Driving structure for DC relay

Abstract

The utility model relates to a driving structure for a DC relay, the driving structure comprising a moving spring, an elastic member and a driving assembly, one end of the elastic member abuts against the moving spring, and the other end of the elastic member abuts against a part of the driving assembly; the driving structure also comprises an arc-extinguishing stopper, the arc-extinguishing stopper has a plurality of first protrusions, the arc-extinguishing stopper is connected to another part of the driving assembly, so that the moving spring is subjected to the force of the elastic member and abuts against the arc-extinguishing stopper. The utility model increases the arc-extinguishing stopper, and the arc-extinguishing stopper has a plurality of first protrusions, each of which is arranged along the length or non-length direction of the stopper body, so that the arc-extinguishing effect under extreme working conditions can be improved. Chamfers are arranged at both ends of the metal part, which has a guiding effect, and a bending portion is arranged at one end of the fixed plate away from the insulating seat, so that the assembly of the arc-extinguishing stopper and the fixed plate is facilitated by the bending portion, thereby improving the assembly efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a driving structure suitable for high-voltage direct current relays. Background Art

[0002] A 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. It is an "automatic switch" that uses a smaller current to control a larger current. It plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] A DC relay is a type of relay. A Chinese patent with publication number CN105551897B discloses a high-voltage DC relay and an assembly method thereof, which includes two stationary contacts and a moving assembly; the moving assembly includes a moving spring part, a main spring and a push rod assembly; the push rod assembly is composed of two independent parts, a push rod part and a U-shaped basket. However, the above structure has the following problems:

[0004] (1) During the assembly of the U-shaped basket, one side of the U-shaped basket needs to be clamped with one end of the fixing plate first, and then the other side of the U-shaped basket needs to be clamped with the other end of the fixing plate. Since the moving spring and the main spring are accommodated in the space inside the U-shaped basket, it is very easy to cause the moving spring and the main spring to deviate and fall off during the assembly action, which increases the difficulty of assembling the push rod assembly.

[0005] (ii) The U-shaped basket is made of metal material. When a reverse arc is generated, the U-shaped basket is short-circuited and the arc cannot be extinguished, which further makes the relay easy to burn out, resulting in a reduction in the reverse electrical life of the relay. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a driving structure for a DC relay to solve one or more problems in the prior art.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows:

[0008] A pushing structure for a DC relay, the pushing structure comprising a moving reed, an elastic member and a pushing assembly, one end of the elastic member abuts against the moving reed, and the other end of the elastic member abuts against a portion of the pushing assembly; the pushing structure also comprises an arc-extinguishing stop plate, the arc-extinguishing stop plate is connected to another portion of the pushing assembly, so that the moving reed is subjected to the force of the elastic member and abuts against the arc-extinguishing stop plate.

[0009] Furthermore, the arc-extinguishing stop plate includes a stop plate body with a first hole, a metal piece passes through the stop plate body and extends from both ends of the stop plate body, and a plurality of first protrusions are arranged on the surface of the stop plate body.

[0010] Furthermore, each of the first protrusions is formed along the length direction of the stop plate body.

[0011] Furthermore, adjacent first protrusions are arranged at intervals.

[0012] Furthermore, the movable spring includes a movable spring body, and a plurality of second protrusions are arranged on the movable spring body.

[0013] Furthermore, the outer side of each of the second protrusions has a curved surface that can cooperate with the elastic member.

[0014] Furthermore, the pushing assembly includes an insulating seat and fixed plates connected along two ends of the insulating seat, a second hole is formed on each of the fixed plates, and a portion of the insulating seat is connected to the rod body.

[0015] Furthermore, another part of the insulating seat has a third protrusion, and a groove is provided on the insulating seat along the outer side of the third protrusion.

[0016] Furthermore, a bending portion is provided at one end of each fixing sheet away from the insulating seat near the second hole.

[0017] Compared with the prior art, the beneficial technical effects of the utility model are as follows

[0018] (i) The utility model adds an arc extinguishing stop plate, and the arc extinguishing stop plate has a plurality of first protrusions, each of which is arranged along the length or non-length direction of the stop plate body, which can improve the arc extinguishing effect under extreme working conditions.

[0019] (ii) By designing the fixing plate and the insulating seat as one body, the movable spring piece is always pressed against the arc extinguishing stop piece by the action of the elastic member. At the same time, a second protrusion is provided on the movable spring piece and a groove is provided on the insulating seat, which can realize the positioning of the elastic member so that the elastic member will not deviate from or fall off the movable spring piece when the assembly action is performed, thereby reducing the difficulty of assembling the push rod assembly.

[0020] (III) Furthermore, chamfers are provided at both ends of the metal part, which have a guiding function. At the same time, a bending portion is provided at one end of the fixing plate away from the insulating seat. The bending portion facilitates the assembly of the arc extinguishing stop plate and the fixing plate, thereby improving the assembly efficiency.

[0021] (iv) Furthermore, a planar groove is provided on the movable spring body, and the planar groove is lower than the side of the movable spring body away from the arc extinguishing stop plate (i.e., the bottom surface of the movable spring body), which can improve the matching size progress of the movable spring and the elastic member, thereby accurately controlling the force value of the elastic force. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The schematic diagram of the structure of the driving structure for the DC relay according to the embodiment of the utility model is shown.

[0023] Figure 2 A schematic structural diagram of an arc-extinguishing stopper in a driving structure for a DC relay according to an embodiment of the utility model is shown at a first viewing angle.

[0024] Figure 3 A schematic structural diagram of the arc extinguishing stopper in the driving structure for a DC relay according to an embodiment of the utility model is shown at a second viewing angle.

[0025] Figure 4 The schematic diagram of the structure of the movable spring in the driving structure for the DC relay according to the embodiment of the utility model is shown.

[0026] Figure 5 The schematic diagram of the structure of the driving component in the driving structure for the DC relay according to the embodiment of the utility model is shown.

[0027] Markings in the accompanying drawings: 1. arc-extinguishing stop plate; 100. metal part; 1000. chamfer; 101. stop plate body; 102. first protrusion; 103. first hole; 2. movable spring; 200. movable spring body; 201. second protrusion; 2010. arc surface; 202. plane groove; 3. elastic member; 4. pushing assembly; 400. second hole; 401. fixing plate; 402. groove; 403. insulating seat; 404. rod body; 405. third protrusion; 406. bending portion. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model clearer, the following is a further detailed description of the DC relay driving structure proposed in the utility model in combination with the accompanying drawings and specific implementation methods. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0029] Please refer to Figure 1 The pushing structure includes a moving spring piece 2, an elastic member 3 and a pushing assembly 4, wherein the moving spring piece 2 is used to contact the auxiliary contact (not shown in the figure). The elastic member 3 is preferably a spring in the pushing structure for a DC relay of the embodiment of the utility model, one end of the elastic member 3 abuts against the lower surface of the moving spring piece 2, and the other end of the elastic member 3 abuts against a part of the pushing assembly 4, wherein the pushing structure also includes an arc-extinguishing stopper 1, the arc-extinguishing stopper 1 has a plurality of first protrusions 102, and the arc-extinguishing stopper 1 is connected to another part of the pushing assembly 4, so that the moving spring piece 2 is subjected to the force of the elastic member 3 and abuts against the arc-extinguishing stopper 1.

[0030] For further information, please refer to Figure 2 and Figure 3 The arc-extinguishing stopper 1 includes a stopper body 101 with a first hole 103, and a metal member 100 passes through the stopper body 101 and extends from both ends of the stopper body 101. Specifically, both ends of the metal member 100 have chamfers 1000, which are convenient for connection with the push assembly 4. The stopper body 101 is passed through along the length direction of the stopper body 101, and both ends of the metal member 100 are respectively provided with chamfers 1000.

[0031] For further information, please continue to refer to Figure 2 and Figure 3 Each of the first protrusions 102 is formed along the length or non-length direction of the stop plate body 101 to form a grid structure, which can improve the arc extinguishing effect under extreme working conditions. Adjacent first protrusions 102 are spaced apart from each other, and the spacing between adjacent first protrusions 102 is equal or unequal.

[0032] For further information, please refer to Figure 4 The movable spring 2 includes a movable spring body 200, and a plurality of second protrusions 201 are arranged at the bottom of the movable spring body 200. Specifically, there are preferably two second protrusions 201, and the two second protrusions 201 are symmetrically arranged with the longitudinal central axis A of the movable spring body 200 as the center.

[0033] Furthermore, in order to ensure the positioning of the elastic member 3 after assembly, an arc surface 2010 that can cooperate with the inner ring of the elastic member 3 is also provided on the outer side of each second protrusion 201. The arc surface 2010 enables the elastic member 3 to cooperate with the inner ring of the elastic member 3 after assembly, thereby ensuring that part of the elastic member 3 is not easily separated from the movable spring body 200. Furthermore, the movable spring body 200 also has a plane groove 202, which is provided on a side of the movable spring body 200 away from the arc extinguishing stopper 1, and the second protrusion 201 is also provided in the plane groove 202. The plane groove 202 is lower than the bottom surface of the movable spring body 200. By stamping the plane groove 202 on the bottom surface of the movable spring body 200, the matching dimensional accuracy of the movable spring 2 and the elastic member 3 can be improved, thereby accurately controlling the force value of the elastic force.

[0034] Further, the specific structure of the pushing component 4 is described below:

[0035] Please refer to Figure 1 and Figure 5 The pushing assembly 4 includes an insulating seat 403 and fixed sheets 401 connected along both ends of the insulating seat 403. Each fixed sheet 401 is formed above the insulating seat 403. Each fixed sheet 401 has a second hole 400, and the length and width of the second hole 400 are adapted to the metal member 100. Furthermore, a rod 404 is connected to the bottom of the insulating seat 403.

[0036] Furthermore, the fixing plate 401, the insulating seat 403 and the rod body 404 are connected to each other to form an integrated structure. Of course, in other embodiments of the present invention, the fixing plate 401, the insulating seat 403 or the rod body 404 may also be

[0037] For further information, please continue to refer to Figure 1 and Figure 5 A third protrusion 405 is further provided on the upper surface of the insulating seat 403, and the outer diameter of the third protrusion 405 is smaller than the inner diameter of the elastic member 3, so that the end of the elastic member 3 away from the movable spring 2 can be assembled with the third protrusion 405. Further, in order to ensure the limiting of the elastic member 3, a groove 402 is further provided on the insulating seat 403 along the outer side of the third protrusion 405, and the groove 402 is preferably an annular groove, which is used to embed the elastic member 3.

[0038] For further information, please continue to refer to Figure 5 A bending portion 406 is further provided at one end of each fixing plate 401 away from the insulating seat 403 near the second hole 400 , and the bending portion 406 facilitates the assembly of the arc extinguishing stopper 1 and the fixing plate 401 , further improving the assembly efficiency.

[0039] The specific assembly process of the utility model is as follows:

[0040] First, insert one end of the elastic member 3 into the above-mentioned groove 402, then take the movable spring 2, press the side of the movable spring 2 with the second protrusion 201 into the inner circle of the elastic member 3, take one end of the arc-extinguishing stopper 1 and insert it into the second hole 400 of the fixed plate 401 on one side, then insert the other end of the arc-extinguishing stopper 1 into the second hole 400 of the fixed plate 401 on the other side, and finally rivet the two ends of the arc-extinguishing stopper 1 (or not riveted), and the assembly of the entire pushing structure can be completed. When the arc enters the arc-extinguishing stopper 1, the grid structure formed by each first protrusion 102 affects the arc to be divided into several short arcs in series. Each two first protrusions 102 are regarded as a pair of electrodes, and each pair of electrodes has an insulation strength of 150V to 250V, which increases the insulation strength of the entire grid structure, and the voltage between each first protrusion 102 is not enough to reach the arc burning voltage, and each first protrusion 102 can absorb the heat of the arc, so that the arc is quickly cooled and extinguished.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A driving structure for a DC relay, characterized in that: The pushing structure includes a movable spring, an elastic member and a pushing assembly, one end of the elastic member abuts against the movable spring, and the other end of the elastic member abuts against a part of the pushing assembly; the pushing structure also includes an arc-extinguishing stop plate, the arc-extinguishing stop plate has a plurality of first protrusions, and the arc-extinguishing stop plate is connected to another part of the pushing assembly, so that the movable spring is subjected to the force of the elastic member and abuts against the arc-extinguishing stop plate.

2. The driving structure for a DC relay according to claim 1, characterized in that: The arc-extinguishing stopper includes a stopper body, a metal piece passes through the stopper body and extends from two ends of the stopper body, and chamfers are respectively provided at both ends of the metal piece.

3. The driving structure for a DC relay according to claim 2, characterized in that: Each of the first protrusions is formed along the length direction or non-length direction of the stop plate body.

4. The driving structure for a DC relay according to claim 3, characterized in that: Adjacent first protrusions are arranged at intervals.

5. The driving structure for a DC relay according to claim 1, characterized in that: The movable spring comprises a movable spring body, and a plurality of second protrusions are arranged on the movable spring body.

6. The driving structure for a DC relay according to claim 5, characterized in that: The outer side of each of the second protrusions has a curved surface that can cooperate with the elastic member.

7. The driving structure for a DC relay according to claim 6, characterized in that: The movable spring body also has a plane groove, and the plane groove is lower than a side of the movable spring body away from the arc extinguishing stopper.

8. The driving structure for a DC relay according to claim 1, characterized in that: The pushing assembly includes an insulating seat and fixed plates connected along two ends of the insulating seat, a second hole is formed on each of the fixed plates, and a part of the insulating seat is connected to the rod body.

9. The driving structure for a DC relay according to claim 8, characterized in that: Another part of the insulating seat has a third protrusion, and a groove is provided on the insulating seat along the outer side of the third protrusion.

10. The driving structure for a DC relay according to claim 8, characterized in that: A bending portion is further provided at one end of each of the fixing plates away from the insulating seat near the second hole.

Images