A dual-power automatic transfer switch contact system

Abstract

This invention belongs to the field of electrical equipment technology, specifically relating to a dual-power automatic transfer switch contact system. It includes a housing and an operating lever movably disposed inside the housing. It also includes a standard stationary contact, a spare stationary contact, and a moving contact. The standard and spare stationary contacts are located on the same side inside the housing, and the moving contact is located between them, with the standard and spare stationary contacts positioned at opposite heights. Driven by the operating lever, the moving contact can make contact with one of the standard or spare stationary contacts. The standard and spare stationary contacts are located on the same side inside the housing, with the moving contact positioned between them. The operating lever is connected to a base via a connecting shaft, and its front end has a vertical rod fixed to the tail of the moving contact. This layout fully utilizes the internal space of the housing, reduces redundant space between components, and makes the entire contact system more compact.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology, and specifically relates to a dual-power automatic transfer switch contact system. Background Technology

[0002] Automatic transfer switches are a common type of low-voltage electrical appliance, often used for switching between two power sources to ensure that when one power source fails or stops supplying power, the other power source can be quickly switched to ensure normal power supply to the load circuit.

[0003] Existing dual-power automatic transfer switch contact systems have several shortcomings: First, during frequent switching operations, electric arcs are easily generated on the contacts. The high temperature of the arcs can cause oxidation and ablation of the contact surface, shortening the contact life and affecting the conductivity of the switch. Second, during switching, the contact pressure of the contacts in existing contact systems is difficult to maintain stably, which may lead to poor contact, increased contact resistance, excessive heat generation, and even safety accidents. Third, the structural design of the contact system is not compact enough, which is not conducive to the miniaturization and integration of dual-power automatic transfer switches. Therefore, an improved dual-power automatic transfer switch contact system was designed. Summary of the Invention

[0004] To address the aforementioned shortcomings in the existing technology, the present invention provides a dual-power automatic transfer switch contact system to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A dual-power automatic transfer switch contact system includes a housing and an operating lever movably disposed inside the housing;

[0007] It also includes a common stationary contact, a spare stationary contact, and a moving contact. The common stationary contact and the spare stationary contact are located on the same side inside the housing, and the moving contact is located between the common stationary contact and the spare stationary contact. The common stationary contact and the spare stationary contact are set at different heights. The moving contact can make contact with one of the common stationary contact and the spare stationary contact under the drive of the operating lever.

[0008] The housing includes an upper housing and a lower housing. Both the upper and lower housings are provided with connection holes. The commonly used stationary contact and the spare stationary contact are installed in the connection holes of the upper housing by means of springs. The moving contact is connected to the lower housing by means of springs.

[0009] The front end of the moving contact has two parallel connecting contact pieces, and the surface of the connecting contact pieces is provided with contact points that contact the commonly used stationary contact and the spare stationary contact.

[0010] A base is fixedly connected inside the outer casing. The front end of the operating lever is movably connected to the base. A vertical rod is connected to the bottom of the front end of the operating lever, and the vertical rod is fixedly connected to the tail of the moving contact.

[0011] The height of the commonly used stationary contact is higher than that of the spare stationary contact, and the moving contact is located between the commonly used stationary contact and the spare stationary contact.

[0012] The front end side wall of the operating lever is connected to a connecting shaft, and the base has a cavity to accommodate part of the operating lever. The inner wall of the cavity is provided with a shaft hole that matches the connecting shaft.

[0013] A through hole is provided at the bottom of the cavity for the vertical rod to pass through.

[0014] In the initial state, the contact point on the surface of the moving contact's connecting contact piece makes contact with the front end of the commonly used stationary contact, thus establishing electrical connection.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The commonly used stationary contact, spare stationary contact, moving contact, operating lever, and base are rationally arranged inside the housing. The commonly used stationary contact and spare stationary contact are located on the same side inside the housing, with the moving contact located between them. The operating lever is connected to the base via a connecting shaft, and the vertical rod at its front end is fixed to the tail of the moving contact. This layout makes full use of the internal space of the housing, reduces redundant space between components, and makes the entire contact system structure more compact.

[0017] 2. The commonly used stationary contact and the spare stationary contact are set at different high and low positions, with the moving contact located between them. During the switching process, the moving contact gradually disengages from the previously contacting stationary contact and moves towards the other stationary contact. This step-by-step switching method allows the current to be transferred gradually, avoiding the strong arc caused by the instantaneous interruption of current. This reduces the degree of oxidation and erosion of the contact surface by the arc, significantly extending the service life of the contact.

[0018] 3. The elastic force of the spring maintains a stable contact pressure between the stationary and moving contacts. Whether the moving contact is initially in contact with the commonly used stationary contact or after switching to the spare stationary contact, the spring automatically adjusts its elastic force according to the position change of the contacts, ensuring that the contact pressure is always within a reasonable range. This effectively avoids poor contact caused by unstable contact pressure, ensures stable conductivity of the switch, reduces increased contact resistance and heat generation, and lowers the risk of safety accidents. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the contact system of a dual-power automatic transfer switch according to the present invention;

[0020] Figure 2This is a disassembly and assembly diagram of a dual-power automatic transfer switch contact system according to the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of a dual-power automatic transfer switch contact system according to the present invention. Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the internal structure of a dual-power automatic transfer switch contact system according to the present invention. Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the internal structure of a dual-power automatic transfer switch contact system according to the present invention. Figure 3 ;

[0024] The reference numerals in the accompanying drawings include:

[0025] Housing (100), control lever (200)

[0026] Upper housing (101), connecting hole post (1011), lower housing (102), base (103), shaft hole (1031), common stationary contact (104), spare stationary contact (105), moving contact (106), connecting contact piece (1061), contact point (1062), mounting round hole (1063), spring (107), connecting shaft (201), vertical rod (202), hook-shaped clamping plate (203). Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0029] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Example 1:

[0032] like Figure 1-5 As shown, this invention provides a dual-power automatic transfer switch contact system, comprising a housing 100 and an operating lever 200 movably disposed inside the housing 100.

[0033] It also includes a common stationary contact 104, a spare stationary contact 105, and a moving contact 106. The common stationary contact 104 and the spare stationary contact 105 are located on the same side inside the housing 100. The moving contact 106 is located between the common stationary contact 104 and the spare stationary contact 105. The common stationary contact 104 and the spare stationary contact 105 are set at different heights. The moving contact 106 can make contact with one of the common stationary contact 104 and the spare stationary contact 105 respectively under the drive of the operating lever 200.

[0034] The outer casing 100 includes an upper casing 101 and a lower casing 102. Both the upper casing 101 and the lower casing 102 are provided with connecting holes 1011. A commonly used stationary contact 104 and a spare stationary contact 105 are installed in the connecting holes 1011 of the upper casing 101 by means of a spring 107. A moving contact 106 is connected to the lower casing 102 by means of a spring 107.

[0035] The front end of the moving contact 106 has two parallel connecting contact pieces 1061, and the surface of the connecting contact pieces 1061 is provided with contact points 1062 that contact the commonly used stationary contact 104 and the spare stationary contact 105.

[0036] A base 103 is fixedly connected inside the housing 100. The front end of the operating lever 200 is movably connected in the base 103. A vertical rod 202 is connected to the bottom of the front end of the operating lever 200. The vertical rod 202 is fixedly connected to the tail of the moving contact 106.

[0037] The height of the commonly used stationary contact 104 is higher than that of the spare stationary contact 105, and the moving contact 106 is located between the commonly used stationary contact 104 and the spare stationary contact 105.

[0038] The operating lever 200 has a connecting shaft 201 connected to its front end side wall. The base 103 has a cavity for accommodating part of the operating lever 200. The inner wall of the cavity has a shaft hole 1031 that is adapted to the connecting shaft 201.

[0039] A through hole is provided at the bottom of the cavity for the vertical rod 202 to pass through.

[0040] In the initial state, the contact point 1062 on the surface of the connecting contact piece 1061 of the moving contact 106 is in contact with the front end of the commonly used stationary contact 104 and conducts electricity. When the commonly used power supply fails, the operating lever 200 is lifted upward, and the operating lever 200 rotates around the connecting shaft 201. The front end of the operating lever 200 rotates downward, causing the vertical rod 202 to move downward, which in turn moves the moving contact 106 downward. The contact point 1062 on the surface of the connecting contact piece 1061 of the moving contact 106 is in contact with the spare stationary contact 105 and conducts electricity. At the same time, the moving contact 106 is disengaged from the commonly used stationary contact 104.

[0041] In the initial state, the contact point 1062 on the surface of the connecting contact piece 1061 of the moving contact 106 makes contact with the front end of the stationary contact 104, thus establishing electrical continuity. At this time, the mains power supply forms a conductive path with the load circuit through the stationary contact 104 and the moving contact 106, providing normal power to the load. The front end of the operating lever 200 is mounted in the shaft hole 1031 of the base 103 via the connecting shaft 201, and is in a relatively stable position. The vertical rod 202 also remains stationary. The moving contact 106 is in close contact with the stationary contact 104 under the action of the spring 107, ensuring stable contact pressure and good conductivity. When the mains power supply fails, the operating lever 200 needs to be manually or triggered by the control system. Lifting the operating lever 200 causes it to rotate around the connecting shaft 201 within the cavity of the base 103. Because the connecting shaft 201 is compatible with the shaft hole 1031, the rotation trajectory of the operating lever 200 is stable.

[0042] As the operating lever 200 rotates upward, the vertical rod 202 at its bottom moves downward. The vertical rod 202 is fixedly connected to the tail of the moving contact 106, thus causing the moving contact 106 to move downward. During this downward movement, the moving contact 106 gradually disengages from the commonly used stationary contact 104 and moves closer to the spare stationary contact 105. Because the commonly used stationary contact 104 is positioned higher than the spare stationary contact 105, the contact point 1062 on the surface of the connecting piece 1061 of the moving contact 106 accurately aligns with the spare stationary contact 105 as the moving contact 106 moves downward. When the moving contact 106 reaches contact with the spare stationary contact 105, their contacts fit tightly together, forming a new conductive path. The backup power supply then supplies power to the load through the spare stationary contact 105 and the moving contact 106, completing the power switching process. Throughout the switching process, the spring 107 consistently applies an elastic force to the stationary and moving contacts, ensuring stable contact pressure and reliable conductivity after switching.

[0043] The above are merely embodiments of the present invention. The circuits, electronic components, and modules involved are all prior art, fully achievable by those skilled in the art, and require no further explanation. The scope of protection in this application does not involve improvements to the software and methods. Commonly known structures and characteristics in the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all prior art in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A dual-power automatic transfer switch contact system, characterized in that: Includes a housing (100) and an operating lever (200) movably disposed inside the housing (100); It also includes a commonly used stationary contact (104), a spare stationary contact (105), and a moving contact (106). The commonly used stationary contact (104) and the spare stationary contact (105) are located on the same side inside the housing (100). The moving contact (106) is located between the commonly used stationary contact (104) and the spare stationary contact (105), and the commonly used stationary contact (104) and the spare stationary contact (105) are set at different heights. The moving contact (106) can interact with the commonly used stationary contact (104) and the spare stationary contact (105) respectively under the drive of the operating lever (200). 5) One of the contacts is connected. The housing (100) includes an upper housing (101) and a lower housing (102). Both the upper housing (101) and the lower housing (102) are provided with connecting holes (1011). The commonly used stationary contact (104) and the spare stationary contact (105) are installed in the connecting holes (1011) of the upper housing (101) by means of springs (107). The moving contact (106) is connected to the lower housing (102) by means of springs (107). The front end of the moving contact (106) has two parallel connecting contact pieces (1061). The surface of the contact piece (1061) is provided with a contact point (1062) that contacts the commonly used stationary contact (104) and the spare stationary contact (105). A base (103) is fixedly connected inside the housing (100). The front end of the operating lever (200) is movably connected in the base (103). A vertical rod (202) is connected to the bottom of the front end of the operating lever (200). The vertical rod (202) is fixedly connected to the tail of the moving contact (106). The commonly used stationary contact (104) is set at a higher height than the spare stationary contact (105). The moving contact (106) is positioned... Between the commonly used stationary contact (104) and the spare stationary contact (105), a connecting shaft (201) is connected to the front side wall of the operating rod (200). The base (103) has a cavity to accommodate part of the operating rod (200). The inner wall of the cavity is provided with a shaft hole (1031) that is compatible with the connecting shaft (201). The bottom of the cavity has a through hole for the vertical rod (202) to pass through. In the initial state, the contact point (1062) on the surface of the connecting contact piece (1061) of the moving contact (106) is in contact with the front end of the commonly used stationary contact (104) and conducts electricity.

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