High-voltage relay structure

Abstract

The utility model relates to a relay structure. A high-voltage relay structure comprises a matched shell, a static contact piece and a movable contact piece are arranged in the shell, the movable contact piece is connected with a push rod through a spring, the push rod comprises an upper push rod body and a lower push rod body, the upper push rod body and the lower push rod body are connected through an insulating piece, one end of the upper push rod body penetrates through a through hole in the movable contact piece, and the spring is connected to the upper push rod body in a sleeved mode. One end of the spring abuts against the movable contact piece, and the other end of the spring abuts against the upper end face of the insulating piece. The lower push rod is located in a through hole in the center of the iron core. The utility model provides a high-voltage relay structure which is simple in structure, convenient to assemble and capable of ensuring the use performance of a relay and improving the safety. The high-voltage relay solves the technical problems that a coil of a high-voltage relay in the prior art is easy to break down to cause use failure, and the assembly structure of the existing high-voltage relay is complex.

Description

Technical Field

[0001] The utility model relates to a relay structure, in particular to a high-voltage relay structure. Background Art

[0002] A high-voltage relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. A high-voltage relay is an electrical device that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity (excitation quantity) of the high-voltage circuit reaches the specified requirements.

[0003] Relays are commonly used components in control circuits. They change the controlled quantity in the circuit by changing the input quantity, thereby achieving the purpose of automatic control and regulation. They are widely used in power electronic equipment, especially in the control field of high-voltage circuits. Relays undertake important execution tasks. Through the isolated operation of the working coil, the high-voltage circuit can be closed and cut off. Their working performance is related to the safe use of the high-voltage circuit, so they need to have good current cutting capability and overload performance.

[0004] Today's high-voltage relays usually include a shell with a push rod inside the shell. The push rod is usually connected to a high voltage, 450V, 750V or even 1000V. However, the push rod is located inside an iron core, and a coil is wrapped outside the iron core. The voltage of the coil is basically around 12V. Therefore, the high voltage of the push rod can easily break down the coil outside the iron core, causing the coil to fail and affecting the use of the entire relay. Summary of the invention

[0005] The utility model provides a high-voltage relay structure with a simple structure and convenient assembly, which can ensure the performance of the relay and improve safety; it solves the technical problems in the prior art that the coil of the high-voltage relay is easily broken down, resulting in failure in use, and the assembly structure of the existing high-voltage relay is complicated.

[0006] The above technical problems of the utility model are solved by the following technical solutions: a high-voltage relay structure, including a housing, a static contact and a moving contact are arranged in the housing, the moving contact is connected to a push rod through a spring, the push rod includes an upper push rod and a lower push rod, the upper push rod and the lower push rod are connected through an insulating member, one end of the upper push rod passes through a through hole on the moving contact, the spring is sleeved on the upper push rod, one end of the spring abuts on the moving contact, and the other end of the spring abuts on the upper end surface of the insulating member; the lower push rod is located in the through hole in the center of the iron core. The upper push rod and the lower push rod are connected to different voltages respectively, and the two are connected by an insulating member, so that the voltages of the upper push rod and the lower push rod will not affect each other, reducing the risk of the coil being broken down and improving the safety of the relay. At the same time, the spring is directly sleeved on the upper push rod and connected to the moving contact, which is convenient to install and can be installed in sequence.

[0007] Preferably, the upper end of the upper push rod is provided with an annular upper clamping groove, which is clamped on the edge of the through hole of the movable contact. When the upper push rod moves downward, the upper clamping groove abuts against the edge of the through hole of the movable contact, driving the movable contact to move synchronously.

[0008] Preferably, the lower end of the lower push rod is provided with an annular lower clamping groove, which is clamped on the edge of the through hole in the center of the iron core. When the lower push rod moves upward, the lower clamping groove abuts against the edge of the through hole in the iron core, driving the iron core to move upward with the movement of the lower push rod.

[0009] Preferably, an upper end surface of the insulating member is provided with an upper connecting groove fixedly connected to an upper push rod, and an end of the upper push rod is provided with an upper protrusion matched with the upper connecting groove.

[0010] Preferably, the upper end surface of the insulating member is provided with a lower connecting groove fixedly connected to the upper push rod, and the end of the lower push rod is provided with a lower protrusion matching with the lower connecting groove.

[0011] Upper and lower connecting grooves are arranged on the insulating member to respectively install the upper and lower push rods, and the upper connecting groove and the lower connecting groove are not connected, so that the upper push rod and the lower push rod are isolated by the insulating member, and at the same time, the upper push rod and the lower push rod are conveniently on the same axis, which is convenient for installation.

[0012] Preferably, a support plate is provided in the middle of the housing, a plastic arc-extinguishing contact box is provided above the support plate, a hollow through hole is provided in the center of the plastic arc-extinguishing contact box, and the upper push rod and the spring are located in the through hole. The upper push rod and the spring are installed in the through hole of the plastic arc-extinguishing contact box, and the spring and the upper push rod can be installed by pressing the moving contact. The installation is convenient and quick.

[0013] Preferably, the insulating member is located on the support plate, a through hole is provided at the center of the support plate, and the lower push rod passes through the through hole and is connected to the iron core.

[0014] Preferably, the upper push rod, the insulating member and the lower push rod are on the same axis.

[0015] Preferably, the upper push rod and the lower push rod are metal push rods, and the insulating member is a plastic insulating member.

[0016] Therefore, a high-voltage relay structure of the utility model has the following advantages: the upper push rod and the lower push rod are divided by an insulating member, which effectively prevents the coil from being broken down and ensures the safety of the relay; the various components are installed in a superimposed manner, which is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the structure of a high-voltage relay.

[0018] Figure 2 yes Figure 1 sectional view of .

[0019] Figure 3 yes Figure 1 A three-dimensional diagram of the coordination of the inner moving contact, push rod and iron core. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0021] Example:

[0022] like Figure 1 and 2 As shown in Figure 3, a high-voltage relay structure includes a housing 1, and a yoke iron plate 13 is installed at the center of the housing 1. The yoke iron plate 13 divides the space in the housing into an upper cavity and a lower cavity. A coaxially arranged coil 6 and an iron core 5 are installed in the lower cavity. A plastic arc-extinguishing contact box 4 is installed in the upper cavity, and the plastic arc-extinguishing contact box 4 is located above the yoke iron plate 13. A moving contact 3 is provided above the plastic arc-extinguishing contact box 4, and two static contacts are also installed on the housing 1, and there are two static contacts 2, which are located above the moving contact 3.

[0023] An upper through hole is provided at the center of the plastic arc-extinguishing contact box 4, and a lower through hole is also provided at the center of the iron core below, and the upper through hole and the lower through hole are coaxial. A metal upper push rod 7 is installed in the upper through hole, and a metal lower push rod 10 is installed in the lower through hole. The metal upper push rod 7 and the metal lower push rod 10 are connected through a plastic insulating member 9, and an upper connecting groove and a lower connecting groove are respectively provided on the upper and lower end surfaces of the plastic insulating member 9. An upper protrusion matching the upper connecting groove is provided at the end of the metal upper push rod 7, and a lower protrusion matching the lower connecting groove is provided at the end of the metal lower push rod 10.

[0024] A spring 8 is sleeved on the metal upper push rod 7, and the spring 8 is located in the through hole. The upper end of the metal upper push rod 7 is provided with an annular upper clamping groove 11, and the upper end of the metal upper push rod 7 passes through the movable contact 3, and the upper clamping groove is clamped on the edge of the through hole of the movable contact. The lower end of the metal lower push rod 10 is provided with an annular lower clamping groove 12, and the lower clamping groove 12 is clamped on the edge of the through hole in the center of the iron core. When the upper and lower push rods move up and down, the movable contact 3 and the iron core 5 will be driven to move up and down.

[0025] The specific embodiments described herein are merely examples of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A high voltage relay structure, comprising a housing, wherein a stationary contact and a moving contact are arranged in the housing, characterized in that: The moving contact is connected to a push rod via a spring, and the push rod includes an upper push rod and a lower push rod, which are connected via an insulating member, one end of the upper push rod passes through a through hole on the moving contact, the spring is sleeved on the upper push rod, one end of the spring abuts against the moving contact, and the other end of the spring abuts against the upper end surface of the insulating member; the lower push rod is located in the through hole in the center of the iron core.

2. A high voltage relay structure according to claim 1, characterized in that: The upper end of the upper push rod is provided with an annular upper clamping groove, and the upper clamping groove is clamped on the edge of the through hole of the movable contact piece.

3. A high voltage relay structure according to claim 1, characterized in that: The lower end of the lower push rod is provided with an annular lower clamping groove, and the lower clamping groove is clamped on the edge of the through hole in the center of the iron core.

4. A high voltage relay structure according to claim 1, 2 or 3, characterized in that: An upper end surface of the insulating member is provided with an upper connecting groove fixedly connected to an upper push rod, and an end of the upper push rod is provided with an upper protrusion matched with the upper connecting groove.

5. A high voltage relay structure according to claim 1, 2 or 3, characterized in that: The upper end surface of the insulating member is provided with a lower connecting groove fixedly connected to the upper push rod, and the end of the lower push rod is provided with a lower protrusion matched with the lower connecting groove.

6. A high voltage relay structure according to claim 1, 2 or 3, characterized in that: A support plate is provided in the middle of the shell, a plastic arc-extinguishing contact box is provided above the support plate, a hollow through hole is opened in the center of the plastic arc-extinguishing contact box, and an upper push rod and a spring are located in the through hole.

7. A high voltage relay structure according to claim 6, characterized in that: The insulating member is located on the support plate, a through hole is opened in the center of the support plate, and the lower push rod passes through the through hole and is connected to the iron core.

8. A high voltage relay structure according to claim 1, 2 or 3, characterized in that: The upper push rod, the insulating member and the lower push rod are on the same axis.

9. A high voltage relay structure according to claim 1, 2 or 3, characterized in that: The upper push rod and the lower push rod are metal push rods, and the insulating part is a plastic insulating part.

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