Unmanned forklift for storage

Abstract

The unmanned forklift for storage comprises a forklift body, and a pallet fork mechanism is arranged on the top of the forklift body in a front-back moving mode. On one hand, the two symmetrical first sliding grooves and the screw rods are arranged at the top of the vehicle body and matched with the belt pulley mechanism in the protection box, so that the outer portal frame stably and accurately moves front and back, the pallet fork mechanism is driven to efficiently fork and place cargoes, the moving stability and accuracy are improved, and the cargoes are prevented from falling or colliding; the warehousing operation safety and efficiency are improved; on the other hand, in the rotating mechanism, a first motor drives a gear to be meshed with a fluted disc to drive a rotating column and a top plate to rotate to achieve goods rotation, meanwhile, an annular limiting groove in the top of a support is matched with a ball in a moving rod groove in the bottom of the top plate, friction force is reduced, limiting guiding is achieved, the goods can flexibly change the direction, and the storage space utilization rate is increased; and rotation is smoother and more stable, the cargo damage probability is reduced, and guarantee is provided for efficient operation of warehouse logistics.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, and in particular to an unmanned forklift for warehousing. Background Technology

[0002] In the field of modern warehousing and logistics, forklifts are the core equipment for cargo handling, and their level of automation and intelligence directly affects the efficiency and safety of warehousing operations.

[0003] Traditional warehouse forklifts mostly rely on manual operation, resulting in low efficiency, high labor intensity, high labor costs, and the risk of cargo damage or safety accidents due to human error. With increasing demands for warehouse space utilization and the challenges of complex warehouse environments, traditional forklifts struggle to achieve precise cargo positioning and flexible steering, and their fork mechanisms lack mobility, failing to meet diverse cargo handling needs. Furthermore, some existing driverless forklifts suffer from high friction and insufficient stability in their rotating mechanism designs, affecting the smoothness and accuracy of cargo orientation adjustments and limiting the automation of warehousing and logistics.

[0004] Therefore, there is an urgent need to develop an unmanned forklift for warehouses with efficient movement and flexible rotation capabilities to solve the above problems.

[0005] Therefore, we propose an unmanned forklift for warehousing. Utility Model Content

[0006] The main objective of this invention is to provide an unmanned forklift for warehousing, which aims to prevent problems such as low operational efficiency, high labor intensity, high labor costs, and damage to goods or safety accidents caused by human error; to prevent difficulties in accurately positioning and flexibly turning goods in complex warehousing environments, and the inability to meet diverse goods handling needs due to poor forklift movement flexibility; and to prevent problems such as high friction and insufficient stability of the rotating mechanism of the unmanned forklift affecting the smoothness and accuracy of goods orientation adjustment. This invention improves the efficiency and safety of warehousing operations, increases the utilization rate of warehousing space, meets the diverse goods handling needs in complex warehousing environments, and promotes the automation of warehousing and logistics. It effectively solves the problems in the background technology.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] An unmanned forklift for warehousing includes a vehicle body. A fork mechanism is movable back and forth on the top of the vehicle body. The fork mechanism includes an outer mast, an inner mast, a fork carriage, forks, and hydraulic rods. Two symmetrical first slide grooves are longitudinally provided on the top of the vehicle body. A lead screw is rotatably connected inside each of the two first slide grooves. The bottom of the outer mast is threadedly connected to the two lead screws. A protective box is installed at the rear of the vehicle body. A pulley mechanism for driving and connecting the two lead screws is provided inside the protective box.

[0009] The top of the vehicle body is provided with a rotating mechanism, which includes a bracket, through which a vertically arranged rotating column passes, and the rotating column is rotatably connected to the bracket and the top of the vehicle body. A top plate is fixedly connected to the top of the rotating column, and an auxiliary rolling assembly is provided between the top plate and the bracket. A gear is fixedly connected to the outside of the rotating column, and a first motor is fixedly installed on the top of the vehicle body. A gear is fixedly connected to the output shaft of the first motor, and the gear meshes with the gear.

[0010] The top of the bracket is provided with an annular limiting groove, and the auxiliary rolling assembly includes a plurality of movable rods arranged in an annular array at the bottom of the top plate. The bottom of the movable rod is provided with a groove, and a ball bearing that slides in the groove is provided to cooperate with the annular limiting groove.

[0011] By adopting the above technical solution, two first sliding grooves are longitudinally provided on the top of the vehicle body. A lead screw is rotatably connected in each groove. The bottom of the outer mast is threadedly connected to the lead screw. The pulley mechanism in the protective box connects the two lead screws together. When the lead screw is driven to rotate, the two lead screws rotate synchronously due to the action of the pulley mechanism, so that the outer mast can move back and forth along the lead screw on the top of the vehicle body, thereby driving the fork mechanism to move back and forth as a whole, so as to realize operations such as picking up and placing goods. Since the fork mechanism includes the outer mast, inner mast, fork carriage, forks and hydraulic rods, the movement of the outer mast can realize the corresponding action of the fork mechanism.

[0012] The first motor is fixedly mounted on the top of the vehicle body. Its output shaft is connected to a gear. A rotating column passes through a bracket and is rotatably connected to both the bracket and the top of the vehicle body. A top plate is fixedly connected to the top of the rotating column, and a geared disc is fixedly connected to its exterior. When the first motor operates, the output shaft drives the gear to rotate. The gear meshes with the geared disc, thereby driving the geared disc to rotate. The geared disc drives the rotating column to rotate, which in turn drives the top plate to rotate, thus enabling the forklift to rotate the goods on the top plate. This allows the forklift to change the orientation of goods within the storage space to adapt to different storage and handling needs.

[0013] The top of the support is equipped with an annular limiting groove, and the bottom of the top plate has a ring array of multiple moving rods. Each moving rod has a ball bearing in a groove at its bottom. The ball bearing slides in the annular limiting groove. When the top plate rotates under the drive of the rotating column, the ball bearing at the bottom of the moving rod rolls in the annular limiting groove. This design can reduce the friction when the top plate rotates, making the rotation smoother. At the same time, the annular limiting groove also plays a certain role in limiting and guiding the rotation of the top plate, ensuring the stability of the top plate rotation.

[0014] Furthermore, the inner gantry is located inside the outer gantry, and the inner walls of both sides of the outer gantry are provided with a second sliding groove vertically, and the two sides of the inner gantry are slidably connected to the second sliding groove.

[0015] By adopting the above technical solution, the outer mast is fixed to the vehicle body, providing a vertical sliding track for the inner mast. The second sliding grooves on the inner walls of both sides of the outer mast are key guiding structures. The two sides of the inner mast slide in contact with these two second sliding grooves. When the forklift lifts or lowers the goods, the hydraulic rod generates an upward or downward force, which is transmitted to the inner mast. Because the two sides of the inner mast are tightly fitted with the second sliding grooves, the inner mast can only slide along the vertical direction defined by the second sliding grooves. The second sliding grooves play a role in constraint and guidance, ensuring that the inner mast does not shift laterally during lifting and lowering, thus guaranteeing the stability of the lifting action. On the other hand, it also reduces the friction between the inner mast and the outer mast, allowing the inner mast to move up and down smoothly inside the outer mast, thereby driving the fork carriage and forks mounted on the inner mast to achieve the lifting and lowering function of the goods.

[0016] Furthermore, the hydraulic rod is vertically fixedly installed on the outer gantry, and the top end of the hydraulic rod is connected to the inner gantry.

[0017] By adopting the above technical solution, when it is necessary to lift the goods, the hydraulic system supplies oil to the hydraulic rod, and the hydraulic oil pushes the piston rod of the hydraulic rod to extend upward. Since the top of the hydraulic rod is connected to the inner mast, the inner mast will move upward as the piston rod extends. At the same time, the two sides of the inner mast slide and engage with the second slide groove on the inner wall of the outer mast, which allows the inner mast to rise smoothly along the second slide groove. The fork carriage and forks are installed on the inner mast, so they will also rise with the inner mast, thereby lifting the goods to the required height.

[0018] When it is necessary to lower the goods, the hydraulic system controls the hydraulic rod to return oil. Under the action of gravity and the weight of the goods, the piston rod retracts downward. The inner mast slides down along the second slide groove as the piston rod retracts, and the fork carriage and forks also descend, placing the goods in the designated position.

[0019] Furthermore, the fork carriage is fixedly connected to the front of the inner mast, and the forks are fixedly connected to the front of the fork carriage.

[0020] By adopting the above technical solution, when the forklift moves to the cargo storage position, the forks, in coordination with the movement of the vehicle body and the forward and backward movement of the fork mechanism via screw transmission, accurately insert into the pallet or other load-bearing structure below the cargo. Since the forks are fixedly connected to the fork carriage, and the fork carriage is fixedly connected to the inner mast, the entire structure can remain stable during insertion, ensuring that the forks accurately pick up the cargo. When it is necessary to lift the cargo, the hydraulic rod is activated, and its top end is connected to the inner mast. The piston rod of the hydraulic rod extends upward, driving the inner mast to slide upward along the second slide groove on the inner wall of the outer mast. Because the fork carriage is fixed on the inner mast, and the forks are fixed on the fork carriage, the rise of the inner mast will sequentially drive the fork carriage and forks to rise, thereby lifting the cargo to the required height. Similarly, when it is necessary to lower the cargo, the piston rod of the hydraulic rod retracts, the inner mast descends, and the fork carriage and forks descend accordingly, placing the cargo in the designated position.

[0021] Furthermore, the pulley mechanism includes two pulleys fixedly connected at one end to two lead screws, and the two pulleys are connected by belt drive. A second motor is fixedly installed inside the protective box, and the output shaft of the second motor is coaxially connected to one end of one of the lead screws.

[0022] By adopting the above technical solution, the second motor inside the protective box is the power source for the entire transmission process. When the forklift needs to move the fork mechanism back and forth on the top of the vehicle, the control system will start the second motor, and the output shaft of the second motor will begin to rotate. Since its output shaft is coaxially connected to one end of one of the lead screws, the lead screw will rotate synchronously with the rotation of the second motor's output shaft. Pulleys are fixedly connected to one end of each of the two lead screws, and these two pulleys are connected by a belt. The belt is a synchronous belt, and the surface of the pulleys has teeth that engage with the synchronous belt, thus ensuring that the two lead screws rotate synchronously without slippage. When connected to the second motor... When the lead screw rotates, the pulley on the lead screw also rotates. Since the belt connects the two pulleys, the rotating pulley will drive the other pulley to rotate synchronously through the belt, which in turn causes the other lead screw to start rotating. The bottom of the outer mast is connected to both lead screws by threaded transmission. When the two lead screws rotate synchronously under the drive of the pulley mechanism, the outer mast will move linearly along the axis of the lead screw under the action of the threaded transmission. Since the fork mechanism is connected to the outer mast, the fork mechanism will move back and forth on the top of the vehicle body along with the outer mast, thereby adjusting the front and rear position of the forks to adapt to different cargo picking and placing needs.

[0023] Furthermore, wheels are provided at the four corners of the bottom of the vehicle body.

[0024] By adopting the above technical solution, the four wheels are evenly distributed at the bottom of the vehicle body, providing a stable support foundation for the forklift and ensuring that the forklift can maintain balance in both stationary and moving states. When the forklift needs to move, the wheels are driven to rotate by a drive device connected to the wheels, and the wheels generate rolling friction with the ground, thereby enabling the forklift to move forward, backward, and turn on the warehouse floor to reach the designated storage or handling position of goods, thus meeting the movement needs of goods handling in warehousing operations.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) This utility model discloses an unmanned forklift for warehousing. By setting two symmetrical first slides on the top of the vehicle body and installing lead screws in the slides, and cooperating with the pulley mechanism in the protective box, the outer mast can move back and forth. When the drive lead screws rotate, the pulley mechanism makes the two lead screws rotate synchronously. The outer mast can move back and forth on the top of the vehicle body stably and accurately along the lead screws, driving the overall movement of the fork mechanism, thereby realizing the efficient picking and placing of goods. Compared with the traditional forklift fork movement method, this design improves the stability and accuracy of movement, effectively avoids the risk of goods falling or colliding due to fork movement deviation, and significantly improves the safety and efficiency of warehousing operations.

[0027] (2) This utility model discloses an unmanned forklift for warehousing. In the rotating mechanism, the first motor drives the gear to rotate, which in turn drives the rotating column and the top plate to rotate through meshing with the gear plate, thereby realizing the rotation of the goods. At the same time, the annular limiting groove at the top of the support cooperates with the ball bearing in the groove of the moving rod at the bottom of the top plate. While reducing the friction of the top plate rotation, it also limits and guides the rotation of the top plate. This design allows the goods to flexibly change direction in the storage space to adapt to different storage and handling needs, greatly improving the utilization rate of the storage space. Moreover, compared with the traditional forklift goods turning operation, the rotation process of this invention is smoother and more stable, reducing the probability of damage to the goods due to unstable turning, and providing a strong guarantee for the efficient operation of warehousing and logistics. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of an unmanned forklift for warehousing according to the present invention.

[0029] Figure 2 This is a schematic diagram of the rotating mechanism of an unmanned forklift for warehousing according to the present invention.

[0030] Figure 3 This is a schematic diagram of the pulley mechanism of an unmanned forklift for warehousing according to the present invention.

[0031] In the diagram: 1. Vehicle body; 2. Fork mechanism; 3. Outer mast; 4. Inner mast; 5. Fork carriage; 6. Fork; 7. First slide rail; 8. Lead screw; 9. Protective box; 10. Pulley mechanism; 11. Rotating mechanism; 12. Bracket; 13. Rotating column; 14. Top plate; 15. Gear plate; 16. First motor; 17. Gear; 18. Moving rod; 19. Annular limiting groove; 20. Groove; 21. Ball bearing; 22. Pulley; 23. Belt; 24. Second motor; 25. Wheel; 26. Second slide rail; 27. Hydraulic rod. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] To prevent problems such as low operational efficiency, high labor intensity, high labor costs, and damage to goods or safety accidents due to human error; to prevent difficulties in achieving precise positioning and flexible steering of goods in complex warehousing environments, and the inability to meet diverse goods handling needs due to poor forklift mobility; and to prevent problems such as high friction and insufficient stability of the rotating mechanism of unmanned forklifts affecting the smoothness and accuracy of goods orientation adjustment, thereby improving the efficiency and safety of warehousing operations, increasing the utilization rate of warehousing space, meeting the diverse goods handling needs in complex warehousing environments, and promoting the automation of warehousing and logistics, such as... Figure 1 , Figure 2 , Figure 3 As shown, an unmanned forklift for warehousing includes a vehicle body 1. A fork mechanism 2 is movable back and forth on the top of the vehicle body 1. The fork mechanism 2 includes an outer mast 3, an inner mast 4, a fork carriage 5, forks 6, and hydraulic rods 27. The top of the vehicle body 1 has two symmetrical first slide grooves 7 longitudinally arranged. A lead screw 8 is rotatably connected inside each of the two first slide grooves 7. The bottom of the outer mast 3 is threadedly connected to the two lead screws 8. A protective box 9 is installed at the rear end of the vehicle body 1. The protective box 9 has a pulley mechanism 10 for driving the connection between the two lead screws 8.

[0034] The top of the vehicle body 1 is provided with a rotating mechanism 11, which includes a bracket 12. A vertically arranged rotating column 13 passes through the bracket 12 and is rotatably connected to the bracket 12 and the top of the vehicle body 1. A top plate 14 is fixedly connected to the top of the rotating column 13. An auxiliary rolling assembly is provided between the top plate 14 and the bracket 12. A gear disk 15 is fixedly connected to the outside of the rotating column 13. A first motor 16 is fixedly installed on the top of the vehicle body 1. A gear 17 is fixedly connected to the output shaft of the first motor 16 and meshes with the gear disk 15.

[0035] The top of the bracket 12 is provided with an annular limiting groove 19. The auxiliary rolling assembly includes a plurality of moving rods 18 arranged in an annular array at the bottom of the top plate 14. The bottom of the moving rod 18 is provided with a groove 20, and a ball bearing 21 that slides in cooperation with the annular limiting groove 19 is provided in the groove 20.

[0036] In use, the top of the vehicle body 1 has two first sliding grooves 7 longitudinally arranged, and each sliding groove 7 is rotatably connected to a lead screw 8. The bottom of the outer mast 3 is threadedly connected to the lead screw 8. The pulley mechanism 10 in the protective box 9 drives the two lead screws 8 together. When the lead screw 8 is driven to rotate, due to the action of the pulley mechanism 10, the two lead screws 8 rotate synchronously, so that the outer mast 3 can move back and forth along the lead screw 8 on the top of the vehicle body 1, thereby driving the fork mechanism 2 to move back and forth as a whole, so as to realize the operation of picking up and placing goods. Since the fork mechanism 2 includes the outer mast 3, the inner mast 4, the fork carriage 5, the forks 6 and the hydraulic rod 27, the movement of the outer mast 3 can realize the corresponding action of the fork mechanism 2.

[0037] The first motor 16 is fixedly mounted on the top of the vehicle body 1. Its output shaft is connected to a gear 17. A rotating column 13 passes through a bracket 12 and is rotatably connected to both the bracket 12 and the top of the vehicle body 1. A top plate 14 is fixedly connected to the top of the rotating column 13, and a gear disc 15 is fixedly connected to its exterior. When the first motor 16 operates, its output shaft drives the gear 17 to rotate. The gear 17 meshes with the gear disc 15, thereby driving the gear disc 15 to rotate. The gear disc 15 drives the rotating column 13 to rotate, which in turn drives the top plate 14 to rotate. This enables the forklift to rotate the goods on the top plate 14, facilitating the change of the direction of the goods within the storage space to adapt to different storage and handling needs.

[0038] The top of the bracket 12 is provided with an annular limiting groove 19, and the bottom of the top plate 14 has a ring array of multiple moving rods 18. Each moving rod 18 has a ball bearing 21 in the groove 20 at its bottom. The ball bearing 21 slides in the annular limiting groove 19. When the top plate 14 rotates under the drive of the rotating column 13, the ball bearing 21 at the bottom of the moving rod 18 rolls in the annular limiting groove 19. This design can reduce the friction when the top plate 14 rotates, making the rotation smoother. At the same time, the annular limiting groove 19 also plays a certain role in limiting and guiding the rotation of the top plate 14, ensuring the stability of the rotation of the top plate 14.

[0039] For example, such as Figure 1 As shown, the present invention also includes an inner gantry 4 disposed on the inner side of the outer gantry 3, and a second sliding groove 26 vertically provided on the inner walls of both sides of the outer gantry 3, wherein the two sides of the inner gantry 4 are slidably connected to the second sliding groove 26.

[0040] In use, the outer mast 3 is fixed to the vehicle body 1, providing a vertical sliding track for the inner mast 4. The second sliding grooves 26 on the inner walls of both sides of the outer mast 3 are key guiding structures. The two sides of the inner mast 4 are precisely in sliding engagement with these two second sliding grooves 26. When the forklift performs lifting and lowering operations, the hydraulic rod 27 generates an upward or downward force, which is transmitted to the inner mast 4. Because the two sides of the inner mast 4 are tightly engaged with the second sliding grooves 26, the inner mast 4 can only slide along the vertical direction defined by the second sliding grooves 26. The second sliding grooves 26 play a role in constraint and guidance. On the one hand, they ensure that the inner mast 4 does not shift laterally during lifting and lowering, thus ensuring the stability of the lifting and lowering action. On the other hand, they also reduce the friction between the inner mast 4 and the outer mast 3, allowing the inner mast 4 to move up and down more smoothly inside the outer mast 3, thereby driving the fork carriage 5 and forks 6 installed on the inner mast 4 to achieve the lifting and lowering function of the goods.

[0041] For example, such as Figure 1 As shown, the present invention also includes a hydraulic rod 27 that is vertically fixedly installed on the outer gantry 3, and the top end of the hydraulic rod 27 is connected to the inner gantry 4.

[0042] In use, when it is necessary to lift the goods, the hydraulic system supplies oil to the hydraulic rod 27. The hydraulic oil pushes the piston rod of the hydraulic rod 27 to extend upward. Since the top of the hydraulic rod 27 is connected to the inner mast 4, the inner mast 4 will move upward as the piston rod extends. At the same time, the two sides of the inner mast 4 slide in cooperation with the second slide groove 26 on the inner wall of the outer mast 3. This allows the inner mast 4 to rise smoothly along the second slide groove 26. The fork carriage 5 and forks 6 are installed on the inner mast 4, so they will also rise along with the inner mast 4, thereby lifting the goods to the required height.

[0043] When it is necessary to lower the goods, the hydraulic system controls the hydraulic rod 27 to return oil. Under the action of gravity and the weight of the goods, the piston rod retracts downward. The inner mast 4 slides downward along the second slide groove 26 as the piston rod retracts. The fork carriage 5 and forks 6 also descend accordingly, placing the goods in the designated position.

[0044] For example, such as Figure 1 As shown, the present invention also includes the fork carriage 5 being fixedly connected to the front of the inner mast 4, and the forks 6 being fixedly connected to the front of the fork carriage 5.

[0045] In use, when the forklift moves to the cargo storage location, the forks 6, driven by the movement of the vehicle body 1 and the fork mechanism 2 (moving back and forth via the lead screw 8), accurately insert into the pallet or other load-bearing structure below the cargo. Since the forks 6 are fixedly connected to the fork carriage 5, and the fork carriage 5 is fixedly connected to the inner mast 4, the entire structure remains stable during insertion, ensuring the forks 6 accurately pick up the cargo. When the cargo needs to be lifted, the hydraulic rod 27 is activated, its top end connected to the inner mast 4. The piston rod of the hydraulic rod 27 extends upward, causing the inner mast 4 to slide upward along the second groove 26 on the inner wall of the outer mast 3. Because the fork carriage 5 is fixed to the inner mast 4, and the forks 6 are fixed to the fork carriage 5, the rise of the inner mast 4 sequentially raises the fork carriage 5 and the forks 6, thereby lifting the cargo to the required height. Similarly, when the cargo needs to be lowered, the piston rod of the hydraulic rod 27 retracts, the inner mast 4 descends, and the fork carriage 5 and the forks 6 descend accordingly, placing the cargo in the designated position.

[0046] For example, such as Figure 3 As shown, the present invention also includes the following: the pulley mechanism 10 includes two pulleys 22 fixedly connected at one end of two lead screws 8, and the two pulleys 22 are connected by a belt 23 for transmission. A second motor 24 is fixedly installed inside the protective box 9, and the output shaft of the second motor 24 is coaxially connected to one end of one of the lead screws 8.

[0047] In use, the second motor 24 inside the protective box 9 is the power source for the entire transmission process. When the forklift needs to move the fork mechanism 2 back and forth on the top of the vehicle body 1, the control system will start the second motor 24, and the output shaft of the second motor 24 will start to rotate. Since its output shaft is coaxially connected to one end of one of the lead screws 8, the lead screw 8 will rotate synchronously with the rotation of the output shaft of the second motor 24. Pulleys 22 are fixedly connected to one end of each of the two lead screws 8, and the two pulleys 22 are connected by a belt 23. The belt 23 is a synchronous belt, and the surface of the pulley 22 has teeth that cooperate with the synchronous belt, thereby ensuring that the two lead screws 8 rotate synchronously without slippage. When the lead screw 8 connected to the second motor 24... When rotating, the pulley 22 on the lead screw 8 will also rotate. Since the belt 23 connects the two pulleys 22, the rotating pulley 22 will drive the other pulley 22 to rotate synchronously through the belt 23, which will cause the other lead screw 8 to start rotating as well. The bottom of the outer mast 3 is connected to the two lead screws 8 by threaded transmission. When the two lead screws 8 rotate synchronously under the drive of the pulley mechanism 10, the outer mast 3 will move linearly along the axis of the lead screw 8 under the action of the threaded transmission of the lead screw 8. Since the fork mechanism 2 is connected to the outer mast 3, the fork mechanism 2 will move back and forth on the top of the vehicle body 1 along with the outer mast 3, thereby adjusting the front and rear position of the forks 6 to adapt to different cargo picking and placing needs.

[0048] For example, such as Figure 1 As shown, the present invention also includes wheels 25 at the four corners of the bottom of the vehicle body 1.

[0049] When in use, the four wheels 25 are evenly distributed at the bottom of the vehicle body 1, providing a stable support base for the forklift and ensuring that the forklift can maintain balance in both stationary and moving states. When the forklift needs to move, the wheels 25 are driven to rotate by a drive device connected to the wheels 25. The wheels 25 generate rolling friction with the ground, which enables the forklift to move forward, backward, and turn on the warehouse floor to reach the designated storage or handling position of goods, thus meeting the movement needs of goods handling in warehousing operations.

[0050] It should be noted that this utility model is an unmanned forklift for warehousing. Using the wheels 25 at the four corners of the bottom of the vehicle body 1, the forklift moves on the warehouse floor through rolling friction under the drive of the drive device, and smoothly arrives at the storage position of the goods. The wheels 25 ensure the balance of the forklift when it is moving and stationary.

[0051] The second motor 24 inside the protective box 9 is started, and its output shaft drives the lead screw 8 connected to it to rotate. Through the transmission of the pulley 22 and belt 23 in the pulley mechanism 10, the other lead screw 8 rotates synchronously. The bottom of the outer mast 3 is threadedly driven by the lead screw 8. The rotation of the lead screw 8 drives the outer mast 3 to move back and forth in the first slide groove 7 on the top of the vehicle body 1, and precisely adjusts the front and rear position of the fork mechanism 2.

[0052] After the fork mechanism 2 is positioned, with the movement of the vehicle body 1 and the forward and backward movement of the fork mechanism 2, the fork 6 is precisely inserted into the pallet below the goods. The fork 6, fork carriage 5 and inner mast 4 are fixedly connected to ensure structural stability during the insertion process and achieve stable forklifting of goods.

[0053] The hydraulic system supplies oil to the hydraulic rod 27, which is vertically fixed on the outer mast 3. The hydraulic oil pushes the piston rod to extend, causing the inner mast 4, which is connected to the top, to rise smoothly along the second slide groove 26 on the inner wall of the outer mast 3. The inner mast 4 drives the fork carriage 5 and forks 6 to lift the goods to the target height. When it is necessary to lower the goods, the hydraulic system controls the hydraulic rod 27 to return oil. The piston rod retracts under the action of gravity and the weight of the goods. The inner mast 4, fork carriage 5 and forks 6 descend to place the goods in the designated position.

[0054] If the cargo direction needs to be changed, the first motor 16 on the top of the vehicle body 1 is started. The gear 17 on its output shaft rotates and meshes with the gear plate 15 to drive the rotating column 13 and the top plate 14 to rotate around the axis. The ball 21 in the groove 20 of the bottom moving rod 18 of the top plate 14 rolls in the annular limiting groove 19 on the top of the bracket 12, which helps the top plate 14 to rotate smoothly and realize the cargo direction adjustment.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A driverless forklift for warehousing, comprising a vehicle body (1), characterized in that, The top of the vehicle body (1) has a fork mechanism (2) that moves back and forth. The fork mechanism (2) includes an outer mast (3), an inner mast (4), a fork carriage (5), forks (6), and a hydraulic rod (27). The top of the vehicle body (1) has two symmetrical first slide grooves (7) arranged longitudinally. Both first slide grooves (7) are rotatably connected to lead screws (8). The bottom of the outer mast (3) is threadedly connected to the two lead screws (8). The rear end of the vehicle body (1) is equipped with a protective box (9). The protective box (9) is equipped with a pulley mechanism (10) for driving the connection between the two lead screws (8). The top of the vehicle body (1) is provided with a rotating mechanism (11), the rotating mechanism (11) includes a bracket (12), a vertically arranged rotating column (13) passes through the bracket (12), and the rotating column (13) is rotatably connected to the bracket (12) and the top of the vehicle body (1). A top plate (14) is fixedly connected to the top of the rotating column (13), and an auxiliary rolling assembly is provided between the top plate (14) and the bracket (12). A gear plate (15) is fixedly connected to the outside of the rotating column (13). A first motor (16) is fixedly installed on the top of the vehicle body (1), and a gear (17) is fixedly connected to the output shaft of the first motor (16). The gear (17) meshes with the gear plate (15). The top of the bracket (12) is provided with an annular limiting groove (19). The auxiliary rolling assembly includes a plurality of moving rods (18) arranged in annular array at the bottom of the top plate (14). The bottom of the moving rods (18) is provided with a groove (20). A ball (21) that slides in the groove (20) is provided in the groove (20) and slides in the annular limiting groove (19).

2. The unmanned forklift for warehousing as described in claim 1, characterized in that: The inner gantry (4) is located inside the outer gantry (3). The inner walls of both sides of the outer gantry (3) are provided with a second sliding groove (26) in a vertical direction. The two sides of the inner gantry (4) are slidably connected to the second sliding groove (26).

3. The unmanned forklift for warehousing as described in claim 1, characterized in that: The hydraulic rod (27) is vertically fixed on the outer gantry (3), and the top end of the hydraulic rod (27) is connected to the inner gantry (4).

4. The unmanned forklift for warehousing as described in claim 1, characterized in that: The fork carriage (5) is fixedly connected to the front of the inner mast (4), and the forks (6) are fixedly connected to the front of the fork carriage (5).

5. The unmanned forklift for warehousing as described in claim 1, characterized in that: The pulley mechanism (10) includes two pulleys (22) fixedly connected to one end of two lead screws (8). The two pulleys (22) are connected by a belt (23). A second motor (24) is fixedly installed inside the protective box (9). The output shaft of the second motor (24) is coaxially connected to one end of one of the lead screws (8).

6. The unmanned forklift for warehousing as described in claim 1, characterized in that: The vehicle body (1) is equipped with wheels (25) at the four corners of its bottom.

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