Transmission structure of isolating switch

Abstract

The utility model discloses a transmission structure of an isolating switch, which comprises at least two switch unit layers, movable contact discs are arranged in the switch unit layers, the movable contact discs of two adjacent switch unit layers are inserted into each other to form a first insertion structure, and all the movable contact discs are linked through the first insertion structure; the switch further comprises a rigid shaft, the rigid shaft penetrates through the rotating centers of the moving contact discs of all the switch unit layers, and all the moving contact discs are linked through rigidity. The transmission mechanism has the advantage of being good in transmission effect.

Description

Technical Field

[0001] The utility model relates to a rotary disconnecting switch, in particular to a transmission structure of a disconnecting switch. Background Art

[0002] A rotary disconnecting switch generally includes an operating unit layer and a switch unit layer, and the number of switch unit layers is generally more than two. The operating mechanism of the operating unit layer drives the moving contact disk of the switch unit layer to rotate, so as to realize the connection and disconnection of the switch unit layer. The transmission between the switch unit layers is realized by the insertion of the moving contact disks of two adjacent switch unit layers. For example, the structure disclosed in CN220106346U.

[0003] For the switch unit layer with a relatively small number of layers, obviously this transmission structure can meet the requirements. However, with the increase of the number of layers, the driving force received by the moving contact disk of the switch unit layer farther away from the operating mechanism layer will be smaller. Especially for the transmission structure that only uses the insertion of moving contact disks, this situation is particularly obvious.

[0004] Therefore, how to design a new transmission structure has become a problem that needs to be considered. Content of the Utility Model

[0005] In view of this, the purpose of the utility model is to overcome the deficiencies in the prior art, and aims to provide a transmission structure of a disconnecting switch, a disconnecting switch and a power converter, which have a better arc ignition effect.

[0006] The utility model provides a transmission structure of a disconnecting switch, which includes at least two switch unit layers. A moving contact disk is arranged in each switch unit layer. The moving contact disks of two adjacent switch unit layers are inserted into each other to form a first insertion structure, and all the moving contact disks are linked through the first insertion structure. Wherein, a rigid shaft is further included, and the rigid shaft penetrates through the rotation centers of the moving contact disks of all the switch unit layers, and each moving contact disk is also linked through the rigid shaft.

[0007] In some embodiments of the present application, the rigid shaft is a metal shaft; the moving contact disk includes a plugging protrusion and a plugging groove. The plugging protrusion of the lower switch unit layer is inserted into the plugging groove of the upper layer or the plugging protrusion of the upper switch unit layer is inserted into the plugging groove of the lower layer; the plugging protrusion and the plugging groove form a first insertion structure, and the plugging protrusion and the plugging groove are both arranged around the radial direction of the rigid shaft to increase the creepage distance.

[0008] In some embodiments of the present application, the cross-sectional shapes of the plugging protrusion, the metal shaft and the plugging groove are all non-circular.

[0009] In some embodiments of the present application, in the radial direction of the rigid shaft, there is a first gap between the plugging protrusion and the rigid shaft; a second surrounding protrusion is provided in the plugging groove, the second surrounding protrusion surrounds the periphery of the rigid shaft, and the second surrounding protrusion and the first gap are adapted to form a second plugging structure. The first plugging structure and the second plugging structure together improve the creepage distance.

[0010] In some embodiments of the present application, a positioning groove is provided on the second surrounding protrusion, and a positioning protrusion is arranged in the first gap, and the positioning protrusion and the positioning groove form a positioning fit.

[0011] In some embodiments of the present application, the second surrounding protrusion fills at least more than 90% of the space of the first gap.

[0012] In some embodiments of the present application, the moving contact disk has a convex platform protruding downward, the plugging groove is arranged on the convex platform, there is an installation groove above the moving contact disk, and the convex platform of the upper switch unit layer is located in the installation groove of the lower switch unit layer.

[0013] In some embodiments of the present application, the moving contact disk is an integral part, a moving contact installation space is provided on the moving contact disk, and a moving contact is provided on the moving contact installation space; a movement channel for the static contact to extend into is provided on the circumferential wall of the moving contact disk, and the movement channel is communicated with the moving contact installation space to facilitate the cooperation between the moving contact and the static contact when the moving contact disk rotates.

[0014] In some embodiments of the present application, the moving contact disk includes a contact seat and a contact cover, and the contact seat and the contact cover are fixedly connected by snap connection; the contact seat and the contact cover together form a moving contact installation space and a movement channel, a moving contact is installed on the moving contact installation space, and the movement channel is used for the static contact to extend into; the movement channel is communicated with the moving contact installation space to facilitate the cooperation between the moving contact and the static contact when the moving contact disk rotates.

[0015] In some embodiments of the present application, a gas generating member is provided on the moving contact disk, or the contact seat is a gas generating member, or the contact cover is a gas generating member.

[0016] Advantages of the present application compared with the prior art:

[0017] Since a rigid shaft is added as a linkage structure, the rigid shaft also undertakes the role of transmission, which can effectively reduce the attenuation of force (as the number of layers increases, the attenuation of force is inevitable, but the transmission force of the scheme with the rigid shaft plus the first plugging structure will be much greater than that of the scheme with only the first plugging structure). At the same time, the rigid shaft penetrates all the moving contact disks, and the rigid shaft can directly transmit the initial torque to the rear moving contact disk, which can further illustrate that the transmission force of this transmission structure of the present application will be greater than that of the transmission structure in the prior art (in the prior art, the force can only be transmitted layer by layer in sequence). Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 Shows a schematic diagram of the disconnecting switch according to an embodiment of the present invention;

[0020] Figure 2 Shows a schematic diagram of the moving contact disk and the static contact according to an embodiment of the present invention;

[0021] Figure 3 Shows a three-dimensional view of the moving contact disk according to an embodiment of the present invention;

[0022] Figure 4 Shows a three-dimensional view of the moving contact disk from another perspective according to an embodiment of the present invention;

[0023] Figure 5 Shows a schematic diagram of the moving contact disk and the rigid shaft according to an embodiment of the present invention;

[0024] Figure 6 Shows a schematic diagram of two adjacent moving contact disks and the rigid shaft according to an embodiment of the present invention;

[0025] Figure 7 Shows a schematic diagram of another embodiment of the moving contact disk according to an embodiment of the present invention. Detailed Embodiment

[0026] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0029] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature. Embodiment

[0031] Such as Figures 1-7As shown in the figure, an embodiment of the present utility model is a rotary disconnect switch. This rotary disconnect switch includes an operating unit layer K1 and a switch unit layer K2. An operating mechanism is provided in the operating unit layer K1, and a moving contact disc 200 and a static contact 300 are provided in the switch unit layer K2. The rotation of the moving contact disc 200 can be realized through the operating mechanism, so as to realize the connection and disconnection of the switch unit layer K2. As the number of layers of the switch unit layer K2 increases, the force from the operating mechanism will gradually attenuate, and the magnitude of the force of the moving contact disc 200 is proportional to the distance from it to the operating mechanism. The closer it is, the greater the force; the farther it is, the smaller the force. The present application aims to minimize (it is unrealistic to completely avoid the attenuation of force) this force attenuation.

[0032] Since the switch unit layer K2 is a multi-layer structure stacked in sequence, taking two adjacent switch unit layers K2 as an example, the transmission structure of the disconnect switch of the present application will be introduced below:

[0033] The rigid shaft S100 is made of metal material (such as stainless steel). The rigid shaft S100 penetrates through all the moving contact discs 200, and all the moving contact discs 200 can also be linked through the rigid shaft S100. Of course, in addition to stainless steel here, other rigid materials can also be used, as long as it can ensure that the rigid shaft S100 has a certain strength to complete the transmission.

[0034] The switch unit layer K2 has a housing, a moving contact disc 200 and a static contact 300. The cooperation with the static contact 300 can be realized through the rotation of the moving contact disc 200.

[0035] Two adjacent moving contact discs 200 are inserted into each other to form a first insertion structure. All the moving contact discs 200 are linked through the first insertion structure, and the force is transmitted to the last moving contact disc 200 one by one through the moving contact disc 200.

[0036] Here, the first insertion structure includes an insertion protrusion 201 and an insertion groove 202. Two adjacent switch unit layers K2 are inserted into each other through the insertion protrusion 201 inserted into the insertion groove 202. There are two ways here. The first way is that the insertion protrusion 201 of the lower switch unit layer K2 is inserted into the insertion groove 202 of the upper layer, and the second way is that the insertion protrusion 201 of the upper switch unit layer K2 is inserted into the insertion groove 202 of the lower layer. As Figure 6 shown, the insertion protrusion 201 of the lower switch unit layer K2 is inserted into the insertion groove 202 of the upper layer, that is, the insertion protrusion 201 is arranged on the upper part of the moving contact disc 200, and the insertion groove 202 is opened on the lower part of the moving contact disc 200. The opposite way will not be elaborated here, and only the two sets of structures need to be swapped.

[0037] For the moving contact disk 200, it has a convex platform 203 protruding downward, and the insertion groove 202 is arranged on the convex platform 203. There is an installation groove 204 above the moving contact disk 200, and the convex platform 203 of the upper switch unit layer K2 is located in the installation groove 204 of the lower switch unit layer K2, so that the insertion of the first pair of insertion structures can be completed.

[0038] Here, the first pair of insertion structures can not only achieve transmission, but also increase the creepage distance, especially in the case of a rigid shaft S100 with a metal shaft. The reason for increasing the creepage distance here is that the insertion protrusion 201 and the insertion groove 202 are both surrounded in the radial direction of the rigid shaft S100. Therefore, when the two are inserted, a closed structure is formed, increasing the creepage distance.

[0039] Here, in order to further increase the creepage distance, a second pair of insertion structures can be set. The specific structure of the second pair of insertion structures is as follows: in the radial direction of the rigid shaft S100, there is a first gap 205 between the insertion protrusion 201 and the rigid shaft S100; there is a matching second surrounding protrusion 206 in the insertion groove 202, and the second surrounding protrusion 206 surrounds the periphery of the rigid shaft S100. The second surrounding protrusion 206 is inserted into the first gap 205 to form a second pair of insertion structures. In this way, using the first pair of insertion structures and the second pair of insertion structures to form such a continuous staggered structure can better increase the creepage distance. Here, the second surrounding protrusion 206 fills at least more than 90% of the space of the first gap.

[0040] In this way, in order to ensure the assembly between the moving contact disks 200, a positioning groove 207 is provided on the second surrounding protrusion 206, and a positioning protrusion 208 is arranged in the first gap 205. The positioning protrusion 208 and the positioning groove 207 form a positioning fit. A notch can also be provided on the positioning groove 207, which is beneficial for the positioning protrusion 208 to extend in.

[0041] Here, the cross-sectional shapes of the insertion protrusion 201, the metal shaft, and the insertion groove 202 are all non-circular, because the use of non-circular structures can achieve transmission. There are many types of non-circular shapes, such as square, triangular, polygonal, or other special shapes as long as they can ensure the formation of a snap fit in the radial direction to achieve force transmission.

[0042] The moving contact disk 200 can be either integral (for example, integrally injection-molded or ultrasonically welded into one body) or split.

[0043] Such as Figures 2-4As shown, taking the integral type as an example, a moving contact mounting space 209 is provided on the moving contact disk 200, and a moving contact 220 is provided on the moving contact mounting space 209. A movement channel 210 is provided on the circumferential wall of the moving contact disk 200. The movement channel 210 communicates with the moving contact mounting space 209. When the moving contact disk 200 rotates, the static contact 300 can move (here is relative movement) in the movement channel 210 to contact the moving contact disk 200. The above first pair of insertion structures are respectively arranged on the upper and lower parts of the moving contact disk 200.

[0044] As Figure 7 shown, taking the split type as an example, the moving contact disk 200 includes a contact seat 230 and a contact cover 240. The contact seat 230 and the contact cover 240 are fixedly connected by snap connection. There are many types of snap connections. For example, a snap hook 250 can be provided on the contact cover 240, and a snap groove 260 can be opened on the contact seat 230, and the snap hook 250 and the snap groove 260 are matched. Here, the contact seat 230 and the contact cover 240 together form the moving contact mounting space 209 and the movement channel 210. A moving contact 220 is installed on the moving contact mounting space 209, and the movement channel 210 is used for the static contact 300 to extend into. The movement channel 210 communicates with the moving contact mounting space 209. In this way, when the moving contact disk 200 rotates, the static contact 300 can move (here is relative movement) in the movement channel 210 to contact the moving contact disk 200. The above first pair of insertion structures are all arranged on the contact seat 230. Of course, according to the specific structure of the moving contact disk, one of the insertion protrusion 201 and the insertion groove 202 can be arranged on the contact seat 230, and the other can be arranged on the contact cover 240.

[0045] In order to improve the arc extinguishing performance, a gas generating part can also be provided. Here, the gas generating part can be a component independently provided on the moving contact disk 200. It can also be that one of the contact cover 240 and the contact seat 230 is the gas generating part. The gas generating part refers to a material such as PA66, polyamide, etc. that generates gas under the action of the high temperature of the arc gas.

[0046] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A drive structure of a disconnecting switch, which comprises at least two layers of switch unit layers. A moving contact disk is arranged in each switch unit layer. The moving contact disks of two adjacent switch unit layers are inserted into each other to form a first insertion structure, and all the moving contact disks are linked through the first insertion structure. It is characterized in that: It further includes a rigid shaft that passes through the rotation centers of the moving contact discs of all switch unit layers, and the moving contact discs are also linked through the rigid shaft.

2. The drive structure of a disconnector according to claim 1, characterized in that: The rigid shaft is a metal shaft; the moving contact disc includes a plugging protrusion and a plugging groove, and the plugging protrusion of the lower switch unit layer is inserted into the plugging groove of the upper layer or the plugging protrusion of the upper switch unit layer is inserted into the plugging groove of the lower layer; the plugging protrusion and the plugging groove form a first plugging structure, and both the plugging protrusion and the plugging groove are arranged in the radial direction around the rigid shaft to increase the creepage distance.

3. The drive structure of a disconnecting switch according to claim 2, characterized in that: The cross-sectional shapes of the plugging protrusion, the metal shaft, and the plugging groove are all non-circular.

4. The drive structure of a disconnecting switch according to claim 2, characterized in that: In the radial direction of the rigid shaft, there is a first gap between the plugging protrusion and the rigid shaft; a second surrounding protrusion is arranged in the plugging groove, and the second surrounding protrusion surrounds the periphery of the rigid shaft. The second surrounding protrusion and the first gap are adapted to form a second plugging structure, and the first plugging structure and the second plugging structure together improve the creepage distance.

5. The drive structure of a disconnecting switch according to claim 4, wherein: A positioning groove is provided on the second surrounding protrusion, and a positioning protrusion is arranged in the first gap. The positioning protrusion and the positioning groove form a positioning fit.

6. The drive structure of a disconnecting switch according to claim 4, characterized in that: The second surrounding protrusion fills at least more than 90% of the space of the first gap.

7. A driving structure of a disconnector according to any one of claims 2-6, characterized in that: The moving contact disc has a convex platform protruding downward, the plugging groove is arranged on the convex platform, and there is an installation groove above the moving contact disc. The convex platform of the upper switch unit layer is located in the installation groove of the lower switch unit layer.

8. The drive structure of a disconnecting switch according to claim 1, characterized in that: The moving contact disc is an integral part, and a moving contact installation space is provided on the moving contact disc. A moving contact is provided on the moving contact installation space; a movement channel for the static contact to extend into is provided on the circumferential wall of the moving contact disc, and the movement channel is communicated with the moving contact installation space to facilitate the cooperation between the moving contact and the static contact when the moving contact disc rotates.

9. The drive structure of an isolating switch according to claim 1, characterized in that: The moving contact disc includes a contact seat and a contact cover, and the contact seat and the contact cover are fixedly connected by clamping; the contact seat and the contact cover jointly form the moving contact installation space and the movement channel. A moving contact is installed on the moving contact installation space, and the movement channel is used for the static contact to extend into; the movement channel is communicated with the moving contact installation space to facilitate the cooperation between the moving contact and the static contact when the moving contact disc rotates.

10. The drive structure of a disconnector according to claim 9, characterized in that: A gas generating component is provided on the moving contact disc, or the contact seat is a gas generating component, or the contact cover is a gas generating component.

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