Contact system of dual-power automatic change-over switch

Abstract

The invention belongs to the technical field of electrical equipment, and particularly relates to a dual-power automatic change-over switch contact system which comprises a shell and an operating rod movably arranged in the shell. The switch further comprises a common static contact, a standby static contact and a moving contact, the common static contact and the standby static contact are arranged on the same side in the shell, the moving contact is arranged between the common static contact and the standby static contact, and the common static contact and the standby static contact are arranged in a high-low mode. And the moving contact can be respectively contacted and conducted with one of the common static contact and the standby static contact under the driving of the operating rod. The common static contact and the standby static contact are arranged on the same side in the shell, the moving contact is located between the common static contact and the standby static contact, the operating rod is connected with the base through the connecting shaft, and a vertical rod at the bottom of the front end of the operating rod is fixed to the tail of the moving contact. According to the layout mode, the internal space of the shell is fully utilized, redundant space among components is reduced, and the whole contact system is more compact in structure.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment, and in particular relates to a dual-power automatic transfer switch contact system. Background Art

[0002] Automatic transfer switch is a commonly used low-voltage electrical appliance, which is often used to switch 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 of the load circuit.

[0003] The existing dual power automatic transfer switch contact system has some shortcomings: first, the contacts are prone to arcing during frequent on-off operations. The high temperature of the arc will cause oxidation and ablation of the contact surface, shortening the service life of the contact and affecting the conductive performance of the switch; second, during the switching process of the existing contact system, the contact pressure of the contacts is difficult to maintain stable, and poor contact may occur, resulting in 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 development of the dual power automatic transfer switch. For this reason, an improved dual power automatic transfer switch contact system is designed. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a dual power automatic transfer switch contact system to solve the above-mentioned problems in the background technology.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A dual power automatic transfer switch contact system comprises a housing and an operating rod movably arranged inside the housing; It also includes a common static contact, a spare static contact and a moving contact, wherein the common static contact and the spare static contact are arranged on the same side inside the shell, the moving contact is arranged between the common static contact and the spare static contact, and the common static contact and the spare static contact are arranged one high and one low. Under the drive of the operating lever, the moving contact can be respectively contacted and connected with one of the common static contact and the spare static contact.

[0006] The housing includes an upper shell and a lower shell. Both the upper shell and the lower shell are provided with connecting hole columns. The common static contact and the spare static contact are installed in the connecting hole columns of the upper shell through springs, and the moving contact is connected to the lower shell through a spring.

[0007] The front end of the moving contact is provided with two parallel connecting contact pieces, and the surfaces of the connecting contact pieces are provided with contact points that are in contact with the common static contact and the spare static contact.

[0008] The housing is fixedly connected to a base, the front end of the operating rod is movably connected to the base, the front end bottom of the operating rod is connected to a vertical rod, and the vertical rod is fixedly connected to the tail of the moving contact.

[0009] The common static contact is arranged at a height higher than the spare static contact, and the moving contact is located between the common static contact and the spare static contact.

[0010] The front end side wall of the operating rod is connected with a connecting shaft, the base is provided with a cavity for accommodating part of the operating rod, and the inner wall of the cavity is provided with an axis hole adapted to the connecting shaft.

[0011] The bottom of the cavity is provided with a through hole for the vertical rod to pass through.

[0012] In the initial state, the contact point on the surface of the connecting contact piece of the moving contact is in contact with the front end of the common static contact and is connected.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The housing rationally arranges the common static contacts, spare static contacts, moving contacts, operating lever, and base. The common static contacts and spare static contacts are located on the same side of 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 the bottom of its front end is fixed to the rear end of the moving contact. This layout fully utilizes the housing's internal space, reduces redundant space between components, and makes the entire contact system more compact. 2. The common static contact and the spare static contact are arranged one high and one low, with the moving contact located between them. During the switching process, the moving contact gradually separates from the static contact it was previously in contact with while simultaneously moving toward the other static contact. This step-by-step switching method allows for gradual current transfer, avoiding the strong arcs generated by momentary current interruptions. This in turn reduces the degree of arc oxidation and ablation on the contact surface, significantly extending the contact's service life.

[0014] 3. The spring's elastic force maintains stable contact pressure between the static and moving contacts. Whether the moving contact is initially in contact with the primary static contact or with the backup static contact after switching, the spring automatically adjusts its force based on the changing contact positions, ensuring that contact pressure remains within a reasonable range. This effectively avoids poor contact caused by unstable contact pressure, ensures stable switch conductivity, minimizes increased contact resistance and heat generation, and reduces the risk of safety incidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a dual power automatic transfer switch contact system of the present invention; Figure 2 This is a disassembly diagram of a dual power automatic transfer switch contact system of the present invention; Figure 3An internal structure diagram of a contact system of a dual power automatic transfer switch of the present application Figure 1 ; Figure 4 An internal structure diagram of a contact system of a dual power automatic transfer switch of the present application Figure 2 ; Figure 5 An internal structure diagram of a contact system of a dual power automatic transfer switch of the present application Figure 3 ; The reference signs in the drawings of the specification include: a housing (100), an operating rod (200), an upper shell (101), a connecting hole column (1011), a lower shell (102), a base (103), a shaft hole (1031), a normal static contact (104), a standby static contact (105), a moving contact (106), a connecting contact sheet (1061), a contact (1062), a mounting circular hole (1063), a spring (107), a connecting shaft (201), a vertical rod (202), a hook-shaped clamping plate (203). DETAILED DESCRIPTION

[0016] In order for those skilled in the art to better understand the present application, the technical solutions of the present application are further described below in combination with the drawings and examples.

[0017] Among them, the drawings are only used for exemplary illustration, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the present patent; in order to better illustrate the embodiments of the present application, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0018] The same or similar reference signs in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it is understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application 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, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0019] In the description of the present application, unless otherwise explicitly specified and limited, if the term "connection" and the like appear to indicate the connection relationship between components, the term should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0020] Embodiment one: As shown in the present application, specifically, a dual power automatic transfer switch contact system comprises a shell 100 and an operating rod 200 movably arranged inside the shell 100; Figures 1-5 It also comprises a normal static contact 104, a backup static contact 105 and a moving contact 106, wherein the normal static contact 104 and the backup static contact 105 are arranged on the same side inside the shell 100, the moving contact 106 is arranged between the normal static contact 104 and the backup static contact 105, and the normal static contact 104 and the backup static contact 105 are arranged high and low, and the moving contact 106 can be in contact and conductive with one of the normal static contact 104 and the backup static contact 105 under the driving of the operating rod 200. The shell 100 comprises an upper shell 101 and a lower shell 102, and connecting hole columns 1011 are arranged on the upper shell 101 and the lower shell 102, the normal static contact 104 and the backup static contact 105 are installed in the connecting hole columns 1011 of the upper shell 101 through springs 107, and the moving contact 106 is connected with the lower shell 102 through the springs 107.

[0021] The front end of the moving contact 106 has two parallel connecting contact pads 1061, and the surface of the connecting contact pad 1061 is provided with a contact point 1062 in contact with the normal static contact 104 and the backup static contact 105.

[0022] The inside of the shell 100 is fixedly connected with a base 103, the front end of the operating rod 200 is movably connected in the base 103, the front end of the operating rod 200 is connected with a vertical rod 202, and the vertical rod 202 is fixedly connected with the tail of the moving contact 106.

[0023] The normal static contact 104 is arranged higher than the backup static contact 105, and the moving contact 106 is located between the normal static contact 104 and the backup static contact 105.

[0024] The front end side wall of the operating rod 200 is connected with a connecting shaft 201, the base 103 is provided with a cavity accommodating part of the operating rod 200, and the inner wall of the cavity is provided with a shaft hole 1031 matched with the connecting shaft 201.

[0025] ​

[0026] The bottom of the cavity is provided with a through hole for the vertical rod 202 to pass through.

[0027] In the initial state, the contact 1062 on the surface of the connecting tab 1061 of the movable contact 106 is in contact with the front end of the normal static contact 104. When the normal power supply fails, the operating rod 200 is lifted upward, the operating rod 200 rotates around the connecting shaft 201, the front end of the operating rod 200 rotates downward, the vertical rod 202 moves downward, and the movable contact 106 moves downward, so that the contact 1062 on the surface of the connecting tab 1061 of the movable contact 106 is in contact with the standby static contact 105, and the movable contact 106 is separated from the normal static contact 104.

[0028] In the initial state, the contact 1062 on the surface of the connecting tab 1061 of the movable contact 106 is in contact with the front end of the normal static contact 104. At this time, the normal power supply forms a conductive path through the normal static contact 104, the movable contact 106, and the load circuit, and normally supplies power to the load. The front end of the operating rod 200 is installed in the shaft hole 1031 of the base 103 through the connecting shaft 201, and is in a relatively stable position, and the vertical rod 202 also remains in a static state. The movable contact 106 is in close contact with the normal static contact 104 under the action of the spring 107, ensuring stable contact pressure and good conductivity. When the normal power supply fails, the operating rod 200 needs to be manually or triggered by a control system. The operating rod 200 is lifted upward, and the operating rod 200 rotates in the cavity of the base 103 around the connecting shaft 201. Since the connecting shaft 201 is matched with the shaft hole 1031, the rotating track of the operating rod 200 is stable.

[0029] As the front end of the operating rod 200 rotates upward, the vertical rod 202 at the bottom of the front end moves downward. The vertical rod 202 is fixedly connected to the tail of the movable contact 106, so as to drive the movable contact 106 to move downward. During the downward movement of the movable contact 106, the movable contact 106 gradually separates from the normal static contact 104 and approaches the standby static contact 105. Since the normal static contact 104 is set to be higher than the standby static contact 105, when the movable contact 106 moves downward, the contact 1062 on the surface of the connecting tab 1061 will accurately approach the standby static contact 105. When the movable contact 106 moves to contact the standby static contact 105, the contacts of the two are in close contact, forming a new conductive path, and the standby power supply supplies power to the load through the standby static contact 105 and the movable contact 106, completing the switching process of the power supply. During the entire switching process, the spring 107 always applies an elastic force to the static contact and the movable contact, ensuring the stability of the contact pressure and the reliability of the conductivity after switching.

[0030] The above is only an embodiment of the present application, and relates to circuits and electronic components and modules, which are all prior art. Those skilled in the art can implement the present application without further description. The present application does not involve improvement of software and methods. Commonly known specific structures and characteristics in the scheme are not described in detail herein. Those skilled in the art know all common technical knowledge in the technical field of the present application before the filing date or the priority date, can know all prior art in the field, and have the ability to apply conventional experimental means before the date. Those skilled in the art can perfect and implement the present scheme based on their own ability under the guidance of the present application. Some typical known structures or known methods should not be an obstacle for those skilled in the art to implement the present application. It should be pointed out that, for those skilled in the art, a number of modifications and improvements can be made without departing from the structure of the present application. These should also be considered as the protection scope of the present application, and these will not affect the implementation effect and practicality of the patent.

Claims

1. A dual power automatic transfer switch contact system, characterized by: It comprises a housing (100) and an operating rod (200) movably arranged inside the housing (100); The utility model further comprises a common static contact (104), a spare static contact (105) and a moving contact (106), wherein the common static contact (104) and the spare static contact (105) are arranged on the same side inside the housing (100), the moving contact (106) is arranged between the common static contact (104) and the spare static contact (105), and the common static contact (104) and the spare static contact (105) are arranged one high and one low, and the moving contact (106) can be respectively contacted and conducted with one of the common static contact (104) and the spare static contact (105) under the driving of the operating rod (200).

2. A dual power automatic transfer switch contact system according to claim 1, characterized in that: The housing (100) comprises an upper housing (101) and a lower housing (102), wherein both the upper housing (101) and the lower housing (102) are provided with a connecting hole column (1011), a common static contact (104) and a spare static contact (105) are installed in the connecting hole column (1011) of the upper housing (101) via a spring (107), and the moving contact (106) is connected to the lower housing (102) via the spring (107).

3. A dual power automatic transfer switch contact system as claimed in claim 2, characterized in that: The front end of the moving contact (106) is provided with two parallel connecting contact pieces (1061), and the surface of the connecting contact piece (1061) is provided with contact points (1062) that contact the common static contact (104) and the spare static contact (105).

4. A dual power automatic transfer switch contact system as claimed in claim 3, characterized in that: The housing (100) is fixedly connected to a base (103), the front end of the operating rod (200) is movably connected to the base (103), the front end bottom of the operating rod (200) is connected to a vertical rod (202), and the vertical rod (202) is fixedly connected to the tail of the moving contact (106).

5. A dual power automatic transfer switch contact system as claimed in claim 4, characterized in that: The common static contact (104) is arranged at a height higher than the spare static contact (105), and the movable contact (106) is located between the common static contact (104) and the spare static contact (105).

6. A dual power automatic transfer switch contact system as claimed in claim 5, characterized in that: The front end side wall of the operating rod (200) is connected to a connecting shaft (201), and the base (103) is provided with a cavity for accommodating part of the operating rod (200), and the inner wall of the cavity is provided with an axis hole (1031) adapted to the connecting shaft (201).

7. A dual power automatic transfer switch contact system as claimed in claim 6, characterized in that: A through hole for the vertical rod (202) to pass through is provided at the bottom of the cavity.

8. A dual power automatic transfer switch contact system according to claim 7, characterized in that: 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 common static contact (104) and is connected.

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