Double-extended clamping fork

Abstract

The application discloses a double-stretching clamping type pallet fork, relates to the field of clamping type pallet forks, and solves the problem that the position of the bottom of goods is difficult to be flexibly judged during use of the existing double-stretching clamping type pallet fork, leading to unstable and inefficient supporting and easy damage of the clamping of the sidewall of the goods, and comprises a mounting frame, a stretching mechanism, a clamping mechanism and a supporting mechanism, two groups of bottom forks are arranged on the mounting frame, the stretching mechanism comprises a middle fork and an inner fork, and the supporting mechanism comprises a transmission belt, a supporting frame and a resisting plate. The sliding state of the middle fork and the inner fork is controlled through the stretching mechanism, the two side bottom forks are driven to relatively slide and operate through the clamping mechanism, the goods are clamped on the side of the transmission belt on the inner fork, the goods are upwardly conveyed through the driving of the transmission belt of the supporting mechanism, meanwhile, the position of the outer wall of the goods is sensed through the resisting plate, and after the goods reach the upside of the resisting plate, the supporting frame and the resisting plate are driven to move and support the bottom of the goods quickly, so that the abrasion of the outer wall of the goods is avoided.

Description

Technical Field

[0001] This invention relates to the field of clamping fork technology, specifically a double-extend clamping fork. Background Technology

[0002] In modern logistics warehousing operations, various goods need to be handled and stored. Various automated warehouses have emerged to meet this need. Clamping forks, as a new type of logistics equipment, have enriched warehousing and logistics solutions. Their characteristics include lightweight and simple design, enabling safer and more efficient loading and unloading operations for light-duty containers. Currently, clamping forks on the market primarily use two fork teeth to clamp and secure goods, but the bottom of the goods lacks a supporting structure. If the friction is insufficient when clamping goods, they are prone to falling and breaking.

[0003] The invention patent with publication number CN117416894B discloses a double-extend clamping fork. Through the movement of the supporting component, the pallet is rotated to the bottom of the cargo, thus supporting the cargo and preventing it from falling off. When this structure clamps the cargo on both sides, the position of the cargo and the pallet is relatively fixed. When the bottom of the cargo is below the pallet, the rotation of the pallet cannot directly reach the bottom of the cargo for support. Sometimes, the pallet will rub against and wear the side wall of the cargo during the rotation. At the same time, some existing supporting mechanisms cannot determine the position of the bottom of the cargo. When the driving force is too large, it is easy to cause excessive clamping and dent damage to the side wall of the cargo. Summary of the Invention

[0004] The purpose of this invention is to provide a double-extend clamping fork that facilitates improved stability and flexibility during cargo transport, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a double-extend clamping fork, comprising a mounting frame, a telescopic mechanism, a clamping mechanism, and a supporting mechanism. The mounting frame is provided with two sets of bottom forks. The telescopic mechanism includes two sets of middle forks that are slidably connected horizontally to the sides of the bottom forks on both sides. An inner fork is slidably connected horizontally to the side of each middle fork away from the bottom forks. The telescopic mechanism controls the sliding state of the middle forks and the inner forks. The clamping mechanism is mounted on the mounting frame and drives the bottom forks on both sides to slide relative to each other. The supporting mechanism includes a drive belt mounted on the inner forks, and a supporting frame is provided on the inner forks. An abutment plate is slidably connected within the support frame in the horizontal direction. The support mechanism is used to clamp the goods on the side of the transmission belt on the inner fork, and then drive the transmission belt to transport the goods upward. At the same time, the position of the outer wall of the goods is sensed by the abutment plate, so that when the abutment plate abuts against the outer wall of the goods, the pushing force of the support frame on the goods is reduced. After the goods reach the upper side of the abutment plate, the support frame and the abutment plate are driven to move quickly towards the bottom of the goods to support them. Then, the driving state of the transmission belt is released, and the goods fall back to the upper side of the support frame for support and transportation, which facilitates the improvement of the stability and flexibility of the goods support and transportation process.

[0006] Preferably, the supporting mechanism further includes a device box fixedly installed at one end of the inner fork. A fixed frame is fixedly connected to the bottom of the inner fork. The outer wall of the supporting frame is slidably connected to the inner wall of the fixed frame in a horizontal direction. The outer wall of the abutment plate is slidably connected to the inner wall of the supporting frame in a horizontal direction. A tension spring fixedly connected to one side of the supporting frame is fixedly connected inside the fixed frame. A buffer spring fixedly connected to one side of the abutment plate is fixedly connected inside the supporting frame. The device box is provided with a mechanism for simultaneously driving the transmission belt to move and linking the supporting frame. The drive unit, which moves in conjunction with the contact plate, facilitates the upward transport of goods by driving the transmission belt after the goods are clamped on the side of the transmission belt on the inner fork. Simultaneously, the contact plate senses the position of the outer wall of the goods, reducing the pushing force of the support frame on the goods when the contact plate contacts the outer wall of the goods. After the goods reach the upper side of the contact plate, the support frame and the contact plate are driven to move quickly towards the bottom of the goods for support. Then, the driving state of the transmission belt is released, and the goods fall back to the upper side of the support frame for transport.

[0007] Preferably, the driving component includes two sets of transmission shafts rotatably connected to the device box. The inner wall of the transmission belt is tractively connected to the outer walls of both sets of transmission shafts. A drive gear is coaxially fixedly connected to one end of the upper transmission shaft. A first pipe is provided inside the fixed frame, and a second pipe communicating with the fixed frame is provided inside the support frame. A limit block is fixedly connected to the side of the contact plate. An exhaust pipe communicating with one end of the second pipe is provided on the limit block and the contact plate. The device box is provided with a control component for synchronously inflating the first pipe while driving the drive gear to rotate, so as to facilitate the movement of the support frame and the contact plate simultaneously while driving the transmission belt.

[0008] Preferably, the control component includes a first motor fixedly installed inside the device box. The output end of the first motor is coaxially fixedly connected to a drive disk. A connecting shaft is rotatably connected to a non-central position on the side of the drive disk. A gear disk is rotatably connected to the end of the connecting shaft away from the drive disk. The axis of the gear disk is on the same straight line as the axis of the drive disk. The gear disk meshes with the drive gear. The device box is provided with an inflation component for inflating the first pipe in conjunction with the rotation of the drive disk, so as to simultaneously inflate the first pipe while driving the drive gear to rotate.

[0009] Preferably, the inflation component includes an inflation box fixedly installed inside the device box, an inflation plate slidably connected inside the inflation box, a connecting rod rotatably connected to the inflation plate, the connecting rod rotatably connected to the outer wall of the connecting shaft, a third pipe communicating with the first pipe connected to the inflation box, and an air inlet pipe communicating with the inflation box, so as to facilitate the inflation of the first pipe when the drive disc rotates.

[0010] Preferably, the telescopic mechanism further includes a rotating rod rotatably connected to the mounting frame. A second motor is fixedly connected to the mounting frame, and the output end of the second motor is coaxially fixedly connected to one end of the rotating rod. A gear ring is rotatably connected to the bottom fork. The rotating rod passes through both sides of the bottom fork and the gear ring. A drive groove is provided on the rotating rod to slide with the gear rings on both sides. A rack that meshes with the gear ring is fixedly connected to the bottom of the middle fork. The rack is slidably connected to the outer wall of the bottom fork, which facilitates control of the sliding state of the middle fork and the inner fork.

[0011] Preferably, the clamping mechanism includes a third motor fixedly mounted on the mounting frame. The output end of the third motor is coaxially fixedly connected to a drive rod. The drive rod passes through the two bottom forks on both sides. The drive rod has two sets of threaded grooves, which are threadedly connected to the bottom forks on both sides respectively, so as to facilitate the relative sliding operation of the bottom forks on both sides.

[0012] Preferably, both the air inlet pipe and the third pipe are equipped with one-way valves. The one-way valves are used to control the gas to be drawn into the air inlet pipe from the outside in one direction, then delivered to the inflation box, and finally discharged into the third pipe, so as to facilitate the control of the gas delivery.

[0013] Preferably, the telescopic mechanism further includes an electric telescopic rod fixedly installed on the inner fork, the telescopic end of which is fixedly connected to the middle fork, facilitating control of the inner fork to move, extend, and adjust.

[0014] Preferably, a support plate is fixedly connected to the side of the device box, the outer wall of the support plate is slidably attached to the inner wall of the transmission belt, and the end of the transmission shaft away from the drive gear is rotatably connected to the support plate, which facilitates support for the middle of the transmission belt and improves stability during the clamping and conveying process.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention provides a double-extend clamping fork that solves the problem of existing double-extend clamping forks having difficulty in flexibly judging the position of the bottom of the cargo, resulting in an unstable and inefficient supporting process and easy damage to the side walls of the cargo. The invention controls the sliding state of the middle and inner forks through a telescopic mechanism, and drives the two bottom forks to slide relative to each other through a clamping mechanism. After the cargo is clamped on the side of the drive belt on the inner fork, the supporting mechanism drives the drive belt to transport the cargo upwards. Simultaneously, the contact plate senses the position of the outer wall of the cargo, reducing the pushing force of the supporting frame on the cargo when the contact plate contacts the outer wall. After the cargo reaches the upper part of the contact plate, the supporting frame and contact plate are driven to quickly move towards the bottom of the cargo for support. Then, the drive of the drive belt is released, and the cargo falls back to the upper part of the supporting frame for transport. This improves the adaptability and stability of the clamping and supporting process and avoids damage to the side walls of the cargo. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a partial structural diagram of the clamping mechanism of the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of region A in the middle;

[0020] Figure 4 This is an exploded view of a portion of the telescopic mechanism of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of region B in the middle;

[0022] Figure 6 This is a schematic diagram of the internal structure of the device box of the present invention;

[0023] Figure 7 for Figure 6 Enlarged view of region C;

[0024] Figure 8 This is a partial structural cross-sectional view of the inflatable component of the present invention;

[0025] Figure 9 for Figure 8 Enlarged view of region D in the middle;

[0026] Figure 10 This is a partial structural diagram of the support mechanism of the present invention;

[0027] Figure 11 This is a partial structural cross-sectional view of the support mechanism of the present invention;

[0028] Figure 12 for Figure 11 Enlarged view of region E in the middle.

[0029] In the diagram: 1. Mounting frame; 2. Bottom fork; 3. Middle fork; 4. Inner fork; 5. Drive belt; 6. Support frame; 7. Contact plate; 8. Device box; 9. Fixing frame; 10. Tension spring; 11. Buffer spring; 12. Drive shaft; 13. Drive gear; 14. First pipe; 15. Second pipe; 16. Limit block; 17. Exhaust pipe; 18. First motor; 19. Drive disc; 20. Connecting shaft; 21. Gear disc; 22. Inflation box; 23. Inflation plate; 24. Connecting rod; 25. Third pipe; 26. Intake pipe; 27. Rotating rod; 28. Second motor; 29. ​​Gear ring; 30. Drive groove; 31. Rack; 32. Third motor; 33. Drive rod; 34. Threaded groove; 35. One-way valve; 36. Electric telescopic rod; 37. Support plate. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1-12The diagram shows a double-extend clamping fork, comprising a mounting frame 1, a telescopic mechanism, a clamping mechanism, and a supporting mechanism. The mounting frame 1 has two sets of bottom forks 2. The telescopic mechanism includes two sets of middle forks 3 that are horizontally slidably connected to the sides of the bottom forks 2. An inner fork 4 is horizontally slidably connected to the side of the middle fork 3 furthest from the bottom forks 2. The telescopic mechanism controls the sliding state of the middle forks 3 and the inner forks 4. The clamping mechanism is mounted on the mounting frame 1 and drives the bottom forks 2 to slide relative to each other. The supporting mechanism includes a drive belt 5 mounted on the inner fork 4, and the inner fork 4 has a support... The support frame 6 has a horizontally slidable contact plate 7 inside it. The support mechanism is used to clamp the goods on the side of the transmission belt 5 on the inner fork 4, and then drive the transmission belt 5 to transport the goods upward. At the same time, the contact plate 7 senses the position of the outer wall of the goods, so that when the contact plate 7 abuts against the outer wall of the goods, the pushing force of the support frame 6 on the goods is reduced. After the goods reach the upper side of the contact plate 7, the support frame 6 and the contact plate 7 are driven to move quickly to the bottom of the goods to support them. Then the driving state of the transmission belt 5 is released, and the goods fall back to the upper side of the support frame 6 for support and transportation.

[0032] The supporting mechanism also includes a device box 8 fixedly installed at one end of the inner fork 4. A fixed frame 9 is fixedly connected to the bottom of the inner fork 4. The outer wall of the supporting frame 6 is slidably connected to the inner wall of the fixed frame 9 in the horizontal direction. The outer wall of the contact plate 7 is slidably connected to the inner wall of the supporting frame 6 in the horizontal direction. A tension spring 10 is fixedly connected to one side of the supporting frame 6 in the fixed frame 9. A buffer spring 11 is fixedly connected to one side of the contact plate 7 in the supporting frame 6. The device box 8 is provided with a driving component for moving the supporting frame 6 and the contact plate 7 in conjunction with the drive belt 5.

[0033] The driving component includes two sets of drive shafts 12 rotatably connected to the device box 8. The inner wall of the drive belt 5 is rotatably connected to the outer wall of the two sets of drive shafts 12. A support plate 37 is fixedly connected to the side of the device box 8. The outer wall of the support plate 37 slides against the inner wall of the drive belt 5. The end of the drive shaft 12 away from the drive gear 13 is rotatably connected to the support plate 37. The drive gear 13 is coaxially fixedly connected to one end of the drive shaft 12 located on the upper side. A first pipe 14 is opened in the fixed frame 9. A second pipe 15 connected to the fixed frame 9 is opened in the support frame 6. A limit block 16 is fixedly connected to the side of the contact plate 7. An exhaust pipe 17 that can be connected to one end of the second pipe 15 is opened on the limit block 16 and the contact plate 7. A control component is provided in the device box 8 for synchronously inflating the first pipe 14 during the rotation of the drive gear 13.

[0034] The control components include a first motor 18 fixedly installed in the device box 8. The first motor 18 is preferably an LD60 micro motor. The output end of the first motor 18 is coaxially fixedly connected to a drive disk 19. A connecting shaft 20 is rotatably connected to the side of the drive disk 19 at a non-center position. A gear disk 21 is rotatably connected to the end of the connecting shaft 20 away from the drive disk 19. The axis of the gear disk 21 is on the same straight line as the axis of the drive disk 19. The gear disk 21 meshes with the drive gear 13. The device box 8 is provided with an inflation component for inflating the first pipe 14 in conjunction with the rotation of the drive disk 19.

[0035] The inflation component includes an inflation box 22 fixedly installed in the device box 8. An inflation plate 23 is slidably connected inside the inflation box 22. A connecting rod 24 is rotatably connected to the inflation plate 23. The connecting rod 24 is rotatably connected to the outer wall of the connecting shaft 20. A third pipe 25 connected to the first pipe 14 is connected to the inflation box 22. An air inlet pipe 26 is connected to the inflation box 22. Both the air inlet pipe 26 and the third pipe 25 contain one-way valves 35. The one-way valves 35 are used to control the gas to be drawn into the air inlet pipe 26 from the outside, then delivered to the inflation box 22, and finally discharged into the third pipe 25.

[0036] In this embodiment, the telescopic mechanism and the clamping mechanism control the extension and retraction of the middle fork 3 and the inner fork 4 for clamping. During the clamping process, the transmission belt 5 on the inner fork 4 will abut against the side wall of the goods. Since the position of one end of the contact plate 7 is closer to the goods than the surface of the transmission belt 5 in the initial state, during the clamping process, one end of the contact plate 7 will abut against the side wall of the goods and push the contact plate 7 into the support frame 6, compressing the buffer spring 11. At this time, the exhaust pipe 17 slides to the position connected to the second pipe 15, and the first motor 18 is started to drive the drive disk 19 to rotate, thereby causing the connecting shaft 20 to drive the gear disk 21 to rotate. The gear disk 21 drives the drive gear 13 to make the transmission shaft 12 rotate, which in turn drives the transmission belt 5 to rotate, slowly conveying the goods upward.

[0037] During the rotation of the connecting shaft 20 and the connecting rod 24, the inflation plate 23 is driven to move in a piston motion within the inflation box 22, drawing in external air through the air inlet pipe 26 and then compressing and expelling it into the third pipe 25. The gas is then transported to the fixed frame 9 through the first pipe 14. Since the second pipe 15 is connected to the exhaust pipe 17 at this time, the inflated gas is directly discharged to the outside through the second pipe 15 and the exhaust pipe 17, preventing the air pressure inside the fixed frame 9 from increasing. This avoids the support frame 6 and the contact plate 7 from continuously increasing the clamping force on both sides of the goods. When the goods are driven upward by the transmission belt 5 to the set position, one end of the contact plate 7 is released from contact with the fixed frame 9. When the outer wall of the goods comes into contact with the air, the buffer spring 11 rebounds, causing the exhaust pipe 17 to disconnect from the second pipe 15. At this time, the first pipe 14 continues to inflate, which increases the air pressure inside the fixed frame 9. The support frame 6 gradually slides to the bottom of the goods, and the tension spring 10 stretches. Meanwhile, the goods continue to slide upward. When the air pressure inside the fixed frame 9 reaches the set value, it indicates that the support frame 6 has moved to the required length. After that, the operation of the first motor 18 stops, and the goods slide downward with the transmission belt 5. The goods fall back to the top of the support frame 6 for support. At this time, the gas inside the fixed frame 9 will not be discharged to the outside, so that the support frame 6 always maintains the support state.

[0038] Once the goods are transported to the designated position, the inner forks 4 on both sides slide open to the sides, allowing the goods to be placed in the desired position. During the subsequent clamping process, the inner forks 4 move closer to the sides of the goods, causing the contact plate 7 to contact the goods again, compressing the buffer spring 11, and connecting the second pipe 15 to the exhaust pipe 17 again, allowing the gas in the fixed frame 9 to be discharged to the outside through the exhaust pipe 17. The tension spring 10 pulls the support frame 6 to slide in the opposite direction into the fixed frame 9, finally causing the transmission belt 5 to contact the side wall of the goods, thus completing the clamping function again. Repeating the above steps can continuously support and transport goods, improving the stability of goods transportation.

[0039] It is worth noting that: the first motor 18 can be directly installed on the device box 8 to increase the torque so that the transmission belt 5 can slowly convey goods, thereby improving the stability and conveying force during the conveying process. Alternatively, a higher power motor can be installed on the mounting frame 1, and the rotation state of the drive disc 19 can be controlled through the corresponding transmission structure to increase the driving force during the lifting and lowering of goods.

[0040] Example 2: Please refer to Figures 1-5This embodiment further illustrates Embodiment 1. The telescopic mechanism shown in the figure also includes a rotating rod 27 rotatably connected to the mounting frame 1. A second motor 28 is fixedly connected to the mounting frame 1. The second motor 28 is preferably a YYHS-40. The output end of the second motor 28 is coaxially fixedly connected to one end of the rotating rod 27. A gear ring 29 is rotatably connected to the bottom fork 2. The rotating rod 27 passes through the bottom forks 2 on both sides and the gear ring 29. A drive groove 30 is provided on the rotating rod 27 that is slidably connected to the gear rings 29 on both sides. A rack 31 that meshes with the gear ring 29 is fixedly connected to the bottom of the middle fork 3. The rack 31 is slidably connected to the outer wall of the bottom fork 2. The telescopic mechanism also includes an electric telescopic rod 36 fixedly installed on the inner fork 4. The telescopic end of the electric telescopic rod 36 is fixedly connected to the middle fork 3.

[0041] In this embodiment, the second motor 28 drives the rotating rod 27 to rotate, which in turn causes the drive groove 30 to drive the gear ring 29 to rotate. The gear ring 29 drives the rack 31 to slide against the middle fork 3, thereby controlling the sliding extension and retraction of the middle fork 3. The sliding state of the inner fork 4 can be controlled by the extension and retraction of the electric telescopic rod 36. The extension and retraction methods are diverse, and other similar structures can also be used for control and drive. By setting the gear ring 29, it is ensured that the drive groove 30 can always drive the gear ring 29 to rotate during the horizontal sliding clamping of the bottom fork 2, thus improving the stability of operation.

[0042] Example 3: Please refer to Figures 1-3 This embodiment further illustrates Embodiment 1. The clamping mechanism shown in the figure includes a third motor 32 fixedly installed on the mounting frame 1. The third motor 32 is preferably a YYHS-40. The output end of the third motor 32 is coaxially fixedly connected to a drive rod 33. The drive rod 33 passes through the bottom forks 2 on both sides. Two sets of threaded grooves 34 are provided on the drive rod 33. The two sets of threaded grooves 34 are threadedly connected to the bottom forks 2 on both sides respectively.

[0043] In this embodiment, the third motor 32 drives the drive rod 33 to rotate, thereby causing the threaded groove 34 to synchronously drive the bottom forks 2 on both sides to open and close. The adjustment process is more stable, and the limit can be set at any time. The clamping and conveying process is also more stable and efficient.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-extend clamping forklift, characterized in that, include: Mounting frame (1), the mounting frame (1) is provided with two sets of bottom forks (2); Also includes: The telescopic mechanism includes two sets of middle forks (3) that are slidably connected to the sides of the bottom forks (2) on both sides in the horizontal direction. The middle forks (3) are slidably connected to an inner fork (4) on the side away from the bottom forks (2) in the horizontal direction. The telescopic mechanism is used to control the sliding state of the middle forks (3) and the inner forks (4). A clamping mechanism is mounted on the mounting frame (1) and is used to drive the bottom forks (2) on both sides to slide relative to each other. The supporting mechanism includes a transmission belt (5) mounted on the inner fork (4), a supporting frame (6) on the inner fork (4), and an abutment plate (7) slidably connected in the horizontal direction inside the supporting frame (6). The supporting mechanism is used to clamp the cargo on the side of the transmission belt (5) on the inner fork (4), drive the transmission belt (5) to convey the cargo upwards, and simultaneously sense the position of the outer wall of the cargo through the abutment plate (7). This reduces the pushing force of the supporting frame (6) on the cargo when the abutment plate (7) contacts the outer wall of the cargo. After the cargo reaches the upper side of the abutment plate (7), the supporting frame (6) and the abutment plate (7) are driven to quickly move towards the bottom of the cargo to support it. The mechanism also includes a device box (8) fixedly installed at one end of the inner fork (4). A fixed frame (9) is fixedly connected to the bottom of the inner fork (4). The outer wall of the support frame (6) is slidably connected to the inner wall of the fixed frame (9) in the horizontal direction. The outer wall of the abutment plate (7) is slidably connected to the inner wall of the support frame (6) in the horizontal direction. A tension spring (10) is fixedly connected to one side of the support frame (6) in the fixed frame (9). A buffer spring (11) is fixedly connected to one side of the abutment plate (7) in the support frame (6). The device box (8) is provided with a driving component for moving the support frame (6) and the abutment plate (7) in conjunction with the drive belt (5) while driving the drive belt (5) to run.

2. The double-extend clamping forklift according to claim 1, characterized in that: The driving component includes two sets of transmission shafts (12) rotatably connected to the device box (8). The inner wall of the transmission belt (5) is connected to the outer wall of the two sets of transmission shafts (12). One end of the transmission shaft (12) located on the upper side is coaxially fixedly connected to a driving gear (13). A first pipe (14) is provided in the fixed frame (9). A second pipe (15) connected to the fixed frame (9) is provided in the support frame (6). A limit block (16) is fixedly connected to the side of the contact plate (7). An exhaust pipe (17) that can be connected to one end of the second pipe (15) is provided on the limit block (16) and the contact plate (7). A control component is provided in the device box (8) for synchronously inflating the first pipe (14) during the rotation of the driving gear (13).

3. A double-extending clamping fork according to claim 2, characterized in that: The control unit includes a first motor (18) fixedly installed in the device box (8). The output end of the first motor (18) is coaxially fixedly connected to a drive disk (19). A connecting shaft (20) is rotatably connected to the side of the drive disk (19) at a non-center position. A gear disk (21) is rotatably connected to the end of the connecting shaft (20) away from the drive disk (19). The axis of the gear disk (21) is on the same straight line as the axis of the drive disk (19). The gear disk (21) meshes with the drive gear (13). The device box (8) is provided with an inflation component for inflating the first pipe (14) in conjunction with the rotation of the drive disk (19).

4. A double-extending clamping fork according to claim 3, characterized in that: The inflation component includes an inflation box (22) fixedly installed inside the device box (8), an inflation plate (23) slidably connected inside the inflation box (22), a connecting rod (24) rotatably connected to the inflation plate (23), the connecting rod (24) rotatably connected to the outer wall of the connecting shaft (20), a third pipe (25) connected to the first pipe (14) is connected to the inflation box (22), and an air inlet pipe (26) is connected to the inflation box (22).

5. A double-extending clamping fork according to claim 1, characterized in that: The telescopic mechanism also includes a rotating rod (27) rotatably connected to the mounting frame (1). A second motor (28) is fixedly connected to the mounting frame (1). The output end of the second motor (28) is coaxially fixedly connected to one end of the rotating rod (27). A gear ring (29) is rotatably connected to the bottom fork (2). The rotating rod (27) passes through the bottom fork (2) and the gear ring (29) on both sides. A drive groove (30) is provided on the rotating rod (27) and is slidably connected to the gear rings (29) on both sides. A rack (31) that meshes with the gear ring (29) is fixedly connected to the bottom of the middle fork (3). The rack (31) is slidably connected to the outer wall of the bottom fork (2).

6. A double-extend clamping fork according to claim 1, characterized in that: The clamping mechanism includes a third motor (32) fixedly installed on the mounting frame (1). The output end of the third motor (32) is coaxially fixedly connected to a drive rod (33). The drive rod (33) passes through the bottom forks (2) on both sides. The drive rod (33) has two sets of threaded grooves (34), and the two sets of threaded grooves (34) are threadedly connected to the bottom forks (2) on both sides respectively.

7. A double-extending clamping fork according to claim 4, characterized in that: Both the air inlet pipe (26) and the third pipe (25) contain one-way valves (35). The one-way valves (35) are used to control the gas to be drawn into the air inlet pipe (26) from the outside in one direction, then delivered to the air filling box (22), and finally discharged into the third pipe (25).

8. A double-extending clamping fork according to claim 1, characterized in that: The telescopic mechanism also includes an electric telescopic rod (36) fixedly installed on the inner fork (4), and the telescopic end of the electric telescopic rod (36) is fixedly connected to the middle fork (3).

9. A double-extending clamping fork according to claim 2, characterized in that: A support plate (37) is fixedly connected to the side of the device box (8). The outer wall of the support plate (37) slides against the inner wall of the transmission belt (5). The end of the transmission shaft (12) away from the drive gear (13) is rotatably connected to the support plate (37).

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