Four-wheel positioning equipment

Abstract

The invention provides four-wheel positioning equipment which comprises a base assembly, a stand column assembly arranged on the base assembly, a flat plate mounting structure, a cross beam assembly arranged on the stand column assembly in a sliding mode and a shooting camera fixed to the cross beam assembly. The stand column assembly comprises a first stand column, a lifting driving part fixedly connected with the first stand column, a transmission wheel driven by the lifting driving part to do lifting motion and a transmission chain wound on the transmission wheel, the bottom end of the first stand column is connected to the base assembly, and the flat plate mounting structure is fixed to the first stand column. One end of the transmission chain is fixedly arranged, and the other end of the transmission chain is connected with the cross beam assembly. According to the four-wheel positioning equipment, through lifting of the transmission wheels, the lifting assembly has a large moving stroke, meanwhile, the length of the first stand column is small, and production and transportation are convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle detection, and more specifically, relates to a four-wheel alignment device. Background Art

[0002] The four-wheel alignment equipment is a tool used to detect and adjust the parameters of the vehicle wheel alignment. It mainly measures parameters such as the castor angle, kingpin inclination angle, front wheel camber angle and toe angle of the wheel. The technician can judge whether the wheel alignment is accurate based on the detected parameters. If it is inaccurate, make corresponding adjustments to ensure the stability and controllability of the vehicle. The camera used to take pictures of the wheels is usually installed on the column, and the height of the camera can be adjusted. However, when the four-wheel alignment equipment also has other detection functions, the adjustment stroke required for the camera is longer, and the column is correspondingly longer. An overly long column is not conducive to production and transportation. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide a four-wheel alignment device to solve the technical problem in the prior art that the four-wheel alignment device has diversified functions, resulting in too long columns and being unfavorable for production and transportation.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a four-wheel positioning device, including a base assembly, a column assembly arranged on the base assembly, a flat plate mounting structure, a beam assembly slidably arranged on the column assembly, and a shooting camera fixed to the beam assembly, the column assembly includes a first column, a lifting drive member fixedly connected to the first column, a transmission wheel driven by the lifting drive member for lifting and lowering movement, and a transmission chain wound around the transmission wheel, the bottom end of the first column is connected to the base assembly, the flat plate mounting structure is fixed to the first column, one end of the transmission chain is fixedly arranged, and the other end of the transmission chain is connected to the beam assembly.

[0005] Optionally, the column assembly further includes a second column, which is slidably disposed on the first column along a vertical direction, the motion output end of the lifting drive member is fixedly connected to the second column, and the transmission wheel is rotatably mounted on the second column.

[0006] Optionally, the second column includes two spaced-apart vertical plates and a connecting plate connecting the two vertical plates, the two vertical plates are respectively arranged on opposite sides of the first column, the crossbeam assembly is fixed to the transmission chain through a mounting frame, and a guide wheel is arranged between the mounting frame and the vertical plates.

[0007] Optionally, the vertical plate includes a first side wall portion and a second side wall portion bent and connected to the first side wall portion, the connection between the first side wall portion and the second side wall portion forms an L-shaped limit angle, the first column extends toward the vertical plate to form a limit portion that cooperates with the limit angle, and one end of the transmission chain is fixed to the limit portion; the mounting frame includes a first mounting plate and two second mounting plates respectively connected to the opposite sides of the first mounting plate, the crossbeam assembly is fixed to the first mounting plate, the guide wheels are arranged between the first mounting plate and the first side wall portion, and between the second mounting plate and the second side wall portion, the first side wall portion is provided with a slide groove extending in the vertical direction, and the radial sides of the guide wheel between the first mounting plate and the first side wall portion are clamped in the slide groove.

[0008] Optionally, the beam assembly includes a first beam, a second beam rotatably connected to the first beam, a first elastic member whose two ends are respectively connected to the first beam and the second beam, a first locking assembly and a second locking assembly, and the beam assembly has a use state and a folded state. The first locking assembly is used to lock the beam assembly in the use state, and the second locking assembly is used to lock the beam assembly in the folded state.

[0009] Optionally, the first locking assembly includes a first lock seat fixed to the first cross beam, a second lock seat fixed to the second cross beam, a hinge shaft, two pressing rods hinged to each other through the hinge shaft, and a second elastic member whose two ends are respectively connected to the two pressing rods, one end of the pressing rod has a first clamping portion, the second lock seat has a second clamping portion respectively clamped with the two first clamping portions, and the other end of the pressing rod has a first button portion for pressing.

[0010] Optionally, the second locking assembly includes a third lock seat fixed to the first beam, a fourth lock seat fixed to the second beam, a sliding structure slidably arranged on the third lock seat, and a third elastic member whose two ends are respectively connected to the sliding structure and the third lock seat, the third lock seat and the fourth lock seat are hinged to each other, the sliding structure has a third clamping portion and a second button portion for pressing, and the fourth lock seat has a fourth clamping portion clamped with the third clamping portion; when the third clamping portion and the fourth clamping portion are clamped, the first beam and the second beam are perpendicular to each other.

[0011] Optionally, the number of the second crossbeams is two, and they are rotatably connected to two ends of the first crossbeam respectively, and the shooting camera is fixed to one end of the second crossbeam away from the first crossbeam.

[0012] Optionally, the base assembly includes a first horizontal moving mechanism, a second horizontal moving mechanism and a rotating mechanism which are sequentially connected in transmission, the motion output end of the rotating mechanism is fixedly connected to the first column, and the rotation axis of the motion output end of the rotating mechanism is in the vertical direction, the first horizontal moving mechanism is used to drive the second horizontal moving mechanism, the rotating mechanism and the column assembly to move in the first direction, the second horizontal moving mechanism is used to drive the rotating mechanism and the column assembly to move in the second direction, the first direction and the second direction are perpendicular to each other and are both horizontal directions; an angle adjustment mechanism is arranged between the column assembly and the beam assembly, and the angle adjustment mechanism is used at least to adjust the pitch angle and roll angle of the beam assembly.

[0013] Optionally, the angle adjustment mechanism includes an angle fixing seat, an angle adjustment seat, a rotating seat rotatably connected to the angle adjustment seat, a pitch adjustment assembly and a roll adjustment assembly both arranged on the angle adjustment seat, and the rotating seat is fixedly connected to the crossbeam assembly; the pitch adjustment assembly includes a first rotating handwheel, a first bevel gear assembly and a first worm gear assembly that are sequentially connected in transmission, and the first worm wheel of the first worm gear assembly is fixedly connected to the rotating seat; the roll adjustment assembly includes a second rotating handwheel, a second bevel gear assembly, a first screw assembly and a rotating connecting rod that are sequentially connected in transmission, one end of the rotating connecting rod is rotatably connected to the linear output end of the first screw assembly, and the other end of the rotating connecting rod is rotatably connected to the angle fixing seat.

[0014] The beneficial effect of the four-wheel alignment device provided by the present invention is that: compared with the prior art, the four-wheel alignment device of the present invention includes a base assembly, a column assembly, a flat panel mounting structure, a crossbeam assembly and a camera, the flat panel mounting structure is used to install a terminal such as a flat panel, freeing the hands of the operator, the column assembly includes a first column, a lifting drive, a transmission wheel and a transmission chain, and the lifting drive can drive the transmission wheel to move up and down, thereby causing the crossbeam assembly connected to the transmission chain to move up and down. In this way, through the lifting and lowering of the transmission wheel, the lifting assembly has a larger moving stroke, and at the same time, the length of the first column is short, which is convenient for production and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A three-dimensional structural diagram of a four-wheel alignment device provided by an embodiment of the present invention;

[0017] Figure 2 A three-dimensional structural diagram of a three-dimensional assembly provided by an embodiment of the present invention;

[0018] Figure 3 A three-dimensional structural diagram of the top of a column assembly provided by an embodiment of the present invention;

[0019] Figure 4 A three-dimensional structural diagram of a mounting frame provided by an embodiment of the present invention;

[0020] Figure 5 The three-dimensional structure of the beam assembly provided by the embodiment of the present invention Figure 1 ;

[0021] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0022] Figure 7 for Figure 5 An exploded structural diagram of the first locking assembly;

[0023] Figure 8 The three-dimensional structure of the beam assembly provided by the embodiment of the present invention Figure 2 ;

[0024] Fig. 9 for Figure 8 A partial enlarged view of point B in the middle;

[0025] Fig.10 for Figure 8 An exploded structural diagram of the second locking assembly;

[0026] Fig.11 A three-dimensional structural diagram of a base assembly provided in an embodiment of the present invention;

[0027] Fig.12 An internal structural diagram of a base assembly provided in an embodiment of the present invention;

[0028] Fig.13 A three-dimensional structural diagram of an angle adjustment mechanism provided in an embodiment of the present invention;

[0029] Fig.14 This is a diagram of the internal structure of the angle adjustment mechanism provided in an embodiment of the present invention.

[0030] Among them, the reference numerals in the figure are:

[0031] 10-base assembly; 11-first horizontal moving mechanism; 12-second horizontal moving mechanism; 13-rotating mechanism; 141-column base; 142-base shell;

[0032] 20-column assembly; 21-first column; 211-limiting part; 22-second column; 221-vertical plate; 2211-first side wall; 2212-second side wall; 2213-slideway; 222-connecting plate; 23-lifting drive member; 24-transmission wheel; 25-transmission chain; 26-mounting frame; 261-first mounting plate; 262-second mounting plate; 263-guide wheel; 2631-slot;

[0033] 30-angle adjustment mechanism; 31-angle fixing seat; 32-angle adjustment seat; 33-pitch adjustment assembly; 331-first rotating hand wheel; 332-first bevel gear assembly; 3321-first bevel gear; 3322-second bevel gear; 333-first worm gear assembly; 3331-first worm; 3332-first worm wheel; 34-roll adjustment assembly; 341-second rotating hand wheel; 342-second bevel gear assembly; 3421-third bevel gear; 3422-fourth bevel gear; 343-first lead screw assembly; 3431-first lead screw; 3432-first nut block; 3433-first slide rail; 344-rotating connecting rod; 351-horizontal rangefinder; 352-altitude rangefinder;

[0034] 40-beam assembly; 41-first beam; 42-second beam; 43-first locking assembly; 431-first lock seat; 4311-first button hole; 432-second lock seat; 4321-second clamping part; 433-hinge shaft; 434-pressing rod; 4341-first clamping part; 4342-first button part; 44-second locking assembly; 441-third lock seat; 4411-lock seat body; 4412-lock seat cover; 4413-second button hole; 442-fourth lock seat; 443-sliding structure; 4431-third clamping part; 4432-second button part; 444-third elastic member; 4421-fourth clamping part; 451-first elastic member; 452-gyroscope;

[0035] 50-shooting camera; 60-plate mounting structure. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] The four-wheel alignment equipment is a tool used to detect and adjust the parameters of the vehicle wheel alignment. It mainly measures parameters such as the castor angle, kingpin inclination angle, front wheel camber angle and toe angle of the wheel. The technician can judge whether the wheel alignment is accurate based on the detected parameters. If it is inaccurate, make corresponding adjustments to ensure the stability and controllability of the vehicle. The camera used to take pictures of the wheels is usually installed on the column, and the height of the camera can be adjusted. However, when the four-wheel alignment equipment also has other detection functions, the adjustment stroke required for the camera is longer, and the column is correspondingly longer. An overly long column is not conducive to production and transportation.

[0041] In order to solve the above technical problems, the present invention proposes a four-wheel alignment device, wherein a camera 50 is installed on a beam assembly 40, and the beam assembly 40 can slide relative to a column assembly 20. Specifically, the column assembly 20 includes a first column 21, a lifting drive 23, a transmission wheel 24 and a transmission chain 25, wherein the lifting drive 23 is used to drive the transmission wheel 24 to move up and down, and one end of the transmission chain 25 is fixed, and the other end is connected to the beam assembly 40, so that when the transmission wheel 24 moves up and down, the beam assembly 40 also moves up and down, and the stroke of the beam assembly 40 is twice the stroke of the transmission wheel 24. In this way, when the first column 21 is set shorter, a larger movement stroke of the beam assembly 40 can still be achieved, which is beneficial to the production and transportation of the column assembly 20. When the four-wheel alignment device only has the four-wheel alignment function, the use of the column assembly 20 can reduce the length of the column assembly 20. When the four-wheel alignment device has the four-wheel alignment function and also has other positioning and detection functions, it can also increase the movement stroke of the beam assembly 40 without increasing the length of the column assembly 20. It should be noted that the “length of the column assembly 20 ” refers to the length of the column assembly 20 when it is contracted, that is, its minimum length.

[0042] The four-wheel alignment device provided by the embodiment of the present invention is now described.

[0043] Please also read Figures 1 to 3 The four-wheel alignment device includes a base assembly 10, a column assembly 20 arranged on the base assembly 10, a flat plate mounting structure 60, a beam assembly 40 slidably arranged on the column assembly 20, and a shooting camera 50 fixed to the beam assembly 40. The column assembly 20 includes a first column 21, a lifting drive member 23 fixedly connected to the first column 21, a transmission wheel 24 driven by the lifting drive member 23 to lift and lower, and a transmission chain 25 wound around the transmission wheel 24. The bottom end of the first column 21 is connected to the base assembly 10, the flat plate mounting structure 60 is fixed to the first column 21, one end of the transmission chain 25 is fixedly arranged, and the other end of the transmission chain 25 is connected to the beam assembly 40.

[0044] The base assembly 10 is generally used to be placed on the ground to support the column assembly 20, so as to facilitate the movement of the four-wheel alignment device and make the four-wheel alignment device more stable when placed.

[0045] The column assembly 20 is arranged on the base assembly 10. The column assembly 20 is generally a vertically arranged long strip structure, which is used to support the beam assembly 40 so that the beam assembly 40 is at a set height. The column assembly 20 includes a first column 21, a lifting drive 23, a transmission wheel 24 and a transmission chain 25. The bottom end of the first column 21 is fixed to the base assembly 10. The lifting drive 23 is a power component that can output linear motion. The transmission wheel 24 can rotate and can move up and down under the action of the lifting drive 23. One end of the transmission chain 25 is fixedly arranged, and the other end of the transmission chain 25 is connected to the beam assembly 40. The transmission chain 25 is wound around the transmission wheel 24. When the transmission wheel 24 moves up and down, it rotates at the same time. Since one end of the transmission chain 25 remains stationary, the other end of the transmission chain 25 (the beam assembly 40) moves with the up and down movement of the transmission wheel 24. In addition, the displacement of the beam assembly 40 in the vertical direction is twice the displacement of the transmission wheel 24 in the vertical direction. Therefore, when the length of the first column 21 is shorter, a larger vertical stroke of the beam assembly 40 can still be achieved without setting the first column 21 longer.

[0046] The crossbeam assembly 40 is slidably disposed on the column assembly 20 , that is, the crossbeam assembly 40 is driven by the transmission chain 25 to move up and down relative to the column assembly 20 .

[0047] The camera 50 has a shooting function. When the four-wheel alignment device is working, a target is also set on the wheel hub. The camera 50 can shoot the target on the wheel hub and judge whether the wheel alignment is accurate based on the shooting data. The camera 50 is fixed on the beam assembly 40. When the beam assembly 40 moves, the camera 50 moves synchronously.

[0048] The flat panel mounting structure 60 is used to mount and fix the flat panel, and the flat panel can be wirelessly connected to the vehicle-mounted system to facilitate real-time adjustment of vehicle parameters during the detection process. The flat panel mounting structure 60 can clamp the flat panel, place the flat panel, support the flat panel, etc. The specific structure of the flat panel mounting structure 60 is not limited here.

[0049] The four-wheel alignment device in the above embodiment includes a base assembly 10, a column assembly 20, a flat panel mounting structure 60, a cross beam assembly 40 and a camera 50. The flat panel mounting structure 60 is used to install a terminal such as a flat panel, freeing the hands of the operator. The column assembly 20 includes a first column 21, a lifting drive 23, a transmission wheel 24 and a transmission chain 25. The lifting drive 23 can drive the transmission wheel 24 to move up and down, thereby making the cross beam assembly 40 connected to the transmission chain 25 move up and down. In this way, through the lifting and lowering of the transmission wheel 24, the lifting assembly has a larger moving stroke. At the same time, the length of the first column 21 is short, which is convenient for production and transportation.

[0050] In some embodiments of the present invention, see Figure 3 The transmission wheel 24 is a sprocket wheel, and the transmission chain 25 is a chain. The chain has strong rigidity and can be applied to a beam assembly 40 of larger mass, and has higher structural strength.

[0051] In some embodiments of the present invention, see Figure 3 The column assembly 20 also includes a second column 22, which is slidably arranged on the first column 21 along the vertical direction. The motion output end of the lifting drive member 23 is fixedly connected to the second column 22, and the transmission wheel 24 is rotatably installed on the second column 22.

[0052] The transmission wheel 24 is rotatably mounted on the second column 22, which can be understood as the axle of the transmission wheel 24 is mounted on the second column 22, the transmission wheel 24 can rotate relative to the second column 22, and the transmission wheel 24 and the second column 22 move synchronously in the vertical direction. When the lifting drive member 23 is working, the second column 22 moves a distance L relative to the first column 21, and accordingly, the transmission wheel 24 moves a distance L relative to the first column 21, the beam assembly 40 moves a distance 2L relative to the first column 21, and the beam assembly 40 moves a distance L relative to the second column 22.

[0053] The second column 22 is provided to provide a mounting position for the transmission wheel 24 , and can also make the vertical movement of the transmission wheel 24 relative to the first column 21 more stable, thereby providing a guide for the lifting movement of the transmission wheel 24 .

[0054] In some embodiments, there are two transmission wheels 24 , which are respectively disposed on opposite sides of the second column 22 . Correspondingly, there are also two transmission chains 25 , and the crossbeam assembly 40 is pulled up and down by the two transmission chains 25 .

[0055] In some embodiments, see Figure 3 The second column 22 is frame-shaped and is sleeved on the outside of the first column 21. The lifting drive member 23 is fixed to the first column 21, and correspondingly, the lifting drive member 23 is also located inside the second column 22. In this way, the internal space of the second column 22 can be fully utilized, making the spatial layout more compact.

[0056] In some embodiments of the present invention, see Figure 3 and Figure 4 The second column 22 includes two spaced-apart vertical plates 221 and a connecting plate 222 connecting the two vertical plates 221. The two vertical plates 221 are respectively arranged on opposite sides of the first column 21. The crossbeam assembly 40 is fixed to the transmission chain 25 through a mounting frame 26. A guide wheel 263 is arranged between the mounting frame 26 and the vertical plates 221.

[0057] The second column 22 includes two vertical plates 221 and a connecting plate 222. The vertical plates 221 are arranged vertically, and the two vertical plates 221 can be connected into a whole through the connecting plate 222. The crossbeam assembly 40 is fixed to the transmission chain 25 through the mounting frame 26, which can be understood as the crossbeam assembly 40 is fixed to the mounting frame 26, and the mounting frame 26 is fixed to one end of the transmission chain 25. A guide wheel 263 is arranged between the mounting frame 26 and the vertical plate 221, and the guide wheel 263 can be arranged on the mounting frame 26 or the vertical plate 221, so that the mounting frame 26 can move stably relative to the vertical plate 221.

[0058] By configuring the second column 22 to include two vertical plates 221 and a connecting plate 222, the two opposite sides of the first column 21 are respectively slidably matched with the two vertical plates 221, thereby improving the stability of the second column 22 when it moves up and down. By configuring a guide wheel 263 between the mounting frame 26 and the vertical plates 221, the stability of the crossbeam assembly 40 when it moves up and down can be improved.

[0059] In some embodiments, the connecting plates 222 are vertically arranged. When the number of the connecting plates 222 is two, the two connecting plates 222 and the two vertical plates 221 can be connected to form a structure with a frame-shaped cross-section.

[0060] In some embodiments, the connecting plate 222 is horizontally disposed, the connecting plate 222 may be disposed on the top of the second column 22 , and the transmission wheel 24 may be installed on the connecting plate 222 .

[0061] In some embodiments, the second column 22 also includes a cover structure, which is covered on the top of the two vertical plates 221. The cover structure can shield the transmission wheel 24 and the transmission chain 25 structure to prevent foreign objects from falling into the transmission wheel 24 and the transmission chain 25, and also has a certain dust-proof effect.

[0062] In some embodiments of the present invention, see Figure 3 and Figure 4 The vertical plate 221 includes a first side wall portion 2211 and a second side wall portion 2212 bent and connected to the first side wall portion 2211. The connection between the first side wall portion 2211 and the second side wall portion 2212 forms an L-shaped limiting angle. The first column 21 extends toward the vertical plate 221 to form a limiting portion 211 that cooperates with the limiting angle. One end of the transmission chain 25 is fixed to the limiting portion 211. The mounting frame 26 includes a first mounting plate 261 and a second side wall portion 2212 connected to the first mounting plate 2 There are two second mounting plates 262 on opposite sides of 61, and the crossbeam assembly 40 is fixed to the first mounting plate 261. Guide wheels 263 are arranged between the first mounting plate 261 and the first side wall portion 2211, and between the second mounting plate 262 and the second side wall portion 2212. The first side wall portion 2211 is provided with a slide groove 2213 extending in the vertical direction, and the radial sides of the guide wheel 263 between the first mounting plate 261 and the first side wall portion 2211 are clamped in the slide groove 2213.

[0063] The bending connection between the first side wall portion 2211 and the second side wall portion 2212 refers to the formation of an angle between the first side wall portion 2211 and the second side wall portion 2212, which can be a right angle, an acute angle, or an obtuse angle. The angle corresponding to the L-shaped limiting angle can be a right angle, an acute angle, or an obtuse angle. The limiting portion 211 extends into the interior of the limiting angle and abuts against the inner wall of the limiting angle (the wall surface of the first side wall portion 2211 and the second side wall portion 2212), thereby forming a guide for the movement of the second column 22. An annular groove 2631 can be provided in the circumference of the guide wheel 263 between the first mounting plate 261 and the first side wall portion 2211. When the guide wheel 263 is located in the slide groove 2213, the opposite sides of the slide groove 2213 abut against two opposite positions (radial sides) of the outer peripheral wall of the groove 2631.

[0064] The cooperation between the limiting angle formed by the vertical plate 221 and the limiting portion 211 on the first column 21 makes the second column 22 more stable when moving up and down. By providing guide wheels 263 between the first mounting plate 261 and the first side wall portion 2211 and between the second mounting plate 262 and the second side wall portion 2212, the vertical movement of the mounting frame 26 relative to the second column 22 is made more stable, and the sliding friction between the mounting frame 26 and the second column 22 is converted into rolling friction, so that the movement of the mounting frame 26 and the crossbeam assembly 40 is smoother.

[0065] In some embodiments, the second side wall portions 2212 are connected to opposite sides of the vertical plate 221, so that the second column 22 has four second side wall portions 2212, and accordingly, the four aforementioned limiting angles are formed. The number of limiting portions 211 is the same as the number of limiting angles, and the number of limiting portions 211 is also four. The four corner positions of the second column 22 are all guided by the limiting portions 211 of the first column 21, so that the up and down movement of the second column 22 can be more stable.

[0066] Optionally, four corners of the top plate of the first column 21 extend to form four limiting portions 211 respectively, corresponding to the four limiting corners one by one.

[0067] In some embodiments, the first mounting plate 261 and the second mounting plate 262 are vertically connected so that the mounting frame 26 is arranged in a U-shaped frame. In this way, the mounting frame 26 is more stably matched with the second column 22, and there are guiding matching structures between the three sides of the second column 22.

[0068] In some embodiments, the guide wheel 263 is mounted on the mounting frame 26, and the guide wheel 263 can rotate relative to the mounting frame 26. Alternatively, the guide wheel 263 is mounted on the second column 22, and the guide wheel 263 can rotate relative to the second column 22.

[0069] In some embodiments, a plurality of guide wheels 263 are disposed between a first mounting plate 261 and the first side wall portion 2211, and a plurality of guide wheels 263 are disposed between the second mounting plate 262 and the second side wall portion 2212. The more guide wheels 263 there are, the more stable the movement of the second column 22 relative to the first column 21 is.

[0070] In some embodiments of the present invention, see Figure 5 The beam assembly 40 includes a first beam 41, a second beam 42 rotatably connected to the first beam 41, a first elastic member 451 connected at both ends to the first beam 41 and the second beam 42 respectively, a first locking assembly 43 and a second locking assembly 44. The beam assembly 40 has a use state and a folded state. The first locking assembly 43 is used to lock the beam assembly 40 in the use state, and the second locking assembly 44 is used to lock the beam assembly 40 in the folded state.

[0071] The second cross beam 42 is rotatably connected to the first cross beam 41. The first cross beam 41 and the second cross beam 42 are arranged in a straight line so that when the cross beam assembly 40 is fully unfolded ( Figure 5The state is called the use state, and when the first crossbeam 41 and the second crossbeam 42 are folded to form an angle or folded to overlap, the state is called the folded state. During the rotation of the second crossbeam 42 relative to the first crossbeam 41, the first elastic member 451 can provide thrust for the rotation of the second crossbeam 42, and can also make the rotation of the second crossbeam 42 smoother and more stable.

[0072] The second crossbeam 42 can rotate relative to the first crossbeam 41, so that the crossbeam assembly 40 can be folded and stored, which is convenient for the production, transportation and storage of the crossbeam assembly 40. Through the arrangement of the first locking assembly 43 and the second locking assembly 44, the crossbeam assembly 40 can be stably maintained in the use state or the folded state.

[0073] In some embodiments, the first elastic member 451 is a gas spring or a hydraulic spring, which provides sufficient auxiliary force for the folding, storage and unfolding of the second cross beam 42 .

[0074] In some embodiments, see Figures 5 to 10 The first locking assembly 43 and the second locking assembly 44 are respectively disposed on opposite sides of the beam assembly 40 to prevent interference between the first locking assembly 43 and the second locking assembly 44. For example, the first locking assembly 43 is disposed on the upper side of the beam assembly 40, and the second locking assembly 44 is disposed on the lower side of the beam assembly 40.

[0075] In some embodiments of the present invention, see Figure 5 A gyroscope 452 is disposed on the first beam 41 , and the gyroscope 452 can detect the placement angle of the beam assembly 40 .

[0076] Optionally, there are two gyroscopes 452 , which are respectively disposed on opposite sides of the column assembly 20 , thereby making the detection of the beam assembly 40 more accurate.

[0077] In some embodiments, see Figures 5 to 7 The first locking assembly 43 includes a first locking seat 431 fixed to the first cross beam 41, a second locking seat 432 fixed to the second cross beam 42, a hinge shaft 433, two pressing rods 434 hinged to each other through the hinge shaft 433, and a second elastic member connected to the two pressing rods 434 at both ends, one end of the pressing rod 434 has a first clamping portion 4341, the second locking seat 432 has a second clamping portion 4321 respectively clamped with the two first clamping portions 4341, and the other end of the pressing rod 434 has a first button portion 4342 for pressing.

[0078] The first lock seat 431 and the second lock seat 432 are fixed to the first cross beam 41 and the second cross beam 42 respectively, the hinge shaft 433 is arranged on the first lock seat 431, and the two pressing rods 434 are hinged to each other through the hinge shaft 433. One end of the pressing rod 434 has a first clamping portion 4341, and the first clamping portion 4341 is used to clamp with the second clamping portion 4321 of the second lock seat 432, and the other end of the pressing rod 434 has a first button portion 4342, and the first button portion 4342 is used for pressing. Specifically, when the cross beam assembly 40 is in use, the first clamping portion 4341 and the second clamping portion 4321 are clamped to each other, so that the second cross beam 42 is located in the length extension direction of the first cross beam 41. When the beam assembly 40 needs to be stored, two fingers press the two first button portions 4342 at the same time to separate the two first clamping portions 4341 from the second clamping portions 4321 , and then rotate the second beam 42 to the folded state of the beam assembly 40 .

[0079] By providing two mutually hinged pressing rods 434, the first clamping portion 4341 on the pressing rod 434 can be clamped to the second clamping portion 4321 of the second lock seat 432, or separated from the second clamping portion 4321, thereby realizing the locking and unlocking of the beam assembly 40 when in use.

[0080] In some embodiments, see Figure 6 and Figure 7 The first lock seat 431 is provided with first button holes 4311 on opposite sides thereof, and the first button parts 4342 are located in the corresponding first button holes 4311, so that the first button parts 4342 are exposed to facilitate pressing by the user. Pressing the two first button parts 4342 at the same time can unlock the beam assembly 40 in use.

[0081] In some embodiments, see Figure 7 The same end of the two pressing rods 434 extends toward each other to form a first hook-shaped clamping portion 4341, and the second lock seat 432 extends toward the first lock seat 431 to form a second clamping portion 4321. The opposite sides of the second clamping portion 4321 are concave to form a slot, and the second clamping portion 4321 is arrow-shaped, so that the two first clamping portions 4341 can be more smoothly inserted into the inside of the slot along the two sides of the clamp head-shaped structure.

[0082] In some embodiments, see Figure 7 The length direction of the hinge shaft 433 is parallel to the vertical direction, and the rotation axis of the pressing rod 434 is also correspondingly in the vertical direction, which will not affect the folding and unfolding of the second crossbeam 42.

[0083] In some embodiments, the second elastic member is a torsion spring, and the second elastic member is sleeved on the hinge shaft 433 , which can provide a pressing force for the clamping of the first clamping portion 4341 and the second clamping portion 4321 .

[0084] In some embodiments of the present invention, see Figures 8 to 10 The second locking assembly 44 includes a third lock seat 441 fixed to the first beam 41, a fourth lock seat 442 fixed to the second beam 42, a sliding structure 443 slidably arranged on the third lock seat 441, and a third elastic member 444 whose two ends are respectively connected to the sliding structure 443 and the third lock seat 441. The third lock seat 441 and the fourth lock seat 442 are hinged to each other, the sliding structure 443 has a third clamping portion 4431 and a second button portion 4432 for pressing, and the fourth lock seat 442 has a fourth clamping portion 4421 clamped with the third clamping portion 4431; when the third clamping portion 4431 and the fourth clamping portion 4421 are clamped, the first beam 41 and the second beam 42 are perpendicular to each other.

[0085] The third lock seat 441 and the fourth lock seat 442 are fixed to the first beam 41 and the second beam 42, respectively, and the sliding structure 443 can slide relative to the third lock seat 441. When the beam assembly 40 is in use, the third clamping portion 4431 and the fourth clamping portion 4421 are separated from each other. When the beam assembly 40 needs to be stored, the first locking assembly 43 is unlocked, and then the second beam 42 is rotated to be perpendicular to the first beam 41, and the third clamping portion 4431 and the fourth clamping portion 4421 are clamped together. When the beam assembly 40 needs to be transformed into a use state, the second button portion 4432 is pressed, the third elastic member 444 is compressed, the third clamping portion 4431 and the fourth clamping portion 4421 are separated from each other, and then the second beam 42 is rotated to transform the beam assembly 40 into a use state, and the first clamping portion 4341 and the second clamping portion 4321 are clamped together.

[0086] By providing a sliding structure 443 that can slide relative to the third locking seat 441, the third clamping portion 4431 and the fourth clamping portion 4421 can be mutually clamped or separated, thereby achieving locking and unlocking of the beam assembly 40 in the folded state.

[0087] In some embodiments, see Fig.10 The third lock seat 441 includes a lock seat body 4411 and a lock seat cover 4412. The third elastic member 444 and the sliding structure 443 are both arranged inside the lock seat body 4411. The lock seat cover 4412 is provided with a second button hole 4413. The second button part 4432 extends into the second button hole 4413, which is convenient for the user to press the second button part 4432.

[0088] In some embodiments, see Fig.10The moving direction of the sliding structure 443 is the vertical direction. When the sliding structure 443 is moved in the vertical direction, the third clamping portion 4431 and the fourth clamping portion 4421 can be mutually engaged or disengaged, and at the same time, the unfolding and folding of the beam assembly 40 are not affected.

[0089] In some embodiments of the present invention, see Figure 5 and Figure 8 There are two second beams 42, which are rotatably connected to the two ends of the first beam 41, and a camera 50 is fixed to one end of the second beam 42 away from the first beam 41. It can be understood that both ends of the beam assembly 40 can be folded, so that the length of the beam assembly 40 is shortened, and the beam assembly 40 is a symmetrical structure, and the force is relatively balanced even in the folded state.

[0090] Optionally, the first cross beam 41 is symmetrically arranged relative to the column assembly 20 , and the two second cross beams 42 are also symmetrically arranged relative to the column assembly 20 , so as to facilitate adjustment of the position and angle of the shooting camera 50 .

[0091] In other embodiments, the number of the second cross beam 42 may also be one, which is disposed at one end of the first cross beam 41 .

[0092] In some embodiments of the present invention, the column assembly 20 can move in a first direction and a second direction relative to the base assembly 10, the first direction and the second direction are both horizontal directions, and the first direction and the second direction are perpendicular to each other. In other words, the column assembly 20 can move in a horizontal direction relative to the base assembly 10 to achieve the front, back, left, and right position adjustment of the column assembly 20. An angle adjustment mechanism 30 is provided between the column assembly 20 and the beam assembly 40, and the angle adjustment mechanism 30 can adjust the pitch angle, roll angle, and yaw angle of the beam assembly 40. In this way, the height position of the beam assembly 40 can be adjusted by the column assembly 20, the front, back, left, and right positions of the beam assembly 40 can be adjusted by the base assembly 10, and the three angles of the beam assembly 40 can be adjusted by the angle adjustment mechanism 30, thereby achieving the six-degree-of-freedom adjustment of the beam assembly 40, so that the beam assembly 40 meets the use requirements.

[0093] The first direction is the X direction, the second direction is the Y direction, the vertical direction is the Z direction, the pitch angle of the beam assembly 40 is understood as the angle between the beam assembly 40 and the X direction, the roll angle of the beam assembly 40 is understood as the angle between the beam assembly 40 and the Y direction, and the yaw angle of the beam assembly 40 is understood as the angle between the beam assembly 40 and the Z direction. It should be noted that the X direction is the front-to-back direction, and the Y direction is the left-to-right direction; or, the X direction is the left-to-right direction, and the Y direction is the front-to-back direction.

[0094] In some embodiments of the present invention, see Fig.11 and Fig.12The base assembly 10 includes a first horizontal moving mechanism 11, a second horizontal moving mechanism 12 and a rotating mechanism 13 which are sequentially connected in transmission. The motion output end of the rotating mechanism 13 is fixedly connected to the first column 21, and the rotation axis of the motion output end of the rotating mechanism 13 is in the vertical direction. The first horizontal moving mechanism 11 is used to drive the second horizontal moving mechanism 12, the rotating mechanism 13 and the column assembly 20 to move in the first direction. The second horizontal moving mechanism 12 is used to drive the rotating mechanism 13 and the column assembly 20 to move in the second direction. The first direction and the second direction are perpendicular to each other and are both horizontal directions. An angle adjustment mechanism 30 is arranged between the column assembly 20 and the beam assembly 40. The angle adjustment mechanism 30 is at least used to adjust the pitch angle and roll angle of the beam assembly 40.

[0095] The first horizontal moving mechanism 11, the second horizontal moving mechanism 12 and the rotating mechanism 13 are connected in transmission, which can be understood as that the motion output end of the first horizontal moving mechanism 11 is connected to the second horizontal moving mechanism 12, and the motion output end of the second horizontal moving mechanism 12 is connected to the rotating mechanism 13. In this way, when the first horizontal moving mechanism 11 is working, the second horizontal moving mechanism 12, the rotating mechanism 13, the column assembly 20 and the beam assembly 40 all move in the first direction, and the motion output end of the first horizontal moving mechanism 11 outputs linear motion, and the first direction is the X direction. When the second horizontal moving mechanism 12 is working, the rotating mechanism 13, the column assembly 20 and the beam assembly 40 all move in the second direction, and the motion output end of the second horizontal moving mechanism 12 outputs linear motion, and the second direction is the Y direction. When the rotating mechanism 13 is working, the motion output end of the rotating mechanism 13 outputs a motion rotating around the vertical direction, so that the column assembly 20 and the beam assembly 40 both rotate around the vertical direction. In this way, the position of the beam assembly 40 in the X direction and the Y direction can be adjusted through the base assembly 10, and the yaw angle of the beam assembly 40 can be adjusted. The position of the beam assembly 40 in the Z direction can be adjusted by the column assembly 20, and the angle adjustment mechanism 30 is used to at least adjust the pitch angle and roll angle of the beam assembly 40. In this way, the six-degree-of-freedom adjustment of the beam assembly 40 is achieved.

[0096] A first horizontal moving mechanism 11, a second horizontal moving mechanism 12 and a rotating mechanism 13 are arranged inside the base assembly 10, so as to realize horizontal position adjustment of the column assembly 20 and the beam assembly 40 and yaw angle adjustment of the beam assembly 40. The angle adjustment mechanism 30 between the column assembly 20 and the beam assembly 40 only needs to adjust the pitch angle and roll angle of the beam assembly 40, so that the structure of the angle adjustment mechanism 30 is simple, which is conducive to the miniaturization of the angle adjustment mechanism 30, does not occupy too much space between the column assembly 20 and the beam assembly 40, and makes full use of the internal space of the base assembly 10.

[0097] In some embodiments, see Fig.12The first horizontal moving mechanism 11 is a second screw assembly, which includes a second motor, a second screw, a second nut block and a second slide rail. The second motor outputs a rotational motion to drive the second screw to rotate. The second nut block is threadedly connected to the second screw, and the second nut block is slidably arranged on the second slide rail. Under the rotation of the second screw, the second nut block slides in the first direction along the second slide rail. The second nut block is the motion output end of the second screw assembly, and the second nut block is fixedly connected to the fixed part (such as a mounting plate or other structure) of the second horizontal moving mechanism 12.

[0098] In some embodiments, the first horizontal moving mechanism 11 is a gear rack assembly, the rack is the motion output end of the first horizontal moving mechanism 11, and the rack is fixedly connected to the fixed part of the second horizontal moving mechanism 12 (such as a mounting plate or other structure).

[0099] In some embodiments, see Fig.12 The second horizontal moving mechanism 12 is a third screw assembly, which includes a third motor, a third screw, a third nut block and a third slide rail. The third motor outputs a rotational motion to drive the third screw to rotate. The third nut block is threadedly connected to the third screw, and the third nut block is slidably arranged on the third slide rail. Under the rotation of the third screw, the third nut block slides in the first direction along the third slide rail. The third nut block is the motion output end of the third screw assembly, and the third nut block is fixedly connected to the fixed part (such as a mounting plate or other structure) of the rotating mechanism 13.

[0100] In some embodiments, the second horizontal moving mechanism 12 is a gear rack assembly, the rack is the motion output end of the second horizontal moving mechanism 12, and the rack is fixedly connected to the fixed part of the rotating mechanism 13 (such as a mounting plate or other structure).

[0101] In some embodiments, see Fig.12 The rotating mechanism 13 includes a rotating motor, a worm and a worm wheel. The worm is fixedly connected to the motion output end of the rotating motor. The worm wheel and the worm are meshed with each other. The rotating motor outputs a rotating motion to rotate the worm. The worm wheel rotates through the cooperation of the worm and the worm wheel. The worm wheel is the motion output end of the rotating mechanism 13. The worm wheel is connected to the column assembly 20, driving the column assembly 20 and the beam assembly 40 to rotate around the vertical direction. The cooperation of the worm wheel and the worm has a large transmission ratio and self-locking characteristics, which can drive the column assembly 20 and the beam assembly 40 to rotate more stably, and can also change the direction of the motion output shaft of the rotating mechanism 13, which is convenient for the internal structural layout of the base assembly 10.

[0102] In some embodiments, the rotating mechanism 13 includes a rotating motor, and a motion output end of the rotating motor is directly connected to the column assembly 20 to drive the column assembly 20 and the beam assembly 40 to rotate around the vertical direction.

[0103] In some embodiments, see Fig.11 and Fig.12 The base assembly 10 further includes a base shell 142 and a column base 141. The column base 141 is fixedly connected to the bottom of the first column 21, and the column base 141 is fixedly connected to the motion output end of the rotating mechanism 13. A movable window is provided at the top of the base shell 142, and the column base 141 shields the movable window. In this way, during the movement of the column assembly 20 relative to the base shell 142, the movable window is always kept in a shielded state to prevent the internal mechanism of the base assembly 10 from being exposed.

[0104] In some embodiments of the present invention, see Fig.13 and Fig.14 The angle adjustment mechanism 30 includes an angle fixing seat 31, an angle adjustment seat 32, a rotating seat rotatably connected to the angle adjustment seat 32, a pitch adjustment component 33 and a roll adjustment component 34, both of which are arranged on the angle adjustment seat 32, and the rotating seat is fixedly connected to the crossbeam component 40; the pitch adjustment component 33 includes a first rotating hand wheel 331, a first bevel gear component 332 and a first worm gear component 333, which are sequentially connected in transmission, and the first worm wheel 3332 of the first worm gear component 333 is fixedly connected to the rotating seat; the roll adjustment component 34 includes a second rotating hand wheel 341, a second bevel gear component 342, a first screw assembly 343 and a rotating connecting rod 344, which are sequentially connected in transmission, one end of the rotating connecting rod 344 is rotatably connected to the linear output end of the first screw assembly 343, and the other end of the rotating connecting rod 344 is rotatably connected to the angle fixing seat 31.

[0105] The angle fixing seat 31 is slidably connected to the column assembly 20, and the angle fixing seat 31 can be fixed on the mounting frame 26. The angle adjustment seat 32 is rotatably connected to the angle fixing seat 31 through the rotating connecting rod 344. Specifically, one end of the rotating connecting rod 344 is rotatably connected to the linear output end of the first screw assembly 343, and the first screw assembly 343 is fixed on the angle adjustment seat 32, and the other end of the rotating connecting rod 344 is rotatably connected to the angle fixing seat 31. When the second rotating hand wheel 341 is rotated, the second bevel gear assembly 342 and the first screw assembly 343 are operated, and the first screw assembly 343 outputs linear motion to the rotating connecting rod 344, so that the rotating connecting rod 344 rotates, thereby pushing the angle adjustment seat 32 to rotate relative to the angle fixing seat 31, and realizing the pitching motion of the beam assembly 40. Among them, the second rotating handwheel 341, the second bevel gear assembly 342, the first screw assembly 343 and the rotating connecting rod 344 are sequentially connected in transmission, which means that the motion output end of the second rotating handwheel 341 is fixedly connected to the motion input end of the second bevel gear assembly 342, the motion output end of the second bevel gear assembly 342 is fixedly connected to the motion input end of the first screw assembly 343, and the motion output end of the first screw assembly 343 is rotationally connected to the rotating connecting rod 344.

[0106] When the first rotating hand wheel 331 is rotated under force, the first bevel gear assembly 332 and the first worm gear assembly 333 work, and the motion output end of the first worm gear assembly 333 is fixedly connected to the rotating seat, so that the rotating seat rotates, thereby driving the beam assembly 40 to rotate, thereby realizing the tilting of the beam assembly 40.

[0107] By rotating the first rotating hand wheel 331, the rotating seat rotates around the Y direction to achieve the roll of the beam assembly 40, and by rotating the second rotating hand wheel 341, the rotating seat rotates around the X direction to achieve the pitch of the beam assembly 40. Moreover, the pitch adjustment assembly 33 and the roll adjustment assembly 34 are both arranged on the angle adjustment seat 32, and the movement direction in the transmission chain 25 is changed by the first bevel gear assembly 332, the second bevel gear assembly 342, and the first worm gear assembly 333, so that the pitch adjustment assembly 33 and the roll adjustment assembly 34 are both flat structures, so that the overall thickness of the angle adjustment assembly is small, the structure is more compact, and the space occupied is smaller.

[0108] In some embodiments, the rotating seat and the angle adjustment seat 32 are connected via a rotating bearing, so that the rotating seat rotates more smoothly and with less resistance relative to the angle adjustment seat 32 .

[0109] In some embodiments, see Fig.14 The first bevel gear assembly 332 includes a first bevel gear 3321 and a second bevel gear 3322 meshing with each other, the first worm gear assembly 333 includes a first worm wheel 3332 and a first worm 3331 meshing with each other, the first rotating hand wheel 331 is coaxially fixedly connected to the first bevel gear 3321, the second bevel gear 3322 is coaxially fixedly connected to the first worm 3331, and the first worm wheel 3332 is fixedly connected to the rotating seat. The rotation axis of the first rotating hand wheel 331 is parallel to the X direction, the rotation axes of the first worm 3331 and the second bevel gear 3322 are parallel to the Z direction, and the rotation axis of the first worm wheel 3332 is parallel to the Y direction, so that the pitch adjustment assembly 33 is flattened.

[0110] In some embodiments, see Fig.14The second bevel gear assembly 342 includes a third bevel gear 3421 and a fourth bevel gear 3422 meshing with each other, the first lead screw assembly 343 includes a first lead screw 3431, a first nut block 3432 and a first slide rail 3433, the first nut block 3432 is threadedly connected to the first lead screw 3431, and the first nut block 3432 is slidably connected to the first slide rail 3433, the second rotating hand wheel 341 is coaxially fixedly connected to the third bevel gear 3421, the fourth bevel gear 3422 is coaxially fixedly connected to the first lead screw 3431, and one end of the rotating connecting rod 344 is rotatably connected to the first nut block 3432. The rotation axis of the second rotating hand wheel 341 is parallel to the X direction, the rotation axes of the first lead screw 3431 and the fourth bevel gear 3422 are parallel to the Z direction, and the moving direction of the first nut block 3432 is the Z direction, so that the roll adjustment assembly 34 is flattened.

[0111] In other embodiments, the first rotating hand wheel 331 in the pitch adjustment assembly 33 may also be replaced by a power component such as an electrically driven motor. The second rotating hand wheel 341 in the roll adjustment assembly 34 may also be replaced by a power component such as an electrically driven motor.

[0112] In some embodiments of the present invention, see Fig.13 The four-wheel alignment device also includes a height rangefinder 352 and a horizontal rangefinder 351. The height rangefinder 352 is used to detect the height position of the beam assembly 40, and the horizontal rangefinder 351 is used to detect the horizontal distance between the beam assembly 40 and the distance measuring target. The horizontal rangefinder 351 can be fixed to the bottom of the angle adjustment seat 32, and the height rangefinder 352 can be fixed to the side of the angle fixing seat 31. The horizontal rangefinder 351 and the height rangefinder 352 can both be laser rangefinders, which emit laser light and reflect after reaching the target object, receive the reflected laser light, and calculate the distance between the laser rangefinder and the target object through the time difference between the laser emission and reception.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A four-wheel alignment device, characterized in that: It includes a base assembly, a column assembly arranged on the base assembly, a flat plate mounting structure, a beam assembly slidably arranged on the column assembly, and a shooting camera fixed to the beam assembly. The column assembly includes a first column, a lifting drive member fixedly connected to the first column, a transmission wheel driven by the lifting drive member for lifting and lowering movement, and a transmission chain wound around the transmission wheel. The bottom end of the first column is connected to the base assembly, the flat plate mounting structure is fixed to the first column, one end of the transmission chain is fixedly arranged, and the other end of the transmission chain is connected to the beam assembly.

2. The four-wheel alignment device according to claim 1, characterized in that: The column assembly also includes a second column, which is slidably arranged on the first column along the vertical direction, the motion output end of the lifting drive member is fixedly connected to the second column, and the transmission wheel is rotatably installed on the second column.

3. The four-wheel alignment device according to claim 2, characterized in that: The second column includes two spaced-apart vertical plates and a connecting plate connecting the two vertical plates, the two vertical plates are respectively arranged on opposite sides of the first column, the crossbeam assembly is fixed to the transmission chain through a mounting frame, and a guide wheel is arranged between the mounting frame and the vertical plates.

4. The four-wheel alignment device according to claim 3, characterized in that: The vertical plate includes a first side wall portion and a second side wall portion bent and connected to the first side wall portion, the connection between the first side wall portion and the second side wall portion forms an L-shaped limit angle, the first column extends toward the vertical plate to form a limit portion that cooperates with the limit angle, and one end of the transmission chain is fixed to the limit portion; the mounting frame includes a first mounting plate and two second mounting plates respectively connected to the opposite sides of the first mounting plate, the crossbeam assembly is fixed to the first mounting plate, the guide wheels are arranged between the first mounting plate and the first side wall portion, and between the second mounting plate and the second side wall portion, the first side wall portion is provided with a slide groove extending in the vertical direction, and the radial sides of the guide wheel between the first mounting plate and the first side wall portion are clamped in the slide groove.

5. The four-wheel alignment device according to claim 1, characterized in that: The beam assembly includes a first beam, a second beam rotatably connected to the first beam, a first elastic member connected at both ends to the first beam and the second beam respectively, a first locking assembly and a second locking assembly. The beam assembly has a use state and a folded state. The first locking assembly is used to lock the beam assembly in the use state, and the second locking assembly is used to lock the beam assembly in the folded state.

6. The four-wheel alignment device according to claim 5, characterized in that: The first locking assembly includes a first lock seat fixed to the first cross beam, a second lock seat fixed to the second cross beam, a hinge shaft, two pressing rods hinged to each other through the hinge shaft, and a second elastic member whose two ends are respectively connected to the two pressing rods, one end of the pressing rod has a first clamping portion, the second lock seat has a second clamping portion respectively clamped with the two first clamping portions, and the other end of the pressing rod has a first button portion for pressing.

7. The four-wheel alignment device according to claim 5, characterized in that: The second locking assembly includes a third lock seat fixed to the first beam, a fourth lock seat fixed to the second beam, a sliding structure slidably arranged on the third lock seat, and a third elastic member whose two ends are respectively connected to the sliding structure and the third lock seat, the third lock seat and the fourth lock seat are hinged to each other, the sliding structure has a third clamping portion and a second button portion for pressing, and the fourth lock seat has a fourth clamping portion clamped with the third clamping portion; when the third clamping portion and the fourth clamping portion are clamped, the first beam and the second beam are perpendicular to each other.

8. The four-wheel alignment device according to claim 5, characterized in that: The number of the second cross beams is two, and they are rotatably connected to the two ends of the first cross beam respectively. The shooting camera is fixed to one end of the second cross beam away from the first cross beam.

9. The four-wheel alignment device according to any one of claims 1 to 8, characterized in that: The base assembly includes a first horizontal moving mechanism, a second horizontal moving mechanism and a rotating mechanism which are sequentially connected in a transmission manner. The motion output end of the rotating mechanism is fixedly connected to the first column, and the rotation axis of the motion output end of the rotating mechanism is in a vertical direction. The first horizontal moving mechanism is used to drive the second horizontal moving mechanism, the rotating mechanism and the column assembly to move in a first direction, and the second horizontal moving mechanism is used to drive the rotating mechanism and the column assembly to move in a second direction. The first direction and the second direction are perpendicular to each other and are both horizontal directions. An angle adjustment mechanism is provided between the column assembly and the beam assembly, and the angle adjustment mechanism is used at least to adjust the pitch angle and roll angle of the beam assembly.

10. The four-wheel alignment device according to claim 9, characterized in that: The angle adjustment mechanism includes an angle fixing seat, an angle adjustment seat, a rotating seat rotatably connected to the angle adjustment seat, a pitch adjustment component and a roll adjustment component both arranged on the angle adjustment seat, the rotating seat being fixedly connected to the crossbeam component; the pitch adjustment component includes a first rotating handwheel, a first bevel gear assembly and a first worm gear assembly which are sequentially connected in transmission, the first worm wheel of the first worm gear assembly being fixedly connected to the rotating seat; the roll adjustment component includes a second rotating handwheel, a second bevel gear assembly, a first screw assembly and a rotating connecting rod which are sequentially connected in transmission, one end of the rotating connecting rod is rotatably connected to the linear output end of the first screw assembly, and the other end of the rotating connecting rod is rotatably connected to the angle fixing seat.

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