Intelligent hub bearing unit with automatic parking function

Abstract

The utility model discloses an intelligent hub bearing unit with an automatic parking function, which comprises a wheel shaft, a connecting block is arranged on one side of the wheel shaft, a micro motor is connected to one side of the connecting block, a microprocessor is arranged in the center of the connecting block, a sensor is arranged on one side of the microprocessor, and the sensor is connected with the micro motor. A micro camera is arranged on the side, away from the sensor, of the microprocessor, an inner ring flange is arranged on the outer wall of the wheel shaft, a magnetic ring is arranged on the outer side of the inner ring flange, steel balls are arranged on the two sides of the magnetic ring, and outer ring flanges are arranged on the outer sides of the steel balls; position data of each hub unit are collected by installing a sensor and a micro camera, so that a vehicle can better understand and respond to the surrounding environment, the rotating speed and direction of each wheel are controlled by installing an independent motor on each hub unit, and data from an ultrasonic sensor and the micro camera are collected through a microprocessor. And the operation accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the field of wheel hub units, and more specifically, to an intelligent wheel hub bearing unit with an automatic parking function. Background Art

[0002] In modern vehicle technology, the automatic parking system mainly relies on sensors, cameras and vehicle control systems. As the only part of the vehicle that contacts the ground, the integrated design of the smart wheel hub is expected to further improve the efficiency and accuracy of the automatic parking function.

[0003] After searching, the existing patent (Announcement No.: CN211764680U) discloses a car wheel hub unit with an intelligent sensor, including a wheel hub unit assembly, the wheel hub unit assembly is provided with a swing angle flange that is flange-type sleeved with the wheel hub unit assembly, the upper end of the swing angle flange is provided with an angle adjustment component that is hinged with the swing angle flange in an ear plate type, the swing angle flange is provided with a number of swing angle slots that are equally spaced and annularly distributed, the swing angle flange and the wheel hub unit assembly are provided with a number of steel balls that are movably in contact with the swing angle slots, the patent has the characteristics of good structural shock absorption performance, low noise, good sealing effect, strong operating stability and long service life, realizes the adjustability of the wheel hub angle, improves the safety of automobile braking, assists the safety and reliability of the automatic parking system, effectively captures the displacement of the car in real time, and can resist external interference. In the process of realizing the utility model, the inventor found that the prior art has the following problems:

[0004] The design of existing intelligent wheel hub units makes the automatic parking system mostly focus on the internal calculation and external sensing of the vehicle, and is highly dependent on the central control system. The autonomy and accuracy of each set of wheel hub units in the automatic parking process rely on the central control system, resulting in poor accuracy, and dynamic control cannot directly act on the wheel hub unit;

[0005] Therefore, in order to solve the above problems, an intelligent wheel hub bearing unit with automatic parking function is proposed. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides an intelligent wheel hub bearing unit with an automatic parking function to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an intelligent wheel hub bearing unit with automatic parking function, comprising a wheel axle, a connecting block is provided on one side of the wheel axle, a micro motor is connected to one side of the connecting block, a microprocessor is provided at the center of the connecting block, a sensor is provided on one side of the microprocessor, a micro camera is provided on the side of the microprocessor away from the sensor, an inner ring flange is provided on the outer wall of the wheel axle, a magnetic ring is provided on the outer side of the inner ring flange, steel balls are provided on both sides of the magnetic ring, and an outer ring flange is provided on the outer side of the steel ball.

[0008] Preferably, a communication interface is provided on one side of the connection block, and the connection block can be connected to a vehicle control system through the communication interface.

[0009] Preferably, bolts are provided on one side of the wheel axle, and the wheel axle can be connected to the tire via the bolts.

[0010] Preferably, the steel balls are provided in four groups, the four groups of steel balls are symmetrically arranged on both sides of the inner ring flange, and the outer walls of the steel balls are provided with retaining frames.

[0011] Preferably, the outer wall of the outer ring flange is provided with double grooves, the double groove quenching layer depth is 1.5-3.2, the surface hardness is HRC59-64, the rest hardness is HB180-230, and the non-machined surface is shot peened.

[0012] Preferably, the inner ring flange is in a circular ring shape, and a channel is arranged on the outer side of the inner ring flange, and the channel corresponds to the position of the double channel of the outer ring flange.

[0013] Technical effects and advantages of the utility model:

[0014] 1. Compared with the existing technology, this intelligent wheel hub bearing unit with automatic parking function collects the position data of each wheel hub unit by installing sensors and micro cameras. The combination of cameras and ultrasonic sensors provides all-round environmental perception capabilities from macro to micro. The camera is responsible for collecting visual information in a wide environment, while the ultrasonic sensor focuses on detailed detection in the narrow space near the wheel, enabling the vehicle to better understand and respond to the surrounding environment.

[0015] 2. Compared with the existing technology, this intelligent wheel hub bearing unit with automatic parking function controls the speed and direction of each wheel by installing an independent motor on the wheel hub unit, collects data from the ultrasonic sensor and the micro camera through the microprocessor, and processes the data to control the operation of the motor. Due to the localization of control, the feedback loop of each wheel hub is shorter, and faster adjustment and response can be achieved directly on the wheel hub, reducing the complex transmission chain from sensor to actuator and improving the accuracy of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 This is a front view structural schematic diagram of the utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the micro motor and the connecting block of the utility model.

[0019] Figure 4 This is a schematic diagram of the outer ring flange structure of the utility model.

[0020] Figure 5 This is a schematic diagram of the inner ring flange structure of the utility model

[0021] The accompanying drawings are marked as follows: 1. axle; 2. connecting block; 3. micro motor; 4. microprocessor; 5. sensor; 6. micro camera; 7. inner ring flange; 8. magnetic ring; 9. steel ball; 10. outer ring flange; 11. communication interface; 12. bolt; 13. retaining frame. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1

[0024] As attached Figures 1 to 5The smart wheel hub bearing unit with automatic parking function shown in the figure includes a wheel axle 1. The wheel axle 1 is a design that integrates the bearing, wheel axle and flange. This design not only improves the assembly efficiency, but also helps to reduce potential conflicts between components and improve the overall reliability of the system. A connecting block 2 is arranged on one side of the wheel axle 1. The connecting block 2 is usually made of aluminum alloy material to balance the requirements of lightweight and structural strength. The surface is coated with a corrosion-resistant layer. The connecting block 2 is connected to the wheel axle 1 by bolts. A high-performance sealing ring is arranged on the connecting surface, which can maintain elasticity and sealing in a wide temperature range to prevent the internal wheel axle 1 and the sensor 5 from being damp or damaged. The connection block 2 has a micro motor 3 connected to one side. The micro motor 3 can use a brushless DC motor (BLDC), which has the characteristics of high efficiency, high torque and fast response. Integrating the motor into the wheel hub can significantly improve the space utilization and transmission efficiency of the vehicle. Due to the reduction of traditional mechanical transmission components, not only the weight of the vehicle is reduced, but also the braking energy can be effectively recovered, thereby improving the energy efficiency of the whole vehicle. A microprocessor 4 is arranged at the center of the connection block 2. The microprocessor 4 model is STM32. The selected microprocessor 4 must be able to work stably within a wide temperature range and have certain anti-vibration, dustproof and waterproof capabilities. The microprocessor A sensor 5 is arranged on one side of the wheel hub unit 4. The performance of the sensor 5 shall comply with the requirements of GB / T13594. At the same time, the installation shall comply with the requirements of general technology. The sensor 5 must meet the air tightness test requirements: when an air pressure of 196KPa is applied to the inner cavity, there shall be no leakage at the connection parts of the sensor 5. The sensor 5 may be an ultrasonic sensor. A micro camera 6 is arranged on the side of the microprocessor 4 away from the sensor 5. The model of the micro camera 6 is Sony IMX307. The performance of the micro camera 6 of the above model can be similar. The micro camera 6 and the sensor 5 integrated on the wheel hub unit can provide 360-degree real-time images and distance data. According to the data, these data are crucial for the autonomous driving system. The micro camera 6 can capture visual information of the surrounding environment, while the sensor 5 can detect obstacles at close range. The combination of the two can provide accurate environmental perception data for the autonomous driving system. The outer wall of the wheel axle 1 is provided with an inner ring flange 7, which is tightly connected to the automobile wheel axle 1 through bolts or nuts to ensure that the hub unit can be stably installed on the vehicle. This connection method provides reliable mechanical fixation to prevent the hub unit from being displaced during driving. The outer side of the inner ring flange 7 is provided with a magnetic ring 8, and the center diameter of the induction magnetic ring of the magnetic ring 8 is 62.25. The design of the magnetic ring 8 needs to take into account the working characteristics of the sensor 5. By adjusting the magnetic field strength and distribution of the magnetic ring 8, the output signal of the sensor 5 can be optimized. Steel balls 9 are arranged on both sides of the magnetic ring 8. The design of the steel balls 9 significantly reduces the movement resistance in the wheel hub unit. In a high-speed rotating environment, the traditional sliding friction will be replaced by rolling friction, which greatly reduces energy loss and improves the overall mechanical efficiency. An outer ring flange 10 is arranged on the outside of the steel ball 9. The outer ring flange 10 is usually used to fix various components of the braking system, such as brake discs or brake drums. It ensures that the braking system can be closely integrated with the wheel hub unit, so that it can respond quickly when the driver steps on the brake, effectively slowing down or stopping the vehicle. .

[0025] Example 2

[0026] Based on Example 1, the solution in Example 1 is further detailed in combination with the following specific working method. Figures 1 to 5 As shown, see the following description for details:

[0027] As a preferred embodiment, a communication interface 11 is provided on one side of the connection block 2, and the connection block 2 can be connected to the vehicle control system through the communication interface 11. Furthermore, the model of the communication interface 11 is a CAN (Controller Area Network) bus interface, which can exchange information with the vehicle control system at high speed.

[0028] As a preferred embodiment, a bolt 12 is provided on one side of the axle 1, and the axle 1 can be connected to the tire through the bolt 12. The manufacturing process of the bolt 12 requires precise processing technology, such as cold heading or turning, to ensure the dimensional accuracy and surface quality of the bolt 12, so as to ensure the reliability and safety of the hub unit.

[0029] As a preferred embodiment, four groups of steel balls 9 are provided, and the four groups of steel balls 9 are symmetrically arranged on both sides of the inner ring flange 7. A retaining frame 13 is provided on the outer wall of the steel balls 9. The design of the retaining frame 13 ensures that the load can be evenly distributed among all the steel balls 9. This is very important because uneven load distribution will cause excessive pressure on individual steel balls 9, thereby accelerating wear and shortening the overall life of the bearing. Furthermore, the steel balls 9 and retaining frame 13 work together in the hub unit to achieve efficient and low-friction rotation function. This cooperation not only improves the performance of the bearing, but also optimizes the efficiency of power transmission.

[0030] As a preferred embodiment, the outer wall of the outer ring flange 10 is provided with double grooves, the double groove quenching layer depth is 1.5-3.2, and the surface hardness is HRC59-64, the remaining hardness is HB180-230, and the non-machined surface is shot peened. The double groove structural design increases the overall stiffness of the outer ring flange, so that it can better withstand and resist external forces, and improve the mechanical strength of the hub unit. The double groove design enables the load to be transferred from the wheel hub to the outer ring flange through the steel balls, and then transferred from the flange to the vehicle body, effectively bearing the weight of the vehicle and the impact force during driving.

[0031] As a preferred embodiment, the inner ring flange 7 is annular, and a channel is arranged on the outer side of the inner ring flange 7, and the channel corresponds to the position of the double channel of the outer ring flange 10. The inner ring channel supports the rolling elements, bears and transmits various loads from the wheel, including radial and axial forces. This is one of the basic functions to ensure the driving stability of the vehicle.

[0032] The working process of the utility model is as follows: first, in the automatic parking mode, the main control system of the vehicle will send high-level instructions (such as parking start) to each wheel hub unit, and then each wheel hub unit will operate independently according to the instructions of the main control, and the micro camera 6 and sensor 5 set on each group of wheel hub units will start to collect external environment data and send the data to the corresponding microprocessor 4. The microprocessor 4 analyzes the data to determine the exact position and speed that each tire needs to reach, and then independently controls the micro motor 3 set in each wheel hub unit to make adjustments. Through continuous adjustment, the vehicle can accurately enter the parking space, reducing dependence on the driver throughout the process. The above is the working principle of the intelligent wheel hub bearing unit with automatic parking function.

[0033] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A smart wheel hub bearing unit with automatic parking function, comprising a wheel axle (1), characterized in that: A connecting block (2) is provided on one side of the wheel axle (1), a micro motor (3) is connected to one side of the connecting block (2), a microprocessor (4) is provided at the center of the connecting block (2), a sensor (5) is provided on one side of the microprocessor (4), a micro camera (6) is provided on the side of the microprocessor (4) away from the sensor (5), an inner ring flange (7) is provided on the outer wall of the wheel axle (1), a magnetic ring (8) is provided on the outer side of the inner ring flange (7), steel balls (9) are provided on both sides of the magnetic ring (8), and an outer ring flange (10) is provided on the outer side of the steel ball (9).

2. The intelligent wheel hub bearing unit with automatic parking function according to claim 1, characterized in that: A communication interface (11) is provided on one side of the connection block (2), and the connection block (2) can be connected to a vehicle control system via the communication interface (11).

3. The intelligent wheel hub bearing unit with automatic parking function according to claim 1, characterized in that: A bolt (12) is provided on one side of the wheel axle (1), and the wheel axle (1) can be connected to a tire via the bolt (12).

4. The intelligent wheel hub bearing unit with automatic parking function according to claim 1, characterized in that: The steel balls (9) are provided in four groups, and the four groups of the steel balls (9) are symmetrically arranged on both sides of the inner ring flange (7). The outer wall of the steel balls (9) is provided with a retaining frame (13).

5. The intelligent wheel hub bearing unit with automatic parking function according to claim 1, characterized in that: The outer wall of the outer ring flange (10) is provided with double grooves, the double groove quenching layer has a depth of 1.5-3.2, a surface hardness of HRC59-64, and the rest hardness of HB180-230, and the non-machined surface is shot peened.

6. The intelligent wheel hub bearing unit with automatic parking function according to claim 1, characterized in that: The inner ring flange (7) is in the shape of a circular ring, and a channel is arranged on the outer side of the inner ring flange (7), and the channel corresponds to the position of the double channel of the outer ring flange (10).

Images