Tensioning mechanism of packing machine

Abstract

The tensioning mechanism comprises a base, a movable frame and a driving source, the movable frame is rotationally connected with a tensioning wheel, one end of the movable frame is rotationally connected to the base, the tensioning wheel is provided with a driven bevel gear, the movable frame is rotationally connected with a driving bevel gear, and the driving bevel gear is provided with a driven bevel gear. A transmission assembly for transmitting the driving bevel gear and the driving source is arranged between the driving bevel gear and the driving source, the movable frame is provided with a mounting part, the mounting part is rotationally connected with a transmission part, and the two ends of the transmission part are provided with transmission bevel gears meshed with the driving bevel gear and the driven bevel gear correspondingly; the transmission bevel gears at the two ends of the transmission part are connected with the driving bevel gear and the driven bevel gear in a transmission mode respectively, the transmission bevel gears are kept in a meshed state all the time in the process that the movable frame is lifted up or put down, the separation phenomenon does not exist, transmission smoothness and durability are effectively guaranteed, and the situation of clamping stagnation or transmission tooth damage does not exist.

Description

Technical Field

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

[0002] An electric strapping machine is a strapping machine that uses electric tightening, friction buckling, and automatic cutting to tie the strap. After wrapping the plastic-steel or plastic strapping tape around the object from top to bottom, the joint is placed into the machine's working slot. The motor drives the tensioning wheel to tighten the strap, and the friction block is driven back and forth to form a friction buckle, bonding the straps. Finally, the strap is automatically cut.

[0003] In actual use, after the strapping tape is placed, it is necessary to first tighten the strapping tape through the tensioning mechanism and then weld it. The tensioning mechanism mainly includes a tensioning wheel, which drives the strapping tape to move and achieve tension by rotating the tensioning wheel. The tensioning wheel is usually rotatably connected to a movable frame that can be lifted up and down, and the tensioning is achieved through transmission gears and a driving source. At present, some transmission gears use straight teeth. When the movable frame is lifted to achieve the lifting of the tensioning wheel, the transmission gears will separate from each other. When the movement is carried out and the pressure is applied again, the teeth of the transmission gears will occasionally collide with each other, resulting in jamming and even damage to the transmission gears. Utility Model Content

[0004] In order to further improve the smoothness and durability of the transmission structure, the present application provides a tensioning mechanism of a baling machine.

[0005] This application provides a tightening mechanism for a baler, which adopts the following technical solution:

[0006] A tensioning mechanism of a baler includes a base, a movable frame and a driving source, wherein the movable frame is rotatably connected to a tensioning wheel, one end of the movable frame is rotatably connected to the base, the tensioning wheel is provided with a driven bevel gear, the movable frame is rotatably connected to a driving bevel gear, a transmission assembly for transmitting the two is provided between the driving bevel gear and the driving source, the movable frame has a mounting portion, the mounting portion is rotatably connected to a transmission member, and both ends of the transmission member have transmission bevel gears respectively meshing with the driving bevel gear and the driven bevel gear.

[0007] Optionally, a mounting plate for installing a transmission assembly is provided on the base, and the transmission assembly includes a first planetary gear reduction group and a spur gear group, and the spur gear group includes a driving gear and a driven gear, the driving gear is connected to the output end of the first planetary gear reduction group, and the driven gear is installed on the core shaft of the driving bevel gear, the driving gear is connected to the driven gear, and the input end of the first planetary gear reduction group is connected to the driving source for transmission.

[0008] Optionally, a ratchet wheel that is rotatably connected to the active bevel gear is provided on the mounting plate, and a pawl for one-way engagement of the ratchet wheel is provided on the mounting plate.

[0009] Optionally, a connecting rod is provided on the mounting plate, the connecting rod is rotatably connected to the mounting plate, and the pawl is provided at one end of the connecting rod.

[0010] 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 passed through the handle, and a movable slot is provided on the movable frame for the connecting pin to pass through and for it to move up and down, one end of the connecting pin is located below the connecting rod and is used to lift the pawl to disengage the ratchet, and a spring piece is fixed on the movable frame, one side of the spring piece is used to press the top wall of one end of the connecting rod where the pawl is provided, and the spring piece is used to drive the connecting rod to rotate and reset until the pawl and the ratchet are in a locked state.

[0011] Optionally, the driving source includes a driving motor and an output shaft, and a coupling is provided between the driving motor and the output shaft to connect the two.

[0012] Optionally, a first bevel gear is provided at the end of the output shaft, a second bevel gear meshing with the first bevel gear is provided at the input end of the first planetary gear reduction set, and a one-way bearing connecting the first bevel gear and the output shaft is provided between the two.

[0013] Optionally, a mounting groove for mounting a pawl is provided on the connecting rod, the pawl is rotatably connected in the mounting groove by a screw, the mounting groove has space for the pawl to rotate, and an elastic column for pressing the pawl is elastically provided on the side wall of the mounting groove.

[0014] Optionally, a reset spring is provided between the movable frame and the base to connect the two, and the reset spring is used to drive the movable frame to be pressed down and reset.

[0015] Optionally, one side of the movable frame is provided with a baffle for shielding the tension wheel, and a blocking portion for blocking the strapping tape extends from the bottom of the baffle.

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

[0017] 1. By setting a mounting portion on the movable frame for the transmission part to be installed, the transmission bevel gears at both ends of the transmission part are connected to the driving bevel gear and the driven bevel gear respectively for transmission. When the movable frame is raised or lowered, the transmission bevel gears always remain in meshing state without separation, effectively ensuring the smoothness and durability of the transmission without jamming or damage to the transmission teeth.

[0018] 2. With the help of the cooperation between the pawl and the ratchet wheel, one-way transmission is achieved, so that the tension wheel will not slip in the opposite direction when pulling the strap, and the tightening effect is better and more stable;

[0019] 3. When the handle is lifted, part of it is movably connected to the movable frame. When the handle is lifted, the pawl is first lifted up and disengaged from the ratchet with the help of the connecting pin. At this time, the tension wheel is not restricted in one direction and will be loosened in the opposite direction under the inertia of the strapping tape. Then, the handle is further lifted to drive the entire movable frame and the tension wheel to lift up, avoiding the situation where the spikes on the tension wheel pierce the strapping tape and make it difficult to lift.

[0020] 4. The output shaft and the drive motor are connected by a coupling. On the one hand, the connection has a certain degree of flexibility and shock absorption, avoiding the situation where the non-concentricity is caused by impurities and particles and the output shaft can be manufactured independently, and the motor shaft can also be made shorter, reducing the difficulty and cost of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall structural diagram of an embodiment of the present application.

[0022] Figure 2 This is a structural diagram of an embodiment of the present application after the mounting plate is hidden.

[0023] Figure 3 This is a structural diagram of the embodiment of the present application after the base and the mounting plate are hidden.

[0024] Figure 4 It is a transmission structure diagram of the tensioning wheel and the active bevel gear in the embodiment of the present application.

[0025] Figure 5 This is a structural diagram of the ratchet and pawl in an embodiment of the present application.

[0026] Figure 6 This is a structural diagram of the connection after the handle explodes in an embodiment of the present application.

[0027] Figure 7 It is a cross-sectional view of the output shaft connection of an embodiment of the present application.

[0028] Description of reference numerals:

[0029] 1. Base; 2. Mounting plate; 3. Movable frame; 4. Driving source; 5. Tensioning wheel; 6. Driven bevel gear; 7. Driving bevel gear; 8. Mounting part; 9. Transmission member; 10. Transmission bevel gear; 11. First planetary gear reduction group; 12. Driving gear; 13. Transmission gear; 14. Driven gear; 15. Ratchet; 16. Reduction gear; 17. Ratchet; 18. Connecting rod; 19. Operating end; 20. Mounting slot; 21. Handle; 22. Rotating shaft; 23. Connecting pin; 24. Movable slot; 25. Driving motor; 26. Output shaft; 27. Coupling; 28. First bevel gear; 29. ​​Second bevel gear; 30. One-way bearing; 31. Second planetary gear reduction group; 32. Lower tensioning plate; 33. Return spring; 34. Elastic column; 35. Shrapnel; 36. Baffle; 37. Blocking part. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-7 This application is described in further detail.

[0031] A tensioning mechanism of a baler, such as Figure 1-Figure 3 As shown, it includes a base 1, a mounting plate 2, a movable frame 3 and a driving source 4. The mounting plate 2 is vertically arranged and fixed on the base 1. One end of the movable frame 3 is rotatably connected to the base 1 so as to be lifted up and down. A tension wheel 5 is rotatably connected to the movable frame 3. A lower tensioning plate 32 is provided below the base 1 corresponding to the tensioning wheel 5. The lower tensioning plate 32 is fixed to the base 1 by screws. When in use, the strapping tape is placed between the lower tensioning plate 32 and the tensioning wheel 5. The surface of the tensioning wheel 5 is evenly distributed with spikes for piercing into the strapping tape to avoid slipping between the tensioning wheel 5 and the strapping tape. The driving source 4 is fixedly mounted on the base 1 and is on the tensioning wheel 5. A driven bevel gear 6 is provided, and a driving bevel gear 7 is rotatably connected on the movable frame 3. A transmission assembly for transmitting the two is provided between the driving bevel gear 7 and the driving source 4. A mounting portion 8 is convexly provided on the mounting portion 8, and a transmission member 9 is rotatably connected on the mounting portion 8. Transmission bevel gears 10 are provided at both ends of the transmission member 9. The transmission bevel gears 10 at both ends are respectively engaged with the driving bevel gear 7 and the driven bevel gear 6 to realize power transmission, so that the output power of the driving source 4 is transmitted to the driving bevel gear 7 through the transmission assembly, and then transmitted to the tensioning wheel 5 on the driven bevel gear 6 through the transmission member 9, and the strapping belt is tightened by means of the rotation of the tensioning wheel 5.

[0032] Through the design of such a transmission structure, the transmission bevel gear 10 always maintains an engaged state with the active bevel gear 7 and the driven bevel gear 6 during the process of lifting or lowering the movable frame 3, and there will be no separation phenomenon, which effectively ensures the smoothness and durability of the transmission and there will be no jamming or damage to the transmission teeth.

[0033] like Figure 2As shown, a reset spring 33 connecting the movable frame 3 and the base 1 is provided between the movable frame 3 and the base 1. The two ends of the reset spring 33 are respectively fixed to the movable frame 3 and the base 1 by fasteners. The reset spring 33 is used to drive the movable frame 3 to press down and reset, keeping the tension wheel 5 pressed tightly on the strapping belt.

[0034] like Figure 1 and Figure 3 As shown, the transmission assembly is mounted on the mounting plate 2, and the transmission assembly includes a first planetary gear reduction group 11 and a spur gear group. The input end of the first planetary gear reduction group 11 is connected to the drive source 4 for transmission, and the spur gear group includes a driving gear 12, a transmission gear 13 and a driven gear 14. The driving gear 12 is connected to the output end of the first planetary gear reduction group 11, and the two sides of the transmission gear 13 are respectively engaged with the driving gear 12 and the driven gear 14. The driven gear 14 is mounted on the core shaft of the driving bevel gear 7 to realize power transmission, and in the transmission process, it passes through the multi-stage deceleration of the first planetary gear reduction group 11 and the spur gear group to achieve better speed reduction purpose.

[0035] like Figure 1 and Figure 4 and Figure 5 As shown, a ratchet 15 that is rotatably connected to the mounting plate 2 and is driven by the active bevel gear 7 is provided on the core shaft of the ratchet 15 with a reduction gear 16 that meshes with the driven gear 14. At the same time, a pawl 17 for one-way clamping of the ratchet 15 is also installed on the mounting plate 2. With the cooperation of the pawl 17 and the ratchet 15, one-way transmission is achieved, so that the tensioning wheel 5 will not slip in the reverse direction during the process of pulling the strap, and the tightening effect is better and more stable.

[0036] like Figure 1 and Figure 4 and Figure 5 As shown, a connecting rod 18 is provided on the mounting plate 2, and the middle part of the connecting rod 18 is rotatably connected to the mounting plate 2, the pawl 17 is installed at one end of the connecting rod 18, and the other end of the connecting rod 18 forms an operating end 19. A mounting groove 20 is provided at the end of the connecting rod 18, and the pawl 17 is rotatably installed in the mounting groove 20 by a screw. There is a movable space in the mounting groove 20 for partial rotation of the pawl 17, and an elastic column 34 for pressing the pawl 17 is elastically provided on the side wall of the mounting groove 20. The elastic column 34 always presses the pawl 17 with the help of the elastic force of the spring, so that when the ratchet 15 rotates forward, the pawl 17 can partially rotate to ensure that the ratchet 15 can rotate normally. The pawl 17 can be lifted up and disengaged from the ratchet 15 through the operating end 19, thereby releasing the engaged state.

[0037] like Figure 4-Figure 6The cam 23 is connected to the movable frame 3 by a rotating shaft 22, and a connecting pin 23 is provided on the handle 21. The connecting pin 23 passes through the handle 21 and the movable frame 3, and a movable groove 24 is provided on the movable frame 3 for the connecting pin 23 to pass through. The connecting pin 23 can move up and down appropriately in the movable groove 24. One end of the connecting pin 23 is located below the end of the connecting rod 18 where the pawl 17 is provided.

[0038] like Figure 4-Figure 6 As shown, a spring piece 35 is fixedly provided on the movable frame 3, and one side of the spring piece 35 extends to the top of one end of the connecting rod 18 where the pawl 17 is provided. The spring piece 35 is used to drive the connecting rod 18 to rotate and reset until the pawl 17 and the ratchet 15 are in a locked state, that is, after the handle 21 is released, the pawl 17 can be driven to reset to the locked state with the ratchet 15 under the action of the spring piece 35.

[0039] like Figure 3 and Figure 7 As shown, the driving source 4 includes a driving motor 25 and an output shaft 26. A coupling 27 connecting the output end of the driving motor 25 and the output shaft 26 is provided. On the one hand, the connection has a certain flexibility and shock absorption effect to avoid the situation where the non-concentricity is directly stuck due to foreign particles. On the other hand, the output shaft 26 can be manufactured independently, and the motor shaft can also be made shorter, reducing the production difficulty and cost. A first bevel gear 28 is provided at the end of the output shaft 26, and a second bevel gear 29 meshing with the first bevel gear 28 is provided at the input end of the first planetary gear reduction set 11. The first bevel gear 28 and the second The bevel gears 29 are engaged to realize the transmission of power. In addition, a one-way bearing 30 connecting the first bevel gear 28 and the output shaft 26 is provided at the connection between the two, so that the output shaft 26 can only drive the first bevel gear 28 to rotate synchronously when it rotates in one direction. In actual use, a transmission group that transmits to the welding mechanism can also be provided on the output shaft 26. A one-way bearing 30 is also provided between the transmission group and the output shaft 26, and the transmission directions of the two one-way bearings 30 are opposite, so that the forward and reverse rotation of the drive source 4 can be realized to control the switching working state of the welding mechanism and the tensioning wheel 5, effectively simplifying the overall structure and reducing the overall cost.

[0040] like Figure 6As shown, a second planetary gear reduction group 31 is provided on the tension wheel 5, the output end of the second planetary gear reduction group 31 is connected to the tension wheel 5, and the input end of the second planetary gear reduction group 31 is connected to the driven bevel gear 6, so that the speed can be further reduced, effectively improving the final speed reduction ratio.

[0041] like Figure 6 As shown, a baffle 36 is provided on one side of the movable frame 3 to shield the tensioning wheel 5, and a blocking portion 37 is extended from the bottom of the baffle 36 to block the strapping tape. With the help of the setting of the baffle 36, the strapping tape can be laterally blocked during the tensioning process to avoid lateral deviation of the strapping tape during the tensioning process.

[0042] The working principle of the embodiment of the present application is as follows: the movable frame 3 is lifted by the handle 21, and the tensioning wheel 5 is lifted up at this time, and then the strapping belt is placed between the tensioning wheel 5 and the base 1, and then the movable frame 3 is pressed down so that the tensioning wheel 5 is pressed on the strapping belt, and the driving source 4 starts to output power, and the output power is transmitted to the tensioning wheel 5 to drive the strapping belt to move and achieve tensioning. After tensioning is completed, the handle 21 is lifted up by hand, and the handle 21 is first lifted up relative to the movable frame 3. During this period, the end of the connecting pin 23 drives the pawl 17 to disengage from the engagement with the ratchet 15. The strapping belt slides relative to the tensioning wheel 5 in the opposite direction under the action of its own inertia to achieve loosening. Continuing to lift the handle 21 can drive the movable frame 3 to complete the lifting together, and finally the lifting of the tensioning wheel 5 is achieved, and the strapping belt is taken out to complete the entire tensioning process.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A tensioning mechanism for a baler, characterized by: The invention comprises a base (1), a movable frame (3) and a driving source (4); a tension wheel (5) is rotatably connected to the movable frame (3); one end of the movable frame (3) is rotatably connected to the base (1); a driven bevel gear (6) is provided on the tension wheel (5); a driving bevel gear (7) is rotatably connected to the movable frame (3); a transmission assembly for transmitting the driving bevel gear (7) and the driving source (4) is provided between the driving bevel gear (7); a mounting portion (8) is rotatably connected to a transmission member (9); and two ends of the transmission member (9) have transmission bevel gears (10) respectively meshing with the driving bevel gear (7) and the driven bevel gear (6).

2. The tensioning mechanism of a baler according to claim 1, characterized in that: The base (1) is provided with a mounting plate (2) for mounting a transmission assembly. The transmission assembly comprises a first planetary gear reduction group (11) and a spur gear group. The spur gear group comprises a driving gear (12) and a driven gear (14). The driving gear (12) is connected to the output end of the first planetary gear reduction group (11). The driven gear (14) is mounted on the core shaft of the driving bevel gear (7). The driving gear (12) and the driven gear (14) are transmission-connected. The input end of the first planetary gear reduction group (11) is transmission-connected to a driving source (4).

3. The tensioning mechanism of a baler according to claim 2, characterized in that: A ratchet (15) that is rotatably connected to the mounting plate (2) and is driven by the active bevel gear (7) is provided on the mounting plate (2). A pawl (17) for one-way clamping of the ratchet (15) is provided on the mounting plate (2).

4. The tensioning mechanism of a baler according to claim 3, characterized in that: A connecting rod (18) is provided on the mounting plate (2), the connecting rod (18) is rotatably connected to the mounting plate (2), and the pawl (17) is provided at one end of the connecting rod (18).

5. The tensioning mechanism of a baler according to claim 4, characterized in that: The movable frame (3) is provided with a handle (21), one end of the handle (21) is rotatably connected to the movable frame (3), a connecting pin (23) is passed through the handle (21), and a movable slot (24) is provided on the movable frame (3) for the connecting pin (23) to pass through and for the movable frame (3) to move up and down. One end of the connecting pin (23) is located below the connecting rod (18) and is used to lift the pawl (17) and disengage the ratchet (15). A spring piece (35) is fixedly provided on the movable frame (3), one side of the spring piece (35) is used to press the top wall of one end of the connecting rod (18) provided with the pawl (17), and the spring piece (35) is used to drive the connecting rod (18) to rotate and reset until the pawl (17) and the ratchet (15) are in a clamping state.

6. The tensioning mechanism of a baler according to claim 2, characterized in that: The driving source (4) includes a driving motor (25) and an output shaft (26), and a coupling (27) is provided between the driving motor (25) and the output shaft (26) to connect the two.

7. The tensioning mechanism of a baler according to claim 6, characterized in that: A first bevel gear (28) is provided at the end of the output shaft (26), a second bevel gear (29) meshing with the first bevel gear (28) is provided at the input end of the first planetary gear reduction set (11), and a one-way bearing (30) connecting the first bevel gear (28) and the output shaft (26) is provided between the first bevel gear (28) and the output shaft (26).

8. The tensioning mechanism of a baler according to claim 4, characterized in that: The connecting rod (18) is provided with a mounting groove (20) for mounting the pawl (17); the pawl (17) is rotatably connected in the mounting groove (20) by a screw; the mounting groove (20) has a space for the pawl (17) to rotate; and an elastic column (34) for pressing the pawl (17) is elastically provided on a side wall of the mounting groove (20).

9. The tensioning mechanism of a baler according to claim 1, characterized in that: A reset spring (33) is provided between the movable frame (3) and the base (1) to connect the two. The reset spring (33) is used to drive the movable frame (3) to press down and reset.

10. The tensioning mechanism of a baler according to claim 1, characterized in that: One side of the movable frame (3) is provided with a baffle (36) for shielding the tension wheel (5), and a blocking portion (37) for blocking the packing belt extends from the bottom of the baffle (36).

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