Automatic adjusting device for cylinder cutter of environment-friendly bag and environment-friendly bag forming machine

Abstract

The application discloses an automatic adjusting device for a cylinder cutter of an environment-friendly bag forming machine and the environment-friendly bag forming machine, and relates to the technical field of environment-friendly bag forming. The application discloses an automatic adjusting device for a cylinder cutter of an environment-friendly bag forming machine and the environment-friendly bag forming machine, and relates to the technical field of environment-friendly bag forming. Compared with the prior art, the application has the beneficial effects that: by starting the first harmonic reducer, the meshing position of the first eccentric tooth and the second eccentric tooth is adjusted, the linear speed of the cutter is automatically adjusted on line; and by starting the second harmonic reducer, the meshing position of the first gear and the second gear is adjusted, the position of the cutter is automatically fine-adjusted on line.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forming of environment-friendly bags, and particularly relates to an automatic adjusting device for a cutting knife for forming of environment-friendly bags and an environment-friendly bag forming machine. BACKGROUND

[0002] At present, if the length of a formed tube of an environment-friendly bag needs to be adjusted, the position and speed of the cutting knife need to be adjusted under a stop state, which requires high experience of an operator and consumes a lot of time and energy of the operator, resulting in low efficiency of the cutting knife in adjusting the length of the formed tube of the environment-friendly bag, and it often takes several hours to adjust the length of the formed tube of the environment-friendly bag, which is time-consuming and laborious.

[0003] Therefore, there is an urgent need to develop an automatic adjusting device for a cutting knife for forming of environment-friendly bags and an environment-friendly bag forming machine to overcome the defects of the prior art. SUMMARY

[0004] The present application aims to disclose an automatic adjusting device for a cutting knife for forming of environment-friendly bags and an environment-friendly bag forming machine, which automatically adjusts the speed and position of the cutting knife online through a harmonic reducer to improve the adjusting efficiency.

[0005] The first application of the present application aims to provide an automatic adjusting device for a cutting knife for forming of environment-friendly bags.

[0006] The second application of the present application aims to provide an environment-friendly bag forming machine.

[0007] To achieve the above-mentioned first application, the present application provides an automatic adjusting device for a cutting knife for forming of environment-friendly bags, which comprises a bottom knife roller, a cutting knife roller, a driving assembly and a harmonic assembly.

[0008] The harmonic assembly comprises a first harmonic reducer, a first eccentric tooth, a second harmonic reducer and a second eccentric tooth, the first harmonic reducer drives the first eccentric tooth, the second harmonic reducer drives the second eccentric tooth, and the first eccentric tooth meshes with the second eccentric tooth.

[0009] A first gear coaxial with the second eccentric tooth is arranged, and a second gear and a third gear coaxial with the cutting knife roller are arranged, and the first gear meshes with the second gear.

[0010] The bottom knife roller is provided with a fourth gear, and the third gear meshes with the fourth gear.

[0011] The driving assembly drives the first eccentric tooth through a fifth gear.

[0012] Preferably, the cutting knife roller is provided with a cutting knife.

[0013] Preferably, the bottom knife roller is provided with at least one knife groove, and the cutting knife cuts off the formed tube when the cutting knife is inserted into the knife groove.

[0014] Preferably, when it is needed to adjust the linear speed of the cutter when it is inserted into the cutter slot, the first harmonic reducer is started to drive the first eccentric gear to change the meshing position of the first eccentric gear and the second eccentric gear.

[0015] Preferably, when it is needed to adjust the position of the cutter when it is inserted into the cutter slot, the second harmonic reducer is started to drive the first gear to change the meshing position of the first gear and the second gear.

[0016] Preferably, when the bag cylinder passes between the cutter and the cutter slot, the linear speed of the bag cylinder is V1, the linear speed of the cutter is V2, and V2:V1=(1.2-1.3):1.

[0017] Preferably, the cutter is provided with a handle avoiding position.

[0018] Preferably, the cutter slot comprises a first cutter slot and a second cutter slot.

[0019] Preferably, the first cutter slot and the second cutter slot are spaced 180°.

[0020] Based on the same inventive principle, to achieve the above-mentioned second invention purpose, the present application provides an environmental protection bag forming machine comprising the environmental protection bag forming cylinder cutter automatic adjusting device as recited in the first invention.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The cooperation of the first harmonic reducer, the first eccentric gear, the second harmonic reducer and the second eccentric gear can realize the online automatic adjustment of the linear speed of the cutter by starting the first harmonic reducer to adjust the meshing position of the first eccentric gear and the second eccentric gear, and can realize the online automatic fine adjustment of the position of the cutter by starting the second harmonic reducer to adjust the meshing position of the first gear and the second gear. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the cutter automatic adjusting device of the present application.

[0025] Figure 2It is a schematic diagram of the three-dimensional structure of the harmonic assembly of the present application.

[0026] Figure 3 It is a schematic diagram of the side view of the harmonic assembly of the present application.

[0027] Figure 4 It is a schematic diagram of the meshing of the first eccentric tooth and the second eccentric tooth of the present application.

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the automatic adjusting device of the cutting knife of the present application.

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the cutting knife roller of the present application.

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the bottom knife roller of the present application.

[0031] In the figure, 1 is the bottom knife roller; 11 is the fourth gear; 12 is the knife groove; 121 is the first knife groove; 122 is the second knife groove; 2 is the cutting knife roller; 21 is the second gear; 22 is the third gear; 23 is the cutting knife; 231 is the avoiding position; 3 is the driving assembly; 31 is the fifth gear; 4 is the harmonic assembly; 41 is the first harmonic reducer; 42 is the first eccentric tooth; 43 is the second harmonic reducer; 44 is the second eccentric tooth; and 45 is the first gear. DETAILED DESCRIPTION

[0032] The present application will be described in detail below in conjunction with the embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not a limitation on the present application, and equivalent transformations or substitutions of function, method, or structure made by those of ordinary skill in the art based on these embodiments are within the protection scope of the present application.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] The specific implementation process of the present application will be described below through multiple embodiments.

[0035] Embodiment 1

[0036] Reference Figures 1 to 7The embodiment discloses an automatic adjusting device for a cutting knife for an environmental protection bag cylinder.

[0037] Referring to Figures 1 to 7 The automatic adjusting device for the cutting knife for the environmental protection bag cylinder comprises a bottom knife roller 1, a cutting knife roller 2, a driving assembly 3 and a harmonic assembly 4. The harmonic assembly 4 comprises a first harmonic speed reducer 41, a first eccentric gear 42, a second harmonic speed reducer 43 and a second eccentric gear 44. The first harmonic speed reducer 41 drives the first eccentric gear 42, the second harmonic speed reducer 43 drives the second eccentric gear 44, and the first eccentric gear 42 meshes with the second eccentric gear 44. A first gear 45 is coaxially arranged with the second eccentric gear 44, a second gear 21 and a third gear 22 are coaxially arranged with the cutting knife roller 2, and the first gear 45 meshes with the second gear 21. The bottom knife roller 1 is provided with a fourth gear 11, and the third gear 22 meshes with the fourth gear 11. The driving assembly 3 drives the first eccentric gear 42 through a fifth gear 31.

[0038] Specifically, referring to Figure 4 The shaft distance D between the first eccentric gear 42 and the second eccentric gear 44 is a constant value and is equal to D1+D2. By adjusting the meshing position of the first eccentric gear 42 and the second eccentric gear 44, the speed of the bottom knife roller 1 and the cutting knife roller 2 when cooperating to cut the bag cylinder can be automatically adjusted online. Referring to Figures 1 to 5, specifically, the cutter roller 2 is provided with a cutter 23, the bottom cutter roller 1 is provided with at least one cutter groove 12, and the cutter 23 cuts off the bag cylinder when inserted into the cutter groove 12; under normal circumstances, that is, without the need to adjust the speed and position of the cutter 23, the driving assembly 3 drives the first eccentric tooth 42 through the fifth gear 31, the first eccentric tooth 42 engages the second eccentric tooth 44, the second eccentric tooth 44 drives the first gear 45, and the first gear 45 engages the second gear 21 and drives the third gear 22, and the third gear 22 engages the fourth gear 11, thereby realizing the cooperation of the driving of the bottom cutter roller 1 and the cutter roller 2; when the speed of the cutter 23 needs to be adjusted, that is, when the linear speed of the cutter 23 inserted into the cutter groove 12 needs to be adjusted, the first harmonic reducer 41 is started, and the ratio of D1 and D2 is fine-tuned under the condition that the shaft distance D between the first eccentric tooth 42 and the second eccentric tooth 44 remains unchanged, that is, the first harmonic reducer 41 is started, the first harmonic reducer 41 drives the first eccentric tooth 42, changes the engagement position of the first eccentric tooth 42 and the second eccentric tooth 44, thereby fine-tuning the speed of the cutter 23, and after the speed is adjusted, the first harmonic reducer 41 is stopped; in the case of using a harmonic reducer, there is no need to stop for speed adjustment, but automatic adjustment can be realized online, whether it is fine-tuning or replacing the length of the bag cylinder, the adjustment efficiency is very high, and the labor intensity and adjustment difficulty can be greatly reduced; when the position of the cutter 23 needs to be adjusted, that is, when the position of the cutter 23 inserted into the cutter groove 12 needs to be adjusted, the second harmonic reducer 43 is started, and since the second harmonic reducer 43 can have an output ratio of n:(n+1), where n is greater than or equal to 100, the second harmonic reducer 43 is started, the second harmonic reducer 43 drives the first gear 45, changes the engagement position of the first gear 45 and the second gear 21, thereby fine-tuning the cutting position of the cutter 23, and realizing the fine-tuning of the matching position of the cutter 23 and the cutter groove 12, and after fine-tuning, the second harmonic reducer 43 is stopped.

[0039] Referring to Figures 1 to 5 In order to make the cutting quality of the cutter 23 and the cutter groove 12 better and more beautiful when cooperating, the linear speed of the bag cylinder is V1 when passing between the cutter 23 and the cutter groove 12, the linear speed of the cutter 23 is V2, V2:V1=(1.2~1.3):1, and V2 exceeds V2 by 20%-30%; the speed of the cutter 23 can also be kept changing by controlling the driving speed of the driving assembly 3, that is, the speed of the cutter 23 is V3 when the cutter 23 and the cutter groove 12 do not cooperate, and under normal circumstances, V3 is less than V2; since the cutter 23 cuts off the bag cylinder once every revolution, the difference between V3 and V2 is controlled to realize the cutting of bag cylinders of different lengths.

[0040] Referring to Figures 5 to 7In order to prevent the handle from being cut off when the cutter 23 is matched with the cutter groove 12 to cut off the bag cylinder, the cutter 23 is provided with a handle avoiding position 231; in order to increase the versatility of the bottom cutter roller 1, the cutter groove 12 of the bottom cutter roller 1 has two, i.e. a first cutter groove 121 and a second cutter groove 122, and the first cutter groove 121 and the second cutter groove 122 are spaced 180°, i.e. the first cutter groove 121 and the second cutter groove 122 are distributed on opposite sides of the bottom cutter roller 1, the widths of the first cutter groove 121 and the second cutter groove 122 are different, and the first cutter groove 121 and the second cutter groove 122 can be matched with different cutters 23, and the first cutter groove 121 or the second cutter groove 122 is matched with the cutter 23 by adjusting the rotating position of the bottom cutter roller 1.

[0041] Through the cooperation of the first harmonic reducer 41, the first eccentric tooth 42, the second harmonic reducer 43 and the second eccentric tooth 44, the linear speed of the cutter is automatically adjusted online by starting the first harmonic reducer 41 and adjusting the meshing position of the first eccentric tooth 42 and the second eccentric tooth 44; in addition, the position of the cutter is automatically fine-tuned online by starting the second harmonic reducer 43 and adjusting the meshing position of the first gear 45 and the second gear 21.

[0042] Embodiment 2

[0043] The environmental protection bag forming machine comprises the automatic adjusting device for the environmental protection bag cylinder cutter as described in Embodiment 1. Specifically, the bag cylinder cutter of the environmental protection bag forming machine automatically adjusts the speed and fine-tunes the position online, avoids stopping to adjust, greatly reduces the labor intensity and labor time of the operator, has high adjustment efficiency, and reduces the adjustment time when switching the bag cylinder length.

[0044] The environmental protection bag forming machine disclosed in the embodiment has the same technical solutions as those in Embodiment 1, and please refer to Embodiment 1 for details, which will not be described here again.

Claims

1. An automatic adjustment device for the tube-forming cutter of eco-friendly bags, characterized in that, It includes a bottom knife roller, a cutting roller, a drive assembly, and a harmonic assembly. The cutting roller is provided with a cutting blade, and the bottom knife roller is provided with at least one cutting groove. When the cutting blade is inserted into the cutting groove, it cuts the bag tube. The harmonic component includes a first harmonic reducer, a first eccentric tooth, a second harmonic reducer, and a second eccentric tooth. The first harmonic reducer drives the first eccentric tooth, the second harmonic reducer drives the second eccentric tooth, and the first eccentric tooth meshes with the second eccentric tooth. A first gear is coaxially arranged with the second eccentric tooth, and a second gear and a third gear are coaxially arranged with the cutter roller, wherein the first gear meshes with the second gear; The bottom cutter roller is equipped with a fourth gear, and the third gear meshes with the fourth gear; The drive assembly drives the first eccentric tooth via the fifth gear; When it is necessary to adjust the linear speed of the cutter when it is inserted into the cutter groove, the first harmonic reducer is started. The first harmonic reducer drives the first eccentric tooth to change the meshing position of the first eccentric tooth and the second eccentric tooth. When it is necessary to adjust the position of the cutter when it is inserted into the cutter groove, the second harmonic reducer is activated, and the second harmonic reducer drives the first gear to change the meshing position of the first gear and the second gear; When the bag tube passes between the cutter and the groove, the linear velocity of the bag tube is V1, and the linear velocity of the cutter is V2, where V2:V1 = (1.2~1.3):1; The wheelbase between the first eccentric tooth and the second eccentric tooth is a constant.

2. The automatic adjustment device for the eco-friendly bag tube cutting knife as described in claim 1, characterized in that, The cutter is equipped with a handle clearance position.

3. The automatic adjustment device for the eco-friendly bag tube cutting knife as described in claim 2, characterized in that, The cutting groove includes a first cutting groove and a second cutting groove.

4. The automatic adjustment device for the eco-friendly bag tube cutting knife as described in claim 3, characterized in that, The first cutting groove and the second cutting groove are spaced 180° apart.

5. An eco-friendly bag forming machine, characterized in that, Includes the automatic adjustment device for the tube cutting knife of the environmentally friendly bag as described in any one of claims 1-4.

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