Distributed driving system configuration of electric transmission vehicle

Abstract

The invention provides a distributed driving system structure of an electric transmission vehicle. The distributed driving system structure comprises a driving motor, a hub reduction gear, a brake disc, brake calipers, a pressure regulator, a master cylinder, a brake controller, a filter and a connecting flange plate. The output end of a driving motor of the driving system, a hub reduction gear and a brake are coaxially arranged. A double-motor double-side independent driving mode is adopted, motors with different power densities are reasonably selected, and wheel reducers are matched, so that the driving system works in a reasonable working range. The power output part, the brake disc and the brake calipers of the driving system are arranged outside the vehicle body, the wire outlet end of the driving motor, the water inlet and the water outlet and the like are arranged in the vehicle, the environmental adaptability of the braking device and the driving motor can be improved, and the characteristics of compact structure and small size are achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of distributed drive systems for electric vehicles, and specifically relates to a configuration of a distributed drive system for electric vehicles. Background Technology

[0002] Electric drive technology refers to the technology that uses an engine-generator set and battery pack to power a drive motor system to complete power transmission during vehicle movement, realizing various functions involved in the vehicle's tactical mobility. Compared with traditional mechanical transmission systems, electric drive systems have many advantages. Currently, my country's unmanned special vehicles are still in a stage of rapid development. The drive system differs greatly from that of traditional combat vehicles. As a key subsystem for vehicle power output and braking, it consists of numerous components, has a complex structure, and its system configuration is not yet mature. Therefore, it is necessary to propose a reasonable layout and structural design that can not only meet the requirements of vehicle lightweighting and integration, but also improve the reliability of the drive system and reduce the space occupied in the vehicle interior. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] This invention proposes a distributed drive system configuration for electric vehicles to address the technical challenges of achieving a rational layout of the drive motor, wheel-side reducers, and brakes through integrated structural design, thereby improving the utilization rate of the vehicle's interior space and ensuring the functionality and environmental adaptability of each component.

[0005] (II) Technical Solution

[0006] To address the aforementioned technical problems, this invention proposes a distributed drive system configuration for electric vehicles. This configuration includes a drive motor, wheel-side reducers, brake discs, brake calipers, a pressure regulator, a master cylinder, a brake controller, a filter, and a connecting flange.

[0007] The drive motor is fastened to the vehicle body via a flange;

[0008] The wheel-side reducer is connected to the drive wheel via a connecting flange. The reducer consists of a single-stage planetary reduction mechanism, with the sun gear shaft meshing with planetary gears and connecting to a gear ring fixed to the drive motor. The drive motor is directly connected to the input end of the wheel-side reducer, achieving speed reduction and torque increase through the single-stage planetary gear reduction. Torque is transmitted from the drive motor to the wheel-side reducer via the sun gear shaft. The wheel-side reducer maintains a constant transmission ratio, increasing the torque transmitted from the drive motor to the drive wheel at a fixed ratio and correspondingly reducing the speed of the drive wheel. The drive motor converts electrical energy into mechanical energy, which is then transmitted to the drive wheel via the wheel-side reducer, achieving a stable output of torque and speed from the drive motor to the drive wheel.

[0009] The brake disc is fixed to the housing of the wheel-side reducer, and the brake caliper is fixed to the housing of the drive motor by bolts. The vehicle's service braking and parking braking functions are realized through the brake disc and brake caliper. The brake disc and the wheel-side reducer are arranged coaxially, and the power is transmitted to the drive wheel through a single-stage planetary gear.

[0010] The pressure regulator, master cylinder, brake controller, and filter are all mounted on the vehicle body. The master cylinder and pressure regulator are connected to the brake calipers and filter via hydraulic lines. The pressure regulator integrates an accumulator and a solenoid valve to provide power to the brake calipers, enabling service braking and parking braking. The brake controller monitors the pressure value of the accumulator in real time and controls the start and stop of the master cylinder charging the accumulator. When the oil pressure of the accumulator rises to the upper limit pressure, the master cylinder is shut off through the solenoid valve. When the oil pressure of the accumulator drops to the lower limit pressure, the master cylinder is immediately started to charge the accumulator, providing hydraulic power to the brake calipers and enabling service braking and parking braking.

[0011] Furthermore, the drive motor 1 is a permanent magnet synchronous motor with a rated power of 16 kW and a peak power of 30 kW.

[0012] Furthermore, the gear ratio of the wheel-side reducer is 8.21.

[0013] Furthermore, the torque and speed output by the drive motor are adjusted and matched according to the real-time vehicle speed and the weight of the vehicle.

[0014] Furthermore, the drive motor and brake controller receive commands from the vehicle as a whole, working together to achieve vehicle control by the driver.

[0015] (III) Beneficial Effects

[0016] This invention proposes a distributed drive system configuration for electric vehicles, including a drive motor, wheel-side reducers, brake discs, brake calipers, a pressure regulator, a master cylinder, a brake controller, a filter, and a connecting flange. The drive motor output is coaxially arranged with the wheel-side reducers and brakes. Employing a dual-motor, dual-side independent drive configuration, the drive system operates within a reasonable operating range by rationally selecting motors with different power densities and matching wheel-side reducers. The power output components, brake discs, and brake calipers are located outside the vehicle body, while the drive motor output and water inlet / outlet ports are located inside the vehicle. This improves the environmental adaptability of the braking system and drive motor, and features a compact structure and small size. Attached Figure Description

[0017] Figure 1 This is a simplified diagram illustrating the working principle of the drive system of the present invention;

[0018] Figure 2 This is a layout diagram of the electric drive vehicle distributed drive system of the present invention from the upper right perspective;

[0019] Figure 3 This is a top-left view layout diagram of the electric drive vehicle distributed drive system of the present invention;

[0020] Figure 4 This is a top-right view of the interior layout of the electric drive vehicle distributed drive system of the present invention.

[0021] Figure 5 This is a left-side view of the interior layout of the electric drive vehicle distributed drive system of the present invention. Detailed Implementation

[0022] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0023] This embodiment proposes a distributed drive system configuration for electric vehicles. Its main function is to convert electrical energy into mechanical energy through a controller and drive motor to drive the vehicle. Under driving control, the electrical energy of the engine-generator system and the on-board energy storage device is converted into the kinetic energy of the wheels to drive the vehicle. When the vehicle brakes, the kinetic energy of the vehicle is regenerated into electrical energy and fed back to the on-board energy storage device to achieve regenerative braking of the vehicle.

[0024] The drive system of this invention adopts a dual-motor, dual-side independent drive configuration. The working principle of the drive system is as follows: Figure 1 As shown, the overall structure is as follows Figure 2 and 3 As shown, it mainly includes a drive motor 1, a wheel-side reducer 2, a brake disc 3, a brake caliper 4, a pressure regulator 5, a master cylinder 6, a brake controller 7, a filter 8, and a connecting flange 9.

[0025] Drive motor 1 is fastened to the vehicle body via a flange. Based on the requirements of the vehicle's combat weight and maximum speed, drive motor 1 is selected as a permanent magnet synchronous motor with a rated power of 16kw and a peak power of 30kw, which can meet the requirements of maximum gradeability and maximum speed.

[0026] The wheel-side reducer 2 is connected to the drive wheel via the connecting flange 9. The wheel-side reducer 2 consists of a single-stage planetary reduction mechanism with a transmission ratio of 8.21. It meshes with planetary gears through a sun gear shaft and connects to a gear ring fixed to the drive motor 1. The drive motor 1 is directly connected to the input end of the wheel-side reducer 2, achieving speed reduction and torque increase through the single-stage planetary gear reduction. Torque is transmitted from the drive motor 1 to the wheel-side reducer 2 via the sun gear shaft. The transmission ratio of the wheel-side reducer 2 remains constant, increasing the torque transmitted from the drive motor 1 to the drive wheel at a fixed ratio and correspondingly reducing the speed of the drive wheel. After converting electrical energy into mechanical energy, the drive motor 1 transmits it to the drive wheel through the wheel-side reducer 2, achieving a stable output of torque and speed from the drive motor 1 to the drive wheel. The torque and speed output by the drive motor 1 can be adjusted and matched according to the real-time vehicle speed and overall vehicle weight.

[0027] The brake disc 3 is fixed to the housing of the wheel-side reducer 2, and the brake caliper 4 is fixed to the housing of the drive motor 1 by bolts. The brake disc 3 and brake caliper 4 enable the vehicle's service braking and parking braking functions. The brake disc 3 and the wheel-side reducer 2 are arranged coaxially, and power is transmitted to the drive wheel through a single-stage planetary gear. Compared with a horizontal reducer, this design is more compact, providing more space inside the vehicle for equipment and improving space utilization.

[0028] The pressure regulator 5, master cylinder 6, brake controller 7, and filter 8 are all mounted on the vehicle body. The master cylinder 6 and pressure regulator 5 are connected to the brake calipers 4 and filter 8 via hydraulic lines. The pressure regulator 5 integrates an accumulator and various solenoid valves to provide power to the brake calipers 4, enabling service and parking brakes. The brake controller 7 monitors the accumulator pressure in real time and controls the start and stop of the master cylinder 6 charging the accumulator. When the accumulator pressure reaches the upper limit, the master cylinder 6 is shut off via a solenoid valve; when the accumulator pressure drops to the lower limit, the master cylinder 6 is immediately activated to charge the accumulator, providing hydraulic power to the brake calipers 4, enabling service and parking brakes. The drive motor 1 and brake controller 7 receive vehicle commands and work together to achieve vehicle control for the driver.

[0029] The drive system of this invention features a rational configuration and layout. The brake and drive motor are coaxially arranged, as are the drive motor and wheel-side reducer. The drive motor and wheel-side reducer can be selected based on the vehicle's combat weight, maximum sloping angle, and maximum speed, currently covering the performance requirements of 1-ton to 2-ton electric drive vehicles. Only the power output portion of the drive system is located outside the vehicle body, improving the drive motor's environmental adaptability. The drive motor, wheel-side reducer, and brake can be installed as a single unit, meeting not only the requirements for vehicle lightweighting and integration but also improving the reliability of the drive system and reducing the space occupied within the vehicle.

[0030] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A distributed drive system configuration for an electric vehicle, characterized in that: The electric vehicle distributed drive system configuration includes a drive motor, a wheel-side reducer, a brake disc, a brake caliper, a pressure regulator, a master cylinder, a brake controller, a filter and a connecting flange; wherein, The driving motor is fastened to the vehicle body through a flange; The wheel-side reducer is connected to the driving wheel through a connecting flange; the wheel-side reducer is composed of a first-stage planetary reduction mechanism, which meshes with the planetary gear through the sun gear shaft and is connected to the gear ring fixed on the drive motor; the drive motor is directly connected to the input end of the wheel-side reducer, and speed reduction and torque increase are achieved through first-stage planetary gear reduction; the torque is transmitted from the drive motor to the wheel-side reducer through the sun gear shaft, and the transmission ratio of the wheel-side reducer remains unchanged, and the torque transmitted to the driving wheel by the drive motor can be increased with a fixed transmission ratio, and the speed of the driving wheel can be reduced accordingly; the drive motor converts electrical energy into mechanical energy and transmits it to the driving wheel through the wheel-side reducer, realizing stable output of torque and speed from the drive motor to the driving wheel; The brake disc is fixed on the housing of the wheel-side reducer, and the brake caliper is fixed on the housing of the drive motor by bolts. The vehicle's service brake and parking brake functions are realized through the brake disc and brake caliper; the brake disc and the wheel-side reducer are coaxially arranged, and the power is transmitted to the driving wheel through the primary planetary gear; The pressure regulator, master cylinder, brake controller and filter are all installed on the vehicle body; among them, the master cylinder and pressure regulator are connected to the brake caliper and filter through hydraulic pipelines; the pressure regulator integrates the accumulator and solenoid valve to provide power for the brake caliper to achieve service braking and parking braking; the brake controller controls the start and stop of the master pump to fill the accumulator with fluid by monitoring the pressure value of the accumulator in real time; when the oil pressure of the accumulator rises to the upper limit pressure, the master pump is closed through the solenoid valve, and when the oil pressure of the accumulator drops to the lower limit pressure, the master pump is immediately started to fill the accumulator with fluid, providing hydraulic power for the brake caliper to achieve service braking and parking braking.

2. The electric vehicle distributed drive system configuration according to claim 1, characterized in that: The drive motor 1 is a permanent magnet synchronous motor with a rated power of 16 kW and a peak power of 30 kW.

3. The electric vehicle distributed drive system configuration according to claim 1, characterized in that: The transmission ratio of the wheel reducer is 8.

21.

4. The electric vehicle distributed drive system configuration according to claim 1, characterized in that: The torque and speed output by the drive motor are changed and matched according to the real-time vehicle speed and the weight of the vehicle.

5. The electric vehicle distributed drive system configuration according to claim 1, characterized in that: The drive motor and brake controller receive vehicle instructions and jointly implement the driver's vehicle control.

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