Front wheel automatic alignment device of automobile adas detection alignment platform

Abstract

The front wheel automatic centering device of the automobile ADAS detection centering platform belongs to the field of automobile detection centering platform, overcomes the problem that the longitudinal positioning of the front wheel of the existing centering platform mainly adopts V-shaped positioning block positioning, and according to different vehicle models and different tire specifications, the positioning block needs to be manually adjusted each time, the efficiency is low, and the precision is affected by human factors; The feature is that an automatic positioning device is provided through the end bottom structure, the middle moving structure and the upper end fixed structure, the beneficial effect is that the side sliding ball is increased, the sliding resistance in the Y direction is reduced in the centering and clamping state, and the tire can be protected; The parallel multi-link mechanism is simple and reliable, can be automatically centered, does not need manual adjustment, greatly reduces the adjustment difficulty of the equipment when the vehicle model and the tire are replaced, and improves the working efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive intelligent driving assistance system (ADAS) detection and alignment platforms, and in particular to an automatic front wheel alignment device for automotive intelligent driving assistance system (ADAS) detection and alignment platforms. Background Technology

[0002] Automotive inspection technology involves checking a vehicle to determine its technical condition or operational capability. During factory testing, the inspection of intelligent driver assistance systems (ADAS) is particularly important. The core of ADAS is environmental perception. ADAS uses sensors such as cameras, radar, lasers, and ultrasonic sensors to detect light, heat, pressure, or other variables used to monitor the vehicle's status. These sensors are typically located on the front and rear bumpers, side mirrors, or windshield. With technological advancements and increasing consumer emphasis on vehicle safety, advanced driver assistance systems continue to evolve.

[0003] ADAS (Advanced Driver Assistance System) calibration and testing require vehicle data in the X, Y, and Z three-dimensional directions. Calibration and testing must be performed on a alignment platform. The platform's function is to accurately locate the vehicle's zero-point coordinates, ensuring the consistency between the test calibration zero-point and the vehicle's zero-point coordinates, thereby guaranteeing the accuracy of the measurement calibration data. The vehicle drives onto the alignment platform, and the push rods on the front and rear sides expand and push the vehicle until its longitudinal axis coincides with the platform's longitudinal axis (X-direction). The front wheels then rest in the alignment device at the front of the platform, aligning the line connecting the centers of the left and right front wheels with the line connecting the centers of the left and right alignment devices on the platform (Y-direction) and perpendicular to the platform's longitudinal axis. The center heights of the front and rear wheels are aligned (Z-direction). Only after the vehicle is aligned can ADAS system calibration and testing be performed. Previously, front wheel alignment on alignment platforms primarily used V-shaped positioning blocks, such as... Figure 3As shown, this structure is only applicable to tires of one specification size. For larger or smaller-sized tires, after the front wheels fall into the V-shaped positioning blocks, the contact positions between tires of different sizes and the V-shaped positioning blocks are different, and the height of the tire center point from the ground (in the Z direction) will change. The height of the center of the larger tire from the ground increases, and the height of the center of the smaller tire from the ground decreases. In this way, the center heights of the front and rear tires will be inconsistent, which will affect the results of ADAS detection and calibration. The摆正platform with this structure can only be applied to vehicles with tires of one specification size, and its adaptability is relatively single. If the V-shaped positioning structure is replaced with a replaceable one, the mechanism of the摆正platform will become complicated, the cost will increase, and the processes of replacement, installation, and adjustment will be time-consuming and laborious, resulting in reduced efficiency. The front-wheel automatic centering device of the摆正platform of the present invention adopts a self-centering synchronous link mechanism, which can automatically adjust according to the size of the tire, eliminating the error of manual adjustment, and being applicable to different tire specifications of various vehicle models, with accurate precision, wide application range, and high efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art. In view of the fact that the longitudinal positioning method of the front wheels is a fixed method, the present invention provides a front-wheel automatic centering device for an automotive ADAS detection摆正platform, which eliminates the error of manual adjustment, is applicable to different tire specifications of various vehicle models, has accurate precision, wide application range, and high efficiency.

[0005] According to the technical solution provided by the invention, the front-wheel automatic centering device of the automotive ADAS detection摆正platform comprises a lower bottom structure, a middle moving structure, and an upper fixed structure. The lower bottom structure consists of a base, a multi-link mechanism, connecting studs, a clamping plate, a gas spring, a multi-link mounting seat, a multi-link mounting bottom plate, a connecting rod, and a connecting stud guiding hole. At both ends of the base, there are symmetrically arranged U-shaped structures on the left and right. A multi-link mounting bottom plate is arranged on the base, and the multi-link mounting bottom plate is located in the middle of the two U-shaped structures. On the left and right U-shaped structure walls close to the center, two rectangular square holes are respectively opened.

[0006] On the rectangular cover plates of the two U-shaped structures, there are connecting stud guiding holes; the multi-link mechanism is a parallelogram frame in the shape of a Chinese character "mu" formed by connecting rods through bolts. On the left and right connecting rods in the middle of the parallelogram frame in the shape of a Chinese character "mu", there are respectively gas spring mounting holes, and the gas spring is fixed on the gas spring mounting holes through bolts; on the upper and lower connecting rods in the middle of the parallelogram frame in the shape of a Chinese character "mu", there are respectively multi-link mounting seats, and at the left and right ends of the parallelogram frame in the shape of a Chinese character "mu", there are respectively connecting studs, and a clamping plate is arranged in the middle of the connecting studs; the multi-link mechanism is installed on the multi-link mounting bottom plate on the base through the multi-link mounting seat. The connecting rod with the connecting stud passes through the rectangular square holes on the left and right U-shaped structure walls, and the connecting stud passes through the connecting stud guiding hole and the pad groove opening, and is connected to the moving slope plate with connecting screws.

[0007] The gas spring is used as the power source for its inward contraction. Under the action of external force, the multi-link mechanism expands synchronously along the guide hole, and under the action of the gas spring, the multi-link mechanism contracts synchronously to press the tire, ensuring that the center line of the tire coincides with the center of the alignment device.

[0008] The intermediate moving structure consists of a roller, a pad, a needle roller bearing, and fixing screws. The pad has a groove, and the connecting stud passes through the groove. Needle roller bearings are installed at both ends of the pad. A roller is fixedly installed in the middle of the pad. The pad is connected to the lower bottom structure by fixing screws.

[0009] The upper fixing structure consists of a movable slope plate, a side sliding roller, a connecting screw, and an adjusting screw. The side sliding roller is provided on the inner side of the movable slope plate. The movable slope plates are symmetrically installed on the left and right sides above the pad plate. The connecting stud passes through the groove of the pad plate and is connected to the movable slope plate by the connecting screw. The adjusting screw is fixed to the pad plate through the long groove of the movable slope plate. The outer side of the movable slope plate has a slope.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The parallel multi-link mechanism is simple and reliable. Synchronous expansion and contraction can automatically center, eliminating the need for manual adjustment.

[0012] The joint can accommodate tires of various sizes, greatly reducing the difficulty of adjusting the equipment when changing vehicle models and tires.

[0013] Improve work efficiency.

[0014] 2: The addition of a side sliding roller reduces the sliding resistance in the Y direction under centering and clamping conditions, thus improving the stability of the system.

[0015] Tires serve a protective function;

[0016] 3. Install needle roller bearings under the movable ramp to allow it to retract and extend freely, ensuring smooth movement when vehicle tires enter.

[0017] The automatic alignment process in the device is smoother and more unobstructed. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of a multi-link mechanism.

[0020] Figure 3 This is a schematic diagram of the V-shaped structure correction device.

[0021] Figure 4 This is a schematic diagram of the operation of the correction device of the present invention.

[0022] 1. Base

[0023] 2. Roller

[0024] 3. Pad

[0025] 4. Moving slope

[0026] 5. Side sliding rollers

[0027] 6. Connecting screws

[0028] 7. Adjusting screws

[0029] 8. Needle roller bearings

[0030] 9. Fixing screws

[0031] 10. Connecting rod

[0032] 11. Connecting studs

[0033] 12. Pallet

[0034] 13. Gas spring

[0035] 14. Multi-link mounting base

[0036] 15. Multi-link mounting base plate

[0037] 16. Connecting stud guide hole

[0038] 17. Groove of pad Implementation

[0039] The following is in conjunction with the appendix Figures 1-3 The present invention will be described in detail below.

[0040] According to the technical solution provided by the invention, the front-wheel automatic alignment device of the vehicle detection alignment platform consists of a lower bottom structure, a middle moving structure, and an upper fixed structure. The lower bottom structure consists of a base (1), a multi-link mechanism, a connecting stud (11), a clamping plate (12), a gas spring (13), a multi-link mounting seat (14), a multi-link mounting bottom plate (15), a connecting rod (10), and a connecting stud guiding hole (16). Among them, both ends of the base (1) are provided with left-right symmetric U-shaped structures. A multi-link mounting bottom plate (15) is arranged on the base (1), and the multi-link mounting bottom plate (15) is arranged in the middle of the two U-shaped structures. Two rectangular square holes are respectively opened on the left and right U-shaped structure walls close to the center, and connecting stud guiding holes (16) are arranged on the rectangular cover plates of the left and right U-shaped structures; the multi-link mechanism is a parallelogram frame in the shape of a Chinese character "mu" formed by connecting the connecting rods (10) with bolts. Gas spring mounting holes are respectively arranged on the middle left and right connecting rods (10) of the parallelogram frame in the shape of a Chinese character "mu", and the gas spring (13) is fixed on the gas spring mounting holes with bolts; multi-link mounting seats (14) are respectively arranged on the middle upper and lower connecting rods (10) of the parallelogram frame in the shape of a Chinese character "mu", and connecting studs (11) are respectively arranged at the left and right ends of the parallelogram frame in the shape of a Chinese character "mu", and a clamping plate (12) is arranged in the middle of the connecting stud (11); the multi-link mechanism is installed on the multi-link mounting bottom plate (15) on the base (1) through the multi-link mounting seat (14). The connecting rod with the connecting stud (11) passes through the rectangular square holes on the left and right U-shaped structure walls, and the connecting stud (11) passes through the connecting stud guiding hole (16) and the pad groove (17), and is connected to the moving slope plate (4) with a connecting screw (6); the lower end structure plays the role of bearing weight and supporting protection. It bears part of its own and the load's weight, supports and protects the multi-link mechanism inside the installer, so that it is not deformed by external forces, and ensures the smoothness of its movement; the multi-link mechanism adopts a parallelogram structure, which is simple and reliable.

[0041] The gas spring (13) is used as the power source for its inward contraction. Under the action of external force, the multi-link mechanism expands synchronously along the guiding hole. Under the action of the gas spring (13), the multi-link mechanism contracts synchronously to press the tire tightly, ensuring that the center line of the tire coincides with the center of the alignment device.

[0042] The middle moving structure consists of a roller (2), a pad (3), needle roller bearings (8), and fixing screws (9). Among them, a pad groove (17) is arranged on the pad (3), and the connecting stud (11) passes through the pad (3) through the pad groove (17). Needle roller bearings (8) are arranged at both ends of the pad (3), and a roller (2) is fixedly installed in the middle of the pad (3). The roller (2) plays the role of laterally moving the front wheel. The pad (3) is connected to the lower bottom structure with a fixing screw (9); the middle structure is the roller

[0043] (2) The connecting support part ensures that the front, rear, left and right rollers (2) are on the same plane, which is the basic plane for vehicle ADAS detection and calibration; the needle roller bearing installed on the pad (3) can ensure that the moving ramp above moves more smoothly and reduce frictional resistance.

[0044] The upper fixed structure consists of a movable ramp (4), a side sliding roller (5), a connecting screw (6), and an adjusting screw (7). The movable ramp (4) is provided with a side sliding roller (5) on its inner side. The symmetrical side sliding rollers serve to clamp and position the front wheel and hold it in place. At the same time, they can reduce resistance when the front wheel moves laterally and protect the tire from damage. The movable ramp (4) is symmetrically installed on the upper side of the pad (3). The connecting stud (11) passes through the groove (17) of the pad and is connected to the movable ramp (4) by the connecting screw (6). The movable ramp (4) moves symmetrically inward and outward through a multi-link mechanism. The multi-link mechanism drives the movable ramp (4) to move symmetrically inward and outward on the pad (3). The adjusting screw (7) is fixed to the pad (3) through the long groove on the movable ramp (4). The movable ramp (4) has a slope on its outer side to facilitate the entry and exit of the wheel.

[0045] The operating principle is as follows: Figure 4 As shown, when the front wheels of the vehicle enter the automatic centering device, under the combined force of the vehicle's gravity and driving force, the two movable ramps (4) will open outward. Since the two movable ramps (4) are fixed to the connecting stud (11) by the connecting screws (6), the connecting stud (11) drives the two movable ramps (4) to open outward synchronously along the connecting stud guide hole (16) through the parallelogram structure formed by the lower multi-link mechanism and the clamping plate (12). After the vehicle stops, the tires are tangent to the plane of the roller (2) and the side sliding roller (5). The front and rear wheels are on the same horizontal plane on the roller, which ensures that the center of the front and rear tires is at the same height and that the Z direction (height direction) is at the zero point of the coordinate. At the same time, under the action of the gas spring (13), the parallel multi-link mechanism, the connecting stud (11), the clamping plate (12), the connecting screw (6), and the moving ramp (4) and the side sliding roller (5) are driven to retract inward to clamp the tires so that they are aligned with the center line position, that is, the zero point of the X-axis direction (travel direction) of the platform is aligned. Then, under the action of the thrust in the Y-axis direction (lateral direction), the tires can slide along the side sliding roller (5) until they are adjusted to the zero point of the Y direction.

Claims

1. The front-wheel automatic centering device of the automotive ADAS detection centering platform consists of a lower bottom structure, a middle moving structure, and an upper fixed structure. The lower bottom structure consists of a base (1), a multi-link mechanism, connecting studs (11), a clamping plate (12), a gas spring (13), a multi-link mounting seat (14), a multi-link mounting bottom plate (15), a connecting rod (10), and a connecting stud guiding hole (16). At both ends of the base (1), there are left and right symmetric U-shaped structures. A multi-link mounting bottom plate (15) is arranged on the base (1), and the multi-link mounting bottom plate (15) is located between the two U-shaped structures. Two rectangular square holes are respectively opened on the left and right U-shaped structure walls near the center. Connecting stud guiding holes (16) are arranged on the rectangular cover plates of the left and right U-shaped structures; The multi-link mechanism is a parallelogram frame in the shape of a Chinese character "mu" formed by connecting the connecting rods (10) with bolts. Gas spring mounting holes are respectively arranged on the left and right connecting rods (10) in the middle of the parallelogram frame in the shape of a Chinese character "mu". The gas spring (13) is fixed on the gas spring mounting holes with bolts; Multi-link mounting seats (14) are respectively arranged on the upper and lower connecting rods (10) in the middle of the parallelogram frame in the shape of a Chinese character "mu". Connecting studs (11) are respectively arranged at the left and right ends of the parallelogram frame in the shape of a Chinese character "mu", and a clamping plate (12) is arranged in the middle of the connecting stud (11); The multi-link mechanism is installed on the multi-link mounting bottom plate (15) on the base (1) through the multi-link mounting seat (14). The connecting rod with the connecting stud (11) passes through the rectangular square holes on the left and right U-shaped structure walls. The connecting stud (11) passes through the connecting stud guiding hole (16) and the pad groove (17), and is connected to the moving slope plate (4) with a connecting screw (6).

2. The automatic front wheel alignment device of the automotive ADAS detection and alignment platform according to claim 1, characterized in that, Gas spring mounting holes are respectively arranged on the left and right connecting rods (10). The gas spring (13) is the power source for its inward contraction. Under the action of an external force, the multi-link mechanism expands synchronously along the guiding hole. Under the action of the gas spring (13), the multi-link mechanism contracts and compresses the tire synchronously, ensuring that the center line of the tire coincides with the center of the centering device.

3. The automatic front wheel alignment device of the automotive ADAS detection and alignment platform according to claim 1, characterized in that, The middle moving structure consists of a roller (2), a pad (3), a needle roller bearing (8), and a fixing screw (9). A pad groove (17) is arranged on the pad (3). The connecting stud (11) passes through the pad (3) through the pad groove (17). Needle roller bearings (8) are arranged at both ends of the pad (3). A roller (2) is fixedly installed in the middle of the pad (3). The roller (2) plays the role of laterally moving the front wheel. The pad (3) is connected to the lower bottom structure with a fixing screw (9).

4. The front wheel automatic alignment device of the automotive ADAS detection and alignment platform according to claim 1, characterized in that, The upper fixed structure consists of a moving slope plate (4), a side-slip roller (5), a connecting screw (6), and an adjusting screw (7). Side-slip rollers (5) are arranged on the inner side of the moving slope plate (4). The moving slope plates (4) are symmetrically installed on the left and right above the pad (3). The connecting stud (11) passes through the pad groove (17) and is connected to the moving slope plate (4) with a connecting screw (6). The outer side of the moving slope plate (4) has a slope for the wheel to enter and exit.

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