A transport vehicle

Abstract

This utility model relates to the field of logistics and transportation technology, and discloses a transport vehicle, including a main body with two roller assemblies at its bottom and a support member located between the roller assemblies, wherein the support member and the axes of the two roller assemblies are staggered; a lifting assembly including a movable rod and a connecting rod structure, the movable rod being vertically mounted on the main body and having a clamping assembly on it, the connecting rod structure including a vertically arranged first connecting rod and a second connecting rod, one end of the first connecting rod being connected to the movable rod and the other end being hinged to the second connecting rod to form a first hinge point, the second connecting rod being hinged to the main body to form a second hinge point, and having a foot pedal on it; when the user applies pressure to the foot pedal, the support member abuts against the ground, the second connecting rod rotates around the second hinge point, and drives the first hinge point to displace along a preset trajectory, so that the first connecting rod drives the movable rod to perform lifting and lowering movements. The advantages of this utility model are that it has a simple structure, is easy to operate, and has low production costs.

Description

Technical Field

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

[0002] Oil drums, as common containers for liquids or semi-solid materials, require specialized equipment for handling and transportation. Traditional oil drum transport vehicles typically include a movable support frame with a clamping structure and a lifting mechanism. The clamping structure holds the oil drum in place, preventing it from shaking or tipping over during transport. The lifting mechanism, connected to the clamping structure, drives the clamping structure to lift the oil drum off the ground, enabling its lifting and transport. However, most oil drum transport vehicles currently on the market rely on motor-driven lead screws and hydraulic drives for their lifting mechanisms. While these methods meet certain usage requirements, they generally suffer from complex structures, numerous components, high manufacturing costs, and difficult maintenance. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a transport vehicle that is simple in structure, easy to operate and has low production cost.

[0004] The technical solution adopted by this utility model to solve its technical problem is a transport vehicle, comprising:

[0005] The body has two roller assemblies rotatably provided at its bottom, and a support member located between the two roller assemblies, wherein the support member is arranged in a staggered manner with respect to the axes of the two roller assemblies.

[0006] A lifting assembly includes a movable rod and a connecting rod structure. The movable rod is vertically mounted on the body and is equipped with a clamping assembly. The connecting rod structure includes a vertically arranged first connecting rod and a second connecting rod. One end of the first connecting rod is connected to the movable rod, and the other end is hinged to the second connecting rod to form a first hinge point. The second connecting rod is hinged to the body to form a second hinge point, and a foot pedal is also provided on the second connecting rod.

[0007] When the user applies pressure to the foot pedal, the support is forced to contact the ground, the second link is forced to rotate around the second hinge point, and the first hinge point is displaced along a preset trajectory, so that the first link drives the movable rod to move up and down.

[0008] Furthermore, the second connecting rod includes a hinge portion and an extension portion. The hinge portion is provided with a first hinge hole and a second hinge hole arranged at intervals. The first hinge hole is hinged to the first connecting rod through a pivot, and the second hinge hole is hinged to the body through a pivot. The extension portion is vertically disposed below the second hinge hole and extends away from the hinge portion. The foot pedal is vertically connected to the side of the extension portion away from the hinge portion.

[0009] Furthermore, the centers of the first hinge hole and the second hinge hole are staggered, and the straight-line distance from the first hinge hole to the body is less than the straight-line distance from the second hinge hole to the body.

[0010] Furthermore, the body includes a first load-bearing structure and a second load-bearing structure that are perpendicularly connected to each other. The first load-bearing structure is arranged vertically and is slidably connected to the movable rod. The hinged part is hinged to the first load-bearing structure. The second load-bearing structure is arc-shaped. The roller assemblies are respectively located at both ends of the second load-bearing structure. The support member is vertically located in the middle of the second load-bearing structure.

[0011] Furthermore, a first fixing seat is provided on the outer wall of the movable rod. The first fixing seat extends horizontally in a direction away from the movable rod and has a first mounting hole that is detachably connected to the first connecting rod. A second fixing seat is provided on the outer wall of the first load-bearing structure and is aligned vertically with the first fixing seat. The second fixing seat extends horizontally in a direction away from the first load-bearing structure and has a second mounting hole that is hinged to the second hinge hole through a rotating shaft. The extension length of the second fixing seat is greater than the extension length of the first fixing seat.

[0012] Furthermore, the second load-bearing structure has a limiting plate in the middle, the limiting plate has a first limiting groove and a second limiting groove, the support member includes a movable part rotatably connected to the limiting plate, the movable part is provided with a ball, and the movable part has a third rotation position and a fourth rotation position; when the movable part is in the third rotation position, the support member is vertically arranged, and the ball is engaged in the first limiting groove and remains fixed; when the movable part is in the fourth rotation position, the support member is horizontally arranged, and the ball is engaged in the second limiting groove and remains fixed.

[0013] Furthermore, the top of the movable rod is provided with a mounting part, the clamping assembly is provided on the mounting part, and two handles connected to the outer wall of the movable rod are provided below the mounting part. The two handles are arranged symmetrically and extend horizontally away from the movable rod, and the extended length of the handles is greater than the length of the movable rod.

[0014] Furthermore, the system includes a locking assembly comprising a positioning plate disposed below the connecting rod structure and connected to the body, and a locking member rotatably disposed on the positioning plate. The positioning plate has a first notch for the end of the second connecting rod to extend into, and the locking member has a first rotational position and a second rotational position. When the locking member is in the first rotational position, it can fix the end of the second connecting rod in the first notch. When the locking member is in the second rotational position, it can allow the end of the second connecting rod to freely enter and exit the first notch.

[0015] Furthermore, the locking assembly also includes an elastic element, one end of which is detachably fixed to the positioning plate, and the other end is connected to the side of the locking element away from the first notch. The elastic element can drive the locking element to switch between the first rotation position and the second rotation position through its own elastic deformation.

[0016] Further, the locking member includes a second notch and an adjusting hole. The second notch is located on the side of the locking member closer to the first notch, and has a locking portion and an opening that are perpendicular to each other and communicate with each other. The locking portion is parallel to the first notch and extends along the movement direction of the second connecting rod. The end of the second connecting rod can be engaged into the locking portion through the opening. The adjusting hole is on the same straight line as the locking portion and is rotatably connected to the positioning plate through a fixed shaft. The adjusting hole extends along the movement direction of the second connecting rod. The fixed shaft can move relative to the adjusting hole along its length direction and has a first moving position and a second moving position. When the fixed shaft is in the first moving position, the elastic member applies a pulling force to the locking member to rotate towards the first rotating position. When the fixed shaft is in the second moving position, the elastic member applies a pulling force to the locking member to rotate towards the second rotating position.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. In this utility model, the bottom of the main body is provided with a support member located between two roller assemblies and arranged offset from the axes of the two roller assemblies; the lifting assembly includes a movable rod and a connecting rod structure. The movable rod is vertically mounted on the main body and is provided with a clamping assembly for clamping materials. The connecting rod structure includes a vertically arranged first connecting rod and a second connecting rod. One end of the first connecting rod is connected to the movable rod, and the other end is hinged to the second connecting rod to form a first hinge point. The second connecting rod is hinged to the main body to form a second hinge point, and a foot pedal is also provided on the second connecting rod. When the user applies pressure to the foot pedal, the support member is forced to abut against the ground, and the second connecting rod is forced to rotate around the second hinge point, causing the first hinge point to move along a preset trajectory, so that the first connecting rod drives the movable rod to perform lifting and lowering movements, thereby realizing the height adjustment of the clamping assembly. This design uses a linkage mechanism to link with the foot pedal, replacing the motor or hydraulic drive with a purely mechanical structure, which significantly reduces the number of parts, lowers production costs and maintenance difficulty; at the same time, the reasonable layout of the support components improves the ease of operation and the stability of force application, making the device safer, more efficient and easier to control.

[0019] 2. In this utility model, the locking assembly includes a positioning plate located below the connecting rod structure and connected to the main body, and a locking member rotatably mounted on the positioning plate. The positioning plate has a first notch for the end of the second connecting rod to extend into, and the locking member has a first rotational position and a second rotational position. When the locking member is in the first rotational position, it can fix the end of the second connecting rod in the first notch, realizing the locking function of the connecting rod structure and preventing unexpected displacement caused by external force during lifting. When the locking member is in the second rotational position, it allows the end of the second connecting rod to freely enter the first notch, realizing the unlocking of the connecting rod structure, so that the user can flexibly adjust the lifting state according to actual operating needs. This design realizes the locking and releasing of the lifting mechanism through the rotational movement of the locking member, without the need for additional power or complex control system. It has a simple structure, is easy to operate, and responds quickly, which not only improves the safety of the device, but also enhances the adaptability to working conditions and the convenience of use.

[0020] 3. In this utility model, a limiting plate is provided in the middle of the second load-bearing structure. The limiting plate has a first limiting groove and a second limiting groove. The support member includes a movable part that is rotatably connected to the limiting plate. The movable part is provided with a ball bearing and has a third rotation position and a fourth rotation position. When the movable part is in the third rotation position, the support member is vertically arranged, and the ball bearing is engaged in the first limiting groove and remains fixed. When the movable part is in the fourth rotation position, the support member is horizontally arranged, and the ball bearing is engaged in the second limiting groove and remains fixed. This design allows the support member to stably contact the ground during lifting operations to form a three-point support, enhancing overall stability. When not in use, it can be folded up to a horizontal position for easy movement of the device. In addition, this purely mechanical locking design does not require additional locking components, making the structure simple, reliable, and easy to manufacture and maintain. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a transport vehicle according to the present invention.

[0022] Figure 2 This is an exploded view of a transport vehicle according to the present invention.

[0023] Figure 3 for Figure 1 A structural diagram from another perspective.

[0024] Figure 4 This is a schematic diagram of the locking component in the unlocked state of this utility model.

[0025] Figure 5 This is a schematic diagram of the locking component in the present invention when it is in the initial locked state.

[0026] Figure 6 This is a schematic diagram of the locking component in the locked state in this utility model.

[0027] Figure 7 This is a schematic diagram of the locking component in the initial unlocked state of this utility model.

[0028] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0029] 100. Body; 110. First load-bearing structure; 120. Second load-bearing structure; 121. Limiting plate; 122. First limiting groove; 123. Second limiting groove; 200. Roller assembly; 210. Mounting bracket; 220. Roller; 230. Support arm; 300. Support component; 310. Movable part; 400. Movable rod; 410. Mounting part; 420. Handle; 500. Linkage structure; 510. First link; 520. Second link; 521. Hinge part; 5 22. Extension; 523. First hinge hole; 524. Second hinge hole; 600. Clamping assembly; 700. Foot pedal; 800. First fixing seat; 801. First mounting hole; 810. Second fixing seat; 811. Second mounting hole; 900. Locking assembly; 910. Positioning plate; 911. First notch; 920. Locking element; 921. Second notch; 922. Adjustment hole; 923. Locking part; 924. Opening; 925. Fixed shaft; 930. Elastic element. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0035] like Figures 1 to 7 As shown, in this embodiment, a transport vehicle includes:

[0036] The main body 100 has two roller assemblies 200 rotatably provided at its bottom, and a support member 300 located between the two roller assemblies 200. The support member 300 is arranged in a staggered manner with the axis of the two roller assemblies 200, so that automatic and stable support can be achieved during the lifting process.

[0037] The lifting assembly includes a movable rod 400 and a connecting rod structure 500. The movable rod 400 is vertically mounted on the body 100 and is equipped with a clamping assembly 600 for clamping materials. The connecting rod structure 500 includes a vertically arranged first connecting rod 510 and a second connecting rod 520. One end of the first connecting rod 510 is connected to the movable rod 400, and the other end is hinged to the second connecting rod 520 to form a first hinge point. The second connecting rod 520 is hinged to the body 100 to form a second hinge point. The second connecting rod 520 is also equipped with a foot pedal 700 for the user to apply force for operation.

[0038] When the user applies pressure to the foot pedal 700, the second link 520 rotates around the second hinge point, causing the first hinge point to move along a preset trajectory, thereby pushing the first link 510 to move, further causing the movable rod 400 to rise or fall, realizing the height adjustment of the clamping assembly 600. Simultaneously, under the action of the foot pedal, the support member 300 is subjected to force and comes into contact with the ground, forming a stable three-point support structure, enhancing the overall stability and safety of the device. This design, through the linkage mechanism and the foot pedal 700, replaces the motor or hydraulic drive with a purely mechanical structure, significantly reducing the number of parts and lowering production costs and maintenance difficulty; at the same time, relying on the reasonable layout of the support member 300, it improves the ease of operation and the stability of force application, making the device safer, more efficient, and easier to control.

[0039] like Figures 1 to 7 As shown, in this embodiment, the transport vehicle includes, from top to bottom, a clamping assembly 600, a lifting assembly, a body 100, a roller assembly 200, a support member 300, and a locking assembly 900. It is mainly used for transporting cylindrical or near-cylindrical materials such as oil drums, and is particularly suitable for efficient and safe handling of containers such as oil drums in industries such as chemical, warehousing, and logistics.

[0040] Specifically, in this embodiment, the body 100 serves as the core load-bearing structure of the entire device, and its overall structure includes a first load-bearing structure 110 and a second load-bearing structure 120 that are perpendicularly connected to each other. The first load-bearing structure 110 is vertically arranged and forms a sliding connection with the movable rod 400, guiding the lifting and lowering movement of the movable rod 400. The second load-bearing structure 120 is horizontally positioned below the first load-bearing structure 110 and is vertically connected to it, together forming a complete load-bearing frame.

[0041] Preferably, in this embodiment, both the first load-bearing structure 110 and the second load-bearing structure 120 are made of high-strength metal materials, such as carbon steel, stainless steel or aluminum alloy, to ensure that they have good mechanical strength, wear resistance and deformation resistance, so as to effectively bear the weight of the clamping component 600 and the material being transported, and maintain structural stability and safety during lifting, moving and supporting.

[0042] In this embodiment, the first load-bearing structure 110 and the second load-bearing structure 120 are reliably connected by welding or fasteners. Preferably, they are connected by welding, which effectively enhances the rigidity and stability of the overall structure, avoids loosening of the connection due to long-term use or changes in stress, and thus improves the service life and safety performance of the device.

[0043] In this embodiment, the first load-bearing structure 110 is a rectangular strip or a hollow cylindrical rod. Preferably, it is a hollow cylindrical rod. When the first load-bearing structure 110 is a rectangular strip, its cross-sectional shape is rectangular or square tube, which has high bending stiffness and load-bearing capacity. It is equipped with guide rails, grooves, or linear sliders (not shown in the figure) to form a sliding connection with the movable rod 400, thereby achieving precise guidance of the lifting and lowering movement of the movable rod 400. This guiding method effectively prevents the movable rod 400 from shifting, tilting, or swaying during lifting and lowering, significantly improving the operational stability and reliability of the clamping assembly 600, and ensuring safety and accuracy when clamping oil drums or other materials. When the first load-bearing structure 110 is a hollow cylindrical rod, its interior is hollow, with an inner diameter slightly larger than the outer diameter of the movable rod 400, and it is slidably fitted onto the outside of the movable rod 400 to form a coaxial guiding structure. This design has the advantages of compact structure, high guiding accuracy and easy assembly. At the same time, it can also play a certain role in dust protection, preventing external impurities from entering and affecting the guiding performance.

[0044] In this embodiment, the second load-bearing structure 120 has an arc-shaped design, with both ends extending away from the center and symmetrically positioned below the first load-bearing structure 110, serving as a crucial load-bearing and connecting component of the entire transport vehicle. This design not only enhances the overall frame's mechanical strength and resistance to deformation but also provides excellent spatial adaptability. When handling cylindrical materials such as oil drums, it can better conform to the outer contour of the drum, thereby effectively supporting and limiting the material, preventing it from swaying or shifting during transportation, and significantly improving clamping stability and operational safety.

[0045] In this embodiment, the two roller assemblies 200 have the same structure and are respectively disposed at both ends of the second load-bearing structure 120. They are fixedly connected to the second load-bearing structure 120 by welding or fastener connection to realize the flexible movement function of the transport vehicle.

[0046] In this embodiment, each roller assembly 200 includes a mounting bracket 210 and a roller 220, which is rotatably mounted on the mounting bracket 210 to facilitate the user to push the entire transport vehicle to move freely on the ground.

[0047] Preferably, in this embodiment, the two mounting brackets 210 are respectively connected to the first load-bearing structure 110 via support arms 230. The support arm 230 has an arc-shaped structure, with one end welded to the outer wall of the first load-bearing structure 110 and the other end welded to the top of the mounting bracket 210, thereby forming a stable mechanical support path between the roller assembly 200 and the body 100, effectively transferring the load borne by the roller 220 to the entire body 100. This design not only enhances the connection strength and overall rigidity between the roller assembly 200 and the body 100, but also further expands the contact area between the transport vehicle and the clamped materials such as oil drums through a reasonable spatial layout, improving stability and support reliability during clamping and effectively preventing tilting or sliding of materials during handling.

[0048] In this embodiment, a vertically arranged limiting plate 121 is provided in the middle of the second support structure facing the ground, for installing and positioning the support member 300. The limiting plate 121 has a rectangular structure and is preferably made of metal sheet, which has good structural strength and wear resistance.

[0049] In this embodiment, the limiting plate 121 is fixed to the second load-bearing structure 120 by welding or fastener connection to achieve precise control over the rotation state of the support member 300. Preferably, the limiting plate 121 is fixed to the second load-bearing structure 120 by fastener connection, which facilitates disassembly, replacement or maintenance in the later stage, and improves the maintainability and structural flexibility of the device.

[0050] In this embodiment, the limiting plate 121 is provided with a first limiting groove 122 and a second limiting groove 123 that are circular. The first limiting groove 122 and the second limiting groove 123 are opened in different directions, and there is a 90° angle between their center lines to accommodate the rotation angle changes of the support member 300 under different working conditions. This design allows the ball bearings to smoothly enter the corresponding limiting grooves during the rotation of the support member 300, thereby achieving precise positioning and stable locking of the support member 300.

[0051] In this embodiment, the support member 300 is located between the two roller assemblies 200 and is staggered with the axes of the two roller assemblies 200. That is, its position is not coplanar or symmetrically distributed with the rotation axis of either roller 220. This arrangement allows the overall center of gravity of the device to shift forward or downward during lifting operations when the user applies pressure by stepping on the foot pedal 700, causing the support member 300 to come into close contact with the ground. Furthermore, this staggered arrangement allows the support member 300 and the two roller assemblies 200 to form a stable three-point support structure, thereby significantly improving the stability and safety of the transport vehicle in lifting and parking states, and preventing tipping or sliding caused by center of gravity shift or external forces.

[0052] In this embodiment, the support member 300 is vertically disposed in the middle of the second load-bearing structure 120. It includes a movable part 310 rotatably connected to the limiting plate 121. The end of the movable part 310 away from the ground is provided with a ball bearing for engaging with the first limiting groove 122 and the second limiting groove 123 on the limiting plate 121. Preferably, the movable part 310 is rotatably connected to the limiting plate 121 via a rotating shaft (not shown in the figure). When the support member 300 rotates around the limiting plate 121, the ball bearing on it can be engaged into the corresponding first limiting groove 122 or second limiting groove 123 under the action of external force, thereby achieving precise positioning and locking of the support member 300.

[0053] In this embodiment, the movable part 310 has two stable working positions: a third rotation position and a fourth rotation position. When the movable part 310 is in the third rotation position, the support member 300 is arranged vertically. At this time, the ball bearings are engaged in the first limiting groove 122 and remain fixed, so that the support member 300 stably abuts the ground, forming a three-point support structure, which enhances the stability and safety of the device in lifting or parking states. When the movable part 310 is rotated to the fourth rotation position, the support member 300 switches to a horizontal storage state, the ball bearings are engaged in the second limiting groove 123 and remain fixed, and the support member 300 is folded up at the bottom of the device, which is convenient for the transport vehicle to move.

[0054] In this embodiment, through the cooperation structure of the first limiting groove 122, the second limiting groove 123, and the ball bearing, the support member 300 can flexibly switch between a vertical support state and a horizontal storage state, and achieve reliable locking in each state, preventing unexpected rotation or slippage caused by external forces, thus significantly improving the safety and convenience of operation. Furthermore, this purely mechanical locking design requires no additional locking components, has a simple and reliable structure, and is easy to manufacture and maintain.

[0055] In this embodiment, a second fixed seat 810 is provided on the outer wall of the first load-bearing structure 110 away from the second load-bearing structure 120. The second fixed seat 810 is aligned vertically with the first fixed seat 800 provided on the movable rod 400 to ensure that the force on the connecting rod structure 500 is uniform and to improve the stability of the lifting action.

[0056] In this embodiment, the second fixed base 810 extends horizontally in a direction away from the first load-bearing structure 110 and is provided with a second mounting hole 811 for hinged connection of the connecting rod structure 500. The second mounting hole 811 is hinged to the second hinge hole 524 provided on the connecting rod structure 500 by a rotating shaft, thereby forming one of the rotation fulcrums of the connecting rod structure 500.

[0057] In this embodiment, the extension length of the second fixed seat 810 is greater than the extension length of the first fixed seat 800. This design not only provides a more reasonable force support layout for the linkage structure 500, but also enhances the mechanical stability of the overall structure, so that when the user steps on the foot pedal 700, the lifting component can be driven to complete the height adjustment of the clamping component 600 more effortlessly and smoothly.

[0058] In this embodiment, the second fixed base 810 is composed of one or two fixed plates with second mounting holes 811, which provide a hinge fulcrum for the second connecting rod 520. Preferably, the second fixed base 810 consists of two symmetrically arranged fixed plates, each with aligned second mounting holes 811, and arranged opposite each other in the horizontal direction. A certain gap is maintained between the two fixed plates to accommodate the connecting rod structure 500 and allow it to rotate freely within the gap, thereby achieving a stable hinged connection between the second connecting rod 520 and the second fixed base 810. This design not only improves the strength and stability of the connection but also effectively prevents the second connecting rod 520 from shifting or jamming during movement, improving the overall transmission efficiency. In addition, the double fixed plate structure has higher load-bearing capacity and torsional stiffness than single-sided fixing, which can better withstand the complex loads generated during lifting operations, extend the service life of the device, and improve the safety and reliability of operation.

[0059] Preferably, in this embodiment, the second fixing seat 810 and the first load-bearing structure 110 are fixedly connected by welding to ensure that they have high structural strength and connection reliability.

[0060] To achieve stable clamping and securing of materials such as oil drums, a clamping assembly 600 is provided in this embodiment. This clamping assembly 600 is mounted on the top of the transport vehicle and connected to the movable rod 400 of the lifting assembly, allowing for height adjustment along with the lifting assembly. When the user drives the lifting assembly via the foot pedal 700, the movable rod 400 raises the clamping assembly 600, lifting the oil drum from the ground and enabling its transport.

[0061] Preferably, in this embodiment, the clamping assembly 600 is fixed to the mounting portion 410 at the top of the movable rod 400 by welding to ensure good structural strength and connection reliability during lifting and transportation.

[0062] It is worth noting that the working principle of the clamping component 600 is the same as that of the clamping mechanism commonly used in the prior art, and its specific structure and operating principle will not be described in detail here.

[0063] To achieve height adjustment of the clamping assembly 600, a lifting component is provided in this embodiment. This lifting component includes a movable rod 400 and a connecting rod structure 500. The movable rod 400 is vertically mounted on the first load-bearing structure 110 of the main body 100, and is used to drive the clamping assembly 600 at the top to move up and down, thereby completing the lifting and handling operations of materials such as oil drums. Preferably, the movable rod 400 is a hollow cylindrical rod structure, with its outer diameter smaller than the inner diameter of the first load-bearing structure 110, and is slidably fitted inside the first load-bearing structure 110 to form a coaxial guide structure. This structure not only has the characteristics of high guiding accuracy and smooth movement, but also has the advantages of compact structure and convenient assembly, while effectively preventing the entry of external impurities and improving the durability and reliability of the guiding system.

[0064] In this embodiment, the movable rod 400 and the first load-bearing structure 110 may be fitted with a clearance or a rolling guide component (not shown in the figure) may be provided to reduce frictional resistance and improve the smoothness and response speed of the lifting operation.

[0065] In this embodiment, the top of the movable rod 400 is provided with a mounting portion 410, which has a disc-shaped structure. This mounting portion 410 provides a mounting base for the clamping assembly 600 and ensures uniform force distribution and stable operation during lifting. Preferably, the mounting portion 410 is coaxially arranged with the movable rod 400, and its outer diameter is larger than the diameter of the movable rod 400 to provide sufficient installation space and load-bearing area.

[0066] In this embodiment, two handles 420 connected to the outer wall of the movable rod 400 are provided below the mounting part 410. The two handles 420 are symmetrically arranged and extend horizontally away from the movable rod 400. The extended length of the handles 420 is greater than the length of the movable rod 400, forming an outwardly protruding operating grip area. This design not only facilitates manual pushing or position adjustment of the transport vehicle during handling, but also serves as an auxiliary force application point during lifting operations, improving the overall ease of operation and ergonomic performance. At the same time, the symmetrical arrangement of the handles 420 also helps to balance the force, preventing the device from tilting or shaking due to uneven force during operation.

[0067] Preferably, in this embodiment, the handle 420 and the movable rod 400 are fixedly connected by welding to ensure high structural strength and connection reliability between them.

[0068] In this embodiment, a first fixing seat 800 is provided on the outer wall of the movable rod 400 near the handle 420. The first fixing seat 800 extends horizontally away from the movable rod 400 and provides a fixing fulcrum for the first connecting rod 510. The extended end of the first fixing seat 800 is provided with a first mounting hole 801 that is detachably connected to the first connecting rod 510, so as to fix the first connecting rod 510 to the movable rod 400, thereby transmitting the operating force applied by the user to the foot pedal 700 to the movable rod 400, driving it to perform lifting and lowering movements. This design not only improves the strength and stability of the connection between the first connecting rod 510 and the movable rod 400, but also significantly improves the assembly flexibility and maintenance convenience between components, making it easier to replace, adjust or repair the connecting rod structure 500 during later use, and extending the overall service life of the device.

[0069] In this embodiment, the first fixed base 800 is composed of one or two fixed plates with first mounting holes 801, used to provide a fixed fulcrum for the first connecting rod 510. Preferably, the first fixed base 800 consists of two symmetrically arranged fixed plates, each with aligned first mounting holes 801, and arranged opposite each other in the horizontal direction. A certain gap is maintained between the two fixed plates to clamp the first connecting rod 510, thereby achieving a stable connection between the first connecting rod 510 and the first fixed base 800. This design further improves the strength and stability of the connection, can better withstand the complex loads generated during lifting operations, extends the service life of the device, and improves the safety and reliability of operation.

[0070] In this embodiment, the linkage structure 500 includes a vertically arranged first linkage 510 and a second linkage 520. One end of the first linkage 510 is connected to the movable rod 400, and the other end is hinged to the second linkage 520 to form a first hinge point. The second linkage 520 is hinged to the first load-bearing structure 110 of the body 100 to form a second hinge point. A foot pedal 700 is also provided on the second linkage 520 as a user input terminal, allowing the user to apply downward pressure to drive the entire lifting action. When the user applies pressure to the foot pedal 700, the support member 300 is forced to abut against the ground, and the second linkage 520 is forced to rotate around the second hinge point, causing the first hinge point to displace along a preset trajectory. This displacement is transmitted to the movable rod 400 through the first linkage 510, causing the movable rod 400 to move linearly up and down along the length of the first load-bearing structure 110, thereby realizing the height adjustment function of the clamping assembly 600. The linkage structure 500 adopts a purely mechanical transmission design, requiring no additional power source. It has the advantages of simple structure, rapid response, and low maintenance cost, and is particularly suitable for use in scenarios with frequent handling operations and in environments without power.

[0071] Preferably, in this embodiment, the first link 510 is located on the side closer to the movable rod 400, and the second link 520 is located on the side of the first link 510 away from the movable rod 400, with the two arranged in a staggered manner. The length of the first link 510 is less than the length of the second link 520. This design not only enhances the overall structural mechanical stability but also provides a better lever arm for the foot pedal 700, allowing the user to drive the movable rod 400 to complete the lifting and lowering action with a smaller operating force, thus improving the effortlessness and convenience of operation. Furthermore, this layout also helps avoid motion interference between components, ensuring the smooth operation and structural durability of the link structure 500 during frequent lifting and lowering operations.

[0072] In this embodiment, the first connecting rod 510 has a rectangular strip structure with semi-circular ends, forming a structure with a straight section in the middle and arc transitions at both ends. This design not only helps to reduce the weight of the connecting rod itself, but also improves the uniformity of the overall force distribution while ensuring structural strength.

[0073] In this embodiment, the second connecting rod 520 includes a hinge portion 521 and an extension portion 522. The hinge portion 521 is fan-shaped and has first hinge holes 523 and second hinge holes 524 arranged at intervals along the circumference or radial direction for multi-point hinged connections. Specifically, the first hinge hole 523 is hinged to the first connecting rod 510 via a rotating shaft, forming a first hinge point; the second hinge hole 524 is hinged to the second fixed seat 810 provided on the first load-bearing structure 110 via a rotating shaft, forming a second hinge point. This design not only improves the connection flexibility between the second connecting rod 520 and other components but also provides multiple assembly angle options for the connecting rod structure 500, facilitating adjustment of the transmission ratio or operating stroke of the lifting assembly according to actual working conditions, thus enhancing the adaptability and functionality of the device. In addition, the spacing and angle relationship between the first hinge hole 523 and the second hinge hole 524 optimizes the force path of the entire linkage structure 500, improves the smoothness of the lifting action and the ease of operation, and also helps to avoid jamming or interference during the movement, thereby improving the reliability of the whole machine operation.

[0074] In this embodiment, the centers of the first hinge hole 523 and the second hinge hole 524 are staggered, meaning they are not on the same horizontal or vertical line, forming a certain offset angle. This layout helps optimize the motion trajectory of the linkage structure 500 and improves the transmission smoothness and mechanical efficiency of the lifting assembly during operation. Furthermore, the straight-line distance from the first hinge hole 523 to the first load-bearing structure 110 of the body 100 is less than the straight-line distance from the second hinge hole 524 to the first load-bearing structure 110 of the body 100. In other words, the first hinge hole 523 is closer to the first load-bearing structure 110 than the second hinge hole 524. This design helps to shorten the length of the force arm of the first link 510, thereby improving its transmission rigidity and response speed.

[0075] In this embodiment, the extension 522 has a rectangular strip structure, is vertically arranged below the second hinge hole 524, and extends in a direction away from the hinge 521, forming the main force-bearing and transmission part of the second link 520. It is used to receive the operating force applied by the user through the foot pedal 700 and transmit the force to the entire linkage mechanism, thereby driving the lifting assembly to complete the height adjustment action of the clamping assembly 600.

[0076] Preferably, in this embodiment, the width of the extended end of the extension 522 is smaller than the width of the middle portion, forming a tapered structural design. This design not only helps to reduce the overall structural weight, but also facilitates its use with the locking component 900, allowing the locking component 900 to achieve effective limiting function without being too large. This avoids affecting the overall compactness and ease of operation of the machine due to an excessively large locking structure, and improves the engineering practicality and manufacturability of the overall structure.

[0077] In this embodiment, the foot pedal 700 has a cylindrical structure, is horizontally welded to the extension 522, and is arranged perpendicularly to the extension 522, thereby forming an operating fulcrum that facilitates the user's stepping force. This connection method not only ensures a robust structure and uniform force distribution, but also improves the stability and durability of the overall device under frequent stepping operations.

[0078] Preferably, in this embodiment, a limiting ring is provided at the end of the foot pedal 700 opposite to the extension 522, and the diameter of the limiting ring is larger than the diameter of the foot pedal 700. This can prevent the user's foot from slipping during the pedaling operation, improving the safety and stability of the operation.

[0079] In this embodiment, the limiting ring can be fixed to the end of the foot pedal 700 by welding, threaded connection or integral molding. Welding is preferred to ensure connection strength and adapt to the impact load caused by frequent pedaling operations.

[0080] To lock the clamping assembly 600 in position after lifting and lowering adjustment and prevent unexpected descent when not in operation, a locking assembly 900 is also provided in this embodiment. The locking assembly 900 includes a positioning plate 910 located below the connecting rod structure 500 and connected to the body 100, and a locking member 920 rotatably mounted on the positioning plate 910. The positioning plate 910 has a first notch 911 for the end of the second connecting rod 520 to extend into, used to limit the engagement of the connecting rod structure 500 after the lifting and lowering action is completed. The locking member 920 has a first rotational position and a second rotational position; when the locking member 920 is in the first rotational position, it can fix the end of the second connecting rod 520 within the first notch 911, achieving mechanical locking of the entire connecting rod structure 500, keeping the movable rod 400 and the clamping assembly 600 at a set height position, and preventing unexpected descent due to gravity or external vibration. When the locking element 920 is in the second rotational position, the end of the second link 520 can freely enter and exit the first notch 911, thereby unlocking the link structure 500 and allowing the lifting assembly to continue height adjustment, improving operational flexibility. This design achieves effective locking and rapid release of the lifting mechanism through the rotational movement of the locking element 920, without the need for additional power or complex control systems. It features a simple structure, convenient operation, and rapid response, enhancing both device safety and adaptability to various working conditions, as well as ease of use.

[0081] In this embodiment, as Figure 6 As shown, the first rotational position refers to the position where the center line of the locking member 920 in its length direction is completely aligned with the center line of the first notch 911 on the positioning plate 910 in the same direction. Figure 4 As shown, the second rotational position refers to the position where the centerline of the locking member 920 in its length direction forms an acute angle with the centerline of the first notch 911 on the positioning plate 910 in the same direction.

[0082] In this embodiment, the positioning plate 910 has a rectangular plate structure, is horizontally set at the bottom of the first load-bearing structure 110, and is perpendicular to the first load-bearing structure 110, so as to ensure that the spatial fit between it and the connecting rod structure 500 is reasonable, thereby improving the stability and load-bearing capacity of the overall structure.

[0083] Preferably, in this embodiment, the positioning plate 910 and the first load-bearing structure 110 are fixedly connected by welding to ensure that the two have high structural strength and connection reliability, prevent the limit failure or device shaking due to loose connection, and further improve the stability and service life of the whole machine.

[0084] In this embodiment, the first notch 911 is U-shaped and horizontally recessed towards the first load-bearing structure 110, allowing the end of the extension 522 of the second link 520 to extend into it, thus achieving a height-limiting engagement of the lifting assembly. This design not only facilitates the entry and exit of the end of the second link 520 but also provides good limiting support in the locked state, preventing lateral displacement or swaying of the link structure 500, thereby enhancing the stability and safety of the transport vehicle during handling.

[0085] In this embodiment, the locking member 920 has a rectangular plate structure and is disposed on the side of the positioning plate 910 facing the ground, and is arranged parallel to the positioning plate 910 to ensure that it has good spatial adaptability and force stability during operation.

[0086] In this embodiment, the locking member 920 includes a second notch 921 and an adjustment hole 922. The second notch 921 is located on the side of the locking member 920 near the first notch 911, and has a locking portion 923 and an opening 924 that are perpendicular to and communicate with each other. The locking portion 923 is parallel to the first notch 911 and extends along the movement direction of the second link 520, used to limit and fix the end of the second link 520 in the locked state; the end of the second link 520 can be engaged into the locking portion 923 through the opening 924 to achieve switching between the locked and released states. When the end of the second link 520 is engaged into the locking portion 923 through the opening 924, it will be confined within the locking portion 923, thereby achieving height locking of the entire linkage mechanism and preventing the clamping assembly 600 from descending unexpectedly.

[0087] In this embodiment, the adjustment hole 922 is located on the side of the locking member 920 away from the second notch 921, and is on the same straight line as the locking part 923. It is rotatably connected to the positioning plate 910 through the fixed shaft 925. The adjustment hole 922 extends along the movement direction of the second connecting rod 520, so that the fixed shaft 925 can move relative to the length direction of the adjustment hole 922, thereby realizing the function switching of the locking member 920 in different position states.

[0088] In this embodiment, the locking member 920 moves when the foot pedal 700 is subjected to force, thereby causing the fixed shaft 925, which is fixedly mounted on the positioning plate 910, to have a first moving position and a second moving position relative to the adjusting hole 922. Figure 5 As shown, the first moving position is when the fixed shaft 925 is located at the top of the adjusting hole 922. When the fixed shaft 925 is in the first moving position, the elastic member 930 applies a pulling force to the locking member 920 to rotate it towards the first rotating position, thereby making the locking part 923 directly above the extension part 522, so as to achieve initial locking of the connecting rod structure 520; as Figure 4As shown, the second moving position is when the fixed shaft 925 is located at the bottom of the adjusting hole 922. When the fixed shaft 925 is in the second moving position, the elastic member 930 applies a pulling force to the locking member 920 to rotate towards the second rotating position. At this time, if the extension 522 is aligned with the opening 924, the linkage structure 520 can be unlocked.

[0089] To enable the automatic rotation reset and position switching of the locking member 920, in this embodiment, the locking assembly 900 further includes an elastic member 930 located in the same horizontal plane as the locking member 920. The elastic member 930 and the locking member 920 form a linkage relationship to achieve automatic switching between different operating states.

[0090] In this embodiment, one end of the elastic element 930 is detachably fixed to the positioning plate 910 by screws, and the other end is connected to the side of the locking element 920 away from the first notch 911. The elastic element 930 can switch between a first rotational position and a second rotational position through its own elastic deformation. This design not only improves the ease of operation and response speed of the locking assembly 900, but also simplifies the structure of the locking assembly 900.

[0091] Preferably, the elastic element 930 is a spring. It has the advantages of mature structure, sensitive response, and strong load-bearing capacity, and can adapt to the mechanical requirements under frequent operation, while also having good durability and assembly adaptability.

[0092] This utility model also provides a method for transporting oil drums. The method uses the aforementioned transport vehicle for handling operations, which can achieve rapid clamping, lifting and adjusting, and stable movement of heavy objects such as oil drums. It has the advantages of simple operation, high safety, and strong applicability.

[0093] In this embodiment, the transportation method includes the following steps:

[0094] Positioning and placement: Push the transport vehicle to the vicinity of the oil drum to be transported, and manually operate the handle 420 to place the oil drum under the clamping component 600, ensuring that the oil drum is within the working range of the clamping component 600;

[0095] Clamping and fixing: Manually operate the clamping component 600 to make it fit against the outer wall of the top of the oil drum and clamp the top edge of the oil drum to ensure that the oil drum will not shift or slip during transportation;

[0096] Lifting operation: The user holds the handle 420 and steps on the foot pedal 700. The support 300 is subjected to force and comes into contact with the ground. The second connecting rod 520 is subjected to force and rotates around the second hinge point, so that the first connecting rod 510 drives the movable rod 400 and the clamping assembly 600 to rise along the first load-bearing structure 110, thereby making the oil drum leave the ground and reach a suitable height for handling.

[0097] Locking limit: During the lifting process, the extension 522 of the second link 520 moves toward the first notch 911 on the positioning plate 910, its end enters the first notch 911, and abuts against the inner wall of the second notch 921 of the locking member 920 along the opening 924; Figure 5 As shown, with the continuous movement of the extension 522, the locking member 920 can be pushed downward, causing the fixed shaft 925 to move from the second moving position (which is the initial position) to the first moving position. Simultaneously, the elastic member 930 is stretched, and the locking member 920 rotates from the second rotational position (which is the initial position) to the first rotational position, achieving initial locking of the locking member 920. Figure 6 As shown, when the force applied to the foot pedal 700 is released, the second link 520 (which is tilted during operation) moves away from the positioning plate 920 under its own weight, causing the end of the extension 522 to engage with the locking part 923, and driving the locking part 920 to move outward synchronously until the fixed shaft 925 is in the first moving position. Since the extension 522 is limited by the locking part 923, the locking part 920 does not rotate, and the second link 520 is fixed in the first notch 911, thus achieving reliable locking of the height position of the clamping assembly 600 and preventing it from falling due to vibration or external force during transportation.

[0098] Mobile transport: Propel the transport vehicle and use the roller assembly 200 to smoothly transfer the oil drums to the target location;

[0099] Release and reset: such as Figure 7 As shown, upon reaching the destination, the user again grips the handle 420 and steps on the foot pedal 700. The support 300 is then pressed against the ground, causing the second link 520 to rotate around the second hinge point. This pushes the extension 522 of the second link 520 towards the bottom of the first notch 911. When it moves to the position aligned with the opening 924, the locking part 923 releases its restriction on the extension 522. At this point, the locking part 920 can rotate towards the second rotation position, achieving initial unlocking. Figure 4 As shown, when the locking member 920 rotates to the second rotation position, the second connecting rod 520 can disengage from the first notch 911, thus fully unlocking the second connecting rod 520. This allows the first connecting rod 510 to lower the movable rod 400 and the clamping assembly 600, bringing the oil drum into contact with the ground. At this point, releasing the clamping assembly 600 completes the unloading of the oil drum. When the locking member 920 rotates to the second rotation position, the locking part 923 is misaligned with the first notch 911, providing a passageway for the end of the second connecting rod 520 to enter the first notch 911 for the next handling operation.

Claims

1. A transport vehicle, characterized in that, include: The body has two roller assemblies rotatably provided at its bottom, and a support member located between the two roller assemblies, wherein the support member is arranged in a staggered manner with respect to the axes of the two roller assemblies. A lifting assembly includes a movable rod and a connecting rod structure. The movable rod is vertically mounted on the body and is equipped with a clamping assembly. The connecting rod structure includes a vertically arranged first connecting rod and a second connecting rod. One end of the first connecting rod is connected to the movable rod, and the other end is hinged to the second connecting rod to form a first hinge point. The second connecting rod is hinged to the body to form a second hinge point, and a foot pedal is also provided on the second connecting rod. When the user applies pressure to the foot pedal, the support is forced to contact the ground, the second link is forced to rotate around the second hinge point, and the first hinge point is displaced along a preset trajectory, so that the first link drives the movable rod to move up and down.

2. A transport vehicle according to claim 1, characterized in that, The second connecting rod includes a hinge portion and an extension portion. The hinge portion is provided with a first hinge hole and a second hinge hole arranged at intervals. The first hinge hole is hinged to the first connecting rod through a rotating shaft, and the second hinge hole is hinged to the body through a rotating shaft. The extension portion is vertically disposed below the second hinge hole and extends away from the hinge portion. The foot pedal is vertically connected to the side of the extension portion away from the hinge portion.

3. A transport vehicle according to claim 2, characterized in that, The centers of the first hinge hole and the second hinge hole are staggered, and the straight-line distance from the first hinge hole to the body is less than the straight-line distance from the second hinge hole to the body.

4. A transport vehicle according to claim 2, characterized in that, The main body includes a first load-bearing structure and a second load-bearing structure that are perpendicularly connected to each other. The first load-bearing structure is arranged vertically and is slidably connected to the movable rod. The hinged part is hinged to the first load-bearing structure. The second load-bearing structure is arc-shaped. The roller assemblies are respectively located at both ends of the second load-bearing structure. The support member is vertically located in the middle of the second load-bearing structure.

5. A transport vehicle according to claim 4, characterized in that, The outer wall of the movable rod is provided with a first fixed seat, which extends horizontally away from the movable rod and has a first mounting hole that is detachably connected to the first connecting rod. The outer wall of the first load-bearing structure is provided with a second fixed seat that is vertically aligned with the first fixed seat. The second fixed seat extends horizontally away from the first load-bearing structure and has a second mounting hole that is hinged to the second hinge hole through a pivot. The extension length of the second fixed seat is greater than the extension length of the first fixed seat.

6. A transport vehicle according to claim 4, characterized in that, The second load-bearing structure has a limiting plate in the middle, and the limiting plate has a first limiting groove and a second limiting groove. The support member includes a movable part that is rotatably connected to the limiting plate. The movable part is provided with a ball bearing, and the movable part has a third rotation position and a fourth rotation position. When the movable part is in the third rotation position, the support member is vertically arranged, and the ball bearing is engaged in the first limiting groove and remains fixed. When the movable part is in the fourth rotation position, the support member is horizontally arranged, and the ball bearing is engaged in the second limiting groove and remains fixed.

7. A transport vehicle according to claim 1, characterized in that, The top of the movable rod is provided with a mounting part, the clamping assembly is provided on the mounting part, and two handles connected to the outer wall of the movable rod are provided below the mounting part. The two handles are arranged symmetrically and extend horizontally away from the movable rod, and the extended length of the handles is greater than the length of the movable rod.

8. A transport vehicle according to claim 1, characterized in that, The system includes a locking assembly, which comprises a positioning plate located below the connecting rod structure and connected to the body, and a locking member rotatably disposed on the positioning plate. The positioning plate has a first notch for the end of the second connecting rod to extend into, and the locking member has a first rotational position and a second rotational position. When the locking member is in the first rotational position, it can fix the end of the second connecting rod in the first notch. When the locking member is in the second rotational position, it can allow the end of the second connecting rod to freely enter and exit the first notch.

9. A transport vehicle according to claim 8, characterized in that, The locking assembly also includes an elastic element, one end of which is detachably fixed to the positioning plate, and the other end is connected to the side of the locking element away from the first notch. The elastic element can drive the locking element to switch between the first rotation position and the second rotation position through its own elastic deformation.

10. A transport vehicle according to claim 9, characterized in that, The locking member includes a second notch and an adjustment hole. The second notch is located on the side of the locking member closer to the first notch and has a locking portion and an opening that are perpendicular to each other and communicate with each other. The locking portion is parallel to the first notch and extends along the movement direction of the second connecting rod. The end of the second connecting rod can be engaged into the locking portion through the opening. The adjustment hole is on the same straight line as the locking portion and is rotatably connected to the positioning plate through a fixed shaft. The adjustment hole extends along the movement direction of the second connecting rod. The fixed shaft can move relative to the length direction of the adjustment hole and has a first moving position and a second moving position. When the fixed shaft is in the first moving position, the elastic member applies a pulling force to the locking member to rotate towards the first rotating position. When the fixed shaft is in the second moving position, the elastic member applies a pulling force to the locking member to rotate towards the second rotating position.

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