Measuring device

By designing a measuring device that includes a slider and a measuring arm, and utilizing a ball head and damping adjustment mechanism, combined with a compass and a level, high-precision measurement of the distance between the wheel and the vehicle body is achieved, solving the problem of insufficient measurement accuracy in existing technologies and simplifying the operation process.

CN223678391UActive Publication Date: 2025-12-16GUANGZHOU AUTOMOBILE GROUP CO LTD
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Patent Information

Application Number
CN202520017446.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-03
Publication Date
2025-12-16
Estimated Expiration
2035-01-03

AI Technical Summary

Technical Problem

In existing technologies, the accuracy of measuring the distance between the wheel and the vehicle body is relatively low.

Method used

A measuring device comprising a first slider, a first measuring arm, a second slider, and a second measuring arm is designed. By adjusting the angle between the slider and the vehicle, the measuring arm moves in the vertical direction. Combined with a ball joint and a damping adjustment mechanism, the same reference benchmark for the measurement parameters is achieved. A compass and a level are used to improve the measurement accuracy.

Benefits of technology

It improves the accuracy and ease of operation of wheel-to-vehicle distance measurement, reduces measurement difficulty, and enhances the service life and production efficiency of the measuring device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a measuring device, which comprises a first sliding block and a first measuring arm, the first measuring arm extends along a first direction, and the first sliding block is movably arranged on the first measuring arm along the first direction; a second slide block and a second measuring arm, the second slide block is fixedly connected with the first measuring arm, the second measuring arm extends along a second direction, the second slide block is movably arranged on the second measuring arm along the second direction, and the first direction is perpendicular to the second direction; the base is suitable for being connected with a vehicle body, and the first sliding block is movably connected to one side, in the second direction, of the base so as to adjust the included angles between the extending direction of the first measuring arm and the X direction, the Y direction and the Z direction of the vehicle to be measured. According to the measuring device provided by the utility model, the reference standards of a plurality of parameters during measurement can be the same, the measuring precision is improved, and the relative angle between the first sliding block and the base is adjusted, so that the moving directions of the first measuring arm and the second measuring arm can be matched with the coordinate system where the parameters to be measured are located.
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Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is related to a measuring device. BACKGROUND

[0002] In the process of vehicle development, in some verification tests, the distance between the wheel and the vehicle body needs to be measured, and then the displacement change of the suspension system relative to the vehicle body is obtained, and in the related art, the measurement precision of the measuring device for the distance between the wheel and the vehicle body is low. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at solving one of the technical problems existing in the prior art at least.

[0004] According to the measuring device of the utility model, be used for measuring the distance of wheel and vehicle body, the measuring device includes: first sliding block and first measuring arm, the first measuring arm extends along the first direction, the first sliding block is movably arranged on the first measuring arm along the first direction, second sliding block and second measuring arm, the second sliding block is fixedly connected with the first measuring arm, the second measuring arm extends along the second direction, the second sliding block is movably arranged on the second measuring arm along the second direction, the first direction and the second direction are perpendicular, base, the base is suitable for being connected with vehicle body, the first sliding block is movably connected on the base in the second direction one side, to adjust the extension direction of the first measuring arm and the included angle of the X direction, Y direction and Z direction of the vehicle to be measured.

[0005] According to the measuring device of the utility model, through the movement of the first measuring arm and the second measuring arm in the two directions perpendicular to each other, the multiple parameter reference bases in the measurement process can be made same, thereby improving the measurement precision, by adjusting the angle between the first sliding block and the vehicle to adjust the included angle between the first measuring arm and the vehicle to be measured, the moving direction of the first measuring arm and the second measuring arm can be made parallel with the two coordinate axes of the coordinate system where the parameter to be measured is located on the vehicle respectively, and the measurement difficulty can be reduced.

[0006] According to some embodiments of the utility model, the measuring device further includes: a ball head and a ball head seat, the ball head seat is formed with a containing cavity with an open mouth, the ball part of the ball head is rotatably arranged in the containing cavity, one of the ball head seat and the ball head is fixedly connected with the base, and the other is fixedly connected with the first sliding block.

[0007] According to some embodiments of the utility model, the measuring device further includes: a damping adjusting mechanism, the ball head and the ball head seat are pressed by the damping adjusting mechanism, and the size of the pressing force can be adjusted according to the requirement.

[0008] According to some embodiments of the present application, the first slider is provided with a compass on at least one side in the third direction, the compass is used for detecting the relative angle between the first measuring arm and the north-south direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0009] According to some embodiments of the present application, the compass is detachably connected with the first slider.

[0010] According to some embodiments of the present application, the surfaces on both sides of the first measuring arm in the third direction are planes, and the first slider is provided with a first level meter, and the first level meter is used for detecting the levelness of the surfaces on both sides of the first measuring arm in the third direction.

[0011] According to some embodiments of the present application, the first slider is further provided with a second level meter, and the second level meter is used for detecting the perpendicularity between the first measuring arm and the horizontal plane.

[0012] According to some embodiments of the present application, the first slider is formed with a first guide hole penetrating through the first slider along the first direction, the first measuring arm is movably arranged in the first guide hole, the first slider is further formed with a first locking hole in communication with the first guide hole, and the measuring device further comprises: a first locking member movably arranged in the first locking hole, the first locking member is adapted to abut against the first measuring arm through the first locking hole, so that the first measuring arm is locked relative to the first slider.

[0013] According to some embodiments of the present application, the second slider is formed with a second guide hole penetrating through the second slider along the second direction, the second measuring arm is movably arranged in the second guide hole, the second slider is further formed with a second locking hole in communication with the second guide hole, and the measuring device further comprises: a second locking member movably arranged in the second locking hole, the second locking member is adapted to abut against the second measuring arm through the second locking hole, so that the second measuring arm is fixed relative to the second slider.

[0014] According to some embodiments of the present application, the base is a magnetic member or is provided with a magnetic member, and the magnetic member is adapted to be magnetically connected with the vehicle body.

[0015] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1is a schematic view of a measuring device according to an embodiment of the present application;

[0017] Figure 2 is Figure 1 is an exploded view of the base and the first slider connection shown in Figure 1;

[0018] Figure 3 is a first schematic view of a measuring device and a vehicle according to an embodiment of the present application;

[0019] Figure 4 is a second schematic view of a measuring device and a vehicle according to an embodiment of the present application;

[0020] Figure 5 is a third schematic view of a measuring device and a vehicle according to an embodiment of the present application;

[0021] Figure 6 is a fourth schematic view of a measuring device and a vehicle according to an embodiment of the present application.

[0022] Reference signs:

[0023] 100, measuring device;

[0024] 10, first slider; 11, compass; 12, first level; 13, second level; 14, first locking member;

[0025] 20, first measuring arm;

[0026] 30, second slider; 31, second locking member;

[0027] 40, second measuring arm; 41, contact head;

[0028] 50, base;

[0029] 60, ball head; 61, ball head seat;

[0030] 200, wheel;

[0031] 300, vehicle body; 310, fender; 320, rocker panel. DETAILED DESCRIPTION

[0032] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numbers represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0033] Reference is made below to Figures 1-6 A measuring device 100 according to an embodiment of the present application is described below.

[0034] The measuring device 100 according to the embodiments of the present application is used for measuring the distance between the wheel 200 and the vehicle body 300, as shown in Figure 1 and Figure 2 The measuring device 100 comprises a first sliding block 10, a first measuring arm 20, a second sliding block 30, a second measuring arm 40 and a base 50.

[0035] Specifically, the first measuring arm 20 extends along a first direction, the first sliding block 10 is movably arranged on the first measuring arm 20 along the first direction, the second sliding block 30 is fixedly connected with the first measuring arm 20, the second measuring arm 40 extends along a second direction, the second sliding block 30 is movably arranged on the second measuring arm 40 along the second direction, the first direction is perpendicular to the second direction, the base 50 is adapted to be connected with the vehicle body 300, and the first sliding block 10 is movably connected on one side of the base 50 in the second direction, so as to adjust the angle between the extension direction of the first measuring arm 20 and the X direction, Y direction and Z direction of the vehicle to be measured.

[0036] The measuring device 100 can measure the distance between the wheel 200 and the vehicle body 300, and the measuring device 100 can also measure the distance between the rim of the wheel 200 and the vehicle body 300. The X direction of the vehicle is the front-rear direction of the vehicle, the Y direction of the vehicle is the left-right direction of the vehicle, and the Z direction of the vehicle is the up-down direction of the vehicle.

[0037] When the measuring device 100 measures the distance between the wheel 200 and the vehicle body 300 in the X direction, for example, the distance between the fender 310 on the vehicle body 300 and the wheel 200, as shown in Figure 3 and Figure 4 The base 50 is fixed on the fender 310, and the relative angle between the first sliding block 10 and the base 50 is adjusted, so that the first direction is parallel to the X direction of the vehicle, and the second direction is parallel to the Y direction of the vehicle. Then, the first measuring arm 20 and the second measuring arm 40 are moved, so that the second measuring arm 40 contacts the edge of the tire or the rim in the X direction, the size a between the first measuring arm 20 and the second sliding block 30 at this time is recorded, the second measuring arm 40 contacts the edge of the fender 310 facing the wheel 200 in the X direction, the size b between the first measuring arm 20 and the second sliding block 30 at this time is recorded, and the difference between a and b is the distance between the specified position on the wheel 200 and the vehicle body 300 in the X direction, and a and b are both in the same reference datum.

[0038] When the measuring device 100 measures the distance between the wheel 200 and the vehicle body 300 outside in the Y direction, as shown in Figure 5 and Figure 6As shown, the base 50 is fixed on the wing 310, the relative angle between the first slider 10 and the base 50 is adjusted, the first direction is parallel to the Z direction of the vehicle, the second direction is parallel to the Y direction of the vehicle, then the first measuring arm 20 and the second measuring arm 40 are moved, the second measuring arm 40 is in contact with the tire or the rim in the Y direction, the reading c of the second measuring arm 40 at this time is recorded, the second measuring arm 40 is in contact with the wing 310 in the Y direction, the reading d of the second measuring arm 40 at this time is recorded, and the difference between c and d is the distance between the wheel 200 and the outer side of the vehicle body 300 in the Y direction, and c and d are in the same reference datum.

[0039] The first direction and the second direction are parallel to the directions of two coordinate axes of the coordinate system in which the to-be-measured parameter is located, so that the first measuring arm 20 and the second measuring arm 40 can measure the distance between the wheel 200 and the vehicle body 300 in the specified direction, and the operation process is relatively simple, and the operation difficulty can be reduced.

[0040] Preferably, the second measuring arm 40 is provided with a contact head 41, and the second measuring arm 40 is in contact with the vehicle body 300 and the wheel 200 through the contact head 41, and it can be understood that the second measuring arm 40 will be contaminated by impurities on the wheel 200 and the vehicle body 300 when the second measuring arm 40 is in contact with the vehicle body 300 and the wheel 200, and the contact head 41 can be a piece of corrosion-resistant material, so that the service life of the measuring device 100 can be improved.

[0041] According to the measuring device 100 provided in the embodiment of the utility model, the first measuring arm 20 and the second measuring arm 40 can be moved in two directions perpendicular to each other, so that the reference datum of multiple parameters in the measuring process is the same, thereby improving the measuring precision, and the angle between the first measuring arm 20 and the to-be-measured vehicle is adjusted by adjusting the angle between the first slider 10 and the vehicle, so that the moving direction of the first measuring arm 20 and the second measuring arm 40 is parallel to two coordinate axes of the coordinate system in which the to-be-measured parameter is located, and the measuring difficulty can be reduced.

[0042] In some embodiments of the utility model, as shown in Figure 1 and Figure 2As shown, the measuring device 100 further comprises a ball head 60 and a ball head seat 61, the ball head seat 61 is formed with a containing cavity with an open mouth, the ball part of the ball head 60 is rotatably arranged in the containing cavity, one of the ball head seat 61 and the ball head 60 is fixedly connected with the base 50, and the other is fixedly connected with the first sliding block 10. Thus, by rotating the ball head 60 on the ball head seat 61, the angle between the first sliding block 10 and the X direction, the Y direction and the Z direction of the vehicle to be measured relative to the base 50 can be adjusted, so that the angle between the extension direction of the first measuring arm 20 and the X direction, the Y direction and the Z direction of the vehicle to be measured can be adjusted. Wherein, the ball head 60 and the ball head seat 61 are connected, the structure is relatively simple, and the production difficulty of the measuring device 100 can be reduced. Preferably, the ball head 60 is fixedly connected with the first sliding block 10 by bolts, and the ball head seat 61 is fixedly connected with the base 50 by bolts.

[0043] In some embodiments of the present application, the measuring device 100 further comprises a damping adjustment mechanism, the damping adjustment mechanism is arranged in the ball head seat 61, the ball head 60 and the ball head seat 61 are pressed by the damping adjustment mechanism, the size of the pressing force can be adjusted according to the needs, and the greater the pressing force, the greater the sliding damping.

[0044] When the relative angle between the first measuring arm 20 and the vehicle needs to be adjusted, the corresponding pressing force is selected according to the weight of the base 50, so that the ball head 60 can hover at any position without the need for locking by external locking members during each measurement process, the operation is more convenient, and the measurement difficulty can be further reduced during the measurement process.

[0045] In some embodiments of the present application, as shown in Figures 1-4 The first sliding block 10 is provided with a compass 11 on at least one side of the third direction, and the compass 11 is used for detecting the relative angle between the first measuring arm 20 and the north-south direction, and the first direction, the second direction and the third direction are perpendicular to each other. That is, the first sliding block 10 can be provided with a compass 11 on one side of the third direction, or the first sliding block 10 can be provided with a compass 11 on both sides of the third direction.

[0046] When the measuring device 100 measures the distance between the wheel 200 and the vehicle body 300 in the X direction, after the vehicle is parked, first, a compass 11 is placed on the rocker panel 320 of the vehicle, the angle a between the front and rear direction of the rocker panel 320 and the north-south direction on the compass 11 is recorded, then the base 50 is fixed on the vehicle body 300, the relative angle between the first sliding block 10 and the vehicle body 300 is adjusted, so that the angle between the compass 11 on the first sliding block 10 and the north-south direction is also a, so that the extension direction of the first measuring arm 20 is parallel to the front and rear direction of the rocker panel 320, that is, the extension direction of the first measuring arm 20 is parallel to the X direction of the vehicle. Thus, the measurement accuracy is further improved, and the operation process is relatively simple.

[0047] Preferably, the first sliding block 10 is provided with a compass 11 on both sides of the third direction, so that when the measuring device 100 measures the distance between the wheel 200 and the vehicle body 300 at different positions, the first sliding block 10 is turned over, and the operator can easily read the reading of the compass 11 on the first sliding block 10, thereby further reducing the difficulty of measurement.

[0048] In some embodiments of the present application, the compass 11 is detachably connected with the first sliding block 10. In this way, during the measurement, the compass 11 on the first sliding block 10 can be detached, and the angle between the front-rear direction of the vehicle rocker 320 and the north-south direction is measured, and then the compass 11 is mounted on the first sliding block 10 to indicate the direction of the first measuring arm 20, thereby saving the material cost of the measuring device 100.

[0049] In some embodiments of the present application, as shown in Figures 1-4 , the first measuring arm 20 has a plane surface on both sides of the third direction, and the first sliding block 10 is provided with a first level 12, and the first level 12 is used to detect the levelness of the first measuring arm 20 on both sides of the third direction.

[0050] When the measuring device 100 measures the distance between the wheel 200 and the vehicle body 300 in the X direction, the first sliding block 10 is rotated to adjust the angle of the first measuring arm 20 relative to the vehicle body 300, and when the first level 12 is 0 degrees, the first measuring arm 20 on both sides of the third direction is parallel to the horizontal plane, that is, the coordinate system composed of the first measuring arm 20 and the second measuring arm 40 is parallel to the horizontal plane, and at the same time, the extension direction of the first measuring arm 20 is parallel to the X direction through the compass 11, so that the extension direction of the second measuring arm 40 is also parallel to the Y direction, thereby indicating whether the first measuring arm 20 and the second measuring arm 40 are adjusted in place during the measurement of the distance between the wheel 200 and the vehicle body 300 in the X direction, and further improving the measurement accuracy.

[0051] Preferably, the first level 12 is magnetically connected with the first sliding block 10.

[0052] In some embodiments of the present application, as shown in Figure 1 , Figure 5 and Figure 6 , the first sliding block 10 is further provided with a second level 13, and the second level 13 is used to detect the perpendicularity of the first measuring arm 20 to the horizontal plane.

[0053] When the measuring device 100 measures the distance between the wheel 200 and the outside of the vehicle body 300 in the Y direction, the first slider 10 is rotated to adjust the angle of the first measuring arm 20 relative to the vehicle body 300, and when the second level 13 is 0 degrees and the first level 12 is 90 degrees, the first measuring arm 20 is perpendicular to the horizontal plane, so that whether the first measuring arm 20 is adjusted in place can be indicated, and the measurement accuracy is further improved.

[0054] Preferably, the second level 13 is magnetically connected with the first slider 10.

[0055] In some embodiments of the present application, the first slider 10 is formed with a first guide hole penetrating through the first slider 10 in the first direction, and the first measuring arm 20 is movably arranged in the first guide hole. The first slider 10 is further formed with a first locking hole communicating with the first guide hole, and the measuring device 100 further comprises a first locking member 14 movably arranged in the first locking hole. The first locking member 14 is adapted to abut against the first measuring arm 20 through the first locking hole, so as to lock the first measuring arm 20 relative to the first slider 10.

[0056] By cooperating the first measuring arm 20 in the first guide hole, the first guide hole can limit the first measuring arm 20 in the circumferential direction of the first measuring arm 20, so as to reduce the offset of the first measuring arm 20 when moving in the first direction, improve the measurement accuracy of the measuring device 100, and by setting the first locking member 14, the first locking member 14 can lock the first measuring arm 20 when the first measuring arm 20 is adjusted in place, so as to further reduce the measurement difficulty and improve the measurement accuracy.

[0057] Preferably, the first locking member 14 is a locking bolt, and the first locking hole is a threaded hole, so that the locking and releasing operations of the first locking member 14 are relatively simple, and the measurement difficulty can be further reduced.

[0058] In some embodiments of the present application, the second slider 30 is formed with a second guide hole penetrating through the second slider 30 in the second direction, and the second measuring arm 40 is movably arranged in the second guide hole. The second slider 30 is further formed with a second locking hole communicating with the second guide hole, and the measuring device 100 further comprises a second locking member 31 movably arranged in the second locking hole. The second locking member 31 is adapted to abut against the second measuring arm 40 through the second locking hole, so as to fix the second measuring arm 40 relative to the second slider 30.

[0059] The second guide hole can limit the second measuring arm 40 in the circumferential direction of the second measuring arm 40, so that the offset of the second measuring arm 40 when moving in the second direction can be reduced, the measurement accuracy of the measuring device 100 is improved, the second locking piece 31 can lock the second measuring arm 40 when the second measuring arm 40 is adjusted in place, so as to further reduce the measurement difficulty and improve the measurement accuracy.

[0060] Preferably, the second locking piece 31 is a locking bolt, and the second locking hole is a threaded hole, so that the locking and releasing operations of the second locking piece 31 are relatively simple, and the measurement difficulty can be further reduced.

[0061] In some embodiments of the utility model, the base 50 is a magnetic piece or is provided with a magnetic piece, and the magnetic piece is suitable for magnetic connection with the vehicle body 300. Therefore, the base 50 is convenient to fix and disassemble on the vehicle body 300 during the measurement process, and the measurement difficulty can be further reduced.

[0062] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation of the utility model.

[0063] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0064] In the utility model, unless another definite provision and limitation, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection, also can be communication;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element internal communication or two element's mutual action relationship. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0065] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0066] Although the embodiments of the present utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A measuring device for measuring the distance between a wheel and a vehicle body, characterized in that, include: A first slider and a first measuring arm, wherein the first measuring arm extends along a first direction and the first slider is movably disposed on the first measuring arm along the first direction; The second slider and the second measuring arm are fixedly connected to the first measuring arm. The second measuring arm extends along a second direction. The second slider is movably disposed on the second measuring arm along the second direction. The first direction and the second direction are perpendicular. A base adapted to be connected to a vehicle body, wherein the first slider is movably connected to one side of the base in the second direction to adjust the angle between the extension direction of the first measuring arm and the X, Y and Z directions of the vehicle to be measured.

2. The measuring device according to claim 1, characterized in that, Also includes: The ball head and the ball head seat have an open cavity. The ball part of the ball head is rotatably disposed in the cavity. One of the ball head seat and the ball head is fixedly connected to the base, and the other is fixedly connected to the first slider.

3. The measuring device according to claim 2, characterized in that, The measuring device further includes a damping adjustment mechanism, wherein the ball head and the ball head seat are pressed together by the damping adjustment mechanism, and the magnitude of the pressing force can be adjusted as needed.

4. The measuring device according to any one of claims 1-3, characterized in that, The first slider has a compass on at least one side of the third direction, the compass being used to detect the relative angle between the first measuring arm and the north-south direction, the first direction, the second direction and the third direction being perpendicular to each other.

5. The measuring device according to claim 4, characterized in that, The compass is detachably connected to the first slider.

6. The measuring device according to claim 4, characterized in that, The first measuring arm has two planar surfaces on both sides in the third direction, and the first slider is equipped with a first level, which is used to detect the levelness of the first measuring arm on both sides in the third direction.

7. The measuring device according to claim 6, characterized in that, The first slider is also equipped with a second level, which is used to detect the perpendicularity of the first measuring arm to the horizontal plane.

8. The measuring device according to claim 1, characterized in that, The first slider has a first guide hole extending through it along the first direction. The first measuring arm is movably disposed in the first guide hole. The first slider also has a first locking hole communicating with the first guide hole. The measuring device further includes: a first locking member, which is movably disposed in the first locking hole, and is adapted to pass through the first locking hole and abut against the first measuring arm so that the first measuring arm is locked relative to the first slider.

9. The measuring device according to claim 1, characterized in that, The second slider has a second guide hole extending through it along the second direction. The second measuring arm is movably disposed in the second guide hole. The second slider also has a second locking hole communicating with the second guide hole. The measuring device further includes a second locking member, which is movably disposed in the second locking hole and is adapted to pass through the second locking hole and abut against the second measuring arm so that the second measuring arm is fixed relative to the second slider.

10. The measuring device according to claim 1, characterized in that, The base is a magnetic component or the base is provided with a magnetic component, and the magnetic component is adapted to be magnetically connected to the vehicle body.