Driving protection system mounted on electric watering cart

Abstract

The utility model relates to a top-mounted driving protection system of an electric watering cart, which comprises a chassis, a top-mounted water tank arranged at the upper end of the chassis, a power system, a driving system and a control system arranged at the lower end of the chassis, a top-mounted water pump arranged on the top-mounted water tank, and the control system connected with the top-mounted water pump and the driving system through the power system. The chassis is fixedly connected with the upper water tank, the driving motor is mechanically connected with the transmission, and a part of power output by the driving motor drives the chassis to walk; the other part of power drives the upper water pump through the transmission and the power takeoff installed on the transmission to complete watering operation of the upper water tank, the chassis motor provides power for parking watering and traveling watering of the vehicle, and meanwhile it is ensured that the upper water pump is not damaged due to overspeed overload or reverse rotation through control.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle technology, and in particular to a drive protection system for an electric sprinkler truck. Background Technology

[0002] In recent years, special-purpose vehicles, such as water sprinkler trucks, have gradually transitioned to new energy, with sanitation vehicles, as urban vehicles, showing a particularly significant shift. Commonly used electric water sprinkler truck superstructures mainly fall into two categories: one involves adding a motor system to the superstructure, converting the electrical energy provided by the chassis's integrated power supply into mechanical energy to drive the superstructure's water pump. This solution increases costs considerably due to the added motor, but the interaction and control with the chassis power supply is relatively simple. The other category, similar to diesel water sprinkler trucks, drives the superstructure's water pump through a power take-off (PTO) in the transmission. This solution increases costs less, but the characteristics of the electric motor differ significantly from those of a diesel engine. Power from the chassis motor means that operations such as parking, reversing, and shifting gears have a significant impact on the PTO's output power, making the control of the superstructure's stable operation more complex. Furthermore, factors such as motor reversal or excessive motor speed can cause the water pump to reverse or overload, damaging superstructure components or affecting their reliability. Utility Model Content

[0003] The purpose of this utility model is to provide a drive protection system for electric sprinkler trucks that addresses the shortcomings of existing technologies.

[0004] This utility model is achieved using the following technical solution:

[0005] An electric sprinkler truck upper drive protection system includes a chassis, an upper water tank is provided at the upper end of the chassis, and a power system, a drive system and a control system are provided at the lower end of the chassis. The upper water tank is equipped with an upper water pump, and the control system is connected to the upper water pump and the drive system through the power system.

[0006] Furthermore, the upper part of the chassis is also provided with a driver's cab, the driver's cab is provided with an accelerator pedal and an instrument panel, the instrument panel is provided with a power take-off switch and an indicator light, and the accelerator pedal, power take-off switch and indicator light are all connected to the control system.

[0007] Furthermore, the control system includes a vehicle controller (VCU) and a motor controller (MCU). The accelerator pedal, power take-off switch, and indicator lights are all connected to the vehicle controller (VCU), and the vehicle controller (VCU) is connected to the power system through the motor controller (MCU).

[0008] Furthermore, the power system includes a drive motor and a transmission. The power output end of the drive motor is connected to the power input end of the transmission, and the power output end of the transmission is connected to the drive system via a main drive shaft. The transmission is equipped with a power take-off (PTO), which is connected to the superstructure water pump via a superstructure drive shaft.

[0009] Furthermore, the drive system includes a drive axle connected to the main drive shaft, and the drive axle is provided with wheels.

[0010] Compared with the prior art, the present invention has the following beneficial technical effects:

[0011] The chassis is fixedly connected to the upper water tank, and the drive motor is mechanically connected to the transmission. Part of the power output drives the chassis to move; the other part of the power drives the upper water pump through the transmission and the power take-off unit installed on the transmission to complete the water spraying operation of the upper water tank. The chassis motor provides power for water spraying when the vehicle is parked and when it is driving. At the same time, the control ensures that the upper water pump is not damaged due to overspeed, overload or reverse rotation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the system structure of this utility model;

[0013] Figure 2 This is a structural schematic diagram of the electric sprinkler truck of this utility model.

[0014] Figure Labels

[0015] 1. Chassis; 2. Water tank for superstructure; 3. Instrument panel; 31. Power take-off switch; 32. Indicator light; 4. Accelerator pedal; 5. Vehicle control unit (VCU); 6. Motor controller (MCU); 7. Drive motor; 8. Transmission; 81. Power take-off; 9. Main drive shaft; 10. Drive axle; 11. Wheels; 12. Drive shaft for superstructure; 13. Water pump for superstructure. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort should fall within the protection scope of this utility model.

[0017] like Figures 1-2As shown, an electric sprinkler truck upper drive protection system includes a chassis 1, an upper water tank 2 is provided on the upper end of the chassis 1, and a power system, a drive system and a control system are provided on the lower end of the chassis 1. The upper water tank 2 is equipped with an upper water pump 13, and the control system is connected to the upper water pump 13 and the drive system through the power system.

[0018] The upper part of the chassis is also equipped with a cab, which is equipped with an accelerator pedal 4 and an instrument panel 3. The instrument panel 3 is equipped with a power take-off switch 31 and an indicator light 32. The accelerator pedal 4, the power take-off switch 31, and the indicator light 32 are all connected to the control system.

[0019] The control system includes a vehicle controller (VCU5) and a motor controller (MCU6). The accelerator pedal (4), power take-off switch (31), and indicator light (32) are all connected to the vehicle controller (VCU5). The vehicle controller (VCU5) is connected to the power system through the motor controller (MCU6).

[0020] The power system includes a drive motor 7 and a transmission 8. The power output end of the drive motor 7 is connected to the power input end of the transmission 8. The power output end of the transmission 8 is connected to the drive system through the main drive shaft 9. The transmission 8 is equipped with a power take-off unit 81, which is connected to the upper body water pump 13 through the upper body drive shaft 12.

[0021] The drive system includes a drive axle 10, which is connected to the main drive shaft 9, and the drive axle 10 is equipped with wheels 11.

[0022] The chassis 1 is connected and fixed to the upper water tank 2. The drive motor 7 is mechanically connected to the transmission 8. Part of the power output drives the chassis 1 to move; the other part of the power drives the upper water pump 13 through the transmission 8 and the power take-off 81 installed on the transmission 8 to complete the water spraying operation of the upper water tank 2.

[0023] The vehicle controller VCU5 is used to transmit, receive, and convert information with various vehicle controllers.

[0024] The motor controller MCU6 is used for signal transmission with the vehicle controller VCU5 and for adjusting the speed of the drive motor 7;

[0025] The power take-off switch 31 on the instrument panel 3 is used to perform the opening and closing operation of the power take-off 81, and the indicator light 32 is used to indicate whether the power take-off 81 is actually engaged or not engaged.

[0026] Accelerator pedal 4 is used to accelerate the vehicle. When the driver presses the accelerator pedal 4, the signal is transmitted to the vehicle controller VCU5. The vehicle controller VCU5 determines whether to transmit the acceleration signal to the motor controller MCU6 based on the vehicle logic, and then controls the drive motor 7 to accelerate.

[0027] The working process of this utility model is as follows:

[0028] When the vehicle starts and the high voltage is applied, and the vehicle controller VCU5 is activated, if the electric sprinkler truck needs to work, at this time, the power take-off switch 31 is turned on, and the vehicle controller VCU5 identifies the gear position of the transmission 8: when the transmission 8 is in N gear, the drive motor 7 speed is zero, the power take-off 81 is engaged, the indicator light 32 on the instrument panel 3 is lit, and the drive motor 7 does not move. At this time, the power take-off 81 is engaged; when the transmission 8 is in D gear / R gear, the power take-off 81 is not engaged, the indicator light 32 on the instrument panel 3 is not lit, and the drive motor 7 does not move. At this time, the power take-off 81 is not engaged.

[0029] When the power take-off 81 is activated, if the vehicle needs to perform parking water spraying, the transmission 8 is kept in neutral (N) gear, the driver presses the accelerator pedal 4, the vehicle controller VCU5 receives the signal from the accelerator pedal 4 and sends a speed increase command to the motor controller MCU6 through a message signal, the drive motor 7 drives the power take-off 81 to increase its speed, and the parking water tank 2 begins to spray water.

[0030] When the power take-off (PTO) 81 is activated, the vehicle needs to perform water spraying operations. The driver adjusts the transmission 8 to D gear, the PTO 81 remains engaged, and the indicator light 32 on the dashboard 3 remains lit. The driver presses the accelerator pedal 4, and after receiving the signal from the accelerator pedal 4, the vehicle controller VCU5 sends a speed increase command to the motor controller MCU6 through a message signal. The drive motor 7 drives the PTO 81 to increase its speed, and the vehicle speed increases synchronously. The water tank 2 then begins its water spraying operation.

[0031] When the vehicle is performing water spraying operations while parked / driving, in order to protect the superstructure water pump 13 from overload, a maximum speed of the drive motor 7 after the power take-off 81 is turned on is preset through the vehicle controller VCU5. If the drive motor 7 reaches the preset maximum speed after the power take-off 81 is turned on, the speed of the drive motor 7 will not increase if the accelerator pedal 4 is pressed again.

[0032] Since the electric vehicle reverses by reversing the drive motor 7, if the power take-off 81 continues to operate, it will cause the power take-off 81 to reverse synchronously, and the upper structure water pump 13 connected through the upper structure drive shaft 12 will also reverse, causing the upper structure water pump 13 to be damaged. Therefore, the vehicle does not support reversing water spraying operations.

[0033] When the power take-off 81 is activated, the driver shifts the transmission 8 gear from N to R. After receiving the R gear signal from the transmission 8, the vehicle controller VCU5 sends a stop working command to the motor controller MCU6. The drive motor 7 stops working, the indicator light 32 on the instrument panel 3 goes out, the power take-off 81 stops working, and the drive motor 7 does not respond when the accelerator pedal 4 is pressed.

[0034] When the power take-off 81 is activated, the driver shifts the transmission 8 gear from D to R. After receiving the R gear signal from the transmission 8, the vehicle controller VCU5 sends a stop command to the motor controller MCU6, the drive motor 7 stops working, the indicator light 32 on the instrument panel 3 goes out, the power take-off 81 stops working, and pressing the accelerator pedal 4 will not respond to the drive motor 7.

[0035] When the power take-off switch 31 is not turned on, the indicator light 32 does not light up. When the transmission is in neutral (N) gear 8 and the driver presses the accelerator pedal 4, the drive motor 7 does not move, the vehicle is stationary, and the power take-off 81 does not work.

[0036] When the power take-off switch 31 is not turned on, the indicator light 32 is not lit. When the transmission 8 is in D or R gear, the driver presses the accelerator pedal 4, the speed of the drive motor 7 increases, and the vehicle moves forward or backward. The power take-off 81 does not work, and the speed of the drive motor 7 is not affected by the preset speed, and can reach its maximum speed.

Claims

1. A drive protection system for an electric sprinkler truck, characterized in that, Includes a chassis (1), with an upper water tank (2) on the upper end of the chassis (1), and a power system, a drive system and a control system on the lower end of the chassis (1). The upper water tank (2) is equipped with an upper water pump (13), and the control system is connected to the upper water pump (13) and the drive system through the power system.

2. The drive protection system for the electric sprinkler truck according to claim 1, characterized in that, The upper part of the chassis is also provided with a driver's cab, which is equipped with an accelerator pedal (4) and an instrument panel (3). The instrument panel (3) is equipped with a power take-off switch (31) and an indicator light (32). The accelerator pedal (4), the power take-off switch (31) and the indicator light (32) are all connected to the control system.

3. The drive protection system for the electric sprinkler truck according to claim 2, characterized in that, The control system includes a vehicle controller (VCU) (5) and a motor controller (MCU) (6). The accelerator pedal (4), power take-off switch (31) and indicator light (32) are all connected to the vehicle controller (VCU) (5). The vehicle controller (VCU) (5) is connected to the power system through the motor controller (MCU) (6).

4. The drive protection system for the electric sprinkler truck according to claim 3, characterized in that, The power system includes a drive motor (7) and a transmission (8). The power output end of the drive motor (7) is connected to the power input end of the transmission (8). The power output end of the transmission (8) is connected to the drive system through the main drive shaft (9). The transmission (8) is provided with a power take-off (81). The power take-off (81) is connected to the upper body water pump (13) through the upper body drive shaft (12).

5. The drive protection system for the electric sprinkler truck according to claim 4, characterized in that, The drive system includes a drive axle (10) connected to the main drive shaft (9), and the drive axle (10) is provided with wheels (11).

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