Six-wheel distributed drive system

Abstract

Six-wheel distributed drive system, including wheel side gearbox respectively installed on six wheels, it is characterized in that: the wheel side gearbox includes axial flux motor, the input planetary gear connected with axial flux motor, the wheel hub planetary gear connected with input planetary gear and integrated in the wheel hub of wheel, the wheel hub brake for braking wheel hub and the input brake for adjusting the speed ratio of input planetary gear, the input brake is installed on the shell of wheel side gearbox and is matched with input planetary gear, axial flux motor is connected with vehicle chassis.The utility model forms the high speed and high torsion two power of wheel side gearbox, satisfies the drive demand of high speed and high torsion of vehicle, guarantees the power flexibility of each wheel, forms the distributed wheel side drive scheme, simplifies mechanical layout, reduces system inertia and energy consumption, ensures the power flexibility of each wheel on the basis of reducing cost and weight, improves vehicle power performance.

Description

Technical Field

[0001] This utility model relates to a six-wheel distributed drive system, belonging to the field of wheel-side drive technology. Background Technology

[0002] Engineering vehicles employ either bridge-type drive or wheel-side drive. Wheel-side drive fully leverages its structural advantages and the control function of the overall controller, achieving a wide range of power torque distribution without additional energy consumption. The driving torque of each drive wheel can be individually controlled and actively adjusted according to the vehicle's operating status and road conditions, forming an electronic differential. This offers potential advantages in improving the overall traction performance and operational adaptability. In commercial vehicles, wheel-side drive is more advantageous than bridge-type drive. Most six-wheeled engineering vehicles use two or four wheels as drive wheels, with wheel-side drive units mounted on them, and the other wheels as driven wheels. The inclusion of some drive wheels is primarily for cost and weight reduction, but its drawback is the inability to achieve independent drive for each wheel. The driving flexibility of the driven wheels is correspondingly limited, affecting the overall vehicle power performance. Existing wheel-side drives mostly consist of a wheel-side motor, reducer, and brake. To increase the power density at the wheel end, high-power traction motors are used, which is the main reason for the large weight and high cost of wheel-side drives. The purpose of this solution is to ensure the power flexibility of each wheel while reducing cost and weight, thereby improving vehicle power performance. Utility Model Content

[0003] The six-wheel distributed drive system provided by this utility model forms a two-speed and high-torque power system for the wheel-side gearbox, which meets the high-speed and high-torque drive requirements of the vehicle, ensures the power flexibility of each wheel, forms a distributed wheel-side drive scheme, simplifies the mechanical layout, reduces system inertia and energy consumption, and achieves the goal of ensuring the power flexibility of each wheel while reducing cost and weight, thereby improving the vehicle's power performance.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A six-wheel distributed drive system includes wheel-side gearboxes mounted on six wheels respectively. The wheel-side gearboxes include an axial flux motor, an input planetary gear set connected to the axial flux motor, a hub planetary gear set connected to the input planetary gear set and integrated into the wheel hub, a hub brake for braking the wheel hub, and an input brake for adjusting the speed ratio of the input planetary gear set. The input brake is mounted on the housing of the wheel-side gearbox and cooperates with the input planetary gear set. The axial flux motor is connected to the vehicle chassis.

[0006] Preferably, the input planetary gear set is a single-stage planetary gear set structure, including an input sun gear connected to an axial flux motor, input planet gears meshing with the input sun gear, an input planet carrier assembling the input planet gears, and an input gear ring with an inner ring meshing with the input planet gears. The input gear ring meshes with an input brake, and the input planet carrier is connected to the hub planetary gear set.

[0007] Preferably, the hub planetary gear set includes a hub sun gear connected to the input planetary carrier, hub planet gears meshing with the hub sun gear, a hub planetary carrier fixed to the hub and equipped with the hub planet gears, and a hub gear ring with an inner ring meshing with the hub planet gears, wherein the hub gear ring is fixed.

[0008] Preferably, the hub sun gear and the input planetary carrier are coaxially connected via a brake shaft, and the hub brake is mounted on the brake shaft. The hub brake is a hydraulic disc brake.

[0009] Preferably, one end of the wheel hub gear ring extends out of the wheel hub and is fixed to the housing of the wheel hub gearbox.

[0010] The beneficial effects of this utility model are:

[0011] This invention relates to a six-wheel distributed drive system. The wheel-side gearbox uses an axial flux motor as its power source. Leveraging the high power density, light weight, and low cost of the axial flux motor, the weight and cost of the wheel-side gearbox are reduced. The axial flux motor is connected to the vehicle chassis, ensuring its stability and improving transmission reliability. The power from the axial flux motor is transmitted to the wheel hubs via the input planetary gear set and the wheel hub planetary gear set. An input brake adjusts the speed ratio of the input planetary gear set, creating two power levels for the wheel-side gearbox: high speed and high torque, meeting the vehicle's high-speed and high-torque driving requirements. By equipping each of the six wheels with a wheel-side gearbox, each wheel is configured as an independently driveable wheel, ensuring the dynamic flexibility of each wheel and forming a distributed wheel-side drive scheme. This simplifies the mechanical layout, reduces system inertia and energy consumption, and achieves improved vehicle performance while reducing cost and weight while maintaining the dynamic flexibility of each wheel. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a six-wheeled distributed drive system in a specific implementation.

[0013] Figure 2 This is a schematic diagram of the transmission structure of the wheel-side gearbox. Detailed Implementation

[0014] The following is combined Figures 1-2 The embodiments of this utility model will be described in detail below.

[0015] A six-wheel distributed drive system includes wheel-side gearboxes mounted on six wheels respectively. The wheel-side gearboxes include an axial flux motor 1, an input planetary gear set 2 connected to the axial flux motor 1, a hub planetary gear set 3 connected to the input planetary gear set 2 and integrated into the wheel hub 100, a hub brake 4 for braking the wheel hub, and an input brake 5 for adjusting the speed ratio of the input planetary gear set 2. The input brake 5 is mounted on the housing 6 of the wheel-side gearbox and cooperates with the input planetary gear set 2. The axial flux motor 1 is connected to the vehicle chassis 101.

[0016] The six-wheel distributed drive system described above uses an axial flux motor as the power source for the wheel-side gearbox. Utilizing the high power density, light weight, and low cost of the axial flux motor 1, the weight and cost of the wheel-side gearbox are reduced. The axial flux motor 1 is connected to the vehicle chassis, ensuring its stability and improving transmission reliability. The power from the axial flux motor 1 is transmitted to the wheel hub 100 via the input planetary gear set 2 and the wheel hub planetary gear set 3. The input brake 5 adjusts the speed ratio of the input planetary gear set 2, creating two power levels for the wheel-side gearbox: high speed and high torque, meeting the vehicle's high-speed and high-torque driving requirements. By equipping each of the six wheels with a wheel-side gearbox, each of the six wheels is configured as an independently driveable wheel, ensuring the dynamic flexibility of each wheel and forming a distributed wheel-side drive scheme. This simplifies the mechanical layout, reduces system inertia and energy consumption, and achieves improved vehicle dynamic performance while reducing cost and weight while maintaining the dynamic flexibility of each wheel.

[0017] The input planetary gear 2 is a single-stage planetary gear structure, including an input sun gear 21 connected to the axial flux motor 1, an input planet gear 22 meshing with the input sun gear 21, an input planet carrier 23 that assembles the input planet gear 22, and an input gear ring 24 whose inner ring meshes with the input planet gear 22. The input gear ring 24 cooperates with the input brake 5, and the input planet carrier 23 is connected to the hub planetary gear 3. When the input brake 5 is disengaged, the input ring gear 24 can rotate freely. At this time, the speed ratio of the input planetary gear set 2 is equal to 1. The power of the axial flux motor 1 is transmitted to the input sun gear 21. The input sun gear 21 drives the input planetary carrier 23 to rotate synchronously, transmitting the power to the hub planetary gear set 3. The hub planetary gear set 3 drives the hub to rotate. Only the hub planetary gear set 3 decelerates the power of the axial flux motor 1, forming a high-speed drive for the hub. When the input brake 5 is closed, restricting the rotation of the input ring gear 24, the speed ratio of the input planetary gear set 2 is greater than 1. The power of the axial flux motor is transmitted to the input sun gear 21. The input sun gear 21 drives the input planetary gear 22 to move, thereby causing the input planetary carrier 23 to rotate. The input planetary carrier 23 transmits the power to the hub planetary gear set 3. The hub planetary gear set 3 drives the hub to rotate. The input planetary gear set 2 and the hub planetary gear set 3 decelerate the power of the axial flux motor in sequence, forming a high-torque drive for the hub.

[0018] The hub planetary gear set 3 includes a hub sun gear 31 connected to the input planetary carrier, hub planet gears 32 meshing with the hub sun gear 31, a hub planetary carrier 33 fixed to the hub and fitted with the hub planet gears 32, and a hub gear ring 34 whose inner ring meshes with the hub planet gears 32. The hub gear ring 34 is fixed. The hub planetary gear set 3 is a single-stage planetary gear set where power is input from the hub sun gear 31 and output from the hub planetary carrier 33. The hub planetary gear set 3 is integrated into the hub 100, effectively reducing the housing size of the wheel-side gearbox and further reducing its size and weight.

[0019] The hub sun gear 31 and the input planetary carrier 23 are coaxially connected via a brake shaft 7. The hub brake 4, a hydraulic disc brake, is mounted on the brake shaft 7. By mounting the hub brake 4 between the hub sun gear 31 and the input planetary carrier 23, the axial space between the input planetary gear set 2 and the hub planetary gear set 3 is fully utilized, reducing the size of the wheel-side gearbox. The hydraulic disc brake provides powerful braking performance, ensuring reliable braking.

[0020] One end of the wheel hub gear ring 34 extends out of the wheel hub 100 and is fixed to the housing 6 of the wheel hub gearbox. The wheel hub gear ring 34 is enclosed within the wheel hub 100, and the wheel hub gear ring 34 extends out of the wheel hub and is fixed to the housing 6. This ensures that the wheel hub gear ring 34 is effectively fixed without increasing the inner diameter of the wheel hub, thereby further improving the compactness of the structure.

[0021] The technical solutions of the embodiments of this utility model have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A six-wheel distributed drive system, comprising wheel-side gearboxes mounted on six wheels respectively, characterized in that: The wheel-side gearbox includes an axial flux motor, an input planetary gear set connected to the axial flux motor, a hub planetary gear set connected to the input planetary gear set and integrated into the wheel hub, a hub brake for braking the wheel hub, and an input brake for adjusting the speed ratio of the input planetary gear set. The input brake is mounted on the housing of the wheel-side gearbox and cooperates with the input planetary gear set. The axial flux motor is connected to the vehicle chassis.

2. The six-wheel distributed drive system according to claim 1, characterized in that: The input planetary gear set is a single-stage planetary gear set structure, including an input sun gear connected to an axial flux motor, input planet gears meshing with the input sun gear, an input planet carrier assembling the input planet gears, and an input gear ring with an inner ring meshing with the input planet gears. The input gear ring cooperates with the input brake, and the input planet carrier is connected to the hub planetary gear set.

3. The six-wheel distributed drive system according to claim 2, characterized in that: The aforementioned hub planetary gear set includes a hub sun gear connected to an input planetary carrier, hub planet gears meshing with the hub sun gear, a hub planetary carrier fixed to the hub and equipped with the hub planet gears, and a hub gear ring with an inner ring meshing with the hub planet gears. The hub gear ring is fixed.

4. The six-wheel distributed drive system according to claim 3, characterized in that: The hub sun gear and the input planetary carrier are coaxially connected via a brake shaft. The hub brake is mounted on the brake shaft and is a hydraulic disc brake.

5. The six-wheel distributed drive system according to claim 4, characterized in that: One end of the wheel hub gear ring extends out of the wheel hub and is fixed to the housing of the wheel hub gearbox.

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