A conveying material posture switching device of a double-row parallel material conveyor

Abstract

This invention relates to the field of conveyor manufacturing technology, specifically to a material conveying posture switching device for a double-row parallel material conveyor, comprising: a conveying assembly for conveying two rows of parallel materials; a positioning and alignment device for blocking a pair of parallel materials to align them in the conveying direction; a centering device including a pair of limiting plates, the limiting plates being arranged in pairs on both sides of the material conveying direction; the centering device driving the pair of limiting plates to move synchronously towards each other to push the pair of parallel materials to center and align; and a posture switching execution device including a pallet and a posture switching drive assembly, the posture switching drive assembly being tractively connected to the pallet, the pallet being disposed on the conveying surface of the conveying assembly, the posture switching drive assembly driving the pallet to lift and horizontally rotate a preset angle to switch the posture of the materials. This ensures the positioning accuracy after the material posture is switched.

Description

Technical Field

[0001] This invention relates to the field of conveyor manufacturing technology, and specifically to a material conveying posture switching device for a double-row parallel material conveyor. Background Technology

[0002] When using a conveyor to transport materials, the material's posture needs to be adjusted to ensure it is transferred to the designated position. For conventional single-row material transport, posture switching can be achieved simply by positioning the material once and then switching the posture via an actuator. However, for double-row material transport, especially in automated loading and unloading machines, the transport path may bend during transport. The posture switching scheme described above for single-row material transport cannot guarantee the accuracy of material positioning and struggles to overcome positioning errors after posture switching. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a material conveying posture switching device for a double-row parallel material conveyor, which can ensure the positioning accuracy after the material posture is switched.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: A material conveying posture switching device for a double-row parallel material conveyor, comprising: Conveying assembly for conveying two rows of materials side by side; A positioning and alignment device includes a blocking member disposed on the conveying path of a conveying assembly, the blocking member being movably disposed for blocking a pair of side-by-side materials from aligning them in the conveying direction. A centering device, comprising a pair of limiting plates arranged in pairs on both sides of the material conveying direction; the centering device is used to drive the pair of limiting plates to move synchronously towards each other to push a pair of parallel materials to center and align. An attitude switching actuator includes a pallet and an attitude switching drive assembly. The attitude switching drive assembly is connected to the pallet in a transmission manner. The pallet is disposed on the conveying surface of the conveying assembly. The attitude switching drive assembly is used to drive the pallet to lift and rotate horizontally by a preset angle to switch the attitude of the material.

[0005] Based on the above structure, the principle of the material conveying posture switching device for a double-row parallel material conveyor is as follows: During posture switching, the positioning and alignment device first aligns the pair of materials conveyed by the conveying component in the conveying direction, then the centering device centers and aligns the pair of materials, and then the posture switching execution device performs posture switching on the pair of parallel materials moved to the pallet; when the materials move to the pallet, the posture switching drive component drives the pallet to lift the materials, rotates them by a preset angle, and then lowers them to reset, thereby realizing posture switching. The material conveying posture switching device for a double-row parallel material conveyor described in this application positions and aligns the pair of parallel materials in both the conveying direction and perpendicular to the conveying direction before performing posture switching, ensuring the positioning accuracy after the material posture switching.

[0006] Furthermore, in the material conveying posture switching device of the double-row parallel material conveyor, the conveying component includes: a first conveyor belt and a set of first pulleys, wherein the first pulleys are used to support the first conveyor belt in conveying materials; The pallet is disposed on one side of the first pulley; the conveying assembly further includes a conveying wheel disposed below the pallet, and the pallet has openings corresponding to the conveying wheel, the openings being arranged in a circumferential array to correspond to the angle of rotation of the pallet. As a preferred embodiment of this application, when the pallet falls onto the conveying surface of the conveying assembly, the conveying wheel passes through the openings, enabling the conveyor to transport the material on the pallet. Because the openings are arranged in a circumferential array to correspond to the angle of rotation of the pallet, the conveying wheel can still pass through the openings after the pallet completes the angle switch and falls.

[0007] Furthermore, in the aforementioned material conveying posture switching device for a double-row parallel material conveyor, the conveying wheels include a set of first conveying wheels and a set of second conveying wheels arranged at intervals along the conveying direction. The first conveyor belt is wound around the first conveying wheels, and the first and second conveying wheels are connected in a driving connection. As a preferred embodiment of this application, the first conveyor belt both transmits power to the first conveying wheels and drives the material on the first conveying wheels to move. Furthermore, in the aforementioned material conveying posture switching device for a double-row parallel material conveyor, the conveying wheels are arranged in pairs along the width direction of the conveying assembly, with four conveying wheels on each side arranged along the conveying direction. The number of openings is 12, including four first openings corresponding to the two pairs of conveyor wheels in the middle, and four pairs of second openings disposed on the outer sides of the first openings. The first openings are arranged in a 2*2 square array, and each pair of second openings around the first openings is 90° apart in the circumferential direction. As a preferred embodiment of this application, based on the above structure, when performing attitude switching, the attitude switching drive component drives the pallet to rotate by an angle that is an integer multiple of 90°.

[0008] Furthermore, in the aforementioned material conveying posture switching device for a double-row parallel material conveyor, the limiting plates are disposed on both sides of the pallet, and the blocking members are disposed at the output end of the pallet corresponding to the conveying direction. As a preferred embodiment of this application, the positioning alignment, centering, and posture switching operations are performed at one workstation, which has the advantages of good structural compactness, high execution efficiency, and the fact that the conveying components do not need to be stopped during the execution process, resulting in a simple control system.

[0009] Furthermore, in the aforementioned material conveying posture switching device for a double-row parallel material conveyor, the posture switching drive assembly includes a posture switching rotary motor and a posture switching telescopic cylinder. The pallet is connected to the output shaft of the posture switching rotary motor, the posture switching rotary motor is mounted on the telescopic assembly of the posture switching telescopic cylinder, and the posture switching telescopic cylinder is mounted on a mounting frame. As a preferred embodiment of this application, the posture switching rotary motor is used for angular rotation, and the posture switching telescopic cylinder is used for lifting.

[0010] Furthermore, in the aforementioned material conveying posture switching device for a double-row parallel material conveyor, the centering device includes: A pair of slidably arranged positioning frames, wherein the positioning frames are provided with the limiting plate; A drive rotor is provided with a pair of transmission links, and the pair of transmission links are respectively connected to a pair of positioning frames. Driving the drive rotor to rotate enables a pair of transmission links to simultaneously move a pair of limiting plates toward adjacent sides, thereby achieving centering alignment of the material moving between the pair of limiting plates in the conveying direction. As a preferred embodiment of this application, based on the above structure, a single rotary driver can simultaneously drive the pair of limiting plates to slide synchronously, thus centering the material moving between the pair of limiting plates in the conveying direction. This design offers advantages such as simple control and high reliability.

[0011] Furthermore, in the material conveying posture switching device of the double-row parallel material conveyor, the transmission connecting rod is rotatably connected to the positioning frame, and the rotation axis of the pair of transmission connecting rods and the positioning frame is coplanar with the rotation axis of the drive rotor; the rotation axis between the transmission connecting rod and the positioning frame corresponds to the center position of the slide rail of the positioning frame in the width direction. As a preferred embodiment of this application, the force point applied by the transmission connecting rod to the positioning frame is at the center of the corresponding slide rail of the positioning frame, which ensures the stability of driving the positioning frame to slide. It should be noted that the center position of the corresponding slide rail in the width direction is, for example: if a pair of slide rails are provided, the center position is at the center position of the width direction corresponding to both sides of the pair of slide rails, that is, in the area where the symmetrical plane of the two slide rails is located; if only one slide rail is provided, the center position corresponds to the center position of the width direction of that slide rail.

[0012] Furthermore, in the material conveying posture switching device of the double-row parallel material conveyor, the rotating shaft of the drive rotor is offset from the center position of the slide rail of the positioning frame in the width direction. The centering device also includes a pair of rotatably mounted transmission arms; One side of the transmission arm is rotatably connected to the transmission link, and the other side is slidably connected to the positioning frame; The transmission arm has a rotary joint at the position of the sliding connection with the positioning frame, forming a double-pair connection of sliding and rotation; the sliding trajectory of the connection end of the transmission arm corresponding to the positioning frame corresponds to the center position of the slide rail of the positioning frame body in the width direction.

[0013] Due to installation constraints, the rotation axis of the drive rotor will deviate from the center position of the slide rail of the positioning frame in the width direction. If the transmission link is still hinged to the positioning frame, the hinge point will also deviate from the center position of the slide rail of the positioning frame in the width direction. This will cause the point of force pulling the positioning frame to move and the direction of force application to be too biased, which will accelerate the wear of the sliding contact position in engineering. As a preferred embodiment of this application, based on the above structure, the transmission arm is rotatably mounted on the frame on which the centering device is installed. Driving the drive rotor to rotate sequentially drives the transmission link and the transmission arm, finally realizing the movement of the positioning frame in the sliding direction. By controlling the sliding trajectory of the transmission arm corresponding to the connection end of the positioning frame to correspond to the center position of the slide rail of the positioning frame body in the width direction, it can be ensured that the point of force acting on the positioning frame is within a preset range of the center position of the slide rail of the positioning frame. Therefore, based on the above structure, the problem that when the rotation axis of the drive rotor deviates from the center position of the slide rail of the positioning frame, the point of force acting on the positioning frame will deviate from the center of the slide rail of the positioning frame will be solved.

[0014] Furthermore, in the material conveying posture switching device of the double-row parallel material conveyor, the positioning frame is provided with a transmission groove, the extension direction of which is perpendicular to the sliding direction of the positioning frame, and the transmission groove corresponds to the center position of the width direction of the positioning frame's slide rail; the transmission arm is provided with a transmission rod adapted to the width of the transmission groove, the transmission rod being cylindrical, and the transmission rod being slidably disposed in the transmission groove. As a preferred embodiment of this application, based on this transmission principle, it can also be achieved by rotating and mounting a slider on the transmission arm, so that the slider is slidably connected to the positioning frame. Based on the above structure, it has the advantage of simple structure.

[0015] As can be seen from the above technical solution, the present invention has the following beneficial effects: 1. The present invention provides a material conveying posture switching device for a double-row parallel material conveyor, which positions and aligns a pair of materials in parallel in two directions, one in the conveying direction and the other in a direction perpendicular to the conveying direction, and then switches their postures, thereby ensuring the positioning accuracy of the materials after the posture switch.

[0016] 2. This invention provides a material conveying posture switching device for a double-row parallel material conveyor. A single rotary driver (motor) can simultaneously drive a pair of limit plates to slide synchronously, thereby pushing the material moving between the limit plates to achieve centering in the conveying direction. It has the advantages of simple control and high reliability.

[0017] 3. The present invention provides a material conveying posture switching device for a double-row parallel material conveyor. The positioning, alignment, centering and posture switching operations are performed at one station. It has the advantages of good structure, high execution efficiency, and the conveying components do not need to be stopped during the operation, and the control system is simple. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the material conveying posture switching device of a double-row parallel material conveyor according to an embodiment of this application; Figure 2 For the corresponding Figure 1 Exploded view of the material conveying posture switching device of the double-row parallel material conveyor; Figure 3 This is a schematic diagram of the structure of the conveying assembly described in the embodiments of this application; Figure 4 This is a schematic diagram of the attitude switching execution device described in the embodiments of this application; Figure 5 This is a schematic diagram of the centering device described in Embodiment 3 of this application; Figure 6 This is a schematic diagram of the centering device described in Embodiment 2 of this application.

[0019] In the diagram: 31-Conveying assembly; 311-First pulley; 312-First conveyor belt; 313-Conveyor wheel; 3131-First conveyor wheel; 3132-Second conveyor wheel; 32-Plate; 321-Opening; 3211-First opening; 3212-Second opening; 361 - Attitude switching rotary motor; 362 - Attitude switching telescopic cylinder; 37-Centering device; 371-Drive rotor; 372-Positioning frame; 3721-Limiting plate; 3723-Slide rod; 3722-Transmission slide groove; 373-Transmission connecting rod; 374-Transmission arm; 3741-Transmission rod; 375-Stop bar. Detailed Implementation

[0020] Example 1 Combination Figures 1 to 3 The material conveying posture switching device of the double-row parallel material conveyor shown includes: Conveying assembly 31 is used to convey two rows of materials side by side; The positioning and alignment device includes a blocking member disposed on the conveying path of the conveying assembly 31, the blocking member being movably disposed for blocking a pair of side-by-side materials from aligning them in the conveying direction. The centering device 37 includes a pair of limiting plates 3721, which are arranged in pairs on both sides of the material conveying direction; the centering device 37 is used to drive the pair of limiting plates 3721 to move synchronously towards each other to push the pair of materials in parallel to be aligned in the center. The attitude switching actuator includes a pallet 32 ​​and an attitude switching drive assembly. The attitude switching drive assembly is connected to the pallet 32 ​​in a transmission manner. The pallet 32 ​​is disposed on the conveying surface of the conveying assembly 31. The attitude switching drive assembly is used to drive the pallet 32 ​​to lift and rotate horizontally by a preset angle to switch the attitude of the material.

[0021] Based on the above structure, the principle of the material conveying posture switching device for a double-row parallel material conveyor is as follows: During posture switching, the positioning and alignment device first aligns the pair of materials conveyed by the conveying component 31 in the conveying direction, then the centering device 37 centers and aligns the pair of materials, and then the posture switching execution device is used to switch the posture of the pair of parallel materials that have moved to the pallet 32; when the materials move onto the pallet 32, the posture switching drive component drives the pallet 32 ​​to lift the materials and rotate them by a preset angle, and then lowers them to reset, thereby realizing the posture switching. The material conveying posture switching device for a double-row parallel material conveyor described in this application positions and aligns the pair of parallel materials in two directions, one in the conveying direction and one perpendicular to the conveying direction, before performing posture switching, which can ensure the positioning accuracy of the materials after posture switching.

[0022] In this embodiment, the blocking member is a pair of stop rods 375. The pair of stop rods 375 are driven by a cylinder to extend out of the conveying surface of the conveying assembly 31 to achieve positioning of the conveying direction.

[0023] In this embodiment, the conveying assembly 31 includes: a first conveyor belt 312 and a set of first pulleys 311, wherein the first pulleys 311 are used to support the first conveyor belt 312 to convey materials; The pallet 32 ​​is disposed on one side of the first pulley 311; the conveying assembly 31 also includes a conveying wheel 313 disposed below the pallet 32, and the pallet 32 ​​is provided with an opening 321 corresponding to the conveying wheel 313, and the openings 321 are arranged in a circumferential array corresponding to the rotation angle of the pallet 32.

[0024] When the pallet 32 ​​falls onto the conveying surface of the conveying assembly 31, the conveying wheel 313 passes through the opening 321 and can convey the material on the pallet 32. Since the opening 321 is arranged in a circumferential array corresponding to the angle of rotation of the pallet 32, the conveying wheel 313 can still pass through the opening 321 after the pallet 32 ​​completes the angle switch and falls.

[0025] Combination Figure 3 As shown, in this embodiment, the conveyor wheel 313 includes a set of first conveyor wheels 3131 and a set of second conveyor wheels 3132 arranged at intervals along the conveying direction. The first conveyor belt 312 is wound around the first conveyor wheels 3131, and the first conveyor wheels 3131 and the second conveyor wheels 3132 are connected in a driving connection.

[0026] The first conveyor belt 312 transmits power to the first conveyor wheel 3131 and also drives the material on the first conveyor wheel 3131 to move. In this embodiment, the first conveyor wheel 3131, the second conveyor wheel 3132, and a set of the second conveyor wheels 3132 are connected by a drive pulley and a drive belt (not shown), and there are two of each of the first conveyor wheel 3131 and the second conveyor wheel 3132.

[0027] In this embodiment, the conveying wheels 313 are arranged in pairs along the width direction of the conveying assembly 31, and the number of conveying wheels 313 on each side is 4, arranged along the conveying direction; The number of openings 321 is 12, including 4 first openings 3211 corresponding to the 2 pairs of conveying wheels 313 in the middle, and 4 pairs of second openings 3212 disposed on the outside of the openings 321. The first openings 3211 are arranged in a 2*2 square array, and each pair of second openings 3212 around the first openings 3211 are 90° to each other in the circumferential direction.

[0028] Based on the above structure, when switching postures, the posture switching drive component drives the tray 32 to rotate by an integer multiple of 90°.

[0029] Combination Figure 4 As shown, in this embodiment, the attitude switching drive assembly includes an attitude switching rotary motor 361 and an attitude switching telescopic cylinder 362. The support plate 32 is connected to the output shaft of the attitude switching rotary motor 361. The attitude switching rotary motor 361 is mounted on the telescopic assembly of the attitude switching telescopic cylinder 362. The attitude switching telescopic cylinder 362 is mounted on the mounting frame.

[0030] The attitude switching rotary motor 361 is used to perform angle rotation, and the attitude switching telescopic cylinder 362 is used to perform lifting and lowering.

[0031] Combination Figure 5 or Figure 6 In this embodiment, the centering device 37 includes: A pair of slidably arranged positioning frames 372, wherein the positioning frames 372 are provided with the limiting plate 3721; A drive rotor 371 is provided with a pair of transmission links 373, and the pair of transmission links 373 are respectively connected to a pair of positioning frames 372. The drive rotor 371 can rotate and drive a pair of limit plates 3721 to move synchronously toward the same side via a pair of transmission links 373, so as to achieve center alignment of the material that moves between the pair of limit plates 3721 in the conveying direction.

[0032] Based on the above structure, a single rotary driver (motor) can simultaneously drive a pair of limit plates 3721 to slide synchronously, thereby centered the material moving between the pair of limit plates 3721 in the conveying direction. This design offers advantages such as simple control and high reliability.

[0033] In this embodiment, the positioning frame 372 includes a pair of sliding rods 3723 that slide through the mounting frame, forming a pair of slide tracks.

[0034] Example 2 Combination Figure 6 As shown, in this embodiment, the transmission link 373 is rotatably connected to the positioning frame 372, and the rotation axis of the pair of transmission links 373 and the positioning frame 372 is coplanar with the rotation axis of the drive rotor 371; the rotation axis between the transmission link 373 and the positioning frame 372 corresponds to the center position of the slide of the positioning frame 372 in the width direction.

[0035] That is, the force applied by the transmission link 373 to the positioning frame 372 is at the center of the corresponding slide of the positioning frame 372, which can ensure the stability of driving the positioning frame 372 to slide. It should be noted that the center position of the slide of the positioning frame 372 is at the center position in the width direction. For example, if a pair of slides are provided, the center position is at the center position in the width direction on both sides of the pair of slides, that is, in the area where the symmetrical plane of the two slides is located; if only one slide is provided, the center position corresponds to the center position in the width direction of that slide.

[0036] Example 3 Based on Example 1, combined with Figure 1 As shown, in this embodiment, the limiting plate 3721 is disposed on both sides of the pallet 32, and the blocking member is disposed at the output end of the pallet 32 ​​corresponding to the conveying direction.

[0037] Positioning, alignment, centering, and posture switching are performed at one workstation, which has the advantages of good structural compactness, high execution efficiency, and the fact that the conveying component 31 does not need to be stopped during the execution process, and has the advantages of simple control system.

[0038] Combination Figure 4 As shown, in this embodiment, the attitude switching rotary motor 361 is installed below the pallet 32 ​​and corresponds to the rotation center of the pallet 32. The limiting plate 3721 is located at the center of both sides of the pallet 32. The slide rod 3723 on each side is symmetrically arranged with respect to the center of the pallet 32. Therefore, the rotation axis of the drive rotor 371 is offset from the center of the slide of the positioning frame 372 in the width direction.

[0039] Due to the limited installation location, the rotation axis of the drive rotor 371 will deviate from the center position of the slide rail of the positioning frame 372 in the width direction. If the transmission link 373 is still hinged to the positioning frame 372, the hinge point will also deviate from the center position of the slide rail of the positioning frame 372 in the width direction. This will cause the point of force and the direction of force application to move the positioning frame 372 to be too biased, which will accelerate the wear of the sliding contact position in engineering.

[0040] Combination Figure 5 As shown, in this embodiment, the rotation axis of the drive rotor 371 is offset from the center position of the slide rail of the positioning frame 372 in the width direction; The centering device 37 also includes a pair of rotatably mounted transmission arms 374; One side of the transmission arm 374 is rotatably connected to the transmission connecting rod 373, and the other side is slidably connected to the positioning frame 372; The transmission arm 374 has a rotary joint at the position of the sliding connection of the positioning frame 372, forming a double-pair connection of sliding and rotation; the sliding trajectory of the connection end of the transmission arm 374 corresponding to the positioning frame 372 corresponds to the center position of the slide rail of the main body of the positioning frame 372 in the width direction.

[0041] Based on the above structure, the transmission arm 374 is rotatably mounted on the frame on which the centering device 37 is installed. Driving the drive rotor 371 to rotate sequentially drives the transmission connecting rod 373 and the transmission arm 374, ultimately causing the positioning frame 372 to move in the sliding direction. By controlling the sliding trajectory of the transmission arm 374 corresponding to the connecting end of the positioning frame 372, which corresponds to the center position of the slide rail of the positioning frame 372 body in the width direction, it can be ensured that the force point acting on the movement of the positioning frame 372 is within a preset range of the center position of the slide rail of the positioning frame 372. Therefore, based on the above structure, the problem that when the rotation axis of the drive rotor 371 deviates from the center position of the slide rail of the positioning frame 372, the traditional transmission structure would cause the force point acting on the positioning frame 372 to deviate from the center of the slide rail of the positioning frame 372.

[0042] In this embodiment, the positioning frame 372 is provided with a transmission groove 3722, the extension direction of the transmission groove 3722 is perpendicular to the sliding direction of the positioning frame 372, and the transmission groove 3722 corresponds to the center position of the slide width direction of the positioning frame 372; the transmission arm 374 is provided with a transmission rod 3741 adapted to the width of the transmission groove 3722, the transmission rod 3741 is cylindrical, and the transmission rod 3741 is slidably disposed in the transmission groove 3722.

[0043] Based on this transmission principle, it can also be achieved by rotating and mounting a slider on the transmission arm 374, so that the slider is slidably connected to the positioning frame 372. The above structure has the advantage of being simple in design.

[0044] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can conceive of other specific embodiments of the invention without creative effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A material conveying posture switching device for a double-row parallel material conveyor, characterized in that, include: Conveying assembly (31) for conveying two rows of materials side by side; The positioning and alignment device includes a blocking member disposed on the conveying path of the conveying assembly (31), the blocking member being movably disposed for blocking a pair of side-by-side materials from aligning them in the conveying direction; A centering device (37) includes a pair of limiting plates (3721), which are arranged in pairs on both sides of the material conveying direction; the centering device (37) is used to drive the pair of limiting plates (3721) to move synchronously towards each other to push the pair of materials in parallel to be aligned in the center. The attitude switching actuator includes a pallet (32) and an attitude switching drive assembly. The attitude switching drive assembly is connected to the pallet (32) in a transmission manner. The pallet (32) is disposed on the conveying surface of the conveying assembly (31). The attitude switching drive assembly is used to drive the pallet (32) to lift and rotate horizontally by a preset angle to switch the attitude of the material. The conveying assembly (31) includes: a first conveyor belt (312) and a set of first pulleys (311), the first pulleys (311) being used to support the first conveyor belt (312) in conveying materials; The pallet (32) is located on one side of the first pulley (311); the conveying assembly (31) also includes a conveying wheel (313) located below the pallet (32), and the pallet (32) is provided with an opening (321) corresponding to the conveying wheel (313), and the openings (321) are arranged in a circumferential array corresponding to the angle of rotation of the pallet (32).

2. The material conveying posture switching device for a double-row parallel material conveyor according to claim 1, characterized in that: The conveyor wheel (313) includes a set of first conveyor wheels (3131) and a set of second conveyor wheels (3132) arranged at intervals along the conveying direction. The first conveyor belt (312) is wound around the first conveyor wheels (3131), and the first conveyor wheels (3131) and the second conveyor wheels (3132) are connected in a driving connection. The first conveyor belt (312) transmits power to the first conveyor wheel (3131) and also drives the material on the first conveyor wheel (3131) to move.

3. The material conveying posture switching device for a double-row parallel material conveyor according to claim 2, characterized in that: The conveying wheels (313) are arranged in pairs along the width direction of the conveying assembly (31), and the number of conveying wheels (313) on each side is 4, arranged along the conveying direction; The number of openings (321) is 12, including 4 first openings (3211) corresponding to the two middle pairs of conveyor wheels (313), and 4 pairs of second openings (3212) arranged outside the openings (321). The first openings (3211) are arranged in a 2*2 square array, and each pair of second openings (3212) around the first openings (3211) are 90° to each other in the circumferential direction.

4. The material conveying posture switching device for a double-row parallel material conveyor according to claim 1, characterized in that: The limiting plate (3721) is disposed on both sides of the pallet (32), and the blocking member is disposed at the output end of the pallet (32) corresponding to the conveying direction.

5. The material conveying posture switching device for a double-row parallel material conveyor according to claim 1, characterized in that: The attitude switching drive assembly includes an attitude switching rotary motor (361) and an attitude switching telescopic cylinder (362). The pallet (32) is connected to the output shaft of the attitude switching rotary motor (361). The attitude switching rotary motor (361) is mounted on the telescopic assembly of the attitude switching telescopic cylinder (362). The attitude switching telescopic cylinder (362) is mounted on the mounting frame.

6. The material conveying posture switching device for a double-row parallel material conveyor according to claim 1, characterized in that, The centering device (37) includes: A pair of slidably arranged positioning frames (372), wherein the positioning frames (372) are provided with the limiting plate (3721); A drive rotor (371) is provided with a pair of transmission links (373) rotatably mounted on the drive rotor (371), and the pair of transmission links (373) are respectively connected to a pair of positioning frames (372). The drive rotor (371) can rotate to drive a pair of limiting plates (3721) to move synchronously toward the same side via a pair of transmission links (373), so as to achieve center alignment of the material moving between the pair of limiting plates (3721) in the conveying direction.

7. The material conveying posture switching device for a double-row parallel material conveyor according to claim 6, characterized in that: The transmission link (373) is rotatably connected to the positioning frame (372), and the rotation axis of the pair of transmission links (373) and the positioning frame (372) is coplanar with the rotation axis of the drive rotor (371); the rotation axis between the transmission link (373) and the positioning frame (372) corresponds to the central position of the slide of the positioning frame (372) in the width direction.

8. The material conveying posture switching device for a double-row parallel material conveyor according to claim 6, characterized in that: The rotation axis of the drive rotor (371) is offset from the center position of the slide rail of the positioning frame (372) in the width direction; The centering device (37) also includes a pair of rotatably mounted transmission arms (374). One side of the transmission arm (374) is rotatably connected to the transmission connecting rod (373), and the other side is slidably connected to the positioning frame (372); The transmission arm (374) has a rotary joint at the position of sliding connection with the positioning frame (372); the sliding trajectory of the transmission arm (374) corresponding to the connection end of the positioning frame (372) corresponds to the central position of the slide rail of the main body of the positioning frame (372) in the width direction.

9. The material conveying posture switching device for a double-row parallel material conveyor according to claim 8, characterized in that: The positioning frame (372) is provided with a transmission groove (3722), the extension direction of the transmission groove (3722) is perpendicular to the sliding direction of the positioning frame (372), and the transmission groove (3722) corresponds to the center position of the width direction of the slide of the positioning frame (372); the transmission arm (374) is provided with a transmission rod (3741) adapted to the width of the transmission groove (3722), the transmission rod (3741) is cylindrical, and the transmission rod (3741) is slidably disposed in the transmission groove (3722).

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