Auxiliary switch assembly mounting structure

Abstract

The utility model discloses an auxiliary switch assembly installation structure which comprises a guide plate, a push rod and an auxiliary switch assembly, the guide plate is provided with a plate main body, an installation boss arranged on the plate main body in a protruding mode and a positioning structure arranged on the installation boss, the push rod is arranged on the plate main body in a penetrating mode, and an insulation base is fixedly arranged on the push rod in a sleeved mode. The auxiliary switch assembly is provided with an ejector rod fixedly connected to the insulating seat and a microswitch detachably positioned and installed on the installation boss through a positioning structure, and the ejector rod can be driven by the push rod to abut against or be separated from a swing rod of the microswitch. According to the auxiliary switch assembly mounting structure, real-time, high-accuracy and high-reliability signal feedback can be performed on the working state of the main contact structure, and the reliability and accuracy of a contactor product during working are greatly improved; the structure is simple and reasonable, machining and manufacturing are easy, assembling is convenient and fast, the production cost is effectively reduced, and production and implementation are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to an auxiliary switch component installation structure. Background Art

[0002] An epoxy-sealed DC contactor is an electrical component that controls the on / off switching of a DC circuit. It primarily controls the circuit by disconnecting or connecting the current. Compared to conventional AC contactors, it offers higher withstand voltage, interrupting capacity, and better electrical performance. Currently, epoxy-sealed DC contactors are widely used in industries such as power systems, rail transit, new energy, and energy storage.

[0003] In epoxy-sealed DC contactor structures currently available on the market, the contact signal from a microswitch is typically converted into a feedback signal for the DC contactor, providing real-time feedback on the operating status of the DC contactor's main contact structure. However, because the microswitch is currently conventionally secured to the DC contactor's guide plate or arc-extinguishing cavity (also known as the arc-extinguishing hood) by welding, this places high demands on the microswitch's alignment accuracy during the mounting process, increasing the difficulty of fabrication. Any poor alignment of the microswitch can impact the reliability and accuracy of the contactor's operation.

[0004] In view of this, the present utility model is proposed. Summary of the Invention

[0005] In order to overcome the above-mentioned defects, the utility model provides an auxiliary switch assembly installation structure. On the one hand, it can provide real-time, highly accurate and highly reliable signal feedback on the working status of the main contact structure, greatly improving the reliability and accuracy of the contactor product during operation; on the other hand, its structure is simple and reasonable, easy to process and manufacture, and convenient to assemble, effectively reducing production costs and facilitating production implementation.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an auxiliary switch assembly mounting structure for being installed in an epoxy-sealed DC contactor, comprising a guide plate, a push rod and an auxiliary switch assembly, wherein the guide plate is provided with a plate body, a mounting boss protruding from the plate body and a positioning structure provided on the mounting boss, the push rod is passed through the plate body, and an insulating seat is fixedly sleeved on the push rod, the auxiliary switch assembly is provided with a push rod fixedly connected to the insulating seat and a micro switch detachably positioned and mounted on the mounting boss by the positioning structure, and the push rod can be pressed against or separated from the rocker arm of the micro switch under the drive of the push rod.

[0007] As a further improvement of the present invention, the micro switch is provided with a positioning hole; the positioning structure is provided with a positioning pin fixedly arranged on the mounting boss, and the positioning pin can be tightly plugged into the positioning hole.

[0008] As a further improvement of the present invention, the micro switch is provided with a positioning hole; the positioning structure is provided with a positioning pin fixedly arranged on the mounting boss and a stop head rotatably connected to the end of the positioning pin facing away from the mounting boss, the positioning pin can be plugged into and fitted with the positioning hole, and the stop head can resist the side of the micro switch facing away from the mounting boss.

[0009] As a further improvement of the present invention, the ejector rod, the insulating seat and the push rod are fixedly connected into one body through an injection molding process.

[0010] As a further improvement of the present invention, the auxiliary switch assembly is further provided with a control circuit board and a lead-out terminal. The control circuit board is also fixedly arranged on the mounting boss. The lead-out terminal and the micro switch are respectively welded to the control circuit board and electrically connected.

[0011] As a further improvement of the present invention, the control circuit board is fixedly connected to the mounting boss by gluing; a through hole A for the positioning structure to pass freely is provided on the control circuit board.

[0012] As a further improvement of the present invention, a through hole B for the push rod to pass through is provided on the plate body.

[0013] As a further improvement of the present invention, the plate body and the mounting boss are integrally injection-molded; the positioning structure is fixedly connected to the mounting boss by tight-fitting plug-in or screw connection or injection molding and is insulated from each other.

[0014] The beneficial effects of the present utility model are as follows: compared with the prior art, ① the present utility model, on the one hand, by fixing the push rod to the insulating seat (i.e., the push rod) and cooperating with the micro switch, can synchronize the on-off operation of the auxiliary switch assembly with the on-off operation of the main contact structure in the DC contactor, that is, realize real-time feedback on the working status of the main contact structure; on the other hand, by setting the positioning structure to install and position the micro switch, the alignment accuracy during the installation of the micro switch can be effectively improved, thereby greatly improving the accuracy and reliability of the feedback signal of the auxiliary switch assembly, and further greatly improving the reliability and accuracy of the contactor product during operation. ② The installation structure of the auxiliary switch assembly of the present utility model is simple and reasonable, easy to process and manufacture, and convenient to assemble, thereby effectively reducing production costs and facilitating production implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram (partial diagram) of the assembly structure of the auxiliary switch assembly installation structure described in Example 1 of the present utility model installed in an epoxy-sealed DC contactor;

[0016] Figure 2 for Figure 1 A schematic cross-sectional view of the assembly structure shown;

[0017] Figure 3 This is a schematic cross-sectional view of the auxiliary switch assembly installation structure according to Example 1 of the present utility model;

[0018] Figure 4 for Figure 1 The structural schematic diagram of the guide plate shown is in another perspective;

[0019] Figure 5 for Figure 1 A schematic structural diagram of a partial structure of the auxiliary switch assembly shown in another perspective;

[0020] Figure 6 for Figure 5 An exploded structural diagram of a partial structure of the auxiliary switch assembly shown;

[0021] Figure 7 This is a structural schematic diagram of the positioning structure in the auxiliary switch assembly installation structure described in Example 2 of the present utility model.

[0022] The following description is made with reference to the accompanying drawings:

[0023] 1. Guide plate; 10. Plate body; 11. Mounting boss; 12. Positioning pin;

[0024] 13. Stopper; 14. Perforation B; 2. Push rod; 3. Auxiliary switch assembly; 30. Push rod; 31. Micro switch; 310. Rocker arm; 311. Positioning hole; 32. Control circuit board; 320. Perforation A; 33. Lead-out terminal; 4. Insulation seat; 5. Moving contact piece; 6. Contact spring; 7. Moving iron core; 8. Return spring. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] Example 1:

[0027] Please see the attached Figure 1 To the attached Figure 6As shown, this embodiment 1 provides an auxiliary switch assembly mounting structure for installation in an epoxy-sealed DC contactor. The auxiliary switch assembly mounting structure includes a guide plate 1, a push rod 2, and an auxiliary switch assembly 3. The guide plate 1 includes a plate body 10, a mounting boss 11 protruding from the plate body 10, and a positioning structure provided on the mounting boss 11. The push rod 2 passes through the plate body 10 and is fixedly sleeved with an insulating seat 4. The auxiliary switch assembly 3 includes a push rod 30 fixedly connected to the insulating seat 4 and a micro switch 31 detachably positioned and mounted on the mounting boss 11 via the positioning structure. The push rod 30 can be driven by the push rod 2 to press against or disengage from a rocker arm 310 of the micro switch 31. It can be understood that when the coil winding in the DC contactor is energized, a magnetic field is generated to drive the moving iron core 7 to move upward, thereby driving the push rod 2 to move upward, and the upward movement of the push rod 2 will drive the moving contact piece 5 to move upward to be attracted and connected with the static contact, wherein the contact spring 6 can ensure that the moving contact piece 5 is attracted and connected with the static contact, and will drive the push rod 30 to move upward to disengage from the rocker rod 310 of the micro switch 31, at which time the micro switch 31 feeds back a closed signal; and when the coil winding in the DC contactor loses power, under the action of the gravity of the moving iron core 7 and the push rod 2 themselves, and the elastic force of the return spring 8, the push rod 2 will move downward, and the downward movement of the push rod 2 will drive the moving contact piece 5 to move downward to disconnect from the static contact, and will drive the push rod 30 to move downward to press against the rocker rod 310 of the micro switch 31, at which time the micro switch 31 feeds back a disconnection signal.

[0028] As can be seen from the above, ① on the one hand, by fixing the push rod 30 to the insulating seat 4 (i.e., the push rod 2) and cooperating with the micro switch 31, this embodiment 1 can synchronize the on-off operation of the auxiliary switch assembly 3 with the on-off operation of the main contact structure in the DC contactor (the on-off operation of the main contact structure is the above-mentioned "the movable contact piece can be connected or disconnected with the static contact under the drive of the push rod", which is common knowledge), that is, to achieve real-time feedback on the working status of the main contact structure; on the other hand, by setting the positioning structure to install and position the micro switch 31, the alignment accuracy of the micro switch 31 during installation can be effectively improved, thereby greatly improving the accuracy and reliability of the feedback signal of the auxiliary switch assembly 3, and further greatly improving the reliability and accuracy of the contactor product during operation. ② The auxiliary switch assembly installation structure described in this embodiment 1 is simple and reasonable, easy to process and manufacture, and convenient to assemble, thereby effectively reducing production costs and facilitating production implementation.

[0029] The specific structure of the auxiliary switch assembly installation structure described in this embodiment 1 is described in detail below.

[0030] First, let's discuss the guide plate 1 .

[0031] In this embodiment 1, the plate body 10 and the mounting boss 11 in the guide plate 1 are both made of insulating plastic material and are integrally injection molded through an injection molding process; and according to the design requirements of the contactor product, the positioning structure can be fixedly connected to the mounting boss 11 by tight fitting, screw connection or injection molding and insulated from each other.

[0032] Further, regarding the specific structure and installation method of the positioning structure, the preferred design of this embodiment 1 is: Please continue to refer to the attached Figure 4 As shown, the positioning structure is provided with a positioning pin 12, and the positioning pin 12 is fixedly arranged on the mounting boss 11 by tight-fitting plug-in or screw connection or injection molding. Note: ① Regarding the number of the positioning pins 12, this embodiment 1 does not impose any restrictions, and can be determined according to product design requirements, but it is understandable that it is better to configure the positioning pins 12 with more than two, so that the installation stability of the micro switch 31 can be better. ② Based on the molding method of the plate body 10 and the mounting boss 11, it is better to use injection molding to fix the positioning pin 12 to the mounting boss 11, which can save processing steps.

[0033] Based on the configuration of the positioning pin 12, in this embodiment 1, a positioning hole 311 is provided on the micro switch 31 to be tightly plugged with the positioning pin 12 (see the attached Figure 5 and 6 As shown), the micro switch 31 is fixed to the mounting boss 11 with high positioning accuracy and high firmness.

[0034] In addition, in order to enable the push rod 2 to pass through the plate body 10, this embodiment 1 further provides a through hole B14 on the plate body 10 for the push rod 2 to pass through movably. Figure 4 shown.

[0035] Next, let's discuss the auxiliary switch assembly 3 .

[0036] In this embodiment 1, the push rod 30 in the auxiliary switch assembly 3 is fixedly connected to the insulating seat 4 and the push rod 2 through an injection molding process. It is understandable that the push rod 30 and the insulating seat 4 are both made of insulating plastic material and are insulated from the push rod 2.

[0037] Please continue to refer to the attached Figure 3 and attached Figure 5As shown, in this embodiment 1, the auxiliary switch assembly 3 is further provided with a control circuit board 32 and a lead-out terminal 33. The control circuit board 32 is also fixedly arranged on the mounting boss 11. The lead-out terminal 33 and the micro switch 31 are respectively welded to the control circuit board 32 and electrically connected. The lead-out terminal 33 is used to connect to an external signal detection device to connect the normally closed contact of the micro switch 31 to the external signal detection device.

[0038] Furthermore, the control circuit board 32 can be fixedly connected to the mounting boss 11 by gluing, and based on the mounting method of the micro switch 31, the control circuit board 32 is further provided with a through hole A320 for the positioning structure (specifically the positioning pin 12) to freely pass through, so as to avoid the positioning pin 12; Figure 6 shown.

[0039] Example 2:

[0040] This embodiment 2 also provides an auxiliary switch assembly installation structure, and compared with embodiment 1, the difference between the auxiliary switch assembly installation structure described in this embodiment 2 is: ① The specific structure of the positioning structure described in this embodiment 2 is different from that in embodiment 1.

[0041] Specifically, the specific structure of the positioning structure in this embodiment 2 is as follows: Figure 7 As shown, the positioning structure includes a positioning pin 12 fixedly provided on the mounting boss 11 and a stopper 13 that adopts a cylindrical structure and is rotatably connected to the end of the positioning pin 12 facing away from the mounting boss 11. The positioning pin 12 can be slightly tightly plugged into the positioning hole 311 on the micro switch 31, and the stopper 13 can abut against the side of the micro switch 31 facing away from the mounting boss 11. It is understandable that during assembly, the stopper 13 is first rotated so that it is coaxial with the positioning pin 12 (the diameter of the stopper 13 is not larger than the diameter of the positioning pin 12). After the micro switch 31 is sleeved on the positioning pin 12 through the positioning hole 311 thereon, the stopper 13 is rotated again so that it presses / abuts against one side of the micro switch 31, so that the micro switch 31 can be limited to the mounting boss 11 with high alignment accuracy. Based on the positioning structure provided in this embodiment 2, the installation method of the micro switch 31 can be made more labor-saving and quick.

[0042] Furthermore, in this embodiment 2, the positioning pin 12 can also be fixed on the mounting boss 11 by tight fitting, screw connection or injection molding; the stop head 13 is rotatably connected to the positioning pin 12 through a rotating shaft (refer to the rotation connection method in the connecting rod mechanism).

[0043] Note: In addition to the above-mentioned differences, the specific implementation structure and mutual connection method of the plate body 10, mounting boss 11, push rod 2, auxiliary switch assembly 3, and insulating seat 4 in the auxiliary switch assembly installation structure described in this embodiment 2 are the same as those in embodiment 1; therefore, they will not be repeated here.

[0044] Finally, the suffixes "A", "B", etc. (such as perforation A, perforation B, etc.) of the component names in the specification of this utility model patent are only for the convenience of description and are not used to limit the scope of implementation of this utility model patent.

[0045] To sum up, the auxiliary switch assembly installation structure described in the utility model can not only provide real-time, highly accurate and highly reliable signal feedback on the working status of the main contact structure, greatly improving the reliability and accuracy of the contactor product during operation; it also has a simple and reasonable structure, is easy to process and manufacture, and is convenient to assemble, effectively reducing production costs and facilitating production implementation.

[0046] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. An auxiliary switch assembly mounting structure for mounting in an epoxy-sealed DC contactor, characterized in that: The invention comprises a guide plate (1), a push rod (2) and an auxiliary switch assembly (3); the guide plate (1) is provided with a plate body (10), a mounting boss (11) protruding from the plate body (10) and a positioning structure provided on the mounting boss (11); the push rod (2) is passed through the plate body (10), and an insulating seat (4) is fixedly sleeved on the push rod (2); the auxiliary switch assembly (3) is provided with a top rod (30) fixedly connected to the insulating seat (4) and a micro switch (31) detachably positioned and mounted on the mounting boss (11) by the positioning structure; and the top rod (30) can be driven by the push rod (2) to press against or detach from a rocker rod (310) of the micro switch (31).

2. The auxiliary switch assembly mounting structure according to claim 1, characterized in that: The micro switch (31) is provided with a positioning hole (311); the positioning structure is provided with a positioning pin (12) fixedly arranged on the mounting boss (11), and the positioning pin (12) can be tightly plugged into the positioning hole (311).

3. The auxiliary switch assembly mounting structure according to claim 1, characterized in that: The micro switch (31) is provided with a positioning hole (311); the positioning structure is provided with a positioning pin (12) fixedly arranged on the mounting boss (11) and a stopper (13) rotatably connected to one end of the positioning pin (12) facing away from the mounting boss (11); the positioning pin (12) can be plugged into and matched with the positioning hole (311), and the stopper (13) can abut against the side of the micro switch (31) facing away from the mounting boss (11).

4. The auxiliary switch assembly mounting structure according to claim 1, characterized in that: The push rod (30), the insulating seat (4) and the push rod (2) are fixedly connected into one body through an injection molding process.

5. The auxiliary switch assembly mounting structure according to claim 1, characterized in that: The auxiliary switch assembly (3) is further provided with a control circuit board (32) and a lead terminal (33). The control circuit board (32) is also fixedly arranged on the mounting boss (11). The lead terminal (33) and the micro switch (31) are respectively welded to the control circuit board (32) and electrically connected.

6. The auxiliary switch assembly mounting structure according to claim 5, characterized in that: The control circuit board (32) is fixedly connected to the mounting boss (11) by gluing; The control circuit board (32) is provided with a through hole A (320) for the positioning structure to freely pass through.

7. The auxiliary switch assembly mounting structure according to claim 1, characterized in that: The plate body (10) is provided with a through hole B (14) for the push rod (2) to pass through.

8. The auxiliary switch assembly mounting structure according to claim 1, characterized in that: The plate body (10) and the mounting boss (11) are integrally injection-molded; the positioning structure is fixedly connected to the mounting boss (11) by tight-fitting plug-in connection, screw connection, or injection molding, and is insulated from each other.

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