Moving contact, contact structure and switching device

Abstract

The utility model discloses a moving contact, a contact structure and a switching device, comprising a contact support configured to rotate around a rotating shaft A. The contact support is rotatably connected with a contact piece rotating around a rotating shaft B. The contact piece is provided with a moving contact. And a fulcrum part for forming a lever rotating fulcrum structure is arranged on the part, between the rotating shaft B and the movable contact, of the contact piece. According to the utility model, the moving contact can be switched from a closed state to an open state when the switching device is closed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of switchgear, specifically relates to a moving contact, contact structure and switchgear. BACKGROUND

[0002] With the development of new energy technology, especially the development of photovoltaic power generation and energy storage technology, the system voltage gradually increases from the initial 500V to the present 1500V, and further develops to 2000V, 2500V, 3000V and higher levels in the future, so the rated working voltage requirement of the switchgear (disconnector or circuit breaker) is also constantly improved. In an improved structure, the breaking contact is used to break the current of the circuit in parallel with the current-carrying contact of the switchgear, and the current-carrying contact and the breaking contact are linked by a linkage mechanism, and in some special cases, the breaking contact needs to be switched from the closed state to the open state under the control of the linkage mechanism when the switchgear is closed. However, the existing ordinary contact structure is difficult to meet the above-mentioned contact state switching requirement under the control of the existing linkage mechanism. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a moving contact, which mainly solves the technical problem that the existing ordinary contact structure is difficult to switch from the closed state to the open state when the switchgear is closed.

[0004] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0005] A moving contact, comprising a contact support configured to rotate about a rotation axis A, a contact piece rotating about a rotation axis B connected to the contact support, a moving contact point provided on the contact piece, and a fulcrum portion for forming a lever rotation fulcrum structure provided on the part of the contact piece between the rotation axis B and the moving contact point.

[0006] Further, an elastic reset member is provided between the contact support and the contact piece for making the moving contact point elastically contact.

[0007] Further, the fulcrum portion is a hemispherical contact structure.

[0008] Further, the size of the fulcrum portion is larger than the size of the moving contact point.

[0009] Based on the same inventive concept, the utility model also provides a contact structure, including the static contact and above any described dynamic contact of mutual cooperation, wherein, in the installation space of contact structure fixedly be provided with for with the fulcrum portion on the dynamic contact contact cooperation limiting portion, and contact structure is configured as through linkage mechanism with switch electric appliance's drive shaft is connected, by the rotation of drive shaft drives linkage mechanism action to drive the contact support rotation around rotating shaft A, thereby control dynamic contact and corresponding static contact contact or break.

[0010] Further, when the drive shaft rotates and the contact support of the dynamic contact is controlled by the linkage mechanism to rotate in the closing direction close to the static contact, the contact of the dynamic contact on the contact piece is configured to contact the static contact first, and then the fulcrum portion contacts the limiting portion, and then the dynamic contact continues to act under the driving of the linkage mechanism until the fulcrum portion on the contact piece contacts the limiting portion, the contact piece forms a lever structure with the fulcrum portion as the rotating fulcrum, and when the linkage mechanism drives the contact support to continue to act, the end of the contact piece provided with the dynamic contact will be raised and disconnected from the static contact.

[0011] Further, the limiting portion is fixedly connected with the static contact.

[0012] Further, at least one of the limiting portion and the fulcrum portion is a non-conductive structure.

[0013] Based on the same inventive concept, the utility model also provides a switch electric appliance, including the dynamic contact or contact structure of any described above.

[0014] Further, the switch electric appliance is a disconnector or a circuit breaker.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In the dynamic contact, the contact structure and the switch electric appliance, the contact support is configured to rotate around the rotating shaft A and can be controlled to act by the linkage mechanism, and then the contact piece is arranged to rotate around the rotating shaft B on the contact support, and the fulcrum portion is arranged on the contact piece, in use, the dynamic contact on the contact piece is closer to the end of the contact piece relative to the fulcrum portion, so that when the linkage mechanism controls the contact support to act in the closing direction, the dynamic contact will be in contact with the corresponding static contact first, then the fulcrum portion between the rotating shaft B and the dynamic contact will cooperate with the corresponding limiting portion to form the lever fulcrum of the contact piece when the linkage mechanism controls the contact support to continue to act, and then as long as the contact support continues to act, the end of the contact piece provided with the dynamic contact will be raised and disconnected from the corresponding static contact, so that the dynamic contact is switched from the closed state to the open state when the switch electric appliance is closed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1is a structure schematic view of the contact structure of the embodiment of the utility model closing.

[0018] Figure 2 is a structure schematic view of the contact structure of the embodiment of the utility model closing after breaking again in the closing process of the switch device.

[0019] Label explanation:

[0020] 1, moving contact, 2, static contact, 3, limiting portion, 11, contact support, 12, contact piece, 13, moving contact point, 14, fulcrum portion. Specific embodiment

[0021] The utility model is further described below in combination with the drawings and embodiments.

[0022] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0023] Please refer to the attached Figure 1 An embodiment of the utility model provides a kind of moving contact, including contact support 11, contact support 11 is configured to rotate around rotating shaft A, contact support 11 is rotatably connected with the contact piece 12 rotating around rotating shaft B, contact piece 12 is provided with with moving contact point 13, and contact piece 12 is provided with fulcrum portion 14 for forming lever rotating fulcrum structure on the portion between rotating shaft B and moving contact point 13.It can be understood that, in this embodiment, first, contact support 11 is configured to rotate around rotating shaft A, and can be controlled by linkage mechanism to act, then by being provided with the contact piece 12 rotating around rotating shaft B on contact support 11, setting fulcrum portion 14 on contact piece 12, when using, moving contact point 13 on contact piece 12 is more close to the end of contact piece 12 relative to fulcrum portion 14, so, when linkage mechanism controls contact support 11 to act in the closing direction, moving contact point 13 will be more first with corresponding static contact 2 and then, linkage mechanism controls contact support 11 to continue to act, and fulcrum portion 14 between rotating shaft B and moving contact point 13 will cooperate with corresponding limiting portion 3, so that fulcrum portion 14 forms the lever fulcrum of contact piece 12, then, as long as contact support 11 continues to act, the end of contact piece 12 provided with moving contact point 13 will be raised, and then be disconnected with corresponding static contact 2, to realize that moving contact is switched from closed state to disconnected state when switch device closing is completed.

[0024] Please refer to the attached Figure 1 , attachedFigure 2 In one preferred embodiment, an elastic reset member is arranged between the contact support 11 and the contact piece 12 for elastically contacting the movable contact 13.

[0025] Please refer to the accompanying drawings Figure 1 , the accompanying drawings Figure 2 In one preferred embodiment, the fulcrum portion 14 is a hemispherical contact structure. Preferably, the size of the fulcrum portion 14 is larger than the size of the movable contact 13. In this way, when the fulcrum portion 14 forms a lever fulcrum structure, the linkage mechanism will be easier to control the movable contact 13 on the contact piece 12 to break away from the corresponding stationary contact 2.

[0026] Please refer to the accompanying drawings Figure 1 In one embodiment of the utility model, a contact structure is also provided, which comprises the stationary contact 2 and the movable contact 1 as described above. In the installation space of the contact structure, a limiting portion 3 is fixedly arranged for contacting and cooperating with the fulcrum portion 14 on the movable contact 1. The contact structure is configured to be connected with the driving shaft of the switch electric appliance through the linkage mechanism. The rotation of the driving shaft drives the linkage mechanism to act and further drives the contact support 11 to rotate around the rotation axis A, so as to control the movable contact 1 to contact or break away from the corresponding stationary contact 2.

[0027] Please refer to the accompanying drawings Figure 1 , the accompanying drawings Figure 2 In one preferred embodiment, when the driving shaft rotates and the contact support 11 of the movable contact 1 is controlled to rotate by the linkage mechanism, the contact and cooperation between the movable contact 13 on the contact piece 12 and the stationary contact is configured to be prior to the contact and cooperation between the fulcrum portion 14 and the limiting portion 3. Then, the movable contact 1 continues to act under the driving of the linkage mechanism until the fulcrum portion 14 on the contact piece 12 contacts and cooperates with the limiting portion 3. At this time, the contact piece 12 forms a lever structure with the fulcrum portion 14 as the rotation fulcrum. When the linkage mechanism continues to drive the contact support 11 to act, the end of the contact piece 12 provided with the movable contact 13 will be raised and further break away from the stationary contact 2.

[0028] Please refer to the accompanying drawings Figure 1 , the accompanying drawings Figure 2 In one preferred embodiment, the limiting portion 3 is fixedly connected with the stationary contact 2. Preferably, at least one of the limiting portion 3 and the fulcrum portion 14 is a non-conductive structure.

[0029] Please refer to the accompanying drawings Figure 1 , the accompanying drawings Figure 2 In one embodiment of the utility model, a switch electric appliance is also provided, which comprises the movable contact or the contact structure as described above.

[0030] Please refer to the accompanying drawings Figure 1 , the accompanying drawingsFigure 2 In one preferred embodiment, the switchgear is a disconnector or a circuit breaker or other switchgear structure having arc extinction requirements.

[0031] The above is only used to illustrate the technical solutions of the present application, and is not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features therein can be replaced by equivalents; and these modifications or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, therefore, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

Claims

1. A moving contact, characterized by: The contact support (11) is configured to rotate around a rotating axis A, and a contact piece (12) is rotatably connected to the contact support (11) and rotates around a rotating axis B. The contact piece (12) is provided with a movable contact (13), and the contact piece (12) is provided with a fulcrum part (14) between the rotating axis B and the movable contact (13) to form a lever rotating fulcrum structure.

2. The movable contact according to claim 1, characterized in that: An elastic reset member is arranged between the contact support (11) and the contact piece (12) to elastically contact the movable contact (13).

3. The movable contact according to claim 1, characterized in that: The fulcrum part (14) is a hemispherical contact structure.

4. The movable contact according to claim 3, characterized in that: The size of the fulcrum part (14) is larger than the size of the movable contact (13).

5. A contact structure, characterized by: The contact structure comprises a movable contact (1) according to any one of claims 1 to 4 and a fixed contact (2) cooperating with the movable contact (1), wherein a limiting part (3) is fixedly arranged in a mounting space of the contact structure and is configured to contact the fulcrum part (14) on the movable contact (1), and the contact structure is configured to be connected to a driving shaft of a switch device through a linkage mechanism, and the linkage mechanism is driven to act by rotation of the driving shaft, thereby driving the contact support (11) to rotate around the rotating axis A, so as to control the movable contact (1) to contact or break away from the corresponding fixed contact (2).

6. The contact structure of claim 5, wherein: When the driving shaft rotates and the contact support (11) of the movable contact (1) is driven to rotate in a closing direction by the linkage mechanism, the contact of the movable contact (13) on the contact piece (12) with the fixed contact (2) is configured to be prior to the contact of the fulcrum part (14) with the limiting part (3), and then the movable contact (1) continues to act under the driving of the linkage mechanism until the fulcrum part (14) on the contact piece (12) contacts the limiting part (3), and the contact piece (12) forms a lever structure with the fulcrum part (14) as a rotating fulcrum, and when the linkage mechanism continues to drive the contact support (11) to act, the end of the contact piece (12) provided with the movable contact (13) is lifted to break away from the fixed contact (2).

7. The contact structure of claim 5, wherein: The limiting part (3) is fixedly connected with the fixed contact (2).

8. The contact structure of claim 7, wherein: At least one of the limiting part (3) and the fulcrum part (14) is a non-conductive structure.

9. A switchgear, characterized by: The switch device is a disconnector or a circuit breaker.

10. The switchgear according to claim 9, characterized in that: ​

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