Machine head of automatic packing machine

Abstract

An automatic packer head belongs to the technical field of packers. Comprising a rack, a belt feeding mechanism and a knife rest assembly are arranged on the surface of the rack, a welding mechanism (13) is arranged on the upper portion of the knife rest assembly, a driving motor is arranged on the side portion of the welding mechanism (13) and connected with a vibrator in the welding mechanism (13) through a transmission mechanism, and the welding mechanism (13) and the driving motor are both connected with the rack in a lifting mode. The automatic welding machine is characterized in that the driving motor is a servo motor (9), the servo motor (9) and the welding mechanism (13) are arranged in a relative sliding mode, the automatic welding machine is further provided with a tensioning mechanism, the tensioning mechanism is fixed relative to the servo motor (9) or the welding mechanism (13), and the relative sliding direction of the servo motor (9) and the welding mechanism (13) is parallel to the tensioning direction of the tensioning mechanism. According to the machine head of the automatic packing machine, the tensioning mechanism is arranged, so that the transmission mechanism connected with the driving motor and the welding mechanism is in a tensioning state, and the transmission efficiency is prevented from being influenced by the transmission mechanism.

Description

Technical Field

[0001] The invention discloses an automatic baling machine head, belonging to the technical field of baling machines. Background Art

[0002] During the transportation and transfer of goods, the most common way is to use strapping tape to pack scattered goods into a whole to prevent the goods from scattering and being damaged. After the goods are packed, the ends of the strapping tape need to be fixed. At present, friction welding strapping machines are a more common method on the market. Traditional friction welding strapping machines use the friction hot melt device inside them to fix the ends of the strapping tape.

[0003] The friction hot melt device includes a motor and a welding mechanism, a vibrator is arranged in the welding mechanism, and a friction block is arranged at the bottom of the vibrator. When welding is required, the friction hot melt device is driven down by the lifting drive mechanism (generally a cylinder), and the welding mechanism moves to the welding position at this time. The motor drives the vibrator to vibrate at high frequency through the eccentric shaft, thereby driving the strapping belt to achieve friction welding (such as the technical solution disclosed in the Chinese utility model patent with application number 201920153788.8, application date January 29, 2019, and patent name "A packing machine welding mechanism and packing machine"). After the welding is completed, the friction hot melt device is driven to rise to the initial position through the lifting drive mechanism.

[0004] In the friction heat melting device including the above-mentioned prior art, although it is generally recorded that the motor can be a pneumatic motor or an electric motor, in commercially available products, pneumatic motors are generally used. The reason is that pneumatic motors are more conducive to achieving the vibration frequency required by the vibrator to achieve welding. However, the disadvantage of using pneumatic motors is that the baler needs to be equipped with an air supply system including a compressor. Therefore, the system is more complicated and the cost is higher. In addition, when the temperature is low in winter, the pressure of the air supply system is unstable, resulting in the friction heat melting device being unable to work normally.

[0005] When the motor is an electric motor, there are still problems: (1) When an electric motor is used in the prior art, a transmission mechanism is generally required (such as the technical solution disclosed in the Chinese utility model patent with application number 201920153788.8, application date January 29, 2019, and patent name "A packing machine welding mechanism and packing machine"). After the welding mechanism works for a long time, the transmission mechanism will become loose, affecting the transmission efficiency. (2) When realizing the lifting and lowering of the friction hot melt device, if a single set of lifting drive mechanism is used to drive the motor and the vibrator to lift and lower at the same time, the reliability is poor due to the large number of components. When multiple sets of lifting drive mechanisms are used to drive the motor and the vibrator to lift and lower respectively, the lifting and lowering synchronization of the motor and the vibrator is difficult to ensure. Therefore, it is an urgent problem to be solved in this field to design a technical solution that can stably and reliably realize the lifting and lowering of the friction hot melt device while using an electric motor as the power source of the vibrator. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an automatic baling machine head which, by setting a tensioning mechanism, puts the transmission mechanism connecting the servo motor and the welding mechanism in a tensioned state, thereby avoiding the transmission efficiency being affected by the transmission mechanism.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the head of the automatic baling machine includes a frame, a belt feeding mechanism is arranged on the surface of the frame, a tool holder assembly is also arranged on the side of the belt feeding mechanism, the tool holder assembly is swingably arranged on the front side of the frame, a welding mechanism is arranged on the upper part of the tool holder assembly, a driving motor is arranged on the side of the welding mechanism, the driving motor is connected to the vibrator in the welding mechanism through a transmission mechanism, the welding mechanism and the driving motor can be connected to the frame in a lifting manner, and it is characterized in that: the driving motor is a servo motor, the servo motor and the welding mechanism are arranged to slide relative to each other, and a tensioning mechanism is also arranged, the tensioning mechanism is relatively fixed to the servo motor or the welding mechanism, and the relative sliding direction of the servo motor and the welding mechanism is parallel to the tensioning direction of the tensioning mechanism.

[0008] Preferably, a first drive assembly and a second drive assembly are provided, the welding mechanism is connected to the frame through the first drive assembly, the servo motor is connected to the frame through the second drive assembly, and a lifting synchronization mechanism is also provided, one part of the lifting synchronization mechanism is connected to the welding mechanism or the first drive assembly, and the other part of the lifting synchronization mechanism is connected to the servo motor or the second drive assembly.

[0009] Preferably, the first drive assembly includes a first lifting cylinder, the welding mechanism is fixed to the piston rod of the first lifting cylinder, and the lifting synchronization mechanism is fixed to the side of the welding mechanism or the piston rod of the first lifting cylinder and extends to the second drive assembly.

[0010] Preferably, the second driving assembly includes a second lifting cylinder and a lifting plate group that slides vertically along the frame, the piston rod of the second lifting cylinder is connected to the lifting plate group; the servo motor is installed on the side of the lifting plate group, and the tensioning mechanism is arranged at the lifting plate group.

[0011] Preferably, the lifting plate group includes a translation plate and a lifting plate, the bottom of the translation plate and the top of the lifting plate are staggered to form an interlaced portion, the transmission mechanism is a synchronous belt mechanism, and a tensioning mechanism for achieving tensioning of the synchronous belt in the synchronous belt mechanism is arranged at the interlaced portion of the translation plate and the lifting plate.

[0012] Preferably, the tensioning mechanism includes a plurality of elongated adjustment grooves formed on the surface of the translation plate, and threaded holes corresponding to the adjustment grooves are formed on the lifting plate, and the fastening bolts pass through the adjustment grooves and are screwed into the corresponding threaded holes; a tensioning fixing block is also provided on the side of the lifting plate, and the adjusting bolts pass through the tensioning fixing block and are threadedly connected to the translation plate.

[0013] Preferably, the lifting synchronization mechanism is a synchronization rod horizontally fixed on the side of the welding mechanism, and a translation rod is protrudingly provided at the end of the synchronization rod, and the translation rod extends to the second driving assembly.

[0014] Preferably, the tool holder assembly includes a swing arm, which passes through the frame and extends to the back side of the frame, and a swing cylinder hinged to the swing arm is arranged on the back side of the frame; the swing arm is fixed with a tool holder connecting plate through a fixed block on the front side of the frame, and a tool holder is horizontally fixed at the bottom of the tool holder connecting plate, and the tool holder is located below the welding mechanism.

[0015] Preferably, the servo motor is a servo motor with a braking function, and the transmission mechanism is a speed increasing mechanism.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the head of the automatic baling machine, a tensioning mechanism is provided so that the transmission mechanism connecting the servo motor and the welding mechanism is in a tensioned state, thereby avoiding the transmission efficiency being affected by the transmission mechanism.

[0017] In the head of the automatic baling machine, the first drive assembly and the second drive assembly respectively drive the welding mechanism and the servo motor to rise and fall, and the first drive assembly and the second drive assembly are connected by a lifting synchronization mechanism, thereby realizing the synchronous lifting and falling of the welding mechanism and the servo motor, making the friction hot melt device more stable and reliable.

[0018] In the head of the automatic baling machine, a tensioning mechanism is provided to keep the synchronous belt in the synchronous belt mechanism in a tensioned state, thereby improving transmission efficiency and reliability.

[0019] The adjustment slot in the tensioning mechanism is in the shape of a long strip, which provides an adjustment margin during adjustment.

[0020] In the head of this automatic baling machine, the servo motor is a servo motor with a braking function, and the transmission mechanism is a speed-increasing mechanism that can enable the vibrator to reach the peak value of its vibration frequency in the shortest time and start welding. After welding, the servo motor's own braking function can achieve instantaneous shutdown, shortening the welding time and ensuring the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the axonometric view of the automatic baling machine head.

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0023] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0024] Among them: 1, main frame 2, first lifting cylinder 3, side frame 4, synchronization rod 5, cylinder bracket 6, second lifting cylinder 7, fixed frame 8, translation plate 9, servo motor 10, lifting plate 11, guide rail 12, bushing 13, welding mechanism 14, fixed block 15, tool holder connecting plate 16, swing arm 17, tape feeding station 18, tool holder 19, translation rod 20, translation groove 21, synchronization belt 22, driving pulley 23, driven pulley 24, fastening bolt 25, spring 26, tensioning fixing block 27, adjusting bolt 28, adjusting groove. DETAILED DESCRIPTION

[0025] Figures 1 to 3 The best embodiment of the present invention is shown below in conjunction with the attached Figures 1 to 3 The present invention is further described.

[0026] like Figure 1 As shown, an automatic baling machine head includes a frame, the frame includes a main frame 1 and a side frame 3 fixed to the side of the main frame 1, a belt feeding station 17 is arranged on one side of the surface of the main frame 1, and a belt feeding mechanism (not shown in the figure) is arranged at the belt feeding station 17. The belt feeding mechanism is implemented by a well-known structure in the art, such as the technical solution disclosed in the Chinese utility model patent with application number 202322975199.7, application date November 3, 2023, and patent name "A belt feeding mechanism for a brick baling machine head and a brick baling machine head". Its working principle will not be repeated here.

[0027] A tool holder assembly is also provided on the surface of the main frame 1. The tool holder assembly is located on one side of the tape feeding station 17. The tool holder assembly includes two swing arms 16 arranged side by side. The two swing arms 16 extend through the main frame 1 to the back side of the main frame 1. Two swing cylinders are provided on the back side of the main frame 1. The piston rods of the two swing cylinders are vertically downward and are respectively hinged to the corresponding swing arms 16. The two swing arms 16 are respectively fixed to a fixed block 14 on the front side of the main frame 1. A tool holder connecting plate 15 is respectively fixed on the outer side of the two fixed blocks 14. A tool holder 18 is horizontally fixed to the bottom of the tool holder connecting plates 15 on both sides. When the swing cylinder on the back side of the main frame 1 is actuated, the tool holder 18 is driven to swing on the front side of the main frame 1 through the swing arm 16, the fixed block 14 and the tool holder connecting plate 15. The specific structure of the tool holder assembly is also implemented using a well-known structure in the field, such as the technical solution disclosed in the Chinese utility model patent with application number 202320589308.9, application date March 23, 2023, and patent name "A welding baler movement".

[0028] A welding mechanism 13 is arranged above the tool holder assembly, and a first lifting cylinder 2 is arranged on the upper part of the welding mechanism 13. The piston rod of the first lifting cylinder 2 is vertically downward, and the piston rod of the first lifting cylinder 2 is connected to the first lifting cylinder 2. The welding mechanism 13 is driven to rise and fall through the first lifting cylinder 2.

[0029] The main body of the first lifting cylinder 2 is fixed on the top plate of the main frame 1, a cylinder bracket 5 is arranged on the upper part of the outer side surface of the side frame 3, a second lifting cylinder 6 is fixed on the lower surface of the cylinder bracket 5, the piston rod of the second lifting cylinder 6 is vertically downward, and a fixing frame 7 is installed at the end of the piston rod of the second lifting cylinder 6. A translation plate 8 is fixed at the bottom of the fixing frame 7, and a lifting plate 10 is arranged at the bottom of the translation plate 8.

[0030] A guide rail 11 is provided at the lower part of the outer side of the side frame 3, and the lifting plate 10 is slidably connected to the side frame 3 in the vertical direction through the guide rail 11. A servo motor 9 is installed on the side of the translation plate 8, and the motor shaft of the servo motor 9 passes through the translation plate 8 and faces the welding mechanism 13.

[0031] A sleeve 12 is provided on the side of the welding mechanism 13, an eccentric shaft is provided in the sleeve 12, the output end of the eccentric shaft passes through the outer shell of the welding mechanism 13 and is connected to the vibrator in the welding mechanism 13, and the input end of the eccentric shaft is led out from the end of the sleeve 12. The motor shaft of the servo motor 9 is connected to the eccentric shaft through a synchronous belt mechanism after passing through the translation plate 8.

[0032] Combination Figure 2The bottom of the translation plate 8 and the top of the lifting plate 10 are arranged in an inner and outer staggered manner, so that the translation plate 8 and the lifting plate 10 can slide forward and backward in the horizontal direction. A plurality of adjustment grooves 28 are provided on the surface of the translation plate 8, and the adjustment grooves 28 are long and transparent grooves that penetrate the translation plate 8. The surface of the lifting plate 10 is provided with threaded holes corresponding to the adjustment grooves 28, and the adjustment grooves 28 and the corresponding threaded holes are both provided in the staggered area of ​​the translation plate 8 and the lifting plate 10.

[0033] A tensioning block 26 is provided at the end of the intersecting area of ​​the translation plate 8 and the lifting plate 10. The tensioning block 26 is fixed to the lifting plate 10 and is arranged opposite to the translation plate 8. An adjusting bolt 27 is provided at the rear of the tensioning block 26. The adjusting bolt 27 passes through the tensioning block 26 and is screwed into the translation plate 8. The adjusting bolt 27 is threadedly connected to the translation plate 8. A spring 25 is sleeved on the outside of the adjusting bolt 27. The spring 25 is located between the translation plate 8 and the tensioning block 26. The front and rear positions of the translation plate 8 and the lifting plate 10 can be adjusted by rotating the adjusting bolt 27. During the adjustment process, the long strip-shaped adjusting slot 28 provides a movement margin for the translation plate 8, and after adjusting to a suitable position, the translation plate 8 and the lifting plate 10 are locked by tightening the bolt 24.

[0034] Combination Figure 3 The synchronous belt mechanism includes a driving pulley 22 installed on the motor shaft of the servo motor 9 and a driven pulley 23 installed on the end of the eccentric shaft. The driving pulley 22 and the driven pulley 23 are connected by a synchronous belt 21. A synchronous rod 4 is also horizontally fixed to the side of the outer shell of the welding mechanism 13, and the end of the synchronous rod 4 extends horizontally to the side of the translation plate 8. A horizontal protrusion is provided on the side of the translation plate 8, and a translation groove 20 is opened in the horizontal protrusion. A translation rod 19 is also horizontally provided at the end of the synchronization rod 4, and the translation rod 19 enters the translation groove 20. Since the translation groove 20 is horizontally arranged, it can provide an adjustment margin when the front and rear positions of the translation plate 8 and the lifting plate 10 are adjusted.

[0035] In the head of the automatic baler, the servo motor 9 is implemented by a servo motor with a braking function, and the synchronous belt mechanism adopts a speed increasing mechanism, wherein the gear ratio of the driving pulley 22 to the driven pulley 23 is 68:14. In this field, in order to achieve the welding of the strapping tape, the vibration frequency of the vibrator in the welding mechanism 13 is above 10,000 times / minute. In the head of the automatic baler, when the rotation speed of the servo motor 9 is about 3,000 revolutions / minute, the welding requirements of the vibrator can be met. And it can be seen from the experiment that when the welding of the strapping tape is achieved, the shorter the welding time, the better the welding effect. Therefore, through the servo motor 9 and the synchronous belt mechanism set by the above parameters, the vibrator can reach the peak value of its vibration frequency in the shortest time and start welding. After welding, the braking function of the servo motor 9 itself can achieve instantaneous shutdown, shortening the welding time and ensuring the welding effect.

[0036] Traditional servo motors, whether electric or pneumatic, are not high-speed motors. It takes a certain amount of time for the vibration frequency of the vibrator to rise (start welding) and fall (complete welding), especially the process of the vibrator stopping swinging. Therefore, the welding time is increased, making it difficult to achieve the welding effect of the automatic baling machine head.

[0037] The specific working process and working principle are as follows: When welding is required, the tool holder 18 swings to the lower part of the welding mechanism 13 under the action of the swing cylinder, and the piston rods of the first lifting cylinder 2 and the second lifting cylinder 6 are output at the same time, driving the welding mechanism 13 and the servo motor 9 to descend, so that the welding mechanism 13 descends to the welding station. The servo motor 9 works, and at this time, the vibrator in the welding mechanism 13 is driven to vibrate at high speed through the synchronous belt mechanism to achieve the welding of the packaging tape. Similar to the prior art, a cutter is provided at the bottom of the welding mechanism 13, and the packaging tape is cut off when the welding mechanism 13 descends. After the welding is completed, the piston rods of the first lifting cylinder 2 and the second lifting cylinder 6 are reset at the same time, driving the welding mechanism 13 and the servo motor 9 to rise to the dehumidification station. During the lifting process of the servo motor 9, under the guidance of the guide rail 11, the translation plate 8 and the lifting plate 10 are synchronously lifted and lowered along the side frame 3.

[0038] During the above working process of the first lifting cylinder 2 and the second lifting cylinder 6, since a synchronization rod 4 is provided on the side of the welding mechanism 13 and the end of the synchronization rod 4 is inserted into the translation groove 20 of the translation plate 8, the synchronization rod 4 is used to realize the synchronous lifting of the welding mechanism 13 and the servo motor 9.

[0039] After working for a period of time, if the synchronous belt 21 becomes loose, first rotate the fastening bolt 24 to release the locking state of the translation plate 8 and the lifting plate 10 after stopping, then rotate the adjusting bolt 27 to make the translation plate 8 and the lifting plate 10 translate, so as to tighten the synchronous belt 21, and after adjusting to the appropriate position, lock the translation plate 8 and the lifting plate 10 again by rotating the fastening bolt 24.

[0040] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. An automatic baling machine head, comprising a frame, a belt feeding mechanism is arranged on the surface of the frame, a knife frame assembly is also arranged on the side of the belt feeding mechanism, the knife frame assembly is swingably arranged on the front side of the frame, a welding mechanism (13) is arranged on the upper part of the knife frame assembly, a driving motor is arranged on the side of the welding mechanism (13), the driving motor is connected to a vibrator in the welding mechanism (13) through a transmission mechanism, and the welding mechanism (13) and the driving motor are both connected to the frame in a lifting manner. Features: The driving motor is a servo motor (9), the servo motor (9) and the welding mechanism (13) are arranged to slide relative to each other, and a tensioning mechanism is also provided, the tensioning mechanism is fixed relative to the servo motor (9) or the welding mechanism (13), and the relative sliding direction of the servo motor (9) and the welding mechanism (13) is parallel to the tensioning direction of the tensioning mechanism.

2. The automatic baling machine head according to claim 1, Features: A first drive assembly and a second drive assembly are provided, the welding mechanism (13) is connected to the frame via the first drive assembly, the servo motor (9) is connected to the frame via the second drive assembly, and a lifting synchronization mechanism is also provided, one part of the lifting synchronization mechanism is connected to the welding mechanism (13) or the first drive assembly, and the other part of the lifting synchronization mechanism is connected to the servo motor (9) or the second drive assembly.

3. The automatic baling machine head according to claim 2, Features: The first drive assembly comprises a first lifting cylinder (2), a welding mechanism (13) is fixed to the piston rod of the first lifting cylinder (2), and a lifting synchronization mechanism is fixed to the side of the welding mechanism (13) or the piston rod of the first lifting cylinder (2), and extends to the second drive assembly.

4. The automatic baling machine head according to claim 2 or 3, Features: The second driving assembly comprises a second lifting cylinder (6) and a lifting plate group that slides vertically along the frame, the piston rod of the second lifting cylinder (6) being connected to the lifting plate group; the servo motor (9) being mounted on the side of the lifting plate group, and the tensioning mechanism being arranged at the lifting plate group.

5. The automatic baling machine head according to claim 4, Features: The lifting plate group comprises a translation plate (8) and a lifting plate (10), the bottom of the translation plate (8) and the top of the lifting plate (10) are staggered to form an interlaced portion, the transmission mechanism is a synchronous belt mechanism, and a tensioning mechanism for achieving tensioning of a synchronous belt (21) in the synchronous belt mechanism is arranged at the interlaced portion of the translation plate (8) and the lifting plate (10).

6. The automatic baling machine head according to claim 5, Features: The tensioning mechanism comprises a plurality of long strip-shaped adjustment grooves (28) formed on the surface of the translation plate (8); threaded holes corresponding to the adjustment grooves (28) are formed on the lifting plate (10); and the fastening bolts (24) pass through the adjustment grooves (28) and are screwed into the corresponding threaded holes; a tensioning fixing block (26) is also provided on the side of the lifting plate (10); and the adjustment bolts (27) pass through the tensioning fixing block (26) and are threadedly connected to the translation plate (8).

7. The automatic baling machine head according to claim 2 or 3, Features: The lifting synchronization mechanism is a synchronization rod (4) horizontally fixed on the side of the welding mechanism (13), and a translation rod (19) is protrudingly provided at the end of the synchronization rod (4), and the translation rod (19) extends to the second drive assembly.

8. The automatic baling machine head according to claim 1, Features: The tool holder assembly comprises a swing arm (16), the swing arm (16) passes through the frame and extends to the back side of the frame, and a swing cylinder hinged to the swing arm (16) is arranged on the back side of the frame; the swing arm (16) is fixed with a tool holder connecting plate (15) through a fixing block (14) on the front side of the frame, and a tool holder (18) is horizontally fixed at the bottom of the tool holder connecting plate (15), and the tool holder (18) is located below the welding mechanism (13).

9. The automatic baling machine head according to claim 1, Features: The servo motor (9) is a servo motor with a braking function, and the transmission mechanism is a speed increasing mechanism.

Images