Wheel lifting mechanism applied to cruciform pallet truck

Abstract

A wheel lifting mechanism applied to a cruciform pallet truck, comprising: pallet truck assemblies (01), and lifting assemblies (02) arranged on one side of the pallet truck assemblies (01). Each pallet truck assembly (01) comprises a welded fork frame (11); a load wheel (12) is arranged in one side of the welded fork frame (11); a pull rod (13) is arranged on one side of the load wheel (12); and a swing arm (14) is mounted at the end of the pull rod (13) away from the load wheel (12). Each lifting assembly (02) comprises a mount (21); a cylinder (22) is mounted below one side of the mount (21); a linear guide rail (23) is arranged on one side of the cylinder (22); and a cam (24) is connected below the linear guide rail (23). When the cruciform pallet truck inserts forks into a cruciform pallet, the load wheels (12) are lifted up and stored in the welded fork frames (11), and as the truck continues to move forward, the welded fork frames (11) pass through the cruciform pallet, so that the load wheels (12) would not roll on the cruciform pallet, thereby avoiding irreversible damage to the cruciform pallet, and achieving smooth overall operations.

Description

A lifting wheel mechanism used in a grid pallet truck Technical Field

[0001] This invention relates to the field of pallet loading technology for grid pallet trucks, specifically a wheel-lifting mechanism used in grid pallet trucks. Background Technology

[0002] Pallets are used to store, load, and move goods. They are an essential piece of logistics equipment in modern warehousing. Pallets are generally divided into three types: crisscross pallets, nine-legged pallets, and grid pallets. Crêpe pallets are usually used in conjunction with crisscross pallet trucks.

[0003] However, the current method of pallet truck loading on the market mainly involves the load-bearing wheels directly running over the pallet. Over time, this method will cause irreversible damage to the pallet, and replacing the damaged pallet directly increases the cost. Summary of the Invention

[0004] The purpose of this invention is to provide a wheel-lifting mechanism for a zigzag pallet truck, so as to solve the problem mentioned in the background art that directly running over the pallet truck will cause damage to the pallet truck.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wheel-lifting mechanism for a grid pallet truck, comprising:

[0006] A pallet truck assembly, wherein a lifting component is provided on one side of the pallet truck assembly;

[0007] A pallet truck assembly includes a fork arm welding frame, a load-bearing wheel is provided inside one side of the fork arm welding frame, a tie rod is provided on one side of the load-bearing wheel, and a swing arm is installed at the end of the tie rod away from the load-bearing wheel;

[0008] A lifting assembly includes a mounting bracket, a hydraulic cylinder is mounted on one side of the mounting bracket, a linear guide rail is provided on one side of the hydraulic cylinder, and a cam is connected to the lower part of the linear guide rail.

[0009] Preferably, the load-bearing wheel and the fork arm welding frame are connected by a pin to form a rotating pair.

[0010] Preferably, the tie rod and the bearing wheel are connected by a pin to form a rotating pair.

[0011] Preferably, the swing arm and the tie rod are connected by a pin to form a rotating pair, and the mounting bracket is fixed to the vehicle body plate by bolts.

[0012] Preferably, the hydraulic cylinder is bolted to the mounting bracket, and the linear guide rail is bolted to the mounting bracket.

[0013] Preferably, the cam is bolted to the slider of the linear guide, and the output end of the hydraulic cylinder is fixedly connected to the slider of the linear guide.

[0014] Preferably, the cam has a groove corresponding to the rocker arm.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] When this new type of pallet truck is loaded, the truck body moves closer to the pallet truck assembly, causing the cam to contact the swing arm. This activates the hydraulic cylinder, which drives the slider of the linear guide rail to move closer to the pallet truck assembly. The slider of the linear guide rail then drives the cam to move closer to the pallet truck assembly. The cam's movement towards the swing arm causes the swing arm to rotate. Simultaneously, the swing arm rotates, causing the pull rod to move towards the lifting assembly. The movement of the pull rod causes the load-bearing wheel to rotate, thus lifting the load-bearing wheel. The load-bearing wheel retracts into the fork arm welding frame, and the truck body continues to move forward, allowing the fork arm welding frame to pass through the pallet truck. The load-bearing wheel will not crush the pallet truck, avoiding irreversible damage to it. The overall operation is smooth. Attached Figure Description

[0017] Figure 1 is a front view of the overall structure of the present invention;

[0018] Figure 2 is a schematic diagram of part A in Figure 1 of the present invention;

[0019] Figure 3 is a schematic diagram of the lifting component of the present invention;

[0020] Figure 4 is a schematic diagram of the bearing wheel before it is lifted according to the present invention;

[0021] Figure 5 is a schematic diagram of the state after the bearing wheel of the present invention is lifted.

[0022] In the diagram: 01, Pallet truck assembly; 11, Fork arm welding frame; 12, Load-bearing wheel; 13, Tie rod; 14, Swing arm; 02, Lifting assembly; 21, Mounting bracket; 22, Hydraulic cylinder; 23, Linear guide rail; 24, Cam. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please refer to Figures 1-5. One embodiment of the present invention is a lifting wheel mechanism for a grid pallet truck. The hydraulic cylinder 22 and linear guide rail 23 used in this application are products that can be directly purchased on the market. Their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be described in detail here.

[0025] Includes: pallet truck assembly 01, with a lifting assembly 02 provided on one side of the pallet truck assembly 01;

[0026] Pallet truck assembly 01 includes a fork arm welding frame 11. A load-bearing wheel 12 is provided inside one side of the fork arm welding frame 11. A pull rod 13 is provided on one side of the load-bearing wheel 12. Moving the pull rod 13 toward the lifting assembly 02 can drive the load-bearing wheel 12 to be lifted and retracted into the fork arm welding frame 11. A swing arm 14 is installed at the end of the pull rod 13 away from the load-bearing wheel 12. Rotating the swing arm 14 counterclockwise can drive the pull rod 13 to move toward the lifting assembly 02.

[0027] The lifting assembly 02 includes a mounting bracket 21. A hydraulic cylinder 22 is mounted on the lower side of one side of the mounting bracket 21. When the hydraulic cylinder 22 is activated, it can drive the slider of the linear guide rail 23 to move. The slider of the linear guide rail 23 can drive the cam 24 to move. The linear guide rail 23 is provided on one side of the hydraulic cylinder 22. The slider of the linear guide rail 23 can drive the cam 24 to move. When the cam 24 moves closer to the swing arm 14, it will drive the swing arm 14 to rotate. The cam 24 is connected to the lower side of the linear guide rail 23. When the cam 24 moves closer to the swing arm 14, it will drive the swing arm 14 to rotate. When the swing arm 14 rotates, it will drive the pull rod 13 to move towards the lifting assembly 02. The movement of the pull rod 13 will drive the bearing wheel 12 to rotate, thereby lifting the bearing wheel 12.

[0028] Furthermore, the load-bearing wheel 12 and the fork arm welding frame 11 are connected by a pin to form a rotating pair, and the load-bearing wheel 12 can be rotated and retracted into the fork arm welding frame 11 and lifted.

[0029] Furthermore, the pull rod 13 and the bearing wheel 12 are connected by a pin to form a rotating pair. Moving the pull rod 13 toward the lifting assembly 02 can drive the bearing wheel 12 to be lifted and retracted into the fork arm welding frame 11.

[0030] Furthermore, the swing arm 14 and the tie rod 13 are connected by a pin to form a rotating pair. Rotating the swing arm 14 counterclockwise can drive the tie rod 13 to move towards the lifting assembly 02. The mounting bracket 21 is fixed to the vehicle body plate by bolts to ensure that the movement of the vehicle body can drive the lifting assembly 02 to move, thereby driving the pallet truck assembly 01 to move and enter the pallet truck.

[0031] Furthermore, the hydraulic cylinder 22 is bolted to the mounting bracket 21 to ensure the stability of the hydraulic cylinder 22. Activating the hydraulic cylinder 22 can drive the slider of the linear guide 23 to move, and the slider of the linear guide 23 can drive the cam 24 to move. The guide rail of the linear guide 23 is bolted to the mounting bracket 21 to ensure the stability of the guide rail position of the linear guide 23.

[0032] Furthermore, the cam 24 is bolted to the slider of the linear guide 23, ensuring that the slider of the linear guide 23 can drive the cam 24 to move. When the cam 24 moves closer to the rocker arm 14, it will drive the rocker arm 14 to rotate. The output end of the hydraulic cylinder 22 is fixedly connected to the slider of the linear guide 23, ensuring that after the hydraulic cylinder 22 is started, it can drive the slider of the linear guide 23 to move, and the slider of the linear guide 23 can drive the cam 24 to move.

[0033] Furthermore, the cam 24 has a groove corresponding to the rocker arm 14, which ensures that when the cam 24 approaches the rocker arm 14, it will drive the rocker arm 14 to rotate. While the rocker arm 14 rotates, it will drive the pull rod 13 to move towards the lifting assembly 02. The movement of the pull rod 13 will drive the bearing wheel 12 to rotate, thereby lifting the bearing wheel 12.

[0034] Working principle: In use, first install the mounting bracket 21 on the vehicle body plate. The vehicle moves towards the pallet truck assembly 01, causing the cam 24 to contact the swing arm 14. This activates the hydraulic cylinder 22, which drives the slider of the linear guide rail 23 towards the pallet truck assembly 01. The slider of the linear guide rail 23 then drives the cam 24 towards the pallet truck assembly 01. The cam 24's movement towards the swing arm 14 causes the swing arm 14 to rotate. Simultaneously, the rotation of the swing arm 14 causes the pull rod 13 to move towards the lifting assembly 02. The movement of the pull rod 13 causes the bearing wheel 12 to rotate, thus lifting the bearing wheel 12. The bearing wheel 12 retracts into the fork arm welding frame 11, and the vehicle continues to move forward, allowing the fork arm welding frame 11 to pass through the pallet truck. This is the complete working principle of the invention.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A wheel-lifting mechanism for a grid pallet cart, characterized in that, include: Pallet truck assembly (01), wherein a lifting assembly (02) is provided on one side of the pallet truck assembly (01). Pallet truck assembly (01), the pallet truck assembly (01) includes a fork arm welding frame (11), a load-bearing wheel (12) is provided inside one side of the fork arm welding frame (11), a pull rod (13) is provided on one side of the load-bearing wheel (12), and a swing arm (14) is installed at the end of the pull rod (13) away from the load-bearing wheel (12). The lifting assembly (02) includes a mounting bracket (21), a hydraulic cylinder (22) is mounted on one side of the mounting bracket (21), a linear guide rail (23) is provided on one side of the hydraulic cylinder (22), and a cam (24) is connected to the lower part of the linear guide rail (23).

2. The lifting wheel mechanism for a grid pallet cart according to claim 1, characterized in that: The load-bearing wheel (12) and the fork arm welding frame (11) are connected by a pin to form a rotating pair.

3. The lifting wheel mechanism for a grid pallet cart according to claim 2, characterized in that: The tie rod (13) and the bearing wheel (12) are connected by a pin to form a rotating pair.

4. The lifting wheel mechanism for a grid pallet cart according to claim 2, characterized in that: The swing arm (14) and the tie rod (13) are connected by a pin to form a rotating pair, and the mounting bracket (21) is fixed to the vehicle body plate by bolts.

5. A wheel-lifting mechanism for a grid pallet cart according to claim 2, characterized in that: The hydraulic cylinder (22) is connected to the mounting bracket (21) by bolts, and the guide rail of the linear guide rail (23) is connected to the mounting bracket (21) by bolts.

6. The wheel-lifting mechanism for a grid pallet cart according to claim 3, characterized in that: The cam (24) is bolted to the slider of the linear guide (23), and the output end of the cylinder (22) is fixedly connected to the slider of the linear guide (23).

7. A wheel-lifting mechanism for a grid pallet cart according to claim 4, characterized in that: The cam (24) has a groove corresponding to the rocker arm (14).

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