Wheel hub detection device and detection method

Abstract

The present invention discloses a wheel hub detection device and detection method, comprising a transport mechanism, a detection mechanism and a controller, wherein the detection mechanism comprises a fixed frame, a cylinder 1, a visual module 1 and a wheel hub adjustment component, wherein the fixed frame is mounted on the transport mechanism, the cylinder 1 is installed on the fixed frame, the visual module 1 and the wheel hub adjustment component are respectively fixed on the driving end of the cylinder 1, the controller is arranged on one side of the transport mechanism, and is used to control the operation of the transport mechanism and the detection mechanism, the transport mechanism is used to transport the wheel hub to be detected, and the detection mechanism is used to perform comprehensive detection on the wheel hub surface. The present invention improves the comprehensiveness and accuracy of the wheel hub surface detection.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hub detection, and in particular to a wheel hub detection device and a detection method. Background Art

[0002] The wheel hub is an important part of the car, and its quality and safety are crucial to people's travel. Wheel hub surface inspection is an important part of ensuring the quality and safety of automobile wheel hubs. With the development of technology, automated wheel hub surface defect detection technology has gradually replaced traditional manual inspection methods. These technologies mainly include machine vision-based inspection systems that use deep learning algorithms to identify defects on the wheel hub surface, such as scratches and abrasions. For example, researchers have proposed a detection and recognition algorithm based on image processing and convolutional neural networks. Through the selection of industrial cameras, lenses, lighting sources and methods, combined with coaxial lighting, the wheel hub surface image acquisition and automatic defect detection are realized.

[0003] Nowadays, wheel hub inspection equipment is gradually simplified, and wheel hub assembly line inspection can be achieved through a transport line and a visual inspection instrument. The surface inspection of the wheel hub mainly includes three categories: size inspection, surface defect inspection and surface coating inspection, which requires the accuracy of visual inspection and the comprehensiveness of surface detection.

[0004] The existing wheel hub detection device can ensure the detection accuracy, but it is slightly insufficient in controlling the wheel hub for detection. In order to free up manpower and realize automation, the wheel hub will be transported by a roller structure, then positioned by a clamping structure, and finally detected by the detector. However, the clamping structure will affect the comprehensiveness of the visual inspection, the clamped part cannot be detected well, and the visual inspection instrument has certain visual blind spots. For example, the bottom and sides of the wheel hub cannot be detected well, and manual flipping is often required for adjustment. Summary of the invention

[0005] The object of the present invention is to provide a wheel hub detection device and a detection method to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a wheel hub detection device, comprising a transportation mechanism, a detection mechanism and a controller, the detection mechanism comprising a fixed frame, a cylinder one, a visual module one and a wheel hub adjustment assembly, wherein the fixed frame is mounted on the transportation mechanism, the cylinder one is installed on the fixed frame, the visual module one and the wheel hub adjustment assembly are respectively fixed on the driving end of the cylinder one, the controller is arranged on one side of the transportation mechanism, and is used to control the operation of the transportation mechanism and the detection mechanism, the transportation mechanism is used to transport the wheel hub to be detected, and the detection mechanism is used to perform comprehensive detection of the wheel hub surface.

[0007] According to the above technical solution, the wheel hub adjustment assembly includes a mounting plate, an adjustment rod and an air pump, wherein the mounting plate is fixed to a driving end of the cylinder, the adjustment rod is a hollow structure with an opening on the upper side, a threaded barrel is sleeved on the outer side of the upper end of the adjustment rod, a flexible outer cover is sleeved on the outer side of the lower end of the adjustment rod, a portion of the circumference of the adjustment rod located inside the flexible outer cover is provided with a plurality of sliding grooves, the sliding grooves are slidably connected with a slider, a top block is fixed on the outer side of the slider, the threaded barrel is rotatably matched with the mounting plate, and an output end of the air pump is connected to the upper opening of the adjustment rod.

[0008] According to the above technical solution, the flexible outer cover is made of a tough and airtight material, the threaded barrel is provided with a drive module for further adjusting the height of the adjusting rod, the drive module adopts a motor gear transmission structure, and the air pump is provided with several output ports, several of which are connected to the adjusting rod for introducing or extracting airflow into or out of the adjusting rod.

[0009] According to the above technical solution, an air flow channel is opened inside the slider, and the air flow channel is composed of a main channel and a plurality of branch channels, wherein the main channel opens toward the inside of the adjusting rod, and the branch channel opens toward the outside of the adjusting rod, and the main channel and the branch channel are connected to each other.

[0010] According to the above technical solution, a limiting rod is passed through the lower end of the adjusting rod, and a visual module 2 is arranged at the bottom of the adjusting rod.

[0011] According to the above technical solution, a limiting push block is fixed to one end of the limiting rod toward the inner side of the adjusting rod, and the limiting push block is arranged to have a gradient structure which is narrow at the top and wide at the bottom.

[0012] According to the above technical solution, a group of auxiliary detection modules are arranged on both sides of the fixed frame, and the auxiliary detection modules include a screw drive module, a movable frame, a rotating rod, a motor 1, a nozzle and a visual module 3, wherein the movable frame is fixed at the driving end of the screw drive module, the rotating rod is rotatably arranged on the movable frame, the driving end of the motor 1 is connected to the rotating rod, the nozzle is fixed on the rotating rod and the input end is connected to one of the output ports of the air pump, and the visual module 3 is arranged on the nozzle.

[0013] According to the above technical solution, the transportation mechanism includes a feeding component and a sorting component, wherein the sorting component is arranged at the discharge port of the feeding component.

[0014] According to the above technical solution, a positioning module and a blocking module are provided on the lower side of the feed assembly, wherein the positioning module is used to adjust the wheel hub to the center position of the feed assembly.

[0015] According to the above technical solution, the positioning module includes motor 2 and a group of limit plates, wherein the limit plates are arranged relatively to each other and are respectively connected to the output ends of motor 2, motor 2 is used to control the two limit plates to move closer or farther away, and pressure sensing units are arranged on the opposite surfaces of the limit plates.

[0016] According to the above technical solution, the blocking module includes a second cylinder and a baffle, wherein the baffle is fixed to the driving end of the second cylinder, the baffle is configured as a U-shaped structure and a pressure sensing unit is provided toward the feeding side.

[0017] According to the above technical solution, the U-shaped groove surface of the baffle is provided with a screw drive module and a vision module four, wherein the vision module four is fixed to the driving end of the screw drive module.

[0018] According to the above technical solution, the sorting component includes a finished product output module, a defective product output module, cylinder three and a sorting plate, wherein the conveying direction of the defective product output module is perpendicular to the finished product output module, the cylinder three is fixed on the lower side of the defective product output module, and the sorting plate is fixed at the driving end of the cylinder three and is located at the finished product output module.

[0019] According to the above technical solution, the push surface of the sorting plate is provided with several pressure detection grooves, the pressure detection grooves are connected with detection springs, one end of the detection springs is connected with a cover plate, and the groove surface of the pressure detection grooves is paved with pressure sensing units.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention is provided with a wheel hub adjustment component, wherein the visual module 2 can be used for detecting the inner wall surface of the wheel hub axle center hole. When airflow is introduced into the adjustment rod, the slider and the limit rod can lock the wheel hub. After the wheel hub is lifted, the visual module 3 and the visual module 4 can respectively detect the side surface and the lower surface of the wheel hub, and with the auxiliary cleaning of the nozzle, the detection is more comprehensive and accurate, and can be automated without turning over the wheel hub, thereby reducing manpower requirements. By providing a sorting component, qualified products and defective products can be flexibly sorted according to the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a partial schematic diagram of the present invention;

[0024] Figure 3is a partial schematic diagram of the wheel hub adjustment assembly of the present invention;

[0025] Figure 4 It is a partial schematic diagram of the adjustment rod of the present invention;

[0026] Figure 5 is a schematic diagram of the airflow channel of the present invention;

[0027] Figure 6 is a schematic diagram of a limit rod of the present invention;

[0028] Figure 7 is a cross-sectional view of a limit rod of the present invention;

[0029] Figure 8 It is a schematic diagram of a feeding assembly of the present invention;

[0030] Fig. 9 is a schematic diagram of a sorting assembly of the present invention;

[0031] Fig.10 is a partial cross-sectional view of a sorting plate of the present invention;

[0032] In the figure: 1. controller; 2. fixed frame; 21. screw drive module; 22. mobile frame; 23. rotating rod; 24. motor 1; 25. nozzle; 26. visual module 3; 3. cylinder 1; 4. visual module 1; 5. hub adjustment assembly; 51. mounting plate; 52. adjustment rod; 521. threaded cylinder; 522. flexible cover; 523. slide; 524. slider; 5241. top block; 5242. main channel; 5243. branch channel; 525. Limit rod; 5251, limit push block; 526, visual module two; 53, air pump; 54, drive module; 6, feed assembly; 61, motor two; 62, limit plate; 63, cylinder two; 64, baffle; 65, screw drive module; 66, visual module four; 7, sorting assembly; 71, finished product output module; 72, defective product output module; 73, cylinder three; 74, sorting plate; 741, pressure detection slot; 742, detection spring; 743, cover plate. DETAILED DESCRIPTION

[0033] 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.

[0034] See also Figure 1-10The present invention provides a technical solution: a wheel hub detection device, including a transport mechanism, a detection mechanism and a controller 1, the detection mechanism includes a fixing frame 2, a cylinder 3, a visual module 4 and a wheel hub adjustment component 5, wherein the fixing frame 2 is mounted on the transport mechanism, the cylinder 3 is installed on the fixing frame 2, the visual module 4 and the wheel hub adjustment component 5 are respectively fixed on the driving end of the cylinder 3, the controller 1 is arranged on one side of the transport mechanism, and is used to control the operation of the transport mechanism and the detection mechanism, the transport mechanism is used to transport the wheel hub to be detected, and the detection mechanism is used to perform comprehensive detection on the surface of the wheel hub;

[0035] The hub adjustment assembly 5 includes a mounting plate 51, an adjustment rod 52 and an air pump 53, wherein the mounting plate 51 is fixed to the driving end of the cylinder 3, the adjustment rod 52 is a hollow structure with an opening on the upper side, a threaded tube 521 is sleeved on the outer side of the upper end of the adjustment rod 52, a flexible outer cover 522 is sleeved on the outer side of the lower end of the adjustment rod 52, a portion of the circumference of the adjustment rod 52 located inside the flexible outer cover 522 is provided with a plurality of slide grooves 523, the slide grooves 523 are slidably connected with a slider 524, a top block 5241 is fixed on the outer side of the slider 524, the threaded tube 521 is rotatably matched with the mounting plate 51, and an output end of the air pump 53 is connected to the upper opening of the adjustment rod 52.

[0036] Supplementary explanations about the above structure are as follows: the flexible outer cover 522 is made of a tough and airtight material, the cylinder 3 is used to adjust the height of the visual module 4 and the hub adjustment assembly 5, the visual module 4 is used to detect the upper surface of the lower hub, the threaded barrel 521 is equipped with a drive module 54 for further adjusting the height of the adjustment rod 52, the drive module 54 adopts but is not limited to a motor gear transmission structure, the air pump 53 is provided with several output ports, some of which are connected to the adjustment rod 52, for introducing or extracting air into or out of the adjustment rod 52.

[0037] An air flow channel is opened inside the slider 524, and the air flow channel is composed of a main channel 5242 and a plurality of branch channels 5243, wherein the main channel 5242 opens toward the inside of the adjustment rod 52, and the branch channels 5243 open toward the outside of the adjustment rod 52, and the main channel 5242 and the branch channels 5243 are connected to each other.

[0038] In actual operation, when the air pump 53 inputs air flow into the adjusting rod 52, the positive pressure inside the adjusting rod 52 increases, and the air flow pushes the slider 524 to move outward; when the air pump 53 draws air flow into the adjusting rod 52, the negative pressure inside the adjusting rod 52 increases, the gas flows back through the air flow channel, and the slider 524 moves inward under the influence of the reflux air flow and the negative pressure.

[0039] A limiting rod 525 is passed through the lower end of the adjusting rod 52 , and a second visual module 526 is arranged at the bottom of the adjusting rod 52 .

[0040] A limiting push block 5251 is fixed to one end of the limiting rod 525 toward the inside of the adjusting rod 52. The limiting push block 5251 is set to a gradient structure with a narrow top and a wide bottom, which is used to assist the airflow in pushing the limiting rod 525 out while preventing the limiting rod 525 from being completely pushed out of the adjusting rod 52. That is, when the airflow blows in from top to bottom, it will compress the gradient surface of the limiting push block 5251 to generate an outward thrust.

[0041] A group of auxiliary detection modules are arranged on both sides of the fixed frame 2, and the auxiliary detection modules include a screw drive module 21, a movable frame 22, a rotating rod 23, a motor 1 24, a nozzle 25 and a visual module 3 26, wherein the movable frame 22 is fixed at the driving end of the screw drive module 21, the rotating rod 23 is rotatably arranged on the movable frame 22, the driving end of the motor 1 24 is connected to the rotating rod 23, the nozzle 25 is fixed on the rotating rod 23 and the input end is connected to one of the output ports of the air pump 53, and the visual module 3 26 is arranged on the nozzle 25.

[0042] In actual operation, the screw drive module 21 is used to adjust the height of the movable frame 22, the nozzle 25 is used to emit high-speed airflow to remove impurities on the surface of the hub, thereby assisting detection, the visual module three 26 is used to detect the side surface state of the hub, and the motor one 24 is used to adjust the spray angle of the nozzle 25 and adjust the detection angle of the visual module three 26.

[0043] The transport mechanism includes a feed component 6 and a sorting component 7 , wherein the sorting component 7 is arranged at the discharge port of the feed component 6 .

[0044] An alignment module and a blocking module are provided at the lower side of the feed assembly 6, wherein the alignment module is used to adjust the wheel hub to the center position of the feed assembly 6, and the blocking module is used to assist the alignment module.

[0045] The alignment module includes a second motor 61 and a set of limit plates 62, wherein the limit plates 62 are arranged opposite to each other and are respectively connected to the output ends of the second motor 61. The second motor 61 is used to control the two limit plates 62 to move closer or farther away. A pressure sensing unit is arranged on the opposite surface of the limit plates 62 for detecting the presence of the wheel hub.

[0046] The blocking module includes a second cylinder 63 and a baffle 64, wherein the baffle 64 is fixed to the driving end of the second cylinder 63, the baffle 64 is arranged as a U-shaped structure and a pressure sensing unit is arranged toward the feeding side for detecting the existence of the wheel hub.

[0047] The U-shaped groove surface of the baffle 64 is provided with a screw drive module 65 and a vision module four 66, wherein the vision module four 66 is fixed at the driving end of the screw drive module 65, the screw drive module 65 is used to adjust the position of the vision module four 66, and the vision module four 66 is used for surface detection on the lower side of the wheel hub.

[0048] The sorting component 7 includes a finished product output module 71, a defective product output module 72, a cylinder three 73 and a sorting plate 74, wherein the conveying direction of the defective product output module 72 is perpendicular to the finished product output module 71, the cylinder three 73 is fixed on the lower side of the defective product output module 72, and the sorting plate 74 is fixed on the driving end of the cylinder three 73 and is located at the finished product output module 71.

[0049] It should be noted that: if the wheel hub is judged to be a qualified product after inspection, the sorting plate 74 does not move, and the corresponding wheel hub is output by the finished product output module 71; if the wheel hub is judged to be a defective product after inspection, cylinder three 73 controls the sorting plate 74 to push the corresponding wheel hub into the defective product output module 72, and the defective product output module 72 outputs it.

[0050] The push surface of the sorting plate 74 is provided with several pressure detection grooves 741, to which a detection spring 742 is connected. One end of the detection spring 742 is connected to a cover plate 743, wherein the groove surface of the pressure detection groove 741 is paved with a pressure sensing unit for detecting the pressure signal brought by the wheel hub to the cover plate 743 and determining the position of the wheel hub.

[0051] The specific implementation methods are as follows:

[0052] Step 1: Feeding and aligning the wheel hub. The wheel hub is conveyed to the feeding assembly 6. At this time, the blocking module is in the rising state. When the blocking module detects the pressure signal from the wheel hub, the feeding assembly 6 stops conveying, and the aligning module starts. The two limit plates 62 therein approach each other synchronously until the pressure signal from the wheel hub is detected at the same time. At this time, the wheel hub has been adjusted to the center position, the blocking module moves down, and the aligning module releases the restriction on the wheel hub.

[0053] Further, additional explanation for step one: when the wheel hub is transported to one side of the blocking module, because it is in a state of continuous forward transportation, the blocking module will detect the continuous thrust brought by the wheel hub, and on this basis, it can be judged whether the wheel hub is transported to the blocking module side; after the alignment module starts to work, the limit plate 62 on the side that first contacts the wheel hub will push the wheel hub to move toward the middle. At this time, only one limit plate 62 can detect the pressure signal. When the wheel hub is pushed to the center position, the distance between the two limit plates 62 is equal to the diameter of the wheel hub, and the pressure signal is detected at the same time, which can be regarded as the completion of the wheel hub alignment.

[0054] Step 2: upper surface detection, the feeding assembly 6 is started, the wheel hub is transported to the detection mechanism and stopped, the auxiliary detection module is positioned by the visual module three 26, the upper surface of the wheel hub is cleaned by the nozzle 25, and the visual module one 4 detects the upper surface of the wheel hub;

[0055] Step 3: Axis detection, the feeding assembly 6 starts, conveys the wheel hub to the lower side of the visual module 2 526 and then stops, the cylinder 1 3 drives the wheel hub adjustment assembly 5 to move down to the upper side of the wheel hub, and at the same time the adjustment rod 52 is aligned with the position of the wheel hub axis hole, the driving module 54 starts, the adjustment rod 52 moves down into the wheel hub axis hole, and the visual module 2 526 detects the surface state of the wheel hub axis hole;

[0056] Step 4: Side surface inspection. After the adjusting rod 52 completely enters the hub axis hole and the limiting rod 525 is lower than the height of the lower surface of the hub, the air pump 53 introduces air flow into the adjusting rod 52, the limiting rod 525 extends and clamps the lower side of the hub, each slider 524 is pushed out to press against the inner wall of the hub axis hole and locked, the cylinder 1 3 rises to lift the hub to a certain height, the auxiliary inspection module is positioned by the visual module 3 26, the side surface of the hub is cleaned by the nozzle 25, and the visual module 3 26 inspects the side surface of the hub;

[0057] Further, additional explanation for step four: after the limit rod 525 is extended, its length exceeds the range of the hub axial aperture, so that the limit rod 525 forms a temporary bracket at the bottom of the hub, preventing the hub from escaping from the restriction of the slider 524 and falling; when cleaning and inspecting the side surface of the hub, the drive module 54 drives the hub to rotate by rotating the adjustment rod 52 to adjust the position of cleaning and visual inspection.

[0058] Step 5: Lower surface detection, the auxiliary detection module is positioned by the visual module three 26, the lower surface of the wheel hub is cleaned by the nozzle 25, the blocking module rises, and the visual module four 66 detects the lower surface of the wheel hub;

[0059] Step 6: Analysis and judgment: Based on the data feedback from the testing agency, the controller 1 judges whether the products are qualified or defective;

[0060] Step seven: Sorting: according to the judgment result of the controller 1, the sorting component 7 performs sorting.

[0061] Furthermore, the sorting plate 74 can be used to identify the number and position of the wheel hubs. For example, if the two wheel hubs are relatively close, the sorting plate 74 can detect the pressure signals of the two intervals. If both are qualified products according to the detection results, the sorting plate 74 will not move and release them; if both are defective products according to the detection results, the finished product output module 71 will first roll in the reverse direction, so that one of the wheel hubs is out of the dragging range of the sorting plate 74, and the sorting plate 74 will first push one defective product into the defective product output module 72, and then push the other one into the defective product output module 72. Push in to avoid entrance blockage; if according to the test results, one is a defective product and the other is a qualified product, when the qualified product comes first, the sorting plate 74 will not move first, until the first section of the pressure signal disappears and only the second section of the pressure signal remains, and the defective product corresponding to the second section of the pressure signal is pushed into the defective product output module 72. When the defective product comes first, the finished product output module 71 will roll in the opposite direction first to remove the qualified product from the dragging range of the sorting plate 74, and the sorting plate 74 will push the defective product into the defective product output module 72 to release the qualified product.

[0062] 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.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wheel hub detection device, comprising a transport mechanism, a detection mechanism and a controller (1), characterized in that: The detection mechanism comprises a fixing frame (2), a cylinder 1 (3), a visual module 1 (4) and a wheel hub adjustment assembly (5), wherein the fixing frame (2) is mounted on the transport mechanism, the cylinder 1 (3) is installed on the fixing frame (2), the visual module 1 (4) and the wheel hub adjustment assembly (5) are respectively fixed on the driving end of the cylinder 1 (3), the controller (1) is arranged on one side of the transport mechanism, and is used to control the operation of the transport mechanism and the detection mechanism, the transport mechanism is used to transport the wheel hub to be detected, and the detection mechanism is used to perform a comprehensive detection on the surface of the wheel hub; The hub adjustment assembly (5) comprises a mounting plate (51), an adjustment rod (52) and an air pump (53), wherein the mounting plate (51) is fixed to the driving end of the cylinder (3); the adjustment rod (52) is a hollow structure with an upper opening; a threaded tube (521) is sleeved on the outer side of the upper end of the adjustment rod (52); a flexible outer cover (522) is sleeved on the outer side of the lower end of the adjustment rod (52); a portion of the circumference of the adjustment rod (52) located inside the flexible outer cover (522) is provided with a plurality of slide grooves (523); a slider (524) is slidably connected to the slide groove (523); a top block (5241) is fixed on the outer side of the slider (524); the threaded tube (521) is rotatably matched with the mounting plate (51); and an output end of the air pump (53) is connected to the upper opening of the adjustment rod (52); An air flow channel is provided inside the slider (524), and the air flow channel is composed of a main channel (5242) and a plurality of branch channels (5243), wherein the main channel (5242) opens toward the inside of the adjustment rod (52), and the branch channels (5243) open toward the outside of the adjustment rod (52), and the main channel (5242) and the branch channels (5243) are connected to each other; A limiting rod (525) is provided at the lower end of the adjusting rod (52); A limiting push block (5251) is fixed to one end of the limiting rod (525) toward the inside of the adjusting rod (52). The limiting push block (5251) is configured as a gradient structure that is narrow at the top and wide at the bottom, and is used to assist in cooperating with the airflow to push the limiting rod (525) out while preventing the limiting rod (525) from being completely pushed out of the adjusting rod (52). That is, when the airflow blows in from top to bottom, it will compress the gradient surface of the limiting push block (5251) to generate an outward thrust.

2. A wheel hub detection device according to claim 1, characterized in that: The flexible outer cover (522) is made of a material with good toughness and is airtight. The threaded barrel (521) is provided with a driving module (54) in cooperation with the driving module (54). The driving module (54) adopts a motor gear transmission structure. The air pump (53) is provided with a plurality of output ports.

3. A wheel hub detection device according to claim 2, characterized in that: A second visual module (526) is provided at the bottom of the adjustment rod (52).

4. A wheel hub detection device according to claim 3, characterized in that: A group of auxiliary detection modules are arranged on both sides of the fixed frame (2), and the auxiliary detection modules include a screw drive module (21), a movable frame (22), a rotating rod (23), a motor 1 (24), a nozzle (25) and a visual module 3 (26), wherein the movable frame (22) is fixed to the driving end of the screw drive module (21), the rotating rod (23) is rotatably arranged on the movable frame (22), the driving end of the motor 1 (24) is connected to the rotating rod (23), the nozzle (25) is fixed on the rotating rod (23) and the input end is connected to one of the output ports of the air pump (53), and the visual module 3 (26) is arranged on the nozzle (25).

5. A wheel hub detection device according to claim 4, characterized in that: The transport mechanism comprises a feeding component (6) and a sorting component (7), wherein the sorting component (7) is arranged at the discharge port of the feeding component (6); A positioning module and a blocking module are arranged at the lower side of the feed assembly (6), wherein the positioning module is used to adjust the wheel hub to the center position of the feed assembly (6).

6. A wheel hub detection device according to claim 5, characterized in that: The alignment module comprises a second motor (61) and a group of limit plates (62), wherein the limit plates (62) are arranged opposite to each other and are respectively connected to the output ends of the second motor (61), the second motor (61) is used to control the two limit plates (62) to move closer or farther away, and a pressure sensing unit is arranged on the opposite surface of the limit plates (62) for detecting the existence of the wheel hub.

7. A wheel hub detection device according to claim 6, characterized in that: The blocking module comprises a second cylinder (63) and a baffle (64), wherein the baffle (64) is fixed to the driving end of the second cylinder (63), and the baffle (64) is arranged in a U-shaped structure and is provided with a pressure sensing unit facing the feeding side, for detecting the presence of the wheel hub; The U-shaped groove surface of the baffle (64) is provided with a screw drive module (65) and a vision module four (66), wherein the vision module four (66) is fixed on the driving end of the screw drive module (65), the screw drive module (65) is used to adjust the position of the vision module four (66), and the vision module four (66) is used for surface detection on the lower side of the wheel hub.

8. The detection method of a wheel hub detection device according to claim 7, characterized in that: The specific detection methods are as follows: Step 1: Feeding and aligning the wheel hub, conveying the wheel hub to the feeding assembly (6), at which time the blocking module is in an ascending state. When the blocking module detects a pressure signal from the wheel hub, the feeding assembly (6) stops conveying, the aligning module starts, and the two limit plates (62) therein move toward each other synchronously until the pressure signal from the wheel hub is detected at the same time. At this time, the wheel hub has been adjusted to the center position, the blocking module moves downward, and the aligning module releases the restriction on the wheel hub; Step 2: upper surface inspection, the feeding assembly (6) is started, the wheel hub is transported to the inspection mechanism and stopped, the auxiliary inspection module is positioned by the visual module three (26), the upper surface of the wheel hub is cleaned by the nozzle (25), and the visual module one (4) inspects the upper surface of the wheel hub; Step 3: Axis detection, the feeding assembly (6) starts, and stops after conveying the wheel hub to the lower side of the visual module 2 (526), ​​the cylinder 1 (3) drives the wheel hub adjustment assembly (5) to move down to the upper side of the wheel hub, and at the same time the adjustment rod (52) is aligned with the position of the wheel hub axis hole, the driving module (54) starts, the adjustment rod (52) moves down into the wheel hub axis hole, and the visual module 2 (526) detects the surface state of the wheel hub axis hole; Step 4: side surface inspection. After the adjusting rod (52) completely enters the hub axis hole and the limiting rod (525) is lower than the height of the lower surface of the hub, the air pump (53) introduces air flow into the adjusting rod (52). The limiting rod (525) extends and clamps the lower side of the hub. Each slider (524) is pushed out to press against the inner wall of the hub axis hole and lock. The cylinder one (3) rises to lift the hub to a certain height. The auxiliary inspection module is positioned by the visual module three (26). The side surface of the hub is cleaned by the nozzle (25). The visual module three (26) inspects the side surface of the hub. Step 5: Lower surface inspection, the auxiliary inspection module is positioned by the visual module three (26), the lower surface of the wheel hub is cleaned by the nozzle (25), the blocking module rises, and the visual module four (66) inspects the lower surface of the wheel hub; Step 6: Analysis and judgment: Based on the data feedback from the testing agency, the controller (1) determines whether the product is qualified or defective; Step 7: Sorting: According to the judgment result of the controller (1), the sorting component (7) performs sorting.

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