Three-stage module telescopic pallet fork

Abstract

The invention relates to the technical field of intelligent warehousing forks, in particular to a three-stage module telescopic fork which comprises a fork plate used for taking and placing articles, and the lower portion of the fork plate is sequentially provided with a top module, a middle module and a bottom module which are detachably connected; the fork plate and the top module, the top module and the middle module, and the middle module and the bottom module are connected through guide rails and sliding blocks so that the stroke of the fork plate can be increased, and the whole mechanism can be fixed. According to the invention, technologies such as PLC control, servo motor driving, synchronous belt transmission, guide rail sliding block guiding and sensor detection are integrated, and the control precision is improved from the two aspects of software and hardware. The guide mechanism adopts the linear guide rails and the sliding blocks, each guide rail is provided with at least two sets of sliding blocks, good rigidity and bearing capacity are achieved, the linear guide rails with prepressing can be selected, and gaps between the guide rails and the sliding blocks are further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of forks for intelligent warehousing, and in particular to a three-stage module telescopic fork. Background Art

[0002] With the development of society, intelligent manufacturing has become a consensus of development. In this context, unmanned workshops and dust-free workshops began to appear, and various intelligent fully automatic equipment were born. At the same time, various types of stereoscopic warehouses and intelligent storage systems also began to appear. In stereoscopic warehouses and intelligent storage systems, forks are the main transfer mechanism for storing and retrieving items.

[0003] To this end, someone has designed a three-stage telescopic fork and stacker (Announcement No. CN216946060U), including: a primary fork; a secondary fork, slidably connected to the primary fork; a tertiary fork, slidably connected to the secondary fork; a synchronization component, respectively connected to the primary fork, the secondary fork and the tertiary fork; wherein the synchronization component is used to drive the primary fork and the secondary fork to slide synchronously. Since the primary fork and the secondary fork are slidably connected, and the secondary fork and the tertiary fork are slidably connected, the synchronous sliding of the primary fork and the secondary fork can be achieved through the synchronization component, so the length of the fork can be reduced as much as possible to save space.

[0004] However, most of the telescopic forks in the prior art use chain transmission, which has the disadvantage of poor positioning accuracy; moreover, the main material of this type of telescopic fork is mostly carbon steel, and this type of structure is heavy, and in actual application, the surface treatment layer is easily damaged due to daily use, thereby causing rust and contamination to the product, and therefore cannot meet the requirements of a dust-free workshop.

[0005] In view of the shortcomings of the prior art, the present invention provides a three-stage module telescopic fork mechanism suitable for dust-free workshops. The mechanism, with its high positioning accuracy, low dust generation characteristics and cost-effectiveness, effectively solves the problems of high cost, insufficient positioning accuracy and unsuitability of existing equipment in dust-free environments. Summary of the invention

[0006] In order to achieve the above purpose of effectively solving the problems of high cost, insufficient positioning accuracy and unsuitability for dust-free environment of existing equipment, the present invention provides the following technical solutions: A three-stage module telescopic fork, comprising: A fork plate, which is used for taking and placing articles, wherein the lower part of the fork plate is sequentially constructed with a detachably connected top module, a middle module and a bottom module; The surface of the top module is provided with a guide rail and a slider which are respectively connected with the fork plate and the middle module to increase the travel of the fork plate; The inner side of the middle module is provided with a guide rail and a slider which are respectively connected with the top module and the bottom module to increase the travel of the fork plate; A guide rail is installed on the inner side of the bottom module and connected to the middle module for fixing the whole mechanism; A detection mechanism, composed of sensors respectively mounted on the fork plate and the top module, for detecting the position of the fork plate in real time and providing accurate positioning; A driving mechanism and a transmission assembly connected to the driving mechanism are installed on the surface of the bottom module.

[0007] Optionally, the driving mechanism is composed of a PLC controller, a servo motor and a synchronous belt group, which is used to output power, transmit power to different modules and fork plates, and is controlled in real time by the PLC controller.

[0008] Optionally, the servo motor is installed on the surface of the bottom module, a coupling is installed at the output end of the servo motor, and the transmission assembly includes a primary pulley assembly installed on the inner side of the bottom module and connected to the coupling, a secondary pulley assembly installed on the inner side of the middle module, and a tertiary pulley assembly installed in the top module.

[0009] Optionally, a transition pulley connected to the primary pulley assembly is installed on the surface of the secondary pulley assembly, and a fixed pulley connected to the primary pulley assembly is installed on the inner side of the intermediate module.

[0010] Optionally, the fixed wheel and the transition pulley are at the same horizontal height and are respectively located on both sides of the transition pulley.

[0011] Optionally, a toothed mounting plate connected to the top module is installed on the surface of the secondary pulley assembly, a connecting plate is installed on the surface of the tertiary pulley assembly, a fork plate is connected to the connecting plate, and a bearing seat tensioning block is installed at one end of the tertiary pulley assembly.

[0012] Optionally, a dustproof drag chain connected to a fork plate is installed on the surface of the top module to bear the electrical connection equipment.

[0013] Optionally, a plurality of anti-sliding blocks that are equidistantly distributed are installed on the surface of the fork plate.

[0014] Optionally, a protective pad is installed at the front end of the fork plate, and a mounting hole is opened through the surface of the bottom module.

[0015] Optionally, each guide rail is equipped with at least 2 sets of sliders.

[0016] Beneficial Effects Compared with the prior art, the present invention provides a three-stage module telescopic fork, which has the following beneficial effects: The present invention improves the control accuracy from both software and hardware aspects by integrating PLC control, servo motor drive, synchronous belt drive, guide rail and slider guidance and sensor detection technologies. The guide mechanism adopts linear guide rails and sliders. Each guide rail is equipped with at least two sets of sliders, which has good rigidity and load-bearing capacity. A linear guide rail with preload can be optionally equipped to further reduce the gap between the guide rail and the slider itself. The structural parts are installed vertically, with strong vertical load-bearing capacity, and the deformation itself is much smaller than that of horizontal flat plate installation. The present invention adopts a modular design, and can quickly replace forks of different lengths according to the requirements of different scenarios, so that different working scenarios can be handled without replacing the equipment, thereby improving the adaptability of the equipment, and improving the operating efficiency and flexibility. In addition, due to the modular design, some parts are standard parts, and the replacement and maintenance of the equipment will be more concise and efficient, reducing the maintenance cost of the equipment. The overall structure of the mechanism is novel, the cost is low, and it is suitable for the application scenario of dust-free workshops, and has the potential for wide promotion; The present invention adopts aviation aluminum material in the overall structure, which has the characteristics of rust prevention, light weight and high strength. Compared with traditional telescopic forks, it improves durability and reliability, and also reduces dust generation. Combined with dust-proof drag chains and module covering plates at all levels and other dust-proof measures, it ensures that the product is not contaminated and meets the working requirements of Class 100 dust-free workshops. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention; Figure 2 It is a schematic diagram of the disassembly structure of the device of the present invention; Figure 3 It is a schematic diagram of the guide rail structure of the device of the present invention; Figure 4 It is a schematic diagram of the transmission component structure of the device of the present invention; Figure 5 It is a front structural schematic diagram of the device of the present invention; Figure 6 It is a schematic diagram of the top structure of the device of the present invention.

[0018] In the figure: 1. fork plate; 2. top module; 3. middle module; 4. bottom module; 5. detection mechanism; 6. driving mechanism; 7. dustproof drag chain; 8. anti-sliding block; 9. protective pad; 10. guide rail; 11. slider; 12. servo motor; 13. coupling; 14. primary pulley assembly; 15. secondary pulley assembly; 16. tertiary pulley assembly; 17. transition pulley; 18. fixed wheel; 19. toothed mounting plate; 20. connecting plate; 21. bearing seat tension block; 22. mounting hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example: See Figures 1 to 6 The embodiment of the present invention provides a technical solution: a three-stage module telescopic fork, comprising: a fork plate 1, which is used for picking up and placing articles, and the lower part of the fork plate 1 is sequentially constructed with a detachably connected top module 2, a middle module 3 and a bottom module 4, so that the entire fork structure is highly modular. This design is not only convenient for assembly and maintenance, but also improves the flexibility and scalability of the fork; the fork plate 1 and the top module 2, the top module 2 and the middle module 3, and the middle module 3 and the bottom module 4 are all connected by guide rails 10 and sliders 11 to increase the stroke of the fork plate 1; the surface of the bottom module 4 is installed with a driving mechanism 6 and a transmission component connected to the driving mechanism 6, forming an efficient power transmission system, this design ensures that the fork can be quickly and smoothly extended and retracted, improves work efficiency and stability, and the modular design makes the assembly, disassembly and maintenance of the fork easier, and the modular design also improves the flexibility and scalability of the fork, and different modules can be selected for combination according to different application scenarios and needs to meet specific forking and handling requirements.

[0021] When the above scheme is implemented, the design of the guide rail 10 and the slider 11 makes it possible for each module to move more smoothly, which not only increases the overall stability of the fork, but also ensures the close cooperation between the modules. By adopting a modular design, forks of different lengths can be quickly replaced according to the needs of different scenarios, so that different work scenarios can be coped with without changing the equipment. In addition, due to the modular design, some parts are standard parts, and the replacement and maintenance of equipment will be more concise and efficient, reducing the maintenance cost of the equipment. The overall structure of the mechanism is novel and low in cost. It is suitable for the application scenario of dust-free workshops and has the potential for wide promotion. By integrating PLC control, servo motor drive, and synchronous belt transmission The technologies of motion, guide rail and slider guidance and sensor detection have improved the control accuracy from both software and hardware aspects. The guiding mechanism adopts linear guides and sliders. Each guide rail is equipped with at least 2 sets of sliders, which has good rigidity and load-bearing capacity. Optional linear guides with preload can further reduce the gap between the guide rail and the slider itself. The structural parts are installed vertically with strong vertical load-bearing capacity. The deformation itself is much smaller than that of horizontal flat plate installation. The overall structure is made of aviation aluminum material, which is rust-proof, light in weight and high in strength. Compared with traditional telescopic forks, it improves durability and reliability, and also reduces dust generation. Dust-proof measures such as dust-proof drag chains and module covering plates at all levels can ensure that the product is not contaminated and meet the working requirements of Class 100 dust-free workshops.

[0022] like Figure 1-Figure 2 As shown, in this embodiment, the detection mechanism 5 is composed of sensors installed on the fork plate 1 and the top module 2 respectively, which are used to detect the position of the fork plate 1 in real time and provide precise positioning, providing the fork with the ability of precise positioning, ensuring the accuracy and safety of the items in the process of picking and placing. Furthermore, the sensor uses a slot-type photoelectric switch or a proximity switch, which is fixed on the base bracket. The detection piece can be installed on each level of the telescopic mechanism according to needs. A total of four sensors are equipped, which are used to detect the origin, positive and negative limit positions, respectively. The determination of the middle position of the telescopic mechanism depends on the encoder control of the servo motor. Secondly, a fork extension detection sensor can be added to the third-level fork, which can be used in conjunction with the reflector on the storage space or shelf as a supplement to the servo control. Secondly, a magnetic scale or a grating scale can also be added to the third-level fork for precise position control. Further, a magnetic scale or a grating scale can be added to the third-level telescopic mechanism for closed-loop feedback of the actual distance extended.

[0023] like Figure 4 and Figure 6As shown, in this embodiment, in order to more conveniently and accurately control the moving position of the fork plate 1, the driving mechanism 6 is composed of a PLC controller, a servo motor 12 and a synchronous belt group, which is used to output power, transmit the power to different modules and the fork plate 1, and is controlled in real time by the PLC controller. Through this implementation, the PLC (programmable logic controller) is used as the control core, which has high reliability and powerful control capabilities. It can accurately control the operation of the servo motor 12 according to the preset program and logic. The servo motor 12, as an actuator, has the advantages of fast response speed, accurate positioning, and smooth operation. Through the precise control of the PLC, the servo motor 12 can move at a specified speed and position, thereby realizing precise control of the fork. The synchronous belt group, as a power transmission device, has the advantages of high transmission efficiency, low noise, and easy maintenance. It can efficiently transmit the power of the servo motor to different modules and the fork plate 1 to ensure the stable operation of the fork. By optimizing the design and selection of the synchronous belt group, the efficiency and stability of power transmission can be further improved, thereby meeting the needs of more efficient logistics, warehousing and other application scenarios.

[0024] like Figure 4 and Figure 6 As shown, in this embodiment, in order to more conveniently reflect the three-stage telescopic transmission of the fork, the servo motor 12 is installed on the surface of the bottom module 4, and the output end of the servo motor 12 is installed with a coupling 13. The transmission assembly includes a primary pulley assembly 14 installed on the inner side of the bottom module 4 and connected to the coupling 13, a secondary pulley assembly 15 installed on the inner side of the middle module 3, and a tertiary pulley assembly 16 installed in the top module 2. Through this embodiment, the servo motor 12 is installed on the surface of the bottom module 4, making the entire drive system more compact and reducing the occupied space. The output end of the servo motor is connected to the coupling 13 through the coupling 13. The primary pulley assembly 14 is connected to each other, which realizes the effective transmission of power while maintaining the simplicity of the structure. The primary pulley assembly 14, the secondary pulley assembly 15 and the tertiary pulley assembly 16 realize the step-by-step transmission of power through a synchronous belt or a transmission belt. This transmission method has the advantages of high transmission efficiency, low noise, and easy maintenance. It can ensure the stability and reliability of power during the transmission process. The servo motor 12 has the characteristics of high precision and high response speed, and can realize precise control of the fork extension and retraction process. Through programming and control systems, the speed, direction and position of the servo motor can be accurately controlled, thereby realizing precise positioning of the fork position.

[0025] like Figure 4As shown, in this embodiment, in order to better transmit the power at the position of the driving mechanism 6 to the position of the fork plate 1 and improve the continuity of the overall movement of the fork, a transition pulley 17 connected to the primary pulley assembly 14 is installed on the surface of the secondary pulley assembly 15, and a fixed wheel 18 connected to the primary pulley assembly 14 is installed on the inner side of the intermediate module 3. Through this implementation, the transition pulley 17 serves as a bridge connecting the primary pulley assembly 14 and the secondary pulley assembly 15, which can ensure efficient transmission of power between the two. By optimizing the design of the transition pulley 17, the energy loss in the transmission process can be reduced and the efficiency of the entire transmission system can be improved. The setting of the fixed wheel 18 enhances the connection stability between the intermediate module 3 and the primary pulley assembly 14. During the transmission process, the fixed wheel 18 can prevent the intermediate module 3 from unnecessary shaking or displacement, thereby ensuring the stability and reliability of the entire fork structure. The setting of the transition pulley 17 and the fixed wheel 18 makes the transmission system more flexible. They can adapt to the transmission requirements in different directions and can adjust the transmission ratio to a certain extent to meet different working conditions.

[0026] like Figure 4 As shown, in this embodiment, in order to enable smoother transmission between the various transmission components, the fixed wheel 18 and the transition pulley 17 are at the same horizontal height and are respectively located on both sides of the transition pulley 17. Through this implementation, it is ensured that the transmission belt (such as a synchronous belt) can smoothly and stably transmit power between them. This design reduces friction and resistance during the transmission process, improves transmission efficiency, and enhances the structural symmetry of the entire transmission system. This symmetry not only improves the aesthetics of the system, but also helps to balance the force conditions during the transmission process, reduce vibration and noise caused by uneven force, and help enhance the stability of the entire transmission system. When subjected to external interference or load changes, this layout can better resist deformation and vibration, ensuring the stable operation of the system.

[0027] like Figure 4As shown, in this embodiment, a toothed mounting plate 19 connected to the top module 2 is installed on the surface of the secondary pulley assembly 15, a connecting plate 20 is installed on the surface of the tertiary pulley assembly 16, the fork plate 1 is connected to the connecting plate 20, and a bearing seat tensioning block 21 is installed at one end of the tertiary pulley assembly 16. Through this implementation, the design of the toothed mounting plate 19 increases the connection area and friction between the secondary pulley assembly 15 and the top module 2, and provides support for the installation and transmission of the tertiary pulley assembly 16, thereby improving the stability of the connection. This design helps to prevent vibration and noise caused by loose connection during transmission. The connecting plate 20 serves as a connecting bridge between the tertiary pulley assembly 16 and the fork plate 1, ensuring that power can be efficiently and smoothly transmitted to the fork plate 1. By optimizing the design of the connecting plate 20, the energy loss in the transmission process can be reduced and the efficiency of the entire transmission system can be improved. The three-stage pulleys can be tensioned and adapted by the bearing seat tensioning block 21 installed on the bearing seat.

[0028] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in this embodiment, a dustproof drag chain 7 connected to the fork plate 1 is installed on the surface of the top module 2, which is used to bear the electrical connection equipment. Through this implementation, it is prevented from contacting the ground, and the dustproof ability of the equipment is improved. The design of the dustproof drag chain 7 first provides effective dustproof protection for the electrical connection equipment. In industrial automation and mechanical equipment, electrical connection equipment is often exposed to a complex and changeable working environment and is easily damaged by pollutants such as dust and debris. The dustproof drag chain 7 can isolate these pollutants to ensure the normal operation of the electrical connection equipment and extend its service life. In industrial automation and mechanical equipment, electrical connection equipment usually requires a large number of cables for connection. The dustproof drag chain 7 can neatly store these cables together and realize flexible movement of the cables through its internal guide structure, which can not only improve the cleanliness and aesthetics of the equipment, but also reduce interference and wear between cables, thereby improving the overall performance of the equipment.

[0029] like Figure 1 , Figure 2 and Figure 6As shown, in this embodiment, a plurality of anti-sliding blocks 8 are installed on the surface of the fork plate 1 and are equidistantly distributed. Through this implementation, the main function of the anti-sliding block 8 is to increase the friction between the fork plate 1 and the transported object, thereby preventing the object from falling due to sliding or shaking during transportation. This design significantly improves the stability and safety of the transport operation, especially when transporting heavy objects or fragile items. Its importance is more evident, and the equidistantly distributed anti-sliding blocks 8 can ensure that the contact area between the fork plate 1 and the transported object is uniform during the transport process, thereby reducing the additional friction and resistance caused by uneven contact. The overall structure adopts aviation aluminum material, which is rust-proof, light weight, and high strength. Compared with traditional telescopic forks, its durability and reliability are improved.

[0030] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in the present embodiment, a protective pad 9 is installed at the front end of the fork plate 1, and a mounting hole 22 is opened through the surface of the bottom module 4. Through this implementation, the fork plate is prevented from colliding with other objects after being extended. The protective pad 9 is usually made of soft and wear-resistant materials, such as rubber, foam plastics, etc. These materials can play a buffering role when the fork plate 1 contacts the transported object, reducing scratches, dents or damage caused by collision or friction. When the fork plate 1 contacts the transported object, the protective pad 9 can play a certain shock-absorbing and sound-isolating role, reducing the noise caused by collision, thereby improving the working environment. The design of the mounting hole 22 makes it easier for the bottom module 4 to be connected and fixed to other components or equipment. For example, the bottom module 4 can be installed on a forklift or other handling equipment by fasteners such as bolts and nuts. The design of the mounting hole 22 also makes the bottom module 4 more convenient and quick when it needs maintenance or replacement. The staff can easily disassemble and replace the damaged bottom module 4 without large-scale disassembly and reorganization of the entire handling system.

[0031] like Figure 3 As shown, in the present embodiment, each guide rail 10 is provided with at least two groups of sliders 11. Through this implementation, the guide rail 10 has more support points in the vertical direction, has good rigidity and load-bearing capacity, and can be equipped with an optional pre-loaded linear guide rail, which can reduce the shaking and vibration of the guide rail during movement, thereby improving the accuracy and smoothness of the movement, and further reducing the gap between the guide rail and the slider itself. The structural parts are installed vertically, with strong vertical load-bearing capacity, improving the transmission accuracy and support strength, and can effectively disperse the pressure on the guide rail 10 and the slider 11.

[0032] Working principle: First, the primary pulley assembly 14 is installed on the bottom module 4, the secondary pulley assembly 15 is installed on the middle module 3, the tertiary pulley assembly 16 is installed on the top module 2, and the fork plate 1 is installed on the top fork plate connecting plate 20. The toothed mounting plate 19 and the top fork plate connecting plate 20 are both installed on the top module 2. The three-stage pulleys can be tensioned by the bearing seat tensioning block 21 installed on the bearing seat. A large and a small pulley are installed on the transition pulley shaft, and two fixed wheels 18 are provided next to the large pulley and on the opposite side of the synchronous belt. The transition pulley 17 shaft and the two idler pulley shafts are all installed on the middle module 3. When the servo motor 12 is started, the primary pulley assembly 14 is driven to move, and the secondary pulley assembly 15 moves at the same time through the transition pulley shaft, thereby driving the tertiary pulley assembly 16 connected by the toothed mounting plate 19 to move, and finally the fork plate 1 located on the top fork plate connecting plate 20 can complete the telescopic action, and at the same time the middle module 3 Under the action of the transition pulley shaft fixed, the top module 2 under the action of the toothed mounting plate 19 can be synchronously extended and retracted with the fork plate 1. When the equipment is running, the PLC first controls the servo motor 12 to start, and the top fork plate 1 is moved to the specified position through the synchronous belt group transmission, and the real-time position of the fork plate 1 is determined by the detection mechanism 5 to achieve precise positioning; after the fork plate 1 reaches the specified position, the PLC controls the relevant actuators to perform cargo storage and retrieval operations. During the cargo storage and retrieval process, the PLC continuously monitors the sensor signal to ensure the safety of the operation. After the cargo storage and retrieval is completed, the fork plate is retracted through the PLC control, the servo motor 12 drive, and the synchronous belt group transmission; when the detection mechanism 5 detects that it is retracted into place, it sends a signal to the PLC. After the PLC receives the arrival signal, the PLC controls the motor to stop and closes the relevant actuators, thereby completing this operation. When it is not needed, the three-level module telescopic fork can be completely retracted to save storage space.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-stage module telescopic fork, characterized in that: include: A fork plate (1) used for taking and placing articles, wherein the lower part of the fork plate (1) is sequentially constructed with a top module (2), a middle module (3) and a bottom module (4) which are detachably connected; The fork plate (1) and the top module (2), the top module (2) and the middle module (3), and the middle module (3) and the bottom module (4) are all connected via guide rails (10) and sliders (11) for increasing the travel of the fork plate (1) and fixing the overall mechanism; A detection mechanism (5), composed of sensors respectively mounted on the fork plate (1) and the top module (2), for detecting the position of the fork plate (1) in real time and providing accurate positioning; A driving mechanism (6) and a transmission component connected to the driving mechanism (6) are installed on the surface of the bottom module (4).

2. A three-stage module telescopic fork according to claim 1, characterized in that: The driving mechanism (6) is composed of a PLC controller, a servo motor (12) and a synchronous belt group, and is used to output power, transmit the power to different modules and the fork plate (1), and is controlled in real time by the PLC controller.

3. A three-stage module telescopic fork according to claim 2, characterized in that: The servo motor (12) is mounted on the surface of the bottom module (4); a coupling (13) is mounted on the output end of the servo motor (12); and the transmission assembly comprises a primary pulley assembly (14) mounted on the inner side of the bottom module (4) and connected to the coupling (13); a secondary pulley assembly (15) mounted on the inner side of the middle module (3); and a tertiary pulley assembly (16) mounted in the top module (2).

4. A three-stage module telescopic fork according to claim 3, characterized in that: A transition pulley (17) connected to the primary pulley assembly (14) is mounted on the surface of the secondary pulley assembly (15), and a fixed pulley (18) connected to the primary pulley assembly (14) is mounted on the inner side of the intermediate module (3).

5. A three-stage module telescopic fork according to claim 4, characterized in that: The fixed wheel (18) and the transition pulley (17) are at the same level and are located on both sides of the transition pulley (17).

6. The three-stage module telescopic fork according to claim 3, characterized in that: A toothed mounting plate (19) connected to the top module (2) is mounted on the surface of the secondary pulley assembly (15), a connecting plate (20) is mounted on the surface of the tertiary pulley assembly (16), the fork plate (1) is connected to the connecting plate (20), and a bearing seat tensioning block (21) is mounted on one end of the tertiary pulley assembly (16).

7. The three-stage module telescopic fork according to claim 1, characterized in that: A dustproof drag chain (7) connected to the fork plate (1) is installed on the surface of the top module (2) and is used to bear the electrical connection equipment.

8. The three-stage module telescopic fork according to claim 1, characterized in that: A plurality of anti-sliding blocks (8) which are arranged at equal distances are installed on the surface of the fork plate (1).

9. The three-stage module telescopic fork according to claim 1, characterized in that: A protective pad (9) is installed at the front end of the fork plate (1), and a mounting hole (22) is provided through the surface of the bottom module (4).

10. The three-stage module telescopic fork according to claim 1, characterized in that: Each guide rail (10) is equipped with at least two sets of sliding blocks (11).

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