A clothesline rod welding device

Abstract

The application discloses a clothesline rod welding device and relates to the technical field of clothesline rod welding.The device comprises a workbench, the top of the workbench is provided with a supporting mechanism for stabilizing the butt joint of a long pipe and a short pipe, the top of the workbench is also provided with a pressing mechanism for avoiding the deviation of the long pipe, one side of the workbench is provided with a lifting mechanism for avoiding the droop of the long pipe, the side of the supporting mechanism is provided with an extruding mechanism for avoiding the deviation of the short pipe, and the side of the supporting mechanism is also provided with a pushing mechanism for pushing the short pipe to be attached to the surface of the long pipe. The two placing grooves are used for limiting the long pipe and the short pipe respectively through the supporting mechanism, the long pipe and the short pipe are naturally formed into a T-shaped structure that is perpendicular to each other, the end of the short pipe is accurately aligned with the long pipe, a rigid supporting structure is formed, the weight of the long pipe and the short pipe can be supported, the problems, such as skewing and eccentricity, that are common in manual operation are effectively avoided, and the symmetry and stability of the overall structure of the clothesline rod are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of clothesline welding technology, specifically to a clothesline welding device. Background Technology

[0002] In daily life, clothes drying racks are common household items used to hang clothes to dry naturally. Existing clothes drying racks, such as floor-standing racks, can be placed directly on the ground and are commonly available in X-shaped, butterfly-shaped, single-bar, and double-bar types. Among them, the single-bar and double-bar type has two short tubes welded to the outside of a long tube, with the short tubes perpendicular to the long tube, and the body of the short tubes welded to the end of the long tube.

[0003] However, clothes racks are usually made by workers manually positioning and welding two short tubes to the two ends of a long tube. This manual welding method is not only inefficient, but also requires high skill from the workers, and is prone to problems such as inaccurate positioning and unstable welding, thus affecting the quality and performance of the clothes rack.

[0004] Therefore, the present invention proposes a clothes drying rod welding device to make up for and improve the deficiencies of the prior art. Summary of the Invention

[0005] In view of the above problems, the present invention provides a clothesline welding device that can effectively solve the instability problem when manually connecting long and short pipes in the prior art. To achieve the above objective, the embodiments of this application provide the following technical solution: This invention discloses a clothes drying rod welding device, including a workbench. The top of the workbench is provided with a support mechanism for stabilizing the connection of a long tube and a short tube. The top of the workbench is also provided with a pressing mechanism to prevent the long tube from shifting. A lifting mechanism to prevent the long rod from drooping is provided on one side of the workbench. A squeezing mechanism to prevent the short tube from shifting is provided on the side of the support mechanism. A pushing mechanism to push the short tube to fit against the surface of the long tube is also provided on the side of the support mechanism. The support mechanism includes a base that is horizontally fixed to the upper surface of the workbench, a bracket that is also fixedly connected to the upper surface of the workbench, a vertical block that is vertically fixed to the top of the bracket, the vertical block being located at one end of the base, and a welding gun that is fixedly connected to the upper surface of the workbench.

[0006] Furthermore, the support mechanism also includes a first placement slot on the top of the base for placing a long tube, and the first placement slot is arranged along the length direction of the base. The vertical block has a second placement slot on the side near the base for placing a short tube, and the second placement slot is arranged along the vertical direction of the vertical block.

[0007] Furthermore, the pressing mechanism includes a rotating shaft that is horizontally and rotatably connected to the side of the support. First connecting rods are symmetrically fixedly connected to both ends of the rotating shaft, and a pressing plate for pressing down the long tube is fixedly connected between the ends of the two first connecting rods away from the rotating shaft.

[0008] Furthermore, the lower pressure plate has a receiving groove in the middle, which is located directly above the first placement groove.

[0009] Furthermore, the lifting mechanism includes a first slide rod that is slidably connected to the lower surface of the workbench. One end of the first slide rod is fixedly connected to a support plate for supporting the long tube, and the support plate is located on the side of the base away from the vertical block.

[0010] Furthermore, a vertical rod is fixedly connected to the end of the first slide bar away from the support plate. A first through groove is provided on the surface of the worktable. The vertical rod passes through the first through groove and extends to the bottom of the worktable. A horizontal plate is fixedly connected to the top of the vertical rod, and an arc-shaped block for pressing the upper surface of the lower pressure plate is fixedly connected to the bottom of the horizontal plate.

[0011] Furthermore, the extrusion mechanism includes rotating shafts symmetrically rotatably connected to the side of the vertical block, with an extrusion rod for pushing the short tube fixedly connected to the top of each rotating shaft, and a torsion spring sleeved on the outside of each rotating shaft. One end of the torsion spring is fixedly connected to the outside of the rotating shaft, and the other end of the torsion spring is fixedly connected to the side of the vertical block.

[0012] Furthermore, the pushing mechanism includes second through slots symmetrically opened on the side of the vertical block, each second through slot having a clamping plate slidably connected therein for clamping the short tube, each clamping plate having a lever rotatably connected to the side away from the second placement slot, and the lever having a second connecting rod rotatably connected to the end away from the clamping plate.

[0013] Furthermore, the pushing mechanism includes a second slide rod symmetrically fixedly connected to the side of the vertical block, a movable plate slidably connected to the outside of the second slide rod, the side of the movable plate being rotatably connected to the middle of the lever via a rotating shaft, and a return spring sleeved on the outside of the second slide rod, the return spring being located at the bottom of the movable plate.

[0014] Furthermore, each of the levers is fixedly connected to an extension rod on its side. A rectangular frame is fixedly connected to the end of the extension rod away from the lever. A fixing plate is fixedly connected to the side of the rectangular frame away from the extension rod. Ratchets are symmetrically provided on both sides of the fixing plate. The ratchet teeth engage with pawls. The pawls are rotatably connected to the side of the bracket. An elastic sheet is also fixedly connected to the side of the bracket. The side of the elastic sheet fits tightly against the side of the pawl.

[0015] The beneficial effects of this invention are as follows: 1. This device is equipped with a support mechanism. A first placement slot on the top of the base is used to stably place the long tube and ensure its axial position is fixed. At the same time, a second placement slot is opened on the side of the vertical block to insert and position the short tube. The two placement slots limit the long tube and the short tube respectively, so that they naturally form a vertically intersecting T-shaped structure, ensuring that the ends of the short tube and the long tube are precisely aligned. The angle is kept constant at ninety degrees during welding, forming a rigid support structure that can bear the weight of the long tube and the short tube and resist the thermal stress and slight vibration generated during welding. It effectively avoids the skewing and eccentricity problems common in manual operation, and significantly improves the symmetry and stability of the overall structure of the clothes drying rack.

[0016] 2. This device, through a pushing mechanism set on the vertical block, adopts a linkage structure of clamping plate, lever, moving plate and return spring, and is equipped with ratchet and pawl locking mechanism. After the operator releases the fixing plate, it can automatically push the short tube to the end of the long tube and maintain stable pressure to ensure that the contact surfaces of the two are completely in contact. During this process, no continuous manual force is required, avoiding misalignment, gaps or angle deviations caused by manual misalignment. This ensures the uniformity of the weld and the structural strength, and improves the consistency and appearance quality of the finished product.

[0017] 3. This device employs a mechanical linkage structure with a lifting mechanism and a pressing mechanism. When the support plate rises to support the far end of the long tube, the first sliding rod and vertical rod drive the horizontal plate and arc-shaped block to press down synchronously, pressing the pressing plate to rotate around the rotation axis, thereby pressing the middle of the long tube. This achieves simultaneous constraint on the far end and the middle of the long tube, preventing the far end of the long tube from sagging due to its own weight, and avoiding the upward floating or lateral sliding of the long tube during welding. This ensures the stability of the entire welding process and greatly reduces the welding failure rate caused by workpiece deformation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the support mechanism and the pressing mechanism of the present invention.

[0021] Figure 3 This is a side view of the lifting mechanism in this invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the vertical block in this invention.

[0023] Figure 5 In this invention Figure 4 Enlarged view of the structure at point A in the middle.

[0024] Figure 6 This is a three-dimensional structural diagram of the driving mechanism in this invention.

[0025] Figure 7 This is an exploded view of the extrusion mechanism in this invention.

[0026] The labels in the diagram represent: 10, workbench; 20, support mechanism; 201, base; 202, first placement slot; 203, bracket; 204, vertical block; 205, second placement slot; 206, welding gun; 30, pressing mechanism; 301, rotating shaft; 302, first connecting rod; 303, pressing plate; 304, receiving slot; 40, lifting mechanism; 401, first sliding rod; 402, support plate; 403, first through slot; 404, vertical rod; 40 5. Horizontal plate; 406. Arc-shaped block; 50. Extrusion mechanism; 501. Rotating shaft; 502. Extrusion rod; 503. Torsion spring; 60. Pushing mechanism; 601. Second through slot; 602. Clamping plate; 603. Lever; 604. Second slide rod; 605. Moving plate; 606. Second connecting rod; 607. Return spring; 608. Extension rod; 609. Rectangular frame; 610. Fixing plate; 611. Racket; 612. Pawl; 613. Elastic plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] The present invention will be further described below with reference to embodiments.

[0029] See Figures 1 to 7 This embodiment of a clothes drying rod welding device includes a workbench 10. The top of the workbench 10 is provided with a support mechanism 20 for stabilizing the connection of a long pipe and a short pipe. The top of the workbench 10 is also provided with a pressing mechanism 30 for preventing the long pipe from shifting. A lifting mechanism 40 for preventing the long rod from drooping is provided on one side of the workbench 10. A squeezing mechanism 50 for preventing the short pipe from shifting is provided on the side of the support mechanism 20. A pushing mechanism 60 for pushing the short pipe to fit against the surface of the long pipe is also provided on the side of the support mechanism 20.

[0030] The support mechanism 20 includes a base 201 that is horizontally fixedly connected to the upper surface of the workbench 10. A bracket 203 is also fixedly connected to the upper surface of the workbench 10. A vertical block 204 is vertically fixedly connected to the top of the bracket 203. The vertical block 204 is located at one end of the base 201. A welding gun 206 is fixedly connected to the upper surface of the workbench 10.

[0031] The support mechanism 20 also includes a first placement groove 202 on the top of the base 201 for placing long pipes, and the first placement groove 202 is arranged along the length of the base 201. A second placement groove 205 for placing short pipes is provided on the side of the vertical block 204 near the base 201, and the second placement groove 205 is arranged vertically along the vertical block 204. The first placement groove 202 and the second placement groove 205 can be designed as V-shaped, U-shaped or replaceable block structure according to the diameter of commonly used pipes, to adapt to different specifications of round pipes, square pipes and other profiles. Operators only need to put the pipes in and position them, without repeated adjustments, to achieve quick clamping.

[0032] In practice, when welding the clothesline, the long tube is placed in the first placement groove 202 at the top of the base 201, and the short tube is placed in the second placement groove 205 on the side of the vertical block 204. The two placement grooves limit the long tube and the short tube respectively, so that they naturally form a vertically intersecting T-shaped structure. This ensures that the ends of the short tube and the long tube are precisely aligned. The angle is kept constant at ninety degrees during welding, forming a rigid support structure that can bear the weight of the long tube and the short tube and resist the thermal stress and slight vibration generated during welding. This effectively avoids the problems of skewing and eccentricity that are common in manual operation, and significantly improves the symmetry and stability of the overall structure of the clothesline.

[0033] The pressing mechanism 30 includes a rotating shaft 301 that is horizontally and rotatably connected to the side of the support 203. First connecting rods 302 are symmetrically fixedly connected to both ends of the rotating shaft 301. A pressing plate 303 for pressing down long tubes is fixedly connected between the ends of the two first connecting rods 302 away from the rotating shaft 301.

[0034] The lower pressure plate 303 has a receiving groove 304 in the middle, which is located directly above the first placement groove 202.

[0035] In specific operation, after the long tube is placed in the first placement groove 202, the rotating shaft 301 drives the lower pressure plate 303 to press the long tube downward through the first connecting rod 302, so that the long tube is pressed into the first placement groove 202 of the base 201. The lower pressure plate 303 applies continuous pressure to the long tube from above, firmly pressing it into the first placement groove 202 of the base 201, forming a "top pressure and bottom support" clamping structure, which effectively suppresses the displacement and vibration of the workpiece in the vertical direction, ensures the smooth progress of the welding process, and avoids problems such as incomplete welding, arc breakage, or uneven weld caused by loose workpiece.

[0036] The lifting mechanism 40 includes a first slide rod 401 that is slidably connected to the lower surface of the workbench 10. One end of the first slide rod 401 is fixedly connected to a support plate 402 for supporting a long tube, and the support plate 402 is located on the side of the base 201 away from the vertical block 204.

[0037] A vertical rod 404 is fixedly connected to the end of the first slide bar 401 away from the support plate 402. A first through groove 403 is opened on the surface of the worktable 10. The vertical rod 404 passes through the first through groove 403 and the bottom of the vertical rod 404 extends to the bottom of the worktable 10. A horizontal plate 405 is fixedly connected to the top of the vertical rod 404. An arc-shaped block 406 for pressing the upper surface of the lower pressure plate 303 is fixedly connected to the bottom of the horizontal plate 405.

[0038] In practice, after the long tube is placed in the first placement slot 202, the support plate 402 is pulled away from the worktable 10. At the same time, the support plate 402 drives the first slide rod 401 to slide out from the bottom of the worktable 10. At this time, the far end of the long tube is supported by the support plate 402. Meanwhile, the first slide rod 401 drives the vertical rod 404 to slide in the first through slot 403. The vertical rod 404 simultaneously drives the horizontal plate 405 to move above the lower pressure plate 303. After the horizontal plate 405 moves above the lower pressure plate 303, the arc-shaped block 406 at the bottom of the horizontal plate 405 presses down on the lower pressure plate 303, so that the lower pressure plate 303 presses down tightly on the top of the long tube. The mechanism achieves downward pressure and fixation of the long tube through the mechanical linkage structure of the lifting mechanism 40 and the pressing mechanism 30. When the support plate 402 rises to support the far end of the long tube, the first slide rod 401 and the vertical rod 404 drive the horizontal plate 405 and the arc block 406 to press downward simultaneously, pressing the pressing plate 303 to rotate around the rotating axis 301, thereby pressing the middle part of the long tube. This achieves simultaneous constraint on the far end and the middle part of the long tube, which not only prevents the far end of the long tube from sagging due to its own weight, but also avoids the long tube from floating or sliding laterally during the welding process, ensuring the stability of the entire welding process and greatly reducing the welding failure rate caused by workpiece deformation.

[0039] The extrusion mechanism 50 includes a rotating shaft 501 symmetrically rotatably connected to the side of the vertical block 204. Each rotating shaft 501 has an extrusion rod 502 fixedly connected to its top to push the short tube. Each rotating shaft 501 is externally sleeved with a torsion spring 503. One end of the torsion spring 503 is fixedly connected to the outside of the rotating shaft 501, and the other end of the torsion spring 503 is fixedly connected to the side of the vertical block 204.

[0040] In actual operation, after the short pipe is placed in the second placement groove 205, the short pipe is pressed into the second placement groove 205 by the torsion of the torsion spring 503, effectively suppressing any loosening in the vertical direction and ensuring that the short pipe is always tightly attached to the end face of the long pipe during the welding process. At the same time, the pressing rod 502 is connected through the rotating shaft 501 and is provided with elastic clamping force by the torsion spring 503, which has good self-adjustment capability. When there are slight height differences between short pipes of different batches or specifications, the pressing rod 502 can automatically adjust the downward pressure according to its surface, ensuring sufficient clamping force and avoiding damage or deformation of the pipe surface due to rigid clamping.

[0041] The pushing mechanism 60 includes second through slots 601 symmetrically opened on the side of the vertical block 204. Each second through slot 601 is slidably connected to a clamping plate 602 for clamping a short tube. Each clamping plate 602 is rotatably connected to a lever 603 on the side away from the second placement slot 205. The lever 603 is rotatably connected to a second connecting rod 606 at the end away from the clamping plate 602.

[0042] The pushing mechanism 60 includes a second slide rod 604 symmetrically fixedly connected to the side of the vertical block 204. A movable plate 605 is slidably connected to the outside of the second slide rod 604. The side of the movable plate 605 is rotatably connected to the middle of the lever 603 via a rotating shaft. A return spring 607 is also sleeved on the outside of the second slide rod 604. The return spring 607 is located at the bottom of the movable plate 605.

[0043] Each lever 603 has an extension rod 608 fixedly connected to its side. A rectangular frame 609 is fixedly connected to the end of the extension rod 608 away from the lever 603. A fixing plate 610 is fixedly connected to the side of the rectangular frame 609 away from the extension rod 608. Rackets 611 are symmetrically provided on both sides of the fixing plate 610. The ratchet 611 engages with a pawl 612. The pawl 612 is rotatably connected to the side of the bracket 203. An elastic piece 613 is also fixedly connected to the side of the bracket 203. The side of the elastic piece 613 fits tightly against the side of the pawl 612.

[0044] In specific operation, after the short tube is placed in the second placement slot 205, the fixing plate 610 is pressed down. The fixing plate 610, through the rectangular frame 609 and the extension rod 608, drives the second connecting rod 606 to move downward. The second connecting rod 606 drives the lever 603 to rotate downward. The rotating lever 603 pushes the clamping plate 602 outward into the second through slot 601, so that the clamping plate 602 can clamp the outside of the short tube, thus clamping and fixing the short tube. Then, the pressing continues, causing the moving plate 605 to slide downward along the second sliding rod 604. The downward sliding moving plate 605 drives the clamped short tube to move downward in the second placement slot 205. The pushing mechanism 60, through the linkage design of the clamping plate 602, the lever 603, the moving plate 605 and the return spring 607, operates... After the fixing plate 610 is pressed down, the short pipe can be automatically pushed towards the end of the long pipe to make them fit tightly. This process effectively eliminates gaps or misalignments that often occur during manual assembly, ensuring that the contact surfaces of the two are completely fitted, providing an ideal joint state for subsequent fillet welding, avoiding welding defects such as incomplete fusion, slag inclusion, or insufficient strength caused by gaps, and significantly improving the firmness and sealing of the weld. When the fixing plate 610 is pressed down, the elastic force of the elastic plate 613 pushes the pawl 612 to always engage with the ratchet 611 of the fixing plate 610. After welding is completed, the pawl 612 is moved to disengage from the ratchet 611. Then, under the push of the return spring 607, the moving plate 605 moves upward along the second slide bar 604, and at the same time, the clamping plate 602 will release the clamp on the short pipe.

[0045] Working principle: The long tube is placed in the first placement slot 202 at the top of the base 201, and the short tube is placed in the second placement slot 205 on the side of the vertical block 204. The long tube and the short tube are supported and connected by the support mechanism 20, avoiding the skewing and eccentricity problems common in manual operation. At the same time, the lifting mechanism 40 supports the far end of the long tube. The lifting mechanism 40 applies pressure to the pressing mechanism 30 when supporting. The cooperation between the pressing mechanism 30 and the lifting mechanism 40 prevents the far end of the long tube from sagging due to its own weight, and also prevents the long tube from floating or sliding laterally during the welding process, ensuring the stability of the entire welding process. The short tube is fixed by the squeezing mechanism 50. After the long tube and the short tube are fixed, the pushing mechanism 60 drives the short tube to fit against the outside of the long tube, ensuring that the contact surfaces of the two are completely fitted, providing an ideal joint state for subsequent fillet welding.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A clothes drying rack welding device, characterized in that, The system includes a workbench (10), a support mechanism (20) for stabilizing the connection between long and short pipes is provided on the top of the workbench (10), a pressing mechanism (30) for preventing the long pipe from shifting is also provided on the top of the workbench (10), a lifting mechanism (40) for preventing the long rod from drooping is provided on one side of the workbench (10), a squeezing mechanism (50) for preventing the short pipe from shifting is provided on the side of the support mechanism (20), and a pushing mechanism (60) for pushing the short pipe to fit against the surface of the long pipe is also provided on the side of the support mechanism (20). The support mechanism (20) includes a base (201) that is horizontally fixedly connected to the upper surface of the workbench (10), a bracket (203) that is also fixedly connected to the upper surface of the workbench (10), a vertical block (204) that is vertically fixedly connected to the top of the bracket (203), the vertical block (204) that is located at one end of the base (201), and a welding gun (206) that is fixedly connected to the upper surface of the workbench (10). The support mechanism (20) further includes a first placement groove (202) opened on the top of the base (201) for placing a long tube, and the first placement groove (202) is arranged along the length direction of the base (201). The vertical block (204) is provided with a second placement groove (205) for placing a short tube on the side near the base (201), and the second placement groove (205) is arranged along the vertical direction of the vertical block (204). The pushing mechanism (60) includes a second through slot (601) symmetrically opened on the side of the vertical block (204). Each second through slot (601) is slidably connected with a clamping plate (602) for clamping a short tube. Each clamping plate (602) is rotatably connected with a lever (603) on the side away from the second placement slot (205). The lever (603) is rotatably connected with a second connecting rod (606) at the end away from the clamping plate (602). The pushing mechanism (60) further includes a second slide rod (604) symmetrically fixedly connected to the side of the vertical block (204). A movable plate (605) is slidably connected to the outside of the second slide rod (604). The side of the movable plate (605) is rotatably connected to the middle of the lever (603) through a rotating shaft. A return spring (607) is also sleeved on the outside of the second slide rod (604). The return spring (607) is located at the bottom of the movable plate (605). Each lever (603) is fixedly connected to an extension rod (608) on its side. A rectangular frame (609) is fixedly connected to the end of the extension rod (608) away from the lever (603). A fixing plate (610) is fixedly connected to the side of the rectangular frame (609) away from the extension rod (608). Ratchets (611) are symmetrically provided on both sides of the fixing plate (610). The ratchet (611) engages with a pawl (612). The pawl (612) is rotatably connected to the side of the bracket (203). An elastic sheet (613) is also fixedly connected to the side of the bracket (203). The side of the elastic sheet (613) is in close contact with the side of the pawl (612).

2. The clothesline welding device according to claim 1, characterized in that, The pressing mechanism (30) includes a rotating shaft (301) that is horizontally and rotatably connected to the side of the support (203). The two ends of the rotating shaft (301) are symmetrically fixedly connected with first connecting rods (302). A pressing plate (303) for pressing down long tubes is fixedly connected between the ends of the two first connecting rods (302) away from the rotating shaft (301).

3. The clothesline welding device according to claim 2, characterized in that, The lower pressure plate (303) has a receiving groove (304) in the middle, and the receiving groove (304) is located directly above the first placement groove (202).

4. The clothesline welding device according to claim 1, characterized in that, The lifting mechanism (40) includes a first slide rod (401) slidably connected to the lower surface of the workbench (10). One end of the first slide rod (401) is fixedly connected to a support plate (402) for supporting a long tube, and the support plate (402) is located on the side of the base (201) away from the vertical block (204).

5. A clothesline welding device according to claim 4, characterized in that, The first slide bar (401) is fixedly connected to a vertical rod (404) at one end away from the support plate (402). A first through groove (403) is provided on the surface of the worktable (10). The vertical rod (404) passes through the first through groove (403) and the bottom of the vertical rod (404) extends to the bottom of the worktable (10). A horizontal plate (405) is fixedly connected to the top of the vertical rod (404). An arc-shaped block (406) for pressing the upper surface of the pressure plate (303) is fixedly connected to the bottom of the horizontal plate (405).

6. The clothesline welding device according to claim 1, characterized in that, The extrusion mechanism (50) includes a rotating shaft (501) symmetrically rotatably connected to the side of the vertical block (204). Each rotating shaft (501) has an extrusion rod (502) for pushing a short tube fixedly connected to its top. Each rotating shaft (501) is externally sleeved with a torsion spring (503). One end of the torsion spring (503) is fixedly connected to the outside of the rotating shaft (501), and the other end of the torsion spring (503) is fixedly connected to the side of the vertical block (204).

Images