A contactor with regulating function

Abstract

This utility model relates to the field of contactor technology and discloses a contactor with an adjustment function, including a DC contactor body and a metal connecting plate. Two connecting grooves are symmetrically formed on the rear surface of the DC contactor body, and a connecting block is slidably connected to the inner cavity of each connecting groove. The metal connecting plate is fixedly connected to the surface of the connecting block. A pressing block is slidably connected to the inside of the DC contactor body via a guide block. One end of the pressing block penetrates the DC contactor body and is fixedly connected to a button. A compression spring is provided between the pressing block and the inner wall of the DC contactor body. Through the linkage structure of the pressing block, the limiting block, and the spring, the metal connecting plate can be quickly installed and removed: during installation, simply pressing the button releases the limiting position, and after inserting the connecting block, releasing the button automatically clamps and fixes it; during disassembly, pressing the button again releases the connection. No tools are required throughout the process, greatly simplifying the operation and saving replacement time.

Description

Technical Field

[0001] This utility model relates to the field of contactor technology, specifically to a contactor with an adjustment function. Background Technology

[0002] A DC contactor is an electromagnetic contactor specifically designed for DC circuits. It is primarily used to control the switching on and off of DC loads. Like AC contactors, it functions as a switch in DC circuits. DC contactors utilize an electromagnetic coil to generate a magnetic field that attracts an iron core, which in turn actuates the contacts. DC contactors are widely used in automotive starting systems, traction motor control, DC power distribution systems, battery management systems, and uninterruptible power supply (UPS) systems. In industrial automation, they are also used to control the on / off switching of motors and other DC loads.

[0003] Currently, DC contactor bodies are mostly fixed by metal connecting plates on the rear surface. The metal connecting plates and DC contactor bodies are generally connected by screws. The connecting plates have pre-drilled screw holes, and the screws are passed through and tightened to the rear surface of the DC contactor. The external structure is then used to complete the fixation. However, this connection method has obvious drawbacks: when replacing connecting plates of different sizes, tools are needed to remove the screws, which is a cumbersome and time-consuming process; repeated disassembly can wear down the screw holes, causing the connection to loosen and affecting stability.

[0004] In view of this, the present invention solves the above-mentioned technical problems by proposing a contactor with an adjustment function. Utility Model Content

[0005] To address the shortcomings of the aforementioned background technology, this utility model provides a technical solution for a contactor with an adjustable function. Through the linkage structure of the pressing block, the limiting block, and the spring, the metal connecting plate can be quickly disassembled and assembled: during installation, simply pressing the button releases the limiting position, and after inserting the connecting block, releasing the button automatically locks it in place; during disassembly, pressing the button again releases the connection. No tools are required throughout the process, greatly simplifying the operation and saving replacement time. At the same time, the T-shaped connecting groove and the shape of the connecting block match the locking action of the limiting block, avoiding the problem of screw hole wear caused by repeated disassembly in traditional screw connections, effectively preventing loosening of the connection and improving the stability of long-term use.

[0006] This utility model provides the following technical solution: a contactor with adjustment function, comprising a DC contactor body and a metal connecting plate;

[0007] Two connecting slots are symmetrically formed on the rear surface of the DC contactor body. A connecting block is slidably connected to the inner cavity of each connecting slot. The metal connecting plate is fixedly connected to the surface of the connecting block.

[0008] The inside of the DC contactor body is slidably connected to a pressing block via a guide block. One end of the pressing block passes through the DC contactor body and is fixedly connected to a button. A compression spring is provided between the pressing block and the inner wall of the DC contactor body.

[0009] The DC contactor body has two limiting blocks symmetrically slidably connected inside by guide blocks. One end of each limiting block extends into the connecting groove, and multiple reset springs are provided between each limiting block and the inner wall of the DC contactor body.

[0010] As a preferred embodiment of this utility model, both the connecting groove and the connecting block are T-shaped structures, the extrusion block is trapezoidal in shape, and one end of each limiting block corresponding to the surface of the extrusion block is rounded.

[0011] As a preferred embodiment of this utility model, the connecting block is fixed to the metal connecting plate by welding, and the surface of the connecting block is provided with anti-slip texture.

[0012] As a preferred embodiment of this utility model, the limiting block is a brass limiting block, and a wear-resistant layer is provided at one end of the limiting block extending into the connecting groove.

[0013] As a preferred embodiment of this utility model, the surface of the button is provided with an insulating rubber sleeve, and the surface of the rubber sleeve is provided with anti-slip protrusions, and the surface of the compression spring is provided with an anti-corrosion coating.

[0014] As a preferred embodiment of this utility model, after the metal connecting plate is installed in place, the surface of the button is flush with the rear surface of the metal connecting plate.

[0015] As a preferred embodiment of this utility model, the metal connecting plate has an avoidance groove at the position corresponding to the button, and the depth of the avoidance groove is adapted to the protruding height of the button.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Compared to the existing technology where the metal connecting plate is connected to the DC contactor body via screws, this utility model achieves rapid assembly and disassembly of the metal connecting plate through a linkage structure of a pressing block, a limiting block, and a spring: during installation, simply press the button to release the limiting block, and after inserting the connecting block, releasing the button will automatically lock and fix it; during disassembly, pressing the button again will release the connection. No tools are required throughout the process, greatly simplifying the operation process and saving replacement time. At the same time, the T-shaped connecting groove and the shape of the connecting block match the locking action of the limiting block, avoiding the problem of screw hole wear caused by repeated disassembly in traditional screw connections, effectively preventing loosening of the connection and improving the stability of long-term use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the DC contactor body structure of this utility model;

[0019] Figure 2 This is a half-sectional view of the DC contactor body of this utility model;

[0020] Figure 3 This is a partial enlarged view of the DC contactor body of this utility model;

[0021] Figure 4 This is a schematic diagram of the connecting block structure of this utility model;

[0022] Figure 5 This is an exploded view of the DC contactor body of this utility model;

[0023] In the diagram: 1. DC contactor body; 101. Metal connecting plate; 2. Connecting groove; 201. Connecting block; 202. Pressing block; 203. Button; 204. Compression spring; 205. Limiting block; 206. Return spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-5 As shown, a contactor with an adjustment function includes a DC contactor body 1 and a metal connecting plate 101.

[0026] Two connecting slots 2 are symmetrically opened on the rear surface of the DC contactor body 1. A connecting block 201 is slidably connected to the inner cavity of each connecting slot 2. The metal connecting plate 101 is fixedly connected to the surface of the connecting block 201.

[0027] Inside the DC contactor body 1, a compression block 202 is slidably connected via a guide block. One end of the compression block 202 passes through the DC contactor body 1 and is fixedly connected to a button 203. A compression spring 204 is provided between the compression block 202 and the inner wall of the DC contactor body 1.

[0028] Inside the DC contactor body 1, two limiting blocks 205 are symmetrically slidably connected by guide blocks. One end of each limiting block 205 extends into the connecting groove 2. Multiple reset springs 206 are provided between each limiting block 205 and the inner wall of the DC contactor body 1.

[0029] Both the connecting groove 2 and the connecting block 201 are T-shaped structures, and the extrusion block 202 is trapezoidal in shape. Each limiting block 205 has a rounded corner treatment on one end of the surface of the extrusion block 202.

[0030] The T-shaped structure prevents the connecting block 201 from falling out of the connecting groove 2 through shape matching, ensuring connection stability; the trapezoidal extrusion block 202 drives the limit block 205 to move through the inclined surface, and the rounded corners reduce the frictional resistance when the two come into contact, improving the smoothness of mechanical action;

[0031] The connecting block 201 is fixed to the metal connecting plate 101 by welding, and the surface of the connecting block 201 is provided with anti-slip texture;

[0032] The limiting block 205 is a brass limiting block, and the end of the limiting block 205 extending into the connecting groove 2 is provided with a wear-resistant layer;

[0033] The surface of button 203 is provided with an insulating rubber sleeve, and the surface of the rubber sleeve is provided with anti-slip protrusions; the surface of spring 204 is provided with an anti-corrosion coating.

[0034] After the metal connecting plate 101 is installed in place, the surface of the button 203 is flush with the rear surface of the metal connecting plate 101;

[0035] The metal connecting plate 101 has a relief groove at the position corresponding to the button 203, and the depth of the relief groove is adapted to the protrusion height of the button 203;

[0036] The driving circuit is a UCC23313BDWYR chip. The VOUT pin of the UCC23313BDWYR chip is connected to the positive terminal of the coil of DC contactor body 1, and the VEE pin of the UCC23313BDWYR chip is connected to the negative terminal of the coil of DC contactor body 1.

[0037] The UCC23313BDWYR chip outputs a drive voltage through the VOUT pin, forming a loop with the VEE pin to directly control the on / off state of the coil current of DC contactor body 1. When VOUT outputs a high level, the coil of DC contactor body 1 is turned on; when VOUT outputs a low level, the coil of DC contactor body 1 is turned off, thereby controlling the contact of DC contactor body 1 to close and open.

[0038] This enables direct driving of the DC contactor body coil 1, reducing intermediate switching devices (such as MOSFETs), signal delay, and circuit complexity.

[0039] The protection circuit includes a TVS diode SMAJ26CA and a freewheeling diode SS54. The TVS diode SMAJ26CA is located between the positive and negative terminals of the power supply at the output of the UCC23313BDWYR chip and between the VOUT pin and the coil of the DC contactor body 1. The freewheeling diode SS54 is located between the VOUT pin and the coil of the DC contactor body 1.

[0040] The TVS diode SMAJ26CA breaks down rapidly when the voltage rises abnormally, clamping the voltage within a safe range (protecting the UCC23313BDWYR chip and the coil of DC contactor body 1). The freewheeling diode SS54 provides a release circuit for the reverse electromotive force generated by electromagnetic induction in the coil of DC contactor body 1 at the moment of disconnection, avoiding high voltage impact on the UCC23313BDWYR chip, preventing circuit damage due to overvoltage and reverse electromotive force, and improving system reliability.

[0041] The output signal of the control circuit is connected to the input pin of the UCC23313BDWYR chip, and drives the coil of DC contactor body 1 after internal logic processing and power amplification by the UCC23313BDWYR chip.

[0042] The low-voltage logic signal (high and low level) output by the control circuit (such as MCU) is processed by the internal logic of the UCC23313BDWYR chip and then converted into a current sufficient to drive the coil of DC contactor body 1 through the power amplifier module. This completes the conversion of "weak current controlling strong current" and realizes the conversion from control command to the action of the coil of DC contactor body 1, ensuring the timeliness of the response of DC contactor body 1.

[0043] The filter capacitors include 100nF C444 and 100nF C445;

[0044] The filter presents low impedance to high-frequency signals, can absorb high-frequency interference in the power supply, reduce the impact of noise on chip logic processing and drive output, and ensure stable circuit operation.

[0045] The UCC23313BDWYR chip can automatically reduce the drive current after the DC contactor body 1 is stably engaged.

[0046] The DC contactor body 1 requires a large current to ensure rapid action when it is engaged, and only a small current is needed to maintain the state after it is stably engaged. The UCC23313BDWYR chip reduces the output current through an internal adjustment mechanism, which reduces useless power consumption while ensuring functionality, reduces coil energy consumption and heat generation of the DC contactor body 1, improves module life and meets energy-saving requirements.

[0047] The UCC23313BDWYR chip is an isolated gate driver, which isolates the control circuit from the high-voltage drive circuit.

[0048] By using the isolation design (such as magnetic isolation or optical isolation) of the UCC23313BDWYR chip, the direct electrical connection between the control circuit (low-voltage logic section) and the drive circuit (high-voltage coil circuit) is cut off, avoiding high-voltage impacts or noise from affecting the normal operation of the control circuit, preventing high-voltage side interference from being conducted to the low-voltage control circuit, and ensuring system safety and anti-interference capability.

[0049] When the metal connecting plate 101 needs to be installed, press the button 203 first. The button 203 drives the pressing block 202 to slide inward along the guide block inside the DC contactor body 1. Since the pressing block 202 is a trapezoidal structure, its two inclined surfaces no longer press the two limiting blocks 205. At this time, the limiting blocks 205 move relative to each other and retract under the elastic force of the return spring 206, and retract from the connecting groove 2, releasing the obstruction to the inner cavity of the connecting groove 2.

[0050] Subsequently, the connecting block 201, which is fixedly connected to the metal connecting plate 101, is slidably inserted into the inner cavity of the T-shaped connecting groove 2 (since both the connecting groove 2 and the connecting block 201 are T-shaped structures, the sliding direction can be ensured to be stable). When the connecting block 201 is fully inserted into the connecting groove 2, the button 203 is released. Under the action of the reset force of the compression spring 204, the pressing block 202 slides outward along the guide block and resets. The two inclined surfaces of its trapezoidal structure re-contact the limiting block 205 (the end of the limiting block 205 corresponding to the pressing block 202 is rounded to reduce sliding friction). The two limiting blocks 205 are pushed to move in opposite directions and slide along the guide block. Finally, one end extends into the connecting groove 2, forming a clamping limit on the T-shaped connecting block 201, thus completing the installation and fixing of the metal connecting plate 101.

[0051] When it is necessary to disassemble the metal connecting plate 101, press the button 203 again to repeat the process of the pressing block 202 moving inward and the limiting block 205 retracting. At this time, the connecting block 201 is no longer constrained by the limiting block 205 and can be pulled out directly along the connecting groove 2 to realize the disassembly and replacement of the metal connecting plate 101.

[0052] The control flow of the control module of this DC contactor body 1 is as follows:

[0053] The high and low level signals (such as GPIO signals) output by the control circuit (such as a logic control unit containing an MCU) are connected to the input pins of the UCC23313BDWYR chip as control commands for the on / off of DC contactor body 1.

[0054] When the charging pile is not in operation, the control circuit outputs a low-level signal: After the UCC23313BDWYR chip receives the low level, the internal logic processing unit triggers the output to shut down, and its VOUT pin outputs a low level. The VEE pin remains connected to the negative terminal of the coil of DC contactor body 1. At this time, no current flows through the coil of DC contactor body 1, and the contacts do not close.

[0055] When the charging pile starts charging, the control circuit outputs a high-level signal: After the UCC23313BDWYR chip receives the high level, the internal power amplifier circuit starts, the VOUT pin outputs the drive voltage, and forms a loop with the VEE pin. The coil of the DC contactor body 1 is turned on, the contacts are attracted, and the circuit is connected.

[0056] Because the UCC23313BDWYR chip has adaptive current regulation capability, the chip outputs a peak pull current of 4.5A at the moment the DC contactor body 1 is energized, ensuring that the coil of the DC contactor body 1 is quickly energized and the contacts act quickly (response time ≤105ns), meeting the high real-time requirements.

[0057] After the contacts are stably engaged, the UCC23313BDWYR chip automatically reduces the drive current (by about 20% to 30%), reducing the coil energy consumption and heat generation of the DC contactor body 1, achieving energy saving and consumption reduction, while improving module stability.

[0058] TVS diodes SMAJ26CA are respectively configured between the positive and negative terminals of the power supply at the output terminal of the UCC23313BDWYR chip, and between the VOUT pin and the coil of the DC contactor body 1. When an abnormal high voltage occurs in the circuit (such as power fluctuation or external interference), the TVS diodes quickly break down and conduct, clamping the voltage within a safe range (reverse breakdown voltage 26V, maximum clamping voltage 45V), preventing damage to the chip and the coil of the DC contactor body 1.

[0059] The freewheeling diode SS54 is connected in parallel between the VOUT pin and the coil of DC contactor body 1. When DC contactor body 1 is disconnected, the coil of DC contactor body 1 generates a reverse electromotive force due to electromagnetic induction. The freewheeling diode SS54 provides a low impedance loop to guide and release the reverse current, avoiding high voltage impact on the UCC23313BDWYR chip and protecting the drive circuit.

[0060] Filter capacitors (100nF C444 and 100nF C445) are connected in parallel between the power supply pin of the UCC23313BDWYR chip and ground to filter out high-frequency noise and ripple in the power supply, ensure the stability of control signals and drive voltage, and reduce the impact of interference on logic processing.

[0061] The UCC23313BDWYR chip is an isolated gate driver with a basic isolation rating of 3.75kVRMS (compliant with UL1577 standards). It can achieve electrical isolation between the control circuit (low-voltage logic section) and the high-voltage drive circuit (coil circuit of DC contactor body 1), preventing high-voltage side interference from being conducted to the control side and ensuring system safety and anti-interference capability.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0063] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A contactor with an adjustment function, comprising: DC contactor body (1) and metal connecting plate (101); The feature is that: two connecting grooves (2) are symmetrically opened on the rear surface of the DC contactor body (1), and a connecting block (201) is slidably connected to the inner cavity of each connecting groove (2), and the metal connecting plate (101) is fixedly connected to the surface of the connecting block (201). The DC contactor body (1) has a pressing block (202) slidably connected inside through a guide block. One end of the pressing block (202) passes through the DC contactor body (1) and is fixedly connected to a button (203). A compression spring (204) is provided between the pressing block (202) and the inner wall of the DC contactor body (1). The DC contactor body (1) has two limiting blocks (205) symmetrically slidably connected inside by guide blocks. One end of each limiting block (205) extends into the connecting groove (2). Multiple reset springs (206) are provided between each limiting block (205) and the inner wall of the DC contactor body (1).

2. A contactor with an adjustment function according to claim 1, characterized in that: Both the connecting groove (2) and the connecting block (201) are T-shaped structures, and the extrusion block (202) is trapezoidal in shape. Each limiting block (205) has a rounded corner at one end of the surface of the extrusion block (202).

3. A contactor with an adjustment function according to claim 1, characterized in that: The connecting block (201) is fixed to the metal connecting plate (101) by welding, and the surface of the connecting block (201) is provided with anti-slip texture.

4. A contactor with an adjustment function according to claim 1, characterized in that: The limiting block (205) is a brass limiting block, and the end of the limiting block (205) extending into the connecting groove (2) is provided with a wear-resistant layer.

5. A contactor with an adjustment function according to claim 1, characterized in that: The surface of the button (203) is provided with an insulating rubber sleeve, and the surface of the rubber sleeve is provided with anti-slip protrusions. The surface of the compression spring (204) is provided with an anti-corrosion coating.

6. A contactor with an adjustment function according to claim 1, characterized in that: After the metal connecting plate (101) is installed in place, the surface of the button (203) is flush with the rear surface of the metal connecting plate (101).

7. A contactor with an adjustment function according to claim 1, characterized in that: The metal connecting plate (101) has a relief groove at the position corresponding to the button (203), and the depth of the relief groove is adapted to the protrusion height of the button (203).

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