Vacuum AC contactor

Abstract

The utility model relates to the technical field of low-voltage electric appliances, and discloses a vacuum alternating current contactor. The vacuum alternating current contactor comprises a shell assembly with a containing cavity, and the containing cavity is further internally provided with a vacuum tube connected with the shell assembly; the contact mechanism comprises a static contact assembly and a moving contact assembly, one end of the static contact assembly is connected with the first terminal assembly, the other end of the static contact assembly extends into the vacuum tube, one end of the moving contact assembly is connected with the second terminal assembly, the other end of the moving contact assembly extends into the vacuum tube and is arranged opposite to the static contact assembly, and the moving contact assembly comprises an adjustable screw. The adjustable screw rod is used for adjusting the opening distance between the moving contact assembly and the static contact assembly. The shell assembly comprises a shell and a dismounting part, an adjusting opening is formed in the shell, the adjusting opening and the adjustable screw rod are oppositely arranged, and the dismounting part can block the adjusting opening. According to the vacuum AC contactor of the utility model, the adjustment of the adjustable screw rod can be realized conveniently, and other parts in the vacuum AC contactor are not easy to damage.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a vacuum AC contactor. Background Art

[0002] Vacuum AC contactors are suitable for harsh occasions such as high voltage, high current, frequent disconnection, high humidity, dielectric pollution, etc., and have the advantages of fast disconnection, good durability, and small size, and are deeply loved by industry customers. The vacuum AC contactor includes a contact system, an electromagnetic system, and a vacuum tube, wherein the contact system includes a moving contact assembly and a static contact assembly, one end of the static contact assembly is used to connect to the first terminal, and the other end extends into the vacuum tube, one end of the moving contact assembly is connected to the second terminal, and the other end extends into the vacuum tube and is opposite to the static contact assembly. The output end of the electromagnetic system can drive the moving contact assembly to move so that the moving contact assembly abuts or disconnects with the static contact assembly. The vacuum tube can quickly extinguish the arc generated when the static contact assembly and the moving contact assembly are connected or disconnected.

[0003] The vacuum tube of the vacuum AC contactor maintains a high vacuum state inside. In this state, the arc between the moving and static contacts is formed by metal vapor ions. The diffusion and recombination process of metal vapor ions is very rapid, which enables the vacuum tube to quickly extinguish the arc and quickly restore the original vacuum degree. Therefore, the opening distance and stroke of the vacuum contactor are much smaller than those of traditional contactors. This leads to errors in parts manufacturing, structural matching errors, or errors in assembly process, which may affect its stroke. For this reason, an adjustable screw is usually provided at the vacuum tube of the vacuum contactor. The adjustable screw is used to adjust the position of the moving contact relative to the static contact, thereby ensuring the consistency of the three-phase contacts of the contactor.

[0004] The existing vacuum AC contactor needs to disassemble the shell as a whole before adjusting the adjustable screw. In the process of disassembling the shell as a whole, it is easy to cause damage to the internal parts, affecting the normal use of the vacuum AC contactor.

[0005] Therefore, a vacuum AC contactor is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0006] The utility model aims to provide a vacuum AC contactor, which is convenient for adjusting an adjustable screw rod and is not prone to damaging other components.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A vacuum AC contactor comprises a housing component having a receiving cavity, wherein the receiving cavity is further provided with:

[0009] A vacuum tube connected to the housing assembly;

[0010] The contact mechanism comprises a stationary contact assembly and a moving contact assembly, wherein one end of the stationary contact assembly is connected to the first terminal assembly and the other end thereof extends into the vacuum tube, and one end of the moving contact assembly is connected to the second terminal assembly and the other end thereof extends into the vacuum tube and is arranged opposite to the stationary contact assembly, and the moving contact assembly comprises an adjustable screw, and the adjustable screw is used to adjust the opening distance between the moving contact assembly and the stationary contact assembly;

[0011] The housing assembly comprises a shell and a disassembly piece. The shell is provided with an adjustment opening, the adjustment opening is arranged opposite to the adjustable screw, and the disassembly piece can block the adjustment opening.

[0012] As an optional solution, at the adjustment opening, the housing has a first end surface perpendicular to the first direction, and an embracing structure is provided on the first end surface, and the embracing structure is surrounded to form a slot;

[0013] The disassembly member includes a main body blocking portion and a connection structure, the main body blocking portion blocks the adjustment opening, and the connection structure can be plugged into the slot along a first direction.

[0014] As an optional solution, the connecting structure is convexly arranged on a side of the main body blocking portion facing the accommodating cavity;

[0015] Along the second direction, the first end face forms an escape zone between the embracing structure and the outer surface of the shell, the surface of the main body blocking part facing the first end face abuts against the escape zone, and the surface of the main body blocking part perpendicular to the second direction abuts against the embracing structure.

[0016] As an optional solution, a side of the embracing structure facing the main body blocking portion is provided with an avoidance hole, and the avoidance hole is used to avoid the connecting structure, and the connecting structure includes:

[0017] A main body connecting portion, on which a first mounting hole extending along the first direction is formed, a fastener is installed in the first mounting hole, and the fastener can lock the disassembly member and the housing;

[0018] The limiting portion is connected to the outer periphery of the main body connecting portion, and the embracing structure forms stop walls on both sides of the avoidance hole. Along the second direction, the limiting portion abuts against the stop walls.

[0019] As an optional solution, a sinking groove is provided on the surface of the main body blocking portion which is perpendicular to the first direction and away from the first end surface;

[0020] The second terminal assembly includes a flexible connector and a second terminal. One end of the flexible connector is connected to the adjustable screw and the other end is overlapped in the sinking groove. The second terminal passes through the flexible connector and is connected to the sinking groove.

[0021] As an optional solution, the sink portion is provided with an embedding hole, a nut is embedded in the embedding hole, and the second terminal is threadedly connected to the nut.

[0022] As an optional solution, a mounting groove is provided on the side wall of the shell opposite to the adjustment opening and penetrates the shell along the second direction;

[0023] The first terminal assembly includes a terminal board, a connecting plate, a connecting piece and a first terminal, the terminal board includes a first connecting portion and a second connecting portion, the first connecting portion abuts against the static contact assembly and is inserted into the mounting groove, the second connecting portion extends out of the accommodating cavity, the first terminal is connected to the second connecting portion, the connecting plate abuts against the outer side of the shell, and the connecting piece passes through the connecting plate and the first connecting portion in sequence and is connected to the static contact assembly.

[0024] As an optional solution, a stop rib is provided on the side wall of the installation groove, and the first connecting portion abuts against the stop rib; and / or

[0025] The mounting groove extends toward one end of the first connecting portion and penetrates to an end surface of the housing.

[0026] As an optional solution, the connecting plate includes an abutting protrusion and two stoppers respectively connected to the abutting protrusions;

[0027] A stop groove is provided on the outer side of the shell at the outer periphery of the mounting groove, the stop portion is limited in the stop groove, the abutting protrusion is inserted into the mounting groove and abuts against the terminal board, and the connecting member passes through the abutting protrusion.

[0028] As an optional solution, the first connecting portion and the second connecting portion are arranged at an angle, wherein:

[0029] A side of the abutting protrusion facing the second connecting portion is provided with an avoidance groove; and / or

[0030] The second connecting portion abuts against a side of the stopping portion facing the second connecting portion.

[0031] As an optional scheme, the shell includes a bottom plate, a base and a top plate, the base includes a cylindrical enclosure and a partition arranged in the enclosure, a first accommodating cavity is formed between the top plate and the partition, the vacuum tube is arranged in the first accommodating cavity, and the adjustment opening is arranged on the enclosure.

[0032] As an optional solution, the partition is provided with supporting ribs, and the vacuum tube is supported on the supporting ribs; and / or

[0033] A buffer is arranged between the vacuum tube and the partition.

[0034] As an optional solution, the vacuum AC contactor also includes:

[0035] Electromagnetic systems;

[0036] The contact support is pivotally connected to the housing, one end of the contact support is connected to the output end of the electromagnetic system, and the other end is connected to the moving contact assembly. The electromagnetic system can drive the contact support to rotate around its pivot axis to connect or disconnect the moving contact assembly with the static contact assembly.

[0037] As an optional scheme, a visual window is provided on the shell, and a first marking member and a second marking member are provided on the contact support. When the moving contact assembly is connected with the static contact assembly, the first marking member is opposite to the visual window, and when the moving contact assembly is disconnected with the static contact assembly, the second marking member is opposite to the visual window.

[0038] As an optional solution, a carrying hand groove is provided on the shell, and an anti-slip rib is provided on the carrying hand groove near the outer surface of the shell.

[0039] As an optional solution, the shell includes a bottom plate, a base and a top plate, the base is constructed in a cylindrical shape, the bottom plate and the top plate are respectively connected to the two ends of the base, the adjustment opening includes three through holes, each of the through holes corresponds to one of the adjustable screws; the disassembly part is a sealing plate, and the sealing plate seals the through hole.

[0040] The beneficial effects of the utility model are:

[0041] The vacuum AC contactor of the utility model is provided with an opening on the housing at a position opposite to the housing screw, and a detachable part is installed at the sealing opening. When the adjustable screw does not need to be adjusted, the detachable part can ensure good sealing of the vacuum AC contactor; when the adjustable screw needs to be adjusted, the detachable part is only removed from the housing, and the adjustable screw is directly opposite to the sealing opening at this time, and the operator can easily adjust the adjustable screw through the adjustment opening without affecting other parts, and the operation is convenient and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the vacuum AC contactor provided in the first embodiment of the utility model at a viewing angle;

[0043] Figure 2 This is a schematic diagram of the internal structure of the vacuum AC contactor provided in the first embodiment of the utility model;

[0044] Figure 3 This is a schematic diagram of the structure of the base and the disassembly member provided in the first embodiment of the utility model in the matching state;

[0045] Figure 4 It is a partial cross-sectional view of the matching position of the vacuum tube and the base provided in the first embodiment of the utility model;

[0046] Figure 5 It is a partial cross-sectional view of the base provided in the first embodiment of the utility model in cooperation with the vacuum tube;

[0047] Figure 6 It is a partial cross-sectional view of the contact support provided by the first embodiment of the utility model;

[0048] Figure 7 It is a partial structural schematic diagram of the vacuum AC contactor provided in the first embodiment of the utility model;

[0049] Figure 8 It is a schematic diagram of the structure of the disassembly member provided in the first embodiment of the utility model at a viewing angle;

[0050] Fig. 9 It is a partial structural diagram of the matching position between the base and the disassembly member provided in the first embodiment of the utility model;

[0051] Fig.10 It is a schematic structural diagram of the disassembly component provided in the first embodiment of the utility model from another perspective;

[0052] Fig.11 It is a schematic structural diagram of the vacuum AC contactor provided in the first embodiment of the utility model from another perspective;

[0053] Fig.12 This is a schematic diagram of the structure of the vacuum AC contactor provided in the first embodiment of the utility model at the first terminal assembly;

[0054] Fig.13 This is a partial exploded view of the vacuum AC contactor provided in the first embodiment of the utility model;

[0055] Fig.14 It is a partial cross-sectional view of the first terminal assembly provided in the first embodiment of the utility model;

[0056] Fig.15 It is a structural schematic diagram of the connecting plate provided in the first embodiment of the utility model;

[0057] Fig.16 It is a structural schematic diagram of a vacuum AC contactor provided in Embodiment 2 of the present utility model.

[0058] In the figure:

[0059] 10. Shell assembly; 11. Shell; 110. Adjustment opening; 111. Base; 1111. Enclosure; 1112. Partition; 11121. Support rib; 1113. First end face; 1114. Surrounding structure; 1115. Slot; 1116. Avoidance area; 1117. Avoidance hole; 1118. Stop wall; 11110. Installation groove; 11111. Stop rib; 11112. Stop groove; 11113. Through hole; 11114, carrying hand slot; 11115, anti-slip rib; 11116, concave structure; 112, bottom plate; 113, top plate; 1131, visual window; 114, nut; 12, disassembly part; 121, main body blocking part; 1211, sinking groove part; 1212, embedded hole; 122, connecting structure; 1221, main body connecting part; 1222, first mounting hole; 1223, limiting part; 123, fastener;

[0060] 20. Vacuum tube;

[0061] 31. Stationary contact assembly; 32. Moving contact assembly; 321. Adjustable screw; 322. Elastic member; 323. First nut; 324. Second nut;

[0062] 41. first terminal assembly; 411. terminal board; 4111. first connection portion; 4112. second connection portion; 412. connection piece; 413. connection plate; 4131. abutting protrusion; 4132. stopper; 4133. avoidance groove; 414. first terminal; 42. second terminal assembly; 421. flexible connection piece; 422. second terminal;

[0063] 50. Electromagnetic system; 51. Coil; 52. Armature;

[0064] 61. Contact support; 611. First marking member; 612. Second marking member; 613. Through hole; 62. Pivot; 63. Bushing; 64. Mounting seat. DETAILED DESCRIPTION

[0065] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0066] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0068] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0069] Embodiment 1

[0070] This embodiment provides a vacuum AC contactor, such as Figure 1-Figure 3 , Fig.14As shown, the vacuum AC contactor includes a housing assembly 10, a vacuum tube 20, a contact mechanism, an electromagnetic system 50, a contact support 61, a first terminal assembly 41 and a second terminal assembly 42. The housing assembly 10 is surrounded to form a receiving cavity, and the vacuum tube 20, the contact mechanism, the contact support 61 and the electromagnetic system 50 are all arranged in the receiving cavity. The contact mechanism, the vacuum tube 20, the first terminal assembly 41 and the second terminal assembly 42 are each correspondingly arranged in three groups. The first terminal assembly 41 is at least partially located outside the housing assembly 10, and the second terminal assembly 42 is at least partially located outside the housing assembly 10, so as to be connected to the external main circuit. The contact mechanism includes a static contact assembly 31 and a moving contact assembly 32, and one end of the static contact assembly 31 is connected to the first terminal assembly 41, and the other end extends into the vacuum tube 20. One end of the moving contact assembly 32 is connected to the second terminal assembly 42, and the other end extends into the vacuum tube 20. The stationary contact assembly 31 and the moving contact assembly 32 located in the vacuum tube 20 are arranged opposite to each other, and the moving contact assembly 32 can move relative to the vacuum tube 20 to connect or disconnect with the stationary contact assembly 31, thereby realizing the connection and disconnection of the main circuit. The vacuum tube 20 can quickly extinguish the arc generated by the connection and disconnection process of the moving contact assembly 32 and the stationary contact assembly 31. On the basis of not violating the concept of the utility model of the present application, the vacuum tube 20 can be any existing one, and the general structure and arc extinguishing principle of the vacuum tube 20 will not be repeated here. The electromagnetic system 50 includes a coil 51 and an armature 52, and the two ends of the coil 51 are used to connect with the external control circuit, and the moving contact assembly 32 is connected to the armature 52 through the contact support 61. The general working principle of the vacuum AC contactor is: when the control circuit is powered on, the coil 51 is energized and drives the armature 52 to move. The armature 52 drives the three moving contact assemblies 32 to move close to the corresponding static contact assemblies 31 through the contact support 61 and connects with the static contact assemblies 31, thereby realizing the conduction of the main circuit.

[0071] like Figure 3 As shown, the housing assembly 10 includes a shell 11, and the shell 11 includes a bottom plate 112, a base 111 and a top plate 113, wherein the base 111 includes a cylindrical enclosure 1111 and a partition 1112 arranged in the enclosure 1111, and the enclosure 1111 is provided with openings at both ends along the first direction, and the top plate 113 and the bottom plate 112 are respectively connected to the two ends of the base 111. The four sides of the cylindrical base 111 are integrally formed, with stronger support and a more solid structure. A first accommodating cavity is formed between the base 111 and the partition 1112, and the three vacuum tubes 20 are all arranged in the first accommodating cavity. The first terminal assembly 41 and the second terminal assembly 42 are both connected to one end of the base 111 close to the top plate 113. In this embodiment, the first terminal assembly 41 and the second terminal assembly 42 are respectively installed on the side walls of the enclosure 1111 arranged opposite to each other along the second direction, and the second direction is arranged perpendicular to the first direction.

[0072] In this embodiment, Figure 3 As shown, the surface of the partition 1112 facing the first accommodation chamber is formed with three arc areas, and each vacuum tube 20 is limited to a circular arc area. Figure 4 and Figure 5 As shown, the partition 1112 is provided with supporting ribs 11121 in each arc area, and the vacuum tube 20 is supported on the supporting ribs 11121. The provision of the supporting ribs 11121 can not only increase the strength of the partition 1112, thereby improving the overall strength of the vacuum AC contactor, but also can well limit the corresponding vacuum tube 20. In this embodiment, each arc area is provided with two supporting ribs 11121 along the length direction of the vacuum tube 20. In other embodiments, the specific number of supporting ribs 11121 in each arc area can be flexibly set, and no specific limitation is made here. In some embodiments, a buffer is provided between the vacuum tube 20 and the partition 1112, so as to protect the vacuum tube 20 and prevent the vacuum tube 20 from being damaged during large impact vibration. In this embodiment, the buffer is provided between the two supporting ribs 11121. Optionally, the buffer can be a rubber pad, a sponge pad, etc., which is not specifically limited here.

[0073] like Figure 1 and Figure 5 As shown, a carrying hand groove 11114 is provided on the housing 11, and the carrying hand groove 11114 is used for the user's hand to reach in to grab the vacuum AC contactor, thereby improving the convenience of carrying. Specifically, the carrying hand groove 11114 is provided on the base 111. In this embodiment, two carrying hand grooves 11114 are provided, and the two carrying hand grooves 11114 are provided on two side walls of the base 111 that are arranged opposite to each other along the third direction. Anti-slip ribs 11115 are provided on the groove wall of the carrying hand groove 11114 near the outer surface of the housing 11. The provision of the anti-slip ribs 11115 forms an inner concave structure 11116 on the groove wall of the carrying hand groove 11114, and the inner concave structure 11116 can accommodate the user's fingers, thereby improving the anti-slip effect. In this embodiment, the carrying hand groove 11114 extends all the way to the bottom plate 112 along the first direction, which not only reduces the difficulty of molding, but also does not further form an opening on the base 111, thereby ensuring the sealing of the vacuum AC contactor.

[0074] like Figure 2 and Figure 3As shown, a second accommodating chamber is formed between the bottom plate 112 and the partition 1112, and the electromagnetic system 50 is arranged in the second accommodating chamber. A gap is provided between the partition 1112 and the surrounding plate 1111, so that the first accommodating chamber and the second accommodating chamber are connected, and a part of the contact support 61 is located in the first accommodating chamber to facilitate connection with the moving contact assembly 32, and the other part of the contact support 61 extends into the second accommodating chamber through the above-mentioned gap to connect with the electromagnetic system 50. In this embodiment, the contact support 61 is pivotally connected to the housing 11, and the pivot axis extends along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. It should be noted that the three contact mechanisms, the three vacuum tubes 20, the three first terminal assemblies 41, and the three second terminal assemblies 42 are respectively arranged along the third direction. Specifically, as Figure 2 and Figure 6 As shown, the contact support 61 is provided with a hole extending along the third direction, and the vacuum AC contactor also includes a pivot 62, a sleeve 63 and a mounting seat 64. Two mounting seats 64 are provided and are arranged at intervals along the third direction, and the mounting seat 64 is connected to the inner wall of the base 111. The pivot 62 is penetrated by the contact support 61 and is connected with sleeves 63 at both ends. The two sleeves 63 are respectively rotatably matched with the mounting seat 64, so as to realize the pivot connection between the contact support 61 and the housing assembly 10. Optionally, the sleeve 63 can be made of thermoplastic material with excellent wear resistance to improve the rotation wear resistance. In other embodiments, bearings can be respectively connected to both ends of the pivot 62, and each bearing is fixed in a mounting seat 64.

[0075] like Figure 1 and Figure 6 As shown, a visual window 1131 is provided on the housing 11. In this embodiment, the visual window 1131 is opened on the top plate 113. A first marking member 611 and a second marking member 612 are provided on the contact support 61. When the contact support 61 rotates and the moving contact assembly 32 is connected to the static contact assembly 31, the first marking member 611 is opposite to the visual window 1131. When the contact support 61 rotates and the moving contact assembly 32 is disconnected from the static contact assembly 31, the second marking member 612 is opposite to the visual window 1131. Thus, it is convenient for the user to judge whether the current moving contact assembly 32 and the static contact assembly 31 are connected by observing the visual window 1131, that is, whether the main circuit is turned on, thereby providing a guarantee for the safety of the user. Optionally, the first marking member 611 and the second marking member 612 can be patches or cover plates of different colors, etc., which not only facilitates the user to distinguish the on and off of the contact mechanism, but also has a simple structure and is easy to achieve connection with the contact support 61.

[0076] Since a high vacuum state is maintained inside the vacuum tube 20, the arc between the moving and static contacts in this state is formed by metal vapor ions, and the diffusion and recombination process of the metal vapor ions is very rapid, which enables the vacuum tube 20 to quickly extinguish the arc and quickly restore the original vacuum degree. Therefore, the opening distance and stroke of the vacuum contactor are much smaller than those of traditional contactors. This may cause errors in parts manufacturing, structural matching errors or assembly process errors, which may affect its stroke.

[0077] In this regard, in this embodiment, the moving contact assembly 32 includes an adjustable screw 321, and the adjustable screw 321 is used to adjust the distance between the moving contact assembly 32 and the stationary contact assembly 31, so as to ensure the consistency of the three-phase contact mechanism of the vacuum AC contactor. In this embodiment, the distance between the moving contact assembly 32 and the stationary contact assembly 31 can be adjusted by rotating the adjustable screw 321. Specifically, Figure 2 and Figure 6 As shown, a through hole 613 is provided on the contact support 61, and the moving contact assembly 32 includes a moving contact rod (blocked in the figure), an elastic member 322, a first nut 323 and a second nut 324. One end of the moving contact rod is located outside the vacuum tube 20, and the other end extends into the vacuum tube 20. One end of the adjustable screw 321 passes through the through hole 613 on the contact support 61 and is connected to the part of the moving contact rod located outside the vacuum tube 20. The first nut 323 and the second nut 324 are both threadedly connected to the adjustable screw 321, and the first nut 323 is located on the side of the contact support 61 facing the vacuum tube 20 and abuts against the vacuum tube 20, and the second nut 324 is located on the side of the contact support 61 away from the vacuum tube 20, and the elastic member 322 elastically presses between the first nut 323 and the contact support 61. At this time, when the electromagnetic system 50 is not in operation, the position of the contact support 61 remains stationary, and when the adjustable screw 321 is rotated, the adjustable screw 321 and the moving contact assembly 32 move together in the axial direction relative to the contact support 61 and the vacuum tube 20, that is, relative to the stationary contact assembly 31, thereby achieving the adjustment of the distance between the moving contact assembly 32 and the stationary contact assembly 31. Of course, in other embodiments, the specific structure of the moving contact assembly 32 and the stationary contact assembly 31 for achieving the distance adjustment through the adjustable screw 321 is not limited.

[0078] In this embodiment, Figure 2 As shown, the second terminal assembly 42 includes a soft connector 421 and a second terminal 422, wherein one end of the soft connector 421 is sleeved on the adjustable screw 321 and clamped between the end surface of the moving contact rod and the first nut 323, and the other end of the soft connector 421 extends to the outside of the housing assembly 10 and is connected to the second terminal 422, and the second terminal 422 is used to connect to the main circuit. Optionally, the soft connector 421 can be a metal spring.

[0079] The existing vacuum AC contactor needs to disassemble the shell part before adjusting the adjustable screw 321. In the process of disassembling the shell part, it is easy to cause damage to the internal parts, affecting the normal use of the vacuum AC contactor.

[0080] In this regard, Figure 1 , Figure 7 and Figure 8 As shown, the shell 11 is provided with an adjustment opening 110, and the adjustment opening 110 is arranged opposite to the adjustable screw 321. The shell assembly 10 also includes a disassembly part 12, and the disassembly part 12 can block the adjustment opening 110. Therefore, when the adjustable screw 321 does not need to be adjusted, the disassembly part 12 can ensure the good sealing of the vacuum AC contactor; when the adjustable screw 321 needs to be adjusted, only the disassembly part 12 is removed from the shell 11. At this time, the adjustable screw is opposite to the blocking opening, and the operator can easily adjust the adjustable screw 321 through the adjustment opening 110 without affecting other parts. The operation is convenient and safe. In this embodiment, the adjustment opening 110 is arranged on the enclosure 1111 of the base 111, and is located at one end of the enclosure 1111 close to the top plate 113.

[0081] like Figure 7-10 As shown, at the adjustment opening 110, the housing 11 has a first end face 1113 perpendicular to the first direction, and an embracing structure 1114 is provided on the first end face 1113. The embracing structure 1114 surrounds a slot 1115 extending along the first direction to form a depth. The disassembly member 12 includes a main body blocking portion 121 and a connecting structure 122. The connecting structure 122 can be plugged into the slot 1115 along the first direction, and the main body blocking portion 121 blocks the adjustment opening 110. Through the cooperation of the slot 1115 and the embracing structure 1114, the installation and positioning of the disassembly member 12 can be preliminarily achieved, thereby ensuring that the disassembly member 12 is accurately matched with the housing 11. In this embodiment, the first end face 1113 and the embracing structure 1114 are both provided on the base 111. In this embodiment, two embracing structures 1114 are provided on the first end surface 1113, and correspondingly, two connecting structures 122 are provided on the disassembly member 12, and each connecting structure 122 is plugged and matched with a slot 1115 of the embracing structure 1114. It should be noted that, Figure 7 The soft connection member 421 is a flexible member, so when the disassembly member 12 is installed along the first direction, it can be moved to avoid it.

[0082] Preferably, if Fig.10 As shown, the connection structure 122 is convexly disposed on the side of the main body blocking portion 121 facing the accommodating cavity. Figure 7As shown, along the second direction, the first end face 1113 forms an escape zone 1116 between the embracing structure 1114 and the outer surface of the shell 11, the surface of the main body blocking portion 121 facing the first end face 1113 abuts against the escape zone 1116, and the surface of the main body blocking portion 121 perpendicular to the second direction abuts against the embracing structure 1114. Through the abutment and cooperation of the above two groups of surfaces, not only can the disassembly part 12 and the shell 11 be closely matched to improve the sealing performance, but also the outer surface of the disassembly part 12 can be flush with the outer surface of the shell 11, thereby improving the aesthetics of the vacuum AC circuit breaker. In this embodiment, the embracing structure 1114 is provided with an escape hole 1117 on one side facing the main body blocking portion 121, and the escape hole 1117 is used to avoid the connection structure 122 to ensure that the disassembly part 12 can be smoothly installed on the shell 11.

[0083] like Fig. 9 and Fig.10 As shown, the connection structure 122 includes a main body connection part 1221 and two limiting parts 1223. Among them, the main body connection part 1221 is provided with a first mounting hole 1222 extending along the first direction, and a fastener 123 is installed in the first mounting hole 1222. The fastener 123 can lock the disassembly part 12 and the housing 11. The disassembly part 12 can be locked on the housing 11 by the fastener 123 to ensure the reliability of the connection of the disassembly part 12. In this embodiment, the fastener 123 is a screw, and a matching hole is provided on the first end face 1113 corresponding to the first mounting hole 1222. The screw is inserted into the matching hole after passing through the first mounting hole 1222, so that the disassembly part 12 is connected to the housing 11. Two limiting parts 1223 are provided and are respectively connected to the outer periphery of the main body connection part 1221, and the embracing structure 1114 forms stop walls 1118 on both sides of the avoidance hole 1117, respectively. Along the second direction, the limiting parts 1223 abut against the stop walls 1118. Through the abutment between the inner surface of the stop wall 1118 and the limiting portion 1223, and the abutment between the main body sealing portion 121 and the outer surface of the stop wall 1118, the installation of the disassembly part 12 can be further limited to ensure the matching accuracy between the disassembly part 12 and the shell 11, and to ensure that the first installation hole 1222 is aligned with the corresponding matching hole, thereby ensuring that the fastener 123 can be installed smoothly.

[0084] like Figure 8 and Fig.10As shown, a sinking groove 1211 is provided on the surface of the main body blocking portion 121 perpendicular to the first direction and away from the first end face 1113, and three sinking grooves 1211 are provided. The soft connector 421 of each second terminal assembly 42 is overlapped in the sinking groove 1211, and the second terminal 422 passes through the soft connector 421 and is connected to the sinking groove 1211. The second terminal 422 can lock the soft connector 421 with the disassembly member 12, thereby further improving the tightness of the disassembly member 12 and the entire vacuum AC contactor. Optionally, a V-shaped groove can be provided at the physical structure between two adjacent sinking grooves, and the V-shaped groove can increase the creepage distance between the terminals of adjacent phases and improve the safety of the vacuum AC contactor. In this embodiment, an embedding hole 1212 is provided on the sinking groove 1211, and a nut 114 is embedded in the embedding hole 1212, and the second terminal 422 is threadedly connected to the nut 114. The second terminal 422 is fixed by embedding the nut 114 , so that when the second terminal 422 is tightened, the disassembly member 12 will not be broken due to excessive force, thereby improving the service life of the vacuum AC contactor.

[0085] In order to achieve the connection of the first terminal assembly 41, as Figure 11-Figure 15 As shown, a mounting groove 11110 is provided on the side wall of the housing 11 opposite to the adjustment opening 110 and penetrates the housing 11 along the second direction. The first terminal assembly 41 includes a terminal board 411 , a connecting board 413 , a connecting member 412 and a first terminal 414 . The terminal board 411 includes a first connection portion 4111 and a second connection portion 4112, the first connection portion 4111 abuts against the static contact assembly 31 and is inserted into the mounting groove 11110, the second connection portion 4112 extends out of the accommodating cavity, the first terminal 414 is connected to the second connection portion 4112, the connecting plate 413 abuts against the outer side of the housing 11, and the connecting member 412 passes through the connecting plate 413 and the first connection portion 4111 in sequence and is connected to the static contact assembly 31, so that the connection between the connecting plate 413, the terminal board 411, the housing 11, and the static contact assembly 31 not only fixes the first terminal assembly 41, but also fixes the static contact assembly 31 and the vacuum tube 20, so that the structure of the entire vacuum AC contactor is simple and compact. In this embodiment, the connecting member 412 can be a bolt.

[0086] like Fig.13 As shown, the first connection portion 4111 and the second connection portion 4112 are arranged at an angle, and the mounting groove 11110 is inserted into the end surface of the housing 11 toward one end of the first connection portion 4111. Therefore, when installing the terminal board 411, the terminal board 411 can be inserted into the mounting groove 11110 along the first direction, which improves the convenience of installation. In this embodiment, the first connection portion 4111 and the second connection portion 4112 are arranged vertically.

[0087] like Fig.14As shown, a stop rib 11111 is provided on the side wall of the mounting groove 11110, and the first connecting portion 4111 abuts against the stop rib 11111. The setting of the stop rib 11111 can prevent the terminal board 411 from moving toward the outside of the housing 11 along the second direction, and also limit the vacuum tube 20 and the static contact assembly 31 in the second direction, ensuring the precise matching of the components. In this embodiment, the stop rib 11111 is provided on the two side walls of the mounting groove 11110 perpendicular to the third direction.

[0088] like Fig.14 and Fig.15 As shown, the connector 412 is constructed in a "J" shape and includes a butting protrusion 4131 and two stoppers 4132 respectively connected to the butting protrusion 4131. The butting protrusion 4131 is inserted into the installation groove 11110 and butted against the terminal board 411, so as to further limit the terminal board 411 along the second direction. The connector 412 penetrates the butting protrusion 4131 to connect with the terminal board 411 and the static contact assembly 31. The outer side of the housing 11 is provided with a stopper groove 11112 on the outer periphery of the installation groove 11110. The stopper 4132 is limited in the stopper groove 11112. The stopper groove 11112 can position the stopper 4132, improve the installation efficiency of the connecting plate 413, and ensure the limiting effect on the connecting plate 413 along the second direction.

[0089] like Fig.12 and Fig.15 As shown, a side of the abutting protrusion 4131 toward the second connection part 4112 is provided with an avoidance groove 4133, and the avoidance groove 4133 can avoid the bending part of the first connection part 4111 and the second connection part 4112, even if the bending part does not contact the connecting plate 413, thereby saving the process cost of further machining and removing the fillet after bending the terminal plate 411. Preferably, the second connection part 4112 abuts against the side of the stopper 4132 toward the second connection part 4112. At this time, the second connection part 4112 of the terminal plate 411 and the connecting plate 413 form a limiting interlocking structure in the first direction, which can prevent the second connection part 4112 from turning down and prevent the connecting plate 413 from moving up. In this embodiment, the connecting plate 413 can be a sheet metal part.

[0090] Embodiment 2

[0091] This embodiment provides a vacuum AC contactor, which has the same general structure as the vacuum AC contactor in the first embodiment, except that the structure of the adjustment opening 110 and the disassembly member 12 is as follows:

[0092] like Fig.16As shown, the shell 11 of the housing assembly 10 also includes a bottom plate 112, a base 111 and a top plate 113. The base 111 is constructed in a cylindrical shape, and the bottom plate 112 and the top plate 113 are respectively connected to the two ends of the base 111. The adjustment opening 110 includes three through holes 11113, and the three through holes 11113 are all opened on the base 111. Each through hole 11113 corresponds to an adjustable screw 321. The disassembly part 12 is a sealing sheet, and the sealing sheet seals the through hole 11113. When it is necessary to adjust the housing screw 321, the sealing sheet is removed from the through hole 11113, and after the adjustment contact, the sealing sheet is glued back. In this embodiment, the through hole 11113 is a countersunk hole, that is, a countersunk groove is formed on the side of the through hole 11113 facing the outside of the housing assembly 10, and the sealing sheet is installed in the countersunk groove, which improves the firmness of the installation of the sealing sheet and the accuracy of the installation position of the sealing sheet. The sealing sheet can be connected to the housing 11 by bonding, and has a simple structure and is easy to assemble and disassemble.

[0093] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the field, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scopes, and the content of this specification should not be understood as limiting the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. Vacuum AC contactor, characterized in that: It comprises a housing component (10) having a receiving cavity, wherein the receiving cavity is further provided with: A vacuum tube (20) connected to the housing assembly (10); A contact mechanism, comprising a stationary contact assembly (31) and a moving contact assembly (32), wherein one end of the stationary contact assembly (31) is connected to a first terminal assembly (41) and the other end extends into the vacuum tube (20), and one end of the moving contact assembly (32) is connected to a second terminal assembly (42) and the other end extends into the vacuum tube (20) and is arranged opposite to the stationary contact assembly (31), and the moving contact assembly (32) comprises an adjustable screw (321), and the adjustable screw (321) is used to adjust the opening distance between the moving contact assembly (32) and the stationary contact assembly (31); The housing assembly (10) comprises a shell (11) and a disassembly component (12); an adjustment opening (110) is provided on the shell (11); the adjustment opening (110) is arranged opposite to the adjustable screw (321); and the disassembly component (12) is capable of blocking the adjustment opening (110).

2. The vacuum AC contactor according to claim 1, characterized in that: At the adjustment opening (110), the housing (11) has a first end surface (1113) perpendicular to the first direction, an embracing structure (1114) is provided on the first end surface (1113), and the embracing structure (1114) is surrounded to form a slot (1115); The disassembly member (12) comprises a main body blocking portion (121) and a connection structure (122), wherein the main body blocking portion (121) blocks the adjustment opening (110), and the connection structure (122) can be plugged into the slot (1115) along a first direction.

3. The vacuum AC contactor according to claim 2, characterized in that: The connection structure (122) is protrudingly arranged on a side of the main body blocking portion (121) facing the accommodating cavity; Along the second direction, the first end face (1113) forms an escape zone (1116) between the embracing structure (1114) and the outer surface of the shell (11), the surface of the main body blocking portion (121) facing the first end face (1113) abuts against the escape zone (1116), and the surface of the main body blocking portion (121) perpendicular to the second direction abuts against the embracing structure (1114).

4. The vacuum AC contactor according to claim 3, characterized in that: A side of the embracing structure (1114) facing the main body blocking portion (121) is provided with an avoidance hole (1117), the avoidance hole (1117) being used to avoid the connecting structure (122), the connecting structure (122) comprising: A main body connecting portion (1221) is provided with a first mounting hole (1222) extending along the first direction, a fastener (123) is installed in the first mounting hole (1222), and the fastener (123) can lock the disassembly member (12) and the housing (11); The limiting portion (1223) is connected to the outer periphery of the main body connecting portion (1221), and the embracing structure (1114) forms a stop wall (1118) on both sides of the avoidance hole (1117). Along the second direction, the limiting portion (1223) abuts against the stop wall (1118).

5. The vacuum AC contactor according to claim 2, characterized in that: A recessed groove (1211) is provided on a surface of the main body sealing portion (121) which is perpendicular to the first direction and away from the first end surface (1113); The second terminal assembly (42) comprises a flexible connector (421) and a second terminal (422); one end of the flexible connector (421) is connected to the adjustable screw (321), and the other end is overlapped in the recessed groove (1211); the second terminal (422) passes through the flexible connector (421) and is connected to the recessed groove (1211).

6. The vacuum AC contactor according to claim 5, characterized in that: The recessed groove portion (1211) is provided with an embedding hole (1212), a nut (114) is embedded in the embedding hole (1212), and the second terminal (422) is threadedly connected to the nut (114).

7. The vacuum AC contactor according to any one of claims 1 to 6, characterized in that: A mounting groove (11110) is provided on a side wall of the housing (11) opposite to the adjustment opening (110) and penetrates the housing (11) along a second direction; The first terminal assembly (41) includes a terminal board (411), a connecting board (413), a connecting piece (412) and a first terminal (414); the terminal board (411) includes a first connecting portion (4111) and a second connecting portion (4112); the first connecting portion (4111) abuts against the stationary contact assembly (31) and is inserted into the mounting groove (11110); the second connecting portion (4112) extends out of the accommodating cavity; the first terminal (414) is connected to the second connecting portion (4112); the connecting board (413) abuts against the outer side of the housing (11); the connecting piece (412) passes through the connecting board (413) and the first connecting portion (4111) in sequence and is connected to the stationary contact assembly (31).

8. The vacuum AC contactor according to claim 7, characterized in that: A stop rib (11111) is provided on the side wall of the installation groove (11110), and the first connecting portion (4111) abuts against the stop rib (11111); and / or The mounting groove (11110) is formed to penetrate to the end surface of the shell (11) toward one end of the first connecting portion (4111).

9. The vacuum AC contactor according to claim 7, characterized in that: The connecting plate (413) comprises an abutting protrusion (4131) and two stoppers (4132) respectively connected to the abutting protrusions (4131); The outer side of the shell (11) is provided with a stop groove (11112) on the outer periphery of the installation groove (11110), the stop portion (4132) is limited in the stop groove (11112), the abutment protrusion (4131) is inserted into the installation groove (11110) and abuts against the terminal board (411), and the connecting piece (412) passes through the abutment protrusion (4131).

10. The vacuum AC contactor according to claim 9, characterized in that: The first connection portion (4111) and the second connection portion (4112) are arranged at an angle, wherein: A side of the abutting protrusion (4131) facing the second connection portion (4112) is provided with an avoidance groove (4133); and / or The second connection portion (4112) abuts against a side of the stop portion (4132) facing the second connection portion (4112).

11. The vacuum AC contactor according to any one of claims 1 to 6, characterized in that: The shell (11) comprises a bottom plate (112), a base (111) and a top plate (113); the base (111) comprises a cylindrical enclosure (1111) and a partition (1112) arranged in the enclosure (1111); a first accommodating cavity is formed between the top plate (113) and the partition (1112); the vacuum tube (20) is arranged in the first accommodating cavity; and the regulating opening (110) is arranged on the enclosure (1111).

12. The vacuum AC contactor according to claim 11, characterized in that: The partition (1112) is provided with a supporting rib (11121), and the vacuum tube (20) is supported on the supporting rib (11121); and / or A buffer is provided between the vacuum tube (20) and the partition (1112).

13. The vacuum AC contactor according to any one of claims 1 to 6, characterized in that: The vacuum AC contactor also includes: Electromagnetic system (50); A contact support (61) is pivotally connected to the housing (11), one end of the contact support (61) is connected to the output end of the electromagnetic system (50), and the other end is connected to the moving contact assembly (32), and the electromagnetic system (50) can drive the contact support (61) to rotate around its pivot axis so that the moving contact assembly (32) and the static contact assembly (31) are connected or disconnected.

14. The vacuum AC contactor according to claim 13, characterized in that: A visible window (1131) is provided on the housing (11), and a first marking piece (611) and a second marking piece (612) are provided on the contact support (61); when the moving contact assembly (32) is connected to the stationary contact assembly (31), the first marking piece (611) is opposite to the visible window (1131); when the moving contact assembly (32) is disconnected from the stationary contact assembly (31), the second marking piece (612) is opposite to the visible window (1131).

15. The vacuum AC contactor according to any one of claims 1 to 6, characterized in that: The housing (11) is provided with a carrying hand groove (11114), and the carrying hand groove (11114) is provided with an anti-slip rib (11115) near the outer surface of the housing (11).

16. The vacuum AC contactor according to claim 1, characterized in that: The shell (11) comprises a bottom plate (112), a base (111) and a top plate (113); the base (111) is cylindrical in structure; the bottom plate (112) and the top plate (113) are respectively connected to two ends of the base (111); the adjustment opening (110) comprises three through holes (11113); each of the through holes (11113) corresponds to one of the adjustable screws (321); the disassembly member (12) is a sealing sheet, and the sealing sheet seals the through hole (11113).

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