Auxiliary switch triggering structure of direct current contactor

Abstract

An auxiliary switch trigger structure of a direct current contactor comprises a moving contact mounting groove, a connecting piece and a switch push rod, the moving contact mounting groove is arranged at the left end of the connecting piece, and the switch push rod is arranged at the right end of the upper surface of the connecting piece; the outer surface of the switch ejector rod is sleeved with a spring, and the lower end of the spring is connected with the switch ejector rod. According to the utility model, the defects in the prior art are overcome, the spring is sleeved on the outer surface of the switch push rod, so that the soft contact effect of the spring and the swing rod of the microswitch can be effectively realized, and the upper end of the spring always has upward acting force after being contacted with the swing rod through the elastic acting force of the spring, so that the safety of the microswitch is ensured. Therefore, the contact stability is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of direct current contactors, in particular to a direct current contactor auxiliary switch trigger structure. Background Art

[0002] DC contactors are generally composed of a coil and external magnetic circuit, an arc extinguishing chamber, a static contact, a moving contact, a movable shaft assembly, a permanent magnet and a plastic shell. With the widespread use of energy-saving and efficient DC equipment such as electric vehicles, fast charging piles, battery switching and high-voltage DC voltage switch control.

[0003] At present, the existing sealed DC contactor with auxiliary switch, its auxiliary switch is first welded and assembled with the PCB board, and then installed in the cavity of the contactor. When working, the existing switch top rod and the button-type micro switch directly adopt the hard contact method. For example, the patent number is: 201620127141.4, and the patent name is: DC contactor with self-test function; it is provided with a cantilever that moves synchronously with the moving contact assembly under the moving contact piece, thereby relying on the hard contact method between the cantilever and the micro switch to transmit signals. However, hard contact is prone to collision damage during long-term use, and during long-term hard contact, it is also easy to cause deformation of the entire moving contact assembly, which then causes poor contact problems. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a DC contactor auxiliary switch trigger structure, which overcomes the deficiencies of the prior art and has a reasonable design. It can achieve a soft contact effect between a spring and a rocker arm of a micro switch and further ensures the stability of the contact.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A DC contactor auxiliary switch trigger structure comprises a moving contact mounting groove, a connecting piece and a switch top rod, wherein the moving contact mounting groove is arranged at the left end of the connecting piece, and the switch top rod is arranged at the right end of the upper surface of the connecting piece;

[0007] A spring is sleeved on the outer surface of the switch top rod, and the lower end of the spring is connected to the switch top rod.

[0008] Preferably, an annular groove is provided at the lower end of the outer surface of the switch top rod, and the lower end of the spring is fixedly clamped in the annular groove.

[0009] Preferably, a guide through hole is opened in the middle of the switch top rod along the vertical axis, a guide column is movably installed in the guide through hole, a contact block is arranged at the upper end of the guide column, and the upper end of the spring is fixedly welded to the contact block.

[0010] Preferably, the connecting member comprises two positioning blocks and three connecting blocks, the positioning blocks and connecting blocks are arranged alternately in sequence, and adjacent positioning blocks and connecting blocks are connected by vertical plates, and positioning grooves with downward openings are formed between the positioning blocks and the vertical plates on both sides thereof.

[0011] Preferably, a limiting protrusion is provided in the moving contact mounting groove.

[0012] The utility model provides a DC contactor auxiliary switch trigger structure. It has the following beneficial effects: a spring is sleeved on the outer surface of the switch top rod, so when the switch top rod moves upward under the drive of the moving contact, the spring is brought into contact with the swing rod of the micro switch, and because the spring itself has a certain elastic compression deformation, the soft contact effect of the spring and the swing rod of the micro switch can be effectively achieved, and through the elastic force of the spring itself, the upper end of the spring always has an upward force after contacting the swing rod, thereby further ensuring the stability of the contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings required for describing the prior art are briefly introduced below.

[0014] Figure 1 A schematic diagram of the structure of the utility model;

[0015] Figure 2 A schematic diagram of the cross-sectional structure of the third embodiment of the present utility model;

[0016] Figure 3 A schematic diagram of the structure of the moving contact installation slot, the connecting piece and the switch top rod in the utility model;

[0017] Description of the numbers in the figure:

[0018] 1. Moving contact mounting groove; 2. Connecting piece; 3. Switch top rod; 4. Spring; 5. Annular groove; 6. Guide through hole; 7. Guide column; 8. Contact block; 9. Limiting protrusion; 21. Positioning block; 22. Connecting block; 23. Vertical plate; 24. Positioning groove. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0020] Embodiment 1, as Figure 1-3 As shown, a DC contactor auxiliary switch trigger structure includes a moving contact mounting groove 1, a connecting member 2 and a switch top rod 3, wherein the moving contact mounting groove 1 is arranged at the left end of the connecting member 2, and the switch top rod 3 is arranged at the right end of the upper surface of the connecting member 2;

[0021] A spring 4 is sleeved on the outer surface of the switch top rod 3 , and the lower end of the spring 4 is connected to the switch top rod 3 .

[0022] Working principle:

[0023] The utility model is used in conjunction with a rocker-type microswitch. During installation, the lower surface of the moving contact mounting groove 1 is connected to the push rod of the DC contactor, and the moving contact is mounted above the moving contact mounting groove 1, while the upper end of the switch top rod 3 cooperates with the rocker of the rocker-type microswitch. In this embodiment, a spring 4 is sleeved on the outer surface of the switch top rod 3, so that when the switch top rod 3 moves upward driven by the moving contact, the spring 4 will contact the rocker of the microswitch, and because the spring 4 itself has a certain elastic compression deformation, the soft contact effect of the spring 4 and the rocker of the microswitch can be effectively achieved, and through the elastic force of the spring 4 itself, the upper end of the spring 4 always has an upward force after contacting the rocker, thereby further ensuring the stability of the contact.

[0024] Embodiment 2, as a further preferred solution of embodiment 1, an annular groove 5 is provided at the lower end of the outer surface of the switch top rod 3, and the lower end of the spring 4 is fixedly engaged in the annular groove 5. The annular groove 5 can realize the limit fixation of the lower end position of the spring 4, thereby effectively preventing the spring 4 from being separated from the switch top rod 3 during use. Then the reliability of the contact between the spring 4 and the micro switch rocker is guaranteed.

[0025] Embodiment three, as Figure 2 As shown, as a further preferred solution of the first embodiment, a guide hole 6 is provided in the middle of the switch top rod 3 along the vertical axis, a guide column 7 is movably installed in the guide hole 6, a contact block 8 is provided at the upper end of the guide column 7, and the upper end of the spring 4 is fixedly welded to the contact block 8. Therefore, when in use, the guide column 7 can move up and down in the guide hole 6 along the axial direction of the guide hole 6, and the spring 4 is sleeved on the outer surface of the guide column 7, so that the axial limit of the spring 4 can be achieved, and the spring 4 can be prevented from bending during use, thereby causing the problem of poor contact.

[0026] Embodiment 4, as Figure 3As shown, as a further preferred solution of the first embodiment, the connector 2 includes two positioning blocks 21 and three connecting blocks 22, the positioning blocks 21 and the connecting blocks 22 are arranged alternately in sequence, and the adjacent positioning blocks 21 and the connecting blocks 22 are connected by the vertical plates 23, and the positioning blocks 21 and the vertical plates 23 on both sides thereof are surrounded by a positioning groove 24 with an opening downward. By setting the connector 2 as two positioning blocks 21 and three connecting blocks 22, and the adjacent positioning blocks 21 and the connecting blocks 22 are connected by the vertical plates 23, firstly, a positioning groove 24 is surrounded by the two positioning blocks 21 and the vertical plates 23 on both sides thereof, so that a certain positioning effect can be achieved during installation and use, thereby avoiding the cumulative error during assembly. In addition, by setting the vertical plates 23, the positioning blocks 21 and the connecting blocks 22 are connected on both sides thereof, respectively, so that the entire connector 2 is cut into a plurality of blocks, so that the entire connector 2 can be strengthened in the vertical direction to increase the tensile lifting force, so as to prevent the connector 2 from deforming after long-term use.

[0027] Embodiment 5, as a further preferred embodiment of embodiment 1, a limiting protrusion 9 is provided in the movable contact mounting groove 1. When assembling the movable contact, the movable contact mounting groove 1 and the contact plate and the push rod can be assembled first, and then the compression spring, the metal sheet, and the movable contact can be installed above the movable contact mounting groove 1 in sequence, and the limiting protrusion 9 can achieve the limiting effect of the compression spring.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A DC contactor auxiliary switch trigger structure, Features: It comprises a moving contact mounting groove (1), a connecting piece (2) and a switch top rod (3), wherein the moving contact mounting groove (1) is arranged at the left end of the connecting piece (2), and the switch top rod (3) is arranged at the right end of the upper surface of the connecting piece (2); A spring (4) is sleeved on the outer surface of the switch top rod (3), and the lower end of the spring (4) is connected to the switch top rod (3).

2. A DC contactor auxiliary switch trigger structure according to claim 1, Features: An annular groove (5) is provided at the lower end of the outer surface of the switch top rod (3), and the lower end of the spring (4) is fixedly clamped in the annular groove (5).

3. A DC contactor auxiliary switch trigger structure according to claim 1, Features: A guide through hole (6) is provided in the middle of the switch top rod (3) along the vertical axis, a guide column (7) is movably installed in the guide through hole (6), a contact block (8) is provided at the upper end of the guide column (7), and the upper end of the spring (4) is fixedly welded to the contact block (8).

4. A DC contactor auxiliary switch trigger structure according to claim 1, Features: The connecting member (2) comprises two positioning blocks (21) and three connecting blocks (22); the positioning blocks (21) and the connecting blocks (22) are arranged alternately in sequence, and adjacent positioning blocks (21) and connecting blocks (22) are connected via vertical plates (23); and positioning grooves (24) opening downward are formed between the positioning blocks (21) and the vertical plates (23) on both sides thereof.

5. A DC contactor auxiliary switch trigger structure according to claim 1, Features: A limiting protrusion (9) is arranged in the movable contact installation groove (1).

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