Electric transmission four-wheel drive backfill compactor

Abstract

The utility model discloses an electric transmission four-wheel-drive backfill compactor which comprises an engine, a main controller and driving wheels and further comprises an FISG generator for converting mechanical energy of the engine into electric energy, an FISG generator controller for controlling the output power of the FISG generator and a high-voltage distribution box PDU. Four driving wheels are arranged, and the torque increasing devices are arranged on the driving wheels; the high-voltage distribution box PDU is connected with the four driving wheels through a traction motor and a speed reducer; the main controller is connected with the engine, the FISG generator controller, the high-voltage distribution box PDU and the four driving wheels. The FISG generator is used for converting mechanical energy into electric energy, the traction driving wheel drives the backfill compactor to walk, the transmission efficiency is high, energy is saved, and the environment is protected; the arrangement of the four drives and the torque booster is suitable for complex road conditions, the tractor and the speed reducer adjust the rotating speeds of the four driving wheels at the same time to be matched with the adjustment of the torque, the backfill compactor can get out of trouble in time, and the working efficiency is improved; the whole machine is stable in performance, energy-saving and environment-friendly.

Description

Technical Field

[0001] This utility model relates to a backfill compactor, and more particularly to an electric four-wheel drive backfill compactor. Background Technology

[0002] Backfill compactors mainly include several types such as road rollers, tampers, plate compactors, and impact compactors. They typically have significant weight and compaction capacity, used for leveling and compacting in road, bridge, or waste backfilling projects. With the continuous development of infrastructure construction, their demand is increasing, with approximately 600 backfill compactors sold globally each year. In actual use, complex road conditions and harsh construction environments cause problems with dual-drive control systems, leading to difficulties in movement or getting stuck, and slipping easily when encountering obstacles. Furthermore, most machines use high-power diesel engines as their power source. Due to their significant weight and compaction capacity, these engines have low transmission efficiency, high fuel consumption, and cause serious environmental pollution, hindering sustainable development. This is especially true when getting stuck or slipping, where the engine's transmission efficiency is even lower, fuel consumption is even higher, and more exhaust gases are produced. Some electrically driven road rollers also suffer from insufficient range to meet project requirements due to their significant weight and compaction capacity. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to improve the transmission efficiency of the engine, reduce energy consumption, and improve the power efficiency of the backfill compactor, so as to provide an electric four-wheel drive backfill compactor.

[0004] Technical Solution: The electric four-wheel drive backfill compactor of this utility model includes an engine, a main controller, and drive wheels. It also includes a FISG generator that converts the mechanical energy of the engine into electrical energy, a FISG generator controller for controlling the output power of the FISG generator, and a high-voltage distribution box (PDU). The drive wheels are provided with four wheels, and torque boosters are installed on the drive wheels. The high-voltage distribution box (PDU) is connected to the four drive wheels through a traction motor and a reducer. The main controller is connected to the engine, the FISG generator controller, the high-voltage distribution box (PDU), and the four drive wheels.

[0005] Furthermore, torque converters are installed on the drive wheels. By adjusting the torque of each drive wheel in conjunction with the speed adjustment, the backfill compactor can move normally under complex road conditions. When the backfill compactor gets stuck, the traction machine and reducer can quickly adjust the speed of the drive wheels, and in conjunction with the torque converters, adjust the torque of the drive wheels, quickly adjusting the four drive wheels to the appropriate speed and torque to get it out of trouble.

[0006] Furthermore, the drive wheel is also equipped with a motor controller for adjusting the speed or torque of the traction machine and the reducer; the main controller is connected to the drive wheel through the motor controller.

[0007] Furthermore, the main controller is equipped with a control module that collects and controls information from the engine, FISG generator controller, high-voltage distribution box PDU, and motor controller. The control module collects information from the engine, FISG generator controller, high-voltage distribution box PDU, and motor controller, and, based on actual road conditions such as the overall power, torque, and speed of the entire machine, adjusts the output parameters of each machine in a timely manner.

[0008] Furthermore, the main controller also includes a torque boosting control module that controls the torque booster of the drive wheels to increase driving force. The torque boosting control module controls the torque booster to enable the machine to quickly return to normal operation in situations involving complex road conditions or when the machine is stuck.

[0009] Furthermore, the main controller is equipped with an energy-saving module for adjusting engine speed and power output. Based on the information collected by the control module from the engine, FISG generator controller, high-voltage distribution box PDU, and motor controller, and combined with actual road condition information, the engine speed and output power are adjusted in a timely manner to achieve energy saving and emission reduction.

[0010] Furthermore, the high-voltage distribution box (PDU) is equipped with a capacitor for controlling its voltage stability. Stable voltage ensures stable operation of each controller, makes the adjustment of the drive wheel smoother, and reduces mechanical wear of the backfill compactor.

[0011] Furthermore, the present invention also provides that the two front drive wheels are connected via the front axle, the two rear drive wheels are connected via the rear axle, and the main controller is connected to the engine, FISG generator controller, high-voltage distribution box PDU and front and rear motor controllers to control the four drive wheels so that the backfill compactor can operate normally.

[0012] Beneficial effects: Compared with the prior art, this utility model has the following advantages: 1. Using a FISG generator to convert mechanical energy into electrical energy, and then further driving the backfill compactor to move, the transmission efficiency is high, energy saving and environmental protection are achieved; 2. The four-wheel drive and torque booster settings are more conducive to movement in complex road conditions. The traction machine and reducer simultaneously adjust the speed of the four drive wheels in conjunction with the torque adjustment, which helps the backfill compactor to get out of trouble in time and improves work efficiency; 3. The addition of a capacitor stabilizes the voltage of the high-voltage distribution box PDU, improving the stability of the driving force rotation; 4. The main controller coordinates the control of various components through the control module, torque booster control module and energy saving module, further improving the transmission efficiency and the working efficiency of the backfill compactor, and reducing energy consumption. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of another embodiment of the present invention. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0016] Example 1

[0017] like Figure 1 The electric four-wheel drive backfill compactor shown includes an engine 1, a FISG generator 2 that converts the mechanical energy of the engine 1 into electrical energy, a FISG generator controller 3 for controlling the output power of the FISG generator 2, and a high-voltage distribution box (PDU) 4 connected in sequence. The PDU 4 is connected via a first motor controller 7, a second motor controller 10, a third motor controller 13, and a fourth motor controller 16 to a first traction motor 8, a second traction motor 11, a third traction motor 14, and a fourth traction motor 17 for zoned driving of the first, second, third, and fourth drive wheels. The first, second, third, and fourth drive wheels are respectively equipped with a first reducer 9, a second reducer 12, a third reducer 15, and a fourth reducer 18. The main controller 6 is connected to the engine 1, the FISG generator controller 3, the PDU 4, and the first motor controllers 7, 10, 13, and 16 of the four drive wheels. The PDU 4 is equipped with a capacitor 5 for controlling its voltage stability. Each of the four drive wheels is equipped with a torque booster. The main controller 6 is equipped with a control module that collects information from the motor 1, FISG generator controller 3, high-voltage distribution box PDU 4 and the motor controllers of the four drive wheels and controls them; a torque booster control module that controls the torque boosters of the drive wheels to increase driving force; and an energy-saving module that adjusts the engine speed and power output.

[0018] During construction, the main controller 6 collects information from the engine 1, FISG generator controller 3, high-voltage distribution box PDU 4, and the motor controllers of the four drive wheels. Based on the collected information and actual working conditions, such as the overall power, torque, and speed of the machine, the control module of the main controller 6 controls the output performance of the engine 1, FISG generator controller 3, high-voltage distribution box PDU 4, and the motor controllers of the four drive wheels. This, combined with the torque-boosting control module and energy-saving module, enables the backfill compactor to meet various construction conditions.

[0019] During normal construction, the speed of the four traction motors is controlled to be the same.

[0020] When turning left, the speed of the first traction motor 8 is controlled to be lower than that of the second traction motor 11, and the speed of the third traction motor 14 is lower than that of the fourth traction motor 17. At this time, the speed of the first traction motor 8 and the third traction motor 14 is n1, the steering angle is α, the wheelbase is L, the wheel width is W, and the speed of the second traction motor 11 and the fourth traction motor 17 is n2. The relationship between the two speeds satisfies n2=L*(n1+W) / tanα, and the control deviation is controlled within ±10%.

[0021] When turning right, the speed of the first traction motor 8 is higher than that of the second traction motor 11, and the speed of the third traction motor 14 is higher than that of the fourth traction motor 17. At this time, the speed of the second traction motor 11 and the fourth traction motor 17 is n1, the steering angle is α, the wheelbase is L, the wheel width is W, and the speed of the first traction motor 8 and the third traction motor 14 is n2. The relationship between the two speeds satisfies n2=L*(n1+W) / tanα, and the control deviation is controlled within ±10%.

[0022] During the extrication process, the actual speeds of the four traction motors (first traction motor 8, second traction motor 11, third traction motor 14, and fourth traction motor 17) are monitored. For traction motors whose speeds are more than 30% below the target speed, torque increase control is implemented to maximize driving force and achieve extrication. At this time, the required speed of the entire machine is n. If any one of the four actual speeds (n1 for first traction motor 8, n2 for second traction motor 11, n3 for third traction motor 14, and n4 for fourth traction motor 17) is more than 30% below the overall machine speed n, the controller adjusts the torque to increase the torque; conversely, if any one of the four speeds is more than 30% below the overall machine speed n, the controller adjusts the torque to decrease the torque.

[0023] For different load conditions, the energy-saving module of the main controller 6 collects the torque and speed data of the four traction motors, calculates the power of the four traction motors, and finally calculates the power consumption of the whole machine, adjusts the speed and power output of engine 1, and achieves energy saving.

[0024] The aforementioned backfill compactor adopts four-wheel independent drive, which has a higher control cost, but strong driving capability and is suitable for various complex road conditions.

[0025] Example 2

[0026] Unlike Embodiment 1, the two front drive wheels are connected via the front axle 19, and the two rear drive wheels are connected via the rear axle 22. The high-voltage distribution box PDU 4 is connected to the front traction motor 20 and the rear traction motor 24 via the front motor controller 21 and the rear motor controller 23, respectively.

[0027] During construction, the main controller 6 collects information from the engine 1, FISG generator controller 3, high-voltage distribution box PDU 4, and front and rear motor controllers. Based on the collected information and actual working conditions, such as the overall power, torque, and speed of the machine, the control module of the main controller 6 controls the output performance of the engine 1, FISG generator controller 3, high-voltage distribution box PDU 4, and front and rear motor controllers. This, combined with the torque-boosting control module and energy-saving module, enables the backfill compactor to meet various construction conditions.

[0028] During normal construction, the speeds of the two traction motors are controlled to be the same.

[0029] When getting out of trouble, by monitoring the actual speed of the front traction motor 20 and the rear traction motor 24, the controller will increase the torque of the traction motor that is more than 30% below the target speed to maximize the driving force and get out of trouble; and decrease the torque of the traction motor that is more than 30% above the target speed to reduce unnecessary power consumption. At this time, the required speed of the whole machine is n, the actual speed of the front traction motor 20 is n1, and the actual speed of the rear traction motor 24 is n2. If either n1 or n2 is more than 30% below n, the controller will adjust the torque to increase the input torque. If either n1 or n2 is more than 30% above n, the controller will adjust the torque to decrease the input torque.

[0030] For different road conditions, the energy-saving module of the main controller 6 collects the torque and speed of the two traction motors, calculates the power of the two traction motors, and finally calculates the power consumption of the whole machine, adjusts the speed and power output of engine 1, and achieves energy saving while meeting various construction conditions.

[0031] The aforementioned backfill compactor adopts a dual-axle four-wheel drive, which has a simple structure and low control cost, but its driving capability is slightly inferior to that of Example 1.

Claims

1. An electrically driven four-wheel backfill compactor comprising an engine (1), a main controller (6) and drive wheels, characterized in that, It also includes FISG generator (2) which converts mechanical energy of engine (1) into electric energy, FISG generator controller (3) which controls output power of FISG generator (2) and high-voltage distribution box PDU (4); the four driving wheels are provided with torque multipliers; the high-voltage distribution box PDU (4) is connected with the four driving wheels through traction motors and speed reducers; the main controller (6) is connected with the engine (1), FISG generator controller (3), high-voltage distribution box PDU (4) and the four driving wheels.

2. The electrically driven four-wheel-drive backfill compactor of claim 1, wherein, The driving wheels are also provided with motor controllers for adjusting the rotating speed or torque of the traction motors and speed reducers; the main controller (6) is connected with the driving wheels through the motor controllers.

3. The electrically driven four-wheel-drive backfill compactor of claim 2, wherein, The main controller (6) is provided with a control module which collects information of the engine (1), FISG generator controller (3), high-voltage distribution box PDU (4) and motor controllers and controls them.

4. The electrically driven four-wheel-drive backfill compactor of claim 3, wherein, The main controller (6) also includes a torque multiplier control module which controls the torque multipliers of the driving wheels to increase driving force.

5. The electrically driven four-wheel-drive backfill compactor of claim 1 or 4, wherein, The main controller (6) is provided with an energy-saving module for adjusting the rotating speed and power output of the engine.

6. The electrically powered four-wheel-drive backfill compactor of claim 1, wherein, The high-voltage distribution box PDU (4) is provided with a capacitor (5) for controlling voltage stability.

7. The electrically driven four-wheel-drive backfill compactor of claim 1, wherein, The front two driving wheels are connected through a front axle (19) and the rear two driving wheels are connected through a rear axle (22). The main controller (6) is provided with an energy-saving module for adjusting the rotating speed and power output of the engine. The high-voltage distribution box PDU (4) is provided with a capacitor (5) for controlling voltage stability. The front two driving wheels are connected through a front axle (19) and the rear two driving wheels are connected through a rear axle (22).

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