Automobile centering device and driving assistance system
By using V-shaped wheel units in the automotive centering device, the problem that traditional devices cannot adapt to different tire outer diameters is solved, and higher positioning accuracy and ADAS calibration accuracy are achieved.
Patent Information
- Application Number
- CN202421527313.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-01
AI Technical Summary
The traditional car centering device cannot adapt to different tire outer diameters, resulting in excessive deviation of the vehicle's X-direction stop position and failure of calibration.
A car centering device is designed, using a V-shaped roller unit to replace the traditional front axle roller boss structure, and a V-shaped roller arrangement structure is formed through two rows of inclined roller groups to adapt to the positioning of tires of different models.
It improves the positioning accuracy during vehicle alignment, enhances the accuracy of ADAS calibration, and ensures the stability and reliability of advanced driving assistance systems.
Smart Images
Figure CN222719179U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of automobile manufacturing technology, and in particular to an automobile centering device and a driving assistance system. Background Art
[0002] During the off-line testing of the advanced driver assistance system (ADAS) of an automobile, the longitudinal centerline of the vehicle is required to coincide with the longitudinal centerline of the ADAS target, so a vehicle centering device is needed to complete the automatic alignment of the vehicle.
[0003] When the inspected vehicle drives to the centering device, the cylinder connecting rod mechanism pushes the expansion frame from the inside to the outside, and the expansion frames on both sides expand outward through the synchronization mechanism. When the left and right wheels of the inspected vehicle are respectively in close contact with the expansion frames, the wheels continue to move with the expansion frames, and finally stop after the longitudinal center line of the vehicle is completely overlapped with the center line of the centering device. The vehicle is then aligned.
[0004] The front axle rollers of the conventional automobile centering device are arranged horizontally, that is, the two tires of the front axle of the automobile are limited to a certain range by the front and rear bosses on the rollers, thereby realizing the positioning of the vehicle in the X direction (driving direction).
[0005] However, due to the variety of vehicles being inspected and the different tire specifications of different types of vehicles, the boss spacing of the front axle roller of the centering device is a fixed value set in advance and cannot be automatically adjusted according to the tire size. Therefore, during the vehicle centering process, small-sized tires cannot be properly stuck in the middle of the boss, causing the vehicle's X-axis stop position deviation to be too large, resulting in calibration failure. In view of this situation, it is a technical problem that technicians in this field need to urgently solve to provide a centering device that can adapt to different tire outer diameters and accurately position the vehicle in the X direction. Utility Model Content
[0006] The purpose of this application is to provide a vehicle centering device and a driving assistance system that can solve the technical problems raised in the above-mentioned background technology.
[0007] In order to achieve the above-mentioned object, in a first aspect, the utility model provides a vehicle centering device, comprising a front axle centering mechanism and a front axle roller unit, wherein the front axle roller unit comprises a V-shaped roller unit, and the V-shaped roller unit is installed on both sides of the front axle centering mechanism, and is used to position the wheels on the left and right sides of the front axle of the vehicle respectively;
[0008] The V-shaped roller unit on each side includes two rows of roller groups inclined toward each other, forming a V-shaped roller arrangement structure of the front axle roller unit.
[0009] In an optional embodiment, the centers of the two rows of roller groups inclined toward each other are mirror-symmetrical.
[0010] In an optional embodiment, each row of the roller groups includes a plurality of rollers arranged in parallel, and each of the rollers is rotatably mounted on a roller support via a bearing.
[0011] In an optional embodiment, a support shaft for supporting the roller is mounted on the roller bracket, the support shaft passes through the entire axial length of the roller, and is mounted on the roller bracket through the bearings at both ends of the support shaft.
[0012] In an optional embodiment, vehicle arrival detection switches are provided on both sides of the front axle roller unit, and the vehicle arrival detection switches are used to detect whether the wheels on the left and right sides enter the V-shaped roller unit.
[0013] In an optional embodiment, a rear axle centering mechanism is further included, and rear axle roller units are arranged on both sides of the rear axle centering mechanism. In the length direction of the vehicle centering device, the center line of the rear axle centering mechanism coincides with the center line of the front axle centering mechanism.
[0014] In an optional embodiment, the front axle centering mechanism connects the expansion frames on both sides of the front axle through a synchronization mechanism, and adjusts the connecting rod length of the synchronization mechanism to make the positions of the expansion frames on both sides of the front axle consistent with the center line distance of the front axle centering mechanism.
[0015] In an optional embodiment, the rear axle centering mechanism connects the expansion frames on both sides of the rear axle through a synchronization mechanism, and adjusts the connecting rod length of the synchronization mechanism to make the positions of the expansion frames on both sides of the rear axle consistent with the center line distance of the rear axle centering mechanism.
[0016] In an optional embodiment, an intermediate transition frame is provided between the front axle centering mechanism and the rear axle centering mechanism, and the length of the intermediate transition frame can be adjusted according to the wheelbase of different vehicles.
[0017] In the second aspect, the utility model provides a driving assistance system, including a target gantry, an electrical control cabinet and a vehicle centering device as described in any of the aforementioned embodiments. The vehicle under test is parked on the vehicle centering device before calibration, and the vehicle is straightened by the front and rear axle expansion rods of the vehicle centering device, and then the vehicle camera or radar system is calibrated at the factory.
[0018] By configuring the front axle roller unit in the form of a V-shaped roller unit and installing the V-shaped roller unit on both sides of the front axle centering mechanism, it can be used to position the wheels on the left and right sides of the front axle of the vehicle.
[0019] The V-shaped roller unit on each side includes two rows of roller groups inclined toward each other, forming a V-shaped roller arrangement structure of the front axle roller unit.
[0020] Compared with the prior art, the utility model has the following advantages: the roller groups on both sides of the front axle of the centering device are designed in a V-shape, which can adapt to the centering of vehicles with different types of tires. Compared with the boss-type structure of the front axle roller, the V-shaped roller can allow the vehicle tire to automatically fall into the middle of the V-shaped roller, significantly improving the positioning accuracy, while also improving the accuracy of ADAS calibration, making the advanced driving assistance system more stable and reliable, and further reducing the risk during vehicle driving.
[0021] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 This is a schematic diagram of the structure of the vehicle centering device in this application;
[0024] Figure 2 It is a schematic diagram of the structure of the V-type roller unit;
[0025] Figure 3 It is a schematic diagram of the matching relationship between the tire and the roller group;
[0026] Figure 4 It is a structural schematic diagram of the pneumatic system of the automobile centering device;
[0027] Figure 5 This is a schematic diagram of the structure of the driving assistance system.
[0028] icon:
[0029] A-target gantry; B-vehicle centering device; C-tested vehicle; D-electrical control cabinet;
[0030] 1-V-type roller unit; 11-roller; 12-bearing; 13-support shaft; 14-roller bracket;
[0031] 2-front axle centering mechanism; 21-tire;
[0032] 3-rear axle roller unit; 4-rear axle centering mechanism; 5-vehicle guide wheel; 6-middle transition frame; 7-vehicle arrival detection switch; 8-centering mechanism cover; 9-solenoid valve; 10-junction box. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0034] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0035] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0036] The vehicle centering device in the present application mainly changes the arrangement of the rollers in the front axle roller unit to make the wheels on the left and right sides of the front axle automatically fall into the middle concave part of the V-shaped roller arrangement structure, thereby improving the positioning accuracy.
[0037] See also Figure 1 , and combined with Figure 2-Figure 4 The automobile centering device in the utility model includes a front axle centering mechanism 2, a rear axle centering mechanism 4, a front axle roller unit, a rear axle roller unit 3, an intermediate transition frame 6, a pneumatic system, a centering mechanism cover plate 8, an automobile guide wheel 5, and a vehicle arrival detection switch 7.
[0038] The front axle roller unit comprises a V-shaped roller unit 1, which is installed on both sides of the front axle centering mechanism 2 and is used to position the tires 21 on the left and right sides of the front axle of the vehicle respectively;
[0039] The rear axle roller unit 3 is installed on both sides of the rear axle centering mechanism 4, and is used to position the wheels on the left and right sides of the rear axle of the vehicle respectively.
[0040] The V-shaped roller unit 1 on each side includes two rows of roller groups inclined toward each other, forming a V-shaped roller arrangement structure of the front axle roller unit.
[0041] By installing the V-shaped roller unit 1 on both sides of the front axle centering mechanism 2, the left and right wheels can be effectively and automatically dropped into the concave portion in the middle of the V-shaped roller unit 1, thereby improving the positioning accuracy and overcoming the limitation that the boss spacing of the existing front axle roller cannot adapt to the sizes of tires 21 of different vehicles.
[0042] The two rows of roller groups tilted towards each other are mirror-symmetrical in the center, and can form an effective middle concave part. When the vehicle drives behind the V-shaped roller group and shifts into neutral, the tire 21 automatically stops at the concave part in the middle position.
[0043] Each row of roller groups includes a plurality of rollers 11 arranged in parallel, and each of the rollers 11 is rotatably mounted on a roller support 14 via a bearing 12 .
[0044] Specifically, the roller assembly is assembled from a roller 11, a bearing 12, and a support shaft 13. The roller assembly effectively supports the weight of the vehicle and enables the vehicle to slide freely on the roller assembly. The support shaft 13 is fixed by pressure plates on both sides.
[0045] Furthermore, a support shaft 13 for supporting the drum 11 is mounted on the drum bracket 14 . The support shaft 13 passes through the entire axial length of the drum 11 , and is mounted on the drum bracket 14 through the bearings 12 at both ends of the support shaft 13 .
[0046] The vehicle arrival detection switch 7 is arranged on both sides of the front axle roller unit, and the vehicle arrival detection switch 7 is used to detect whether the wheels on the left and right sides enter the V-shaped roller unit 1.
[0047] The vehicle arrival detection switch 7 is installed on the steel cover plates on both sides of the front axle centering expansion frame. After the vehicle enters the centering device and the two front tires 21 enter the front axle V-shaped roller group of the centering device, the vehicle arrival detection switch 7 detects the tires 21 and feeds back a signal to the host computer, indicating that the vehicle is in place and the next step of vehicle straightening can be carried out.
[0048] The front axle centering mechanism 2 connects the expansion frames on both sides of the front axle through a synchronization mechanism, and by adjusting the connecting rod length of the synchronization mechanism, the positions of the expansion frames on both sides of the front axle are kept consistent relative to the center line of the front axle centering mechanism 2.
[0049] The rear axle centering mechanism 4 connects the expansion frames on both sides of the rear axle through a synchronization mechanism, and by adjusting the connecting rod length of the synchronization mechanism, the positions of the expansion frames on both sides of the rear axle are kept consistent relative to the center line of the rear axle centering mechanism 4 .
[0050] In the automobile centering device B of the present invention, in the length direction of the automobile centering device B, the center line of the rear axle centering mechanism 4 coincides with the center line of the front axle centering mechanism 2 .
[0051] That is, when the equipment is positioned, the laser line projected by the laser locator is used to adjust the center pointers of the front axle centering mechanism 2 and the rear axle centering mechanism 4 to a straight line.
[0052] After the center lines of the front axle centering mechanism 2 and the rear axle centering structure coincide, the pads of the front axle centering mechanism 2 and the rear axle centering mechanism 4 are respectively welded firmly on site to the pre-buried steel in the pit.
[0053] The intermediate transition frame 6 is arranged between the front axle centering mechanism 2 and the rear axle centering mechanism 4, and the length of the intermediate transition frame 6 can be adjusted and customized according to the wheelbase of different vehicles.
[0054] The pneumatic system is composed of a cylinder, an air pressure regulating device, a solenoid valve 9, an air pipe, etc. The cylinder is connected to the front and rear axle centering mechanism 4 through a connecting rod, serving as a power source for the front and rear axle expansion frames.
[0055] The centering mechanism cover plate 8 is laid on the equipment steel frame after the vehicle centering device B is fully installed and debugged. The vehicle guide wheels 5 are installed on the centering mechanism cover plate 8, one row on each side. The left and right rollers in the vehicle entry direction are installed in a V shape to facilitate the vehicle to enter the centering device.
[0056] See also Figure 5 The present application also provides a driving assistance system, including a target gantry A, an electrical control cabinet D and the above-mentioned vehicle centering device B. The vehicle C under test is parked on the vehicle centering device B before calibration, and the vehicle is straightened by the front and rear axle expansion rods of the vehicle centering device B, and then the factory calibration of the vehicle camera or radar system is performed.
[0057] It should be pointed out that the number of rollers of each side of the roller group in the front axle V-type roller unit 1 can be adjusted according to the wheelbase range C of the vehicle being tested to meet the actual positioning requirements.
[0058] After the front axle tire 21 of the vehicle falls into the front axle V-shaped roller unit 1, the vehicle is shifted into neutral gear, and the center of the front axle of the vehicle coincides with the center of the front axle of the centering mechanism.
[0059] Combination Figure 4 The pneumatic system of the vehicle centering device B is composed of a cylinder, a solenoid valve 9, a gas pressure adjustment device, an air pipe, etc. The solenoid valve 9 and other sensor cables are all integrated on the junction box 10. The solenoid valve 9 and the junction box 10 are fixed to the lower part of the intermediate transition frame 6, and the cylinder inlet and return pipes are arranged from there to the front and rear axles respectively.
[0060] The vehicle arrival detection switch 7 is installed on the outside of the front axle V-shaped roller unit 1, and the detection switch can adjust the sensing distance according to different vehicle wheel tracks.
[0061] The centering mechanism cover plate 8 is laid as a whole after the centering device main frame and the centering device are fully adjusted. The cover plate is adjusted to the same horizontal plane and then fixed to the centering device steel frame by screws.
[0062] It should be emphasized that the utility model effectively solves the problem of inaccurate vehicle positioning during ADAS calibration by providing a V-shaped roller unit 1. The front axle of the vehicle centering device B is changed to a V-shaped wheel structure, which can adapt to tires of different specifications on different vehicles, improves the ADAS calibration accuracy, shortens the vehicle off-line inspection cycle, and improves production efficiency.
[0063] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.
[0064] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A vehicle centering device, characterized in that: It includes a front axle centering mechanism and a front axle roller unit, wherein the front axle roller unit includes a V-shaped roller unit, and the V-shaped roller unit is installed on both sides of the front axle centering mechanism, and is used to position the wheels on the left and right sides of the front axle of the vehicle respectively; The V-shaped roller unit on each side includes two rows of roller groups inclined toward each other, forming a V-shaped roller arrangement structure of the front axle roller unit.
2. The vehicle centering device according to claim 1, characterized in that: The two rows of roller groups tilted towards each other are mirror-symmetrical in center.
3. The vehicle centering device according to claim 1, characterized in that: Each row of the roller groups includes a plurality of rollers arranged in parallel, and each roller is rotatably mounted on a roller support via a bearing.
4. The vehicle centering device according to claim 3, characterized in that: A support shaft for supporting the roller is installed on the roller bracket. The support shaft passes through the entire axial length of the roller and is installed on the roller bracket through the bearings at both ends of the support shaft.
5. The vehicle centering device according to claim 1, characterized in that: Vehicle arrival detection switches are arranged on both sides of the front axle roller unit, and the vehicle arrival detection switches are used to detect whether the wheels on the left and right sides enter the V-shaped roller unit.
6. The vehicle centering device according to any one of claims 1 to 5, characterized in that: It also includes a rear axle centering mechanism, and rear axle roller units are arranged on both sides of the rear axle centering mechanism. In the length direction of the vehicle centering device, the center line of the rear axle centering mechanism coincides with the center line of the front axle centering mechanism.
7. The vehicle centering device according to claim 6, characterized in that: The front axle centering mechanism connects the expansion frames on both sides of the front axle through a synchronization mechanism, and by adjusting the connecting rod length of the synchronization mechanism, the positions of the expansion frames on both sides of the front axle are kept consistent relative to the center line of the front axle centering mechanism.
8. The vehicle centering device according to claim 6, characterized in that: The rear axle centering mechanism connects the expansion frames on both sides of the rear axle through a synchronization mechanism, and by adjusting the connecting rod length of the synchronization mechanism, the positions of the expansion frames on both sides of the rear axle are kept consistent relative to the center line of the rear axle centering mechanism.
9. The vehicle centering device according to claim 6, characterized in that: An intermediate transition frame is arranged between the front axle centering mechanism and the rear axle centering mechanism, and the length of the intermediate transition frame can be adjusted according to the wheelbase of different vehicles.
10. A driving assistance system, characterized in that: The invention comprises a target gantry, an electrical control cabinet and a vehicle centering device as claimed in any one of claims 1 to 9. The vehicle under test is parked on the vehicle centering device before calibration, the vehicle is straightened by the front and rear axle expansion rods of the vehicle centering device, and then the factory calibration of the vehicle camera or radar system is carried out.