A material handling trolley for warehousing

Abstract

The present application relates to the technical field related to logistics machinery, and discloses a material handling trolley for warehousing. In order to solve the problem that goods are difficult to load and unload due to excessive friction on the fork, a conveyor chain is arranged on the traditional fork, so that when the goods are placed on the conveyor chain, the conveyor chain is used to lift the goods and keep them relatively away from the surface of the fork, and the conveyor chain is combined with the driven sprocket and the driving sprocket so that the conveyor chain can drive the goods to move freely on the surface of the fork, thereby avoiding the friction between the goods and the fork by transporting the goods using the conveyor chain, making it easier to load and unload the goods, and finally achieving the effect of fork sprocket type loading and unloading of goods.

Description

Technical Field

[0001] The present application relates to the technical field related to logistics machinery, and in particular to a material handling trolley for warehousing. Background Art

[0002] Warehousing material handling trolleys are referred to as warehouse forklifts. They are mainly designed for handling goods in warehouses. Warehouse forklifts play a pivotal role in warehouses. They can lift and carry goods from the ground to the shelves, or carry goods on the shelves to the ground for loading and unloading. When tidying up the warehouse, forklifts can also play a role in tidying up the goods, so that the goods can be arranged on the shelves in a more orderly manner, thereby improving the efficiency and utilization of storage.

[0003] There is a significant problem with traditional forklifts when loading and unloading goods. That is, the design of the fork frame surface results in a relatively large contact area with the goods. This large contact area not only increases the friction during the forklift loading and unloading process, but also makes it quite difficult to load and unload materials directly from the fork frame. This difficulty not only affects the efficiency of loading and unloading, but also makes it difficult for the trolley to unload materials quickly and efficiently. In actual operation, this may lead to a waste of time, increase labor costs, and even in some cases may cause damage to the goods, further increasing costs. Therefore, improving the design of the fork frame of traditional forklifts and reducing the contact area with the goods is a necessary measure to improve loading and unloading efficiency and reduce costs.

[0004] At present, in order to cope with the difficulties of cargo handling and storage, the common method of stacking goods on pallets for handling is adopted in the market. However, although this solution has improved the handling efficiency to a certain extent, it has also brought significant problems: the use of pallets has increased sharply during the storage process. Especially in a busy storage environment, goods need to be piled up on the shelves in large quantities and densely, which inevitably increases the frequency of use and load of pallets. Long-term load-bearing and friction have caused the loss rate of pallets to increase significantly, and pallets are often damaged and scrapped. This not only leads to frequent pallet replacement, but also causes maintenance costs to continue to rise. The increase in the use of pallets not only means more procurement costs, but also involves time costs, labor costs and other aspects during the replacement and maintenance process. The superposition of these costs directly leads to a significant increase in storage costs. Summary of the invention

[0005] The present application proposes a material handling trolley for storage, which has the advantages of a fork sprocket type and is used to solve the problem in the above background technology that the goods are difficult to load and unload due to excessive friction on the fork.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a material handling cart for warehousing, comprising: a control console, controlling the movement of the vehicle body and the lifting / deflection of the fork on the guide frame; a driving sprocket and a driven sprocket, the driving sprocket being movably installed on the inner side of the fork and close to one end of the guide frame, the driven sprocket being movably installed on the other end of the fork, and the driven sprocket and the driving sprocket being connected by a conveyor chain transmission.

[0007] Furthermore, a fork head is fixedly connected to the end of the fork, and the inclined surface of the fork head is tangent to the outer side of the driven sprocket.

[0008] Furthermore, it also includes: a driven gear, which is coaxially fixedly connected to the driving sprocket; a guide frame, which is movably installed on one side of the fork, and a driving gear meshing with the driven gear is movably installed at the end, and the driving gear is located directly below the driven gear; and a grounding wheel, which is coaxially fixedly connected to the driving gear.

[0009] Furthermore, there are two cargo forks, and the ground contacting wheels on the two cargo forks are connected through a linkage rod transmission.

[0010] Furthermore, it also includes: a supporting slide, which is movably installed on the inner side of the fork and close to the side of the driving sprocket, and is located on the inner side of the conveyor chain; a chain head, which is fixed to the middle part of the bottom side of the supporting slide; a limit spring, which is arranged between the top of the supporting slide and the inner side of the fork; a supporting head, which is fixed to one end of the guide frame and is located below the supporting slide.

[0011] Furthermore, the outer side of the driven sprocket is higher than the surface of the fork, and the outer side of the driving sprocket is tangent to the surface of the fork.

[0012] Furthermore, an intermediate sprocket located above the top of the chain is movably installed in the middle of the supporting slide; a limiting tooth row meshing with the outer teeth of the intermediate sprocket is fixedly connected to the inner side of the fork, and an adjusting tooth row symmetrical to the limiting tooth row is movably installed on the inner side of the fork; a driven telescopic tube is fixedly connected to the back of the adjusting tooth row, and one end of the driven telescopic tube is fixedly connected to the inner side of the fork, and a driven spring is sleeved on the outer side of the driven telescopic tube; a driving telescopic tube is fixedly connected to the bottom of the supporting slide, and the bottom of the driving telescopic tube is fixed on the fork, and the driving telescopic tube and the driven telescopic tube are connected through an air pipe; an adjusting plate located below the driven telescopic tube is fixedly connected to the back of the adjusting tooth row, and an adjusting groove is opened in the adjusting plate, and a guide roller extending into the adjusting groove is fixedly connected to the middle of the guide frame.

[0013] Furthermore, the diameter of the driving telescopic tube is generally 3-6 times the diameter of the driven telescopic tube.

[0014] Furthermore, a damping hole communicating with the outside is formed at one end of the driven telescopic tube.

[0015] Furthermore, the shape of the adjustment groove is "7"-shaped, and an anti-return groove is arranged at the top of the adjustment groove, and an anti-slip groove is arranged at the bottom, and both the anti-return groove and the anti-slip groove are arc-shaped grooves.

[0016] The present invention has the following beneficial effects:

[0017] The present application provides a material handling trolley for storage, which is innovatively designed based on the traditional fork. A conveyor chain is set on the fork to change the contact mode between the goods and the fork. When the goods are placed on the conveyor chain, the chain can quickly and smoothly lift the goods and keep them relatively away from the surface of the fork. This lifting process not only reduces the direct contact area between the goods and the fork, but also reduces the friction between the two, thereby greatly improving the loading and unloading efficiency.

[0018] In order to realize the free movement of goods on the fork surface, the trolley is also equipped with a driven sprocket and a driving sprocket. The sprocket plays the role of supporting and guiding the chain. This combination of sprocket and chain enables the conveyor chain to flexibly drive the goods to move back and forth on the fork surface, easily realizing the precise positioning and rapid loading and unloading of goods.

[0019] By using a conveyor chain to transport goods, the material handling trolley for storage successfully avoids direct friction between the goods and the forks, which not only reduces the loss of goods, but also improves the smoothness and efficiency of loading and unloading operations. In addition, due to the strength and durability of the chain, this trolley also has a high load capacity and service life, and can cope with material handling needs in various storage environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0021] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure;

[0023] Figure 2 It is a schematic diagram of the internal planar cross-sectional structure of the fork;

[0024] Figure 3 for Figure 2 The enlarged structural diagram at E in the middle;

[0025] Figure 4 This is a schematic diagram of the installation position of the drive telescopic tube in the fork;

[0026] Figure 5 This is a schematic diagram of the installation position of the ground contact wheel in the fork;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure after the guide frame and other components are assembled;

[0028] Figure 7 It is a schematic diagram of the connection between the driven gear and the driving sprocket;

[0029] Figure 8 A schematic diagram of the three-dimensional structure after the support slide and other components are assembled;

[0030] Fig. 9 A schematic diagram of the three-dimensional structure for adjusting the gear row and its related components;

[0031] Fig.10 This is a schematic diagram of the cargo being placed on the fork for transportation / fixation.

[0032] In the figure: 1, vehicle body; 2, control console; 3, guide frame; 4, fork; 5, linkage rod; 6, conveyor chain; 7, fork head; 8, driven sprocket; 9, driving sprocket; 10, supporting slide; 11, intermediate sprocket; 12, chain head; 13, limit gear row; 14, driving telescopic tube; 15, adjusting gear row; 16, adjusting plate; 160, adjusting groove; 161, anti-return groove; 162, anti-slip groove; 17, guide roller; 18, driven telescopic tube; 180, damping hole; 19, driven spring; 20, air pipe; 21, limit spring; 22, guide frame; 220, supporting head; 23, grounding wheel; 24, driven gear; 25, driving gear. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Embodiment 1

[0034] See also Figure 1 It can be seen that the vehicle body 1 is controlled to move by a control console 2 arranged on the top, and the control console 2 also controls the fork 4 on the guide frame 3 to rise and fall, so that when there is cargo to be transported, the fork 4 is moved to the required position through the vehicle body 1, and the cargo to be transported is loaded and transported to the destination using the fork 4.

[0035] During the transportation of goods, the friction of the goods on the surface of the fork 4 is relatively large, which makes it difficult for the goods to move on the fork 4, thus reducing the efficiency of loading and unloading. In order to solve this problem, the first embodiment combines Figure 2It can be clearly seen that a driving sprocket 9 close to the guide frame 3 is movably installed at the inner end of the fork 4, and a driven sprocket 8 is movably installed at the other end. The driven sprocket 8 and the driving sprocket 9 are connected by a conveyor chain 6, and the conveyor chain 6 is higher than the surface of the fork 4. When the vehicle body 1 loads and unloads goods through the fork 4, the goods to be transported are shoveled onto the conveyor chain 6 above the fork 4, and the goods placed on the conveyor chain 6 will not contact the fork 4, and there will be no contact friction between the fork 4 and the goods. At the same time, the conveyor chain 6 is supported by the driven sprocket 8 and the driving sprocket 9, so that the conveyor chain 6 is relatively far away from the surface of the fork 4, so that when the conveyor chain 6 is loaded with goods, the fork 4 is pushed forward by the vehicle body 1. The goods placed on the conveyor chain 6 will cause the conveyor chain 6 to have a tendency to move to the right, and the driven sprocket 8 and the driving sprocket 9 rotate clockwise, with the direction referenced. Figure 2 , thereby ensuring low resistance transportation of goods on the conveying chain 6, thereby accelerating the loading efficiency of goods. Similarly, when the goods on the conveying chain 6 need to be unloaded, the goods moving outward will cause the driven sprocket 8 and the driving sprocket 9 to rotate counterclockwise, thereby making it easier to unload the goods outward.

[0036] Since the existence of the driven sprocket 8 causes the conveying chain 6 to be higher than the surface of the fork 4, in actual application, combined with Figure 2 It can be clearly seen that the end of the fork 4 is fixedly connected with a fork head 7, and the inclined surface of the fork head 7 is tangent to the outer side of the driven sprocket 8. The fork head 7 is used to shovel the bottom of the goods, thereby ensuring that when the fork 4 moves toward the direction of the goods, the bottom of the goods is shoveled by the fork head 7, so that the goods will not be blocked from moving due to the protrusion of the driven sprocket 8 during the process of being transported to the conveyor chain 6.

[0037] It can be clearly seen that the fork 4 described in detail in the first embodiment not only has the basic function of directly cooperating with the pallet to realize the basic function of cargo handling, but also realizes the function of handling goods without pallets by installing a conveyor chain 6 that can move flexibly and autonomously on its surface. On the basis of maintaining and optimizing the efficiency of the existing fork 4 in handling pallet goods, we have further expanded its application scenarios through the improvement and upgrading of the fork, so that it can efficiently complete the task of handling goods without pallets, thereby greatly improving the overall cargo handling efficiency. This innovative design not only enriches the functionality of the fork, but also brings more convenient and efficient solutions to the logistics and handling industry. Embodiment 2

[0038] For further improvements based on Example 1, please refer to Figure 5-Figure 7It can be seen that the driven gear 24 is coaxially fixed with the driving sprocket 9, and the driven gear 24 is placed in the square groove opened on the side of the fork 4. When the driven gear 24 rotates, the driving sprocket 9 will rotate synchronously.

[0039] The guide frame 22 is movably mounted on one side of the fork 4. Figure 6 It can be seen that the guide frame 22 can move up and down on the side of the fork 4 through the slider arranged in the middle, and the driving gear 25 is movably installed on the end of the guide frame 22. Therefore, it can be seen that the driving gear 25 can move up and down on the side of the fork 4 following the guide frame 22. Figure 5 and Figure 6 It can also be seen that the driving gear 25 is located directly below the driven gear 24. When the guide frame 22 drives the driving gear 25 downward, the driving gear 25 and the driven gear 24 are away from each other, and the two do not engage in transmission; similarly, when the guide frame 22 moves upward and pushes the driving gear 25 close to the driven gear 24, the driving gear 25 and the driven gear 24 will eventually engage with each other, so that the driving gear 25 can rotate simultaneously with the driving sprocket 9 based on the driven gear 24.

[0040] For the driving gear 25, Figure 6 It can be clearly seen that the grounding wheel 23 is coaxially fixedly connected to the driving gear 25, and the size of the grounding wheel 23 is larger than the driving gear 25. When the fork 4 needs to load the goods, the fork 4 on the guide frame 3 is controlled to move downward through the control console 2, so that the end of the fork head 7 contacts the ground or the plane where the goods are located. At the same time, when the driving gear 25 and the driven gear 24 are meshed, the grounding wheel 23 with a rubber outer ring will press on the ground.

[0041] When the fork 4 is pushed forward, the fork head 7 is used to shovel the goods in the direction of the conveyor chain 6 until the goods are conveyed to the conveyor chain 6. On this basis, when the fork 4 is pushed forward, the reference Figure 5 It can be known that the grounding wheel 23 will rotate counterclockwise through contact with the ground, thereby causing the driving gear 25 coaxially fixed thereto to rotate counterclockwise. The counterclockwise rotation of the driving gear 25 causes the driven gear 24 meshing with the external teeth to rotate clockwise. Finally, the driven gear 24 will drive the driving sprocket 9 coaxial therewith to rotate synchronously clockwise, thereby causing the goods on the conveying chain 6 to move toward the direction close to the guide rail frame 3.

[0042] Similarly, when the goods are unloaded, the ground-contacting wheels 23 in contact with the ground will rotate in the opposite direction, and finally the conveying chain 6 will push the goods to move away from the guide rail frame 3, thereby realizing the unloading of the goods.

[0043] It can be seen that the second embodiment can adapt to the movement of the fork 4 when the goods move onto the conveyor chain 6 through the arrangement of the grounding wheel 23, so as to meet the requirements of loading and unloading of the goods on the conveyor chain 6.

[0044] It can be known from practical work that the number of forks 4 is at least two. This application takes two as an example, and the specific number is not limited to this. Figure 1 It can be seen that the grounding wheels 23 on the two forks 4 are connected by a linkage rod 5. It should be noted that the linkage rod 5 can be extended and retracted and transmit torque, so as to ensure that when the linkage rod 5 drives the conveyor chain 6 to move, the conveyor chains 6 on the two forks 4 can move synchronously, avoiding the phenomenon that the goods on the forks 4 are offset when the conveyor chains 6 move due to the asynchronous movement speed of the two conveyor chains 6. On the other hand, since the linkage rod 5 can be retracted, when it is necessary to adjust the distance between the two forks 4, the two grounding wheels 23 can still be kept in synchronous movement. Embodiment 3

[0045] Further improvement on the basis of the second embodiment, in order to prevent the goods from being placed on the conveyor chain 6 and being transported by the vehicle body 1, due to the lack of a limiting component in the conveyor chain 6, it is easy for the vehicle body 1 to move, and the inertia of the goods and other factors force the conveyor chain 6 to move, and finally cause the goods to fall. This third embodiment further explores this problem, please refer to Figure 2-Figure 4 as well as Figure 8 It can be clearly seen that a support slide 10 is movably mounted on the inner side of the fork 4 near the driving sprocket 9, and the support slide 10 is located on the inner side of the conveying chain 6. Figure 8 It can be seen that there is a chain head 12 fixedly connected by bolts on the bottom middle side of the support slide 10. Since the support slide 10 can only move vertically up and down along the inner side of the fork 4, when the support slide 10 moves downward, the chain head 12 fixed at the lower middle part of the support slide 10 will approach the conveyor chain 6 until the chain head 12 is against the conveyor chain 6, thereby limiting the movement of the conveyor chain 6.

[0046] A limiting spring 21 is connected between the top of the supporting slide 10 and the inner top of the fork 4. The elastic force of the limiting spring 21 will make the supporting slide 10 always have a tendency to move downward, and the elastic force of the limiting spring 21 can be used to stably support the chain head 12 on the conveying chain 6, thereby further limiting the movement of the conveying chain 6.

[0047] from Figure 6 It can be seen that one end of the guide frame 22 is fixedly connected to a support head 220 in a direction away from the driving gear 25. Figure 5It can be seen that the support head 220 is located below the support slide 10. Since the support slide 10 and the guide frame 22 can only move vertically up and down on the fork 4, when the grounding wheel 23 is pressed against the ground and the driving gear 25 and the driven gear 24 are engaged, the support slide 10 is pushed by the support head 220 to compress the limit spring 21 and separate the chain head 12 from the conveying chain 6, thereby releasing the movement restriction of the conveying chain 6.

[0048] In actual application of the third embodiment, when the cargo needs to be loaded, the fork 4 is controlled to press toward the ground through the control console 2, and the cargo is shoveled through the fork head 7. The grounding wheel 23 is pressed to make the driving gear 25 and the driven gear 24 mesh, and at the same time, the support head 220 pushes the support carriage 10 upward to compress the limit spring 21, and the support carriage 10 pulls the chain head 12 away from the conveying chain 6 under the fork 4, and at this time, the chain head 12 will not interfere with the movement of the conveying chain 6.

[0049] As the fork 4 moves forward, the grounding wheel 23 drives the conveying chain 6 to move, so that the goods are conveyed to the conveying chain 6.

[0050] Afterwards, when the fork 4 is lifted upward by the control console 2, the support carriage 10 will move downward by the push of the limit spring 21, which will push the chain head 12 toward the conveyor chain 6 on the one hand, and push the support head 220 downward by the limit spring 21 on the other hand, so that the guide frame 22 pulls the driving gear 25 away from the driven gear 24, thereby cutting off the power transmission between the two. Since the chain head 12 will eventually press against the conveyor chain 6 due to the elastic force of the limit spring 21, the movement of the conveyor chain 6 is restricted. This ensures that when the goods are transported on the conveyor chain 6, the conveyor chain 6 will not move due to inertia or other factors, causing the goods to fall accidentally.

[0051] Finally, the control console 2 controls the vehicle body 1 to transport the cargo on the fork 4 to the designated area, and after the fork 4 moves downward, the grounding wheel 23 contacts the ground again, thereby completing the unloading of the cargo on the conveying chain 6 . Embodiment 4

[0052] Further improvements based on Example 3, in order to further improve the safety of goods during transportation, please refer to Figure 2 It can be clearly seen that the outer side of the driven sprocket 8 is higher than the surface of the fork 4, and the outer side of the driving sprocket 9 is tangent to the surface of the fork 4, so that the conveying chain 6 above the fork 4 is in a relatively inclined state, thereby ensuring that when the goods are on the conveying chain 6, the inclined conveying chain 6 can further prevent the goods from moving toward the end of the fork 4, thereby reducing the risk of goods falling.

[0053] Furthermore, when the fourth embodiment is implemented, the conveyor chain 6 is not tightened. Therefore, in order to ensure that the conveyor chain 6 has sufficient strength to support the goods during transportation, Figure 3 and Figure 8 It can be seen that the middle part of the supporting slide 10 is movably installed with an intermediate sprocket 11 located just above the chain head 12. When the grounding wheel 23 pushes the driving gear 25 to engage with the driven gear 24, the intermediate sprocket 11 is used to push the conveying chain 6 on the surface of the fork 4 upward, so that the outer top of the driven sprocket 8 and the outer top of the intermediate sprocket 11 are horizontally aligned, resulting in the conveying chain 6 above the fork 4 being relatively horizontal, and the goods can be transported horizontally on the conveying chain 6, ensuring its movement stability.

[0054] from Figure 3 It can be seen that the inner side of the fork 4 is fixedly connected with a limit tooth row 13 meshing with the outer teeth of the intermediate sprocket 11. Correspondingly, the inner side of the fork 4 is movably installed with an adjustment tooth row 15 symmetrical to the limit tooth row 13. Since the adjustment tooth row 15 can move horizontally along the fork 4, when the adjustment tooth row 15 moves away from the limit tooth row 13, the meshing of the intermediate sprocket 11 and the limit tooth row 13 can make the intermediate sprocket 11 rotate. When the adjustment tooth row 15 approaches the limit tooth row 13 and sticks to the intermediate sprocket 11, since the intermediate sprocket 11 is limited by the limit tooth row 13 and the adjustment tooth row 15 on both sides, the movement of the intermediate sprocket 11 is limited, thereby locking the intermediate sprocket 11.

[0055] The back of the adjusting tooth row 15 is fixedly connected with a driven telescopic tube 18, and one end of the driven telescopic tube 18 is fixedly connected to the inner side of the fork 4. Figure 3 and Fig. 9 It can be seen that a driven spring 19 is sleeved on the outside of the driven telescopic tube 18, so that the elastic force of the driven spring 19 pushes the adjusting tooth row 15 toward the limit tooth row 13, and at the same time, the driven telescopic tube 18 is stretched. It should be noted that under normal conditions, the elastic force of the driven spring 19 will make the adjusting tooth row 15 close to the middle sprocket 11, but the adjusting tooth row 15 will not contact and mesh with the middle sprocket 11 due to the elastic force of the driven spring 19. Figure 4It can be seen that the bottom of the support carriage 10 is fixedly connected to the driving telescopic tube 14 located below it, and the bottom of the driving telescopic tube 14 is fixed to the inner side of the fork 4. The inner cavities of the driving telescopic tube 14 and the driven telescopic tube 18 are connected through the air supply pipe 20, so that when the airflow changes in the driving telescopic tube 14, the driven telescopic tube 18 will also change, such as extending or contracting. In actual arrangement, the diameter of the driving telescopic tube 14 is generally 3-6 times the diameter of the driven telescopic tube 18, so as to ensure that when the driving telescopic tube 14 moves, the driven telescopic tube 18 has obvious movement changes. In order to make necessary supplements and pressure relief for the airflow in the driven telescopic tube 18 and the driving telescopic tube 14, a damping hole 180 connected to the outside is opened at one end of the driven telescopic tube 18. Although the damping hole 180 can achieve pressure release and airflow supplement, since the damping hole 180 is a small hole, the pressure relief time will be relatively prolonged.

[0056] The back of the adjusting gear row 15 is fixedly connected with an adjusting plate 16 located below the driven telescopic tube 18, and an adjusting groove 160 is opened in the adjusting plate 16. Fig. 9 It can be clearly seen that the shape of the adjustment groove 160 is a "7" shape. Fig. 9 It can be seen that the horizontal top of the adjustment groove 160 is relatively parallel to the bottom of the adjustment plate 16, the vertical side of the adjustment groove 160 and the bottom of the adjustment plate 16 form an angle of 50°-80°, and the top of the adjustment groove 160 is provided with an anti-return groove 161, and the bottom is provided with an anti-slip groove 162, and both the anti-return groove 161 and the anti-slip groove 162 are arc grooves. Correspondingly, a guide roller 17 extending into the adjustment groove 160 is fixedly connected through the middle of the guide frame 22, so that the guide roller 17 can move up and down through the adjustment groove 160 to push the adjustment gear row 15 to move left and right.

[0057] In specific application, when it is necessary to load goods, the fork 4 on the guide frame 3 is controlled by the control console 2 to move downward until the fork head 7 and the grounding wheel 23 touch the ground, at which time, the fork head 7 can scoop up the goods.

[0058] When the grounding wheel 23 presses the ground and moves upward, it will push the guide frame 22 upward at the same time, so that the outer teeth of the driving gear 25 and the driven gear 24 are meshed, and on the other hand, the guide frame 22 pushes the support head 220 upward, so that the support slide 10 pushes upward and compresses the limit spring 21. After the driving gear 25 and the driven gear 24 are meshed, the upwardly pushed support slide 10 will drive the intermediate sprocket 11 to move above the surface of the fork 4, and push the conveyor chain 6 above the fork 4 to tighten it, and the outer top of the intermediate sprocket 11 and the outer top of the driven sprocket 8 are equal in height, so that the goods can move horizontally on the fork 4.

[0059] Secondly, the control console 2 controls the vehicle body 1 to move toward the cargo, so that the fork head 7 shovels the cargo and transports it to the conveyor chain 6. Fig.10 As shown above, the goods will be transported to the top of the conveyor chain 6. Since the conveyor chain 6 is in a horizontal tensioned state at this time, the goods will be transported toward the vehicle body 1 through the horizontal conveyor chain 6.

[0060] Afterwards, the fork 4 is lifted through the control console 2 to facilitate the handling of the goods on the fork 4. During this process, when the fork 4 moves upward and away from the ground, the support slide 10 is pushed downward by the elastic force of the limit spring 21, and then the support head 220 is used to push the guide frame 22 downward, so that the guide frame 22 drives the driving gear 25 to disengage from the driven gear 24; and, through the downward movement of the support slide 10, on the one hand, the intermediate sprocket 11 is driven away from the conveying chain 6 above the fork 4, because the conveying chain 6 is not After the middle sprocket 11 is tightened, the goods will press the conveyor chain 6 onto the surface of the fork 4. As the support carriage 10 moves downward, the chain head 12 will press onto the conveyor chain 6 below the fork 4. As the conveyor chain 6 below the fork 4 pushes downward, the conveyor chain 6 above the fork 4 that is pressed by the goods is arranged horizontally on the surface of the fork 4. The unpressed part of the goods will be in an inclined state because the driven sprocket 8 is higher than the surface of the fork 4. Fig.10 As shown in the figure below.

[0061] On the other hand, as the support carriage 10 moves downward, the driving telescopic tube 14 will shrink, and the airflow in the driving telescopic tube 14 will flow into the driven telescopic tube 18 through the air delivery pipe 20, thereby Figure 3 As can be seen in the figure, when a large amount of airflow in the driving telescopic tube 14 flows into the driven telescopic tube 18, a small part of the airflow is discharged from the damping hole 180 to prevent the pressure in the driven telescopic tube 18 from being too large. The driven telescopic tube 18 pushes the adjusting gear row 15 to move in the direction of the intermediate sprocket 11. Since the guide roller 17 is located in the adjusting groove 160, when the adjusting plate 16 is pushed to the left, the guide roller 17 is forced to move downward through the influence of the adjusting groove 160. Figure 6It can be seen that the guide roller 17 is connected and fixed to the guide frame 22. When the guide roller 17 accelerates downward, the guide frame 22 is further moved downward. As the fork 4 is lifted upward, the grounding wheel 23 is pushed downward by the elastic force of the limit spring 21. Before the grounding wheel 23 leaves the ground, the falling of the support carriage 10 has pushed the chain head 12 to press on the conveying chain 6 below. When the grounding wheel 23 is completely off the ground, a large amount of airflow in the driving telescopic tube 14 is squeezed into the driven telescopic tube 18, causing the airflow pressure of the driven telescopic tube 18 to increase, thereby increasing the intensity of the adjustment tooth row 15 moving toward the intermediate sprocket 11. At the same time, the adjustment tooth row 15 drives the adjustment plate 16 to move left, increasing the downward intensity of the grounding wheel 23. Finally, under the action of the airflow compression force in the driven telescopic tube 18 and the gravity of the grounding wheel 23 itself, the guide roller 17 enters the anti-slip groove 162, and the adjustment tooth row 15 will contact and engage with the intermediate sprocket 11. At the same time, since the chain head 12 is pushed downward by the supporting slide 10 toward the conveying chain 6, and during the downward process, the intermediate sprocket 11 will engage with the supporting slide 10. Finally, the intermediate sprocket 11 is simultaneously engaged with the limit tooth row 13 and the adjustment tooth row 15, which makes it impossible for the intermediate sprocket 11 to move upward.

[0062] from Fig.10 It can be seen from the middle and lower figures that the conveyor chain 6 near the driven sprocket 8 is tilted upward from the left end of the cargo, and the conveyor chain 6 below the fork 4 is restricted by the chain head 12, so that the conveyor chain 6 cannot move. When the cargo moves toward the fork head 7 due to inertia, the tilted conveyor chain 6 cannot be further stretched. Therefore, the tilted conveyor chain 6 is constructed to further prevent the cargo from moving horizontally in the fork 4. Furthermore, in order to ensure that the conveyor chain 6 can be firmly attached to the fork 4, a locking tooth row can also be set on the surface of the fork 4, refer to Figure 2 or Fig.10 The surface of the fork 4 on the fork and the area below the conveyor chain 6. When the conveyor chain 6 is horizontally tightened, the conveyor chain 6 is located above the locking tooth row and will not affect the movement of the conveyor chain 6; similarly, when the conveyor chain 6 is attached to the fork 4, the movement of the conveyor chain 6 above the fork 4 will be further restricted.

[0063] When the goods on the fork 4 need to be unloaded, the fork 4 is lowered to the ground, so that the grounding wheel 23 contacts the ground, and the driving gear 25 and the driven gear 24 are engaged for transmission. When the grounding wheel 23 rolls on the ground, the conveying chain 6 rotates and the goods on the conveying chain 6 are pushed out.

[0064] In actual application, goods are often piled on the shelves, and the conveyor chain 6 needs to rotate to push the goods out with low resistance. This requires ensuring that the grounding wheel 23 is in continuous contact with the shelf, and the shelf is generally limited in area. It is obviously impossible to ensure that the grounding wheel 23 is always in contact with the driven gear 24 when it is not under pressure, and it is also impossible to ensure that the intermediate sprocket 11 lifts the conveyor chain 6 and the chain head 12 does not restrict the movement of the conveyor chain 6. On the basis of this embodiment, it is only necessary that when the fork 4 goes down and presses on the shelf, the grounding wheel 23 will be pressed on the shelf synchronously, and then the fork 4 is directly lifted up again, so that the driving gear 25 can always be meshed with the driven gear 24. The reason is:

[0065] When the grounding wheel 23 is pressed by the shelf, the guide frame 22 is forced to push the support slide 10 through the support head 220 to compress the limit spring 21, thereby pushing the intermediate sprocket 11 out from the surface of the fork 4 and horizontally lifting the conveying chain 6 on the surface of the fork 4. At the same time, the upward movement of the support slide 10 will cause the pressure in the driving telescopic tube 14 to drop rapidly, thereby causing the driven telescopic tube 18 to contract. The contracted driven telescopic tube 18 pulls the adjusting gear row 15 to move to the right. When the guide frame 22 ascends to the point where the outer teeth of the driving gear 25 and the driven gear 24 are meshed, the guide roller 17 moves to the corner position of the adjusting groove 160. Since the pressure in the driven telescopic tube 18 is too low, it will contract again and squeeze the driven spring 19, and the guide roller 17 will move to the anti-return groove 161. Combined with the actions mentioned above, it can be known that when the grounding wheel 23 is pressed on the shelf and then quickly lifted up, the guide roller 17 will always be pressed against the anti-return groove 161. Combined with the elastic force of the limit spring 21, the support slide 10 is pushed downward, forcing the guide roller 17 to be firmly pressed against the anti-return groove 161. At this time, the conveyor chain 6 is always maintained in a horizontal state, and the chain head 12 is separated from the conveyor chain 6, finally allowing the conveyor chain 6 to move freely.

[0066] Since the current guide frame 3 can not only control the up and down movement of the fork 4 when in use, but also make the guide frame 3 deflect forward. At this time, the guide frame 3 is deflected forward through the control console 2, and the goods slide down the conveyor chain 6 under their own gravity, thereby ensuring that the goods are stably placed on the shelf with limited area.

[0067] Regarding the explanation that the guide roller 17 always remains at the corner of the adjustment groove 160 when the grounding wheel 23 is in contact with the ground for a long time, it can be clearly known from the above content that after the grounding wheel 23 contacts the ground, the guide roller 17 will be directly placed in the anti-return groove 161. If the grounding wheel 23 contacts the ground for a long time, the damping hole 180 can transmit the external airflow to the driven telescopic tube 18 to relieve the airflow pressure in the driven telescopic tube 18. Then, under the elastic force of the driven spring 19, the adjustment gear row 15 will pull the adjustment plate 16 to move to the left, so that the guide roller 17 moves to the corner of the adjustment groove 160. It can be seen from here that when it is necessary to release the restriction, the guide roller 17 can be separated from the anti-return groove 161 by simply pressing the grounding wheel 23 against the ground or the shelf for a long time.

Claims

1. A material handling trolley for warehousing, characterized in that: include: A control console (2) controls the movement of the vehicle body (1) and the lifting / deflection of the fork (4) on the guide rail frame (3); A driving sprocket (9) and a driven sprocket (8), wherein the driving sprocket (9) is movably mounted on the inner side of the fork (4) and close to one end of the guide rail frame (3), and the driven sprocket (8) is movably mounted on the other end of the fork (4), and the driven sprocket (8) and the driving sprocket (9) are connected by a transmission chain (6); A driven gear (24) is coaxially fixedly connected to the driving sprocket (9); A guide frame (22) is movably mounted on one side of the fork (4), and a driving gear (25) meshing with the driven gear (24) is movably mounted on the end thereof, and the driving gear (25) is located directly below the driven gear (24); A grounding wheel (23) is coaxially fixedly connected to the driving gear (25); A support carriage (10) is movably mounted on the inner side of the fork (4) and close to the driving sprocket (9), and is located on the inner side of the conveying chain (6); A chain head (12) is fixed to the middle of the bottom side of the supporting slide (10); A limit spring (21) is arranged between the top of the support carriage (10) and the inner side of the fork (4); A support head (220) is fixed to one end of the guide frame (22) and is located below the support slide (10); An intermediate sprocket (11) is movably mounted in the middle of the support slide (10) and is located above the top end (12) of the chain; A limiting tooth row (13) meshing with the outer teeth of the intermediate sprocket (11) is fixedly connected to the inner side of the fork (4), and an adjusting tooth row (15) symmetrical to the limiting tooth row (13) is movably installed on the inner side of the fork (4); A driven telescopic tube (18) is fixedly connected to the back of the adjusting gear row (15), and one end of the driven telescopic tube (18) is fixedly connected to the inner side of the fork (4), and a driven spring (19) is sleeved on the outer side of the driven telescopic tube (18); A driving telescopic tube (14) is fixedly connected to the bottom of the supporting slide (10), the bottom of the driving telescopic tube (14) is fixed to the fork (4), and the driving telescopic tube (14) and the driven telescopic tube (18) are connected via an air pipe (20); The back of the adjusting tooth row (15) is fixedly connected to an adjusting plate (16) located below the driven telescopic tube (18), and an adjusting groove (160) is provided in the adjusting plate (16). The middle of the guide frame (22) is fixedly connected to a guide roller shaft (17) extending into the adjusting groove (160).

2. The material handling vehicle for storage according to claim 1, characterized in that: A fork head (7) is fixedly connected to the end of the cargo fork (4), and the inclined surface of the fork head (7) is tangent to the outer side of the driven sprocket (8).

3. The material handling vehicle for storage according to claim 1, characterized in that: There are two cargo forks (4), and the ground contacting wheels (23) on the two cargo forks (4) are connected by transmission via a linkage rod (5).

4. The material handling vehicle for storage according to claim 1, characterized in that: The outer side of the driven sprocket (8) is higher than the surface of the fork (4), and the outer side of the driving sprocket (9) is tangent to the surface of the fork (4).

5. The material handling vehicle for storage according to claim 1, characterized in that: The diameter of the driving telescopic tube (14) is 3-6 times the diameter of the driven telescopic tube (18).

6. The material handling vehicle for storage according to claim 1, characterized in that: A damping hole (180) communicating with the outside is formed at one end of the driven telescopic tube (18).

7. The material handling vehicle for storage according to claim 1, characterized in that: The adjustment channel (160) is in the shape of a "7", and an anti-return groove (161) is provided at the top of the adjustment channel (160), and an anti-slip groove (162) is provided at the bottom, and both the anti-return groove (161) and the anti-slip groove (162) are arc-shaped grooves.

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