A pallet truck lifting device

Abstract

The utility model discloses a tray car hoisting device relates to the technical field of logistics transportation, including the bracket, the outside fixed frame of bracket is fixed with, one side of bracket is fixed with two groups of hydraulic rod, and the piston rod of hydraulic rod is fixed with the support plate, and both sides of support plate are all fixed with the guide frame, and the outside of guide frame is connected with the inner wall of bracket and slides, one side of guide frame is provided with the support frame, and the inner wall fixed of support frame has multiple groups of support rod. The utility model discloses beneficial effect is: through spring and damper cooperation, spring absorbs impact energy, and damper converts kinetic energy into heat energy dissipation, and the falling speed of guide frame is reduced significantly with both, reduces the impact to bracket and goods, protects device self, prevents goods from shaking and damaging, after the lifting of the support plate, and the positioning rod inserts the baffle positioning hole and forms mechanical locking, prevents accidental falling, and guarantees the safety of operation.

Description

Technical Field

[0001] This utility model relates to the field of logistics and transportation technology, and in particular to a pallet truck lifting device. Background Technology

[0002] Pallet trucks, also known as manual hydraulic pallet trucks, are a type of loading and unloading equipment widely used in logistics, warehousing, and factories. They are mainly operated manually, using a hydraulic system to lift and lower goods, and are pushed by manpower to complete short-distance transportation.

[0003] The lifting device of a pallet truck is a core functional component, which realizes the vertical lifting of goods through a hydraulic structure to adapt to the needs of handling, stacking, and loading and unloading at different heights. Existing lifting devices typically lift pallets using hydraulic rods. However, the pallets cannot be cushioned when falling, and the rapid falling speed can cause damage to goods during transportation or storage. The impact force during the fall is transmitted through the forks to critical components such as the hydraulic structure, frame, and wheel axles, shortening the service life of the equipment. Furthermore, once the pallet reaches the designated height, there is no way to position the pallet to prevent it from falling. If the pallet cannot be stably positioned at the designated height, it may slip or tip over due to vibration, external impact, or improper operation. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A pallet truck lifting device includes a bracket, a fixed frame fixed to the outer side of the bracket, two sets of hydraulic rods fixed to one side of the bracket, a support plate fixed to the piston rod of the hydraulic rod, guide frames fixed to both sides of the support plate, and the outer side of the guide frame slidably connected to the inner wall of the bracket, a support frame provided on one side of the guide frame, multiple sets of support rods fixed to the inner wall of the support frame, a support plate fixed to the outer side of the support rods, and a buffer assembly for buffering the guide frame inside the bracket. The buffer assembly includes a fixing plate fixed to the inner wall of the bracket, a damper fixed to the top of the fixing plate, and a partition fixed to the top of the damper. The bottom of the support plate is fixed with a baffle, and the bottom of the baffle is fixed to one side of the bracket. The inner cavity of the baffle has multiple sets of positioning holes. Positioning rods are inserted into the inner walls of the positioning holes. A connecting plate is fixed to one side of the positioning rod. An electric push rod that drives the positioning rod to move is provided on one side of the fixed frame.

[0006] In a preferred embodiment of the pallet truck lifting device of this utility model, two sets of support seats are fixed to the top of the fixed plate, and two sets of sleeves are fixed to the bottom of the partition plate, with the outer side of the sleeves slidably connected to the inner wall of the support seats.

[0007] In a preferred embodiment of the pallet truck lifting device of this utility model, two sets of sleeve rods are fixed to the top of the fixing plate, and the outer side of the sleeve rods is slidably connected to the inner wall of the sleeve. A spring is sleeved on the outer side of the sleeve rods, and the top of the spring is fixed to the bottom of the sleeve.

[0008] In a preferred embodiment of the pallet truck lifting device of this utility model, a mounting plate is fixed to one side of the fixing frame, and one side of the mounting plate is fixed to one side of the electric push rod, and the top rod of the electric push rod passes through the inner wall of the mounting plate and is fixed to one side of the connecting plate.

[0009] In a preferred embodiment of the pallet truck lifting device of this utility model, a limiting plate is fixed to the top of the fixing frame, and one end of the positioning rod penetrates the inner wall of the limiting plate.

[0010] As a preferred embodiment of the pallet truck lifting device of this utility model, a mounting bracket is fixed on one side of the fixed frame, and the inner cavity of the mounting bracket is provided with a mounting hole.

[0011] In a preferred embodiment of the pallet truck lifting device of this utility model, a fixed seat is fixed between the two sets of guide frames, and one side of the fixed seat is fixed to one side of the support frame.

[0012] In summary, this utility model has the following beneficial effects: by working together with the spring and the damper, the spring absorbs the impact energy and the damper converts the kinetic energy into heat energy for dissipation. The combination of the two significantly reduces the falling speed of the guide frame, reduces the impact on the bracket and the goods, protects the device itself, and prevents the goods from shaking and being damaged. After the pallet is raised, the positioning rod is inserted into the positioning hole of the baffle to form a mechanical lock, preventing accidental falling and ensuring operational safety. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a structural diagram of the pallet truck lifting device.

[0014] Figure 2 This is a structural schematic diagram of the fixing frame from another perspective in this utility model.

[0015] Figure 3 This is a schematic diagram of the connection structure between the bracket and the guide frame in this utility model.

[0016] Figure 4 for Figure 2 A magnified structural diagram of point A in the middle.

[0017] Figure 5 for Figure 3 A magnified structural diagram at point B in the middle.

[0018] The following are the labeling elements in the diagram: 1. Bracket; 2. Fixing frame; 3. Hydraulic rod; 4. Support plate; 5. Guide frame; 6. Support frame; 7. Support rod; 8. Support plate; 9. Buffer assembly; 91. Fixing plate; 92. Damper; 93. Partition plate; 10. Baffle; 11. Positioning rod; 12. Connecting plate; 13. Electric push rod; 14. Support seat; 15. Sleeve; 16. Sleeve rod; 17. Spring; 18. Mounting plate; 19. Limiting plate; 20. Mounting bracket; 21. Mounting hole; 22. Fixing seat. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0022] Example 1: Reference Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a pallet truck lifting device, including a bracket 1, a fixing frame 2 fixed on the outer side of the bracket 1, two sets of hydraulic rods 3 fixed on one side of the bracket 1, a support plate 4 fixed to the piston rod of the hydraulic rod 3, guide frames 5 fixed on both sides of the support plate 4, and the outer side of the guide frame 5 slidably connected to the inner wall of the bracket 1. A support frame 6 is provided on one side of the guide frame 5, multiple sets of support rods 7 are fixed on the inner wall of the support frame 6, a pallet plate 8 is fixed on the outer side of the support rods 7, and a buffer assembly 9 for buffering the guide frame 5 is provided inside the bracket 1.

[0023] Hydraulic rod 3 operates based on the incompressibility of liquids. When pressure is applied to one end, hydraulic oil is squeezed to the other end through internal oil passages. During this process, pressure is evenly transmitted through the hydraulic oil. Due to the difference in piston area at both ends of hydraulic rod 3, according to Pascal's law, a smaller force on the smaller piston is amplified and can generate a larger force sufficient to push heavy objects at the larger piston end. This enables small force to drive large force, easily completing heavy-duty tasks such as compaction and lifting. This is existing technology and will not be elaborated here. The two sets of hydraulic rods 3 are symmetrically designed to avoid tilting or jamming caused by single-rod drive. During startup, hydraulic oil flows through the diverter and combiner valve. The flow is then divided into two equal streams, which enter two sets of hydraulic rods 3 respectively, ensuring that the speeds of the two sets of hydraulic rods 3 are synchronized. The hydraulic rods 3 can drive the support plate 4 to rise and fall, which in turn drives the guide frame 5 to slide inside the bracket 1, thereby raising and lowering the support frame 6 and the pallet 8. The pallet 8 is the component that directly carries the goods and provides a platform for placing the goods. The buffer component 9 buffers the guide frame 5 when it falls, avoiding the problem of the guide frame 5 falling too fast and causing a large impact on the bracket 1. This not only protects the device, but also avoids the problem of the goods on the pallet 8 shaking and being damaged due to the impact of falling.

[0024] The buffer assembly 9 includes a fixing plate 91 fixed to the inner wall of the bracket 1, a damper 92 fixed to the top of the fixing plate 91, and a partition 93 fixed to the top of the damper 92.

[0025] The damper 92 is a viscous damper in the prior art. It utilizes the viscosity of the liquid to generate damping force through the throttling resistance when the fluid passes through the throttling orifice, thereby buffering the guide frame 5. When the guide frame 5 falls, it will first contact the partition 93, causing the partition 93 to move downward. The partition 93 applies pressure to the damper 92. The damper 92 uses the internal damping medium to convert the kinetic energy generated by the movement of the guide frame 5 into heat energy and dissipates it, thus playing a role in buffering and shock absorption, thereby buffering the guide frame 5 and reducing the impact force generated by the falling guide frame 5.

[0026] A baffle 10 is fixed to the bottom of the support plate 4, and the bottom of the baffle 10 is fixed to one side of the bracket 1. Multiple positioning holes are opened in the inner cavity of the baffle 10. A positioning rod 11 is inserted into the inner wall of the positioning hole. A connecting plate 12 is fixed to one side of the positioning rod 11. An electric push rod 13 that drives the positioning rod 11 to move is provided on one side of the fixing frame 2.

[0027] After the pallet 8 is lifted, the electric push rod 13 is activated to move the connecting plate 12, so that the positioning rod 11 is inserted into the positioning hole in the baffle 10, positioning the baffle 10 and the support plate 4. This prevents the support plate 4 and the guide frame 5 from moving due to unexpected factors when not in operation, thus avoiding safety accidents. At the same time, it improves the stability of the pallet 8 and prevents damage to goods caused by shaking during transportation. The electric push rod 13 is a drive device that converts the rotational motion of the motor into linear reciprocating motion. After the motor is powered on, it drives the internal reduction gear set to rotate. Through the helical transmission of the screw and nut, the rotational torque is converted into the linear displacement of the nut. The nut further drives the push rod to extend and retract axially, realizing the linear push-pull action.

[0028] Example 2: This is the second embodiment of the present invention, which is based on the previous embodiment.

[0029] Specifically, two sets of support seats 14 are fixed to the top of the fixed plate 91, and two sets of sleeves 15 are fixed to the bottom of the partition plate 93, with the outer side of the sleeve 15 slidably connected to the inner wall of the support seat 14.

[0030] The movement of the partition 93 will cause the sleeve 15 to slide inside the support 14, so that the partition 93 can move vertically up and down, thereby improving the stability of the movement of the partition 93.

[0031] Specifically, two sets of sleeve rods 16 are fixed to the top of the fixing plate 91, and the outer side of the sleeve rod 16 is slidably connected to the inner wall of the sleeve 15. A spring 17 is sleeved on the outer side of the sleeve rod 16, and the top of the spring 17 is fixed to the bottom of the sleeve 15.

[0032] The sleeve 15 moves and slides on the outside of the sleeve rod 16. The downward movement of the sleeve 15 compresses the spring 17. The spring 17 absorbs energy through its own elastic deformation. The spring 17, together with the damper 92, buffers the impact force of the guide frame 5 falling. The working principle of the damper 92 and the spring 17 working together is as follows: the damper 92 converts vibration energy into heat energy or other forms of energy and dissipates it through internal friction, adhesion or deformation, thereby reducing the amplitude of the device and suppressing vibration. The spring 17 stores and releases energy through elastic deformation, helping the device return to a balanced state. When the damper 92 and the spring 17 work together... In use, spring 17 can absorb and disperse external impacts and vibrations, reducing the direct impact on the device. At the same time, damper 92 can effectively absorb the energy generated by these impacts and vibrations, converting it into other forms of energy and dissipating it, thereby preventing the device from generating excessive amplitude due to energy accumulation. This synergistic working method can significantly improve the stability and performance of the device. This technology is common knowledge to those skilled in the art and will not be elaborated on here. The spring constant is at least 20,000 N / m. The parameters of spring 17 need to be adjusted through actual testing to ensure that its performance under actual working conditions meets the design requirements.

[0033] Specifically, a mounting plate 18 is fixed to one side of the fixing bracket 2, and one side of the mounting plate 18 is fixed to one side of the electric push rod 13. The top rod of the electric push rod 13 passes through the inner wall of the mounting plate 18 and is fixed to one side of the connecting plate 12.

[0034] Mounting plate 18 is used to mount electric actuator 13 to ensure the stability of electric actuator 13 during operation.

[0035] Specifically, a limiting plate 19 is fixed to the top of the fixing frame 2, and one end of the positioning rod 11 penetrates the inner wall of the limiting plate 19.

[0036] When the positioning rod 11 moves to a certain position, the limiting plate 19 will prevent the positioning rod 11 from moving further, thereby playing a limiting role. The positioning rod 11, connecting plate 12, limiting plate 19 and baffle 10 are all made of high-strength alloy steel and have been surface hardened to resist impact.

[0037] Example 3: This is the third embodiment of the present invention, which is based on the first two embodiments.

[0038] Specifically, a mounting bracket 20 is fixed to one side of the fixing bracket 2, and the inner cavity of the mounting bracket 20 is provided with a mounting hole 21.

[0039] The device can be installed on a pallet truck using the mounting bracket 20, allowing it to be flexibly applied to different pallet trucks and improving its versatility and applicability.

[0040] Specifically, a fixing seat 22 is fixed between the two sets of guide frames 5, and one side of the fixing seat 22 is fixed to one side of the support frame 6.

[0041] The fixed base 22 provides an additional fixed connection point for the support frame 6, enhancing the connection stability between the guide frame 5 and the support frame 6.

[0042] In use, pallet 8 is used to carry goods. The piston rod of hydraulic rod 3 extends and pushes support plate 4 to rise vertically, causing guide frames 5 on both sides to slide along the inner wall of bracket 1. Guide frames 5 are linked with support frame 6 through fixed seat 22, so that support rod 7 and pallet 8 are raised synchronously. During this process, the flow divider valve ensures that the flow of the two sets of hydraulic rods 3 is consistent, avoiding tilting or jamming of the vehicle body due to speed difference. When pallet 8 descends, when guide frame 5 descends to near the bottom of bracket 1, it first contacts partition plate 93. After partition plate 93 is pressed, it drives sleeve 15 to slide on the outside of sleeve rod 16, compressing spring 17 and triggering damper 92. 7 absorbs part of the impact energy through elastic deformation, while the damper 92 dissipates the kinetic energy into heat energy through the internal viscous fluid. The synergistic effect of the two significantly reduces the falling speed of the guide frame 5, avoiding impact damage to the bracket 1 and the goods. After the pallet 8 moves to the target height, the electric push rod 13 is activated, which pushes the connecting plate 12 and the positioning rod 11 to move laterally through the push rod. The positioning rod 11 is inserted into the positioning hole of the baffle 10 to form a mechanical locking structure, preventing the support plate 4 and the guide frame 5 from falling due to unexpected factors, ensuring operational safety, and improving the stability of the pallet 8, avoiding the problem of goods being damaged due to shaking during transportation.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pallet truck lifting device, comprising a bracket (1), characterized in that: A fixing frame (2) is fixed on the outside of the bracket (1). Two sets of hydraulic rods (3) are fixed on one side of the bracket (1). A support plate (4) is fixed on the piston rod of the hydraulic rod (3). Guide frames (5) are fixed on both sides of the support plate (4). The outer side of the guide frame (5) is slidably connected to the inner wall of the bracket (1). A support frame (6) is provided on one side of the guide frame (5). Multiple sets of support rods (7) are fixed on the inner wall of the support frame (6). A support plate (8) is fixed on the outer side of the support rod (7). A buffer assembly (9) for buffering the guide frame (5) is provided inside the bracket (1). The buffer assembly (9) includes a fixing plate (91) fixed to the inner wall of the bracket (1), a damper (92) fixed to the top of the fixing plate (91), and a partition plate (93) fixed to the top of the damper (92). The bottom of the support plate (4) is fixed with a baffle (10), and the bottom of the baffle (10) is fixed to one side of the bracket (1). The inner cavity of the baffle (10) has multiple sets of positioning holes. The inner wall of the positioning hole is inserted with a positioning rod (11). A connecting plate (12) is fixed to one side of the positioning rod (11). An electric push rod (13) that drives the positioning rod (11) to move is provided on one side of the fixing frame (2).

2. The pallet truck lifting device as described in claim 1, characterized in that: The top of the fixed plate (91) is fixed with two sets of support seats (14), and the bottom of the partition plate (93) is fixed with two sets of sleeves (15), and the outer side of the sleeves (15) is slidably connected to the inner wall of the support seats (14).

3. The pallet truck lifting device as described in claim 1, characterized in that: The top of the fixed plate (91) is fixed with two sets of sleeve rods (16), and the outer side of the sleeve rods (16) is slidably connected to the inner wall of the sleeve (15). A spring (17) is sleeved on the outer side of the sleeve rods (16), and the top of the spring (17) is fixed to the bottom of the sleeve (15).

4. The pallet truck lifting device as described in claim 1, characterized in that: The mounting plate (18) is fixed on one side of the fixed frame (2), and one side of the mounting plate (18) is fixed to one side of the electric push rod (13). The top rod of the electric push rod (13) passes through the inner wall of the mounting plate (18) and is fixed to one side of the connecting plate (12).

5. The pallet truck lifting device as described in claim 1, characterized in that: The top of the fixed frame (2) is fixed with a limiting plate (19), and one end of the positioning rod (11) penetrates the inner wall of the limiting plate (19).

6. The pallet truck lifting device as described in claim 1, characterized in that: The mounting bracket (20) is fixed on one side of the fixed bracket (2), and the mounting bracket (20) has a mounting hole (21) in its inner cavity.

7. The pallet truck lifting device as described in claim 1, characterized in that: A fixing seat (22) is fixed between the two sets of guide frames (5), and one side of the fixing seat (22) is fixed to one side of the support frame (6).

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