Clamping telescopic mechanism for large cylindrical battery production materials

Abstract

The invention relates to a clamping telescopic mechanism for large cylindrical battery production materials, and belongs to the technical field of battery production material transfer equipment. The clamping telescopic mechanism comprises a chassis, two fixed arms are slidably arranged on the chassis, and the opposite sides of the two fixed arms are slidably connected with first telescopic arms; the opposite sides of the two first telescopic arms are slidably connected with second telescopic arms, and synchronous belt transmission assemblies are arranged on the first telescopic arms; each second telescopic arm is provided with a driving piece, the driving piece is connected with a deflector rod, the opposite sides of the two second telescopic arms are provided with limiting plates, and the deflector rods are arranged close to the extending ends of the second telescopic arms compared with the limiting plates; a clamping assembly is installed on the chassis, a supporting assembly is further installed on the chassis, the supporting assembly is located between the two fixing arms, and the supporting assembly is used for supporting a tray. The telescopic pallet fork has the effects that the adaptability of the telescopic pallet fork to trays with different heights is improved, and stability and reliability are kept in the heavy-load transfer process.

Description

Technical Field

[0001] This application relates to the field of battery production material transfer equipment technology, and in particular to a clamping and telescopic mechanism for large cylindrical battery production materials. Background Technology

[0002] In the production and testing of lithium batteries, pallets filled with batteries typically need to be moved between different processes. For example, during the battery charging and discharging stage, the pallet needs to be removed from the previous process station by a stacker crane and placed in different storage locations of the charging and discharging equipment for processing; after charging and discharging are completed, the pallet needs to be transferred by the stacker crane to the next process station. In this process, the transfer of pallets between the receiving station, the stacker crane loading platform, and the charging and discharging equipment generally relies on the telescopic forks mounted on the stacker crane.

[0003] In the prior art, multi-stage synchronous telescopic fork structures are quite common, and their telescopic arms are usually arranged in a vertically stacked and sliding configuration. For example, patent documents CN220886907U and CN101885456A disclose a typical solution. This type of structure can achieve pallet transfer during telescopic movement.

[0004] However, because the telescopic arms are stacked vertically, the final extended telescopic arm is usually positioned too high, making it difficult to meet the needs of clamping and transferring pallets with lower height. While adding connecting rods or frames to the final telescopic arm to accommodate lower pallets and lower the lever position can solve the height compatibility problem to some extent, the connecting rods / frames are prone to deformation due to the large torque when transferring heavy-duty pallets filled with large cylindrical lithium batteries. Significant deformation of the connecting structure can cause misalignment of the lever, resulting in the pallet not being fully transferred after the telescopic arm is fully retracted. This can lead to interference between the pallet and the automated storage and retrieval system's operating mechanism, and can also trigger a series of component failures, resulting in operational risks and a high failure rate. Therefore, the existing clamping telescopic fork structure has poor adaptability and cannot meet the needs of transferring large cylindrical battery production materials. Summary of the Invention

[0005] In order to improve the adaptability of telescopic forks to pallets of different heights and maintain stability and reliability during heavy-duty transport, this application provides a clamping telescopic mechanism for large cylindrical battery production materials.

[0006] The technical solution provided in this application for a clamping and telescopic mechanism for large cylindrical battery production materials is as follows: A clamping and telescopic mechanism for large cylindrical battery production materials includes a chassis. Two fixed arms are slidably disposed on the chassis. A first telescopic arm is slidably connected to one side of each of the two fixed arms. A second telescopic arm is slidably connected to one side of each of the two first telescopic arms. A synchronous belt drive assembly is disposed on the first telescopic arm. The first telescopic arm is driven to move by a first drive assembly, thereby driving the synchronous belt drive assembly to move, which in turn causes the synchronous belt drive assembly to drive the second telescopic arm to move. The second telescopic arm is provided with a driving component, and the driving component is connected to a lever. The driving component controls the lever to rotate. Each of the two second telescopic arms is provided with a limit plate on an opposite side. The lever is positioned closer to the extended end of the second telescopic arm than the limit plate. A clamping assembly is installed on the chassis, which is used to drive the two fixed arms to move relative to each other. A support assembly is also installed on the chassis, which is located between the two fixed arms and is used to support the pallet.

[0007] By adopting the above technical solution, the clamping assembly controls the relative movement of the two fixed arms, causing the first telescopic arm and the second telescopic arm to open. Then, the first drive assembly and the synchronous belt drive assembly cooperate to enable the first telescopic arm and the second telescopic arm to achieve multi-stage synchronous extension and retraction. Then, the drive unit drives the lever to rotate to be perpendicular to the second telescopic arm. Then, the clamping assembly controls the two second telescopic arms to move closer to each other and hug the tray. The first telescopic arm and the second telescopic arm then retract. The lever pushes the tray to move onto the support assembly, completing the clamping operation.

[0008] When it is necessary to send the pallet out, the lever is rotated to be parallel to the second telescopic arm. Then the first drive assembly drives the first and second telescopic arms to extend. After the limit plate pushes the pallet into the warehouse, the two second telescopic arms move away from each other. Then the first and second telescopic arms reset.

[0009] The fixed arm, the first telescopic arm, and the second telescopic arm are arranged in a horizontal direction, which allows the second telescopic arm to have a larger height range. The lever can be directly installed at different height positions, so that it can be adapted to trays of different heights without the need for additional connecting rods or connecting frames, thus improving the adaptability of the device.

[0010] By preventing the connecting rod / frame from deforming under heavy-load pallet conditions due to torque, and preventing pallet transfer problems caused by lever misalignment, the risk of interference and failure rate during equipment operation is reduced, thereby improving the overall reliability of operation.

[0011] The first telescopic arm, in conjunction with the synchronous belt drive assembly, enables the coordinated extension and retraction of each telescopic arm. Compared with the traditional chain drive method, it has the advantages of being less prone to breakage, having high transmission accuracy, and running smoothly, thus ensuring the synchronization and reliability of clamping and transfer actions.

[0012] The support components on the chassis provide support for the pallet between the two fixed arms, enhancing the support and stability of the heavy-duty pallet filled with large cylindrical lithium batteries and preventing the pallet from sinking or shifting during transportation.

[0013] Optionally, the second telescopic arm is an inverted plate, the driving component is installed inside the second telescopic arm, and the lever can be flipped to be perpendicular to the second telescopic arm; The synchronous belt drive assembly includes a first synchronous pulley and a second synchronous pulley. The first synchronous pulley is rotatably connected to the first telescopic arm. A first fixed block is installed on the first telescopic arm, and a sliding block is provided on the first telescopic arm. The second synchronous pulley is rotatably connected to the sliding block. A first adjusting bolt group is threaded onto the first fixed block, and the first adjusting bolt group abuts against the sliding block. A synchronous conveyor belt is wound around both the first and second synchronous pulleys. The synchronous conveyor belt is taut. Clamping plates are provided on both the fixed plate and the second telescopic arm, and the clamping plates clamp the synchronous conveyor belt.

[0014] By adopting the above technical solution, the second telescopic arm adopts a C-shaped plate structure, forming a large internal installation space between the first telescopic arm and the second telescopic arm, which facilitates the arrangement and installation of drive components and related circuits, and helps to reduce the space occupation of the overall device and improve the integration. Synchronous belt drives replace traditional chain drives, avoiding the problem of chain breakage, significantly reducing equipment failure rate, and improving the stability of the production process. They also have the advantages of high positioning accuracy, high transmission efficiency, fast response speed, smooth operation and high reliability. Furthermore, the material properties of synchronous belts can provide a certain buffering effect and improve the smoothness of operation. After adjusting the position of the sliding block by means of the first adjusting bolt group, the sliding block is then fixed on the first telescopic arm, thereby achieving precise adjustment of the position of the second synchronous pulley, ensuring that the synchronous conveyor belt is always taut, avoiding transmission slippage or decrease in accuracy due to slack, and further improving the reliability of system operation.

[0015] Optionally, the fixed arm is connected to a support base, the support base is slidably connected to the chassis, the first drive assembly includes a motor mounting plate, a first drive motor is mounted on the motor mounting plate, the first drive motor is connected to a first gear, the first telescopic arm is provided with a rack along its length direction, the rack meshes with the first gear, a torque bracket is also connected to the first drive motor, the torque bracket is connected to a support rod, and the support rod is fixed to the motor mounting plate.

[0016] By adopting the above technical solution, the first drive motor is fixed on the support seat of the fixed arm through the motor mounting plate, so that the drive assembly and the telescopic arm as a whole are kept on the same installation reference. This can reduce the positional deviation caused by ground installation errors and inconsistent references, which is conducive to improving the transmission accuracy between the drive and the telescopic arm. At the same time, it also reduces the space occupied by the whole machine and makes the structure more compact. A torsion bracket is installed on the first drive motor and fixed to the motor mounting plate by a support rod. This can offset the axial clearance or torsional deformation caused by installation and machining errors during motor operation, ensure the meshing stability of the gear and rack, and avoid vibration, impact and precision reduction caused by excessive meshing clearance, thereby extending the service life of the drive assembly and telescopic arm.

[0017] Optionally, at least two clamping blocks are provided on the motor mounting plate, a support plate is fixedly connected to the support base, and a positioning bolt is provided through the support plate and the adjusting block. The positioning bolt is threaded with two clamping nuts. One clamping nut clamps the top of the clamping block, and the other clamping nut clamps the washer of the positioning bolt, so that the positioning bolt is fixed to the support plate. A buffer pad is sleeved on the support rod, and the buffer pad abuts against the torsion bracket.

[0018] By adopting the above technical solution, the tightening bolts press the motor mounting plate, effectively limiting the deformation or displacement of the motor mounting plate during operation, thereby maintaining stable meshing between the motor, gear and rack, further eliminating gaps during operation, improving transmission accuracy and stability, and setting a buffer pad between the support rod and the torsion bracket so that the clamping force of the positioning bolts does not act directly on the support rod, avoiding deformation of the support rod due to long-term stress.

[0019] Optionally, a first sensor is provided at the end of the fixed arm away from the lever and at the middle area of ​​the fixed arm. A first sensing plate is provided on the first telescopic arm. When the first sensor senses the first sensing plate, the drive assembly stops operating. Limit blocks are installed at both ends of the fixed arm and the first telescopic arm.

[0020] By adopting the above technical solution, the cooperation between the first sensor and the first sensing sheet can realize real-time detection and automatic control limit of the operating position of the first telescopic arm, thereby ensuring the accuracy and safety of the telescopic action. When the first sensor malfunctions or fails to detect, the limit blocks set at both ends of the fixed arm and the first telescopic arm can provide mechanical secondary limit, preventing the telescopic arm from continuing to operate and causing structural interference or damage, thus improving the reliability and safety redundancy of the system operation.

[0021] Optionally, the limiting plate is an L-shaped block with an oblong hole. The limiting plate is bolted to the second telescopic arm through the oblong hole. A second fixing block is installed on the second telescopic arm. The second fixing block is connected to a second adjusting bolt group, and the second adjusting bolt group abuts against the limiting plate. The second telescopic arm is also provided with an auxiliary gripper. When the lever and the second telescopic arm abut against the tray together, the ribs of the tray are inserted into the auxiliary gripper. The drive unit includes a servo motor, which has a built-in angle encoder.

[0022] By adopting the above technical solution, the cooperation between the second adjusting bolt group and the waist-shaped hole allows the installation position of the limiting plate to be flexibly adjusted, thereby adapting to trays of different lengths and improving the versatility and adaptability of the device. The auxiliary gripper and the lever work together. When the pallet's stiffener is inserted into the auxiliary gripper, the pallet can still be moved even if the lever breaks under force or the drive component fails, thus improving the stability and safety of the equipment operation. The use of an angle encoder on a servo motor enables motion control at any angle and process speed control.

[0023] Optionally, the clamping assembly includes a through-shaft motor and a bidirectional lead screw. The through-shaft motor is mounted on the chassis and located between two support seats. The bidirectional lead screw passes through the through-shaft motor and is drivenly connected to the output end of the through-shaft motor. The bidirectional lead screw is rotatably connected to the chassis. The support seats are connected to nut seats, and the nut seats are threadedly connected to the bidirectional lead screw. Two sets of second sensors are provided on the base near the support seats, with a gap between the two sets of second sensors. The support seats are connected to second sensing plates. When the second sensors sense the second sensing plates, the through-shaft motor stops operating.

[0024] By adopting the above technical solution, a through-shaft motor is used and arranged between two support seats, so that the bidirectional lead screw can directly pass through the motor and be connected to its output end for transmission. While ensuring the reliability of the clamping action, the size of the mechanism in the width direction is effectively reduced, thereby reducing the overall space occupancy rate of the equipment and improving the compactness of the layout. The movement positions of the two supports can be independently detected and controlled, achieving precise control of the clamping stroke.

[0025] Optionally, the support assembly includes two mounting brackets, which are mounted on the chassis. The two mounting brackets are hinged together with a plurality of support rollers, which are arranged along the extension direction of the second telescopic arm and are perpendicular to the second telescopic arm. The mounting frame is equipped with two sets of in-situ detection sensors, one of which is located near the discharge end of the second telescopic arm. Another set of in-situ detection sensors is disposed near the limiting plate and between the limiting plate and the lever. The in-situ detection sensors are used to sense whether there is a tray on the support roller. At least one of the mounting brackets is equipped with a storage location detection sensor, which is used to identify whether there is a pallet in the storage room in front of it, and the storage location detection sensor is tilted towards the center line of the chassis.

[0026] By adopting the above technical solution, the in-situ detection sensor and the absolute encoder that can drive the first motor can be used together to form a closed-loop control system. By combining the warehouse location detection sensor and the in-situ detection sensor, the status of the pallet in the warehouse and equipment can be accurately confirmed, and the position of the pallet during the transfer process can be monitored and corrected in real time, so as to make the pallet positioning and limit control more accurate and stable. Two sets of in-situ sensors are respectively arranged at the discharge end of the second telescopic arm and between the limit plate and the lever, which can realize multi-point detection of the pallet on the support roller, and further improve the pallet's status recognition capability in the equipment. The storage location detection sensor can detect the storage location in front of it. When a pallet is detected in the storage location, it can effectively prevent the equipment from performing invalid actions or causing pallet stacking interference, thereby ensuring the safety and reliability of the system operation.

[0027] Optionally, the second telescopic arm is provided with a folding component, the folding component is connected to a curtain, and the second telescopic arm is provided with a linkage, the linkage being connected to the drive component; When the drive unit controls the lever to rotate to be perpendicular to the second telescopic arm, the drive unit controls the linkage to drive the folding assembly to be in a fully unfolded state, and the folding assembly drives the curtain to unfold, with the two curtains together covering the top of the tray.

[0028] By adopting the above technical solution, the driving component, while rotating the lever, can also drive the folding assembly through the linkage, causing the shielding curtains to automatically unfold as the lever flips to the vertical position. This ensures that the top of the tray is covered by the shielding curtains on both sides during tray handling and transfer, preventing dust and foreign objects from falling in. This structure utilizes the linkage between the lever rotation and the shielding curtain unfolding to achieve automatic protection without additional driving components. This not only improves the system's automation level and integrated design but also effectively reduces the risk of contamination of the battery tray during transfer and temporary storage, ensuring the safety and stability of the battery production process.

[0029] Optionally, the driving component is a second driving motor, which is mounted on the second telescopic arm. The linkage includes a first rotating shaft, the second driving motor is connected to the first rotating shaft, the first rotating shaft is connected to the lever, and a second rotating shaft is rotatably connected to the second telescopic arm. The first rotating shaft and the second rotating shaft are connected by a gear set so that the first rotating shaft and the second rotating shaft rotate in the same direction. The folding component is disposed on the second rotating shaft. The folding assembly includes several first links, which are divided into two groups with the same number of links in each group. The first links in the same group are connected sequentially. The adjacent ends of two adjacent first links are connected by Z-shaped blocks. Each of the two first links is hinged to a turning area of ​​the Z-shaped block. Furthermore, a second gear is fixedly provided at the adjacent ends of two adjacent first links. Two adjacent second gears mesh with each other. The adjacent ends of two adjacent Z-shaped blocks are hinged together by a second link. One end of the first connecting rod adjacent to the second telescopic arm is fixedly set to the second rotating shaft, and a third connecting rod is also hinged to the second telescopic arm, the other end of the third connecting rod being hinged to the end of the adjacent Z-shaped block; The second link corresponds to the first link one by one and is parallel to it; the third link is parallel to the first link adjacent to the second telescopic arm. The third connecting rod is provided with guide posts at one end near the second telescopic arm, at the middle of the Z-shaped block, and at the end of the first connecting rod away from the second telescopic arm. The guide posts of the two sets of first connecting rods correspond one-to-one, and the two sides of the curtain are fitted onto multiple guide posts on the same side.

[0030] By adopting the above technical solution, the second drive motor controls the first rotating shaft to rotate, and the first rotating shaft drives the second rotating shaft to rotate in the same direction through the gear set. As the lever flips perpendicular to the second telescopic arm, several first connecting rods flip synchronously. Under the combined action of the second gear, the second connecting rod and the third connecting rod, several first connecting rods gradually unfold, so that the curtain unfolds to cover the tray. This structural design allows for adjustment of the length and number of the first link according to the height requirements of the second telescopic arm, ensuring that the first link does not affect the extension of the second telescopic arm into the warehouse when it is retracted. Furthermore, depending on the width of the pallet, a corresponding number of first links can be added and different widths of shielding curtains can be replaced to ensure complete coverage of pallets with different width requirements, thus improving the equipment's adaptability to various pallet specifications.

[0031] In summary, this application includes at least one of the following beneficial technical effects: 1. The fixed arm, the first telescopic arm, and the second telescopic arm are arranged in a horizontal direction, which gives the second telescopic arm a wider height range. The lever can be directly installed at different height positions, so that it can adapt to pallets of different heights without the need for additional connecting rods or connecting frames, thus improving the adaptability of the device. By avoiding the deformation of the connecting rod / frame due to torque under heavy pallet conditions, the problem of pallet transfer failure caused by lever misalignment is prevented, thereby reducing the risk of interference and failure rate during equipment operation and improving the overall reliability of operation. 2. Synchronous belt drives replace traditional chain drives, avoiding the problem of chain breakage, significantly reducing equipment failure rate, and improving the stability of the production process. They also have the advantages of high positioning accuracy, high transmission efficiency, fast response speed, smooth operation and high reliability. Furthermore, the material properties of synchronous belts can provide a certain buffering effect and improve the smoothness of operation. 3. A torsion bracket is installed on the first drive motor and fixed to the motor mounting plate by a support rod. With the help of a tightening nut and a buffer pad, it can offset the axial clearance or torsional deformation caused by installation and processing errors during motor operation, ensure the meshing stability of the gear and rack, avoid vibration, impact and accuracy reduction caused by excessive meshing clearance, and thus extend the service life of the drive assembly and telescopic arm. 4. The cooperation between the first sensor and the first sensing element enables real-time detection and automatic control of the operating position of the first telescopic arm, thereby ensuring the accuracy and safety of the telescopic movement. When the first sensor malfunctions or fails to detect, the limit blocks set at both ends of the fixed arm and the first telescopic arm can provide mechanical secondary limit, preventing the telescopic arm from continuing to run and causing structural interference or damage, thus improving the reliability and safety redundancy of the system operation. 5. A through-shaft motor is adopted and arranged between two support bases, so that the bidirectional lead screw can directly pass through the motor and be connected to its output end for transmission. While ensuring the reliability of the clamping action, the size of the mechanism in the width direction is effectively reduced, thereby reducing the overall space occupation rate of the equipment and improving the compactness of the layout. 6. When used in conjunction with an absolute encoder that can drive the first motor, the in-situ detection sensor can form a closed-loop control system. By combining the storage location detection sensor and the in-situ detection sensor, the status of the pallet in the storage location and equipment can be accurately confirmed, and the position of the pallet during the transfer process can be monitored and corrected in real time, thereby making the pallet positioning and limit control more accurate and stable. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0033] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0034] Figure 3 yes Figure 1 Enlarged schematic diagram of part B.

[0035] Figure 4 yes Figure 1 An enlarged schematic diagram of section C.

[0036] Figure 5 yes Figure 1 An enlarged schematic diagram of part D in the middle.

[0037] Figure 6 This is a schematic diagram of the structure of the clamping assembly and auxiliary gripper in Embodiment 1 of this application.

[0038] Figure 7 yes Figure 6 An enlarged schematic diagram of section E in the middle.

[0039] Figure 8 This is a schematic diagram of the structure of the support component used in Embodiment 1 of this application.

[0040] Figure 9 yes Figure 8 Enlarged schematic diagram of section F in the middle.

[0041] Figure 10 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0042] Figure 11 This is a schematic diagram of the structure of the folding component used in Embodiment 2 of this application.

[0043] Figure 12 yes Figure 10An enlarged schematic diagram of section G in the middle.

[0044] Figure 13 yes Figure 11 Enlarged schematic diagram of section H in the middle.

[0045] Explanation of reference numerals in the attached drawings: 1. Chassis; 11. First guide rail; 21. Support base; 22. Fixed arm; 23. First telescopic arm; 24. Second telescopic arm; 25. Second guide rail; 26. Third guide rail; 27. First sensor; 28. First sensing element; 29. ​​Limiting block; 210. Lever; 3. First drive assembly; 31. Motor mounting plate; 32. Clamping block; 33. Support plate; 34. Positioning bolt; 35. Clamping nut; 36. First drive motor; 37. Torque bracket; 38. Support rod; 39. Buffer pad; 310. Rack; 4. Synchronous belt drive assembly; 41. First synchronous pulley; 42. Second synchronous pulley; 43. First fixed block; 44. First adjusting bolt group; 45. Sliding block; 46. Synchronous conveyor belt; 47. Clamping plate; 5. Drive component; 51. Servo motor; 52. 61. Second drive motor; 62. Second fixing block; 63. Second adjusting bolt group; 64. Limiting plate; 65. Waist-shaped hole; 66. Auxiliary gripper; 67. Connecting plate; 68. Cable chain; 79. Clamping assembly; 70. Through-shaft motor; 71. Two-way lead screw; 72. Nut seat; 73. Second sensor; 74. Second sensor plate; 85. Support assembly; 86. Mounting frame; 87. Support roller; 88. Extension frame; 89. Guide protective pad; 80. In-place detection sensor; 81. Folding plate; 81. Storage location detection sensor; 92. Folding assembly; 93. Linkage component; 94. First rotating shaft; 95. Second rotating shaft; 96. Gear set; 97. First connecting rod; 98. Second gear; 99. Second connecting rod; 90. Third connecting rod; 91. Guide column; 91. Screen curtain; 92. Z-shaped block. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-13 This application will be described in further detail.

[0047] Example 1 This application discloses a clamping and telescopic mechanism for materials used in the production of large cylindrical batteries.

[0048] like Figure 1 and Figure 2The clamping and telescopic mechanism for large cylindrical battery production materials includes a chassis 1. Two sets of first guide rails 11 are arranged on each side of the chassis 1. A support base 21 is slidably connected to each set of first guide rails 11, and a fixed arm 22 is fixedly connected to the support base 21. A first telescopic arm 23 is slidably connected to one side of each of the two fixed arms 22 via a second guide rail 25. A second telescopic arm 24 is slidably connected to one side of each of the two first telescopic arms 23 via a third guide rail 26.

[0049] like Figure 1 and Figure 3 The first drive assembly 3 is installed on both the fixed arm 22 and the support base 21. The top of the first telescopic arm 23 is equipped with a synchronous belt drive assembly 4. The first drive assembly 3 is used to control the first telescopic arm 23 to move along its length extension direction. When the first telescopic arm 23 moves, the synchronous belt drive assembly 4 drives the second telescopic arm 24 to move along its length extension direction. The moving speed of the second telescopic arm 24 is twice the moving speed of the first telescopic arm 23.

[0050] Two sets of first sensors 27 are mounted on the top of the fixed arm 22. One set of first sensors 27 is located at the end of the fixed arm 22 away from the extended end of the second telescopic arm 24, and the other set of first sensors 27 is located in the middle region of the fixed arm 22. Each set of first sensors 27 consists of two sensors, and the two sensors 27 in the same set are at different heights. Among the four first sensors 27, the two sensors with lower heights are located between the two sensors with higher heights. Three first sensing plates 28 are mounted on the top of the first telescopic arm 23. The three first sensing plates 28 are located at the end of the first telescopic arm 23 and away from the extended end of the second telescopic arm 24. The three first sensing plates 28 are arranged sequentially along the length of the first telescopic arm 23, with the middle first sensing plate 28 being lower in height than the other two. The distance between two adjacent first sensing plates 28 is the same as the distance between two first sensors 27 in the same set. When the first sensor 27 senses the first sensing plate 28, the first drive assembly 3 stops operating, so that the first drive assembly 3 can automatically stop operating when the first telescopic arm 23 and the second telescopic arm 24 are fully retracted, and the first drive assembly 3 can also automatically stop operating when the second telescopic arm 24 is fully extended from the first telescopic arm 23.

[0051] like Figure 2Both ends of the fixed arm 22 and the first telescopic arm 23 are equipped with limit blocks 29. The limit block 29 of the fixed arm 22 is sleeved on the end of the second guide rail 25, and the limit block 29 of the first telescopic arm 23 is sleeved on the end of the third guide rail 26. The second telescopic arm 24 is a C-shaped plate, and a space is left between the second telescopic arm 24 and the first telescopic arm 23. A driving member 5 is installed on the side of the second telescopic arm 24 facing the first telescopic arm 23. The driving member 5 is connected to a lever 210, and the driving member 5 is used to drive the lever 210 to rotate. In this embodiment, the driving member 5 is a servo motor 51. The output end of the servo motor 51 is flush with the second telescopic arm 24. The lever 210 extends out of the second telescopic arm 24 and can be flipped to be perpendicular to the second telescopic arm 24.

[0052] like Figure 4 Each of the two second telescopic arms 24 has a second fixing block 61 bolted to one side opposite to it. A second adjusting bolt group 62 is installed on the second fixing block 61. A limit plate 63, an L-shaped plate, is also bolted to one side opposite to the two second telescopic arms 24, positioned further away from the extended end of the second telescopic arm 24 than the lever 210. The portion of the limit plate 63 that fits against the second telescopic arm 24 has an oblong hole 631. The position of the limit plate 63 is adjusted using the second adjusting bolt group 62, and then the bolts are tightened to fix the limit plate 63 onto the fixing arm 22, allowing the device to clamp trays of different lengths. The second adjusting bolt group 62 uses multiple bolts threadedly connected to the second fixing block 61, with the bolts abutting against the fixing block. Alternatively, a conventional method using nuts and bolts can be used for adjustment.

[0053] like Figure 4 and Figure 6 The bottom of the second telescopic arm 24 is also bolted with an auxiliary gripper 64. In this embodiment, the auxiliary gripper 64 consists of two square blocks with an insertion space between them. This insertion space is adapted to the ribs of the tray, and the distance between the front face of the tray (i.e., the side that contacts the lever 210) and the center line of the rib, and the distance between the lever 210 and the center line of the insertion space are equal, so that when the lever 210 abuts against the tray, the ribs of the tray are precisely positioned within the insertion space. The bottom of the support base 21 is also equipped with a connecting plate 65, on which a drag chain 66 is provided. One end of the drag chain 66 is fixed to the connecting plate 65, and the other end of the drag chain 66 is fixed to the bottom of the second telescopic arm 24 away from its output end.

[0054] like Figure 6 and Figure 8 The bottom of the chassis 1 is also equipped with a clamping assembly 7, which is used to drive the two fixed arms 22 to move relative to each other. The chassis 1 is also equipped with a support assembly 8, which is located above the clamping assembly 7 and between the two support seats 21. The support assembly 8 is used to support the tray.

[0055] like Figure 2 The first drive assembly 3 includes a motor mounting plate 31, which is fixed to the fixed arm 22 through multiple slots. Two clamping blocks 32 are bolted to the motor mounting plate 31. A support plate 33 is bolted to the top connecting rod of the support base 21. Two positioning bolts 34 are threaded through the support plate 33, and each positioning bolt 34 corresponds to one of the clamping blocks 32. Two clamping nuts 35 are threaded onto the positioning bolts 34. One clamping nut 35 abuts against the top of the clamping block 32, and the other clamping nut 35 abuts against the washer of the positioning bolt 34. The washer of the positioning bolt 34 abuts against the bottom of the support plate 33. It also includes a first drive motor 36. In this embodiment, the first drive motor 36 is a servo geared motor. A torque bracket 37 is installed on the first drive motor 36. A support rod 38 is connected to the torque bracket 37. The support rod 38 is fixedly connected to the fixed arm 22. A buffer pad 39 is sleeved on the support rod 38. The buffer pad 39 is made of polyurethane. One end of the buffer pad 39 extends into the torque bracket 37. A rack 310 is bolted to the bottom of the first telescopic arm 23 along its length. The connecting shaft of the first drive motor 36 passes through the motor mounting plate 31. A first gear (not shown in the figure) is provided on the connecting shaft of the first drive motor 36, and the gear meshes with the first rack 310. The meshing gap between the first gear and the rack 310 is adjustable by cooperating with the clamping block 32 of the clamping nut 35. In addition, the combination of the torque bracket 37 and the polyurethane buffer pad 39 helps to eliminate transmission problems caused by poor meshing during installation and processing.

[0056] like Figure 1 , Figure 3 and Figure 5The synchronous belt drive assembly 4 includes a first synchronous pulley 41 and a second synchronous pulley 42. The first synchronous pulley 41 is rotatably connected to the top of the first telescopic arm 23 and is positioned away from the extended end of the second telescopic arm 24. A first fixing block 43 is bolted to the top of the second telescopic arm 24. The first fixing block 43 is provided with a first adjusting bolt group 44. A moving groove is opened on the top of the first telescopic arm 23. Sliding blocks 45 are slidably provided on both the top and bottom walls of the moving groove. The two sliding blocks 45 are rotatably connected to the second synchronous pulley 42. The sliding blocks 45 are bolted to the first telescopic arm 23 through slotted holes. A synchronous conveyor belt 46 is tightly wound between the first synchronous pulley 41 and the second synchronous pulley 42. By adjusting the first adjusting bolt group 44, the position of the sliding blocks 45 can be adjusted. Then, the bolts are tightened to fix the sliding blocks 45, ensuring that the second synchronous pulley 42 and the first synchronous pulley 41 pull the synchronous conveyor belt 46 taut. The first adjusting bolt group 44 can contain multiple adjusting bolts. The adjusting bolts are threadedly connected to the first fixing block 43 and abut against the sliding block 45. Clamping plates 47 are bolted to both the fixed arm 22 and the second telescopic arm 24. The clamping plate 47 of the fixed arm 22 is positioned near the extended end of the second telescopic arm 24, while the clamping plate 47 of the second telescopic arm 24 is positioned away from its extended end. The two clamping plates 47 together clamp the synchronous conveyor belt 46.

[0057] Synchronous belt drives replace traditional chain drives, avoiding the problem of chain breakage, significantly reducing equipment failure rate, and improving the stability of the production process. They also have the advantages of high positioning accuracy, high transmission efficiency, fast response speed, smooth operation and high reliability. Furthermore, the material properties of synchronous belts can provide a certain buffering effect, improving the smoothness of operation.

[0058] like Figure 6 and Figure 7 The clamping assembly 7 includes a through-shaft motor 71, which is bolted to the chassis 1. The output end of the through-shaft motor 71 is located in the central area of ​​the chassis 1. The output section of the through-shaft motor 71 is connected to a bidirectional lead screw 72. The bidirectional lead screw 72 passes through the through-shaft motor 71 and is rotatably connected to the chassis 1. The bidirectional lead screw 72 is located between two first guide rails 11. A nut seat 73 is installed at the bottom of the support base 21. The nut seat 73 is threadedly connected to the bidirectional lead screw 72.

[0059] Two sets of second sensors 74 are provided near the support base 21 of the base, that is, there are a total of four sets of second sensors 74 on the chassis 1. There is a gap between the two sets of second sensors 74 on the same side. The number of each set of second sensors 74 is two, that is, there are a total of four second sensors 74, and the four second sensors 74 are arranged错开 from each other. The support base 21 is connected with four second induction sheets 75. Two of the second induction sheets 75 are arranged opposite to each other, and the other two second induction sheets 75 are located between the two relatively arranged second induction sheets 75. Three of the second induction sheets 75 are on the same horizontal plane, and the other second induction sheet 75 is on another horizontal plane. The second induction sheets 75 correspond to the second sensors on a one-to-one basis. When the second sensor 74 senses the second induction sheet 75, the through-shaft motor 71 stops operating. The redundant design of multiple sets of second sensors 74 and second induction sheets 75 can reduce the occurrence of equipment operation failures caused by the damage of a single second sensor 74.

[0060] Such as Figure 8 And Figure 9 , the support assembly 8 includes two mounting brackets 81. The two mounting brackets 81 are mounted on the chassis 1. The through-shaft motor 71 is located between the two mounting brackets 81. The bottom surface height of the two mounting brackets 81 is higher than the bottom height of the support base 21, so that both sides of the bottom of the two support bases 21 extend under the mounting brackets 81 on the same side; A number of support rollers 82 are jointly hinged on the two mounting brackets 81. The number of support rollers 82 is arranged along the extension direction of the second telescopic arm 24, and the support rollers 82 are perpendicular to the second telescopic arm ②; On the opposite sides of the two mounting brackets 81, there are also connected extension frames 83. The extension frames 83 are "L" - shaped plates. On the opposite sides of the two extension frames 83, there are provided guiding protection pads 84. The guiding protection pads 84 are arranged higher than the support rollers 82. And the side surface of the guiding protection pad 84 is flush with the side surface of the second telescopic arm 24.

[0061] Two sets of in-position detection sensors 85 are provided on the mounting bracket 81. One set of in-position detection sensors 85 is provided near the discharge end of the second telescopic arm 24, and the other set of in-position detection sensors 85 is provided near the limit plate 63. The number of each set of in-position detection sensors 85 is one. The two sets of in-position detection sensors 85 are both located between the limit plate 63 and the toggle lever 210. The in-position detection sensors 85 are used to sense whether there is a tray on the support roller 82; An extension frame 83 has a folding plate 86 mounted on its side opposite to the mounting frame 81. A storage location detection sensor 87 is fixed on the folding plate 86, tilting the sensor towards the centerline of the chassis 1. The storage location detection sensor 87 is used to identify whether there is a pallet in the storage area in front of it. The combination of the presence detection sensor 85, the absolute encoder built into the first drive motor 36, and the second sensor 74 forms a closed-loop control system, resulting in more accurate and stable positioning and limiting effects. The combined use of the storage location detection sensor 87 and the presence detection sensor 85 can accurately confirm the status of the pallet in the storage area and within the equipment, further improving the pallet status recognition capability within the equipment. It can also effectively prevent the equipment from performing invalid actions or causing pallet stacking interference, thereby ensuring the safety and reliability of the system operation.

[0062] The implementation principle of this application embodiment is as follows: the clamping component 7 controls the two fixed arms 22 to move relative to each other, so that the first telescopic arm 23 and the second telescopic arm 24 open. Then, the first drive component 3 and the synchronous belt drive component 4 cooperate to make the first telescopic arm 23 and the second telescopic arm 24 achieve multi-stage synchronous extension and retraction. Then, the drive component 5 drives the lever 210 to rotate to be perpendicular to the second telescopic arm 24. Then, the clamping component 7 controls the two second telescopic arms 24 to move closer to each other and hug the tray. The first telescopic arm 23 and the second telescopic arm 24 then retract. The lever 210 pushes the tray to move onto the support component 8 to complete the clamping work.

[0063] When it is necessary to send the pallet out, the lever 210 is rotated to be parallel to the second telescopic arm 24. Then the first drive assembly 3 drives the first telescopic arm 23 and the second telescopic arm 24 to extend. After the limit plate 63 pushes the pallet into the warehouse, the two second telescopic arms 24 move away from each other. Then the first telescopic arm 23 and the second telescopic arm 24 are reset.

[0064] Example 2 Reference Figure 10 The difference between this embodiment and Embodiment 1 is that a folding assembly 9 is provided on the side of the second telescopic arm 24 opposite to the first telescopic arm 23. The second folding assembly 9 is connected to a curtain 98. A linkage 91 is provided on the second telescopic arm 24, and the linkage 91 is located in the space between the first telescopic arm 23 and the second telescopic arm 24. The linkage 91 is connected to the drive component 5. When the control lever 210 of the drive unit 5 is rotated to be perpendicular to the second telescopic arm 24, the drive unit 5 controls the linkage 91 to drive the folding assembly 9 to be in a fully unfolded state. The folding assembly 9 drives the curtain 98 to unfold, and the two curtains 98 together cover the top of the tray.

[0065] like Figure 11 and Figure 12The driving component 5 is a second drive motor 52, which is installed on the side of the second telescopic arm 24 facing the first telescopic arm 23, and is located away from the extended end of the second telescopic arm 24. The second drive motor 52 is connected to a first rotating shaft 911, which is connected to a lever 210. The side of the second telescopic arm 24 away from the first telescopic arm 23 is rotatably connected to a second rotating shaft 912. The first rotating shaft 911 and the second rotating shaft 912 are connected by a gear set 913. In this embodiment, the gear set 913 consists of three gears, one of which is coaxially mounted on the first rotating shaft 911, another gear is coaxially mounted on the second rotating shaft 912, and the third gear is rotatably connected to the second telescopic arm 24. The three gears mesh sequentially, causing the first rotating shaft 911 and the second rotating shaft 912 to rotate in the same direction. The folding component 9 is mounted on the second rotating shaft 912.

[0066] like Figure 13 The folding component 9 includes a plurality of first links 92, which are divided into two groups with the same number of links 92 in both groups. In this embodiment, each group has five links 92. The five links 92 in the same group are connected sequentially. The adjacent ends of two adjacent links 92 are connected by Z-shaped blocks 99. Each of the two links 92 is hinged to a turning area of ​​the Z-shaped block 99. Furthermore, a second gear 93 is fixedly provided at the adjacent ends of two adjacent links 92. The two adjacent second gears 93 mesh with each other. The adjacent ends of two adjacent Z-shaped blocks 99 are hinged together with a second link 94. Specifically, the first connecting rod 92 adjacent to the second telescopic arm 24 is fixed to the second rotating shaft 912, and there are two second rotating shafts 912. Each of the two second rotating shafts 912 is connected to one of the first connecting rods 92. The two ends of the second to fourth connecting rods 92 are all connected to the second gear 93. The end of the first connecting rod 92 facing the second connecting rod 92 is connected to the second gear 93, and the end of the fifth connecting rod 92 facing the fourth connecting rod 92 is connected to the second gear 93. The hinge axis of the Z-shaped block 99 and the first connecting rod 92 is coaxial with the second gear 93.

[0067] The second telescopic arm 24 is also hinged to a third link 96, and the other end of the third link 96 is hinged to the end of its adjacent Z-shaped block 99. The second link 94 corresponds one-to-one with the first link 92 and is parallel to it; the third link 96 is parallel to the first link 92 adjacent to the second telescopic arm 24. Guide posts 97 are provided at one end of the third link 96 near the second telescopic arm 24, the middle of the Z-shaped block 99, and the end of the fifth first link 92. The guide posts 97 of the two sets of first links 92 correspond one-to-one, and the two sides of the curtain 98 are fitted onto multiple guide posts 97 on the same side.

[0068] The implementation principle of Example 2 is as follows: The second drive motor 52 controls the rotation of the first rotating shaft 911. The first rotating shaft 911 drives the second rotating shaft 912 to rotate in the same direction through the gear set 913. As the lever 210 flips perpendicular to the second telescopic arm 24, several first connecting rods 92 flip synchronously. Under the combined action of the second gear 93, the second connecting rod 94, and the third connecting rod 96, several first connecting rods 92 gradually unfold, realizing the unfolding of the shielding curtain 98 to cover the tray. Thus, when the tray is clamped and transported, its top can be covered by the shielding curtains 98 on both sides, which plays a role in preventing dust and foreign objects from falling in. This structure utilizes the linkage between the rotation of the lever 210 and the unfolding of the shielding curtain 98 to achieve automatic protection without the need for an additional drive component 5. This not only improves the automation level and integrated design level of the system, but also effectively reduces the risk of contamination of the battery tray during transportation and temporary storage, ensuring the safety and stability of the battery production process.

[0069] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A clamping and telescopic mechanism for materials used in the production of large cylindrical batteries, characterized in that: Includes a chassis (1), on which two fixed arms (22) are slidably disposed. A first telescopic arm (23) is slidably connected to one side of each of the two fixed arms (22). A second telescopic arm (24) is slidably connected to one side of each of the two first telescopic arms (23). A synchronous belt drive assembly (4) is disposed on the first telescopic arm (23). The first telescopic arm (23) is driven to move by a first drive assembly (3), thereby driving the synchronous belt drive assembly (4) to move, and then the synchronous belt drive assembly (4) drives the second telescopic arm (24) to move. A drive member (5) is provided on the second telescopic arm (24), and the drive member (5) is connected to a lever (210). The drive member (5) controls the lever (210) to rotate. A limit plate (63) is provided on one side of each of the two second telescopic arms (24). The lever (210) is located closer to the extended end of the second telescopic arm (24) than the limit plate (63). A clamping assembly (7) is installed on the chassis (1), which is used to drive the two fixed arms (22) to move relative to each other. A support assembly (8) is also installed on the chassis (1), which is located between the two fixed arms (22) and is used to support the tray.

2. The clamping and telescopic mechanism for large cylindrical battery production materials according to claim 1, characterized in that: The second telescopic arm (24) is a U-shaped plate, the driving component (5) is installed inside the second telescopic arm (24), and the lever (210) can be flipped to be perpendicular to the second telescopic arm (24); The synchronous belt drive assembly (4) includes a first synchronous pulley (41) and a second synchronous pulley (42). The first synchronous pulley (41) is rotatably connected to the first telescopic arm (23). A first fixed block (43) is installed on the first telescopic arm (23). A sliding block (45) is provided on the first telescopic arm (23). The second synchronous pulley (42) is rotatably connected to the sliding block (45). A first adjusting bolt group (44) is threadedly connected to the first fixed block (43). The first adjusting bolt group (44) abuts against the sliding block (45). A synchronous conveyor belt (46) is wound around the first synchronous pulley (41) and the second synchronous pulley (42). The synchronous conveyor belt (46) is taut. A clamping plate (47) is provided on both the fixed arm (22) and the second telescopic arm (24). The clamping plate (47) clamps the synchronous conveyor belt (46).

3. The clamping and telescopic mechanism for large cylindrical battery production materials according to claim 1, characterized in that: The fixed arm (22) is connected to a support base (21), the support base (21) is slidably connected to the chassis (1), the first drive assembly (3) includes a motor mounting plate (31), a first drive motor (36) is mounted on the motor mounting plate (31), the first drive motor (36) is connected to a first gear, the first telescopic arm (23) is provided with a rack (310) along its length direction, the rack (310) meshes with the first gear, the first drive motor (36) is also connected to a torque bracket (37), the torque bracket (37) is connected to a support rod (38), the support rod (38) is fixed to the motor mounting plate (31).

4. The clamping and telescopic mechanism for large cylindrical battery production materials according to claim 3, characterized in that: At least two clamping blocks (32) are provided on the motor mounting plate (31). The support base (21) is fixedly connected to the support plate (33). The support plate (33) and the clamping blocks (32) are both provided with a positioning bolt (34). The positioning bolt (34) is threadedly connected to two clamping nuts (35). One clamping nut (35) abuts against the top of the clamping block (32), and the other clamping nut (35) abuts against the washer of the positioning bolt (34), so that the positioning bolt (34) is fixed to the support plate (33). A buffer pad (39) is sleeved on the support rod (38), and the buffer pad (39) abuts against the torsion bracket (37).

5. The clamping and telescopic mechanism for large cylindrical battery production materials according to claim 1, characterized in that: A first sensor (27) is provided at the end of the fixed arm (22) away from the lever (210) and at the middle area of ​​the fixed arm (22). A first sensing plate (28) is provided on the first telescopic arm (23). When the first sensor (27) senses the first sensing plate (28), the first drive assembly (3) stops operating. Limit blocks (29) are installed at both ends of the fixed arm (22) and the first telescopic arm (23).

6. The clamping and telescopic mechanism for large cylindrical battery production materials according to claim 3, characterized in that: The limiting plate (63) is an L-shaped block, and the limiting plate (63) has an oblong hole (631). The limiting plate (63) is bolted to the second telescopic arm (24) through the oblong hole (631). The second telescopic arm (24) is equipped with a second fixing block (61). The second fixing block (61) is connected to a second adjusting bolt group (62). The second adjusting bolt group (62) abuts against the limiting plate (63). The second telescopic arm (24) is also provided with an auxiliary gripper (64). When the lever (210) and the second telescopic arm (24) abut against the tray together, the ribs of the tray are inserted into the auxiliary gripper (64). The drive unit (5) includes a servo motor (51) with a built-in angle encoder.

7. The clamping and telescopic mechanism for large cylindrical battery production materials according to claim 3, characterized in that: The clamping assembly (7) includes a through-shaft motor (71) and a bidirectional lead screw (72). The through-shaft motor (71) is mounted on the chassis (1) and is located between two support seats (21). The bidirectional lead screw (72) passes through the through-shaft motor (71) and is connected to the output end of the through-shaft motor (71). The bidirectional lead screw (72) is rotatably connected to the chassis (1). The support seat (21) is connected to a nut seat (73). The nut seat (73) is threadedly connected to the bidirectional lead screw (72). Two sets of second sensors (74) are provided on the chassis (1) near the support seat (21). There is a gap between the two sets of second sensors (74). The support seat (21) is connected to a second sensing plate (75). When the second sensor (74) senses the second sensing plate (75), the through-shaft motor (71) stops operating.

8. The clamping and telescopic mechanism for large cylindrical battery production materials according to claim 1, characterized in that: The support assembly (8) includes two mounting brackets (81), which are mounted on the chassis (1). The two mounting brackets (81) are hinged together with a plurality of support rollers (82). The plurality of support rollers (82) are arranged along the extension direction of the second telescopic arm (24), and the support rollers (82) are perpendicular to the second telescopic arm (24). The mounting frame (81) is provided with two sets of in-situ detection sensors (85), one of which is located near the discharge end of the second telescopic arm (24). Another set of the in-situ detection sensors (85) is disposed near the limiting plate (63) and between the limiting plate (63) and the lever (210). The in-situ detection sensors (85) are used to sense whether there is a tray on the support roller (82). At least one of the mounting brackets (81) is equipped with a storage location detection sensor (87) for identifying whether there is a pallet in the storage room in front of it, and the storage location detection sensor (87) is inclined toward the center line of the chassis (1).

9. The clamping and telescopic mechanism for large cylindrical battery production materials according to claim 1, characterized in that: The second telescopic arm (24) is provided with a folding component (9), the folding component (9) is connected to a curtain (98), the second telescopic arm (24) is provided with a linkage (91), the linkage (91) is connected to the drive component (5); When the drive member (5) controls the lever (210) to rotate to be perpendicular to the second telescopic arm (24), the drive member (5) controls the linkage member (91) to drive the folding assembly (9) to be in a fully unfolded state. The folding assembly (9) drives the curtain (98) to unfold, and the two curtains (98) together cover the top of the tray.

10. The clamping and telescopic mechanism for large cylindrical battery production materials according to claim 9, characterized in that: The driving component (5) is a second driving motor (52), which is mounted on the second telescopic arm (24). The linkage (91) includes a first rotating shaft (911), which is connected to the first rotating shaft (911). The first rotating shaft (911) is connected to the lever (210). A second rotating shaft (912) is rotatably connected to the second telescopic arm (24). The first rotating shaft (911) and the second rotating shaft (912) are connected by a gear set (913) so that the first rotating shaft (911) and the second rotating shaft (912) rotate in the same direction. The folding component (9) is disposed on the second rotating shaft (912). The folding assembly (9) includes a plurality of first links (92), which are divided into two groups. The number of first links (92) in the two groups is the same. The plurality of first links (92) in the same group are connected in sequence. The adjacent ends of two adjacent first links (92) are connected by Z-shaped blocks (99). Each of the two first links (92) is hinged to a turning area of ​​the Z-shaped block (99). Furthermore, a second gear (93) is fixedly provided at the adjacent ends of two adjacent first links (92). The two adjacent second gears (93) mesh with each other. The adjacent ends of two adjacent Z-shaped blocks (99) are hinged together by a second link (94). One end of the first connecting rod (92) adjacent to the second telescopic arm (24) is fixedly set to the second rotating shaft (912), and a third connecting rod (96) is also hinged on the second telescopic arm (24), and the other end of the third connecting rod (96) is hinged to the end of the adjacent Z-shaped block (99); The second link (94) corresponds to the first link (92) and is parallel to it, and the third link (96) is parallel to the first link (92) adjacent to the second telescopic arm (24); The third connecting rod is provided with guide posts (97) at one end near the second telescopic arm (24), at the middle of the Z-shaped block (99), and at the end of the first connecting rod (92) away from the second telescopic arm (24). The guide posts (97) of the two sets of first connecting rods (92) correspond one-to-one. The two sides of the curtain (98) are sleeved on the multiple guide posts (97) on the same side.

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