Moving contact assembly and isolating switch

Abstract

The utility model provides a moving contact assembly and an isolating switch, and relates to the technical field of isolating switches. The moving contact assembly comprises a support main body and a moving contact piece. The moving contact piece comprises a rotating main body and a moving contact; the rotating body is connected with the supporting body, and the moving contact is connected to the end of the rotating body. Wherein one side, far away from the rotating main body, of the moving contact is provided with a first arc striking surface and a second arc striking surface; an included angle is formed between the first arc striking surface and the second arc striking surface. The isolating switch provided by the utility model adopts the moving contact assembly. According to the moving contact assembly and the isolation switch provided by the utility model, the technical problem that the service life of the moving contact is affected due to the fact that the moving contact is seriously ablated by an electric arc in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of isolating switches, in particular to a moving contact assembly and an isolating switch. Background Art

[0002] Isolating switch is a kind of switch device mainly used for "isolating power supply, switching operation, connecting and disconnecting small current circuit". When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when it is in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions within a specified time.

[0003] In the prior art, an arc is generated when the moving contact is separated from the stationary contact, and the arc stays on the moving contact for a long time, resulting in severe ablation of the moving contact, which greatly affects the service life of the moving contact. Utility Model Content

[0004] The technical problem solved by the utility model is how to improve the technical problem in the prior art that the moving contact is seriously eroded by the arc, which affects the service life.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The utility model provides a moving contact assembly, comprising:

[0007] Supporting entities;

[0008] The movable contact piece comprises a rotating body and a movable contact; the rotating body is connected to the supporting body, and the movable contact is connected to the end of the rotating body;

[0009] Wherein, a first arc-strike surface and a second arc-strike surface are provided on a side of the moving contact away from the rotating body; the first arc-strike surface and the second arc-strike surface are arranged at an angle.

[0010] Compared with the prior art, the movable contact assembly provided by the utility model has the following beneficial effects:

[0011] Since the first arc-striking surface and the second arc-striking surface are formed at an angle on the moving contact, an arc-striking angle can be formed on the moving contact. When the moving contact piece in the moving contact assembly is separated from the stationary contact, the generated arc can be quickly introduced into the arc-extinguishing chamber under the guidance of the first arc-striking surface and the second arc-striking surface to extinguish the arc through the arc-extinguishing chamber. Based on this, the time the arc stays on the moving contact piece can be reduced, thereby reducing the arc erosion of the moving contact piece. Based on this, the moving contact assembly can improve the technical problem in the prior art that the moving contact is severely eroded by the arc, resulting in a shortened service life.

[0012] In addition, since the movable contact assembly adopts a setting mode of a rotating body and a movable contact piece and adopts a single-piece design mode, it can save material costs and reduce the overall manufacturing cost of the movable contact assembly.

[0013] Optionally, the angle between the first arc-initiating surface and the second arc-initiating surface ranges from 90° to 180°.

[0014] Optionally, the moving contact includes a first arc-striking portion and a second arc-striking portion, the first arc-striking portion is arranged at the end of the rotating body, and the second arc-striking portion is arranged on one side of the first arc-striking portion; the first arc-striking surface is formed on the side of the first arc-striking portion away from the rotating body, and the second arc-striking surface is formed on the side of the second arc-striking portion away from the rotating body.

[0015] Optionally, the length of the first arc-initiating surface is greater than the length of the second arc-initiating surface.

[0016] Optionally, a mounting hole is provided in the middle of the rotating body, and the moving contacts are provided at both ends of the rotating body.

[0017] Optionally, the two moving contacts located at both ends of the rotating body are centrally symmetrically arranged.

[0018] Optionally, a mounting groove is provided on the supporting body, and the rotating body is arranged in the mounting groove.

[0019] Optionally, the rotating body is further provided with an anti-fool protrusion, and a clamping groove is opened on the groove wall of the installation groove, and the anti-fool protrusion cooperates with the clamping groove.

[0020] Optionally, the anti-foolproof protrusions are provided on the opposite sides of the rotating body, and the two anti-foolproof protrusions are staggered in a direction perpendicular to the extension direction of the rotating body; the clamping grooves are opened on the two opposite side walls of the installation groove, and the two anti-foolproof protrusions respectively cooperate with the two clamping grooves.

[0021] An isolating switch comprises the above-mentioned moving contact assembly.

[0022] The isolating switch provided by the utility model adopts the above-mentioned moving contact assembly. The beneficial effects of the isolating switch relative to the prior art are the same as the beneficial effects of the above-mentioned moving contact assembly relative to the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a partial structure of an isolating switch provided in an embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the structure of the moving contact assembly provided in an embodiment of the present application;

[0026] Figure 3 This is one of the structural schematic diagrams of the movable contact piece provided in the embodiment of the present application;

[0027] Figure 4 This is the second structural schematic diagram of the moving contact piece provided in the embodiment of the present application;

[0028] Figure 5 This is a schematic structural diagram of the moving contact assembly provided in an embodiment of the present application from another perspective.

[0029] Icons: 10-isolating switch; 11-moving contact assembly; 12-static contact; 100-support body; 110-installation slot; 111-card slot; 200-moving contact piece; 210-rotating body; 211-installation hole; 212-anti-mistake protrusion; 220-moving contact; 221-first arc-striking surface; 2211-first arc-striking portion; 222-second arc-striking surface; 2221-second arc-striking portion. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0034] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0035] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0036] See also Figure 1 In an embodiment of the present application, a moving contact assembly 11 is provided, which can be applied to the isolating switch 10 and is used to cooperate with the static contact 12 in the isolating switch 10. The moving contact assembly 11 and the static contact 12 have a closed state and an open state; in the closed state, the moving contact assembly 11 is in contact with the static contact 12, and the purpose of circuit conduction is completed; in the open state, the moving contact assembly 11 and the static contact 12 are separated, and the purpose of disconnecting the circuit is completed. However, in the process of switching the moving contact assembly 11 and the static contact 12 from the closed state to the open state, an arc is easily formed between the moving contact assembly 11 and the static contact 12, and the arc will cause the moving contact assembly 11 to burn, affecting the service life of the moving contact assembly 11. The moving contact assembly 11 provided in this embodiment can improve the technical problem in the prior art that the moving contact 220 is severely burned by the arc, resulting in a shortened service life.

[0037] In this embodiment, please refer to Figure 2 and Figure 3 The moving contact assembly 11 includes a supporting body 100 and a moving contact piece 200. The moving contact piece 200 includes a rotating body 210 and a moving contact 220; the rotating body 210 is connected to the supporting body 100, and the moving contact 220 is connected to the end of the rotating body 210. The moving contact 220 is provided with a first arc-inducing surface 221 and a second arc-inducing surface 222 on a side away from the rotating body 210; the first arc-inducing surface 221 and the second arc-inducing surface 222 are arranged at an angle.

[0038] When the isolating switch 10 is in the closed state, the moving contact 220 of the moving contact piece 200 contacts the static contact 12 to achieve circuit conduction; when in the open state, the moving contact 220 of the moving contact piece 200 is separated from the static contact 12 to achieve circuit disconnection.

[0039] As described above, since the first arc-striking surface 221 and the second arc-striking surface 222 are formed at an angle on the moving contact 220, an arc-striking angle can be formed on the moving contact 220. When the moving contact assembly 11 is applied to the disconnector 10, and when the moving contact piece 200 in the moving contact assembly 11 is separated from the stationary contact 12, the generated arc can be quickly introduced into the arc extinguishing chamber under the guidance of the first arc-striking surface 221 and the second arc-striking surface 222, so as to extinguish the arc through the arc extinguishing chamber; based on this, the time the arc stays on the moving contact piece 200 can be reduced, thereby reducing the arc erosion of the moving contact piece 200. Based on this, the moving contact assembly 11 can improve the technical problem in the prior art that the moving contact 220 is severely eroded by the arc, resulting in a shortened service life.

[0040] In addition, since the movable contact assembly 11 adopts the configuration mode of the rotating body 210 and the movable contact piece 200 and adopts a single-piece design mode, the material cost can be saved and the overall manufacturing cost of the movable contact assembly 11 can be reduced.

[0041] It should be noted that, in this embodiment, when the moving contact piece 200 is in contact with the stationary contact 12, one side of the moving contact 220 provided with the first arc-striking surface 221 is in contact with the stationary contact 12. In the process of the moving contact 220 and the stationary contact 12 being separated, the first arc-striking surface 221 can quickly introduce the generated arc into the arc-extinguishing chamber to achieve rapid arc extinguishing. The second arc-striking surface 222 can be used to introduce the arc into the arc-striking piece of the arc-extinguishing chamber, and also achieve rapid arc extinguishing.

[0042] In this embodiment, the movable contact piece 200 is in the shape of a sheet as a whole, and the rotating body 210 and the movable contact 220 can be regarded as structures located in the same plane. When the movable contact piece 200 is regarded as a sheet structure, the first arc-inducing surface 221 and the second arc-inducing surface 222 can be regarded as the side of the movable contact 220 away from the rotating body 210. Of course, since the movable contact 220 has a certain thickness, the first arc-inducing surface 221 and the second arc-inducing surface 222 can be formed.

[0043] Further, in this embodiment, please refer to Figure 3 and Figure 4 The angle between the first arc-initiating surface 221 and the second arc-initiating surface 222 ranges from 90° to 180°, wherein: Figure 4The angle A in the figure is the included angle between the first arc-initiating surface 221 and the second arc-initiating surface 222. When the first arc-initiating surface 221 and the second arc-initiating surface 222 are regarded as the side edges of the moving contact 220, the above-mentioned included angle is formed by the two “side edges (the first arc-initiating surface 221 and the second arc-initiating surface 222)” of the moving contact 220.

[0044] It should be noted that, in the present embodiment, the angle formed by the first arc-initiating surface 221 and the second arc-initiating surface 222 can be a right angle or an obtuse angle. When the first arc-initiating surface 221 and the second arc-initiating surface 222 form 180°, it means that the first arc-initiating surface 221 and the second arc-initiating surface 222 are located in the same plane. Therefore, in order to enable the first arc-initiating surface 221 and the second arc-initiating surface 222 to each perform the arc-initiating function more efficiently, preferably, the first arc-initiating surface 221 and the second arc-initiating surface 222 form a right angle or an obtuse angle.

[0045] In this embodiment, the moving contact 220 includes a first arc-striking portion 2211 and a second arc-striking portion 2221. The first arc-striking portion 2211 is arranged at the end of the rotating body 210, and the second arc-striking portion 2221 is arranged on one side of the first arc-striking portion 2211; the first arc-striking surface 221 is formed on the side of the first arc-striking portion 2211 away from the rotating body 210, and the second arc-striking surface 222 is formed on the side of the second arc-striking portion 2221 away from the rotating body 210.

[0046] The moving contact 220 can be divided into two parts, the first arc-starting portion 2211 is located at the end of the rotating body 210, and the first arc-starting surface 221 is provided on the first arc-starting portion 2211; at the same time, in this embodiment, when the first arc-starting surface 221 is regarded as the side of the first arc-starting portion 2211, the first arc-starting surface 221 forms an angle with the extension direction of the rotating body 210. Based on this, the first arc-starting portion 2211 can be regarded as roughly forming a trapezoid or a triangle; and the second arc-starting portion 2221 is provided on the first arc-starting portion 2211 adjacent to the side of the rotating body 210.

[0047] Furthermore, the length of the first arc-striking surface 221 is greater than the length of the second arc-striking surface 222. In the case where the moving contact piece 200 is in contact with the stationary contact 12, the first arc-striking portion 2211 is in contact with the stationary contact 12. After the first arc-striking portion 2211 is separated from the stationary contact 12, the generated arc is guided to the arc extinguishing chamber by the first arc-striking surface 221. Since the first arc-striking surface 221 plays a major role in guiding the movement of the arc, the length of the first arc-striking surface 221 is set to be greater than the length of the second arc-striking surface 222. The longer the first arc-striking surface 221 is, the more conducive it is to guide the generated arc from the stationary contact 12 to the moving contact 220, and the arc can be quickly introduced into the arc extinguishing chamber. In addition, when the length of the first arc-starting surface 221 is longer, the position of the angle formed by the first arc-starting surface 221 and the second arc-starting surface 222 deviates more from the center line of the rotating body 210, thereby making the overall area of ​​the first arc-starting portion 2211 larger. At this time, when the moving contact 220 and the static contact 12 are in contact, the contact area can be made larger.

[0048] In this embodiment, a mounting hole 211 is provided in the middle of the rotating body 210, and moving contacts 220 are provided at both ends of the rotating body 210. The mounting hole 211 can be used to install the rotating shaft to facilitate the rotation of the moving contact piece 200. In addition, the moving contacts 220 provided at both ends of the rotating body 210 are centrally symmetrically arranged with the mounting hole 211 as the center.

[0049] In addition, in this embodiment, please refer to Figure 3 and Figure 5 The supporting body 100 is provided with a mounting groove 110, and the rotating body 210 is arranged in the mounting groove 110. The mounting groove 110 provides a limiting effect on the rotating body 210, thereby improving the installation stability of the movable contact piece 200. In addition, during the assembly process, the mounting groove 110 can also provide a positioning effect on the rotating body 210, thereby improving the assembly efficiency.

[0050] It is worth noting that when the rotating body 210 is installed in the installation groove 110, the exposed side of the rotating body 210 is flush with the side of the supporting body 100, so that the moving contact piece 200 and the supporting body 100 form a whole, which facilitates the overall installation of the moving contact assembly 11.

[0051] Furthermore, a foolproof protrusion 212 is provided on the rotating body 210, and a clamping groove 111 is provided on the groove wall of the installation groove 110, and the foolproof protrusion 212 cooperates with the clamping groove 111. The foolproof protrusion 212 is provided on the rotating body 210, and the clamping groove 111 is provided on the side wall of the installation groove 110. During the assembly process, the installation and positioning of the rotating body 210 can be achieved through the cooperation of the foolproof protrusion 212 and the clamping groove 111, so as to avoid the rotating body 210 from being installed incorrectly, thereby improving the assembly efficiency and the assembly qualification rate.

[0052] Optionally, in this embodiment, two anti-fool-proofing protrusions 212 are provided on opposite sides of the rotating body 210, and the two anti-fool-proofing protrusions 212 are staggered in a direction perpendicular to the extending direction of the rotating body 210; two opposite side walls of the mounting groove 110 are provided with a clamping groove 111, and the two anti-fool-proofing protrusions 212 are respectively matched with the two clamping grooves 111. By setting the two anti-fool-proofing protrusions 212 that are staggered, the occurrence of installation errors of the rotating body 210 can be further avoided. In addition, the two anti-fool-proofing protrusions 212 are also centrally symmetrically arranged with the mounting hole 211 as the center, so that the movable contact piece 200 can also be correctly installed when it is rotated 180°, which can improve the assembly efficiency of the movable contact piece 200.

[0053] Based on the moving contact assembly 11 provided above, an isolating switch 10 is also provided in this embodiment. The isolating switch 10 adopts the moving contact assembly 11 and can improve the technical problem in the prior art that the moving contact 220 is severely eroded by arc and its service life is affected.

[0054] In summary, since the first arc-striking surface 221 and the second arc-striking surface 222 are formed at an angle on the moving contact 220, an arc-striking angle can be formed on the moving contact 220. When the moving contact assembly 11 is applied to the isolating switch 10, and when the moving contact piece 200 in the moving contact assembly 11 is separated from the static contact 12, the generated arc can be quickly introduced into the arc extinguishing chamber under the guidance of the first arc-striking surface 221 and the second arc-striking surface 222, so as to achieve arc extinguishing through the arc extinguishing chamber; based on this, the time the arc stays on the moving contact piece 200 can be reduced, thereby reducing the arc erosion of the moving contact piece 200. Based on this, the moving contact assembly 11 can improve the technical problem in the prior art that the moving contact 220 is severely eroded by the arc, resulting in a shortened service life. By providing the anti-mistake protrusion 212 on the rotating body 210, the occurrence of incorrect installation of the moving contact piece 200 can be avoided, the assembly yield rate can be improved, and the assembly efficiency can be improved.

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A moving contact assembly, characterized in that: include: Supporting entities; The movable contact piece comprises a rotating body and a movable contact; the rotating body is connected to the supporting body, and the contact is connected to the end of the rotating body; Wherein, a first arc-strike surface and a second arc-strike surface are provided on a side of the moving contact away from the rotating body; the first arc-strike surface and the second arc-strike surface are arranged at an angle.

2. The moving contact assembly according to claim 1, characterized in that: The included angle between the first arc-starting surface and the second arc-starting surface ranges from 90° to 180°.

3. The moving contact assembly according to claim 1, characterized in that: The moving contact includes a first arc-striking portion and a second arc-striking portion, the first arc-striking portion is arranged at the end of the rotating body, and the second arc-striking portion is arranged at one side of the first arc-striking portion; the first arc-striking surface is formed on the side of the first arc-striking portion away from the rotating body, and the second arc-striking surface is formed on the side of the second arc-striking portion away from the rotating body.

4. The moving contact assembly according to claim 3, characterized in that: The length of the first arc-initiating surface is greater than the length of the second arc-initiating surface.

5. The moving contact assembly according to claim 1, characterized in that: A mounting hole is provided in the middle of the rotating body, and the moving contacts are provided at both ends of the rotating body.

6. The moving contact assembly according to claim 5, characterized in that: The two moving contacts located at two ends of the rotating body are centrally symmetrically arranged.

7. The moving contact assembly according to any one of claims 1 to 6, characterized in that: The supporting body is provided with a mounting groove, and the rotating body is arranged in the mounting groove.

8. The moving contact assembly according to claim 7, characterized in that: The rotating body is also provided with an anti-mistake protrusion, and the groove wall of the installation groove is provided with a clamping groove, and the anti-mistake protrusion cooperates with the clamping groove.

9. The moving contact assembly according to claim 8, characterized in that: The anti-foolproofing protrusions are provided on the opposite sides of the rotating body, and the two anti-foolproofing protrusions are staggered in a direction perpendicular to the extending direction of the rotating body; the clamping grooves are opened on the two opposite side walls of the installation groove, and the two anti-foolproofing protrusions cooperate with the two clamping grooves respectively.

10. An isolating switch, characterized in that: Comprising the moving contact assembly as described in any one of claims 1-9.

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