Vehicle center line positioning device

Abstract

The utility model provides a vehicle center line positioning device which comprises a base plate, a fixing clamping piece, a laser positioner and a laser projector, the base plate is provided with an installation base face, the fixing clamping piece is fixedly connected with the base plate from one side of the installation base face, the installation base face is provided with a positioner installation portion, and the laser projector is arranged on the positioner installation portion. The laser positioner can be fixedly connected with the positioner installation part and emit linear laser perpendicular to the installation base plane, the laser projector is fixedly connected with the substrate, and the laser projector is provided with a strip-shaped emission hole extending in the plane parallel to the installation base plane. The device can be installed on the outer side of a wheel, the center position of the wheel is positioned through the laser positioner, a linear projection is formed on the ground through the laser projector, the linear projection is the contour line of a vehicle, a vertical connecting line is made based on the contour lines on the two sides of the vehicle, the midpoint is solved, and then the center line of the vehicle can be obtained. And compared with a manual scribing method, the precision is higher, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile detection, in particular to a vehicle centerline positioning device. Background Art

[0002] National standards such as GB15742-2019 "Performance Requirements and Test Methods for Horns for Motor Vehicles" and GB15084-2022 "Performance and Installation Requirements for Indirect Vision Devices for Motor Vehicles" stipulate the requirements for locating the vehicle centerline. The longitudinal centerline is an important characterization parameter for determining the reference coordinates of other relative detection points. Therefore, its accuracy is related to the effectiveness of subsequent detection tests.

[0003] The determination of the longitudinal centerline of a vehicle is based on the longitudinal lines of the vehicle's contour on both sides. At present, the usual method for determining the longitudinal contour lines of a vehicle is: using the rear wheel of the vehicle as the reference line method, using a plumb bob, a long ruler, and a marker to draw the line, using the rear wheel positioning of the vehicle, facing the rear wheel, select two points before and after the vertical centerline of the rear wheel, use a plumb bob to hang lines at the two points to determine the projection points, then use a long ruler to connect the two points and extend them toward the rear of the vehicle, respectively determine two points on the left and right sides of the vehicle at equal distances from the projection point of the rear wheel center, and connect the lines respectively; find the midpoint of the two lines, and extend the lines, which constitute the centerline of the vehicle.

[0004] The aforementioned vehicle marking method uses only a simple ruler and plumb bob to visually determine the plumb bob's vertical point. However, due to the significant influence of human factors during the measurement process, this method deviates from the actual results, resulting in relatively low data accuracy. Similarly, human factors also have a significant impact during marking, and errors are unavoidable. Patent application number CN201820567236.7 discloses a vehicle centerline calibration device that uses laser reflection to determine the centerline. While this device offers higher accuracy than manual marking, it is complex in structure and requires high ground flatness during use, which can be inconvenient. Utility Model Content

[0005] In order to solve the above problems, the present invention provides a vehicle centerline positioning device, which can determine the centerline more accurately than manual marking, and the device has a simple structure and is easy to operate.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A vehicle centerline positioning device includes a base plate, a fixing clamp, a laser locator and a laser projector. The base plate has a mounting base surface. The fixing clamp is fixedly connected to the base plate from one side of the mounting base surface. The mounting base surface is provided with a locator mounting portion. The laser locator can be fixedly connected to the locator mounting portion and emit a linear laser perpendicular to the mounting base surface. The laser projector is fixedly connected to the base plate and is provided with a strip-shaped emission hole extending on a plane parallel to the mounting base surface.

[0008] Furthermore, the fixing clamp is detachably connected to the base plate.

[0009] Furthermore, the substrate is provided with a mounting slot of a rectangular structure passing through the mounting base surface, and the fixing clamp includes a mounting base plate, a mounting block connected to the first side of the mounting base plate, and a plurality of claws connected to the second side of the mounting base plate, and the mounting block is movably embedded in the mounting slot and fixedly connected to the substrate.

[0010] Furthermore, the mounting slot has two short side inner walls and two long side inner walls, and the mounting block includes two connecting fitting walls parallel to the short side inner walls and two sliding fitting walls parallel to the long side inner walls, the spacing between the two sliding fitting walls corresponds to the spacing between the two long side inner walls and the sliding fitting walls are slidingly fitted with the long side inner walls, and the spacing between the two connecting fitting walls is smaller than the spacing between the two short side inner walls.

[0011] Furthermore, the vehicle centerline positioning device also includes a fixed screw; the inner wall of the short side is provided with a plug-in hole that passes through the entire substrate, and the connecting matching wall is provided with a matching hole that passes through the entire substrate corresponding to the position of the plug-in hole, and the fixed screw can be threadedly connected to the plug-in hole and the matching hole.

[0012] Furthermore, the base plate is symmetrically provided with two mounting notches, each mounting notch corresponds to a fixing clamp, and each fixing clamp is provided with two claws.

[0013] Furthermore, the laser locator is arranged between the two installation notches.

[0014] Furthermore, the base plate has a guide rail extending perpendicular to the installation base surface, the laser projector includes an emitting portion and a base, and the base is provided with a matching piece that can be slidably connected to the guide rail.

[0015] Furthermore, the guide rail has a T-shaped sliding groove, and the matching piece has a T-shaped sliding block that can cooperate with the T-shaped sliding groove.

[0016] Furthermore, a level calibrator is connected to one side edge of the substrate.

[0017] The application of this utility model can achieve the following beneficial effects:

[0018] 1. The utility model can be installed on the outside of the wheel, locate the center position of the wheel through a laser locator, and form a straight line projection on the ground through a laser projector. The straight line projection is the contour line of the vehicle. Based on the contour lines on both sides of the vehicle, a vertical line is drawn to find the midpoint to obtain the center line of the vehicle. Compared with the manual marking method, the accuracy is higher, the structure is simple, and the operation is convenient.

[0019] 2. In some embodiments of the present invention, the fixing clamp is detachably connected to the base plate and can adjust its position, thereby ensuring installation accuracy and adapting to different types of wheels.

[0020] 3. In some embodiments of the present invention, a level calibrator is provided on one side edge of the substrate, and the level calibrator is used to reduce the projection error of the laser projector and improve the positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the vehicle centerline positioning device in the embodiment;

[0022] Figure 2 for Figure 1 Front view of

[0023] Figure 3 for Figure 1 Schematic diagram of the structure of the laser projector;

[0024] Figure 4 This is a schematic diagram of the working state of the vehicle centerline positioning device;

[0025] In the figure, 1-base plate, 11-mounting base surface, 12-mounting slot, 13-locator mounting part, 14-guide rail, 15-plug hole, 2-fixing clamp, 21-mounting base plate, 22-mounting block, 23-claw, 3-laser locator, 4-laser projector, 41-emitting part, 42-base, 421-T-shaped slider, 43-strip emitting hole, 5-fixing screw, 6-level calibrator, 7-wheel. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0027] Reference Figures 1-3This embodiment provides a vehicle centerline positioning device, which includes a base plate 1, a fixing fixture 2, a laser positioner 3, a laser projector 4, a fixing screw 5 and a level calibrator 6. Specifically:

[0028] The substrate 1 has a mounting base surface 11, and is provided with two mounting notches 12 that penetrate the mounting base surface 11 and are projected as rectangles on the mounting base surface. The mounting notch has two long side inner walls and two short side inner walls, and the arrangement directions of the long side inner walls and the short side inner walls are respectively consistent with the length and width directions of the substrate. The short side inner walls are provided with plug holes 15 that penetrate the entire substrate. A guide rail 14 is provided on the upper part of the substrate and extends perpendicular to the mounting base surface. The guide rail extends toward the side of the substrate forming the mounting base surface, and the guide rail has a T-shaped slide groove. A positioner mounting portion 13 is provided on the mounting base surface at a position between the two mounting notches.

[0029] The fixing clamp 2 includes a mounting base 21, a mounting block 22 connected to the first side of the mounting base and a claw 23 connected to the second side of the mounting base. When in use, the fixing clamp is arranged on one side of the mounting base surface 11 of the substrate, and the mounting block 22 is movably embedded in the mounting slot 12. More specifically, the mounting block has two sliding matching walls parallel to the inner wall of the long side and two connecting matching walls parallel to the inner wall of the short side, and the connecting matching walls are provided with matching holes corresponding to the plug-in holes 15. The spacing between the two sliding matching walls corresponds to the spacing between the two long side inner walls, and the spacing between the two connecting matching walls is smaller than the spacing between the two short side inner walls. The two sliding matching walls of the mounting block slide in contact with the two long side inner walls of the mounting slot, so that the mounting block can slide limitedly along the long side inner wall, thereby adjusting the position of the mounting block in the mounting slot; the fixing screw 5 can form a threaded fit with the plug-in hole 15 and the matching hole, thereby fixing the mounting block inside the mounting slot;

[0030] The laser locator 3 is detachably fixedly connected to the base plate through the locator mounting portion 13, and enables the laser locator to emit a linear laser perpendicular to the mounting base surface 11;

[0031] The laser projector 4 includes an emitting portion 41 and a base portion 42. The emitting portion is provided with a strip-shaped emitting hole extending in a plane parallel to the mounting base surface 11. The emitting portion can form a strip-shaped laser projection parallel to the mounting base surface on a certain support surface perpendicular to the mounting base surface (specifically, the ground when in use). The base portion is provided with a T-shaped slider 421. The T-shaped slider can slidably cooperate with the T-shaped slot to thereby change the position of the laser projector relative to the mounting base surface.

[0032] The level calibrator 6 is installed on the upper part of the base plate 1 to ensure that the installation base surface of the base plate is in a vertical state to avoid deviation of the strip laser formed by the laser projector on the ground.

[0033] Reference Figure 4 The working principle of the present invention is as follows: the laser locator 3 and the laser projector 4 are fixedly installed on the corresponding parts of the base plate 1 respectively, the mounting blocks of the two fixing clamps 2 are embedded in the mounting grooves of the base plate and fixed by the fixing screw 5, the laser locator 3 is started, and the position of the fixing clamp is adjusted according to the laser locator and the level calibrator 6, so that the claw is fixedly connected to the wheel 7 while ensuring that the straight laser emitted by the laser locator is exactly aligned with the center of the tire, and then the laser projector 4 is started, and a straight line is projected on the ground using the strip-shaped emission hole. The straight line is the contour line of one side of the vehicle. When the wheels on both sides of the vehicle are equipped with positioning devices, two contour lines will be formed on both sides of the vehicle. Based on these two contour lines, a vertical line is made to connect them and the midpoint is calculated to obtain the center line of the vehicle.

[0034] Install the laser instrument into the fine-tuning track, and clamp the four claws of the positioning assembly device on the wheel hub stably in turn, turn on the laser pen 71 to correct the linear laser to the center of the wheel hub; then turn on the laser instrument, and the laser instrument projects a circular laser line through the laser hole 61, which is projected downward along the tire tread onto the ground; the laser line formed on the ground is the single-side contour line of the vehicle; similarly, install the same assembly device on the other side, and the single-side contour line of the vehicle is also formed on the ground on the other side; based on this, based on the contour lines on both sides of the vehicle, a vertical line is drawn to find the midpoint, and the vehicle centerline can be obtained.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vehicle centerline positioning device, characterized in that: It includes a substrate, a fixing clamp, a laser locator and a laser projector. The substrate has a mounting base surface. The fixing clamp is fixedly connected to the substrate from one side of the mounting base surface. The mounting base surface is provided with a locator mounting portion. The laser locator can be fixedly connected to the locator mounting portion and emit a linear laser perpendicular to the mounting base surface. The laser projector is fixedly connected to the substrate, and the laser projector is provided with a strip-shaped emission hole extending on a plane parallel to the mounting base surface.

2. A vehicle centerline positioning device according to claim 1, characterized in that: The fixing clamp is detachably connected to the base plate.

3. The vehicle centerline positioning device according to claim 2, characterized in that: The substrate is provided with a mounting slot of a rectangular structure passing through the mounting base surface; the fixing fixture includes a mounting base plate, a mounting block connected to a first side of the mounting base plate, and a plurality of claws connected to a second side of the mounting base plate; the mounting block is movably embedded in the mounting slot and fixedly connected to the substrate.

4. The vehicle centerline positioning device according to claim 3, characterized in that: The mounting slot has two short side inner walls and two long side inner walls, and the mounting block includes two connecting fitting walls parallel to the short side inner walls and two sliding fitting walls parallel to the long side inner walls. The spacing between the two sliding fitting walls corresponds to the spacing between the two long side inner walls and the sliding fitting walls slide together with the long side inner walls. The spacing between the two connecting fitting walls is smaller than the spacing between the two short side inner walls.

5. The vehicle centerline positioning device according to claim 4, characterized in that: It also includes a fixed screw rod; the inner wall of the short side is provided with a plug-in hole that passes through the entire substrate, and the connecting matching wall is provided with a matching hole that passes through the entire substrate corresponding to the position of the plug-in hole, and the fixed screw rod can be threadedly connected to the plug-in hole and the matching hole.

6. The vehicle centerline positioning device according to claim 3, characterized in that: The base plate is symmetrically provided with two mounting notches, each mounting notch corresponds to a fixing clamp, and each fixing clamp is provided with two claws.

7. The vehicle centerline positioning device according to claim 6, characterized in that: The laser locator is arranged between the two installation notches.

8. The vehicle centerline positioning device according to claim 1, characterized in that: The base plate has a guide rail extending perpendicular to the installation base surface. The laser projector includes an emitting part and a base. The base is provided with a matching piece that can be slidably connected to the guide rail.

9. The vehicle centerline positioning device according to claim 8, characterized in that: The guide rail has a T-shaped sliding groove, and the matching piece has a T-shaped sliding block that can match the T-shaped sliding groove.

10. The vehicle centerline positioning device according to claim 1, characterized in that: A level calibrator is connected to one side edge of the substrate.

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