Moving contact assembly, contact mechanism and contact unit

Abstract

A moving contact assembly, a contact mechanism and a contact unit are provided, the moving contact assembly comprises a rotating shaft and a moving contact bridge arranged in the rotating shaft, two ends of the moving contact bridge are respectively used as moving contact parts, each moving contact part extends out of the rotating shaft along the radial direction of the rotating shaft, the moving contact assembly also comprises a housing, the rotating shaft is rotatably supported in an accommodating cavity of the housing, and the housing is provided with an opening. The shell is provided with two opposite openings, and the openings are communicated with the containing cavity. According to the invention, the moving contact assembly, the contact mechanism, the contact unit and the rotating shaft are assembled in the accommodating cavity of the shell, so that the moving contact assembly forms a whole, the formation of the contact mechanism with a modular structure is facilitated, the assembly is convenient, and the modular development of the disconnecting switch is facilitated.

Description

Technical Field

[0001] The invention relates to the field of switch electrical appliances, and in particular to a moving contact assembly, a contact mechanism and a contact unit. Background Art

[0002] With the rapid development of the AC and DC electrical industry, rotary isolating switches have been widely used. An isolating switch is a switch device that has both isolating and switching functions. However, in traditional rotary isolating switches, a moving contact assembly and a pair of stationary contact assemblies are usually provided, wherein the moving contact assembly is located between the pair of stationary contact assemblies, and the moving contact assembly is driven to rotate by the operating mechanism to achieve contact and separation with the stationary contact assembly. However, the moving contact assembly is usually directly rotated and assembled in the housing. Due to the complex structure of the moving contact assembly, its assembly process is relatively cumbersome, which is not conducive to ensuring the matching stability, nor is it conducive to the modular development of the isolating switch. Summary of the invention

[0003] The object of the present invention is to overcome at least one defect of the prior art and provide a moving contact assembly with simple structure and high reliability.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a moving contact assembly, including a rotating shaft and a moving contact bridge arranged in the rotating shaft, wherein the two ends of the moving contact bridge serve as moving contact parts respectively, and each moving contact part extends outside the rotating shaft along the radial direction of the rotating shaft. The present invention also includes a shell, and the rotating shaft is rotatably supported in an accommodating cavity of the shell. The shell has two opposite openings, and the openings are connected to the accommodating cavity.

[0006] Furthermore, a limiting portion for limiting assembly is provided on the outer surface of the shell.

[0007] Furthermore, a pair of shell side walls connected between the two openings serve as support walls, and the support walls are provided with a communicating hole coaxial with the rotating shaft.

[0008] Furthermore, the outer surface of the shell is also provided with a first limiting portion surrounding the communicating hole.

[0009] Furthermore, a pair of shell side walls connected between the two openings serve as connecting walls, each connecting wall is adjacent to the supporting wall, and a second limiting portion is provided on an outer surface of the connecting wall.

[0010] Further, the shell is an integral structure; or, the shell includes two plates that are spaced apart and opposite to each other, the two plates together form a hollow cavity with open ends, and the hollow portion of the hollow cavity serves as a receiving chamber.

[0011] Furthermore, the shell is provided with an assembly groove communicating with the accommodating cavity.

[0012] Furthermore, a mutually cooperating splicing structure is provided between the two plate bodies, and the splicing structure enables the two plate bodies to form a whole body that can be plugged in and out and disassembled; or, the two plate bodies are fixedly connected as a whole.

[0013] Furthermore, the splicing structure includes at least one pair of mutually cooperating slots and buckles, wherein one plate body is provided with a slot and / or a buckle, and the other plate body is provided with a buckle and / or a slot.

[0014] Furthermore, at least one set of positioning structures is provided between the two plates, and the positioning structures include positioning bosses and positioning grooves, wherein one plate is provided with a positioning boss and / or a positioning groove, and the other plate is provided with a positioning groove and / or a positioning boss.

[0015] Furthermore, the two side edges of the plate body are extended to form extension parts, and the extension parts on the same side of the two plate bodies are butted or overlapped to form a connecting wall.

[0016] The present invention also provides a contact mechanism, including a pair of stationary contact assemblies, each stationary contact assembly including a stationary contact portion, and also including the moving contact assembly as described above, the rotating shaft is rotatably arranged between the pair of stationary contact assemblies, and each stationary contact portion corresponds to a moving contact portion.

[0017] The present invention further provides a contact unit, comprising a housing, wherein the contact mechanism as described above is arranged in the housing.

[0018] Preferably, two groups of limiting structures are arranged between the shell and the shell of the contact mechanism, wherein one group of limiting structures includes a first limiting portion and a first matching portion, and the other group of limiting structures includes a second limiting portion and a second matching portion, the first limiting portion and the second limiting portion are respectively located on the outer surfaces of two adjacent side walls of the shell, and the first matching portion and the second matching portion are located on two adjacent inner side walls of the shell.

[0019] The movable contact assembly, contact mechanism and contact unit of the present invention have a rotating shaft assembled in the accommodating cavity of the shell, so that the movable contact assembly forms an integral body, which is conducive to forming a modular structure of the contact mechanism, is easy to assemble, and is conducive to the modular development of the isolating switch.

[0020] In addition, a limiting portion is provided on the outer surface of the shell to ensure stable assembly when the moving contact assembly is assembled on the contact unit. In particular, the first limiting portion and the second limiting portion are respectively provided on the outer surfaces of adjacent supporting walls and connecting walls, which is conducive to limiting from different directions and further improving the assembly stability.

[0021] In addition, the shell can be an integral structure or a split structure, in which the two plates of the split structure can form a detachable whole through the splicing structure, which has the advantage of convenient disassembly and assembly, or can be directly fixed as one to ensure firmness, which can meet different needs and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the contact mechanism in the present invention;

[0023] Figure 2-3 is an exploded schematic diagram of the contact mechanism in the present invention;

[0024] Figure 4 : is a schematic diagram of the structure of the plate body in the present invention (the side facing the accommodating cavity);

[0025] Figure 5 Schematic diagram of the structure of the plate body in the present invention (the side facing away from the accommodating cavity);

[0026] Figure 6 It is a schematic diagram of the structure of the housing in the present invention;

[0027] Figure 7 It is a structural schematic diagram of the contact unit in the present invention;

[0028] Reference numerals:

[0029] a-contact mechanism, 1-moving contact assembly, 11-rotating shaft, 114-transmission shaft, 12-moving contact bridge, 2-static contact assembly, 21-static contact portion, 22-wiring portion, 3-shell, 301-plate body, 302-support wall, 303-connecting wall, 304-extension portion, 31-assembly groove, 33-connecting hole, 341-first limiting portion, 342-second limiting portion, 351-clip, 352-slot, 361-positioning groove, 40-arc extinguishing chamber, 5-housing, 511-first matching portion, 512-second matching portion. DETAILED DESCRIPTION

[0030] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation of the movable contact assembly, contact mechanism and contact unit of the present invention. The movable contact assembly, contact mechanism and contact unit of the present invention are not limited to the description of the following embodiments.

[0031] The rotary disconnector comprises an operating module and a contact module which are stacked. The contact module comprises at least one contact unit. Two adjacent contact units are linked and connected. The operating mechanism of the operating module drives at least one contact unit to open and close.

[0032] Specifically, Figure 1-3As shown in Figures 7 and 8, each contact unit includes a housing 5, in which a contact mechanism a and a pair of wiring assemblies (not shown) are arranged, the contact mechanism a includes a moving contact assembly 1 and a pair of static contact assemblies 2, each static contact assembly 2 is connected to a wiring assembly, the moving contact assembly 1 rotates between the pair of static contact assemblies 2, and is used to connect or disconnect the main line in each contact unit, wherein the moving contact assembly 1 includes a rotating shaft 11 and a pair of moving contact parts arranged in the rotating shaft 11, the rotating shaft 11 is rotatably arranged between the pair of static contact assemblies 2, a moving contact bridge 12 is arranged in the rotating shaft 11, and the two ends of the moving contact bridge 12 serve as moving contact parts respectively, each moving contact part extends radially along the rotating shaft 11 to the outside of the rotating shaft 11, as the rotating shaft 11 is driven to rotate, each moving contact part is respectively in contact with or separated from a static contact assembly 2; two adjacent contact units are linked and connected through the rotating shaft 11, so as to realize the synchronous opening and closing of the contact mechanism a in all contact units.

[0033] The improvement of the present application is that the moving contact assembly 1 also includes a shell 3, and the rotating shaft 11 is rotatably supported in the accommodating cavity of the shell 3. The shell 3 has two opposite openings, which are connected to the accommodating cavity. In this way, the rotating shaft 11 is assembled in the accommodating cavity of the shell 3, so that the moving contact assembly 1 forms a whole, which is conducive to forming a contact mechanism a with a modular structure, is convenient for assembly, and is conducive to the modular development of the isolating switch.

[0034] Preferably, a limiting portion is provided on the outer surface of the shell 3, and the limiting portion may be a boss, a groove or other structure. A matching portion is provided in the shell 5 for assembling the moving contact assembly 1. When the moving contact assembly 1 is assembled in the shell 5 of the contact unit, the limiting portion cooperates with the matching portion to stably assemble the moving contact assembly 1 therein, thereby avoiding unstable matching.

[0035] Specifically, the shell 3 is provided with a pair of opposite openings, and the two pairs of shell 3 side walls connected between the pair of openings are respectively a pair of supporting walls 302 and a pair of connecting walls 303, each connecting wall 303 is adjacent to a supporting wall 302, and the supporting wall 302 is provided with a connecting hole 33, and the connecting hole 33 is coaxial with the rotating shaft 11 for rotating and supporting the rotating shaft 11, and for limiting the position of the rotating shaft 11 from the axial direction, and the outer surface of the shell 3 is also provided with a first limiting portion 341 surrounding the connecting hole 33, that is, the outer surface of the supporting wall 302 is provided with a first limiting portion 341, and the first limiting portion 341 is preferably Boss structure; a second limiting portion 342 is provided on the connecting wall 303, and the second limiting portion 342 can be in the shape of a boss, a groove, etc., and its specific shape and structure are not specifically limited. When the moving contact assembly 1 is assembled in the shell 5, the first limiting portion 341 and the second limiting portion 342 are respectively matched with the first matching portion 511 and the second matching portion 512 arranged in the shell 5. The first matching portion 511 is preferably an annular groove, and the shape of the second matching portion 512 matches the shape of the first limiting portion 341. The moving contact assembly 1 is limited from different directions, which is beneficial to improving its assembly stability.

[0036] Furthermore, the housing 3 may be an integral structure (see Figure 1 ), or it can be a split structure. When the shell 3 is a split structure, the shell 3 preferably includes two plate bodies 301, wherein the two plate bodies 301 can be fixedly connected as a whole. This structure is conducive to ensuring the connection stability of the two plate bodies 301. Of course, a mutually matching splicing structure can also be formed between the two plate bodies 301, and the two plate bodies 301 are formed into a pluggable and detachable whole by the splicing structure, which is convenient for disassembly and assembly of the moving contact assembly 1, wherein the assembling structure includes mutually matching buckles 351 and slots 352, wherein the buckles 351 can be assembled on the two plate bodies 301 individually or simultaneously, and correspondingly, the slots 352 can also be assembled on the two plate bodies 301 individually or simultaneously.

[0037] Combination Figure 1-7 A specific embodiment of a moving contact assembly 1 is provided.

[0038] like Figure 1-3 As shown, the moving contact assembly 1 includes a shell 3, a rotating shaft 11 and a moving contact bridge 12. The housing cavity of the shell 3 is provided with two opposite openings. The rotating shaft 11 is rotatably supported in the housing cavity between the two openings. The moving contact bridge 12 is arranged in the rotating shaft 11 along the radial direction of the rotating shaft 11. Both ends of the moving contact bridge 12 serve as moving contact parts extending to the outside of the rotating shaft 11 along the radial direction of the rotating shaft 11. In the present embodiment, each moving contact part corresponds to an opening, that is, when the moving contact assembly 1 is opened and closed, each moving contact part moves from one side of an opening to the other side of the same opening. During this process, a partial area of ​​the moving contact part can extend out of the opening.

[0039] Specific as Figure 4 , 5 As shown, the two pairs of side walls of the shell 3 connected between the two openings are respectively a pair of supporting walls 302 and a pair of connecting walls 303, each connecting wall 303 is adjacent to a supporting wall 302, a connecting hole 33 is opened in the middle of the pair of supporting walls 302, the rotating shaft 11 is rotatably supported between the pair of connecting walls 303, and each connecting hole 33 is coaxial with the rotating shaft 11, so that the output shaft of the operating mechanism or the transmission shaft 114 of two adjacent contact units can pass through the connecting hole 33 to drive the rotating shaft 11 to rotate, and a first limiting portion 341 is protrudingly provided on the outer surface of the supporting wall 302. In this embodiment, as shown in FIG. Figure 5 As shown, the first limiting portion 341 is an annular boss surrounding the outside of the connecting hole 33; a second limiting portion 342 is provided on the outer surface of the connecting wall 303. Figure 5 The second limiting portion 342 is a strip groove, and the central axis of the strip groove is parallel to the central axis of the connecting hole 33. Accordingly, a first matching portion 511 and a second matching portion 512 are provided in the housing 5 for assembling the moving contact assembly 1. Figure 6 As shown, the first matching portion 511 is preferably an annular groove. A central hole is opened in the middle of the shell 5 in the figure. The first matching portion 511 is arranged around the edge of the central hole. The second matching portion 512 is a protruding strip-shaped boss. The first matching portion 511 and the first limiting portion 341 limit the moving contact assembly 1 axially parallel to the rotating shaft 11, and the second matching portion 512 and the second limiting portion 342 limit the moving contact assembly 1 axially perpendicular to the rotating shaft 11, which is beneficial to ensure the stability of its assembly.

[0040] In this embodiment, if Figure 2-5 As shown, the shell 3 includes two plate bodies 301 that are spaced apart and opposite to each other. The shapes of the two plate bodies 301 can be the same or different, but the two plate bodies 301 together form a hollow cavity with open ends, and the hollow cavity as a whole is a "□"-shaped cavity, with the hollow part of the hollow cavity serving as a accommodating cavity, wherein the two plate bodies 301 can be formed by "-" and "U" shapes respectively, or can be formed by two "U"-shaped plate bodies 301 together, or both of the two plate bodies 301 are "∟"-shaped.

[0041] like Figure 2-5 As shown, in this embodiment, each plate body 301 is preferably in a rectangular plate-like structure as a whole, and protruding extension portions 304 are provided on both sides of the plate surface of each plate body 301, so that each plate body 301 is in a "U" shape, and the extension portions 304 on the same side of the two plate bodies 301 cooperate to form a pair of connecting walls 303 of the shell 3, and the two extension portions 304 can overlap or butt together to form the connecting wall 303, and the middle parts of the two plate bodies 301 are spaced apart and relative to each other to form a pair of supporting walls 302 of the shell 3.

[0042] Furthermore, a mutually cooperating splicing structure is provided between the two plate bodies 301, and the splicing structure includes at least one pair of mutually cooperating buckles 351 and slots 352, wherein one of the plate bodies 301 is provided with a slot 352 and / or a buckle 351, and the other plate body 301 is provided with a buckle 351 and / or a slot 352. In the present embodiment, a slot 352 is provided in the middle of two extension portions 304 of one of the plate bodies 301, and a buckle 351 is protruding in the middle of two extension portions 304 of the other plate body 301. When the two extension portions 304 are butt-jointed to form a connecting wall 303, the buckle 351 cooperates with the slot 352 to form a plug-in and disassembly structure, which facilitates the assembly of the rotating shaft 11 in the accommodating cavity.

[0043] Preferably, each connecting wall 303 is provided with an assembly groove 31, each stationary contact assembly 2 is matched with the moving contact assembly 1 through the assembly groove 31, and the two assembly grooves 31 form a rotationally symmetrical structure about the central axis of the connecting hole 33. In this embodiment, a groove structure is provided at the edge of each extension 304, and when the two extensions 304 are butted, the two groove structures cooperate to form the assembly groove 31, and the stationary contact assembly 2 can be clamped when the two extensions 304 are butted, thereby achieving stable matching between the stationary contact assembly 2 and the housing 3. Of course, the housing 3 may also not be provided with the assembly groove 31, and the stationary contact assembly 2 extends from the opening of the housing 3 to the inside of the housing 3 to match with the moving contact assembly 1, or the stationary contact assembly 2 and the moving contact part may also match outside the opening.

[0044] Further, at least one set of positioning structures may be provided between the two plates 301, wherein the positioning structures include positioning bosses (not shown) and positioning grooves 361, wherein one plate 301 is provided with a positioning boss and / or a positioning groove 361, and the other plate 301 is provided with a positioning groove 361 and / or a positioning boss. In this embodiment, two extension portions 304 of one plate 301 are respectively provided with a positioning groove 361, and the two positioning grooves 361 form a rotationally symmetrical structure about the central axis of the communicating hole 33, that is, Figure 4 The two positioning grooves 361 are respectively located at the corners of the same plate body 301 , and a positioning boss is respectively provided on the two extension portions 304 of the two plate bodies 301 . Each positioning boss cooperates with a positioning groove 361 for positioning, which facilitates assembly.

[0045] In addition, the extension portions 304 of the two shells 3 are fixedly connected together, for example, by means of screws or bonding processes such as hot riveting, ultrasonic riveting, etc. At this time, the two extension portions 304 can be either end-to-end or side-to-side. This can ensure the stability of the shell 3, but it is inconvenient to disassemble and assemble. At this time, an assembly groove 31 needs to be opened in the connecting wall 303. Of course, the shell 3 can also be an integrally molded structure.

[0046] In this embodiment, the rotating shaft 11 can adopt the existing technology, a radial groove is provided inside the rotating shaft 11, the moving contact bridge 12 is assembled in the radial groove, and the two ends of the moving contact bridge 12 respectively extend to the outside of the rotating shaft 11 along the radial direction of the rotating shaft 11 as the moving contact parts; each static contact assembly 2 can also adopt the existing technology, such as Figure 2 , 3 As shown, the static contact assembly 2 includes a conductive plate. In the present embodiment, each conductive plate passes through an assembly slot 31 and is clamped under the action of two plate bodies 301. A static contact portion 21 is provided at one end of the conductive plate, and the static contact portion 21 extends into the accommodating cavity for cooperation with the dynamic contact portion. A wiring portion 22 is provided at the other end of the conductive plate, and each wiring portion 22 is respectively connected to a wiring assembly.

[0047] In addition, an arc extinguishing system may be provided in each contact unit. The arc extinguishing system includes an arc extinguishing chamber cooperating with the contact mechanism a. The arc extinguishing chamber cooperates with the contact mechanism a to extinguish the arc generated by the disconnection.

[0048] In addition, at least one set of limiting structures is arranged between the shell 5 and the shell 3 of the contact mechanism a, and each set of limiting structures includes a concave-convex matching limiting portion and a matching portion, the limiting portion is arranged on the outer surface of the shell 3, and the matching portion is arranged in the shell 3. In this embodiment, two sets of limiting structures are arranged between the shell 5 and the shell 3, wherein one set of limiting structures includes a first limiting portion 341 and a first matching portion 511, and the other limiting structure includes a second limiting portion 342 and a second matching portion 512, wherein the first limiting portion 341 and the second limiting portion 342 are respectively located on the outer surfaces of two adjacent side walls of the shell 3, and the first matching portion The engaging portion 511 and the second engaging portion 512 are located on two adjacent inner side walls of the housing 5. Specifically, the annular groove surrounding the edge of the central groove is the first engaging portion 511 for engaging with the first limiting portion 341 of the housing 3. The second engaging portion 512 is a protruding strip-shaped boss. The second engaging portion 512 is arranged on the limiting plate 53. The first engaging portion 511 and the first limiting portion 341, in this way, the first engaging portion 511 and the first limiting portion 341, and the second engaging portion 512 and the second limiting portion 342 respectively limit the contact mechanism a from two mutually perpendicular directions, which is conducive to ensuring the stability of its assembly. Of course, the shapes of the first limiting portion 341, the second limiting portion 342, the first engaging portion 511 and the second engaging portion 512 are not limited to the above description.

[0049] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0050] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A moving contact assembly, comprising a rotating shaft (11) and a moving contact bridge (12) arranged in the rotating shaft (11), wherein both ends of the moving contact bridge (12) serve as moving contact portions, each moving contact portion extending radially along the rotating shaft (11) to the outside of the rotating shaft (11), characterized in that: It also comprises a shell (3), wherein the rotating shaft (11) is rotatably supported in a receiving cavity of the shell (3), and the shell (3) is provided with two opposite openings, which are communicated with the receiving cavity.

2. The moving contact assembly according to claim 1, characterized in that: The outer surface of the housing (3) is provided with a limiting portion for limiting assembly.

3. The moving contact assembly according to claim 1 or 2, characterized in that: A pair of side walls of the housing (3) connected between the two openings serve as a support wall (302), and the support wall (302) is provided with a communicating hole (33) coaxial with the rotating shaft (11).

4. The moving contact assembly according to claim 3, characterized in that: The outer surface of the shell (3) is also provided with a first limiting portion (341) surrounding the communicating hole (33).

5. The moving contact assembly according to claim 3, characterized in that: A pair of shell (3) side walls connected between the two openings serve as connecting walls (303), each connecting wall (303) is adjacent to the supporting wall (302), and a second limiting portion (342) is provided on the outer surface of the connecting wall (303).

6. The moving contact assembly according to claim 1, characterized in that: The housing (3) is an integrated structure; Alternatively, the housing (3) comprises two plates (301) spaced apart and facing each other, the two plates (301) together forming a hollow cavity with two ends open, and the hollow portion of the hollow cavity serves as a receiving chamber.

7. The moving contact assembly according to claim 6, characterized in that: The housing (3) is provided with an assembly groove (31) which is in communication with the accommodating cavity.

8. A contact mechanism, comprising a pair of stationary contact assemblies (2), each stationary contact assembly (2) comprising a stationary contact portion (21), characterized in that: It also comprises a moving contact assembly (1) as claimed in any one of claims 1 to 7, wherein the rotating shaft (11) is rotatably arranged between a pair of stationary contact assemblies (2), and each stationary contact portion (21) corresponds to a moving contact portion.

9. A contact unit, comprising a housing (5), characterized in that: The contact mechanism (a) according to claim 8 is arranged in the housing (5).

10. The contact unit according to claim 9, characterized in that: Two groups of limiting structures are arranged between the shell (5) and the shell (3) of the contact mechanism (a), wherein one group of limiting structures comprises a first limiting portion (341) and a first matching portion (511), and the other group of limiting structures comprises a second limiting portion (342) and a second matching portion (512), wherein the first limiting portion (341) and the second limiting portion (342) are respectively located on the outer surfaces of two adjacent side walls of the shell (3), and the first matching portion (511) and the second matching portion (512) are located on two adjacent inner side walls of the shell (5).

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