015] The technical solution provided by the utility model adopts a mounting plate, a trip signal collector, a mechanical program lock and a connecting rod mechanism as the structural system constituting the trip locking device, and the mounting plate is fixed to the side plate, the trip signal collector is fixed to the mounting plate at a position corresponding to the lower side of the mechanical program lock, and the connecting rod mechanism is connected between one end of the mechanical program lock core rod of the mechanical program lock matched with the trip signal collector and the trip half-shaft, and the mechanical program lock drives the trip half-shaft through the connecting rod mechanism, thereby abandoning the design mode in the prior art where the program lock directly drives the trip half-shaft, and eliminating interference factors for the miniaturization and compact design of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 The three-dimensional structural diagram of the opening lock device shown;

[0018] Figure 3 for Figure 2 Schematic diagram of the right side observation;

[0019] Figure 4 for Figures 1 to 3 Detailed structural diagram of the mechanical program lock connecting rod of the linkage mechanism shown;

[0020] Figure 5 for Figures 1 to 3 The detailed structural diagram of the connecting rod of the opening half-shaft of the connecting rod mechanism is shown. DETAILED DESCRIPTION

[0021] In order to more clearly understand the technical essence and beneficial effects of the present invention, a detailed description will be given below in the form of embodiments. However, the description of the embodiments does not limit the scheme of the present invention. Any equivalent transformation that is merely formal and not substantial based on the concept of the present invention should be regarded as within the scope of the technical solution of the present invention.

[0022] In the following description, all concepts related to directionality or orientation, such as up, down, left, right, front and back, are based on Figure 1 The position state is taken as an example, and therefore it cannot be understood as a special limitation of the technical solution provided by the present utility model.

[0023] See Figures 1 to 5 Since the frame of the circuit breaker and the operating mechanism arranged in the frame are well known, although they are not shown in the figure, it will not cause confusion to the understanding of those skilled in the art. The opening locking device 1 arranged in the frame is shown, and the side plate 2 in the structural system of the aforementioned frame is shown. The aforementioned operating mechanism includes an opening half-shaft 3 rotatably arranged on the side plate 2, which is driven to open the circuit breaker and locked in the open position by the action of the aforementioned opening locking device 1.

[0024] The technical points of the technical solution provided by the present invention are as follows: the aforementioned opening lock device 1 includes a mounting plate 11, an opening signal collector 12, a mechanical program lock 13 and a connecting rod mechanism 14, and the mounting plate 11 is connected to the opening lock device 11 by a fastener such as Figure 2 The mounting plate screws 111 shown are fixed to the aforementioned side plate 2, and the trip signal collector 12 and the mechanical program lock 13 are fixed to the mounting plate 11 by a fixing method that does not require special limitation as long as the fixing purpose can be achieved. The connecting rod mechanism 14 is connected between one end (i.e., the upper end) of the mechanical program lock core rod 131 of the mechanical program lock 13 and the aforementioned trip half-shaft 3, and the connecting rod mechanism 14 is actuated to drive the circuit breaker to trip and lock it in the trip position. The other end (i.e., the "lower end") of the mechanical program lock core rod 131 of the aforementioned mechanical program lock 13 cooperates with the aforementioned trip signal collector 12.

[0025] In the present invention, the aforementioned connecting rod mechanism 14 includes a mechanical program lock connecting rod 141, a driving force output connecting rod 142, a transition connecting rod 143 and a brake half-shaft connecting rod 144. One end, i.e., the upper end, of the mechanical program lock connecting rod 141 is connected to one end of the mechanical program lock core rod 131 of the aforementioned mechanical program lock 13 through a mechanical program lock connecting rod fixing screw 1411 (also called a "hinge pin"), and the other end is hinged to one end of the driving force output connecting rod 142 at a position corresponding to the driving force output shaft hinge screw hole 1413 through a driving force output shaft hinge screw 1412. The other end of the driving force output link 142 is hinged to one end of the transition link 143 through the transition link hinge screw 1421 (also called "hinge pin"), and the other end of the transition link 143 is hinged to one end of the disconnect half-shaft connecting link 144 through the disconnect half-shaft connecting link hinge screw 1432 at a position corresponding to the hinge hole 1443 (also called "hinge pin"), and the other end of the disconnect half-shaft connecting link 144 is fixedly connected to the aforementioned disconnect half-shaft 3 at a position corresponding to the disconnect half-shaft fixing screw hole 1442 through a pair of disconnect half-shaft fixing screws 1441.

[0026] As another embodiment, the aforementioned connecting rod mechanism 14 includes a mechanical program lock connecting rod 141, a transition connecting rod 143, and a trip half-shaft connecting rod 144. One end of the mechanical program lock connecting rod 141 is connected to one end of the mechanical program lock core rod 131 of the aforementioned mechanical program lock 13, and the other end is hinged to one end of the transition connecting rod 143. The other end of the transition connecting rod 143 is hinged to one end of the trip half-shaft connecting rod 144, and the other end of the trip half-shaft connecting rod 144 is fixedly connected to the aforementioned trip half-shaft 3. Since the specific articulation method is the same as the aforementioned, the applicant will not elaborate on it. With regard to this other, i.e., second, embodiment, the driving force output connecting rod 142 is omitted compared to the previous embodiment.

[0027] Of course, the structural forms and connection methods of the mechanical program lock connecting rod 141, the driving force output connecting rod 142, the transition connecting rod 143, and the opening half-shaft connecting rod 144 are not limited to the two aforementioned situations. Any changes in form but not substance should be considered within the technical connotation of the present invention. Specifically, as long as the driving force of the mechanical program lock core rod 131 of the mechanical program lock 13 is transmitted to the opening half-shaft 3 in the form of a connecting rod, thereby causing the opening half-shaft 3 to operate, it should be considered within the technical essence of the present invention.

[0028] In this utility model, Figure 4 and Figure 5 As shown, the shape of the mechanical program lock connecting rod 141 is ┐ shape ( Figure 4 ), and the aforementioned opening half-shaft connecting rod 144 is in an L-shape ( Figure 5 Show).

[0029] In the present invention, an adjustment hole 1431 is opened at one end of the aforementioned transition link 143, and the other end of the aforementioned driving force output link 142 is hinged to one end of the transition link 143 at a position corresponding to the adjustment hole 1431 through the aforementioned transition link hinge screw 1421.

[0030] Compared with the other embodiment mentioned above, when the driving force output connecting rod 142 is omitted, in the present invention, an adjustment hole 1431 is opened at one end of the aforementioned transition connecting rod 143, and the other end of the aforementioned mechanical program lock connecting rod 141 is hinged to one end of the transition connecting rod 143 at a position corresponding to the adjustment hole 1431.

[0031] In the present invention, the aforementioned adjustment hole 1431 is a waist-shaped hole.

[0032] In this utility model, Figures 1 to 3 As shown, the aforementioned mechanical program lock 13 has a key 4 for controlling the movement of the aforementioned mechanical program lock core rod 131.

[0033] In the present invention, the aforementioned trip signal collector 12 has a trip signal response head 121, and the other end of the aforementioned mechanical program lock core rod 131 cooperates with the trip signal response head 121. In the present invention, the aforementioned trip signal collector 12 is a micro switch, but it can also be a travel switch or a position proximity switch.

[0034] Based on the above description and combined Figures 1 to 3 It can be seen that the mechanical program lock 13 has a mechanical program lock core rod 131 (also called "lock rod") that can move up and down. The upper end of the mechanical program lock core rod 131 extends upward from the above-mentioned external threaded tubular structure, and the lower end extends downward from the lower end of the mechanical program lock 13. The stroke is preferably 10-20mm (the stroke that can be moved back and forth up and down). When the key 4 is turned, the mechanical program lock core rod 131 moves upward, pushing the mechanical program lock connecting rod 141, and then driving the driving force output connecting rod 142 to rotate, thereby driving the mechanical program lock 131 to move upward. The dynamic transition link 143 rotates, ultimately driving the opening half-shaft connecting link 144 to rotate the opening half-shaft 3, achieving mechanical opening lock of the circuit breaker. Simultaneously with the upward movement of the aforementioned mechanical program lock core rod 131, its lower end simultaneously leaves the opening signal collector 12, which is fully activated by the microswitch, and returns to the interior of the mechanical program lock 13. Because the normally open contacts of the opening signal collector 12 are connected to the circuit breaker closing lock electrical signal circuit, the closing lock electromagnet loses power, achieving electrical opening lock of the circuit breaker. In the circuit breaker's open locked state, the key 4 can be removed.

[0035] In summary, the technical solution provided by the present utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A circuit breaker comprising a frame, an operating mechanism disposed within the frame, and an opening locking device (1) also disposed within the frame, wherein the frame comprises a side plate (2), the operating mechanism comprising an opening half-shaft (3) rotatably disposed on the side plate (2) and driven to open the circuit breaker and locked in an open position by the action of the opening locking device (1), characterized in that: The opening lock device (1) comprises a mounting plate (11), an opening signal collector (12), a mechanical program lock (13) and a connecting rod mechanism (14); the mounting plate (11) is fixed on the side plate (2); the opening signal collector (12) and the mechanical program lock (13) are fixed on the mounting plate (11); the connecting rod mechanism (14) is connected between one end of a mechanical program lock core rod (131) of the mechanical program lock (13) and the opening half shaft (3); and the connecting rod mechanism (14) is actuated to drive the circuit breaker to open and lock it in the opening position; the other end of the mechanical program lock core rod (131) of the mechanical program lock (13) cooperates with the opening signal collector (12).

2. A circuit breaker according to claim 1, characterized in that: The connecting rod mechanism (14) includes a mechanical program lock connecting rod (141), a driving force output connecting rod (142), a transition connecting rod (143) and a switch-off half-shaft connecting rod (144). One end of the mechanical program lock connecting rod (141) is connected to one end of the mechanical program lock core rod (131) of the mechanical program lock (13), and the other end is hinged to one end of the driving force output connecting rod (142). The other end of the driving force output connecting rod (142) is hinged to one end of the transition connecting rod (143), and the other end of the transition connecting rod (143) is hinged to one end of the switch-off half-shaft connecting rod (144), and the other end of the switch-off half-shaft connecting rod (144) is fixedly connected to the switch-off half-shaft (3).

3. The circuit breaker according to claim 1, wherein: The connecting rod mechanism (14) includes a mechanical program lock connecting rod (141), a transition connecting rod (143) and a tripping half-shaft connecting rod (144), one end of the mechanical program lock connecting rod (141) is connected to one end of the mechanical program lock core rod (131) of the mechanical program lock (13), and the other end is hinged to one end of the transition connecting rod (143), the other end of the transition connecting rod (143) is hinged to one end of the tripping half-shaft connecting rod (144), and the other end of the tripping half-shaft connecting rod (144) is fixedly connected to the tripping half-shaft (3).

4. A circuit breaker according to claim 2 or 3, characterized in that: The mechanical process lock connecting rod (141) is in the shape of a letter V, and the opening half-shaft connecting rod (144) is in the shape of a letter L.

5. A circuit breaker according to claim 2, characterized in that: An adjustment hole (1431) is provided at one end of the transition connecting rod (143), and the other end of the driving force output connecting rod (142) is hinged to one end of the transition connecting rod (143) at a position corresponding to the adjustment hole (1431).

6. A circuit breaker according to claim 3, characterized in that: An adjustment hole (1431) is provided at one end of the transition link (143), and the other end of the mechanical program lock connecting link (141) is hinged to one end of the transition link (143) at a position corresponding to the adjustment hole (1431).

7. A circuit breaker according to claim 5 or 6, characterized in that: The adjustment hole (1431) is a waist-shaped hole.

8. A circuit breaker according to claim 1 or 2, characterized in that: The mechanical program lock (13) has a key (4) for controlling the movement of the mechanical program lock core rod (131).

9. The circuit breaker according to claim 1, characterized in that: The opening signal collector (12) has an opening signal response head (121), and the other end of the mechanical program lock core rod (131) cooperates with the opening signal response head (121).

10. A circuit breaker according to claim 1 or 9, characterized in that: The opening signal collector (12) is a micro switch, a travel switch or a position proximity switch.

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