CN209241202U - An electric drive system for a freight trailer - Google Patents

Abstract

The embodiment of the utility model discloses an electric drive system for a freight trailer, which belongs to the technical field of automobile drive. Electrically connected with the motor assembly, the motor assembly includes an electronic control system and a bidirectional motor, the electronic control system serves as the input end of the motor assembly, and the bidirectional motor serves as the output end of the motor assembly, The bidirectional motor is connected to the trailer wheel through the gear transmission mechanism. When the truck is accelerating or traveling uphill, the bidirectional motor converts the electric energy stored in the power supply system into mechanical energy to provide auxiliary driving force for the trailer; , the trailer wheel drives the two-way motor through the gear system to complete the recovery of braking energy, and at the same time the two-way motor acts as a load to provide additional braking kinetic energy to play a slowing role. The effect of increasing climbing and acceleration power and avoiding insufficient braking is achieved.

Description

An electric drive system for a freight trailer

technical field

The utility model relates to the technical field of automobile drive, in particular to an electric drive system of a freight trailer.

Background technique

A trailer in the traditional sense refers to a vehicle that is towed by the power of the car but not driven by itself. Long-distance trucks are composed of a main tractor and one or more trailers. As an important vehicle type for road transportation, it is inevitable to use this form of main trailer. It has the advantages of flexible transportation, large carrying capacity, and low transportation costs. .

However, there are still outstanding problems in trailer transportation. First, the power of the main tractor is insufficient when accelerating or climbing. In recent years, with the development of the transportation industry, it is common to increase the weight of the transported goods in order to reduce transportation costs. The large load of the truck leads to the lack of power of the main tractor when accelerating or climbing a slope, especially when climbing a large slope. The speed is slow and even difficult to climb. Second, when the truck is decelerating and driving downhill, the brakes are insufficient, especially when going downhill for a long time, continuous braking will cause the brake system to fail, which can easily cause safety accidents. At present, the commonly used drum brakes or disc brakes produce the braking effect through the principle of friction. After long-term use, the loss of parts will lead to a decrease in braking performance or failure, which will bring great safety hazards to traffic. Frequent replacement of parts will also improve the performance of the brakes. cost. Although the retarder can effectively solve this problem, it is not easy to be popularized because of its high cost and the inability to realize energy recovery. Third, the truck has a large loading capacity, a large inertia, and a large braking energy loss. When braking, the inertial kinetic energy is converted into a large amount of heat energy generated by the friction of parts, which cannot be recycled.

Therefore, improving the power performance, braking performance and energy efficiency of the truck has become a key and must be solved problem.

Contents of the invention

The purpose of the embodiment of the utility model is to provide an electric drive system of a freight trailer, which is used to solve the problems of insufficient power, insufficient braking and large energy loss of existing freight vehicles.

In order to achieve the above purpose, the technical solution of the embodiment of the utility model is an electric drive system of a freight trailer, the electric drive system of the freight trailer includes a motor assembly, a power supply system and a gear transmission mechanism, the power supply system and the The motor assembly is electrically connected, and the motor assembly includes an electric control system and a bidirectional motor, the electric control system is used as the input end of the motor assembly, the bidirectional motor is used as the output end of the motor assembly, and the bidirectional motor is used as the output end of the motor assembly. The motor is connected with the wheels of the trailer through the gear transmission mechanism.

As a further optimization, the power supply system includes a battery management system and an electric energy storage unit.

As a further optimization, the bidirectional motor is a generator motor. When the power supply system provides electric energy for the bidirectional motor, the bidirectional motor provides driving force for the wheels of the trailer; when the wheels of the trailer drive the bidirectional motor to rotate, the bidirectional motor The bidirectional motor provides electric energy for the power supply system.

As a further optimization, the power supply system is respectively connected to the electric control system and the bidirectional motor, and the electric control system is connected to the bidirectional motor.

As a further optimization, the line connection between the electric control system and the bidirectional motor is reversible.

As a further optimization, the gear transmission mechanism includes a speed reducer and a drive axle.

As a further optimization, the reducer is the input end of the gear transmission mechanism, the drive axle is the output end of the gear transmission mechanism, and the reducer is connected to the drive axle through a transmission shaft.

As a further optimization, the drive axle is the input end of the gear transmission mechanism, and the speed reducer is the output end of the gear transmission mechanism.

As a further optimization, two groups of bidirectional motors and gear transmission mechanisms are provided respectively, and each group of bidirectional motors and gear transmission mechanisms is respectively connected to a wheel of the trailer.

As a further optimization, the two-way motor and the gear transmission mechanism are arranged on the rotation shaft of the trailer wheel or in the hub of the trailer wheel.

The utility model has the following advantages:

The electric drive system of the freight trailer provided by the utility model patent is used as the auxiliary power system of the whole vehicle to improve the power performance of the whole vehicle and increase the climbing ability to ensure the driving safety of long-distance transportation. The gear transmission mechanism of the trailer increases the transmission ratio of the whole vehicle and improves the carrying capacity. The two-way motor of the trailer is controlled by the electronic control system. Using the principle of reversibility of the motor, it can be used as a driving motor and a generator motor to reduce the loss of mechanical braking. High-efficiency electric braking energy recovery achieves good energy saving and emission reduction Effect. At the same time of braking, the two-way motor can act as a retarder to assist in deceleration. The structure is simple, the braking performance is improved and the braking is not easy to fail, and the safety of the whole vehicle is increased.

Description of drawings

Fig. 1 and Fig. 2 are the schematic diagrams of the structure of the electric drive system of the freight trailer provided by embodiment 1, embodiment 2 and embodiment 3;

Fig. 3 is the structural representation of embodiment 1;

Fig. 4 is the structural representation of embodiment 2;

Fig. 5 is the structural representation of embodiment 3;

Fig. 6 is a schematic structural diagram of embodiment 4.

reference sign

1. Motor assembly; 11. Electric control system; 12. Bidirectional motor; 2. Power supply system; 21. Battery management system; 22. Electric energy storage unit; 3. Gear transmission mechanism; 31. Reducer; 32. Drive axle .

Detailed ways

The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

Example 1

An electric drive system for a freight trailer, with reference to Figures 1 to 3, includes a motor assembly 1, a power supply system 2, and a gear transmission mechanism 3, wherein the motor assembly 1 includes an electric control system 11 and a bidirectional motor 12, and the electric control system 11 As the input terminal of the motor assembly 1, the bidirectional motor 12 is used as the output terminal of the motor assembly 1. The bidirectional motor 12 adopts a generator motor, which can convert electrical energy into mechanical energy and convert mechanical energy into electrical energy. The power supply system 2 is respectively connected to the electric control system 11 and the bidirectional motor 12, and the electric control system 11 is connected to the bidirectional motor 12. The circuit connection between the electric control system 11 and the bidirectional motor 12 is reversible, and the power supply system 2 includes The electric energy storage unit 22 and the battery management system 21, the electric energy storage unit 22 includes but not limited to lithium batteries, lead-acid batteries and supercapacitors, the power supply system 2 can not only provide electric energy for the bidirectional motor 12, but also store the bidirectional motor 12 to generate of electric energy.

The driver of the main tractor sends an instruction as the input end of the motor assembly 1, the output end of the motor assembly 1 is connected to the input end of the gear transmission mechanism 3, and the output of the gear transmission mechanism 3 is finally transmitted to the wheels of the trailer to realize the control of the driving condition of the trailer .

Wherein, when the truck is accelerating or traveling uphill, the driver of the main tractor depresses the accelerator pedal and sends an instruction to the electronic control system 11, the power supply system 2 provides electric energy for the bidirectional motor 12, and the bidirectional motor 12 is used as a driving motor to convert the electric energy into mechanical energy , the output driving kinetic energy drives the gear transmission mechanism 3, and provides auxiliary driving force to the trailer through the wheels of the trailer.

Wherein, when the truck is decelerating or traveling downhill, the driver of the main tractor depresses the brake pedal or gives a downhill driving instruction, and sends an instruction to the electronic control system 11, and the inertial force of the trailer wheel drives the bidirectional motor 12, and the bidirectional motor 12 As a generator, the motor converts mechanical energy into electrical energy, and the electrical energy is rectified by the electric control system 11 and then stored in the power supply system 2 to complete energy recovery. At the same time, the bi-directional motor 12 serves as a load to provide additional braking kinetic energy to play a retarding role.

The gear transmission mechanism 3 includes but is not limited to a speed reducer 31 and a driving axle 32. The speed reducer 31 is used as the input end of the gear transmission mechanism 3 and is connected to the driving axle 32 through a transmission shaft. The driving axle 32 is used as the output end of the gear transmission mechanism 3 Install with the trailer wheel to form the drive axle 32 electric drive system of the freight trailer.

Example 2

As shown in Fig. 1, Fig. 2 and Fig. 4, embodiment 2 provides an electric drive system for a freight trailer, its structure is basically the same as that of embodiment 1, and only the differences will be described below.

The drive axle 32 is used as the input end of the gear transmission mechanism 3, and the two ends of the drive axle 32 are respectively equipped with a reducer 31, and the reducer 31 is installed as the output end of the gear transmission mechanism 3 with the wheels of the trailer to form the drive axle 32 electric drive system of the freight trailer. .

Example 3

As shown in Fig. 1, Fig. 2 and Fig. 5, embodiment 3 provides an electric drive system for a freight trailer, its structure is basically the same as that of embodiment 1, and only the differences will be described below.

In this embodiment, two groups of the bidirectional motor 12 and the gear transmission mechanism 3 are provided respectively, and each group of the bidirectional motor 2 and the gear transmission mechanism 3 is respectively connected to a wheel of the trailer. The gear transmission mechanism 3 is installed on the wheel shaft of the trailer and is located beside the wheel, forming a wheel-side electric drive system of the freight trailer.

Example 4

As shown in Fig. 1, Fig. 2 and Fig. 6, embodiment 4 provides an electric drive system for a freight trailer, its structure is basically the same as that of embodiment 1, and only the differences will be described below.

In this embodiment, the installation positions of the bidirectional motor 12 and the gear transmission mechanism 3 are located inside the hub of the trailer wheel, and the output end of the gear transmission mechanism 3 is installed on the hub of the trailer wheel to form the hub electric drive system of the freight trailer.

Although the utility model has been described in detail with general description and specific examples above, some modifications or improvements can be made on the basis of the utility model, which will be obvious to those skilled in the art. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the utility model all belong to the protection scope of the utility model.

Claims (10)

1. An electric drive system of a freight trailer, characterized in that, the electric drive system of the freight trailer comprises a motor assembly (1), a power supply system (2) and a gear transmission mechanism (3), and the power supply system (2) ) is electrically connected with the motor assembly (1), the motor assembly (1) includes an electric control system (11) and a bidirectional motor (12), and the electric control system (11) is used as the motor assembly (1) The input end, the bidirectional motor (12) is used as the output end of the motor assembly (1), and the bidirectional motor (12) is connected to the wheels of the trailer through the gear transmission mechanism (3). 2. The electric drive system of a freight trailer according to claim 1, characterized in that the power supply system (2) includes a battery management system (21) and an electric energy storage unit (22). 3. The electric drive system of a freight trailer according to claim 1, characterized in that, the bidirectional motor (12) is a generator motor, when the power supply system (2) provides electric energy for the bidirectional motor (12) , the bidirectional motor (12) provides driving force for the trailer wheels; when the trailer wheels drive the bidirectional motor (12) to rotate, the bidirectional motor (12) provides electric energy for the power supply system (2). 4. The electric drive system of a freight trailer according to claim 1, characterized in that, the power supply system (2) is respectively connected to the electric control system (11) and the bidirectional motor (12), so that The electric control system (11) is connected with the bidirectional motor (12) again. 5. The electric drive system of a freight trailer according to claim 4, characterized in that the line connection between the electric control system (11) and the bidirectional motor (12) is reversible. 6. The electric drive system of a freight trailer according to claim 1, characterized in that, the gear transmission mechanism (3) comprises a speed reducer (31) and a drive axle (32). 7. The electric drive system of the freight trailer according to claim 6, characterized in that, the speed reducer (31) is the input end of the gear transmission mechanism (3), and the drive axle (32) is the gear transmission mechanism ( 3) at the output end, the reducer (31) is connected with the drive axle (32) through a transmission shaft. 8. The electric drive system of a freight trailer according to claim 6, characterized in that, the drive axle (32) is the input end of the gear transmission mechanism (3), and the reducer (31) is a gear transmission The output end of mechanism (3). 9. The electric drive system of a freight trailer according to claim 1, characterized in that, two groups of the bidirectional motor (12) and the gear transmission mechanism (3) are respectively arranged, and each group of the bidirectional motor (12) and the gear The transmission mechanism (3) is respectively connected with a wheel of the trailer. 10 . The electric drive system of a freight trailer according to claim 9 , characterized in that, the bidirectional motor ( 12 ) and the gear transmission mechanism ( 3 ) are arranged on the trailer wheel shaft or in the trailer wheel hub. 11 .