A tire defect detection device based on machine vision

Abstract

The present invention relates to the field of tire detection technology, and discloses a tire defect detection device based on machine vision, including a workbench, a visual detection component for detecting tires is arranged on the top of the workbench, and the visual detection component includes a first industrial camera for detecting the tire sidewall, a second industrial camera for detecting the outer crown of the tire, and a third industrial camera for detecting the inner crown of the tire. The tire defect detection device based on machine vision can facilitate three groups of industrial cameras to detect the outer surface and inner surface of the tire through the rotation of the tire, thereby improving the detection effect and range of the tire. Through the setting of the extrusion component, the tread of the tire detection area can be squeezed, thereby improving the crack appearance effect on the tire. The extrusion method includes squeezing from the inside to the outside and squeezing from the outside to the inside, thereby improving the detection effect of the inside and outside of the tire.

Description

Technical Field

[0001] The present invention relates to the technical field of tire detection, and in particular to a tire defect detection device based on machine vision. Background Art

[0002] After tires are manufactured, corresponding testing equipment is usually required to inspect and process the tires to ensure the qualification of the tires after production. The Chinese invention patent with publication number CN116152228B discloses a tire defect detection method and system based on machine vision and machine learning, including: an image acquisition module for collecting image data of different parts of the tire to be inspected; a control server for extracting image features in the image data. The acquisition unit of the image acquisition module includes three linear industrial scanning cameras and a barcode reader. The linear industrial scanning cameras and the barcode reader are installed on the detection frame in the tire inspection area. The three linear industrial scanning cameras are used to collect images of the tire crown, upper sidewall and lower sidewall respectively. The barcode reader is used to collect the tire barcode and send the barcode to the data processing unit of the image acquisition module.

[0003] In the related technology, the existing tire detection equipment mostly uses machine vision to detect, such as by using high-definition industrial cameras to collect data on the tire. However, the use of a single industrial camera cannot effectively detect cracks on the tire. Even after the tire is inflated, the cracks cannot be well displayed. The lack of the function of squeezing the tire makes the tire bulge inward and outward, so that the outer and inner surfaces of the tire cannot be effectively and accurately detected. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a tire defect detection device based on machine vision. The wheel hub member is composed of an upper wheel hub and a lower wheel hub, which is convenient for workers to disassemble and assemble the tire and improve the detection efficiency of the tire. Through the rotation of the tire, three groups of industrial cameras can be used to detect the outer surface and inner surface of the tire, thereby improving the detection effect and range of the tire. Through the setting of the extrusion component, the tread of the tire detection area can be squeezed, thereby improving the effect of showing cracks on the tire. The extrusion method includes squeezing from the inside to the outside and squeezing from the outside to the inside, which further improves the detection effect of the inside and outside of the tire, and solves the problem that the existing detection equipment lacks the function of squeezing the tire, causing the tire to bulge inward and outward, so that the outer surface and inner surface of the tire cannot be effectively and accurately detected.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tire defect detection device based on machine vision, comprising a workbench, a visual detection component for detecting a tire is arranged on the top of the workbench, and the visual detection component comprises a first industrial camera for detecting a tire sidewall, a second industrial camera for detecting an outer crown of the tire, and a third industrial camera for detecting an inner crown of the tire;

[0008] The top of the workbench is fixedly connected to a gantry, and the bottom of the gantry is fixedly connected to two hydraulic cylinders, a fixed plate is fixedly connected between the telescopic ends of the two hydraulic cylinders, the top of the workbench is rotatably connected to a rotating disk, a hub part for assembling tires is arranged between the rotating disk and the fixed plate; the hub part includes an upper wheel hub rotatably connected to the bottom of the fixed plate and a lower wheel hub fixed to the top of the rotating disk, an extrusion assembly for extruding the tire is arranged on the workbench, and the top of the fixed plate is fixedly connected to a motor for rotationally driving the upper wheel hub.

[0009] Preferably, the number of the first industrial cameras is two, which are fixed to one side of the top of the workbench by a U-shaped bracket, and the acquisition ends of the two first industrial cameras are facing the two sidewalls of the tire. The second industrial camera is fixed to the other side of the top of the workbench by a support frame, and the third industrial camera is arranged inside the hub component.

[0010] Preferably, the top of the upper hub is fixedly connected to an air injection pipe, and a switch valve and a pressure gauge are respectively installed on the air injection pipe.

[0011] Preferably, the extrusion assembly includes a crown extrusion piece and an inner extrusion piece arranged on a workbench, the crown extrusion piece is located on the back of the hub piece, the extrusion end of the inner extrusion piece is located inside the hub piece, the crown extrusion piece and the inner extrusion piece are connected by a transmission piece, and the top of the workbench is fixedly connected to an electric telescopic rod for longitudinally driving the crown extrusion piece through a bracket.

[0012] Preferably, the tire crown extrusion component comprises a sliding frame slidably connected to the top of the workbench, the top of the sliding frame is fixedly connected to a U-shaped frame, and the inside of the U-shaped frame is rotatably connected to a first pressing roller.

[0013] Preferably, the inner extrusion member includes a sleeve fixed on the workbench, and the top end of the sleeve extends between the upper hub and the lower hub, the sleeve is sealed and connected to the lower hub through a sealing sleeve, the outer surface of the top end of the sleeve is fixedly connected to a set plate, the third industrial camera is fixedly connected to the longitudinal end of the set plate, and both sides of the top of the set plate are slidably connected to sliding blocks;

[0014] One side of one of the sliding blocks is rotatably connected with a second pressing roller for extruding the inner tube crown through a connecting frame, and one side of the other sliding block is provided with two third pressing rollers for extruding the inner tube side.

[0015] Preferably, a sleeve is fixedly connected to one side of the top of the triangular plate, and the outer surface of the sleeve is fixedly connected to a bidirectional telescopic rod via a bracket, and the two third pressure rollers are rotatably connected to the two telescopic ends of the bidirectional telescopic rod via a U-shaped block, and a driving rod is inserted into the interior of the sleeve, one end of the driving rod is fixedly connected to another sliding block, and the other end of the driving rod is hinged to two inclined connecting rods, and one end of the two connecting rods is respectively hinged to the two U-shaped blocks.

[0016] Preferably, the transmission member comprises a lifting frame slidably connected to a movable frame at the bottom of the workbench, a pull rod is fixedly connected to the top of the movable frame, the top of the pull rod extends to the inside of the hub member, the top of the pull rod is hinged with two tilting frames, and the bottom ends of the two tilting frames are respectively hinged to two sliding blocks;

[0017] A triangular frame is fixedly connected to one side of the bottom of the sliding frame through a fixing frame, and an inclined surface of the triangular frame is slidably connected to the bottom of the inner wall of the movable frame.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention provides a tire defect detection device based on machine vision, which has the following beneficial effects:

[0020] 1. The present invention adopts an upper hub and a lower hub as the hub member, so that the staff can conveniently disassemble and assemble the tire, thereby improving the detection efficiency of the tire. By rotating the tire, three groups of industrial cameras can be conveniently used to detect the outer surface and inner surface of the tire, thereby further improving the detection effect of the tire. By setting the extrusion component, the tread of the tire detection area can be squeezed, thereby improving the crack appearance effect on the tire. The extrusion method includes squeezing from the inside to the outside and squeezing from the outside to the inside, thereby further improving the detection effect of the inside and outside of the tire.

[0021] 2. The present invention adopts a bracket to be fixedly connected with the bidirectional telescopic rod through a sleeve, thereby ensuring the stability of the two third pressure rollers located inside the tire. The driving rod is fixedly connected with another sliding block, so that when the sliding block moves left and right, it can drive the two connecting rods to move in a fan shape, and then drive the two third pressure rollers to move relative to or apart. Through the movement of the two third pressure rollers away from each other, the two inner side surfaces of the tire can be squeezed, so that the two sidewalls of the tire bulge outward, thereby facilitating the two first industrial cameras to better capture cracks on the side surfaces of the tire. The system has the function of self-expansion or contraction, and further improves the tire detection effect.

[0022] 3. The present invention connects the inclined surface of the triangular frame with the bottom of the inner wall of the movable frame in a sliding manner, so that when the sliding frame moves forward and backward, the movable frame can be driven to move up and down by the inclined surface, and the up and down movement of the movable frame can further drive the pull rod to move up and down, thereby forming an expansion or contraction drive of the inner extrusion piece, and fully utilizing the driving force of the crown extrusion piece. Not only does it not need to set up a separate electric drive source for driving, which improves the energy saving and environmental protection of the equipment, but it can also extrude the inner and outer sides of the tire simultaneously, thereby improving the visual inspection effect of the subsequent visual inspection component. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 For the present invention Figure 1 The rear view of the structure;

[0025] Figure 3 For the present invention Figure 1 A cross-sectional schematic diagram of

[0026] Figure 4 For the present invention Figure 1 The structural diagram of the workbench in the middle;

[0027] Figure 5 For the present invention Figure 1 Schematic diagram of the structure of the extrusion component;

[0028] Figure 6 For the present invention Figure 5 A cross-sectional schematic diagram of

[0029] Figure 7 For the present invention Figure 6 Schematic diagram of the split upper and lower hubs;

[0030] Figure 8 For the present invention Figure 7 Transmission schematic diagram of the inner extrusion part and the transmission part.

[0031] In the figure: 1. Workbench; 2. Tire; 3. First industrial camera; 4. Second industrial camera; 5. Third industrial camera; 6. Gantry; 7. Hydraulic cylinder; 8. Fixed plate; 9. Rotating plate;

[0032] 10. Upper wheel hub; 101. Air injection pipe; 102. Pressure gauge;

[0033] 11. Lower wheel hub;

[0034] 12. Extrusion assembly; 121. Crown extrusion piece; 1211. Sliding frame; 1212. U-shaped frame; 1213. First pressure roller; 122. Inner extrusion piece; 1221. Sleeve; 1222. Triangular plate; 1223. Sliding block; 1224. Second pressure roller; 1225. Third pressure roller; 1226. Casing; 1227. Two-way telescopic rod; 1228. Driving rod; 1229. Connecting rod; 123. Transmission member; 1231. Movable frame; 1232. Pull rod; 1233. Tilt frame; 1234. Triangular frame; 124. Electric telescopic rod;

[0035] 13. Motor. DETAILED DESCRIPTION

[0036] 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.

[0037] Embodiment 1:

[0038] See attached Figure 1-8 A tire defect detection device based on machine vision comprises a workbench 1, a visual detection component for detecting a tire 2 is arranged on the top of the workbench 1, and the visual detection component comprises a first industrial camera 3 for detecting the sidewall of the tire 2, a second industrial camera 4 for detecting the outer crown of the tire 2, and a third industrial camera 5 for detecting the inner crown of the tire 2;

[0039] The two first industrial cameras 3 are used to detect the two sidewalls of the tire 2, the second industrial camera 4 is used to detect the crown of the tire 2, and the third industrial camera 5 is used to detect the inner crown of the tire 2, thereby increasing the detection range of the tire 2 and further improving the detection effect of the tire 2. Light sources are set on the three groups of industrial cameras to improve the clarity of their visual detection;

[0040] A gantry 6 is fixedly connected to the top of the workbench 1, and two hydraulic cylinders 7 are fixedly connected to the bottom of the gantry 6. A fixed plate 8 is fixedly connected between the telescopic ends of the two hydraulic cylinders 7. A rotating disk 9 is rotatably connected to the top of the workbench 1. A hub member for assembling the tire 2 is provided between the rotating disk 9 and the fixed plate 8. The hub member includes an upper hub 10 rotatably connected to the bottom of the fixed plate 8 and a lower hub 11 fixed to the top of the rotating disk 9. An extrusion assembly 12 for extruding the tire 2 is provided on the workbench 1. A motor 13 for rotating and driving the upper hub 10 is fixedly connected to the top of the fixed plate 8.

[0041] The two hydraulic cylinders 7 are connected to an external power supply and a control switch, and are used to drive the fixing plate 8 to move up and down. The upper wheel hub 10 can be driven to move up and down by the up and down movement of the fixing plate 8, so as to facilitate the assembly of the tire 2 to be inspected in cooperation with the lower wheel hub 11. The wheel hub part is composed of the upper wheel hub 10 and the lower wheel hub 11, so that the staff can conveniently disassemble and assemble the tire 2, thereby improving the inspection efficiency of the tire 2;

[0042] The motor 13 is connected to an external power source and a control switch, and is used to drive the upper wheel hub 10 to rotate. It is installed between the upper wheel hub 10 and the lower wheel hub 11 through the tire 2, so that the three are integrated into one. The rotation of the upper wheel hub 10 can drive the tire 2 to rotate. The rotation of the tire 2 can facilitate the three groups of industrial cameras to detect the outer surface and inner surface of the tire 2, further improving the detection effect of the tire 2. Through the setting of the extrusion component 12, the tread of the tire 2 detection area can be squeezed, thereby improving the crack appearance effect on the tire 2. The extrusion method includes squeezing from the inside to the outside and squeezing from the outside to the inside, which further improves the detection effect of the inside and outside of the tire 2.

[0043] See attached Figures 1 to 4 , Figure 7 and Figure 8 There are two first industrial cameras 3, which are fixed to one side of the top of the workbench 1 through a U-shaped bracket, and the collection ends of the two first industrial cameras 3 are facing the two sidewalls of the tire 2. The second industrial camera 4 is fixed to the other side of the top of the workbench 1 through a support frame, and the third industrial camera 5 is set inside the hub member;

[0044] By setting up two first industrial cameras 3, it is used to detect the two sidewalls of the tire 2, by setting up the second industrial camera 4, it is used to detect the crown of the tire 2, and by setting up the third industrial camera 5, it is used to detect the inner crown of the tire 2, thereby increasing the detection range of the tire 2 and further improving the detection effect of the tire 2.

[0045] See attached Figure 7 The top of the upper hub 10 is fixedly connected to an air injection pipe 101, and a switch valve and a pressure gauge 102 are respectively installed on the air injection pipe 101;

[0046] The setting of the air injection pipe 101 facilitates connection with an external air pump, and gas is injected into the assembled tire 2 through the air injection pipe 101 to expand the tire 2, thereby facilitating the industrial camera to perform video monitoring. The setting of the pressure gauge 102 is used to detect the air pressure inside the tire 2.

[0047] See attached Figures 5 to 8The extrusion assembly 12 includes a crown extrusion piece 121 and an inner extrusion piece 122 arranged on the workbench 1. The crown extrusion piece 121 is located on the back of the hub piece, and the extrusion end of the inner extrusion piece 122 is located inside the hub piece. The crown extrusion piece 121 and the inner extrusion piece 122 are connected by a transmission piece 123. The top of the workbench 1 is fixedly connected to an electric telescopic rod 124 for longitudinally driving the crown extrusion piece 121 through a bracket.

[0048] The electric telescopic rod 124 is connected to the external power supply through the crown extrusion piece 121, which is used to extrude the crown extrusion piece 121, so that the crown extrusion piece 121 can squeeze the crown of the tire 2, so that the tread of this area bulges inward, thereby facilitating the third industrial camera 5 to detect cracks on the inner side of the tire 2. When the crown extrusion piece 121 squeezes the tire 2, the transmission piece 123 can be used to drive the inner extrusion piece 122, so that the inner extrusion piece 122 squeezes the tire 2 from the inside to the outside, so that the tread of this area bulges outward, thereby facilitating the two first industrial cameras 3 to detect the two sidewalls of the tire 2, and facilitating the second industrial camera 4 to detect the crown of the tire 2, further improving the detection effect and detection range of the tire 2.

[0049] See attached Figure 7 The crown extrusion member 121 includes a sliding frame 1211 slidably connected to the top of the workbench 1, a U-shaped frame 1212 is fixedly connected to the top of the sliding frame 1211, and a first pressing roller 1213 is rotatably connected inside the U-shaped frame 1212;

[0050] By starting the electric telescopic rod 124, the sliding frame 1211 can be driven to slide back and forth, and the sliding of the sliding frame 1211 can drive the first pressure roller 1213 to move back and forth through the U-shaped frame 1212. When the first pressure roller 1213 moves toward the position of the tire 2, the tire 2 can be squeezed by the first pressure roller 1213, so that the tread of this area bulges inward, which makes it easier to capture the cracks of the inner tire crown through the third industrial camera 5, thereby forming an inspection work on the inside of the tire 2.

[0051] See attached Figures 7 and 8The inner extrusion member 122 includes a sleeve 1221 fixed on the workbench 1, and the top of the sleeve 1221 extends between the upper hub 10 and the lower hub 11, the sleeve 1221 is sealed and connected to the lower hub 11 through a sealing sleeve, and the outer surface of the top of the sleeve 1221 is fixedly connected with a triangular plate 1222, the third industrial camera 5 is fixedly connected with the longitudinal end of the triangular plate 1222, and both sides of the top of the triangular plate 1222 are slidably connected with sliding blocks 1223; one side of one of the sliding blocks 1223 is rotatably connected with a second pressing roller 1224 for extruding the inner tire crown through a connecting frame, and one side of the other sliding block 1223 is provided with two third pressing rollers 1225 for extruding the inner tire side;

[0052] By connecting the second pressure roller 1224 and the third pressure roller 1225 to the two sliding blocks 1223 respectively, the two sliding blocks 1223 can move in relative directions, thereby forming the contraction of the second pressure roller 1224 and the third pressure roller 1225, thereby facilitating the installation or disassembly of the tire 2; conversely, by the movement of the two sliding blocks 1223 away from each other, the second pressure roller 1224 and the third pressure roller 1225 can be driven to expand, thereby squeezing the inner crown and two inner side surfaces of the tire 2, so that the crown and sidewalls of the tire 2 are convex, which facilitates the protrusion of cracks on the outer surface of the tire 2, and improves the detection effect of the first industrial camera 3 and the second industrial camera 4 on the outside of the tire 2.

[0053] Embodiment 2: Based on embodiment 1, the difference is that;

[0054] See attached Figures 6 to 8 A sleeve 1226 is fixedly connected to one side of the top of the triangular plate 1222, and a bidirectional telescopic rod 1227 is fixedly connected to the outer surface of the sleeve 1226 through a bracket. The two third pressing rollers 1225 are rotatably connected to the two telescopic ends of the bidirectional telescopic rod 1227 through a U-shaped block. A driving rod 1228 is inserted into the sleeve 1226, and one end of the driving rod 1228 is fixedly connected to another sliding block 1223. The other end of the driving rod 1228 is hinged to two inclined connecting rods 1229, and one end of the two connecting rods 1229 is respectively hinged to the two U-shaped blocks;

[0055] The sleeve 1226 is fixedly connected with the two-way telescopic rod 1227 by a bracket, thereby ensuring the stability of the two third pressure rollers 1225 inside the tire 2. The driving rod 1228 is fixedly connected with another sliding block 1223, so that when the sliding block 1223 moves left and right, it can drive the two connecting rods 1229 to move in a fan shape, and then drive the two third pressure rollers 1225 to move relative to or away from each other. Through the movement of the two third pressure rollers 1225 away from each other, the two inner side surfaces of the tire 2 can be squeezed, so that the two sidewalls of the tire 2 bulge outward, thereby facilitating the two first industrial cameras 3 to better capture the cracks on the sidewalls of the tire 2, thereby improving the tire 2 detection effect;

[0056] The bidirectional telescopic rod 1227 is composed of a telescopic sleeve and two telescopic rods. Both telescopic rods slide inside the telescopic sleeve, thereby facilitating the expansion or contraction movement of the two third pressing rollers 1225 .

[0057] Embodiment 3: Based on embodiment 1, the difference is that;

[0058] See attached Figures 6 to 8 The transmission member 123 includes a lifting frame slidably connected to a movable frame 1231 at the bottom of the workbench 1, a pull rod 1232 is fixedly connected to the top of the movable frame 1231, the top of the pull rod 1232 extends to the inside of the hub member, and the top of the pull rod 1232 is hinged with two tilting frames 1233, and the bottom ends of the two tilting frames 1233 are respectively hinged to the two sliding blocks 1223;

[0059] The up and down movement of the pull rod 1232 can drive the two inclined tilting frames 1233 to move in a fan shape, thereby synchronously driving the two sliding blocks 1223 to move relative to or apart from each other, thereby driving the second pressing roller 1224 and the third pressing roller 1225 to be extended or retracted;

[0060] The pull rod 1232 extends through the sleeve 1221 to the inside of the hub member and is sealed with a sealing sleeve to prevent the gas inside the hub member from being lost through the sleeve 1221;

[0061] A triangular frame 1234 is fixedly connected to one side of the bottom of the sliding frame 1211 through a fixed frame, and an inclined surface of the triangular frame 1234 is slidably connected to the bottom of the inner wall of the movable frame 1231;

[0062] The inclined surface of the triangular frame 1234 is slidably connected with the bottom of the inner wall of the movable frame 1231, so that when the sliding frame 1211 moves forward and backward, the movable frame 1231 can be driven to move up and down through the inclined surface, and the movable frame 1231 can move up and down, thereby driving the pull rod 1232 to move up and down, thereby forming an expansion or contraction drive of the inner extrusion piece 122, thereby forming an extrusion work on the inner side of the tire 2, and fully utilizing the driving force of the crown extrusion piece 121. Not only does it not need to set up a separate electric drive source for driving, thereby improving the energy saving and environmental protection of the equipment, but it can also simultaneously extrude the inner and outer sides of the tire 2, thereby improving the visual inspection effect of the subsequent visual inspection components.

[0063] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0064] 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 tire defect detection device based on machine vision, comprising a workbench (1), wherein a visual detection component for detecting a tire (2) is arranged on the top of the workbench (1), and characterized in that: The visual inspection component comprises a first industrial camera (3) for inspecting the sidewall of the tire (2), a second industrial camera (4) for inspecting the outer crown of the tire (2), and a third industrial camera (5) for inspecting the inner crown of the tire (2); The top of the workbench (1) is fixedly connected to a gantry (6), and the bottom of the gantry (6) is fixedly connected to two hydraulic cylinders (7); a fixed plate (8) is fixedly connected between the telescopic ends of the two hydraulic cylinders (7); the top of the workbench (1) is rotatably connected to a rotating disk (9); a wheel hub component for assembling the tire (2) is provided between the rotating disk (9) and the fixed plate (8); the wheel hub component comprises an upper wheel hub (10) rotatably connected to the bottom of the fixed plate (8) and a lower wheel hub (11) fixed to the top of the rotating disk (9); an extrusion assembly (12) for extruding the tire (2) is provided on the workbench (1); and a motor (13) for rotationally driving the upper wheel hub (10) is fixedly connected to the top of the fixed plate (8); The extrusion assembly (12) comprises a crown extrusion piece (121) and an inner extrusion piece (122) arranged on a workbench (1); the crown extrusion piece (121) is located on the back of the wheel hub piece; an extrusion end of the inner extrusion piece (122) is located inside the wheel hub piece; the crown extrusion piece (121) and the inner extrusion piece (122) are connected in transmission via a transmission piece (123); and an electric telescopic rod (124) for longitudinally driving the crown extrusion piece (121) is fixedly connected to the top of the workbench (1) via a bracket; The tire crown extrusion component (121) comprises a sliding frame (1211) slidably connected to the top of the workbench (1), the top of the sliding frame (1211) is fixedly connected to a U-shaped frame (1212), and the interior of the U-shaped frame (1212) is rotatably connected to a first pressing roller (1213); The inner extrusion member (122) comprises a sleeve (1221) fixed on the workbench (1), and the top end of the sleeve (1221) extends between the upper hub (10) and the lower hub (11), the sleeve (1221) is sealedly connected to the lower hub (11) via a sealing sleeve, the outer surface of the top end of the sleeve (1221) is fixedly connected to a triangle plate (1222), the third industrial camera (5) is fixedly connected to the longitudinal end of the triangle plate (1222), and sliding blocks (1223) are slidably connected to both sides of the top of the triangle plate (1222); One side of one of the sliding blocks (1223) is rotatably connected to a second pressing roller (1224) for extruding the inner tire crown via a connecting frame, and one side of the other sliding block (1223) is provided with two third pressing rollers (1225) for extruding the inner tire side.

2. The tire defect detection device based on machine vision according to claim 1, characterized in that: The first industrial cameras (3) are two and are fixed to one side of the top of the workbench (1) via a U-shaped bracket, and the collection ends of the two first industrial cameras (3) are aligned with the two sidewalls of the tire (2). The second industrial camera (4) is fixed to the other side of the top of the workbench (1) via a support frame, and the third industrial camera (5) is arranged inside the wheel hub.

3. The tire defect detection device based on machine vision according to claim 1, characterized in that: The top of the upper hub (10) is fixedly connected to an air injection pipe (101), and an on-off valve and a pressure gauge (102) are respectively installed on the air injection pipe (101).

4. The tire defect detection device based on machine vision according to claim 1, characterized in that: A sleeve (1226) is fixedly connected to one side of the top of the triangular plate (1222); the outer surface of the sleeve (1226) is fixedly connected to a bidirectional telescopic rod (1227) via a bracket; the two third pressing rollers (1225) are rotatably connected to the two telescopic ends of the bidirectional telescopic rod (1227) via a U-shaped block; a driving rod (1228) is inserted into the sleeve (1226); one end of the driving rod (1228) is fixedly connected to another sliding block (1223); the other end of the driving rod (1228) is hinged to two inclined connecting rods (1229); one end of the two connecting rods (1229) is respectively hinged to the two U-shaped blocks.

5. The tire defect detection device based on machine vision according to claim 1, characterized in that: The transmission member (123) comprises a lifting frame slidably connected to a movable frame (1231) at the bottom of the workbench (1); a pull rod (1232) is fixedly connected to the top of the movable frame (1231); the top of the pull rod (1232) extends to the inside of the hub member; the top of the pull rod (1232) is hinged with two tilting frames (1233); the bottom ends of the two tilting frames (1233) are respectively hinged to two sliding blocks (1223); One side of the bottom of the sliding frame (1211) is fixedly connected to a triangular frame (1234) via a fixed frame, and the inclined surface of the triangular frame (1234) is slidably connected to the bottom of the inner wall of the movable frame (1231).

Images