Double-contact circuit breaker

Abstract

A double-contact circuit breaker is characterized in that the double-contact circuit breaker comprises a first moving contact assembly and a second moving contact assembly, the first moving contact assembly and the second moving contact assembly can rotate around a rotating center under the driving of an operating mechanism, and the rotating directions of the first moving contact assembly and the second moving contact assembly are opposite in the process of rotating around the rotating center. According to the double-contact circuit breaker, the transmission mechanism is additionally arranged between the two groups of moving contacts, so that the two groups of moving contacts are separated while the synchronous movement of the two groups of moving contacts is ensured, the maintenance and replacement cost is reduced, and the installation difficulty is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers, and specifically relates to a double-contact circuit breaker. Background Art

[0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their application scope. Low-voltage circuit breakers, also known as automatic switches, commonly known as "air switches", are electrical appliances that have both the functions of manual switches and can automatically perform undervoltage, overvoltage, overload, and short-circuit protection. It can be used to distribute electric energy, start asynchronous motors infrequently, and protect power supply lines and motors. When they have serious overload, short-circuit, or undervoltage faults, it can automatically cut off the circuit. Its function is equivalent to the combination of a fuse switch and an over- and under-thermal relay, etc. Moreover, generally no parts need to be changed after breaking the fault current, and it has been widely used.

[0003] With the continuous increase of the power grid capacity and the need for centralized power distribution, the electrical appliances are required to have higher and higher breaking capacity. Therefore, current-limiting contact structures have been widely used in molded case circuit breakers. Especially for circuit breakers with double-breakpoint structures, since the arc energy is borne by two contacts, the breaking capacity is further improved, and it has developed more widely in recent years; however, in existing double-contact circuit breakers, the contacts are generally of an integral structure. The requirement for the traditional integral double-contact structure is that the contacts can deflect at a small angle around a point, and the adaptability requirement for the contacts is very high. Once the rotation angle of one of the contacts is too large or too small, the contact ability of the other contact will decrease, resulting in the circuit breaker being unable to be switched on. Moreover, the existing integral double-contact structure on the market uses riveting technology, which requires high processing ability and is difficult to install. Summary of the Utility Model

[0004] The purpose of the utility model is to address the defects of the complex process and difficult installation of the integral double-contact structure in the existing circuit breakers, and provide a double-contact circuit breaker. A transmission mechanism is added between two sets of moving contacts. While ensuring the synchronous movement of the two sets of moving contacts, the two sets of moving contacts are separately arranged, with a simple process and reduced installation difficulty.

[0005] Technical Solution

[0006] To achieve the above technical purpose, a double-contact circuit breaker provided by the utility model is characterized in that: it includes a first moving contact assembly and a second moving contact assembly. The first moving contact assembly and the second moving contact assembly can rotate around the same rotation center under the drive of an operating mechanism, and the rotation directions of the first moving contact assembly and the second moving contact assembly are opposite during the process of rotating around the same rotation center.

[0007] In one embodiment, the operating mechanism includes a handle which is connected to the mechanism assembly through a connecting rod. The handle can drive the mechanism assembly to rotate through the connecting rod. During the rotation of the mechanism assembly, the moving contact assembly one installed together with it can be driven to rotate. The moving contact assembly one is linked with the moving contact assembly two through a transmission mechanism. During the rotation of the moving contact assembly one, it can drive the moving contact assembly two to rotate synchronously through the transmission mechanism. The moving contact assembly one and the moving contact assembly two rotate in opposite directions.

[0008] In one embodiment, the moving contact assembly one and the moving contact assembly two rotate at the same angular velocity.

[0009] In one embodiment, the moving contact assembly one and the moving contact assembly two are arranged along the width direction with the rotation center, and the handle, the mechanism assembly, and the arc extinguishing chamber are arranged along the height direction.

[0010] In one embodiment, the moving contact assembly one includes a contact seat one which is rotatably installed on the inner surface of the shell cavity. The contact seat one is pivotally installed on the mechanism seat. A reset torsion spring one is arranged between the contact seat and the shell to reset the contact seat one. A linkage reset torsion spring one is arranged between the contact seat one and the mechanism seat to drive the rotation of the contact seat one and the reset of the mechanism seat. The moving contact one is fixedly installed on the contact seat one and can move synchronously with the contact seat one. A gear linkage part one is arranged at the corresponding position of the contact seat one to be linked with the transmission mechanism.

[0011] In one embodiment, a cylinder protrudes from the contact seat one. A circular hole is arranged at the corresponding position on the inner surface of the shell cavity with respect to the cylinder. The cylinder is installed in the circular hole so that the contact seat one is rotatably installed in the shell cavity. The reset torsion spring one is installed in the torsion spring groove on the inner surface of the shell cavity, with one end abutting against the limiting wall on the contact seat one and the other end placed in the limiting card slot on the inner surface of the shell cavity.

[0012] In one embodiment, the mechanism seat is pivotally installed on the cylindrical protrusion on the side surface of the contact seat one opposite to the cylinder. The linkage reset torsion spring one is installed on the cylindrical protrusion, with one end clamped in the card slot one on the mechanism seat and the other end clamped in the corresponding card slot two and card slot three on the mechanism seat and the contact seat one.

[0013] In one embodiment, the inner cavity of the shell is divided into a front chamber and a rear chamber by a partition. A circular hole is arranged at the corresponding position on the front surface of the partition with respect to the cylinder. The cylinder is installed in the circular hole so that the contact seat one is rotatably installed in the front chamber. The reset torsion spring one is installed in the torsion spring groove on the front surface of the partition, with one end abutting against the limiting wall on the contact seat one and the other end placed in the limiting card slot on the front surface of the partition.

[0014] In one embodiment, the transmission mechanism includes a first transmission gear, which is linked with a first gear linkage part and can rotate under the drive of the first contact seat. The first transmission gear rotates in the opposite direction to the first contact seat. The first transmission gear is rotatably installed in the inner cavity of the housing. A second transmission gear is rotatably installed in the inner cavity of the housing. The second transmission gear and the first transmission gear are connected by a transmission rod. The first transmission gear drives the second transmission gear to rotate in the same direction through the transmission rod. A third transmission gear is rotatably installed in the inner cavity of the housing. The third transmission gear is linked with the second transmission gear and can rotate in the opposite direction under the drive of the second transmission gear.

[0015] In one embodiment, the first transmission gear is rotatably installed on the front surface of a partition in the front chamber through a first positioning rod. The second transmission gear is rotatably installed on the back surface of the partition in the rear chamber through a second positioning rod. The transmission rod passes through an oblong hole in the partition and is connected to the first and second transmission gears. The movement stroke of the transmission rod is limited by the oblong hole. The third transmission gear is rotatably installed on the back surface of the partition in the rear chamber through a third positioning rod.

[0016] In one embodiment, the second moving contact assembly includes a second contact seat, which is rotatably installed in the inner cavity of the housing. The second contact seat is linked with the third transmission gear and can rotate in the opposite direction under the drive of the third transmission gear. A second moving contact is fixedly installed on the second contact seat and can rotate synchronously with the second contact seat.

[0017] In one embodiment, the second contact seat is rotatably installed on the back surface of the partition in the rear chamber through a fourth positioning rod. The second moving contact is fixedly installed on the second contact seat through a second fixing torsion spring and can rotate synchronously with the second contact seat.

[0018] Beneficial effects

[0019] The utility model provides a double-contact circuit breaker, which is characterized in that it includes a first moving contact assembly and a second moving contact assembly. The first moving contact assembly and the second moving contact assembly can rotate around the same rotation center under the drive of an operating mechanism. The first moving contact assembly and the second moving contact assembly rotate in opposite directions during the process of rotating around the same rotation center. While ensuring the synchronous movement of the two groups of moving contacts, the two groups of moving contacts of this double-contact circuit breaker are separately arranged, the production process is simple and reliable, the adaptability of the two groups of contacts can be adjusted separately, the power connection performance is reliable without interference, the maintenance and replacement cost is reduced, and the installation difficulty is lowered. Description of the drawings

[0020] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0021] Attached Figure 1 is a schematic diagram of the connection between the operating mechanism and the moving contact system in the embodiment of the present utility model; Figure 1 ;

[0022] Attached Figure 2 is a schematic diagram of the connection between the operating mechanism and the moving contact system in the embodiment of the present utility model; Figure 2 ;

[0023] Attached Figure 3 is a front schematic diagram of the connection between the operating mechanism and the moving contact system in the embodiment of the present utility model;

[0024] Attached Figure 4 is a reverse schematic diagram of the connection between the operating mechanism and the moving contact system in the embodiment of the present utility model;

[0025] Attached Figure 5 is a schematic diagram of the mechanism seat in the embodiment of the present utility model; Figure 1 ;

[0026] Attached Figure 6 is a schematic diagram of the mechanism seat in the embodiment of the present utility model; Figure 2 ;

[0027] Attached Figure 7a is a schematic diagram of the connection between the first contact seat and the first moving contact in the embodiment of the present utility model; Figure 1 ;

[0028] Attached Figure 7b is a schematic diagram of the connection between the first contact seat and the first moving contact in the embodiment of the present utility model; Figure 2 ;

[0029] Attached Figure 8a is a schematic diagram of the position of the round hole in the embodiment of the present utility model;

[0030] Attached Figure 8b is a schematic diagram of the installation of the first contact seat in the embodiment of the present utility model;

[0031] Attached Figure 9a is a schematic diagram of the first transmission gear in the embodiment of the present utility model; Figure 1 ;

[0032] Attached Figure 9b is a schematic diagram of the first transmission gear in the embodiment of the present utility model; Figure 2 ;

[0033] Appendix Figure 10a is a schematic diagram of the connection between the mechanism base and the contact base 1 in an embodiment of the present utility model Figure 1 ;

[0034] Appendix Figure 10b is a schematic diagram of the connection between the linkage reset torsion spring 1 and the contact base 1 in an embodiment of the present utility model Figure 2 ;

[0035] Appendix Figure 11 is a schematic diagram of the connection between the mechanism base, the contact base 1, and the transmission gear 1 in an embodiment of the present utility model Figure 1 ;

[0036] Appendix Figure 12 is a schematic diagram of the connection between the mechanism base, the contact base 1, and the transmission gear 1 in an embodiment of the present utility model Figure 2 ;

[0037] Appendix Figure 13 is a schematic diagram of the connection between the mechanism base, the contact base 1, and the transmission gear 1 in an embodiment of the present utility model Figure 3 ;

[0038] Appendix Figure 14a is a schematic diagram of the transmission gear 2 in an embodiment of the present utility model Figure 1 ;

[0039] Appendix Figure 14b is a schematic diagram of the transmission gear 2 in an embodiment of the present utility model Figure 2 ;

[0040] Appendix Figure 15a is a schematic diagram of the position of the positioning rod 2 in an embodiment of the present utility model;

[0041] Appendix Figure 15b is a schematic diagram of the installation of the transmission gear 2 in an embodiment of the present utility model;

[0042] Appendix Figure 16 is a schematic diagram of the connection between the transmission gear 1 and the transmission gear 2 in an embodiment of the present utility model Figure 1 ;

[0043] Appendix Figure 17 is a schematic diagram of the connection between the transmission gear 1 and the transmission gear 2 in an embodiment of the present utility model Figure 2 ;

[0044] Appendix Figure 18 is a schematic diagram of the transmission gear 3 in an embodiment of the present utility model Figure 1 ;

[0045] Appendix Figure 19 is a schematic diagram of the transmission gear 3 in an embodiment of the present utility model Figure 2 ;

[0046] Appendix Figure 20It is a schematic diagram showing the connection of the second driving gear and the third driving gear in the embodiment of the present utility model;

[0047] Appendix Figure 21 It is a schematic diagram showing the connection of the second contact seat and the second moving contact in the embodiment of the present utility model Figure 1 ;

[0048] Appendix Figure 22 It is a schematic diagram showing the connection of the second contact seat and the second moving contact in the embodiment of the present utility model Figure 2 ;

[0049] Appendix Figure 23 It is a schematic diagram showing the connection of the second driving gear, the third driving gear, and the second contact seat in the embodiment of the present utility model Figure 1 ;

[0050] Appendix Figure 24 It is a schematic diagram showing the connection of the second driving gear, the third driving gear, and the second contact seat in the embodiment of the present utility model Figure 2 ;

[0051] Appendix Figure 25 It is a front view schematic diagram of the circuit breaker in the open state in the embodiment of the present utility model Figure 1 ;

[0052] Appendix Figure 26 It is a front view schematic diagram of the circuit breaker in the open state in the embodiment of the present utility model Figure 2 ;

[0053] Appendix Figure 27 It is a rear view schematic diagram of the circuit breaker in the open state in the embodiment of the present utility model Figure 1 ;

[0054] Appendix Figure 28 It is a rear view schematic diagram of the circuit breaker in the open state in the embodiment of the present utility model Figure 2 ;

[0055] Appendix Figure 29 It is a front view schematic diagram of the circuit breaker in the closed state in the embodiment of the present utility model Figure 1 ;

[0056] Appendix Figure 30 It is a front view schematic diagram of the circuit breaker in the closed state in the embodiment of the present utility model Figure 2 ;

[0057] Appendix Figure 31 It is a rear view schematic diagram of the circuit breaker in the closed state in the embodiment of the present utility model Figure 1 ;

[0058] Appendix Figure 32 It is a rear view schematic diagram of the circuit breaker in the closed state in the embodiment of the present utility model Figure 2 ; Detailed implementation manners

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0060] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of this application are only for the purpose of illustration and do not represent the only implementation.

[0061] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0062] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below", and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0063] Unless otherwise defined, all the technical and scientific terms used in the description of this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the description of this application includes any and all combinations of one or more of the related listed items.

[0064] Embodiment

[0065] In the traditional integral double-contact structure, the two sets of moving contacts affect each other. Once a fault occurs in one set of moving contacts, the other set of moving contacts must be replaced simultaneously, resulting in a relatively high cost. Moreover, the integral double-contact structure needs to meet the requirement that both sets of moving contacts must be installed in place, which requires a high installation accuracy and is difficult to install. To solve this problem, this embodiment provides a double-contact circuit breaker, which includes a first moving contact assembly 4 and a second moving contact assembly 6. The first moving contact assembly 4 and the second moving contact assembly 6 can rotate around the rotation center under the drive of the operating mechanism, and the rotation directions of the first moving contact assembly 4 and the second moving contact assembly 6 are opposite during the rotation around the rotation center. The rotation of the first moving contact assembly 4 and the second moving contact assembly 6 around the rotation center reduces the occupied space. The double-contact structure is separately arranged, reducing the maintenance and replacement costs and lowering the installation difficulty.

[0066] To achieve the purpose that the rotation directions of the above double-contact structure are opposite during the rotation around the rotation center, in this embodiment, to better illustrate the positional relationship between the moving parts, as shown in the attached Figure 25 figures, the horizontal direction in the front view of the circuit breaker in the open state is defined as the length direction of the circuit breaker, the front-back direction in the front view of the circuit breaker in the open state is defined as the width direction of the circuit breaker, and the up-down direction in the front view of the circuit breaker in the open state is defined as the height direction of the circuit breaker. Specifically, as shown in the attached Figure 1 , 2, 3, 4, the operating mechanism includes a handle 1. The handle 1 is connected to the mechanism assembly 3 through a connecting rod 2. The handle 1 drives the mechanism assembly 3 to rotate through the connecting rod 2. During the rotation of the mechanism assembly 3, it can drive the first moving contact assembly 4 installed together with it to rotate. The first moving contact assembly 4 is linked with the second moving contact assembly 6 through a transmission mechanism 5. During the rotation of the first moving contact assembly 4, it can drive the second moving contact assembly 6 to rotate synchronously through the transmission mechanism 5. The rotation directions of the first moving contact assembly 4 and the second moving contact assembly 6 are opposite, forming a scissor shape. Among them, the mechanism assembly 3 includes a mechanism base 301. A tripping latch 302 and a locking latch 303 are rotatably installed on the mechanism base 301. One end of the connecting rod 2 is connected to the handle 1, and the other end is connected to the tripping latch. To ensure that the first moving contact assembly 4 and the second moving contact assembly 6 and the corresponding first static contact 8 and second static contact 9 can contact and separate simultaneously, the first moving contact assembly 4 and the second moving contact assembly 6 rotate at the same angular velocity, which improves and ensures the breaking performance of the circuit breaker. Further, the first moving contact assembly 4 and the second moving contact assembly 6 are arranged along the width direction around the rotation center, and the handle 1, the mechanism assembly 3, and the arc extinguishing chamber are arranged along the height direction.

[0067] To achieve the technical purpose of this embodiment, the detailed structures of the components will be described below. The first moving contact assembly 4 includes a first contact seat 401, as shown in the attached Figure 7a and 7bThe shown first contact base 401 is rotatably installed on the inner cavity surface of the housing 7, and the first contact base 401 is pivotally installed on the mechanism base 301 as shown in the appendix Figure 5 and 6 shown. A first reset torsion spring 402 is arranged between the first contact base 401 and the housing 7, which can reset the first contact base 401. As shown in the appendix Figure 10a and 10b shown. A linkage reset torsion spring 403 is arranged between the first contact base 401 and the mechanism base 301 to drive the rotation of the first contact base 401 and the reset of the mechanism base 301. The first moving contact 404 is fixedly installed on the first contact base 401 and can move synchronously with the first contact base 401. In this embodiment, the first moving contact 404 is fixedly installed on the first contact base 401 by hot riveting and can move synchronously with the first contact base 401. At the corresponding position of the first contact base 401, a first gear linkage part 401d is provided corresponding to the transmission mechanism 5. As shown in the appendix Figure 1 shown. At the corresponding position of the first contact base 401 and the first transmission gear 501, a first gear linkage part 401d is provided. Both the first contact base 401 and the mechanism base 301 are provided with teeth. The teeth of the first contact base 401 are meshed with the first transmission gear 501 to drive the first transmission gear 501 to move synchronously. And the teeth provided on the first contact base 401 are used for guiding when the first transmission gear 501 is installed from top to bottom.

[0068] Furthermore, the specific structure is as shown in the appendix Figure 7a and 7b shown. A cylinder 401a protrudes from the first contact base 401. As shown in the appendix Figure 8a and 8b shown. At the corresponding position on the inner cavity surface of the housing 7 and the cylinder 401a, a round hole 701 is provided. The cylinder 401a is installed in the round hole 701 so that the first contact base 401 is rotatably installed in the inner cavity of the housing 7. The first reset torsion spring 402 is installed in the torsion spring groove 702 on the inner cavity surface of the housing 7. One end abuts against the limit wall 401b on the first contact base 401, and the other end is placed in the limit card slot 703 on the inner cavity surface of the housing 7. The mechanism base 301 is pivotally installed on the cylindrical protrusion 401c on the side surface of the first contact base 401 opposite to the cylinder 401a. As shown in the appendix Figure 10a and 10b shown. The linkage reset torsion spring 403 is installed on the cylindrical protrusion 401c. One end is clamped in the first card slot 301a on the mechanism base 301, and the other end is clamped in the corresponding second card slot 301b and third card slot 401e on the mechanism base 301 and the first contact base 401, so as to ensure the synchronous movement of the mechanism base 301 and the first contact base 401.

[0069] In this embodiment, as shown in the appendix Figures 25 - 32As shown, the inner cavity of the housing 7 is divided into a front chamber 7a and a rear chamber 7b by a partition 7c. A circular hole 701 is provided at a position on the front surface of the partition 7c corresponding to the cylinder 401a. The cylinder 401a is installed in the circular hole 701 so that the first contact seat 401 can be rotatably installed in the front chamber 7a. A first return torsion spring 402 is installed in a torsion spring groove 702 on the front surface of the partition 7c. One end abuts against a limiting wall 401b on the first contact seat 401, and the other end is placed in a limiting card slot 703 on the front surface of the partition 7c.

[0070] The transmission mechanism 5 includes a first transmission gear 501 as shown in the appendix Figure 9a and 9b shown. As shown in the appendix Figure 11 , 12, 13, the first transmission gear 501 is linked with a first gear linkage part 401d and can rotate under the drive of the first contact seat 401. The rotation direction of the first transmission gear 501 is opposite to that of the first contact seat 401. The first transmission gear 501 is rotatably installed in the inner cavity of the housing 7. As shown in the appendix Figure 14a and 14b shown, a second transmission gear 502 is rotatably installed in the inner cavity of the housing 7. As shown in the appendix Figure 16 and 17 shown, the second transmission gear 502 and the first transmission gear 501 are connected by a transmission rod 503. The first transmission gear 501 drives the second transmission gear 502 to rotate in the same direction through the transmission rod 503. As shown in the appendix Figure 18 and 19 shown, a third transmission gear 504 is rotatably installed in the inner cavity of the housing 7. The third transmission gear 504 is linked with (specifically, meshes with) the second transmission gear 502 and can rotate in the opposite direction under the drive of the second transmission gear 502 as shown in the appendix Figure 20 shown. As shown in the appendix Figure 25 and 26 shown. Specifically, the first transmission gear 501 is rotatably installed on the front surface of the partition 7c in the front chamber 7a through a first positioning rod 505. As shown in the appendix Figure 15a and 15bAs shown, the second transmission gear 502 is rotatably mounted on the back of the partition plate 7c within the rear chamber 7b via the second positioning rod 506. The transmission rod 503 passes through an oblong hole (not shown in the drawing) on the partition plate 7c and is connected to the first transmission gear 501 and the second transmission gear 502. The movement stroke of the transmission rod 503 is restricted by the oblong hole. The third transmission gear 504 is rotatably mounted on the back of the partition plate 7c within the rear chamber 7b via the third positioning rod 507. Positioning marks one 301c and two 501a are respectively provided on the mechanism base 301 and the first transmission gear 501 for alignment during installation. Positioning marks three 502a and four 504a are respectively provided on the second transmission gear 502 and the third transmission gear 504 for alignment during installation. Thus, it is ensured that the number of meshing teeth is equal throughout the entire movement process.

[0071] The second moving contact assembly 6 includes a contact seat two 601. As shown in the attached Figure 21 and 22 drawing, the contact seat two 601 is rotatably mounted within the inner cavity of the housing 7. As shown in the attached Figure 23 and 24 drawing, the contact seat two 601 is linked with the third transmission gear 504 and can rotate in the reverse direction driven by the third transmission gear 504. Specifically, the contact seat two 601 is meshed and linked with the third transmission gear 504. The second moving contact 602 is fixedly installed on the contact seat two 601 and can rotate synchronously with the contact seat two 601. Specifically, the contact seat two 601 is rotatably mounted on the back of the partition plate 7c within the rear chamber 7b via the fourth positioning rod 603. The second moving contact 602 is fixedly installed on the contact seat two 601 via the fixed torsion spring two 604 and can rotate synchronously with the contact seat two 601.

[0072] Rotate the handle 1 to switch the circuit breaker from the open state as shown in the attached Figures 25 - 28 drawing to the closed state as shown in the attached Figures 29 - 32 drawing. The handle 1 drives the lock catch 303, the trip catch 302, the mechanism base 301 and the contact seat one 401 to rotate synchronously. The contact seat one 401 drives the first moving contact 404 to rotate. The first moving contact 404 contacts the first static contact 8, and the product is connected. The contact seat one 401 simultaneously drives the first transmission gear 501 to rotate. The first transmission gear 501 drives the second transmission gear 502 to rotate. The second transmission gear 502 drives the third transmission gear 504 to rotate. The third transmission gear 504 drives the contact seat two 601 to rotate. The second moving contact 602 rotates synchronously with the contact seat two 601. The second moving contact 602 contacts the second static contact 9. The first moving contact 404 and the second moving contact 602 rotate along the same rotation center with the same angular velocity. The first moving contact 404 and the second moving contact 602 are in a scissor shape.

[0073] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0074] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A double-contact circuit breaker, characterized in that: It includes a first moving contact assembly (4) and a second moving contact assembly (6). The first moving contact assembly (4) and the second moving contact assembly (6) can rotate around the rotation center under the drive of the operating mechanism, and the rotation directions of the first moving contact assembly (4) and the second moving contact assembly (6) are opposite during the rotation around the rotation center.

2. The double-contact circuit breaker according to claim 1, characterized in that: The operating mechanism includes a handle (1). The handle (1) is connected to the mechanism assembly (3) through a connecting rod (2). The handle (1) can drive the mechanism assembly (3) to rotate through the connecting rod (2). During the rotation of the mechanism assembly (3), it can drive the first moving contact assembly (4) installed together with it to rotate. The first moving contact assembly (4) is linked with the second moving contact assembly (6) through a transmission mechanism (5). During the rotation of the first moving contact assembly (4), it can drive the second moving contact assembly (6) to rotate synchronously through the transmission mechanism (5). The rotation directions of the first moving contact assembly (4) and the second moving contact assembly (6) are opposite.

3. A double-contact circuit breaker according to claim 1 or 2, characterized in that: The first moving contact assembly (4) and the second moving contact assembly (6) rotate at the same angular velocity.

4. The double-contact circuit breaker according to claim 2, wherein: The first moving contact assembly (4) and the second moving contact assembly (6) are arranged along the width direction with respect to the rotation center, and the handle (1), the mechanism assembly (3), and the arc extinguishing chamber are arranged along the height direction.

5. The double-contact circuit breaker according to claim 2, wherein: The first moving contact assembly (4) includes a first contact seat (401). The first contact seat (401) is rotatably installed on the inner cavity surface of the housing (7). The first contact seat (401) is pivotally installed on the mechanism seat (301). A first return torsion spring (402) is arranged between the first contact seat (401) and the housing (7) to reset the first contact seat (401). A first linkage return torsion spring (403) is arranged between the first contact seat (401) and the mechanism seat (301) to drive the rotation of the first contact seat (401) and the reset of the mechanism seat (301). A first moving contact (404) is fixedly installed on the first contact seat (401) and can move synchronously with the first contact seat (401). A first gear linkage part (401d) is arranged at the corresponding position of the first contact seat (401) to be linked with the transmission mechanism (5).

6. The double-contact circuit breaker according to claim 5, characterized in that: A cylinder (401a) protrudes from the first contact seat (401). A circular hole (701) is arranged at the corresponding position on the inner cavity surface of the housing (7) for the cylinder (401a). The cylinder (401a) is installed in the circular hole (701) so that the first contact seat (401) is rotatably installed in the inner cavity of the housing (7). The first return torsion spring (402) is installed in a torsion spring groove (702) on the inner cavity surface of the housing (7). One end abuts against the limit wall (401b) on the first contact seat (401), and the other end is placed in a limit card slot (703) on the inner cavity surface of the housing (7).

7. A double-contact circuit breaker according to claim 6, characterized in that: The mechanism base (301) is pivotally mounted on a cylindrical protrusion (401c) on the side of the contact base one (401) opposite to the cylinder (401a). The linkage return torsion spring one (403) is mounted on the cylindrical protrusion (401c), with one end clamped in the first card slot (301a) on the mechanism base (301), and the other end clamped in the corresponding second card slot (301b) on the mechanism base (301) and the third card slot (401e) on the contact base one (401).

8. The double-contact circuit breaker according to claim 6, characterized in that: The inner cavity of the housing (7) is divided into a front chamber (7a) and a rear chamber (7b) by a partition (7c). A round hole (701) is provided at the position corresponding to the cylinder (401a) on the front surface of the partition (7c). The cylinder (401a) is installed in the round hole (701) so that the contact base one (401) can be rotatably installed in the front chamber (7a). The return torsion spring one (402) is installed in the torsion spring slot (702) on the front surface of the partition (7c), with one end abutting against the limit wall (401b) on the contact base one (401), and the other end placed in the limit card slot (703) on the front surface of the partition (7c).

9. A double-contact circuit breaker according to claim 5, characterized in that: The transmission mechanism (5) includes a first transmission gear (501). The first transmission gear (501) is linked with the first gear linkage part (401d) and can rotate under the drive of the contact base one (401). The rotation direction of the first transmission gear (501) is opposite to that of the contact base one (401). The first transmission gear (501) is rotatably installed in the inner cavity of the housing (7). The second transmission gear (502) is rotatably installed in the inner cavity of the housing (7). The second transmission gear (502) and the first transmission gear (501) are connected by a transmission rod (503). The first transmission gear (501) drives the second transmission gear (502) to rotate in the same direction through the transmission rod (503). The third transmission gear (504) is rotatably installed in the inner cavity of the housing (7). The third transmission gear (504) is linked with the second transmission gear (502) and can rotate in the opposite direction under the drive of the second transmission gear (502).

10. A double-contact circuit breaker according to claim 9, characterized in that: The first transmission gear (501) is rotatably installed on the front surface of the partition (7c) in the front chamber (7a) through a first positioning rod (505). The second transmission gear (502) is rotatably installed on the back surface of the partition (7c) in the rear chamber (7b) through a second positioning rod (506). The transmission rod (503) passes through the waist-shaped hole on the partition (7c) and is connected to the first transmission gear (501) and the second transmission gear (502). The movement stroke of the transmission rod (503) is limited by the waist-shaped hole. The third transmission gear (504) is rotatably installed on the back surface of the partition (7c) in the rear chamber (7b) through a third positioning rod (507).

11. A double-contact circuit breaker according to claim 2, characterized in that: The moving contact assembly two (6) includes a contact seat two (601), the contact seat two (601) is rotatably installed in the inner cavity of the housing (7), the contact seat two (601) is linked with the transmission gear three (504) and can rotate reversely under the drive of the transmission gear three (504), and the moving contact two (602) is fixedly installed on the contact seat two (601) and can rotate synchronously with the contact seat two (601).

12. A double-contact circuit breaker according to claim 11, characterized in that: The contact seat two (601) is rotatably installed on the back of the partition plate (7c) in the rear chamber (7b) through a positioning rod four (603), and the moving contact two (602) is fixedly installed on the contact seat two (601) through a fixing torsion spring two (604) and can rotate synchronously with the contact seat two (601).

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