Forklift wheel lifting device

Abstract

The utility model relates to the forklift manufacturing technology, particularly discloses a forklift wheel lifting device, and aims to solve the problem that a forklift is difficult to move when power is lost. The device comprises a hinge connecting rod mechanism, a driving arm and a fixed surface, a non-closed chain type structure is formed by at least four hinges and at least three connecting rods, and rotation of the connecting rods in the same plane is achieved. The head hinge is fixed to the fixing face, the tail hinge is fixed to the wheel mechanism, and the driving arm is connected with the middle connecting rod and drives the middle connecting rod to do reciprocating rectilinear motion, so that the forklift wheels are lifted. According to the device, the moving friction resistance can be obviously reduced, the forklift can be easily moved by manpower under the unpowered condition, and the device is simple in structural design, low in cost, easy and convenient to operate, widely suitable for various forklifts and high in universality and practicability.

Description

Technical Field

[0001] This utility model relates to the field of forklift manufacturing technology, and in particular to a forklift wheel lifting device. Background Technology

[0002] With the continuous advancement of forklift technology and the expanding application scenarios, forklifts are increasingly being used in scenarios requiring high-precision operations, such as production line docking, warehouse docking, and equipment docking. As an indispensable core power mechanism on forklifts, the steering wheel is particularly widely used in the field of automated guided vehicles (AGVs). Its high structural reliability and wide applicability have led to its widespread adoption in the forklift industry. Currently, most forklift steering wheels on the market use an independent suspension structure mounted on the mast. This design can adapt to uneven ground conditions to a certain extent, improving the forklift's operational flexibility.

[0003] However, when power is lost due to factors such as battery depletion or steering wheel malfunction, the steering wheel, which is rigidly connected to the power system, rests directly on the ground, preventing it from rotating freely. This makes it difficult to move the forklift even manually, significantly impacting operational efficiency and convenience. Therefore, a quick and reliable mechanism is urgently needed to facilitate easy movement of the forklift to a designated location, avoiding operational delays and efficiency losses caused by malfunctions. Utility Model Content

[0004] The main purpose of this utility model is to provide a forklift wheel lifting device to solve the technical problem in the prior art that it is difficult to move a forklift manually when the forklift loses power.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a forklift wheel lifting device, comprising:

[0006] The device includes: a hinge linkage mechanism, a drive arm, and a fixed surface; the hinge linkage mechanism includes: at least four hinges and at least three links; the number of hinges is even, and the number of links is one less than the number of hinges; each hinge is connected to the others by the links to form a non-closed chain structure, and all links can rotate around the point connected to the hinge in the same plane; the head hinge at one end of the hinge linkage mechanism is fixedly installed on the fixed surface, and the tail hinge at the other end is fixedly installed on the wheel mechanism; one end of the drive arm is connected to the fixed surface, and the drive arm is perpendicular to and connected to the middle link in the hinge linkage mechanism, and is used to drive the middle link to perform reciprocating linear motion along the axial direction of the drive arm.

[0007] Optionally, one end of the drive arm is connected to the fixed surface, and the drive arm is perpendicular to and connected to the intermediate link in the hinge linkage mechanism, used to drive the intermediate link to perform reciprocating linear motion along the axial direction of the drive arm, specifically including:

[0008] The drive arm uses a screw, one end of which is rotatably fixed to the fixed surface. The screw and the center connecting rod are connected by a vertically arranged threaded connection, which is used to drive the center connecting rod to reciprocate linearly along the axial direction of the screw by rotating the screw.

[0009] Optionally, the hinge linkage mechanism includes: at least four hinges and at least three links; the number of hinges is even, and the number of links is one less than the number of hinges, specifically including:

[0010] The number of hinges is set to four, and the number of links is three.

[0011] Optionally, the device further includes a rocker arm mechanism, which is directly connected to the screw or connected via a transmission method, for driving the screw to rotate.

[0012] Optionally, the device further includes a locking mechanism, which is connected to the screw and the fixed surface respectively, and has a manual opening and closing function; when the locking mechanism is in the open state, the screw and the fixed surface can rotate freely; and when the locking mechanism is in the closed state, it can lock the rotational movement of the screw relative to the fixed surface, thereby effectively preventing the wheel mechanism from falling unexpectedly due to gravity during the lifting process.

[0013] Optionally, the device further includes: an additional component consisting of another set of hinge linkage mechanisms and fixed surfaces identical to those in the forklift wheel lifting device; the two fixed surfaces, including the additional component, are vertically parallel and opposite to each other; the two hinge linkage mechanisms are arranged opposite and parallel to each other in the inner regions of the two fixed surfaces; and the screw is threadedly connected to the two oppositely arranged center links of the two hinge linkage mechanisms in a mutually perpendicular manner; the two ends of the screw are rotatably fixed to the two fixed surfaces; at the same time, the head hinges at one end of the two hinge linkage mechanisms are securely mounted on the two fixed surfaces, while the tail hinges at the other end are fixedly mounted on the wheel mechanism.

[0014] Optionally, one end of the drive arm is connected to the fixed surface, and the drive arm is perpendicular to and connected to the intermediate link in the hinge linkage mechanism, used to drive the intermediate link to perform reciprocating linear motion along the axial direction of the drive arm, specifically including:

[0015] The drive arm includes a hydraulic rod, hydraulic lines, hydraulic oil, and a manual pump. One end of the hydraulic rod is connected to the fixed surface, and the other end is vertically fixed to the center link. The manual pump is connected to the hydraulic rod through the hydraulic lines to achieve a sealed connection that allows the transmission of hydraulic oil. It is used to generate hydraulic pressure by manually operating the manual pump to drive the center link to reciprocate linearly along the axial direction of the hydraulic rod.

[0016] Optionally, the fixed surface includes a driven wheel, which is disposed in the bottom area of ​​the fixed surface and is capable of rotating freely. It is used to support the lifted component after the wheel mechanism completes the lifting action, and to enable the component to move under the rolling action of the driven wheel.

[0017] Optionally, the driven wheel includes a universal joint, which is located at the center of the axle of the driven wheel or at a fixed structure connected to the driven wheel, and is used to enable the driven wheel to freely turn when the forklift wheel lifting device moves.

[0018] Optionally, the hinge linkage mechanism includes: at least four hinges and at least three links; the number of hinges is even, and the number of links is one less than the number of hinges, specifically including:

[0019] The number of hinges is set to six, and the number of links is five.

[0020] The forklift wheel lifting device of this application has at least the following beneficial effects:

[0021] By utilizing the synergistic effect of the hinge linkage mechanism and the drive arm, the drive wheels or steering wheels of the forklift can be significantly raised, reducing frictional resistance during movement. Even if the forklift loses power, it can be easily moved manually. Its simple structural design facilitates manufacturing and installation, effectively reducing costs. The operation process is simple and quick, requiring only the drive arm to lift. In addition, this device is widely applicable to various types of forklifts, demonstrating strong versatility. Attached Figure Description

[0022] Figure 1 A schematic diagram of a forklift wheel lifting device provided by this utility model;

[0023] Figure 2 A schematic diagram of a forklift wheel lifting device including a rocker arm mechanism and a locking mechanism provided by this utility model;

[0024] Figure 3 A schematic diagram of a forklift wheel lifting device including additional components provided by this utility model;

[0025] Figure 4A schematic diagram of a forklift wheel lifting device including a driven wheel and a universal joint mechanism provided by this utility model;

[0026] Figure 5 A schematic diagram of a forklift wheel lifting device comprising six hinges and five links provided for this utility model;

[0027] Figure label:

[0028] Hinged linkage mechanism-1, drive arm-2, fixed surface-3, hinge-4, connecting rod-5, wheel mechanism-6, rocker arm mechanism-7, locking mechanism-8, additional components-9, driven wheel-10, universal joint mechanism-11. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] Example 1

[0032] like Figure 1 The illustration shows an embodiment of a forklift wheel lifting device provided in this application. The forklift wheel lifting device includes: a hinge linkage mechanism 1, a drive arm 2, and a fixed surface 3. The hinge linkage mechanism 1 includes: at least four hinges 4 and at least three links 5. The number of hinges 4 is even, and the number of links 5 is one less than the number of hinges 4. Each hinge 4 is connected to the others by the links 5 to form a non-closed chain structure. All links 5 can rotate around the point connected to the hinge 4 in the same plane. The head hinge 4 at one end of the hinge linkage mechanism 1 is fixedly installed on the fixed surface 3, and the tail hinge 4 at the other end is fixedly installed on the wheel mechanism 6. One end of the drive arm 2 is connected to the fixed surface 3, and the drive arm 2 is perpendicular to and connected to the middle link 5 located in the middle position of the hinge linkage mechanism 1, for driving the middle link 5 to reciprocate linearly along the axial direction of the drive arm 2.

[0033] Specifically, in this embodiment, "hinge linkage mechanism 1" refers to a non-closed chain structure composed of at least four hinges 4 and at least three links 5, used to realize relative rotational motion between links 5; "drive arm 2" refers to a component connected to the fixed surface 3, used to drive the middle link 5 in the hinge linkage mechanism 1 to perform reciprocating linear motion; "fixed surface 3" refers to a fixed structure used to install the head hinge 4 and drive arm 2 of the hinge linkage mechanism 1. A "chain structure" refers to a non-closed connection structure consisting of at least four hinges 4 and at least three links 5. The hinges 4 are connected one-to-one by the links 5, forming a continuous path capable of transmitting force and motion. This structure allows the links 5 to rotate within the same plane around the points connected to the hinges 4, thus achieving complex movements such as lifting or lowering. A "head hinge 4" refers to a hinge 4 located at one end of the hinge linkage mechanism 1, fixedly mounted on the fixed surface 3. As one of the starting or ending points of the chain structure, the head hinge 4 supports and fixes the entire chain structure, while allowing the chain structure to rotate and move relative to the fixed surface 3. A "tail hinge 4" refers to a hinge 4 located at the other end of the hinge linkage mechanism 1... At the end, the hinge 4, fixedly installed on the wheel mechanism 6, corresponds to the head hinge 4. The tail hinge 4 also serves to support and fix the chain structure, but it is the connection point between the chain structure and the wheel mechanism 6, allowing the chain structure to drive the wheel mechanism 6 to perform lifting or lowering actions. The "middle link 5" refers to the link 5 located in the middle position in the hinge link mechanism 1. It connects the front and rear hinges 4 and is connected to the fixed surface 3 through the drive arm 2. Under the action of the drive arm 2, the middle link 5 can reciprocate linearly along the axial direction of the drive arm 2, thereby driving the entire chain structure to perform complex movements such as lifting or lowering. The position and function of the middle link 5 make it one of the key components in the chain structure to achieve the lifting function.

[0034] The reason for adopting the above technical solution is that, through the non-closed chain structure of the hinge linkage mechanism 1, relative rotational motion between the links 5 can be achieved. This allows the drive arm 2 to drive the center link 5 in reciprocating linear motion, which in turn drives the entire hinge linkage mechanism 1 to move, thereby lifting the forklift's drive wheels or steering wheels. This structure has the advantages of simple structure, convenient operation, and significant lifting effect.

[0035] In one possible implementation, when the forklift experiences a loss of power, such as a depleted battery or a malfunctioning steering wheel, the forklift wheel lifting device can be activated. This device, via the drive arm 2, pushes the center linkage 5 in a reciprocating linear motion along its axis, thereby activating the entire hinge linkage mechanism 1. This motion causes the drive wheel or steering wheel, connected to the rear hinge 4, to gradually rise to a certain height, while simultaneously compressing the suspension springs of the wheel axle, thus lifting the wheel off the ground. Subsequently, with the assistance of components such as the forklift driven wheel 10, the forklift can be easily moved to a designated position manually. Importantly, this forklift wheel lifting device is directly connected to the axle mechanism of the forklift's drive wheel or steering wheel, ensuring that it functions quickly and effectively when the forklift loses power.

[0036] Compared with existing technologies, the forklift wheel lifting device of this application has the following technical advantages: Utilizing the synergistic effect of the hinge linkage mechanism 1 and the drive arm 2, it can significantly lift the drive wheels or steering wheels of the forklift, reducing moving friction resistance. Even if the forklift loses power, it can be easily moved manually. Its structural design is simple, easy to manufacture and install, and effectively reduces costs. The operation process is simple and quick, requiring only the drive arm 2 to drive the lifting. Furthermore, this device is widely applicable to various types of forklifts, demonstrating strong versatility. In summary, this invention not only has significant technical advantages but also broad application prospects.

[0037] Example 2

[0038] Based on the first embodiment described above, this application also provides another forklift wheel lifting device, such as... Figure 1 As shown, it includes: a hinge linkage mechanism 1, a drive arm 2, and a fixed surface 3; the hinge linkage mechanism 1 includes: at least four hinges 4 and at least three links 5; the number of hinges 4 is even, and the number of links 5 is one less than the number of hinges 4; each hinge 4 is connected to the other one by one through the link 5 to form a non-closed chain structure, and all links 5 can rotate around the point connected to the hinge 4 in the same plane; the head hinge 4 at one end of the hinge linkage mechanism 1 is fixedly installed on the fixed surface 3, and the tail hinge 4 at the other end is fixedly installed on the wheel mechanism 6;

[0039] The drive arm 2 uses a screw, one end of which is rotatably fixed to the fixed surface 3. The screw and the intermediate connecting rod 5 are connected by a vertically arranged threaded connection, which is used to drive the intermediate connecting rod 5 to reciprocate linearly along the axial direction of the screw by rotating the screw.

[0040] Specifically, in this embodiment, a "screw" refers to a cylindrical rod with external threads, designed to transmit torque and achieve linear displacement conversion through rotational motion. "Rotatable fixed connection" means that one end of the screw is connected to the fixed surface 3 (such as a forklift frame or other fixed structure) via rotating connectors such as bearings or bushings, allowing the screw to rotate freely relative to the fixed surface 3 without axial movement. "Vertically arranged threaded connection" means that the external threads on the screw match the corresponding internal threads on the intermediate connecting rod 5 in the vertical direction, allowing the intermediate connecting rod 5 to reciprocate linearly along the axial direction of the screw by rotating the screw.

[0041] In this embodiment, a screw is used as the driving arm 2, combined with a vertically arranged threaded connection, mainly based on the following considerations: First, the screw has a simple structure, low manufacturing cost, and good mechanical strength and stability, making it suitable as a driving component; second, by rotating the screw to drive the intermediate connecting rod 5, the conversion from rotary motion to linear motion is realized, which is simple to operate and easy to control; third, the vertically arranged threaded connection ensures the accuracy and stability of the motion direction, avoiding problems such as poor motion or failure caused by thread tilting or misalignment; finally, this connection method facilitates adjustment and maintenance, improving the overall reliability and service life of the device.

[0042] Optionally, the drive arm 2 of the forklift wheel lifting device is a precision-machined screw. One end of the screw is rotatably fixed to the forklift frame or other fixed structure via a high-strength bearing, ensuring stability during rotation. The other end of the screw is connected to the center link 5 via a vertically arranged thread, and the center link 5 has an internal thread hole that matches the screw thread. When it is necessary to lift the forklift wheel, the operator can rotate the screw using a hand tool or electric device. Due to the meshing of the threads, the center link 5 will reciprocate linearly along the axial direction of the screw, thereby driving the entire hinge linkage mechanism 1 and the connected drive wheel or steering wheel to lift.

[0043] In this embodiment, the screw described herein is used as the drive arm 2, combined with a vertically arranged threaded connection, resulting in significant technical advantages: First, it improves the lifting efficiency and stability of the forklift wheel lifting device, ensuring smooth and reliable lifting action through precise threaded connection; second, it simplifies the device structure, reduces manufacturing costs and maintenance difficulty, and improves the device's cost-effectiveness; third, it enhances the device's applicability and flexibility, allowing for easy control of lifting height and speed by adjusting the screw's rotation direction and speed, meeting the needs of different scenarios. In summary, this embodiment provides an efficient, stable, and economical solution for forklift wheel lifting devices.

[0044] In a preferred embodiment, the number of hinges 4 is set to four, and the number of links 5 is three.

[0045] Specifically, in this embodiment, the forklift wheel lifting device is designed with four hinges 4 and three connecting rods 5. This design incorporates multiple considerations. First, the careful arrangement of the four hinges 4 ensures more even support and connection points for the lifting mechanism. This not only improves the stability and load-bearing capacity of the entire structure but also effectively avoids structural damage or deformation that may occur due to excessive force at a single point during lifting. Second, the ingenious cooperation between the three connecting rods 5 and the four hinges 4 creates a complex yet coordinated kinematic chain, making the lifting action smoother and more fluid, reducing impact and vibration during movement, thereby improving lifting efficiency and user comfort. Finally, through the rational planning of the hinge 4 and connecting rod 5 layout, this design achieves efficient lifting within a limited space while maintaining structural compactness and aesthetics, perfectly adapting to the space requirements of forklifts and other equipment.

[0046] In one possible implementation, firstly, four hinges 4 are precisely positioned at four key locations on the lifting mechanism, forming a stable quadrilateral support structure. These hinges 4 are rotatably connected to connecting rods 5 or other components via pins or bolts, ensuring flexible movement. Secondly, three connecting rods 5 are cleverly connected between adjacent hinges 4, forming a continuous motion chain. The length and shape of the connecting rods 5 are meticulously designed to maintain appropriate angles and positions during lifting, thus achieving smooth lifting. Finally, the lifting mechanism drives one or more connecting rods 5 to reciprocate via a drive device (such as a hydraulic system), thereby lifting the entire mechanism. During lifting, the coordinated movement of the four hinges 4 and the three connecting rods 5 makes the lifting action smoother and more efficient.

[0047] The forklift wheel lifting device described in this embodiment has the following technical effects: First, the arrangement of the four hinges 4 greatly enhances the stability of the entire lifting mechanism, significantly reducing the risk of structural damage caused by excessive force at a single point. Second, the cooperation between the three connecting rods 5 and the four hinges 4 makes the lifting action smoother and more continuous, effectively reducing impact and vibration during movement, thereby improving lifting efficiency and user comfort. Finally, the forklift wheel lifting device of this embodiment has a compact and aesthetically pleasing structure, and can flexibly adapt to various space and weight constraints, meeting the diverse needs of different users. In summary, this embodiment, through the reasonable layout of the hinges 4 and connecting rods 5, successfully achieves the efficient and stable lifting function of the forklift wheel lifting device, demonstrating broad application prospects and market value.

[0048] In a preferred embodiment, such as Figure 2As shown, the forklift wheel lifting device also includes a rocker arm mechanism 7, which is directly connected to the screw or connected via a transmission method to drive the screw to rotate.

[0049] Specifically, in this embodiment, the "rocker arm mechanism 7" refers to a mechanical component that typically has a structure where one end is fixed and the other end can swing freely, used to transmit or convert force or motion. In this forklift wheel lifting device, the rocker arm mechanism 7, as part of the drive assembly, is used to drive the screw to rotate. "Direct connection" means that there are no intermediate transmission elements between the rocker arm mechanism 7 and the screw; they are directly connected via keys, pins, threads, etc., allowing the swing of the rocker arm mechanism 7 to directly drive the screw to rotate. "Transmission method" refers to the connection between the rocker arm mechanism 7 and the screw via transmission mechanisms such as gears, chains, belts, worm gears, etc., to achieve the transmission and conversion of force or motion.

[0050] In the design of the forklift wheel lifting device, the rocker arm mechanism 7 is used as the component driving the screw rotation, mainly based on the following considerations: First, the rocker arm mechanism 7 can provide sufficient torque through manual operation or a power source (such as a motor) to drive the screw rotation, thereby achieving efficient lifting function. Second, the connection method between the rocker arm mechanism 7 and the screw is highly flexible, and a direct connection or a transmission connection can be selected according to actual needs. Direct connection is more suitable for applications with simple structure and compact space; while transmission connection is more suitable for situations that require increased torque, changes in rotation direction, or long-distance driving. Finally, as an independent component, the rocker arm mechanism 7's ease of disassembly and replacement greatly reduces maintenance costs and time.

[0051] In one possible implementation, firstly, the design of the rocker arm mechanism 7 ensures that one end is securely mounted to the main structure of the device via a fixed base or bracket, while the other end is designed with a connection shape that matches the screw. The length, material, and cross-sectional shape of the rocker arm mechanism 7 are precisely calculated and optimized based on the required driving force and strength. Regarding the connection method, two options are provided: direct connection and transmission connection. Direct connection achieves a direct connection between the rocker arm mechanism 7 and the screw through keyways, pin holes, etc., ensuring that the oscillation can be directly converted into rotational motion; while transmission connection effectively transmits the oscillation of the rocker arm mechanism 7 to the screw through transmission mechanisms such as gear sets, chain drives, or belt drives. In the design of the transmission mechanism, factors such as transmission efficiency, noise control, and wear are also fully considered. Preferably, the rocker arm mechanism 7 is also equipped with various drive device options, including manual operation (such as a handle, crank) and power source drive (such as a motor, hydraulic cylinder), to ensure smooth and continuous oscillation in various application scenarios, thereby improving lifting efficiency and stability.

[0052] The forklift wheel lifting device described in this embodiment offers significant technical advantages. First, the introduction of the rocker arm mechanism 7 provides additional driving force, significantly enhancing its lifting capacity and enabling it to bear greater weight. Second, the direct or transmission-based connection between the rocker arm mechanism 7 and the screw achieves efficient force or motion transmission, thereby greatly improving lifting efficiency. Furthermore, the flexibility of the connection method between the rocker arm mechanism 7 and the screw increases design diversity and adaptability, allowing the device to better meet various practical application needs. Finally, as an independent component, the rocker arm mechanism 7's ease of disassembly and replacement not only reduces maintenance costs and time but also improves the device's reliability and service life.

[0053] In a preferred embodiment, the forklift wheel lifting device further includes a locking mechanism 8, which is connected to the screw and the fixed surface 3 respectively, and has a manual opening and closing function; when the locking mechanism 8 is in the open state, the screw and the fixed surface 3 can rotate freely; and when the locking mechanism 8 is in the closed state, it can lock the rotational movement of the screw relative to the fixed surface 3, thereby effectively preventing the wheel mechanism 6 from falling accidentally due to gravity during the lifting process.

[0054] Specifically, in this embodiment, the "locking mechanism 8" refers to a mechanical device designed to restrict or prevent the movement of other components relative to a reference surface under specific conditions. Specifically, the locking mechanism 8 has a manual opening and closing function, meaning that the user can manually switch the state of the locking mechanism 8 to control the rotational movement of the screw.

[0055] In practical applications of forklift wheel lifting devices, especially when lifting operations are completed or when a pause is required, there is a risk that the wheel mechanism 6 may accidentally fall due to gravity, potentially causing equipment damage or safety hazards. To address this issue, it is necessary to design a mechanism that can reliably lock the rotational movement of the screw. Therefore, the introduction of the locking mechanism 8 becomes essential. It aims to provide a safe and reliable locking solution, ensuring that the relative position between the screw and the fixed surface 3 remains fixed when lifting operations are not performed, effectively preventing unintended movement caused by external forces (especially gravity).

[0056] In practical implementation, although the design can vary, the core element is that it must effectively connect with the screw and the fixed surface 3, and have the ability to be manually operated to switch between open and closed states. One possible implementation is that the locking mechanism 8 includes a locking element (e.g., a locking bolt or locking pin), one end of which passes through a pre-set hole on the fixed surface 3, and the other end matches a specific part (e.g., a groove or hole) on the screw. When the locking element is manually tightened or inserted into place, the locking mechanism 8 is in the closed state, at which point the locking element restricts the rotational movement of the screw relative to the fixed surface 3; conversely, when the locking element is manually loosened or pulled out, the locking mechanism 8 is in the open state, allowing the screw to rotate freely between itself and the fixed surface 3. Furthermore, to ensure ease of operation and reliability of the locking function, the user can operate the locking element using hand tools (e.g., wrenches, screwdrivers, etc.). At the same time, the design must fully consider friction and mechanical strength to prevent accidental unlocking due to vibration or external impact.

[0057] The use of locking mechanism 8 gives the forklift wheel lifting device of this embodiment significant technical advantages in several aspects. Firstly, in terms of safety, locking mechanism 8 effectively prevents the wheel mechanism 6 from accidentally falling during the lifting process, significantly reducing the risk of equipment damage and personal injury. Secondly, in terms of operational flexibility, the manual opening and closing design allows users to switch the locking state at any time according to actual needs, providing convenience for flexible use and maintenance of the equipment. Finally, in terms of stability, the robust locking provided by locking mechanism 8 in the closed state ensures the stability of the lifting device in a stationary state, further extending the service life of the equipment.

[0058] In a preferred embodiment, such as Figure 3 As shown, the forklift wheel lifting device further includes: an additional component 9, which is composed of another set of hinge linkage mechanism 1 and fixed surface 3 identical to those in the forklift wheel lifting device; the two fixed surfaces 3, including the additional component 9, are arranged vertically parallel and opposite to each other; the two hinge linkage mechanisms 1 are arranged opposite and parallel to each other in the inner area of ​​the two fixed surfaces 3; and the screw is threadedly connected to the two middle connecting rods 5 of the two hinge linkage mechanisms 1 in a mutually perpendicular manner; the two ends of the screw are fixedly connected to the two fixed surfaces 3 in a rotatable manner; at the same time, the head hinges 4 at one end of the two hinge linkage mechanisms 1 are respectively and firmly installed on the two fixed surfaces 3, while the tail hinges 4 at the other end are fixedly installed on the wheel mechanism 6.

[0059] Specifically, in this embodiment, "additional component 9" refers to a component similar to the main structure of the forklift wheel lifting device, which also consists of a set of hinge linkage mechanisms 1 and fixed surfaces 3. This set of hinge linkage mechanisms 1 maintains structural and functional consistency with the original hinge linkage mechanism 1 in the forklift wheel lifting device, ensuring the symmetry and stability of the device. By arranging the two fixed surfaces 3, including the additional component 9, vertically parallel and opposite each other, the structural expansion and optimization of the device are achieved.

[0060] In the design of the forklift wheel lifting device, the purpose of introducing the additional component 9 is to enhance the lifting capacity and stability of the device. By adding a set of hinge linkage mechanisms 1 and fixed surfaces 3 identical to the original structure, and arranging them vertically parallel and oppositely, the load during the lifting process can be effectively distributed, improving the load-bearing capacity of the device. Simultaneously, the two hinge linkage mechanisms 1 are arranged opposite and parallel to each other in the inner areas of the two fixed surfaces 3, and connected perpendicularly by screws, further enhancing the rigidity and stability of the device. This design enables the forklift wheel lifting device to exhibit superior performance when handling heavy loads or complex lifting tasks.

[0061] In practical implementation, the two fixed surfaces 3 are first set vertically parallel and opposite to each other, ensuring that their spacing and positional relationship meet the design requirements. Then, a set of hinge linkage mechanisms 1 are installed on the inner areas of the two fixed surfaces 3, arranged opposite and parallel to each other. Next, the two ends of the screw are fixedly connected to the two fixed surfaces 3 in a rotatable manner, while ensuring that the screw is threadedly connected to the two opposite middle connecting rods 5 in the two hinge linkage mechanisms 1 in a mutually perpendicular manner. This connection method not only ensures the stability of the screw during the lifting process, but also facilitates the adjustment of the lifting height by rotating the screw. In addition, the head hinges 4 at one end of the two hinge linkage mechanisms 1 are firmly installed on the two fixed surfaces 3, while the tail hinges 4 at the other end are fixedly installed on the wheel mechanism 6, thereby realizing the linkage and coordinated movement of the entire lifting device.

[0062] By introducing additional component 9 and implementing the above-described specific embodiments, the forklift wheel lifting device of this embodiment achieves a significant improvement in technical performance. Firstly, the lifting capacity and load-bearing capacity of the device are significantly enhanced, enabling it to handle heavier and more complex lifting tasks. Secondly, the symmetry and stability of the structure are optimized, ensuring smooth operation and safety during the lifting process. Furthermore, the perpendicular connection between the screw and the hinge linkage mechanism 1 improves the rigidity and precision of the device, making the lifting height more accurate and controllable. In summary, the forklift wheel lifting device of this embodiment exhibits excellent technical performance in terms of lifting capacity, stability, and precision.

[0063] In a preferred embodiment, such as Figure 4 As shown, the fixed surface 3 includes a driven wheel 10, which is disposed in the bottom region of the fixed surface 3 and is capable of free rotation. This driven wheel 10 supports the lifted component after the wheel mechanism 6 completes its lifting action, allowing the component to move under the rolling action of the driven wheel 10. Preferably, the driven wheel 10 includes a universal joint 11, which is disposed at the center of the axle of the driven wheel 10 or at a fixed structure connected to the driven wheel 10. This universal joint allows the driven wheel 10 to freely steer when the forklift wheel lifting device moves.

[0064] Specifically, in this embodiment, the driven wheel 10 is disposed in the bottom area of ​​the fixed surface 3 and can rotate freely. The main function of the driven wheel 10 is to support the lifted component after the wheel mechanism 6 completes the lifting action, and to allow the component to move under the rolling action of the driven wheel 10, thereby increasing the flexibility and practicality of the device. In addition, the driven wheel 10 also contains a "universal mechanism 11", which is located at the center of the wheel axle of the driven wheel 10 or at the fixed structure connected to the driven wheel 10. Its main function is to allow the driven wheel 10 to turn freely when the forklift wheel lifting device moves as a whole, further enhancing the mobility and adaptability of the device.

[0065] In this embodiment, the use of the driven wheel 10 and its universal joint 11 is based on the following considerations. First, the introduction of the driven wheel 10 solves the problem of movement of the lifted component after lifting, allowing the component to be easily transferred within the working area, thus improving work efficiency. Second, the rotational characteristics of the driven wheel 10 effectively reduce frictional resistance during movement, protecting the lifted component from damage. Furthermore, the universal joint 11 allows the driven wheel 10 to turn freely in any direction, which not only enhances the overall mobility of the forklift wheel lifting device but also enables the device to flexibly respond to complex and changing working environments, improving operational flexibility and safety.

[0066] In practical implementation, firstly, ensure that the driven wheel 10 is securely installed in the bottom area of ​​the fixed surface 3, and that its axis of rotation is perpendicular to the fixed surface 3, to ensure that the driven wheel 10 can smoothly support the lifted component. The material and size of the driven wheel 10 need to be reasonably selected according to the weight and size of the lifted component to ensure sufficient support force and smooth rolling. At the same time, the universal joint 11 is precisely installed at the center of the axle of the driven wheel 10 or on the fixed structure connected to the driven wheel 10, ensuring that it can provide stable steering function when the device moves. When the forklift wheel lifting device moves, the operator can push or pull the device to allow the driven wheel 10 to turn freely under the action of the universal joint 11, thereby realizing the flexible movement of the device.

[0067] The forklift wheel lifting device of this embodiment has the following technical advantages: First, the introduction of the driven wheel 10 allows the device to easily move the lifted component after completing the lifting action, greatly improving work efficiency and flexibility. Second, the universal joint 11 allows the driven wheel 10 to turn freely in any direction, enhancing the device's mobility and adaptability, enabling it to flexibly cope with complex and changing working environments. Furthermore, the rotational characteristics of the driven wheel 10 effectively reduce frictional resistance during movement, protecting the lifted component from damage and improving the device's safety and reliability. In summary, the forklift wheel lifting device of this embodiment exhibits excellent technical effects in lifting, moving, and turning, and has high practical value and promising prospects for widespread application.

[0068] In a preferred embodiment, such as Figure 5 As shown, the number of hinges 4 is set to six, and the number of links 5 is five.

[0069] In this embodiment, the number of hinges 4 is set to six, and the number of links 5 is set to five, based on a comprehensive consideration of the device's structural stability and movement flexibility. First, the arrangement of six hinges 4 ensures a more stable connection between the various components during lifting, effectively distributing the lifting force and preventing structural damage caused by excessive force at a single point. Second, the configuration of five links 5 allows the device to form a more complex kinematic chain during lifting and lowering, thereby achieving more precise and stable control. Furthermore, this number setting also takes into account the device's manufacturing cost and lightweight requirements, ensuring that the device maintains high performance while also possessing good economic efficiency and practicality.

[0070] In practical implementation, the positions of the six hinges 4 are first rationally arranged according to the overall dimensions and lifting requirements of the forklift wheel lifting device. These hinges 4 are respectively installed between the fixed part, the lifting part, and the connecting rods 5 of the device to ensure that the device can form a stable support structure during the lifting process. At the same time, the five connecting rods 5 are precisely connected between the hinges 4 to form a continuous kinematic chain. The length and material of the connecting rods 5 need to be rationally selected according to the lifting force and motion requirements to ensure that they can maintain sufficient rigidity and toughness while bearing the lifting force. When the device performs lifting and lowering operations, the six hinges 4 and the five connecting rods 5 work together to form a stable lifting mechanism, realizing the smooth lifting and lowering of the object being lifted.

[0071] The arrangement of the aforementioned number of hinges 4 and connecting rods 5 offers the following technical advantages: First, the arrangement of six hinges 4 significantly enhances the structural stability of the device, enabling it to withstand greater loads during lifting while reducing the risk of failure due to structural deformation. Second, the configuration of five connecting rods 5 makes the device's movement more flexible and stable, allowing for precise control of the lifted object and improving lifting efficiency and safety. Furthermore, this arrangement also allows the device to maintain high performance while possessing good economic and lightweight characteristics, reducing manufacturing costs and transportation difficulties.

[0072] Example 3

[0073] Based on the first embodiment described above, this application also provides another forklift wheel lifting device, such as... Figure 1 As shown, it includes: a hinge linkage mechanism 1, a drive arm 2, and a fixed surface 3; the hinge linkage mechanism 1 includes: at least four hinges 4 and at least three links 5; the number of hinges 4 is even, and the number of links 5 is one less than the number of hinges 4; each hinge 4 is connected to the other one by one through the link 5 to form a non-closed chain structure, and all links 5 can rotate around the point connected to the hinge 4 in the same plane; the head hinge 4 at one end of the hinge linkage mechanism 1 is fixedly installed on the fixed surface 3, and the tail hinge 4 at the other end is fixedly installed on the wheel mechanism 6;

[0074] The drive arm 2 includes a hydraulic rod, hydraulic lines, hydraulic oil, and a manual pump. One end of the hydraulic rod is connected to the fixed surface 3, and the other end is vertically fixed to the center link 5. The manual pump is connected to the hydraulic rod through the hydraulic lines to achieve a sealed connection that allows the transmission of hydraulic oil. It is used to generate hydraulic pressure by manually operating the manual pump to drive the center link 5 to reciprocate linearly along the axial direction of the hydraulic rod.

[0075] Specifically, in this embodiment, the "drive arm 2" is a key component in the forklift wheel lifting device used to generate lifting power. It comprises four main parts: a "hydraulic rod," "hydraulic lines," "hydraulic oil," and a "manual pump." The hydraulic rod, as the direct transmitter of driving force, has one end firmly connected to the fixed surface 3, and the other end vertically fixed to the center link 5, ensuring effective power transmission and structural stability. The hydraulic lines serve as channels for hydraulic oil flow, achieving a sealed connection between the manual pump and the hydraulic rod while allowing hydraulic oil transmission. The hydraulic oil, as the transmission medium, circulates in the hydraulic lines, transmitting the hydraulic pressure generated by the manual pump. The manual pump is the user interface, generating hydraulic pressure through manual operation, thereby driving the center link 5 to reciprocate linearly along the axial direction of the hydraulic rod.

[0076] In this embodiment, a hydraulic drive method was chosen, specifically employing the aforementioned drive arm 2 structure, primarily for the following reasons. First, hydraulic drive offers advantages such as high transmission power, good stability, and ease of control, making it suitable for applications requiring frequent lifting and lowering and bearing large loads. Second, the vertical fixed connection between the hydraulic rod and the central connecting rod 5 ensures direct transmission of lifting force and structural stability, preventing structural deformation or failure due to changes in transmission torque. Furthermore, the manual pump, as a power source, not only provides flexible operation but also allows the entire device to operate normally without a power supply, enhancing its applicability and reliability.

[0077] In practical implementation, firstly, based on the overall dimensions and load-bearing requirements of the forklift wheel lifting device, select appropriate hydraulic rods, hydraulic lines, hydraulic oil, and a manual pump for assembly. One end of the hydraulic rod is connected to the fixed surface 3 via bolts or other fastening methods to ensure its stability; the other end is vertically fixed to the center link 5 via a special connector to ensure effective power transmission. The hydraulic lines are laid according to a predetermined layout and direction, ensuring reliable sealing at the connections with the hydraulic rod and manual pump to prevent hydraulic oil leakage. Then, an appropriate amount of hydraulic oil is injected into the hydraulic lines, and the system is emptied and tested using the manual pump to ensure normal operation. Finally, the user manually operates the manual pump to generate hydraulic pressure, driving the hydraulic rod to extend or retract, thereby causing the center link 5 to reciprocate linearly along the axial direction of the hydraulic rod, realizing the lifting and lowering functions of the forklift wheel lifting device.

[0078] The forklift wheel lifting device of this embodiment has the following technical advantages: First, the hydraulic drive allows for greater and more stable lifting force, enabling it to handle various complex working conditions and load requirements. Second, the vertical fixed connection between the hydraulic rod and the center connecting rod 5 ensures the stability and durability of the structure, extending the service life of the device. Furthermore, the manual pump, as a power source, not only provides flexible operation but also reduces the energy consumption and cost of the device. In summary, the forklift wheel lifting device of this embodiment exhibits excellent technical performance in terms of lifting capacity, stability, operational flexibility, and economy, possessing high practical value and promising prospects for widespread application.

[0079] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this invention. Any equivalent structural or procedural transformations made based on the description and drawings of this invention, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this invention.

Claims

1. A forklift wheel lifting device, characterized in that, include: Hinged linkage mechanism, drive arm and fixed surface; The hinge linkage mechanism includes at least four hinges and at least three links; the number of hinges is even, and the number of links is one less than the number of hinges. Each hinge is connected to the others via a link, forming a non-closed chain structure. All links can rotate around the point connected to the hinge in the same plane. The head hinge at one end of the hinge linkage mechanism is fixedly mounted on the fixed surface, while the tail hinge at the other end is fixedly mounted on the wheel mechanism. One end of the drive arm is connected to the fixed surface, and the drive arm is perpendicular to and connected to the middle link in the hinge linkage mechanism, for driving the middle link to reciprocate linearly along the axial direction of the drive arm.

2. The forklift wheel lifting device as described in claim 1, characterized in that, One end of the drive arm is connected to the fixed surface, and the drive arm is perpendicular to and connected to the middle link in the hinge linkage mechanism, which is used to drive the middle link to perform reciprocating linear motion along the axial direction of the drive arm. Specifically, it includes: The drive arm uses a screw, one end of which is rotatably fixed to the fixed surface. The screw and the center connecting rod are connected by a vertically arranged threaded connection, which is used to drive the center connecting rod to reciprocate linearly along the axial direction of the screw by rotating the screw.

3. The forklift wheel lifting device as described in claim 2, characterized in that, The hinge linkage mechanism includes at least four hinges and at least three links; the number of hinges is even, and the number of links is one less than the number of hinges, specifically including: The number of hinges is set to four, and the number of links is three.

4. A forklift wheel lifting device as described in claim 2, characterized in that, Also includes: A rocker arm mechanism is provided, wherein the rocker arm mechanism is directly connected to the screw or connected via a transmission method, and is used to drive the screw to rotate.

5. A forklift wheel lifting device as described in claim 2, characterized in that, Also includes: A locking mechanism is provided, which is connected to both the screw and the fixed surface and has a manual opening and closing function. When the locking mechanism is in the open state, the screw and the fixed surface can rotate freely. When the locking mechanism is in the closed state, it can lock the rotational movement of the screw relative to the fixed surface, thereby effectively preventing the wheel mechanism from falling unexpectedly due to gravity during the lifting process.

6. A forklift wheel lifting device as described in claim 2, characterized in that, Also includes: An additional component comprises another set of hinge linkage mechanisms and fixed surfaces identical to those in the forklift wheel lifting device. The two fixed surfaces, including the additional component, are vertically parallel and opposite to each other. The two hinge linkage mechanisms are arranged opposite and parallel to each other within the inner regions of the two fixed surfaces. A screw is threadedly connected to two opposing center links in the two hinge linkage mechanisms in a mutually perpendicular manner. Both ends of the screw are rotatably fixed to the two fixed surfaces. Simultaneously, the head hinges at one end of each hinge linkage mechanism are securely mounted on the two fixed surfaces, while the tail hinges at the other end are fixedly mounted on the wheel mechanism.

7. A forklift wheel lifting device as described in claim 1, characterized in that, One end of the drive arm is connected to the fixed surface, and the drive arm is perpendicular to and connected to the middle link in the hinge linkage mechanism, which is used to drive the middle link to perform reciprocating linear motion along the axial direction of the drive arm. Specifically, it includes: The drive arm includes a hydraulic rod, hydraulic lines, hydraulic oil, and a manual pump. One end of the hydraulic rod is connected to the fixed surface, and the other end is vertically fixed to the center connecting rod. The manual pump is connected to the hydraulic rod through the hydraulic lines to achieve a sealed connection that allows the transmission of hydraulic oil. It is used to generate hydraulic pressure by manually operating the manual pump to drive the center connecting rod to reciprocate linearly along the axial direction of the hydraulic rod.

8. The forklift wheel lifting device according to any one of claims 1 to 7, characterized in that, The fixed surface includes a driven wheel, which is disposed in the bottom area of ​​the fixed surface and can rotate freely. It is used to support the lifted component after the wheel mechanism completes the lifting action, and to enable the component to move under the rolling action of the driven wheel.

9. A forklift wheel lifting device as described in claim 8, characterized in that, Driven gears include: The universal joint is located at the center of the axle of the driven wheel or at a fixed structure connected to the driven wheel, and is used to enable the driven wheel to freely turn when the forklift wheel lifting device moves.

10. A forklift wheel lifting device as described in claim 2, characterized in that, The hinge linkage mechanism includes at least four hinges and at least three links; the number of hinges is even, and the number of links is one less than the number of hinges, specifically including: the number of hinges is set to six, and the number of links is five.

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