A lifting device and method for logistics transportation

Abstract

This invention discloses a lifting device and method for logistics transportation, belonging to the technical field of cargo lifting devices. The lifting device includes a frame and a slide mounted on the frame. The slide is used to mount a cargo platform. An upper pressure plate is slidably mounted on the cargo platform, and a lower pressure plate is disposed below the cargo platform. The lower pressure plate moves synchronously with the upper pressure plate. The cargo platform can be pulled out from between stacked goods by the force of gears acting on a rack. Throughout the process, the lower pressure plate automatically senses the position of the stacked goods, allowing the cargo platform to be pulled out from between the stacked goods after contact with the lower pressure plate. Therefore, there is no need to position the upper pressure plate and the cargo platform, nor is there any need for additional control of the upper pressure plate and the cargo platform, making the entire drive system simple and efficient.

Description

Technical Field

[0001] This invention relates to the field of cargo lifting devices, and in particular to a lifting device and method for logistics transportation. Background Technology

[0002] Palletizing is used to quickly and efficiently complete logistics processing operations such as sorting and storage of goods. Palletizing technology has been widely used in the modern logistics field, which can greatly improve the efficiency and accuracy of logistics operations.

[0003] Chinese invention patent CN115611150A discloses a cargo transportation loading and lifting device. When the cargo is delivered to the designated location, an electric push rod is activated. The output end of the electric push rod extends and drives the push plate to push the cargo directly off the lifting platform. The device is easy to operate and has high unloading efficiency.

[0004] The aforementioned device places goods on a lifting platform and uses a pusher plate to stack the goods. However, in actual use, it is difficult to control the height of the lifting platform. When the lifting platform is lower than the already stacked goods, the goods on the lifting platform are difficult to push out. When the lifting platform is higher than the already stacked goods, the goods may tip over during the process of moving them off the lifting platform. In summary, the aforementioned device still has room for improvement.

[0005] Therefore, it is necessary to provide a lifting device and method for logistics transportation to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a lifting device and method for logistics transportation, in order to solve the problem mentioned in the background art that the existing device places goods on a lifting platform and pushes the goods to stack them using a pusher plate, but in actual use, it is difficult to control the height at which the lifting platform is lifted.

[0007] Based on the above ideas, the present invention provides the following technical solution: a lifting device for logistics transportation, including a frame and a slide seat slidably mounted on the frame, the slide seat being used to install a loading platform, an upper pressure plate being slidably mounted on the loading platform, a lower pressure plate being provided below the loading platform, and the lower pressure plate moving synchronously with the upper pressure plate.

[0008] The loading platform and the slide are engaged in friction transmission. When the lower pressure plate moves horizontally along the loading platform and presses against the side of the goods, the loading platform can move relative to the upper and lower pressure plates, so that the loading platform can be pulled out from between the stacked goods.

[0009] As a further aspect of the present invention: a rack is fixed on the loading platform, a motor is slidably mounted on the top of the loading platform, the output shaft of the motor is driven by a gear meshing with the rack, a rotating shaft is connected in the axial direction of the gear, and a connecting block is rotatably provided at both ends of the rotating shaft, and the connecting block is connected to the upper pressure plate, so that the connecting block and the upper pressure plate can move synchronously.

[0010] As a further aspect of the present invention: the top and bottom of the loading platform are respectively provided with a top plate and a bottom plate, the bottom plate is fixedly connected to the slide to support the loading platform, and the loading platform can slide relative to the top plate and the bottom plate.

[0011] As a further aspect of the present invention: a U-shaped sliding sleeve is fixedly connected to the side of the upper pressure plate near the frame. The sliding sleeve is located on both sides of the upper pressure plate and is fitted onto the side of the loading platform. When the loading platform is pulled out from between the stacked goods, the end of the loading platform away from the frame can be placed inside the sliding sleeve.

[0012] As a further embodiment of the present invention: a connecting plate is fixedly provided at the bottom of the upper pressure plate, and the lower pressure plate is hinged to the connecting plate and elastically engaged.

[0013] As a further embodiment of the present invention: a pin sleeve is fixedly provided on the connecting plate, and a pin shaft is fixedly connected to the side of the lower pressure plate near the frame by a support rod. The inner circumferential surface of the pin sleeve is stepped. The pin shaft passes through the pin sleeve and rotates with the pin sleeve. A torsion unit is sleeved on the outside of the pin shaft. The two ends of the torsion unit are respectively connected to the inner wall of the pin sleeve and the pin shaft. In the initial state, the lower pressure plate is in an inclined state.

[0014] As a further aspect of the present invention: a stop block is fixedly provided on the inner wall of the pin sleeve, and a limit block is fixedly provided on the outer circumferential surface of the pin shaft. When the pressure plate contacts the stacked goods and is squeezed into a vertically downward state, the limit block can contact the stop block.

[0015] As a further aspect of the present invention, the top plate is fixedly connected to or elastically connected to the slide.

[0016] As a further embodiment of the present invention: a base is fixedly installed below the motor, a sliding groove is provided on the top surface of the loading platform, and a slider that slides in cooperation with the sliding groove is fixedly installed at the bottom of the base.

[0017] A method for lifting using the aforementioned lifting device for logistics transportation includes the following steps: placing goods on a loading platform; lifting the loading platform above the already stacked goods via a slide; keeping the upper and lower pressure plates stationary and driving the loading platform to move, so that the goods to be stacked are moved from the top of the loading platform and fall onto the top of the already stacked goods.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation of rack and pinion, the motor drives the gear to rotate, which in turn causes the upper pressure plate to push out the goods and stack them. After the goods are stacked, the force of the gear on the rack can pull the loading platform out from between the stacked goods. Throughout the process, the lower pressure plate can automatically sense the position of the stacked goods, so that after the lower pressure plate contacts the goods, the loading platform can be pulled out from between the stacked goods. Therefore, there is no need to position the upper pressure plate and the loading platform, nor is there any need to control the upper pressure plate and the loading platform, making the entire drive system simpler and more efficient. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the upper and lower pressure plates of the present invention;

[0023] Figure 4 This is a schematic diagram of the rack structure of the present invention;

[0024] Figure 5 This is the present invention. Figure 3 A magnified structural diagram at point A;

[0025] Figure 6 This is the present invention. Figure 4 A magnified structural diagram at point B;

[0026] Figure 7 This is a schematic diagram showing the assembly of the top plate, bottom plate, and loading platform of the present invention;

[0027] Figure 8 This is the present invention. Figure 7 A magnified structural diagram at point C;

[0028] Figure 9 This is a schematic diagram of the lower pressure plate of the present invention being attached to one side of the goods and in a vertical position;

[0029] Figure 10 This is a schematic diagram of the loading platform of the present invention being pulled out from the middle of the stacked goods.

[0030] In the diagram: 1. Frame; 2. Sling; 3. Slide; 301. First roller; 302. Second roller; 4. Loading platform; 401. Upper pressure plate; 4011. Clamping strip; 402. Lower pressure plate; 403. Slide groove; 5. Sliding sleeve; 6. Front fork; 7. Rack; 8. Top plate; 9. Bottom plate; 10. Pin sleeve; 11. Base; 12. Longitudinal detection unit; 13. Lateral detection unit; 14. Gear; 15. Connecting block; 16. Torsion unit; 17. Pin shaft; 18. Stop block; 19. Limiting block; 20. Electromagnet; 21. Positioning pin; 22. Positioning hole; 23. Connecting plate. Detailed Implementation

[0031] Example 1: As Figures 1-10 As shown, a lifting device for logistics transportation includes a frame 1 and a slide 3 mounted on the frame 1 and capable of moving up and down along the frame 1. The slide 3 is used to mount a loading platform 4, and an upper pressure plate 401 is slidably mounted on the loading platform 4. In actual use, the goods to be stacked are placed on the loading platform 4 and on the side of the upper pressure plate 401 away from the slide 3. The slide 3 is driven to move upward. When the loading platform 4 is aligned with the top of the already stacked goods, the upper pressure plate 401 is driven to move outward, so that the upper pressure plate 401 pushes the goods on the loading platform 4 and falls on top of the already stacked goods.

[0032] While the above structure can stack goods, it has strict requirements on the vertical position of the loading platform 4. For example, if the loading platform 4 is higher than the already stacked goods, the goods on the loading platform 4 may tip over during the process of being pushed out. If the loading platform 4 is lower than the already stacked goods, the goods on the loading platform 4 are difficult to push out. Based on this, another method for stacking goods is given.

[0033] Example 2: A lower pressure plate 402 is provided below the loading platform 4, and the lower pressure plate 402 and the upper pressure plate 401 can move synchronously;

[0034] In actual use, the lifting assembly raises the loading platform 4 above the already stacked goods. See details below. Figure 9 As shown, when the loading platform 4 is lifted onto the already stacked goods ( Figure 9 After reaching the top of the stacked goods (b) shown in the diagram, the lifting assembly lowers the loading platform 4 so that its bottom contacts the top of the stacked goods. At this point, the lifting assembly stops operating and the upper pressure plate 401 and lower pressure plate 402 move synchronously. The movement stops when the lower pressure plate 402 contacts the side of the stacked goods. In this case, the loading platform 4 is driven to move towards the frame 1, so that the loading platform 4 moves from the goods to be stacked (b) Figure 9 As shown in a), the goods that have already been stacked ( Figure 9The material is pulled out between b) as shown, which facilitates the stacking of goods. Compared with embodiment 1, this solution has lower requirements for the position of the loading platform 4 during the stacking process, which is beneficial to the operation of the staff.

[0035] In Embodiment 2, the upper pressure plate 401 and the lower pressure plate 402 cooperate to stack goods, and the vertical position requirements of the loading platform 4 are relatively low. However, during the process of pulling out the loading platform 4, the friction between the loading platform 4 and the goods may cause the goods to deviate, resulting in the goods being stacked unevenly. Based on this, the structure in Embodiment 2 is further improved.

[0036] Example 3: During the removal of the loading platform 4, the upper pressure plate 401 and the lower pressure plate 402 can be kept stationary, thereby blocking the stacked goods and preventing the goods from moving with the removed loading platform 4. Specifically, a first drive mechanism cooperating with the upper pressure plate 401 and a second drive mechanism cooperating with the loading platform 4 can be set. After the first drive mechanism pushes the goods into place through the upper pressure plate 401, it keeps the upper pressure plate 401 stationary. Then, the second drive mechanism drives the loading platform 4 to move, so that the loading platform 4 can be removed from between the already stacked goods and the goods to be stacked.

[0037] The arrangement of multiple drive mechanisms makes the overall equipment quite complex and cumbersome to operate. Therefore, this solution improves the structure of the drive platen 401 and the moving platform 4, specifically in conjunction with... Figures 2-6 As shown, a mounting groove is provided on the top of the loading platform 4, and a rack 7 is fixedly embedded in the mounting groove. A motor is slidably mounted on the top of the loading platform 4, and the output shaft of the motor is driven by a gear 14 that meshes with the rack 7. (Refer to...) Figure 4 As shown, a base 11 is fixedly installed below the motor, and a slide groove 403 is provided on the top surface of the loading platform 4. Specifically, a slider that slides in cooperation with the slide groove 403 is fixedly installed at the bottom of the base 11, so that the motor can slide on the top of the loading platform 4.

[0038] A rotating shaft is arranged along the axial direction of the gear 14, the rotating shaft passes through the gear 14 and is fixedly connected to it, in combination Figure 4 , Figure 6 As shown, at both ends of the rotating shaft, there are connecting blocks 15 rotatably mounted on bearings. The connecting blocks 15 are fitted to the top of the loading platform 4 and located on the side of the upper pressure plate 401 near the frame 1. The end of the rotating shaft that passes through the connecting block 15 is connected to the motor output shaft by a belt or chain drive.

[0039] The loading platform 4 is provided with a top plate 8 and a bottom plate 9 at its top and bottom, respectively. Specifically, the bottom plate 9 is fixedly connected to the slide 3 to support the loading platform 4, while the top plate 8 can be fixedly connected to or elastically connected to the slide 3, so that the loading platform 4 is located between the top plate 8 and the bottom plate 9 and engages with both in frictional transmission. Since the upper pressure plate 401 and the lower pressure plate 402 can move synchronously relative to the loading platform 4, when the motor drives the gear 14 to rotate forward and mesh with the rack 7, the gear 14 can be driven by the rack 7 to move away from the frame 1, so as to push the upper pressure plate 401. The loading platform 4 remains stable through the friction between the bottom plate 9 and the top plate 8. When the lower pressure plate 402 is in contact with the stacked goods ( Figure 9 When contact is made as shown in b), the lower pressure plate 402 is stopped from moving. In this case, when the motor-driven gear 14 continues to rotate forward, since the upper pressure plate 401 and the lower pressure plate 402 are blocked by the goods and cannot move, the gear 14 can drive the rack 7 and the loading platform 4 to move away from the goods and eventually from the goods to be stacked. Figure 10 As shown in a) and the already stacked goods ( Figure 10 Move the goods out between points b) as shown in the diagram to complete the stacking of goods. See reference [link / reference] for details. Figure 10 As shown.

[0040] Combination Figures 4-6 As shown, a retaining strip 4011 is fixedly installed on the side of the upper pressure plate 401 near the frame 1. The retaining strip 4011 can be fixedly connected to the connecting block 15 by bolts. After the goods are stacked, the frame 1 is taken away from the goods and the motor is controlled to rotate in the opposite direction. Specifically, during the reverse rotation of the gear 14 and its meshing with the rack 7, the upper pressure plate 401 and the lower pressure plate 402 can be driven to gradually approach the slide block 3 through the cooperation of the retaining strip 4011 and the slot. When the base 11 contacts the top plate 8 on the top of the loading platform 4, its movement is restricted. At this time, the force of the gear 14 on the rack 7 can cause the end of the loading platform 4 near the upper pressure plate 401 to move away from the slide block 3, which is conducive to the loading platform 4 loading goods again.

[0041] In summary, this device, through the cooperation of rack 7 and gear 14, enables the upper pressure plate 401 to push out and stack goods as the motor drives gear 14 to rotate. After the goods are stacked, the force exerted by gear 14 on rack 7 can pull the loading platform 4 out from between the stacked goods. Throughout the process, the lower pressure plate 402 can automatically sense the position of the stacked goods, so that after the lower pressure plate 402 contacts the goods, the loading platform 4 can be pulled out from between the stacked goods. Therefore, there is no need to position the upper pressure plate 401 and the loading platform 4, nor is there any need for additional control of the upper pressure plate 401 and the loading platform 4, making the entire drive system relatively simple and efficient.

[0042] Combination Figures 1-2 As shown, the lifting assembly is a winch installed at the bottom of the frame 1 and fixedly connected to the frame 1. The hoisting cable 2 on the winch passes over the pulley group installed at the top of the frame 1 and extends downward to the slide 3 and is fixedly connected to the slide 3. The slide 3 is equipped with a first roller 301 and a second roller 302 on its side. Specifically, the first roller 301 is arranged parallel to the width direction of the frame 1 and is located on both sides of the frame 1, so as to limit the slide 3 in the front-back direction. The second roller 302 is arranged perpendicular to the width direction of the frame 1 and fits against the inner side of the frame 1, so as to limit the slide 3 in the left-right direction. This structure allows the slide 3 to slide stably relative to the frame 1 in the vertical direction.

[0043] In actual use, if rack 1 needs to be moved separately, please refer to... Figure 1 As shown, a front fork 6 is fixedly installed at the bottom of the frame 1. Rollers are installed at the end of the front fork 6 away from the frame 1 and at the two sides of the frame 1 near the bottom, which facilitates the movement of the frame 1. Of course, the frame 1 can also be fixed to the vehicle for movement without the front fork 6.

[0044] The upper pressure plate 401 is fixedly connected to a U-shaped sliding sleeve 5 on the side near the frame 1. The sliding sleeve 5 is located on both sides of the upper pressure plate 401 and is sleeved on the side of the loading platform 4. Through this mechanism, when the rack 7 and the loading platform 4 are pulled out from between the stacked goods by the gear 14, the end of the loading platform 4 away from the frame 1 can be in the sliding sleeve 5, thereby preventing the upper pressure plate 401 from separating from the loading platform 4.

[0045] A connecting plate 23 is fixedly installed at the bottom of the upper pressure plate 401. The side of the connecting plate 23 away from the frame 1 is aligned with the side of the upper pressure plate 401 away from the frame 1. The loading platform 4 is provided with a clearance groove that slides with the connecting plate 23. In actual use, the height of the lower pressure plate 402 is at least enough to cover one item, and the lower pressure plate 402 can be hinged to the connecting plate 23. Specifically, refer to... Figures 1-5 As shown, a pin sleeve 10 is fixedly installed on the connecting plate 23, and a pin shaft 17 is fixedly connected to the side of the lower pressure plate 402 near the frame 1 via a support rod. The inner circumferential surface of the pin sleeve 10 is stepped, and the pin shaft 17 passes through the pin sleeve 10 and rotates with it. A torsion unit 16 (such as a torsion spring or coil spring) is sleeved on the outside of the pin shaft 17. The two ends of the torsion unit 16 are respectively connected to the inner wall of the pin sleeve 10 and the pin shaft 17, so that in the initial state, the lower pressure plate 402 is in the position as shown in the figure. Figure 3As shown in the tilted state, this structure allows the lower pressure plate 402 to be squeezed and deflected upwards when the loading platform 4 is lowered to near the ground for loading, thereby avoiding interference between the lower pressure plate 402 and the ground. Of course, the top of the lower pressure plate 402 and the positions on both sides are provided with notches, thereby avoiding interference between the lower pressure plate 402 and the pin sleeve 10 during the upward deflection process.

[0046] Furthermore, a stop block 18 is fixedly provided on the inner wall of the pin sleeve 10 at the lowest point, while a limit block 19 is fixedly provided on the outer circumferential surface of the pin shaft 17. In actual use, when the lower pressure plate 402 contacts the stacked goods and is squeezed into a vertically downward state, the limit block 19 can contact the stop block 18, thereby preventing the lower pressure plate 402 from continuing to deflect, so that the lower pressure plate 402 and the side of the upper pressure plate 401 closest to the goods are aligned.

[0047] Reference Figure 7 As shown, in actual use, a longitudinal detection unit 12 can be embedded in the bottom of the loading platform 4. The longitudinal detection unit 12 is electrically or signal-connected to the winch via a controller (such as a PLC or a microcontroller). When the loading platform 4 moves down to the top of the stacked goods so that the longitudinal detection unit 12 comes into contact with the goods, the longitudinal detection unit 12 can control the winch to stop working, thereby maintaining the stability of the loading platform 4. Compared with the staff observing the position of the loading platform 4, this method is more accurate and convenient.

[0048] Reference Figures 7-8As shown, to more stably push the upper pressure plate 401, a box can be fixedly installed at the top plate 8, and an electromagnet 20 is installed inside the box. A T-shaped positioning pin 21 (made of iron) is set below the electromagnet 20 inside the box. The positioning pin 21 passes through the top plate 8 and slides with it. A tension spring connects the end face of the positioning pin 21 to the top plate 8. The top surface of the loading platform 4 has a positioning hole 22 that mates with the positioning pin 21. The side of the lower pressure plate 402 away from the frame 1 is embedded with a transverse detection unit 13. The transverse detection unit 13 is electrically or signal-connected to the electromagnet 20 through a controller (such as a PLC or a microcontroller). Initially, the bottom end of the positioning pin 21 is inserted into the positioning hole. Within 22, the stability of the loading platform 4 is maintained, allowing the upper pressure plate 401 to push the goods more stably. When the lower pressure plate 402 contacts the side of the goods and is squeezed into a vertically downward state, the lateral detection unit 13 contacts the goods and controls the electromagnet 20 to be energized, thereby attracting the positioning pin 21, causing the bottom end of the positioning pin 21 to move out of the positioning hole 22, so that the loading platform 4 can slide relative to the bottom plate 9 and the top plate 8. Subsequently, when the base 11 contacts the top plate 8 and the gear 14 rotates in the opposite direction to drive the loading platform 4 to move so that the positioning hole 22 coincides with the positioning pin 21, the loading platform 4 can be locked again. The aforementioned lateral detection unit 13 and longitudinal detection unit 12 can both be infrared sensors or pressure sensors, etc.

[0049] The above-disclosed examples are merely preferred embodiments of this application, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of this application. Therefore, equivalent variations made within the scope of this application are still within the scope of this application.

Claims

1. A lifting device for logistics transportation, comprising a frame and a slide block slidably mounted on the frame, the slide block being used to mount a loading platform, and an upper pressure plate slidably mounted on the loading platform, characterized in that: A lower pressure plate is provided below the loading platform, and the lower pressure plate moves synchronously with the upper pressure plate; The loading platform and the slide are engaged in friction transmission. When the lower pressure plate moves horizontally along the loading platform and presses against the side of the goods, the loading platform can move relative to the upper and lower pressure plates, so that the loading platform can be pulled out from between the stacked goods. A rack is fixed on the loading platform, and a motor is slidably mounted on the top of the loading platform. The output shaft of the motor is connected to a gear that meshes with the rack. A rotating shaft is connected along the axis of the gear. Connecting blocks are rotatably installed at both ends of the rotating shaft, and the connecting blocks are connected to the upper pressure plate, so that the connecting blocks and the upper pressure plate can move synchronously. A box is fixedly installed on the top plate, and an electromagnet is installed inside the box. A T-shaped positioning pin is set below the electromagnet inside the box. The positioning pin is made of iron, passes through the top plate and slides with the top plate. A tension spring is connected between the end face of the positioning pin and the top plate. The top surface of the loading platform has a positioning hole that mates with the positioning pin. A lateral detection unit is embedded on the side of the lower pressure plate away from the frame. The lateral detection unit is connected to the electromagnet through a controller.

2. The lifting device for logistics transportation according to claim 1, characterized in that: The loading platform is provided with a top plate and a bottom plate at its top and bottom, respectively. The bottom plate is fixedly connected to the slide to support the loading platform, and the loading platform can slide relative to the top plate and the bottom plate.

3. The lifting device for logistics transportation according to claim 1, characterized in that: The upper pressure plate is fixedly connected to a U-shaped sliding sleeve on the side near the frame. The sliding sleeve is located on both sides of the upper pressure plate and is fitted onto the side of the loading platform. When the loading platform is pulled out from between the stacked goods, the end of the loading platform away from the frame can be placed inside the sliding sleeve.

4. The lifting device for logistics transportation according to claim 1, characterized in that: A connecting plate is fixedly installed at the bottom of the upper pressure plate, and the lower pressure plate is hinged to the connecting plate and elastically engaged.

5. A lifting device for logistics transportation according to claim 4, characterized in that: A pin sleeve is fixedly installed on the connecting plate. A pin shaft is fixedly connected to the side of the lower pressure plate near the frame by a support rod. The inner circumferential surface of the pin sleeve is stepped. The pin shaft passes through the pin sleeve and rotates with the pin sleeve. A torsion unit is sleeved on the outside of the pin shaft. The two ends of the torsion unit are connected to the inner wall of the pin sleeve and the pin shaft, respectively. In the initial state, the lower pressure plate is in an inclined state.

6. A lifting device for logistics transportation according to claim 5, characterized in that: A stop block is fixedly provided on the inner wall of the pin sleeve, and a limit block is fixedly provided on the outer circumference of the pin shaft. When the pressure plate contacts the stacked goods and is squeezed into a vertically downward state, the limit block can contact the stop block.

7. A lifting device for logistics transportation according to claim 2, characterized in that: The top plate is fixedly connected to the slide or is elastically connected to it.

8. A lifting device for logistics transportation according to claim 1, characterized in that: A base is fixedly installed below the motor, a sliding groove is provided on the top surface of the loading platform, and a slider that slides in cooperation with the sliding groove is fixedly installed at the bottom of the base.

9. A method for lifting using a lifting device for logistics transportation as described in any one of claims 1-8, characterized in that, The process includes the following steps: placing the goods on the loading platform; lifting the loading platform above the already stacked goods using a slide; keeping the upper and lower pressure plates stationary and driving the loading platform to move, so that the goods to be stacked are moved from the top of the loading platform and fall on top of the already stacked goods.

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