Contact system and circuit breaker

Abstract

The application provides a contact system and a circuit breaker, and relates to the technical field of electrical equipment. The contact system comprises a first static contact, a second static contact, a moving contact and a contact support. The first static contact and the second static contact are arranged at intervals along a first direction. The moving contact has a first moving contact point and a second moving contact point. The moving contact is installed on the contact support and can rotate relative to the contact support along a first rotating direction. The contact support is used for driving the moving contact to rotate along a second rotating direction, so that the moving contact is close to or far away from the first static contact. When only one of the first static contact and the second static contact cooperates with the moving contact, the moving contact can rotate relative to the contact support, so that the other of the first static contact and the second static contact cooperates with the moving contact. In this way, the consistency of the moving contact contacting the first static contact and the second static contact can be improved, and the reliability of the contact system and the circuit breaker with the contact system can be improved.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a contact system and circuit breaker. Background Technology

[0002] With the continuous development of circuit breaker technology, the performance requirements for circuit breakers are also constantly increasing. In order to improve the overall performance of circuit breakers, double-break circuit breakers have emerged. This type of circuit breaker uses the principle of series voltage division to reduce the energy carried by a single set of contacts, and has significant improvements in breaking capacity and adaptability to high-voltage scenarios.

[0003] A double-break circuit breaker includes two sets of moving and stationary contacts, which can simultaneously engage or disengage. However, simultaneously opening and closing both sets of contacts is difficult, thus reducing the reliability of the circuit breaker. Especially after long-term use, the wear levels between the two sets of moving and stationary contacts may differ, further reducing the reliability of the circuit breaker. Utility Model Content

[0004] This application provides a contact system and circuit breaker that can improve the reliability of circuit breaker operation.

[0005] In a first aspect, this application provides a contact system having intersecting first and second directions. The contact system includes a first stationary contact, a second stationary contact, a moving contact, and a contact support. The first and second stationary contacts are spaced apart along the first direction. The moving contact has a first moving contact point and a second moving contact point, the first moving contact point cooperating with the first stationary contact, and the second moving contact point cooperating with the second stationary contact. The moving contact is mounted on the contact support and is rotatable relative to the contact support along a first rotation direction. The contact support drives the moving contact to rotate along a second rotation direction, causing the moving contact to move closer to or away from the first stationary contact. The axis of the first rotation direction is collinear with the second direction, and the axis of the second rotation direction is collinear with the first direction.

[0006] When only one of the first stationary contact and the second stationary contact is engaged with the moving contact, the moving contact can rotate relative to the contact support so that the other of the first stationary contact and the second stationary contact is engaged with the moving contact.

[0007] In this embodiment, the moving contact is rotatably mounted on the contact bracket. Thus, the moving contact can rotate in a first rotation direction according to its engagement with the first and second stationary contacts, causing the first moving contact to contact the first stationary contact and the second moving contact to contact the second stationary contact, thereby achieving the connection of the contact assembly. This improves the consistency of the moving contact's contact with the first and second stationary contacts, enhancing the reliability of the contact system and the circuit breaker equipped with the contact system.

[0008] Optionally, the moving contact includes a first side plate, a second side plate, and a connecting plate, with the first and second side plates spaced apart and connected to the connecting plate. A first moving contact is disposed on the first side plate, and a second moving contact is disposed on the second side plate. The contact system also includes a rotating shaft extending along a second direction. A first mounting hole is provided on the connecting plate, and a second mounting hole is provided on the contact bracket. The rotating shaft passes through the first mounting hole and the second mounting hole.

[0009] Thus, the moving contact and the contact support can be rotatably connected by a rotating shaft, so that the first moving contact can contact the first stationary contact, and the second moving contact can contact the second stationary contact.

[0010] Optionally, the second mounting hole is a stepped hole, which includes a through hole and a countersunk hole that are interconnected. A positioning boss is provided in the middle of the rotating shaft, and the positioning boss is arranged around a second direction. In the second direction, a first limiting platform and a second limiting platform are respectively connected to both ends of the rotating shaft. The positioning boss is embedded in the countersunk hole. The part of the rotating shaft located on the side away from the contact support passes through the first mounting hole. The first limiting platform abuts against the moving contact. The part of the rotating shaft located on the side away from the moving contact passes through the through hole. The second limiting platform abuts against the contact support.

[0011] In this way, when installing the moving contact, contact bracket, and rotating shaft, the positioning boss can be embedded in the countersunk hole to achieve the positioning of the rotating shaft, reducing the possibility that the position of the rotating shaft in the moving contact and contact bracket is not fixed, which may lead to the difficulty in connecting the moving contact and contact bracket.

[0012] Optionally, in the second direction, guide ramps are provided on both sides of the positioning boss.

[0013] With the above settings, when installing the rotating shaft, the positioning boss can slide into the countersunk hole along the guide slope to properly cooperate with the contact bracket, reducing the adjustment required during the installation of the rotating shaft and lowering the installation difficulty.

[0014] Optionally, both the first limiting platform and the second limiting platform are formed by riveting together a rotating shaft.

[0015] This facilitates the formation of the first and second limiting stages, reducing the possibility of increased parts and costs due to additional structures.

[0016] Optionally, a limiting boss is connected to the side of the contact bracket facing the moving contact. After the moving contact rotates at a preset angle relative to the contact, the first side plate or the second side plate can abut against the limiting boss.

[0017] In this way, the limiting boss can limit the rotation angle of the moving contact, reducing the possibility of excessive rotation of the moving contact during the process of the contact support driving the moving contact to rotate.

[0018] Optionally, the contact system also includes a contact support. The side of the contact bracket facing away from the moving contact has mounting space, and the contact support is embedded in the mounting space facing the moving contact and connected to the contact bracket. The contact support is used to drive the contact bracket to rotate in a second rotational direction.

[0019] Thus, the moving contact can be connected to the contact support via the contact bracket. The contact support can provide a driving force to the moving contact via the contact bracket, so that the moving contact can be rotated in the second rotation direction via the contact bracket, causing the moving contact to move closer to or away from the first stationary contact and the second stationary contact.

[0020] Optionally, the contact support includes a mounting part, a first mounting plate, and a second mounting plate. The first mounting plate and the second mounting plate are connected at intervals on the side of the mounting part facing the moving contact. The first mounting plate and the second mounting plate are embedded in the mounting space. A stop is provided on the first mounting plate and / or the second mounting plate.

[0021] The contact system also includes a torsion spring and a mounting shaft extending in a first direction. The mounting shaft passes through a first mounting plate, a second mounting plate, and a contact bracket. The torsion spring is sleeved on the mounting shaft. One torsion arm of the torsion spring abuts against the mounting portion, and the other torsion arm of the torsion spring abuts against the contact bracket, so that the contact bracket abuts against the stop table.

[0022] In this way, the fit between the contact support and the contact bracket is a static fit, which makes it easier for the contact support to drive the moving contact to rotate and reduces the possibility of damage to the contact bracket and the contact support.

[0023] Optionally, the contact system also includes an elastic element, one end of which is sleeved on the mounting shaft, and the other end of which is used to mount on the base. When the contact support rotates relative to the base in a second rotation direction to make the moving contact engage with the first stationary contact and the second stationary contact, the mounting shaft stretches the elastic element.

[0024] With the above configuration, the elastic element can store elastic potential energy when the moving contact is engaged with the first and second stationary contacts. Thus, when the moving contact separates from the first and second stationary contacts, the elastic element can release this elastic potential energy, providing a driving force for the contact support.

[0025] Secondly, this application provides a circuit breaker including any of the contact systems described in the first aspect above.

[0026] The beneficial effects of the circuit breakers provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0027] Figure 1This is a schematic diagram of a circuit breaker according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of a circuit breaker after the cover has been removed, according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of a contact system according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the cooperation between a moving contact and a contact support according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of a moving contact according to an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of a contact support according to an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of a rotating shaft according to an embodiment of this application.

[0034] Figure 8 This is a schematic diagram of a contact bracket and a contact support cooperating according to an embodiment of this application.

[0035] Figure 9 This is a schematic diagram of a contact support according to an embodiment of this application.

[0036] Figure 10 This is a schematic diagram of the contact bracket and contact support cooperating from another perspective of an embodiment of this application.

[0037] Figure 11 This is a schematic diagram of a torsion spring according to an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100: Contact system; 101: First stationary contact; 102: Second stationary contact; 10: Moving contact; 11: First moving contact; 12: Second moving contact; 13: First side plate; 14: Second side plate; 15: Connecting plate; 151: First mounting hole; 20: Contact bracket; 21: Second mounting hole; 211: Through hole; 212: Countersunk hole; 22: Third mounting hole; 23: Limiting boss; 24: Mounting space; 30: Rotating shaft; 31: Positioning boss; 32: Gasket; 3 3: Riveting groove; 40: Contact support; 41: Mounting part; 42: First mounting plate; 43: Second mounting plate; 44: Stop platform; 50: Torsion spring; 51: First pin; 52: First spring coil; 53: Second pin; 54: Second spring coil; 55: Third pin; 60: Mounting shaft; 70: Elastic element; 200: Circuit breaker; 201: Base; 202: Cover; 203: Handle; X: First direction; Y: Second direction; A: First rotation direction; C: Second rotation direction. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0042] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0046] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0047] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, "connection" or "linkage" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In circuit structures, "connection" or "linkage" can refer not only to a physical connection but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate element, as long as the circuit is connected; it can also refer to the internal connection of two elements. A signal connection can refer not only to a signal connection through a circuit but also to a signal connection through a medium, such as radio waves. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0049] For example, such as Figure 1 and Figure 2 As shown in the figure, this application embodiment proposes a circuit breaker 200, which includes a contact system 100.

[0050] A circuit breaker 200 is an electrical component that protects a circuit. It can automatically disconnect the circuit when an abnormality occurs, reducing the possibility of damage to equipment in the circuit or even causing a fire.

[0051] In the circuit breaker 200 equipped with the aforementioned contact system 100, the circuit breaker 200 can connect or disconnect the circuit through the contact system 100. The arrangement of the contact system 100 in this application can make the operation of the circuit breaker 200 more reliable and improve the overall performance of the circuit breaker 200.

[0052] The contact system 100 provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0053] Reference Figure 2 and Figure 3 As shown, this application provides a contact system 100, which has intersecting first direction X and second direction Y. The contact system 100 includes a first stationary contact 101, a second stationary contact 102, a moving contact 10, and a contact support 20. The first stationary contact 101 and the second stationary contact 102 are spaced apart along the first direction X. The moving contact 10 has a first moving contact 11 and a second moving contact 12. The first moving contact 11 is used to cooperate with the first stationary contact 101, and the second moving contact 12 is used to cooperate with the second stationary contact 102. The moving contact 10 is mounted on the contact support 20 and can rotate relative to the contact support 20 along a first rotation direction A. The contact support 20 is used to drive the moving contact 10 to rotate along a second rotation direction C, so that the moving contact 10 moves closer to or away from the first stationary contact 101. The axis of the first rotation direction A is collinear with the second direction Y, and the axis of the second rotation direction C is collinear with the first direction X.

[0054] In this embodiment of the application, the moving contact 10 has a first moving contact 11 and a second moving contact 12. The first moving contact 11 can cooperate with the first stationary contact 101, and the second moving contact 12 can cooperate with the second stationary contact 102, so that the contact system 100 can connect the circuit where the circuit breaker 200 is located.

[0055] The contact system 100 proposed in this application also includes a contact bracket 20, through which the moving contact 10 can be installed. Furthermore, the moving contact 10 can rotate along the second rotation direction C under the drive of the contact bracket 20, thereby facilitating the cooperation between the moving contact 10 and the first stationary contact 101, and between the moving contact 10 and the second stationary contact 102.

[0056] Furthermore, the moving contact 10 can also rotate relative to the contact support 20 along the first rotation direction A with the straight line containing the second direction Y as its axis. Since the first direction X intersects the second direction Y, the relative positions between the first moving contact 11 and the first stationary contact 101, and between the second moving contact 12 and the second stationary contact 102, can change when the moving contact 10 rotates relative to the support. In this way, when only one of the first stationary contact 101 and the second stationary contact 102 is engaged with the moving contact 10, the moving contact 10 can rotate relative to the contact support 20, thereby allowing the other of the first stationary contact 101 and the second stationary contact 102 to engage with the moving contact 10.

[0057] In summary, in this embodiment, the moving contact 10 is rotatably mounted on the contact support 20. Thus, the moving contact 10 can rotate along the first rotation direction A according to its cooperation with the first stationary contact 101 and the second stationary contact 102, so that the first moving contact 11 contacts the first stationary contact 101, and the second moving contact 12 contacts the second stationary contact 102, thereby achieving the connection of the contact assembly. The arrangement of the moving contact 10 and the contact support 20 in this application can improve the consistency of the moving contact 10's contact with the first stationary contact 101 and the second stationary contact 102, reducing the possibility that the first moving contact 11 contacts the first stationary contact 101 while the second moving contact 12 cannot contact the second stationary contact 102, or that the second moving contact 12 contacts the second stationary contact 102 while the first moving contact 11 cannot contact the first stationary contact 101.

[0058] Especially after prolonged use of the contact system 100, wear will occur between the first moving contact 11 and the first stationary contact 101, and also between the second moving contact 12 and the second stationary contact 102, and the wear conditions at these two locations may differ. The contact system 100 proposed in this application can also adapt well to the aforementioned wear conditions. Please refer to the following description for details.

[0059] For ease of explanation, the first moving contact 11 and the first stationary contact 101, the second moving contact 12, and the second stationary contact 102 are referred to as contact pairs. When the wear of the two contact pairs differs, the opening distance between the first moving contact 11 and the first stationary contact 101, and the opening distance between the second moving contact 12 and the second stationary contact 102, will differ when the circuit breaker 200 is tripped.

[0060] Thus, when the circuit breaker 200 switches from open to closed, the pair of contacts with the smaller opening distance can make contact first. At this time, the other pair of contacts has not yet made contact. The moving contact 10 can rotate relative to the contact support 20 so that the other pair of contacts also makes contact. In this way, the relative rotation between the moving contact 10 and the contact support 20 can compensate for the difference in opening distance between the two pairs of contacts, reducing the possibility of one-sided contact caused by the difference in opening distance between the two pairs of contacts, which would prevent the circuit breaker 200 from closing normally.

[0061] That is, the contact system 100 proposed in this application embodiment can improve the stability of the contact between the two sets of contacts, improve the reliability of the contact system 100 and the circuit breaker 200 equipped with the contact system 100, and reduce the difficulty of the moving contact 10 contacting the first stationary contact 101 and the second stationary contact 102 at the same time.

[0062] Wherein, the first direction X intersects with the second direction Y, and the first direction X and the second direction Y can have an angle of approximately 90°, so that when the moving contact 10 rotates along the first rotation direction A, the angle between the first moving contact 11 and the second moving contact 12 on both sides and the first direction X can be changed, so that the first moving contact 11 can contact the first stationary contact 101, and the second moving contact 12 can contact the second stationary contact 102.

[0063] In this embodiment, the included angle can be 78°, 80°, 87°, or 94°, etc. As a preferred embodiment, the first direction X and the second direction Y can be perpendicular to each other. This way, when the moving contact 10 rotates, the first moving contact 11 can perpendicularly approach and contact the first stationary contact 101. Alternatively, the second moving contact 12 can perpendicularly approach and contact the second stationary contact 102. This ensures more reliable contact between the first moving contact 11 and the first stationary contact 101, and between the second moving contact 12 and the second stationary contact 102. The specific angle value between the first direction X and the second direction Y is not specifically limited in this embodiment.

[0064] It should be noted that the first stationary contact 101 is provided with a first stationary contact point, and the second stationary contact 102 is provided with a second stationary contact point. When the first moving contact 11 contacts the first stationary contact 101, specifically, the first moving contact 11 contacts the first stationary contact point. When the second moving contact 12 contacts the second stationary contact 102, specifically, the second moving contact 12 contacts the second stationary contact point.

[0065] It should also be noted that the circuit breaker 200 may also include a handle 203, such as Figure 1 and Figure 2 As shown. Combined with Figure 3 The handle 203 can cooperate with the contact support 20. After receiving a user's operation, the handle 203 can drive the contact support 20 to rotate along the second rotation direction C. Generally, to ensure stable and reliable closing of the circuit breaker 200, the circuit breaker 200 is designed with overtravel capability. That is, after the circuit breaker 200 is closed, the handle 203 will continue to rotate under the user's operation, exerting a force on the contact support 20. In this embodiment, the handle 203 can drive the contact support 20 to drive the moving contact 10 to rotate along the second rotation direction C, and after the moving contact 10 wears, drive the moving contact 10 to rotate along the first rotation direction A.

[0066] Specifically, the following description will use the example of minimal wear between the first moving contact 11 and the first stationary contact 101 for detailed explanation. When the handle 203 receives a user's operation to switch the circuit breaker 200 from open to closed, the handle 203 can first drive the contact support 20 to rotate, causing the first moving contact 11 and the second moving contact 12 to make contact first. However, the movement of the handle 203 under the user's operation has not ended. At this time, the handle 203 still exerts a pushing force on the contact support 20, so that the contact support 20 still has a tendency to drive the moving contact 10 to rotate along the second rotation direction C.

[0067] At this point, because the first stationary contact 101 has a pushing effect on the first moving contact 10, the contact support 20 and the moving contact 10 as a whole can no longer continue to rotate in the second rotation direction C. Since the moving contact 10 and the contact support 20 are rotatably connected, the moving contact 10 will rotate relative to the contact support 20 in the first rotation direction A under the action of the handle 203, so that the second moving contact 12 approaches the second stationary contact 102 and then makes contact with the second stationary contact 102. This completes the closing of the circuit breaker 200.

[0068] When the circuit breaker 200 switches from closing to opening, the handle 203 can drive the contact support 20 and the moving contact 10 to rotate in the second rotation direction C, thereby causing the first moving contact 10 to separate from the first stationary contact 101, and the second moving contact 10 to separate from the second stationary contact 102, until the movement of the handle 203 ends. During this process, after both the first stationary contact 101 and the second stationary contact 102 have separated from the moving contact 10, the moving contact 10 is in a free state. It can maintain its relative positional relationship with the contact support 20 when closing, or it can rotate relative to the contact support 20 under the influence of the circuit breaker 200's orientation, gravity, and other factors, without affecting the subsequent closing process.

[0069] In some embodiments, such as Figure 3 and Figure 4 As shown, the moving contact 10 may include a first side plate 13, a second side plate 14, and a connecting plate 15, with the first side plate 13 and the second side plate 14 spaced apart from each other on the connecting plate 15. In this way, the moving contact 10 can form a U-shaped structure, which facilitates the placement of a first moving contact 11 and a second moving contact 12 on the moving contact 10. Specifically, the first moving contact 11 is disposed on the first side plate 13, and the second moving contact 12 is disposed on the second side plate 14.

[0070] like Figures 3 to 6 As shown, the contact system 100 also includes a rotating shaft 30 extending along the second direction Y. A first mounting hole 151 is provided on the connecting plate 15, and a second mounting hole 21 is provided on the contact bracket 20. The rotating shaft 30 passes through the first mounting hole 151 and the second mounting hole 21. Thus, the moving contact 10 and the contact bracket 20 can be rotatably connected via the rotating shaft 30. Since the rotating shaft 30 extends along the second direction Y, the moving contact 10 can rotate relative to the contact bracket 20 along the first rotation direction A, so that the first moving contact 11 contacts the first stationary contact 101, and the second moving contact 12 contacts the second stationary contact 102.

[0071] In some embodiments, such as Figure 6 As shown, the second mounting hole 21 is a stepped hole, which may include a through hole portion 211 and a countersunk hole portion 212 that are interconnected. In this way, a positioning surface is formed at the transition between the through hole portion 211 and the countersunk hole portion 212, which can be used to position the rotating shaft 30.

[0072] Specifically, such as Figure 4 , Figure 6 and Figure 7As shown, a positioning boss 31 is provided in the middle of the rotating shaft 30, and the positioning boss 31 is arranged around the second direction Y. In this way, when installing the moving contact 10, the contact bracket 20 and the rotating shaft 30, the positioning boss 31 can be embedded in the countersunk hole 212 and make the positioning boss 31 abut against the positioning surface, thereby realizing the positioning of the rotating shaft 30. This reduces the possibility that the position of the rotating shaft 30 in the moving contact 10 and the contact bracket 20 is not fixed, which would make it difficult to connect the moving contact 10 and the contact bracket 20.

[0073] In addition, in this embodiment of the application, in the second direction Y, the two ends of the rotating shaft 30 are respectively connected to a first limiting platform and a second limiting platform (not shown in the figure). The part of the rotating shaft 30 located on the side away from the contact bracket 20 passes through the first mounting hole 151, the first limiting platform abuts against the moving contact 10, the part of the rotating shaft 30 located on the side away from the moving contact 10 passes through the through hole 211, and the second limiting platform abuts against the contact bracket 20.

[0074] With the above settings, after the rotating shaft 30 is embedded in the first mounting hole 151 and the second mounting hole 21, the first limiting platform and the second limiting platform can limit the rotating shaft 30, so that the rotating shaft 30 can be kept between the moving contact 10 and the contact support 20, reducing the possibility of the rotating shaft 30 coming out of the first mounting hole 151 and the second mounting hole 21, thereby making the connection between the moving contact 10 and the contact support 20 fail.

[0075] It should be noted that, in this embodiment, the countersunk hole 212 at the second mounting hole 21 can be located on the side closer to the moving contact 10. In this case, the rotating shaft 30 can be installed from the side where the moving contact 10 is located to the side where the contact support 20 is located. Alternatively, the countersunk hole 212 can also be located on the side away from the moving contact 10. In this case, the rotating shaft 30 can be installed from the side where the contact support 20 is located to the side where the moving contact 10 is located.

[0076] It should also be noted that a first limiting platform can be formed on the rotating shaft 30 before installation, at which time the countersunk hole 212 is located on the side closer to the moving contact 10. After the rotating shaft 30 is installed, the positioning boss 31 abuts against the positioning surface, and the first limiting platform abuts against the moving contact 10. Then, the portion of the rotating shaft 30 extending out of the through hole 211 can be processed to form a second limiting platform. Of course, a second limiting platform can also be formed on the rotating shaft 30 before installation, and the first limiting platform can be formed after the rotating shaft 30 is installed. This will not be described in detail in the embodiments of this application.

[0077] Alternatively, both the first and second limiting platforms can be formed after the rotating shaft 30 passes through the first mounting hole 151 and the second mounting hole 21. For example, after the rotating shaft 30 passes through the first mounting hole 151 and the second mounting hole 21, and the positioning boss 31 abuts against the positioning surface, the two ends of the rotating shaft 30 can be processed to form the first and second limiting platforms respectively.

[0078] The embodiments of this application do not specifically limit the form of the first and second limiting platforms, nor the installation sequence of the rotating shaft 30, and can be selected according to the actual situation. In the following description, the example is that the rotating shaft 30 is first inserted into the first mounting hole 151 and the second mounting hole 21, and then the first and second limiting platforms are formed.

[0079] In this embodiment, the first limiting stage and the second limiting stage can be formed in different ways. For example, both the first limiting stage and the second limiting stage can be riveted together by the rotating shaft 30. This facilitates the formation of the first limiting stage and the second limiting stage, reducing the possibility of increased parts and costs due to additional structures.

[0080] Here, we will take the example of the first and second limiting platforms being formed by riveting as an example for detailed explanation. After the rotating shaft 30 passes through the first mounting hole 151 and the second mounting hole 21, the portion of the rotating shaft 30 extending out of the first mounting hole 151 and the portion of the rotating shaft 30 extending out of the second mounting hole 21 can be riveted to deform these two portions of the rotating shaft 30 in the radial direction, thereby limiting the rotation shaft 30.

[0081] In this way, the riveting process is relatively fast and the connection efficiency is high. On the other hand, this arrangement of the present application can also process the rotating shaft 30 using double-head riveting technology. In this way, the portion of the rotating shaft 30 extending out of the first mounting hole 151 and the portion of the rotating shaft 30 extending out of the second mounting hole 21 can be riveted simultaneously, so as to form the first limiting platform and the second limiting platform in one process, thereby improving processing efficiency and reducing the application of complex processes that require processing on both sides and turning over in the middle.

[0082] It should be noted that, for ease of riveting, riveting grooves 33 can be provided at both ends of the rotating shaft 30. For example... Figure 6 As shown. When the rotating shaft 30 is riveted using a punch or similar device, the rotating shaft 30, under force, can easily expand outward along the contour of the riveting groove 33, allowing the groove wall of the riveting groove 33 to deform outward and form a flange. This flange can then serve as a first or second limiting platform for connection.

[0083] It is understood that riveting methods can include other methods besides the aforementioned punch riveting. For example, spin riveting and split riveting, etc. The first and second limiting platforms can also be formed by spin riveting or split riveting. In this regard, the embodiments of this application do not specifically limit the methods.

[0084] Of course, the first limiting platform and the second limiting platform can also be formed in other ways. For example, the end of the rotating shaft 30 can be provided with a thread, and both the first limiting platform and the second limiting platform can be nuts. The first limiting platform and the second limiting platform can be screwed on at both ends of the rotating shaft 30 and limit the rotating shaft 30 in the second direction Y.

[0085] It should also be noted that, such as Figure 4 and Figure 6 As shown, the contact support 20 may also be provided with a third mounting hole 22, which communicates with the second mounting hole 21, specifically with the through hole 211. The third mounting hole 22 and the countersunk hole 212 are located on opposite sides of the contact support 20 in the second direction Y.

[0086] In this way, after the mounting shaft 60 passes through the contact bracket 20 and the moving contact 10, the flange (i.e., the second limiting platform) formed by punching and riveting the portion of the mounting shaft 60 extending out of the contact bracket 20 can be located in the third mounting hole 22. This reduces the space occupied by the second limiting platform on the side of the contact bracket 20 away from the moving contact 10, allowing other components to be installed on that side of the contact bracket 20.

[0087] In addition, such as Figure 4 As shown, a shim 32 may be provided between the first limiting platform and the moving contact 10, and / or between the second limiting platform and the contact support 20. The shim 32 can buffer impacts, protect the first limiting platform and / or the second limiting platform, and reduce wear on the end faces of the first limiting platform and / or the second limiting platform, which may lead to a large circumferential clearance between the moving contact 10 and the contact support 20.

[0088] In some embodiments, guide ramps may be provided on both opposite sides of the positioning boss 31 in the second direction Y. The guide ramps can guide the rotating shaft 30 during installation, which facilitates the embedding of the positioning boss 31 in the countersunk hole 212.

[0089] In this application, the positioning boss 31 can be beveled on both sides in the second direction Y to form a guide slope. When installing the rotating shaft 30, the positioning boss 31 can slide along the guide slope into the countersunk hole 212 to properly mate with the contact bracket 20, reducing the adjustment required during the installation of the rotating shaft 30 and lowering the installation difficulty.

[0090] Furthermore, since guide ramps are provided on both sides of the positioning boss 31, the direction of the rotating shaft 30 does not need to be distinguished during the installation process. Specifically, the two opposite ends along the axial direction of the rotating shaft 30 are referred to as the first end and the second end, respectively. When the rotating shaft 30 is installed from the side where the driven contact 10 is located to the side where the contact support 40 is located, the first end can be aligned with the first mounting hole 151, or the second end can be aligned with the first mounting hole 151. Both methods can provide good guidance for the rotating shaft 30 and prevent mistakes.

[0091] It is understandable that the rotating shaft 30 can be a centrally symmetrical structure. This means that the dimensions of the rotating shaft 30 on both sides of the positioning boss 31 are identical. Thus, when the rotating shaft 30 is installed in different directions, the dimensions of the portion of the rotating shaft 30 extending from the moving contact 10 and the portion extending from the contact support 20 are identical, facilitating the formation of the first and second limiting platforms. This allows it to cooperate with the positioning boss 31, which has guide ramps on both sides, further enhancing the error-proofing effect.

[0092] In some embodiments, such as Figure 4 and Figure 6 As shown, a limiting boss 23 can be connected to the side of the contact bracket 20 facing the moving contact 10. After the moving contact 10 rotates at a preset angle relative to the contact bracket 20, the first side plate 13 or the second side plate 14 can abut against the limiting boss 23.

[0093] Thus, the limiting boss 23 can restrict the rotation angle of the moving contact 10, reducing the possibility that the moving contact 10 might rotate excessively during the rotation of the moving contact 10 driven by the contact support 20, causing a pair of contacts to fail to make contact. It also ensures that compensation for contact wear is within a safe range. For example, when the contact system 100 reaches its service life and the contact pairs are excessively worn, the moving contact 10 can rotate a preset angle before being restricted by the limiting boss 23, preventing both pairs of contacts from simultaneously connecting. This reduces the possibility that continued use of the circuit breaker 200 would pose a significant safety risk.

[0094] It should be noted that the rotation of the moving contact 10 relative to the contact support 20 has different directions. For example... Figure 4 As shown, the moving contact 10 can rotate clockwise or counterclockwise around the axis of the rotating shaft 30. In order to compensate for the wear of both sets of contact pairs by the rotation of the moving contact 10, the first side plate 13 can be set to abut against the limiting boss 23 after the moving contact 10 rotates counterclockwise by a preset angle, and the second side plate 14 can be set to abut against the limiting boss 23 after the moving contact 10 rotates clockwise by a preset angle.

[0095] It should also be noted that the preset angle can be 8°, 7.5°, 7°, 6°, 5.7°, or 5° to 7°, etc. The size of the preset angle here refers to the angle by which the moving contact 10 can rotate in one direction. That is, when the preset angle is 7°, after the moving contact 10 rotates counterclockwise by 7°, the first side plate 13 abuts against the limiting boss 23, and after the moving contact 10 rotates clockwise by 7°, the second side plate 14 abuts against the limiting boss 23.

[0096] Of course, the clockwise rotation angle and the counterclockwise rotation angle of the moving contact 10 can also be different. For example, in the circuit breaker 200, if a certain pair of contacts is under more severe operating conditions, such as the arcs generated by the two pairs of contacts entering the grid plates at different rates, resulting in one pair of contacts having a longer arcing time, the wear of the pair of contacts with the longer arcing time will be relatively greater. In this case, the moving contact 10 can also be set to rotate at different angles in the two directions to compensate more for the pair of contacts with greater wear.

[0097] In this application, the size of the preset angle is not specifically limited. It can be set in detail according to parameters such as the service life of the product, so that the rotation of the moving contact 10 can compensate for the wear of the two sets of contact pairs during the service life of the circuit breaker 200, and the two sets of contact pairs can be stably connected.

[0098] In some embodiments, such as Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, the contact system 100 may further include a contact support 40. The side of the contact bracket 20 facing away from the moving contact 10 has a mounting space 24. The contact support 40 is embedded in the mounting space 24 on the side facing the moving contact 10 and is connected to the contact bracket 20. The contact support is used to drive the contact bracket 20 to rotate in the second rotation direction C.

[0099] Thus, the moving contact 10 can be connected to the contact support 40 via the contact bracket 20. The contact support 40 can provide a driving force to the moving contact 10 via the contact bracket 20, so that the moving contact 10 is rotated along the second rotation direction C via the contact bracket 20, causing the moving contact 10 to move closer to the first stationary contact 101 and the second stationary contact 102, or away from the first stationary contact 101 and the second stationary contact 102.

[0100] The contact support 20 may include a horizontal plate and two side connecting plates spaced apart along a first direction X. The two side connecting plates are spaced apart from the horizontal plate and together with the horizontal plate form an installation space 24. In this way, the horizontal plate and the two side connecting plates can also form a U-shaped structure to provide a position for connection with the contact support.

[0101] The aforementioned limiting boss 23 can be connected to one side of the connecting plate away from the horizontal plate, and the limiting boss 23 extends along the first direction X so that the limiting boss 23 can limit the moving contact 10 after the moving contact 10 rotates at a preset angle.

[0102] In some embodiments, such as Figure 3 , Figure 8 and Figure 9 As shown, the contact support 40 may include a mounting portion 41, a first mounting plate 42, and a second mounting plate 43. The first mounting plate 42 and the second mounting plate 43 are spaced apart and connected to the side of the mounting portion 41 facing the moving contact 10. In this way, the contact support 40 can also form a U-shaped structure. When connecting the contact support 40 and the contact bracket 20, both the first mounting plate 42 and the second mounting plate 43 can be embedded in the mounting space 24. The contact support 40 can be connected to the contact bracket 20 through the first mounting plate 42 and the second mounting plate 43.

[0103] Specifically, such as Figure 3 , Figure 8 and Figure 9 As shown, a stop plate 44 is provided on the first mounting plate 42 and / or the second mounting plate 43. The contact system 100 also includes a torsion spring 50 and a mounting shaft 60 extending along the first direction X. The mounting shaft 60 can pass through the first mounting plate 42, the second mounting plate 43 and the contact bracket 20. The torsion spring 50 is sleeved on the mounting shaft 60. One torsion arm of the torsion spring 50 abuts against the mounting part 41 and the other torsion arm of the torsion spring 50 abuts against the contact bracket 20 so that the contact bracket 20 abuts against the stop plate 44.

[0104] In this way, the mounting shaft 60 can connect the contact support 40 and the contact bracket 20, while the torsion spring 50 can apply force to both the contact support 40 and the contact bracket 20, causing them to tend to rotate relative to each other around the mounting shaft 60. Simultaneously, this allows the contact bracket 20 to abut tightly against the stop table 44, thus ensuring a static fit between the contact support 40 and the contact bracket 20.

[0105] With the above settings, when the contact support 40 is under force, the contact support 40 can drive the contact bracket 20 and the moving contact 10 to rotate in the second rotation direction C, which facilitates the transmission of driving force to the contact bracket 20 and reduces the possibility of relative movement between the contact bracket 20 and the contact support 40, which could cause the contact support 40 to be unable to drive the contact bracket 20 to rotate, and thus cause the circuit breaker 200 to be unable to open or close.

[0106] In cases where the contact system 100 also includes a contact support 40, the contact support 40 may specifically cooperate with the handle 203. After the handle 203 receives a user's operation, the handle 203 can drive the contact bracket 20 and the moving contact 10 to rotate along the second rotation direction C via the contact support 40.

[0107] The torsion spring 50 installed between the contact bracket 20 and the contact support 40 can accommodate the overtravel setting of the circuit breaker 200. Specifically, referring to the preceding description, when the handle 203 receives the user's operation and controls the circuit breaker 200 to switch from opening to closing, the handle 203 can first drive the contact support 10 to rotate along the second rotation direction C, so that the contact bracket 20 and the moving contact 10 can rotate along the second rotation direction C. Then, when only one set of contact pairs is in contact, the moving contact 10 can rotate relative to the contact bracket 20 along the first rotation direction A, so that both sets of contact pairs are connected.

[0108] At this time, the moving contact 10 and the contact support 20 can be limited by the first stationary contact 101 and the second stationary contact 102. If the movement of the handle 203 under the user's operation has not ended, the handle 203 can control the relative rotation between the contact support 40 and the contact support 20 about the mounting shaft 60, overcome the effect of the torsion spring 50 and squeeze the torsion spring 50, and reduce the possibility of damage to the contact support 40 and / or the contact support 20.

[0109] The process of controlling the circuit breaker 200 to switch from closing to opening after receiving the user's operation on the handle 203 is the reverse of the above process, and will not be described again in this embodiment.

[0110] In some embodiments, such as Figure 2 , Figure 3 , Figure 8 and Figure 10 As shown, the contact system 100 may also include an elastic element 70, one end of which is sleeved on the mounting shaft 60, and the other end of which is used to mount on the base 201. When the contact support 40 rotates relative to the base 201 in the second rotation direction C to make the moving contact 10 cooperate with the first stationary contact 101 and the second stationary contact 102, the mounting shaft 60 stretches the elastic element 70.

[0111] Thus, when the circuit breaker 200 controls the contact system 100 to close, the elastic element 70 can be stretched, and at this time, the elastic element 70 can store elastic potential energy. Then, when the circuit breaker 200 controls the contact system 100 to open, the elastic element 70 can retract under its own elastic force. At this time, the elastic element 70 can provide a drive for the contact support 40, so that the contact support 40 can drive the contact bracket 20 and the moving contact 10 to rotate away from the first stationary contact 101 and the second stationary contact 102.

[0112] In this embodiment, the other end of the elastic element 70 is mounted on the base, so that the elastic element 70 has a defined position in the circuit breaker 200, allowing the elastic element 70 to extend and retract and cooperate with the contacts to support the operation of 40. Specifically, a fixed shaft can be provided on the base 201, and the other end of the elastic element 70 can be sleeved on the fixed shaft to realize the installation of the elastic element 70 on the base 201. Alternatively, a hook can be provided on the base 201, and a pull ring can be provided on the other end of the elastic element 70, with the hook embedded in the pull ring, thus also realizing the installation of the elastic element 70 on the base 201. Alternatively, the other end of the elastic element 70 can also be directly connected to the base 201 to realize the installation of the elastic element 70. This embodiment does not specifically limit the specific implementation of the elastic element 70.

[0113] The base 201 provides mechanical support and protection for parts of the circuit breaker 200. Specifically, the circuit breaker 200 may include a base 201 and a cover 202. The base 201 and the cover 202 cooperate to form a receiving cavity, in which the contact system 100 can be disposed. In this way, the base 201 and the cover 202 can protect the contact system 100. Figure 1 and Figure 2 As shown. Part of the handle 203 is located in the receiving cavity, and another part can extend out of the receiving cavity to receive user operation.

[0114] It should be noted that the elastic element 70 can be a tension spring, a regular spring, or a structure made of other elastic materials, etc. This application does not specifically limit the type of elastic element 70.

[0115] It should also be noted that, in order to facilitate the setting of the elastic element 70 and make the force exerted by the elastic element 70 on the contact support 40 more balanced, thereby reducing the risk of the contact support 40 deviating, one end of the elastic element 70 sleeved on the mounting shaft 60 can be located in the middle of the mounting shaft 60.

[0116] At this time, the torsion spring 50 can be an integral double torsion spring, including a first pin 51, a first spring coil 52, a second pin 53, a second spring coil 54, and a third pin 55 connected in sequence, such as... Figure 10 and Figure 11 As shown. There is a gap between the first spring coil 52 and the second spring coil 54, and the elastic element 70 can pass through the gap between the first spring coil 52 and the second spring coil 54 onto the mounting shaft 60. The first pin 51 and the third pin 55 are located on the same side and can serve as one torsion arm of the torsion spring 50, while the second pin 53 is located on the other side and can serve as the other torsion arm of the torsion spring 50.

[0117] This configuration facilitates the provision of installation space 24 for the elastic element 70, improves the force balance between the moving contact bracket 20 and the contact support 40, and the integrated double torsion spring requires less space, making it particularly suitable for assembly in small spaces.

[0118] The first pin 51 can be bent toward the second pin 53, and the second pin 53 can be bent toward the first pin 51. In this way, when installing the torsion spring 50, force can be applied through the bent portions of the first pin 51 and the second pin 53, so that the operator can perform the assembly.

[0119] There may be a machining notch between the first pin 51 and the second pin 53, so that during the process of machining the integral double torsion spring, the tool can be inserted to cut off the machined torsion spring 50 and the tail material, saving the tedious process of secondary clamping.

[0120] Of course, besides the aforementioned torsion spring 50 being an integral double torsion spring, it can also be installed using two single torsion springs to support the contact bracket 20 and the contact support 40. In this case, the two single torsion springs can be located on the side closer to the first mounting plate 42 and the side closer to the second mounting plate 43, respectively, and the elastic element 70, sleeved on one end of the mounting shaft 60, can be located between the two single torsion springs. This application does not specifically limit the specific type and arrangement of the torsion spring 50.

[0121] In summary, in this embodiment, the moving contact 10 is rotatably mounted on the contact support 20. Thus, the moving contact 10 can rotate along the first rotation direction A according to its cooperation with the first stationary contact 101 and the second stationary contact 102, allowing the first moving contact 11 to contact the first stationary contact 101 and the second moving contact 12 to contact the second stationary contact 102, thereby achieving the connection of the contact assembly. The arrangement of the moving contact 10 and the contact support 20 in this application improves the consistency of the moving contact 10's contact with the first stationary contact 101 and the second stationary contact 102, reducing the possibility that the first moving contact 11 contacts the first stationary contact 101 while the second moving contact 12 cannot contact the second stationary contact 102, or that the second moving contact 12 contacts the second stationary contact 102 while the first moving contact 11 cannot contact the first stationary contact 101.

[0122] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A contact system having intersecting first and second directions, characterized in that, The contact system includes: A first stationary contact and a second stationary contact are spaced apart along the first direction; The moving contact has a first moving contact and a second moving contact, wherein the first moving contact is used to cooperate with the first stationary contact, and the second moving contact is used to cooperate with the second stationary contact; A contact support is provided, wherein the moving contact is mounted on the contact support and can rotate relative to the contact support in a first rotation direction. The contact support is used to drive the moving contact to rotate in a second rotation direction so that the moving contact moves closer to or further away from the first stationary contact. When only one of the first stationary contact and the second stationary contact is engaged with the moving contact, the moving contact can rotate relative to the contact support so that the other of the first stationary contact and the second stationary contact is engaged with the moving contact; Wherein, the axis of the first rotation direction is collinear with the second direction, and the axis of the second rotation direction is collinear with the first direction.

2. The contact system according to claim 1, characterized in that, The moving contact includes a first side plate, a second side plate, and a connecting plate. The first side plate and the second side plate are connected to the connecting plate at intervals. The first moving contact is disposed on the first side plate, and the second moving contact is disposed on the second side plate. The contact system further includes a rotating shaft extending along the second direction, a first mounting hole is provided on the connecting plate, a second mounting hole is provided on the contact bracket, and the rotating shaft passes through the first mounting hole and the second mounting hole.

3. The contact system according to claim 2, characterized in that, The second mounting hole is a stepped hole, which includes a through hole and a countersunk hole that are interconnected. A positioning boss is provided in the middle of the rotating shaft. The positioning boss is arranged around the second direction. In the second direction, a first limiting platform and a second limiting platform are respectively connected to both ends of the rotating shaft. The positioning boss is embedded in the countersunk hole, the portion of the rotating shaft located on the side away from the contact bracket passes through the first mounting hole, the first limiting platform abuts against the moving contact, the portion of the rotating shaft located on the side away from the moving contact passes through the through hole, and the second limiting platform abuts against the contact bracket.

4. The contact system according to claim 3, characterized in that, In the second direction, guide ramps are provided on both sides of the positioning boss.

5. The contact system according to claim 3, characterized in that, Both the first limiting platform and the second limiting platform are formed by riveting the rotating shaft.

6. The contact system according to claim 2, characterized in that, The contact bracket is connected to a limiting boss on the side facing the moving contact. After the moving contact rotates at a preset angle relative to the contact bracket, the first side plate or the second side plate can abut against the limiting boss.

7. The contact system according to any one of claims 1-6, characterized in that, The contact system also includes a contact support, the side of the contact bracket away from the moving contact has an installation space, the side of the contact support facing the moving contact is embedded in the installation space and connected to the contact bracket; The contact support is used to drive the contact bracket to rotate in the second rotation direction.

8. The contact system according to claim 7, characterized in that, The contact support includes a mounting part, a first mounting plate and a second mounting plate. The first mounting plate and the second mounting plate are connected at intervals to the side of the mounting part facing the moving contact. The first mounting plate and the second mounting plate are embedded in the mounting space. A stop platform is provided on the first mounting plate and / or the second mounting plate. The contact system further includes a torsion spring and a mounting shaft extending along the first direction. The mounting shaft passes through the first mounting plate, the second mounting plate, and the contact bracket. The torsion spring is sleeved on the mounting shaft. One torsion arm of the torsion spring abuts against the mounting portion, and the other torsion arm of the torsion spring abuts against the contact bracket, so that the contact bracket abuts against the stop platform.

9. The contact system according to claim 8, characterized in that, The contact system also includes an elastic element, one end of which is sleeved on the mounting shaft, and the other end of which is used to mount on the base; When the contact support rotates relative to the base in the second rotation direction to make the moving contact engage with the first stationary contact and the second stationary contact, the mounting shaft stretches the elastic element.

10. A circuit breaker, characterized in that, The circuit breaker includes the contact system according to any one of claims 1-9.

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