A negative clearance quick detection system and detection method of hub unit

Abstract

The present invention discloses a negative clearance rapid detection system and detection method of a hub unit, and the present invention relates to the technical field of negative clearance detection of hubs, including a detection device, a central processing unit and a display terminal, wherein the output end of the detection device is electrically connected to the input end of the central processing unit, the output end of the central processing unit is electrically connected to the input end of the display terminal, the output end of the display terminal is electrically connected to the input end of the detection device, and the detection device internally includes a camera module and a laser point cloud scanning module, the output ends of the camera module and the laser point cloud scanning module are both electrically connected to the input end of the control module, and the output end of the control module is electrically connected to the input end of the image extraction module and the laser point cloud receiving module, respectively. The detection system and the detection method thereof can effectively make the test data more accurate, effectively reduce the errors that occur during the test process, and thus achieve a better detection effect.

Description

Technical Field

[0001] The invention relates to the technical field of wheel hub negative clearance detection, and in particular to a negative clearance rapid detection system and a detection method of a wheel hub unit. Background Art

[0002] The wheel hub is the rotating part of the wheel core connected to the inner profile of the tire through the column, that is, the metal component mounted on the axis in the center of the tire that supports the tire. It is also called the rim, steel ring, wheel, and tire bell. There are many types of wheel hubs depending on the diameter, width, molding method, and material. Bearings generally have a positive gap, or clearance, but when in use, if this clearance is not eliminated, it will seriously affect the movement accuracy of the transmission system and the life of the bearing. Therefore, under normal circumstances, this clearance must be completely eliminated during the working process of the bearing.

[0003] During the detection of negative clearance of the wheel hub, there is no good scanning detection system inside, which leads to large errors between the data during the detection process. In serious cases, it will cause data confusion. When external operators conduct detection and processing, the deviation of the data will cause errors in the operator's later data, which will seriously affect the movement accuracy of the transmission system during the use of the wheel hub. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a negative clearance rapid detection system and detection method for a wheel hub unit, which solves the problem that there is no good internal scanning detection system, resulting in large errors between data during the detection process. In severe cases, it may also cause data confusion. When external operators perform detection and processing on the wheel hub, the deviation in the data will cause errors in the operator's later data, resulting in the problem that the wheel hub seriously affects the motion accuracy of the transmission system during use.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A negative clearance rapid detection system for a hub unit, comprising a detection device, a central processing unit and a display terminal, wherein the output end of the detection device is electrically connected to the input end of the central processing unit, the output end of the central processing unit is electrically connected to the input end of the display terminal, and the output end of the display terminal is electrically connected to the input end of the detection device;

[0006] The detection device includes a camera module and a laser point cloud scanning module. The output ends of the camera module and the laser point cloud scanning module are electrically connected to the input end of the control module. The output end of the control module is electrically connected to the input ends of the image extraction module and the laser point cloud receiving module, respectively. The output ends of the image extraction module and the laser point cloud receiving module are electrically connected to the input end of the overlapping module. The output end of the overlapping module is electrically connected to the input ends of the digital modeling module and the adjustment processing module, respectively. The output ends of the digital modeling module and the adjustment processing module are electrically connected to the input end of the data comparison module. The data comparison module and the data storage module are bidirectionally connected. The output end of the data comparison module is electrically connected to the input end of the data marking module, and the output end of the data marking module is electrically connected to the input end of the data output module.

[0007] Preferably, the adjustment processing module includes a laser point cloud coordinate system establishing unit, the output end of the laser point cloud coordinate system establishing unit is electrically connected to the input end of the laser point coordinate system comparison unit, the laser point coordinate system comparison unit is bidirectionally connected to the threshold setting unit, and the output end of the laser point coordinate system comparison unit is electrically connected to the input end of the laser point coordinate system one unit.

[0008] Preferably, the overlapping module includes an image projection unit and a laser cloud projection unit, the output ends of the image projection unit and the laser cloud projection unit are electrically connected to the input end of the projection overlapping unit, and the output end of the projection overlapping unit is electrically connected to the input end of the projection output unit.

[0009] Preferably, the central processing unit includes a data receiving module, the output end of the data receiving module is electrically connected to the input end of the data processing module, the data processing module is bidirectionally connected to the database, the output end of the data processing module is electrically connected to the input end of the threshold module, the output end of the threshold module is electrically connected to the input end of the mark value output module, the output end of the threshold module is electrically connected to the input end of the data arrangement module, the output end of the data arrangement module is electrically connected to the input end of the data integration module, the output end of the data integration module is electrically connected to the input end of the display terminal, and the input end of the data receiving module is electrically connected to the output end of the data output module.

[0010] Preferably, the data processing module internally includes a projection value extraction unit, a mark value extraction unit and a light spot value extraction unit, the output end of the mark value extraction unit is electrically connected to the input end of the mark value comparison unit, and the mark value comparison unit is bidirectionally connected to the database.

[0011] Preferably, the data arrangement module includes a light spot value confirmation unit and a projection value confirmation unit, and N light spot value confirmation units and N projection value confirmation units are provided.

[0012] Preferably, a slide groove is provided near the upper end of the detection device, a servo motor is fixedly installed at the middle position of one side of the outer surface of the detection device, a rotating rod is fixedly installed at the output end of the servo motor, clamping circular plates are slidably connected at both sides of the upper end of the detection device, a sliding block is slidably connected between the clamping circular plate and the slide groove, limiting grooves are provided on both sides of the inner wall of the clamping circular plate, a semicircular resistance piece is movably connected inside the clamping circular plate, a limiting movable rod is slidably connected between the semicircular resistance piece and the limiting groove, and a resistance spring is fixedly connected between the semicircular resistance piece and the clamping circular plate.

[0013] Preferably, a slot for the rotating rod to move is provided inside the slider, and positive threads and reverse threads are provided on both sides of the annular outer surface of the rotating rod respectively, and patterns corresponding to the positive threads and reverse threads are provided inside the slot, the rotating rod is threadedly connected to the slider, and a rotating shaft is rotatably connected between the limiting movable rod and the semicircular contact piece.

[0014] Preferably, a method for quickly detecting negative clearance of a hub unit comprises the following steps:

[0015] Step 1, place the external wheel hub inside the semicircular contact piece. After placement, directly turn on the circuit switch of the servo motor, and the servo motor drives the rotating rod to rotate. When the rotating rod rotates, it effectively drives the clamping circular plate to move closer. During the process of the clamping circular plate moving closer, it drives the semicircular contact piece to clamp and fix the wheel hub;

[0016] Step 2: After the hub is fixed, the camera module and the laser point cloud scanning module start to work, and transmit the data to the image extraction module and the laser point cloud receiving module through the control module. The image projection unit and the laser cloud projection unit in the overlapping module receive and distinguish the data, and perform overlapping processing on the data through the projection overlapping unit, and then transmit the data to the digital modeling module and the adjustment processing module respectively through the projection output unit. The laser point cloud coordinate system establishment unit in the adjustment processing module starts to establish the coordinate system, and the laser point coordinate system comparison unit compares the data with the value in the threshold setting unit. After the comparison is completed, the laser point coordinate system unit performs unified processing on the data.

[0017] Step 3, the laser point coordinate system unit 1 and the digital modeling module respectively transmit the data to the data comparison module, the data comparison module compares the data with the stored data in the data storage module, and marks the data with a large comparison difference through the data marking module, and the data marking module then transmits the data to the central processing unit through the data output module;

[0018] Step 4, the data receiving module inside the central processing unit receives the data, and the data receiving module transmits the data to the data processing module. The projection value extraction unit, the mark value extraction unit and the light point value extraction unit inside the data processing module extract and process the external value, the mark value comparison unit compares the value with the data inside the database, the threshold module is set with a specified value, and the mark value output module outputs the mark value;

[0019] Step 5: The data arrangement module receives the data in the threshold module, confirms and processes multiple groups of different values, and the data integration module integrates the corresponding values. After the integration is completed, it is directly transmitted to the display terminal;

[0020] Step 6: The external operator checks the data inside the display terminal to find the tag value, and then controls the detection device to change the test data inside the detection device.

[0021] Preferably, the internal interval value of the threshold module in step 4 is set by professionals, and N groups are set inside the light point value confirmation unit and the projection value confirmation unit in step 5.

[0022] Beneficial Effects

[0023] The present invention provides a negative clearance rapid detection system and detection method of a hub unit. Compared with the prior art, the system has the following beneficial effects:

[0024] 1. The negative clearance rapid detection system and detection method of the hub unit start working through the camera module and the laser point cloud scanning module, and transmit the data to the image extraction module and the laser point cloud receiving module through the control module. The image projection unit and the laser cloud projection unit in the overlapping module receive and distinguish the data, and overlap the data through the projection overlapping unit, and then transmit the data to the digital modeling module and the adjustment processing module respectively through the projection output unit. The laser point cloud coordinate system establishment unit in the adjustment processing module starts to establish the coordinate system. The laser point coordinate system comparison unit compares the values ​​with the values ​​in the threshold setting unit. After the comparison is completed, it is uniformly processed by the laser point coordinate system unit, which can effectively make the test data more accurate and effectively reduce the errors in the test process, thereby achieving better detection effects.

[0025] 2. The negative clearance rapid detection system and detection method of the hub unit transmits data to the data comparison module through the laser point coordinate system unit and the digital modeling module respectively. The data comparison module compares the data with the stored data in the data storage module, and marks the data with large comparison difference through the data marking module. The data marking module then transmits the data to the central processing unit through the data output module, and then extracts and processes the external numerical value through the marking value extraction unit and the light spot value extraction unit. The marking value comparison unit compares the numerical value with the data in the database. The threshold module is set with a specified numerical value. The marking value output module then outputs the marked numerical value, which can quickly and effectively mark the specified abnormal numerical value and transmit it to the outside, so as to facilitate the operator to observe and process, thereby effectively changing the corresponding error occurring during the test and facilitating the processing operation of external operators.

[0026] 3. The negative clearance rapid detection system and detection method of the hub unit receives the data inside the threshold module through the data arrangement module, confirms and processes multiple groups of different values, and then the data integration module integrates and processes the corresponding values. After the integration is completed, it is directly transmitted to the display terminal, which can effectively integrate the corresponding values ​​and complete the unified transmission, effectively avoiding data confusion. When external personnel view it, it is necessary to reorganize it to facilitate external personnel to view and process the values.

[0027] 4. The negative clearance rapid detection system and detection method of the hub unit are as follows: the external hub is placed inside the semicircular resistance piece, and after the placement is completed, the circuit switch of the servo motor is directly turned on, and the servo motor drives the rotating rod to rotate. When the rotating rod rotates, because the annular outer surface of the rotating rod is provided with positive threads and reverse threads respectively, it can effectively drive the clamping circular plate to move closer. During the process of the clamping circular plate moving closer, the semicircular resistance piece is driven to clamp and fix the hub. A semicircular resistance piece is arranged inside the clamping circular plate, and the semicircular resistance piece resists the hub. During the resistance process, the rotation of the movable rod and the elastic force of the resistance spring are limited, so that the hub can be effectively fixed, which is convenient for external personnel to detect and handle the hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the working principle framework of the present invention;

[0030] Figure 3 It is a schematic diagram of the principle framework of the detection device of the present invention;

[0031] Figure 4This is a schematic diagram of the principle framework of the adjustment processing module of the present invention;

[0032] Figure 5 This is a schematic diagram of the principle framework of the overlapping module of the present invention;

[0033] Figure 6 This is a schematic diagram of the principle framework of the central processing unit of the present invention;

[0034] Figure 7 This is a schematic diagram of the principle framework of the data processing module of the present invention;

[0035] Figure 8 This is a schematic diagram of the principle framework of the data arrangement module of the present invention;

[0036] Fig. 9 For the present invention Figure 1 A magnified schematic diagram of the local structure of area A;

[0037] Fig.10 It is a schematic plan view of the internal structure of the clamping circular plate of the present invention.

[0038] In the figure: 1. detection device; 11. camera module; 12. laser point cloud scanning module; 13. control module; 14. image extraction module; 15. laser point cloud receiving module; 16. overlapping module; 161. image projection unit; 162. laser cloud projection unit; 163. projection overlapping unit; 164. projection output unit; 17. digital modeling module; 18. adjustment processing module; 181. laser point cloud coordinate system establishment unit; 182. laser point coordinate system comparison unit; 183. laser point coordinate system one unit; 184. threshold setting unit; 19. data comparison module; 110. data storage module; 111. data marking module; 11 2. Data output module; 2. Central processing unit; 21. Data receiving module; 22. Data processing module; 221. Projection value extraction unit; 222. Marking value extraction unit; 223. Light point value extraction unit; 224. Marking value comparison unit; 23. Threshold value module; 24. Database; 25. Data arrangement module; 251. Light point value confirmation unit; 252. Projection value confirmation unit; 26. Data integration module; 27. Marking value output module; 3. Display terminal; 4. Servo motor; 5. Slide; 6. Clamping circular plate; 61. Limiting groove; 62. Limiting movable rod; 7. Semicircular contact piece; 8. Rotating rod; 9. Sliding block; 10. Contact spring. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-3 The present invention provides a technical solution: a negative clearance rapid detection system of a hub unit, comprising a detection device 1, a central processor 2 and a display terminal 3, wherein the output end of the detection device 1 is electrically connected to the input end of the central processor 2, the output end of the central processor 2 is electrically connected to the input end of the display terminal 3, and the output end of the display terminal 3 is electrically connected to the input end of the detection device 1;

[0041] The detection device 1 includes a camera module 11 and a laser point cloud scanning module 12. The output ends of the camera module 11 and the laser point cloud scanning module 12 are electrically connected to the input end of the control module 13. The output end of the control module 13 is electrically connected to the input ends of the image extraction module 14 and the laser point cloud receiving module 15 respectively. The output ends of the image extraction module 14 and the laser point cloud receiving module 15 are electrically connected to the input end of the overlapping module 16. The output end of the overlapping module 16 is electrically connected to the input ends of the digital modeling module 17 and the adjustment processing module 18 respectively. The output ends of the digital modeling module 17 and the adjustment processing module 18 are electrically connected to the input end of the data comparison module 19. The data comparison module 19 and the data storage module 110 are bidirectionally connected. The output end of the data comparison module 19 is electrically connected to the input end of the data marking module 111, and the output end of the data marking module 111 is electrically connected to the input end of the data output module 112.

[0042] See also Figure 4 The adjustment processing module 18 includes a laser point cloud coordinate system establishing unit 181, the output end of the laser point cloud coordinate system establishing unit 181 is electrically connected to the input end of the laser point coordinate system comparing unit 182, the laser point coordinate system comparing unit 182 is bidirectionally connected to the threshold setting unit 184, and the output end of the laser point coordinate system comparing unit 182 is electrically connected to the input end of the laser point coordinate system one unit 183.

[0043] See also Figure 5 The overlapping module 16 includes an image projection unit 161 and a laser cloud projection unit 162. The output ends of the image projection unit 161 and the laser cloud projection unit 162 are electrically connected to the input end of the projection overlapping unit 163. The output end of the projection overlapping unit 163 is electrically connected to the input end of the projection output unit 164.

[0044] See also Figure 6The central processing unit 2 includes a data receiving module 21, the output end of the data receiving module 21 is electrically connected to the input end of the data processing module 22, the data processing module 22 is bidirectionally connected to the database 24, the output end of the data processing module 22 is electrically connected to the input end of the threshold module 23, the output end of the threshold module 23 is electrically connected to the input end of the mark value output module 27, the output end of the threshold module 23 is electrically connected to the input end of the data arrangement module 25, the output end of the data arrangement module 25 is electrically connected to the input end of the data integration module 26, the output end of the data integration module 26 is electrically connected to the input end of the display terminal 3, and the input end of the data receiving module 21 is electrically connected to the output end of the data output module 112.

[0045] See also Figure 7 The data processing module 22 includes a projection value extraction unit 221, a mark value extraction unit 222 and a light point value extraction unit 223. The output end of the mark value extraction unit 222 is electrically connected to the input end of the mark value comparison unit 224, and the mark value comparison unit 224 is bidirectionally connected to the database 24.

[0046] See also Figure 8 The data arrangement module 25 includes a light spot value confirmation unit 251 and a projection value confirmation unit 252, and both the light spot value confirmation unit 251 and the projection value confirmation unit 252 are provided in N numbers.

[0047] See also Figure 1 and Fig. 9 A slide groove 5 is provided near the upper end of the detection device 1, a servo motor 4 is fixedly installed at the middle position of one side of the outer surface of the detection device 1, and a rotating rod 8 is fixedly installed at the output end of the servo motor 4. Clamping circular plates 6 are slidably connected to both sides of the upper end of the detection device 1, and a slider 9 is slidably connected between the clamping circular plate 6 and the slide groove 5. Limiting grooves 61 are provided on both sides of the inner wall of the clamping circular plate 6, a semicircular resistance piece 7 is movably connected inside the clamping circular plate 6, a limiting movable rod 62 is slidably connected between the semicircular resistance piece 7 and the limiting groove 61, and a resistance spring 10 is fixedly connected between the semicircular resistance piece 7 and the clamping circular plate 6.

[0048] See also Fig.10 A slot is provided inside the slider 9 for the rotating rod 8 to move. Both sides of the annular outer surface of the rotating rod 8 are provided with positive threads and reverse threads respectively. The slot is provided with patterns corresponding to the positive threads and reverse threads. The rotating rod 8 and the slider 9 are threadedly connected, and a rotating shaft is provided between the limiting movable rod 62 and the semicircular contact piece 7 for rotation.

[0049] Furthermore, a method for quickly detecting negative clearance of a hub unit comprises the following steps:

[0050] Step 1, place the external wheel hub inside the semicircular contact piece 7. After the placement is completed, directly turn on the circuit switch of the servo motor 4, and the servo motor 4 drives the rotating rod 8 to rotate. When the rotating rod 8 rotates, it effectively drives the clamping circular plate 6 to move closer. During the process of the clamping circular plate 6 moving closer, it drives the semicircular contact piece 7 to clamp and fix the wheel hub;

[0051] Step 2, after completing the fixing work of the wheel hub, the camera module 11 and the laser point cloud scanning module 12 start to work, and transmit the data to the image extraction module 14 and the laser point cloud receiving module 15 through the control module 13, the image projection unit 161 and the laser cloud projection unit 162 in the overlapping module 16 receive and distinguish the data, and overlap the data through the projection overlapping unit 163, and then transmit the data to the digital modeling module 17 and the adjustment processing module 18 respectively through the projection output unit 164, the laser point cloud coordinate system establishment unit 181 in the adjustment processing module 18 starts to establish the coordinate system, the laser point coordinate system comparison unit 182 compares the data with the value in the threshold setting unit 184, and after the comparison is completed, it is uniformly processed by the laser point coordinate system one unit 183;

[0052] Step 3, the laser point coordinate system unit 183 and the digital modeling module 17 respectively transmit the data to the data comparison module 19, the data comparison module 19 compares the data with the stored data in the data storage module 110, and marks the data with a large comparison difference through the data marking module 111, and the data marking module 111 then transmits the data to the central processing unit 2 through the data output module 112;

[0053] Step 4, the data receiving module 21 inside the central processor 2 receives the data, and the data receiving module 21 transmits the data to the data processing module 22. The projection value extraction unit 221, the mark value extraction unit 222 and the light point value extraction unit 223 inside the data processing module 22 extract and process the external value, the mark value comparison unit 224 compares the value with the data inside the database 24, the threshold module 23 is set with a specified value, and the mark value output module 27 outputs the mark value;

[0054] Step 5: The data arrangement module 25 receives the data in the threshold module 23, confirms the multiple sets of different values, and the data integration module 26 integrates the corresponding values. After the integration is completed, it is directly transmitted to the display terminal 3;

[0055] Step 6: The external operator checks the data inside the display terminal 3 to find the tag value, and then controls the detection device 1 to change the test data inside the detection device 1.

[0056] In another step, the internal interval value of the threshold module 23 in step 4 is set by professionals, and N groups are set inside the light point value confirmation unit 251 and the projection value confirmation unit 252 in step 5.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A negative clearance rapid detection system for a hub unit, comprising a detection device (1), a central processing unit (2) and a display terminal (3), characterized in that: The output end of the detection device (1) is electrically connected to the input end of the central processing unit (2), the output end of the central processing unit (2) is electrically connected to the input end of the display terminal (3), and the output end of the display terminal (3) is electrically connected to the input end of the detection device (1); The detection device (1) includes a camera module (11) and a laser point cloud scanning module (12) therein; the output ends of the camera module (11) and the laser point cloud scanning module (12) are both electrically connected to the input end of a control module (13); the output end of the control module (13) is respectively electrically connected to the input end of an image extraction module (14) and a laser point cloud receiving module (15); the output ends of the image extraction module (14) and the laser point cloud receiving module (15) are electrically connected to the input end of an overlapping module (16); and the overlapping module (16) The output end is electrically connected to the input end of the digital modeling module (17) and the adjustment processing module (18), respectively; the output ends of the digital modeling module (17) and the adjustment processing module (18) are both electrically connected to the input end of the data comparison module (19); the data comparison module (19) and the data storage module (110) are bidirectionally connected; the output end of the data comparison module (19) is electrically connected to the input end of the data marking module (111); and the output end of the data marking module (111) is electrically connected to the input end of the data output module (112); The adjustment processing module (18) includes a laser point cloud coordinate system establishing unit (181) inside, the output end of the laser point cloud coordinate system establishing unit (181) is electrically connected to the input end of the laser point coordinate system comparing unit (182), the laser point coordinate system comparing unit (182) is bidirectionally connected to the threshold setting unit (184), and the output end of the laser point coordinate system comparing unit (182) is electrically connected to the input end of the laser point coordinate system one unit (183); The overlapping module (16) comprises an image projection unit (161) and a laser cloud projection unit (162) therein; the output ends of the image projection unit (161) and the laser cloud projection unit (162) are electrically connected to the input end of the projection overlapping unit (163); and the output end of the projection overlapping unit (163) is electrically connected to the input end of the projection output unit (164); The central processing unit (2) includes a data receiving module (21) inside, the output end of the data receiving module (21) is electrically connected to the input end of the data processing module (22), the data processing module (22) is bidirectionally connected to the database (24), the output end of the data processing module (22) is electrically connected to the input end of the threshold module (23), the output end of the threshold module (23) is electrically connected to the input end of the mark value output module (27), the output end of the threshold module (23) is electrically connected to the input end of the data arrangement module (25), the output end of the data arrangement module (25) is electrically connected to the input end of the data integration module (26), the output end of the data integration module (26) is electrically connected to the input end of the display terminal (3), and the input end of the data receiving module (21) is electrically connected to the output end of the data output module (112); The data processing module (22) comprises a projection value extraction unit (221), a mark value extraction unit (222) and a light point value extraction unit (223); an output end of the mark value extraction unit (222) is electrically connected to an input end of a mark value comparison unit (224); and the mark value comparison unit (224) is bidirectionally connected to a database (24); A slide groove (5) is provided near the upper end of the detection device (1), a servo motor (4) is fixedly installed at the middle position of one side of the outer surface of the detection device (1), a rotating rod (8) is fixedly installed at the output end of the servo motor (4), a clamping circular plate (6) is slidably connected at both sides of the upper end of the detection device (1), a slider (9) is slidably connected between the clamping circular plate (6) and the slide groove (5), limiting grooves (61) are provided on both sides of the inner wall of the clamping circular plate (6), a semicircular resistance piece (7) is movably connected inside the clamping circular plate (6), a limiting movable rod (62) is slidably connected between the semicircular resistance piece (7) and the limiting groove (61), and a resistance spring (10) is fixedly connected between the semicircular resistance piece (7) and the clamping circular plate (6); The detection method of the negative clearance rapid detection system of the hub unit comprises the following steps: Step 1, place the external wheel hub inside the semicircular abutment sheet (7), and after the placement is completed, directly turn on the circuit switch of the servo motor (4), and the servo motor (4) drives the rotating rod (8) to rotate. When the rotating rod (8) rotates, it effectively drives the clamping circular plate (6) to move closer, and when the clamping circular plate (6) moves closer, it drives the semicircular abutment sheet (7) to clamp and fix the wheel hub; Step 2: After the hub is fixed, the camera module (11) and the laser point cloud scanning module (12) start to work, and transmit the data to the image extraction module (14) and the laser point cloud receiving module (15) through the control module (13); the image projection unit (161) and the laser cloud projection unit (162) in the overlapping module (16) receive and distinguish the data, and perform overlapping processing on the data through the projection overlapping unit (163); and then transmit the data to the digital modeling module (17) and the adjustment processing module (18) respectively through the projection output unit (164); the laser point cloud coordinate system establishment unit (181) in the adjustment processing module (18) starts to establish a coordinate system, and the laser point coordinate system comparison unit (182) performs comparison processing with the value in the threshold setting unit (184); after the comparison is completed, it is uniformly processed by the laser point coordinate system first unit (183); Step 3, the laser point coordinate system unit 1 (183) and the digital modeling module (17) respectively transmit the data to the data comparison module (19), the data comparison module (19) compares the data with the stored data in the data storage module (110), and marks the data with a larger comparison difference through the data marking module (111), and the data marking module (111) then transmits the data to the central processing unit (2) through the data output module (112); Step 4: The data receiving module (21) inside the central processing unit (2) receives the data, and the data receiving module (21) transmits the data to the data processing module (22). The projection value extraction unit (221), the mark value extraction unit (222) and the light point value extraction unit (223) inside the data processing module (22) extract and process the external numerical value, and the mark value comparison unit (224) compares and processes the numerical value with the data inside the database (24). The threshold module (23) is provided with a specified numerical value, and the mark value output module (27) outputs the mark value. Step 5: The data arrangement module (25) receives the data in the threshold module (23), confirms the multiple sets of different values, and the data integration module (26) integrates the corresponding values. After the integration is completed, it is directly transmitted to the display terminal (3); Step 6: The external operator checks the data inside the display terminal (3) to find the tag value, and then controls the detection device (1) to change the test data inside the detection device (1).

2. A negative clearance rapid detection system for a hub unit according to claim 1, characterized in that: The data arrangement module (25) comprises a light point value confirmation unit (251) and a projection value confirmation unit (252) therein, and N light point value confirmation units (251) and N projection value confirmation units (252) are provided.

3. The negative clearance rapid detection system of a hub unit according to claim 1, characterized in that: The slider (9) is provided with a slot for the rotating rod (8) to move, and the rotating rod (8) is provided with positive threads and reverse threads on both sides of the annular outer surface, and patterns corresponding to the positive threads and reverse threads are provided inside the slot. The rotating rod (8) and the slider (9) are threadedly connected, and a rotating shaft is rotatably connected between the limiting movable rod (62) and the semicircular contact piece (7).

4. The negative clearance rapid detection system of a hub unit according to claim 2, characterized in that: The internal interval value of the threshold module (23) is set by professionals, and N groups are arranged inside the light point value confirmation unit (251) and the projection value confirmation unit (252).

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