Fork assembly and shuttle vehicle

Abstract

The application relates to a fork assembly and a shuttle vehicle, the fork assembly comprising: a fixed plate; a driving plate movably arranged on the fixed plate in a first direction under control; a movable pulley rotatably arranged on the driving plate around an axis of the movable pulley, the axis of the movable pulley being perpendicular to the first direction; a movable plate movably arranged on the driving plate in the first direction, the movable plate being provided with a lever structure; a synchronous belt having a first end and a second end opposite in a longitudinal direction of the synchronous belt, the synchronous belt being arranged around the movable pulley, the first end being connected with the fixed plate, and the second end being connected with the driving plate, the inside and / or the surface of the synchronous belt being provided with a connecting wire, and the connecting wire being electrically connected with the lever structure. The lever structure and a power supply or a control mainboard on the shuttle vehicle are connected through the connecting wire, instead of a traditional drag chain structure, so that the failure rate of the fork assembly is reduced, and the space utilization of the fork assembly is improved.

Description

Technical Field

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

[0002] To improve storage and picking efficiency, shuttles are widely used in modern warehousing. Shuttles carry goods for turnover and move through racks to store and retrieve goods. The fork assembly, as the core actuator installed on the shuttle, enables the shuttle's goods storage and retrieval functions. The fork assembly mainly uses a transmission component to drive the simultaneous extension of multiple sections of the fork plate and outer forks. Combined with a finger lever structure, it can store bins or cartons from storage locations and connecting conveyor sections into the bin shuttle. Currently, most shuttle fork assemblies use cable chains for power supply, but cable chains typically use two matching chains, resulting in high space occupancy and a high failure rate. Utility Model Content

[0003] Therefore, it is necessary to provide a fork assembly and shuttle to address the problems of high space occupancy and high failure rate of existing fork assembly cable supply.

[0004] A fork assembly, comprising:

[0005] Fixing plate;

[0006] A drive board is controllably and movably disposed on the fixed plate along a first direction;

[0007] A movable pulley is rotatably mounted on the drive plate about its own axis, and the axis of the movable pulley is perpendicular to the first direction;

[0008] A movable plate is movably disposed on the drive plate along the first direction, and a lever structure is provided on the movable plate;

[0009] A synchronous belt has a first end and a second end opposite to each other in its longitudinal direction. The synchronous belt is wound around the movable pulley, and the first end is connected to the fixed plate, the second end is connected to the drive plate, and the synchronous belt has connecting wires inside and / or on its surface. The connecting wires are electrically connected to the lever structure.

[0010] In one embodiment, both the movable pulley and the timing belt include two pulleys, which are spaced apart on the fixed plate along the first direction, and each timing belt is wound around one of the movable pulleys.

[0011] In one embodiment, the lever structure includes a main control unit, a plurality of lever motors, and a plurality of levers. Each lever motor is drivenly connected to one of the levers. The main control unit is electrically connected to all the lever motors. The connecting wire is connected to the main control unit.

[0012] In one embodiment, the bottom of the drive plate is provided with drive teeth that extend longitudinally along the first direction;

[0013] The fork assembly also includes a drive module, which meshes with the drive teeth and drives the drive plate to move along the first direction.

[0014] In one embodiment, the drive module includes a drive sprocket, a driven sprocket, and a chain assembly. The axes of the drive sprocket and the driven sprocket are perpendicular to the first direction and are spaced apart along the first direction. The chain assembly is sleeved on the drive sprocket and the driven sprocket and meshes with the drive teeth.

[0015] In one embodiment, the chain assembly includes a drive chain and a transmission chain fixedly connected to each other. The drive chain includes two chains, and the transmission chain is located between the two drive chains. The driving sprocket and the driven sprocket are both double-row sprockets. Each drive chain meshes with the driving sprocket and the driven sprocket, and the transmission chain meshes with the drive teeth.

[0016] In one embodiment, the fork assembly further includes a slide rail and a slide bar, the slide rail and the slide bar being spaced apart along the first direction and slidingly engaged with each other, one of the slide rail and the slide bar being disposed on the fixed plate and the other being disposed on the drive plate;

[0017] And / or, one of the slide rail and the slide rod is disposed on the drive plate, and the other is disposed on the movable plate.

[0018] In one embodiment, the fork assembly further includes a clamping module disposed on the fixed plate and clamping the first end of the timing belt onto the fixed plate;

[0019] And / or, the clamping module is disposed on the movable plate and clamps the second end of the timing belt onto the movable plate.

[0020] In one embodiment, the clamping module includes a clamping base plate, a clamping top plate, and a plurality of clamping bolts. Each clamping top plate has a plurality of first mounting holes, the clamping base plate has a plurality of second mounting holes, and the fixed plate and / or the movable plate has a plurality of third mounting holes. All the first mounting holes, all the second mounting holes, and all the third mounting holes correspond one-to-one. The clamping bolts pass through the first mounting holes, the second mounting holes, and the third mounting holes. The timing belt is clamped between the clamping base plate and the clamping top plate.

[0021] A shuttle vehicle including a fork assembly as described in any of the preceding claims.

[0022] In the aforementioned fork assembly, as the drive plate moves relative to the fixed plate, the movable plate moves along with it via a pulley and a timing belt. This allows the movable plate to extend in sync with the drive plate's extension and retract in sync with its retraction, resulting in a longer extension distance for the fork assembly. Furthermore, by incorporating connecting wires within the timing belt to the lever structure and the power supply or control board on the shuttle, the traditional cable chain structure is replaced. This not only reduces the failure rate of the fork assembly but also improves its space utilization. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the shuttle vehicle structure in some embodiments of this application.

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the shuttle car's hidden fixing plate in the embodiment.

[0025] Figure 3 for Figure 1 A schematic diagram of the structure of the shuttle car's hidden movable plate in the embodiment.

[0026] Figure 4 This is an exploded view of the fork assembly in some embodiments of this application.

[0027] Figure 5 This is a schematic diagram of the structure of the driver module in some embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] Fork assembly 100; Vehicle body 200;

[0030] 10. Fixed plate; 11. Slide rail; 12. Slide rod; 13. Pressing module; 14. Pressing base plate; 15. Pressing top plate; 16. Pressing bolt;

[0031] Drive plate 20; drive gear 21; drive module 22; drive sprocket 23; driven sprocket 24; chain assembly 25; drive chain 26; transmission chain 27;

[0032] 30 movable pulleys;

[0033] 40. Movable plate; 41. Toggle structure; 42. Main control component; 43. Toggle motor; 44. Toggle lever;

[0034] Synchronous belt 50; first end 51; second end 53. Detailed Implementation

[0035] 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.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] 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 based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0040] It should be noted that if 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. If 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. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] See Figure 1 , Figure 1 A schematic diagram of a shuttle vehicle according to one embodiment of this application is shown. The shuttle vehicle provided in this embodiment includes a vehicle body 200 and two fork assemblies 100 disposed on the vehicle body 200. A transport position for goods is formed between the two fork assemblies 100. The vehicle body 200 supports the movement of the fork assemblies 100 on the shelf. When the shuttle vehicle moves to a designated position, the fork assemblies 100 extend to place the goods between the two fork assemblies 100, and then the fork assemblies 100 retract to retrieve the goods to the transport position. Alternatively, the two fork assemblies 100 extend to place the goods located at the transport position onto the shelf, thereby realizing the placement or retrieval of goods.

[0042] See Figure 2 and Figure 3The fork assembly 100 includes: a fixed plate 10, a drive plate 20, a movable pulley 30, a movable plate 40, and a timing belt 50. The drive plate 20 is controllably and movably disposed on the fixed plate 10 along a first direction. The movable pulley 30 is rotatably disposed on the drive plate 20 about its own axis, and the axis of the movable pulley 30 is perpendicular to the first direction. The movable plate 40 is movably disposed on the drive plate 20 along the first direction. The timing belt 50 has a first end 51 and a second end 53 opposite to each other in its longitudinal direction. The timing belt 50 is wound around the movable pulley 30, and the first end 51 is connected to the fixed plate 10, and the second end 53 is connected to the drive plate 20.

[0043] In actual use, when the fork assembly 100 needs to extend to pick up goods, the drive plate 20 moves relative to the fixed plate 10, causing the fixed plate 10 to extend relative to the drive plate 20. At this time, the drive plate 20 drives the movable pulley 30 to move away from the first end 51 of the timing belt 50 fixed on the fixed plate 10. As the first end 51 moves away from the movable pulley 30, since the length of the timing belt 50 is fixed, the second end 53 of the timing belt 50 needs to approach the movable pulley 30. The second end 53 of the timing belt 50 is fixed on the movable plate 40. Therefore, the process of the second end 53 approaching the movable pulley 30 can cause the movable plate 40 to move relative to the drive plate 20, so that the movable plate 40 and the drive plate 20 extend relative to the fixed plate 10 at the same time, thereby increasing the overall length of the fork assembly 100 to facilitate picking up goods.

[0044] The movable plate 40 is equipped with a lever structure 41, which is used to fix or release goods. When goods are located between the two fork assemblies 100, the lever structure 41 on the two fork assemblies 100 fixes the goods, and coordinates with the extension and retraction of the movable plate 40 and the drive plate 20 to place or retrieve the goods. In order to control the fixing or releasing of goods by the lever structure 41, it is usually necessary to connect the lever structure 41 to the power supply on the shuttle, so that the power supply drives the lever structure 41 to move.

[0045] For this purpose, a connecting wire is provided inside the synchronous belt 50. One end of the connecting wire passes through the synchronous belt 50 and is electrically connected to the lever structure 41. The other end of the connecting wire passes through the synchronous belt 50 and is electrically connected to the power supply or control board of the shuttle. The connecting wire and the synchronous belt 50 are wound together on the movable pulley 30 so that the connecting wire can move relative to the movable pulley 30 along with the synchronous belt 50.

[0046] However, since the first end 51 of the synchronous belt 50 is fixed on the fixed plate 10, the position of the first end 51 of the synchronous belt 50 relative to the fixed plate 10 is fixed. Similarly, the position of the end of the connecting wire that passes through the synchronous belt 50 and is electrically connected to the power supply or control motherboard relative to the fixed plate 10 is also fixed. Therefore, the position of the connecting wire at this end relative to the power supply or control motherboard is also fixed, so that the connection between the connecting wire and the power supply or control motherboard is not affected by the movement of the drive board 20 and the motion board.

[0047] Similarly, since the second end 53 of the synchronous belt 50 is fixed on the movable plate 40, the second end 53 of the synchronous belt 50 is fixed relative to the movable plate 40. Likewise, the end of the connecting wire that passes through the synchronous belt 50 and is electrically connected to the lever structure 41 is also fixed relative to the movable plate 40. Therefore, the position of the connecting wire at this end relative to the lever structure 41 is also fixed, so that the connection between the connecting wire and the lever structure 41 is not affected by the movement of the drive plate 20 and the moving plate.

[0048] It is understandable that in other embodiments, the connecting wire can be directly placed on the surface of the timing belt 50. Placing the connecting wire inside the timing belt 50 not only allows it to move with the timing belt 50 but also provides protection for it. In actual use, the timing belt 50 is made of rubber. During manufacturing, the connecting wire is embedded within the rubber, thus completing the wrapping of the connecting wire by the timing belt 50.

[0049] In the aforementioned fork assembly 100, during the movement of the drive plate 20 relative to the fixed plate 10, the movable plate 40 moves along with the drive plate 20 via the movable pulley 30 and the timing belt 50. This allows the movable plate 40 to extend in sync with the extension and retract in sync with the retraction of the drive plate 20, enabling the fork assembly 100 to have a longer extension distance. Furthermore, by incorporating connecting wires within the timing belt 50 to connect the lever structure 41 to the power supply or control board on the shuttle, replacing the traditional cable chain structure, not only is the failure rate of the fork assembly 100 reduced, but the space utilization rate of the fork assembly 100 is also improved.

[0050] In some embodiments of this application, see [reference] Figure 4Each movable pulley 30 and synchronous belt 50 comprises two pulleys. The two movable pulleys 30 are spaced apart on the fixed plate 10 along a first direction, and each synchronous belt 50 is wound around one of the movable pulleys 30. Thus, the two movable pulleys 30, in conjunction with the two synchronous belts 50, make the movement of the movable plate 40 relative to the drive plate 20 smoother. In actual use, each synchronous belt 50 and its corresponding movable pulley 30 form a sliding structure, and the two sliding structures are symmetrically arranged to improve the smoothness of the movement of the movable plate 40.

[0051] In some embodiments of this application, the lever structure 41 includes a main control unit 42, multiple lever motors 43, and multiple levers 44. Each lever motor 43 is connected to one of the levers 44 to control the rotation of the lever 44 relative to the movable plate 40. The multiple levers 44 enable the release or retrieval of goods. The main control unit 42 is electrically connected to all the lever motors 43. Connecting wires are connected to the main control unit 42, meaning that electrical energy is transmitted to the main control unit 42 via connecting wires and then distributed to each lever motor 43. This reduces the number of points where the connecting wires need to exit the synchronous belt 50, making the wiring more streamlined and reducing the failure rate of the shuttle.

[0052] In some embodiments of this application, see [reference] Figure 5 To drive the drive plate 20 to move, a drive tooth 21 extending longitudinally in a first direction is provided at the bottom of the drive plate 20. The fork assembly 100 also includes a drive module 22, which meshes with the drive tooth 21 and drives the drive plate 20 to move in the first direction. This meshing method makes the connection between the drive module 22 and the drive plate 20 more stable, improving the stability of the drive plate 20's movement.

[0053] In some specific embodiments, the drive module 22 includes a drive sprocket 23, a driven sprocket 24, and a chain assembly 25. The axes of the drive sprocket 23 and the driven sprocket 24 are perpendicular to the first direction and are spaced apart along the first direction. The chain assembly 25 is sleeved on the drive sprocket 23 and the driven sprocket 24 and meshes with the drive teeth 21. In actual use, the drive sprocket 23 is connected to the drive motor located on the vehicle body 200 of the shuttle, so that the drive sprocket 23 rotates around itself under the drive of the drive motor. During the rotation of the drive sprocket 23, it will drive the chain assembly 25 to move. The chain assembly 25 will then drive the drive plate 20 to move in the first direction through the drive teeth 21. According to the forward or reverse rotation of the drive sprocket 23 around its own axis, the drive plate 20 can extend and retract relative to the fixed plate 10.

[0054] Furthermore, the chain assembly 25 includes a drive chain 26 and a transmission chain 27 fixedly connected to each other. The drive chain 26 comprises two chains, and the transmission chain 27 is located between the two drive chains 26. Both the driving sprocket 23 and the driven sprocket 24 are double-row sprockets. Each drive chain 26 meshes with both the driving sprocket 23 and the driven sprocket 24, and the transmission chain 27 meshes with the drive teeth 21. Thus, the transmission chain 27 located between the two drive chains 26 does not mesh with the driving sprocket 23 and the driven sprocket 24. Therefore, when the transmission rack drives the drive plate 20 to move via the drive teeth 21, it is not interfered with by the driving sprocket 23 and the driven sprocket 24, allowing the drive plate 20 to move a longer distance relative to the fixed plate 10.

[0055] It should be noted that in some other embodiments, the drive module 22 can also be a drive gear 21 wheel. The drive gear 21 wheel can rotate around its own axis and mesh with the drive teeth 21. When the drive gear 21 wheel rotates, it can drive the drive plate 20 to move through the drive teeth 21. The chain drive method makes it easy to disassemble the chain, which is beneficial for the maintenance of the drive module 22.

[0056] Specifically, in some embodiments, see [link to relevant documentation]. Figure 4 To improve the stability of the drive plate 20's movement relative to the fixed plate 10, the fork assembly 100 also includes a slide rail 11 and a slide rod 12. The slide rail 11 and slide rod 12 are spaced apart along a first direction and slide against each other. The slide rail 11 is mounted on the fixed plate 10, and the slide rod 12 is mounted on the drive plate 20. Thus, when the drive plate 20 moves relative to the fixed plate 10 under the action of the drive module 22, the slide rod 12 also moves within the slide rail 11, thereby enabling the drive plate 20 to move stably relative to the fixed plate 10.

[0057] Furthermore, a slide rail 11 can also be provided on the drive plate 20, and a slide rod 12 can be provided on the movable plate 40, so as to improve the stability of the movement of the movable plate 40 relative to the drive plate 20 through the cooperation of the slide rail 11 and the slide rod 12. It is understood that in some other embodiments, a slide rod 12 can also be provided on the fixed plate 10, and a slide rail 11 corresponding to the slide rod 12 can be provided on the drive plate 20, or a slide rod 12 can be provided on the drive plate 20, and a slide rail 11 corresponding to the slide rod 12 can be provided on the movable plate 40.

[0058] In some embodiments of this application, see [reference] Figure 4The fork assembly 100 also includes a clamping module 13. The clamping module 13 is mounted on the fixed plate 10 and is used to clamp the first end 51 of the timing belt 50 onto the fixed plate 10. The movable plate 40 is also equipped with a clamping module 13, which is used to clamp the second end 53 of the timing belt 50 onto the movable plate 40. In this way, by clamping the timing belt 50, the integrity of the timing belt 50 can be ensured, tearing of the timing belt 50 can be avoided, and the service life of the timing belt 50 can be improved.

[0059] Furthermore, the clamping module 13 includes a clamping base plate 14, a clamping top plate 15, and multiple clamping bolts 16. Each clamping top plate 15 has multiple first mounting holes, the clamping base plate 14 has multiple second mounting holes, and the fixing plate 10 has multiple third mounting holes. All the first mounting holes, all the second mounting holes, and all the third mounting holes in the clamping module 13 on the fixing plate 10 correspond one-to-one. The clamping bolts 16 pass through the first mounting holes, second mounting holes, and third mounting holes, so that the clamping bolts 16 can fix the clamping base plate 14 and the clamping top plate 15 to the fixing plate 10. The timing belt 50 is located between the clamping base plate 14 and the clamping top plate 15, so that the timing belt 50 is clamped between the clamping base plate 14 and the clamping top plate 15.

[0060] Furthermore, multiple third mounting holes are also provided on the movable plate 40. All the first mounting holes, all the second mounting holes and all the third mounting holes in the clamping module 13 on the movable plate 40 correspond one-to-one. The clamping bolts 16 pass through the first mounting holes, the second mounting holes and the third mounting holes so that the clamping bolts 16 can fix the clamping base plate 14 and the clamping top plate 15 on the movable plate 40.

[0061] The fork assembly 100 described above has at least the following advantages:

[0062] During the movement of the drive plate 20 relative to the fixed plate 10, the movable plate 40 moves along with the drive plate 20 via the movable pulley 30 and the timing belt 50. This allows the movable plate 40 to extend in sync with the extension and retract in sync with the retraction of the drive plate 20, enabling the fork assembly 100 to have a longer extension distance. Furthermore, by incorporating connecting wires within the timing belt 50 to connect the lever structure 41 to the power supply or control board on the shuttle, the traditional cable chain structure is replaced. This not only reduces the failure rate of the fork assembly 100 but also improves its space utilization.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fork assembly, characterized in that, The fork assembly includes: Fixing plate (10); The drive plate (20) is controllably and movably disposed on the fixed plate (10) along a first direction; A movable pulley (30) is rotatably mounted on the drive plate (20) about its own axis, and the axis of the movable pulley (30) is perpendicular to the first direction; A movable plate (40) is movably disposed on the drive plate (20) along the first direction, and a lever structure (41) is provided on the movable plate (40). The synchronous belt (50) has a first end (51) and a second end (53) opposite to each other in its longitudinal direction. The synchronous belt (50) is wound around the movable pulley (30), and the first end (51) is connected to the fixed plate (10), and the second end (53) is connected to the drive plate (20). The synchronous belt (50) is provided with connecting wires inside and / or on its surface, and the connecting wires are electrically connected to the lever structure (41).

2. The fork assembly according to claim 1, characterized in that, The movable pulley (30) and the synchronous belt (50) each include two, and the two movable pulleys (30) are arranged at intervals on the fixed plate (10) along the first direction, and each synchronous belt (50) is wound around one of the movable pulleys (30).

3. The fork assembly according to claim 1, characterized in that, The lever structure (41) includes a main control unit (42), multiple lever motors (43) and multiple levers (44). Each lever motor (43) is connected to one of the levers (44) in a transmission connection. The main control unit (42) is electrically connected to all the lever motors (43). The connecting wire is connected to the main control unit (42).

4. The fork assembly according to claim 1, characterized in that, The bottom of the drive plate (20) is provided with drive teeth (21) that extend longitudinally along the first direction. The fork assembly also includes a drive module (22), which meshes with the drive teeth (21) and drives the drive plate (20) to move along the first direction.

5. The fork assembly according to claim 4, characterized in that, The drive module (22) includes a drive sprocket (23), a driven sprocket (24) and a chain assembly (25). The axes of the drive sprocket (23) and the driven sprocket (24) are perpendicular to the first direction and are spaced apart along the first direction. The chain assembly (25) is sleeved on the drive sprocket (23) and the driven sprocket (24) and meshes with the drive teeth (21).

6. The fork assembly according to claim 5, characterized in that, The chain assembly (25) includes a drive chain (26) and a transmission chain (27) fixedly connected to each other. The drive chain (26) includes two chains, and the transmission chain (27) is located between the two drive chains (26). The driving sprocket (23) and the driven sprocket (24) are both double-row sprockets. Each drive chain (26) meshes with the driving sprocket (23) and the driven sprocket (24), and the transmission chain (27) meshes with the drive tooth (21).

7. The fork assembly according to claim 1, characterized in that, The fork assembly also includes a slide rail (11) and a slide rod (12). The slide rail (11) and the slide rod (12) are spaced apart along the first direction and slide together. One of the slide rail (11) and the slide rod (12) is located on the fixed plate (10), and the other is located on the drive plate (20). And / or, one of the slide rail (11) and the slide rod (12) is disposed on the drive plate (20), and the other is disposed on the movable plate (40).

8. The fork assembly according to claim 1, characterized in that, The fork assembly also includes a clamping module (13), which is disposed on the fixed plate (10) and clamps the first end (51) of the timing belt (50) onto the fixed plate (10); And / or, the clamping module (13) is disposed on the movable plate (40) and clamps the second end (53) of the timing belt (50) onto the movable plate (40).

9. The fork assembly according to claim 8, characterized in that, The clamping module (13) includes a clamping base plate (14), a clamping top plate (15), and a plurality of clamping bolts (16). Each clamping top plate (15) has a plurality of first mounting holes, the clamping base plate (14) has a plurality of second mounting holes, and the fixed plate (10) and / or the movable plate (40) has a plurality of third mounting holes. All the first mounting holes, all the second mounting holes, and all the third mounting holes correspond one-to-one. The clamping bolts (16) pass through the first mounting holes, the second mounting holes, and the third mounting holes. The timing belt (50) is clamped between the clamping base plate (14) and the clamping top plate (15).

10. A shuttle vehicle, characterized in that, Includes the fork assembly (100) as described in any one of claims 1-9.

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