CN212445381U

CN212445381U - Automatic cutting machine

Info

Publication number: CN212445381U
Application number: CN202020526886.4U
Authority: CN
Inventors: 崔海瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-02-02
Anticipated expiration: 2030-04-10

Abstract

The utility model discloses an automatic cutting machine, which comprises a frame, a cutter component, a first lifting structure connected on the frame in a liftable way and lifting power used for driving the first lifting structure, wherein the frame is provided with a discharging platform, the cutter component comprises an upper cutter which is connected on the first lifting structure and can move up and down along the direction vertical to the discharging platform, the first lifting structure comprises a cam in transmission connection with a power output shaft of the lifting power, a crank with a first end eccentrically hinged with the cam, a lifting rod hinged with a second end of the crank and a vertical slide way for the lifting rod to move up and down, and the upper cutter is connected with the lifting rod; the two ends of the upper cutter in the length direction are provided with first lifting structures, and lifting power is connected with the two cams in a synchronous transmission mode. The lifting structure is smooth in transmission, drives the cutter to lift rapidly and smoothly, improves cutting efficiency, and is simple in structure, and the cost can be reduced to a certain degree.

Description

Automatic cutting machine

Technical Field

The utility model relates to a cut technical field, more specifically say, relate to an automatic guillootine.

Background

The cutting process is widely applied to the industries of cloth, leather, bags and the like, and a cutting machine is often needed to cut the whole disc of blank into sections according to the requirements, so that the packaging is convenient. The blank to be cut relates to nylon woven belts, thin plates, plastic pipes or long ropes in the clothing and luggage industry. Traditional guillootine includes frame, cut-off knife, actuating mechanism, and the cut-off knife setting with liftable is on the knife rest, and the blank is cuted by actuating mechanism drive cut-off knife decline, cuts the completion back, and actuating mechanism drives the cut-off knife and resets, so relapse, cuts the blank. The cut of the blank is required to be complete and beautiful, and the cut edge is neat and smooth. Therefore, the lifting operation of the cutting knife must be smooth, otherwise the cutting knife with larger length is easy to be blocked with the frame or cut slowly.

Therefore, the smoothness of the cutting knife is always the focus of the research of those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can drive smooth-going automatic guillootine that goes up and down of cut-off knife, its elevation structure transmission is smooth-going, drives the quick smooth and easy lift of cut-off knife, improves and cuts efficiency, and simple structure can a certain degree reduce cost.

In order to achieve the above object, the utility model provides an automatic cutting machine, including frame, cut-off knife subassembly, liftable ground connect the first elevation structure in the frame and be used for driving the lift power of first elevation structure, the frame is provided with the blowing platform, the cut-off knife subassembly includes last cut-off knife, go up the cut-off knife and connect on the first elevation structure and along the direction lift displacement of perpendicular to the blowing platform, the first elevation structure includes the cam that is connected with the power output shaft transmission of lift power, first end and the eccentric articulated crank of cam, with the second end articulated lifter of crank and supply the vertical slide of lifter lift displacement, go up the cut-off knife with the lifter is connected; the two ends of the length direction of the upper cutter are provided with the first lifting structures, and the lifting power is connected with the two cams in a synchronous transmission mode.

Preferably, the rack comprises two fixed seats connected to two sides of the discharge table, each fixed seat is provided with a through groove extending in the vertical direction and having two open ends to form the vertical slide way, and the lifting rod is slidably connected in the through groove; two lifting rods positioned at two ends of the upper cut-off knife are fixedly connected through a cross beam, and the upper cut-off knife is fixedly connected with the cross beam along the length direction.

Preferably, the lifting power is set as a first motor, a power output shaft of the first motor is in transmission connection with a cam shaft through gear transmission, the two cams are respectively and fixedly connected to two ends of the cam shaft, and the cam shaft is rotatably fixed on the rack.

Preferably, the size of the lifting rod is in clearance fit with that of the through groove, and an anti-deflection device is arranged between the lifting rod and the through groove; the anti-deflection device comprises a clamping plate which is used for being abutted to the rod wall of the lifting rod, an embedded groove for embedding the clamping plate is formed in the fixing seat, a fixing groove is formed in one side, away from the lifting rod, of the clamping plate, a fixing groove is formed in the fixing groove, one end of the compression spring is abutted to the fixing seat, and the other end of the compression spring is abutted to the clamping plate.

Preferably, the lifting rod and the cross beam are of an integrated structure.

Preferably, the cutter assembly further comprises a lower cutter embedded in the frame, and the lower cutter is located below the upper cutter and aligned with the upper cutter.

Preferably, the feeding device is positioned at the upstream of the upper cutter, the feeding device comprises a feeding roller, a pressing roller and feeding power in transmission connection with the feeding roller, the feeding roller is in transmission connection with the pressing roller, the pressing roller and the feeding roller are coaxially arranged and rotatably connected to the rack, and the pressing roller is in liftable connection with the rack through a second lifting structure to generate displacement far away from or close to the feeding roller; the controller with go up and down power reaches the equal electricity of feeding power is connected, be provided with in the frame with controller communication connection's setting panel.

Preferably, the second lifting structure comprises a moving shaft and a lifting piece, a first end of the lifting piece is rotatably connected with the rack, a second end of the lifting piece is located below the moving shaft and used for supporting the moving shaft, and the press roller is tubular and rotatably sleeved on the moving shaft.

Preferably, the second elevation structure still includes slide bar and compression spring, the frame contains and is located the roof of blowing platform top, the one end of slide bar with remove axle fixed connection, the other end run through the roof extremely the roof top, be provided with the confession on the roof the through-hole of slide bar sliding displacement, the compression spring cover is established on the slide bar and be located remove the axle with between the roof.

Preferably, the feeding power is set as a second motor, the second motor is electrically connected with a two-way switch for controlling the forward rotation and the reverse rotation of the second motor, a power output shaft of the second motor is in transmission connection with a transition gear through belt transmission and is provided with a tension wheel for tensioning a belt, the tension wheel is connected to the rack and is provided with a displacement adjusting structure, the transition gear is in transmission connection with a gear of the feeding roller, and the feeding roller is in transmission connection with a gear of the compression roller.

In the technical scheme provided by the utility model, the upper cutter of the automatic cutting machine is repeatedly lifted along the direction vertical to the discharge table through the first lifting structure so as to cut the blank; the first lifting structure comprises a cam in transmission connection with a power output shaft of lifting power, a crank with a first end eccentrically hinged with the cam, a lifting rod hinged with a second end of the crank, and a vertical slideway for lifting displacement of the lifting rod. And both ends of the length direction of the upper cut-off knife are provided with lifting rods, and the lifting power is in synchronous transmission with the two lifting rods.

When the power output shaft of the lifting power rotates, the two cams synchronously rotate along with the power output shaft and respectively drive the two cranks to eccentrically rotate around the cams, and when the two cranks rotate from the top point to the lowest point in the vertical direction, the two lifting rods are synchronously pulled to descend so that the upper cutter moves downwards for cutting; when the two cranks rotate from the lowest point to the top point, the two lifting rods are synchronously pushed to move upwards to drive the upper cutting knife to ascend and reset. The structure is simple and effective, the power output shaft drives the cam to rotate, the cam is hinged with the crank, the crank is hinged with the lifting rod, the transmission is smooth and smooth, the cam and the crank are not blocked, the lifting times of the upper cutter are related to the rotating speed of the cam, and the cutting frequency can be adjusted by adjusting the rotating speed of the power output shaft of the lifting power.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a first lifting structure of an automatic cutting machine according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of an automatic cutting machine according to an embodiment of the present invention;

FIG. 3 is a schematic view of the upper cutter according to an embodiment of the present invention;

fig. 4 is a schematic position diagram of an anti-deflection device in an embodiment of the present invention;

fig. 5 is a schematic diagram of the anti-deviation device in the embodiment of the present invention;

fig. 6 is a schematic connection diagram of an anti-deflection device according to an embodiment of the present invention;

fig. 7 is a schematic diagram of the feeding device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a second lifting structure in an embodiment of the present invention.

In fig. 1-8:

1. a frame; 101. a discharge table; 102. a top plate; 2. mounting a cutter; 21. a first lifting structure; 211. a cam; 212. a crank; 213. a lifting rod; 214. a fixed seat; 215. a cross beam; 216. a splint; 217. a camshaft; 3. a lower cutter; 4. a feeding device; 401. a compression roller; 402. a feed roll; 403. a second pulley; 404. A transition gear; 405. a tension wheel; 411. a movable shaft; 412. lifting the sheet; 413. a slide bar.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

An object of this embodiment is to provide an automatic cutting machine capable of driving a cutter to smoothly go up and down, wherein the lifting structure of the automatic cutting machine is smooth in transmission, the cutter is driven to go up and down rapidly and smoothly, the cutting efficiency is improved, and the structure is simple, and the cost can be reduced to a certain degree.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1-8, the present embodiment provides an automatic cutting machine, which includes a frame 1, a cutter assembly, a first lifting structure 21 and a lifting power for driving the first lifting structure 21, wherein the cutter assembly includes an upper cutter 2, the upper cutter 2 is connected to the frame 1 through the first lifting structure 21 in a lifting manner, a material placing table 101 for placing a blank to be cut is disposed on the frame 1, the upper cutter 2 is located above the material placing table 101, and the first lifting structure 21 drives the upper cutter 2 to move up and down along a direction perpendicular to the material placing table 101, and thus, the blank is cut and divided repeatedly. The blank can be manually pushed and pulled or automatically fed by the feeding device 4. Meanwhile, the first lifting structure 21 is set as follows: as shown in fig. 1, the first lifting structure 21 includes a cam 211 in transmission connection with a power output shaft of the lifting power, a crank 212 with a first end eccentrically hinged to the cam 211, a lifting rod 213 hinged to a second end of the crank 212, and a vertical slide for lifting and lowering the lifting rod 213. When the power output shaft of the lifting power rotates, the cam 211 rotates synchronously with the power output shaft and drives the crank 212 to rotate eccentrically around the cam 211, and when the crank 212 rotates from the top point to the lowest point in the vertical direction, the lifting rod 213 is pulled to descend, so that the upper cutter 2 moves downwards to cut; when the crank 212 rotates from the lowest point to the top point, the lifting rod 213 is pushed to move upwards to drive the upper cutting knife 2 to ascend and reset. This simple structure is effective, power output shaft takes cam 211 to rotate, cam 211 is articulated through pivot and crank 212, crank 212 is articulated through pivot and lifter 213, the transmission is smooth and smooth not to block between each other, and the lift number of times of going up cut-off knife 2 is relevant with the slew velocity of cam 211, just can adjust cutting frequency through the rotational speed of the power output shaft of adjustment lift power to the cooperation blank is marchd, can cut into the material area of different length requirements with the blank according to the demand.

The two ends of the length direction of the upper cutting knife 2 can be both provided with the same first lifting structure 21, that is, the two ends of the upper cutting knife 2 are both provided with a lifting rod 213, and the two ends are both driven by lifting. And the lifting power is synchronously connected with the two cams 211 in a transmission way, so that the lifting synchronism of the two lifting rods 213 can be ensured. Frame 1 is including connecting two fixing bases 214 in blowing platform 101 both sides, and two vertical slides are located two fixing bases 214 respectively, can all be formed by leading to the groove on the fixing base 214. The lifting rod 213 is positioned in the through groove, the first end of the lifting rod is hinged with the crank 212, and the second end of the lifting rod is fixedly connected with the upper cut-off knife 2. The elevating rod 213 is in clearance fit with the through groove, and can smoothly perform vertical elevation.

So set up, compare with the elevation structure on guillootine or the cutting tape unit among the prior art, the automatic guillootine that this embodiment provided, the first elevation structure 21 that 2 goes up and down of cut-off knife is simple and not numerous and complicated in its drive, can reduce the cost of automatic guillootine to a certain extent, and the transmission is synchronous and smooth and smooth, all does not have the card pause between each component part, and 2 quick lifts of cut-off knife in the drive that can be smooth-going smooth, and the lifting frequency who goes up cut-off knife 2 is convenient for adjust.

Further, in this embodiment, the second ends of the two lifting rods 213 at the two ends of the upper cutter 2 are connected by a cross beam 215, and the upper cutter 2 is fixedly connected with the cross beam 215 along the length direction. If hot cutting is performed, that is, the upper cutter 2 needs to be heated by an electric heating rod, and the upper cutter 2 has a certain thickness, as shown in fig. 1, the back of the upper cutter 2 is connected with the beam 215 through a fastener or a cutter holder; if the upper cutter 2 is made thinner by cold cutting, as shown in fig. 2 and 3, the upper cutter 2 is fixedly connected to the cross member 215 along the longitudinal direction, and has a larger abutting area with the cross member 215 along the width direction, and only the blade portion protrudes below the cross member 215. So set up, compare in last cut-off knife 2 and lifter 213 lug connection, go up cut-off knife 2 and be connected with crossbeam 215 and can make the connection area bigger, connect firmly, the transmission is more smooth and easy.

In the preferred scheme of this embodiment, as shown in fig. 3, the beam 215 and the lifting rod 213 are in an integrated structure, so that the strength is higher, the number of joints is reduced, the transmission obstruction is further reduced, and the transmission smoothness is enhanced.

As shown in fig. 1, 2, 3 and 4, the fixing base 214 forming the vertical slideway may be of an integral structure, formed by a single plate, or formed by connecting a plurality of plates.

As shown in fig. 2, the lifting power is a first motor, a power output shaft of the first motor is in transmission connection with the cam shaft 217 through gear transmission, the two cams 211 are respectively and fixedly connected to two ends of the cam shaft 217, and the cam shaft 217 is rotatably connected to the frame 1 through a bearing. So set up, two cams 211 of a power through a camshaft 217 synchronous drive, the transmission is smooth and fast in step, can guarantee the synchronism of two lifter bars 213, goes up cut-off knife 2 and all goes up and down, cuts each blank simultaneously along self length direction in step.

The first motor can also be connected with a reduction box. A box body is arranged below the discharging platform 101 of the machine frame 1 and can be used for placing devices such as a motor, a reduction gearbox and the like. Through holes are arranged on two side walls of the box body, and the cam shaft 217 is connected with the through holes through bearings and is installed on the box body.

The outer diameter of the lifting rod 213 is in clearance fit with the inner diameter of the vertical slide, and in order to prevent the lifting rod 213 from being inclined left and right during lifting, an anti-inclination device is arranged between the lifting rod 213 and the vertical slide. As shown in fig. 4 to 6, the anti-deviation device includes a clamping plate 216 for abutting against the rod wall of the lifting rod 213, and an insertion groove for inserting the clamping plate 216 is provided on the groove wall of the through groove of the fixed seat 214 forming the vertical slideway. The clamping plate 216 is placed into the embedded groove and is telescopically connected with the fixing seat 214, that is, a fixing groove is formed in the plate surface of one side, away from the lifting rod 213, of the clamping plate 216, and a compression spring is arranged in the fixing groove, wherein one end of the compression spring is abutted against the fixing seat 214, and the other end of the compression spring is abutted against the clamping plate 216. One side plate surface of the clamping plate 216 is tightly pressed against the fixed seat 214 through the compression spring, and the other side plate surface is tightly pressed against the rod wall of the lifting rod 213. Under the thrust of the compression spring, the clamping plates 216 can abut against the outer rod wall of the lifting rod 213, as shown in fig. 6, the clamping plates 216 can be arranged on the left side and the right side of the lifting rod 213, and under the abutting action of the two clamping plates 216, the gap between the lifting rod 213 and the through groove wall is offset, so that the lifting rod 213 can keep vertical lifting and cannot be inclined. Of course, both contact surfaces of the clamping plate 216 against the lifting rod 213 need to be smooth enough, i.e. high in smoothness, to prevent high friction.

Further, the cutter assembly in this embodiment further includes a lower cutter 3, as shown in fig. 2, the lower cutter 3 is embedded in the material placing table 101, the cutting edge faces the direction away from the material placing table 101, the cutting edge slightly protrudes from the upper end surface of the material placing table 101, that is, the end surface on which the blank is placed, and the lower cutter 3 and the upper cutter 2 are relatively arranged in a right angle to cut the blank together. The upper cutter 2 and the lower cutter 3 cut the blank together, so that the blank can be cut off more rapidly and cleanly. The lower cutting knife 3 can be in a blade shape and is connected to a knife holder through a fastening screw, and the knife holder is located below the material placing table 101 and is fixedly connected with the rack 1. The discharging table 101 can be divided into two parts located on two sides of the lower cutting knife 3, the two parts clamp the lower cutting knife 3 tightly, and then the lower cutting knife 3 is detachably connected through a fastener, so that the lower cutting knife 3 can be conveniently detached and replaced. A portion of the discharge table 101 located downstream of the lower cutter 3 forms a discharge end of the discharge table 101.

Further, in this embodiment, the automatic cutting machine not only includes the frame 1, the material placing table 101, the upper cutter 2 or the cutter assembly, the first lifting structure 21, but also includes the feeding device 4 for driving the blank to advance. So set up, the automatic guillootine that this embodiment provided collects the feeding, cuts as an organic whole, and convenient to use cuts the high efficiency.

As shown in fig. 2, 3 and 7, the feeding device 4 is located at the upstream of the feeding direction, that is, at the front side of the thickness direction of the upper cutter 2, the feeding device 4 includes a feeding roller 402, a pressing roller 401 and a feeding power in transmission connection with the feeding roller 402, the feeding roller 402 is in transmission connection with the pressing roller 401, the pressing roller 401 and the feeding roller 402 are coaxially arranged and both rotatably connected to the frame 1, and the pressing roller 401 is connected to the frame 1 through the second lifting structure 41 in a lifting manner so as to generate a displacement away from or close to the feeding roller 402. The press roll 401 can be lifted to form a gap for the blank to pass through with the feed roll 402, after the blank passes through, the press roll 401 is put down, the press roll 401 and the feed roll 402 clamp the blank between the press roll 401 and the feed roll 402, and when the feed power drives the feed roll 402 to rotate, the feed roll 402 drives the press roll 401 to rotate, so that the blank can be automatically driven to advance.

Feeding power can set up to the second motor, and the second motor can be connected with the two-way switch that is used for controlling second motor corotation and reversal, then feed arrangement 4 not only can carry out automatic feed can also carry out the material returned, and the reinforcing is used multifunctionality and convenience. The controller can be a PLC (programmable logic controller) with the type of Siemens smart-in the prior art, the controller is electrically connected with the first motor and the second motor, the cutting times at each time can be set by arranging the panel, and the cutting length can be set by setting the rotating speed of the first motor and the rotating speed of the second motor in proportion.

As shown in fig. 2 and 7, the second lifting structure 41 includes a moving shaft 411 and a lifting piece 412, the pressing roller 401 is tubular and is rotatably sleeved on the moving shaft 411, the pressing gear is fixedly connected with the pressing roller 401, an end of the moving shaft 411 penetrates through the pressing gear, and the pressing gear is rotatably connected with the moving shaft 411 through a bearing; the lift plate 412 has a first end rotatably coupled to the housing 1 via a rotation shaft and a second end located below an end of the moving shaft 411 to support the moving shaft 411. When the lifting piece 412 is rotated, the second end of the lifting piece 412 tilts upwards, the moving shaft 411 and the press roller 401 sleeved on the moving shaft 411 can be lifted, a gap is generated between the press roller 401 and the feed roller 402, a blank passes through the gap, the lifting piece 412 is reset, the press roller 401 presses downwards to clamp the blank with the feed roller 402, and the material pressing gear is meshed with the feed gear on the feed roller 402 again. With the arrangement, the second lifting structure 41 is simple, convenient and practical, and the pressing roller 401 can be lifted smoothly.

Further, as shown in fig. 8, the second lifting structure 41 further includes a sliding rod 413 and a return spring, the rack 1 includes a top plate 102 located above the material placing table 101, one end of the sliding rod 413 is fixedly connected to the upper portion of the end of the moving shaft 411, the other end of the sliding rod 413 penetrates through the top plate 102, a through hole through which the sliding rod 413 can pass and slide is provided on the top plate 102, and a compression spring sleeved on the sliding rod 413 is provided between the moving shaft 411 and the top plate 102. When the moving shaft 411 and the pressing roller 401 sleeved on the moving shaft 411 are lifted, the moving shaft 411 moves upwards to compress the return spring; when the lifting piece 412 is released, the return spring restores the elastic deformation to make the press roller 401 automatically fall.

One end of the sliding rod 413 positioned above the top plate 102 can be further provided with a boss to prevent the sliding rod 413 from sliding out of the through hole of the top plate 102, and the other end can be provided with a block body to be sleeved on the moving shaft 411 to realize fixed connection with the moving shaft 411. The first end of the lifting piece 412 can be provided with a pressure lever, so that a user can conveniently grasp and press the pressure lever, and the pressure roller 401 can be conveniently lifted.

The feed roller 402 is sleeved on a connecting shaft coaxial with the feed roller 402, a moving shaft 411 different from the press roller 401 is supported by a lifting piece 412, the connecting shaft of the feed roller 402 is fixedly connected with the rack 1, and the feed roller 402 and the feed gear are fixedly connected and can be sleeved on the connecting shaft together in a rotating manner.

As shown in fig. 7, a power output shaft of the second motor is in transmission connection with a transition gear 404 through belt transmission, the power output shaft is fixedly connected with a first belt pulley for synchronous rotation, a second belt pulley 403 is connected with the frame 1 through a first rotating shaft, the transition gear 404 is connected with the frame 1 through a second rotating shaft, and the first rotating shaft and the second rotating shaft are fixedly connected through a connecting piece, so that the second belt pulley 403 drives the transition gear 404 to rotate. Transition gear 404 is connected with feed roll 402 gear drive, and feed roll 402 and compression roller 401 pass through gear drive and are connected, are provided with the feeding gear on the feed roll 402, are provided with the pressure material gear on the compression roller 401, and feeding gear and pressure material gear all fixed connection are at the tip of respective long roller.

As shown in fig. 2 and 7, a tension pulley 405 for tensioning a belt is disposed between the first pulley and the second pulley 403, and the tension pulley 405 is movably connected with the frame 1 through a displacement adjusting structure. The displacement adjustment structure may specifically be set as follows: a sliding groove is arranged on the frame 1, one end of the fixed shaft is clamped into the sliding groove and is detachably connected with the frame 1 through a fastening piece, and the other end of the fixed shaft is sleeved with a tension wheel 405. The position of the tension pulley 405 can be adjusted by moving the fixed position of the fixed shaft in the sliding groove.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The utility model provides a plurality of schemes contain the basic scheme of itself, mutual independence to restrict each other, but it also can combine each other under the condition of not conflicting, reaches a plurality of effects and realizes jointly.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic cutting machine is characterized by comprising a frame (1), a cutter component, a first lifting structure (21) connected to the frame (1) in a lifting way and lifting power used for driving the first lifting structure (21), the rack (1) is provided with a material placing platform (101), the cutter component comprises an upper cutter (2), the upper cutter (2) is connected to the first lifting structure (21) and is lifted and displaced along the direction vertical to the discharge table (101), the first lifting structure (21) comprises a cam (211) in transmission connection with a power output shaft of the lifting power, a crank (212) with a first end eccentrically hinged with the cam (211), a lifting rod (213) hinged with a second end of the crank (212) and a vertical slide rail for lifting and displacement of the lifting rod (213), and the upper cut-off knife (2) is connected with the lifting rod (213); go up the length direction's of cut-off knife (2) both ends and all be provided with first elevation structure (21), lift power and two cam (211) synchronous transmission is connected.

2. The automatic cutting machine according to claim 1, wherein the frame (1) comprises two fixing seats (214) connected to both sides of the material placing table (101), each fixing seat (214) is provided with a through groove extending in a vertical direction and having two open ends to form the vertical slideway, and the lifting rod (213) is slidably connected in the through groove; two of the two ends of the upper cut-off knife (2) are fixedly connected with the lifting rod (213) through a cross beam (215), and the upper cut-off knife (2) is fixedly connected with the cross beam (215) along the length direction.

3. The automatic cutting machine according to claim 1, wherein the lifting power is provided as a first motor, a power output shaft of the first motor is drivingly connected to a cam shaft (217) through a gear transmission, two cams (211) are fixedly connected to both ends of the cam shaft (217), respectively, and the cam shaft (217) is rotatably fixed to the frame (1).

4. The automatic cutting machine according to claim 2, wherein the size of the lifting rod (213) is in clearance fit with the size of the through groove and an anti-deflection device is provided therebetween; prevent skew device including be used for with splint (216) that the pole wall of lifter (213) offseted, be provided with the confession on fixing base (214) the embedded groove of splint (216) embedding, splint (216) are kept away from one side of lifter (213) is provided with the fixed slot, be provided with in the fixed slot one end with fixing base (214) offset, the other end with the compression spring that splint (216) offset.

5. The automatic cutting machine of claim 2, wherein said lift bar (213) is a unitary structure with said cross member (215).

6. The automatic cutting machine according to claim 1, wherein the cutter assembly further comprises a lower cutter (3) fitted to the frame (1), the lower cutter (3) being positioned below the upper cutter (2) and aligned with the upper cutter (2).

7. The automatic cutting machine according to claim 1, further comprising a feeding device (4) and a controller, wherein the feeding device (4) is located upstream of the upper cutting knife (2), the feeding device (4) comprises a feeding roller (402), a pressing roller (401) and a feeding power in transmission connection with the feeding roller (402), the feeding roller (402) is in transmission connection with the pressing roller (401), the pressing roller (401) and the feeding roller (402) are coaxially arranged and rotatably connected to the frame (1), and the pressing roller (401) is liftably connected to the frame (1) through a second lifting structure (41) to generate a displacement away from or close to the feeding roller (402); the controller with go up and down power reaches feeding power electricity all is connected, be provided with on frame (1) with controller communication connection's setting panel.

8. The automatic cutting machine according to claim 7, wherein the second elevation structure (41) includes a moving shaft (411) and a lifting piece (412), a first end of the lifting piece (412) is rotatably connected to the frame (1), a second end is located below the moving shaft (411) and supports the moving shaft (411), and the pressing roller (401) has a tubular shape and is rotatably fitted over the moving shaft (411).

9. The automatic cutting machine according to claim 8, wherein the second lifting structure (41) further comprises a sliding rod (413) and a compression spring, the frame (1) comprises a top plate (102) located above the material placing table (101), one end of the sliding rod (413) is fixedly connected with the moving shaft (411), the other end of the sliding rod penetrates through the top plate (102) to the position above the top plate (102), a through hole for the sliding displacement of the sliding rod (413) is formed in the top plate (102), and the compression spring is sleeved on the sliding rod (413) and located between the moving shaft (411) and the top plate (102).

10. The automatic cutting machine according to claim 7, characterized in that the feeding power is provided as a second motor, the second motor is electrically connected with a two-way switch for controlling the forward rotation and the reverse rotation of the second motor, a power output shaft of the second motor is in transmission connection with a transition gear (404) through belt transmission and is provided with a tension wheel (405) for tensioning a belt, the tension wheel (405) is connected with the frame (1) and is provided with a displacement adjusting structure, the transition gear (404) is in transmission connection with a gear of the feeding roller (402), and the feeding roller (402) is in transmission connection with a gear of the compression roller (401).