Reversible two-dimensional code reading device and reading method

Abstract

The invention aims to solve the problem that the existing hub code reading equipment is difficult to overturn to read the codes on the back of the hub. The invention provides a turnover two-dimensional code reading device and a turnover two-dimensional code reading method. The turnover device comprises a code reading device, an external frame, a supporting transmission structure, a clamping structure and a turnover structure, wherein the supporting transmission structure comprises an upper plate, a lower plate and two side plates; perspective through holes are respectively formed in an upper plate and a lower plate of the support transmission structure; the code reading device is fixedly arranged on the external frame and located over the supporting transmission structure. A roller conveying belt is arranged above a lower plate of the supporting conveying structure. The clamping structure comprises a lateral clamping assembly and a vertical pressing assembly. The lateral clamping assembly is arranged below the lower plate, and the vertical pressing assembly is arranged on the upper plate. The overturning structure is fixedly arranged on the outer frame, and the overturning structure is further in transmission connection with a rotating shaft of the supporting and conveying structure; and the codes on the front and back surfaces of the hub are read by overturning.

Description

Technical Field

[0001] The present invention relates to the field of code scanning and reading equipment, and in particular to a flippable two-dimensional code reading device and a reading method. Background Art

[0002] After the production of the vehicle's wheel hub is completed, it needs to go through multiple inspection processes. In order to facilitate the recording of the wheel hub information, coded information is also set on the wheel hub, such as one-dimensional code or two-dimensional code. Existing wheel hub coding information acquisition devices are usually installed on the side of the wheel hub transmission equipment, such as the content shown in the patent with authorization announcement number CN213411894U and application publication number CN111452004A, which is used to read the one-dimensional barcode on the side of the wheel hub. With the rolling wheel hub, it can detect the barcode around it and achieve more accurate reading.

[0003] However, it is difficult to accurately read the codes on the mounting plate on the back of the hub or on the back of the spokes, especially it is difficult to determine whether the code is on the upper or lower surface of the lying hub. Therefore, in the traditional method, it is necessary to cooperate with manpower to flip the hub, which is time-consuming and laborious; or it is necessary to use a visual device to first inspect the side of the hub where the QR code is set, and then place the hub on the conveyor belt, which reduces the overall efficiency and increases the equipment cost. On the other hand, in some QR code reading devices, the device for reading the QR code is set below the hub, usually below the conveyor belt; at this time, the hub is easily dropped on the reading device due to impurities such as cutting fluid and aluminum chips adhered to the previous process, which pollutes the equipment and affects the service life of the equipment and the reading effect. Therefore, there is a need for a device and a code reading method that can flip and read the QR code on the hub. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the prior art and provide a flippable two-dimensional code reading device and method.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: A flippable two-dimensional code reading device comprises a code reading device for reading a two-dimensional code, and also comprises an external frame, a supporting transmission structure, a clamping structure and a flipping structure; wherein the supporting transmission structure is in the shape of a channel connected front to back, and comprises an upper plate, a lower plate and two side plates; the upper plate and the lower plate of the supporting transmission structure are respectively provided with perspective through holes for convenient code reading; the code reading device is fixedly arranged on the external frame, and the code reading device is located directly above the supporting transmission structure; a roller conveyor belt is arranged above the lower plate of the supporting transmission structure; the clamping structure comprises a lateral clamping assembly and a vertical clamping assembly; the lateral clamping assembly is arranged below the lower plate, and the lateral clamping assembly clamps the outer periphery of the wheel hub through a connecting rod mechanism; the vertical clamping assembly is arranged on the upper plate, and the vertical clamping assembly presses the wheel hub onto the roller conveyor belt from top to bottom; the two side plates of the supporting transmission structure are respectively provided with rotating shafts rotatably connected to the external frame; the flipping structure is fixedly arranged on the external frame, and the flipping structure is also transmission-connected to the rotating shaft of the supporting transmission structure to control the rotation of the rotating shaft.

[0006] Furthermore, the connecting rod structure of the lateral clamping assembly includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod; the lateral clamping assembly also includes a clamping cylinder, a first gear set, a second gear set and a clamping arm; wherein the first gear set and the second gear set respectively include two gears meshing with each other; the two gears in the first gear set are rotatably connected to the lower plate, and the shafts of the two gears also pass through the lower plate and the roller conveyor belt and are respectively fixedly connected to one end of the two clamping arms; the two gears in the second gear set are rotatably connected to the lower plate, and the shafts of the two gears also pass through the lower plate and the roller conveyor belt They are fixedly connected with one end of the two clamping arms respectively; the first gear group and the second gear group are respectively arranged on both sides of the lower plate close to the two side plates; the first connecting rod is fixedly arranged on the telescopic rod of the clamping cylinder; the second connecting rod is fixedly arranged on a gear of the first gear group, and the gear is close to the middle part of the second connecting rod; the fourth connecting rod is fixedly arranged on a gear of the second gear group; the two ends of the third connecting rod are respectively rotatably connected with the fourth connecting rod and one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected with the first connecting rod; the end of the clamping cylinder away from the first connecting rod is also rotatably connected with the lower plate.

[0007] Furthermore, the lateral clamping assembly also includes a clamping wheel, which is arranged at one end of the clamping arm away from the gear; the clamping wheel is rotatably connected to the clamping arm.

[0008] Furthermore, the vertical clamping assembly includes a clamping cylinder, a guide rod, an upper pressure piece and a lower pressure piece; wherein there is at least one clamping cylinder, and the clamping cylinder is arranged on the outer side of the side plate; the upper pressure piece is arranged above the upper plate, and the upper pressure piece is respectively fixedly connected to the telescopic rod of the clamping cylinder and one end of several guide rods; the upper pressure piece is also provided with a square through hole corresponding to the perspective through hole of the upper plate; the other end of the guide rod passes through the guide sleeve of the upper plate and is fixedly connected to the lower pressure piece located inside the supporting transmission structure.

[0009] Furthermore, there are two clamping cylinders, which are respectively arranged on two side plates; the two clamping cylinders are fixedly connected to the plate-shaped upper pressing member.

[0010] Furthermore, the lower pressing member includes two clamping rods; four guide rods are fixedly arranged on the upper pressing member, and the four guide rods are divided into two groups, and a clamping rod is arranged on each group of guide rods; an anti-slip elastic layer is also arranged on the lower side of the clamping rod close to the wheel hub.

[0011] Furthermore, a limit block protruding outward is arranged on one of the side panels of the supporting transmission structure, and a plurality of travel switches corresponding to the limit block are arranged on the external frame, and the travel switches are located on the movement track of the limit block.

[0012] Furthermore, the side panel is also provided with a first photoelectric sensing component, a second photoelectric sensing component and a third photoelectric sensing component for sensing the position of the wheel hub; wherein the first photoelectric sensing component is fixedly arranged on the side panel near the position where the supporting transmission structure is fed into the wheel hub; the second photoelectric sensing component is fixedly arranged on the middle position of the side panel corresponding to the clamping structure; the third photoelectric sensing component is fixedly arranged on the side panel near the position where the supporting transmission structure is fed out of the wheel hub.

[0013] Furthermore, a movable material receiving box is provided inside the external frame; the material receiving box is located directly below the supporting transmission structure.

[0014] A method for reading a wheel hub QR code is based on the above-mentioned flipping device, and the method comprises the following steps: Step 1: The first photoelectric sensing component senses that the wheel hub is sent into the supporting transmission structure, controls the movement of the roller conveyor belt and wakes up the second photoelectric sensing component; Step 2: The second photoelectric sensing component senses that the wheel hub has reached the area corresponding to the clamping structure, stops the roller conveyor belt, and controls the lateral clamping component in the clamping structure to clamp the wheel hub first, and then controls the vertical clamping component to clamp the wheel hub; Step 3: Wake up the code reader, and scan the QR code on one side of the hub through the transparent through hole; if the QR code is scanned, go to step 6; if the QR code is not scanned, go to step 4; Step 4: The flip structure controls the supporting transmission structure to rotate 180 degrees, and the code reading device continues to read the QR code; if the QR code is scanned, go to step 6; otherwise, an alarm is issued and go to step 5; Step 5: If the wheel hub QR code information is not obtained, it is judged to be an abnormal wheel hub, and the flip structure controls the supporting transmission structure to rotate 90 degrees, and the vertical clamping assembly and the lateral clamping assembly are released in sequence, and the wheel hub is controlled to fall into the receiving box, and the step ends; Step 6: Obtain the wheel hub QR code information and record it, control the flipping structure to rotate the supporting transmission structure 180 degrees, control the lateral clamping assembly in the clamping structure to release the wheel hub, control the vertical clamping assembly to release the wheel hub, and control the roller conveyor belt to start until the third photoelectric sensing assembly senses that the wheel hub leaves the supporting transmission structure, and then end the step.

[0015] The beneficial effects of the present invention are: By setting up a flip structure and a clamping structure in conjunction with a code reading device, the QR code on the front and back of the wheel hub can be read, so that the information of the wheel hub can be recorded; By setting a lateral clamping assembly including a connecting rod structure, the wheel hub can be symmetrically clamped or loosened, with a simple structure and good clamping effect; By setting a vertical clamping assembly, the wheel hub is pressed above the roller conveyor belt, and the lateral clamping assembly is used to restrict the wheel hub in all directions to ensure that the wheel hub will not deviate or fall off when flipping; By setting a limit block and a travel switch, the flip angle of the supporting transmission structure is controlled so that the code reading device can face the wheel hub. By arranging a buffer, the supporting transmission structure can stop rotating smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of Example 1; Figure 2 This is a schematic diagram of the flipping device of Example 1 without the external frame; Figure 3 Schematic diagram of the flip device of Example 1 without the external frame Figure 2 ; Figure 4 The front view of the flipping device of Example 1 without the external frame; Figure 5 This is a bottom view of the flipping device of Example 1 without the external frame; Figure 6 It is a lateral schematic diagram of the bottom of the supporting transmission structure of Example 1; Figure 7 It is a top lateral schematic diagram of the supporting transmission structure of Example 1; Figure 8 The top side view of the supporting transmission structure of Example 1 Figure 2 ; Fig. 9 This is a schematic diagram of a code reading device in Example 1.

[0017] Description of the accompanying symbols: code reading device 1, slide rail 11, base 12, extension rod 13, external frame 2, bearing seat 21, travel switch 22, buffer 23, support transmission structure 3, upper plate 31, perspective through hole 311, guide sleeve 312, lower plate 32, side plate 33, roller transmission belt 34, rotating shaft 35, limit block 36, first photoelectric sensing component 37, second photoelectric sensing component 38, third photoelectric sensing component 39, clamping structure 4, lateral clamp Tightening assembly 41, first connecting rod 411, second connecting rod 412, third connecting rod 413, fourth connecting rod 414, clamping cylinder 415, first gear set 416, second gear set 417, clamping arm 418, clamping wheel 419, vertical clamping assembly 42, clamping cylinder 421, guide rod 422, upper pressing piece 423, square through hole 4231, lower pressing piece 424, clamping rod 4241, anti-slip elastic layer 4242, flip structure 5, and material receiving box 6. DETAILED DESCRIPTION

[0018] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0019] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention. The figures only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0020] Embodiment 1: like Figure 1 to Figure 9As shown, a flippable two-dimensional code reading device includes a code reading device 1 for reading a two-dimensional code, and also includes an external frame 2, a supporting transmission structure 3, a clamping structure 4 and a flipping structure 5; wherein the supporting transmission structure 3 is in the shape of a channel connected front to back, including an upper plate 31, a lower plate 32 and two side plates 33, one end of the channel in the supporting transmission structure 3 is used for feeding into the wheel hub, and the other end is used for feeding out of the wheel hub; in this example, the overall shape of the supporting transmission structure 3 is a square tube; the upper plate 31 and the lower plate 32 of the supporting transmission structure 3 are respectively provided with perspective through holes 311 for convenient code reading; the code reading device 1 is fixedly arranged on the external frame 2, and the code reading device 1 is located directly above the supporting transmission structure 3, which effectively prevents impurities adhered to the wheel hub transmitted in the supporting transmission structure 3 from falling off On the surface of the code reading device 1; a roller conveyor belt 34 is arranged above the lower plate 32 of the supporting transmission structure 3; the clamping structure 4 includes a lateral clamping component 41 and a vertical clamping component 42; the lateral clamping component 41 is arranged below the lower plate 32, and the lateral clamping component 41 clamps the outer periphery of the hub through a connecting rod mechanism; the vertical clamping component 42 is arranged on the upper plate 31, and the vertical clamping component 42 presses the hub on the roller conveyor belt 34 from top to bottom; the two side plates 33 of the supporting transmission structure 3 are respectively provided with a rotating shaft 35 rotatably connected to the external frame 2, wherein the rotating shaft 35 is connected to the bearing seat 21 arranged on the external frame 2; the flip structure 5 is fixedly arranged on the external frame 2, and the flip structure 5 is also transmission-connected to the rotating shaft 35 of the supporting transmission structure 3 to control the rotation of the rotating shaft 35.

[0021] The roller conveyor belt 34 is connected to a transmission motor disposed above the upper plate 31 through a chain, and the transmission motor controls the movement of the roller conveyor belt 34 and drives the hub above the roller conveyor belt 34 to move.

[0022] The code reading device 1 is slidably arranged in the external frame 2. Two parallel slide rails 11 are fixedly arranged in the external frame 2. A base 12 of the code reading device 1 is slidably arranged on the slide rails 11. An extension rod 13 extending downward is also arranged on the base 12. The code reading device 1 and the extension rod 13 are slidably matched, so that the position of the code reading device 1 on the extension rod 13 can be adjusted, thereby adjusting the height of the code reading device 1.

[0023] The connecting rod structure of the lateral clamping assembly 41 includes a first connecting rod 411, a second connecting rod 412, a third connecting rod 413 and a fourth connecting rod 414; the lateral clamping assembly 41 also includes a clamping cylinder 415, a first gear set 416, a second gear set 417 and a clamping arm 418; wherein the first gear set 416 and the second gear set 417 respectively include two gears meshing with each other; the two gears in the first gear set 416 are rotatably connected to the lower plate 32, and the shafts of the two gears also pass through the lower plate 32 and the roller conveyor belt 34 and are respectively fixedly connected to one end of the two clamping arms 418; the two gears in the second gear set 417 are rotatably connected to the lower plate 32, and the shafts of the two gears also pass through the lower plate 32 and the roller conveyor belt 34 and are respectively fixedly connected to one end of the two clamping arms 418 Fixedly connected, a clamping wheel 419 is provided at the other end of the clamping arm 418; the first gear set 416 and the second gear set 417 are respectively arranged on both sides of the lower plate 32 close to the two side plates 33; the first connecting rod 411 is fixedly arranged on the telescopic rod of the clamping cylinder 415; the second connecting rod 412 is fixedly arranged on a gear of the first gear set 416, and the gear is close to the middle part of the second connecting rod 412; the fourth connecting rod 414 is fixedly arranged on a gear of the second gear set 417; the two ends of the third connecting rod 413 are respectively rotatably connected with the fourth connecting rod 414 and one end of the second connecting rod 412, and the other end of the second connecting rod 412 is rotatably connected with the first connecting rod 411; the end of the clamping cylinder 415 away from the first connecting rod 411 is also rotatably connected with the lower plate 32. When the clamping cylinder 415 is in motion, the first connecting rod 411 first drives the second connecting rod 412 to move, and the second connecting rod 412 drives the corresponding first gear set 416 to rotate. At the same time, the second connecting rod 412 also drives the third connecting rod 413 to move, and the third connecting rod 413 drives the fourth connecting rod 414 and the second gear set 417 to rotate; after the first gear set 416 and the second gear set 417 rotate, the clamping arm 418 is controlled to clamp the edge of the hub of the wheel 419. In this example, the lateral clamping assembly 41 also includes a clamping wheel 419, which is arranged at one end of the clamping arm 418 away from the gear; the clamping wheel 419 is rotatably connected to the clamping arm 418; the clamping wheel 419 hub is better realized by arranging the clamping wheel 419.

[0024] The vertical clamping assembly includes a clamping cylinder 421, a guide rod 422, an upper clamping piece 423 and a lower clamping piece 424; wherein there is at least one clamping cylinder 421, and the clamping cylinder 421 is arranged on the outer side of the side plate 33; the upper clamping piece 423 is arranged above the upper plate 31, and the upper clamping piece 423 is respectively fixedly connected to the telescopic rod of the clamping cylinder 421 and one end of a plurality of guide rods 422; the upper clamping piece 423 is also provided with a square through hole 4231 corresponding to the perspective through hole 311 of the upper plate 31; the other end of the guide rod 422 passes through the guide shaft sleeve 312 of the upper plate 31 and is fixedly connected to the lower clamping piece 424 located inside the supporting transmission structure 3. In order to make the clamping force distribution more uniform, two clamping cylinders 421 are arranged in this example, and the two clamping cylinders 421 are respectively arranged on the two side plates 33; the two clamping cylinders 421 are fixedly connected to the plate-shaped upper clamping piece 423. The lower pressing piece 424 includes two clamping rods 4241; four guide rods 422 are fixedly arranged on the upper pressing piece 423, and the four guide rods 422 are divided into two groups; the two groups of guide rods 422 are respectively arranged along the two long edges of the upper pressing piece 423, and each group of guide rods 422 is provided with a clamping rod 4241; the lower side of the clamping rod 4241 close to the wheel hub is also provided with an anti-slip elastic layer 4242; in this example, a polyurethane plate is used as the anti-slip elastic layer 4242.

[0025] A stopper 36 protruding outward is provided on one of the side plates 33 of the supporting transmission structure 3, and two travel switches 22 corresponding to the stopper 36 are provided on the external frame 2. The travel switches 22 are located at the starting position and the ending position of the movement track of the stopper 36. In this example, the starting position is when the upper plate 31 of the supporting transmission structure 3 faces the code reading device 1 directly above, and the ending position is when the lower plate 32 of the supporting transmission structure 3 faces the code reading device 1 directly above. In this example, two vertical buffers 23 are also provided on the external frame 2. The buffers 23 are also located on the movement track of the stopper 36. The two buffers 23 correspond to the starting and ending of the movement of the stopper 36, respectively, so that the supporting transmission structure 3 can stop rotating smoothly.

[0026] The side plate 33 is also provided with a first photoelectric sensing component 37, a second photoelectric sensing component 38 and a third photoelectric sensing component 39 for sensing the position of the wheel hub; the first photoelectric sensing component 37 is fixedly provided on the side plate 33 near the position where the support transmission structure 3 is fed into the wheel hub; the second photoelectric sensing component 38 is fixedly provided on the middle position of the side plate 33 corresponding to the clamping structure 4; the third photoelectric sensing component 39 is fixedly provided on the side plate 33 near the position where the support transmission structure 3 is fed out of the wheel hub. Three groups of photoelectric sensing components are provided to sense the position of the wheel hub in the support transmission structure 3 respectively, so as to facilitate the control of the clamping structure 4 to clamp the wheel hub accurately.

[0027] The outer frame 2 is also provided with a movable material receiving box 6, which is located directly below the supporting transmission structure 3. The bottom of the outer frame 2 is provided with a through structure, so that the wheel hub in the supporting transmission structure 3 can freely fall into the material receiving box 6 at the bottom, reducing the collision of the wheel hub.

[0028] A method for reading a wheel hub QR code is based on the above-mentioned flipping device, and the method comprises the following steps: Step 1: The first photoelectric sensing component 37 senses that the wheel hub is fed into the supporting transmission structure 3, controls the roller conveyor belt 34 to move and wakes up the second photoelectric sensing component 38; Step 2: The second photoelectric sensing component 38 senses that the wheel hub has reached the area corresponding to the clamping structure 4, stops the roller conveyor belt 34, and controls the lateral clamping component 41 in the clamping structure 4 to clamp the wheel hub first, and then controls the vertical clamping component 42 to clamp the wheel hub; Step 3: Wake up the code reading device 1, and the code reading device 1 scans the QR code on one side of the hub through the transparent through hole 311; if the QR code is scanned, go to step 6; if the QR code is not scanned, go to step 4; Step 4: The flipping structure 5 controls the supporting transmission structure 3 to rotate 180 degrees, and the code reading device 1 continues to read the QR code; if the QR code is scanned, go to step 6; otherwise, an alarm is issued and go to step 5; Step 5: If the wheel hub QR code information is not obtained, it is judged to be an abnormal wheel hub, and the flip structure 5 controls the supporting transmission structure 3 to rotate 90 degrees, and the vertical clamping assembly 42 and the lateral clamping assembly 41 are released in sequence, and the wheel hub is controlled to fall into the receiving box 6, and the step ends; Step 6: Obtain the wheel hub QR code information and record it, control the flipping structure 5 to rotate the supporting transmission structure 3 180 degrees, control the lateral clamping assembly 41 in the clamping structure 4 to release the wheel hub, control the vertical clamping assembly 42 to release the wheel hub, and control the roller conveyor belt 34 to start, until the third photoelectric sensing assembly 39 senses that the wheel hub leaves the supporting transmission structure 3, and end the step.

[0029] During the implementation process, by setting the flipping structure 5 and the clamping structure 4 in cooperation with the code reading device 1, the two-dimensional code on the front and back of the wheel hub can be read, so that the information of the wheel hub can be recorded; by setting the lateral clamping component 41 including the connecting rod structure, the symmetrical clamping or loosening of the wheel hub can be achieved, the structure is simple and the clamping effect is good; by setting the vertical clamping component, the wheel hub is pressed above the roller conveyor belt 34, and the lateral clamping component 41 is cooperated to restrict the wheel hub in all directions to ensure that the wheel hub will not be offset or fall off when flipping; by setting the limit block 36 in cooperation with the travel switch 22, the flipping angle of the supporting transmission structure 3 is controlled, so that the code reading device 1 can face the wheel hub; by setting the buffer 23, the supporting transmission structure 3 can stop rotating smoothly.

[0030] The above description is only a specific example of the present invention and does not constitute any limitation to the present invention. It is obvious that for professionals in this field, after understanding the content and principle of the present invention, various modifications and changes in form and details may be made without departing from the principle and structure of the present invention, but these modifications and changes based on the idea of ​​the present invention are still within the scope of protection of the claims of the present invention.

Claims

1. A reversible two-dimensional code reading device, comprising a code reading device (1) for reading a two-dimensional code, characterized in that: It also includes an external frame (2), a supporting transmission structure (3), a clamping structure (4) and a flipping structure (5); wherein the supporting transmission structure (3) is in the shape of a channel connected front to back, and includes an upper plate (31), a lower plate (32) and two side plates (33); the upper plate (31) and the lower plate (32) of the supporting transmission structure (3) are respectively provided with a transparent through hole (311) for convenient code reading; the code reading device (1) is fixedly arranged on the external frame (2), and the code reading device (1) is located directly above the supporting transmission structure (3); A roller conveyor belt (34) is arranged above the lower plate (32) of the supporting transmission structure (3); the clamping structure (4) comprises a lateral clamping assembly (41) and a vertical pressing assembly (42); the lateral clamping assembly (41) is arranged below the lower plate (32), and the lateral clamping assembly (41) clamps the outer periphery of the wheel hub through a connecting rod mechanism; the vertical pressing assembly (42) is arranged on the upper plate (31), and the vertical pressing assembly (42) presses the wheel hub onto the roller conveyor belt (34) from top to bottom; two side plates (33) of the supporting transmission structure (3) are respectively provided with rotating shafts (35) rotatably connected to the external frame (2); the flipping structure (5) is fixedly arranged on the external frame (2), and the flipping structure (5) is also transmission-connected to the rotating shaft (35) of the supporting transmission structure (3) to control the rotation of the rotating shaft (35).

2. A reversible two-dimensional code reading device according to claim 1, characterized in that: The connecting rod structure of the lateral clamping assembly (41) comprises a first connecting rod (411), a second connecting rod (412), a third connecting rod (413) and a fourth connecting rod (414); the lateral clamping assembly (41) further comprises a clamping cylinder (415), a first gear set (416), a second gear set (417) and a clamping arm (418); wherein the first gear set (416) and the second gear set (417) respectively comprise two gears meshing with each other; the two gears in the first gear set (416) are rotatably connected to the lower plate (32), and the shafts of the two gears also pass through the lower plate (32) and the roller conveyor belt (34) and are respectively fixedly connected to one end of the two clamping arms (418); the two gears in the second gear set (417) are rotatably connected to the lower plate (32), and the shafts of the two gears also pass through the lower plate (32) and the roller conveyor belt (34) and are respectively fixedly connected to one end of the two clamping arms (418); One end of the two clamping arms (418) is fixedly connected; the first gear set (416) and the second gear set (417) are respectively arranged on both sides of the lower plate (32) close to the two side plates (33); the first connecting rod (411) is fixedly arranged on the telescopic rod of the clamping cylinder (415); the second connecting rod (412) is fixedly arranged on a gear of the first gear set (416), and the gear is close to the middle part of the second connecting rod (412); the fourth connecting rod (414) is fixedly arranged on a gear of the second gear set (417); the two ends of the third connecting rod (413) are respectively rotatably connected to the fourth connecting rod (414) and one end of the second connecting rod (412), and the other end of the second connecting rod (412) is rotatably connected to the first connecting rod (411); the end of the clamping cylinder (415) away from the first connecting rod (411) is also rotatably connected to the lower plate (32).

3. A reversible two-dimensional code reading device according to claim 2, characterized in that: The lateral clamping assembly (41) further comprises a clamping wheel (419), which is arranged at one end of the clamping arm (418) away from the gear; the clamping wheel (419) is rotatably connected to the clamping arm (418).

4. The reversible two-dimensional code reading device according to claim 1, characterized in that: The vertical pressing assembly comprises a pressing cylinder (421), a guide rod (422), an upper pressing piece (423) and a lower pressing piece (424); wherein there is at least one pressing cylinder (421), and the pressing cylinder (421) is arranged on the outer side of the side plate (33); the upper pressing piece (423) is arranged above the upper plate (31), and the upper pressing piece (423) is respectively fixedly connected to the telescopic rod of the pressing cylinder (421) and one end of a plurality of guide rods (422); the upper pressing piece (423) is also provided with a square through hole (4231) corresponding to the perspective through hole (311) of the upper plate (31); the other end of the guide rod (422) passes through the guide shaft sleeve (312) of the upper plate (31) and is fixedly connected to the lower pressing piece (424) located inside the supporting transmission structure (3).

5. A reversible two-dimensional code reading device according to claim 4, characterized in that: There are two pressing cylinders (421) in total, and the two pressing cylinders (421) are respectively arranged on two side plates (33); the two pressing cylinders (421) are fixedly connected to a plate-shaped upper pressing member (423).

6. A reversible two-dimensional code reading device according to claim 4, characterized in that: The lower pressing piece (424) comprises two pressing rods (4241); four guide rods (422) are fixedly arranged on the upper pressing piece (423); the four guide rods (422) are divided into two groups, and each group of guide rods (422) is provided with a pressing rod (4241); an anti-slip elastic layer (4242) is also provided on the lower side of the pressing rod (4241) close to the wheel hub.

7. The flippable two-dimensional code reading device according to claim 1, characterized in that: A limit block (36) protruding outward is provided on one of the side plates (33) of the supporting transmission structure (3), and a plurality of travel switches (22) corresponding to the limit blocks (36) are provided on the external frame (2), wherein the travel switches (22) are located on the movement track of the limit blocks (36).

8. The flippable two-dimensional code reading device according to claim 1, characterized in that: The side plate (33) is also provided with a first photoelectric sensing component (37), a second photoelectric sensing component (38) and a third photoelectric sensing component (39) for sensing the position of the wheel hub; wherein the first photoelectric sensing component (37) is fixedly arranged on the side plate (33) at a position close to the supporting transmission structure (3) for feeding the wheel hub; the second photoelectric sensing component (38) is fixedly arranged on a middle position of the side plate (33) corresponding to the clamping structure (4); and the third photoelectric sensing component (39) is fixedly arranged on the side plate (33) at a position close to the supporting transmission structure (3) for feeding the wheel hub.

9. The flippable two-dimensional code reading device according to claim 1, characterized in that: A movable material receiving box (6) is also provided inside the external frame (2); the material receiving box (6) is located directly below the supporting transmission structure (3).

10. A method for reading a wheel hub two-dimensional code, characterized in that: Based on the flipping device according to any one of claims 1 to 9, the method comprises the following steps: Step 1: The first photoelectric sensing component (37) senses that the wheel hub is fed into the supporting transmission structure (3), controls the roller transmission belt (34) to move, and wakes up the second photoelectric sensing component (38); Step 2: The second photoelectric sensing component (38) senses that the wheel hub has reached the area corresponding to the clamping structure (4), stops the roller conveyor belt (34), and controls the lateral clamping component (41) in the clamping structure (4) to first clamp the wheel hub, and then controls the vertical pressing component (42) to press the wheel hub; Step 3: Wake up the code reading device (1), and the code reading device (1) scans the QR code on one side of the hub through the perspective through hole (311); if the QR code is scanned, proceed to step 6; if the QR code is not scanned, proceed to step 4; Step 4: The flipping structure (5) controls the supporting transmission structure (3) to rotate 180 degrees, and the code reading device (1) continues to read the QR code; if the QR code is scanned, the process proceeds to step 6; otherwise, an alarm is issued and the process proceeds to step 5; Step 5: If the wheel hub QR code information is not obtained, it is determined to be an abnormal wheel hub, and the flip structure (5) controls the supporting transmission structure (3) to rotate 90 degrees, and sequentially releases the vertical clamping assembly (42) and the lateral clamping assembly (41), and controls the wheel hub to fall into the receiving box (6), and the step ends; Step 6: Obtain the wheel hub QR code information and record it, control the flip structure (5) to rotate the support transmission structure (3) 180 degrees, control the lateral clamping assembly (41) in the clamping structure (4) to release the wheel hub, control the vertical clamping assembly (42) to release the wheel hub, and control the roller conveyor belt (34) to start, until the third photoelectric sensing assembly (39) senses that the wheel hub has left the support transmission structure (3), and end the step.

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