Hydraulic control circuit for snow plow

Abstract

The utility model relates to a snow removing shovel hydraulic control circuit, including diode D1, diode D2, MOS tube Q1 and electric capacity C1, diode D1 anode connects 12V voltage, diode D1's cathode connects the first end of coil L1, coil L1 second end connects the drain of MOS tube Q1, the source of MOS tube Q1 is grounded, and the gate of MOS tube Q1 is used for receiving the PWM signal of main control chip output, diode D2's anode connects the second end of coil L1, and the cathode of diode D2 connects the positive pole of electric capacity C1, and the negative pole of electric capacity C1 is grounded, and coil L1 still is connected in series on the fast drive branch, and the fast drive branch provides the fast conduction voltage for coil L1, and the fast conduction voltage is greater than 12V, through above -mentioned technical scheme, the technical problem that the snow removing shovel hydraulic control efficiency is low, and the effect is poor in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of snow removal technology, specifically to a hydraulic control circuit for a snowplow. Background Technology

[0002] In hydraulically driven equipment such as snowplows, precise control of the hydraulic system is crucial. The solenoid valve, as a key component controlling hydraulic flow and pressure, directly affects the snowplow's performance. Traditional hydraulic control circuits often use simple switching control to drive the solenoid valve coil, opening and closing the valve by directly switching the power supply on and off.

[0003] However, this method makes it difficult to flexibly adjust the opening and closing speed of the solenoid valve. Due to the lack of a rapid drive mechanism and reliance on conventional voltage power supply, the solenoid valve coil conducts slowly, resulting in a sluggish response from the hydraulic system and affecting the working efficiency of the snowplow. Utility Model Content

[0004] This invention proposes a hydraulic control circuit for snowplows, which solves the technical problems of low efficiency and poor performance of existing snowplow hydraulic control.

[0005] The technical solution of this utility model is as follows:

[0006] A hydraulic control circuit for a snowplow, used to control the solenoid valve coil L1 in a hydraulic device, includes diode D1, diode D2, MOSFET Q1, and capacitor C1. The anode of diode D1 is connected to a 12V voltage, the cathode of diode D1 is connected to the first terminal of coil L1, the second terminal of coil L1 is connected to the drain of MOSFET Q1, the source of MOSFET Q1 is grounded, and the gate of MOSFET Q1 is used to receive the PWM signal output by the main control chip. The anode of diode D2 is connected to the second terminal of coil L1, the cathode of diode D2 is connected to the positive terminal of capacitor C1, and the negative terminal of capacitor C1 is grounded.

[0007] It also includes a fast drive branch, in which the coil L1 is connected in series, and the fast drive branch provides a fast turn-on voltage to the coil L1, the fast turn-on voltage being greater than 12V.

[0008] Furthermore, the fast turn-on voltage is 24V.

[0009] Furthermore, the fast drive branch includes diode D3, diode D4, MOSFET Q2, and transistor Q3. The anode of diode D4 is connected to a 12V voltage, the cathode of diode D4 is connected to the collector of transistor Q3 through resistor R1, the base of transistor Q3 receives the con signal output by the main control chip through resistor R2, the emitter of transistor Q3 is grounded, the collector of transistor Q3 is connected to the gate of MOSFET Q2, the source of MOSFET Q2 is connected to the cathode of diode D4, the source of MOSFET Q2 is also connected to the positive terminal of capacitor C1, the positive terminal of capacitor C1 is connected to the fast turn-on voltage, the drain of MOSFET Q2 is connected to the anode of diode D3, and the cathode of diode D3 is connected to the first terminal of coil L1.

[0010] Furthermore, it also includes transistors Q4 and Q5, resistors R3 and R4. The first end of resistor R4 receives the PWM signal output by the main control chip, and the second end of resistor R4 is connected to the base of transistor Q4 and the base of transistor Q5. The collector of transistor Q4 is connected to a 12V voltage, the emitter of transistor Q4 is connected to the emitter of transistor Q5, the collector of transistor Q5 is grounded, and the emitter of transistor Q4 is connected to the gate of MOSFET Q1 through resistor R3.

[0011] Furthermore, it also includes a Zener diode U2, which is connected in parallel with the capacitor C1.

[0012] Furthermore, it also includes a resistance wire U1, which is connected in series between the second end of the coil L1 and the drain of the MOS transistor Q1.

[0013] Furthermore, it also includes a light-emitting diode LED1 and a resistor R5. The anode of the light-emitting diode LED1 is connected to the first end of the coil L1, and the cathode is connected to the second end of the coil L1 through the resistor R5.

[0014] The working principle and beneficial effects of this utility model are as follows:

[0015] In this invention, the main control chip outputs a PWM signal to the gate of MOSFET Q1 to control its on / off state. When MOSFET Q1 is turned on, current flows in through the anode of diode D1, out through the cathode to the first terminal of coil L1, then through the second terminal of coil L1, the drain of MOSFET Q1, and finally to the source, forming a circuit. At this time, the fast drive branch provides a fast turn-on voltage greater than 12V to coil L1, accelerating its conduction. When MOSFET Q1 is turned off, coil L1 generates a reverse electromotive force, diode D2 turns on, and the energy of the reverse electromotive force is released through capacitor C1, preventing damage to circuit components. By providing a fast turn-on voltage to coil L1 through the fast drive branch, the solenoid valve coil L1 can respond quickly, accelerating the action speed of the snowplow hydraulic device and improving snow removal efficiency.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a circuit diagram of a hydraulic control circuit for a snowplow in this utility model. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0019] Example 1

[0020] This embodiment proposes a hydraulic control circuit for a snowplow, used to control the solenoid valve coil L1 in the hydraulic device, such as... Figure 1 As shown, the device includes diode D1, diode D2, MOSFET Q1, and capacitor C1. The anode of diode D1 is connected to a 12V voltage, the cathode of diode D1 is connected to the first terminal of coil L1, the second terminal of coil L1 is connected to the drain of MOSFET Q1, the source of MOSFET Q1 is grounded, and the gate of MOSFET Q1 is used to receive the PWM signal output by the main control chip. The anode of diode D2 is connected to the second terminal of coil L1, the cathode of diode D2 is connected to the positive terminal of capacitor C1, and the negative terminal of capacitor C1 is grounded.

[0021] It also includes a fast drive branch, in which the coil L1 is connected in series, and the fast drive branch provides a fast turn-on voltage to the coil L1, the fast turn-on voltage being greater than 12V.

[0022] In this embodiment, the main control chip outputs a PWM signal to the gate of MOSFET Q1 to control its on / off state. When MOSFET Q1 is turned on, current flows in through the anode of diode D1, out through the cathode to the first terminal of coil L1, then through the second terminal of coil L1, the drain of MOSFET Q1, and finally to the source, forming a loop. At this time, the fast drive branch provides a fast turn-on voltage greater than 12V to coil L1, accelerating its conduction. When MOSFET Q1 is turned off, coil L1 generates a reverse electromotive force, diode D2 turns on, and the energy of the reverse electromotive force is released through capacitor C1, preventing damage to circuit components.

[0023] By providing a fast-acting voltage to coil L1 through the fast-drive branch, the solenoid valve coil L1 can respond quickly, accelerating the action speed of the snowplow hydraulic device and improving snow removal efficiency. At the same time, the circuit composed of diode D2 and capacitor C1 can effectively release the reverse electromotive force generated when coil L1 is cut off, protecting other components in the circuit, extending the service life of the circuit, and ensuring the stable and reliable operation of the snowplow hydraulic control circuit.

[0024] In one implementation, the fast turn-on voltage is 24V.

[0025] Furthermore, such as Figure 1 As shown, the fast drive branch includes diode D3, diode D4, MOSFET Q2, and transistor Q3. The anode of diode D4 is connected to a 12V voltage. The cathode of diode D4 is connected to the collector of transistor Q3 through resistor R1. The base of transistor Q3 receives the con signal output by the main control chip through resistor R2. The emitter of transistor Q3 is grounded. The collector of transistor Q3 is connected to the gate of MOSFET Q2. The source of MOSFET Q2 is connected to the cathode of diode D4. The source of MOSFET Q2 is also connected to the positive terminal of capacitor C1. The positive terminal of capacitor C1 is connected to the fast turn-on voltage. The drain of MOSFET Q2 is connected to the anode of diode D3. The cathode of diode D3 is connected to the first terminal of coil L1.

[0026] In this embodiment, for the control of the solenoid valve coil L1, under normal operating conditions, the main control chip outputs a PWM signal to the gate of the MOSFET Q1. When the MOSFET Q1 is turned on, current flows from the anode of diode D1, through the cathode to the first terminal of coil L1, and then from the second terminal of coil L1 through the drain of MOSFET Q1 to the source ground, forming a conventional current loop. The fast drive branch is the key to achieving fast turn-on of coil L1. The main control chip outputs a con signal, which is transmitted to the base of transistor Q3 through resistor R2. When the con signal turns on transistor Q3, its collector potential decreases, which in turn causes the gate potential of MOSFET Q2 to decrease through resistor R1, turning on MOSFET Q2. At this time, a rapid turn-on voltage of 24V (the voltage connected to the positive terminal of capacitor C1) is quickly applied to the first terminal of coil L1 through the source to drain of MOSFET Q2, and then through the anode to cathode of diode D3, providing coil L1 with a voltage greater than the normal 12V, thus enabling it to conduct rapidly. When the con signal turns off transistor Q3, MOSFET Q2 also turns off, and the rapid drive branch stops providing a rapid turn-on voltage to coil L1. Simultaneously, when MOSFET Q1 turns off, the reverse electromotive force generated by coil L1 is released into capacitor C1 through diode D2, protecting other components in the circuit.

[0027] The fast-drive branch provides a 24V fast-turn-on voltage, which, compared to the conventional 12V voltage, provides a stronger driving capability for the solenoid valve coil L1. This allows coil L1 to reach the conduction state more quickly, thereby accelerating the action response speed of the snowplow hydraulic device. When faced with sudden snowfall or when the snowplow status needs to be adjusted quickly, the operation can be completed more promptly, improving the flexibility and efficiency of snow removal work.

[0028] The protection circuit composed of diode D2 and capacitor C1 effectively absorbs the reverse electromotive force generated when coil L1 is cut off, preventing it from causing voltage surges and damage to other circuit components. Simultaneously, the diodes D3 and D4, MOSFET Q2, and transistor Q3 in the fast-drive branch work together, ensuring stable and reliable fast-drive operation through reasonable signal control and current conduction path design. This prevents the introduction of fast-turn-on voltage from negatively impacting the overall circuit stability, extending the lifespan of components, reducing equipment failure rates, and guaranteeing the long-term stable operation of the snowplow's hydraulic control circuit.

[0029] Furthermore, such as Figure 1As shown, it also includes transistors Q4 and Q5, resistors R3 and R4. The first end of resistor R4 receives the PWM signal output by the main control chip, and the second end of resistor R4 is connected to the base of transistor Q4 and the base of transistor Q5. The collector of transistor Q4 is connected to a 12V voltage, the emitter of transistor Q4 is connected to the emitter of transistor Q5, the collector of transistor Q5 is grounded, and the emitter of transistor Q4 is connected to the gate of MOSFET Q1 through resistor R3.

[0030] In this embodiment, the PWM signal output by the main control chip is simultaneously transmitted to the bases of transistors Q4 and Q5 via resistor R4. When the PWM signal is high, transistor Q4 is turned on and transistor Q5 is turned off. The 12V voltage flows from the collector to the emitter of transistor Q4, and then through resistor R3 to the gate of MOSFET Q1, turning on MOSFET Q1. When the PWM signal is low, transistor Q4 is turned off and transistor Q5 is turned on. The gate of MOSFET Q1 flows from the emitter to the collector of transistor Q5 and is grounded, turning on MOSFET Q1. This push-pull circuit composed of transistors Q4 and Q5 enhances the driving capability of the gate of MOSFET Q1, improving signal transmission efficiency and stability.

[0031] Furthermore, such as Figure 1 As shown, the circuit also includes a Zener diode U2, which is connected in parallel with the capacitor C1. When the voltage across capacitor C1 exceeds the Zener diode U2's voltage regulation value, the Zener diode U2 conducts, stabilizing the voltage across capacitor C1 within a safe range and preventing overvoltage from damaging circuit components.

[0032] Furthermore, such as Figure 1 As shown, it also includes a resistance wire U1, which is connected in series between the second end of the coil L1 and the drain of the MOSFET Q1. The resistance wire U1 is connected in series between the second end of the inductor L1 (i.e., the coil L1) and the drain of the MOSFET Q1. It can limit current and divide voltage, preventing excessive current from impacting components such as the MOSFET Q1, and can also balance the voltage distribution in the circuit to a certain extent.

[0033] Furthermore, such as Figure 1As shown, it also includes a light-emitting diode (LED1) and a resistor R5. The anode of the LED1 is connected to the first terminal of the coil L1, and the cathode is connected to the second terminal of the coil L1 through the resistor R5. The LED1 and the resistor R5 form an indicator circuit. When current flows through the coil L1, the LED1 will light up, visually displaying the working status of the coil L1 and facilitating the operator's understanding of the operation of the snowplow hydraulic device.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hydraulic control circuit for a snowplow, used to control the coil L1 of a solenoid valve in a hydraulic device, characterized in that, The system includes diodes D1 and D2, a MOSFET Q1, and a capacitor C1. The anode of diode D1 is connected to a 12V voltage, the cathode of diode D1 is connected to the first terminal of coil L1, the second terminal of coil L1 is connected to the drain of MOSFET Q1, the source of MOSFET Q1 is grounded, and the gate of MOSFET Q1 is used to receive the PWM signal output by the main control chip. The anode of diode D2 is connected to the second terminal of coil L1, the cathode of diode D2 is connected to the positive terminal of capacitor C1, and the negative terminal of capacitor C1 is grounded. It also includes a fast drive branch, in which the coil L1 is connected in series, and the fast drive branch provides a fast turn-on voltage to the coil L1, the fast turn-on voltage being greater than 12V.

2. The hydraulic control circuit for a snowplow according to claim 1, characterized in that, The fast turn-on voltage is 24V.

3. The hydraulic control circuit for a snowplow according to claim 1, characterized in that, The fast drive branch includes diode D3, diode D4, MOSFET Q2, and transistor Q3. The anode of diode D4 is connected to a 12V voltage. The cathode of diode D4 is connected to the collector of transistor Q3 through resistor R1. The base of transistor Q3 receives the con signal output by the main control chip through resistor R2. The emitter of transistor Q3 is grounded. The collector of transistor Q3 is connected to the gate of MOSFET Q2. The source of MOSFET Q2 is connected to the cathode of diode D4. The source of MOSFET Q2 is also connected to the positive terminal of capacitor C1. The positive terminal of capacitor C1 is connected to the fast turn-on voltage. The drain of MOSFET Q2 is connected to the anode of diode D3. The cathode of diode D3 is connected to the first terminal of coil L1.

4. The hydraulic control circuit for a snowplow according to claim 1, characterized in that, It also includes transistors Q4 and Q5, resistors R3 and R4. The first end of resistor R4 receives the PWM signal output by the main control chip, and the second end of resistor R4 is connected to the base of transistor Q4 and the base of transistor Q5. The collector of transistor Q4 is connected to a 12V voltage, the emitter of transistor Q4 is connected to the emitter of transistor Q5, the collector of transistor Q5 is grounded, and the emitter of transistor Q4 is connected to the gate of MOSFET Q1 through resistor R3.

5. The hydraulic control circuit for a snowplow according to claim 1, characterized in that, It also includes a Zener diode U2, which is connected in parallel with the capacitor C1.

6. The hydraulic control circuit for a snowplow according to claim 1, characterized in that, It also includes a resistance wire U1, which is connected in series between the second end of the coil L1 and the drain of the MOS transistor Q1.

7. The hydraulic control circuit for a snowplow according to claim 1, characterized in that, It also includes a light-emitting diode LED1 and a resistor R5. The anode of the light-emitting diode LED1 is connected to the first end of the coil L1, and the cathode is connected to the second end of the coil L1 through the resistor R5.

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