阅读说明：本技术 一种轮毂单元的负游隙快速检测系统及其检测方法 (Rapid detection system and detection method for negative clearance of hub unit ) 是由 李小群 朱文辉 郁炯 于 2020-08-21 设计创作，主要内容包括：本发明公开了一种轮毂单元的负游隙快速检测系统及其检测方法,本发明涉及轮毂负游隙检测技术领域,包括检测装置、中央处理器以及显示终端,所述检测装置输出端与中央处理器输入端电性连接,所述中央处理器输出端与显示终端输入端电性连接,所述显示终端输出端与检测装置输入端电性连接,所述检测装置内部包括有摄像模块和激光点云扫描模块,所述摄像模块和激光点云扫描模块输出端均与控制模块输入端电性连接,所述控制模块输出端分别与影像提取模块和激光点云接收模块输入端电性连接。该检测系统及其检测方法能够有效的使测试数据更加准确,有效降低了测试过程中,出现的误差,从而达到较好的检测效果。(The invention discloses a system and a method for rapidly detecting a negative clearance of a hub unit, and relates to the technical field of detection of the negative clearance of a hub. The detection system and the detection method thereof can effectively enable the test data to be more accurate, and effectively reduce errors in the test process, thereby achieving better detection effect.)

1. The utility model provides a quick detecting system of negative play of hub unit, includes detection device (1), central processing unit (2) and display terminal (3), its characterized in that: the output end of the detection device (1) is electrically connected with the input end of the central processing unit (2), the output end of the central processing unit (2) is electrically connected with the input end of the display terminal (3), and the output end of the display terminal (3) is electrically connected with the input end of the detection device (1);

the detection device (1) comprises a camera module (11) and a laser point cloud scanning module (12) inside, the output ends of the camera module (11) and the laser point cloud scanning module (12) are electrically connected with the input end of a control module (13), the output end of the control module (13) is electrically connected with the input ends of an image extraction module (14) and a 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 with the input end of an overlapping module (16), the output end of the overlapping module (16) is electrically connected with the input ends of a digital modeling module (17) and an adjusting processing module (18) respectively, the output ends of the digital modeling module (17) and the adjusting processing module (18) are electrically connected with the input end of a data comparison module (19), and the data comparison module (19) and a data storage module (110) are connected in a bidirectional mode, the output end of the data comparison module (19) is electrically connected with the input end of the data marking module (111), and the output end of the data marking module (111) is electrically connected with the input end of the data output module (112).

2. A system for rapid detection of negative play of a hub unit according to claim 1, characterized in that: the adjusting and processing module (18) comprises 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 with the input end of a laser point coordinate system comparing unit (182), the laser point coordinate system comparing unit (182) is in bidirectional connection with a threshold setting unit (184), and the output end of the laser point coordinate system comparing unit (182) is electrically connected with the input end of a laser point coordinate system unit (183).

3. A system for rapid detection of negative play of a hub unit according to claim 1, characterized in that: the overlapping module (16) comprises an image projection unit (161) and a laser cloud projection unit (162) inside, the output ends of the image projection unit (161) and the laser cloud projection unit (162) are electrically connected with the input end of a projection overlapping unit (163), and the output end of the projection overlapping unit (163) is electrically connected with the input end of a projection output unit (164).

4. A system for rapid detection of negative play of a hub unit according to claim 1, characterized in that: the central processing unit (2) comprises a data receiving module (21) inside, the output end of the data receiving module (21) is electrically connected with the input end of a data processing module (22), the data processing module (22) is in bidirectional connection with the database (24), the output end of the data processing module (22) is electrically connected with the input end of the threshold module (23), the output end of the threshold module (23) is electrically connected with the input end of the marking value output module (27), the output end of the threshold module (23) is electrically connected with the input end of the data arrangement module (25), the output end of the data arrangement module (25) is electrically connected with the input end of the data integration module (26), the output end of the data integration module (26) is electrically connected with the input end of the display terminal (3), the input end of the data receiving module (21) is electrically connected with the output end of the data output module (112).

5. A system for rapid detection of negative play of a hub unit according to claim 4, characterized in that: the data processing module (22) comprises a projection value extraction unit (221), a mark value extraction unit (222) and a light spot value extraction unit (223) inside, the output end of the mark value extraction unit (222) is electrically connected with the input end of the mark value comparison unit (224), and the mark value comparison unit (224) is connected with the database (24) in a bidirectional mode.

6. A system for rapid detection of negative play of a hub unit according to claim 4, characterized in that: the data arrangement module (25) comprises a light point value confirmation unit (251) and a projection value confirmation unit (252) inside, and N light point value confirmation units (251) and N projection value confirmation units (252) are arranged.

7. A system for rapid detection of negative play of a hub unit according to claim 1, characterized in that: a sliding groove (5) is arranged in the detection device (1) and close to the upper end, a servo motor (4) is fixedly arranged at the middle position of one side of the outer surface of the detection device (1), a rotating rod (8) is fixedly arranged at the output end of the servo motor (4), clamping circular plates (6) are slidably connected at the two sides of the upper end in the detection device (1), a slide block (9) is connected between the clamping circular plate (6) and the sliding chute (5) in a sliding way, both sides of the inner wall of the clamping circular plate (6) are provided with limiting grooves (61), a semicircular contact piece (7) is movably connected inside the clamping circular plate (6), a limiting movable rod (62) is connected between the semicircular contact piece (7) and the limiting groove (61) in a sliding way, an abutting spring (10) is fixedly connected between the semicircular abutting piece (7) and the clamping circular plate (6).

8. The system for rapidly detecting negative backlash of a hub unit according to claim 7, wherein: slider (9) inside offer the notch that supplies dwang (8) activity, positive screw thread and contrary screw thread have been seted up respectively to dwang (8) annular surface both sides, and the notch is inside to be seted up with positive screw thread and the corresponding line seal of contrary screw thread, threaded connection between dwang (8) and slider (9), it is connected with the pivot to inject movable rod (62) and semicircle to rotate between contact (7).

9. A system for rapid detection of negative play of a hub unit according to claims 1-8, the detection method comprising the steps of:

step 1, an external hub is placed inside a semicircular contact piece (7), after the placement is finished, a circuit switch of a servo motor (4) is directly turned on, the servo motor (4) drives a rotating rod (8) to rotate, when the rotating rod (8) rotates, a clamping circular plate (6) is effectively driven to move close together, and the semicircular contact piece (7) is driven to clamp and fix the hub in the closing movement process of the clamping circular plate (6);

step 2, after the hub is fixed, the camera module (11) and the laser point cloud scanning module (12) start to work, and data are transmitted 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 point cloud projection unit (162) in the overlapping module (16) receive and distinguish the data, the data are overlapped through the projection overlapping unit (163), and then are respectively transmitted to the digital modeling module (17) and the adjustment processing module (18) through the projection output unit (164), the laser point cloud coordinate system establishing unit (181) in the adjustment processing module (18) starts to establish a coordinate system, the laser point coordinate system comparison unit (182) performs comparison processing through the numerical value in the threshold setting unit (184), and after the comparison is completed, then, the laser spot coordinate system unit (183) is used for carrying out unified processing on the laser spot coordinate system unit;

step 3, the laser point coordinate system unit (183) and the digital modeling module (17) respectively transmit data to the interior of the data comparison module (19), the data comparison module (19) compares the data with the stored data in the data storage module (110), the data with larger comparison difference is marked by the data marking module (111), and the data marking module (111) transmits the data to the interior of the central processing unit (2) through the data output module (112);

step 4, a data receiving module (21) in the central processing unit (2) receives data, the data receiving module (21) transmits the data to the inside of a data processing module (22), a projection value extracting unit (221), a mark value extracting unit (222) and a light spot value extracting unit (223) in the data processing module (22) extract external numerical values, a mark value comparing unit (224) compares the numerical values with the data in the database (24), a specified numerical value is arranged in a threshold module (23), and a mark value output module (27) outputs the mark numerical values;

step 5, the data arrangement module (25) receives the data in the threshold module (23), confirms multiple groups of different numerical values, the data integration module (26) integrates the corresponding numerical values, and the integrated numerical values are directly conveyed to the inside of the display terminal (3);

and 6, an external operator looks up the data in the display terminal (3) to find a mark value, and then controls the detection device (1) to change the test data in the detection device (1).

10. The method for quickly detecting a negative backlash of a hub unit according to claim 9, wherein: in the step 4, the internal interval value of the threshold module (23) is set by a professional, and in the step 5, N groups of light point value confirmation units (251) and projection value confirmation units (252) are arranged inside.

Technical Field

The invention relates to the technical field of wheel hub negative clearance detection, in particular to a system and a method for rapidly detecting a negative clearance of a wheel hub unit.

Background

The hub is a wheel core rotating part connected by a tire inner profile steel through an upright post, namely a metal part supporting the center of the tire and arranged on a shaft, namely a rim, a steel ring, a wheel and a tire bell, the hub has various types according to the diameter, the width, the forming mode and the material, and a bearing generally has a positive clearance or a play.

In the wheel hub burden play testing process, because of inside not having better scanning detecting system, lead to in the testing process, the error between the data is great, and in the time of serious, still can lead to data to take place the confusion, when outside operating personnel detected it and handled, because of the deviation of data, the data that just leads to the operating personnel later stage appeared the error, lead to wheel hub in the use, seriously influence the motion precision in the transmission system.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a quick detection system and a detection method for a negative clearance of a hub unit, which solve the problems that the error between data is large in the detection process due to the fact that a better scanning detection system is not arranged inside, the data is disordered when the error is serious, and the motion precision in a transmission system is seriously influenced when the error occurs to the data in the later period of an operator due to the deviation of the data when an external operator detects and processes the data.

In order to achieve the purpose, the invention is realized by the following technical scheme: a quick detection system for negative play of a hub unit comprises a detection device, a central processing unit and a display terminal, wherein the output end of the detection device is electrically connected with the input end of the central processing unit, the output end of the central processing unit is electrically connected with the input end of the display terminal, and the output end of the display terminal is electrically connected with the input end of the detection device;

the detection device comprises a camera module and a laser point cloud scanning module inside, the output ends of the camera module and the laser point cloud scanning module are electrically connected with the input end of the control module, the output end of the control module is respectively and electrically connected with the input ends of the image extraction module and the laser point cloud receiving module, the output ends of the image extraction module and the laser point cloud receiving module are electrically connected with the input end of the overlapping module, the output end of the overlapping module is respectively and electrically connected with the input ends of the digital modeling module and the adjusting processing module, the output ends of the digital modeling module and the adjusting processing module are electrically connected with the input end of the data comparison module, the data comparison module is in bidirectional connection with the data storage module, the output end of the data comparison module is electrically connected with the input end of the data marking module, and the output end of the data marking module is electrically connected with the input end of the data output module.

Preferably, the adjusting and processing module includes a laser point cloud coordinate system establishing unit therein, an output end of the laser point cloud coordinate system establishing unit is electrically connected with an input end of a laser point coordinate system comparing unit, the laser point coordinate system comparing unit is bidirectionally connected with a threshold setting unit, and an output end of the laser point coordinate system comparing unit is electrically connected with a unit input end of the laser point coordinate system.

Preferably, the overlapping module comprises an image projection unit and a laser cloud projection unit inside, the output ends of the image projection unit and the laser cloud projection unit are electrically connected with the input end of the projection overlapping unit, and the output end of the projection overlapping unit is electrically connected with the input end of the projection output unit.

Preferably, the central processing unit internally comprises a data receiving module, the output end of the data receiving module is electrically connected with the input end of the data processing module, the data processing module is bidirectionally connected with the database, the output end of the data processing module is electrically connected with the input end of the threshold module, the output end of the threshold module is electrically connected with the input end of the marking value output module, the output end of the threshold module is electrically connected with the input end of the data arrangement module, the output end of the data arrangement module is electrically connected with the input end of the data integration module, the output end of the data integration module is electrically connected with the input end of the display terminal, and the input end of the data receiving module is electrically connected with the output end.

Preferably, the data processing module comprises a projection value extraction unit, a mark value extraction unit and a light point value extraction unit inside, the output end of the mark value extraction unit is electrically connected with the input end of the mark value comparison unit, and the mark value comparison unit is in bidirectional connection with the database.

Preferably, the data arrangement module includes a light point value confirmation unit and a projection value confirmation unit, and the number of the light point value confirmation units and the number of the projection value confirmation units are N.

Preferably, the inside spout of having seted up that is close to upper end position department of detection device, detection device surface one side intermediate position department fixed mounting has servo motor, servo motor output fixed mounting has the dwang, the inside equal sliding connection in upper end both sides position department of detection device has the centre gripping plectane, sliding connection has the slider between centre gripping plectane and the spout, limited groove has all been seted up to centre gripping plectane inner wall both sides, the inside swing joint of centre gripping plectane has the semicircle to support the contact, the semicircle supports the contact and restricts the movable rod of injecing between the groove sliding connection, the semicircle supports fixedly connected with conflict spring between contact and the centre gripping plectane.

Preferably, the inside notch that supplies the dwang activity of seting up of slider, positive screw thread and contrary screw thread have been seted up respectively to dwang annular surface both sides, and the inside line seal corresponding with positive screw thread and contrary screw thread of seting up of notch, threaded connection between dwang and the slider, it is connected with the pivot to inject the movable rod and rotate between the semicircle wafer of supporting.

Preferably, a method for rapidly detecting a negative backlash of a hub unit includes the steps of:

step 1, placing an external hub inside a semicircular contact piece, directly opening a circuit switch of a servo motor after the placement is finished, driving a rotating rod to rotate by the servo motor, effectively driving a clamping circular plate to move close together when the rotating rod rotates, and driving a semicircular contact piece to clamp and fix the hub in the process of moving the clamping circular plate close together;

step 2, after the hub is fixed, the camera module and the laser point cloud scanning module start to work, data are conveyed to the image extraction module and the laser point cloud receiving module through the control module, an image projection unit and a laser point cloud projection unit in the overlapping module receive and distinguish the data, the data are overlapped through the projection overlapping unit, the data are conveyed to the digital modeling module and the adjustment processing module respectively through the projection output unit, a laser point cloud coordinate system establishing unit in the adjustment processing module starts to establish a coordinate system, a laser point coordinate system comparison unit performs comparison processing on the data with a numerical value in the threshold setting unit, and after the comparison is completed, the data are uniformly processed through the laser point coordinate system unifying unit;

step 3, the laser point coordinate system unified unit and the digital modeling module respectively transmit data to the interior of the data comparison module, the data comparison module compares the data with the stored data in the data storage module, the data with larger comparison difference is marked by the data marking module, and the data marking module transmits the data to the interior of the central processing unit through the data output module;

step 4, a data receiving module in the central processing unit receives data, the data receiving module transmits the data to the interior of a data processing module, a projection value extracting unit, a mark value extracting unit and a light spot value extracting unit in the data processing module extract external numerical values, a mark value comparing unit compares the numerical values with data in a database, a threshold value module is internally provided with a designated numerical value, and a mark value output module outputs the mark numerical values;

step 5, the data arrangement module receives data in the threshold module, confirms multiple groups of different numerical values, the data integration module integrates the corresponding numerical values, and the integrated numerical values are directly conveyed into the display terminal after integration;

and 6, external operators find the marking value by checking the data in the display terminal, and then change the test data in the detection device by controlling the detection device.

Preferably, the threshold module internal interval value in step 4 is set by a professional, and N groups of light point value confirmation units and projection value confirmation units are arranged in step 5.

Advantageous effects

The invention provides a system and a method for rapidly detecting a negative clearance of a hub unit. Compared with the prior art, the method has the following beneficial effects:

1. the system and the method start to work through a camera module and a laser point cloud scanning module, and transmit data to an image extraction module and a laser point cloud receiving module through a control module, an image projection unit and a laser point cloud projection unit in an overlapping module receive and distinguish the data, overlap the data through a projection overlapping unit, and transmit the data to a digital modeling module and an adjustment processing module respectively through a projection output unit, a laser point cloud coordinate system establishing unit in the adjustment processing module starts to establish a coordinate system, a laser point coordinate system comparing unit compares the data with a numerical value in a threshold setting unit, and after the comparison is finished, the data are processed uniformly through a laser point coordinate system unifying unit, so that the test data can be more accurate effectively, the error that appears in the test procedure has effectively been reduced to reach better detection effect.

2. The system and the method for rapidly detecting the negative clearance of the hub unit respectively convey data to the interior of a data comparison module through a unit of a laser point coordinate system and a digital modeling module, the data comparison module compares the data with the stored data in a data storage module and marks the data with larger comparison difference value through a data marking module, the data marking module conveys the data to the interior of a central processing unit through a data output module, the external numerical value is extracted through a marking value extraction unit and a light point value extraction unit, the marking value comparison unit compares the numerical value with the data in a database, the threshold module is internally provided with a designated numerical value, the marking value output module outputs the marking numerical value, and the designated abnormal numerical value can be rapidly and effectively marked, therefore, the test fixture is conveyed to the outside, so that an operator can conveniently observe and process the test fixture, corresponding errors in the test process are effectively changed, and the processing operation of the external operator is facilitated.

3. According to the negative clearance rapid detection system and the detection method of the hub unit, data inside the threshold module are received through the data arrangement module, a plurality of groups of different numerical values are confirmed and processed, the data integration module integrates the corresponding numerical values again, after the integration is completed, the corresponding numerical values are directly conveyed into the display terminal, the corresponding numerical values can be effectively integrated, the unified conveying is completed, the data confusion is effectively avoided, when external personnel check the corresponding numerical values, the external personnel still need to rearrange the corresponding numerical values, and the checking and processing of the numerical values by the external personnel are facilitated.

4. This wheel hub unit's negative play short-term test system and detection method, through place outside wheel hub inside the semicircle is supported the contact, place the back that finishes, directly open servo motor's circuit switch, servo motor drives the dwang and rotates, when the dwang rotates, positive screw thread and contrary screw thread have been seted up respectively because of dwang annular surface, just can effectively drive the centre gripping plectane and draw close the removal, the centre gripping plectane draws close the removal in-process, it presss from both sides tight fixedly to drive semicircle conflict piece wheel hub, the inside semicircle is provided with supports the contact piece that the semicircle supports, semicircle conflict piece is contradicted wheel hub, the in-process of contradicting, the rotation effect through injecing the movable rod and the elastic force effect of conflict spring, can effectively accomplish the fixed action to wheel hub, be convenient for outside personnel detect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the working principle of the present invention;

FIG. 3 is a schematic diagram of the principle framework of the detecting device of the present invention;

FIG. 4 is a schematic diagram of a schematic framework of an adjustment processing module according to the present invention;

FIG. 5 is a schematic diagram of the overlapping module concept of the present invention;

FIG. 6 is a schematic diagram of a CPU schematic according to the present invention;

FIG. 7 is a block diagram of a data processing module schematic framework of the present invention;

FIG. 8 is a block diagram of a data arrangement module according to the present invention;

FIG. 9 is an enlarged view of a portion of the structure of area A of FIG. 1 according to the present invention;

FIG. 10 is a schematic plan view of the internal structure of the clamping disk according to the present invention.

In the figure: 1. a detection device; 11. a camera module; 12. a laser point cloud scanning module; 13. a control module; 14. an image extraction module; 15. a laser point cloud receiving module; 16. an overlap module; 161. an image projection unit; 162. a laser cloud projection unit; 163. a projection overlapping unit; 164. a projection output unit; 17. a digital modeling module; 18. an adjustment processing module; 181. a laser point cloud coordinate system establishing unit; 182. a laser point coordinate system comparison unit; 183. a laser spot coordinate system unit; 184. a threshold setting unit; 19. a data comparison module; 110. a data storage module; 111. a data marking module; 112. a data output module; 2. a central processing unit; 21. a data receiving module; 22. a data processing module; 221. a projection value extraction unit; 222. a tag value extraction unit; 223. a light point value extraction unit; 224. a tag value comparison unit; 23. a threshold module; 24. a database; 25. a data arrangement module; 251. a light spot value confirmation unit; 252. a projection value confirmation unit; 26. a data integration module; 27. a tag value output module; 3. a display terminal; 4. a servo motor; 5. a chute; 6. clamping a circular plate; 61. defining a slot; 62. a limiting movable rod; 7. the semi-circle abuts against the contact piece; 8. rotating the rod; 9. a slider; 10. against the spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a quick detection system for negative play of a hub unit comprises a detection device 1, a central processing unit 2 and a display terminal 3, wherein the output end of the detection device 1 is electrically connected with the input end of the central processing unit 2, the output end of the central processing unit 2 is electrically connected with the input end of the display terminal 3, and the output end of the display terminal 3 is electrically connected with the input end of the detection device 1;

the detection device 1 internally comprises 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 with the input end of a control module 13, the output end of the control module 13 is electrically connected with the input ends of an image extraction module 14 and a 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 with the input end of an overlapping module 16, the output end of the overlapping module 16 is electrically connected with the input ends of a digital modeling module 17 and an adjustment processing module 18 respectively, the output ends of the digital modeling module 17 and the adjustment processing module 18 are electrically connected with the input end of a data comparison module 19, the data comparison module 19 and a data storage module 110 are in bidirectional connection, the output end of the data comparison module 19 is electrically connected with the input end of a data marking module 111;

referring to fig. 4, the adjusting module 18 includes a laser point cloud coordinate system establishing unit 181, an output end of the laser point cloud coordinate system establishing unit 181 is electrically connected to an 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 an output end of the laser point coordinate system comparing unit 182 is electrically connected to an input end of the laser point coordinate system unifying unit 183.

Referring to fig. 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 a projection overlapping unit 163, and the output end of the projection overlapping unit 163 is electrically connected to the input end of a projection output unit 164.

Referring to fig. 6, the central processing unit 2 includes a data receiving module 21 therein, an output end of the data receiving module 21 is electrically connected to an input end of the data processing module 22, the data processing module 22 is bidirectionally connected to the database 24, an output end of the data processing module 22 is electrically connected to an input end of the threshold module 23, an output end of the threshold module 23 is electrically connected to an input end of the tag value output module 27, an output end of the threshold module 23 is electrically connected to an input end of the data arranging module 25, an output end of the data arranging module 25 is electrically connected to an input end of the data integrating module 26, an output end of the data integrating module 26 is electrically connected to an input end of the display terminal 3, and an input end of the data.

Referring to fig. 7, the data processing module 22 includes a projection value extracting unit 221, a mark value extracting unit 222, and a light spot value extracting unit 223, wherein an output end of the mark value extracting unit 222 is electrically connected to an input end of the mark value comparing unit 224, and the mark value comparing unit 224 is connected to the database 24 in a bidirectional manner.

Referring to fig. 8, the data arrangement module 25 includes a light point value confirmation unit 251 and a projection value confirmation unit 252, where N light point value confirmation units 251 and N projection value confirmation units 252 are provided.

Referring to fig. 1 and 9, a sliding groove 5 is formed in the detection device 1 near the upper end, a servo motor 4 is fixedly mounted at the middle position of one side of the outer surface of the detection device 1, a rotating rod 8 is fixedly mounted at the output end of the servo motor 4, clamping disks 6 are slidably connected to positions of two sides of the upper end in the detection device 1, a sliding block 9 is slidably connected between the clamping disks 6 and the sliding groove 5, limited grooves 61 are formed in two sides of the inner wall of each clamping disk 6, a semicircular contact piece 7 is movably connected in the clamping disk 6, limited movable rods 62 are slidably connected between the semicircular contact piece 7 and the limited grooves 61, and a contact spring 10 is fixedly connected between the semicircular contact piece 7 and the clamping disk 6.

Referring to fig. 10, a notch for moving the rotating rod 8 is formed in the slider 9, a positive thread and a negative thread are respectively formed on two sides of the annular outer surface of the rotating rod 8, a groove corresponding to the positive thread and the negative thread is formed in the notch, the rotating rod 8 is in threaded connection with the slider 9, and a rotating shaft is rotatably connected between the limiting movable rod 62 and the semicircular contact piece 7.

Further, a method for rapidly detecting a negative backlash of a hub unit includes the steps of:

step 1, an external hub is placed inside a semicircular contact piece 7, after the placement is finished, a circuit switch of a servo motor 4 is directly turned on, the servo motor 4 drives a rotating rod 8 to rotate, when the rotating rod 8 rotates, a clamping circular plate 6 is effectively driven to move close, and the semicircular contact piece 7 is driven to clamp and fix the hub in the closing movement process of the clamping circular plate 6;

step 2, after the hub is fixed, the camera module 11 and the laser point cloud scanning module 12 start to work, and transmit 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 point cloud projection unit 162 in the overlapping module 16 receive and distinguish data, overlap the data through the projection overlapping unit 163, and transmit the data to the digital modeling module 17 and the adjustment processing module 18 through the projection output unit 164, the laser point cloud coordinate system establishing unit 181 in the adjustment processing module 18 starts to establish a coordinate system, the laser point coordinate system comparing unit 182 compares the data with the value in the threshold setting unit 184, and after the comparison is completed, the laser point cloud coordinate system unifying unit 183 unifies the data;

step 3, the laser point coordinate system unified unit 183 and the digital modeling module 17 respectively transmit data to the inside of the data comparison module 19, the data comparison module 19 compares the data with the stored data in the data storage module 110, the data with a large comparison difference is marked by the data marking module 111, and the data marking module 111 transmits the data to the inside of the central processing unit 2 through the data output module 112;

step 4, a data receiving module 21 in the central processing unit 2 receives data, the data receiving module 21 transmits the data to the inside of a data processing module 22, a projection value extracting unit 221, a mark value extracting unit 222 and a light spot value extracting unit 223 in the data processing module 22 extract external numerical values, a mark value comparing unit 224 compares the numerical values with data in the database 24, a specified numerical value is set in a threshold module 23, and a mark value output module 27 outputs the mark numerical values;

step 5, the data arrangement module 25 receives the data in the threshold module 23, confirms and processes a plurality of groups of different numerical values, the data integration module 26 integrates and processes the corresponding numerical values, and the integrated numerical values are directly transmitted to the inside of the display terminal 3;

and 6, an external operator finds the mark value by checking the data in the display terminal 3, and then changes the test data in the detection device 1 by controlling the detection device 1.

In step 4, the interval value inside the threshold module 23 is set by a professional, and N sets of values are set inside the light point value confirmation unit 251 and the projection value confirmation unit 252 in step 5.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.