CN103010806A - Slitting machine - Google Patents

Abstract

The slitting machine comprises a machine base, a machine frame arranged on the machine base, a feeding part and a rolling part, wherein the feeding part and the rolling part are arranged on the machine frame; the coiling part comprises at least two groups of coiling mechanisms, each group of coiling mechanism at least comprises a first coiling shaft and a second coiling shaft, and two ends of each coiling shaft are respectively and detachably fixed on the non-stop switching mechanism; a driving mechanism for driving the first winding shaft or the second winding shaft to rotate is arranged on one side of the non-stop switching mechanism; the non-stop switching mechanism is also connected with a switching device so as to switch the driving mechanism to drive the first winding shaft or the second winding shaft to rotate. The slitting machine provided by the invention changes the simultaneous rotation of the winding shafts on the existing slitting machine from bidirectional simultaneous rotation into unidirectional rotation, and the first winding shaft and the second winding shaft are simultaneously arranged on the winding mechanism, so that an adhesive tape can be wound and the winding shafts can be replaced alternately, and the working efficiency is improved.

Description

a slitting machine

technical field

The invention relates to the field of machinery, in particular to a slitting machine for slitting soft films such as films and adhesive tapes.

Background technique

The slitting machine is a kind of equipment that cuts the wide roll material longitudinally when rewinding the required specifications through the slitting knife, such as cutting the whole roll of tape raw material into small rolls of finished products. The transmission gear on the existing belt slitting machine for adhesive tape is a two-way transmission, that is, one driving wheel drives two driven wheels to rotate at the same time; this structure makes the existing slitting machine only stop to replace the take-up shaft during slitting. In addition, the slitting machine in the prior art uses two kinds of equipment when making ordinary adhesive tape and ultra-transparent adhesive tape, which increases investment cost and manufacturing cost.

Contents of the invention

The invention proposes a slitting machine, which solves the problem in the prior art that the machine cannot be shut down to replace the coiling shaft.

Technical scheme of the present invention is realized like this:

A slitting machine, comprising a machine base, a frame fixed on both sides of the machine base, and a feeding part and a coil material part arranged on the frame; the coil material part includes at least two groups of coiling mechanisms Each set of winding mechanisms includes at least a first winding shaft and a second winding shaft, the two ends of the first winding shaft and the second winding shaft are respectively detachably fixed on the non-stop conversion mechanism, and the non-stop The stop switching mechanism is respectively fixed on the frame; one side of the non-stop switching mechanism is provided with a first transmission mechanism that drives the first winding shaft or the second winding shaft to rotate; the non-stop switching mechanism is also A switching device is connected to switch the first transmission mechanism to drive the first winding shaft or the second winding shaft to rotate.

Preferably, the non-stop conversion mechanism is provided with a first gear and a second gear inside, the first gear is sleeved on the first winding shaft connector, and the second gear is sleeved on the second winding shaft connector The two ends of the first rewinding shaft are respectively connected to the first rewinding shaft connector, and the two ends of the second rewinding shaft are respectively connected to the second rewinding shaft connector; the first transmission The mechanism drives the first winding shaft or the second winding shaft to rotate through the first gear or the second gear.

Preferably, the first transmission mechanism includes a first drive motor, and the first drive motor drives the fourth gear to rotate through the third gear; the fourth gear meshes with the first gear or the second gear, so that Push the first winding shaft or the second winding shaft to rotate.

Preferably, the first transmission mechanism further includes a fifth gear, a connecting plate and a positioning cylinder, the connecting plate fixes the third gear, the fourth gear and the fifth gear on the same plane; the positioning cylinder pushes the the fifth gear, and press the fifth gear on the first gear or the second gear.

Preferably, the switching device includes a second transmission mechanism and a second drive motor for driving the second transmission mechanism, a rotating shaft is arranged on the outside of the non-stop switching mechanism, and the second transmission mechanism is connected to the rotating shaft Swivel connection.

Preferably, the second transmission mechanism includes a deceleration mechanism and a triangular transmission mechanism, the second drive motor is connected to the deceleration mechanism, the deceleration mechanism is connected to one end of the triangular transmission mechanism, and the triangular rotation mechanism The other two ends are respectively sleeved on the rotating shaft; after the second driving motor is decelerated by the speed reduction mechanism, it drives the triangular transmission mechanism to rotate, and the triangular rotating mechanism drives the rotating shaft to rotate by 180°.

Preferably, the roll material part includes two sets of winding mechanisms, the first winding shaft and the second winding shaft in each set of winding mechanisms have the same structure, and the position of winding the film on one set of winding mechanisms Corresponding to the unrolled film position on another group of take-up mechanisms.

Preferably, the slitting machine further includes an ultra-transparent device, the ultra-transparent device includes a third drive cylinder, a third transmission mechanism and a pinch wheel, and the third drive cylinder drives the third transmission mechanism around its rotation axis Rotate, so that the pressure wheel is pressed on the first winding shaft or the second winding shaft; the third driving cylinder is fixed on the frame.

Preferably, the rotating shaft is parallel to the first winding shaft and the second winding shaft, and its two ends are respectively fixed on the frame; the two ends of the rotating shaft are respectively covered with a rotating plate; the machine A connecting rod is also arranged between the rotating plates at both ends of the frame, and the third driving cylinder is connected to one end of the connecting rod, and drives the rotating plate to rotate around the rotating shaft through the connecting rod, so that the press rollers press on said first reel or second reel.

Preferably, the feeding part includes a fourth driving motor, the fourth driving motor drives the fourth transmission mechanism to rotate and feed materials, and the fourth transmission mechanism is arranged outside the frame.

Preferably, the fourth transmission mechanism is a chain transmission.

The slitting machine of the present invention changes the rewinding shaft on the existing slitting machine from two-way simultaneous rotation to one-way rotation, and a first rewinding shaft and a second rewinding shaft are arranged on the winding mechanism at the same time, which can alternately reel the tape and Replacing the take-up shaft improves work efficiency. Moreover, the slitting machine of the present invention can also be equipped with a super-transparent device, which can roll ordinary adhesive tapes and ultra-transparent adhesive tapes, and combine the existing ordinary slitting machines and ultra-transparent slitting machines into one, saving investment and manufacturing costs.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the overall structure schematic diagram of the preferred embodiment of the slitting machine of the present invention;

Fig. 2 is a partial schematic diagram of the first transmission mechanism of the preferred embodiment of the slitting machine of the present invention;

Fig. 3 is a partial schematic view of the ultra-transparent device of the preferred embodiment of the slitting machine of the present invention;

Fig. 4 is the schematic diagram of the driving structure of the preferred embodiment of the slitting machine of the present invention;

Fig. 5 is a perspective view of a non-stop switching mechanism of a preferred embodiment of the slitting machine of the present invention;

Explanation of symbols: base 1, frame 2, transmission shaft 1 31, transmission shaft 2 32, transmission shaft 3 33, transmission shaft 4 34, transmission shaft 5 35, transmission shaft 6 36, positioning hole 37, first rewinding shaft 41 , the second winding shaft 42, the non-stop conversion mechanism 43, the first winding shaft connector 431, the second winding shaft connector 432, the first gear 433, the second gear 434, the switching device 435, the rotating shaft 436, the third gear 51, the fourth gear 52, the fifth gear 53, the connecting plate 54, the positioning cylinder 55, the third driving cylinder 61, the third transmission mechanism 62, the rotating plate 621, the rotating shaft 622, the connecting rod 623, the pressing wheel 63, the second Drive motor 71, deceleration mechanism 72, triangular transmission mechanism 73.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The structure of the preferred embodiment of the slitting machine of the present invention is shown in Figures 1-5, a frame 2 is fixed on the base 1, and a feeding part and a coil part are arranged on the frame 2. In order to achieve a better stabilizing effect, the frame 2 is symmetrically divided into two parts, which are respectively arranged on both sides of the frame 1 , and the feeding part and the coil part are erected between the frames 2 . As shown in Fig. 1 and Fig. 2, the coiling part of the present invention includes two groups of winding mechanisms, that is, an upper winding mechanism and a lower winding mechanism, and the coiling is carried out at the same time, and each group of winding mechanisms includes a first winding shaft 41 and the second winding shaft 42 two winding shafts, the two ends of the first winding shaft 41 and the second winding shaft 42 are detachably fixed on the non-stop conversion mechanism 43 respectively. One side of the non-stop switching mechanism 43 is provided with a first transmission mechanism that drives the first winding shaft 41 or the second winding shaft 42 to rotate; a switching device 435 is also connected to the non-stop switching mechanism 43 to switch the first winding shaft 41 or the second winding shaft 42; A transmission mechanism drives the first winding shaft 41 or the second winding shaft 42 to rotate.

The whole roll of raw material is placed on the lower part of the slitting machine, and is fixed between the frames 2 through the positioning holes 31. When slitting, the raw material passes through the guiding, feeding, slitting and winding mechanism to roll the slitting tape or film on the upper winding mechanism and the lower winding mechanism respectively. The two-axis transmission gears of the first winding shaft 41 and the second winding shaft 42 of the existing upper winding mechanism and the lower winding mechanism are arranged in the middle of the two shafts in the non-stop conversion mechanism 43, and the intermediate gears are used to drive the winding shafts on both sides. The gears move in opposite directions, and the winding shaft gear drives the first winding shaft 41 and the second winding shaft 42 to move simultaneously. When the adhesive tape rolled on the first winding shaft 41 or the second winding shaft 42 reaches the set value, stop the machine and start labeling for the second time. After the automatic exchange, manually cut the cloth and stop the machine to load and unload the first winding shaft 41 and the second winding shaft 42. . After stopping the machine to load and unload the reel, move the reel to the tube threading machine, put the paper tube at the set position, and then return to install the reel. This process takes too long, which affects work efficiency exponentially, and it is also very labor-intensive to work in such a cycle.

And the coiling mechanism of each group of the present invention comprises an upper winding mechanism and a lower winding mechanism, and each winding mechanism comprises a first winding shaft 41 and a second winding shaft 42, and the two winding shafts utilize a one-way gear transmission to perform winding. roll movement. When the tape rolled on the rewinding shaft reaches the set value, stop the machine and start labeling for the second time, cut the cloth after automatic exchange, the cloth can be cut manually or automatically according to the actual situation; after automatic exchange, load tape, tape Or the finished winding shaft of the film is just in the stop position, and the other working winding shaft can be started manually or automatically. The operator performs loading and unloading when the coiling mechanism is in a static state. After the loading and unloading is completed, the other coiling shaft is also coiled and can be exchanged for loading and unloading. The first winding shaft 41 and the second winding shaft 42 of the present invention can alternately perform the work of winding up the tape and replacing the winding shaft, which doubles the work efficiency and reduces the work intensity.

When the first winding shaft 41 and the adhesive tape, film and other materials on the winding shaft of another group of winding mechanisms matched with it are wound up to the set value, the switching device 435 is switched so that the first winding shaft 41 is no longer It is connected with the first transmission mechanism, so that the second winding shaft 42 is connected with the first transmission mechanism; at this time, the first winding shaft 41 stops and the step of replacing the winding shaft can be carried out, and at the same time, the second winding shaft 42 Instead of the first winding shaft 41 to continue winding, the purpose of changing the winding shaft without stopping the machine is achieved.

As shown in Figures 1-3, the non-stop conversion mechanism 43 of the present invention is provided with a first gear 433 and a second gear 434 inside, the first gear 433 is set on the first winding shaft connector 431, and the second gear 434 is set on the second rewinding shaft connector 432; both ends of the first rewinding shaft 41 are respectively connected to the first rewinding shaft connector 431, and both ends of the second rewinding shaft 42 are respectively connected to the second rewinding shaft connector 432; The first transmission mechanism drives the first winding shaft 41 or the second winding shaft 42 to rotate through the first gear 433 or the second gear 434 . The first transmission mechanism includes a first drive motor, and the first drive motor drives the fourth gear 52 to rotate through the third gear 51; the fourth gear 52 meshes with the first gear 433 or the second gear 434 to promote the first A winding shaft 41 or a second winding shaft 42 rotates.

Since the movement processes of the two groups of winding mechanisms are the same, only one group of winding mechanisms is used to describe the specific process of changing the winding shaft without stopping the machine: as shown in Figure 2 and Figure 3, when the first drive motor rotates, Drive the third gear 51 to rotate, the third gear 51 drives the fourth gear 52 meshed with it to rotate, the fourth gear 52 meshes with the first gear 433 again, so the first gear 433 rotates, and simultaneously drives the first winding shaft connector 431 and The first winding shaft 41 rotates, so that the coiled material is wound on the first winding shaft 41 to achieve the purpose of coiling the material.

As shown in the figure, the first transmission mechanism also includes a fifth gear 53, a connecting plate 54 and a positioning cylinder 55, and the connecting plate 54 fixes the third gear 51, the fourth gear 52 and the fifth gear 53 on the same plane The positioning cylinder 55 pushes the fifth gear 53, and makes the fifth gear 53 press on the first gear 433, so that the whole non-stop conversion mechanism 43 is not allowed to swing, and plays a positioning role.

The first winding shaft 41 on the non-stop switching mechanism 43 and the winding shaft gears of the second winding shaft 42, i.e. the first gear 433 and the second gear 434, and the fourth gear 52 under the action of the positioning cylinder 55 make the auxiliary The transmission gear, i.e. the fifth gear 53, fits with it to roll the material. When the first winding shaft 41 is winding, the second winding shaft 42 is in a separated state; otherwise, the first winding shaft 41 is in a separated state and will not roll. That is, the shutdown state.

In Fig. 4 and Fig. 5, the switching device 435 includes a second transmission mechanism and a second driving motor 71 for driving the second transmission mechanism, and a rotating shaft 436 is arranged outside the non-stop switching mechanism 43, and the second transmission mechanism The mechanism is rotatably connected to the rotary shaft 436 . In this preferred embodiment, the second transmission mechanism includes a deceleration mechanism 72 and a triangular transmission mechanism 73, the second driving motor 71 is connected with the deceleration mechanism 72, and the deceleration mechanism 72 is connected with one end of the triangular transmission mechanism 73, and the triangular rotation mechanism The other two ends of 73 are sleeved on the rotating shaft 436 respectively. After the second driving motor 71 is decelerated by the deceleration mechanism 72, it drives the triangle transmission mechanism 72 to rotate, and the triangle rotation mechanism 72 drives the rotation shaft 436 to rotate 180°, and the rotation of the rotation shaft 436 makes the non-stop conversion mechanism 43 rotate 180°, reaching The purpose of exchanging positions between the first winding shaft 41 and the second winding shaft 42 . Figure 4 and Figure 5 deceleration mechanism 72, the connection of deceleration mechanism 72 and triangular transmission mechanism 73, and the second driving motor 71, transmission shaft one 31 and the transmission relationship of other structures are originally covered, but for convenience to describe the transmission The process is shown in solid lines in the figure.

The present invention can also include more than two sets of winding mechanisms, that is, the entire roll of raw materials is wound on three or more winding shafts at the same time. However, from the perspective of convenient processing and actual conditions, generally two or three or four sets of coiling mechanisms can be set. The present invention is provided with two groups of winding mechanisms, the first winding shaft 41 and the second winding shaft 42 in each group of winding mechanisms have the same structure, and the position of winding film on one group of winding mechanisms is the same as that of the other group of winding mechanisms. Corresponds to the unwound film position on the take-up mechanism. For example, if the width of the raw material is 1300mm, when it is divided into small rolls with a width of 50mm, it can be divided into 26 rolls, and the number allocated to the upper winding mechanism and the lower winding mechanism is 13 rolls; the gap between the 13 rolls is also just right. 50mm, this gap value is the same as the width value of the small roll.

In a preferred embodiment of the present invention, the non-stop switching mechanism 43 in each group of winding mechanisms is connected with a first winding shaft 41 and a second winding shaft 42, and the first winding shaft 41 and the second winding shaft 42 have the same structure . Certainly also can be provided with three or more than three rewinding shafts on non-stop switching mechanism 43, when one of them rewinding shaft rotates, other two rewinding shafts can be replaced, can prolong the time of changing rewinding shafts. The number of concrete winding shafts can be selected according to specific conditions, but all belong to the technical scope of the present invention.

The slitting machine of the present invention is also provided with an ultra-transparent device, and its structure is as shown in Figure 4. The ultra-transparent device includes a third driving cylinder 61, a third transmission mechanism 62 and a pinch wheel 63, wherein the third driving cylinder 61 drives The third transmission mechanism 62 rotates around its rotating shaft 622, so that the pressure wheel 63 is pressed on the first winding shaft 41 or the second winding shaft 42; the third driving cylinder 61 is fixed on the frame 2 superior. The pressure roller 63 makes the material to be rolled close to the surface layer of the product on the reel when the reel is rewound, so as to drive away the air bubbles and squeeze out the air bubbles between the tape or film to achieve a super-transparent effect.

In order to balance the pressure of the pressure roller 63 on the winding shaft, the specific structure of the ultra-transparent device in the preferred embodiment of the present invention is as follows: the rotating shaft 622 is parallel to the first winding shaft 41 and the second winding shaft 42, and its two ends are respectively fixed on the on the frame 2, and penetrate from one side of the support 2 to the other side. The two ends of the rotating shaft 622 are respectively covered with a rotatable rotating plate 621, and a connecting rod 623 is also arranged between the rotating plates 621 at the two ends of the frame 2, and the third driving cylinder 61 is connected to one end of the connecting rod 623. , and drive the rotating plate 621 to rotate around the rotating shaft 622 through the connecting rod 623, so that the pressure wheel 63 is in close contact with the tape wound on the first winding shaft 41 or the second winding shaft 42, and reaches a certain pressure value. It is advisable that the pressure value should not hinder the normal rotation of the take-up shaft while achieving the ultra-transparent effect.

As shown in Figures 1 and 5, the feeding part includes a fourth drive motor, the fourth drive motor drives the fourth transmission mechanism to rotate the material, and the fourth transmission mechanism is arranged on the frame 2 outside. The specific transmission structure of the feeding part is as shown in Figure 4: the fourth drive motor is arranged on the inside of the frame 2 shown in the figure, and the power is output to the transmission shaft one 31 through the positioning hole 37, and the transmission shaft one 31 passes through a belt or a chain Drive transmission shaft two 32 to rotate, transmission shaft two 32 drives transmission shaft three 33 to rotate by belt or chain again, transmission shaft three 33 drives transmission shaft four 34 to rotate by belt or chain again, transmission shaft four 34 drives by belt or chain again Power transmission shaft five 35 rotates. The transmission shaft six 36 is arranged between the transmission shaft four 34 and the transmission shaft five 35, and is mainly used to drive the waste shaft embossing wheel to rotate. In this preferred embodiment, synchronous belt or chain transmission is adopted between the transmission shafts. Compared with belt transmission, the chain transmission will not slip, the transmission ratio is accurate, the efficiency is high, and the size of the transmission parts is small.

In order to adjust the winding speed conveniently, the slitting machine also includes a speed regulation module for adjusting the winding speed. The module can adjust the driving current of the driving motor through the circuit to change the rotation speed of the output shaft of the driving motor. The driving devices such as the positioning cylinder 55 and the third driving cylinder 61 in the present invention can also use motors for transmission and positioning, and are not limited to the cylinder transmission in the preferred embodiment of the present invention.

The slitting machine of the present invention is changed from central gear transmission to double gear reversing one-way occlusal transmission. In application, the working efficiency of the existing slitting machine is more than four times higher than that of the conventional machine, and the non-stop device winding shaft can be realized compared with the conventional machine, which greatly reduces the requirements for operating skills; the invention also has the function of super transparent tape Optional functions reduce investment costs.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. A slitting machine comprising a frame (1), a frame (2) fixed on both sides of the frame (1), and a feeding part and a coil material arranged on the frame (2) Part; it is characterized in that, the roll material part includes at least two groups of winding mechanisms, and each group of winding mechanisms includes at least a first winding shaft (41) and a second winding shaft (42), and the first winding The two ends of the reel (41) and the second winding shaft (42) are respectively detachably fixed on the non-stop conversion mechanism (43), and the non-stop conversion mechanism (43) is respectively fixed on the frame (2) One side of the non-stop conversion mechanism (43) is provided with a first transmission mechanism that drives the first winding shaft (41) or the second winding shaft (42) to rotate; the non-stop conversion mechanism (43) A switching device (435) is also connected to switch the first transmission mechanism to drive the first winding shaft (41) or the second winding shaft (42) to rotate. 2. The slitting machine according to claim 1, wherein a first gear (433) and a second gear (434) are arranged inside the non-stop switching mechanism (43), and the first gear ( 433) is sleeved on the first winding shaft connector (431), and the second gear (434) is sleeved on the second winding shaft connector (432); the two ends of the first winding shaft (41) are respectively connected On the first rewinding shaft connector (431), the two ends of the second rewinding shaft (42) are respectively connected to the second rewinding shaft connector (432); the first transmission mechanism passes through the The first gear (433) or the second gear (434) drives the first winding shaft (41) or the second winding shaft (42) to rotate. 3. The slitting machine according to claim 2, wherein the first transmission mechanism comprises a first drive motor, and the first drive motor drives the fourth gear (52) to rotate through the third gear (51) ; The fourth gear (52) meshes with the first gear (433) or the second gear (434) to push the first winding shaft (41) or the second winding shaft (42) to rotate. 4. The slitting machine according to claim 3, characterized in that, the first transmission mechanism also includes a fifth gear (53), a connecting plate (54) and a positioning cylinder (55), and the connecting plate (54 ) fix the third gear (51), the fourth gear (52) and the fifth gear (53) on the same plane; the positioning cylinder (55) pushes the fifth gear (53), and makes the The fifth gear (53) is pressed on the first gear (433) or the second gear (434). 5. The slitting machine according to claim 1, characterized in that, the switching device (435) comprises a second transmission mechanism and a second drive motor (71) that drives the second transmission mechanism, and the non-stop A rotating shaft (436) is arranged on the outside of the conversion mechanism (43), and the second transmission mechanism is connected in rotation with the rotating shaft (436). 6. The slitting machine according to claim 5, characterized in that, the second transmission mechanism comprises a speed reduction mechanism (72) and a triangular transmission mechanism (73), and the second drive motor (71) is connected to the speed reduction mechanism. mechanism (72), the deceleration mechanism (72) is connected to one end of the triangular transmission mechanism (73), and the other two ends of the triangular rotation mechanism (73) are respectively sleeved on the rotating shaft (436); After the second drive motor (71) is decelerated by the reduction mechanism (72), it drives the triangle transmission mechanism (73) to rotate, and the triangle rotation mechanism (73) drives the rotation shaft (436) to rotate for 180° . . 7. The slitting machine according to claim 1, wherein the coiled material part comprises two groups of winding mechanisms, and the first winding shaft (41) and the second winding shaft in each group of winding mechanisms The structure of (42) is the same, and the position of film winding on one group of winding mechanism corresponds to the position of unwinding film on the other group of winding mechanism. 8. The slitting machine as claimed in claim 1, characterized in that, the slitting machine also comprises an over-permeable device, and the over-permeable device comprises a third driving cylinder (61), a third transmission mechanism (62) and Pressing wheel (63), the third driving cylinder (61) drives the third transmission mechanism (62) to rotate around its rotation axis (622), so that the pressing wheel (63) is pressed against the first retracting on the reel (41) or the second rewinding reel (42); the third drive cylinder (61) is fixed on the frame (2). 9. The slitting machine according to claim 8, characterized in that, the rotating shaft (622) is parallel to the first winding shaft (41) and the second winding shaft (42), and its two ends are respectively fixed On the frame (2); a rotating plate (621) is set at both ends of the rotating shaft (622); a connecting rod is also arranged between the rotating plates (621) at both ends of the frame (2) (623), the third driving cylinder (61) is connected to one end of the connecting rod (623), and drives the rotating plate (621) to rotate around the rotating shaft (622) through the connecting rod (623), The pressure roller (63) is pressed against the first winding shaft (41) or the second winding shaft (42). 10. The slitting machine according to claim 1, wherein the feeding part comprises a fourth driving motor, the fourth driving motor drives the fourth transmission mechanism to rotate the feeding, and the fourth transmission mechanism It is arranged on the outside of the frame (2); the fourth transmission mechanism is a chain transmission.

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