Fork plate structure and pallet fork

Abstract

The invention provides a fork plate structure and a pallet fork, and relates to the technical field of automatic material warehousing, the fork plate structure comprises a first telescopic part and a second telescopic part which are arranged in a spaced mode, and the first telescopic part and the second telescopic part are arranged in a telescopic mode; the first hooking component is arranged on the first telescopic component, the second hooking component is arranged on the second telescopic component, the first hooking component extends in the direction close to the second telescopic component, the second hooking component extends in the direction close to the first telescopic component, and the hooking assembly is used for hooking the material box; the driving assembly comprises a first driving part and a second driving part, and the first driving part is used for driving the hooking assembly to stretch out and draw back in the first preset direction; the second driving part is used for driving the hooking assembly to move in the second preset direction. According to the fork plate structure, the technical problems that the extension length of a fork needs to be lengthened when a large material box is carried and the manufacturing cost is too high due to the fact that a high-strength material is adopted in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automated material warehousing, and in particular to a fork plate structure and a cargo fork. Background Art

[0002] Currently, with rising land and labor costs, multi-layer shuttles are gaining widespread adoption in a growing number of industries for densely stored, lightly loaded containers. However, the length of each fork plate on current pick-up forks is uniform. For larger materials, such as pallets exceeding 1m in depth, the conventional approach is to lengthen the entire fork, extending the fork beyond the container depth. This results in a longer inner fork plate and, when fully extended, greater deflection. To reduce this deflection, the entire fork needs to be strengthened, increasing its weight and the power of the travel and extension motors, raising the overall vehicle manufacturing cost.

[0003] Therefore, the prior art needs to be further developed. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above technical deficiencies and provide a fork plate structure and a fork to solve the technical problems in the related art of extending the extension length of the fork when transporting large material boxes and using high-strength materials resulting in excessively high manufacturing costs.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: a fork plate structure and a fork are provided, including: a telescopic assembly, the telescopic assembly includes a first telescopic part and a second telescopic part arranged at intervals, and the first telescopic part and the second telescopic part are telescopically arranged; a hook assembly, the hook assembly includes a first hook part arranged on the first telescopic part and a second hook part arranged on the second telescopic part, the first hook part extends in a direction close to the second telescopic part, and the second hook part extends in a direction close to the first telescopic part, and the hook assembly is used to hook the material box; a drive assembly, the drive assembly includes a first drive part and a second drive part, the first drive part is used to drive the hook assembly to extend and retract along a first preset direction; the second drive part is used to drive the hook assembly to move along a second preset direction.

[0006] Furthermore, the first telescopic component includes a first outer fork, a first middle fork and a first inner fork, the first outer fork and the first middle fork are relatively movably arranged, the first middle fork and the first inner fork are relatively movably arranged, and a first hooking component is provided on the side of the first inner fork close to the second telescopic component; the second telescopic component includes a second outer fork, a second middle fork and a second inner fork, the second outer fork and the second middle fork are relatively movably arranged, the second middle fork and the second inner fork are relatively movably arranged, and a second hooking component is provided on the side of the second inner fork close to the first telescopic component, and the second hooking component is provided corresponding to the first hooking component.

[0007] Furthermore, the length of the first inner fork is smaller than the length of the first outer fork; the length of the second inner fork is smaller than the length of the second outer fork.

[0008] Furthermore, a first slide rail is provided on a side of the first outer fork close to the first middle fork, and a first slider is provided on a side of the first middle fork close to the first outer fork. The first slider is movably provided in the first slide rail.

[0009] Furthermore, a first transmission assembly is provided between the first middle fork and the first inner fork. The first transmission assembly and the first middle fork are movably provided relative to each other, and the first transmission assembly and the first inner fork are movably provided relative to each other.

[0010] Furthermore, the first driving component includes: a first driving wheel, the first driving wheel is used to drive the first telescopic component to extend or shorten along the first preset direction; a first driven wheel, the first driven wheel is used to drive the second telescopic component to extend or shorten along the first preset direction; a first driving motor, the first driving motor is used to drive the first driving wheel to rotate; a first transmission shaft, one end of the first transmission shaft is connected to the first driving wheel, and the other end of the first transmission shaft is connected to the first driven wheel.

[0011] Furthermore, the second driving component includes: a second driving wheel and a second driven wheel, the second driving wheel is used to drive the second driven wheel to rotate, and the second driven wheel is used to drive the first telescopic component and the second telescopic component to move along the second preset direction; a second driving motor, the second driving motor is used to drive the second driving wheel to rotate; and a synchronous belt, the synchronous belt is used to connect the second driving wheel and the second driven wheel.

[0012] Furthermore, the second driving component also includes a tensioning device, which is used to tighten the synchronous belt.

[0013] Furthermore, the first hooking component includes at least two hooking blocks, and the at least two hooking blocks are arranged at intervals.

[0014] A cargo fork is also provided, comprising a vehicle body and a fork plate structure; the vehicle body and the hook assembly are movably arranged relative to each other.

[0015] Beneficial effects: 1. The cargo fork of the present invention adopts multiple fork plates of unequal lengths to form a telescopic assembly, wherein the plate body of the inner fork is shorter and can be extended to a distance greater than the length of the inner fork itself. At the same time, a hook assembly is provided to hook the material box. When transporting large and heavy material boxes, there is no need to extend the edge of the inner fork plate for a long distance to hook the edge of the material box. Instead, the hook assembly is driven by the extension of the inner fork plate to hook the middle position of the material box. In this way, the deflection of the inner fork after extension is relatively reduced, and there is no need to use high-strength materials to make the fork plate. At the same time, the structure of the hook assembly is compact and flexible, and the cost is low, which not only reduces the weight of the fork plate structure, but also reduces the manufacturing cost of the entire vehicle, and solves the technical problems in the related art of needing to lengthen the extension length of the cargo fork when transporting large material boxes and using high-strength materials resulting in excessively high manufacturing costs.

[0016] 2. The present invention utilizes the synchronous belt drive in the second drive structure to realize the clamping or releasing action of the first telescopic component and the second telescopic component along the width direction of the material box, and utilizes the hooking assembly to hook the material, thereby solving the technical problems of power supply and communication difficulties of the ordinary fork hooking motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 2 is a schematic structural diagram of a fork plate structure used in an embodiment of the present invention; Figure 2 Schematic diagram of the structure of the telescopic assembly of the fork plate structure used in an embodiment of the present invention; Figure 3 yes Figure 1 A partial enlarged schematic diagram of part A; Figure 4 1 is a schematic structural diagram of a driving assembly of a fork plate structure adopted in an embodiment of the present invention; Figure 5 yes Figure 4 A partial enlarged schematic diagram of part B; Figure 6 2 is a schematic structural diagram of a first driving component of a fork plate structure used in an embodiment of the present invention; Figure 7 Schematic diagram of the structure of a synchronous belt with a fork plate structure adopted in an embodiment of the present invention; Figure 8 2 is a schematic structural diagram of a first driving component of a fork plate structure adopted in an embodiment of the present invention.

[0018] The above drawings include the following reference numerals: 1. Telescopic assembly; 11. First telescopic component; 111. First outer fork; 1111. First slide rail; 112. First middle fork; 1121. First slider; 1122. First transmission assembly; 113. First inner fork; 12. Second telescopic component; 121. Second outer fork; 122. Second middle fork; 123. Second inner fork; 2. Hooking assembly; 21. First hooking component; 211. Hooking block; 22. Second hooking component; 3. Driving assembly; 31. First driving component; 311. First driving wheel; 312. First driven wheel; 313. First driving motor; 314. First transmission shaft; 32. Second driving component; 321. Second driving wheel; 322. Second driven wheel; 323. Second driving motor; 324. Synchronous belt; 325. Tensioning device. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0020] According to an embodiment of the present invention, a fork plate structure is provided. Figures 1 to 8 , including: a telescopic component 1, the telescopic component 1 includes a first telescopic part 11 and a second telescopic part 12 arranged at intervals, and the first telescopic part 11 and the second telescopic part 12 are telescopically arranged; a hook component 2, the hook component 2 includes a first hook component 21 arranged on the first telescopic part 11 and a second hook component 22 arranged on the second telescopic part 12, the first hook component 21 extends in a direction close to the second telescopic part 12, and the second hook component 22 extends in a direction close to the first telescopic part 11, and the hook component 2 is used to hook the material box; a driving component 3, the driving component 3 includes a first driving component 31 and a second driving component 32, the first driving component 31 is used to drive the hook component 2 to extend and retract along a first preset direction; the second driving component 32 is used to drive the hook component 2 to move along a second preset direction.

[0021] Specifically, the fork plate structure of this embodiment drives the hook component 2 to move to the material box position through the extension and contraction of the telescopic component 1, thereby realizing the function of picking up and placing materials, wherein the hook component 2 consists of two directions of movement, namely, the fork extension and retraction movement along the first preset direction (i.e., the material depth direction), and the toward and away movement of the first telescopic component 11 and the second telescopic component 12 along the second preset direction (material width direction).

[0022] In this way, the fork plate structure hooks the material box by arranging a hook component on the telescopic component 1. When transporting large and heavy material boxes, there is no need to extend the edge of the inner fork plate for a long distance to hook the edge of the material box. Instead, the telescopic component 1 is extended to drive the hook component 2 to hook the middle position of the material box. In this way, the deflection of the telescopic component 1 after extension is relatively reduced, and there is no need to use high-strength materials to make the fork plate. At the same time, the structure of the hook component 2 is compact and flexible, and the cost is low, which not only reduces the weight of the fork plate structure, but also reduces the manufacturing cost of the entire vehicle, and solves the technical problems in the related technology that the extension length of the fork needs to be lengthened when transporting large material boxes and the use of high-strength materials leads to excessively high manufacturing costs.

[0023] In the fork plate structure of this embodiment, the first telescopic component 11 includes a first outer fork 111, a first middle fork 112 and a first inner fork 113. The first outer fork 111 and the first middle fork 112 are relatively movably arranged, the first middle fork 112 and the first inner fork 113 are relatively movably arranged, and the first inner fork 113 is close to the second telescopic component 12. A first hooking component 21 is provided on the side of the first inner fork 113; the second telescopic component 12 includes a second outer fork 121, a second middle fork 122 and a second inner fork 123. The second outer fork 121 and the second middle fork 122 are relatively movably arranged, the second middle fork 122 and the second inner fork 123 are relatively movably arranged, and a second hooking component 22 is provided on the side of the second inner fork 123 close to the first telescopic component 11, and the second hooking component 22 is provided corresponding to the first hooking component 21.

[0024] Specifically, the first telescopic part 11 and the second telescopic part 12 are both three-stage forks, and the length of the inner fork assembly (i.e., the first inner fork 113 and the second inner fork 123) is smaller than the fork body length of the first outer fork 111 and the second outer fork 121. The inner sides of the first inner fork 113 and the second inner fork 123 are both installed with hook blocks (i.e., the first hook component 21 and the second hook component 22). In this way, when the first telescopic part 11 and the second telescopic part 12 are extended, they can drive the first hook component 21 and the second hook component 22 to extend, so that the first hook component 21 and the second hook component 22 can extend to the hooking point of the material.

[0025] Preferably, the first hooking component 21 is disposed at a middle position of the first inner fork 113 ; and the second hooking component 22 is disposed at a middle position of the second inner fork 123 .

[0026] In specific practice, if the first hooking component 21 is set at the end of the first inner fork 113, the length of the first inner fork 113 itself and the fork length of the first inner fork 113 relative to the vehicle body will be lengthened when hooking cargo of the same depth. The longer the length of the first inner fork 113, the greater the deflection of the end relative to the horizontal reference point will be due to the increase in weight and distance; if the first hooking component 21 is placed in the middle position of the first inner fork 113, the length of the first inner fork 113 does not need to change with the depth dimension of the cargo, the length of the first inner fork 113 itself can be shorter, and the length of the cantilever is shorter.

[0027] In the fork plate structure of this embodiment, the length of the first inner fork 113 is smaller than the length of the first outer fork 111 ; the length of the second inner fork 123 is smaller than the length of the second outer fork 121 .

[0028] Specifically, the lengths of the first inner fork 113 and the second inner fork 123 are shortened, and the distance they can extend is greater than their own lengths. After they are fully extended, their deflection is reduced, which not only reduces the weight of the fork plate structure, but also reduces the manufacturing cost of the entire vehicle.

[0029] In the fork plate structure of this embodiment, a first slide rail 1111 is provided on the side of the first outer fork 111 close to the first middle fork 112, and a first slider 1121 is provided on the side of the first middle fork 112 close to the first outer fork 111. The first slider 1121 is movably provided in the first slide rail 1111.

[0030] In the fork plate structure of this embodiment, a first transmission assembly 1122 is provided between the first middle fork 112 and the first inner fork 113 . The first transmission assembly 1122 and the first middle fork 112 are movably provided relative to each other, and the first transmission assembly 1122 and the first inner fork 113 are movably provided relative to each other.

[0031] Specifically, the first telescopic member 11 is primarily composed of a first outer fork 111, a first middle fork 112, a first inner fork 113, a fork timing belt, a first slider 1121, and a first transmission assembly 1122. It is placed on a linear bearing on the vehicle body. The first outer fork 111 is connected to the first middle fork 112 via a first slide rail 1111, allowing the two to slide relative to each other. The first middle fork 112 is connected to the first inner fork 113 via an inner fork first transmission assembly 1122, allowing the first outer fork 111, first middle fork 112, and first inner fork 113 to slide relative to each other.

[0032] Preferably, the first telescopic assembly also includes two fork timing belts, wherein both fork timing belts are open timing belts, one end of which is fixed on the first outer fork 111, passes through the first middle fork 112, and the other end is fixed on the first inner fork 113, so as to realize the relative sliding of the first inner fork 113 and the first outer fork 111; the first middle fork 112 is driven by the first driving component 31 to slide relative to the first outer fork 111, and the fork timing belt pulls the first inner fork 113 to slide relative to it, so that the hook assembly 2 moves to the depth for picking up and placing materials.

[0033] In the fork plate structure of this embodiment, the first driving component 31 includes: a first driving wheel 311, the first driving wheel 311 is used to drive the first telescopic component 11 to extend or shorten along the first preset direction; a first driven wheel 312, the first driven wheel 312 is used to drive the second telescopic component 12 to extend or shorten along the first preset direction; a first driving motor 313, the first driving motor 313 is used to drive the first driving wheel 311 to rotate; a first transmission shaft 314, one end of the first transmission shaft 314 is connected to the first driving wheel 311, and the other end of the first transmission shaft 314 is connected to the first driven wheel 312.

[0034] Specifically, the first driving component is mainly composed of a first driving motor 313, a first driving wheel 311, a first driven wheel 312, a fork timing belt, a ball spline bearing, a first transmission shaft 314, a ball screw, a coupling, etc. Among them, the first drive motor 313 is installed on the first telescopic component 11, the first driving wheel 311 is fixedly installed with the first drive motor 313, and the first drive motor 313 drives the first driving wheel 311 to rotate; the first transmission shaft 314 is connected and fixed to the first driving wheel 311 through a keyless bushing; the ball screw is connected to the first transmission shaft 314 through a coupling; the ball spline bearing is passed through the ball screw and installed on the second telescopic component 12, and can slide and rotate on the ball screw; the first driven wheel 312 is fixedly installed with the ball spline bearing, and rotates with the ball spline bearing or slides along the direction of the material width; the two fork synchronous belts are respectively wound around the first driving wheel 311 and the first driven wheel 312, and as the first drive motor 313 rotates, the first telescopic component 11 and the second telescopic component 12 are extended and retracted at the same time.

[0035] Specifically, the first driving component 31 is responsible for driving the telescopic assembly 1 to extend and retract the fork along the depth direction of the material; the first driving component 31 is arranged on the first telescopic component 11 and the second telescopic component 12, and the first driving motor 313 directly drives the first driving wheel 311, and the first driven wheel 312 rotates synchronously with the first driving wheel 311 through the first transmission shaft 314 and the ball spline bearing, thereby driving the first telescopic component 11 and the second telescopic component 12 to extend and retract the fork synchronously.

[0036] In the fork plate structure of this embodiment, the second driving component 32 includes: a second driving wheel 321 and a second driven wheel 322, the second driving wheel 321 is used to drive the second driven wheel 322 to rotate, and the second driven wheel 322 is used to drive the first telescopic component 11 and the second telescopic component 12 to move along the second preset direction; a second driving motor 323, the second driving motor 323 is used to drive the second driving wheel 321 to rotate; a synchronous belt 324, the synchronous belt 324 is used to connect the second driving wheel 321 and the second driven wheel 322.

[0037] Specifically, the second driving component 32 is mainly composed of a second driving motor 323 , a second driving pulley 321 , a second driven pulley 322 and a plurality of synchronous belts 324 .

[0038] Preferably, there are three second driven wheels 322 and three synchronous belts 324, wherein the first synchronous belt is fixedly connected to the first telescopic component 11, the second synchronous belt 324 is fixedly connected to the second telescopic component 12, and the third synchronous belt 324 is connected to both the first synchronous belt and the second synchronous belt. The three second driven wheels 322 and the three synchronous belts 324 are arranged correspondingly.

[0039] In this embodiment, the second driving motor 323 and the second driven wheel 322 are both mounted on the vehicle frame. The second driving wheel 321 is fixedly connected to the second driving motor 323 , and a synchronous belt 324 is wound around the second driving wheel 321 and the second driven wheel 322 .

[0040] Preferably, each synchronous belt 324 passes around its corresponding second driven pulley 322 , and the second drive motor 323 drives the second driving pulley 321 to rotate, driving the multiple synchronous belts 324 and their corresponding second driven pulleys 322 to rotate in the same direction and at equal distances.

[0041] Specifically, the first synchronous belt and the second synchronous belt rotate to drive the first telescopic component 11 and the second telescopic component 12 to move toward and away from each other along the width direction of the material.

[0042] In the fork plate structure of this embodiment, the second driving component 32 further includes a tensioning device 325 , which is used to tighten the synchronous belt 324 .

[0043] Specifically, the synchronous belt tensioning device is used in the case of tightening the synchronous belt under less force. The first synchronous belt, the second synchronous belt and the third synchronous belt are all open synchronous belts, and the multiple open synchronous belts are tightened by the synchronous belt tensioning device.

[0044] Specifically, both ends of the opening pass through the tensioning seat of the tensioning device 325, wherein one end of the open synchronous belt is pressed on the fixed pressure plate of the tensioning device 325, and the fixed pressure plate of the tensioning device 325 and the tensioning seat are fixed with screws; the other end of the open synchronous belt is pressed on the movable pressure plate of the tensioning device 325, so that the tension of the synchronous belt can be adjusted using the adjusting screw, and the movable pressure plate and the tensioning seat are fixed with screws.

[0045] In the fork plate structure of this embodiment, the first hooking component 21 includes at least two hooking blocks 211, and the at least two hooking blocks 211 are arranged at intervals.

[0046] In this embodiment, one end of the fork timing belt is fixed on the first outer fork 111, and the other end passes through the first middle fork 112 and is fixed on the first inner fork 113. The fork timing belt is tooth-engaged with the first middle fork 112. The rotation of the fork timing belt drives the first middle fork 112 to extend. The first middle fork 112 pushes the fork timing belt to move, and the fork timing belt pulls the first inner fork 113 to extend.

[0047] Specifically, the first transmission assembly 1122 includes a linear guide seat, a short linear guide, and a long linear guide, which are staggered in the vertical direction. The long linear guide is installed on the first middle fork 112, and the short linear guide is installed on the first inner fork 113. The linear guide seat contains 4 linear guide sliders, and the linear guide seat can slide arbitrarily between the first inner fork 113 and the first middle fork 112 along the long linear guide and the short linear guide.

[0048] Preferably, the length of the first middle fork 112 is set to X1, the length of the first inner fork 113 is set to X2, and the length of the linear guide seat is set to X3. The maximum distance that the first inner fork 113 can extend relative to the first middle fork 112 along the length direction (i.e., the first preset direction) during the fork extension process is: X=(X1+X2) / 2-X3.

[0049] In this embodiment, X1 is longer and X3 is shorter, and the extendable length X of the first inner fork 113 is greater than its own length X2.

[0050] Example 1: In this embodiment, the length of the first middle fork 112 is 1330 mm, the length of the first inner fork 113 is 550 mm, the length of the linear guide seat is 165 mm, and the maximum distance that the first inner fork 113 can be extended relative to the middle fork assembly along the length direction during the fork extension process is: X=(X1+X2) / 2-X3=775 mm, which is greater than the length of the first inner fork 113 itself. When the total extension length of the fork remains unchanged, this setting can reduce the length of the first inner fork 113, reduce the weight of the first inner fork 113, and reduce the sagging deflection of the fork in the height direction (vertical direction) after extension.

[0051] Preferably, the linear sliders used in the linear guide seat, the rated static moment MY of the two side-by-side linear sliders is greater than the torque that the first inner fork 113 needs to overcome in the extended state.

[0052] This embodiment also provides a cargo fork, comprising a vehicle body and a fork plate structure; a driving assembly 3 is provided on the vehicle body.

[0053] In this way, the driving component 3 arranged on the vehicle body drives the telescopic component 1 to move in the first preset direction and the second preset direction, and then drives the hooking component 2 to move to the position of the material box, clamps or releases according to the size of the material box, and hooks the material box, solving the problem of power supply and communication difficulties of the hooking motor on ordinary forks.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0055] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0056] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0057] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0058] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A fork plate structure, characterized in that: include: A telescopic assembly (1), the telescopic assembly (1) comprising a first telescopic component (11) and a second telescopic component (12) arranged at intervals, the first telescopic component (11) and the second telescopic component (12) being arranged telescopically; A hooking assembly (2), the hooking assembly (2) comprising a first hooking assembly (21) provided on the first telescopic assembly (11) and a second hooking assembly (22) provided on the second telescopic assembly (12), the first hooking assembly (21) extending in a direction close to the second telescopic assembly (12), the second hooking assembly (22) extending in a direction close to the first telescopic assembly (11), the hooking assembly (2) being used for hooking a material box; A driving assembly (3), the driving assembly (3) comprising a first driving component (31) and a second driving component (32), the first driving component (31) being used to drive the hooking assembly (2) to extend and retract along a first preset direction; the second driving component (32) being used to drive the hooking assembly (2) to move along a second preset direction.

2. The fork plate structure according to claim 1, characterized in that: The first telescopic component (11) comprises a first outer fork (111), a first middle fork (112), and a first inner fork (113); the first outer fork (111) and the first middle fork (112) are relatively movably arranged; the first middle fork (112) and the first inner fork (113) are relatively movably arranged; a first hooking component (21) is provided on a side of the first inner fork (113) close to the second telescopic component (12); The second telescopic component (12) comprises a second outer fork (121), a second middle fork (122) and a second inner fork (123); the second outer fork (121) and the second middle fork (122) are relatively movably arranged; the second middle fork (122) and the second inner fork (123) are relatively movably arranged; a second hooking component (22) is arranged on a side of the second inner fork (123) close to the first telescopic component (11); the second hooking component (22) is arranged corresponding to the first hooking component (21).

3. The fork plate structure according to claim 2, characterized in that: The length of the first inner fork (113) is shorter than the length of the first outer fork (111); and the length of the second inner fork (123) is shorter than the length of the second outer fork (121).

4. The fork plate structure according to claim 2, characterized in that: A first slide rail (1111) is provided on a side of the first outer fork (111) close to the first middle fork (112), and a first slider (1121) is provided on a side of the first middle fork (112) close to the first outer fork (111). The first slider (1121) is movably provided in the first slide rail (1111).

5. The fork plate structure according to claim 2, characterized in that: A first transmission assembly (1122) is provided between the first middle fork (112) and the first inner fork (113); the first transmission assembly (1122) and the first middle fork (112) are movably provided relative to each other, and the first transmission assembly (1122) and the first inner fork (113) are movably provided relative to each other.

6. The fork plate structure according to claim 1, characterized in that: The first driving component (31) comprises: a first driving wheel (311), the first driving wheel (311) being used to drive the first telescopic component (11) to extend or shorten along the first preset direction; a first driven wheel (312), the first driven wheel (312) being used to drive the second telescopic component (12) to extend or shorten along the first preset direction; A first driving motor (313), the first driving motor (313) is used to drive the first driving wheel (311) to rotate; A first transmission shaft (314), one end of the first transmission shaft (314) is connected to the first driving wheel (311), and the other end of the first transmission shaft (314) is connected to the first driven wheel (312).

7. The fork plate structure according to claim 1, characterized in that: The second driving component (32) comprises: a second driving wheel (321) and a second driven wheel (322), wherein the second driving wheel (321) is used to drive the second driven wheel (322) to rotate, and the second driven wheel (322) is used to drive the first telescopic component (11) and the second telescopic component (12) to move along the second preset direction; A second drive motor (323), the second drive motor (323) is used to drive the second driving wheel (321) to rotate; A synchronous belt (324), the synchronous belt (324) is used to connect the second driving wheel (321) and the second driven wheel (322).

8. The fork plate structure according to claim 7, characterized in that: The second driving component (32) further includes a tensioning device (325), and the tensioning device (325) is used to tighten the synchronous belt (324).

9. The fork plate structure according to claim 1, characterized in that: The first hooking component (21) comprises at least two hooking blocks (211), and the at least two hooking blocks (211) are arranged at intervals.

10. A fork, characterized in that: It comprises a vehicle body and the fork plate structure according to any one of claims 1 to 9; the vehicle body and the hook assembly (2) are arranged to be relatively movably.

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