CN219677152U - Contactor - Google Patents

Abstract

Embodiments of the present disclosure provide a contactor including: the switch assembly comprises a switch shell, a movable support, a plurality of driving contacts, a plurality of main fixed contacts and a reset piece, wherein the movable support is slidably arranged in the switch shell in a penetrating manner, the plurality of main fixed contacts are arranged on the switch shell, the plurality of driving contacts are arranged on the movable support and correspond to the plurality of main fixed contacts, and the reset piece is used for resetting the movable support relative to the switch shell; an arc extinguishing assembly comprising an arc extinguishing housing detachably connected with the switch housing, wherein the movable support, the plurality of active contacts and the plurality of main stationary contacts are covered by the arc extinguishing housing in case the arc extinguishing housing is connected with the switch housing, and the movable support, the plurality of active contacts and the plurality of main stationary contacts are not covered by the arc extinguishing housing in case the arc extinguishing housing is separated from the switch housing; and an electromagnetic assembly configured to drive the movable mount to move toward the electromagnetic assembly upon energization.

Description

Contactor

Technical Field

Embodiments of the present disclosure relate generally to the field of electrical equipment technology, and more particularly, to a contactor.

Background

The contactor is an electric device which uses a coil to flow current to generate a magnetic field so as to connect a moving contact and a fixed contact, thereby achieving the purpose of controlling a load. Under the condition of short circuit experiments or the condition that the contact of the contactor is worn over time, the connection part of the moving contact and the fixed contact can generate high temperature, so that fusion welding phenomenon occurs at the connection part of the moving contact and the fixed contact.

In the case of the conventional contactor, the welding is difficult to be released due to the structural design in the case of the welding phenomenon.

Disclosure of Invention

It is an object of the present disclosure to provide a contactor to at least partially solve the above-mentioned problems.

In a first aspect of the present disclosure, there is provided a contactor comprising: the switch assembly comprises a switch shell, a movable support, a plurality of driving contacts, a plurality of main fixed contacts and a reset piece, wherein the movable support is slidably arranged in the switch shell in a penetrating manner, the plurality of main fixed contacts are arranged on the switch shell, the plurality of driving contacts are arranged on the movable support and correspond to the plurality of main fixed contacts, and the reset piece is used for resetting the movable support relative to the switch shell; an arc extinguishing assembly including an arc extinguishing housing detachably connected with the switch housing, wherein the movable bracket, the plurality of active contacts, and the plurality of main stationary contacts are covered by the arc extinguishing housing in a case where the arc extinguishing housing is connected with the switch housing, and the movable bracket, the plurality of active contacts, and the plurality of main stationary contacts are not covered by the arc extinguishing housing in a case where the arc extinguishing housing is separated from the switch housing; and an electromagnetic assembly arranged to drive the movable support towards, upon energisationTo move toward the electromagnetic assembly _。

In the embodiment according to the present disclosure, in case that it is required to release fusion welding between the active contact and the main stationary contact of the contactor, the arc extinguishing housing may be separated from the switch housing to remove the arc extinguishing assembly, so that the movable bracket, the plurality of active contacts, and the plurality of main stationary contacts are not covered by the arc extinguishing housing, and the fusion welding is easily released. Therefore, the contactor disclosed by the utility model is easy to disassemble, and can be conveniently released after fusion welding occurs in the contactor.

In some embodiments, the switch assembly further includes a plurality of main springs corresponding to the plurality of active contacts, the movable support is provided with a plurality of first mounting grooves, the active contacts and the corresponding main springs are disposed in the corresponding first mounting grooves, and the main springs are connected to a side of the corresponding active contacts facing away from the corresponding main stationary contacts.

In some embodiments, the switch assembly further comprises an auxiliary contact assembly disposed in the arc extinguishing housing and detachably connectable to an end of the movable bracket facing the arc extinguishing housing.

In some embodiments, a snap fastener is disposed at an end of the movable support facing the arc extinguishing housing, the auxiliary contact assembly includes an auxiliary moving contact support slidably connected to the arc extinguishing housing, a snap hole corresponding to the snap fastener is disposed on the auxiliary moving contact support, and the snap fastener is snapped to the snap hole.

In some embodiments, a guide member is further disposed at an end of the movable support toward the arc extinguishing housing, and a guide groove corresponding to the guide member is disposed on the auxiliary moving contact support, and the guide member is inserted into the guide groove.

In some embodiments, the arc extinguishing case is provided with an opening for exposing the snap hole.

In some embodiments, the auxiliary contact assembly further comprises a first auxiliary moving contact, a second auxiliary moving contact and an auxiliary spring corresponding to the first auxiliary moving contact and the second auxiliary moving contact, two second mounting grooves are formed in the auxiliary moving contact support, the first auxiliary moving contact and the corresponding auxiliary spring are arranged in one of the second mounting grooves, and the second auxiliary moving contact and the corresponding auxiliary spring are arranged in the other second mounting groove.

In some embodiments, the auxiliary contact assembly further comprises a first auxiliary fixed contact mated with the first auxiliary moving contact and a second auxiliary fixed contact mated with the second auxiliary moving contact, the first auxiliary fixed contact and the second auxiliary fixed contact being inserted into the arc extinguishing housing.

In some embodiments, the electromagnetic assembly includes a coil and a first core surrounded by the coil, and an end of the movable bracket near the electromagnetic assembly is provided with a second core corresponding to the first core.

In some embodiments, the arc extinguishing assembly further includes a first conductive member passing through the arc extinguishing housing and the switch assembly and connected with one end of the coil, and a second conductive member passing through the arc extinguishing housing and the switch assembly and connected with the other end of the coil.

It should be understood that what is described in this section is not intended to limit the key features or essential features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:

fig. 1 shows a schematic structural view of a conventional contactor;

FIG. 2 shows an exploded schematic view of the contactor shown in FIG. 1;

fig. 3 illustrates a schematic structural view of a contactor according to some embodiments of the present disclosure;

FIG. 4 shows an exploded schematic view of the contactor shown in FIG. 3;

fig. 5 illustrates a schematic structural view of a movable bracket according to some embodiments of the present disclosure;

fig. 6 illustrates a schematic structural view of an auxiliary contact assembly according to some embodiments of the present disclosure;

fig. 7-9 illustrate an assembly process of a contactor according to some embodiments of the present disclosure;

fig. 10-12 illustrate a release process of fusion welding of a contactor according to some embodiments of the present disclosure.

Reference numerals illustrate:

100 is a contactor;

10 is a switch main body part, 101 is a contact cover plate, and 20 is a supporting part;

1 is a switch assembly, 11 is a switch shell, 12 is a movable bracket, 121 is a first mounting groove, 122 is a buckle piece, 123 is a second iron core, 124 is a connecting hole, 125 is a guide piece, 13 is a driving contact, 14 is a main fixed contact, 15 is a main spring, 16 is an auxiliary contact assembly, 161 is an auxiliary moving contact bracket, 1611 is a second mounting groove, 1612 is a buckle hole, 1613 is a guide groove, 162 is a first auxiliary moving contact, 163 is a second auxiliary moving contact, 164 is a first auxiliary fixed contact, 165 is a second auxiliary fixed contact, and 166 is an auxiliary spring;

2 is an arc extinguishing assembly, 21 is an arc extinguishing shell, 211 is an opening, 22 is a first conductive piece, 23 is a second conductive piece, and 24 is a mounting screw;

3 is an electromagnetic assembly, 31 is a coil, and 32 is a first iron core;

and 4 is a face cover.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object.

Fig. 1 shows a schematic structural view of a conventional contactor 100; fig. 2 shows an exploded schematic view of the contactor 100 shown in fig. 1. As shown in fig. 1 and 2, the conventional contactor 100 includes a switch main body portion 10, a support portion 20, an electromagnetic assembly 3, and a face cover 4, the switch main body portion 10 is inserted into the support portion 20, and one end of the switch main body portion 10 is connected to the electromagnetic assembly 3, and the other end of the switch main body portion 10 is connected to the face cover 4. The switch body portion 10 includes a movable bracket 12, a drive contact 13, a main stationary contact 14, a main spring 15, and a contact cover 101.

The movable bracket 12 is slidably provided in the support portion 20. A first mounting groove 121 is formed in the movable support 12, the active contact 13 and the main spring 15 are mounted in the first mounting groove 121, and the main spring 15 is connected with the end portion, close to the face cover 4, of the active contact 13. A connecting hole 124 is formed at the end of the movable support 12 near the face cover 4, one end of the contact cover plate 101 is inserted into the connecting hole 124 and connected with the main spring 15, and the other end of the contact cover plate 101 is inserted into the face cover 4. The main stationary contact 14 is disposed inside the supporting portion 20 and is disposed corresponding to the active contact 13.

As described hereinabove, the contact 100 may wear out in a short circuit test, or after a period of operation of the contact 100, the active contact 13 and/or the main stationary contact 14, so that fusion welding may easily occur at the contact position of the active contact 13 and the main stationary contact 14. With the above configuration, on the one hand, the active contact 13 and the main stationary contact 14 are both located inside the supporting portion 20 and are located at a deeper position. If the fusion welding is directly released by a screwdriver, the fusion welding is difficult to release due to the weak stress points and the difficult selection of the releasing direction. On the other hand, if the fusion welding is released after the contact cover plate 101 is selectively removed, the stiffness coefficient of the main spring 15 needs to be large due to the large current flowing through the active contact 13, that is, the reaction force provided when the main spring 15 is compressed is large. Therefore, the contact cover plate 101 is tightly engaged with the connection hole 124, so that it is difficult to remove the contact cover plate 101, and the contact cover plate 101 is damaged due to a slightly large force, which finally results in that the fusion welding is difficult to remove. Further, the auxiliary contact assembly is disposed at one side of the movable bracket 12, and since the stiffness coefficient of the main spring 15 in the movable bracket 12 is larger than that of the auxiliary spring of the auxiliary contact assembly, the reaction force provided when the main spring 15 is compressed is larger than that provided when the auxiliary spring is compressed in the case that the main spring 15 and the auxiliary spring are compressed at the same interval. In this case, the force of the spring acting on the movable bracket 12 is unbalanced.

To solve the above-described technical problems, an embodiment of the present disclosure provides a contactor 100 for rapidly releasing fusion welding in case fusion welding occurs at a contact position of a driving contact 13 and a main stationary contact 14. Hereinafter, the principles of the present disclosure will be described with reference to fig. 3 to 12.

Fig. 3 illustrates a schematic structural view of a contactor 100 according to some embodiments of the present disclosure, and fig. 4 illustrates an exploded schematic view of the contactor 100 illustrated in fig. 3. As shown in fig. 3 and 4, the contactor 100 described herein generally includes a switching assembly 1, an arc extinguishing assembly 2, an electromagnetic assembly 3, and a face cover 4.

In some embodiments, the switch assembly 1 includes a switch housing 11, a movable bracket 12, a plurality of active contacts 13, a plurality of main stationary contacts 14, and a reset member (not shown). The inside of the switch housing 11 is provided with a moving passage (not shown) for supporting the movable bracket 12 such that the movable bracket 12 is slidably provided in the switch housing 11. A plurality of main stationary contacts 14 are provided on the switch housing 11. The plurality of active contacts 13 are disposed on the movable bracket 12, and the plurality of active contacts 13 are disposed corresponding to the plurality of main stationary contacts 14. In the case of sliding of the movable support 12, the active contact 13 can be synchronously driven to move toward or away from the main fixed contact 14, so that the active contact 13 and the main fixed contact 14 are connected or separated. The reset element serves to reset the movable support 12 relative to the switch housing 11, in other words to change the active contact 13 and the main stationary contact 14 from the connected state to the disconnected state.

Fig. 5 illustrates a schematic structural view of a movable bracket 12 according to some embodiments of the present disclosure. Referring to fig. 3 to 5, a plurality of first mounting grooves 121 are provided on the movable bracket 12. A plurality of active contacts 13 are disposed within the first mounting slot 121 of the movable bracket 12. The switch assembly 1 further comprises a plurality of main springs 15. The active contact 13 and the corresponding main spring 15 are arranged in the corresponding first mounting groove 121. The main springs 15 are connected to the side of the respective active contact 13 facing away from the main stationary contact 14. In the case where the movable bracket 12 slides in a predetermined direction to bring the active contact 13 and the main stationary contact 14 from the separated state to the connected state, the movable bracket 12 continues to slide in this direction, so that the main spring 15 is compressed. Thus, the main spring 15 applies a force to the active contact 13 and brings the active contact 13 into close contact with the main stationary contact 14. In this case, the contact resistance between the active contact 13 and the main static contact 14 is relatively small, so that the problem of heating at the contact position of the active contact 13 and the main static contact 14 can be effectively avoided, and the occurrence of fusion welding is further reduced.

As shown in fig. 4, in some embodiments, the arc extinguishing assembly 2 includes an arc extinguishing housing 21, and the arc extinguishing housing 21 is detachably connected with the switch housing 11. In the case where the arc extinguishing housing 21 is connected to the switch housing 11, the movable bracket 12, the plurality of active contacts 13, and the plurality of main stationary contacts 14 are covered by the arc extinguishing housing 21. In the case where the arc extinguishing housing 21 is separated from the switch housing 11, the movable bracket 12, the plurality of active contacts 13, and the plurality of main stationary contacts 14 are not covered by the arc extinguishing housing 21. With the above configuration, in the case where it is necessary to release fusion welding at the contact position of the active contact 13 and the main stationary contact 14, the arc extinguishing housing 21 can be separated from the switch housing 11 to remove the arc extinguishing assembly 2, so that the movable bracket 12, the plurality of active contacts 13, and the plurality of main stationary contacts 14 are exposed, and thus fusion welding release is easy.

With continued reference to fig. 4, in some embodiments, the arc chute assembly 2 further includes a mounting screw 24, the mounting screw 24 passing through the arc chute 21 and being secured to the switch housing 11 to effect connection of the arc chute 21 to the switch housing 11. When the arc extinguishing assembly 2 needs to be removed from the switch housing 11, the arc extinguishing assembly 2 can be removed by simply unscrewing the mounting screw 24 from the switch housing 11. In other embodiments, the arc extinguishing housing 21 and the switch housing 11 may also be snapped or otherwise connected, as embodiments of the present disclosure are not limited in this regard.

In some embodiments, the switch assembly 1 further includes an auxiliary contact assembly 16, as shown in fig. 6-9. Fig. 6 illustrates a schematic structural view of the auxiliary contact assembly 16 according to some embodiments of the present disclosure, and fig. 7-9 illustrate an assembly process of the contactor 100 according to some embodiments of the present disclosure. The structure and mounting position of the auxiliary contact assembly 16 will be described below in connection with fig. 6-9.

As shown in connection with fig. 6 to 9, the auxiliary contact assembly 16 is provided in the arc extinguishing housing 21 and can be connected to an end of the movable bracket 12 facing the arc extinguishing housing 21. Since the auxiliary contact assembly 16 is provided at the end of the movable bracket 12 facing the arc extinguishing housing 21, the forces acting on the movable bracket 12 by the respective main springs 13 are distributed in a balanced manner with respect to the movable bracket 12.

As shown in fig. 6, in some embodiments, the auxiliary contact assembly 16 includes an auxiliary moving contact bracket 161, a first auxiliary moving contact 162, a second auxiliary moving contact 163, and an auxiliary spring 166 corresponding to the first auxiliary moving contact 162 and the second auxiliary moving contact 163. Two second mounting grooves 1611 are formed in the auxiliary moving contact support 161, the first auxiliary moving contact 162 and the corresponding auxiliary spring 166 are arranged in one second mounting groove 1611, and the second auxiliary moving contact 163 and the corresponding auxiliary spring 166 are arranged in the other second mounting groove 1611. The auxiliary moving contact bracket 161 is connected to the arc extinguishing case 21 and is slidable with respect to the arc extinguishing case 21. In the case where the movable bracket 12 slides with respect to the switch housing 11, the auxiliary moving contact bracket 161 can be driven to slide with respect to the arc extinguishing housing 21. The auxiliary moving contact holder 161 can simultaneously drive the first auxiliary moving contact 162, the second auxiliary moving contact 163, and the auxiliary spring 166 to slide when sliding.

As shown in fig. 6 and 7, in some embodiments, the auxiliary springs 166 provided corresponding to the first auxiliary moving contacts 162 are located between the groove walls of the respective second mounting grooves 1611 and the end surfaces of the first auxiliary moving contacts 162 facing away from the movable bracket 12. The auxiliary springs 166 provided corresponding to the second auxiliary moving contacts 163 are located between the groove walls of the corresponding second mounting grooves 1611 and the end surfaces of the second auxiliary moving contacts 163 facing the movable bracket 12. In other embodiments, the auxiliary springs 166 disposed corresponding to the first auxiliary moving contacts 162 may also be located between the groove walls of the respective second mounting grooves 1611 and the end surfaces of the first auxiliary moving contacts 162 facing the movable bracket 12, and the auxiliary springs 166 disposed corresponding to the second auxiliary moving contacts 163 may also be located between the groove walls of the respective second mounting grooves 1611 and the end surfaces of the second auxiliary moving contacts 163 facing away from the movable bracket 12. Embodiments of the present disclosure are not limited in this regard.

As shown in fig. 8, in some embodiments, the auxiliary contact assembly 16 further includes a first auxiliary stationary contact 164 mated with the first auxiliary moving contact 162 and a second auxiliary stationary contact 165 mated with the second auxiliary moving contact 163. The first auxiliary fixed contact 164 and the second auxiliary fixed contact 165 are inserted into the arc extinguishing case 21. In the case where the first auxiliary fixed contact 164 is connected to the first auxiliary moving contact 162, the second auxiliary fixed contact 165 is disconnected from the second auxiliary moving contact 163. In contrast, in the case where the first auxiliary fixed contact 164 is disconnected from the first auxiliary moving contact 162, the second auxiliary fixed contact 165 is connected to the second auxiliary moving contact 163.

In some embodiments, the auxiliary contact assembly 16 can be detachably connected to an end of the movable bracket 12 facing the arc extinguishing housing 21. In this way, it is advantageous to remove the auxiliary contact assembly 16 and the arc extinguishing housing 21 as a whole, simplifying the removal step, in case it is necessary to remove the fusion welding of the contact positions of the active contact 13 and the main stationary contact 14. In other embodiments, the auxiliary contact assembly 16 may be fixedly attached to the movable bracket 12 or integrally formed with the movable bracket 12, as embodiments of the present disclosure are not limited in this regard.

As shown in fig. 5-7, in some embodiments, a catch 122 is provided at an end of the movable bracket 12 facing the arc extinguishing housing 21 for snapping to the auxiliary contact assembly 16. To effect connection of the catch 122 with the auxiliary contact assembly 16, a catch hole 1612 corresponding to the catch 122 may be provided on the auxiliary moving contact holder 161, as will be more clearly shown in fig. 11. The clip 122 can be snapped into the clip aperture 1612, connecting the auxiliary contact assembly 16 to the end of the movable bracket 12 that faces the arc extinguishing housing 21.

It should be noted that, since the stiffness coefficient of the auxiliary spring 166 is smaller, the reaction force provided when the auxiliary spring 166 is compressed is also smaller, and thus the clip 122 will not disengage from the clip hole 1612 in the case where the auxiliary spring 166 transmits the force to the movable bracket 12 through the auxiliary moving contact bracket 161.

As shown in fig. 4 and 11, the arc extinguishing case 21 is provided with an opening 211 for exposing the latch hole 1612. In the case where the auxiliary moving contact holder 161 needs to be removed from the movable holder 12, the separation of the auxiliary moving contact holder 161 from the movable holder 12 can be achieved by pressing the snap piece 122 through the opening 211 and the snap hole 1612 in order.

As shown in connection with fig. 5, 7 and 11, in some embodiments, the end of the movable bracket 12 facing the arc extinguishing housing 21 is also provided with a guide 125. Accordingly, the auxiliary moving contact holder 161 is provided with a guide groove 1613 corresponding to the guide 125. The guide 125 is inserted into the guide slot 1613. The guide slot 1613 can act as a guide in connecting the auxiliary contact assembly 16 to the movable bracket 12 for facilitating assembly of the movable bracket 12 with the auxiliary movable contact bracket 161.

In assembling the auxiliary contact assembly 16, the first auxiliary moving contact 162, the second auxiliary moving contact 163, and the corresponding auxiliary spring 166 may be first disposed in the second mounting groove 1611 of the auxiliary moving contact holder 161; the auxiliary contact holder 161 is then connected to the movable holder 12; the auxiliary contact holder 161 is then inserted into the arc extinguishing housing 21; finally, the first auxiliary fixed contact 164 and the second auxiliary fixed contact 165 are installed.

By utilizing the mounting steps, on one hand, the mounting mode and sequence of the existing production line are not affected, and the mounting of tiny parts is facilitated. On the other hand, by installing the first auxiliary fixed contact 164 and the second auxiliary fixed contact 165 after the auxiliary contact holder 161 is inserted into the arc extinguishing housing 21, it is not necessary to provide a notch on the arc extinguishing housing 21 for facilitating the passage of the first auxiliary fixed contact 164 and the second auxiliary fixed contact 165, and thus continuity and integrity of the arc extinguishing housing 21 can be ensured.

Returning to fig. 4 and 5, in some embodiments, the electromagnetic assembly 3 is disposed at an end of the switching assembly 1 remote from the arc extinguishing assembly 2. The electromagnetic assembly 3 is arranged to drive the movable support 12 towards the electromagnetic assembly 3 upon energization. The electromagnetic assembly 3 includes a coil 31 and a first core 32 surrounded by the coil 31. The end of the movable bracket 12 near the electromagnetic assembly 3 is provided with a second iron core 123 corresponding to the first iron core 32. With the coil 31 energized, the first iron core 32 located inside the coil 31 has magnetism, so that the first iron core 32 attracts the second iron core 123 by magnetic attraction, thereby moving the movable bracket 12 toward the electromagnetic assembly 3. In this way, the active contact 13 and the main stationary contact 14 can be connected. The reset member may be disposed between the second core 123 and the electromagnetic assembly 3. With the coil 31 energized, the movable carriage 12 moves towards the electromagnetic assembly 3, so that the return element is compressed, thereby connecting the active contact 13 and the main stationary contact 14. When the coil 31 is not electrified, the reset piece is restored to the original state and drives the movable support 12 to move away from the electromagnetic assembly 3 so as to separate the active contact 13 from the main fixed contact 14.

Returning to fig. 8, in some embodiments, the arc extinguishing assembly 2 further includes a first conductive member 22 and a second conductive member 23. The first conductive member 22 sequentially passes through the arc extinguishing case 21 and the switching assembly 1 and is connected to one end of the coil 31. The second conductive member 23 sequentially passes through the arc extinguishing case 21 and the switching assembly 1 and is connected with the other end of the coil 31.

Returning to fig. 3 and 4, in some embodiments, a face cover 4 is provided at an end of the arc extinguishing assembly 2 remote from the switch assembly 1 for partially covering the arc extinguishing assembly 2.

As shown in fig. 7 to 9, the assembly process of the contactor 100 includes: as shown in fig. 7, the auxiliary moving contact bracket 161 is connected with the movable bracket 12 on the basis that the electromagnetic assembly 3 and the partial switch assembly 1 have been mounted. As shown in fig. 8, the installation screw 24 is tightened to connect the arc extinguishing assembly 2 with the switch assembly 1, and the first auxiliary fixed contact 164, the second auxiliary fixed contact 165, the first conductive member 22, and the second conductive member 23 are installed. Finally, as shown in fig. 9, the surface cover 4 is mounted.

Fig. 10-12 illustrate a release process of fusion welding of a contactor according to some embodiments of the present disclosure. As shown in fig. 10, the face cover 4 is removed and the mounting screw 24 is unscrewed. As shown in fig. 11, the opening 211 and the fastening hole 1612 press the fastening piece 122, thereby achieving separation of the auxiliary moving contact holder 161 and the movable holder 12. As shown in fig. 12, the arc extinguishing assembly 2 and the auxiliary contact assembly 16 are removed, and fusion welding at the contact position of the active contact 13 and the main stationary contact 14 is released by a screwdriver.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A contactor (100), characterized in that the contactor (100) comprises:

the switch assembly (1) comprises a switch shell (11), a movable support (12), a plurality of active contacts (13), a plurality of main fixed contacts (14) and a reset piece, wherein the movable support (12) is slidably arranged in the switch shell (11) in a penetrating manner, the plurality of main fixed contacts (14) are arranged on the switch shell (11), the plurality of active contacts (13) are arranged on the movable support (12) and are arranged corresponding to the plurality of main fixed contacts (14), and the reset piece is used for resetting the movable support (12) relative to the switch shell (11);

an arc extinguishing assembly (2) comprising an arc extinguishing housing (21), the arc extinguishing housing (21) being detachably connected with the switch housing (11), wherein the movable support (12), the plurality of active contacts (13) and the plurality of main stationary contacts (14) are covered by the arc extinguishing housing (21) with the arc extinguishing housing (21) connected with the switch housing (11), and the movable support (12), the plurality of active contacts (13) and the plurality of main stationary contacts (14) are not covered by the arc extinguishing housing (21) with the arc extinguishing housing (21) separated from the switch housing (11); and

-an electromagnetic assembly (3) arranged to drive said movable support (12) towards said electromagnetic assembly (3) upon energization.

2. The contactor (100) according to claim 1, wherein the switch assembly (1) further comprises a plurality of main springs (15) corresponding to the plurality of active contacts (13), respectively, the movable support (12) is provided with a plurality of first mounting slots (121), the active contacts (13) and the respective main springs (15) are arranged in the respective first mounting slots (121), and the main springs (15) are connected to a side of the respective active contacts (13) facing away from the respective main stationary contacts (14).

3. The contactor (100) according to claim 1, characterized in that the switch assembly (1) further comprises an auxiliary contact assembly (16), the auxiliary contact assembly (16) being arranged in the arc extinguishing housing (21) and being detachably connectable to an end of the movable support (12) facing the arc extinguishing housing (21).

4. A contactor (100) according to claim 3, characterized in that the end of the movable support (12) facing the arc extinguishing housing (21) is provided with a snap (122), the auxiliary contact assembly (16) comprises an auxiliary moving contact support (161) slidably connected to the arc extinguishing housing (21), the auxiliary moving contact support (161) is provided with a snap hole (1612) corresponding to the snap (122), and the snap (122) is snapped to the snap hole (1612).

5. The contactor (100) according to claim 4, wherein the end of the movable support (12) facing the arc extinguishing housing (21) is further provided with a guide member (125), the auxiliary moving contact support (161) is provided with a guide groove (1613) corresponding to the guide member (125), and the guide member (125) is inserted into the guide groove (1613).

6. The contactor (100) according to claim 4, wherein the arc extinguishing housing (21) is provided with an opening (211) for exposing the snap hole (1612).

7. The contactor (100) of claim 4, the auxiliary contact assembly (16) further comprising a first auxiliary moving contact (162), a second auxiliary moving contact (163) and an auxiliary spring (166) corresponding to the first auxiliary moving contact (162) and the second auxiliary moving contact (163), wherein two second mounting slots (1611) are formed in the auxiliary moving contact bracket (161), the first auxiliary moving contact (162) and the corresponding auxiliary spring (166) are disposed in one of the second mounting slots (1611), and the second auxiliary moving contact (163) and the corresponding auxiliary spring (166) are disposed in the other of the second mounting slots (1611).

8. The contactor (100) according to claim 7, wherein the auxiliary contact assembly (16) further comprises a first auxiliary stationary contact (164) mated with the first auxiliary moving contact (162) and a second auxiliary stationary contact (165) mated with the second auxiliary moving contact (163), the first auxiliary stationary contact (164) and the second auxiliary stationary contact (165) being inserted into the arc extinguishing housing (21).

9. The contactor (100) according to claim 1, characterized in that the electromagnetic assembly (3) comprises a coil (31) and a first core (32) surrounded by the coil (31), the end of the movable support (12) close to the electromagnetic assembly (3) being provided with a second core (123) corresponding to the first core.

10. The contactor (100) according to claim 9, wherein the arc extinguishing assembly (2) further comprises a first conductive member (22) and a second conductive member (23), the first conductive member (22) passing through the arc extinguishing housing (21) and the switching assembly (1) and being connected to one end of the coil (31), the second conductive member (23) passing through the arc extinguishing housing (21) and the switching assembly (1) and being connected to the other end of the coil (31).