tricot machine weft selection mechanism

Abstract

The utility model relates to the field of warp knitting machine especially relates to warp knitting machine weft selecting mechanism, including mounting bracket, mounting bracket body is provided with second rotating lever, first rotating lever, mounting rod from top to bottom transversely, a plurality of line clamp plate limiting mechanisms are installed to mounting rod even arrangement transversely, the utility model discloses the accurate lifting of line selection frame is realized through traction mechanism cooperation extension spring, can realize the yarn that different wire bar draws out is selected simultaneously, effectively improved weft selecting precision and response speed, and the cooperation design of line clamp plate mechanism and line clamp plate limiting mechanism has realized the reliable clamping and release of yarn, simple structure, reliable action, yarn cutting frame adopts servo electric jar drive, cooperation yarn cutting mechanism and yarn guide mechanism, realized fast, accurate yarn cutting, avoid yarn waste, and wire bar is equipped with spring part and wire outlet, effectively guide and protect yarn, reduce friction and abrasion.

Description

Technical Field

[0001] This utility model relates to the field of warp knitting machine technology, and in particular to the weft selection mechanism of warp knitting machines. Background Technology

[0002] As a crucial piece of equipment in the textile industry, the performance of the weft selection mechanism in warp knitting machines directly impacts knitting efficiency and product quality. Existing warp knitting machine weft selection mechanisms mostly employ mechanical or pneumatic control methods, resulting in problems such as low weft selection accuracy, slow response speed, complex structure, and difficult maintenance. Particularly during multi-color weft yarn switching, traditional mechanisms often struggle to achieve rapid and accurate yarn selection and cutting, easily leading to misselection, yarn tangling, or incomplete cutting, resulting in low production efficiency and material waste. Furthermore, the clamping and releasing actions of existing weft selection mechanisms often rely on a single drive source, resulting in poor synchronization and difficulty adapting to the requirements of high-speed, high-density knitting. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a warp knitting machine weft selection mechanism.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The warp knitting machine weft selection mechanism includes a mounting frame. The mounting frame has a second rotating rod, a first rotating rod, and a mounting rod arranged horizontally from top to bottom. Multiple clamping plate limiting mechanisms are evenly arranged on the mounting rod. A yarn selection frame is symmetrically rotated and cooperates with each clamping plate limiting mechanism on the first rotating rod and the second rotating rod. A motor mounting frame is set below the mounting rod on the mounting frame. Yarn cutting frames are rotatably set at the ends of the second rotating rod on both sides of the mounting frame. The line selection frame includes a first rotating connecting rod, a clamping plate mounting plate, and a second rotating connecting rod. The first rotating connecting rod is rotatably mounted on a first rotating rod, and the second rotating connecting rod is rotatably mounted on a second rotating rod. The first rotating connecting rod and the second rotating connecting rod are rotatably connected through the clamping plate mounting plate. The front end of the first rotating connecting rod is rotatably connected to the bottom of the clamping plate mounting plate, and the tail end of the first rotating connecting rod is rotatably connected to a traction mechanism. The traction mechanism is mounted on the motor mounting bracket. A tension spring connector is provided at the bottom of the front end of the first rotating connecting rod, and a tension spring is connected to the tension spring connector. Multiple clamping plate mechanisms are evenly arranged and installed on the clamping plate mounting plate along the vertical direction. A guide bar is provided on the clamping plate mounting plate above each clamping plate mechanism. The clamping plate mechanism is opened and closed by contacting the clamping plate limiting mechanism.

[0005] In addition, a preferred structure is that a guide wheel rod is horizontally arranged on the mounting frame above the motor mounting frame, and multiple guide wheels are arranged on the guide wheel rod. A guide rod fixing plate and a guide rod fixing bracket for fixing the guide rod are arranged vertically in sequence on the side of the second rotating rod away from the first rotating rod.

[0006] Furthermore, in a preferred configuration, the yarn cutting frame includes a rotating support rod, the tail end of which is rotatably fitted at both ends of a second rotating rod. A cutting blade mounting plate is installed between the front ends of the rotating support rods on both sides. A sliding head is provided on the upper surface of the front end of the rotating support rod. Sliding rods are laterally slidably fitted on the sliding heads on both sides. Multiple yarn cutting mechanisms are evenly arranged along the horizontal direction on the sliding rods. Multiple yarn guiding mechanisms aligned with the yarn cutting mechanisms are evenly arranged along the horizontal direction on the cutting blade mounting plate. A servo electric cylinder is installed on the side wall frame of the rotating support rod on one side, away from the cutting blade mounting plate. The piston rod at the output end of the servo electric cylinder is assembled and connected to the sliding rod.

[0007] Furthermore, in a preferred configuration, the yarn cutting mechanism includes a blade mounting plate, a blade connecting plate, a first blade, and a second blade. The second blade is mounted on the cutting blade mounting plate, and the first blade is rotatably fitted onto the second blade. The outer surface of the first blade is connected to the blade connecting plate, and the end of the blade connecting plate away from the first blade is rotatably connected to the blade mounting plate. The blade mounting plate is mounted on a sliding rod. The yarn guiding mechanism includes mounting blocks, each mounted at the bottom of the cutting blade mounting plate. Yarn guide wheels are symmetrically and rotatably mounted on both sides of the mounting blocks, and the yarn guide wheels are located on the front side of the yarn cutting mechanism.

[0008] In addition, a preferred structure is that the conductor rod has through holes at both ends, a spring part is provided on the front end of the conductor rod, and a wire passage is provided on the front side of the conductor rod, which is located on the wire clamping plate mounting plate above the wire clamping plate mechanism.

[0009] In addition, a preferred structure is that the wire clamping plate mechanism includes a first wire clamping plate and a second wire clamping plate, the tail ends of the first wire clamping plate and the second wire clamping plate are stacked and mounted on the wire clamping plate mounting plate, the front end of the first wire clamping plate is provided with a first clamping plate, and the first clamping plate has a through hole in the middle. The second clamping plate has a second clamping plate at its front end. The second clamping plate is in contact with the first clamping plate. The second clamping plate has a limit movable post. The limit movable post is inserted into the through hole and moves. The limit movable post is squeezed by the clamping plate limit mechanism.

[0010] Furthermore, in a preferred configuration, the clamping plate limiting mechanism includes a limiting plate base, each of which is mounted on a mounting rod. A support plate is vertically mounted on the limiting plate base, and a clamping plate limiting head is provided at the top of the support plate. The clamping plate limiting head is used to squeeze and limit the movement of the movable column.

[0011] Furthermore, in a preferred configuration, the traction mechanism includes a motor, which is evenly distributed on a motor mounting frame. Each motor output end is equipped with a winding reel, on which a wire rope is wound. The top of the wire rope away from the winding reel is connected to a wire rope connector, which is rotatably connected to a first rotating connecting rod. The wire rope is guided by a guide wheel on a guide wheel rod.

[0012] The beneficial effects of this utility model are as follows: This invention achieves precise lifting and lowering of the yarn selection frame through a traction mechanism and a tension spring, enabling simultaneous selection of yarns drawn from different guide bars, effectively improving weft selection accuracy and response speed. Furthermore, the coordinated design of the yarn clamping plate mechanism and the yarn clamping plate limiting mechanism ensures reliable clamping and release of the yarn. The structure is simple and the operation is reliable. The yarn cutting frame is driven by a servo electric cylinder, which, together with the yarn cutting mechanism and the yarn guiding mechanism, achieves fast and accurate yarn cutting, avoiding yarn waste. The guide bars are equipped with spring parts and yarn guide openings, effectively guiding and protecting the yarn and reducing friction and wear. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the weft selection mechanism; Figure 2 This is the front view of the latitude selection mechanism; Figure 3 This is a structural diagram of the mounting bracket; Figure 4 This is a schematic diagram of the traction mechanism. Figure 5 This is a structural diagram of a single set of cable selectors; Figure 6 A schematic diagram of the structure of the conductor rod fixing plate; Figure 7 This is a schematic diagram of the wire clamping plate limiting mechanism; Figure 8 This is a schematic diagram of the cable selector frame. Figure 9 This is a schematic diagram of the wire clamping plate mechanism; Figure 10 A schematic diagram of the yarn cutting frame; Figure 11 This is a schematic diagram of the yarn guiding mechanism; Figure 12 This is a schematic diagram of the yarn cutting mechanism.

[0014] In the diagram: 01, mounting bracket; 011, mounting rod; 012, first rotating rod; 013, second rotating rod; 014, guide wheel rod; 015, motor mounting bracket; 016, conductor bar fixing bracket; 017, conductor bar fixing plate; 1, wire clamping plate limiting mechanism; 11, limiting plate base; 12, support plate body; 13, wire clamping plate limiting head; 2, yarn cutting frame; 21, rotating support rod; 22, sliding head; 23, sliding rod; 24, cutting blade mounting plate; 25, yarn guiding mechanism; 251, mounting block; 252, yarn guide wheel; 26, yarn cutting mechanism; 261, blade mounting plate; 262. Blade connecting plate; 263. First blade; 264. Second blade; 27. Servo electric cylinder; 3. Cable selection frame; 31. First rotating connecting rod; 311. Tension spring connector; 32. Cable clamping plate mounting plate; 33. Second rotating connecting rod; 4. Cable clamping plate mechanism; 41. First cable clamping plate; 42. First clamping plate; 43. Through hole; 44. Second cable clamping plate; 45. Second clamping plate; 46. Limiting movable column; 5. Wire rod; 51. Cable routing port; 52. Spring part; 6. Traction mechanism; 61. Motor; 62. Cable reel; 63. Wire rope; 64. Wire rope connector; 7. Tension spring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figure 1-12 The warp knitting machine weft selection mechanism includes a mounting frame 01. The mounting frame 01 has a second rotating rod 013, a first rotating rod 012, and a mounting rod 011 arranged horizontally from top to bottom. Multiple clamping plate limiting mechanisms 1 are evenly arranged along the horizontal direction on the mounting rod 011. A yarn selection frame 3 is symmetrically rotated and engaged on both sides of each clamping plate limiting mechanism 1 on the first rotating rod 012 and the second rotating rod 013. A motor mounting frame 015 is located below the mounting rod 011 on the mounting frame 01. Yarn cutting frames 2 are rotatably installed at both ends of the second rotating rod 013. The yarn selection frame 3 includes a first rotating connecting rod 31, a wire clamping plate mounting plate 32, and a second rotating connecting rod 33. The first rotating connecting rod 31 is rotatably installed on the first rotating rod 012, and the second rotating connecting rod 33 is rotatably installed on the second rotating rod 013. The first rotating connecting rod 31 and the second rotating connecting rod 33 are rotatably connected through the wire clamping plate mounting plate 32, which is used to install the wire clamping plate mechanism 4.

[0017] The first rotating connecting rod 31 is rotatably connected to the bottom of the clamping plate mounting plate 32 at its front end, and a traction mechanism 6 is rotatably connected to the tail end of the first rotating connecting rod 31. The traction mechanism 6 is mounted on the motor mounting bracket 015. A tension spring connector 311 is provided at the bottom of the front end of the first rotating connecting rod 31, and a tension spring 7 is connected to the tension spring connector 311. The top of the tension spring 7 is used to connect to the bottom of the mounting bracket 01, and the tension spring 7 is used to pull the first rotating connecting rod 31 to reset.

[0018] In addition, multiple clamping plate mechanisms 4 are evenly arranged and installed on the clamping plate mounting plate 32 along the vertical direction. A guide bar 5 is provided on the clamping plate mounting plate 32 above the clamping plate mechanism 4. The clamping plate mechanism 4 is opened and closed by contacting the clamping plate limiting mechanism 1. The guide bar 5 is used to pull the yarn out.

[0019] Meanwhile, a guide wheel rod 014 is horizontally arranged on the mounting frame 01 above the motor mounting frame 015. Multiple guide wheels are arranged on the guide wheel rod 014. On the mounting frame 01, on the other side away from the first rotating rod 012 of the second rotating rod 013, a guide rod fixing plate 017 and a guide rod fixing bracket 016 for fixing the guide rod 5 are arranged vertically in sequence. The guide rod fixing bracket 016 and the guide rod fixing plate 017 are used to fix the tail end of the guide rod 5.

[0020] Furthermore, the yarn cutting frame 2 includes a rotating support rod 21. The tail end of the rotating support rod 21 is rotatably engaged with the two ends of the second rotating rod 013. A cutting blade mounting plate 24 is installed between the front ends of the rotating support rods 21 on both sides. A sliding head 22 is provided on the upper surface of the front end of the rotating support rod 21. A sliding rod 23 is laterally slidably engaged on the sliding head 22 on both sides. Multiple yarn cutting mechanisms 26 are evenly arranged laterally on the sliding rod 23. Multiple yarn guiding mechanisms 25 aligned with the yarn cutting mechanisms 26 are evenly arranged laterally on the cutting blade mounting plate 24. A servo electric cylinder 27 is provided on the side wall frame of the rotating support rod 21 on one side away from the cutting blade mounting plate 24. The piston rod at the output end of the servo electric cylinder 27 is assembled and connected to the sliding rod 23. The servo electric cylinder 27 is used to push the sliding rod 23 to slide laterally.

[0021] Meanwhile, the yarn cutting mechanism 26 includes a blade mounting plate 261, a blade connecting plate 262, a first blade 263, and a second blade 264. The second blade 264 is mounted on the cutting blade mounting plate 24, and the first blade 263 is rotatably fitted onto the second blade 264. The outer surface of the first blade 263 is connected to the blade connecting plate 262, and the end of the blade connecting plate 262 away from the first blade 263 is rotatably connected to the blade mounting plate 261. The blade mounting plate 261 is mounted on the sliding rod 23. The yarn guiding mechanism 25 includes mounting blocks 251, all of which are located at the bottom of the cutting blade mounting plate 24. Yarn guide wheels 252 are symmetrically rotatably arranged on both sides of the mounting blocks 251. The yarn guide wheels 252 are all located on the front side of the yarn cutting mechanism 26 and are used for guiding the yarn.

[0022] In addition, the guide rod 5 has through holes at both ends, a spring part 52 is provided on the front end of the guide rod 5, and a thread passage 51 is provided on the front side of the guide rod 5. The thread passage 51 is located on the wire clamping plate mounting plate 32 above the wire clamping plate mechanism 4. The guide rod 5 is used for the yarn to pass through the middle, and plays the role of guiding and protecting the yarn.

[0023] Meanwhile, the clamping plate mechanism 4 includes a first clamping plate 41 and a second clamping plate 44. The tail ends of the first clamping plate 41 and the second clamping plate 44 are stacked on the clamping plate mounting plate 32. The front end of the first clamping plate 41 is provided with a first clamping plate 42, and a through hole 43 is opened in the middle of the first clamping plate 42. The front end of the second clamping plate 44 is provided with a second clamping plate 45, which is attached to the first clamping plate 42. A limiting movable post 46 is provided on the second clamping plate 45. The limiting movable post 46 is inserted into the through hole 43 and moves. The limiting movable post 46 is squeezed by the clamping plate limiting mechanism 1. The first clamping plate 42 and the second clamping plate 45 are used to clamp the yarn.

[0024] Furthermore, the clamping plate limiting mechanism 1 includes a limiting plate base 11, which is mounted on the mounting rod 011. A support plate 12 is vertically mounted on the limiting plate base 11, and a clamping plate limiting head 13 is provided on the top of the support plate 12. The clamping plate limiting head 13 is used to squeeze and limit the movement of the movable column 46. A conical surface is provided on the clamping plate limiting head 13 for squeezing and limiting the movable column 46.

[0025] Meanwhile, the traction mechanism 6 includes a motor 61, which is evenly distributed on the motor mounting bracket 015. Each output end of the motor 61 is equipped with a winding reel 62, on which a wire rope 63 is wound. The top of the wire rope 63 away from the winding reel 62 is connected to a wire rope connector 64. The wire rope connector 64 is rotatably connected to the first rotating connecting rod 31. The wire rope 63 is guided by the guide wheel on the guide wheel rod 014. The wire rope 63 pulls the first rotating connecting rod 31 to lift it up.

[0026] In this embodiment, when it is necessary to select one of the guide rods 5 on the wire selector 3 to pass through the yarn, the motor 61 drives the winding reel 62 to rotate, and with the traction of the tension spring 7, the winding reel 62 winds up and releases the wire rope 63, which can pull the first rotating connecting rod 31 to lift and lower, thereby realizing the lifting and lowering of the clamping plate mounting plate 32. This allows the limiting movable column 46 at different positions to contact the clamping plate limiting head 13, so that the clamping plate limiting head 13 squeezes the limiting movable column 46. The limiting movable column 46 moves at the through hole 43, and the second clamping plate 44 undergoes elastic deformation and opens, thereby separating the first clamping plate 42 and the second clamping plate 45 that were originally attached together. After the yarn passing through the thread outlet 51 is separated from the first clamping plate 42 and the second clamping plate 45, it is no longer clamped by them, and the yarn can be pulled out at this time.

[0027] When the yarn is pulled out, it moves between the open first blade 263 and the second blade 264, and is pulled out by the yarn guide wheel 252. When the yarn needs to be cut after being pulled out, the piston rod of the servo cylinder 27 extends, so that the sliding rod 23 slides on the sliding head 22. When the sliding rod 23 extends, the blade mounting plate 261 moves laterally, thereby driving the rotating connecting blade connecting plate 262 to move synchronously, thereby pushing the first blade 263 to rotate, so that it engages with the second blade 264 to cut the yarn.

[0028] After the yarn is cut, the motor 61 drives the winding reel 62, so that the clamping plate limit head 13 no longer abuts against the limit movable post 46, and the second clamping plate 44 is no longer abutted and resets, so that the first clamping plate 42 and the second clamping plate 45 re-clamp the yarn, so that each set of yarn selection frame 3, together with a separate motor 61, can simultaneously select the yarn pulled out by different guide bars 5.

[0029] In this invention, the traction mechanism 6, in conjunction with the tension spring 7, enables precise lifting and lowering of the yarn selection frame 3. This allows for the simultaneous selection of yarns drawn from different guide bars 5, effectively improving weft selection accuracy and response speed. Furthermore, the coordinated design of the clamping plate mechanism 4 and the clamping plate limiting mechanism 1 ensures reliable yarn clamping and release. The structure is simple and the operation is reliable. The yarn cutting frame 2 is driven by a servo cylinder 27, working in conjunction with the yarn cutting mechanism 26 and the yarn guiding mechanism 25 to achieve fast and accurate yarn cutting, avoiding yarn waste. The guide bar 5 is equipped with a spring part 52 and a yarn guide opening 51, effectively guiding and protecting the yarn and reducing friction and wear. The above description is merely a preferred embodiment of this invention, but the scope of protection of this invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this invention, based on the technical solution and inventive concept of this invention, should be included within the scope of protection of this invention.

Claims

1. A warp knitting machine weft selection mechanism, including a mounting frame (01), characterized in that, The mounting frame (01) has a second rotating rod (013), a first rotating rod (012), and a mounting rod (011) arranged horizontally from top to bottom. Multiple wire clamping plate limiting mechanisms (1) are evenly arranged on the mounting rod (011) along the horizontal direction. On the first rotating rod (012) and the second rotating rod (013), a wire selection frame (3) is symmetrically rotated and cooperated with on both sides of the wire clamping plate limiting mechanism (1). A motor mounting frame (015) is arranged below the mounting rod (011) on the mounting frame (01). A yarn cutting frame (2) is rotatably arranged on both ends of the second rotating rod (013) on the mounting frame (01). The cable selection frame (3) includes a first rotating connecting rod (31), a clamping plate mounting plate (32), and a second rotating connecting rod (33). The first rotating connecting rod (31) is rotatably mounted on the first rotating rod (012), and the second rotating connecting rod (33) is rotatably mounted on the second rotating rod (013). The first rotating connecting rod (31) and the second rotating connecting rod (33) are rotatably connected through the clamping plate mounting plate (32). The front end of the first rotating connecting rod (31) is rotatably connected to the bottom of the clamping plate mounting plate (32), and the tail end of the first rotating connecting rod (31) is rotatably connected to the traction mechanism (6). The traction mechanism (6) is mounted on the motor mounting bracket (015). A tension spring connector (311) is provided at the bottom of the front end of the first rotating connecting rod (31), and a tension spring (7) is connected to the tension spring connector (311). Multiple clamping plate mechanisms (4) are evenly arranged and installed on the clamping plate mounting plate (32) along the vertical direction. A guide rod (5) is provided on the clamping plate mounting plate (32) above the clamping plate mechanism (4). The clamping plate mechanism (4) is opened and closed by contacting the clamping plate limiting mechanism (1).

2. The warp knitting machine weft selection mechanism according to claim 1, characterized in that, The mounting frame (01) is horizontally arranged above the motor mounting frame (015) with a guide wheel rod (014) and multiple guide wheels. On the mounting frame (01), on the other side away from the first rotating rod (012) of the second rotating rod (013), a guide rod fixing plate (017) and a guide rod fixing bracket (016) for fixing the guide rod (5) are arranged vertically in sequence.

3. The warp knitting machine weft selection mechanism according to claim 1, characterized in that, The yarn cutting frame (2) includes a rotating support rod (21). The tail end of the rotating support rod (21) is rotatably engaged at both ends of the second rotating rod (013). A cutting blade mounting plate (24) is installed between the front ends of the rotating support rods (21) on both sides. A sliding head (22) is provided on the upper surface of the front end of the rotating support rod (21). A sliding rod (23) is slidably engaged on the sliding head (22) on both sides. Multiple yarn cutting mechanisms (26) are evenly arranged on the sliding rod (23) in the transverse direction. Multiple yarn guiding mechanisms (25) aligned with the yarn cutting mechanisms (26) are evenly arranged on the cutting blade mounting plate (24) in the transverse direction. A servo electric cylinder (27) is provided on the side wall frame of the rotating support rod (21) on one side away from the cutting blade mounting plate (24). The piston rod at the output end of the servo electric cylinder (27) is assembled and connected to the sliding rod (23).

4. The warp knitting machine weft selection mechanism according to claim 3, characterized in that, The yarn cutting mechanism (26) includes a blade mounting plate (261), a blade connecting plate (262), a first blade (263), and a second blade (264). The second blade (264) is mounted on the cutting blade mounting plate (24), and the first blade (263) is rotatably fitted on the second blade (264). The outer surface of the first blade (263) is connected to the blade connecting plate (262). The end of the blade connecting plate (262) away from the first blade (263) is rotatably connected to the blade mounting plate (261). The blade mounting plate (261) is mounted on the sliding rod (23). The yarn guiding mechanism (25) includes a mounting block (251), which is located at the bottom of the cutting blade mounting plate (24). Yarn guide wheels (252) are symmetrically rotated on both sides of the mounting block (251), and the yarn guide wheels (252) are located on the front side of the yarn cutting mechanism (26).

5. The warp knitting machine weft selection mechanism according to claim 1, characterized in that, The conductor rod (5) has through holes at both ends, a spring part (52) is provided on the front end of the conductor rod (5), and a wire passage (51) is provided on the front side of the conductor rod (5). The wire passage (51) is located on the wire clamping plate mounting plate (32) above the wire clamping plate mechanism (4).

6. The warp knitting machine weft selection mechanism according to claim 5, characterized in that, The clamping plate mechanism (4) includes a first clamping plate (41) and a second clamping plate (44). The tail ends of the first clamping plate (41) and the second clamping plate (44) are stacked on the clamping plate mounting plate (32). The front end of the first clamping plate (41) is provided with a first clamping plate (42), and a through hole (43) is opened in the middle of the first clamping plate (42). The second clamping plate (44) has a second clamping plate (45) at its front end. The second clamping plate (45) is in contact with the first clamping plate (42). The second clamping plate (45) is provided with a limiting movable post (46). The limiting movable post (46) is inserted into the through hole (43) and moves. The limiting movable post (46) is squeezed by the clamping plate limiting mechanism (1).

7. The warp knitting machine weft selection mechanism according to claim 6, characterized in that, The clamping plate limiting mechanism (1) includes a limiting plate base (11), which is mounted on the mounting rod (011). A support plate body (12) is vertically mounted on the limiting plate base (11), and a clamping plate limiting head (13) is provided on the top of the support plate body (12). The clamping plate limiting head (13) is used to squeeze the limiting movable column (46) to move.

8. The warp knitting machine weft selection mechanism according to claim 1, characterized in that, The traction mechanism (6) includes a motor (61), which is evenly distributed on the motor mounting frame (015). Each output end of the motor (61) is equipped with a winding reel (62), on which a wire rope (63) is wound. The top of the wire rope (63) away from the winding reel (62) is connected to a wire rope connector (64), which is rotatably connected to the first rotating connecting rod (31). The wire rope (63) is guided by the guide wheel on the guide wheel rod (014).

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