Contact structure, pole unit, change-over switch, low-voltage switch and power distribution equipment

Abstract

The invention provides a contact structure, a pole unit, a change-over switch, a low-voltage switch and power distribution equipment, and relates to the technical field of low-voltage electric appliances. The contact assembly provided by the invention comprises at least one static contact group and at least one moving contact group which is in contact with or separated from the static contact group, and the static contact group comprises at least one first main static contact which is in clamping connection with the moving contact group and at least one first arc static contact which is in clapping connection with the moving contact group. According to the contact assembly obtained by the design, the characteristic of strong breaking capacity of a clapping type contact is combined with the characteristic of strong short endurance capacity of a clamping type contact, so that the reliability of the contact assembly is improved; meanwhile, the arrangement of the arc striking contact can also play a good arc striking role, the degree of burning damage to the static contact caused by an electric arc in the opening and closing process of the static contact and the moving contact is reduced, and the safety of the contact assembly is improved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a contact structure, a pole unit, a transfer switch, a low-voltage switch and a power distribution device. Background Art

[0002] In the field of electrical technology, automatic transfer switches are used to provide uninterrupted power supply to loads and are able to switch between different power sources to ensure the continuity of power supply.

[0003] In the process of conceiving and realizing the present application, the inventors found that there are at least the following problems: in some realities, the static contact is usually only a snap-on contact or a clamp-on contact that is compatible with the moving contact, and it is impossible to take into account the respective advantages of the snap-on contact and the clamp-on contact; and because the arc root cannot be avoided from moving on the static contact before entering the arc extinguishing chamber during the opening process, the movement of the arc root on the static contact will burn a part of the arc starting angle of the contact, which is easy to cause ablation damage to the static contact. Summary of the invention

[0004] The purpose of the present application is to provide a contact assembly that is not easily burned by electric arcs and can retain the breaking capacity of snap-type contacts and the short-term withstand capacity of clamping contacts in response to the above-mentioned technical problems, so as to solve the problem that some actual moving contacts cannot have the advantages of both clamping contacts and snap-type contacts and are easily damaged by electric arcs.

[0005] To solve the above technical problems, the embodiments of the present application are implemented as follows:

[0006] According to one aspect of an embodiment of the present application, a contact assembly is provided, comprising at least one static contact group and at least one dynamic contact group in contact with or separated from the static contact group, wherein the static contact group comprises at least one first main static contact clamped to the dynamic contact group and at least one first arc static contact snapped to the dynamic contact group.

[0007] Optionally, a combination of the first main static contact and the first arcing static contact includes at least one of the following:

[0008] The at least one first arcing static contact is movably connected to the at least one first main static contact;

[0009] The at least one first arcing static contact is fixedly connected to the at least one first main static contact.

[0010] Optionally, when at least one first arcing stationary contact is movably connected to at least one first main stationary contact, there is at least one degree of freedom between the first arcing stationary contact and the first main stationary contact.

[0011] Optionally, the contact assembly includes a stationary contact plate, the first arc stationary contact is arranged on a side edge of the stationary contact plate close to the moving contact group, and the first main stationary contact is arranged on a side of the stationary contact plate close to the moving contact group.

[0012] Optionally, the contact assembly includes a first stationary contact plate and a second stationary contact plate rotatably arranged on opposite sides of the stationary contact plate, the first main stationary contact is arranged at the side edge of the first stationary contact plate close to the moving contact group, and the first arc stationary contact is arranged at one end of the second stationary contact plate close to the moving contact group.

[0013] Optionally, fixed shafts are sequentially passed through one end of the first stationary contact plate and the second stationary contact plate away from the moving contact group, and a first elastic element is arranged on the fixed shaft.

[0014] Optionally, the connection mode between the first main static contact and the first arc static contact includes at least one of the following:

[0015] The first main static contact is in elastic friction contact with the first arc static contact through the first elastic element, and is permanently electrically connected to the first arc static contact;

[0016] The first main static contact contacts the first arc static contact through a soft connection and is permanently electrically connected to the first arc static contact.

[0017] Optionally, the second stationary contact plate where the first arc stationary contact is located can rotate around a fixed axis relative to the first stationary contact plate.

[0018] Optionally, the first elastic element is arranged between a first static contact plate where the first main static contact is located and a second static contact plate where the first arcing static contact is located, so that the first arcing static contact maintains a force tendency of closing.

[0019] Optionally, the first main static contact has at least one pair of contact points that are clamped with the moving contact group; and the first arc static contact has at least one pair of electrical contact points that are snapped with the moving contact group.

[0020] Optionally, the snap-fit ​​electrical contact points use a second material, and the clamp-connected electrical contact points use a first material, and the second material is more resistant to burning than the first material.

[0021] Optionally, the moving contact group includes a first active contact capable of being electrically connected to a first main static contact of the static contact group in a clamping manner, and also includes a first arc moving contact capable of being electrically connected to a first arc moving contact of the static contact group in a snapping manner;

[0022] The first arc moving contact is arranged on at least two stacked main contact plates, one end of the main contact plate is fixedly connected to the contact support of the moving contact group, and the other end extends out of the contact support to be electrically connected to the stationary contact group;

[0023] The first active contact is arranged on one side of the two main contact plates which are arranged opposite to each other.

[0024] Optionally, the moving contact group further includes a contact support member and a second elastic element arranged inside the contact support member, and the main contact plate is stacked and arranged in a receiving cavity in the middle of the contact support member;

[0025] The second elastic elements are respectively arranged between the main contact plates and the contact support members so as to clamp the two main contact plates mutually.

[0026] Optionally, the first active contact includes a first clamping portion and a second clamping portion, and the first clamping portion and the second clamping portion are respectively arranged on one side of two main contact plates that are arranged opposite to each other, so as to be clamped and connected with the first stationary contact plate.

[0027] Optionally, the first stationary contact plate and the second stationary contact plate are stationary busbar plates.

[0028] Another aspect of the embodiments of the present application provides a pole unit, comprising the above-mentioned contact assembly.

[0029] In another aspect of an embodiment of the present application, a transfer switch is provided. The transfer switch includes a drive device, an operating mechanism and a contact assembly. The drive device drives the operating mechanism to drive the contact assembly to realize the closing and opening functions of the transfer switch.

[0030] In another aspect of an embodiment of the present application, a low-voltage switch is provided. The low-voltage switch includes a drive device, an operating mechanism and a contact assembly. The drive device drives the operating mechanism to drive the contact assembly to realize the closing and opening functions of the low-voltage switch.

[0031] On the other hand, an embodiment of the present application provides a power distribution device, which is equipped with a low-voltage switch and / or a transfer switch. The low-voltage switch and / or the transfer switch includes a drive device, an operating mechanism and a contact assembly. The drive device can drive the operating mechanism to drive the contact group to realize the closing and opening functions of the low-voltage switch and / or the transfer switch.

[0032] The beneficial effects of the embodiments of the present application include at least one of the following: the contact assembly provided by the present application, at least one static contact group and at least one moving contact group that contacts or separates from the static contact group, the static contact group includes at least one first main static contact that is clamped and connected to the moving contact group and at least one first arc static contact that is snapped and connected to the moving contact group. Through such a setting, the strong breaking capacity of the snapping contact is combined with the strong short-circuit resistance of the clamping contact; at the same time, the setting of the arc-striking contact can also play a good arc-striking role, reducing the degree of burning damage to the static contact caused by the arc during the opening and closing of the static contact and the moving contact, and improving the safety and reliability of the contact assembly.

[0033] The pole unit provided in the embodiment of the present application includes the above-mentioned contact assembly, which can combine the advantages of strong breaking capacity of the snap-type contacts and strong short-circuit withstand capacity of the clamping contacts, and has a good arc-striking effect, making the opening and closing process more reliable and safe.

[0034] The switching switch provided in the embodiment of the present application includes the above-mentioned contact assembly and operating mechanism, which can combine the advantages of strong breaking capacity of snap-type contacts and strong short-term withstand capacity of clamping contacts, and has a good arc-striking effect, which can ensure that the process is more reliable and safe when switching power.

[0035] The low-voltage switch provided in the embodiment of the present application includes the above-mentioned contact assembly and operating mechanism, which can combine the advantages of strong breaking capacity of snap-type contacts and strong short-term withstand capacity of clamping contacts, and has a good arc-striking effect, which can ensure that the process is more reliable and safe when switching power.

[0036] The power distribution equipment provided in the embodiment of the present application is equipped with the above-mentioned low-voltage switch. The above-mentioned low-voltage switch should be equipped with the power distribution equipment. The power distribution equipment can be used in the whole house intelligence and should be equipped in the smart home and Internet of Things industries to realize the whole house intelligent management. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic diagram of the structure of a low-voltage switch provided in an embodiment of the present application;

[0039] Figure 2 One of the structural schematic diagrams of the contact assembly provided in the embodiment of the present application;

[0040] Figure 3 One of the structural schematic diagrams of the stationary contact group provided in the embodiment of the present application;

[0041] Figure 4 One of the structural schematic diagrams of the moving contact group provided in the embodiment of the present application;

[0042] Figure 5 The second structural schematic diagram of the moving contact group provided in the embodiment of the present application;

[0043] Figure 6 The second structural schematic diagram of the contact assembly provided in the embodiment of the present application;

[0044] Figure 7The second structural diagram of the static contact group provided in the embodiment of the present application;

[0045] Figure 8 The third structural schematic diagram of the moving contact group provided in the embodiment of the present application.

[0046] Icons: 100 - contact assembly; 110 - moving contact group; 1101 - main contact plate; 111 - first active contact; 112 - first arc moving contact; 1111 - first clamping part; 1112 - second clamping part; 113 - contact support; 1131 - contact partition; 1132 - second elastic element; 120 - stationary contact group; 121 - first main stationary contact; 122 - first arc stationary contact; 123 - stationary contact plate; 1231 - first stationary contact plate; 1232 - second stationary contact plate; 1233 - first elastic element; 200 - low-voltage switch; 210 - arc extinguishing assembly; 220 - load end; 230 - magnetic conductive block. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] In the description of the present application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a signal connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0051] In some realities, the static contact is usually a snap-on contact or a clamping contact that is only compatible with the moving contact, and cannot take into account the respective advantages of the snap-on contact and the clamping contact; and because the arc root cannot be avoided from moving on the static contact before entering the arc extinguishing chamber during the opening process, the movement of the arc root on the static contact will burn a part of the arc striking angle of the contact, which is easy to cause ablation damage to the static contact.

[0052] Driven by intelligent and automated high-tech, the smart home industry has entered a period of rapid development. The smart home industry is facing new challenges and opportunities in the transformation of technology, market and industry.

[0053] According to the function, the smart home can be divided into eight modules: entertainment system, security system, control system, lighting system, kitchen and bathroom appliance system, network and communication system, health care system, and indoor environment system. The eight modules work together to realize the whole house intelligence.

[0054] In view of this, in order to solve the above problems, one aspect of an embodiment of the present application provides a contact assembly 100, including at least one static contact group 120 and at least one dynamic contact group 110 contacting or separating with the static contact group 120, wherein the static contact group 120 includes at least one first main static contact 121 clampingly connected to the dynamic contact group 110 and at least one first arc static contact 122 snap-connected to the dynamic contact group 110. Static contact group 120 static contact group 120 static contact group 120.

[0055] Optionally, the static contact group 120 of the static contact group 120 contact assembly 100 is provided with a first arc static contact 122 and a first main static contact 121. When the moving contact group 110 is in contact with or separated from the static contact group 120, the first arc moving contact 112 provided on the moving contact group 110 can be connected or disconnected with the first arc static contact 122, and the first active contact 111 provided on the moving contact group 110 can be connected or disconnected with the first main static contact 121. When the moving contact group 110 is in contact with the static contact group 120, the first arc moving contact 112 and the first arc static contact 122 are clasped and electrically connected; the first active contact 111 and the first main static contact 121 are clamped and electrically connected.

[0056] It should be noted that, in the embodiment of the present application, the static contact group 120 integrates the first arc static contact 122 and the first main static contact 121, and the first arc static contact 122 is used to snap-connect with the moving contact group 110, and the first main static contact 121 is used to clamp with the moving contact group 110; some actual static contact groups 120 usually set the first arc static contact 122 and the first main static contact 121 as snap-type contacts, and such a setting makes the short-term withstand capability of the static contact group 120 weak. However, the present application combines the strong breaking capability of the snap-type contact with the strong short-term withstand capability of the clamping contact, thereby improving the reliability of the static contact group 120.

[0057] The beneficial effects of the embodiments of the present application include: the contact assembly 100 provided by the present application, at least one group of static contact groups 120 and at least one group of moving contact groups 110 that are in contact with or separated from the static contact group 120, the static contact group 120 includes at least one first main static contact 121 that is clamped and connected to the moving contact group 110 and at least one first arc static contact 122 that is snapped and connected to the moving contact group 110. Through such a setting, the strong breaking ability of the snapping contact is integrated with the strong short-term resistance of the clamping contact; at the same time, the setting of the arc-starting contact can also play a good arc-starting role, preventing the arc from burning the static contact during the opening and closing process of the static contact and the moving contact, thereby improving the safety and reliability of the contact assembly 100.

[0058] In an achievable implementation manner of the present application, the combination of the first main static contact 121 and the first arcing static contact 122 includes at least one of the following:

[0059] The at least one first arcing static contact 122 is movably connected to the at least one first main static contact 121;

[0060] The at least one first arcing static contact 122 is fixedly connected to the at least one first main static contact 121 .

[0061] Optionally, the first arcing static contact 122 can be movably connected to the first main static contact 121 , or can be fixedly connected to the first main static contact 121 .

[0062] like Figure 2 As shown, in one embodiment of the present application, a contact assembly 100 is provided. The contact assembly 100 includes a set of moving contact groups 110. The moving contact group 110 includes a contact support member 113, and the contact support member 113 can rotate in a clockwise direction or a counterclockwise direction;

[0063] like Figure 2 , Figure 3 and Figure 4As shown, in one embodiment of the present application, a contact assembly 100 is provided. The contact assembly 100 includes a moving contact group 110, and the moving contact group 110 includes a first active contact 111 clamped with a stationary contact group 120 and a first arc moving contact 112 snapped with the stationary contact group 120.

[0064] The moving contact group 110 includes a contact support 113, which can rotate in a clockwise direction or a counterclockwise direction; two stacked main contact plates 1101 are fixedly connected to the contact support 113, and first active contacts 111 are fixedly arranged on the plate surfaces of the two main contact plates 1101 that are arranged opposite to each other;

[0065] The stationary contact group 120 includes a stationary contact plate 123, which is composed of a first stationary contact plate 1231 fixedly arranged relative to the contact support 113 and a second stationary contact plate 1232 rotatably connected to the first stationary contact plate 1231. Figure 3 As shown, the second static contact plate 1232 includes two, and the two second static contact plates 1232 are respectively arranged at the opposite ends of the second static contact plate 1232, and the second static contact plate 1232 is arranged higher than the first static contact plate 1231; the first static contact plate 1231 corresponds to the position of the first active contact 111, and the first main static contact 121 is provided on the plate surface of the first static contact plate 1231, so that the first active contact 111 can be clamped and connected with the first main static contact 121.

[0066] like Figure 4 As shown, the moving contact group 110 includes a first arc moving contact 112 located at the ends of the two main contact plates 1101 , and a first arc static contact 122 is provided at the end of the second static contact plate 1232 .

[0067] When the contact assembly 100 is closed, the contact support 113 rotates in the counterclockwise direction or the clockwise direction, which can drive the two main contact plates 1101 and the first active contact 111 located on the plate surface of the two main contact plates 1101 to rotate together. Since the second static contact plate 1232 is higher than the first static contact plate 1231, the first arc moving contact 112 is first connected with the first arc static contact 122, and the main contact plate 1101 continues to rotate along the movement direction following the contact support 113 to press the second static contact plate 1232 downward until the first active contact 111 located between the two main contact plates 1101 is clamped and connected with the first main static contact 121 on the first static contact plate 1231, so as to realize the closing of the contact assembly 100. Figure 4 As shown, the first active contact 111 is composed of a first clamping portion 1111 and a second clamping portion 1112 , and the first clamping portion 1111 and the second clamping portion 1112 are respectively arranged on one side of the two main contact plates 1101 that are arranged opposite to each other.

[0068] When the contact assembly 100 is opened, the contact support 113 rotates in the counterclockwise direction or the clockwise direction to drive the main contact plate 1101 to leave the static contact plate 123. At this time, the second static contact plate 1232 is lifted up following the movement of the main contact plate 1101. Since the second static contact plate 1232 is higher than the first static contact plate 1231, after the first active contact 111 is separated from the first main static contact 121, the second static contact plate 1232 continues to be lifted up, and the first arc moving contact 112 is separated from the first arc static contact 122 to realize the opening of the contact assembly 100.

[0069] In another achievable implementation of the present application, as Figure 6 As shown, the moving contact group 110 includes a contact support 113, and the contact support 113 can rotate in a clockwise direction or a counterclockwise direction; a main contact plate 1101 is fixedly connected to the contact support 113, and a first arc moving contact 112 is protruding from the end of the main contact plate 1101 away from the contact support 113, and a first active contact 111 is also arranged below the first arc moving contact 112 of the main contact plate 1101.

[0070] The stationary contact group 120 includes a stationary contact plate 123, which is composed of a first stationary contact plate 1231 fixedly arranged relative to the contact support 113 and a second stationary contact plate 1232 rotatably connected to the first stationary contact plate 1231. Figure 6 and Figure 7 As shown, the first static contact plate 1231 and the second static contact plate 1232 are each provided with one, the second static contact plate 1232 is arranged above the first static contact plate 1231, so that the second static contact plate 1232 is arranged higher than the first static contact plate 1231, and the end of the second static contact plate 1232 is penetrated by a first elastic element 1233; the first static contact plate 1231 corresponds to the position of the first active contact 111, and the first main static contact 121 is provided on the plate surface of the first static contact plate 1231, so that the first active contact 111 can be clamped and connected with the first main static contact 121.

[0071] like Figure 8 As shown, the moving contact group 110 includes a first arc moving contact 112 protruding from an end away from the contact support 113 , and a first active contact 111 is also provided below the first arc moving contact 112 on the main contact plate 1101 .

[0072] When the contact assembly 100 is closed, the contact support 113 rotates in the counterclockwise direction or the clockwise direction, which can drive the main contact plate 1101 and the first active contact 111 and the first arc moving contact 112 located on the surface of the main contact plate 1101 to rotate together. Since the second static contact plate 1232 is higher than the first static contact plate 1231, the first arc moving contact 112 is first connected with the first arc static contact 122, and the main contact plate 1101 continues to rotate along the movement direction following the contact support 113 to press the second static contact plate 1232 downward until the first active contact 111 located between the two main contact plates 1101 is clamped and connected with the first main static contact 121 on the first static contact plate 1231, so as to realize the closing of the contact assembly 100.

[0073] When the contact assembly 100 is opened, the contact support 113 rotates in the counterclockwise direction or the clockwise direction to drive the main contact plate 1101 to leave the static contact plate 123. At this time, the second static contact plate 1232 is lifted up following the movement of the main contact plate 1101. Since the second static contact plate 1232 is higher than the first static contact plate 1231, after the first active contact 111 is separated from the first main static contact 121, the second static contact plate 1232 continues to be lifted up, and the first arc moving contact 112 is separated from the first arc static contact 122 to realize the opening of the contact assembly 100.

[0074] The above-mentioned embodiments of the contact assembly 100 only differ in the specific number of the first main static contact 121, the first arc static contact 122, the first active contact 111 and the first arc moving contact 112. It should be noted that the present application does not impose any limitation on the specific number of the first main static contact 121, the first arc static contact 122, the first active contact 111 and the first arc moving contact 112. As long as the advantages of the strong breaking capacity of the snap-type contact and the strong short-circuit resistance of the clamping contact can be combined, and the process of first connecting and then separating the first arc moving contact 112 can be realized, it is ensured that the static contact group 120 is not damaged by arc burning, so that the opening and closing process of the contact assembly 100 is more reliable and safe.

[0075] Optionally, there is a certain distance between the first arc static contact 122 and the first arc moving contact 112 of the moving contact group 110, there is a certain distance between the first main static contact 121 and the first active contact 111 of the moving contact group 110, and the distance between the first arc static contact 122 and the first arc moving contact 112 is smaller than the distance between the first main static contact 121 and the first active contact 111. When the moving contact group 110 moves toward the static contact group 120, since the spacing between the first arc moving contact 112 and the first arc static contact 122 of the moving contact group 110 is smaller, the first arc moving contact 112 and the first arc static contact 122 are closer. When closing the circuit, the first arc moving contact 112 can first be connected with the first arc static contact 122; and the first active contact 111 needs to move a certain displacement to clamp with the first main static contact 121; when opening the circuit, the first active contact 111 is first separated from the first main static contact 121, and the first arc moving contact 112 is then separated from the first arc static contact 122. The characteristic of the first arc static contact 122 and the first arc moving contact 112 being in contact first and then separated is conducive to protecting the static contact group 120 from arcing and being burned by the arc.

[0076] In one achievable implementation of the present application, as Figure 3 As shown, the stationary contact group 120 includes a stationary contact plate 123 , a first arc stationary contact 122 is arranged on the side edge of the stationary contact plate 123 of the stationary contact group 120 close to the moving contact group 110 , and a first main stationary contact 121 is arranged on a side of the stationary contact plate 123 close to the moving contact group 110 .

[0077] Optionally, the operating end includes a static contact plate 123, the panel of the static contact plate 123 is parallel to the shell of the dual power automatic transfer switch; the first arc static contact 122 and the first main static contact 121 are both arranged on the static contact plate 123, wherein the first arc static contact 122 is arranged on the side edge of the static contact plate 123 close to the moving contact group 110, so as to be snap-connected with the first arc moving contact 112 of the moving contact group 110; the first main static contact 121 is arranged on the side of the plate surface of the static contact plate 123 close to the moving contact group 110, so as to be clamped and connected with the first active contact 111 of the moving contact group 110.

[0078] When the moving contact group 110 moves toward the stationary contact group 120, the first arc moving contact 112 of the moving contact group 110 can first be snapped and connected with the first arc stationary contact 122 on the side edge of the stationary contact plate 123; the first active contact 111 continues to move toward the direction of the stationary contact group 120 until it is clamped with the first main stationary contact 121 on the surface of the stationary contact plate 123.

[0079] This arrangement enables the first arc moving contact 112 to first snap and connect with the first arc static contact 122 to form one electrical connection, and then the first active contact 111 and the first main static contact 121 are clamped to form two electrical connections.

[0080] Optionally, there is at least one degree of freedom between the first arcing static contact 122 and the first main static contact 121 .

[0081] Optionally, in a connection mode, such as Figure 3 A fixed shaft is successively passed through the ends of the first stationary contact plate 1231 and the second stationary contact plate 1232 away from the moving contact group 110 100, and a first elastic element 1233 is arranged on the fixed shaft so that the second stationary contact plate 1232 where the first arc stationary contact 122 is located can rotate around the fixed shaft relative to the first stationary contact plate 1231; it should be noted that the arrangement method is at least one of the following: sleeve arrangement, installation, and compression spring.

[0082] The first main static contact 121 is in elastic friction contact with the first arc static contact 122 through the first elastic element 1233, and is permanently electrically connected to the first arc static contact 122; or, the first main static contact is in contact with the first arc static contact through a soft connection, and is permanently electrically connected to the first arc static contact, wherein the soft connection can be connected by a braided cable, a soft braided belt, etc. The first elastic element 1233 is arranged between the first static contact plate 1231 where the first main static contact 121 is located and the second static contact plate 1232 where the first arc static contact is located, so that the first arc static contact maintains a force tendency of closing.

[0083] When the moving contact group 110 moves toward the stationary contact group 120, it can snap-connect with the first arc stationary contact 122 and drive the second stationary contact plate 1232 to move vertically and / or horizontally and translationally relative to the first stationary contact plate 1231. At this time, there is at least one degree of freedom between the first arc stationary contact 122 and the first main stationary contact 121.

[0084] In a preferred embodiment of the present application, the operating end includes a first static contact plate 1231 and a second static contact plate 1232 rotatably arranged on opposite sides of the first static contact plate 1231, the first main static contact 121 is arranged on the side edge of the first static contact plate 1231 close to the moving contact group 110, and the first arc static contact 122 is arranged on one end of the second static contact plate 1232 close to the moving contact group 110. Fixed shafts are successively penetrated through the ends of the first static contact plate 1231 and the second static contact plate 1232 away from the moving contact group 110, and a torsion spring or a compression spring is arranged on the fixed shaft, wherein the arrangement method is at least one of the following: sleeve arrangement, installation, and compression spring. The first main static contact 121 is arranged on the side edge of the first static contact plate 1231 close to the moving contact group 110, and the first arc static contact 122 is arranged on one end of the second static contact plate 1232 close to the moving contact group 110. When the moving contact group 110 moves toward the stationary contact group 120, the first arc moving contact 112 of the moving contact group 110 can first be snapped and connected with the first arc stationary contact 122 located at the end of the second stationary contact plate 1232, and the rotatable second stationary contact plate 1232 is pressed down until the first active contact 111 is clamped with the first main stationary contact 121.

[0085] Through the above settings, the first arc static contact 122 and the first arc moving contact 112 can be first contacted and then separated through the structural setting of the static contact, so as to protect the static contact group 120 from arcing and not being burned by the arc, thereby improving the reliability of the static contact group 120.

[0086] In a preferred embodiment of the present application, the first main static contact 121 has at least one pair of contact points that are clamped with the moving contact group 110 ; the first arc static contact 122 has at least one pair of electrical contact points that are snapped with the moving contact group 110 .

[0087] Optionally, the electrical contact point of the first arc static contact 122 is provided with a silver point, which is usually provided with a silver-tungsten alloy, but a copper-tungsten alloy can also be used; of course, the electrical contact point of the first main static contact 121 can also be provided with a silver point to improve the connection and disconnection capabilities, and the present application does not impose any restrictions on this. By providing the silver point, the connection and disconnection capabilities can be improved, and the reliability of the static contact group 120 is further improved.

[0088] In a preferred embodiment of the present application, the snap-fit ​​electrical contact points use the second material, and the clamp-type electrical contact points use the first material, and the second material is more resistant to burning than the first material. The static contact plate 123. Among them, the second material is preferably silver-tungsten alloy, copper-tungsten alloy, and iron-based material, which is more resistant to burning, and can ensure that the static contact group 120 is not burned or damaged by the arc during the arcing process, thereby improving the reliability and stability of the static contact group 120.

[0089] In one possible implementation of the present application, the moving contact group 110 includes a first active contact 111 capable of being electrically connected to a first main static contact 121 of the static contact group 120 by clamping, and also includes a first arc moving contact 112 capable of being electrically connected to a first arc moving contact 112 of the static contact group 120 by snapping;

[0090] The first arc moving contact 112 is arranged on at least two stacked main contact plates 1101, one end of the main contact plate 1101 is fixedly connected to the contact support 113 of the moving contact group 110, and the other end extends out of the contact support 113 to be electrically connected to the stationary contact group 120;

[0091] The first active contact 111 is disposed on one side of the two main contact plates 1101 that are opposite to each other.

[0092] Optionally, the moving contact group 110 further includes a contact partition 1131 and a second elastic element 1132 disposed inside the contact support 113, the contact partition 1131 is a plate-shaped structure, and the main contact plate 1101 is attached to two opposite surfaces of the contact partition 1131;

[0093] The second elastic elements 1132 are respectively disposed between the main contact plate 1101 and the contact partition plate 1131 so as to clamp the main contact plate 1101 and the main contact plate 1131 to each other.

[0094] Alternatively, if Figure 4 As shown, the moving contact includes a contact support 113, and the contact support 113 extends outward with at least two adjacent and stacked main contact plates 1101, and the first arc moving contact 112 is arranged at the ends of the two arc-starting plates close to the stationary contact group 120 to be electrically connected to the stationary contact group 120;

[0095] The first active contact 111 is arranged on one side of the two main contact plates 1101 opposite to each other; the first active contact 111 includes a first clamping portion 1111 and a second clamping portion 1112, and the first clamping portion 1111 and the second clamping portion 1112 are respectively arranged on one side of the two main contact plates 1101 opposite to each other, so as to be clamped and connected with the first stationary contact plate 1231.

[0096] like Figure 5 As shown, a contact partition 1131 and a second elastic element 1132 are disposed inside the contact support 113. The contact partition 1131 is a plate-shaped structure, and the two main contact plates 1101 are respectively attached to the two opposite sides of the contact partition 1131;

[0097] The second elastic elements 1132 are respectively disposed between the main contact plate 1101 and the contact partition plate 1131 so as to clamp the main contact plate 1101 and the main contact plate 1131 to each other.

[0098] In another preferred embodiment of the present application, the first static contact plate 1231 and the second static contact plate 1232 are static busbar plates.

[0099] Optionally, the first static contact plate 1231 and the second static contact plate 1232 are static busbar plates. When the static busbar plates are static busbar plates and static busbar substrates are used, the silver point setting of the first main static contact 121 can be omitted, and high connection and disconnection capacity can also be achieved, while also reducing production costs.

[0100] On the other hand, an embodiment of the present application provides a pole unit, which includes the above-mentioned contact assembly 100, which can combine the advantages of the strong breaking capacity of the snap-on contact and the strong short-circuit resistance of the clamping contact, and has a good arc-striking effect, making the opening and closing process more reliable and safe; the pole unit can be provided with a magnetic block 230, and the magnetic block 230 is arranged on the movement trajectory of the moving contact group 110 to absorb the magnetic field when the moving contact group 110 and the stationary contact group 120 are opened and / or closed, so as to prevent the contact from being disconnected due to excessive current when the moving contact group 110 and the stationary contact group 120 are opened and / or closed when the current is too large, thereby improving the stability of the connection.

[0101] In another aspect of an embodiment of the present application, a transfer switch is provided. The transfer switch includes a drive device, an operating mechanism and a contact assembly 100. The drive device drives the operating mechanism to drive the contact assembly 110 100 to realize the closing and opening functions of the transfer switch.

[0102] Another aspect of the present application provides a low-voltage switch 200, which includes a drive device, an operating mechanism, and a contact assembly 100. The drive device drives the operating mechanism to drive the contact assembly 110 to realize the closing and opening functions of the low-voltage switch 200. Figure 1 As shown, the low-voltage switch 200 further includes an arc extinguishing assembly 210 disposed at the connection between the moving contact group 110 and the static contact group 120. When the moving contact group 110 is opened or closed, the first arc moving contact 112 and the first arc static contact 122 can lead the arc to the arc extinguishing chamber for arc extinguishing, thereby improving the safety of the low-voltage switch 200. The low-voltage switch 200 further includes a load terminal 220, one side of which is electrically connected to the contact support 113 of the moving contact group 110 through a soft braided belt to achieve circuit conduction with the load.

[0103] Through the setting of the operating mechanism and the pole unit, the connection, disconnection and switching of the power supply can be realized; at the same time, the low-voltage switch 200 can combine the advantages of strong breaking capacity of the snap-type contacts and strong short-term withstand capacity of the clamping contacts, and has a good arc-striking effect, which can ensure that the process of switching the power supply is more reliable and safe.

[0104] The embodiment of the present application also provides a power distribution equipment, which is equipped with a low-voltage switch 200 and / or a transfer switch. The low-voltage switch 200 and / or the transfer switch includes a drive device, an operating mechanism and a static contact group 120 pieces 100. The drive device can drive the operating mechanism to drive the static contact group 120 pieces 100 to realize the closing and opening functions of the low-voltage switch 200 and / or the transfer switch. The power distribution equipment can be equipped with at least one of the following: a distribution box, a cable, a distribution cabinet, a motor, a switch socket, a lamp, an air conditioner, an electric water heater, an electric meter, a camera, a telephone, a computer, etc. Such power distribution equipment can be equipped with the circuit breaker related structure of the present application to realize intelligent management, but it is not limited to the above intelligently managed power distribution equipment, and can also be equipped in the non-intelligent power distribution equipment of traditional industries.

[0105] The embodiment of the present application also provides a power distribution equipment, and the aforementioned circuit breaker should be equipped with the power distribution equipment. The power distribution equipment can be used in whole-house intelligence and should be equipped in smart home and Internet of Things industries to realize whole-house intelligent management.

[0106] It is understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of the present application. The technical solutions of the present application can also be applied to other scenarios. For example, it is known to those skilled in the art that with the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0107] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0108] The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs.

[0109] The units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0110] In the present application, the same or similar terminology concepts, technical solutions and / or application scenario descriptions are generally described in detail only the first time they appear. When they appear again later, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of the present application, for the same or similar terminology concepts, technical solutions and / or application scenario descriptions that are not described in detail later, reference can be made to the previous related detailed descriptions.

[0111] In the present application, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0112] The various technical features of the technical solution of the present application can be arbitrarily combined. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

Claims

1. A contact assembly, comprising at least one stationary contact group (120) and at least one moving contact group (110) contacting or separating from the stationary contact group (120), characterized in that: The stationary contact group (120) comprises at least one first main stationary contact (121) connected to the moving contact group (110) in a clamping manner and at least one first arc stationary contact (122) connected to the moving contact group (110) in a snapping manner.

2. The contact assembly according to claim 1, characterized in that: The combination of the first main static contact (121) and the first arc static contact (122) comprises at least one of the following: The at least one first arcing static contact (122) is movably connected to the at least one first main static contact (121); The at least one first arcing static contact (122) is fixedly connected to the at least one first main static contact (121).

3. The contact assembly according to claim 2, characterized in that: When the at least one first arcing stationary contact (122) is movably connected to the at least one first main stationary contact (121), at least one degree of freedom exists between the first arcing stationary contact (122) and the first main stationary contact (121).

4. The contact assembly according to claim 1, characterized in that: The contact assembly includes at least one of the following: The contact assembly (100) comprises a stationary contact plate (123), the first arc stationary contact (122) being arranged on a side edge of the stationary contact plate (123) close to the moving contact group (110), and the first main stationary contact (121) being arranged on a side of a plate surface of the stationary contact plate (123) close to the moving contact group (110); The contact assembly (100) comprises a first stationary contact plate (1231) and a second stationary contact plate (1232) rotatably arranged on opposite sides of the first stationary contact plate (1231); the first main stationary contact (121) is arranged on the side edge of the first stationary contact plate (1231) close to the moving contact group (110); and the first arc stationary contact (122) is arranged on one end of the second stationary contact plate (1232) close to the moving contact group (110).

5. The contact assembly according to claim 4, characterized in that: Fixed shafts are sequentially passed through the ends of the first stationary contact plate (1231) and the second stationary contact plate (1232) away from the moving contact group (110), and the fixed shafts are provided with a first elastic element (1233).

6. The contact assembly according to claim 5, characterized in that: The connection mode of the first main static contact (121) and the first arc static contact (122) includes at least one of the following: The first main static contact (121) is in elastic frictional contact with the first arcing static contact (122) through the first elastic element (1233), and is permanently electrically connected to the first arcing static contact (122); The first main static contact (121) contacts the first arcing static contact (122) via a soft connection, and is permanently electrically connected to the first arcing static contact (122).

7. The contact assembly according to claim 6, characterized in that: The second stationary contact plate (1232) on which the first arc stationary contact (122) is located is capable of rotating around the fixed axis relative to the first stationary contact plate (1231).

8. The contact assembly according to claim 6, characterized in that: The first elastic element (1233) is arranged between a first static contact plate (1231) where the first main static contact (121) is located and a second static contact plate (1232) where the first arc static contact (122) is located, so that the first arc static contact (122) maintains a force tendency of closing.

9. The contact assembly according to claim 1, characterized in that: The first main static contact (121) has at least one pair of contact points that are clamped and connected to the moving contact group (110); and the first arc static contact (122) has at least one pair of electrical contact points that are snapped and connected to the moving contact group (110).

10. The contact assembly according to claim 9, characterized in that: The electrical contact points of the snap-fit ​​connection of the stationary contact group (120) use the second material, and the electrical contact points of the clamping connection of the stationary contact group (120) use the first material, and the second material is more resistant to burning than the first material.

11. The contact assembly according to claim 1, characterized in that: The moving contact group (110) includes at least one of the following: The moving contact group (110) comprises a first active contact (111) capable of being electrically connected to a first main static contact (121) of the static contact group (120) by clamping, and also comprises a first arc moving contact (112) capable of being electrically connected to a first arc static contact (122) of the static contact group (120) by snapping, and / or the first arc moving contact (112) is arranged on at least two stacked main contact plates (1101), one end of the main contact plate (1101) is connected to a contact support (113) of the moving contact group (110), and the other end extends out of the contact support (113) to be electrically connected to the static contact group (120), and / or the first active contact (111) is arranged on one side of the two main contact plates (1101) that are arranged opposite to each other; The moving contact group (110) also includes a contact support (113) arranged inside the contact support (113), a contact partition (1131) and a second elastic element (1132); the main contact plate (1101) is respectively attached to two opposite sides of the contact partition (1131), and / or the second elastic element (1132) is arranged between the main contact plate (1101) and the contact support (113), so that the two main contact plates (1101) are clamped with each other.

12. The contact assembly according to claim 11, characterized in that The first active contact (111) comprises a first clamping portion (1111) and a second clamping portion (1112); the first clamping portion (1111) and the second clamping portion (1112) are respectively arranged on one side of the two main contact plates (1101) that are arranged opposite to each other.

13. A pole unit, characterized in that: A contact assembly (100) comprising any one of claims 1 to 12.

14. A transfer switch, characterized in that: The transfer switch comprises a driving device, an operating mechanism and a contact assembly (100) according to any one of claims 1 to 12, wherein the driving device drives the operating mechanism to drive the contact assembly to realize the closing and opening functions of the transfer switch.

15. A low voltage switch, characterized in that: The low-voltage switch comprises a driving device, an operating mechanism and a contact assembly (100) according to any one of claims 1 to 12, wherein the driving device drives the operating mechanism to drive the contact assembly to realize the closing and opening functions of the low-voltage switch.

16. A power distribution device, characterized in that: The power distribution equipment is equipped with a low-voltage switch and / or a transfer switch, and the low-voltage switch and / or the transfer switch includes a driving device, an operating mechanism and a contact assembly (100) as described in any one of claims 1 to 12, and the driving device can drive the operating mechanism to drive the contact assembly to realize the closing and opening functions of the low-voltage switch and / or the transfer switch.

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