A multi-directional visual inspection device and its orientation transformation method

Abstract

The present invention discloses a multi-directional visual inspection device and an orientation change method thereof, comprising a box body, a box door movably installed on one side of the front end of the box body, a detection chamber opened inside the box body, a first electric slide rail provided on the upper end of the detection chamber, a first slider installed on the first electric slide rail, a first visual inspection device installed on the lower end of the first slider, a second electric slide rail provided on one side of the detection chamber, a second slider installed on the second electric slide rail, a second visual inspection device installed on one end of the second slider, a detection table provided on the lower end of the detection chamber, a first electromagnet installed at the middle position of the upper end of the detection table. The multi-directional visual inspection device can more fully perform visual inspection of workpieces, and does not require manual adjustment throughout the entire process, making it more convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of visual inspection, and in particular to a multi-directional visual inspection device and an orientation transformation method thereof. Background Art

[0002] Visual inspection is the use of machines to replace human eyes for measurement and judgment. Visual inspection refers to the conversion of captured targets into image signals through machine vision products, which are transmitted to a dedicated image processing system. Based on pixel distribution, brightness, color and other information, these signals are converted into digital signals. The image system performs various operations on these signals to extract the characteristics of the target, and then controls the operation of equipment on site based on the judgment results. It is a valuable mechanism for production, assembly or packaging, and it has immeasurable value in detecting defects and preventing defective products from being delivered to consumers.

[0003] For example, the Chinese authorized patent with announcement number CN212964653U, "A multi-angle visual inspection device that is easy to adjust", includes a bottom transverse slide rail group, a longitudinal slide rail group installed on the bottom transverse slide rail group through a slider, and a visual inspection device installed on the longitudinal slide rail group through a slider. The visual inspection device includes a fixed plate, a mounting plate, a sliding plate and a detection camera.

[0004] Although the above-mentioned existing technology can perform multi-angle detection on the workpiece, the detection angle of the device is limited. For example, there is a lack of detection of the lower end of the workpiece when it is placed, resulting in incomplete detection. In addition, the device requires manual adjustment, which increases the labor intensity to a certain extent and is not conducive to daily use. Therefore, it does not meet the existing needs. In this regard, we propose a multi-directional detection visual inspection device and its orientation transformation method. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-directional detection visual inspection device and an orientation transformation method thereof, so as to solve the problems of incomplete detection and inconvenient use of the visual inspection device proposed in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-directional visual inspection device and an orientation change method thereof, comprising a box body, a box door movably installed on one side of the front end of the box body, an inspection chamber opened inside the box body, a first electric slide rail provided at the upper end of the interior of the inspection chamber, a first slider installed on the first electric slide rail, a first visual inspection device installed at the lower end of the first slider, a second electric slide rail provided on one side of the interior of the inspection chamber, a second slider installed on the second electric slide rail, a second visual inspection device installed at one end of the second slider, an inspection table provided at the lower end of the interior of the inspection chamber, and a first electromagnet installed at the middle position of the upper end of the interior of the inspection table;

[0007] It also includes a fixed box, which is arranged on one side above the detection table, a rotating block is welded at the middle position of one side of the fixed box, the rotating block is rotatably connected to the middle of the detection chamber through a second rotating shaft, a double-threaded transmission rod is rotatably provided inside the fixed box, both ends of the outer side of the double-threaded transmission rod are threadedly connected to a threaded sleeve, a clamping block is welded on one side of the threaded sleeve, one end of the clamping block passes through and extends to the outside of the fixed box, and the clamping blocks are slidably matched with the fixed box, an electric telescopic rod is installed on one side above the rotating block, the output end of the electric telescopic rod is connected to the rotating block by a connecting rod, and the rotating block is rotatably connected to the electric telescopic rod and the rotating block;

[0008] It also includes a transmission cavity, which is arranged in the middle position of one side of the interior of the box body. A group of sliding rods are welded to the upper and lower ends of the interior of the transmission cavity, and each group of sliding rods is welded with two. A moving block is provided inside the transmission cavity, and the sliding rods pass through the moving blocks, and the sliding rods are slidably matched with the moving blocks. A moving rod is glued to the middle position of one side of the moving block, and one end of the moving rod passes through and extends to the outside of the transmission cavity, and the moving rod is slidably matched with the transmission cavity.

[0009] It also includes a first rotating shaft, which is fixedly arranged at the middle position of the lower end of the detection platform. A first servo motor is arranged below the first rotating shaft, and the output end of the first servo motor is connected to the first rotating shaft through a coupling.

[0010] Preferably, a limiting block is welded on one side of the threaded sleeve, and a limiting rod is welded on one side of the double-threaded transmission rod. The limiting blocks are penetrated by the limiting rod, and the limiting blocks are slidably matched with the limiting rod.

[0011] Preferably, one end of the clamping block located outside the fixing box is glued with a clamping plate, and the inner side of the clamping plate is glued and fixed with a rubber pad.

[0012] Preferably, a bearing is provided on the outer wall of the detection platform, the outer wall of the bearing is fixedly connected to the inner wall of the detection chamber, and the inner wall of the bearing is fixedly connected to the outer wall of the detection platform, and an annular rolling groove is provided at the middle position between the lower end of the detection platform and the lower end of the interior of the detection chamber, and four balls are arranged inside the annular rolling groove and are evenly distributed in a ring shape.

[0013] Preferably, a return spring is sleeved on the outside of the sliding rod, one end of the return spring is connected to the transmission cavity, and the other end of the return spring is connected to the moving block.

[0014] Preferably, a second servo motor is provided at the rear side of the interior of the fixing box, and the output end of the second servo motor is connected to the double-threaded transmission rod via a coupling.

[0015] Preferably, a second electromagnet is installed at one end of the moving rod located outside the transmission cavity.

[0016] Preferably, four equally spaced fill lights are installed at the rear end of the detection chamber.

[0017] Preferably, a transparent glass window is provided at the middle position of the front end of the door.

[0018] A method for changing the orientation of a visual inspection device for multi-orientation inspection comprises the following steps:

[0019] Step 1: Open the box door, place the workpiece to be inspected in the middle position of the upper end of the inspection table, energize the first electromagnet 18 to adsorb and fix the placed workpiece, close the box door, start the first electric slide and the second electric slide, the first electric slide drives the first slider to make the first visual inspection device move horizontally and linearly to inspect the upper end surface of the workpiece, the second electric slide drives the second slider to make the second visual inspection device move vertically up and down to inspect one side of the workpiece, and at the same time start the fill light for fill light, and observe the inspection room through the transparent glass window;

[0020] Step 2: When inspecting the workpiece, the first servo motor is started, and the first rotating shaft is rotated through the transmission of the coupling. The first rotating shaft drives the inspection table to rotate synchronously, causing the placed workpiece to rotate, so that the second visual inspection device can inspect the workpiece from multiple sides;

[0021] Step 3: Start the electric telescopic rod and move the output end of the electric telescopic rod toward the workpiece. Through the connection of the connecting rod, the rotating block rotates around the second rotating axis, and the fixed box at one end of the rotating block moves above the inspection table.

[0022] Step 4: After the fixed box moves to the top of the inspection table, the second servo motor is started. The double-threaded transmission rod rotates synchronously through the transmission of the coupling, and the double-threaded transmission rod drives the threaded sleeve to rotate synchronously. The threaded sleeve drives the limit block to rotate synchronously. Since the limit block and the limit rod slide together, the limit block will be axially limited, so that the threaded sleeve is synchronously limited in the axial direction. The rotation of the two threaded sleeves will be converted into opposite or opposite horizontal linear movement. The movement of the threaded sleeve drives the clamping block to move towards each other, and the clamping block drives the clamping plate to clamp and fix the workpiece;

[0023] Step 5: After the clamping plate clamps the workpiece, the electric telescopic rod is started again, causing the output end of the electric telescopic rod to move away from the workpiece. The rotating block rotates around the second rotating axis through the connection of the connecting rod. The rotating block drives the fixed box to move directly above the second rotating axis and simultaneously drives the workpiece to rotate. At this time, the first visual inspection device and the second visual inspection device are used to inspect the workpiece at different angles.

[0024] Step 6: After the fixed box drives the workpiece to move to the top of the second rotating shaft, the workpiece will contact and squeeze the second electromagnet. The second electromagnet will drive the moving block to squeeze the reset spring through the connection of the moving rod. The elastic action of the reset spring will generate an opposite force on the moving block. The moving block will drive the moving rod to make the second electromagnet fit the workpiece, and the second electromagnet will be energized to adsorb and fix the workpiece. At this time, the lower end of the workpiece is inspected by moving the second visual inspection device upward.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention fixes a first rotating shaft at the lower end of the detection table. By starting the first servo motor, the first rotating shaft can drive the detection table to rotate. The detection table can drive the placed workpiece to rotate 360 ​​degrees, so that the second visual inspection device can fully inspect the horizontal surface of the workpiece. At the same time, starting the first electromagnet can generate suction to adsorb the workpiece placed above, which can avoid the movement of the workpiece during rotation and is easy to use.

[0027] 2. The present invention provides a fixed box on one side above the inspection table. When inspecting the workpiece, the second servo motor in the fixed box can be started to enable the two clamping plates to clamp the workpiece, and by starting the electric telescopic rod, under the connection of the connecting rod and the rotation of the second rotating shaft, the rotating block can drive the fixed box to rotate ninety degrees with the second rotating shaft as the rotation point, so that the lower end of the inspection table can be detected by the second visual inspection device on one side. At the same time, by changing the clamping position of the clamping plate on the workpiece and the rotation angle of the fixed box driven by the rotating block, the workpiece can be inspected at more angles, making the visual inspection of the workpiece more sufficient, and no manual adjustment is required throughout the process, making it more convenient to use.

[0028] 3. The present invention provides a transmission cavity on one side of the box body. When the rotating block drives the fixed box to rotate ninety degrees, the workpiece will contact the second electromagnet, so that suction can be generated by activating the second electromagnet, and the workpiece can be adsorbed and fixed, thereby avoiding the risk of the workpiece falling. When the thickness of the detected workpiece is different, the workpiece squeezes the second electromagnet, and the transmission of the moving rod can make the moving block compress the reset spring, so that the elastic recovery effect of the reset spring can make the second electromagnet fully fit the workpiece, thereby adapting to workpieces of different thicknesses, increasing practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of the overall structure of the present invention;

[0030] Figure 2 It is a front view schematic diagram of the internal structure of the present invention;

[0031] Figure 3 It is a top view schematic diagram of the internal structure of the present invention;

[0032] Figure 4 It is a schematic top view of the internal structure of the transmission cavity of the present invention;

[0033] Figure 5 For the present invention Figure 2 A partial enlarged view of area A in the middle;

[0034] Figure 6 For the present invention Figure 2 A partial enlarged view of area B in the middle;

[0035] Figure 7 For the present invention Figure 2 A partial enlarged view of the middle C area;

[0036] Figure 8 For the present invention Figure 3 A partial enlarged view of the D area in the middle.

[0037] In the figure: 1. box body; 2. box door; 3. transparent glass window; 4. inspection room; 5. fill light; 6. first electric slide; 7. first slider; 8. first visual inspection device; 9. second electric slide; 10. second slider; 11. second visual inspection device; 12. bearing; 13. inspection table; 14. first rotating shaft; 15. first servo motor; 16. ball bearing; 17. annular rolling groove; 18. first electromagnet; 19. fixing box; 20. second servo motor; 21. double-thread transmission rod; 22. threaded sleeve; 23. limit block; 24. limit rod; 25. clamping block; 26. clamping plate; 27. rubber pad; 28. rotating block; 29. ​​second rotating shaft; 30. electric telescopic rod; 31. connecting rod; 32. transmission chamber; 33. moving block; 34. slide rod; 35. return spring; 36. moving rod; 37. second electromagnet. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] See also Figure 1-8, the present invention provides an embodiment: a multi-directional detection visual inspection device and its orientation change method, including a box body 1, a box door 2 is movably installed on one side of the front end of the box body 1, an inspection chamber 4 is opened inside the box body 1, a first electric slide rail 6 is provided at the upper end of the inspection chamber 4, a first slider 7 is installed on the first electric slide rail 6, a first visual inspection device 8 is installed at the lower end of the first slider 7, a second electric slide rail 9 is provided on one side of the inspection chamber 4, a second slider 10 is installed on the second electric slide rail 9, a second visual inspection device 11 is installed at one end of the second slider 10, an inspection table 13 is provided at the lower end of the inspection chamber 4, and a first electromagnet 18 is installed at the middle position of the upper end of the inspection table 13;

[0040] It also includes a fixed box 19, which is arranged on one side above the detection table 13. A rotating block 28 is welded at the middle position of one side of the fixed box 19. The rotating block 28 is rotatably connected to the middle of the detection chamber 4 through a second rotating shaft 29. A double-threaded transmission rod 21 is provided for internal rotation of the fixed box 19. Both ends of the outer side of the double-threaded transmission rod 21 are threadedly connected to a threaded sleeve 22. A clamping block 25 is welded on one side of the threaded sleeve 22. One end of the clamping block 25 passes through and extends to the outside of the fixed box 19, and the clamping blocks 25 are slidably matched with the fixed box 19. An electric telescopic rod 30 is installed on one side above the rotating block 28. The output end of the electric telescopic rod 30 is connected to the rotating block 28 by a connecting rod 31, and the rotating block 28 is rotatably connected to the electric telescopic rod 30 and the rotating block 28.

[0041] It also includes a transmission cavity 32, which is arranged in the middle position of one side of the interior of the box body 1. A group of sliding rods 34 are welded to the upper and lower ends of the interior of the transmission cavity 32, and each group of sliding rods 34 is welded with two. A moving block 33 is provided inside the transmission cavity 32, and the sliding rods 34 pass through the moving block 33, and the sliding rods 34 are slidably matched with the moving block 33. A moving rod 36 is glued to the middle position of one side of the moving block 33, and one end of the moving rod 36 passes through and extends to the outside of the transmission cavity 32, and the moving rod 36 is slidably matched with the transmission cavity 32;

[0042] It also includes a first rotating shaft 14, which is fixedly arranged at the middle position of the lower end of the detection platform 13. A first servo motor 15 is arranged below the first rotating shaft 14, and the output end of the first servo motor 15 is connected to the first rotating shaft 14 through a coupling.

[0043] During use, the user can start the second servo motor 20 to make the clamping plate 26 drive the rubber pad 27 to clamp and fix the workpiece. After fixing the workpiece, the electric telescopic rod 30 is started to move the output end of the electric telescopic rod 30 away from the workpiece. Under the connection of the connecting rod 31, the rotating block 28 can drive the fixing box 19 to move around the second rotating shaft 29 to directly above the second rotating shaft 29. At this time, the workpiece will rotate synchronously, and different angles of the workpiece can be inspected by the first visual inspection device 8 and the second visual inspection device 11. After the workpiece is driven to move directly above the second rotating shaft 29, the lower end of the workpiece can be inspected by moving the second visual inspection device 11 upward, thereby making the visual inspection of the workpiece more sufficient, and no manual adjustment is required throughout the process, making it more convenient to use.

[0044] See also Figure 5 and Figure 8 A limiting block 23 is welded on one side of the threaded sleeve 22, and a limiting rod 24 is welded on one side of the double-threaded transmission rod 21. The limiting blocks 23 are penetrated by the limiting rod 24, and the limiting blocks 23 are slidably matched with the limiting rod 24. The limiting rod 24 can limit the limiting block 23 axially and can limit the threaded sleeve 22 synchronously, so that the rotation of the two threaded sleeves 22 is converted into opposite or opposite horizontal linear movement. The clamping plate 26 can clamp and fix the workpiece through the drive of the threaded sleeve 22.

[0045] See also Figure 2 and Figure 3 The clamping block 25 is glued to one end of the fixing box 19 with a clamping plate 26, and the inner side of the clamping plate 26 is glued and fixed with a rubber pad 27. The rubber pad 27 is made of rubber material, so that the wear of the workpiece can be avoided when the workpiece is clamped and fixed.

[0046] See also Figure 2 、 Figure 3 and Figure 6 A bearing 12 is provided on the outer wall of the detection platform 13. The outer wall of the bearing 12 is fixedly connected to the inner wall of the detection chamber 4, and the inner wall of the bearing 12 is fixedly connected to the outer wall of the detection platform 13. An annular rolling groove 17 is provided at the middle position between the lower end of the detection platform 13 and the lower end of the detection chamber 4. Four balls 16 with equal distances in a ring are provided inside the annular rolling groove 17. The setting of the bearing 12 and the ball 16 improves the stability of the detection platform 13 during rotation.

[0047] See also Figure 4 and Figure 7 The outside of the slide rod 34 is provided with a return spring 35, one end of the return spring 35 is connected to the transmission chamber 32, and the other end of the return spring 35 is connected to the moving block 33. The elastic action of the return spring 35 can drive the moving block 33 to make the second electromagnet 37 fit the workpiece better.

[0048] See also Figure 3 and Figure 8 A second servo motor 20 is provided on the rear side of the fixed box 19, and the output end of the second servo motor 20 is connected to the double-threaded transmission rod 21 through a coupling. The setting of the second servo motor 20 provides power for clamping the clamping plate 26, avoiding manual clamping and reducing the intensity of work.

[0049] See also Figure 2 、 Figure 3 and Figure 4 A second electromagnet 37 is installed at one end of the moving rod 36 located outside the transmission chamber 32. When the second electromagnet 37 is energized, it can adsorb and fix the workpiece to prevent the workpiece from falling.

[0050] See also Figure 2 and Figure 3 Four equally spaced fill lights 5 are installed at the rear end of the detection room 4. The setting of the fill lights 5 can provide fill light to improve the effect of detection and shooting.

[0051] See also Figure 1 A transparent glass window 3 is provided at the middle position of the front end of the door 2, and the user can observe the detection situation in the detection room 4 conveniently and quickly through the transparent glass window 3.

[0052] A method for changing the orientation of a visual inspection device for multi-orientation inspection comprises the following steps:

[0053] Step 1: Open the box door 2, place the workpiece to be inspected in the middle position of the upper end of the inspection table 13, energize the first electromagnet 18 to adsorb and fix the placed workpiece, close the box door 2, start the first electric slide 6 and the second electric slide 9, the first electric slide 6 drives the first slider 7 to make the first visual inspection device 8 move horizontally and linearly to inspect the upper end surface of the workpiece, the second electric slide 9 drives the second slider 10 to make the second visual inspection device 11 move vertically up and down to inspect one side of the workpiece, and at the same time start the fill light 5 for fill light, and observe the inspection room 4 through the transparent glass window 3;

[0054] Step 2: When inspecting the workpiece, the first servo motor 15 is started, and the first rotating shaft 14 is rotated through the transmission of the coupling. The first rotating shaft 14 drives the inspection table 13 to rotate synchronously, causing the placed workpiece to rotate, so that the second visual inspection device 11 can inspect the workpiece from multiple sides;

[0055] Step 3: Start the electric telescopic rod 30, so that the output end of the electric telescopic rod 30 moves toward the workpiece. Through the connection of the connecting rod 31, the rotating block 28 rotates around the second rotating shaft 29, and the fixed box 19 at one end of the rotating block 28 moves to the top of the inspection table 13;

[0056] Step 4: After the fixing box 19 moves to the top of the detection table 13, the second servo motor 20 is started. The double-threaded transmission rod 21 is rotated synchronously through the transmission of the coupling. The double-threaded transmission rod 21 will drive the threaded sleeve 22 to rotate synchronously, and the threaded sleeve 22 will drive the limit block 23 to rotate synchronously. Since the limit block 23 and the limit rod 24 slide together, the limit block 23 will be axially limited, so that the threaded sleeve 22 is synchronously limited in the axial direction. The rotation of the two threaded sleeves 22 will be converted into opposite or opposite horizontal linear movement. The movement of the threaded sleeve 22 drives the clamping block 25 to move toward each other, and the clamping block 25 drives the clamping plate 26 to clamp and fix the workpiece;

[0057] Step 5: After the clamping plate 26 clamps the workpiece, the electric telescopic rod 30 is activated again, causing the output end of the electric telescopic rod 30 to move away from the workpiece. The rotating block 28 rotates around the second rotating shaft 29 through the connection of the connecting rod 31. The rotating block 28 drives the fixed box 19 to move directly above the second rotating shaft 29 and simultaneously drives the workpiece to rotate. At this time, the first visual inspection device 8 and the second visual inspection device 11 are used to inspect different angles of the workpiece.

[0058] Step six: After the fixed box 19 drives the workpiece to move to the top of the second rotating shaft 29, the workpiece will contact and squeeze the second electromagnet 37. The second electromagnet 37 will drive the moving block 33 to squeeze the reset spring 35 through the connection of the moving rod 36. The elastic action of the reset spring 35 will generate an opposite force on the moving block 33. The moving block 33 will drive the moving rod 36 to make the second electromagnet 37 fit the workpiece, and the second electromagnet 37 will be energized to adsorb and fix the workpiece. At this time, the lower end of the workpiece is inspected by moving the second visual inspection device 11 upward.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A multi-directional visual inspection device, comprising a box body (1), a box door (2) movably mounted on one side of the front end of the box body (1), an inspection chamber (4) being provided inside the box body (1), a first electric slide rail (6) being provided at the upper end of the interior of the inspection chamber (4), a first slider (7) being mounted on the first electric slide rail (6), a first visual inspection device (8) being mounted at the lower end of the first slider (7), a second electric slide rail (9) being provided at one side of the interior of the inspection chamber (4), a second slider (10) being mounted on the second electric slide rail (9), a second visual inspection device (11) being mounted at one end of the second slider (10), an inspection table (13) being provided at the lower end of the interior of the inspection chamber (4), a first electromagnet (18) being mounted at the middle position of the upper end of the interior of the inspection table (13), and characterized in that: The invention also includes a fixed box (19), which is arranged on one side above the detection table (13); a rotating block (28) is welded at a middle position on one side of the fixed box (19); the rotating block (28) is rotatably connected to the middle of the detection chamber (4) through a second rotating shaft (29); a double-threaded transmission rod (21) is rotatably provided inside the fixed box (19); both ends of the outer side of the double-threaded transmission rod (21) are threadedly connected to threaded sleeves (22); a clamping block (25) is welded on one side of the threaded sleeve (22); one end of the clamping block (25) passes through and extends to the outside of the fixed box (19), and the clamping block (25) is slidably matched with the fixed box (19); an electric telescopic rod (30) is installed on one side above the rotating block (28); the output end of the electric telescopic rod (30) is connected to the rotating block (28) through a connecting rod (31), and the rotating block (28) is rotatably connected to the electric telescopic rod (30) and the rotating block (28); The invention also includes a transmission cavity (32) and is arranged at a middle position on one side of the interior of the box body (1). A group of slide bars (34) are welded to the upper and lower ends of the interior of the transmission cavity (32), and each group of slide bars (34) is welded with two. A moving block (33) is provided inside the transmission cavity (32). The slide bars (34) all penetrate the moving block (33), and the slide bars (34) all slide in cooperation with the moving block (33). A moving rod ( 36), one end of the moving rod (36) passes through and extends to the outside of the transmission chamber (32), and the moving rod (36) and the transmission chamber (32) are slidably matched, and the outside of the sliding rod (34) is provided with a return spring (35), one end of the return spring (35) is connected to the transmission chamber (32), and the other end of the return spring (35) is connected to the moving block (33), and the end of the moving rod (36) located outside the transmission chamber (32) is installed with a second electromagnet (37); It also includes a first rotating shaft (14), which is fixedly arranged at the middle position of the lower end of the detection platform (13); a first servo motor (15) is arranged below the first rotating shaft (14), and the output end of the first servo motor (15) is connected to the first rotating shaft (14) through a coupling.

2. The multi-directional visual inspection device according to claim 1, characterized in that: A limiting block (23) is welded on one side of the threaded sleeve (22), and a limiting rod (24) is welded on one side of the double-threaded transmission rod (21). The limiting blocks (23) are penetrated by the limiting rod (24), and the limiting blocks (23) are slidably matched with the limiting rod (24).

3. The multi-directional visual inspection device according to claim 1, characterized in that: One end of the clamping block (25) located outside the fixing box (19) is glued with a clamping plate (26), and the inner side of the clamping plate (26) is glued and fixed with a rubber pad (27).

4. The multi-directional visual inspection device according to claim 1, characterized in that: The outer wall of the detection platform (13) is provided with a bearing (12), the outer wall of the bearing (12) is fixedly connected to the inner wall of the detection chamber (4), and the inner wall of the bearing (12) is fixedly connected to the outer wall of the detection platform (13), and an annular rolling groove (17) is provided at a middle position between the lower end of the detection platform (13) and the lower end of the detection chamber (4), and four balls (16) are arranged in an annular shape and equidistantly distributed inside the annular rolling groove (17).

5. The multi-directional visual inspection device according to claim 1, characterized in that: A second servo motor (20) is provided on the rear side of the interior of the fixed box (19), and the output end of the second servo motor (20) is connected to the double-threaded transmission rod (21) through a coupling.

6. The multi-directional visual inspection device according to claim 1, characterized in that: Four equally spaced fill lights (5) are installed at the rear end of the detection chamber (4).

7. The multi-directional visual inspection device according to claim 1, characterized in that: A transparent glass window (3) is provided at the middle position of the front end of the box door (2).

8. The method for changing the orientation of a multi-orientation visual inspection device according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: open the box door (2), place the workpiece to be inspected in the middle position of the upper end of the inspection table (13), energize the first electromagnet 18 to adsorb and fix the placed workpiece, close the box door (2), start the first electric slide rail (6) and the second electric slide rail (9), the first electric slide rail (6) drives the first slider (7) to move the first visual inspection device (8) horizontally and linearly to inspect the upper end surface of the workpiece, the second electric slide rail (9) drives the second slider (10) to move the second visual inspection device (11) vertically up and down to inspect one side of the workpiece, and at the same time start the fill light (5) for fill light, and observe the inspection room (4) through the transparent glass window (3); Step 2: When inspecting the workpiece, the first servo motor (15) is started, and the first rotating shaft (14) is rotated through the transmission of the coupling. The first rotating shaft (14) drives the inspection table (13) to rotate synchronously, so that the placed workpiece rotates, and the second visual inspection device (11) can inspect the workpiece from multiple sides; Step 3: Start the electric telescopic rod (30) to move the output end of the electric telescopic rod (30) toward the workpiece, and through the connection of the connecting rod (31), the rotating block (28) rotates around the second rotating shaft (29), and the fixed box (19) at one end of the rotating block (28) moves to the top of the detection table (13); Step 4: After the fixing box (19) is moved to the top of the inspection table (13), the second servo motor (20) is started. The double-threaded transmission rod (21) is rotated synchronously through the transmission of the coupling. The double-threaded transmission rod (21) drives the threaded sleeve (22) to rotate synchronously. The threaded sleeve (22) drives the limit block (23) to rotate synchronously. Since the limit block (23) and the limit rod (24) are slidably matched, the limit block (23) is axially limited, so that the threaded sleeve (22) is synchronously limited in the axial direction. The rotation of the two threaded sleeves (22) is converted into opposite or opposite horizontal linear movement. The movement of the threaded sleeve (22) drives the clamping block (25) to move toward each other. The clamping block (25) drives the clamping plate (26) to clamp and fix the workpiece; Step 5: After the clamping plate (26) clamps and fixes the workpiece, the electric telescopic rod (30) is started again, so that the output end of the electric telescopic rod (30) moves in a direction away from the workpiece, and the rotating block (28) rotates around the second rotating shaft (29) through the connection of the connecting rod (31). The rotating block (28) drives the fixed box (19) to move to the top of the second rotating shaft (29) and drives the workpiece to rotate synchronously. At this time, different angles of the workpiece are detected by the first visual detection device (8) and the second visual detection device (11); Step 6: After the fixed box (19) drives the workpiece to move to the top of the second rotating shaft (29), the workpiece will contact and squeeze the second electromagnet (37). The second electromagnet (37) will drive the moving block (33) to squeeze the return spring (35) through the connection of the moving rod (36). The elastic action of the return spring (35) will generate an opposite force on the moving block (33). The moving block (33) will drive the moving rod (36) to make the second electromagnet (37) fit the workpiece, and the second electromagnet (37) will be energized to adsorb and fix the workpiece. At this time, the lower end of the workpiece is inspected by moving the second visual inspection device (11) upward.

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