An on-line visual inspection device for food filling

Abstract

This invention relates to an online visual inspection device for food filling, belonging to the field of visual inspection technology. It includes a conveyor line and a visual camera. An inspection chamber is located in the middle of the conveyor line, and the inspection chamber is not in contact with the conveyor line. Two sleeves are installed inside the inspection chamber, and lifting airbags are connected to the outer walls of each sleeve. A support plate is located near the upper end of the inspection chamber, and a drive motor is installed on one side of the support plate. This invention utilizes the flying shear principle to construct the inspection structure. The inspection chamber spans above the conveyor line without rigid contact. The lifting airbags, rotating at the same linear speed as the conveyor line, clamp and convey the moving bottle. The clamping and conveying speed is adjustable and matched to the main conveyor speed to avoid motion interference. As the bottle moves along with the clamp, a vertical lifting action is triggered, briefly detaching the bottle from the conveyor line to isolate it from vibrations.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology, specifically to an online visual inspection device for food filling. Background Technology

[0002] In the food filling production process, online liquid level visual inspection is an important step in controlling filling accuracy and screening out unqualified products. Currently, in production, inspection stations are usually set up along the conveyor path, and visual acquisition equipment is used to collect liquid level information of the bottles in motion, thereby realizing online control of filling quality and adapting to the operation rhythm of continuous production.

[0003] In actual production operations, the mechanical vibration of the conveyor line itself and the periodic impact at the chain plate connection will continuously act on the bottles during transport, causing the liquid inside the bottles to float up and down. The liquid level in the fluctuating state is high on one side and low on the other side, which makes the imaging boundary recognition insufficient, causing deviations in liquid level judgment and directly affecting the accuracy of the detection results. Furthermore, the amplitude of liquid surface swaying and the time to natural calming vary for bottles of different diameters, and the detection accuracy cannot be guaranteed by using a single visual inspection.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide an online visual inspection device for food filling, so as to solve the problem mentioned in the background art that the floating of liquid inside the bottle results in insufficient image boundary recognition. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an online visual inspection device for food filling, comprising a conveyor line and a visual camera, wherein an inspection chamber is provided in the middle of the conveyor line, the inspection chamber is not in contact with the conveyor line, two sleeves are provided inside the inspection chamber, and lifting airbags are connected to the outer walls of the sleeves, a support plate is provided near the upper end of the inspection chamber, a drive motor is installed on one side of the support plate, a long gear is connected to the output end of the drive motor, and the other end of the long gear is rotatably connected to the inspection chamber; A conveying gap adjustment component is provided on one side of the support plate to adjust the gap between the two lifting airbags; The conveying spacing adjustment component includes two rectangular plates slidably connected to one side of the bearing plate. The detection chamber is rotatably connected to the two rectangular plates by a bidirectional screw. The two rectangular plates are threadedly connected to the bidirectional screw. The upper end of each rectangular plate is rotatably connected to a drive shaft. The lower end of the drive shaft is machined into a spline shape. The two sleeves are slidably installed at the lower end of the drive shaft. The lower end of the drive shaft is connected to a support plate corresponding to the lower end of the lifting airbag. A compression assembly is provided near the upper end of the lifting airbag on the drive shaft for compressing the airbag; The lower end of the rectangular plate is also provided with a detection buffer assembly, which is used to buffer the swaying liquid surface inside the bottle.

[0007] Preferably, the conveying spacing adjustment assembly further includes a circular shaft rotatably connected to one side of the upper end of the rectangular plate, one end of the circular shaft is connected to a driven gear, the other end of the circular shaft is connected to a driving helical gear, and the upper end of the driving shaft is connected to a driven helical gear corresponding to the driving helical gear.

[0008] Preferably, the detection buffer assembly includes a vertical rod connected to the lower end of the rectangular plate, and each vertical rod has an adjusting rod rotatably connected to its lower end, with an adjusting groove provided at the other end of each adjusting rod.

[0009] Preferably, the detection chamber is connected to an adjusting cylinder corresponding to the adjusting rod, and an adjusting block is connected to the inner wall of the adjusting cylinder, with the adjusting block embedded in the adjusting groove.

[0010] Preferably, the other end of each adjusting rod is connected to an inclined plate, the sleeve is connected to a lifting guide rod corresponding to the inclined plate, the lifting guide rod movably passes through the support plate, and the lower end of the lifting guide rod is connected to a roller.

[0011] Preferably, the detection buffer assembly further includes an extension rod connected to one side of the vertical rod, and each of the extension rods is connected to a lifting frame at the end away from the vertical rod, and the two lifting frames are provided with U-shaped grooves at the ends away from the extension rods.

[0012] Preferably, the two lifting frames are arranged at an angle and staggered, and the bearing plate is vertically slidably connected to the detection bracket corresponding to the lifting frame, and the vision camera is installed at the lower end of the detection bracket.

[0013] Preferably, the visual camera is connected to a force-bearing shaft on its back side. The force-bearing shaft is positioned between two staggered lifting frames and is movably embedded in the U-shaped grooves opened in the two lifting frames.

[0014] Preferably, the compression assembly includes a base mounted on the outer wall of the drive shaft, with clearance brackets connected to both sides of the base, and an abutment ring connected to the lower end of the clearance bracket, the inner diameter of the abutment ring being larger than the outer diameter of the sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes the flying shear principle to construct a detection architecture. The detection chamber is positioned above the conveyor line without rigid contact. A rotating lifting airbag, with a linear speed consistent with the conveyor line, clamps and conveys the moving bottle. The clamping and conveying speed is adjustable and matched with the main conveyor speed to avoid motion interference. As the bottle moves along with the clamp, a vertical lifting action is triggered. This lifting action briefly removes the bottle from the conveyor line to isolate it from vibrations, allowing the liquid surface to stabilize before image acquisition. This effectively improves the boundary recognition of the liquid surface image, ensures the accuracy of the liquid level detection results, and adapts to the operating rhythm of continuous filling production.

[0016] 2. Relying on the flexible deformation characteristics of the lifting airbag, the lifting stroke is positively correlated with the degree of compression of the lifting airbag. The greater the lifting stroke, the greater the axial compression of the lifting airbag by the abutment ring. The circumferential expansion of the airbag and the clamping force increase simultaneously, so that large-diameter bottles can obtain stronger flexible circumferential restraint during strong shaking, while small-diameter bottles maintain a moderate clamping force, avoiding excessive clamping that interferes with the smooth delivery of the bottle, and ensuring the clamping stability and liquid surface smoothing effect under different bottle diameters.

[0017] 3. This invention adopts a bidirectional screw-driven spacing adjustment structure, which can change the spacing between the two airbags with a single adjustment to adapt to the clamping requirements of bottles with different diameters. During the spacing adjustment process, the guide cooperation of the vertical rod, adjusting rod and adjusting cylinder can drive the tilt plate to deflect and change the slope tilt angle, matching the lifting acceleration and buffer stroke of the corresponding bottle diameter. At the same time, through the linkage of the extension rod and the lifting frame, the vertical imaging height of the vision camera can be adjusted simultaneously, so that the lifting parameters are adapted to the height of the detection position. No step adjustment is required, which can improve the changeover efficiency of mixed production lines and maintain the liquid surface leveling effect and detection accuracy under different bottle diameters. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a first sectional view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of the structure of region A; Figure 4 This is a second sectional view of the overall structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure of region B; Figure 6 This is a cross-sectional view of the regulating cylinder structure of the present invention; Figure 7 This is a cross-sectional view of the lifting airbag structure of the present invention; Figure 8 This is a schematic diagram of the lifting frame structure of the present invention.

[0019] In the diagram: 1. Conveyor line; 2. Inspection chamber; 3. Sleeve; 4. Lifting airbag; 5. Bearing plate; 6. Drive motor; 7. Long gear; 901. Rectangular plate; 902. Double-acting lead screw; 903. Drive shaft; 904. Support plate; 905. Round shaft; 906. Driven gear; 907. Driven helical gear; 908. Driven helical gear; 101. Vertical rod; 102. Adjusting rod; 103. Adjusting groove; 104. Adjusting cylinder; 105. Adjusting block; 106. Inclined plate; 107. Lifting guide rod; 108. Roller; 109. Extension rod; 110. Lifting frame; 111. U-shaped groove; 112. Inspection bracket; 113. Vision camera; 114. Force-bearing shaft; 801. Base; 802. Clearance frame; 803. Abutment ring. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] Please see Figures 1-8 The present invention provides a technical solution: an online visual inspection device for food filling, including a conveyor line 1 and a visual camera 113. An inspection chamber 2 is provided in the middle of the conveyor line 1. The inspection chamber 2 is not in contact with the conveyor line 1. Two sleeves 3 are provided inside the inspection chamber 2. Lifting airbags 4 are connected to the outer walls of the sleeves 3. A support plate 5 is provided near the upper end of the inspection chamber 2. A drive motor 6 is installed on one side of the support plate 5. A long gear 7 is connected to the output end of the drive motor 6, and the other end of the long gear 7 is rotatably connected to the inspection chamber 2. A conveying gap adjustment component is provided on one side of the support plate 5 to adjust the gap between the two lifting airbags 4; The conveying spacing adjustment assembly includes two rectangular plates 901 slidably connected to one side of the bearing plate 5. The detection chamber 2 is rotatably connected to the two rectangular plates 901 by a bidirectional lead screw 902. The two rectangular plates 901 are threadedly connected to the bidirectional lead screw 902. The upper end of each rectangular plate 901 is rotatably connected to a drive shaft 903. The lower end of the drive shaft 903 is machined into a spline shape. Two sleeves 3 are slidably installed on the lower end of the drive shaft 903. The lower end of the drive shaft 903 is connected to a support plate 904 corresponding to the lower end of the lifting airbag 4. The conveying spacing adjustment assembly also includes a round shaft 905 rotatably connected to one side of the upper end of the rectangular plate 901. One end of the round shaft 905 is connected to a driven gear 906, and the other end of the round shaft 905 is connected to a driving helical gear 907. The upper end of the drive shaft 903 is connected to a driven helical gear 908 corresponding to the driving helical gear 907. In use, the first adjustment is made according to the diameter of the filling bottle. According to the diameter specification of the bottle to be produced, the double-acting screw 902 is rotated. The double-acting screw 902 drives the two rectangular plates 901 to move towards or away from each other along the guide direction of the bearing plate 5. The moving rectangular plates 901 drive the drive shaft 903 to move laterally. The spline section at the lower end of the drive shaft 903 drives the sleeve 3 and the lifting airbag 4 to move simultaneously, thereby adjusting the center distance between the two lifting airbags 4 so that the airbag clamping compression is always maintained in a suitable range to adapt to filling bottles of different diameters. After the spacing adjustment is completed, the drive motor 6 can be started. The drive motor 6 drives the long gear 7 to rotate at a constant speed, which in turn drives the driven gears 906 on both sides to rotate. The driven gears 906 drive the round shaft 905 to rotate, the round shaft 905 drives the drive helical gear 907 to rotate, and the drive helical gear 907 drives the driven helical gear 908 to rotate. The driven helical gear 908 drives the drive shaft 903 to rotate, and the lower end of the drive shaft 903 drives the sleeve 3 to rotate through the spline engagement, so that the linear velocity of the bottle contact surface of the two lifting airbags 4 is consistent with the conveyor line 1. The two lifting airbags 4 rotating at a constant speed can squeeze and convey the filling bottle, improving the stability of the bottle. Moreover, this principle is the same as the flying shear principle, and there will be no motion interference during the squeezing and conveying process.

[0022] In one embodiment of the present invention, a detection buffer assembly is provided at the lower end of the rectangular plate 901 to buffer the swaying liquid surface inside the bottle; the detection buffer assembly includes a vertical rod 101 connected to the lower end of the rectangular plate 901, and an adjusting rod 102 is rotatably connected to the lower end of each vertical rod 101, and an adjusting groove 103 is opened at the other end of each adjusting rod 102; an adjusting cylinder 104 is connected to the detection chamber 2 corresponding to the adjusting rod 102, and an adjusting block 105 is connected to the inner wall of the adjusting cylinder 104, and the adjusting block 105 is embedded in the adjusting groove 103; an inclined plate 106 is connected to the other end of each adjusting rod 102, and a lifting guide rod 107 is connected to the sleeve 3 corresponding to the inclined plate 106, the lifting guide rod 107 movably passes through the support plate 904, and a roller 108 is connected to the lower end of the lifting guide rod 107. During the spacing adjustment process, when the two rectangular plates 901 move, the vertical rod 101 at the lower end of the rectangular plates 901 moves laterally in sync. The moving vertical rod 101 drives the adjustment rod 102 at its end to move, causing the grooved end of the adjustment rod 102 to extend or retract into or out of the adjustment cylinder 104. When the adjustment rod 102 moves horizontally, the inner wall of the adjustment groove 103 is squeezed by the adjustment block 105, forcing the adjustment rod 102 to deflect around its rotational hinge point with the vertical rod 101. This deflection angle is related to the moving direction of the two rectangular plates 901. When the two rectangular plates 901 move away from each other, the inner wall of the adjustment groove 103 is squeezed by the adjustment block 105 for a larger distance, and the tilt angle between the adjustment rod 102 and the tilting plate 106 will gradually increase, and vice versa. When the angle is larger, the subsequent lifting stroke and lifting transition speed will increase accordingly to match the larger liquid surface sway amplitude of the large bottle, so that the bottle can enter a relatively stable state suitable for image acquisition more quickly after leaving the vibration source of the conveyor line.

[0023] In one embodiment of the present invention, the detection buffer assembly further includes an extension rod 109 connected to one side of the vertical rod 101. Each end of the extension rod 109 away from the vertical rod 101 is connected to a lifting frame 110. A U-shaped groove 111 is formed at the end of each lifting frame 110 away from the extension rod 109. The two lifting frames 110 are arranged in an inclined, staggered manner. A detection bracket 112 is vertically and slidably connected to the support plate 5 corresponding to the lifting frame 110. A vision camera 113 is installed at the lower end of the detection bracket 112. A force-bearing shaft 114 is connected to the back of the vision camera 113. The force-bearing shaft 114 is positioned between the two staggered lifting frames 110, and the force-bearing shaft 114 is movably embedded within the U-shaped groove 111 formed by the two lifting frames 110. When the spacing between the two lifting airbags 4 is adjusted, the vertical rod 101 moves synchronously. As the vertical rod 101 moves laterally, it drives the extension rod 109 to move horizontally. The extension rod 109 drives the lifting frame 110 fixed at the end to move laterally. When the lifting frame 110 moves laterally, the inclined inner wall of the U-shaped groove 111 squeezes the force shaft 114, causing the force shaft 114 to move up and down in the vertical direction. The force shaft 114 synchronously drives the detection bracket 112 to slide vertically along the support plate 5, thereby driving the vision camera 113 to move up and down, so that the camera imaging height matches the lifting stroke of the lifting airbag 4, ensuring that the liquid surface is always within the clear imaging range of the vision camera 113 after the bottle is lifted. There is no need to manually adjust the camera position separately. This adjustment method can effectively detect the buffer and stability nodes of the liquid surface in the bottle.

[0024] In one embodiment of the present invention, a compression assembly is provided on the drive shaft 903 near the upper end of the lifting airbag 4 for compressing the airbag 4; the compression assembly includes a base 801 installed on the outer wall of the drive shaft 903, a clearance frame 802 connected to both sides of the base 801, and an abutment ring 803 connected to the lower end of the clearance frame 802, the inner diameter of the abutment ring 803 being larger than the outer diameter of the sleeve 3; During the lifting process of the lifting airbag 4, the upper end of the lifting airbag 4 will gradually approach the lower end face of the abutment ring 803. As the sleeve 3 continues to move upward, the abutment ring 803 forms an axial compression on the top of the lifting airbag 4, causing the lifting airbag 4 to expand circumferentially and increase the circumferential clamping force on the side wall of the bottle.

[0025] Working principle: In use, the first adjustment is made according to the diameter of the filling bottle. According to the diameter specification of the bottle to be produced, the double-acting screw 902 is rotated. The double-acting screw 902 drives the two rectangular plates 901 to move towards or away from each other along the guide direction of the bearing plate 5. The moving rectangular plates 901 drive the drive shaft 903 to move laterally. The spline section at the lower end of the drive shaft 903 drives the sleeve 3 and the lifting airbag 4 to move simultaneously, thereby adjusting the center distance between the two lifting airbags 4 so that the airbag clamping compression is always maintained in a suitable range to adapt to filling bottles of different diameters. As the rectangular plate 901 moves laterally, it causes the vertical rod 101 fixed at its lower end to move laterally. The moving vertical rod 101 causes the adjusting rod 102 at its end to move, causing the grooved end of the adjusting rod 102 to extend or retract into or out of the adjusting cylinder 104. When the adjusting rod 102 moves laterally, the inner wall of the adjusting groove 103 is squeezed by the adjusting block 105, forcing the adjusting rod 102 to deflect around its rotational hinge point with the vertical rod 101. The deflection of the adjusting rod 102 causes the inclined plate 106 fixed at its end to rotate, changing the inclination angle of the inclined plate 106 and the height of the lifting peak. As the inclination angle of the inclined plate 106 increases, the subsequent lifting stroke and lifting transition speed increase accordingly to match the larger liquid surface sloshing amplitude of the large bottle, so that the bottle can enter a relatively stable state suitable for image acquisition more quickly after leaving the vibration source of the conveyor line. As the vertical rod 101 moves laterally, it drives the extension rod 109 fixed to its side to move horizontally. The extension rod 109 drives the lifting frame 110 fixed to its end to move laterally in sync. When the lifting frame 110 moves laterally, the inclined inner wall of the U-shaped groove 111 squeezes the force shaft 114, causing the force shaft 114 to rise and fall in the vertical direction. The force shaft 114 simultaneously drives the detection bracket 112 to slide vertically along the bearing plate 5, thereby driving the vision camera 113 to rise and fall, so that the imaging height of the camera is matched with the lifting stroke of the lifting airbag 4, ensuring that the liquid surface is always within the clear imaging range of the vision camera 113 after the bottle is lifted, without the need for separate manual adjustment of the camera position.

[0026] During normal production and testing, when the conveyor line 1 is started, the filled bottles are continuously transported into the testing chamber 2 along the conveyor line 1. The testing chamber 2 is located across the middle of the conveyor line 1 and has no rigid contact with the conveyor line 1. The entire testing mechanism is suspended above the conveyor line and does not interfere with the rhythm of the conveyor line 1. Start the drive motor 6. The output end of the drive motor 6 drives the long gear 7 to rotate at a constant speed. The long gear 7 drives the driven gears 906 meshing on both sides to rotate. The driven gears 906 drive the round shaft 905 to rotate. The round shaft 905 drives the drive helical gear 907 to rotate. The drive helical gear 907 drives the driven helical gear 908 to rotate. The driven helical gear 908 drives the drive shaft 903 to rotate. The lower end of the drive shaft 903 drives the sleeve 3 to rotate through the spline engagement, so that the linear velocity of the bottle contact surface of the two lifting airbags 4 is consistent with the conveyor line 1. During the spacing adjustment process, the driven gear 906 can slide along the axial direction of the long gear 7 and always remain in a meshed state. When the bottle is conveyed between the two lifting airbags 4, the two lifting airbags 4 rely on their own elastic deformation to squeeze and adhere to the outer wall of the bottle, forming a flexible clamp; the linear velocity direction of the bottle contact surface of the two lifting airbags 4 is consistent with the conveying direction of the conveying line 1, and the bottle is conveyed by the rolling friction of the contact surface; as the bottle continues to move forward, the roller 108 rotatably mounted at the lower end of the lifting guide rod 107 gradually contacts the upper slope surface of the inclined plate 106; as the roller 108 continues to roll and rise along the slope surface of the inclined plate 106, the slope support force of the inclined plate 106 pushes the lifting guide rod 107 to slide vertically upward along the support plate 904, thereby driving the sleeve 3 and the lifting airbag 4 as a whole along the spline section of the drive shaft 903. Sliding upwards, the clamped bottle is lifted off the surface of conveyor line 1. During the lifting process, the upper end of the lifting airbag 4 gradually approaches the lower end face of the abutment ring 803. As the sleeve 3 continues to move upwards, the abutment ring 803 forms an axial compression on the top of the lifting airbag 4, reducing the internal volume and increasing the internal pressure of the lifting airbag 4. This causes the lifting airbag 4 to expand circumferentially, increasing the clamping force on the side wall of the bottle. Through the lifting action, the bottle is temporarily removed from conveyor line 1 to isolate the vibration of conveyor line 1 itself. When the roller 108 reaches the top of the slope of the inclined plate 106, the liquid surface is leveled. After the photoelectric sensor detects that the bottle has reached the acquisition height, it sends a sensing signal to the controller, which then drives the vision camera 113. Upon startup, the liquid level inside the bottle is captured by image acquisition, completing online liquid level detection and appearance defect identification. After the detection is completed, the lifting guide rod 107, which loses the support of the tilting plate 106 as it rotates, drives the sleeve 3 and the lifting airbag 4 to fall vertically and rebound and retract. The bottle falls back onto the surface of the conveyor line 1 and enters the next process.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An online visual inspection device for food filling, comprising a conveyor line (1) and a visual camera (113), characterized in that: A detection chamber (2) is provided in the middle of the conveyor line (1). The detection chamber (2) is not in contact with the conveyor line (1). Two sleeves (3) are provided inside the detection chamber (2). Lifting airbags (4) are connected to the outer walls of the sleeves (3). A bearing plate (5) is provided near the upper end of the detection chamber (2). A drive motor (6) is installed on one side of the bearing plate (5). A long gear (7) is connected to the output end of the drive motor (6), and the other end of the long gear (7) is rotatably connected to the detection chamber (2). A conveying gap adjustment component is provided on one side of the bearing plate (5) for adjusting the gap between the two lifting airbags (4); The conveying spacing adjustment assembly includes two rectangular plates (901) slidably connected to one side of the bearing plate (5). The detection chamber (2) is rotatably connected to the two rectangular plates (901) with a bidirectional screw (902). The two rectangular plates (901) are threadedly connected to the bidirectional screw (902). The upper end of each rectangular plate (901) is rotatably connected to a drive shaft (903). The lower end of the drive shaft (903) is machined into a spline shape. The two sleeves (3) are slidably installed on the lower end of the drive shaft (903). The lower end of the drive shaft (903) is connected to a support plate (904) corresponding to the lower end of the lifting airbag (4). A compression assembly is provided near the upper end of the drive shaft (903) for compressing the airbag (4). The lower end of the rectangular plate (901) is also provided with a detection buffer assembly, which is used to buffer the swaying liquid surface inside the bottle; The detection buffer assembly includes a vertical rod (101) connected to the lower end of the rectangular plate (901), and an adjusting rod (102) is rotatably connected to the lower end of each vertical rod (101). An adjusting groove (103) is opened at the other end of each adjusting rod (102). The detection chamber (2) is connected to an adjusting cylinder (104) corresponding to the adjusting rod (102), and an adjusting block (105) is connected to the inner wall of the adjusting cylinder (104). The adjusting block (105) is embedded in the adjusting groove (103). The other end of each adjusting rod (102) is connected to an inclined plate (106), and the sleeve (3) is connected to a lifting guide rod (107) corresponding to the inclined plate (106). The lifting guide rod (107) moves through the support plate (904), and the lower end of the lifting guide rod (107) is connected to a roller (108). The detection buffer assembly also includes an extension rod (109) connected to one side of the vertical rod (101). The end of the extension rod (109) away from the vertical rod (101) is connected to a lifting frame (110). The ends of the two lifting frames (110) away from the extension rod (109) are provided with U-shaped grooves (111).

2. The online visual inspection device for food filling according to claim 1, characterized in that: The conveying spacing adjustment assembly also includes a circular shaft (905) rotatably connected to one side of the upper end of the rectangular plate (901). One end of the circular shaft (905) is connected to a driven gear (906), and the other end of the circular shaft (905) is connected to a driving helical gear (907). The upper end of the drive shaft (903) is connected to a driven helical gear (908) corresponding to the driving helical gear (907).

3. The online visual inspection device for food filling according to claim 1, characterized in that: The two lifting frames (110) are arranged in an inclined and staggered manner. The bearing plate (5) is vertically slidably connected to the detection bracket (112) corresponding to the lifting frame (110). The vision camera (113) is installed at the lower end of the detection bracket (112).

4. The online visual inspection device for food filling according to claim 3, characterized in that: The visual camera (113) is connected to a force-bearing shaft (114) on its back side. The force-bearing shaft (114) is located between two staggered lifting frames (110) and is movably embedded in the U-shaped groove (111) opened by the two lifting frames (110).

5. The online visual inspection device for food filling according to claim 1, characterized in that: The compression assembly includes a base (801) mounted on the outer wall of the drive shaft (903), with clearance brackets (802) connected to both sides of the base (801), and an abutment ring (803) connected to the lower end of the clearance brackets (802), the inner diameter of the abutment ring (803) being larger than the outer diameter of the sleeve (3).

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