Contact assembly with pressure provided by spring piece and used for dual-power change-over switch

Abstract

The invention relates to a contact assembly for providing pressure for a spring piece for a dual-power change-over switch, which comprises a first power supply static contact, a second power supply static contact, a load static contact and a moving contact assembly, the first power supply static contact, the second power supply static contact, the load static contact and the moving contact assembly are arranged between a base and a cover, and the moving contact assembly can rotate between the base and the cover and has three positions: a first power supply closing position, a full-open position and a second power supply closing position; the moving contact assembly is based on a rotating shaft and comprises a first moving contact assembly and a second moving contact assembly which are installed on the rotating shaft, each moving contact assembly comprises two moving contact rotating shafts, spring pieces are arranged on moving contacts, and contact pressure is provided through the spring pieces; the structure of the moving contact assembly is of a plug-in type, and the moving contact assembly can bear large short-time withstand current.

Description

Technical Field

[0001] The subject matter disclosed in the present invention relates to an apparatus belonging to an electrical system, and more particularly to a dual power conversion switch apparatus. Background Art

[0002] The contact is an important component of the dual power conversion switch electrical appliance. It has the functions of opening and closing circuits and carrying current. It is generally composed of moving and static contacts. In order to ensure reliable contact between the moving and static contacts, elastic parts need to be designed to ensure contact pressure. Common elastic parts include spring sheets, tension springs, compression springs, etc. Plug-in contacts generally use tension spring sheets, which are difficult to assemble and difficult to ensure contact pressure parameters. Based on the above problems, a plug-in contact for a dual power conversion switch is provided, which has a contact pressure provided by a spring sheet, is small in size, and has good assembly processability, which has important practical significance.

[0003] The contacts of the dual power transfer switch are the executive components of the automatic transfer switch to complete the power conversion during automatic or manual conversion. They need to complete the operating current of the disconnected line and withstand large fault current shocks; the first power supply and the second power supply each have independent arc extinguishing chambers to avoid the risk of short circuit between the two power supplies. Summary of the invention

[0004] The present invention provides a plug-in contact structure of a dual power conversion switch for contact connection and disconnection, which solves the above problem.

[0005] The present invention is realized by the following technical scheme: a first power static contact, a second power static contact, a load static contact, and a moving contact assembly are arranged between the base and the cover.

[0006] The moving contact assembly is based on a rotating shaft, and the moving contact is installed on the rotating shaft. Each moving contact is equipped with a spring sheet, and the spring sheet provides contact pressure.

[0007] There are circular holes in the center of the base and the cover respectively. The two circular holes provide the rotation center for the rotating shaft in the moving contact assembly. The moving contact assembly can rotate clockwise or counterclockwise.

[0008] Preferably, one end of the moving contact in the first moving contact assembly is in contact with the load static contact, and the friction force at this point is close to the center of rotation. Therefore, the reaction torque at this point is relatively small. When closing or opening the switch, it is sufficient to overcome the torque generated by the friction force between the first moving contact assembly and the first static contact.

[0009] Preferably, one end of the moving contact in the second moving contact assembly is in contact with the load static contact, and the friction force at this point is close to the center of rotation. Therefore, the reaction torque at this point is relatively small. When closing or opening the switch, it is sufficient to overcome the torque generated by the friction force between the second moving contact assembly and the second static contact.

[0010] Preferably, the load static contact is fixed as a whole between the base and the cover and is relatively stationary, and the contact ends of the load static contact correspond to the first power static contact and the second power static contact respectively; when the moving contact assembly rotates, the first moving contact assembly connects the first power static contact and the contact end of the load static contact, that is, the first power is connected.

[0011] Preferably, when the moving contact assembly rotates, the second moving contact assembly connects the second power static contact and the contact end of the load static contact, that is, the second power supply is connected.

[0012] Preferably, one end of the rotating shaft is provided with a cross protrusion and the other end is a cross recess, and these two ends are used to connect the contact components of the multi-pole dual power conversion switch to realize the multi-pole power supply conversion of the dual power conversion switch.

[0013] The first moving contact assembly and the second moving contact assembly of the present invention are each a group, which meets the design requirement of mechanically avoiding short circuit between power sources.

[0014] The first contact assembly and the second contact assembly of the present invention each have two moving contacts, and the moving contact assembly and the stationary contact are in an inserted structure, which has the characteristic of being able to withstand a large short-circuit current. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : A schematic diagram of the structure of the implementation of the present invention;

[0016] Figure 2 : Schematic diagram of the second power supply closing structure;

[0017] Figure 3 : Schematic diagram of moving contact assembly and load static contact;

[0018] Figure 4 : Explosion schematic diagram of the present invention;

[0019] Figure 5 : Schematic diagram of the moving contact assembly of the present invention

[0020] List of illustrated symbols: first static contact 1, second power static contact 2, load static contact 3, rotating shaft 4, moving contact 5, moving contact fixing groove 6, base 7, spring sheet 8, cover 9, round hole on cover 10, round hole on base 11, moving contact assembly 12, moving contact mounting groove 13, spring sheet fixing groove 14, cross recess 40, cross protrusion 41, moving contact middle protrusion 50, moving contact contact point 51, first moving contact assembly 101, second moving contact assembly 201. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 and Figure 4 As shown: the contact assembly of the dual power conversion switch includes a base 7 and a cover 9, in which a first power static contact 1, a second power static contact 2, a load static contact 3, and a moving contact assembly 12 are installed, wherein the moving contact assembly 12 can rotate between the base 7 and the cover 9.

[0026] like Figure 5 As shown, the moving contact assembly 12 is composed of a rotating shaft 7, a first moving contact assembly 101 and a second moving contact assembly 201. The first moving contact assembly 101 and the second moving contact assembly 201 are both composed of two moving contacts 5 and two spring sheets 8, and the contact pressure is provided by the spring sheets 8.

[0027] like Figure 4 As shown: the base 7 and the cover 9 are respectively provided with a base hole 11 and a cover hole 10 in the center. These two circular holes provide a rotation center for the rotating shaft 4 in the moving contact assembly 12. The moving contact assembly 12 can rotate clockwise or counterclockwise.

[0028] like Figure 1 and Figure 4As shown: the load static contact 3 is fixed as a whole between the base and the cover and is relatively fixed. The load static contact 3 extends into the moving contact assembly 12. There is a contact end on the load static contact 3, and the contact end contacts the first moving contact assembly 101 and the second moving contact assembly 201.

[0029] like Figure 1 As shown: when the moving contact assembly 12 rotates, the first moving contact assembly 101 is connected to the contact ends on the first power static contact 1 and the load static contact 3 respectively, that is, the first power is connected.

[0030] like Figure 2 As shown, as shown: when the moving contact assembly 12 rotates, the second moving contact assembly 201 is connected to the contact ends on the second power static contact 2 and the load static contact 3 respectively, that is, the second power supply is connected.

[0031] like Figure 4 As shown: when the moving contact assembly 12 rotates, the first moving contact assembly 101 is disconnected from the first power static contact 1, and the second moving contact assembly 201 is disconnected from the second power static contact 2, that is, the dual power conversion switch is in a fully disconnected state.

[0032] like Figure 4 and Figure 5 As shown: one end of the rotating shaft 7 is provided with a cross protrusion 41 and the other end is a cross recess 40, and these two ends are used for connecting the contact components of the multi-pole dual power conversion switch to realize the multi-pole power supply conversion of the dual power conversion switch.

[0033] like Figure 4 and Figure 5 As shown, the rotating shaft 4 is provided with a moving contact mounting groove 13, a moving contact fixing groove 6 and a spring piece fixing groove 6; the moving contact 5 is installed in the moving contact mounting groove 13, and the middle protrusion 50 of the moving contact is embedded in the moving contact fixing groove 6; the spring piece 8 is also installed in the moving contact mounting groove 13, and the head of the spring piece 8 is stuck in the spring piece fixing groove 14, which can stabilize the spring piece 8.

[0034] Both ends of the moving contact 5 have moving contact points 51, which are used to connect and disconnect the circuit. During the operation of the circuit, it has the characteristic of being able to withstand large short-circuit current.

[0035] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A contact assembly for providing pressure with a spring sheet for a dual power conversion switch, characterized in that: include: A first power static contact, a second power static contact, a load static contact, and a moving contact assembly are arranged between the base and the cover, wherein the moving contact assembly can rotate between the base and the cover.

2. The contact assembly for providing pressure with a spring sheet for a dual power conversion switch according to claim 1, characterized in that: The moving contact assembly is based on a rotating shaft, and a first moving contact assembly and a second moving contact assembly are mounted on the rotating shaft. Each assembly comprises two moving contacts, and each moving contact is provided with pressure by a spring sheet.

3. The contact assembly with spring sheet providing pressure for dual power conversion switch according to claim 1, characterized in that: The load static contact is fixed between the base and the cover and is relatively immovable. The load static contact extends into the moving contact assembly. There is a contact end on the load static contact, and the contact end contacts the first moving contact assembly and the second moving contact assembly.

4. The dual power conversion switch contact assembly according to claim 3, characterized in that: When the moving contact assembly can rotate clockwise or counterclockwise, when the first moving contact assembly rotates, the first power static contact and the load static contact contact end are respectively connected, that is, the first power is connected; when the second moving contact assembly rotates, the second power static contact and the load static contact contact end are respectively connected, that is, the second power is connected.

5. One end of the rotating shaft is provided with a cross convex groove and the other end is a cross concave groove. These two ends are used to connect the contact components of the multi-pole dual power conversion switch to realize the multi-pole power supply conversion of the dual power conversion switch.

6. One end of the rotating shaft is provided with a cross convex groove and the other end is a cross concave groove. These two ends are used to connect the contact components of the multi-pole dual power conversion switch to realize the multi-pole power supply conversion of the dual power conversion switch.

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