Cantilever telescoping mechanism

Abstract

The invention relates to the technical field of material conveying equipment, in particular to a cantilever telescopic mechanism which comprises a base, a first supporting arm, a second supporting arm, a first transmission module used for driving the first supporting arm to stretch out and draw back and a second transmission module used for driving the second supporting arm to stretch out and draw back. The second supporting arm wraps the peripheral side of the first supporting arm. The second supporting arm comprises a mounting plate, a first side plate, a second side plate and a plurality of first guide wheel sets. The first side plate and the second side plate are connected to the mounting plate through screws. A plurality of first guide wheel sets are arranged on the inner side faces of the first side plate and the second side plate at intervals. The two outer side faces of the first supporting arm are slidably connected to the pulley faces of the first guide wheel set at the same time. A plurality of second guide wheel sets are arranged on the two sides of the base at intervals, and the two inner side faces of the first supporting arm are slidably connected to the pulley faces of the second guide wheel sets at the same time. The base, the first supporting arm and the second supporting arm are all of a detachable structure, machining is convenient, transportation and storage are more convenient, and the machining and maintenance cost is low.

Description

Technical Field

[0001] This invention relates to the field of material conveying equipment technology, and in particular to a cantilever telescopic mechanism. Background Technology

[0002] High-efficiency stacker cranes require high material storage efficiency. This not only requires high operating speed of the crane, but most importantly, it requires strict control over the fork's operating speed. This is especially true when the size and specifications of the goods are inconsistent, where the fork's speed has a more significant impact. Therefore, the fork is the core equipment of a high-efficiency stacker crane.

[0003] Forks generally come in two types: rack and pinion telescopic forks and chain telescopic forks. Rack and pinion telescopic forks use two or three fork sections. Three-section forks consist of a front fork, a middle fork, a fixed fork, and guide rollers forming the telescopic mechanism. Chain telescopic forks consist of an upper / middle telescopic fork, a fixed fork, and guide wheels. In existing equipment, each fork section is machined as a single piece, resulting in higher overall costs and more cumbersome transportation and storage. Summary of the Invention

[0004] In order to address the technical deficiencies mentioned in the background section, the present invention aims to provide a cantilever telescopic mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A cantilever telescopic mechanism includes a base, a first arm slidably disposed along the length direction of the base, a second arm slidably disposed along the length direction of the first arm, a first transmission module for driving the first arm to extend and retract, and a second transmission module for driving the second arm to extend and retract. The second arm covers the outer periphery of the first arm and includes a mounting plate, a first side plate disposed on one side of the mounting plate, a second side plate disposed on the other side of the mounting plate, and multiple sets of first guide wheel groups. The first side plate and the second side plate are both screwed to the mounting plate. Multiple sets of first guide wheel groups are spaced apart on the inner surfaces of the first side plate and the second side plate. The two outer surfaces of the first arm are simultaneously slidably connected to the pulley surfaces of the first guide wheel groups. Multiple sets of second guide wheel groups are spaced apart on both sides of the base, and the two inner surfaces of the first arm are simultaneously slidably connected to the pulley surfaces of the second guide wheel groups.

[0006] By adopting the above technical solution, the base, first arm, and second arm are all designed as detachable structures. The second arm is assembled from a mounting plate, a first side plate, and a second side plate. This detachable connection method facilitates processing, transportation, and storage, reduces storage space, and lowers processing and maintenance costs. The first arm is supported by the first and second guide wheel sets, and the first transmission module drives the extension and retraction of the first arm, while the second transmission module drives the extension and retraction of the second arm. Lateral limiting helps to reduce the overall height of the cantilever telescopic mechanism, enhances compatibility, and improves the efficiency of telescopic handling operations.

[0007] Furthermore, the first guide wheel assembly includes at least one first vertical guide wheel, a first mounting base for mounting the first vertical guide wheel, at least one first horizontal guide wheel, and a second mounting base for mounting the first horizontal guide wheel, thereby improving the smoothness of sliding and the stability of support. The diameter of the first vertical guide wheel is vertically oriented and parallel to the outer surface of the first support arm. The diameter of the first horizontal guide wheel is horizontally oriented and perpendicular to the outer surface of the first support arm, reducing frictional resistance and improving sliding efficiency. Both the first and second mounting bases are screwed to the corresponding first and second side plates, making installation and disassembly convenient and quick.

[0008] Furthermore, a recessed mounting groove is provided at the lower end of the first side plate. The first mounting base includes an L-shaped first base body, a first bearing seat, and a second base body. One end of the first base body is screwed to the top wall of the mounting groove, and the other end of the first base body is located on the outer side of the first side plate and abuts against the lower surface of the first bearing seat, reducing installation space and improving space utilization. One end of the first bearing seat is located on the outer side of the first side plate, and the other end of the first bearing seat passes through the first side plate and connects to the first vertical guide wheel. The second base body is screwed to the first side plate and is located above the first bearing seat. The lower surface of the second base body and the upper surface of the other end of the first base body cooperate to clamp and fix the first bearing seat, making installation and disassembly convenient, with a compact structure and high assembly efficiency.

[0009] Furthermore, the first side plate is provided with a fixing groove for mounting the second mounting base and the first horizontal guide wheel. The second mounting base includes a connecting shaft, a third seat body connected to one end of the connecting shaft, and a fourth seat body connected to the other end of the connecting shaft. The middle part of the third seat body protrudes and engages with the upper end of the fixing groove. The two ends of the third seat body abut against the inner sidewall of the second side plate and are screwed to the second side plate, resulting in a more compact structure and higher space utilization. The middle part of the fourth seat body protrudes and engages with the lower end of the fixing groove. The two ends of the fourth seat body abut against the inner sidewall of the second side plate and are screwed to the second side plate, making assembly convenient and quick, and reducing costs. The first horizontal guide wheel is fitted onto the connecting shaft and located between the third and fourth seat bodies.

[0010] Furthermore, the first support arm includes a fixed plate, a first limiting plate mounted on one side of the fixed plate, and a second limiting plate mounted on the other side of the fixed plate. Both the first and second limiting plates have a first sliding groove along their length on their outer sidewalls, and both have a second sliding groove along their length on their inner sidewalls. The first guide wheel assembly is slidably disposed within the first sliding groove, and the second guide wheel assembly is slidably disposed within the second sliding groove, improving stability during the extension and retraction process.

[0011] Furthermore, the first limiting plate and the second limiting plate have the same structure and are both made of I-beams, which are easy to process and have low cost.

[0012] Furthermore, the base includes a first frame, a second frame parallel to the first frame, multiple connecting plates connected to the lower ends of the first and second frames, and two end caps. Each end of the first and second frames is screwed to one of the end caps. The multiple connecting plates are spaced apart along the length of the first frame to fix the first and second frames, saving costs. Multiple sets of second guide wheels are spaced apart on the outer walls of both the first and second frames, providing a modular design, higher assembly efficiency, and lower transportation and storage costs.

[0013] Furthermore, the first transmission module includes multiple sets of gears and a rack. The multiple sets of gears are arranged sequentially and at intervals within the base, with adjacent sets of gears meshing together. The rack is fixed to the first support arm and located above the multiple sets of gears. The rack meshes with the multiple sets of gears, resulting in stable transmission and a simple structure.

[0014] Furthermore, the gear set includes a first rotating rod, a second rotating rod, a driving gear, and a driven gear. The first and second rotating rods are spaced apart on the base. The driving gear is mounted on the first rotating rod and meshes with the rack. This design reduces cost, helps decrease the overall height, adapts to different handling environments, and offers greater compatibility. The driven gear is mounted on the second rotating rod and meshes with the adjacent driving gear, further contributing to cost savings. One of the first rotating rods is connected to the output end of an external servo motor.

[0015] Furthermore, a second transmission module is provided between the first and second support arms. The second transmission module includes a first chain, a first chain seat, a second chain, and a second chain seat. The first chain seat is fixed to one end of the first support arm, and the second chain seat is fixed to the other end of the second support arm. One end of the first chain is fixed to the lower surface of the mounting plate, and the other end of the first chain is engaged with the first chain seat and passes through the second support arm, located between the first support arm and the base. One end of the second chain is fixed to the lower surface of the mounting plate, and the other end of the second chain is engaged with the second chain seat and passes through the first support arm, located between the first support arm and the base. The first support arm drives the second support arm to extend synchronously via the first chain and retracts synchronously via the second chain. This design is simple, has higher linkage efficiency, and improves handling efficiency.

[0016] In summary, the beneficial effects of the present invention are as follows: In this invention, the base, first arm, and second arm are all designed as detachable structures. The second arm is assembled from a mounting plate, a first side plate, and a second side plate. This detachable connection method facilitates processing, transportation, and storage, reduces storage space, and lowers processing and maintenance costs. The first arm is supported and limited by the first and second guide wheel sets. The first transmission module drives the extension and retraction of the first arm, and the second transmission module drives the extension and retraction of the second arm. Lateral limiting helps to reduce the overall height of the cantilever telescopic mechanism, enhances compatibility, and improves the efficiency of telescopic handling operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation structure of an embodiment of the cantilever telescopic mechanism of the present invention.

[0018] Figure 2 This is a schematic diagram of the installation structure from another perspective of an embodiment of the cantilever telescopic mechanism of the present invention.

[0019] Figure 3 This is a schematic diagram of a structure of an embodiment of the cantilever telescopic mechanism of the present invention.

[0020] Figure 4 This is a side view of an embodiment of the cantilever telescopic mechanism of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of an embodiment of the second arm of the cantilever telescopic mechanism of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of an embodiment of the first arm of the cantilever telescopic mechanism of the present invention.

[0023] Figure 7 This is a schematic diagram of the installation structure of an embodiment of the base of the cantilever telescopic mechanism of the present invention.

[0024] Figure 8 yes Figure 7 Side view.

[0025] Figure 9 This is a schematic diagram of the installation structure of the first transmission module and the second transmission module of the cantilever telescopic mechanism of the present invention.

[0026] Figure 10 This is a schematic diagram of the installation structure of the first transmission module and the second transmission module of the cantilever telescopic mechanism of the present invention from another perspective.

[0027] Explanation of the reference numerals in the figure: 1. Cantilever telescopic mechanism; 2. Base; 21. First frame; 22. Second frame; 23. Connecting plate; 24. End cap; 25. Second guide wheel assembly; 3. First support arm; 31. Fixing plate; 32. First limiting plate; 33. Second limiting plate; 34. First sliding groove; 35. Second sliding groove; 36. First connecting block; 4. Second support arm; 41. Mounting plate; 42. First side plate; 43. Second side plate; 44. First guide wheel assembly; 441. First vertical guide wheel; 442. First mounting seat; 4421. First seat body; 4422. First bearing seat; 4423. Second seat body; 443. Second mounting seat; 4 431. Connecting shaft; 4432. Third seat; 4433. Fourth seat; 444. First horizontal guide wheel; 5. First transmission module; 51. Gear set; 511. First rotating rod; 512. Second rotating rod; 513. Driving gear; 514. Driven gear; 52. Rack; 6. Second transmission module; 61. First chain belt; 62. First chain seat; 63. Second chain belt; 64. Second chain seat; 65. Limiting strip; 66. Guide strip; 67. Connecting seat; 7. Motor drive module; 71. Servo motor; 72. Reducer; 73. First connecting rod; 8. Material; 9. Frame; 10. Lifting mechanism; 11. Load-bearing frame. Detailed Implementation

[0028] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0029] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0030] In the description of this invention, the use of terms such as "a number" means one or more, with "more than" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while terms like "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the sequential relationship between indicated technical features.

[0031] The following is in conjunction with the appendix Figure 1-10 The embodiments of the present invention will be described in further detail below.

[0032] A cantilever telescopic mechanism 1, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it includes a base 2, a first support arm 3 slidably disposed along the length of the base 2, a second support arm 4 slidably disposed along the length of the first support arm 3, a first transmission module 5 for driving the extension and retraction of the first support arm 3, and a second transmission module 6 for driving the extension and retraction of the second support arm 4. The second support arm 4 covers the outer periphery of the first support arm 3. The second support arm 4 includes a mounting plate 41, a first side plate 42 disposed on one side of the mounting plate 41, a second side plate 43 disposed on the other side of the mounting plate 41, and multiple sets of first guide wheel sets 44. The first side plate 42 and the second side plate 43 are both screwed to the mounting plate 41. Multiple sets of first guide wheel sets 44 are spaced apart on the inner surfaces of the first side plate 42 and the second side plate 43. The two outer surfaces of the first support arm 3 are simultaneously slidably connected to the pulley surfaces of the first guide wheel sets 44. Multiple sets of second guide wheel sets 25 are spaced apart on both sides of the base 2, and the two inner surfaces of the first support arm 3 are simultaneously slidably connected to the pulley surfaces of the second guide wheel sets 25.

[0033] The base 2, first arm 3, and second arm 4 are all detachable structures. The second arm 4 is assembled from mounting plate 41, first side plate 42, and second side plate 43. This detachable connection facilitates processing, transportation, and storage, reduces storage space, and lowers processing and maintenance costs. The first arm 3 is supported by the first guide wheel assembly 44 and the second guide wheel assembly 25. The first transmission module 5 drives the first arm 3 to extend and retract, and the second transmission module 6 drives the second arm 4 to extend and retract. Lateral limiting helps reduce the overall height of the cantilever telescopic mechanism 1, enhances compatibility, and improves the efficiency of telescopic handling operations.

[0034] In some embodiments, please refer to Figure 3 , Figure 4 , Figure 5 The first guide wheel assembly 44 includes at least one first vertical guide wheel 441, a first mounting base 442 for mounting the first vertical guide wheel 441, at least one first horizontal guide wheel 444, and a second mounting base 443 for mounting the first horizontal guide wheel 444, improving the smoothness of sliding and the stability of support. The diameter of the first vertical guide wheel 441 is vertically set and parallel to the outer side of the first support arm 3. The diameter of the first horizontal guide wheel 444 is horizontally set and perpendicular to the outer side of the first support arm 3, reducing frictional resistance and improving sliding efficiency. The first mounting base 442 and the second mounting base 443 are both screwed to the corresponding first side plate 42 and second side plate 43, making installation and disassembly convenient and quick.

[0035] The first vertical guide wheel 441 can cooperate to support the first arm 3 to limit the vertical position of the first arm 3, and the first horizontal guide wheel 444 can cooperate with the second guide wheel group 25 to limit the horizontal position of the first arm 3. This can reduce friction and improve the telescopic efficiency, and also support and fix the first arm 3. The structure is more compact and the cost is lower.

[0036] Preferably, the lower end of the first side plate 42 is provided with a recessed mounting groove. The first mounting base 442 includes an L-shaped first base body 4421, a first bearing seat 4422, and a second base body 4423. One end of the first base body 4421 is screwed to the top wall of the mounting groove, and the other end of the first base body 4421 is located on the outer side of the first side plate 42 and abuts against the lower surface of the first bearing seat 4422, reducing installation space and improving space utilization. One end of the first bearing seat 4422 is located on the outer side of the first side plate 42, and the other end of the first bearing seat 4422 passes through the first side plate 42 and is connected to the first vertical guide wheel 441. The second base body 4423 is screwed to the first side plate 42 and is located above the first bearing seat 4422. The lower surface of the second base body 4423 and the upper surface of the other end of the first base body 4421 cooperate to clamp and fix the first bearing seat 4422, making installation and disassembly convenient, the structure compact, and the assembly efficiency high.

[0037] The first side plate 42 is provided with a fixing groove for mounting the second mounting base 443 and the first horizontal guide wheel 444. The second mounting base 443 includes a connecting shaft 4431, a third seat body 4432 connected to one end of the connecting shaft 4431, and a fourth seat body 4433 connected to the other end of the connecting shaft 4431. The middle part of the third seat body 4432 protrudes and is engaged with the upper end of the fixing groove. Both ends of the third seat body 4432 abut against the inner side wall of the second side plate 43 and are screwed to the second side plate 43. This design avoids misalignment, resulting in a more compact structure and higher space utilization. The middle part of the fourth seat body 4433 protrudes and is engaged with the lower end of the fixing groove. Both ends of the fourth seat body 4433 abut against the inner side wall of the second side plate 43 and are screwed to the second side plate 43. This design facilitates quick and easy assembly and reduces costs. The first horizontal guide wheel 444 is fitted onto the connecting shaft 4431 and is located between the third seat body 4432 and the fourth seat body 4433.

[0038] In some embodiments, please refer to Figure 3 , Figure 4 , Figure 6 The first support arm 3 includes a fixed plate 31, a first limiting plate 32 installed on one side of the fixed plate 31, and a second limiting plate 33 installed on the other side of the fixed plate 31. The outer sidewalls of both the first limiting plate 32 and the second limiting plate 33 are provided with a first sliding groove 34 along their length, and the inner sidewalls of both the first limiting plate 32 and the second limiting plate 33 are provided with a second sliding groove 35 along their length. A first guide wheel assembly 44 is slidably disposed within the first sliding groove 34, and a second guide wheel assembly 25 is slidably disposed within the second sliding groove 35, improving the stability during the extension and retraction process.

[0039] The first sliding groove 34 and the second sliding groove 35 on both sides of the first limiting plate 32 and the second limiting plate 33 can be stamped, resulting in higher processing efficiency and precision. Multiple first connecting blocks 36 are screwed onto the inner sidewalls of the upper ends of the first limiting plate 32 and the second limiting plate 33 along their length. The sides of the multiple first connecting blocks 36 are screwed onto the fixing plate 31, improving the overall load-bearing strength of the connection and increasing the weight of the transported material 8.

[0040] Preferably, the first limiting plate 32 and the second limiting plate 33 have the same structure and are both made of I-beam steel, which is convenient to process and has a low cost.

[0041] In some embodiments, please refer to Figure 4 , Figure 7 The base 2 includes a first frame 21, a second frame 22 parallel to the first frame 21, multiple connecting plates 23 connecting the lower ends of the first frame and the second frame 22, and two end caps 24. An end cap 24 is screwed to each end of the first frame 21 and the second frame 22. Multiple connecting plates 23 are spaced apart along the length of the first frame 21 to fix the first frame 21 and the second frame 22, saving costs. Multiple sets of second guide wheel assemblies 25 are spaced apart on the outer walls of the first frame 21 and the second frame 22, providing a modular design, higher assembly efficiency, and lower transportation and storage costs.

[0042] The structure of the second guide wheel group 25 is the same as that of the first guide wheel group 44, and the installation method is the same as that of the first guide wheel group 44 on the second support arm 4. Please refer to the above-mentioned relevant content for details.

[0043] In some embodiments, please refer to Figure 3 , Figure 7 , Figure 8 , Figure 9 The first transmission module 5 includes multiple sets of gears 51 and racks 52. The multiple sets of gears 51 are arranged sequentially and at intervals within the base 2, with adjacent sets of gears 51 meshing together. The rack 52 is fixed to the first support arm 3 and located above the multiple sets of gears 51. The rack 52 meshes with the multiple sets of gears 51, resulting in stable transmission and a simple structure. All sets of gears 51 are located within the mounting cavity of the base 2.

[0044] Preferably, the gear set 51 includes a first rotating rod 511, a second rotating rod 512, a driving gear 513, and a driven gear 514. The first rotating rod 511 and the second rotating rod 512 are spaced apart on the base 2. The driving gear 513 is mounted on the first rotating rod 511 and meshes with the rack 52. This design reduces cost, helps decrease the overall height, adapts to different handling environments, and offers greater compatibility. The driven gear 514 is mounted on the second rotating rod 512 and meshes with the adjacent driving gear 513, further reducing costs. One of the first rotating rods 511 is connected to the output end of an external servo motor 71.

[0045] Specifically, the external motor drive module 7 of the cantilever telescopic mechanism 1 includes a servo motor 71, a reducer 72, and a first connecting rod 73. The output end of the servo motor 71 is connected to the first input end of the reducer 72, and the first output end of the reducer 72 is connected to one end of the first connecting rod 73. The other end of the first connecting rod 73 is fixedly connected to one end of one of the first rotating rods 511, so that the servo motor 71 can drive the drive gear 513 on it to rotate through the first connecting rod 73. The drive gear 513 synchronously drives all the driven gears 514 and other drive gears 513 to rotate. The rotation of the drive gear 513 can drive the rack 52 to move the first arm 3 on it in a telescopic motion relative to the base 2. (See attached diagram.) Figure 2 The motor drive module 7 can synchronously drive the two sets of cantilever telescopic mechanisms 1 to perform telescopic movements. When the second arm 4 extends below the pallet holding the material 8, the lifting mechanism can drive the cantilever telescopic mechanism 1 and the motor drive module 7 to lift synchronously. Alternatively, the storage equipment can lower the material onto the cantilever telescopic mechanism 1, causing the second arm 4 to lift the pallet and the material 8, and then retract the first arm 3 and the second arm 4 to transfer the material 8.

[0046] In some embodiments, please refer to Figure 3 , Figure 7 , Figure 9 , Figure 10A second transmission module 6 is provided between the first support arm 3 and the second support arm 4. The second transmission module 6 includes a first chain belt 61, a first chain seat 62, a second chain belt 63, and a second chain seat 64. The first chain seat 62 is fixed to one end of the first support arm 3, and the second chain seat 64 is fixed to the other end of the second support arm 4. One end of the first chain belt 61 is fixed to the lower surface of the mounting plate 41, and the other end of the first chain belt 61 is engaged with the first chain seat 62 and passes through the second support arm 4, located between the first support arm 3 and the base 2. One end of the second chain belt 63 is fixed to the lower surface of the mounting plate 41, and the other end of the second chain belt 63 is engaged with the second chain seat 64 and passes through the first support arm 3, located between the first support arm 3 and the base 2. The first support arm 3 drives the second support arm 4 to extend synchronously via the first chain belt 61, and drives the second support arm 4 to retract synchronously via the second chain belt 63. The structure is simple, the linkage efficiency is higher, and the handling efficiency is improved.

[0047] Preferably, to prevent misalignment or entanglement between the first chain belt 61 and the second chain belt 63 during operation, a limiting strip 65 can be provided at the lower end of the first chain belt 61 and the second chain belt 63, and a guide strip 66 can be provided at the upper end. A limiting groove is formed between the inner sidewall of the limiting strip 65 and the corresponding guide strip 66, thereby allowing the first chain belt 61 and the second chain belt 63 to move smoothly back and forth, improving the stability during handling. One end of the first chain belt 61 and the second chain belt 63 is connected to the mounting plate 41 through a connecting seat 67. The connecting seat 67 is provided with a guide groove along the length direction of the chain belt, and the guide strip 66 is slidably disposed in the guide groove, which can improve the stability and accuracy of the extension and retraction of the second support arm 4.

[0048] To improve safety, the first chain seat 62 and the second chain seat 64 are set out to protrude from the fixing plate 31, so that when the first chain belt 61 or the second chain belt 63 extends or retracts, the first chain seat 62 and the second chain seat 64 can form an abutting connection at the connection position between one end of the first chain belt 61 and one end of the second chain belt 63 and the mounting plate 41, preventing the second arm 4 from continuing to move, so as to prevent the second arm 4 from over-extending or retracting.

[0049] In this design, one end of both the first chain belt 61 and the second chain belt 63 is fixed near the center of the mounting plate 41, which increases the extension stroke of the second arm 4. When the first arm 3 extends, with the first chain seat 62 as a fixed reference, the first chain belt 61 moves downwards towards the first arm 3 under the pull of the first chain seat 62. The first chain belt 61 pulls the second arm 4 along it to move synchronously, causing the second arm 4 to extend. This allows the second arm 4 to extend below the pallet of the material 8 during the movement of the first arm 3, saving extension time and increasing efficiency. Furthermore, the extension and retraction movements of the first arm 3 and the second arm 4 can be driven by a single servo motor 71, resulting in lower costs.

[0050] When the first arm 3 and the second arm 4 need to retract, the servo motor 71 reverses, driving the drive gear 513 to rotate in the opposite direction. The drive gear 513 drives the rack 52 and the first arm 3 on it to retract. During the retraction of the first arm 3, the second chain seat 64 drives the second chain belt 63 to move in the retraction direction. The second chain belt 63 pulls the second arm 4 and the material 8 on it back relative to the first arm 3 to retract, completing the material handling operation.

[0051] Of course, in actual use, this cantilever telescopic mechanism 1 can also be used in conjunction with an external robotic arm or suction cup structure to pick up the materials taken out of the pallet, and transfer some of the materials taken out of the pallet to improve the material conveying efficiency.

[0052] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cantilever telescopic mechanism, characterized in that, The system includes a base (2), a first support arm (3) slidably disposed along the length of the base (2), a second support arm (4) slidably disposed along the length of the first support arm (3), a first transmission module (5) for driving the first support arm (3) to extend and retract, and a second transmission module (6) for driving the second support arm (4) to extend and retract; the second support arm (4) covers the outer periphery of the first support arm (3); the second support arm (4) includes a mounting plate (41), a first side plate (42) disposed on one side of the mounting plate (41), and a second side plate disposed on the other side of the mounting plate (41). (43) and multiple sets of first guide wheel sets (44); the first side plate (42) and the second side plate (43) are both screwed to the mounting plate (41); multiple sets of first guide wheel sets (44) are spaced apart on the inner sides of the first side plate (42) and the second side plate (43); the two outer sides of the first support arm (3) are simultaneously slidably connected to the pulley surface of the first guide wheel set (44); multiple sets of second guide wheel sets (25) are spaced apart on both sides of the base (2), and the two inner sides of the first support arm (3) are simultaneously slidably connected to the pulley surface of the second guide wheel set (25).

2. The cantilever telescopic mechanism according to claim 1, characterized in that, The first guide wheel assembly (44) includes at least one first vertical guide wheel (441), a first mounting seat (442) for mounting the first vertical guide wheel (441), at least one first horizontal guide wheel (444), and a second mounting seat (443) for mounting the first horizontal guide wheel (444). The diameter of the first vertical guide wheel (441) is vertically arranged and parallel to the outer side of the first support arm (3). The diameter of the first horizontal guide wheel (444) is horizontally arranged and perpendicular to the outer side of the first support arm (3). The first mounting seat (442) and the second mounting seat (443) are both screwed to the corresponding first side plate (42) and second side plate (43).

3. The cantilever telescopic mechanism according to claim 2, characterized in that, The lower end of the first side plate (42) is provided with a recessed mounting groove; the first mounting base (442) includes an L-shaped first base body (4421), a first bearing seat (4422), and a second base body (4423); one end of the first base body (4421) is screwed to the top wall of the mounting groove, and the other end of the first base body (4421) is located on the outer side of the first side plate (42) and abuts against the lower surface of the first bearing seat (4422); the first bearing seat (4423) 2) One end is located outside the first side plate (42), and the other end of the first bearing seat (4422) passes through the first side plate (42) and is connected to the first vertical guide wheel (441); the second seat (4423) is screwed to the first side plate (42) and is located above the first bearing seat (4422), and the lower surface of the second seat (4423) cooperates with the upper surface of the other end of the first seat (4421) to clamp and fix the first bearing seat (4422).

4. The cantilever telescopic mechanism according to claim 2, characterized in that, The first side plate (42) is provided with a fixing groove for mounting the second mounting base (443) and the first horizontal guide wheel (444); the second mounting base (443) includes a connecting shaft (4431), a third seat (4432) connected to one end of the connecting shaft (4431), and a fourth seat (4433) connected to the other end of the connecting shaft (4431); the middle part of the third seat (4432) is protruding and snapped into the upper end of the fixing groove, and the third seat (4432) of... Both ends abut against the inner sidewall of the second side plate (43) and are screwed to the second side plate (43); the middle part of the fourth seat (4433) protrudes and is snapped into the lower end of the fixing groove, and both ends of the fourth seat (4433) abut against the inner sidewall of the second side plate (43) and are screwed to the second side plate (43); the first horizontal guide wheel (444) is fitted on the connecting shaft (4431) and is located between the third seat (4432) and the fourth seat (4433).

5. The cantilever telescopic mechanism according to claim 1, characterized in that, The first support arm (3) includes a fixed plate (31), a first limiting plate (32) installed on one side of the fixed plate (31), and a second limiting plate (33) installed on the other side of the fixed plate (31); the outer sidewalls of the first limiting plate (32) and the second limiting plate (33) are each provided with a first sliding groove (34) along their length direction, and the inner sidewalls of the first limiting plate (32) and the second limiting plate (33) are each provided with a second sliding groove (35) along their length direction; the first guide wheel assembly (44) is slidably disposed in the first sliding groove (34), and the second guide wheel assembly (25) is slidably disposed in the second sliding groove (35).

6. The cantilever telescopic mechanism according to claim 5, characterized in that, The first limiting plate (32) and the second limiting plate (33) have the same structure and are both set as I-beam structures.

7. The cantilever telescopic mechanism according to claim 1, characterized in that, The base (2) includes a first frame (21), a second frame (22) arranged parallel to the first frame (21), multiple connecting plates (23) connected to the lower ends of the first frame and the second frame (22), and two end caps (24); each end of the first frame (21) and the second frame (22) is screwed to an end cap (24); the multiple connecting plates (23) are spaced apart along the length of the first frame (21) to fix the first frame (21) and the second frame (22); multiple sets of second guide wheel sets (25) are spaced apart on the outer side walls of the first frame (21) and the second frame (22).

8. The cantilever telescopic mechanism according to claim 1, characterized in that, The first transmission module (5) includes multiple sets of gears (51) and racks (52). The multiple sets of gears (51) are arranged sequentially and spaced apart in the base (2), and adjacent sets of gears (51) are meshed together. The rack (52) is fixed on the first support arm (3) and located above the multiple sets of gears (51), and the rack (52) is meshed with the multiple sets of gears (51).

9. The cantilever telescopic mechanism according to claim 8, characterized in that, The gear set (51) includes a first rotating rod (511), a second rotating rod (512), a driving gear (513), and a driven gear (514); the first rotating rod (511) and the second rotating rod (512) are spaced apart on the base (2), the driving gear (513) is fitted on the first rotating rod (511), and the driving gear (513) meshes with the rack (52); the driven gear (514) is fitted on the second rotating rod (512), and the driven gear (514) meshes with the adjacent driving gear (513); one of the first rotating rods (511) is connected to the output end of an external servo motor (71).

10. The cantilever telescopic mechanism according to claim 1, characterized in that, A second transmission module (6) is provided between the first support arm (3) and the second support arm (4). The second transmission module (6) includes a first chain belt (61), a first chain seat (62), a second chain belt (63), and a second chain seat (64). The first chain seat (62) is fixed to one end of the first support arm (3), and the second chain seat (64) is fixed to the other end of the second support arm (4). One end of the first chain belt (61) is fixed to the lower surface of the mounting plate (41), and the other end of the first chain belt (61) is engaged with the first chain seat (62) and passes through the second support arm (4) between the first support arm (3) and the base (2). One end of the second chain belt (63) is fixed to the lower surface of the mounting plate (41), and the other end of the second chain belt (63) is engaged with the second chain seat (64) and passes through the first support arm (3) between the first support arm (3) and the base (2).

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