A forklift fork assembly line capable of realizing forklift fork overturning

Abstract

The present application relates to the technical field of assembly line, and discloses a pallet fork assembly line capable of realizing pallet fork overturning, which comprises a conveying mechanism, an overturning mechanism and a stacking mechanism, the pallet fork is driven to move forward by the conveying mechanism and can be manually assembled during the movement, the first overturning assembly in the overturning mechanism can overturn the pallet fork for the first time, and the pallet fork is overturned from the first face upward to the second face upward, that is, the first face can be assembled first, and then the second face is assembled, after the assembly of the second face is completed, the second overturning assembly in the overturning mechanism overturns the pallet fork from the second face upward to the first face upward, which facilitates subsequent stacking by the stacking mechanism, and thus the automatic operation in the pallet fork assembly process and the automatic overturning of the pallet fork can be realized, the assembly efficiency of the pallet fork can be improved, the overturning precision of the pallet fork can be ensured, and thus the assembly precision of the pallet fork can be ensured.

Description

Technical Field

[0001] This invention relates to the technical field of fork assembly, and specifically to a fork assembly line that enables fork flipping. Background Technology

[0002] During the assembly of the forks, the forks need to be flipped to allow for assembly at different positions.

[0003] In existing technologies, fork assembly typically involves using a gantry crane or other robotic arms to grip and flip the forks. Since these forks need to be assembled onto other parts of the forklift and have a relatively large overall weight, using a gantry crane or robotic arm makes it difficult to adjust the flipping angle, meaning a good assembly position cannot be guaranteed. This requires repeated adjustments to the gantry crane and robotic arm, resulting in low fork assembly efficiency, high operator workload, and low assembly accuracy. Summary of the Invention

[0004] This invention addresses the aforementioned problems and aims to provide a fork assembly line that enables fork flipping. It provides equipment for fork assembly and enables automatic fork flipping and operation, significantly improving assembly efficiency and reducing labor intensity.

[0005] To achieve the above objectives, the present invention provides a fork assembly line capable of fork flipping, wherein the fork has a first surface and a second surface, comprising:

[0006] A conveying mechanism includes a support frame and a conveying chain disposed on the support frame. The conveying chain is laid symmetrically on both sides of the top of the support frame along the length direction of the support frame. The support frame has a loading end and a unloading end. The conveying chain passes through the loading end and the unloading end and can drive the forks to move from the loading end to the unloading end.

[0007] The flipping mechanism includes a first flipping component near the loading end and a second flipping component near the unloading end. Both the first flipping component and the second flipping component are located on the support frame between the loading end and the unloading end. When the fork is located at the loading end, the first surface of the fork faces upward. The first flipping component is used to flip the fork to the second surface facing upward, and the second flipping component is used to flip the fork to the first surface facing upward.

[0008] The first flipping assembly includes a first flipping frame rotatably connected to the support frame and a first clamping member located on the first flipping frame. The first flipping frame has two first openings for the forks to enter. The two first openings are respectively located on the side of the first flipping frame near the loading end and on the side away from the loading end. The first clamping member includes a first upper clamping plate located at the top of the first opening and a first lower clamping plate located at the bottom of the first opening. A first clamping space for clamping the forks is provided between the first upper clamping plate and the first lower clamping plate. The first upper clamping plate can be pressed down or the first lower clamping plate can be pressed up to reduce the first clamping space and clamp the forks.

[0009] The second flipping assembly includes a second flipping frame rotatably connected to the support frame and a second clamping member located on the second flipping frame. The second flipping frame has two second openings for the forks to enter. The two second openings are respectively located on two sides of the second flipping frame near the loading end and on two sides away from the loading end. The second clamping member includes a second upper clamping plate located at the top of the second opening and a second lower clamping plate located at the bottom of the second opening. A second clamping space for clamping the forks is provided between the second upper clamping plate and the second lower clamping plate. The second upper clamping plate can be pressed down or the second lower clamping plate can be pressed up to reduce the second clamping space and clamp the forks.

[0010] According to the fork assembly line that enables fork flipping described above, the first clamping member further includes a first clamping cylinder. The first lower clamping plate is vertically and vertically disposed at the bottom of the first opening through the first clamping cylinder. The first lower clamping plate can be lowered to be level with or below the horizontal height of the conveyor chain.

[0011] The bottom of the first upper clamping plate and the top of the first lower clamping plate are both provided with first pressure plates, which are made of elastic material.

[0012] According to the fork assembly line that enables fork flipping described above, the second clamping component further includes a second clamping cylinder. The second lower clamping plate is vertically and vertically disposed at the bottom of the second opening via the second clamping cylinder. The second lower clamping plate can be lowered to be level with or below the horizontal height of the conveyor chain.

[0013] The bottom of the second upper clamping plate and the top of the second lower clamping plate are both provided with second pressure plates, which are made of elastic material.

[0014] According to the fork assembly line that can realize fork flipping as described above, the first flipping component further includes a first flipping motor, a first drive rod, and a first reduction gear set. The first drive rod passes through the first flipping frame, and both ends of the first drive rod can be rotatably fixed to both sides of the support frame through support seats. The first flipping motor is connected to one end of the first drive rod through the first reduction gear set.

[0015] According to the fork assembly line that can realize fork flipping as described above, the second flipping component further includes a second flipping motor, a second drive rod, and a second reduction gear set. The second drive rod passes through the second flipping frame, and both ends of the second drive rod can be rotatably fixed to both sides of the support frame through support seats. The second flipping motor is connected to the two ends of the second drive rod through the second reduction gear set.

[0016] The fork assembly line capable of fork flipping, as described above, further includes a stacking mechanism. The stacking mechanism includes a lifting trolley and a translation chain disposed on the top of the lifting trolley. The translation chain is arranged on the top of the lifting trolley along the length direction of the support frame, and one end of the translation chain can extend into the unloading end and drive the forks located on the unloading end to move onto the lifting trolley.

[0017] According to the fork assembly line capable of fork flipping described above, the lifting trolley includes a support base, a support top frame located directly above the support base, and an inner fork arm and an outer fork arm connecting the support base and the support top frame. The inner side of the support base is provided with a first sliding groove, and the inner side of the support top frame is provided with a second sliding groove. The upper part of the inner fork arm is rotatably fixed in the second sliding groove, and the lower part of the inner fork arm is slidably connected to the first sliding groove via a first pulley. The upper part of the outer fork arm is slidably connected to the second sliding groove via a second pulley, and the lower part of the outer fork arm is rotatably fixed in the first sliding groove. The middle part of the outer fork arm is hinged to the middle part of the inner fork arm. The translation chain is laid on the top of the support top frame.

[0018] According to the fork assembly line that enables fork flipping described above, the conveying mechanism further includes a conveying motor, a drive shaft, and a main shaft fixed on the loading end and unloading end. Each end of the main shaft is provided with a first drive gear. The conveying chain can simultaneously mesh with the first drive gears on both main shafts. The drive shaft is rotatably fixed below the support frame. Each end of the drive shaft is provided with a second drive gear, and the middle of the main shaft is provided with a third drive gear. The conveying motor is connected to the drive shaft via a synchronous belt, and the second drive gear is connected to the third drive gear via a synchronous chain.

[0019] According to the fork assembly line described above that enables fork flipping, the feeding end is equipped with a feeding sensor. When the fork is fed to the feeding end, the feeding sensor can control the conveyor motor to work.

[0020] According to the fork assembly line that enables fork flipping described above, the conveyor chain includes a first chain and a second chain respectively disposed on both sides of the support frame. The height of the first chain is higher than the height of the second chain, and the end of the fork with the fork body rests on the first chain.

[0021] The present invention has the following beneficial effects:

[0022] 1. The conveyor chain can drive the forks to move forward. The assembler can stand on one side of the support frame to assemble the forks. During this process, the first flipping component can flip the forks from the first side facing up to the second side facing up for assembly in different positions. After the second side assembly is completed, the second flipping component can flip them back to the first side facing up for easy stacking. The overall automation level is high. The assembler only needs to perform the assembly, which can greatly improve the assembly efficiency. Moreover, the fork position is accurate, which can improve the assembly accuracy.

[0023] 2. A lifting trolley and a translation chain mounted on the lifting trolley are provided at the rear of the support frame. The translation chain can move the forks on the conveyor chain at the unloading end to the lifting trolley, which can realize automatic stacking of the forks, further reduce the labor intensity of the operators, and realize the automation of the assembly line equipment.

[0024] 3. The first tilting frame is provided with a first upper clamping plate and a first lower clamping plate. The first lower clamping plate is raised and lowered at the bottom of the first opening by a first clamping cylinder. That is, the distance between the first lower clamping plate and the first upper clamping plate can be adjusted to suit forks of different thicknesses, and the applicability is good.

[0025] 4. A first pressure plate made of elastic material is provided at the bottom of the first upper clamping plate and at the top of the first lower clamping plate. When clamping the forks, the first pressure plate will abut against the forks, thereby protecting the forks from damage.

[0026] 5. The first and second chains distributed on both sides of the support frame are at different heights. This helps to prevent the forks from tipping over on the conveyor chain when the weights at both ends of the forks are different. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0028] Figure 2This is a schematic diagram of the first flipping component structure in the embodiment;

[0029] Figure 3 This is a schematic diagram of the structure of the first clamping member in the embodiment;

[0030] Figure 4 This is an assembly diagram of the second flipping component, the support frame unloading end, and the stacking mechanism in the embodiment.

[0031] Figure 5 This is a schematic diagram of the stacking mechanism and the unloading end assembly of the support frame in an embodiment.

[0032] In the picture:

[0033] 1. Conveying mechanism; 11. Support frame; 12. Conveying chain; 121. First chain; 122. Second chain; 13. Conveying motor; 14. Drive shaft; 141. Second drive gear; 15. Main shaft; 151. First drive gear; 152. Third drive gear;

[0034] 2. Tilting mechanism; 21. First tilting assembly; 211. First tilting frame; 211a. First opening; 212. First upper clamping plate; 213. First lower clamping plate; 214. First clamping cylinder; 215. First pressure plate; 216. First tilting motor; 217. First drive rod; 218. First reduction gear; 22. Second tilting assembly; 221. Second tilting frame; 221a. Second opening; 222. Second upper clamping plate; 223. Second lower clamping plate; 224. Second clamping cylinder; 225. Second pressure plate; 226. Second tilting motor; 227. Second drive rod; 228. Second reduction gear set;

[0035] 3. Stacking mechanism; 31. Lifting trolley; 311. Support base frame; 311a. First chute; 312. Support top frame; 313. Inner fork arm; 313a. First pulley; 314. Outer fork arm; 314a. Second pulley; 32. Translation chain;

[0036] 4. Forks. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solution of the present invention. However, the invention is not limited to these embodiments.

[0038] like Figure 1-5As shown, a fork assembly line capable of fork flipping includes a conveying mechanism 1, a flipping mechanism 2, and a stacking mechanism 3. The conveying mechanism 1 drives the forks 4 forward, allowing for manual assembly during the forward movement. The first flipping component 21 in the flipping mechanism 2 flips the forks 4 from the first side facing up to the second side facing up, allowing assembly of the first side first, followed by the second side. After the second side is assembled, the second flipping component 22 in the flipping mechanism 2 flips the forks 4 from the second side facing up to the first side facing up, facilitating subsequent stacking by the stacking mechanism 3. This enables automatic operation and automatic flipping of the forks 4 during the assembly process, improving assembly efficiency and ensuring flipping accuracy, thus guaranteeing assembly precision.

[0039] Specifically, the fork 4 has a first surface and a second surface, which are two opposite surfaces. In this embodiment, the first surface of the fork 4 refers to the top surface of the fork 4, and the second surface of the fork 4 refers to the bottom surface of the fork 4.

[0040] The conveying mechanism 1 includes a support frame 11 and a conveying chain 12 mounted on the support frame 11. The conveying chain 12 is laid symmetrically on both sides of the top of the support frame 11 along its length. The support frame 11 has a loading end and a unloading section. The conveying chain 12 passes through the loading end and the unloading end and can drive the fork 4 from the loading end to the unloading end. The fork 4 can be gripped by a robot arm and placed on the conveying chain 12 located at the loading end. The fork 4 is then driven forward by the two conveying chains 12. In this embodiment, multiple support plates are fixed on the conveying chain 12. The top of the support plate can abut against the bottom of the fork 4. As the conveying chain 12 drives the support plate to move, it in turn drives the fork 4 to move together.

[0041] Furthermore, the conveying mechanism 1 also includes a conveying motor 13, a drive shaft 14, and a main shaft 15 fixed on the loading end and the unloading end. A first drive gear 151 is provided at both ends of the main shaft 15. The conveying chain 12 can simultaneously connect to the first drive gears 151 on both main shafts 15. Rotating one of the main shafts 15 drives the conveying chain 12 to rotate, thereby causing the forks 4 to move. Simultaneously, the drive shaft 14 is rotatably fixed below the support frame 11, and a second drive gear 141 is provided at both ends of the drive shaft 14. The length of the drive shaft 14 is shorter than the length of the main shaft 15. A third drive gear 152 is provided in the middle of the main shaft 15. The conveying motor 13 is connected to the drive shaft 14 via a synchronous belt, and the second drive gear 141 is connected to the third drive gear 152 via a synchronous chain. The conveying motor 13 drives the drive shaft 14 to rotate, and the drive shaft 14 drives the main shaft 15 to rotate, thereby realizing the movement of the conveying chain 12.

[0042] Furthermore, in order to achieve precise control of the conveyor motor 13, a feeding sensor is installed at the feeding end. When the fork 4 feeds to the feeding end, the feeding sensor can control the conveyor motor 13 to work, which can save energy and has a high degree of automation. The feeding sensor can be a photoelectric sensor or a contact sensor. If a contact sensor is used, when the fork 4 is transported to the feeding end, the fork 4 will come into contact with the contact sensor, thereby realizing the control of the conveyor motor 13.

[0043] The flipping mechanism 2 includes a first flipping component 21 near the loading end and a second flipping component 22 near the unloading end. Both the first flipping component 21 and the second flipping component 22 are located on the support frame 11 between the loading end and the unloading end. That is, the fork 4 passes through the first flipping component 21 and the second flipping component 22 in sequence. In this embodiment, the fork 4 is initially placed with its first face up, that is, its top face up. When the fork 4 is held by the robot at the loading end, the first face of the fork 4 is up. The first flipping component 21 is used to flip the fork 4 to its second face up, and the second flipping component 22 is used to flip the fork 4 to its first face up. A first assembly area is provided between the loading end and the first flipping component 21, where the top face of the fork 4 can be assembled. A second assembly area is provided between the first flipping component 21 and the second flipping component 22, where the bottom face of the fork 4 can be assembled. After the assembly is completed, the fork 4 is flipped to its top face up by the second flipping component 22, which facilitates subsequent stacking.

[0044] Furthermore, the first flipping assembly 21 includes a first flipping frame 211 rotatably connected to the support frame 11 and a first clamping member located on the first flipping frame 211. The first flipping frame 211 has two first openings 211a for the forks 4 to enter. The two first openings 211a are located on the side of the first flipping frame 211 closer to the loading end and the side away from the loading end, respectively. That is, the two first openings 211a are symmetrically arranged on both sides of the first flipping frame 211. When the transport chain drives the forks 4 to move forward, the forks 4 will enter the first openings 211a and be clamped by the first clamping member. Then, the first flipping frame 211 drives them to rotate, that is, rotate 180°, to achieve the flipping of the forks 4. Compared with the flipping of overhead cranes or robotic arms, its flipping accuracy is higher.

[0045] Furthermore, the first flipping assembly 21 also includes a first flipping motor 216, a first drive rod 217, and a first reduction gear 218 set. The first drive rod 217 passes through the first flipping frame 211, and both ends of the first drive rod 217 can be rotatably fixed to both sides of the support frame 11 via support seats. The first flipping motor 216 is connected to one end of the first drive rod 217 through the first reduction gear 218 set, that is, the first flipping motor 216 provides power to the first drive rod 217, and the rotation of the first drive rod 217 drives the first flipping frame 211 to rotate. The first reduction gear 218 set can reduce the speed of the first drive rod 217, thereby ensuring that the speed of the first flipping frame 211 is slower and the rotation is more stable.

[0046] Furthermore, the first clamping component includes a first upper clamping plate 212 located at the top of the first opening 211a, a first lower clamping plate 213 located at the bottom of the first opening 211a, and a first clamping cylinder 214. The first lower clamping plate 213 is vertically and flexibly positioned at the bottom of the first opening 211a via the first clamping cylinder 214. The first lower clamping plate 213 can be lowered to be level with or below the horizontal height of the conveyor chain 12, which facilitates the fork 4 to enter between the first upper clamping plate 212 and the first lower clamping plate 213, and then the first clamping cylinder 214 drives the first lower clamping plate. Plate 213 moves upward until the fork 4 simultaneously abuts against both the first lower clamping plate 213 and the first upper clamping plate 212. At this point, the first lower clamping plate 213 and the first upper clamping plate 212 serve to clamp and position the fork. Since the distance between the first lower clamping plate 213 and the first upper clamping plate 212 is flexible, it can be used for forks 4 of different thicknesses. In order to achieve elastic clamping of the fork 4, a first pressure plate 215 is provided at the bottom of the first upper clamping plate 212 and the top of the first lower clamping plate 213. The first pressure plate 215 is made of elastic material, which can prevent damage to the fork 4 caused by rigid clamping.

[0047] In this embodiment, the fork 4 is clamped by the first lower clamping plate 213 rising. Of course, the fork 4 can also be clamped by the first upper clamping plate 212 pressing down. This should not exceed the scope of this application.

[0048] Furthermore, the second tilting assembly 22 includes a second tilting frame 221 rotatably connected to the support frame 11 and a second clamping member located on the second tilting frame 221. The second tilting frame 221 has two second openings 221a for the forks 4 to enter. The two second openings 221a are located on the two sides of the second tilting frame 221 near the loading end and on the two sides away from the loading end, respectively. That is, the two second openings 221a are symmetrically arranged on both sides of the second tilting frame 221. When the transport chain drives the forks 4 to move forward, the forks 4 will enter the second openings 221a and be clamped by the second clamping member. Then, the second tilting frame 221 drives them to rotate, that is, rotate 180°, to achieve the tilting of the forks 4. Compared with the tilting of overhead cranes or robotic arms, its tilting accuracy is higher.

[0049] Furthermore, the second flipping assembly 22 also includes a second flipping motor 226, a second drive rod 227, and a second reduction gear set 228. The second drive rod 227 passes through the second flipping frame 221, and both ends of the second drive rod 227 can be rotatably fixed to both sides of the support frame 11 via support seats. The second flipping motor 226 is connected to both ends of the second drive rod 227 through the second reduction gear set 228, that is, the second flipping motor 226 provides power to the second drive rod 227, and the rotation of the second drive rod 227 drives the second flipping frame 221 to rotate. The second reduction gear set 228 can reduce the speed of the second drive rod 227, thereby ensuring that the speed of the second flipping frame 221 is slower and the rotation is more stable.

[0050] Furthermore, the second clamping component includes a second upper clamping plate 222 located at the top of the second opening 221a, a second lower clamping plate 223 located at the bottom of the second opening 221a, and a second clamping cylinder 224. The second lower clamping plate 223 is vertically and flexibly positioned at the bottom of the second opening 221a via the second clamping cylinder 224. The second lower clamping plate 223 can be lowered to be level with or below the horizontal height of the conveyor chain 12, which facilitates the fork 4 to enter between the second upper clamping plate 222 and the second lower clamping plate 223, and then the second lower clamping plate is driven by the second clamping cylinder 224. Plate 223 moves upward until the fork 4 simultaneously abuts against the second lower clamping plate 223 and the second upper clamping plate 222. At this time, the second lower clamping plate 223 and the second upper clamping plate 222 play a clamping and positioning role. Since the distance between the second lower clamping plate 223 and the second upper clamping plate 222 is flexible, it can be used for forks 4 of different thicknesses. In order to achieve elastic clamping of the fork 4, a second pressure plate 225 is provided at the bottom of the second upper clamping plate 222 and the top of the second lower clamping plate 223. The second pressure plate 225 is made of elastic material, which can avoid damage to the fork 4 caused by rigid clamping.

[0051] In this embodiment, the fork 4 is clamped by the second lower clamping plate 223 rising. Of course, the fork 4 can also be clamped by the second upper clamping plate 222 pressing down, which should not exceed the scope of this application.

[0052] The stacking mechanism 3 includes a lifting trolley 31 and a translation chain 32 set on the top of the lifting trolley 31. The translation chain 32 is arranged on the top of the lifting trolley 31 along the length of the support frame 11, that is, the translation chain 32 is arranged in the same direction as the conveyor chain 12. One end of the translation chain 32 can extend into the unloading end and drive the fork 4 located on the unloading end to move to the lifting trolley 31. The fork 4 moves with the conveyor chain 12 to the unloading end. If it continues to move, the fork 4 will fall onto the translation chain 32. The translation chain 32 will drive the fork 4 to move to the top of the lifting trolley 31. After placement, the lifting trolley 31 can be lowered to drive the fork 4 to fall, making it easy to pick up the fork 4.

[0053] Furthermore, the lifting trolley 31 includes a supporting base frame 311, a supporting top frame 312 located directly above the supporting base frame 311, and an inner fork arm 313 and an outer fork arm 314 connecting the supporting base frame 311 and the supporting top frame 312. The inner side of the supporting base frame 311 is provided with a first sliding groove 311a, and the inner side of the supporting top frame 312 is provided with a second sliding groove. The upper part of the inner fork arm 313 is rotatably fixed in the second sliding groove, and the lower part of the inner fork arm 313 is slidably connected to the first sliding groove 311a via a first pulley 313a. The outer fork arm 314... The upper part is slidably connected to the second slide groove via the second pulley 314a. The lower part of the outer fork arm 314 is rotatably fixed in the first slide groove 311a, and the middle part of the outer fork arm 314 is hinged to the middle part of the inner fork arm 313. The translation chain 32 is laid on the top of the support frame 312. When it is necessary to lower, the inner fork arm 313 and the outer fork arm 314 rotate. The lower part of the inner fork arm 313 moves away from the outer fork arm 314, and the upper part of the outer fork arm 314 moves away from the inner fork arm 313, so as to realize the lowering of the support frame 312.

[0054] Furthermore, the conveyor chain 12 includes a first chain 121 and a second chain 122 respectively disposed on both sides of the support frame 11. The height of the first chain 121 is higher than the height of the second chain 122. The end of the fork 4 with the fork 4 body rests on the first chain 121. Through the height difference between the first chain 121 and the second chain 122, the end of the fork 4 with the fork 4 body is higher, that is, the end with the greater weight is higher, which can prevent the fork 4 from tilting on the conveyor chain 12.

[0055] The technical solution of the present invention has been described in detail above with reference to the accompanying drawings. The described embodiments are used to help understand the concept of the present invention. The specific embodiments described herein are merely illustrative examples of the spirit of the present invention. Those skilled in the art to which this invention pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0056] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0057] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A fork assembly line capable of fork flipping, wherein the forks have a first surface and a second surface, characterized in that, include: A conveying mechanism includes a support frame and a conveying chain disposed on the support frame. The conveying chain is laid symmetrically on both sides of the top of the support frame along the length direction of the support frame. The support frame has a loading end and a unloading end. The conveying chain passes through the loading end and the unloading end and can drive the forks to move from the loading end to the unloading end. The flipping mechanism includes a first flipping component near the loading end and a second flipping component near the unloading end. Both the first flipping component and the second flipping component are located on the support frame between the loading end and the unloading end. When the fork is located at the loading end, the first surface of the fork faces upward. The first flipping component is used to flip the fork to the second surface facing upward, and the second flipping component is used to flip the fork to the first surface facing upward. The first flipping assembly includes a first flipping frame rotatably connected to the support frame and a first clamping member located on the first flipping frame. The first flipping frame has two first openings for the forks to enter. The two first openings are respectively located on the side of the first flipping frame near the loading end and on the side away from the loading end. The first clamping member includes a first upper clamping plate located at the top of the first opening and a first lower clamping plate located at the bottom of the first opening. A first clamping space for clamping the forks is provided between the first upper clamping plate and the first lower clamping plate. The first upper clamping plate can be pressed down or the first lower clamping plate can be pressed up to reduce the first clamping space and clamp the forks. The second flipping assembly includes a second flipping frame rotatably connected to the support frame and a second clamping member located on the second flipping frame. The second flipping frame has two second openings for the forks to enter. The two second openings are respectively located on two sides of the second flipping frame near the loading end and on two sides away from the loading end. The second clamping member includes a second upper clamping plate located at the top of the second opening and a second lower clamping plate located at the bottom of the second opening. A second clamping space for clamping the forks is provided between the second upper clamping plate and the second lower clamping plate. The second upper clamping plate can be pressed down or the second lower clamping plate can be pressed up to reduce the second clamping space and clamp the forks.

2. The fork assembly line capable of fork flipping according to claim 1, characterized in that, The first clamping member further includes a first clamping cylinder. The first lower clamping plate is vertically and vertically disposed at the bottom of the first opening via the first clamping cylinder. The first lower clamping plate can be lowered to be level with or below the horizontal height of the conveyor chain. The bottom of the first upper clamping plate and the top of the first lower clamping plate are both provided with first pressure plates, which are made of elastic material.

3. A fork assembly line capable of fork flipping according to claim 1 or 2, characterized in that, The second clamping member also includes a second clamping cylinder. The second lower clamping plate is vertically and vertically disposed at the bottom of the second opening via the second clamping cylinder. The second lower clamping plate can be lowered to be level with or below the horizontal height of the conveyor chain. The bottom of the second upper clamping plate and the top of the second lower clamping plate are both provided with second pressure plates, which are made of elastic material.

4. A fork assembly line capable of fork flipping according to claim 1, characterized in that, The first flipping assembly further includes a first flipping motor, a first drive rod, and a first reduction gear set. The first drive rod passes through the first flipping frame, and both ends of the first drive rod can be rotatably fixed to both sides of the support frame via support seats. The first flipping motor is connected to one end of the first drive rod via the first reduction gear set.

5. A fork assembly line capable of fork flipping according to claim 1 or 4, characterized in that, The second flipping assembly further includes a second flipping motor, a second drive rod, and a second reduction gear set. The second drive rod passes through the second flipping frame, and both ends of the second drive rod can be rotatably fixed to both sides of the support frame via support seats. The second flipping motor is connected to both ends of the second drive rod via the second reduction gear set.

6. A fork assembly line capable of fork flipping according to claim 1, characterized in that, It also includes a stacking mechanism, which includes a lifting trolley and a translation chain disposed on the top of the lifting trolley. The translation chain is arranged on the top of the lifting trolley along the length direction of the support frame, and one end of the translation chain can extend into the unloading end and drive the forks located on the unloading end to move onto the lifting trolley.

7. A fork assembly line capable of fork flipping according to claim 6, characterized in that, The lifting trolley includes a supporting base frame, a supporting top frame located directly above the supporting base frame, and an inner fork arm and an outer fork arm connecting the supporting base frame and the supporting top frame. The inner side of the supporting base frame is provided with a first sliding groove, and the inner side of the supporting top frame is provided with a second sliding groove. The upper part of the inner fork arm is rotatably fixed in the second sliding groove, and the lower part of the inner fork arm is slidably connected to the first sliding groove via a first pulley. The upper part of the outer fork arm is slidably connected to the second sliding groove via a second pulley, and the lower part of the outer fork arm is rotatably fixed in the first sliding groove. The middle part of the outer fork arm is hinged to the middle part of the inner fork arm. The translation chain is laid on the top of the supporting top frame.

8. A fork assembly line capable of fork flipping according to claim 1, characterized in that, The conveying mechanism also includes a conveying motor, a drive shaft, and a main shaft fixed on the loading end and the unloading end. Each end of the main shaft is provided with a first drive gear. The conveying chain can simultaneously mesh with the first drive gears on both main shafts. The drive shaft is rotatably fixed below the support frame. Each end of the drive shaft is provided with a second drive gear. The middle of the main shaft is provided with a third drive gear. The conveying motor is connected to the drive shaft via a synchronous belt. The second drive gear is connected to the third drive gear via a synchronous chain.

9. A fork assembly line capable of fork flipping according to claim 8, characterized in that, The feeding end is equipped with a feeding sensor. When the forks feed material to the feeding end, the feeding sensor can control the conveyor motor to work.

10. A fork assembly line capable of fork flipping according to claim 1, characterized in that, The conveyor chain includes a first chain and a second chain respectively disposed on both sides of the support frame. The height of the first chain is higher than the height of the second chain, and the fork with the fork body rests on the first chain.

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