A fork assembly for a handling apparatus

Abstract

The present application provides a kind of carrying equipment's fork assembly, it includes: lifting module, fork unit, connecting rod mechanism, gyro wheel unit, the backboard of the fork unit is equipped with linkage arm, the connecting rod mechanism includes: lifting connecting rod, swing bar, pull rod, the swing bar is equipped with P, N, B angle position end, the first end of the lifting connecting rod is connected with lifting module transmission, the second end is rotatably connected with the P angle position end of swing bar, the first end of the linkage arm and pull rod is rotatably connected with the N, B angle position end of swing bar respectively, to make N angle position end as the fulcrum of rotatable lifting, is lifted / descends and is swung by P angle position end traction, to lift / descend fork unit, and linkage B angle position end is swung with N angle position end as the fulcrum, to make pull rod stretch / contract, the rotatable fulcrum end of the gyro wheel unit is rotatably connected with the fork tooth of fork unit, and the linkage end is rotatably connected with the second end of pull rod, the gyro wheel unit is linked by pull rod, to be collected / dispersed at fork tooth.By this means, gyro wheel unit and fork unit are integrally linked in structure.

Description

Technical Field

[0001] This invention relates to material handling equipment technology, and more particularly to a fork assembly for a material handling equipment. Background Technology

[0002] In the freight industry, forklifts, as a common industrial handling tool, are widely used in various cargo handling scenarios. Generally speaking, a forklift refers to a wheeled handling vehicle that uses its forks to lift palletized goods and transport them to a predetermined location for loading, unloading, and stacking to complete short-distance transportation operations. Therefore, forklifts are one of the most widely used pieces of machinery in the industrial field. Whether in warehouses, factories, or construction sites, a large amount of cargo handling work requires the use of forklifts.

[0003] With the development of forklift technology, in order to improve the load-bearing capacity and stabilize the stability of the forks during transport, traditional forklift equipment usually has a roller structure at the end of the fork teeth. For example, the prior art proposed "A two-wheel drive differential forklift with scissor lift" (patent application number: 202123167155.9), in which the scissor lift structure can drive the two forks to lift, and the bottom of the two forks is connected to the casters through adjustable support members, so as to realize the extension and retraction control of the casters.

[0004] However, this existing technology also has some drawbacks. The fork lifting mechanism and the telescopic mechanism of the fork rollers are two independent transmission systems that need to be controlled separately. If there is a problem with the control system and either mechanism fails to work together, it may cause an operational accident. Therefore, there are still some deficiencies in terms of reliability. Summary of the Invention

[0005] Therefore, the main objective of this invention is to provide a fork assembly for a handling device, so as to realize that the retraction / extension of the roller unit and the lifting / lowering movement of the fork unit are structurally synchronized and integrated.

[0006] To achieve the above objectives, according to a first aspect of the present invention, a fork assembly for a handling device is provided, comprising: a lifting module, a fork unit, a linkage mechanism, and a roller unit, wherein a connecting arm is provided on the back plate of the fork unit, and the linkage mechanism comprises: a lifting link, a swing arm, and a pull rod, wherein the swing arm is provided with P, N, and B corner ends, the first end of the lifting link is drivenly connected to the lifting module, and the second end is rotatably connected to the P corner end of the swing arm, the first ends of the connecting arm and the pull rod are respectively rotatably connected to the N and B corner ends of the swing arm, so that the N corner end serves as a rotatable fulcrum for lifting / lowering and swinging traction of the P corner end to lift / lower the fork unit, and the B corner end is linked to swing with the N corner end as the fulcrum to extend / retract the pull rod, the rotation fulcrum end of the roller unit is rotatably connected to the fork teeth of the fork unit, and the connecting end is rotatably connected to the second end of the pull rod, and the roller unit is linked by the pull rod to retract / extend at the fork teeth.

[0007] In a possible preferred embodiment, it further includes: a synchronization shaft, wherein the swing arms are connected by the synchronization shaft, and the two ends of the synchronization shaft are respectively connected to the P-angle end near each swing arm.

[0008] In a possible preferred embodiment, the fork assembly of the handling equipment further includes: a guide and a guide member, wherein the guide is fixed on the structural frame of the handling equipment, the guide member is connected to the first end of the lifting link, and the guide member is engaged with the guide to constrain the guide member, thereby causing the first end of the lifting link to move along the guiding direction of the guide.

[0009] In a possible preferred embodiment, the connecting arm is provided with a support platform, the guide is located on the lifting / lowering path of the support platform, and when the fork unit is raised to its limit, the support platform abuts against the guide.

[0010] In a possible preferred embodiment, the back plate of the fork unit is further provided with a bracket, the guide is connected to one side of the bracket, the guide is engaged with the guide, so that the guide is constrained by the guide, and the fork unit and the first end of the connecting rod move together along the guide direction of the guide.

[0011] In a possible preferred embodiment, the guided member and the guide member are any one of the guide wheel and roller rail, or the slider and ball rail.

[0012] In a possible preferred embodiment, the fork tooth belly is provided with a linkage groove to accommodate the roller unit. The roller unit includes: a wheel frame and a roller. The wheel frame is provided with M, A, and C corner ends extending in different directions. The C corner end of the wheel frame is rotatably connected to the roller, the M corner end is rotatably connected to the support at the linkage groove of the fork tooth to form a rotation fulcrum, and the A corner end is rotatably connected to the second end of the pull rod to receive the extension / retraction linkage of the pull rod, so that the C corner end swings with the M corner end as the fulcrum to drive the roller to extend / retract from the linkage groove.

[0013] In a possible preferred embodiment, the center line L1 of the swing arm at corner B and N is equidistant from and parallel to the center line L2 of the wheel frame at corner M and A.

[0014] In a possible preferred embodiment, the pull rod is housed in the linkage groove, and there is a height difference between the first and second ends of the pull rod relative to the pull rod body, so that the first and second ends of the pull rod are allowed to swing below the N-angle end of the swing arm and the M-angle end of the wheel frame, respectively, during transmission.

[0015] In a possible preferred embodiment, the fork tooth is provided with a skylight at the roller unit storage position, and when the roller unit is stored in the linkage groove, at least part of the roller body extends out of the skylight beyond the fork tooth.

[0016] The fork assembly of the handling equipment provided by this invention cleverly designs a linkage structure between the lifting module, fork unit, linkage mechanism, and roller unit. This achieves integrated operation of the roller unit's retraction / extension and the fork unit's lifting / lowering, ensuring the synergy of each linkage unit and offering superior reliability compared to control schemes with multiple independent mechanisms. Furthermore, with this design, when the fork unit is not lifted, the roller unit is in a retracted state, allowing the fork tines to be suspended when entering a grid-shaped pallet. Once the fork tines are in position, lifting and adjusting the fork unit allows the roller unit to extend and land in an integrated manner, thus preventing impact between the fork tines and rollers and the grid-shaped pallet during loading / unloading operations. Therefore, it is particularly suitable for grid-shaped pallets. In addition, after the fork unit lifts the pallet, the roller unit's landing provides load-bearing support for the fork tines, further enhancing the stability of freight operations. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the fork assembly of the handling equipment of the present invention;

[0019] Figure 2This is a partial perspective structural diagram of the fork assembly of the handling equipment of the present invention, wherein one side of the fork teeth is in perspective view;

[0020] Figure 3 This is a schematic diagram of the bottom structure of the fork assembly of the handling equipment of the present invention;

[0021] Figure 4 This is a schematic diagram of the overall linkage structure of the fork assembly of the handling device of the present invention when the roller unit is in the extended state, wherein one side of the fork tooth is in a perspective view;

[0022] Figure 5 This is a side view of the linkage mechanism in the fork assembly of the handling device of the present invention, with the roller unit in the stored state and the fork unit in the initial position, wherein one side of the fork tooth is in perspective.

[0023] Figure 6 This is a schematic diagram of the linkage mechanism transmission trajectory when the roller unit is in the retracted state and the fork unit is in the initial position in the fork assembly of the handling equipment of the present invention.

[0024] Figure 7 This is a side view of the linkage mechanism in the fork assembly of the handling device of the present invention, with the roller unit in the extended state and the fork unit in the raised position, wherein one side of the fork tooth is in perspective view.

[0025] Figure 8 This is a schematic diagram of the linkage mechanism transmission trajectory when the roller unit is in the extended state and the fork unit is in the raised position in the fork assembly of the handling equipment of the present invention;

[0026] Figures 9 to 10 This is a schematic diagram of the transmission trajectory of the linkage mechanism connecting the roller unit and the fork unit in the fork assembly of the handling equipment of the present invention, when the guide mechanism is included;

[0027] Figure 11 This is a schematic diagram of the overall linkage structure of the fork assembly of the handling equipment of the present invention when the roller unit is in the retracted state, including the guide mechanism.

[0028] Figure 12 This is a schematic diagram of the overall linkage structure of the roller unit in the deployed state when the fork assembly of the handling equipment of the present invention includes a guide mechanism.

[0029] Figures 13 to 14 This is a schematic diagram of the overall linkage structure of the fork assembly of the handling equipment of the present invention when the fork unit is in the lifting / lowering state, including the guide mechanism; the back plate is in a perspective view.

[0030] Figures 15 to 16This is a schematic diagram showing how the fork unit and the roller unit can smoothly insert and remove the pallet when the fork assembly of the handling equipment of the present invention is loaded with a grid-shaped pallet, according to the linkage mechanism.

[0031] Figure 17 This is a schematic diagram showing that after the fork assembly of the handling equipment of the present invention is loaded with a grid-shaped pallet, the roller unit extends from the bottom of the grid-shaped pallet and touches the ground according to the linkage mechanism.

[0032] Explanation of reference numerals in the attached figures

[0033] Lifting module 1, fork unit 2, linkage mechanism 3, roller unit 4, guide wheel 5, roller slide rail 6, grid-shaped pallet 7, structural frame 8, back plate 21, fork teeth 22, linkage arm 23, lifting linkage 31, swing arm 32, pull rod 33, P corner end P, N corner end N, B corner end B, wheel frame 41, roller 42, M corner end M, A corner end A, C corner end C, bracket 211, linkage groove 221, skylight 222, synchronous shaft 321, bearing platform 231. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of the present invention, the specific technical solutions of the present invention will be clearly and completely described below in conjunction with embodiments, so as to help those skilled in the art further understand the present invention. Obviously, the embodiments described in this application are merely some embodiments of the present invention, and not all embodiments. It should be noted that, for those skilled in the art, the embodiments and features in the embodiments of this application can be combined with each other without departing from the concept of the present invention and without conflict. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of disclosure and protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0037] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "lay out," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances and in conjunction with existing technology. Furthermore, unless otherwise specified, the embodiments and features in the embodiments of this invention can be combined with each other. One or more of the components shown in the figures may be necessary or not, and the relative positional relationships between the components shown in the figures can be adjusted according to actual needs.

[0039] Please see Figures 1 to 8As shown, in order to achieve structural integration and linkage between the roller unit 4 and the fork unit 2, the present invention provides a fork assembly for a handling device, which includes: a lifting module 1, a fork unit 2, a linkage mechanism 3, and a roller unit 4. The fork unit 2 includes: a back plate 21 and fork teeth 22. The fork teeth 22 extend from the loading surface of the back plate 21 and are arranged in pairs at intervals. A linkage arm 23 is provided on the back side of the back plate 21. The fulcrum end of the roller unit 4 is connected to the fork teeth 22, and its transmission end is connected to the first transmission end of the linkage mechanism 3. The second transmission end of the linkage mechanism 3 is connected to the back plate 21. The connecting arm 23 on plate 21 is connected, while the lifting module 1 is connected to the third transmission end of the linkage mechanism 3. In this example, the lifting module 1 is a lifting hydraulic / oil cylinder. By controlling the lifting / lowering movement of the lifting module 1 through the linkage mechanism 3, the roller unit 4 can be simultaneously driven to retract / extend, and the fork unit 2 can be driven to lift / lower. This makes the roller unit 4 and the fork unit 2 move synchronously and in a unified manner, ensuring the coordination of each linkage unit. The linkage rhythm is controllable, and there will be no interference between mechanisms or conflict in the execution program. The reliability and stability are extremely high.

[0040] Specifically, to achieve the linkage effect of the aforementioned linkage mechanism 3, the lifting / lowering motion of the lifting module 1 is actually converted into different motion directions through the linkage mechanism 3. Therefore, as Figures 1 to 4 As shown, in this example, the linkage mechanism 3 preferably includes: a lifting linkage 31, a swing rod 32, and a pull rod 33. The swing rod 32 is provided with P, N, and B corner ends extending in three different directions to form a triangular vertex distribution. The first end of the lifting linkage 31 (i.e., the third transmission end of the linkage mechanism 3) is connected to the lifting end of the lifting module 1, and the second end is rotatably connected to the P corner end of the swing rod 32. In this example, each rotatable connection can be understood as a pivot connection. The first end of the connecting arm 23 is rotatably connected to the N corner end of the swing rod 32 (i.e., the second transmission end of the linkage mechanism 3), and the first end of the pull rod 33 is rotatably connected to the B corner end of the swing rod 32.

[0041] This design cleverly utilizes the N-angle end of the rocker arm 32 as a fulcrum for lifting, lowering, and rotating. When the rocker arm 32 is raised / lowered by the lifting module 1 connected to the P-angle end, the N-angle end will also rise / lower synchronously, thus creating conditions for the lifting / lowering of the fork unit 2. Furthermore, as... Figures 9 to 10 As shown, the P-angle end of the swing arm 32 will also swing with the N-angle end as the fulcrum, that is, swing between the P1 and P2 positions. Through this transmission and traction, on the one hand, the fork unit 2 connected to the N-angle end can be raised / lowered to drive its lifting / lowering. At the same time, it can also drive the B-angle end to swing with the N-angle end as the fulcrum between the B1 and B2 positions, thereby driving the pull rod 33 to extend / retract, thus providing the transmission conditions for driving the roller unit 4.

[0042] Furthermore, such as Figures 2 to 8 As shown, in order to enable the roller unit 4 to move synchronously with the fork unit 2 and retract / extend at the fork tooth 22, this example provides an example solution in which the roller unit 4 is hidden inside the fork tooth 22 so that the fork tooth 22 can stably support the pallet. The fork tooth 22 has a linkage groove 221 on its belly to at least partially accommodate the roller unit 4 and the pull rod 33. The roller unit 4 includes a wheel frame 41 and a roller 42. The wheel frame 41 has M, A, and C corner ends extending in three different directions to form a triangular vertex distribution.

[0043] The C-corner end of the wheel frame 41 is fork-shaped and rotatably connected to the roller 42. In optional examples, the roller 42 can be a roller assembly or a single wheel structure. The M-corner end of the wheel frame 41 is rotatably connected to the support at the linkage groove 221 of the fork tooth 22, forming a rotation fulcrum. Figure 8 As shown, the A-corner end of the wheel frame 41 is rotatably connected to the second end of the pull rod 33 (i.e., the first transmission end of the linkage mechanism 3), and receives the extension / retraction linkage of the pull rod 33, so that the second end of the pull rod 33 can swing between the A1 and A2 position points, and then the linkage causes the C-corner end to swing between the C2 and C1 position points with the M-corner end as the fulcrum, so as to drive the roller 42 to extend / retract from the linkage groove 221.

[0044] One noteworthy point is that, to prevent the lever 33 from being interfered with during operation, while simultaneously allowing the wheel carrier 41 to perform large-scale swinging movements within the narrow linkage groove 221 of the fork tooth 22, such as... Figure 6 , Figure 8 As shown, the pull rod 33 is housed within the linkage slot 221. The first and second ends of the pull rod 33 have an arc-shaped drop relative to the rod body, allowing the first end of the pull rod 33 to swing in an arc below the N-angle end of the swing arm 32 (swinging between positions B1 and B2) during transmission, and the second end of the pull rod 33 to swing in an arc below the M-angle end of the wheel frame 41 (swinging between positions A1 and A2). Furthermore, to ensure the synchronization and consistency of the fork unit 2 and the roller unit 4 during linkage, the linkage mechanism 3 preferably has the center lines L1 of the B and N-angle ends of the swing arm 32 and L2 of the M and A-angle ends of the wheel frame 41 equidistant and parallel.

[0045] With this design, the linkage mechanism 3 can form a swing extension / retraction linkage between the pull rod 33, the wheel frame 41, and the swing rod 32 in a narrow space. With a small swing, the pull rod 33 extends / retracts, which in turn causes the wheel frame 41 to swing significantly. This allows the linkage roller unit 4 to retract / extend at the linkage groove 221 of the fork tooth 22. At the same time, thanks to the floating shape of the pull rod 33, the pull rod 33 can be hidden in a smaller space on the belly of the fork tooth 22. This greatly reduces the space requirements for the linkage groove 221 on the belly of the fork tooth 22, saving costs. Furthermore, as long as the position of the hidden roller unit 4 at the front of the fork tooth 22 is controlled through the tray, the belly of the fork tooth 22 will not be obstructed, leaving sufficient adjustment space for the fork tooth 22 to extend into the tray.

[0046] In addition, in order to further improve the linkage synchronization consistency and transmission structure reliability of the linkage mechanism 3, in an optional example, the rocker arms 32 are connected to each other via a synchronous shaft 321 to form synchronization. In a preferred example, the two ends of the synchronous shaft 321 are respectively connected to the P-corner end near each rocker arm 32.

[0047] Furthermore, in order to enhance the stability of the transmission structure between the linkage mechanism 3 and the fork unit 2, such as... Figures 9 to 14 As shown, in an optional example, the fork assembly of the handling equipment further includes a guiding mechanism, wherein the guiding mechanism includes a guide member and a guided member. In this example, the guided member and the guide member are illustrated by the guide wheel 5 and the roller rail 6. Of course, those skilled in the art can also use other equivalent alternative methods to implement it, such as using a slider and ball rail scheme. Therefore, other alternative guiding mechanism implementations made without departing from the concept of the present invention are all within the scope of the disclosure of the present invention.

[0048] Among them, such as Figures 11 to 14 As shown, the roller slide rail 6 can be fixed on the handling equipment, which is the handling equipment on which the fork assembly of the present invention can be installed. In the example, the roller slide rail 6 can be connected to the structural frame 8 on the handling equipment, and the guide wheel 5 is connected to the first end of the lifting link 31. The guide wheel 5 is engaged with the roller slide rail 6, so that the guide wheel 5 is constrained by the roller slide rail 6, thereby causing the first end of the lifting link 31 to move along the guiding direction of the guide member, so as to ensure that the movement trajectory during linkage will not deviate, thereby enhancing the structural stability of the transmission mechanism.

[0049] Furthermore, to prevent the linkage mechanism 3 from exceeding its limit during transmission, which could lead to structural collapse or damage, in optional embodiments, such as... Figures 13 to 14 As shown, the connecting boom 23 is also provided with a support platform 231, and the position of the roller slide rail 6 on the structural frame is located on the lifting / lowering path of the support platform 231. When the fork unit 2 is raised to the limit, the support platform 231 abuts against the roller slide rail 6.

[0050] Specifically, since the position of the roller slide rail 6 on the structural frame is fixed, by pre-setting the track length of the roller slide rail 6, it is ensured that the guide wheel 5 at the first end of the lifting linkage 31 will not displace from the track at the positions S2 to S1 during the lifting process. At the same time, a preset lifting limit distance is left between the support platform 231 and the bottom of the roller slide rail 6. In this way, the roller slide rail 6 can be used as a safety limit to achieve both guiding and limiting functions, avoid over-limit transmission, and improve the reliability of the mechanism transmission.

[0051] Furthermore, to better guide the lifting trajectory of the fork unit 2 and enhance the stability of the transmission structure between the linkage mechanism 3 and the fork unit 2, in optional examples, such as... Figures 13 to 14 As shown, the back plate 21 of the fork unit 2 is also provided with a bracket 211. The guide wheel 5 is connected to one side of the bracket 211. The guide is a double-sided roller slide rail or a pair of roller slide rails 6 connected back to back. The guide wheel 5 on the first end of the bracket 211 and the lifting linkage 31 are respectively connected to the slide rails on both sides of the double-sided roller slide rail, so that each guide wheel 5 is constrained by the double-sided roller slide rail, so that the fork unit 2 and the first end of the linkage move together along the guiding direction of the double-sided roller slide rail.

[0052] Furthermore, since the top surface of the fork tines 22 generates surface friction when picking up the pallet, thus creating resistance, in order to cleverly utilize the retractable / extendable characteristics of the roller unit 4, such as... Figures 1 to 14 As shown, in an optional example, the fork tines 22 are provided with a skylight 222 at the location where the roller unit 4 is housed. By setting the roller diameter, when the roller unit 4 is housed in the linkage slot 221, at least a portion of the roller 42 can extend beyond the skylight 222. Therefore, when the fork tines 22 pick up the pallet through the skylight 222, they will drive the roller 42 to rotate, thereby reducing the surface friction resistance between the fork tines 22 and the pallet, which facilitates the smooth insertion of the fork tines 22 into the pallet.

[0053] In summary, the fork assembly of the handling equipment provided by this invention cleverly designs the linkage structure of the lifting module 1, fork unit 2, linkage mechanism 3, and roller unit 4. This achieves integrated linkage between roller unit 4 and fork unit 2 within a compact space, ensuring the synergy of each linkage unit and providing higher reliability than control schemes involving multiple independent mechanisms. Furthermore, as... Figures 15 to 17As shown, with this design, when the fork unit 2 is not raised, the roller unit 4 is in a retracted state. This allows the fork tines 22 to be suspended in the air when entering the grid-shaped pallet 7. Once the fork tines 22 are in position, raising and adjusting the fork unit 2 will cause the roller unit 4 to extend and land simultaneously. This prevents the fork tines 22 and rollers from impacting the grid-shaped pallet 7 during loading / unloading operations, making it particularly suitable for grid-shaped pallets. Furthermore, after the fork unit 2 raises the pallet, the roller unit 4 landing also provides load-bearing support for the fork tines 22, further improving the stability of freight operations.

[0054] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A fork assembly for a material handling device, comprising: The system comprises a lifting module, a fork unit, a linkage mechanism, a roller unit, a guide, and a receiving component. The fork unit has a connecting arm on its back plate. The linkage mechanism includes a lifting link, a swing arm, and a pull rod. The swing arm has P, N, and B angle ends. The first end of the lifting link is connected to the lifting module via transmission, and the second end is rotatably connected to the P angle end of the swing arm. The first ends of the connecting arm and the pull rod are respectively rotatably connected to the N and B angle ends of the swing arm, so that the N angle end serves as a fulcrum for lifting and rotation. The fork unit is raised / lowered and swayed by the P angle end, and the B angle end is linked to the N angle... The lever arm swings around the pivot point to extend / retract the pull rod. The pivot point of the roller unit is rotatably connected to the fork teeth of the fork unit, and the connecting end is rotatably connected to the second end of the pull rod. The guide is fixed on the structural frame of the handling equipment, and the guided member is connected to the first end of the lifting link. The guided member and the guide are engaged, so that the guided member is constrained by the guide, causing the first end of the lifting link to move along the guiding direction of the guide. The connecting arm is provided with a support platform. The position of the guide on the structural frame is located on the lifting path of the support platform, and when the fork unit is raised to its limit, the support platform and the guide are abutted.

2. The fork assembly of the handling equipment according to claim 1, further comprising: The synchronizing shaft connects the swing arms, and the two ends of the synchronizing shaft are respectively connected to the P-angle end near each swing arm.

3. The fork assembly of the handling equipment according to claim 1, wherein the back plate of the fork unit is further provided with a bracket, the guide member is connected to one side of the bracket, the guide member is engaged with the guide member, so that the guide member is constrained by the guide member, so that the fork unit and the first end of the connecting rod move together along the guide member's guiding direction.

4. The fork assembly of the handling equipment according to claim 3, wherein the guide and guide are any one of guide wheels and roller rails, and sliders and ball rails.

5. The fork assembly of the handling equipment according to claim 1, wherein the fork teeth have a linkage groove for receiving a roller unit, the roller unit comprising: The wheel frame and rollers are provided, wherein the wheel frame is provided with M, A and C corner ends extending in different directions, wherein the C corner end of the wheel frame is rotatably connected to the roller, the M corner end is rotatably connected to the support at the fork tooth linkage groove to form a rotation fulcrum, and the A corner end is rotatably connected to the second end of the pull rod to receive the extension / retraction linkage of the pull rod, so that the C corner end swings with the M corner end as the fulcrum, thereby driving the roller to extend / retract from the linkage groove.

6. The fork assembly of the handling equipment according to claim 5, wherein the center line L1 of the swing arm B and N corner ends is equidistant from and parallel to the center line L2 of the wheel frame M and A corner ends.

7. The fork assembly of the handling equipment according to any one of claims 4 or 5, wherein the pull rod is housed in the linkage groove, and the first and second ends of the pull rod have a height difference relative to the pull rod body, so as to allow the first and second ends of the pull rod to swing below the N-angle end of the swing arm and the M-angle end of the wheel carrier, respectively, during transmission.

8. The fork assembly of the handling equipment according to any one of claims 4 or 5, wherein the fork teeth are provided with a skylight at the roller unit storage position, and when the roller unit is stored in the linkage groove, at least a portion of the roller body extends out of the skylight beyond the fork teeth.

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