CN218476770U - Cutting equipment of honeycomb cardboard - Google Patents

Abstract

The application relates to cutting equipment of a honeycomb paperboard, which comprises a machine table, wherein a first sliding part and a first driving part are arranged on the machine table, the first sliding part is in sliding fit with the machine table, and the first driving part is used for driving the first sliding part to slide; the first driving piece comprises a driving roller, a driven roller, a conveying belt and a first motor; the driving roller and the driven roller are rotationally arranged on the machine table, the conveying belt is arranged between the driving roller and the driven roller in a surrounding mode, and the conveying belt is fixedly connected with the first sliding piece; the first motor is fixed on the machine table, and an output shaft of the first motor is fixedly connected with the end part of the driving roller; the first sliding part is provided with a second sliding part and a second driving part, the second sliding part is in sliding fit with the first sliding part, and the second driving part is used for driving the second sliding part to slide; the second sliding piece is provided with a cutting knife and a third driving piece in a rotating mode, the cutting knife is connected with the second sliding piece in a rotating mode, and the third driving piece is used for driving the cutting knife to rotate. This application has promoted the cutting efficiency of cutting equipment to the cardboard.

Description

Cutting equipment for honeycomb paperboard

technical field

The present application relates to the field of cardboard cutting equipment, in particular to a honeycomb cardboard cutting equipment.

Background technique

Honeycomb paperboard includes honeycomb core paper and face paper attached to both sides of the core paper. In the process of processing the honeycomb paperboard, in order to meet the size of the honeycomb paperboard, it is generally necessary to cut the strip-shaped honeycomb paper to process a board-shaped honeycomb paperboard.

A kind of forming equipment of honeycomb paperboard is disclosed in the related art, which includes a baking device, a cross-cutting device and a discharging device. The cross-cutting device is located between the baking device and the discharging device. Cross-cutting device, the cross-cutting device cuts the cardboard and sends it to the discharge device, and the discharge device continues to convey the cut cardboard forward, and the staff collects the cut cardboard at the end of the discharge device. The cross-cutting device includes a machine table and a cross-cutting mechanism arranged on the machine table. The cross-cutting mechanism includes a sliding frame, which slides along the width direction of the machine table. A cutting knife is rotated on the sliding frame, and the sliding frame Drive the cutting knife to slide along the width direction of the machine, so as to realize the cutting of the edge of the cardboard.

During the long-term observation, the staff found the following defects: Since the sliding frame can only slide along the width direction of the machine table and cannot slide along the conveying direction of the cardboard, the cross-cutting mechanism can only stop when cutting the cardboard. The transmission of the cardboard reduces the processing efficiency of the forming equipment for the cardboard.

Utility model content

In order to improve the cutting efficiency of the cardboard by the cutting device, the present application provides a cutting device for the honeycomb cardboard.

A cutting device for honeycomb paperboard provided by the application adopts the following technical scheme:

A cutting device for honeycomb paperboard, comprising a machine table, a first sliding member and a first driving member are arranged on the machine table, the first sliding member slides and cooperates with the machine table, and the first A driving member is used to drive the first sliding member to slide along the first direction;

The first driving member includes a driving roller, a driven roller, a conveyor belt and a first motor; the driving roller and the driven roller are both rotatably arranged on the machine table, and the conveyor belt is arranged around the driving roller Between the driven roller, the conveyor belt is fixedly connected to the first sliding member; the first motor is fixed on the machine table, and the output shaft of the first motor is connected to the driving roller Fixed connection at the end;

The first sliding member is provided with a second sliding member and a second driving member, the second sliding member is slidingly matched with the first sliding member, and the second driving member is used to drive the The second sliding member slides along the second direction; a cutting knife and a third driving member are rotated on the second sliding member, and the cutting knife is rotatably connected with the second sliding member, and the The third driving member is used to drive the cutting knife to rotate.

By adopting the above technical solution, the baking device bakes the honeycomb paperboard and then transfers it to the cutting device, and drives the driving roller to rotate through the first motor. The driving roller drives the conveyor belt to rotate during the rotation, and the conveyor belt drives the honeycomb paperboard during the rotation. Continue to move forward, while the conveyor belt drives the first sliding part and the honeycomb paperboard to keep moving forward synchronously; at the same time, the second driving part drives the second sliding part to slide along the second direction, and the second sliding part drives the cutting knife along the second sliding in the same direction; at the same time, the cutting knife is driven to rotate by the third driving member, and the cutting knife cuts the strip-shaped honeycomb paper into a board-shaped honeycomb paperboard during the process of relative sliding between the cutting knife and the honeycomb paperboard, and then cuts the cut The honeycomb cardboard is sent to the discharge device; compared with the background technology, the cross-cutting device of the present application can also send the honeycomb cardboard forward simultaneously during the process of cutting the cardboard, thereby increasing the processing efficiency of the forming equipment for the honeycomb cardboard; when cutting After the cutting is completed, the first driving mechanism drives the first sliding frame to slide to the original position, so as to facilitate the next cutting.

Optionally, the second sliding member includes a sliding block and a driving block, the sliding block is fixedly connected to the driving block, a sliding groove is opened on the first sliding member, and the sliding The groove extends along the second direction, the sliding block is slidingly fitted with the sliding groove, the lower surface of the driving block abuts against the upper surface of the first sliding member, and the second driving member uses to drive the driving block to slide along the second direction.

By adopting the above-mentioned technical scheme, when the second driving member drives the driving block to slide in the second direction, the driving block drives the sliding block to slide in the sliding groove, and the sliding groove has a guiding effect on the sliding block; at the same time, due to the driving The lower surface of the block abuts against the upper surface of the first sliding part, so both the sliding groove and the first sliding part have a guiding effect on the second sliding part, thereby increasing the sliding of the second sliding part in the second direction stability.

Optionally, the second driving member includes a screw rod, a bearing member, a second motor and two support blocks, both of the support blocks are fixed on the first sliding member, and the two support blocks of the screw rod The ends are rotatably connected with the two supporting blocks respectively; the screw rod passes through the driving block, and the screw rod is threadedly matched with the driving block; the bearing member is fixed on the first sliding member, The second motor is fixed on the bearing member, and the output shaft of the second motor is fixedly connected to the end of the screw rod.

By adopting the above technical solution, the two support blocks have a bearing effect on the screw rod, and the screw rod is driven to rotate by the second motor, and the screw rod drives the drive block to slide along the second direction during the rotation process, and at the same time, the two support blocks also support the drive The block has a limit function, thereby limiting the sliding stroke of the driving block.

Optionally, a fixing part is fixedly arranged on the support block, and a bolt is pierced through the fixing part, and the bolt is threadedly engaged with the first sliding part.

By adopting the above technical solution, the nut of the bolt and the first sliding part have a clamping effect on the fixing part, thereby fixing the fixing part on the first sliding part, and then fixing the support block on the first sliding part, It increases the convenience for the staff to install and remove the support block.

Optionally, the bearing member includes a bearing block and an adjusting block, and the bearing block is fixedly connected with the adjusting block; an adjusting groove is opened on the adjusting block, and a bolt is pierced in the adjusting groove, and the bolt It is threadedly matched with the first sliding member; the second motor is fixed on the bearing block.

By adopting the above technical solution, the nut of the bolt and the first sliding part have a clamping effect on the adjusting block, thereby fixing the adjusting block on the first sliding part, and further fixing the bearing block on the first sliding part, The convenience for the staff to install and disassemble the bearing part is increased; at the same time, the bearing block has a stable supporting effect on the second motor.

Optionally, the adjustment slot extends vertically.

By adopting the above technical solution, it is convenient for the staff to adjust the position of the bearing member in the vertical direction, thereby adjusting the position of the second motor in the vertical direction, thereby ensuring that the output shaft of the second motor remains coaxial with the output shaft of the screw rod.

Optionally, the bearing member further includes a reinforcement block, one side of the reinforcement block is fixedly connected to the adjustment block, and the other side of the reinforcement block is fixedly connected to the bearing block.

By adopting the above technical solution, the reinforcing block connects the adjusting block and the bearing block together, on the one hand, the bearing block is not easily deformed, so that the bearing is not easily deformed, and the overall structural strength of the bearing is increased.

Optionally, the third driving member includes a first bevel gear, a second bevel gear, a third motor and a rotating rod; one end of the rotating rod is fixedly connected to the cutting knife, and the other end of the rotating rod passing through the sliding block and rotatingly connected with the sliding block; the third motor is fixed on the driving block, and the first bevel gear is sleeved on the output shaft of the third motor and connected with The output shaft of the third motor is fixedly connected, the second bevel gear is sheathed on the rotating rod and fixedly connected with the rotating rod, and the first bevel gear and the second bevel gear mesh with each other.

By adopting the above technical solution, the third motor drives the first bevel gear wheel to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the rotating rod to rotate, and the rotating rod drives the cutting knife to rotate, thereby realizing the honeycomb paperboard to crop.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The baking device bakes the honeycomb cardboard and sends it to the cutting device. The first motor drives the driving roller to rotate. The driving roller drives the conveyor belt to rotate during the rotation, and the conveyor belt drives the honeycomb cardboard to continue to move forward during the rotation. At the same time The conveyor belt drives the first sliding part and the honeycomb paperboard to keep moving forward synchronously; at the same time, the second driving part drives the second sliding part to slide along the second direction, and the second sliding part drives the cutting knife to slide along the second direction; at the same time The cutting knife is driven to rotate by the third driving member, and the cutting knife cuts the strip-shaped honeycomb paper into board-shaped honeycomb paperboard during the process of relative sliding between the cutting knife and the honeycomb paperboard, and then sends the cut honeycomb paperboard to Discharging device; Compared with the background technology, the cross-cutting device of the present application can also transmit the honeycomb cardboard forward at the same time during the process of cutting the cardboard, thereby increasing the processing efficiency of the forming equipment for the honeycomb cardboard; when the cutting is completed, The first driving mechanism drives the first sliding frame to slide to the original position, which is convenient for the next cutting;

2. When the second driving member drives the driving block to slide in the second direction, the driving block drives the sliding block to slide in the sliding groove, and the sliding groove has a guiding effect on the sliding block; at the same time, due to the lower surface of the driving block abut against the upper surface of the first sliding member, so both the sliding groove and the first sliding member have a guiding effect on the second sliding member, thereby increasing the stability of the second sliding member sliding in the second direction;

3. The two support blocks have a load bearing effect on the screw rod. The second motor drives the screw rod to rotate, and the screw rod drives the drive block to slide along the second direction during the rotation process. At the same time, the two support blocks also have a limiting effect on the drive block. , thereby limiting the sliding stroke of the drive block.

Description of drawings

Fig. 1 is a schematic structural diagram of a cutting device for honeycomb paperboard in an embodiment of the present application.

Fig. 2 is a partially enlarged view of part A in Fig. 1 .

Fig. 3 is a partially enlarged view of part B in Fig. 1 .

Explanation of reference signs:

1. Machine platform; 11. First guide rail; 2. First sliding member; 21. Sliding groove; 3. First driving member; 31. Driving roller; 32. Driven roller; 33. Conveyor belt; 34. Second 1. motor; 4. second sliding member; 41. sliding block; 42. driving block; 5. second driving member; 51. screw rod; 52. bearing member; 521. bearing block; , reinforcement block; 524, adjustment groove; 53, second motor; 54, support block; 55, fixed part; 6, cutting knife; 7, third drive member; 71, first bevel gear; 72, second cone Gear; 73, the third motor; 74, the rotating rod.

Detailed ways

The present application will be described in further detail below in conjunction with accompanying drawings 1-3.

For ease of understanding, in the horizontal direction in this embodiment, the conveying direction of the honeycomb paperboard is defined as the first direction, and the direction perpendicular to the first direction is defined as the second direction, based on which the honeycomb paperboard is cut. Cutting equipment is explained.

The embodiment of the present application discloses a cutting device for honeycomb paperboard. Referring to Fig. 1 and Fig. 2, the cutting equipment of honeycomb paperboard includes a machine platform 1, and the machine platform 1 extends along a first direction. The upper surface of the machine table 1 is provided with a first sliding member 2 and a first driving member 3, the first sliding member 2 is slidingly matched with the machine table 1, and the first driving member 3 is used to drive the first sliding member 2 along the Swipe in the first direction. The first sliding member 2 is provided with a second sliding member 4 and a second driving member 5, the second sliding member 4 is slidingly matched with the first sliding member 2, and the second driving member 5 is used to drive the second sliding member 5. The moving part 4 slides along the second direction. The second sliding member 4 is rotatably provided with a cutting knife 6 and a third driving member 7 , the cutting knife 6 is rotatably connected with the second sliding member 4 , and the third driving member 7 is used to drive the cutting knife 6 to rotate.

Referring to FIG. 1 , in this embodiment, four bearing seats are fixedly arranged on the upper surface of the machine table 1 , and the four bearing seats are arranged in a rectangular array. The first driving member 3 includes a driving roller 31, a driven roller 32, a conveyor belt 33 and a first motor 34. The driving roller 31 and the driven roller 32 all extend along the second direction. Rotationally connected, the two ends of the driven roller 32 rotate with the other two bearing seats respectively. The conveyor belt 33 is disposed around between the driving roller 31 and the driven roller 32 . The first motor 34 is fixed on the upper surface of the machine table 1 , and the output shaft of the first motor 34 is fixedly connected to the end of the driving roller 31 . The conveyor belt 33 is fixedly connected with the first sliding member 2, and the driving shaft is driven to rotate by the first motor 34, and the driving shaft drives the conveyor belt 33 to rotate during the rotation, and the conveyor belt 33 drives the first sliding member 2 to rotate along the first sliding member 2 during the rotation. Swipe in one direction.

Continuing to refer to FIG. 1 , two first guide rails 11 are fixedly disposed on the upper surface of the machine table 1 , and the two first guide rails 11 both extend along the first direction. The two first guide rails 11 pass through the first sliding member 2 , and the first sliding member 2 is slidingly matched with the two first guide rails 11 . The two first guide rails 11 have a guiding effect on the first sliding member 2, increasing the stability of the first sliding member 2 sliding along the first direction.

Referring to FIG. 1 and FIG. 2 , the second sliding member 4 includes a sliding block 41 and a driving block 42 , the sliding block 41 and the driving block 42 are integrally formed, and the sliding block 41 is located on the lower surface of the driving block 42 . The upper surface of the first sliding member 2 is provided with a through sliding groove 21 , the sliding groove 21 extends along the second direction, and both ends of the sliding groove 21 are closed. The bottom end of the sliding block 41 passes through the sliding groove 21, the sliding block 41 slides and fits with the sliding groove 21, the lower surface of the driving block 42 abuts against the upper surface of the first sliding member 2, and the second driving member 5 is used to drive the driving block 42 to slide along the second direction. During the second driving member 5 driving the driving block 42 to slide in the second direction, the driving block 42 drives the sliding block 41 to slide in the sliding groove 21, and the sliding groove 21 has a guiding effect on the sliding block 41; The lower surface of the driving block 42 abuts against the upper surface of the first sliding member 2, so the sliding groove 21 and the first sliding member 2 both have a guiding effect on the second sliding member 4, thus increasing the second sliding The stability of member 4 sliding along the second direction.

Referring to Fig. 1 and Fig. 3, the second driving member 5 comprises a screw mandrel 51, a bearing member 52, a second motor 53 and two support blocks 54, and the two support blocks 54 are all fixed on the first sliding member 2, and the screw mandrel The two ends of 51 are respectively rotatably connected with two support blocks 54 . The screw rod 51 passes through the driving block 42 , and the screw rod 51 is threadedly engaged with the driving block 42 . The bearing member 52 is fixed on the first sliding member 2 , the second motor 53 is fixed on the bearing member 52 , and the output shaft of the second motor 53 is fixedly connected to the end of the screw rod 51 . The two supporting blocks 54 have a bearing effect on the screw mandrel 51, and the second motor 53 drives the screw mandrel 51 to rotate, and the screw mandrel 51 drives the driving block 42 to slide along the second direction during the rotation, and the two supporting blocks 54 also support the screw mandrel 51. The driving block 42 has a limiting effect, thereby limiting the sliding stroke of the driving block 42 .

Referring to FIG. 3 , the two opposite side walls of each supporting block 54 are integrally formed with fixing portions 55 , and the lower surfaces of the two fixing portions 55 abut against the upper surface of the first sliding member 2 . Bolts are pierced on the two fixing parts 55 , and each bolt is threadedly engaged with the first sliding member 2 . The nut of the bolt and the first sliding part 2 have a clamping effect on the fixing part 55, thereby fixing the fixing part 55 on the first sliding part 2, and then fixing the support block 54 on the first sliding part 2, The convenience for the staff to install and remove the support block 54 is increased.

Continuing to refer to FIG. 3 , the bearing member 52 includes a bearing block 521 and an adjusting block 522 , the bearing block 521 and the adjusting block 522 are integrally formed, and the bearing block 521 and the adjusting block 522 are perpendicular to each other. The adjusting block 522 is fixed on one end of the sliding member, and the second motor 53 is fixed on the upper surface of the bearing block 521 , so as to realize the installation of the second motor 53 .

Continuing to refer to FIG. 3 , the upper surface of the adjusting block 522 is provided with two penetrating adjusting slots 524 , both of which extend vertically, and both ends of each adjusting slot 524 are closed. Bolts are perforated in the two adjustment slots 524 , and the two bolts are threadedly engaged with the first sliding member 2 . The nut of the bolt and the first sliding part 2 have a clamping effect on the adjusting block 522, thereby fixing the adjusting block 522 on the first sliding part 2, and then fixing the bearing block 521 on the first sliding part 2, This increases the convenience for the staff to install and disassemble the bearing part 52, and at the same time facilitates the staff to adjust the position of the bearing part 52 in the vertical direction.

Continuing to refer to FIG. 3 , the bearing member 52 further includes a reinforcement block 523 , the side wall of the reinforcement block 523 is fixedly connected to the adjustment block 522 , the upper surface of the reinforcement block 523 is fixedly connected to the bearing block 521 , and the cross section of the reinforcement block 523 is triangular. The reinforcing block 523 connects the adjusting block 522 and the bearing block 521 together, on the one hand, the bearing block 521 is not easily deformed, so that the bearing member 52 is not easily deformed, thereby increasing the overall structural strength of the bearing member 52 .

Referring to FIG. 2 , the third driving member 7 includes a first bevel gear 71 , a second bevel gear 72 , a third motor 73 and a rotating rod 74 . The rotating rod 74 extends along the first direction, one end of the rotating rod 74 is fixedly connected with the cutting knife 6 , and the other end of the rotating rod 74 passes through the sliding block 41 and is rotatably connected with the sliding block 41 . The third motor 73 is fixed on the end of the driving block 42 away from the cutting knife 6, the first bevel gear 71 is sleeved on the output shaft of the third motor 73 and is fixedly connected with the output shaft of the third motor 73, the second bevel gear 72 The first bevel gear 71 and the second bevel gear 72 are sheathed on the end of the rotating rod 74 away from the cutting knife 6 and fixedly connected with the rotating rod 74 . The third motor 73 drives the first bevel gear 71 to rotate, the first bevel gear 71 drives the second bevel gear 72 to rotate, the second bevel gear 72 drives the rotating rod 74 to rotate, and the rotating rod 74 drives the cutting knife 6 to rotate, thereby realizing Honeycomb cardboard for cutting.

Continuing to refer to FIG. 2 , in the present embodiment, the end of the drive block 42 away from the cutting knife 6 protrudes from the side wall of the first sliding member 2 , while the end of the rotating rod 74 away from the cutting knife 6 protrudes from the first side wall. The side wall of the sliding member 2, because the second bevel gear 72 is sleeved on the end of the rotating rod 74 away from the cutting knife 6, so the second bevel gear 72 will not touch the first sliding member 2 during the rotation, Both the first sliding member 2 and the second bevel gear 72 are protected.

The implementation principle of the above embodiment is as follows: the baking device bakes the honeycomb cardboard and transmits it to the cutting device, drives the driving roller 31 to rotate through the first motor 34, and the driving roller 31 drives the conveyor belt 33 to rotate during the rotation, and the conveyor belt 33 During the rotation process, the honeycomb paperboard is driven to continue to advance, and the conveyor belt 33 drives the first sliding part 2 to keep moving forward synchronously with the honeycomb paperboard; at the same time, the second driving part 5 drives the second sliding part 4 to slide in the second direction, and the second The second sliding part 4 drives the cutting knife 6 to slide along the second direction; at the same time, the third driving part 7 drives the cutting knife 6 to rotate, and the cutting knife 6 slides the long strip in the process of sliding relative to the honeycomb paperboard. The honeycomb paper is cut into board-shaped honeycomb paperboard, and then the cut honeycomb paperboard is sent to the discharge device; compared with the background technology, the cross-cutting device of the present application can also forward the honeycomb paperboard while cutting the paperboard. Cardboard, thereby increasing the processing efficiency of the forming equipment for honeycomb cardboard; when the cutting is completed, the first driving mechanism drives the first sliding frame to slide to the original position, which is convenient for the next cutting.

All of the above are preferred embodiments of the application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made according to the structure, shape, and principle of the application should be covered by the protection scope of the application. Inside.

Claims (8)

1. The utility model provides a cutting equipment of honeycomb cardboard which characterized in that: the device comprises a machine table (1), wherein a first sliding part (2) and a first driving part (3) are arranged on the machine table (1), the first sliding part (2) is in sliding fit with the machine table (1), and the first driving part (3) is used for driving the first sliding part (2) to slide along a first direction;

the first driving part (3) comprises a driving roller (31), a driven roller (32), a conveying belt (33) and a first motor (34); the driving roller (31) and the driven roller (32) are both rotatably arranged on the machine table (1), the conveying belt (33) is arranged between the driving roller (31) and the driven roller (32) in a surrounding manner, and the conveying belt (33) is fixedly connected with the first sliding piece (2); the first motor (34) is fixed on the machine table (1), and an output shaft of the first motor (34) is fixedly connected with the end part of the driving roller (31);

the first sliding part (2) is provided with a second sliding part (4) and a second driving part (5), the second sliding part (4) is in sliding fit with the first sliding part (2), and the second driving part (5) is used for driving the second sliding part (4) to slide along a second direction; the second sliding part (4) is provided with a cutting knife (6) and a third driving part (7) in a rotating mode, the cutting knife (6) is connected with the second sliding part (4) in a rotating mode, and the third driving part (7) is used for driving the cutting knife (6) to rotate.

2. The honeycomb paperboard cutting apparatus of claim 1, wherein: second sliding member (4) are including sliding block (41) and drive block (42), sliding block (41) with drive block (42) fixed connection, sliding groove (21) have been seted up on first sliding member (2), sliding groove (21) extend along the second direction, sliding block (41) with sliding groove (21) cooperation of sliding, the lower surface butt of drive block (42) in the upper surface of first sliding member (2), second driving piece (5) are used for the drive driving block (42) slide along the second direction.

3. The honeycomb paperboard cutting apparatus of claim 2, wherein: the second driving piece (5) comprises a screw rod (51), a bearing piece (52), a second motor (53) and two supporting blocks (54), the two supporting blocks (54) are fixed on the first sliding piece (2), and two ends of the screw rod (51) are respectively in rotating connection with the two supporting blocks (54); the screw rod (51) penetrates through the driving block (42), and the screw rod (51) is in threaded fit with the driving block (42); the bearing piece (52) is fixed on the first sliding piece (2), the second motor (53) is fixed on the bearing piece (52), and an output shaft of the second motor (53) is fixedly connected with the end part of the screw rod (51).

4. The honeycomb paperboard cutting apparatus of claim 3, wherein: the supporting block (54) is fixedly provided with a fixing part (55), a bolt penetrates through the fixing part (55), and the bolt is in threaded fit with the first sliding part (2).

5. The honeycomb paperboard cutting apparatus of claim 3, wherein: the bearing piece (52) comprises a bearing block (521) and an adjusting block (522), and the bearing block (521) is fixedly connected with the adjusting block (522); an adjusting groove (524) is formed in the adjusting block (522), a bolt penetrates through the adjusting groove (524), and the bolt is in threaded fit with the first sliding piece (2); the second motor (53) is fixed on the bearing block (521).

6. The honeycomb paperboard cutting apparatus of claim 5, wherein: the adjustment groove (524) extends in a vertical direction.

7. The honeycomb paperboard cutting apparatus of claim 5, wherein: the bearing piece (52) further comprises a reinforcing block (523), one side of the reinforcing block (523) is fixedly connected with the adjusting block (522), and the other side of the reinforcing block (523) is fixedly connected with the bearing block (521).

8. The honeycomb paperboard cutting apparatus of claim 2, wherein: the third driving part (7) comprises a first bevel gear (71), a second bevel gear (72), a third motor (73) and a rotating rod (74); one end of the rotating rod (74) is fixedly connected with the cutting knife (6), and the other end of the rotating rod (74) penetrates through the sliding block (41) and is rotatably connected with the sliding block (41); the third motor (73) is fixed on the driving block (42), the first bevel gear (71) is sleeved on an output shaft of the third motor (73) and fixedly connected with the output shaft of the third motor (73), the second bevel gear (72) is sleeved on the rotating rod (74) and fixedly connected with the rotating rod (74), and the first bevel gear (71) and the second bevel gear (72) are meshed with each other.

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