Vehicle four-wheel positioning device

Abstract

The utility model relates to the related technical field of vehicle four-wheel positioning, and discloses a vehicle four-wheel positioning device which comprises one or more detectors, each detector comprises an instrument shell, a circuit board is arranged in each instrument shell, and the circuit board is connected with the instrument shell. The circuit board is provided with an MCU micro-control unit, a micro-electro-mechanical triaxial accelerometer, a triaxial micro-electro-mechanical gyro sensor and a wireless transmission module, and the micro-electro-mechanical triaxial accelerometer, the triaxial micro-electro-mechanical gyro sensor and the wireless transmission module are all connected with the MCU micro-control unit; according to the utility model, a handheld small instrument is combined with a micro-electro-mechanical three-axis accelerometer and a three-axis micro-electro-mechanical gyro sensor to calculate all angles of wheels of a vehicle, wherein the angles comprise a kingpin caster angle, a kingpin inclination angle, a front wheel camber angle and a front wheel toe-in angle. A user can carry out four-wheel positioning in a garage of himself or herself or rapidly inspect a parking lot, and due to the fact that a fixed place and large-scale measuring equipment are not needed, large-scale wheels can also be rapidly subjected to four-wheel positioning measurement outdoors.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle four wheel positioning related technical field especially, a kind of vehicle four wheel positioning device. BACKGROUND

[0002] Four-wheel alignment is one of the important measures to ensure driving safety. If the wheel alignment is incorrect, it can cause unstable driving of the vehicle and increase the risk of traffic accidents. Regular four-wheel alignment can timely find and correct the wheel alignment problem, ensuring the safe driving of the vehicle.

[0003] In summary, four-wheel alignment is crucial for vehicles. It not only improves the handling and driving stability of the vehicle, but also prolongs the service life of the tires, improves fuel economy, and ensures driving safety. Therefore, vehicle owners should regularly check and maintain four-wheel alignment to ensure the vehicle is in the best condition. There are various types of four-wheel alignment instruments, each with its own working principle and application scenario, such as 3D image alignment instrument, CCD alignment instrument, laser alignment instrument, toe gauge, and optical level alignment instrument. However, there are defects such as high use cost and complex operation, so an easy-to-operate and low-cost four-wheel alignment device system is particularly important. SUMMARY

[0004] The main purpose of the utility model is to provide a vehicle four-wheel positioning device to solve the technical problems of traditional 3D image alignment instrument, CCD alignment instrument, laser alignment instrument, toe gauge, and optical level alignment instrument, but there are high use cost and complex operation.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a vehicle four-wheel positioning device, which comprises one or more detectors, the detector comprises a meter shell, the meter shell is provided with a circuit board, the circuit board is provided with an MCU micro-control unit, a micro-electromechanical three-axis accelerometer, a three-axis micro-electromechanical gyroscope sensor and a wireless transmission module, and the micro-electromechanical three-axis accelerometer, three-axis micro-electromechanical gyroscope sensor and wireless transmission module are connected with the MCU micro-control unit.

[0007] The MCU micro-control unit obtains the kingpin caster angle, kingpin inclination, front wheel camber angle and front wheel toe angle of the vehicle wheel according to the angle data measured by the micro-electromechanical three-axis accelerometer and three-axis micro-electromechanical gyroscope sensor. The MCU micro-control unit is connected with the mobile monitoring end through the wireless transmission module, and the mobile monitoring end receives the detection data of the kingpin caster angle, kingpin inclination, front wheel camber angle and front wheel toe angle of the detected vehicle wheel through the wireless transmission module.

[0008] One end of the instrument shell is provided with a magnetic base, and the instrument shell is attached to the brake disc through the magnetic base.

[0009] As a preferred technical scheme of the utility model, the instrument shell is provided with a display screen connected with an MCU micro control unit, and the instrument shell is further provided with a power-on button, a clear button, an adjustment menu button and a selection button connected with a circuit board.

[0010] As a preferred technical scheme of the utility model, the inside of the instrument shell is further provided with a power supply module for supplying power to each device of the circuit board, and the end of the instrument shell is further provided with a charging interface for charging the power supply module.

[0011] As a preferred technical scheme of the utility model, the magnetic base comprises a docking seat body, and the end of the docking seat body is provided with an electromagnet, the electromagnet is connected with the power supply module, and the instrument shell is further provided with a power-off control button for controlling the power-off of the electromagnet.

[0012] As a preferred technical scheme of the utility model, the instrument shell comprises a bottom shell with a semicircular cross section, the flat surface of the bottom shell is provided with a cover plate, an installation cavity is formed between the bottom shell and the cover plate, the circuit board is installed in the installation cavity, and the cover plate is provided with a through hole corresponding to the display screen.

[0013] As a preferred technical scheme of the utility model, the magnetic base is provided with a rubber protective layer on the side in contact with the brake disc.

[0014] As a preferred technical scheme of the utility model, the bottom shell and the cover plate are made of an electromagnetic shielding material.

[0015] The utility model has the advantages of:

[0016] 1. The vehicle four-wheel positioning device is provided with one or more detection instruments, when the wheels are positioned, the detection instruments are fixed to the brake disc of the wheel through the magnetic base, then steering operation is carried out, the micro-electromechanical three-axis accelerometer and three-axis micro-electromechanical gyro sensor detect the inclination angle in the steering process, then the MCU micro control unit obtains the kingpin caster angle, kingpin inclination angle, front wheel camber angle and front wheel toe angle of the wheel according to the angle data measured by the micro-electromechanical three-axis accelerometer and three-axis micro-electromechanical gyro sensor, so that four-wheel positioning is realized, and rapid and simple wheel positioning measurement can be realized; the detection data can be transmitted to a mobile monitoring end, so that the detection data can be conveniently viewed, one end of the instrument shell is provided with a magnetic base, the instrument shell is attached to the brake disc through the magnetic base, and the use difficulty is reduced without the need of installing a clamp for fixing.

[0017] 2. The vehicle four-wheel positioning device is different from traditional method of calculating by camera machine vision or using digital level for laser alignment, the utility model has no use limit of site and cost is also greatly reduced. The utility model uses handheld small instrument to combine micro electro mechanical three-axis accelerometer and three-axis micro electro mechanical gyro sensor to calculate each angle of vehicle wheel, including kingpin caster angle, kingpin camber angle, front wheel camber angle and front wheel toe-in. User can perform four-wheel positioning in own garage or quickly check parking lot, since no fixed site and large measuring equipment are needed, large wheel can also be quickly positioned and measured outdoors. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0019] Figure 1 is a structural schematic view of a vehicle four-wheel positioning device of the present application;

[0020] Figure 2 is a structural schematic view of a cover plate of a vehicle four-wheel positioning device of the present application;

[0021] Figure 3 is a structural schematic view of a charging interface of a vehicle four-wheel positioning device of the present application;

[0022] Figure 4 is a structural schematic view of a magnetic base of a vehicle four-wheel positioning device of the present application;

[0023] Figure 5 is an installation schematic view of a circuit board of a vehicle four-wheel positioning device of the present application

[0024] Figure 6 is a kingpin caster angle measurement schematic view of a vehicle four-wheel positioning device of the present application;

[0025] Figure 7 is a rear wheel reference angle measurement schematic view of a vehicle four-wheel positioning device of the present application;

[0026] Figure 8 is a toe-in angle measurement schematic view of a vehicle four-wheel positioning device of the present application;

[0027] Figure 9 is a camber angle measurement schematic view of a vehicle four-wheel positioning device of the present application.

[0028] In the diagram: 1. Instrument housing; 101. Bottom shell; 102. Cover plate; 2. Circuit board; 3. MCU microcontroller unit; 4. Microelectromechanical triaxial accelerometer; 5. Triaxial microelectromechanical gyroscope sensor; 6. Wireless transmission module; 7. Magnetic base; 701. Docking base body; 702. Electromagnet; 703. Power off control button; 8. Display screen; 9. Power on button; 10. Zeroing button; 11. Adjustment menu button; 12. Selection button; 13. Power supply module; 14. Charging interface.

[0029] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Example

[0032] like Figures 1 to 9 As shown, a vehicle four-wheel alignment device of this utility model includes one or more detectors. The detector includes an instrument housing 1, and a circuit board 2 is provided inside the instrument housing 1. The circuit board 2 is provided with an MCU microcontroller unit 3, a microelectromechanical triaxial accelerometer 4, a triaxial microelectromechanical gyroscope sensor 5, and a wireless transmission module 6. The microelectromechanical triaxial accelerometer 4, the triaxial microelectromechanical gyroscope sensor 5, and the wireless transmission module 6 are all connected to the MCU microcontroller unit 3.

[0033] The MCU microcontroller unit 3 obtains the kingpin inclination angle, kingpin camber angle, front wheel camber angle, and front wheel toe angle of the wheel based on the angle data measured by the microelectromechanical triaxial accelerometer 4 and the triaxial microelectromechanical gyroscope sensor 5. The MCU microcontroller unit 3 is connected to the mobile monitoring terminal via the wireless transmission module 6. The mobile monitoring terminal receives the detected data of the kingpin inclination angle, kingpin camber angle, front wheel camber angle, and front wheel toe angle of the wheel through the wireless transmission module 6.

[0034] One end of the instrument shell 1 is provided with a magnetic seat 7, and the instrument shell 1 is attached to the brake disc through the magnetic seat 7. One or more detection instruments are arranged, and when the wheels are positioned, the detection instruments are fixed to the brake disc of the wheel through the magnetic seat 7, then steering operation is performed, and the micro-electromechanical three-axis accelerometer 4 and the three-axis micro-electromechanical gyro sensor 5 detect the inclination angle during steering. Then, the MCU micro control unit 3 obtains the kingpin caster angle, the kingpin inclination angle, the front wheel camber angle and the front wheel toe angle of the wheel according to the angle data measured by the micro-electromechanical three-axis accelerometer 4 and the three-axis micro-electromechanical gyro sensor 5, so that four-wheel positioning is realized, and rapid and simple wheel positioning measurement can be realized. The detection data can be transmitted to a mobile monitoring end, so that the detection data can be conveniently viewed, and one end of the instrument shell 1 is provided with a magnetic seat 7, and the instrument shell 1 is attached to the brake disc through the magnetic seat 7. Therefore, the clamps for fixing are not needed, and the difficulty of use is reduced.

[0035] Unlike the traditional method of laser alignment by camera machine vision calculation or using a digital level, the utility model has no use limit of site and the cost is greatly reduced. The utility model uses a handheld small instrument combined with a micro-electromechanical three-axis accelerometer and a three-axis micro-electromechanical gyro sensor to calculate the angles of the wheels of a vehicle, including the kingpin caster angle, the kingpin inclination angle, the front wheel camber angle and the front wheel toe angle. The user can perform four-wheel positioning in his garage or quickly check a parking lot. Since a fixed site and large measurement equipment are not needed, large wheels can also be quickly positioned and measured outdoors.

[0036] The instrument shell 1 is provided with a display screen 8 connected with the MCU micro control unit 3, and the instrument shell 1 is also provided with a power-on button 9, a zero reset button 10, an adjustment menu button 11 and a selection button 12 connected with the circuit board 2. Thus, various operations are facilitated.

[0037] The instrument shell 1 is also provided with a power supply module 13 for supplying power to various devices of the circuit board 2, and the end of the instrument shell 1 is also provided with a charging interface 14 for charging the power supply module 13, so that the charging is facilitated for subsequent use.

[0038] The magnetic seat 7 comprises a docking seat body 701, and the end of the docking seat body 701 is provided with an electromagnet 702 connected with the power supply module 13, and the instrument shell 1 is also provided with a power-off control button 703 for controlling the power-off of the electromagnet 702. Thus, the electromagnet 702 is controlled to facilitate the disassembly and assembly of the steel brake disc.

[0039] The instrument housing 1 includes a bottom shell 101 with a semicircular cross section, a flat surface of the bottom shell 101 is provided with a cover plate 102, and an installation cavity is formed between the bottom shell 101 and the cover plate 102, and the circuit board 2 is installed in the installation cavity, and the cover plate is provided with an opening corresponding to the display screen. The magnetic seat 7 is provided with a rubber protective layer on the side in contact with the brake disc, and the bottom shell 101 and the cover plate 102 are made of electromagnetic shielding material, so that the whole has good electromagnetic shielding effect.

[0040] Where the kingpin inclination is not directly obtained by measuring tools, but is indirectly measured by using the geometric relationship when the steering wheel rotates around the kingpin. As shown in Figure 6 The specific steps for measuring the kingpin caster angle are as follows:

[0041] I. Measurement steps

[0042] Place the instrument on the brake disc, and the magnet seat of the instrument can be easily stuck to the brake disc. Connect the wireless transmission module with the mobile monitoring end

[0043] Front wheel rotation angle: according to the prompt of the mobile monitoring end, rotate the steering wheel to make the measured front wheel turn inward by about 20°, for the left front wheel, turn left, and for the right front wheel, turn right, and keep the measured wheel in this position.

[0044] Reverse rotation angle: according to the prompt of the mobile monitoring end, rotate the steering wheel to make the measured wheel turn by about 40°, that is, in the opposite direction of the previous step, the total rotation angle is about 60°, but the change from 20° to -20° is focused on, that is, about 40° of relative rotation angle, and fixed in this position.

[0045] Read data: the instrument records the change of three-axis horizontal angle by using the micro-electro-mechanical three-axis accelerometer, and records the angle of wheel rotation by using the three-axis micro-electro-mechanical gyroscope sensor.

[0046] Calculate the kingpin caster angle: based on the indirect measurement method of geometric relationship, by measuring the wheel steering angle, generalized camber angle and kingpin caster angle, etc., the kingpin caster angle is calculated by using the geometric relationship between them.

[0047] Measurement principle:

[0048] By using the rotation angle measurement of the three-axis micro-electro-mechanical gyroscope sensor and the horizontal angle measurement of the micro-electro-mechanical three-axis accelerometer, the kingpin caster angle is measured by using the symmetrical relative measurement method. That is, the wheel rotates the same angle to the left and to the right around the kingpin, the change of the generalized inclination angle is measured and recorded, and then the kingpin caster angle is calculated by using these data and the wheel steering angle.

[0049] Under asymmetric conditions, according to the geometric relationship between the kingpin and the wheel, the wheel steering angle, the generalized camber angle, and the function formula of the kingpin caster angle and the kingpin inclination angle are deduced.

[0050] By measuring the generalized camber angle of the wheel at different steering angles and substituting these data into the above function formula, the kingpin inclination angle and the kingpin caster angle can be indirectly measured.

[0051] Measurement of toe angle:

[0052] Figure Figure 7 Place the instrument on the brake disc, and the magnet seat of the instrument is easily stuck to the brake disc; capture the three-axis micro-electromechanical gyroscope sensor rotation speed and set it to zero reference angle; move the instrument to the front wheel of the vehicle; capture the three-axis micro-electromechanical gyroscope sensor rotation angle, and the three-axis micro-electromechanical gyroscope sensor angle will be calculated as the toe angle. Two instruments can be used simultaneously, or one instrument can be used to measure the left and right wheels separately.

[0053] Measurement of camber angle:

[0054] As Figure 9 shown, the camber angle can be measured using an electromechanical three-axis accelerometer to measure the horizontal angle; place the instrument on the brake disc, and the magnet seat of the instrument is easily stuck to the brake disc; read the electromechanical three-axis accelerometer to calculate the horizontal angle and obtain the camber angle.

[0055] Kingpin caster angle: This is the angle formed by the shock absorber and the vertical line passing through the center of the wheel. This angle plays an important role in the return of the steering wheel at the end of a turn. The larger the angle, the higher the stability of the vehicle during driving, but the steering wheel will become more difficult to turn.

[0056] Kingpin inclination angle: This is the angle formed by the suspension and the vertical line to the ground. This angle is pre-set in most original models and mainly serves to help the steering wheel return. At low speed, the inclination angle takes on the task of steering wheel return.

[0057] Front wheel camber angle: The angle formed by the center line of the wheel and the vertical line to the ground. Positive camber is used for off-road vehicles or large trucks to increase the contact area of the tire with the ground; negative camber is often used in racing cars to increase friction during cornering and prevent skidding.

[0058] Front wheel toe: The toe of the wheel is inward, that is, "inward eight-toe". This angle can offset the adverse effects caused by the camber of the wheel.

[0059] Wheel alignment is crucial for a vehicle, as it affects the vehicle's handling, driving stability, safety, and other aspects. The importance of four-wheel alignment is as follows:

[0060] Improve handling:

[0061] Four-wheel alignment ensures that a vehicle's steering system, suspension system, and wheels are kept in the correct position and angle. This helps the driver better control the vehicle, especially in situations such as turning, accelerating, and braking. Proper four-wheel alignment can improve the vehicle's responsiveness and handling stability, making driving easier and more comfortable.

[0062] Maintaining driving stability:

[0063] Four-wheel alignment ensures that all four wheels of a vehicle are perpendicular to the ground and maintain the correct driving trajectory. This helps reduce vehicle deviation and shaking, improving driving stability. Especially at high speeds, proper four-wheel alignment can ensure that the vehicle travels stably on the road, avoiding dangerous situations.

[0064] Extending the life of tires:

[0065] Four-wheel alignment ensures even wear of the wheels, extending the life of the tires. If the wheels are not properly aligned, it will cause uneven tire wear, even causing uneven wear, biting, and other phenomena. This not only accelerates the wear of the tires, but also affects the handling and driving stability of the vehicle. Therefore, regular four-wheel alignment can protect the tires and extend their service life.

[0066] Improving fuel economy:

[0067] Four-wheel alignment ensures that the suspension system and steering system of the vehicle are in the best state, reducing unnecessary energy loss. This helps improve the fuel economy of the vehicle and reduce fuel consumption. Proper four-wheel alignment can make the vehicle travel more efficiently and reduce energy waste.

[0068] Ensuring road safety:

[0069] Four-wheel alignment is one of the important measures to ensure road safety. If the wheels are not properly aligned, it will cause the vehicle to travel unstably, increasing the risk of traffic accidents. Regular four-wheel alignment can detect and correct wheel alignment problems in a timely manner, ensuring safe driving of the vehicle.

[0070] In summary, four-wheel alignment is crucial for vehicles. It not only improves the handling and driving stability of the vehicle, but also extends the life of the tires, improves fuel economy, and ensures road safety. Therefore, vehicle owners should regularly check and maintain four-wheel alignment to ensure that the vehicle is in the best condition.

[0071] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application and the contents of the present application specification and drawings are included in the patent protection scope of the present application.

[0072] In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel solutions are included, for example, "A and / or B" includes A solution, or B solution, or A and B solution. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary technical personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of such technical solutions does not exist, nor is it within the protection scope required by the present application.

Claims

1. A vehicle four-wheel alignment device, characterized in that, The device includes one or more detectors, each of which includes an instrument housing (1), a circuit board (2) inside the instrument housing (1), an MCU microcontroller (3), a microelectromechanical triaxial accelerometer (4), a triaxial microelectromechanical gyroscope sensor (5) and a wireless transmission module (6) on the circuit board (2), and the microelectromechanical triaxial accelerometer (4), the triaxial microelectromechanical gyroscope sensor (5) and the wireless transmission module (6) are all connected to the MCU microcontroller (3); The MCU microcontroller (3) obtains the kingpin inclination angle, kingpin camber angle, front wheel camber angle and front wheel toe angle of the wheel based on the angle data measured by the microelectromechanical triaxial accelerometer (4) and the triaxial microelectromechanical gyroscope sensor (5); the MCU microcontroller (3) is connected to the mobile monitoring terminal through the wireless transmission module (6), and the mobile monitoring terminal receives the detected data of the kingpin inclination angle, kingpin camber angle, front wheel camber angle and front wheel toe angle of the wheel through the wireless transmission module (6); A magnetic base (7) is provided at one end of the instrument housing (1), and the instrument housing (1) is attached to the brake disc via the magnetic base (7).

2. The vehicle four-wheel alignment device according to claim 1, characterized in that, The instrument housing (1) is provided with a display screen (8) connected to the MCU microcontroller unit (3), and the instrument housing (1) is also provided with a power button (9), a zeroing button (10), an adjustment menu button (11), and a selection button (12) connected to the circuit board (2).

3. A vehicle four-wheel alignment device according to claim 1, characterized in that, The instrument housing (1) is also provided with a power supply module (13) for supplying power to each device on the circuit board (2); and the end of the instrument housing (1) is also provided with a charging interface (14) for charging the power supply module (13).

4. A vehicle four-wheel alignment device according to claim 1, characterized in that, The magnetic base (7) includes a docking body (701), and an electromagnet (702) is provided at the end of the docking body (701). The electromagnet (702) is connected to the power supply module (13), and a power-off control button (703) for power-off control of the electromagnet (702) is also provided on the instrument housing (1).

5. A vehicle four-wheel alignment device according to claim 1, characterized in that, The instrument housing (1) includes a bottom shell (101) with a semi-circular cross-section. A cover plate (102) is installed on the flat surface of the bottom shell (101), and an installation cavity is formed between the bottom shell (101) and the cover plate (102). The circuit board (2) is installed in the installation cavity, and the cover plate (102) is provided with an opening corresponding to the display screen.

6. A vehicle four-wheel alignment device according to claim 1, characterized in that, The magnetic base (7) has a rubber protective layer on the side that contacts the brake disc.

7. A vehicle four-wheel alignment device according to claim 5, characterized in that, The bottom shell (101) and the cover plate (102) are made of electromagnetic shielding material.

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