Energy-saving electromagnetic power-off switch with overcurrent monitoring function

Abstract

This utility model discloses an energy-saving electromagnetic power-off switch with overcurrent monitoring function, including a power-off switch body, within which a control circuit board is housed; a Hall effect detection ring is mounted on the control circuit board and positioned on the outer side of the power-off switch body; one end of the power-off switch body is connected to a primary power source, and the other end is connected to an electrical control box, which contains a contactor; the control circuit board has a power input port connected to a secondary power source in the vehicle; the control circuit board includes a control module, an output relay, and a current measurement unit, both electrically connected to the control module, and the current measurement unit is also electrically connected to the Hall effect detection ring; the control circuit board also includes a switch button and an indicator light. This utility model, by connecting to the secondary power source in the vehicle through the power input port, enables the overcurrent monitoring function to operate normally under various working conditions, offering good versatility and enhanced safety and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic power-off switch technology, specifically relating to an energy-saving electromagnetic power-off switch with overcurrent monitoring function. Background Technology

[0002] Electromagnetic power-off switches are commonly used protective switches and are widely used in circuits. When a winch is installed on a vehicle, the winch's electrical control box is often connected to the vehicle's battery. To ensure the winch's safe and normal operation, a protective switch is usually installed in the winch's power circuit. Existing patent CN220754347U discloses an electromagnetic power-off switch with overcurrent protection, including a control unit and a detection device for detecting the winch's power supply. The control unit includes a contactor for controlling the connection between the electric winch and the power supply, a control module, and an output relay; the detection device detects the output current value of the electric winch during operation. Existing electromagnetic power-off switches are often directly connected to the vehicle's battery. The winch draws a large current during operation, resulting in a significant voltage drop in the entire circuit. The control unit's operating voltage is typically around 5 volts and needs to be stable. Due to the large voltage drop in the entire circuit, the control unit's operating voltage is also lower during switching, causing the entire control unit to malfunction. Consequently, the overcurrent protection function fails to function properly, resulting in poor reliability. Therefore, it is necessary to design an energy-saving electromagnetic power-off switch with overcurrent monitoring functionality. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by designing an energy-saving electromagnetic power-off switch with overcurrent monitoring function. This invention features a separate power input on the main body of the power-off switch, which is connected to the second power source in the vehicle, thereby enabling the overcurrent monitoring function to be used normally under various operating conditions. It has good versatility and is safer and more reliable.

[0004] The objective of this invention is achieved through the following technical solution: an energy-saving electromagnetic power-off switch with overcurrent monitoring function, comprising a power-off switch body, within which a control circuit board electrically connected is disposed; a Hall effect detection ring electrically connected to the control circuit board is disposed on the outside of the power-off switch body; one end of the power-off switch body is connected to a first power source in the vehicle, and the Hall effect detection ring is sleeved and installed on the wire connected to the first power source; the other end of the power-off switch body is connected to an electrical control box, which contains a contactor; the control circuit board has a power input electrically connected to it, which is connected to a second power source in the vehicle; the control circuit board includes a control module, an output relay, and a current measuring unit, both electrically connected to the control module, and the current measuring unit is also electrically connected to the Hall effect detection ring; the control circuit board also includes a switch button and an indicator light.

[0005] Preferably, the output relay is electrically connected to the contactor; the contactor is electrically connected to the winch motor.

[0006] Preferably, the switch button and indicator light are electrically connected to the control circuit board, and the switch button and indicator light extend from the control circuit board to the surface of the power-off switch body.

[0007] Preferably, the rated voltage of both the first power supply and the second power supply is 12 volts.

[0008] Preferably, the power input is a two-core waterproof connector, and the power input is detachably connected to a second power source via a wire.

[0009] Preferably, the power-off switch body is provided with a mounting bracket that is fixedly connected to it.

[0010] Preferably, the control circuit board is also provided with a voltage regulator module electrically connected thereto.

[0011] Preferably, the control module is a microcontroller, and when the control module controls the output relay to work, the output relay controls the on / off state of the contactor.

[0012] Preferably, the rated current of the power-off switch body is 400 amperes, and the operating voltage range of the power-off switch body is 8.5-12 volts.

[0013] Preferably, the current measuring unit is configured to detect a current in the range of 100-500 amperes using a Hall effect detection ring.

[0014] Compared with the prior art, this utility model has the following beneficial effects: 1. By setting a power input on the main body of the power-off switch, and connecting it to the second power source in the vehicle through the power input, the second power source is not affected by the voltage drop of the first power source, and always provides a stable operating voltage to the control circuit board, making the control circuit board work more stably and reliably, while also being able to stably detect the operating current. 2. The power-on / off state of the control circuit board can be easily controlled by the switch button, and the power-on / off state of the main body of the power-off switch can be intuitively displayed by the indicator light. Attached Figure Description

[0015] Figure 1 This is a diagram showing the usage state of this utility model; Figure 2 A 3D view of the main body of the power-off switch; Figure 3 This is a top view of the main body of the power-off switch; Figure 4 This is a schematic diagram of the control circuit board; Figure 5 This is a schematic diagram illustrating the working principle of this utility model; The markings in the diagram are: 1. Power-off switch body; 2. Control circuit board; 3. Hall effect detection ring; 4. First power supply; 5. Electrical control box; 6. Power input port; 7. Switch button; 8. Indicator light; 9. Winch; 10. Mounting bracket. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: like Figures 1 to 5 As shown, this embodiment discloses an energy-saving electromagnetic power-off switch with overcurrent monitoring function, including a power-off switch body 1, and a control circuit board 2 electrically connected to the power-off switch body 1; a Hall effect detection ring 3 electrically connected to the control circuit board 2 is provided on the control circuit board 2, and the Hall effect detection ring 3 is disposed on the outside of the power-off switch body 1; one end of the power-off switch body 1 is connected to a first power supply 4 in the vehicle, and the Hall effect detection ring 3 is sleeved and installed on the wire connected to the first power supply 4; the other end of the power-off switch body 1 is connected to an electrical control box 5, and a contactor is provided in the electrical control box 5; a power input 6 electrically connected to the control circuit board 2 is provided, and the power input 6 is connected to a second power supply in the vehicle; the control circuit board 2 is provided with a control module, an output relay and a current measurement unit, the output relay and the current measurement unit are both electrically connected to the control module, and the current measurement unit is also electrically connected to the Hall effect detection ring 3; the control circuit board 2 is also provided with a switch button 7 and an indicator light 8.

[0017] The output relay is electrically connected to the contactor; the contactor is electrically connected to the motor of the winch 9. The switch button 7 and indicator light 8 are both electrically connected to the control circuit board 2, extending from the control circuit board 2 towards the surface of the power-off switch body 1. The rated voltage of both the first power supply 4 and the second power supply is 12 volts. The power inlet 6 is a two-core waterproof connector, detachably connected to the second power supply via a wire. The power-off switch body 1 is provided with a mounting bracket 10 fixedly connected to it. The control circuit board 2 is also provided with a voltage regulator module electrically connected to it. The control module is a microcontroller; when the control module controls the output relay to operate, the output relay controls the on / off state of the contactor. The rated current of the power-off switch body 1 is 400 amps, and the operating voltage range of the power-off switch body 1 is 8.5-12 volts. The current measurement unit is equipped with a Hall effect detection ring 3 with a current detection range of 100-500 amps.

[0018] The specific operation process of this embodiment is as follows: The power-off switch body 1 is fixed to the vehicle frame using the mounting bracket 10; the first power supply 4 is connected to the power-off switch body 1 via a wire, and the power-off switch body 1 is connected to the electrical control box 5 via another wire; simultaneously, the Hall effect detection ring 3 is fitted onto the wire connecting the first power supply 4; here, it is connected to the second power supply on the vehicle via the power input 6, and the second power supply needs to be installed separately on the vehicle; first, press the switch button 7, and a "click" sound can be heard inside the power-off switch body 1, and the indicator light 8 remains constantly lit; then press the switch button 7 again, and after hearing the "click" sound, the power-off switch body 1 stops working, and the indicator light 8 is turned off. Repeat this operation 3-5 times or more to ensure that the power-off switch body 1 can be properly engaged.

[0019] When the winch 9 needs to be used, the switch button 7 is turned on, energizing both the control circuit board 2 and the electrical control box 5. The control module then sends an electrical signal to the output relay, which in turn controls the contactor to engage, thus controlling the rotation of the winch 9. While the winch 9 is rotating normally, the Hall effect sensor ring 3 measures the real-time operating current of the winch 9. The current measurement unit feeds back the current value to the control module in real time. Initially, the operator pre-programs the operating current into the microcontroller, with a range of 100-500 amps. When the control module detects a current exceeding the preset value, it sends an electrical signal to the output relay, which in turn controls the contactor to disconnect, stopping the winch. The control circuit board is connected to a second power source via power input 6, ensuring that the control circuit board 2 always operates under a stable voltage, resulting in more reliable control.

[0020] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An energy-saving electromagnetic power-off switch with overcurrent monitoring function, comprising a power-off switch body (1), characterized in that, The main body (1) of the power-off switch is equipped with a control circuit board (2) electrically connected to it; the control circuit board (2) is equipped with a Hall detection ring (3) electrically connected to it, and the Hall detection ring (3) is located on the outside of the main body (1) of the power-off switch; one end of the main body (1) of the power-off switch is connected to the first power supply (4) of the car, and the Hall detection ring (3) is sleeved on the wire connected to the first power supply (4); the other end of the main body (1) of the power-off switch is connected to the electrical control box (5), and the electrical control box (5) is equipped with a contactor; the control circuit board (2) is equipped with a power input (6) electrically connected to it, and the power input (6) is connected to the second power supply of the car; the control circuit board (2) is equipped with a control module, an output relay and a current measurement unit, the output relay and the current measurement unit are electrically connected to the control module, and the current measurement unit is also electrically connected to the Hall detection ring (3); the control circuit board (2) is also equipped with a switch button (7) and an indicator light (8).

2. The energy-saving electromagnetic power-off switch with overcurrent monitoring function according to claim 1, characterized in that, The output relay is electrically connected to the contactor; the contactor is electrically connected to the motor of the winch (9).

3. The energy-saving electromagnetic power-off switch with overcurrent monitoring function according to claim 1, characterized in that, The switch button (7) and indicator light (8) are electrically connected to the control circuit board (2), and the switch button (7) and indicator light (8) extend from the control circuit board (2) toward the surface of the power-off switch body (1).

4. The energy-saving electromagnetic power-off switch with overcurrent monitoring function according to claim 1, characterized in that, The rated voltage of both the first power supply (4) and the second power supply is 12 volts.

5. The energy-saving electromagnetic power-off switch with overcurrent monitoring function according to claim 1, characterized in that, The power input (6) is a two-core waterproof plug-in, and the power input (6) is detachably connected to the second power source through a wire.

6. The energy-saving electromagnetic power-off switch with overcurrent monitoring function according to claim 1, characterized in that, The main body (1) of the power-off switch is provided with a mounting bracket (10) that is fixedly connected to it.

7. The energy-saving electromagnetic power-off switch with overcurrent monitoring function according to claim 1, characterized in that, The control circuit board (2) is also equipped with a voltage regulator module electrically connected to it.

8. The energy-saving electromagnetic power-off switch with overcurrent monitoring function according to claim 1, characterized in that, The control module is a microcontroller. When the control module controls the output relay to work, the output relay controls the on / off state of the contactor.

9. The energy-saving electromagnetic power-off switch with overcurrent monitoring function according to claim 1, characterized in that, The rated current of the power-off switch body (1) is 400 amperes, and the operating voltage range of the power-off switch body (1) is 8.5-12 volts.

10. The energy-saving electromagnetic power-off switch with overcurrent monitoring function according to claim 1, characterized in that, The current measurement unit is configured with a Hall detection ring (3) with a detection current range of 100-500 amperes.

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