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

Abstract

The invention discloses a contact assembly, 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 moving contact groups, arc contact structures and a static contact group which can be electrically connected with the moving contact groups, at least one moving contact group and at least one static contact group are in clamping type connection, and at least one arc contact structure is in clapping type connection. The contact assembly provided by the design can combine the advantages of high breaking capacity of a clapping type contact and high short endurance capacity of a clamping type contact, and meanwhile, the contact assembly is prevented from being burnt and damaged by an electric arc, so that the opening and closing process of the contact assembly is more reliable and safer.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a contact assembly, 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 contacts of automatic transfer switches are usually set to be snap-on contacts or clamp-on contacts, which cannot take into account the respective advantages of snap-on contacts and clamp-on contacts; 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 contacts, resulting in a weak arc extinguishing ability of the automatic transfer switch.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0005] The purpose of the present application is to provide a contact assembly that has a strong arc extinguishing capability and can retain the breaking capability of a snap-type contact and the short-term withstand capability of a clamping contact, so as to solve the problem that the existing contact assembly cannot take into account the advantages of both the clamping contact and the snap-type contact and has a weak arc extinguishing capability.

[0006] To solve the above technical problems, this application provides the following solutions:

[0007] According to one aspect of an embodiment of the present application, a contact assembly is provided, including a moving contact group, an arc contact structure and a stationary contact group electrically connectable to the moving contact group, wherein at least one group of the moving contact group and the stationary contact group are clamp-connected, and at least one group of the arc contact structure is a snap-on connection.

[0008] Optionally, the moving contact group and the stationary contact group include at least one first active contact and at least one first main stationary contact, the arc contact structure includes at least one first arc moving contact and at least one first arc stationary contact, and the combination of the main contact structure and the arc contact structure includes at least one of the following:

[0009] At least one first arc moving contact is movably connected to at least one first active contact, and at least one first arc static contact is movably connected to at least one first main static contact;

[0010] At least one first arc moving contact is movably connected to at least one first active contact, and at least one first arc static contact is fixedly connected to at least one first main static contact;

[0011] At least one first arc moving contact is fixedly connected to at least one first active contact, and at least one first arc static contact is movably connected to at least one first main static contact.

[0012] Optionally, when at least one first arc moving contact is movably connected to at least one first active contact, there is at least one degree of freedom between the first arc moving contact and the first active contact;

[0013] When at least one first arcing stationary contact is movably connected to at least one first main stationary contact, at least one degree of freedom exists between the first arcing stationary contact and the first main stationary contact.

[0014] Optionally, when the contact assembly is electrically connected, the contact state includes at least one of the following:

[0015] The state of the snap-on connection is that when the moving contact group and the stationary contact group move and contact, they are in a state of positive snap-on electrical connection;

[0016] The state of the clamping connection is that when the moving contact group and the stationary contact group move and contact, they are in a state of side clamping electrical connection.

[0017] Optionally, the combination of the first active contact and the first main static contact includes at least one of the following:

[0018] The first active contact includes at least one pair of relatively disposed moving contact pieces, the first main stationary contact includes at least one stationary contact piece, and the at least one pair of relatively disposed moving contact pieces is electrically connected to the at least one stationary contact piece in a clamping manner;

[0019] The first active contact includes at least one moving contact piece, and the first main static contact includes at least one pair of oppositely arranged static contact pieces, and at least one pair of oppositely arranged static contact pieces is electrically connected to at least one moving contact piece in a clamping manner.

[0020] Optionally, the first arc moving contact is always electrically connected to the first active contact; the first arc static contact is always electrically connected to the first main static contact.

[0021] Optionally, when the contact assembly is opened, the first active contact is first separated from the first main static contact and moves a preset distance, and then the first arc moving contact is separated from the first arc static contact.

[0022] Optionally, at least part of the moving contact group, the stationary contact group and the arcing contact structure is made of at least one of the following materials:

[0023] Copper, silver, tungsten, molybdenum, gold, platinum, palladium, chromium, cadmium, copper-silver, copper-tungsten, silver-tungsten, silver-molybdenum, silver-palladium, silver-platinum, silver-cadmium, copper-graphite, silver-graphite, silver-cadmium oxide, silver-tungsten-graphite and other binary / ternary materials, pure copper, silver-tungsten alloy, copper-tungsten alloy, iron-based materials, at least one of the above materials;

[0024] The moving contact group and the stationary contact group are made of a first material, and the arc contact structure is made of a second material, which is more resistant to ablation than the first material.

[0025] Another aspect of the embodiments of the present application provides a pole unit, comprising the above-mentioned contact assembly.

[0026] 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.

[0027] 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.

[0028] On the other hand, an embodiment of the present application provides a power distribution equipment, 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 assembly to realize the closing and opening functions of the low-voltage switch and / or the transfer switch.

[0029] The beneficial effects of the embodiments of the present application include at least one of the following: the contact assembly provided by the embodiments of the present application includes a moving contact group, an arc contact structure, and a static contact group electrically connectable to the moving contact group; including at least one group of moving contact groups and static contact groups connected by clamping, and at least one group of arc contact structures connected by snapping. The moving contact group and the static contact group are electrically connected by clamping, and the arc contact structure is electrically connected by snapping. With such an arrangement, good arc extinguishing capability is achieved while achieving good electrical connection. The contact assembly provided by the above design can combine the advantages of the strong breaking capability of the snapping contact and the strong short-circuit resistance of the clamping contact, while reducing the degree of damage to the contact assembly by arc burning, making the opening and closing process of the contact assembly more reliable and safe.

[0030] 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.

[0031] The low-voltage switch provided in the embodiment of the present application, including the above-mentioned pole unit and operating mechanism, can combine the advantages of strong breaking capacity of snap-type contacts and strong short-circuit 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 supply.

[0032] 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 is applied to the power distribution equipment. The power distribution equipment can be used for whole-house intelligence, applied to smart homes and the Internet of Things industry, to achieve whole-house intelligent management. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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.

[0034] Figure 1 One of the structural schematic diagrams of the low-voltage switch provided in the embodiment of the present application;

[0035] Figure 2 The second structural diagram of the low-voltage switch provided in the embodiment of the present application;

[0036] Figure 3 One of the structural schematic diagrams of the contact assembly provided in the embodiment of the present application;

[0037] Figure 4 The second structural schematic diagram of the contact assembly provided in the embodiment of the present application;

[0038] Figure 5 The third structural diagram of the contact assembly provided in the embodiment of the present application;

[0039] Figure 6 One of the structural schematic diagrams of the stationary contact plate of the contact assembly provided in the embodiment of the present application;

[0040] Figure 7 A second structural schematic diagram of a stationary contact plate of a contact assembly provided in an embodiment of the present application;

[0041] Figure 8 A schematic structural diagram of a moving contact group of a contact assembly provided in an embodiment of the present application;

[0042] Fig. 9 A fourth structural diagram of a contact assembly provided in an embodiment of the present application;

[0043] Fig.10 This is an enlarged view of the detail at point B.

[0044] Icons: 100 - contact assembly; 1101 - main contact plate; 111 - first active contact; 112 - first main static contact; 120 - arc contact structure; 1201 - arc-striking contact plate; 1202 - first protrusion; 121 - first arc moving contact; 122 - first arc static contact; 130 - contact support; 140 - static contact plate; 141 - second protrusion; 1401 - first static contact plate; 1402 - second static contact plate; 200 - low-voltage switch; 210 - arc-extinguishing assembly; 220 - load end; 230 - magnetic conductive block. DETAILED DESCRIPTION

[0045] 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, rather than all 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.

[0046] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0047] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0048] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0050] In some realities, the contacts of automatic transfer switches are usually set to be snap-on contacts or clamp-on contacts, which cannot take into account the respective advantages of snap-on contacts and clamp-on contacts; 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 part of the contacts, resulting in a weak arc extinguishing ability of the automatic transfer switch.

[0051] 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.

[0052] 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.

[0053] 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 group of clamp-connected moving contact groups, an arc contact structure 120 and a stationary contact group electrically connectable to the moving contact group.

[0054] Optionally, the present application provides a contact assembly 100, comprising at least one group of moving contact groups, a static contact group and at least one group of arc contact structures 120. The moving contact group and the static contact group comprise at least one first active contact 111 and at least one first main static contact 112, and the first active contact 111 and the first main static contact 112 are connected by clamping;

[0055] The arc contact structure 120 includes at least one first arc moving contact 121 and at least one first arc stationary contact 122 . The first arc moving contact 121 and the first arc stationary contact 122 are connected by snapping together.

[0056] The contact assembly 100 provided by the above design can combine the advantages of strong breaking capacity of the snap-on contact and strong short-circuit resistance of the clamping contact, and at the same time, the arc contact structure 120 snaps to start the arc to reduce the degree of damage to the contact assembly 100 caused by the arc burning, so as to make the opening and closing process of the contact assembly 100 more reliable and safe.

[0057] like Figure 3 As shown, in one embodiment of the present application, a contact assembly 100 is provided. The contact assembly 100 includes a moving contact group, a stationary contact group and a group of arc contact structures 120. The moving contact group and the stationary contact group include a contact support 130, and the contact support 130 can rotate in a clockwise direction or a counterclockwise direction;

[0058] Two oppositely arranged main contact plates 1101 are fixedly connected to the contact support 130, and a first active contact 111 is arranged on the plate surface of the main contact plate 1101. When the contact support 130 rotates, it can drive the main contact plate 1101 to rotate, so that the first active contact 111 changes its position to close or open the circuit with the first main static contact 112.

[0059] The static contact group further includes a static contact plate 140, which is fixedly arranged relative to the contact support 130, and a first main static contact 112 which can be clamped and connected with the first active contact 111 is arranged on the plate surface of the static contact plate 140;

[0060] The arc contact structure 120 includes two oppositely arranged arc-striking contact plates 1201 rotatably connected to the contact support 130. The arc-striking contact plates 1201 are stacked with the main contact plate 1101, and a torsion spring or a compression spring is arranged between the two plates so that the arc-striking contact plates 1201 can move horizontally or rotate relative to the main contact plate 1101; a first arc moving contact 121 is arranged on the side edge of the arc-striking contact plate 1201. When the contact support 130 rotates, it can drive the arc-striking contact plate 1201 to rotate, so that the first arc moving contact 121 changes its position to close or open the circuit with the first arc static contact 122.

[0061] The arc contact structure 120 further includes a first arc static contact 122 which is also disposed on the static contact plate 140 . The arc static contact is disposed on a side edge of the static contact plate 140 close to the first arc moving contact 121 .

[0062] When the contact assembly 100 is closed, the contact support 130 rotates in the counterclockwise direction or the clockwise direction, which can drive the main contact plate 1101 and the arc-striking contact plate 1201 to rotate together. Since the first arc moving contact 121 on the arc-striking contact plate 1201 is set at the edge, it can first be snapped and connected with the first arc static contact 122 on the static contact plate 140, and no longer continue to rotate with the contact support 130; the contact support 130 drives the main contact plate 1101 to continue to rotate in the direction of movement until the first active contact 111 on the plate surface of the main contact plate 1101 clamps the first main static contact 112 on the static contact plate 140, so as to realize the closing of the contact assembly 100.

[0063] When the contact assembly 100 is opened, the contact support 130 rotates in the counterclockwise direction or the clockwise direction, and can drive the main contact plate 1101 to rotate so that the first active contact 111 is separated from the first main static contact 112 on the static contact plate 140. At this time, the first arc moving contact 121 on the arc striking contact plate 1201 still maintains the snap connection with the first arc static contact 122 on the static contact plate 140. The contact support 130 continues to drive the main contact plate 1101 to move for a certain displacement until the main contact plate 1101 overlaps with the arc striking contact plate 1201 again. At this time, the torsion spring or the compression spring is reset, and the arc striking contact plate 1201 rotates with the contact support 130 to separate the first arc moving contact 121 from the first arc static contact 122, so as to realize the opening of the contact assembly 100.

[0064] In a preferred embodiment of the present application, Fig. 9 and Fig.10 As shown, a first protrusion 1202 can also be provided on the side of the arc-striking touch plate 1201 close to the stationary contact plate 140, and the first protrusion 1202 can be set as an arc-shaped structure; correspondingly, a second protrusion 141 is provided on the side of the stationary contact plate 140 close to the arc-striking touch plate 1201, and the second protrusion 141 can be set as an arc-shaped structure to adapt to the first protrusion 1202.

[0065] When the contact support 130 rotates in the counterclockwise direction or the clockwise direction, it can drive the main contact plate 1101 and the arc-striking contact plate 1201 to rotate together. Since the first arc moving contact 121 on the arc-striking contact plate 1201 is arranged at the edge, it can first be connected with the first arc static contact 122 on the static contact plate 140, and no longer follow the contact support 130 to continue to rotate. At this time, the first protrusion 1202 fits with the second protrusion 141, and the edges of the two arc-shaped structures are tangent; the contact support 130 drives the main contact plate 1101 to continue to rotate in the direction of movement until the first active contact 111 on the plate surface of the main contact plate 1101 clamps the first main static contact 112 on the static contact plate 140. In this process, the first protrusion 1202 of the arc contact plate rotates along the second protrusion 141 to separate the first arc moving contact 121 from the first arc static contact 122;

[0066] When the contact support 130 rotates counterclockwise or clockwise to drive the main contact plate 1101 to rotate so that the first active contact 111 is separated from the first main static contact 112 located on the static contact plate 140, during this process, the first protrusion 1202 of the arc contact plate rotates along the second protrusion 141 to make the first arc moving contact 121 and the first arc static contact 122 snap together and connect again. The contact support 130 continues to drive the main contact plate 1101 to move a certain displacement until the main contact plate 1101 overlaps with the arc striking contact plate 1201 again, at which time the torsion spring or compression spring is reset, and the arc striking contact plate 1201 rotates with the contact support 130 to separate the first arc moving contact 121 from the first arc static contact 122, so as to realize the opening of the contact assembly 100.

[0067] like Figure 4 and Figure 5 As shown, in another embodiment of the present application, a contact assembly 100 is provided. The contact assembly 100 includes a moving contact group, a stationary contact group and an arc contact structure 120 .

[0068] The stationary contact group includes a contact support 130, which can rotate in a clockwise direction or a counterclockwise direction; the contact support 130 is connected to two stacked arc-striking contact plates 1201, and the first active contact 111 is arranged on the plate surfaces of the two arc-striking contact plates 1201 arranged opposite to each other;

[0069] The stationary contact group further includes a stationary contact plate 140, which is composed of a first stationary contact plate 1401 fixedly arranged relative to the contact support 130 and a second stationary contact plate 1402 rotatably connected to the first stationary contact plate 1401. Figure 6 As shown, the second static contact plate 1402 includes two, and the two second static contact plates 1402 are respectively arranged at opposite ends of the second static contact plate 1402, and the second static contact plate 1402 is arranged higher than the first static contact plate 1401; the first static contact plate 1401 corresponds to the position of the first active contact 111, and the first main static contact 112 is provided on the plate surface of the first static contact plate 1401, so that the first active contact 111 can be clamped and connected with the first main static contact 112.

[0070] The arc contact structure 120 includes a first arc moving contact 121 located at the ends of two arc striking contact plates 1201 , and also includes a first arc stationary contact 122 located at the end of a second stationary contact plate 1402 .

[0071] When the contact assembly 100 is closed, the contact support 130 rotates in the counterclockwise direction or the clockwise direction, which can drive the two arc-striking contact plates 1201 and the first active contact 111 located on the plate surface of the two arc-striking contact plates 1201 to rotate together. Since the second static contact plate 1402 is higher than the first static contact plate 1401, the first arc moving contact 121 is first connected with the first arc static contact 122, and the arc-striking contact plate 1201 continues to rotate along the movement direction with the contact support 130 to press the second static contact plate 1402 downward until the first active contact 111 located between the two arc-striking contact plates 1201 is clamped and connected with the first main static contact 112 on the first static contact plate 1401, so as to realize the closing of the contact assembly 100.

[0072] When the contact assembly 100 is opened, the contact support 130 rotates in the counterclockwise direction or the clockwise direction to drive the arc-striking contact plate 1201 to leave the static contact plate 140. At this time, the second static contact plate 1402 follows the movement of the arc-striking contact plate 1201 and is lifted up. Since the second static contact plate 1402 is higher than the first static contact plate 1401, after the first active contact 111 is separated from the first main static contact 112, the second static contact plate 1402 continues to be lifted up, and the first arc moving contact 121 is separated from the second arc static contact to realize the opening of the contact assembly 100.

[0073] It should be noted that the second static contact plate 1402 may also be provided with only one, such as Figure 7 The stationary contact group comprises a first stationary contact plate 1401 fixedly arranged relative to the contact support 130 113 and a second stationary contact plate 1402 rotatably connected to the first stationary contact plate 1401 . Each of the first static contact plate 1401 and the second static contact plate 1402 is provided with one, and the second static contact plate 1402 is arranged above the first static contact plate 1401 so that the second static contact plate 1402 is arranged higher than the first static contact plate 1401, and an elastic element is passed through the end of the second static contact plate 1402; the first static contact plate 1401 corresponds to the position of the first active contact 111, and a first main static contact 112 is provided on the plate surface of the first static contact plate 1401, so that the first active contact 111 can be clamped and connected with the first main static contact 112, and a first arc static contact 122 is provided on the plate surface of the second static contact plate 1402, so that the first arc moving contact 121 can be snap-connected with the first arc static contact 122.

[0074] Correspondingly, the first active contact 111 and the first arc moving contact 121 of the moving contact group are both arranged on the same main contact plate 1101. Figure 8As shown, the moving contact group includes a contact support 130, and the contact support 130 can rotate in a clockwise direction or a counterclockwise direction; a main contact plate 1101 is fixedly connected to the contact support 130, and a first arc moving contact 121 is protruding from the end of the main contact plate 1101 away from the contact support 130, and a first active contact 111 is also arranged below the first arc moving contact 121 of the main contact plate 1101.

[0075] When the contact assembly 100 is closed, the contact support 130 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 121 located on the surface of the main contact plate 1101 to rotate together. Since the second static contact plate 1402 is higher than the first static contact plate 1401, the first arc moving contact 121 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 130 to press the second static contact plate 1402 downward until the first active contact 111 is clamped and connected with the first main static contact 112 on the first static contact plate 1401, so as to realize the closing of the contact assembly 100.

[0076] When the contact assembly 100 is opened, the contact support 130 rotates in the counterclockwise direction or the clockwise direction to drive the main contact plate 1101 to leave the static contact plate 140. At this time, the second static contact plate 1402 follows the movement of the main contact plate 1101 and is lifted up. Since the second static contact plate 1402 is higher than the first static contact plate 1401, after the first active contact 111 is separated from the first main static contact 112, the second static contact plate 1402 continues to be lifted up, and the first arc moving contact 121 is separated from the first arc static contact 122 to realize the opening of the contact assembly 100.

[0077] The above-mentioned embodiment of the contact assembly 100 combines the advantages of the strong breaking capacity of the snap-type contact and the strong short-circuit resistance of the clamping contact, and can realize the process of first connecting and then separating the arc contact structure 120, thereby ensuring that the contact assembly 100 is not damaged by arc burning, making the opening and closing process of the contact assembly 100 more reliable and safe.

[0078] Optionally, when the contact assembly 100 is electrically connected, the contact state includes at least one of the following:

[0079] The state of the snap-on connection is that when the moving contact group and the stationary contact group move and contact, they are in a state of positive snap-on electrical connection;

[0080] The state of the clamping connection is that when the moving contact group and the stationary contact group move and contact, they are in a state of side clamping electrical connection.

[0081] Optionally, before the moving contact group and the stationary contact group move and contact, the first arc moving contact 121 and the first arc stationary contact 122 realize a surface-to-surface snapping electrical connection from the front side of the plate surface; after the moving contact group and the stationary contact group move and contact, the first active contact 111 and the first main stationary contact 112 realize a clamping electrical connection from the side of the plate surface.

[0082] Optionally, the combination of the moving contact group, the stationary contact group and the arcing contact structure 120 includes at least one of the following:

[0083] At least one first arc moving contact 121 is movably connected to at least one first active contact 111, and at least one first arc static contact 122 is movably connected to at least one first main static contact 112;

[0084] Optionally, in addition to the above-mentioned specific embodiments of the contact assembly 100, the moving contact group, the stationary contact group and the arc contact structure 120 can also be combined as follows: at least one first arc moving contact 121 is movably connected to at least one first active contact 111, so that the first arc moving contact 121 can rotate along with the rotation of the first active contact 111, and can also rotate relative to the first active contact 111; at least one arc stationary contact is movably connected to at least one first main stationary contact 112, so that the first arc moving contact 121 can rotate relative to the first active contact 111.

[0085] In a preferred embodiment of the present application, Figure 3 As shown, the first active contact 111 and the first arc moving contact 121 are respectively arranged on the two contact pieces, and the first active contact 111 and the first arc moving contact 121 are both arranged at the edges of the two contact pieces, and are both arranged on the side of the contact piece close to the first main static contact 112 and the first arc static contact 122; the two contact pieces are stacked and can move relative to and translate, so that the first active contact 111 can rotate or translate relative to the first arc moving contact 121; when the first active contact 111 moves toward the first main static contact 112, the first active contact 111 can move a displacement together with the first arc moving contact 121, and when the first arc moving contact 121 is snap-connected with the first arc static contact 122, the first active contact 111 can still move a displacement along this direction until it is clamped and connected with the first main static contact 112.

[0086] In a preferred embodiment of the present application, Figure 4As shown, the first main static contact 112 includes a contact piece arranged in the vertical direction, and one end of the first arc static contact 122 is rotatably connected with one end of the first main static contact 112 through a torsion spring, so that the first arc static contact 122 can rotate relative to the first main static contact 112. When the first arc moving contact 121 moves toward the first arc static contact 122, it can snap-connect with the first arc moving contact 121 and drive the first arc static contact 122 to rotate or translate relative to the first main static contact 112, so as to facilitate the clamping connection between the first active contact 111 and the first main static contact 112.

[0087] At least one first arc moving contact 121 is movably connected to at least one first active contact 111, and at least one first arc static contact 122 is fixedly connected to at least one first main static contact 112;

[0088] Optionally, in addition to the above combination, the moving contact group, the stationary contact group and the arc contact structure 120 can also be combined as follows: at least one first arc moving contact 121 is movably connected to at least one first active contact 111, so that the first arc moving contact 121 can rotate along with the rotation of the first active contact 111, and can also rotate relative to the first active contact 111, such as Figure 5 As shown; at least one first arc static contact 122 is fixedly connected to at least one main static contact as an integral structure. In a preferred embodiment of the present application, as Figure 5 As shown, the first main static contact 112 and the first active contact 111 are jointly arranged on a contact sheet, and the contact sheet is fixedly connected relative to the first active contact 111 and the first main static contact 112, so that the first active contact 111 and the first arc moving contact 121 can move a certain displacement respectively until they are clamped with the first main static contact 112 or clasped with the first arc static contact 122.

[0089] At least one first arcing moving contact 121 is fixedly connected to at least one first active contact 111 , and at least one first arcing stationary contact 122 is movably connected to at least one first main stationary contact 112 .

[0090] Optionally, in addition to the above combination, the moving contact group, the static contact group and the arc contact structure 120 can also be combined as follows: at least one first arc moving contact 121 can also be fixedly connected to at least one first active contact 111, and at least one first arc static contact 122 can be movably connected to at least one first main static contact 112. So that the first active contact 111 can drive the first arc moving contact 121 to move, so that the first arc moving contact 121 and the first arc static contact 122 are clasped together, and the first active contact 111 is clamped with the first main static contact 112.

[0091] In a possible implementation of the present application, when at least one first arcing stationary contact 122 is movably connected to at least one first main stationary contact 112 , at least one degree of freedom exists between the first arcing stationary contact 122 and the first main stationary contact 112 .

[0092] When at least one first arcing moving contact 121 is movably connected to at least one first active contact 111 , at least one degree of freedom exists between the first arcing moving contact 121 and the first active contact 111 .

[0093] Optionally, one end of the first arc static contact 122 is rotatably connected to one end of the first main static contact 112 through a torsion spring, so that the first arc static contact 122 can rotate relative to the first main static contact 112. When the first arc moving contact 121 moves toward the first arc static contact 122, it can snap-connect with the first arc moving contact 121 and drive the first arc static contact 122 to move vertically and / or horizontally and in translation relative to the first main static contact 112, and at this time, there is at least one degree of freedom between the first arc static contact 122 and the first main static contact 112.

[0094] One end of the first arc moving contact 121 is rotatably connected to one end of the first active contact 111 through a torsion spring, so that the first arc moving contact 121 can rotate relative to the first active contact 111. When the first arc moving contact 121 moves toward the first arc static contact 122, it can snap-connect with the first arc moving contact 121 and drive the first arc static contact 122 to move vertically and / or horizontally and parallelly relative to the first main static contact 112. At this time, there is at least one degree of freedom between the first arc moving contact 121 and the first active contact 111.

[0095] In one possible implementation of the present application, the combination of the first active contact 111 and the first main static contact 112 includes at least one of the following:

[0096] The first active contact 111 includes at least one pair of oppositely disposed moving contact pieces, and the first main static contact 112 includes at least one static contact piece, and the at least one pair of oppositely disposed moving contact pieces is electrically connected to the at least one static contact piece in a clamping manner;

[0097] Optionally, the first active contact 111 and the first main static contact 112 are connected by clamping, wherein the combination of the first active contact 111 and the first main static contact 112 is specifically as follows:

[0098] The first active contact 111 includes at least one pair of moving contact pieces arranged opposite to each other. Figure 1 and Figure 2As shown, in a preferred embodiment of the present application, a pair of moving contact pieces are included, and the moving contact pieces are relatively arranged on both sides of the contact support 130, and can rotate in a clockwise direction or counterclockwise direction following the contact support 130. The first main static contact 112 includes at least one static contact piece, and in a preferred embodiment of the present application, the static contact piece can be set to one, and the rotation of the contact support 130 can drive a pair of moving contact pieces to rotate and be clamped and connected with the static contact piece.

[0099] The first active contact 111 includes at least one moving contact piece, and the first main static contact 112 includes at least one pair of oppositely disposed static contact pieces, and the at least one pair of oppositely disposed static contact pieces is electrically connected to the at least one moving contact piece in a clamping manner.

[0100] Optionally, in addition to the above-mentioned combination, the first active contact 111 may also include at least one moving contact piece. In a preferred embodiment of the present application, the first active contact 111 may be set as a moving contact piece, which is fixedly connected to the contact support 130 and extends outward, and can rotate along the clockwise or counterclockwise direction with the contact support 130; the first main static contact 112 includes at least one pair of static contact pieces arranged opposite to each other. In a preferred embodiment of the present application, the first main static contact 112 may be set as a pair of static contact pieces arranged opposite to each other, and the static contact pieces may be arranged on the same side of the contact support 130 and arranged opposite to each other, such as Figure 1 and Figure 2 Of course, the stationary contact pieces can also be arranged on different sides of the contact support 130 and arranged opposite to each other, and the present application does not impose any restrictions on the specific arrangement positions. The rotation of the contact support 130 can drive a moving contact piece to rotate and be clamped and connected with the two stationary contact pieces respectively.

[0101] In one possible implementation mode of the present application, when the contact assembly 100 is opened, the first active contact 111 is first separated from the first main static contact 112 and moves a preset distance, and then the first arc moving contact 121 is separated from the first arc static contact 122 .

[0102] by Figure 3For example, when the contact assembly 100 is opened, the first active contact 111 first rotates counterclockwise to separate from the first main static contact 112, and at this time, the first arc moving contact 121 is still connected with the first arc static contact 122; when the first main static contact 112 rotates counterclockwise to a preset position, it drives the first arc moving contact 121 to separate from the first arc static contact 122, so that when opening, the first active contact 111 is first separated from the first main static contact 112, and then the first arc moving contact 121 is separated from the first arc static contact 122. Through such a setting, it can be ensured that the arc striking effect is good during the opening process, so that the main contact is not burned by the arc. Similarly, when the contact assembly 100 is closed, the first arc moving contact 121 is first connected with the first arc static contact 122, and then the first main static contact 112 is connected with the first active contact 111.

[0103] In a preferred embodiment of the present application, at least part of the moving contact group, the stationary contact group and the arcing contact structure 120 is made of at least one of the following materials:

[0104] Copper, silver, tungsten, molybdenum, gold, platinum, palladium, chromium, cadmium, copper-silver, copper-tungsten, silver-tungsten, silver-molybdenum, silver-palladium, silver-platinum, silver-cadmium, copper-graphite, silver-graphite, silver-cadmium oxide, silver-tungsten-graphite and other binary / ternary materials, pure copper, silver-tungsten alloy, copper-tungsten alloy, iron-based materials, at least one of the above materials;

[0105] The moving contact group and the stationary contact group are made of a first material, and the arc contact structure 120 is made of a second material, which is more resistant to ablation than the first material. The second material is preferably silver-tungsten alloy, copper-tungsten alloy, or iron-based material.

[0106] The arc contact structure 120 may be provided with a silver point, which is usually set to silver-tungsten alloy, but copper-tungsten alloy may also be used; of course, the moving contact group and the static contact group may 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 contact assembly 100 is further improved.

[0107] 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, the stationary contact group and the arc contact structure 120 to absorb the magnetic field when the moving contact group, the stationary contact group and / or the arc contact structure 120 are opened and / or closed, so as to prevent the main contact and / or the arc contact structure 120 from being disconnected due to excessive current when opening and / or closing when the current is too large, thereby improving the stability of the connection.

[0108] 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 100 to realize the closing and opening functions of the transfer switch.

[0109] Another aspect of the embodiment of the present application provides a low-voltage switch 200, which includes the above-mentioned pole unit and operating mechanism. Figure 1 and Figure 2 As shown, the low-voltage switch 200 includes a driving device, an operating mechanism and a contact assembly 100. The driving device drives the operating mechanism to drive the contact assembly 100 to realize the closing and opening functions of the low-voltage switch 200. It also includes an arc extinguishing assembly 210 arranged at the connection between the moving contact group, the static contact group and the arc contact structure 120. When the contact assembly 100 is opened or closed, the arc contact structure 120 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 also includes a load end 220, one side of which is electrically connected to the contact support 130 of the contact assembly 100 through a soft braided belt to achieve circuit conduction with the load.

[0110] 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.

[0111] The embodiment of the present application also provides a power distribution device, which is equipped with a low-voltage switch 200 and / or a transfer switch. The low-voltage switch 200 and / or the transfer switch include a driving device, an operating mechanism and a contact assembly 100. The driving device can drive the operating mechanism to drive the contact assembly 100 to realize the closing and opening functions of the low-voltage switch 200 and / or the transfer switch. The power distribution device 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 use 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 used in non-intelligent power distribution equipment in traditional industries.

[0112] The embodiment of the present application also provides a power distribution equipment, in which the aforementioned circuit breaker is applied to the power distribution equipment. The power distribution equipment can be used for whole-house intelligence, and can be applied to smart homes and the Internet of Things industry to realize whole-house intelligent management.

[0113] Optionally, the embodiments of the present application can be used for: fire-fighting electricity: fire control room, fire pumps, smoke exhaust facilities, fire elevators and their drainage pumps, fire emergency lighting, etc. at level one; corridor lighting, duty lighting, guard lighting, obstacle sign lights; rail transit; security system power supply; electronic information room power supply; passenger elevator power; sewage pump; variable frequency speed regulation constant pressure water supply and domestic pump (otherwise a secondary load); main offices, conference rooms, general duty room, archives room.

[0114] 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.

[0115] 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.

[0116] The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs.

[0117] The units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0118] 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.

[0119] 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.

[0120] 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 a moving contact group, an arc contact structure (120) and a stationary contact group electrically connected to the moving contact group, characterized in that: At least one group of moving contact groups and static contact groups are connected in a clamping manner, and at least one group of arc contact structures (120) is connected in a snap-fit ​​manner.

2. The contact assembly according to claim 1, characterized in that: The moving contact group and the stationary contact group include at least one first active contact (111) and at least one first main stationary contact (112); the arc contact structure (120) includes at least one first arc moving contact (121) and at least one first arc stationary contact (122); and the combination of the moving contact group, the stationary contact group and the arc contact structure (120) includes at least one of the following: The at least one first arc moving contact (121) is movably connected to the at least one first active contact (111), and the at least one first arc static contact (122) is movably connected to the at least one first main static contact (112); The at least one first arc moving contact (121) is movably connected to the at least one first active contact (111), and the at least one first arc static contact (122) is fixedly connected to the at least one first main static contact (112); The at least one first arc moving contact (121) is fixedly connected to the at least one first active contact (111), and the at least one first arc static contact (122) is movably connected to the at least one first main static contact (112).

3. The contact assembly according to claim 2, characterized in that: When the at least one first arc moving contact (121) is movably connected to the at least one first active contact (111), at least one degree of freedom exists between the first arc moving contact (121) and the first active contact (111); When the at least one first arcing stationary contact (122) is movably connected to the at least one first main stationary contact (112), at least one degree of freedom exists between the first arcing stationary contact (122) and the first main stationary contact (112).

4. The contact assembly according to any one of claims 1 to 3, characterized in that: When the contact assembly (100) is electrically connected, the contact state includes at least one of the following: The state of the snap-on connection is that the arc contact structure is in a state of positive snap-on electrical connection after moving into contact; The state of the clamping connection is that the moving contact group and the stationary contact group are in a side clamping electrical connection state after moving and contacting.

5. The contact assembly according to claim 2, characterized in that: The combination of the first active contact (111) and the first main static contact (112) comprises at least one of the following: The first active contact (111) comprises at least one pair of relatively arranged moving contact pieces, the first main stationary contact (112) comprises at least one stationary contact piece, and the at least one pair of relatively arranged moving contact pieces is electrically connected to the at least one stationary contact piece in a clamping manner; The first active contact (111) comprises at least one moving contact piece, and the first main static contact (112) comprises at least one pair of relatively arranged static contact pieces, wherein the at least one pair of relatively arranged static contact pieces is electrically connected to the at least one moving contact piece in a clamping manner.

6. The contact assembly according to claim 2, characterized in that: The first arc moving contact (121) always maintains an electrical connection with the first active contact (111); and the first arc static contact (122) always maintains an electrical connection with the first main static contact (112).

7. The contact assembly according to claim 2, characterized in that: When the contact assembly (100) is opened, the first active contact (111) is first separated from the first main static contact (112) and moves a preset distance, and then the first arc moving contact (121) is separated from the first arc static contact (122).

8. The contact assembly according to claim 1, characterized in that: The moving contact group and the stationary contact group are made of a first material, and the arc contact structure (120) is made of a second material, which is more resistant to ablation than the first material.

9. A pole unit, characterized in that: A contact assembly (100) comprising any one of claims 1 to 8.

10. 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 8, wherein the driving device drives the operating mechanism to drive the contact assembly to realize the closing and opening functions of the transfer switch.

11. A low voltage switch, characterized in that: The low-voltage switch (200) comprises a driving device, an operating mechanism and a contact assembly (100) according to any one of claims 1 to 8, wherein the driving device drives the operating mechanism to drive the contact assembly (100) to realize the closing and opening functions of the low-voltage switch (200).

12. A power distribution device, characterized in that: The power distribution equipment is equipped with a low-voltage switch (200) and / or a transfer switch, and the low-voltage switch and / or the transfer switch comprises a driving device, an operating mechanism and a contact assembly (100) as described in any one of claims 1 to 8, 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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