CN220984365U - Automatic transfer switch electric appliance and contact system thereof - Google Patents

Abstract

The utility model relates to an automatic transfer switch electrical appliance and a contact system thereof, wherein the contact system comprises a shell, a first fixed contact, a second fixed contact and a moving contact module, the moving contact module comprises a rotary table component and two moving contact components, a mounting hole and two mounting grooves which are arranged on two sides of the mounting hole are arranged on the rotary table component, the rotary table component can rotate around the mounting hole, the groove wall of the corresponding mounting groove correspondingly pushes the corresponding moving contact to carry out contact and separation displacement with the corresponding fixed contact according to the rotating direction of the rotary table component, and a corresponding spring component provides contact pressure for the corresponding moving contact under the thrust of the groove wall of the corresponding mounting groove and is matched with the rotary table component to realize corresponding moving contact overrun. The contact system adopts a single-shaft transmission mode to realize switching of three states of common power supply switching-on, standby power supply switching-on and double-split switching-on, and can give enough contact pressure to a corresponding moving contact and set moving contact over-travel when switching-on.

Description

Automatic transfer switch electric appliance and contact system thereof

Technical Field

The utility model relates to the technical field of automatic transfer switching equipment, in particular to an automatic transfer switching equipment and a contact system thereof.

Background

The automatic transfer switching device is a common low-voltage electrical appliance, is commonly used for important power distribution occasions, is used for switching two paths of power supplies, and ensures that the power supply is rapidly switched to a standby power supply when the common power supply fails in the power supply process, so that the normal power supply of a load end is ensured.

The contact system is used as a key part for bearing the connection and disconnection of a power supply, and the reliability and the service life of the contact system have key influence on the whole automatic transfer switch electric appliance; when the switch is switched on and off with larger current, higher electric arc and energy are generated, and the electric arc and the energy are gathered between the moving contact and the fixed contact, so that the moving contact and the fixed contact of the switch electrical appliance are greatly damaged; in order to ensure the reliability of the switching device, the contact system must therefore require that an overrun and/or a reliable contact pressure be achieved.

However, at present, most contact systems of automatic transfer switch appliances use two rotating shafts to respectively drive a first moving contact to contact or disconnect from a first fixed contact, and a second moving contact to contact or disconnect from a second fixed contact, so that the structure has the defects of complexity, large volume, high cost and the like.

Disclosure of utility model

The utility model aims at solving the technical problem of providing an improved automatic transfer switching device and a contact system thereof aiming at least one technical defect mentioned in the background art.

The technical scheme adopted for solving the technical problems is as follows: a contact system for an automatic transfer switching device is constructed, which comprises a shell, a first fixed contact arranged in the shell and used for being connected with a common power supply, a second fixed contact used for being connected with a standby power supply, and a movable contact module rotatably arranged in the shell,

The movable contact module comprises a turntable assembly, a first movable contact assembly and a second movable contact assembly, wherein a mounting hole, a first mounting groove and a second mounting groove which are arranged on two sides of the mounting hole are formed in the turntable assembly, the turntable assembly can rotate around the mounting hole, and the positions of the first mounting groove and the second mounting groove are changed through rotation;

The first movable contact assembly comprises a first movable contact rotatably installed in the first installation groove and a first elastic piece arranged on one side, away from the first fixed contact, of the first movable contact, the groove wall of the first installation groove correspondingly pushes the first movable contact to perform contact and separation displacement with the first fixed contact according to the rotation direction of the turntable assembly, the first elastic piece provides contact pressure for the first movable contact under the thrust of the groove wall of the first installation groove, and the first elastic piece is matched with the turntable assembly to realize the overrun of the first movable contact;

The second moving contact assembly comprises a second moving contact rotatably arranged in the second mounting groove and a second elastic piece arranged on one side, deviating from the second fixed contact, of the second moving contact, the groove wall of the second mounting groove correspondingly pushes the second moving contact to conduct displacement contacted with and separated from the second fixed contact according to the rotating direction of the rotating disc assembly, the second elastic piece is pushed by the groove wall of the second mounting groove to provide contact pressure for the second moving contact, and the second elastic piece is matched with the rotating disc assembly to achieve second moving contact overrun.

In some embodiments, the compression amount of the first elastic member gradually increases from the contact of the first moving contact with the first fixed contact to the closing completion;

And/or the compression amount of the second elastic piece gradually increases in the process from the contact of the second moving contact and the second fixed contact to the completion of closing.

In some embodiments, the displacement of the turntable assembly in the rotating direction in the switching-on process of the common power supply is larger than the distance between the first moving contact and the first fixed contact in the rotating direction;

And/or the displacement of the rotary table assembly in the rotating direction in the switching-on process of the standby power supply is greater than the distance between the second movable contact and the second fixed contact in the rotating direction.

In some embodiments, the turntable assembly comprises a chassis, and a first limiting block, a second limiting block, a third limiting block and a fourth limiting block which are arranged on the chassis at intervals in the circumferential direction;

The first limiting block and the second limiting block are matched to form the first mounting groove, the first limiting block is more adjacent to the first fixed contact relative to the second limiting block,

The third limiting block and the fourth limiting block are matched to form the second mounting groove, and the third limiting block is adjacent to the second fixed contact relative to the fourth limiting block.

In some embodiments, the first moving contact assembly further includes a first mating member rotatably mounted on the first moving contact, the first mating member having a first movable wall interposed between the first moving contact and the second stopper, the first elastic member being mounted between the first movable wall and the first moving contact, the first movable wall being adjacent to the first moving contact by the second stopper and being reset by the first elastic member;

and/or, the second moving contact assembly further comprises a second matching piece rotatably installed on the second moving contact, the second matching piece is provided with a second movable wall between the second moving contact and the fourth limiting block, the second elastic piece is installed between the second movable wall and the second moving contact, and the second movable wall approaches the second moving contact through the fourth limiting block and resets through the second elastic piece.

In some embodiments, the first stopper and the second stopper each at least partially abut against the first moving contact assembly when facing the wall surface of the first moving contact assembly in the double-split state;

And/or the third limiting block and the fourth limiting block are at least partially abutted against the second moving contact assembly when facing the wall surface of the second moving contact assembly in the double-split state.

In some embodiments, the first limiting block has a distance from the first moving contact when the common power supply is switched on;

And/or, the third limiting block has a distance with the first moving contact when the standby power supply is switched on.

In some embodiments, the number of the first movable contact assemblies includes at least two, and at least two of the first movable contact assemblies are arranged in the first mounting groove side by side along a direction perpendicular to a plane in which the turntable assembly is located;

And/or the number of the second movable contact assemblies comprises at least two, and the at least two second movable contact assemblies are arranged in the second mounting groove side by side along the direction perpendicular to the plane where the turntable assembly is located.

In some embodiments, the first moving contact assembly and the second moving contact assembly are longitudinally mirror symmetrically mounted on the turntable assembly.

The utility model also constructs an automatic transfer switch electric appliance which comprises a rotating main shaft and a control and operation device for driving the rotating main shaft to rotate and controlling the rotating direction of the rotating main shaft, and the automatic transfer switch electric appliance also comprises the contact system, wherein the rotating main shaft is arranged in the mounting hole in a penetrating way, and the control and operation device drives the turntable assembly to rotate through the rotating main shaft and controls the rotating direction of the turntable assembly.

The implementation of the utility model has the following beneficial effects: the contact system can realize switching of three states of common power supply switching-on, standby power supply switching-on and double-split switching-on in a single-shaft transmission mode, and can provide enough contact pressure and over-travel of the moving contact corresponding to the contact system during switching-on, so that the moving contact and the fixed contact can be reliably contacted, and the reliability of the performance of the contact system is ensured.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of the exterior configuration of the contact system of the present utility model in some embodiments;

FIG. 2 is an exploded view of the contact system of FIG. 1;

FIG. 3 is a schematic illustration of a contact system in a bifurcated state with portions of the components omitted in some embodiments of the utility model;

Figure 4 is an exploded view of the moving contact module of the present utility model in some embodiments;

FIG. 5 is an exploded view of the first movable contact assembly of the present utility model in some embodiments;

FIG. 6 is a schematic illustration of a contact system in accordance with some embodiments of the present utility model, with portions omitted, in a normally closed power state;

fig. 7 is a schematic view of a contact system in accordance with some embodiments of the present utility model, with portions omitted, in a standby power switch-on state.

Reference numerals: a contact system 100; a housing 1; a first shell portion 11; a first hollowed-out portion 111; a second shell portion 12; a moving contact module 2; a first movable contact assembly 21; a first moving contact 211; a first groove portion 2111; a tip 2112; a first movable contact 212; a first elastic member 213; a first rotation shaft 214; a first mating member 215; a first movable wall 2151; a second movable contact assembly 22; a second movable contact 221; a second groove portion 2211; a second movable contact 222; a second elastic member 223; a second rotation shaft 224; a second mating member 225; a second movable wall 2251; a turntable assembly 23; a turntable body 24; a chassis 241; a mounting hole 242; an extension 243; a reinforcing rib 244; a first stopper 245; a second stopper 246; a third stopper 247; a fourth stopper 248; a first mounting slot 249; a second mounting groove 250; a first distance 251; a mounting cover 26; a second shaft portion 261; a first stationary contact 31; a first stationary contact 32; a second stationary contact 41; a second stationary contact 42; a load contact 51; a flexible wire 6; a first arc extinguishing module 7; and a second arc extinguishing module 8.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.

It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present utility model and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

The utility model constructs an automatic transfer switch electrical appliance which adopts a single-shaft transmission mode to realize switching of a common power supply switching-on state, a standby power supply switching-on state and a double-split state, has the advantages of simple structure, small volume, convenient assembly and low cost, and can give enough contact pressure to a moving contact of the automatic transfer switch electrical appliance when the automatic transfer switch electrical appliance is switched on, and the moving contact exceeds the range when the moving contact is switched on, thereby ensuring that the moving contact and a fixed contact can be reliably contacted, and ensuring the reliability of the performance of the automatic transfer switch electrical appliance.

In some embodiments, the automatic transfer switching device may include a contact system 100 (refer to fig. 1) and a control and operation device (not shown), where the contact system 100 is electrically connected to a load, a common power source and a standby power source, and the control and operation system controls the contact system 100 to perform a common power source closing operation, a standby power source closing operation and a double-split operation in a mechanical linkage manner through a rotating spindle.

Of course, the number of contact systems 100 may include one or more, and in some embodiments, the contact systems 100 may include a plurality, with the plurality of contact systems 100 connected side-by-side. The specific construction of the control and operating system and the control method are referred to in the art and will not be described in detail here.

In some embodiments, referring to fig. 1, the contact system 100 may be rectangular parallelepiped in shape, although the contact system 100 may be other shapes, without limitation.

Referring to fig. 2, the contact system 100 may include, in some embodiments, a housing 1, a moving contact module 2 disposed in the housing 1, a first stationary contact 31, a second stationary contact 41, a load contact 51, a first arc extinguishing module 7, and a second arc extinguishing module 8.

The housing 1 is used for providing a mounting foundation and protection for an internal structure, as shown in fig. 2, and may include a first shell portion 11 and a second shell portion 12 that are detachable and combined, where the first shell portion 11 and the second shell portion 12 are respectively provided with a plurality of hollowed-out portions that are mirror-symmetrical, so that components such as the moving contact module 2, the first fixed contact 31, the second fixed contact 41, the load contact 51, the first arc extinguishing module 7, and the second arc extinguishing module 8 can be mounted thereon. It should be noted that, the first housing portion 11 is provided with a first hollow portion 111 for mounting the moving contact module 2, the first hollow portion 111 may be circular and located at a central position of the first housing portion 11, and a through hole (not labeled) for mounting the moving contact module 2 is further provided in the first hollow portion 111. It can be appreciated that the second shell portion 12 is also provided with a second hollow portion (not shown) that is matched with the first hollow portion 111, and the second hollow portion is also provided with a through hole (not shown) that is matched with the moving contact module 2 for installation. Of course, the shapes of the first hollowed-out portion 111 and the second hollowed-out portion may be other shapes, which are not particularly limited.

It should be noted that, for convenience of explanation of the present embodiment, as shown in fig. 3, the following refers to the height direction of the contact system 100 as the longitudinal reference direction, the arrow direction beside the letter up represents the upward direction, and the arrow direction beside the letter down represents the downward direction.

Referring to fig. 3, the housing 1 may be longitudinally divided into an upper half and a lower half, and the first and second fixed contacts 31 and 41 are symmetrically installed on the upper and lower halves of the housing 1, and of course, the positional relationship between the first and second fixed contacts 31 and 41 may be adjusted according to actual needs, which is not limited in detail. The first stationary contact 31 may be connected to a common power source at one end and provided with a first stationary contact 32 at the other end, the first stationary contact 32 being adapted to cooperate with the movable contact module 2, and likewise the second stationary contact 41 may be connected to a standby power source at one end and provided with a second stationary contact 42 at the other end, the second stationary contact 42 being adapted to cooperate with the movable contact module 2.

The first stationary contact 31 and the second stationary contact 41 are mounted on the same side in the lateral direction of the housing 1. And the load contact 51 is installed at the other lateral side of the housing 1, one end of the load contact 51 may be electrically connected to the movable contact module 2 through the flexible wire 6, and the other end thereof may be connected to a load. The movable contact module 2 is interposed between both lateral sides of the housing 1 and rotatably installed at a central position of the housing 1.

The rotating main shaft can penetrate through the shell 1 and penetrate through the movable contact module 2 in a direction perpendicular to the plane where the shell 1 is located. Under the drive of the control and operation system, the rotating main shaft can realize autorotation and drive the moving contact module 2 to rotate circumferentially around the rotating main shaft, and the rotating direction of the moving contact module 2 is parallel to or coincident with the plane where the shell 1 is located. The movable contact module 2 may be in contact with the first stationary contact 32 or the second stationary contact 42 according to a rotation direction, so as to switch to a normal power on state or a standby power on state, or may not be in contact with the first stationary contact 32 and the second stationary contact 42, so as to switch to a double-split state.

As shown in fig. 3, it should be noted that, in fig. 3, a part of the structure of the first arc extinguishing module 7 is omitted, the first arc extinguishing module 7 may be installed in the housing 1 at a position corresponding to the first stationary contact 32, the first stationary contact 32 is located in the first arc extinguishing module 7, and the first arc extinguishing module 7 may rapidly extinguish an arc generated between the first stationary contact 32 and the moving contact module 2. Likewise, the second arc extinguishing module 8 may be mounted in the housing 1 in a position corresponding to the second stationary contact 42, the second stationary contact 42 being located in the second arc extinguishing module 8.

As shown in fig. 3, the moving contact module 2 may in some embodiments include a turntable assembly 23 and first and second moving contact assemblies 21 and 22 mounted on the turntable assembly 23. The turntable assembly 23 is rotatably installed in the first hollow portion 111 and the second hollow portion of the housing 1, and the rotating shaft is arranged on the turntable assembly 23 in a penetrating manner, so as to drive the turntable assembly 23 to rotate.

The turntable assembly 23 is provided with a first mounting groove 249 and a second mounting groove 250, the first mounting groove 249 is relatively positioned at the upper half part of the housing 1 and is used for mounting the first movable contact assembly 21 therein, the second mounting groove 250 is relatively positioned at the lower half part of the housing 1 and is used for mounting the second movable contact assembly 22 therein, when the turntable assembly 23 rotates, the groove wall of the first mounting groove 249 pushes the first movable contact assembly 21 to rotate along with the second movable contact assembly 22, and the groove wall of the second mounting groove 250 also pushes the second movable contact assembly 22 to rotate along with the first movable contact assembly 21 and the second movable contact assembly 22 simultaneously, and the rotation directions of the first movable contact assembly 21 and the second movable contact assembly are the same.

In some embodiments, referring to fig. 4, the turntable assembly 23 may include a turntable body 24 and a mounting cover 26 that fits over the turntable body 24.

The turntable body 24 may be mounted in the first hollow portion 111, and may include a chassis 241, which may have a trapezoid shape, a plane of the chassis 241 is parallel to or coincides with a plane of the first shell portion 11, and one side of a long side of the chassis 241 may be adjacent to the load contact 51, and a protruding first shaft portion may be disposed on a surface of the chassis 241 facing the first shell portion 11, and may be mounted in a through hole in the first hollow portion 111.

The center of the chassis 241 is provided with a mounting hole 242 and an extension portion 243 protruding towards the surface of the chassis 241 away from the first shell portion 11 along the edge of the mounting hole 242, the mounting hole 242 is used for the spindle to pass through, and the extension portion 243 is used for increasing the contact area between the spindle and the chassis 241, which is beneficial for the rotation of the chassis 241. Optionally, a reinforcing rib 244 is further disposed on one circumferential side of the extension 243, so as to strengthen the overall structural strength of the turntable body 24 and prevent the turntable body 24 from deforming.

With continued reference to fig. 4, first and second mounting grooves 249 and 250 are formed on a surface of the chassis 241 facing away from the first shell portion 11 on both sides of the mounting hole 242, and in some embodiments, the surface of the chassis 241 facing away from the first shell portion 11 is convex to form first, second, third, and fourth stoppers 245, 246, 247, 248 circumferentially spaced along an edge of the chassis 241. Alternatively, the first limiting block 245, the second limiting block 246, the third limiting block 247 and the fourth limiting block 248 may be integrally formed with the chassis 241, and of course, may be fixed on the chassis 241 by bonding, screwing, or the like.

Turning to fig. 3, fig. 3 omits at least the mounting cap 26 for ease of illustration of the internal structure of the turret body 24. The first limiting block 245 and the second limiting block 246 are located at the upper half part of the housing 1 at least in the opening state, the first limiting block 245 is closer to the first stationary contact 32 than the second limiting block 246, a first mounting groove 249 is formed among the first limiting block 245, the second limiting block 246 and the extending part 243, and the wall surfaces of the first limiting block 245 and the second limiting block 246, which face the first moving contact assembly 21, serve as two side groove walls of the first mounting groove 249 for pushing the first moving contact assembly 21 to rotate; the third and fourth stoppers 247 and 248 are located at the lower half of the housing 1 at least in the open state, and the third stopper 247 is closer to the second stationary contact 42 than the fourth stopper 248, and the second mounting groove 250 may be formed between the third stopper 247, the fourth stopper 248 and the extension 243, where the wall surfaces of the third and fourth stoppers 247 and 248 facing the second movable contact assembly 22 respectively serve as two side groove walls of the second mounting groove 250 for pushing the second movable contact assembly 22 to rotate.

Referring back to fig. 4, the mounting cover 26 is used to fix the first moving contact assembly 21 and the second moving contact assembly 22 in the turntable body 24, and the shape of the mounting cover 26 may be adapted to the shape of the chassis 241, and the plane of the mounting cover is parallel to or coincides with the plane of the second shell portion 12. Alternatively, the surface of the mounting cover 26 facing the second shell portion 12 is provided with a protruding second shaft portion 261, and the second shaft portion 261 is mountable in the through hole of the second hollowed-out portion. With the cooperation of the first shaft portion and the second shaft portion 261, the entire turntable assembly 23 is smoothly rotated in the casing 1.

In some embodiments, one end of the first moving contact assembly 21 is mounted in the first mounting groove 249, and the other end of the first moving contact assembly 21 is contactable with the first stationary contact 32 by rotation of the turntable body 24. Optionally, under the working condition of high current (above 400A), the current carrying capacity of a single movable contact assembly is insufficient, and a plurality of movable contact assemblies can be arranged to bear excessive current carrying capacity, so that accidents caused by excessive current carrying are avoided. Thus, referring to fig. 4, the first movable contact assembly 21 may be provided with two or more first movable contact assemblies 21 disposed in the first mounting groove 249 side by side along the width direction of the contact system 100, and in the normal power on state, the two or more first movable contact assemblies 21 simultaneously contact the first contact point (the first contact point may be widened appropriately). Moreover, the first moving contact assemblies 21 are independent of each other and do not interfere with each other, and the operation of the remaining first moving contact assemblies 21 is not affected when one or a part of the first moving contact assemblies 21 fail.

In some embodiments, referring to fig. 5, the first moving contact assembly 21 includes a first moving contact 211, a first elastic member 213, a first rotating shaft 214, and a first mating member 215.

The first moving contact 211 is a longitudinal plate structure, referring to fig. 3, one end of the first moving contact 211 is a fixed end, and is installed in the first installation slot 249, the other end is a free end, and can extend out of the chassis 241, and a side of the free end of the first moving contact 211 adjacent to the first stationary contact 32 is provided with a first moving contact 212, which is responsible for contacting with the first stationary contact 32. Next, a first groove portion 2111 is provided on a side of the first moving contact 211 facing away from the first stationary contact 32, for mounting one end of the first elastic member 213 therein.

Optionally, as shown in fig. 5, a protruding tip 2112 is provided on a side of the free end of the first moving contact 211 away from the first stationary contact 32, and the tip 2112 is used for protecting the first moving contact 212 and the first stationary contact 32, because an arc will be generated between the first moving contact 212 and the first stationary contact 32 when the switch is opened, and the tip 2112 is designed to accelerate the arc to leave and move onto the tip 2112, thereby protecting the first moving contact 212 and the first stationary contact 32.

Referring to fig. 4 and 5, the first rotation shaft 214 passes through the fixed end of the first moving contact 211 in a direction perpendicular to the plane of the first moving contact 211 and is fixed on the chassis 241, so that the first moving contact 211 can rotate around the first rotation shaft 214. It will be appreciated that when at least two first moving contact assemblies 21 are provided, the length of the first rotation shaft 214 may be appropriately lengthened, and the first rotation shaft 214 is provided through all the first moving contacts 211.

Referring to fig. 3 and fig. 5, in order to facilitate the display of the first elastic member 213, at least a portion of the first mating member 215 is omitted in fig. 3, the first mating member 215 has a U-shaped structure and is disposed around a side of the first moving contact 211 facing away from the first stationary contact 32, the first mating member 215 has a first movable wall 2151 interposed between the first moving contact 211 and the second limiting block 246, and two ends of the first mating member 215 are connected to the first rotating shaft 214, and the first movable wall 2151 can rotate around the first rotating shaft 214.

One end of the first elastic member 213 is installed in the first groove portion 2111 of the first moving contact 211, and the other end thereof is fixed to the first movable wall 2151, and is pressed by the rotation of the first movable wall 2151 in the direction of the first moving contact 211, thereby being compressed. Alternatively, the first elastic member 213 may be a spring, and of course, may be an elastic object, such as a spring plate, etc.

It will be appreciated that, as a preferred solution, the first mating member 215 and the first groove portion 2111 may play a role of limiting, so as to prevent the first elastic member 213 from being deviated during the movement, but they are not necessary components of the present first moving contact assembly 21, and in the case that there is no first mating member 215 and first groove portion 2111, two ends of the first elastic member 213 may be directly connected to a side surface of the first moving contact 211 facing away from the first stationary contact 32 and the second limiting block 246.

Likewise, one or at least two second movable contact assemblies 22 may be provided, and when at least the second movable contact assemblies 22 are provided, they may be disposed side by side in the first mounting groove 249 in the width direction of the contact system 100.

Referring to fig. 3, 4 and 6, the second moving contact assembly 22 may include a second moving contact 221, a second elastic member 223, a second rotating shaft 224 and a second mating member 225, wherein the second moving contact 221 is provided with a second moving contact 222, a second groove 2211 and a pointed tip 2112, and the second mating member 225 has a second movable wall 2251. It will be appreciated that the internal structure of the second movable contact assembly 22 may be identical to that of the first movable contact assembly 21, and reference may be made to the above description of the internal structure of the first movable contact assembly 21, which is not specifically expanded herein. The mounting direction of the second moving contact assembly 22 may be symmetrical to the mounting direction of the first moving contact assembly 21.

The following describes the state switching process and the positional relationship of the present contact system 100 with reference to fig. 3 and 6:

in the double-split state, as shown in fig. 3, the first moving contact assembly 21, the second moving contact assembly 22 and the mounting hole 242 are longitudinally arranged, where the first moving contact assembly 21 and the second moving contact assembly 22 are mirror-symmetrical, and the first elastic member 213 and the second elastic member 223 are both in an initial state, where the initial state includes a natural state (a state where the spring member is not affected by an external force) or a slightly compressed state, at this time, the first limiting block 245 may abut against the first moving contact 211, the second limiting block 246 may abut against the first moving wall 2151, the third limiting block 247 may abut against the second moving contact 221, and the fourth limiting block 248 may abut against the second moving wall 2251.

In the process of switching the double-split state to the normal power supply closing state, referring to fig. 3 and 6, the whole rotating disc assembly 23 rotates anticlockwise under the transmission of the rotating main shaft, the second limiting block 246 pushes the whole first moving contact assembly 21 to rotate anticlockwise around the center (or the rotating main shaft) of the rotating disc assembly 23 until the first moving contact 212 is in contact with the first fixed contact 32, and the first limiting block 245 can continue anticlockwise rotation and the first moving contact 211 cannot continue displacement, so that a gap starts to be generated between the first limiting block 245 and the first moving contact 211, the first movable wall 2151 is pushed by the second limiting block 246 to be close to the first moving contact 211 around the first rotating shaft 214, the first elastic piece 213 is compressed, and finally the first moving contact 212 is completely abutted with the first fixed contact 32, so that the normal power supply closing action is completed. It can be seen that, in the process that the first moving contact 211 approaches the first fixed contact 31 but is not in contact with the first fixed contact 31, the compression amount of the first elastic member 213 is unchanged, and in the process that the first moving contact 211 contacts the first fixed contact 31 until closing is completed, the compression amount of the first elastic member 213 is gradually increased.

Of course, the state and the positional relationship of the first movable contact assembly 21 may be appropriately adjusted during the switching process, and need not be completely as described above. For example, the first moving contact 211 may rotate and the first movable wall 2151 approaches the first moving contact 211 at the same time under the pushing of the second limiting block 246.

As shown in fig. 6, in the normal power on state, the first stopper 245 and the first moving contact 211 have the largest distance therebetween with the first distance 251 therebetween, and as shown in fig. 6 (at least a portion of the first elastic member 213 is omitted in fig. 6 for convenience of showing the state of the first elastic member 213), the first elastic member 213 is in the maximum compression state, and the compression amount becomes the maximum (the maximum compression state is relative to the double-split state and the process of switching the double-split state to the normal power on state). It will be appreciated that the displacement of the turntable assembly 23 in the rotating direction during the switching-on process of the conventional power supply is greater than the distance between the first moving contact 211 and the first fixed contact 31 in the rotating direction, and the first elastic member 213 helps the first moving contact 212 to implement over travel, so as to avoid the problem of poor contact of the first moving contact 212 or the first fixed contact 32 due to abrasion, and on the other hand, provides the contact pressure of the first moving contact 212 against the first fixed contact 32, so as to ensure reliable contact between the first moving contact 212 and the first fixed contact 32. In addition, the first elastic member 213 may also play a role in buffering, avoiding a strong collision when the first movable contact 212 and the first stationary contact 32 just contact, and obtaining a certain initial kinetic energy between the first movable contact 212 and the first stationary contact 32 when they are separated, so as to increase the initial opening speed and effectively reduce the arcing time.

When the switching from the normal power switch-on state to the double-split state is further performed, referring to fig. 3 and 6, the whole turntable assembly 23 rotates clockwise under the transmission of the rotating spindle, and since the force applied by the second limiting block 246 to the first elastic member 213 is reduced, the first elastic member 213 begins to rebound, the first movable wall 2151 is far away from the first movable contact 211 around the first rotating shaft 214 under the elastic force of the first elastic member 213, and of course, the first movable wall 2151 is always abutted against the second limiting block 246. While the first movable wall 2151 is away from the first movable contact 211, the interval between the first stopper 245 and the first movable contact 211 is gradually reduced until the first stopper 245 is abutted against the first movable contact 211 again, at this time, the first elastic member 213 is restored to the initial state, and then the first stopper 245 pushes the whole first movable contact assembly 21 to rotate counterclockwise around the center (or the rotation main shaft) of the turntable assembly 23 until the first movable contact assembly 21 returns to the position of the double-split state.

Next, during the switching process between the normal power switch-on state and the double-split state, the second movable wall 2251 is always abutted against the fourth limiting block 248, and one side of the second movable contact 221 adjacent to the third limiting block 247 is always abutted against the third limiting block 247.

It will be appreciated that the switching process between the standby power closing state and the double-split state and the standby power closing state may be similar to the switching process between the normal power closing state and the double-split state and the normal power closing state with reference to the above and fig. 7, except that the rotation direction may be reversed.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. A contact system for an automatic transfer switching device, the contact system comprising a housing (1), a first stationary contact (31) arranged in the housing (1) and used for being connected with a common power supply, and a second stationary contact (41) used for being connected with a standby power supply, characterized by further comprising a movable contact module (2) rotatably arranged in the housing (1),

The movable contact module (2) comprises a turntable assembly (23), a first movable contact assembly (21) and a second movable contact assembly (22), wherein a mounting hole (242) and a first mounting groove (249) and a second mounting groove (250) which are arranged on two sides of the mounting hole (242) are arranged on the turntable assembly (23), and the turntable assembly (23) can rotate around the mounting hole (242);

The first movable contact assembly (21) comprises a first movable contact (211) rotatably installed in the first installation groove (249) and a first elastic piece (213) arranged on one side of the first movable contact (211) away from the first fixed contact (31), the groove wall of the first installation groove (249) correspondingly pushes the first movable contact (211) to perform displacement for contacting and separating with the first fixed contact (31) according to the rotating direction of the rotating disc assembly (23), the first elastic piece (213) provides contact pressure for the first movable contact (211) by the thrust of the groove wall of the first installation groove (249), and the first elastic piece is matched with the rotating disc assembly (23) to realize overrun of the first movable contact (211);

the second movable contact assembly (22) comprises a second movable contact (221) rotatably installed in the second installation groove (250) and a second elastic piece (223) arranged on one side, deviating from the second fixed contact (41), of the second movable contact (221), the groove wall of the second installation groove (250) correspondingly pushes the second movable contact (221) to perform displacement for contacting and separating with the second fixed contact (41) according to the rotating direction of the rotating disc assembly (23), the second elastic piece (223) is pushed by the groove wall of the second installation groove (250) to provide contact pressure for the second movable contact (221), and the second elastic piece is matched with the rotating disc assembly (23) to realize overtravel of the second movable contact (221).

2. The contact system according to claim 1, wherein the compression amount of the first elastic member (213) gradually increases from the time when the first moving contact (211) contacts the first stationary contact (31) to the time when closing is completed;

And/or the compression amount of the second elastic piece (223) is gradually increased in the process from the contact of the second moving contact (221) and the second fixed contact (41) to the completion of closing.

3. The contact system according to claim 1, wherein the amount of displacement of the turntable assembly (23) in the rotational direction during closing of a common power supply is greater than the distance between the first movable contact (211) and the first stationary contact (31) in the rotational direction;

And/or the displacement of the rotary table assembly (23) in the rotating direction in the switching-on process of the standby power supply is larger than the distance between the second movable contact (221) and the second fixed contact (41) in the rotating direction.

4. The contact system of claim 1, wherein the turntable assembly (23) includes a chassis (241) and first (245), second (246), third (247) and fourth (248) stoppers disposed on the chassis (241) in circumferentially spaced apart arrangement;

The first limiting block (245) and the second limiting block (246) are matched to form the first mounting groove (249), the first limiting block (245) is more adjacent to the first fixed contact (31) relative to the second limiting block (246),

The third limiting block (247) and the fourth limiting block (248) are matched to form the second mounting groove (250), and the third limiting block (247) is adjacent to the second fixed contact (41) relative to the fourth limiting block (248).

5. The contact system according to claim 4, wherein the first movable contact assembly (21) further comprises a first mating member (215) rotatably mounted on the first movable contact (211), the first mating member (215) having a first movable wall (2151) interposed between the first movable contact (211) and the second stopper (246), the first elastic member (213) being mounted between the first movable wall (2151) and the first movable contact (211), the first movable wall (2151) being brought closer to the first movable contact (211) by means of the second stopper (246) and being reset by means of the first elastic member (213);

And/or, the second moving contact assembly (22) further comprises a second matching piece (225) rotatably installed on the second moving contact (221), the second matching piece (225) is provided with a second movable wall (2251) between the second moving contact (221) and the fourth limiting block (248), the second elastic piece (223) is installed between the second movable wall (2251) and the second moving contact (221), and the second movable wall (2251) approaches to the second moving contact (221) through the fourth limiting block (248) and resets through the second elastic piece (223).

6. The contact system of claim 4, wherein the first stopper (245) and the second stopper (246) each abut the first moving contact assembly (21) at least partially when facing a wall surface of the first moving contact assembly (21) in a double-split state;

And/or, the wall surfaces of the third limiting block (247) and the fourth limiting block (248) which face the second movable contact assembly (22) at least partially abut against the second movable contact assembly (22) in the double-split state.

7. The contact system according to claim 6, characterized in that the first stopper (245) has a distance to the first moving contact (211) when the common power supply is switched on;

And/or, the third limiting block (247) has a distance with the first moving contact (211) when the standby power supply is switched on.

8. The contact system according to claim 1, wherein the number of first moving contact assemblies (21) comprises at least two, at least two of the first moving contact assemblies (21) being arranged side by side in the first mounting slot (249) in a direction perpendicular to the plane in which the turntable assembly (23) lies;

And/or the number of the second movable contact assemblies (22) comprises at least two, and the at least two second movable contact assemblies (22) are arranged in the second mounting groove (250) side by side along the direction perpendicular to the plane where the turntable assembly (23) is arranged.

9. Contact system according to claim 1, characterized in that the first moving contact assembly (21) and the second moving contact assembly (22) are mounted on the turntable assembly (23) longitudinally mirror-symmetrically.

10. An automatic transfer switching device comprising a rotating spindle and a control and operation device for driving the rotating spindle to rotate and controlling the rotating direction of the rotating spindle, wherein the automatic transfer switching device further comprises a contact system according to any one of claims 1 to 9, the rotating spindle is arranged in the mounting hole (242) in a penetrating manner, and the control and operation device drives the turntable assembly (23) to rotate through the rotating spindle and controls the rotating direction of the turntable assembly (23).