Circular knife slitting mechanism

Abstract

The utility model provides a circular knife slitting mechanism which comprises an upper knife shaft, a lower knife shaft, an adjusting shaft and a power arm controlled by a driving motor, the two ends of the upper knife shaft are fixedly connected with the adjusting shaft through a support, the end of the adjusting shaft is provided with an installation base part movably connected with the adjusting shaft through a bearing, and the power arm is connected with the upper knife shaft through a bearing. The power arm is connected with the mounting base part and can drive the mounting base part to move along a circumferential path, the outer side of the mounting base part is connected with a rotating motor, and the adjusting shaft penetrates through the mounting base part and is connected with the rotating motor; the upper cutter shaft is provided with a cutting circular knife perpendicular to the axis, and the lower cutter shaft is provided with a cutting groove corresponding to the cutting circular knife. Two-stage control over the cutting circular knife is carried out through the driving motor and the rotating motor, heat and knife edge abrasion caused by direct friction between the cutting circular knife and the cutting groove are avoided, and the service life of the cutting circular knife is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of longitudinal slitting, in particular to a circular knife slitting mechanism. Background Art

[0002] Slitting refers to cutting wide coils and sheets into two or more narrow materials longitudinally. Slitting into narrow materials can facilitate subsequent processing and is widely used in film, paper, fabric and other fields. For example, the inner lining paper of cigarette packaging boxes needs to be embossed with patterns by an embossing machine, and the width of the original inner lining paper of the packaging box is twice or several times that of the embossing machine. At this time, a slitting mechanism is generally set during the winding stage of the inner lining paper to cut the inner lining paper into sizes corresponding to the embossing machine.

[0003] In the prior art, a circular knife slitting machine usually includes an upper knife shaft with a circular cutting knife and a lower knife shaft with a cutting groove. The upper knife shaft is moved by a control mechanism so that the circular cutting knife is pushed into the cutting groove, so that the wide material passing through the upper knife shaft and the lower knife shaft can be longitudinally cut into narrow materials. Although the above technical solution can achieve the slitting of wide materials, the circular cutting knife will be in a state of continuous friction during use, and the temperature is high. On the one hand, the strength of the cutting edge is reduced and it is easy to be damaged, which affects the service life of the circular cutting knife. On the other hand, it will also affect the cutting effect. For example, when cutting the lining paper of the packaging box, the increase of paper scraps and dust will affect the working environment. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a circular knife slitting mechanism, which can adjust the relative position of the circular cutting knife and the groove, reduce the friction heat of the circular cutting knife, and increase the service life.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A circular knife slitting mechanism comprises an upper knife shaft, a lower knife shaft, an adjusting shaft and a power arm controlled by a driving motor, wherein the upper knife shaft, the lower knife shaft and the adjusting shaft are parallel to each other, and both ends of the upper knife shaft are fixedly connected to the adjusting shaft through a bracket, and an installation base is provided at the end of the adjusting shaft, and the adjusting shaft is movably connected to the installation base through a bearing, and the power arm is connected to the installation base and can drive the installation base to move along a circular path, and a rotating motor is connected to the outer side of the installation base, and the adjusting shaft passes through the installation base and is connected to the rotating motor; the upper knife shaft is provided with a cutting circular knife perpendicular to the axis, and the lower knife shaft is provided with a cutting groove corresponding to the cutting circular knife.

[0007] Furthermore, the circular knife slitting mechanism also includes a frame, and the ends of the lower knife shaft and the adjusting shaft are positioned and mounted on the frame.

[0008] Furthermore, the power arm includes a rotating arm, which includes a positioning shaft hole located in the middle and a positioning shaft movably matched with the positioning shaft hole, the positioning shaft is fixedly connected to the frame, and the two ends of the rotating arm are respectively connected to the driving motor and the adjusting shaft.

[0009] Furthermore, the power arm also includes a transition arm, and two ends of the transition arm are respectively connected to the rotating arm and the mounting base.

[0010] Furthermore, the power arm includes a first connecting hole and a second connecting hole near both ends, the first end of the power arm is movably connected to the drive motor via a first rotating shaft passing through the first connecting hole, and the second end of the power arm is connected to the transition arm via a second rotating shaft passing through the second connecting hole.

[0011] Furthermore, the second connecting hole is a strip-shaped hole whose length direction is consistent with the extension direction of the power arm.

[0012] Furthermore, the circular knife slitting mechanism also includes a touch pressure switch installed on the frame, and the touch pressure switch is located at a lower position close to the first end of the rotating arm.

[0013] Furthermore, the ends of the upper cutter shaft and the lower cutter shaft are provided with gear sets that can mesh with each other.

[0014] Furthermore, a fine-tuning component is fixedly connected to the adjusting shaft, and the fine-tuning component includes an adjusting block that can move along the axial direction of the upper knife shaft. The first end of the adjusting block is connected to a fine-tuning motor, and the second end is connected to a movable abutment wheel whose rotating plane is parallel to the axis of the upper knife shaft. The movable abutment wheel abuts against the side of the cutting circular knife.

[0015] Furthermore, the circular knife slitting mechanism also includes a protective cover, which includes a cover body fixedly connected to the adjusting shaft and a movable cover plate hinged to the cover body, and the cover body is provided with a protective switch that can be triggered by the movable cover plate.

[0016] In summary, the application of the utility model can achieve the following beneficial effects:

[0017] 1. The utility model performs two-level control of the cutting circular knife through a driving motor and a rotating motor. The driving motor is used to control the cutting circular knife to reach the working position and cooperate with the cutting groove. The rotating motor is used to control the distance between the cutting circular knife and the inner wall of the cutting groove, so as to avoid the heat generated by direct friction between the cutting circular knife and the cutting groove and cause the blade to wear, thereby improving the working life of the cutting circular knife.

[0018] 2. The utility model adjusts the position of the cutting circular knife by rotating the motor, can adapt to cutting circular knives of different sizes, and has strong versatility.

[0019] 3. The utility model uses two-stage rotation control of the power arm and the bracket to ensure the range of motion of the upper knife shaft while enabling the upper knife shaft to maintain coordination with the lower knife shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the top view of the circular knife slitting mechanism in the embodiment;

[0021] Figure 2 It is a side view structural schematic diagram of the circular knife slitting mechanism in the embodiment;

[0022] Figure 3 A schematic diagram of a top view of a circular knife slitting mechanism in another embodiment;

[0023] Figure 4 for Figure 3 Schematic diagram of the structure of the fine-tuning component;

[0024] Figure 5 A schematic diagram of a top view of a circular knife slitting mechanism in another embodiment;

[0025] Figure 6 for Figure 5 Schematic diagram of the structure of the middle protective cover;

[0026] In the figure, 1-upper knife shaft, 11-cutting circular knife, 12-upper gear, 13-fine-tuning assembly, 131-fine-tuning motor, 132-adjusting block, 133-abutting wheel, 14-protective cover, 141-cover body, 142-movable cover plate, 143-hinge, 144-protective switch, 2-lower knife shaft, 21-cutting groove, 22-lower gear, 3-adjusting shaft, 4-bracket, 5-mounting base, 6-rotating motor, 7-frame, 71-touch switch, 8-power arm, 81-rotating arm, 82-transition arm, 83-positioning shaft, 84-first rotating shaft, 85-second rotating shaft, 9-driving motor. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0028] Reference Figure 1 and Figure 2The embodiment of the first aspect of the utility model provides a circular knife slitting mechanism, which includes an upper knife shaft 1, a lower knife shaft 2, an adjusting shaft 3, a power arm 8 controlled by a driving motor 9, and a frame 7. The upper knife shaft, the lower knife shaft and the adjusting shaft are parallel to each other, and the two ends of the upper knife shaft are fixedly connected to the adjusting shaft through a bracket 4. The power arm is connected to the adjusting shaft and can drive the adjusting shaft to move in the circumferential direction;

[0029] The two ends of the upper cutter shaft 1 are movably connected to the first end of the bracket 4 through bearings, and the second end of the bracket is fixedly connected to the adjusting shaft 3. A cutting circular knife 11 which can rotate with the upper cutter shaft is provided in the middle of the upper cutter shaft. The cutting circular knife is perpendicular to the axis of the upper cutter shaft, and an upper gear 12 is provided at the end of the upper cutter shaft.

[0030] The end of the lower cutter shaft 2 is positioned and installed on the frame through a bearing, a cutting groove 21 corresponding to the position of the cutting circular cutter 11 is provided in the middle of the lower cutter shaft, and a lower gear 22 that can mesh with the upper gear 12 is provided at the end of the lower cutter shaft;

[0031] Both ends of the adjusting shaft 3 are provided with mounting bases 5, the ends of the adjusting shaft pass through the mounting bases and are movably connected with the mounting bases through bearings, one end of the adjusting shaft is connected with a rotating motor 6 which can drive the adjusting shaft to rotate around the axis, and the rotating motor is fixedly mounted on the outside of the mounting base; when the adjusting shaft is driven by the rotating motor to rotate, the adjusting shaft will drive the bracket 4 to move, thereby causing the upper knife shaft to move along a circular path;

[0032] The power arm 8 includes a rotating arm 81 and a transition arm 82. The rotating arm 81 includes a positioning shaft hole located in the middle and a first connecting hole and a second connecting hole relatively close to both ends. The second connecting hole is a strip hole with a length direction consistent with the extension direction of the rotating arm. The positioning shaft hole is movably matched with the positioning shaft 83, and the positioning shaft is fixedly connected to the frame. The first end of the rotating arm is movably connected to the push rod end of the driving motor 9 through a first rotating shaft 84 passing through the first connecting hole. The driving motor 9 can rotate the rotating arm around the positioning shaft through the push rod. The second end of the rotating arm is movably connected to the transition arm 82 through a second rotating shaft 85 passing through the second connecting hole. The second rotating shaft is relatively fixed to the transition arm, and one end of the transition arm is fixedly connected to the mounting base 5.

[0033] The working principle of the utility model is as follows: first, the rotating arm is controlled to rotate by driving the motor 9, thereby driving the upper knife shaft to move on a circular path. The lower knife shaft is arranged on the moving path of the upper knife shaft. When the gears of the upper knife shaft and the lower knife shaft are meshed, the driving motor 9 enters a locked state, and then the adjusting shaft 3 is controlled to rotate by the rotating motor 6. The adjusting shaft 3 drives the upper knife shaft to move on another circular path, thereby adjusting the relative position of the cutting circular knife and the cutting groove. While ensuring the cutting function, the cutting circular knife and the inner wall of the cutting groove do not have direct friction, thereby reducing the friction heat of the cutting circular knife in the working state and improving the service life of the cutting circular knife.

[0034] In some other embodiments, reference Figure 2 A touch-pressure switch 71 can also be set at the lower side of the rotating arm 81 near the first end. The touch-pressure switch forms a signal connection with the rotating motor. When the first end of the rotating arm moves downward and makes the upper gear mesh with the lower gear, the rotating arm contacts the touch-pressure switch 71, and the rotating motor 6 enters an activated state, which can control the rotation of the adjusting shaft.

[0035] In some other embodiments, reference Figure 3 and Figure 4 A fine-tuning component 13 is fixedly connected to the adjusting shaft, and the fine-tuning component includes a fine-tuning motor 131, an adjusting block 132 driven by the fine-tuning motor, and an abutment wheel 133 whose rotating plane is connected to the end of the adjusting block and is parallel to the axis of the lower knife shaft. The abutment wheel can movably abut against the side of the cutting circular knife and adjust the angle of the cutting circular knife to keep the cutting circular knife in a vertical state.

[0036] In some other embodiments, reference Figure 5 and Figure 6 The adjusting shaft is fixedly connected with a protective cover 14, and the protective cover includes a cover body 141 and a cover plate 142 movably connected to the cover body through a hinge 143. The cover body is provided with a protective switch 144. The movable end of the cover plate can contact the protective switch. When the protective switch is pressed, the equipment can be powered on and cut, which ensures personal safety and prevents other objects from accidentally touching the cutting circular knife.

[0037] In some other embodiments, a negative pressure dust suction mechanism may be further provided below the lower knife shaft, which may remove debris such as paper scraps and dust generated during the slitting process, while accelerating air flow to reduce the temperature of the circular cutting knife.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A circular knife slitting mechanism, characterized in that: It includes an upper knife shaft, a lower knife shaft, an adjusting shaft and a power arm controlled by a driving motor, the upper knife shaft, the lower knife shaft and the adjusting shaft are parallel to each other, the two ends of the upper knife shaft are fixedly connected to the adjusting shaft through a bracket, the end of the adjusting shaft is provided with a mounting base, the adjusting shaft is movably connected to the mounting base through a bearing, the power arm is connected to the mounting base and can drive the mounting base to move along a circular path, the outer side of the mounting base is connected to a rotating motor, the adjusting shaft passes through the mounting base and is connected to the rotating motor; the upper knife shaft is provided with a cutting circular knife perpendicular to the axis, and the lower knife shaft is provided with a cutting groove corresponding to the cutting circular knife.

2. A circular knife slitting mechanism according to claim 1, characterized in that: It also includes a frame, on which the ends of the lower cutter shaft and the adjusting shaft are positioned and installed.

3. A circular knife slitting mechanism according to claim 1, characterized in that: The power arm comprises a rotating arm, which comprises a positioning shaft hole in the middle and a positioning shaft movably matched with the positioning shaft hole, the positioning shaft is fixedly connected to the frame, and the two ends of the rotating arm are respectively connected to the driving motor and the adjusting shaft.

4. A circular knife slitting mechanism according to claim 3, characterized in that: The power arm also includes a transition arm, and two ends of the transition arm are respectively connected to the rotating arm and the mounting base.

5. A circular knife slitting mechanism according to claim 4, characterized in that: The power arm includes a first connecting hole and a second connecting hole near both ends. The first end of the power arm is movably connected to the driving motor via a first rotating shaft passing through the first connecting hole, and the second end of the power arm is connected to the transition arm via a second rotating shaft passing through the second connecting hole.

6. A circular knife slitting mechanism according to claim 5, characterized in that: The second connecting hole is a strip-shaped hole whose length direction is consistent with the extending direction of the power arm.

7. A circular knife slitting mechanism according to claim 3, characterized in that: The circular knife slitting mechanism also includes a touch pressure switch installed on the frame, and the touch pressure switch is located at a lower side position close to the first end of the rotating arm.

8. The circular knife slitting mechanism according to claim 1, characterized in that: The ends of the upper cutter shaft and the lower cutter shaft are provided with gear sets that can mesh with each other.

9. The circular knife slitting mechanism according to claim 1, characterized in that: A fine-tuning assembly is fixedly connected to the adjusting shaft, and the fine-tuning assembly includes an adjusting block that can move along the axial direction of the upper knife shaft. The first end of the adjusting block is connected to a fine-tuning motor, and the second end is connected to a movable abutment wheel whose rotating plane is parallel to the axis of the upper knife shaft. The movable abutment wheel abuts against the side of the cutting circular knife.

10. The circular knife slitting mechanism according to claim 1, characterized in that: A protective cover is fixedly connected to the adjusting shaft. The protective cover comprises a cover body and a movable cover plate hinged to the cover body. A protective switch which can be triggered by the movable cover plate is arranged on the cover body.

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