Protection device for dual-power system of special vehicle

Abstract

The invention discloses a special vehicle dual-power system protection device which comprises an upper-mounted controller, a motor driving control module and an engine starting control module, and the upper-mounted controller is connected with the motor driving control module and the engine starting control module through cables. The motor driving control module is connected with a mains supply socket and a driving pump motor through cables, and the engine starting control module is connected with the upper controller through an engine starting control loop interface. Through cooperative use of the upper controller, the motor driving control module and the engine starting control module, automatic switching of a dual-power system is achieved, and misoperation of clients is reduced; main system control, arrangement and refitting are all carried out on an upper part, and only a signal interface needs to be reserved on a chassis, so that the problem of high difficulty in upper part refitting is solved; furthermore, the device is applied to special vehicles for parking operation, and can solve the problem that the cable is not broken.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, specifically to a protection device for a dual power system of a special-purpose vehicle. Background Technology

[0002] In recent years, with the rapid development of the national economy, the special-purpose vehicle industry has also experienced rapid growth. Special-purpose vehicles are diverse in type and operating conditions. For parking vehicles, the engine is only used to drive the superstructure during operation, generally taking power from neutral. The engine speed varies according to the superstructure's requirements, resulting in poor fuel economy. A secondary engine drive can be used for high-power superstructures, such as sweepers, but with stricter environmental requirements and upgraded emissions standards, the cost of installing secondary engines is significant. Using a superstructure motor drive, specifically a high-power DC motor, offers higher power output, lower cost, and is environmentally friendly, primarily used in pure electric vehicles. To address these technical issues, we have designed a dual-power system protection device for special-purpose vehicles. Summary of the Invention

[0003] The purpose of this invention is to provide a protection device for a dual-power system of special vehicles, which has the advantage of automatic switching between the two power systems and solves the problems of inconvenient switching, difficult modification, and safety risks caused by misoperation in parking operation vehicles that use a dual power system of electric motor drive and engine.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a dual power system protection device for special vehicles, comprising an upper structure controller, a motor drive control module, and an engine start control module. The upper structure controller is connected to the motor drive control module and the engine start control module respectively via cables. The motor drive control module is connected to a mains socket and a drive pump motor via cables. The engine start control module is connected to the upper structure controller via an engine start control circuit interface.

[0005] Preferably, the motor drive control module includes a motor start control relay KM3 and a mains power signal acquisition relay KM2. The motor start control relay KM3 is connected in series in the cable circuit between the mains power socket and the drive pump motor. The mains power signal acquisition relay KM2 will send a 24V signal to the upper device controller after the 380V mains power is turned on.

[0006] Preferably, the motor drive control module further includes a start switch SB102, a stop switch SB101, a motor start holding relay KM1, a motor start control relay KM3, and a thermal relay. The start switch SB102, the stop switch SB101, the control terminal of the motor start holding relay KM1, the contact terminal of the motor start control relay KM3, and the thermal relay are connected in series to form a motor start control circuit. The motor start holding relay KM1 has four contact terminals. One of them is connected in parallel with the start switch SB102 to achieve a holding function for the control circuit after startup. The other three are connected in series with the mains socket and the main power supply circuit of the drive pump motor to realize the switching of power supply to the drive pump motor.

[0007] Preferably, the drive pump motor is connected to an AC power socket via a cable, the AC power socket is connected to an external power source, the constant power end of the cable is connected in parallel with the motor start control relay KM3, the motor start control relay KM3 is controlled and connected by the superstructure controller, and the superstructure controller controls the motor start control relay KM3.

[0008] Preferably, the engine start control module includes an engine start protection relay K01 and an engine start circuit, wherein the engine start protection relay K01 is connected in series in the engine start circuit.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] This invention achieves automatic switching between dual power systems through the coordinated use of the superstructure controller, motor drive control module, and engine start control module, reducing customer misoperation. The main system control, layout, and modification are all located in the superstructure, and the chassis only needs to reserve signal interfaces, solving the problem of high difficulty in superstructure modification. Furthermore, when applied to special vehicles for parking operations, this invention can solve the safety risks of accidental cable breakage due to unconnected cables. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the dual-power protection device of the present invention.

[0012] In the diagram: 1. Upper structure controller; 2. Motor drive control module; 3. Engine start control module; 4. Mains power socket; 5. Drive pump motor; 6. Engine start control circuit interface; 7. Motor start control relay KM3; 8. Mains signal acquisition relay KM2; 9. Start switch SB102; 10. Stop switch SB101; 11. Thermal relay; 12. Motor start holding relay KM1; 13. Engine start protection relay K01. Detailed Implementation

[0013] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise explicitly specified and limited, the embodiments and features described in the embodiments of this application can be combined with each other. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0014] Please see Figure 1 A special vehicle dual power system protection device includes an upper structure controller 1, a motor drive control module 2, and an engine start control module 3. The upper structure controller 1 is connected to the motor drive control module 2 and the engine start control module 3 via cables. The motor drive control module 2 is connected to a mains socket 4 and a drive pump motor 5 via cables. The engine start control module 3 is connected to the upper structure controller 1 via an engine start control circuit interface 6.

[0015] The motor drive control module 2 includes a motor start control relay KM3 7 and a mains power signal acquisition relay KM2 8. The motor start control relay KM3 7 is connected in series in the cable circuit between the mains power socket 4 and the drive pump motor 5. The mains power signal acquisition relay KM2 8 will send a 24V signal to the upper controller 1 after the 380V mains power is turned on.

[0016] The motor drive control module 2 also includes a start switch SB102 9, a stop switch SB101 10, a motor start holding relay KM1 12, a motor start control relay KM37, and a thermal relay 11. The control terminals of the start switch SB102 9, the stop switch SB101 10, the motor start holding relay KM1 12, the contact terminals of the motor start control relay KM37, and the thermal relay 11 are connected in series to form a motor start control circuit. The motor start holding relay KM1 12 has four contact terminals. One terminal is connected in parallel with the start switch SB102 9 to maintain the control circuit after startup. The other three terminals are connected in series with the mains socket 4 and the main power supply circuit of the drive pump motor 5 to control the power supply to the drive pump motor 5. The thermal relay 11 is an automatic control device that uses the principle of current thermal effect to protect the motor from overload. Its core function is to prevent the motor windings from overheating and being damaged due to prolonged overload.

[0017] The drive pump motor 5 is connected to the mains socket 4 via a cable. The mains socket 4 is connected to an external power source. The constant power end of the cable is connected in parallel with the motor start control relay KM3 7. The motor start control relay KM3 7 is controlled and connected by the superstructure controller 1. The superstructure controller 1 controls the motor start control relay KM3 7. The motor start control circuit can be disconnected when the engine has speed, and the drive pump motor 5 will not start.

[0018] The engine start control module 3 includes an engine start protection relay K01 13 and an engine start circuit. The engine start protection relay K01 13 is connected in series in the engine start circuit. When the 380V mains socket 4 is not disconnected, the mains signal acquisition relay KM2 8 closes, and the upper controller 1 controls the engine start protection relay K01 13, preventing the engine from starting and keeping the vehicle immobile to avoid electric shock caused by broken cables. A relay is an electrical control device that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity (excitation quantity) reaches a specified requirement. It has an interactive relationship between the control system (also known as the input circuit) and the controlled system (also known as the output circuit). It is usually used in automated control circuits. It is actually an "automatic switch" that uses a small current to control a large current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in the circuit.

[0019] In use, the superstructure controller 1 controls the motor start control relay KM3 7, which can disconnect the motor start control circuit when the engine has speed, preventing the drive pump motor 5 from starting. If the 380V mains socket 4 is not disconnected, the mains signal acquisition relay KM2 8 closes, and the superstructure controller 1 controls the engine start protection relay K01 13, preventing the engine from starting and making the vehicle immobile, thus avoiding electric shock caused by broken cables. Furthermore, through the coordinated use of the superstructure controller 1, motor drive control module 2, and engine start control module 3, automatic switching between the dual power systems is achieved, reducing customer misoperation. The main system control, layout, and modification are all in the superstructure section, and the chassis only needs to reserve signal interfaces, solving the problem of high modification difficulty of the superstructure. Furthermore, this invention can be applied to special vehicles for parking operations, solving the safety risks of accidental cable breakage during operation if the cable is not disconnected.

[0020] In summary, this dual-power system protection device for special vehicles, through the coordinated use of the upper controller 1, the motor drive control module 2, and the engine start control module 3, solves the problems of inconvenient switching, difficult modification, and safety risks caused by misoperation in parking operation vehicles using both motor drive and engine dual-power systems.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A protection device for a dual-power system of a special vehicle, comprising an upper structure controller (1), a motor drive control module (2), and an engine start control module (3), characterized in that: The superstructure controller (1) is connected to the motor drive control module (2) and the engine start control module (3) via cables. The motor drive control module (2) is connected to the mains socket (4) and the drive pump motor (5) via cables. The engine start control module (3) is connected to the superstructure controller (1) via the engine start control circuit interface (6).

2. The special vehicle dual power system protection device according to claim 1, characterized in that: The motor drive control module (2) includes a motor start control relay KM3 (7) and a mains signal acquisition relay KM2 (8). The motor start control relay KM3 (7) is connected in series in the cable circuit between the mains socket (4) and the drive pump motor (5). The mains signal acquisition relay KM2 (8) will send a 24V signal to the upper controller (1) after the 380V mains power is turned on.

3. The special vehicle dual-power system protection device according to claim 1, characterized in that: The motor drive control module (2) also includes a start switch SB102 (9), a stop switch SB101 (10), a motor start holding relay KM1 (12), a motor start control relay KM3 (7), and a thermal relay (11). The control terminals of the start switch SB102 (9), the stop switch SB101 (10), the motor start holding relay KM1 (12), the contact terminals of the motor start control relay KM3 (7), and the thermal relay (11) are connected in series to form a motor start control circuit. The contact terminals of the motor start holding relay KM1 (12) have 4 paths. One path is connected in parallel with the start switch SB102 (9) to realize the holding function of the control circuit after startup. The other three paths are connected in series with the mains socket (4) and the main power supply circuit of the drive pump motor (5) to realize the opening and closing of the power supply to the drive pump motor (5).

4. The special vehicle dual power system protection device according to claim 1, characterized in that: The drive pump motor (5) is connected to the mains socket (4) via a cable. The mains socket (4) is connected to an external power source. The constant power end of the cable is connected in parallel with the motor start control relay KM3 (7). The motor start control relay KM3 (7) is controlled and connected by the upper device controller (1). The upper device controller (1) controls the motor start control relay KM3 (7).

5. A protection device for a dual-power system of a special-purpose vehicle according to claim 1, characterized in that: The engine start control module (3) includes an engine start protection relay K01 (13) and an engine start circuit, wherein the engine start protection relay K01 (13) is connected in series in the engine start circuit.

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