A handling fork truck and a logistics handling vehicle set

Abstract

The application belongs to the technical field of logistics systems, and particularly relates to a carrying forklift and a logistics carrying vehicle group. The carrying forklift comprises a forklift body, a first lifting mechanism installed on the forklift body, two forklift arms installed on the lifting movable end of the first lifting mechanism, support wheels installed at the bottom of the end of the forklift arm, a support rod hinged at one end to the forklift body and having the other end provided with a roller, the support rod being located between the two adjacent forklift arms, the first telescopic driving device being installed on one side of the support rod, one end of the first telescopic driving device being hinged to the forklift body, and the other end being hinged to the middle part of the support rod. The logistics carrying vehicle group comprises the carrying vehicle, any one of the carrying forklifts and the carrying vehicle which are detachably connected. The application improves the stability of the carrying forklift under heavy load working conditions. Due to the split structure design of the carrying vehicle and the carrying forklift, the logistics carrying vehicle group has the ability of long-distance fast movement and the function of flexible forklift goods, thereby improving the operation efficiency.

Description

Technical Field

[0001] This application relates to the field of logistics system technology, and in particular to a forklift and a logistics handling vehicle assembly. Background Technology

[0002] Traditional forklifts typically feature cantilever beam forks, with the fork root fixed to the mast and the fork tip free for picking up goods. In this design, when carrying loads, the fork root relies primarily on the connection to the mast to withstand bending moments, leaving the fork tip without effective support. In actual operation, when lifting heavy objects, the center of gravity often lies in the front of the fork, posing a risk of forward tilting or even tipping over. This results in poor stability under heavy loads. Furthermore, conventional forklifts operate on a one-stack-per-forklift configuration, limiting their transport capacity, especially for long-distance transport, leading to low efficiency. Summary of the Invention

[0003] This application aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, embodiments of this application provide a forklift and a logistics transport vehicle assembly, preventing the risk of forklift tipping and improving the stability of the forklift under heavy load conditions. Due to the separate structural design of the transport vehicle and the forklift, the logistics transport vehicle assembly possesses both the ability to move long distances quickly and the function of flexibly picking up and placing goods on shelves, thus improving the efficiency and flexibility of logistics operations.

[0004] In a first aspect, this application provides a pallet truck, comprising:

[0005] A forklift body, on which a first lifting mechanism is installed;

[0006] Two fork arms are provided. The two fork arms are installed on the lifting movable end of the first lifting mechanism and are distributed side by side at intervals along the width direction of the forklift body. Support wheels are installed at the bottom of the ends of the fork arms.

[0007] A support rod is hinged at one end to the forklift body and a roller is installed at the other end. The support rod is located between two adjacent fork arms. A first telescopic drive device is installed on one side of the support rod. One end of the first telescopic drive device is hinged to the forklift body and the other end is hinged to the middle of the support rod. The first telescopic drive device drives the support rod to swing up and down by telescopic movement. The end of the support rod with the roller can be lowered to support the middle between the two fork arms.

[0008] According to the forklift provided in the first aspect of this application, the first lifting mechanism includes a first lifting drive device and a lifting slide. The forklift body is provided with two parallel and spaced lifting guide rails. The lifting slide is disposed between the two lifting guide rails and is slidably connected to the lifting guide rails. The first lifting drive device is installed between the two lifting guide rails. The lifting movable end of the first lifting drive device is connected to the lifting slide. The fork arm is connected to the lifting slide.

[0009] According to the forklift provided in the first aspect of this application, the support wheel is mounted on the fork arm via a lifting adjustment mechanism. The lifting adjustment mechanism includes a first rotating bracket, a second rotating bracket, and a second telescopic drive device. The first rotating bracket and the second rotating bracket are distributed opposite to each other along the length direction of the fork arm. One end of the first rotating bracket is hinged to the fork arm to form a hinge end, and the first rotating bracket can rotate around the hinge end. One end of the second rotating bracket is slidably connected to the fork arm to form a sliding end, and the sliding end of the second rotating bracket can reciprocate along the length direction of the fork arm. The other end of the first rotating bracket is hinged to the other end of the second rotating bracket. The support wheel is mounted on the hinge shaft between the first rotating bracket and the second rotating bracket. One end of the second telescopic drive device is hinged to the fork arm, and the other end is hinged to the sliding end of the second rotating bracket.

[0010] According to the forklift provided in the first aspect of this application, both the first rotating bracket and the second rotating bracket are U-shaped structures. The U-shaped open end of the first rotating bracket is hinged to the U-shaped open end of the second rotating bracket. The support wheel includes two rollers and two side plates. The two side plates are distributed in parallel and spaced apart. The two rollers are installed at both ends between the two side plates. The middle part of the side plate is hinged to the hinge axis between the first rotating bracket and the second rotating bracket.

[0011] Secondly, this application provides a logistics handling vehicle assembly, comprising:

[0012] Transport vehicle;

[0013] Any of the above-mentioned forklifts;

[0014] The transport vehicle and the transport forklift are detachably connected.

[0015] According to the logistics handling vehicle assembly provided in the second aspect of this application, a locking block is installed on the outer side of the lifting guide rail, a second lifting mechanism is installed on the handling vehicle, a hook is installed on the lifting movable end of the second lifting mechanism, the hook is used to cooperate with the locking block, and after the hook cooperates with the locking block, the second lifting mechanism drives the handling forklift to lift.

[0016] According to the logistics handling vehicle assembly provided in the second aspect of this application, guide wheels are installed on both sides of the forklift body, guide plates are installed on both sides of the hook, and the ends of the guide plates are arc-shaped structures. The guide plates guide the handling forklift to move until the block and the hook are aligned through the arc-shaped structures.

[0017] According to the logistics handling vehicle group provided in the second aspect of this application, in an optional or preferred embodiment, multiple handling vehicles are provided, each handling vehicle is connected in series, and each handling vehicle is equipped with a handling forklift.

[0018] According to the logistics handling vehicle assembly provided in the second aspect of this application, the handling vehicle includes a frame and wheels, the frame has a U-shaped structure, the wheels are mounted on the bottom of the frame, and the handling forklift is used to enter and exit the handling vehicle from the U-shaped opening end of the frame.

[0019] According to the logistics handling vehicle assembly provided in the second aspect of this application, the wheels are omnidirectional wheels. The axles of two adjacent wheels in the front-rear direction at the bottom of the frame are connected by a first connecting rod. One end of the first connecting rod is hinged to the inner side of the axle of one of the wheels, and the other end is hinged to the outer side of the axle of the other wheel. The axles of two adjacent wheels in the left-right direction at the bottom of the frame are connected by a second connecting rod. Both ends of the second connecting rod are hinged to the same side of the axles of the two adjacent wheels.

[0020] Based on the above technical solution, the embodiments of this application have at least the following beneficial effects: In actual operation, before the fork arm picks up a heavy object, the first telescopic drive device drives the support rod to rotate downwards until the roller supports the ground. With the auxiliary support of the roller, the transport forklift moves forward. After the front half of the fork arm enters the shelf, the first telescopic drive device drives the support rod to rotate upwards and retract. Then the transport forklift continues to move forward until the entire fork arm enters the shelf. At this time, the front end of the fork arm extends from the other end of the shelf and is supported by the roller on the ground. Due to the supporting effect of the support wheel and the roller, this effectively prevents the fork arm from tilting forward during and after the entry phase, preventing the risk of tipping over due to the center of gravity being too far forward, and improving the stability of the transport forklift under heavy load conditions. Attached Figure Description

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments;

[0022] Figure 1 This is a schematic diagram of the fork arm of a pallet truck according to an embodiment of this application being inserted into a cargo rack;

[0023] Figure 2 This is a schematic diagram of the structure of a forklift according to an embodiment of this application;

[0024] Figure 3yes Figure 2 A schematic diagram of the results from another perspective;

[0025] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0026] Figure 5 This is a schematic diagram of the structure of a transport vehicle according to an embodiment of this application;

[0027] Figure 6 yes Figure 5 Another structural diagram from another perspective;

[0028] Figure 7 yes Figure 5 The diagram shows the state of the first and second connecting rods;

[0029] Figure 8 This is a schematic diagram of a transport vehicle assembly according to an embodiment of this application.

[0030] Figure label:

[0031] 100. Forklift body; 200. First lifting mechanism; 300. Fork arm; 400. Support rod; 500. Support wheel; 600. First telescopic drive device; 700. Lifting adjustment mechanism; 800. Transport vehicle; 110. Lifting guide rail; 120. Locking block; 130. Guide wheel; 210. First lifting drive device; 220. Lifting slide; 410. Roller; 510. Small wheel; 520. Side plate; 710. First rotating bracket; 720. Second rotating bracket; 730. Second telescopic drive device; 810. Rectangular frame; 820. Second lifting mechanism; 821. Second lifting drive device; 822. Lifting slider; 830. Hook; 831. Crossbar; 840. Guide plate; 841. Arc structure; 850. Frame; 860. Wheel; 871. First connecting rod; 872. Second connecting rod. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] Traditional forklifts and logistics handling units typically feature cantilever beam structures forks, with the fork base fixed to the mast and the fork tip being a free end used for lifting and loading goods. In this design, when supporting goods, the fork base relies primarily on the connection to the mast to withstand bending moments, lacking effective support at the fork tip. In actual operation, when the fork lifts heavy objects, the center of gravity of the goods often lies in the front of the fork, posing a risk of forward tilting or even tipping over.

[0039] Traditional forklifts and logistics handling units typically use cantilever beam structures for their forks. The fork base is fixedly connected to the mast, while the fork tip is a free end used for lifting goods from the rack. In this structure, when carrying goods, the fork base relies primarily on the connection to the mast to withstand bending moments, with the fork tip lacking effective support. In actual operation, when the fork lifts heavy objects, the center of gravity of the rack is often located in front of the fork, posing a risk of forward tilting or even tipping over. Furthermore, ordinary forklifts operate on a one-pile-per-forklift basis, limiting their transport capacity, especially for long-distance transport, resulting in low efficiency.

[0040] This application provides a forklift and a logistics handling vehicle assembly.

[0041] Reference Figures 1 to 4 The pallet truck includes a forklift body 100, fork arms 300, and support rods 400. A first lifting mechanism 200 is mounted on the forklift body 100. Two fork arms 300 are provided, each mounted on the lifting end of the first lifting mechanism 200, and are arranged side-by-side with intervals along the width of the forklift body 100. Both fork arms 300 extend along the length of the forklift body 100, and their front ends are free ends, used to reach into the bottom of the rack or the gaps between the rack teeth to pick up goods from the rack. A central gap is formed between the two fork arms 300.

[0042] A support wheel 500 is installed at the bottom end of the fork arm 300. The support wheel 500 allows the front end of the fork arm 300 to receive ground support when carrying a load, thus providing effective support and changing the stress state of a traditional cantilever fork arm. When lifting heavy objects, the support wheel 500 can distribute the load on the front end of the fork arm 300, reducing the bending moment at the connection between the fork arm 300 root and the first lifting mechanism 200, and improving the overall structural stability of the forklift when carrying loads.

[0043] One end of the support rod 400 is hinged to the forklift body 100, and the other end of the support rod 400 is equipped with a roller 410. The support rod 400 is located between two adjacent fork arms 300, and a first telescopic drive device 600 is installed on one side of the support rod 400. One end of the first telescopic drive device 600 is hinged to the forklift body 100, and the other end is hinged to the middle of the support rod 400. The first telescopic drive device 600 drives the support rod 400 to swing up and down around its hinge point with the forklift body 100 through its own telescopic movement.

[0044] When the piston rod of the first telescopic drive device 600 extends, it pushes the support rod 400 to swing downwards around the hinge point, allowing the end of the support rod 400 equipped with rollers 410 to descend and support itself at the midpoint between the two fork arms 300. At this time, the rollers 410 are in contact with the ground, providing an additional support point for the midpoint area between the two fork arms 300. When the piston rod of the first telescopic drive device 600 retracts, it pulls the support rod 400 to swing upwards around the hinge point, causing the end of the support rod 400 equipped with rollers 410 to lift upwards and detach from the ground.

[0045] Driven by the first telescopic drive device 600, the support rod 400 can selectively switch between a supported state and a retracted state. This structural design allows the support rod 400 to descend to contact the ground when the forklift is lifting heavy objects, providing effective auxiliary support for the middle of the fork arm 300.

[0046] The auxiliary support of the support rod 400 works in conjunction with the support wheel 500 located at the front end of the fork arm 300 to provide distributed support at the front and middle parts of the fork arm 300 along its length, thereby improving the stress condition of the fork arm 300.

[0047] In actual operation, before the fork arm 300 picks up a heavy object, the first telescopic drive device 600 drives the support rod 400 to rotate downwards until the roller 410 supports it on the ground. With the auxiliary support of the roller 410, the forklift moves forward. After the front half of the fork arm 300 enters the shelf, the first telescopic drive device 600 drives the support rod 400 to rotate upwards and retract. Then the forklift continues to move forward until the entire fork arm 300 enters the shelf. At this time, the front end of the fork arm 300 extends from the other end of the shelf and the roller 410 supports it on the ground. Due to the supporting effect of the support wheel 500 and the roller 410, this effectively prevents the fork arm 300 from tilting forward during and after the entry phase, preventing the risk of tipping over due to the center of gravity being too far forward, and improving the stability of the forklift under heavy load conditions.

[0048] In some examples, the first lifting mechanism 200 includes a first lifting drive device 210 and a lifting slide 220. The forklift body 100 is provided with two parallel, spaced-apart lifting guide rails 110. The two lifting guide rails 110 extend along the height direction of the forklift body 100. The lifting slide 220 is disposed between the two lifting guide rails 110, and both ends of the lifting slide 220 are slidably connected to the lifting guide rails 110. Specifically, sliders are provided on both sides of the lifting slide 220 to cooperate with the lifting guide rails 110, allowing the lifting slide 220 to slide back and forth along the extending direction of the lifting guide rails 110.

[0049] The first lifting drive device 210 is installed between two lifting guide rails 110. The fixed end of the first lifting drive device 210 is connected to the forklift body 100, and the movable lifting end of the first lifting drive device 210 is connected to the lifting slide 220. The fork arm 300 is connected to the lifting slide 220; specifically, the root of the fork arm 300 is fixed to the lifting slide 220 via a connecting plate. The first lifting drive device 210 drives the lifting slide 220 to rise and fall along the lifting guide rails 110, thereby causing the fork arm 300 to rise and fall synchronously.

[0050] In one specific embodiment, the first lifting drive device 210 is an electric cylinder. The cylinder body of the first lifting drive device 210 is connected to the forklift body 100, and the piston rod of the first lifting drive device 210 is connected to the lifting slide 220. The first lifting drive device 210 may include, but is not limited to, linear drive components such as hydraulic cylinders, pneumatic cylinders, or electric push rods. This application does not limit the structure of the first lifting drive device 210, as long as it can ensure the stable lifting and lowering of the lifting slide 220 along the lifting guide rail 110.

[0051] By placing the first lifting drive device 210 between the two lifting guide rails 110, the structure of the entire first lifting mechanism 200 is made more compact. The two lifting guide rails 110 provide precise guidance for the lifting movement of the lifting slide 220, ensuring the smooth movement and positional accuracy of the fork arm 300 during the lifting process, thereby ensuring the stability of the goods rack during the lifting process and reducing the risk of the goods rack falling due to shaking during the transfer process.

[0052] In some examples, the support wheel 500 is mounted on the fork arm 300 via a lifting adjustment mechanism 700. The lifting adjustment mechanism 700 is used to adjust the position of the support wheel 500 relative to the fork arm 300 in the height direction, so that the support wheel 500 can selectively switch between a supported position and a retracted position.

[0053] Specifically, refer to Figure 4 The lifting and adjusting mechanism 700 includes a first rotating bracket 710, a second rotating bracket 720, and a second telescopic drive device 730. The first rotating bracket 710 and the second rotating bracket 720 are distributed opposite each other along the length direction of the fork arm 300. One end of the first rotating bracket 710 is hinged to the fork arm 300, forming a hinge end. The first rotating bracket 710 can rotate about the hinge end. One end of the second rotating bracket 720 is slidably connected to the fork arm 300, forming a sliding end. The sliding end of the second rotating bracket 720 can slide back and forth along the length direction of the fork arm 300. The other end of the first rotating bracket 710 is hinged to the other end of the second rotating bracket 720. A support wheel 500 is mounted on the hinge shaft between the first rotating bracket 710 and the second rotating bracket 720.

[0054] One end of the second telescopic drive device 730 is hinged to the fork arm 300, and the other end of the second telescopic drive device 730 is hinged to the sliding end of the second rotating bracket 720. The second telescopic drive device 730 drives the sliding end of the second rotating bracket 720 to slide along the length direction of the fork arm 300 through its own telescopic movement.

[0055] When the piston rod of the second telescopic drive device 730 extends, it pushes the sliding end of the second rotating bracket 720 to slide closer to the first rotating bracket 710, thereby causing the support wheel 500 on the hinge shaft between the first rotating bracket 710 and the second rotating bracket 720 to extend downward and contact the ground, providing support for the front end of the fork arm 300.

[0056] When the piston rod of the second telescopic drive device 730 retracts, it pulls the sliding end of the second rotating bracket 720 to slide away from the first rotating bracket 710, thereby causing the support wheel 500 on the hinge shaft between the first rotating bracket 710 and the second rotating bracket 720 to move upward, so that the support wheel 500 retracts upward and the bottom of the support wheel 500 is higher than the bottom of the fork arm 300.

[0057] In actual operation, supported by the rollers 410 on the support rod 400, during the initial insertion of the forklift arm 300 into the rack by the forklift, the support wheel 500 is in a retracted position. This avoids interference between the support wheel 500 and the rack during insertion. Once the front portion of the forklift arm 300 is fully inserted (the insertion position will not interfere with the raising and retraction of the support rod 400), the support rod 400 retracts. The forklift then continues to move forward, driving the forklift arm 300 to continue inserting into the rack until the forklift arm 300 is fully inserted and its front end extends out of the rack. At this point, the lifting and adjusting mechanism 700 lowers the support wheel 500 to the ground, providing support. This allows the lifting and adjusting mechanism 700 to adjust the support wheel 500 according to the actual insertion conditions, making it more convenient to use.

[0058] In some examples, both the first rotating bracket 710 and the second rotating bracket 720 are U-shaped structures. The U-shaped open end of the first rotating bracket 710 is opposite to and hinged to the U-shaped open end of the second rotating bracket 720. The support wheel 500 includes two small wheels 510 and two side plates 520. The two side plates 520 are distributed in parallel and spaced apart, and the two small wheels 510 are installed at both ends between the two side plates 520. The middle part of the side plate 520 is hinged to the hinge axis between the first rotating bracket 710 and the second rotating bracket 720.

[0059] The first rotating bracket 710 and the second rotating bracket 720, which adopt a U-shaped structure, provide space for the installation of the support wheel 500, making the overall structure more compact.

[0060] The second telescopic drive device 730 may include, but is not limited to, linear drive components such as hydraulic cylinders, pneumatic cylinders, or electric push rods.

[0061] Reference Figures 5 to 7 This application also provides a logistics handling vehicle assembly, which includes a handling vehicle 800 and any of the aforementioned forklifts. The handling vehicle 800 is detachably connected to the forklift. The handling vehicle 800 is used to carry and move the forklift to enable rapid transfer of the forklift between different work areas. The forklift can be unloaded from the handling vehicle 800 and independently perform rack picking and handling operations. This split-type structural design enables the logistics handling vehicle assembly to have both the ability to move long distances quickly and the ability to flexibly pick up racks, improving the efficiency and flexibility of logistics operations.

[0062] It is understandable that when a forklift needs to be moved a long distance, it can be connected to a pallet truck 800, which will then move it to the target area. Once the target area is reached, the forklift can be unloaded from the pallet truck 800 and allowed to perform independent forklift operations.

[0063] In some examples, the pallet truck 800 includes a frame 850 and wheels 860. The frame 850 has a U-shaped structure. The wheels 860 are mounted on the bottom of the frame 850. The pallet truck is used to enter and exit the pallet truck 800 through the U-shaped opening end of the frame 850.

[0064] In some examples, locking blocks 120 are installed on the outer side of the lifting guide rails 110 on the forklift body 100. Specifically, one locking block 120 is installed on the outer side of each lifting guide rail 110.

[0065] A second lifting mechanism 820 is installed on the pallet truck 800. The movable lifting end of the second lifting mechanism 820 is equipped with a hook 830, which is used to engage with a locking block 120. Specifically, since there are two locking blocks 120, there are also two hooks 830. The two hooks 830 are connected by a crossbar 831, which is connected to the movable lifting end of the second lifting mechanism 820. The second lifting mechanism 820 moves the two hooks 830 up and down by driving the crossbar 831. After the hooks 830 engage with the locking block 120, the second lifting mechanism 820 can drive the pallet truck to move up and down. Specifically, when the pallet truck needs to connect with the pallet truck 800, the pallet truck travels to the designated position of the pallet truck 800, so that the locking block 120 is directly above the hook 830. The second lifting mechanism 820 drives the hook 830 to rise, thereby hooking the locking block 120 and lifting the entire pallet truck, so that the traveling wheels of the pallet truck are off the ground. When the second lifting mechanism 820 drives the hook 830 to fall, the entire pallet truck will be released to the ground.

[0066] In one specific embodiment, a rectangular frame 810 is installed on the transport vehicle 800. The second lifting mechanism 820 includes a second lifting drive device 821 and a lifting slider 822. The second lifting mechanism 820 is disposed inside the rectangular frame 810. Slide rails are provided on both sides inside the rectangular frame 810. The second lifting drive device 821 is installed inside the rectangular frame 810. The two sides of the lifting slider 822 are slidably connected to the slide rails on both sides inside the rectangular frame 810. The lifting slider 822 is installed on the lifting movable end of the second lifting drive device 821. The crossbar 831 is fixedly connected to the lifting slider 822. The second lifting mechanism 820 pushes the lifting slider 822 so that the lifting slider 822 drives the hook 830 on the crossbar 831 to move up and down.

[0067] In some examples, guide wheels 130 are mounted on both sides of the forklift body 100. Correspondingly, guide plates 840 are mounted on both sides of the hook 830. The ends of the guide plates 840 are arc-shaped structures 841. The guide plates 840 guide the forklift's pallet 120 to align with the hook 830 through the arc-shaped structures 841.

[0068] Specifically, when the forklift enters the pallet truck 800, the guide wheels 130 on both sides of the forklift body 100 first contact the arc-shaped structure 841 of the guide plate 840. The arc-shaped structure 841 guides the guide wheels 130, guiding the forklift to automatically adjust its position so that the clamping block 120 can move accurately above the hook 830. This guiding structure design enables the automatic alignment of the clamping block 120 and the hook 830 through the guidance of the guide plate 840, improving docking efficiency.

[0069] Reference Figure 7 In some examples, wheel 860 is a swivel wheel structure. The swivel axles of two adjacent wheels 860 in the front-rear direction at the bottom of the frame 850 are connected by a first connecting rod 871. One end of the first connecting rod 871 is hinged to the inner side of the swivel axle of one of the wheels 860, and the other end of the first connecting rod 871 is hinged to the outer side of the swivel axle of the other wheel 860. The swivel axles of two adjacent wheels 860 in the left-right direction at the bottom of the frame 850 are connected by a second connecting rod 872. Both ends of the second connecting rod 872 are hinged to the same side of the swivel axles of the two adjacent wheels 860.

[0070] One end of the first connecting rod 871 is hinged to the inner side of the omnidirectional axle of one wheel 860, and the other end is hinged to the outer side of the omnidirectional axle of the adjacent wheel 860. This alternating inner and outer hinge allows the two wheels 860 on the left or the two wheels 860 on the right to form opposite turning angles when turning. For example, when the left front wheel 860 turns left, the left rear wheel 860 will turn right, ensuring smooth turning. At the same time, the omnidirectional axles of the two front wheels 860 are connected on the same side through the same second connecting rod 872, and the omnidirectional axles of the two rear wheels 860 are also connected on the same side through the same second connecting rod 872, so that the two front wheels rotate synchronously when they deflect, and the two rear wheels rotate synchronously when they deflect. Therefore, through the arrangement of the first connecting rod 871 and the second connecting rod 872, the multiple wheels 860 at the bottom of the frame 850 can maintain coordination when turning, improving the stability of the transport vehicle 800 during travel and turning.

[0071] Reference Figure 8 In some examples, multiple pallet trucks 800 can be configured. These pallet trucks 800 are connected in series to form a pallet truck group. Each pallet truck 800 contains one forklift. A pallet truck group can carry multiple forklifts simultaneously, transporting them to the work site in one go, significantly improving the transportation efficiency of the logistics pallet truck group.

[0072] Understandably, multiple pallet trucks 800 can be connected by hooks, pins, etc.

[0073] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A pallet truck, characterized in that, include: A forklift body, on which a first lifting mechanism is installed; Two fork arms are provided. The two fork arms are installed on the lifting movable end of the first lifting mechanism and are distributed side by side at intervals along the width direction of the forklift body. Support wheels are installed at the bottom of the ends of the fork arms. A support rod is hinged at one end to the forklift body and a roller is installed at the other end. The support rod is located between two adjacent fork arms. A first telescopic drive device is installed on one side of the support rod. One end of the first telescopic drive device is hinged to the forklift body and the other end is hinged to the middle of the support rod. The first telescopic drive device drives the support rod to swing up and down by telescopic movement. The end of the support rod with the roller can be lowered to support the middle between the two fork arms.

2. The forklift according to claim 1, characterized in that: The first lifting mechanism includes a first lifting drive device and a lifting slide. The forklift body is provided with two parallel and spaced lifting guide rails. The lifting slide is disposed between the two lifting guide rails and is slidably connected to the lifting guide rails. The first lifting drive device is installed between the two lifting guide rails. The lifting movable end of the first lifting drive device is connected to the lifting slide. The fork arm is connected to the lifting slide.

3. The forklift according to claim 1, characterized in that: The support wheel is mounted on the fork arm via a lifting and adjusting mechanism. The lifting and adjusting mechanism includes a first rotating bracket, a second rotating bracket, and a second telescopic drive device. The first rotating bracket and the second rotating bracket are distributed opposite to each other along the length direction of the fork arm. One end of the first rotating bracket is hinged to the fork arm to form a hinge end, and the first rotating bracket can rotate around the hinge end. One end of the second rotating bracket is slidably connected to the fork arm to form a sliding end, and the sliding end of the second rotating bracket can reciprocate along the length direction of the fork arm. The other end of the first rotating bracket is hinged to the other end of the second rotating bracket. The support wheel is mounted on the hinge shaft between the first rotating bracket and the second rotating bracket. One end of the second telescopic drive device is hinged to the fork arm, and the other end is hinged to the sliding end of the second rotating bracket.

4. The forklift according to claim 3, characterized in that: Both the first rotating bracket and the second rotating bracket are U-shaped structures. The U-shaped open end of the first rotating bracket is hinged to the U-shaped open end of the second rotating bracket. The support wheel includes two rollers and two side plates. The two side plates are distributed in parallel and spaced apart. The two rollers are installed at both ends between the two side plates. The middle part of the side plate is hinged to the hinge axis between the first rotating bracket and the second rotating bracket.

5. A logistics handling vehicle assembly, characterized in that, include: Transport vehicle; The forklift described in any one of claims 1 to 4; The transport vehicle and the transport forklift are detachably connected.

6. The logistics handling vehicle assembly according to claim 5, characterized in that: A locking block is installed on the outer side of the lifting guide rail, and a second lifting mechanism is installed on the transport vehicle. A hook is installed on the lifting movable end of the second lifting mechanism. The hook is used to cooperate with the locking block. After the hook cooperates with the locking block, the second lifting mechanism drives the transport forklift to lift.

7. The logistics handling vehicle assembly according to claim 6, characterized in that: Guide wheels are installed on both sides of the forklift body, and guide plates are installed on both sides of the hook. The ends of the guide plates are arc-shaped structures. The guide plates guide the forklift to move until the block and the hook are aligned.

8. The logistics handling vehicle assembly according to claim 5, characterized in that: The transport vehicle includes a frame and wheels. The frame has a U-shaped structure, and the wheels are mounted on the bottom of the frame. The transport forklift is used to enter and exit the transport vehicle from the U-shaped opening end of the frame.

9. The logistics handling vehicle assembly according to claim 8, characterized in that: The wheels are omnidirectional wheels. The axles of two adjacent wheels in the front-rear direction at the bottom of the frame are connected by a first connecting rod. One end of the first connecting rod is hinged to the inner side of the axle of one of the wheels, and the other end is hinged to the outer side of the axle of the other wheel. The axles of two adjacent wheels in the left-right direction at the bottom of the frame are connected by a second connecting rod. Both ends of the second connecting rod are hinged to the same side of the axles of the two adjacent wheels.

10. The logistics handling vehicle assembly according to claim 5, characterized in that: Multiple transport vehicles are provided, and each transport vehicle is connected in series. Each transport vehicle is equipped with a transport forklift.

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