Welding mechanism of packing machine

Abstract

The welding mechanism comprises a base, a mounting plate and a welding assembly, a movable block is hinged to the welding assembly, a connecting rod connected with the movable block in a sliding mode is inserted into the movable block, an elastic piece for connecting the connecting rod with the movable block is arranged between the connecting rod and the movable block, and a rotating rod is rotationally connected to the mounting plate. One end of the rotating rod is hinged to the end, away from the movable block, of the connecting rod, an abutting part is arranged on the rotating rod, a driving source is arranged on the mounting plate, a driving ring is rotationally connected to the mounting plate, a protruding block used for making contact with the abutting part to drive the rotating rod to rotate is arranged on the driving ring, and a first transmission assembly for transmitting the driving ring and the driving source is arranged between the driving ring and the driving source; after the protruding block abuts against the abutting piece to push the rotating rod to rotate, the hinge point of the connecting rod and the rotating rod is higher than the connecting line of the rotating center of the rotating rod and the hinge point of the movable block, when the driving motor is started, the protruding block makes contact with the abutting piece and drives the rotating rod to rotate, the welding assembly is driven to automatically press downwards under the action of the elastic piece, and operation convenience is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of packing machines, in particular to a welding mechanism of a packing machine. Background Art

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

[0003] At present, the welding mechanism of the packing machine mainly includes a friction static block and a friction moving block. The packing belt is placed between the friction moving block and the friction static block, and then the friction moving block is moved down to press the packing belt, and the welding is realized by reciprocatingly driving the friction moving block to move. In actual use, manual pressing is required, which is not convenient to operate. Content of the Utility Model

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

[0005] The present application provides a welding mechanism of a packing machine, adopting the following technical scheme:

[0006] It includes a base, a mounting plate and a welding assembly. The welding assembly is hinged with a movable block. A connecting rod 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 far away from the movable block. An abutting member is arranged on the rotating rod. A driving source is arranged on the mounting plate. A driving ring is rotatably connected to the mounting plate. A convex block for contacting the abutting member to drive the rotating rod to rotate is arranged on the driving ring. A first transmission assembly for transmitting the two is arranged between the driving ring and the driving source. After the convex block abuts against the abutting member and pushes 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.

[0007] Optionally, the welding assembly includes a base and a friction moving block. A friction static block is arranged on the base corresponding to the friction moving block. A connecting rod is connected to the friction moving block. One end of the connecting rod is hinged to the friction moving block, and the other end is provided with an eccentric wheel for driving it to reciprocate. A second transmission assembly for transmitting the two is arranged between the eccentric wheel and the driving source.

[0008] Optionally, the driving source includes a driving motor and an output shaft. A coupling for connecting the two is arranged between the driving motor and the output shaft.

[0009] Optionally, the second transmission assembly includes a driving gear, a transmission gear, and a driven gear. The driving gear is mounted on the output shaft, the driven gear is mounted on the eccentric wheel, and both sides of the transmission gear are meshed with the driving gear and the driven gear respectively.

[0010] Optionally, the first transmission assembly includes a planetary gear reduction set. The input end of the planetary gear reduction set is connected to the driving source, and the output end of the planetary gear reduction set is connected to the driving ring.

[0011] Optionally, the abutting member includes an arc-shaped rod. An installation portion extends from the rotating rod. One end of the arc-shaped rod is rotatably connected to the installation portion, and the other end is provided with an abutting wheel for abutting against the convex block.

[0012] Optionally, a limiting rod extends from the rotating rod, and a limiting groove for the limiting rod to move is formed in the arc-shaped rod.

[0013] Optionally, a pressing portion extends from the end of the arc-shaped rod away from the abutting wheel.

[0014] Optionally, a reset tension spring for connecting the mounting plate and the base is provided between the mounting plate and the base, and the reset tension spring drives the base to lift and reset.

[0015] Optionally, the convex block protrudes from the outer wall of the driving ring. The convex block is integrally provided with the driving ring. The thickness of the convex block gradually decreases along the circumference of the driving ring, and the surface of the convex block contacting the abutting member is an arc surface.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. When the driving motor is started, the driving ring is driven to rotate, so that the convex block contacts the abutting member and drives the rotating rod to rotate, making the hinge point between the rotating rod and the connecting rod higher than the connection line between the rotating point of the rotating rod and the hinge point of the moving block. Under the action of the elastic member, the welding assembly is driven to automatically press down. Synchronously, under the transmission of the second transmission assembly, the friction moving block is driven to reciprocate to achieve welding. The automatic pressing down of the welding assembly is realized, effectively improving the operation convenience, and can be achieved without an additional driving source, saving energy and reducing costs at the same time;

[0018] 2. The output shaft and the driving motor are connected by a coupling. On the one hand, it makes the connection part have a certain flexible shock absorption effect, avoiding the situation of direct jamming due to non-concentricity caused by impurity particles. On the other hand, the output shaft can be independently manufactured, and the motor shaft can also be made shorter, reducing the production difficulty and cost;

[0019] 3. The friction moving block is connected to the eccentric wheel through a connecting rod, effectively improving the structural strength of the connection part compared with the direct connection method;

[0020] 4. The transmission between the eccentric wheel and the output shaft adopts a gear transmission method, which can achieve the corresponding speed reduction effect according to the design of the gear size while realizing the transmission function. Description of the Drawings

[0021] Figure 1 is the overall structure diagram of Embodiment 1.

[0022] Figure 2 is the structure diagram of Embodiment 1 after hiding the base.

[0023] Figure 3 is the connection structure diagram of the welding assembly and the connecting rod in Embodiment 1.

[0024] Figure 4 is the structure diagram of the drive ring in Embodiment 1.

[0025] Figure 5 is the sectional view of Embodiment 1 at the output shaft and the planetary gear reduction group.

[0026] Figure 6 is the structure diagram of Embodiment 1 from the perspective of the cutter.

[0027] Figure 7 is the structure diagram of the friction moving block in Embodiment 1.

[0028] Figure 8 is the overall structure diagram of Embodiment 2.

[0029] Description of the Reference Numerals:

[0030] 1. Base; 2. Mounting Plate; 3. Welding Assembly; 4. Driving Motor; 5. Output Shaft; 6. Base; 7. Friction Moving Block; 8. Friction Static Block; 9. Movable Block; 10. Connecting Rod; 11. Elastic Member; 12. Rotating Rod; 13. Contact Member; 14. Drive Ring; 15. Planetary Gear Reduction Group; 16. Protrusion; 17. Mounting Portion; 18. Contact Wheel; 19. Pressing Portion; 20. Limiting Rod; 21. Limiting Groove; 22. Connecting Rod; 23. Eccentric Wheel; 24. Driving Gear; 25. Transmission Gear; 26. Driven Gear; 27. Coupling; 28. One-Way Bearing; 29. Bevel Gear; 30. Cutter; 31. Cutting Tooth; 32. Limiting Sleeve; 33. Limiting Screw; 34. Slide Groove; 35. Mounting Groove; 36. Welding Tooth; 37. Screw Pin; 38. Steel Ball; 39. Movable Groove; 40. Reset Pull Spring; 41. Limiting Portion; 42. Reset Torsion Spring. Detailed Description of the Embodiment

[0031] The following is a further detailed description of the present application in combination with the attached Figure 1-8 drawings.

[0032] A welding mechanism of a strapping machine, as shown in Figure 1 and Figure 2As shown, it includes a base 1, a mounting plate 2 and a welding assembly 3. The mounting plate 2 is vertically arranged and fixed on the base 1. A driving source is provided on the mounting plate 2. The driving source includes a driving motor 4 and an output shaft 5. The output shaft 5 is connected to the output end of the driving motor 4. The welding assembly 3 includes a base 6 and a friction moving block 7. The friction moving block 7 is horizontally slidably connected to the base 6. At the same time, a friction static block 8 is fixedly arranged below the base 1 corresponding to the friction moving block 7. During actual use, the packing belt is placed between the friction moving block 7 and the friction static block 8. After pressing down the friction moving block 7, the friction moving block 7 is driven to move horizontally back and forth to achieve welding and fixing.

[0033] As Figure 2 and Figure 3 shown, a movable block 9 is hinged on the base 6. A connecting rod 10 which is slidably connected to it is inserted into the movable block 9. An elastic member 11 for connecting the two is arranged between the connecting rod 10 and the movable block 9, so as to realize the movable connection between the connecting rod 10 and the movable block 9. When the base 6 is pressed down, it can be applicable to packing belts of different thicknesses. The elastic member 11 adopts a compression spring. A rotating rod 12 is arranged on the mounting plate 2. One end of the rotating rod 12 is rotatably connected to the mounting plate 2, and the other end is hinged to the end of the connecting rod 10 far from the movable block 9. An abutting member 13 is arranged on the rotating rod 12. A driving ring 14 is rotatably connected to the mounting plate 2. A first transmission assembly for connecting the two is arranged between the driving ring 14 and the driving source. In this embodiment, the first transmission assembly adopts a planetary gear reduction set 15 to achieve multi-stage speed reduction. A convex block 16 is arranged on the side wall of the driving ring 14. When the driving ring 14 rotates, the convex block 16 contacts the abutting member 13 to drive the rotating rod 12 to rotate; when the welding assembly 3 is in the lifted state, the height of the hinge point between the connecting rod 10 and the rotating rod 12 is lower than the connection line between the rotation center of the rotating rod 12 and the hinge point of the movable block 9. When the driving ring 14 rotates and the convex block 16 contacts the abutting member 13 to drive the rotating rod 12 to rotate, the height of the hinge point between the connecting rod 10 and the rotating rod 12 is higher than the connection line between the rotation center of the rotating rod 12 and the hinge point of the movable block 9. At this time, under the action of the elastic member 11, the welding assembly 3 will be automatically driven to press down, without manual operation, effectively improving the convenience of operation.

[0034] As Figure 2 and Figure 3As shown, when the driving source stops, when the bump 16 just stops at the contact angle position with the abutting member 13, there will be a situation where the rotating rod 12 and the welding assembly 3 cannot be reset, that is, the welding assembly 3 cannot be lifted well, resulting in jamming; in this embodiment, the abutting member 13 includes an arc rod, and an installation portion 17 for connecting the arc rod extends on one side of the rotating rod 12. One end of the arc rod is rotatably connected to the installation portion 17, and the other end bypasses the rotation center of the rotating rod 12 and extends close to the driving ring 14. An abutting wheel 18 for abutting against the bump 16 is provided at the end of the arc rod away from the installation portion 17. The abutting wheel 18 is rotatably connected to the arc rod, and a pressing portion 19 extends on one side of the arc rod. The pressing portion 19 is located on the side of the arc rod rotation connection point facing away from the abutting wheel 18; by such a setting, when it is necessary to lift and reset the welding assembly 3, when pressing down the pressing portion 19, the rotating rod 12 is driven to partially lift the abutting wheel 18 so that it does not contact the bump 16. At this time, the driving source drives the driving ring 14 to rotate, and the jamming phenomenon can be avoided, effectively ensuring the effective operation and use of the mechanism. In other embodiments, a driving member can be provided to press down the pressing portion 19 to avoid manual operation.

[0035] As Figure 2 and Figure 4 shown, the bump 16 protrudes from the outer wall of the driving ring 14. The bump 16 and the driving ring 14 are integrally provided. The thickness of the bump 16 gradually decreases along the circumference of the driving ring 14. The surface of the bump 16 in contact with the abutting wheel 18 is an arc surface. In this way, when the bump 16 abuts against the abutting wheel 18, it is more smooth and not prone to jamming, and the contact area is reduced, making the smoothness better when the two contact. Moreover, such a design makes the integrity of the bump 16 and the driving ring 14 better, and it is not prone to breakage during long-term contact and impact, with better structural strength and more durability.

[0036] As Figure 2 and Figure 3 shown, a limiting rod 20 extends on one side of the rotating rod 12, and at the same time, a limiting groove 21 for limiting the limiting rod 20 is provided on the abutting member 13. When the rotating rod 12 rotates, the limiting rod 20 moves in the limiting groove 21, which can effectively limit the rotation angle and avoid the phenomenon of excessive rotation.

[0037] As Figure 2 and Figure 3As shown, a connecting rod 22 is hinged to one side of the friction moving block 7. An eccentric wheel 23 is arranged inside the end of the connecting rod 22 away from the friction moving block 7. The eccentric wheel 23 is rotatably connected to the mounting plate 2. A second transmission assembly for transmitting power between the eccentric wheel 23 and the output shaft 5 is arranged between them. The second transmission assembly includes a driving gear 24, a transmission gear 25, and a driven gear 26. The driving gear 24 is mounted on the output shaft 5, the driven gear 26 is mounted on the eccentric wheel 23, and both sides of the transmission gear 25 are meshed with the driving gear 24 and the driven gear 26 respectively. In this way, while achieving power transmission, the purpose of speed reduction can be achieved. One driving source can synchronously achieve the automatic downward pressing of the welding assembly 3 and the horizontal reciprocating movement of the friction moving block 7, simplifying the structure and saving energy, effectively reducing production costs. Moreover, the eccentric wheel 23 and the friction moving block 7 are connected by the connecting rod 22, which has better structural strength compared with direct connection.

[0038] As Figure 5 shown, a coupling 27 for connecting the output end of the driving motor 4 and the output shaft 5 is arranged between them. On the one hand, it makes the connection part have a certain flexible shock absorption effect, avoiding the situation of direct jamming due to non - concentricity caused by impurity particles. On the other hand, the output shaft 5 can be independently manufactured, and the motor shaft can also be made shorter, reducing the production difficulty and cost.

[0039] As Figure 2 and Figure 5 shown, a one - way bearing 28 for connecting the driving gear 24 and the output shaft 5 is arranged between them. At the same time, a bevel gear 29 for transmitting power is arranged at the end of the output shaft 5. A one - way bearing 28 for connecting the bevel gear 29 and the output shaft 5 is also arranged between them. And the directions of the two one - way bearings 28 are opposite. The bevel gear 29 is used to transmit power to the tensioning mechanism of the bundling machine. Through the setting of the one - way bearing 28, power transmission of different parts can be achieved during the forward and reverse rotation of the driving motor 4. For example, during forward rotation, power is transmitted to the driving ring 14 and the friction moving block 7, and during reverse rotation, power is transmitted to the tensioning mechanism, realizing that one driving source can achieve multiple functions, simplifying the overall structure of the bundling machine and effectively reducing the overall cost.

[0040] As Figure 6As shown, some of the base 6 is provided with a cutting knife 30. The bottom of the cutting knife 30 has cutting teeth 31. The cutting knife 30 is vertically slidably connected to the base 6. A limiting sleeve 32 is inserted through the cutting knife 30. A limiting screw 33 is arranged inside the limiting sleeve 32. The cutting knife 30 is connected to the base 6 through the limiting screw 33. The cutting knife 30 has a sliding groove 34 for the vertical sliding of the limiting sleeve 32. A downward pressure spring is arranged at the top of the cutting knife 30. The downward pressure spring drives the cutting knife 30 to move downward to press the packing belt tightly. In this way, when the friction moving block 7 moves horizontally back and forth for welding, it will partially drive the packing belt to move horizontally. During this period, the cutting teeth 31 on the cutting knife 30 can synchronously cut the packing belt. The elastically arranged cutting knife 30 can meet packing belts of different thicknesses and has better applicability. An installation groove 35 for installing and placing the friction static block 8 is arranged on the base 6. The opposite surfaces of the friction static block 8 and the friction moving block 7 both have welding teeth 36. The friction static block 8 is detachably connected to the base 1 through a screw pin 37. The friction static block 8 can be independently disassembled and replaced.

[0041] As Figure 6 and Figure 7 shown, steel balls 38 are arranged between the friction moving block 7 and the base 6. Both sides of the friction moving block 7 have moving grooves 39 for the steel balls 38 to move. The friction moving block 7 abuts against the base 6 by means of the steel balls 38, effectively reducing the frictional resistance, so that the friction moving block 7 can move horizontally back and forth relative to the base 6 more smoothly.

[0042] The working principle of the embodiment of the present application: In the initial state, the welding assembly 3 is in the lifted state. The packing belt is placed between the friction moving block 7 and the friction static block 8. The driving motor 4 is turned on and rotates forward to drive the output shaft 5 to rotate. The driving ring 14 is driven to rotate through the planetary gear reduction group 15. During this period, the eccentric wheel 23 is also driven to rotate by means of the driving gear 24, the transmission gear 25 and the driven gear 26. The rotation of the eccentric wheel 23 drives the friction moving block 7 to move horizontally back and forth. When the driving ring 14 rotates, the convex block 16 contacts and abuts against the abutting wheel 18 to drive the rotating rod 12 to rotate, so that the height of the hinge point of the connecting rod 10 and the rotating rod 12 is higher than the connecting line between the rotation center of the rotating rod 12 and the hinge point of the moving block 9. At this time, under the action of the elastic member 11, the welding assembly 3 will be automatically driven to press down. At this time, the abutting wheel 18 no longer contacts the convex block 16. After welding is completed, the abutting member 13 is driven to rotate by pressing the pressing portion 19. After the abutting wheel 18 is partially lifted, the pressing portion 19 is continuously pressed down to drive the rotating rod 12 to rotate until the height of the hinge point of the connecting rod 10 and the rotating rod 12 is lower than the connecting line between the rotation center of the rotating rod 12 and the hinge point of the moving block 9. At this time, under the action of the elastic member 11, the automatic lifting of the welding assembly 3 is realized, and then the packing belt is taken out to complete the entire welding process.

[0043] Embodiment 2

[0044] A welding mechanism of a strapping machine, as Figure 8As shown, a reset tension spring 40 for connecting the mounting plate 2 and the base 6 is provided therebetween. The reset tension spring 40 drives the base 6 to lift and reset. In this way, when the hinge point of the connecting rod 10 and the rotating rod 12 is lower than the connecting line between the rotation center of the rotating rod 12 and the hinge point of the movable block 9, the base 6 will be automatically lifted under the pulling and resetting action of the reset tension spring 40, facilitating the subsequent insertion of the packing tape.

[0045] As Figure 8 shown, a limiting portion 41 extends on the rotating rod 12. The limiting portion 41 is used to abut against the bottom end of the connecting rod 10. By means of the limiting portion 41 abutting against the bottom of the connecting rod 10, the function of limiting the rotation angle can be achieved. When the limiting portion 41 abuts against the bottom of the connecting rod 10 during the rotation of the rotating rod 12, at this time, the base 6 has completed automatic downward movement and the friction moving block 7 is just in a horizontal state, and a good welding effect can be achieved.

[0046] As Figure 8 shown, a reset torsion spring 42 for driving the rotating connection of the abutting member 13 to rotate and reset is provided at the rotating connection of the abutting member 13. When the pressing portion 19 is released after being pressed down, the reset torsion spring 42 drives the abutting member 13 to rotate and reset, realizing the good automatic reset of the abutting member 13.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. The welding mechanism of a packing machine, characterized in that: It includes a base (1), a mounting plate (2), and a welding assembly (3). The welding assembly (3) is hinged with a movable block (9). A connecting rod (10) is arranged on the movable block (9). A rotating rod (12) is rotatably connected to the mounting plate (2). One end of the rotating rod (12) is hinged to the end of the connecting rod (10) away from the movable block (9). An abutting member (13) is arranged on the rotating rod (12). A driving source is arranged on the mounting plate (2). A driving ring (14) is rotatably connected to the mounting plate (2). A convex block (16) for contacting the abutting member (13) to drive the rotating rod (12) to rotate is arranged on the driving ring (14). A first transmission assembly for transmitting power between the driving ring (14) and the driving source is arranged. After the convex block (16) abuts against the abutting member (13) to push the rotating rod (12) to rotate, the hinge point of the connecting rod (10) and the rotating rod (12) is higher than the connection line between the rotation center of the rotating rod (12) and the hinge point of the movable block (9).

2. The welding mechanism of a packing machine according to claim 1, characterized in that: The welding assembly (3) includes a base (6) and a friction movable block (7). A friction static block (8) is arranged on the base (1) corresponding to the friction movable block (7). A connecting rod (22) is connected to the friction movable block (7). One end of the connecting rod (22) is hinged to the friction movable block (7), and the other end is provided with an eccentric wheel (23) for driving it to reciprocate. A second transmission assembly for transmitting power between the eccentric wheel (23) and the driving source is arranged.

3. The welding mechanism of a strapping machine according to claim 2, characterized in that: The driving source includes a driving motor (4) and an output shaft (5). A coupling (27) for connecting the driving motor (4) and the output shaft (5) is arranged between the driving motor (4) and the output shaft (5).

4. The welding mechanism of a packing machine according to claim 3, characterized in that: The second transmission assembly includes a driving gear (24), a transmission gear (25), and a driven gear (26). The driving gear (24) is installed on the output shaft (5). The driven gear (26) is installed on the eccentric wheel (23). The two sides of the transmission gear (25) are respectively meshed with the driving gear (24) and the driven gear (26).

5. The welding mechanism of a strapping machine according to claim 1, characterized in that: The first transmission assembly includes a planetary gear reduction group (15). The input end of the planetary gear reduction group (15) is connected to the driving source, and the output end of the planetary gear reduction group (15) is connected to the driving ring (14).

6. The welding mechanism of a bundling machine according to claim 1, characterized in that: The abutting member (13) includes an arc rod. A mounting portion (17) extends on the rotating rod (12). One end of the arc rod is rotatably connected to the mounting portion (17), and the other end is installed with an abutting wheel (18) for abutting against the convex block (16).

7. The welding mechanism of a packing machine according to claim 6, characterized in that: A limiting rod (20) extends on the rotating rod (12). A limiting groove (21) for the limiting rod (20) to move is formed on the arc rod.

8. The welding mechanism of a packing machine according to claim 6, characterized in that: A pressing portion (19) extends from the end of the arc rod away from the abutting wheel (18).

9. The welding mechanism of a packing machine according to claim 1, characterized in that: A reset tension spring (40) for connecting the mounting plate (2) and the base (6) is arranged between the mounting plate (2) and the base (6). The reset tension spring (40) drives the base (6) to lift and reset.

10. The welding mechanism of a packing machine according to claim 1, characterized in that: The bump (16) protrudes from the outer wall of the driving ring (14). The bump (16) is integrally provided with the driving ring (14). The thickness of the bump (16) gradually decreases along the circumference of the driving ring (14). The surface of the bump (16) in contact with the abutting member (13) is an arc surface.

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