Pallet truck turnover equipment and pallet truck packaging method

Abstract

The invention discloses pallet truck turnover equipment and a pallet truck packaging method.The equipment comprises a power-assisted manipulator, a turnover clamp is installed on the power-assisted manipulator and comprises a vertical arm, a turnover power assembly, a clamp bottom frame, a movable clamping arm and a fixed clamping arm, the upper end of the vertical arm is fixedly connected with the power-assisted manipulator, and the lower end of the vertical arm is fixedly connected with the turnover power assembly; the turnover power assembly is installed on the lower portion of the vertical arm, the clamp bottom frame is installed on an output shaft of the turnover power assembly, the fixed clamping arm is fixedly arranged on the clamp bottom frame, the movable clamping arm is movably installed on the clamp bottom frame, and a movable clamping arm driving device is further arranged on the clamp bottom frame. According to the turnover device, the turnover clamp can be used for clamping the pallet trucks and completing turnover work, under the cooperation of the assistance mechanical arm, one pallet truck can be placed on a pallet firstly, a material box is placed on the pallet truck, accessories of the pallet trucks are placed in the material box and fixed, and then the other pallet truck is turned over by 180 degrees and then placed on the material box in an inverted mode; in this way, the two pallet trucks can be stacked, the space is fully utilized, and the transportation efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to a pallet truck flipping device and a pallet truck packaging method. Background Art

[0002] In the industrial vehicle industry, pallet trucks are widely used, mainly for short-distance handling, stacking, and loading and unloading of goods, and are suitable for industries that require efficient and flexible handling of palletized goods. Due to their high cost performance, they are often purchased in batches.

[0003] The common shipping method for pallet trucks in the market is to place them individually on pallets and fix them, and then use flatbed trucks or containers for shipping. This shipping method results in waste of space due to the irregular shape of pallet trucks, which are not easy to stack, and high shipping costs. Moreover, it is easy to bump the product surface, and repair is time-consuming and laborious. Summary of the Invention

[0004] The purpose of the present invention is to provide a pallet truck flipping device and a pallet truck packaging method to solve the technical problems in the prior art.

[0005] The present invention provides a pallet truck flipping device, including a power-assisted manipulator, on which a flipping fixture is installed. The flipping fixture includes a vertical arm, a flipping power assembly, a fixture bottom frame, a movable clamping arm, and a fixed clamping arm. The upper end of the vertical arm is fixedly connected to the power-assisted manipulator. The flipping power assembly is installed at the lower part of the vertical arm. The fixture bottom frame is installed on the output shaft of the flipping power assembly. The fixed clamping arm is fixedly arranged on the fixture bottom frame. The movable clamping arm is movably installed on the fixture bottom frame. An actuating device for the movable clamping arm is also provided on the fixture bottom frame.

[0006] In the above-mentioned pallet truck flipping device, preferably, an operating handle is fixedly provided on the vertical arm, and a controller is installed on each of the left armrest and the right armrest of the operating handle.

[0007] In the above-mentioned pallet truck flipping device, preferably, the flipping power assembly is composed of a motor and a speed reducer. The motor is fixedly connected to the speed reducer. The output shaft of the motor is connected to the speed reducer. The speed reducer is fixed on the vertical arm through bolt assemblies. An output shaft mounting hole is formed in the vertical arm in a direction perpendicular to its axis. The output shaft of the speed reducer passes through the output shaft mounting hole and is fixedly connected to the middle part of the fixture bottom frame.

[0008] In the above-mentioned pallet truck flipping device, preferably, at the end where the fixed clamping arm is fixedly arranged on the fixture bottom frame, two parallel slide rails are fixedly provided on the fixture bottom frame. A slider is slidably installed on each of the two slide rails. The movable clamping arm is fixedly connected to the two sliders.

[0009] In the aforesaid pallet truck tipping device, preferably, the movable clamping arm driving device includes a cylinder and a connecting rod. One end of the connecting rod is connected to the cylinder, and the other end of the connecting rod is connected to the movable clamping arm. The cylinder is fixedly arranged on the fixture bottom frame.

[0010] In the aforesaid pallet truck tipping device, preferably, the movable clamping arm and the fixed clamping arm are of symmetrical structures. They both include a clamping arm main body, a mechanical limit block, and a limit rod. Two of the mechanical limit blocks are fixedly arranged at the end of the clamping arm main body. A long strip-shaped installation groove is formed on the clamping arm main body. One end of the limit rod has a threaded column, and the threaded column on the limit rod passes through the long strip-shaped installation groove and is threadedly connected to a limit nut.

[0011] In the aforesaid pallet truck tipping device, preferably, the assisting manipulator includes a fixed support column, a balance cylinder, a cantilever, and a movable support column. The inside of the fixed support column is of a hollow structure. The lower end of the movable support column is rotationally connected to the upper end of the fixed support column through a bearing. The cantilever is installed at the upper end of the movable support column through a rotating shaft. An installation frame is arranged on the movable support column. The lower end of the balance cylinder is connected to the installation frame through a rotating shaft. The telescopic end of the balance cylinder is connected to the cantilever through a rotating shaft. A balance weight is arranged on the cantilever.

[0012] In the aforesaid pallet truck tipping device, preferably, an air storage tank and a pneumatic control box are also fixedly arranged on the movable support column. The air storage tank and the balance cylinder are respectively connected to the pneumatic control box through air pipes.

[0013] A method for packaging a pallet truck uses the aforesaid pallet truck tipping device to package the pallet truck, and specifically includes the following steps:

[0014] Step 1: Clamp the first pallet truck with the tipping fixture, then use the assisting manipulator to place the first pallet truck on the pallet, and then the tipping fixture releases the first pallet truck;

[0015] Step 2: Place a material box on the legs of the first pallet truck, put two sets of pallet truck accessories into the material box, then cover the top cover of the material box and fix the top cover of the material box to the material box;

[0016] Step 3: Clamp the second pallet truck with the tipping fixture, use the assisting manipulator to lift the second pallet truck to a preset height, then use the tipping fixture to turn it 180°, use the assisting manipulator to place the second pallet truck on the material box, fix it with a packing belt, and then the tipping fixture releases the second pallet truck;

[0017] Step 4: Use bubble wrap to wrap and fix the first pallet truck, the second pallet truck, the material box, and the pallet as a whole.

[0018] In the foregoing pallet truck packaging method, preferably, the pallet truck accessories described in step 2 include a pallet truck battery, a pallet truck housing, a charger, and a pallet truck handle.

[0019] Compared with the prior art, the present invention includes a boosting manipulator, on which a flipping fixture is installed. The flipping fixture includes a vertical arm, a flipping power assembly, a fixture bottom frame, a movable clamping arm, and a fixed clamping arm. The upper end of the vertical arm is fixedly connected to the boosting manipulator. The flipping power assembly is installed at the lower part of the vertical arm. The fixture bottom frame is installed on the output shaft of the flipping power assembly. The fixed clamping arm is fixedly arranged on the fixture bottom frame. The movable clamping arm is movably installed on the fixture bottom frame. An actuating device for the movable clamping arm is further provided on the fixture bottom frame. The present invention can clamp the pallet truck through the flipping fixture and complete the flipping work of the pallet truck. With the cooperation of the boosting manipulator, two pallet trucks can be stacked together through a storage bin, effectively solving the problem that pallet trucks cannot be stacked in the prior art, enabling more pallet trucks to be accommodated in a unit volume, and reducing the packaging and shipping costs. The present invention packages the pallet truck through the boosting manipulator and the flipping fixture, eliminates manual handling, reduces the labor intensity, and improves the packaging efficiency. Description of the Drawings

[0020] Figure 1 is a reference diagram of the usage state of the present invention;

[0021] Figure 2 is an axonometric view of the boosting manipulator;

[0022] Figure 3 is an axonometric view of the flipping fixture;

[0023] Figure 4 is an axonometric view of the operating handle;

[0024] Figure 5 is an axonometric view of the movable clamping arm and the fixed clamping arm;

[0025] Figure 6 is an axonometric view of the pallet;

[0026] Figure 7 is a structural state diagram after step 1 is completed;

[0027] Figure 8 is a structural state diagram after step 2 is completed;

[0028] Figure 9 is a structural state diagram after step 3 is completed.

[0029] Description of the reference numerals: assisting manipulator 1, fixed support column 11, air storage tank 12, balance cylinder 13, balance weight 14, pneumatic control box 15, cantilever 16, lower limit disc 17, upper limit disc 18, movable support column 19, flipping fixture 2, vertical arm 21, operating handle 22, controller 221, control button 222, flipping power assembly 23, fixture bottom frame 24, cylinder 25, connecting rod 251, slide rail 26, slider 27, movable clamping arm 28, clamping arm main body 281, mechanical limit block 282, limit rod 283, limit nut 284, long strip-shaped mounting groove 285, adjustment mark 286, fixed clamping arm 29, tray 3, main roller limit plate 31, second support block 32, material box 4, first pallet truck 5, second pallet truck 6. Detailed implementation manners

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention, and cannot be construed as a limitation to the present invention.

[0031] Embodiments of the present invention: As Figures 1-9 shown, a tray truck flipping device includes an assisting manipulator 1, and a flipping fixture 2 is installed on the assisting manipulator 1. The flipping fixture 2 includes a vertical arm 21, a flipping power assembly 23, a fixture bottom frame 24, a movable clamping arm 28 and a fixed clamping arm 29. The upper end of the vertical arm 21 is fixedly connected to the assisting manipulator 1. The flipping power assembly 23 is installed at the lower part of the vertical arm 21. The fixture bottom frame 24 is installed on the output shaft of the flipping power assembly 23. The fixed clamping arm 29 is fixedly arranged on the fixture bottom frame 24. The movable clamping arm 28 is movably installed on the fixture bottom frame 24. An actuating device for the movable clamping arm is further provided on the fixture bottom frame 24.

[0032] The actuating device for the movable clamping arm is used to drive the movable clamping arm 28 to move on the fixture bottom frame 24, so as to change the distance between the movable clamping arm 28 and the fixed clamping arm 29, so as to clamp or release the pallet truck. The flipping power assembly 23 is used to adjust the angle of the fixture bottom frame 24. After the movable clamping arm 28 and the fixed clamping arm 29 clamp the pallet truck, the height of the pallet truck can be lifted by the assisting manipulator 1, and then the flipping power assembly 23 is used to rotate the fixture bottom frame 24 by 180°, so that the pallet truck on the fixture bottom frame 24 is flipped by 180°.

[0033] Specifically, in this embodiment, an operating handle 22 is fixedly provided on the vertical arm 21, and a controller 221 is respectively installed on the left armrest and the right armrest of the operating handle 22. Control buttons 222 are provided on the controller 221, and the number and functions of the control buttons 222 can be set according to requirements. For example, an up button, a down button, a slow up button, a slow down button, a clamping button, a release button, a flipping button, etc. can be set. In a preferred embodiment, two release buttons are provided, that is, a dual-control design is adopted. The two release buttons are respectively arranged on the two controllers 221. Only when the release buttons on the two controllers 221 are pressed simultaneously with both hands, the movable clamping arm driving device will drive the movable clamping arm 28 to move to ensure operation safety.

[0034] Further, the flipping power assembly 23 is composed of a motor and a speed reducer. The motor and the speed reducer are fixedly connected by a bolt assembly. The output shaft of the motor is connected to the speed reducer. The speed reducer is fixedly installed on the vertical arm 21 through a bolt assembly. An output shaft mounting hole is formed in the vertical arm 21 along a direction perpendicular to its axis. The output shaft of the speed reducer passes through the output shaft mounting hole and is fixedly connected to the middle part of the fixture bottom frame 24. The motor is electrically connected to the controller 221, and the motor works when the flipping button is pressed.

[0035] One end of the fixed clamping arm 29 is fixedly provided on the fixture bottom frame 24. Two parallel slide rails 26 are fixedly provided on the fixture bottom frame 24. A slider 27 is slidably installed on each of the two slide rails 26. The movable clamping arm 28 is fixedly connected to the two sliders 27.

[0036] Through the arrangement of the slide rails 26 and the sliders 27, the movable clamping arm 28 moves more smoothly, preventing jamming.

[0037] The movable clamping arm driving device includes a cylinder 25 and a connecting rod 251. The connecting rod 251 is an L-shaped rod. One end of the connecting rod 251 is fixedly connected to the end of the piston rod of the cylinder 25, and the other end of the connecting rod 251 is fixedly connected to the movable clamping arm 28. The cylinder 25 is fixedly installed on the fixture bottom frame 24 through a bolt assembly.

[0038] In this embodiment, an air cut-off protection device is provided on the vertical arm 21. The air cut-off protection device can prevent the piston rod of the cylinder 25 from moving in case of sudden air cut-off. Even if there is a sudden air cut-off, the movable clamping arm 28 will not move and the pallet truck will not fall. The air cut-off protection device is an existing product and can be directly purchased. The air cut-off protection device is not shown in the figure.

[0039] Further, the movable clamping arm 28 and the fixed clamping arm 29 are of symmetrical structure. They both include a clamping arm main body 281, a mechanical limit block 282 and a limit rod 283. Two mechanical limit blocks 282 are fixedly arranged at the end of the clamping arm main body 281. A long strip-shaped installation groove 285 is formed on the clamping arm main body 281. One end of the limit rod 283 has a threaded post. The threaded post on the limit rod 283 passes through the long strip-shaped installation groove 285 and is threadedly connected with a limit nut 284.

[0040] The two mechanical limit blocks 282 at the end of the clamping arm main body 281 are used to clamp the forklift on the pallet truck. The limit rod 283 is used to abut against the outer side of the box body on the pallet truck to prevent the vehicle body from slipping during the overturning process. Since the thicknesses of the box bodies on different models of pallet trucks are different, the limit rod 283 is designed as a structure with adjustable position. After adjusting the position of the limit rod 283, tighten the limit nut 284. In order to achieve quick adjustment, in this embodiment, a plurality of adjustment marks 286 are further arranged on the clamping arm main body 281. According to the adjustment marks, the limit rod 283 can be quickly and accurately moved to the required position.

[0041] Through the arrangement of the mechanical limit blocks 282 and the limit rod 283 on the movable clamping arm 28 and the fixed clamping arm 29, the pallet truck will not fall off during the overturning process after being clamped.

[0042] Further, the assisting manipulator 1 includes a fixed support column 11, a balance cylinder 13, a cantilever 16 and a movable support column 19. The fixed support column 11 has a hollow structure. A bearing is installed inside the upper end of the fixed support column 11. The lower end of the movable support column 19 is rotatably connected to the upper end of the fixed support column 11 through the bearing. The cantilever 16 is installed at the upper end of the movable support column 19 through a rotating shaft. An installation frame is arranged on the movable support column 19. The lower end of the balance cylinder 13 is connected to the installation frame through a rotating shaft. The telescopic end of the balance cylinder 13 is connected to the cantilever 16 through a rotating shaft. A balance weight 14 is arranged on the cantilever 16. It should be noted that the cantilever 16 can adopt an existing conventional structure. The cantilever 16 with the required structure can be purchased according to actual needs. The specific structure of the cantilever 16 in this embodiment will not be described in detail.

[0043] An air storage tank 12 and a pneumatic control box 15 are also fixedly arranged on the movable support column 19. The air storage tank 12 and the balance cylinder 13 are respectively connected to the pneumatic control box 15 through air pipes. The pneumatic control box 15 is electrically connected to the controller 221.

[0044] Since the movable support column 19 can rotate relative to the fixed support column 11, when the power-assisted manipulator 1 is not working, in order to prevent injuries to personnel or damage to items caused by the automatic rotation of the device, in this embodiment, an upper limit disk 18 is preferably fixedly provided on the movable support column 19, a lower limit disk 17 is provided on the fixed support column 11, and a plurality of limit holes are provided on both the upper limit disk 18 and the lower limit disk 17. When the power-assisted manipulator 1 is not working, a limit rod is used to connect the upper limit disk 18 and the lower limit disk 17 to prevent the movable support column 19 from rotating.

[0045] Working principle of the power-assisted manipulator 1: When the corresponding control button is pressed, the controller 221 changes the state of the pneumatic control box 15, and the high-pressure gas in the gas storage tank 12 enters the balance cylinder 13 through the pneumatic control box 15, causing the balance cylinder 13 to extend or contract. When the balance cylinder 13 extends, it pushes the cantilever 16, and one end of the cantilever 16 connected to the flipping fixture 2 descends. When the balance cylinder 13 contracts, it pulls the cantilever 16 to raise the flipping fixture 2.

[0046] A method for packaging a pallet truck, which uses the above-mentioned pallet truck flipping device to package the pallet truck, specifically including the following steps:

[0047] Step 1, use the flipping fixture 2 to clamp the first pallet truck 5, then use the power-assisted manipulator 1 to place the first pallet truck 5 on the pallet 3, and then control the flipping fixture 2 to release the first pallet truck 5;

[0048] The specific operation method of Step 1 is that the staff holds the operation handle 22 by hand, finely adjusts the position of the power-assisted manipulator 1 to align the limit rods 283 on the movable clamping arm 28 and the fixed clamping arm 29 with the positioning holes on the first pallet truck 5, then presses the clamping button, and the controller 221 controls the cylinder 25 to contract. The movable clamping arm 28 approaches the fixed clamping arm 29, clamps the first pallet truck 5, and then releases the clamping button. At this time, the clamping state is maintained.

[0049] Then press the slow rising button, and the controller 221 sends an instruction to the pneumatic control box 15 to make the balance cylinder 13 contract. Then the flipping fixture 2 together with the first pallet truck 5 is lifted. After lifting to a height exceeding the pallet 3, release the slow rising button, and the balance cylinder 13 stops contracting. The staff moves the first pallet truck 5 to the pallet 3 through the operation handle 22. There are two main roller limit plates 31 on the pallet 3. By pressing the slow descending button, the balance cylinder 13 extends, and the first pallet truck 5 slowly lands on the pallet 3, and the main rollers on the first pallet truck 5 are restricted by the two main roller limit plates 31 on the pallet 3. The current state is shown in Figure 7 。

[0050] Then press the release buttons on the two controllers 221 simultaneously with both hands, the cylinder 25 extends, and the movable clamping arm 28 moves away from the fixed clamping arm 29 to release the first pallet truck 5.

[0051] Step 2: Place a bin 4 on the legs of the first pallet truck 5, put two sets of pallet truck accessories into the bin 4, then cover the bin top cover and fix the bin top cover to the bin 4. For the current state, please refer to Figure 8 ; The pallet truck accessories include a pallet truck battery, a pallet truck housing, a charger, and a pallet truck handle. There is a partition in the bin 4, and different accessories are placed in different areas so that they will not collide with each other. The pallet truck accessories are all wrapped with bubble film to achieve shock absorption and anti-collision effects.

[0052] Step 3: Use the flipping fixture 2 to clamp the second pallet truck 6. Use the assisting manipulator 1 to lift the second pallet truck 6 to a preset height and then use the flipping fixture 2 to flip it 180°. Use the assisting manipulator 1 to place the second pallet truck 6 on the bin 4. After fixing it with a packing strap, release the second pallet truck 6 by the flipping fixture 2;

[0053] The specific operation method of Step 3 is to manually adjust the position of the flipping fixture 2 so that the limit rods 283 on the movable clamping arm 28 and the fixed clamping arm 29 are aligned with the box body on the second pallet truck 6. Then press the clamping button, and the controller 221 controls the cylinder 25 to contract. The movable clamping arm 28 moves closer to the fixed clamping arm 29 to clamp the second pallet truck 6, and then release the clamping button. At this time, the clamping state is maintained.

[0054] Press the rising button, and the controller 221 sends an instruction to the pneumatic control box 15 to quickly contract the balance cylinder 13 so that the second pallet truck 6 is quickly lifted to the preset height. After reaching the preset height, release the rising button. Then press the flipping button, and the controller 221 controls the flipping power assembly 23 to work, so that the second pallet truck 6 flips 180°. Then release the flipping button, and the flipping power assembly 23 stops rotating. The staff holds the operation handle 22 and moves the second pallet truck 6 to directly above the bin 4. Then press the slow descending button to make the second pallet truck 6 slowly fall onto the bin 4. The fork of the second pallet truck 6 fits with the bin top cover, and a second support block 32 is provided on the pallet 3. The box body part of the second pallet truck 6 abuts against the second support block 32. For the current state, please refer to Figure 9 .

[0055] After using the packing strap to fix the second pallet truck 6 to the bin 4, the first pallet truck 5, and the pallet 3, press the release buttons on the two controllers 221 with both hands at the same time. The cylinder 25 extends, and the movable clamping arm 28 moves away from the fixed clamping arm 29 to release the second pallet truck 6.

[0056] Step 4: Use bubble film to wrap and fix the first pallet truck 5, the second pallet truck 6, the bin 4, and the pallet as a whole. After wrapping with bubble film, it can effectively prevent the surface of the pallet truck from being knocked and solve the problem of repair required after knocking in the prior art.

[0057] The structure, features, and effects of the present invention have been described in detail based on the embodiments shown in the drawings. The above is only the preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or equivalent embodiments modified to equivalent changes, that still do not exceed the spirit covered by the specification and the drawings shall be within the protection scope of the present invention.

Claims

1. A pallet truck tipping device, comprising an assisting manipulator (1), characterized in that: A turning fixture (2) is installed on the power-assisted manipulator (1). The turning fixture (2) includes a vertical arm (21), a turning power assembly (23), a fixture bottom frame (24), a movable clamping arm (28), and a fixed clamping arm (29). The upper end of the vertical arm (21) is fixedly connected to the power-assisted manipulator (1). The turning power assembly (23) is installed at the lower part of the vertical arm (21). The fixture bottom frame (24) is installed on the output shaft of the turning power assembly (23). The fixed clamping arm (29) is fixedly arranged on the fixture bottom frame (24). The movable clamping arm (28) is movably installed on the fixture bottom frame (24). An actuating device for the movable clamping arm is further provided on the fixture bottom frame (24).

2. The pallet truck tipping device according to claim 1, characterized in that: An operating handle (22) is fixedly arranged on the vertical arm (21). A controller (221) is installed on each of the left and right handrails of the operating handle (22).

3. The pallet truck tipping device according to claim 1, characterized in that: The turning power assembly (23) consists of a motor and a speed reducer. The motor is fixedly connected to the speed reducer. The output shaft of the motor is connected to the speed reducer. The speed reducer is fixed on the vertical arm (21) through a bolt assembly. An output shaft mounting hole is formed in the vertical arm (21) in a direction perpendicular to its axis. The output shaft of the speed reducer passes through the output shaft mounting hole and is fixedly connected to the middle part of the fixture bottom frame (24).

4. The pallet truck tipping device according to claim 1 or 3, characterized in that: One end of the fixed clamping arm (29) is fixedly arranged on the fixture bottom frame (24). Two parallel slide rails (26) are fixedly arranged on the fixture bottom frame (24). A slider (27) is slidably installed on each of the two slide rails (26). The movable clamping arm (28) is fixedly connected to the two sliders (27).

5. The pallet truck tipping device according to claim 4, characterized in that: The actuating device for the movable clamping arm includes a cylinder (25) and a connecting rod (251). One end of the connecting rod (251) is connected to the cylinder (25). The other end of the connecting rod (251) is connected to the movable clamping arm (28). The cylinder (25) is fixedly arranged on the fixture bottom frame (24).

6. The pallet truck tipping device according to claim 5, characterized in that: The movable clamping arm (28) and the fixed clamping arm (29) are of a symmetrical structure. They both include a clamping arm main body (281), a mechanical limit block (282), and a limit rod (283). Two of the mechanical limit blocks (282) are fixedly arranged at the end of the clamping arm main body (281). A long strip-shaped mounting groove (285) is formed in the clamping arm main body (281). One end of the limit rod (283) has a threaded post. The threaded post on the limit rod (283) passes through the long strip-shaped mounting groove (285) and is threadedly connected to a limit nut (284).

7. The pallet truck tipping device according to claim 6, characterized in that: The assisting manipulator (1) includes a fixed support column (11), a balance cylinder (13), a cantilever (16) and a movable support column (19). The fixed support column (11) has a hollow structure inside. The lower end of the movable support column (19) is rotatably connected to the upper end of the fixed support column (11) through a bearing. The cantilever (16) is installed at the upper end of the movable support column (19) through a rotating shaft. An installation bracket is provided on the movable support column (19). The lower end of the balance cylinder (13) is connected to the installation bracket through a rotating shaft. The telescopic end of the balance cylinder (13) is connected to the cantilever (16) through a rotating shaft. A balance weight (14) is arranged on the cantilever (16).

8. The pallet truck tipping device according to claim 7, characterized in that: A gas storage tank (12) and a pneumatic control box (15) are also fixedly arranged on the movable support column (19). The gas storage tank (12) and the balance cylinder (13) are respectively connected to the pneumatic control box (15) through air pipes.

9. A method for packaging a pallet truck, characterized in that: This method uses the pallet truck flipping device according to any one of claims 1-8 to package the pallet truck, specifically including the following steps: Step 1, use the flipping fixture (2) to clamp the first pallet truck (5), then use the assisting manipulator (1) to place the first pallet truck (5) on the pallet (3), and then the flipping fixture (2) releases the first pallet truck (5); Step 2, place a bin (4) on the legs of the first pallet truck (5), put two sets of pallet truck accessories into the bin (4), then cover the bin top cover and fix the bin top cover to the bin (4); Step 3, use the flipping fixture (2) to clamp the second pallet truck (6), use the assisting manipulator (1) to lift the second pallet truck (6) to a preset height and then use the flipping fixture (2) to flip it 180°, use the assisting manipulator (1) to place the second pallet truck (6) on the bin (4), fix it with a packing belt and then the flipping fixture (2) releases the second pallet truck (6); Step 4, use bubble wrap to wrap and fix the first pallet truck (5), the second pallet truck (6), the bin (4) and the pallet as a whole.

10. The pallet truck packaging method according to claim 9, characterized in that: The pallet truck accessories described in Step 2 include a pallet truck battery, a pallet truck housing, a charger and a pallet truck handle.

Images