Packing machine and linkage structure thereof

Abstract

The linkage structure comprises a mounting plate and a connecting rod, the middle of the connecting rod is rotationally connected to the mounting plate, a pawl used for being connected with a ratchet wheel in a clamped mode is arranged at one end of the connecting rod, a pressing rod is arranged at the other end of the connecting rod, and the pressing rod moves downwards to drive a friction moving block to be lifted up. In actual use, after the tensioning wheel is tensioned, the handle is lifted to rotate relative to the movable frame part, the pawl can be lifted to be separated from the ratchet wheel through the connecting pin, meanwhile, the pressing rod at the other end of the connecting rod moves downwards to press the pressing rod downwards to achieve automatic lifting of the welding assembly, a packing belt can be conveniently put in, the operation steps are effectively simplified, and the production efficiency is improved. And the operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the field of packing machines, in particular to a packing machine and its linkage structure. Background Art

[0002] An electric packing machine refers to a kind of bundling machine that bundles packing belts in an electric tightening, friction buckling, and automatic tape cutting manner. After winding a plastic steel belt or a plastic packing belt around an object to be bundled from top to bottom, the joint of the packing belt is placed into the working slot of the machine. The motor drives the tightening wheel to tighten the packing belt, and the belt is bonded by driving the friction block to reciprocate and rub to form a buckle. Finally, the tape is automatically cut.

[0003] The existing packing machine mainly includes a welding mechanism and a tightening mechanism. The tightening mechanism includes a tightening wheel, and the welding mechanism includes a welding assembly. The welding assembly includes a friction moving block and a friction static block. The packing belt is tightened by the tightening wheel of the tightening mechanism, then the friction moving block is lifted, and the packing belt is placed between the friction moving block and the friction static block. Finally, the welding and fixing are realized by driving the friction moving block to reciprocate. Among them, a ratchet wheel for realizing the one-way rotation of the tightening wheel is provided in the tightening mechanism to make the tightening wheel not easy to slip to achieve a better tightening effect. However, in the actual operation process, the one-way release of the ratchet wheel and the lifting of the friction moving block need to be operated independently, resulting in inconvenient operation, which needs to be further improved. Summary of the Utility Model

[0004] In order to further improve the convenience of operation, the present application provides a linkage structure of a packing machine.

[0005] The present application provides a linkage structure of a packing machine, adopting the following technical solutions:

[0006] A linkage structure of a packing machine includes a mounting plate and a connecting rod. The middle part of the connecting rod is rotatably connected to the mounting plate. One end of the connecting rod is provided with a pawl for engaging with the ratchet wheel, and the other end of the connecting rod is provided with a pressing rod. The pressing rod moves downward to drive the friction moving block to lift.

[0007] Optionally, the pressing rod is vertically arranged and threadedly connected to one end of the connecting rod.

[0008] The present application also provides a packing machine, which has the advantages of convenient operation, simplified structure, and low cost, adopting the following technical solutions:

[0009] A packing machine includes the above-mentioned linkage structure, and further includes a driving source, a base, a welding mechanism, and a tensioning mechanism. The driving source includes an output shaft. A first linkage member linked to the welding mechanism is arranged on the output shaft, and a second linkage member linked to the tensioning mechanism is arranged on the output shaft. A first one-way bearing connecting the two is arranged between the first linkage member and the output shaft, and a second one-way bearing connecting the two is arranged between the second linkage member and the output shaft. The driving directions of the first one-way bearing and the second one-way bearing are opposite.

[0010] Optionally, the tensioning mechanism includes a movable frame and a tensioning wheel. One side of the movable frame is hinged to the base. A return spring connecting the two is arranged between the movable frame and the base. The return spring is used to drive the movable frame to press down and reset. The tensioning wheel is rotatably connected to the movable frame. A first transmission assembly connecting and driving the two is arranged between the tensioning wheel and the second linkage member. A ratchet wheel is rotatably connected to the mounting plate, and a transmission member driving the tensioning wheel is arranged on the ratchet wheel.

[0011] Optionally, the first transmission assembly includes a first planetary gear reduction group and a bevel gear group. The bevel gear group includes a driving bevel gear and a driven bevel gear. The driving bevel gear is rotatably connected to the base and is connected and driven to the output end of the first planetary gear reduction group. The driven bevel gear is connected to the tensioning wheel. The input end of the first planetary gear reduction group is connected and driven to the second linkage member. The mounting plate protrudes with a mounting portion. A transmission shaft is rotatably connected to the mounting portion. Transmission bevel gears are arranged at both ends of the transmission shaft. The transmission bevel gears at both ends are respectively meshed with the driving bevel gear and the driven bevel gear.

[0012] Optionally, the welding mechanism includes a fixing plate, a base, a friction moving block, and a friction static block. The friction moving block is horizontally slidably connected to the base. The friction static block is fixedly arranged below the base corresponding to the friction moving block. A linkage rod is hinged to the friction moving block. The end of the linkage rod away from the hinge block is rotatably connected to the fixing plate through an eccentric wheel. A gear group connecting and driving the two is arranged between the eccentric wheel and the first linkage member.

[0013] Optionally, a movable block is hinged to the top of the base. A connecting rod inserted and slidably connected to it is arranged on the movable block. A rotating rod is rotatably connected to the mounting plate. One end of the rotating rod is hinged to the end of the connecting rod away from the movable block. An elastic member connecting the two is arranged between the connecting rod and the movable block. A driving ring linked to the first linkage member is rotatably connected to the mounting plate. The driving ring protrudes with a convex block. A abutting member is arranged on the rotating rod. After the convex block abuts against the abutting member and drives the rotating rod to rotate, the hinge point of the connecting rod and the rotating rod is higher than the connection line between the rotation center of the rotating rod and the hinge point of the movable block.

[0014] Optionally, the abutting member includes an arc rod, an extension portion extends from the rotating rod, one end of the arc rod is rotatably connected to the mounting portion, the other end is provided with an abutting wheel for abutting against the bump, a pressing portion extends from the end of the arc rod away from the abutting wheel, the pressing portion is located below the pressing rod and abuts against the pressing rod.

[0015] Optionally, a limiting rod extends from the rotating rod, and a limiting groove for the limiting rod to move is formed on the arc rod.

[0016] Optionally, a handle is provided on the movable frame, one end of the handle is rotatably connected to the movable frame, a connecting pin is also inserted through the handle, a movable groove for the connecting pin to pass through is formed on the movable frame, the movable groove allows the connecting pin to move up and down, one end of the connecting pin is located below the end of the connecting rod for lifting the ratchet pawl to disengage from the ratchet wheel, and a elastic piece is fixedly arranged on the movable frame, one side of the elastic piece is used to press against the top wall of the end of the connecting rod provided with the ratchet pawl, and the elastic piece is used to drive the connecting rod to rotate and reset to the state where the ratchet pawl is engaged with the ratchet wheel.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. Through the design of the linkage structure, during actual use, after the tensioning wheel completes the tensioning, when the handle is lifted, the part of the handle relative to the movable frame rotates, and by means of the connecting pin, the ratchet pawl can be lifted to disengage from the ratchet wheel. At the same time, the pressing rod at the other end of the connecting rod moves down to press the pressing portion, realizing the automatic lifting of the welding assembly, which is convenient for putting in the packing belt, effectively simplifies the operation steps, and the operation has better convenience;

[0019] 2. Through the design of the first one-way bearing and the second one-way bearing with opposite directions, the working states of the welding mechanism and the tensioning mechanism can be switched with different rotation directions of the driving source, which can be achieved with only one driving source, effectively simplifies the structure and reduces the overall cost;

[0020] 3. When the driving source is started, the driving drive ring rotates to make the bump contact the abutting member and drive the rotating rod to rotate, so that the hinge point of the rotating rod and the connecting rod is higher than the connection line of the rotating point of the rotating rod and the hinge point of the movable block. Under the action of the elastic member, the welding assembly is automatically pressed down, and at the same time, the friction moving block is driven to reciprocate under the transmission of the gear set to realize welding, automatically realizing the pressing down of the welding assembly, effectively improving the convenience of operation, and can be achieved without an additional driving source, saving energy and reducing costs at the same time;

[0021] 4. By connecting and driving the transmission bevel gears at both ends of the transmission shaft with the driving bevel gear and the driven bevel gear respectively, the transmission bevel gears always remain in the meshing state during the lifting or lowering process of the movable frame, and there will be no separation phenomenon, effectively ensuring the smoothness and durability of the transmission, and there will be no jamming or damage to the transmission teeth. Description of the Drawings

[0022] Figure 1 It is the overall structure diagram of the first perspective of Embodiment 1.

[0023] Figure 2 It is the overall structure diagram of the second perspective of Embodiment 1.

[0024] Figure 3 It is the sectional view of Embodiment 1 at the drive source.

[0025] Figure 4 It is the structure diagram of the tensioning mechanism in Embodiment 1.

[0026] Figure 5 It is Figure 4 The structure diagram after hiding the base.

[0027] Figure 6 It is the transmission structure diagram of the tensioning wheel in Embodiment 1.

[0028] Figure 7 It is the structure diagram of the connection between the ratchet and the pawl in Embodiment 1.

[0029] Figure 8 It is the structure diagram of the connection between the handle and the movable frame after the handle explodes in Embodiment 1.

[0030] Figure 9 It is the structure diagram of the welding mechanism in Embodiment 1.

[0031] Figure 10 It is the structure diagram of the connection between the first linkage and the welding assembly in Embodiment 1.

[0032] Figure 11 It is the connection structure diagram between the welding assembly and the rotating rod in Embodiment 1.

[0033] Figure 12 It is the structure diagram of the drive ring in Embodiment 1.

[0034] Figure 13 It is the structure diagram of the perspective at the cutter in Embodiment 1.

[0035] Figure 14 It is the structure diagram of the friction moving block in Embodiment 1.

[0036] Figure 15 It is the structure diagram of the welding mechanism in Embodiment 2.

[0037] Description of the Reference Numerals:

[0038] 1. Base; 2. Driving source; 3. Welding mechanism; 4. Tensioning mechanism; 5. Driving motor; 6. Output shaft; 7. Coupling; 8. First linkage; 9. Second linkage; 10. First one-way bearing; 11. Second one-way bearing; 12. Movable frame; 13. Tensioning wheel; 14. Mounting plate; 15. First planetary gear reduction group; 16. Driving bevel gear; 17. Driven bevel gear; 18. Mounting part; 19. Transmission shaft; 20. Transmission bevel gear; 21. Driving spur gear; 22. Driven spur gear; 23. Transmission spur gear; 24. Ratchet; 25. Pawl; 26. Reduction gear; 27. Link; 28. Operating end; 29. Pressing rod; 30. Mounting groove; 31. Handle; 32. Rotating shaft; 33. Connecting pin; 34. Movable groove; 35. Fixed plate; 36. Welding assembly; 37. Base; 38. Friction moving block; 39. Friction static block; 40. Movable block; 41. Connecting rod; 42. Elastic member; 43. Rotating rod; 44. Contact member; 45. Driving ring; 46. Second planetary gear reduction group; 47. Protrusion; 48. Extension part; 49. Contact wheel; 50. Pressing part; 51. Limiting rod; 52. Limiting groove; 53. Linking rod; 54. Eccentric wheel; 55. Gear set; 56. Lower tensioning plate; 57. Return spring; 58. Elastic column; 59. Elastic sheet; 60. Baffle; 61. Blocking part; 62. Cutting knife; 63. Cutting teeth; 64. Limiting sleeve; 65. Limiting screw; 66. Chute; 67. Groove body; 68. Welding teeth; 69. Screw pin; 70. Steel ball; 71. Chamber; 72. Return tension spring; 73. Limiting part; 74. Return torsion spring. Detailed implementation manners

[0039] The following will further describe the present application in detail with reference to the Figures 1 - 15 accompanying drawings.

[0040] Embodiment 1

[0041] A strapping machine, as Figure 1 shown in Figure 2 the figure, includes a base 1, a driving source 2, a welding mechanism 3 and a tensioning mechanism 4. The driving source 2 is fixedly installed on the base 1, and the welding mechanism 3 and the tensioning mechanism 4 are respectively driven to work by the driving source 2.

[0042] As Figure 3 shown in the figure, the driving source 2 includes a driving motor 5 and an output shaft 6. A coupling 7 connecting the two is provided between the output shaft 6 and the output end of the driving motor 5. The output shaft 6 and the driving motor 5 are connected by the coupling 7. On the one hand, it makes the connection part have a certain flexible shock-absorbing effect, avoiding the situation of direct jamming due to non-concentricity caused by impurity particles. On the other hand, the output shaft 6 can be independently manufactured, and the motor shaft can also be made shorter, reducing the production difficulty and cost.

[0043] AsFigure 3 and Figure 4 As shown in Figure 4 , a first linkage member 8 and a second linkage member 9 are sequentially arranged on the output shaft 6 in the axial direction. The first linkage member 8 is used to connect and drive the welding mechanism 3, and the second linkage member 9 is used to be linked with the tensioning mechanism 4. A first one-way bearing 10 connecting the two is arranged between the first linkage member 8 and the output shaft 6, and a second one-way bearing 11 connecting the two is arranged between the second linkage member 9 and the output shaft 6. The driving directions of the first one-way bearing 10 and the second one-way bearing 11 are opposite. In this way, by using one driving source 2 and relying on its forward and reverse rotations, the working state switching of the welding mechanism 3 and the tensioning mechanism 4 can be realized. For example, when the driving source 2 rotates forward to drive the welding mechanism 3 to work, and the driving source 2 rotates reversely to drive the tensioning mechanism 4 to work, the number of driving sources 2 is saved, the overall structure is effectively simplified, and the overall cost is reduced.

[0044] As Figure 1 and Figure 5 shown in Figure 5 , the tensioning mechanism 4 includes a movable frame 12 and a tensioning wheel 13. The tensioning wheel 13 is rotatably connected to the movable frame 12. One end of the movable frame 12 is rotatably connected to the base 1 and can be lifted up and down. When the movable frame 12 is lifted up, the tensioning wheel 13 moves upward, and a space for placing the packing belt is formed between the tensioning wheel 13 and the base 1. Then, when the movable frame 12 is turned down, the tensioning wheel 13 can be pressed on the packing belt. Then, by driving the tensioning wheel 13 to rotate, the packing belt can be driven to be tensioned. The surface of the tensioning wheel 13 is evenly distributed with spiked portions for piercing into the packing belt to prevent relative sliding between the tensioning wheel 13 and the packing belt. A lower tensioning plate 56 is arranged corresponding to the lower part of the tensioning wheel 13 on the base 1. The lower tensioning plate 56 is fixed to the base 1 by screws. During use, the packing belt is placed between the lower tensioning plate 56 and the tensioning wheel 13.

[0045] As Figure 4 and Figure 5 shown in Figure 5 , a return spring 57 connecting the two is arranged between the movable frame 12 and the base 1. Both ends of the return spring 57 are respectively fixed to the movable frame 12 and the base 1 through fasteners. The return spring 57 is used to drive the movable frame 12 to press down and reset, so as to keep the tensioning wheel 13 tightly pressed on the packing belt.

[0046] As Figure 1 , Figure 5 and Figure 6As shown in the figure, a first transmission assembly for driving the tensioning wheel 13 and the second linkage member 9 is provided between them. An installation plate 14 is provided on the base 1. The first transmission assembly includes a first planetary gear reduction set 15 and a bevel gear set. The first planetary gear reduction set 15 is installed on the installation plate 14. The input end of the first planetary gear reduction set 15 is connected to the second linkage member 9 for transmission. The bevel gear set includes a driving bevel gear 16 and a driven bevel gear 17. The output end of the first planetary gear reduction set 15 is connected to the driving bevel gear 16 for transmission. The driven bevel gear 17 is connected to the tensioning wheel 13. The driving bevel gear 16 is rotatably connected to the base 1. A spur gear set for driving the two is provided between the output end of the first planetary gear reduction set 15 and the driving bevel gear 16. An installation portion 18 protrudes from the movable frame 12. A transmission shaft 19 is rotatably connected to the installation portion 18. Transmission bevel gears 20 are provided at both ends of the transmission shaft 19. The transmission bevel gears 20 at both ends are respectively engaged with the driving bevel gear 16 and the driven bevel gear 17. In this embodiment, the second linkage member 9 is a first bevel gear, and a second bevel gear engaged with the first bevel gear is provided at the input end of the first planetary gear reduction set 15.

[0047] In this way, the power on the output shaft 6 is first transmitted to the first planetary gear reduction set 15 for deceleration, then transmitted to the driving bevel gear 16 through the spur gear set, and finally transmitted to the tensioning wheel 13 through the transmission bevel gears 20 on the transmission shaft 19, driving the rotation of the tensioning wheel 13 to achieve tensioning. By means of the transmission bevel gears 20 at both ends of the transmission shaft 19 being respectively connected to the driving bevel gear 16 and the driven bevel gear 17 for transmission, the transmission bevel gears 20 always remain in an engaged state during the process of the movable frame 12 being lifted or lowered, and there will be no separation phenomenon, effectively ensuring the smoothness and durability of the transmission, and there will be no jamming or damage to the transmission teeth.

[0048] As Figure 5 and Figure 6 shown in the figure, the spur gear set includes a driving spur gear 21 and a driven spur gear 22. The driving spur gear 21 is connected to the output end of the first planetary gear reduction set 15. The driven spur gear 22 is connected to the core shaft of the driving bevel gear 16. The driven spur gear 22 and the driving spur gear 21 are transmitted through a transmission spur gear 23. A ratchet 24 engaged with the driving bevel gear 16 is rotatably connected to the installation plate 14. A transmission member is provided on the core shaft of the ratchet 24. The transmission member is a reduction gear 26 engaged with the driven spur gear 22. At the same time, a pawl 25 for unidirectionally clamping the ratchet 24 is also installed on the installation plate 14. By means of the cooperation of the pawl 25 and the ratchet 24, unidirectional transmission is achieved, so that the tensioning wheel 13 will not slip in the reverse direction during the process of pulling the packing belt, and the tensioning effect is better and more stable.

[0049] As Figures 5 - 7As shown, a linkage structure is provided on the mounting plate 14. The linkage structure includes a connecting rod 27. The middle of the connecting rod 27 is rotatably connected to the mounting plate 14. A pawl 25 is installed at one end of the connecting rod 27. The other end of the connecting rod 27 forms an operating end 28. A pressing rod 29 is vertically provided on the operating end 28. The pressing rod 29 is threadedly connected to the operating end 28. An installation groove 30 is formed at the end of the connecting rod 27. The pawl 25 is rotatably installed in the installation groove 30 by screws. There is an activity space in the installation groove 30 for partial rotation of the pawl 25. And an elastic column 58 that presses against the pawl 25 is elastically provided on the side wall of the installation groove 30. The elastic column 58 always presses tightly against the pawl 25 by the elastic force of the spring. In this way, when the ratchet wheel 24 rotates forward, the pawl 25 can rotate partially to ensure the normal rotation of the ratchet wheel 24. The pawl 25 can be lifted by the operating end 28 to disengage from the engagement with the ratchet wheel 24, realizing the release of the engaged state.

[0050] As Figure 7 and Figure 8 shown, a handle 31 is installed on the movable frame 12. One end of the handle 31 is rotatably connected to the movable frame 12 through a rotating shaft 32. And a connecting pin 33 is also penetrated through the handle 31. The connecting pin 33 penetrates through the handle 31 and the movable frame 12. An activity groove 34 for the connecting pin 33 to pass through is formed on the movable frame 12. The connecting pin 33 can move up and down appropriately in the activity groove 34. One end of the connecting pin 33 is located below the end of the connecting rod 27 where the pawl 25 is provided. In actual use, when holding the handle 31 and lifting it, first, the handle 31 rotates and lifts partially relative to the movable frame 12. At this time, the connecting pin 33 lifts the end of the connecting rod 27 to realize the disengagement of the pawl 25 from the engagement with the ratchet wheel 24. At this time, the tensioning wheel 13 is not restricted unidirectionally and will reverse and loosen under the inertia of the packing tape. Then, further lifting the handle 31 can drive the entire movable frame 12 and the tensioning wheel 13 to lift, avoiding the situation that it is difficult to lift due to the spiked part on the tensioning wheel 13 piercing into the packing tape. The operation is simple and convenient.

[0051] As Figures 6 - 8 shown, an elastic piece 59 is fixedly provided on the movable frame 12. One side of the elastic piece 59 extends to the top of the end of the connecting rod 27 where the pawl 25 is provided. The elastic piece 59 is used to drive the connecting rod 27 to rotate and reset to the state where the pawl 25 is engaged with the ratchet wheel 24. That is, after releasing the handle 31, under the action of the elastic piece 59, the pawl 25 can be reset to the engaged state with the ratchet wheel 24.

[0052] As Figure 8 shown, a baffle 60 for shielding the tensioning wheel 13 is provided on one side of the movable frame 12. A blocking portion 61 for blocking the packing tape extends from the bottom of the baffle 60. With the arrangement of the baffle 60, the packing tape can be laterally blocked during the tensioning process, avoiding the situation of lateral deviation of the packing tape during the tensioning process.

[0053] AsFigures 9 - 11 As shown, the welding mechanism 3 includes a fixing plate 35 and a welding assembly 36. The fixing plate 35 is vertically arranged and fixed on the base 1. The welding assembly 36 includes a base 37 and a friction moving block 38. The friction moving block 38 is horizontally slidably connected to the base 37. At the same time, a friction static block 39 is fixedly arranged below the base 1 corresponding to the friction moving block 38. In actual use, the packing belt is placed between the friction moving block 38 and the friction static block 39. After pressing down the friction moving block 38, the friction moving block 38 is driven to move horizontally back and forth to achieve welding and fixing.

[0054] As Figures 9 - 11 As shown, a movable block 40 is hinged on the base 37. A connecting rod 41 slidably connected to the movable block 40 is inserted into the movable block 40. An elastic member 42 connecting the two is arranged between the connecting rod 41 and the movable block 40, so as to realize the movable connection between the connecting rod 41 and the movable block 40. When the base 37 is pressed down, it can be applicable to packing belts of different thicknesses. The elastic member 42 is a compression spring. A rotating rod 43 is arranged on the fixing plate 35. One end of the rotating rod 43 is rotatably connected to the fixing plate 35, and the other end is hinged to the end of the connecting rod 41 away from the movable block 40. An abutting member 44 is arranged on the rotating rod 43. A driving ring 45 is rotatably connected to the fixing plate 35. A second transmission assembly connecting the driving ring 45 and the first linkage 8 is arranged between the driving ring 45 and the first linkage 8. In this embodiment, the second transmission assembly adopts a second planetary gear reduction group 46 to achieve multi-stage speed reduction. A convex block 47 is arranged on the side wall of the driving ring 45. When the driving ring 45 rotates, the convex block 47 contacts the abutting member 44 to drive the rotating rod 43 to rotate; when the welding assembly 36 is in the lifted state, the height of the hinge point between the connecting rod 41 and the rotating rod 43 is lower than the connection line between the rotation center of the rotating rod 43 and the hinge point of the movable block 40. When the driving ring 45 rotates and the convex block 47 contacts the abutting member 44 to drive the rotating rod 43 to rotate, the height of the hinge point between the connecting rod 41 and the rotating rod 43 is higher than the connection line between the rotation center of the rotating rod 43 and the hinge point of the movable block 40. At this time, under the action of the elastic member 42, the welding assembly 36 will be automatically driven to press down, without manual operation, effectively improving the convenience of operation.

[0055] As Figure 12 As shown, the convex block 47 protrudes from the outer wall of the driving ring 45. The convex block 47 is integrally arranged with the driving ring 45. The thickness of the convex block 47 gradually decreases along the circumference of the driving ring 45. The surface of the convex block 47 contacting the abutting wheel 49 is an arc surface. This makes the contact between the convex block 47 and the abutting wheel 49 smoother and less likely to get stuck, and reduces the contact area, making the fluency better when the two contact. Moreover, such a design makes the integrity of the convex block 47 and the driving ring 45 better, and it is not easy to break or be damaged during long-term contact and impact. The structural strength is better and it is more durable.

[0056] As Figures 9 - 11As shown in the figure, when the driving source 2 stops running and the bump 47 just stops at the contact angle position with the abutting member 44, there will be a situation where the rotating rod 43 and the welding assembly 36 cannot be reset, that is, the welding assembly 36 cannot be lifted well, resulting in jamming; in this embodiment, the abutting member 44 includes an arc rod, and an extension portion 48 for connecting the arc rod is extended on one side of the rotating rod 43. One end of the arc rod is rotatably connected to the extension portion 48, and the other end bypasses the rotation center of the rotating rod 43 and extends to be close to the driving ring 45. An abutting wheel 49 for abutting against the bump 47 is provided at the end of the arc rod away from the extension portion 48. The abutting wheel 49 is rotatably connected to the arc rod, and a pressing portion 50 is extended on one side of the arc rod. The pressing portion 50 is located on the side of the arc rod rotation connection point facing away from the abutting wheel 49; through such a setting, when it is necessary to lift and reset the welding assembly 36, when pressing down the pressing portion 50, the rotating rod 43 is driven to partially lift the abutting wheel 49 so that it does not contact the bump 47. At this time, the driving source 2 drives the driving ring 45 to rotate, which can avoid jamming, effectively ensuring the effective operation and use of the mechanism. In this embodiment, the abutting surface formed by the outward protrusion of the bump 47 is an arc surface, which makes the contact between the bump 47 and the abutting wheel 49 smoother and less likely to be stuck, and reduces the contact area, making the fluency better when the two contact each other.

[0057] As Figures 9 - 11 shown, a limiting rod 51 is extended on one side of the rotating rod 43, and at the same time, a limiting groove 52 for limiting the limiting rod 51 is provided on the abutting member 44. When the rotating rod 43 rotates, the limiting rod 51 moves in the limiting groove 52, which can effectively limit the rotation angle and avoid excessive rotation.

[0058] As Figure 2 、 Figure 7 and Figure 9 shown, the bottom end of the pressing rod 29 abuts against the pressing portion 50. When the handle 31 is appropriately lifted and one end of the connecting rod 27 is lifted by means of the connecting pin 33, after the ratchet pawl 25 disengages from the ratchet wheel 24, the pressing rod 29 at the other end of the connecting rod 27 drives the pressing portion 50 to press down. After the abutting member 44 rotates and the abutting wheel 49 is rotated and lifted, until the hinge point height of the connecting rod 41 and the rotating rod 43 is lower than the connection line between the rotation center of the rotating rod 43 and the hinge point of the movable block 40, at this time, under the action of the elastic member 42, the welding assembly 36 will be automatically driven to lift, which is convenient for the subsequent packing belt to be put in for welding, realizing the linkage between the release of the one-way clamping state of the tensioning wheel 13 and the automatic lifting of the welding assembly 36 after the tensioning is completed, effectively improving the operation convenience.

[0059] As Figures 9 - 11As shown in the figure, a linkage rod 53 is hinged to one side of the friction moving block 38. An eccentric wheel 54 is arranged inside one end of the linkage rod 53 away from the friction moving block 38. The eccentric wheel 54 is rotatably connected to the fixed plate 35. A gear set 55 for transmitting power between the eccentric wheel 54 and the first linkage member 8 is arranged therebetween. In this embodiment, the first linkage member 8 adopts a linkage straight tooth. The gear set 55 can achieve the purpose of speed reduction while realizing power transmission. A driving source 2 can synchronously achieve the automatic downward pressing of the welding assembly 36 and the horizontal reciprocating movement of the friction moving block 38, simplifying the structure and saving energy, effectively reducing the production cost. Moreover, the eccentric wheel 54 and the friction moving block 38 are connected through the linkage rod 53, which has better structural strength compared with direct connection.

[0060] As Figure 13 shown, a cutting knife 62 is arranged on the base 37. The bottom of the cutting knife 62 has cutting teeth 63. The cutting knife 62 is vertically slidably connected to the base 37. A limiting sleeve 64 is penetrated through the cutting knife 62. A limiting screw 65 is arranged inside the limiting sleeve 64. The cutting knife 62 is connected to the base 37 through the limiting screw 65. The cutting knife 62 has a sliding groove 66 for the vertical sliding of the limiting sleeve 64. A downward pressing spring is arranged on the top of the cutting knife 62. The downward pressing spring drives the cutting knife 62 to move downward to press the packing belt tightly. In this way, when the friction moving block 38 moves horizontally back and forth for welding, it will partially drive the packing belt to move horizontally. During this period, the cutting teeth 63 on the cutting knife 62 can synchronously cut the packing belt. The elastically arranged cutting knife 62 can meet packing belts of different thicknesses and has better applicability. A groove body 67 for installing and placing the friction static block 39 is arranged on the base 37. The opposite surfaces of the friction static block 39 and the friction moving block 38 both have welding teeth 68. The friction static block 39 is detachably connected to the base 1 through a screw pin 69, and the friction static block 39 can be independently disassembled and replaced.

[0061] As Figure 13 and Figure 14 shown, steel balls 70 are arranged between the friction moving block 38 and the base 37. Chambers 71 for the steel balls 70 to move are arranged on both sides of the friction moving block 38. The friction moving block 38 abuts against the base 37 by means of the steel balls 70, effectively reducing the friction resistance and enabling the friction moving block 38 to move horizontally back and forth relative to the base 37 more smoothly.

[0062] The working principle of the embodiment of the present application is as follows: first, the movable frame 12 is lifted up by the handle 31, and then the strapping belt is placed under the tensioning wheel 13, and then the movable frame 12 is pressed down so that the tensioning wheel 13 is pressed on the strapping belt, and the driving source 2 is turned on and rotates forward. At this time, with the help of the second linkage member 9, the second one-way bearing 11 rotates synchronously and finally transmits power to the tensioning wheel 13 to achieve tensioning. At this time, the first linkage member 8 is not linked with the driving source 2 under the action of the first one-way bearing 10. After the tensioning is completed, the handle 31 is held and lifted appropriately relative to the movable frame 12, and the connecting pin 33 on the handle 31 moves up to drive the pawl 25 on the connecting rod 27 to disengage from the clamping connection with the ratchet wheel 24, and the tensioning wheel 1 After the strapping belt is disengaged, it slides relatively under the action of its own inertia to be loosened, and when the ratchet 25 moves up to disengage the clamping connection, the pressing rod 29 is pressed down to drive the abutment 44 to rotate. After the abutment 44 is pressed and rotated, the welding assembly 36 is automatically lifted. At this time, the strapping belt can be placed on the friction static block 39, and then the driving source 2 is reversed to link the first linkage member 8 without linking with the second linkage member 9. The first linkage member 8 drives the driving ring 45 to rotate and drives the friction movable block 38 to reciprocate horizontally. The driving ring 45 rotates the protrusion 47 to contact the abutment wheel 49 to automatically press down the welding assembly 36, and the reciprocating movement of the friction movable block 38 is used to achieve the welding and fixing of the strapping belt.

[0063] Example 2

[0064] A packaging machine, such as Figure 15 As shown, the difference between it and Example 1 mainly lies in the difference in the welding mechanism 3. A reset spring 72 connecting the fixed plate 35 and the base 37 is arranged between the two. The reset spring 72 drives the base 37 to lift and reset. In this way, when the hinge point of the connecting rod 41 and the rotating rod 43 is lower than the line connecting the rotation center of the rotating rod 43 and the hinge point of the movable block 40, the base 37 will be automatically lifted up under the pulling and resetting action of the reset spring 72, which is convenient for the subsequent insertion of the packing tape.

[0065] like Figure 15 As shown, a limiting portion 73 is extended on the rotating rod 43, and the limiting portion 73 is used to abut the bottom of the end of the connecting rod 41. The limiting portion 73 abuts against the bottom of the connecting rod 41 to limit the rotation angle. When the limiting portion 73 abuts against the bottom of the connecting rod 41 during the rotation of the rotating rod 43, the base 37 completes the automatic downward movement and the friction block 38 is just in a horizontal state, which can achieve a good welding effect.

[0066] like Figure 15 As shown, a return torsion spring 74 is provided at the rotation connection of the abutment 44 to drive it to rotate and reset. When the pressing portion 50 is released after being pressed down, the return torsion spring 74 drives the abutment 44 to rotate and reset, thereby achieving good automatic reset of the abutment 44.

[0067] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A linkage structure of a packing machine, characterized in that: It includes a mounting plate (14) and a connecting rod (27). The middle of the connecting rod (27) is rotatably connected to the mounting plate (14). One end of the connecting rod (27) is provided with a pawl (25) for engaging with a ratchet wheel (24), and the other end of the connecting rod (27) is provided with a pressing rod (29). The downward movement of the pressing rod (29) is used to drive the friction moving block (38) to lift up.

2. The linkage structure of a packing machine according to claim 1, wherein: The pressing rod (29) is vertically arranged and threadedly connected to one end of the connecting rod (27).

3. A packing machine, characterized in that: It includes the linkage structure according to any one of claims 1-2, and further includes a driving source (2), a base (1), a welding mechanism (3) and a tensioning mechanism (4). The driving source (2) includes an output shaft (6). A first linkage member (8) linked to the welding mechanism (3) is arranged on the output shaft (6), and a second linkage member (9) linked to the tensioning mechanism (4) is arranged on the output shaft (6). A first one-way bearing (10) connecting the two is arranged between the first linkage member (8) and the output shaft (6), and a second one-way bearing (11) connecting the two is arranged between the second linkage member (9) and the output shaft (6). The driving directions of the first one-way bearing (10) and the second one-way bearing (11) are opposite.

4. A bundling machine according to claim 3, characterized in that: The tensioning mechanism (4) includes a movable frame (12) and a tensioning wheel (13). One side of the movable frame (12) is hinged to the base (1), and a return spring (57) connecting the two is arranged between the movable frame (12) and the base (1). The return spring (57) is used to drive the movable frame (12) to press down and reset. The tensioning wheel (13) is rotatably connected to the movable frame (12). A first transmission assembly connecting and driving the two is arranged between the tensioning wheel (13) and the second linkage member (9). A ratchet wheel (24) is rotatably connected to the mounting plate (14), and a transmission member for driving the tensioning wheel (13) is arranged on the ratchet wheel (24).

5. A packing machine according to claim 4, characterized in that: The first transmission assembly includes a first planetary gear reduction group (15) and a bevel gear group (55). The bevel gear group (55) includes a driving bevel gear (16) and a driven bevel gear (17). The driving bevel gear (16) is rotatably connected to the base (1) and is connected and driven to the output end of the first planetary gear reduction group (15). The driven bevel gear (17) is connected to the tensioning wheel (13). The input end of the first planetary gear reduction group (15) is connected and driven to the second linkage member (9). The mounting plate (14) is convexly provided with a mounting portion (18). A transmission shaft (19) is rotatably connected to the mounting portion (18). Transmission bevel gears (20) are arranged at both ends of the transmission shaft (19), and the transmission bevel gears (20) at both ends are respectively meshed with the driving bevel gear (16) and the driven bevel gear (17).

6. The packaging machine according to claim 3, wherein: The welding mechanism (3) includes a fixing plate (35), a base (37), a friction moving block (38), and a friction static block (39). The friction moving block (38) is horizontally slidably connected to the base (37). The friction static block (39) is fixedly arranged below the base (1) corresponding to the friction moving block (38). A linkage rod (53) is hinged to the friction moving block (38). One end of the linkage rod (53) far from the hinge block is rotationally connected to the fixing plate (35) through an eccentric wheel (54). A gear set (55) for connecting and driving the two is arranged between the eccentric wheel (54) and the first linkage (8).

7. A packing machine according to claim 6, characterized in that: An activity block (40) is hinged to the top of the base (37). A connecting rod (41) slidably connected to the activity block (40) is inserted into the activity block (40). A rotating rod (43) is rotationally connected to the mounting plate (14). One end of the rotating rod (43) is hinged to one end of the connecting rod (41) far from the activity block (40). An elastic member (42) for connecting the two is arranged between the connecting rod (41) and the activity block (40). A driving ring (45) linked to the first linkage (8) is rotationally connected to the mounting plate (14). The driving ring (45) is convexly provided with a convex block (47). An abutting member (44) is arranged on the rotating rod (43). After the convex block (47) abuts against the abutting member (44) to push the rotating rod (43) to rotate, the hinge point of the connecting rod (41) and the rotating rod (43) is higher than the connection line between the rotation center of the rotating rod (43) and the hinge point of the activity block (40).

8. A packing machine according to claim 7, characterized in that: The abutting member (44) includes an arc rod. An extension part (48) extends from the rotating rod (43). One end of the arc rod is rotationally connected to the mounting part (18), and the other end is provided with an abutting wheel (49) for abutting against the convex block (47). An abutting part (50) extends from the end of the arc rod far from the abutting wheel (49). The abutting part (50) is located below the pressing rod (29) and abuts against the pressing rod (29).

9. The packaging machine according to claim 8, characterized in that: A limiting rod (51) extends from the rotating rod (43). A limiting groove (52) for the limiting rod (51) to move is formed on the arc rod.

10. A packing machine according to claim 4, characterized in that: A handle (31) is arranged on the movable frame (12). One end of the handle (31) is rotationally connected to the movable frame (12). A connecting pin (33) is also inserted through the handle (31). A movable groove (34) for the connecting pin (33) to pass through is formed on the movable frame (12). The movable groove (34) allows the connecting pin (33) to move up and down. One end of the connecting pin (33) is located below the end of the connecting rod (27) for lifting the pawl (25) to disengage from the ratchet wheel (24). A spring piece (59) is fixedly arranged on the movable frame (12). One side of the spring piece (59) is used to press the top wall of the end of the connecting rod (27) provided with the pawl (25). The spring piece (59) is used to drive the connecting rod (27) to rotate and reset to the state where the pawl (25) is engaged with the ratchet wheel (24).

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