Cutting device for musical instrument production

Abstract

The invention belongs to the technical field of musical instrument production, and discloses a cutting device for musical instrument production. Comprising two bases and two opposite blades, and further comprises two fixed wheels and a conveying belt, and rotating rollers are rotationally connected to the two bases. The circulating assembly is arranged, one of the vertical plates and the fixed wheel are driven by the driving assembly to move in the limiting rail, the first connecting column leaves the preparation position and moves in the linear rail, and when the first connecting column enters the position below the lifting plate, the first connecting column can press the lifting plate upwards through the first inclined face; a lifting plate can drive a lifting column to move downwards to enter a linear rail, a fixing wheel corresponding to a first connecting column is matched with compression of a conveying belt to continuously drive one end of a string to move, the string is cut through a cutting assembly after the string moves to a proper length, and the cut end of the string does not droop or fall off; and the string is clamped between the other fixed wheel and the conveyor belt, so that the fixed wheel moves to continuously pull out the string.

Description

Technical Field

[0001] The present invention relates to the technical field of musical instrument production, and more specifically, to a cutting device for musical instrument production. Background Art

[0002] There are many types of musical instruments, such as wind instruments, plucked instruments, string instruments, percussion instruments and keyboard instruments. During the production process of string instruments, the strings of string instruments need to be cut using a special cutting device. When the strings are not cut, they are wound on a special winding drum. When cutting is required, the staff will pull the strings out to an appropriate length and use the cutting device to cut the strings.

[0003] The existing cutting device still requires the staff to manually pull the string out of the winding drum after cutting before the next cutting can be carried out. After the string is pulled out and cut by the staff, one end of the cut string may hang down or be retracted onto the winding drum, and needs to be pulled out again for cutting. The pulling out operation needs to be repeated each time, which is cumbersome and leads to low cutting efficiency. Summary of the invention

[0004] The present invention is to solve the problem that the existing cutting device in the background art still requires the staff to manually pull out the string from the winding drum before the next cutting, and proposes a cutting device for musical instrument production.

[0005] To achieve the above object, the present invention provides the following technical solution: a cutting device for musical instrument production, comprising two bases and two facing blades, and also comprising: Two fixed wheels and a conveyor belt, two bases are rotatably connected with rotating rollers, the two rotating rollers are connected through a conveyor belt transmission, the two bases are fixed with flat plates in contact with the conveyor belt, a string is clamped between the two fixed wheels and the conveyor belt, the fixed wheels are provided with an annular groove adapted to the string, a circulation component for limiting the cyclic motion of the two fixed wheels is provided on the base, the circulation component is used to prevent the string from retracting and detaching from the fixed wheels, and a driving component for driving the two fixed wheels to move is provided on the base.

[0006] Furthermore, the circulation component includes two limit rails fixedly connected to the base, the limit rails include a straight rail and an arc rail, the limit rails are provided with a preparation position and an initial position, a U-shaped plate is fixedly connected to the fixed wheel, and a first connecting column and a second connecting column are respectively fixedly connected to the two U-shaped plates, the first connecting column is located at the preparation position, and the second connecting column is located at the initial position, and the position of the preparation position is slightly higher than the initial position.

[0007] Furthermore, a rotating plate is rotatably connected between the linear track and the arc track, and the rotating plate can rotate in the movement direction of the first connecting column and the second connecting column. An elastic connecting line is fixedly connected between the rotating plate and the limiting track.

[0008] Furthermore, the two U-shaped plates are fixedly connected with a first connecting plate and a second connecting plate, one end of the first connecting plate is fixedly connected with an electromagnet, one end of the second connecting plate is fixedly connected with an iron block, and one of the electromagnets and one of the iron blocks are in contact and attraction with each other.

[0009] Furthermore, a blocking component for blocking the movement of the second fixed wheel is provided on the limiting track, and the blocking component includes a lifting plate slidably inserted on the limiting track, two first inclined surfaces are provided on the lifting plate, a connecting strip in contact with the limiting track is fixedly connected to the lifting plate, a first rack is fixedly connected to one end of the lifting plate, a gear meshing with the first rack is rotatably connected to the limiting track through the fixing plate, a second rack meshing with the gear is provided on one side of the gear, a lifting column slidably inserted on the limiting track is fixedly connected to the second rack, and the lifting column is located on one side of the preparation position.

[0010] Furthermore, the driving assembly includes a U-shaped seat fixedly connected to the base, one end of the U-shaped seat is fixedly connected to a first motor, the output shaft of the first motor is fixedly connected to a threaded rod rotatably connected to the U-shaped seat, the outer wall of the threaded rod is threadedly connected to a moving block, the U-shaped seat is fixedly connected to a guide column passing through the moving block, the bottom of the U-shaped plate is rotatably connected to a vertical plate, one of the vertical plates is arranged on the moving block.

[0011] Furthermore, a first fixed plate is fixedly connected to the moving block, a second motor is fixedly connected to the first fixed plate, a rotating block is fixedly connected to the output shaft of the second motor, slots are provided on the vertical plates, the rotating block is located in one of the slots, and a rectangular opening is also provided on the vertical plates, the width of the rectangular opening is greater than the width of the U-shaped seat and the width of the rotating block.

[0012] Furthermore, the electromagnet and the iron block are fixedly connected with induction blocks, wherein the two induction blocks are in contact with each other, the second connecting plate is fixedly connected with a second fixing plate, the second fixing plate is fixedly connected with a third motor, the output shaft of the third motor is fixedly connected with a winding wheel, the surface of the winding wheel is fixedly connected with a connecting rope, the connecting rope passes through the second connecting plate and one end of the connecting rope is fixedly connected to the side wall of the vertical plate.

[0013] Furthermore, a cutting assembly for automatically cutting strings is provided on the flat plate, and the cutting assembly includes a cross bar fixedly connected to the two second racks, a third fixed plate fixedly connected to the limiting track, a guide rod slidably inserted on the third fixed plate, one end of the guide rod is fixedly connected to a mounting plate, the blade is mounted on the mounting plate, the other end of the guide rod is fixedly connected to a connecting plate, a spring is fixedly connected to the connecting plate, one end of the spring is fixedly connected to a fourth fixed plate, the fourth fixed plate is fixed to the flat plate, a triangular block is fixedly connected to the connecting plate, the triangular block is provided with a second inclined surface and a third inclined surface, and the cross bar is located at the top of the third inclined surface.

[0014] The technical effects and advantages of the cutting device for musical instrument production of the present invention are as follows: (1) By setting a circulation component, one of the vertical plates and the fixed wheel is driven by the driving component to move in the limit track, and the first connecting column leaves the preparation position and moves in the linear track. When the first connecting column enters under the lifting plate, the first connecting column can press the lifting plate upward through the first inclined surface. The lifting plate drives the lifting column downward through the first rack, the gear and the second rack and enters the linear track. The fixed wheel corresponding to the first connecting column cooperates with the pressure of the conveyor belt to continue to drive one end of the string to move. After moving to a suitable length, the string is cut by the cutting component. The cut end of the string will not hang down or fall, but will be clamped between another fixed wheel and the conveyor belt, so that the fixed wheel can continue to move to pull out the string.

[0015] (2) By setting a driving component, when it is necessary to pull the string through a certain fixed wheel, the first motor is started to drive the threaded rod to rotate, and the threaded rod drives the fixed wheel to move through the moving block and the vertical plate. When it is necessary to drive another fixed wheel, the second motor is started to drive the rotating block to rotate in the slot, so that the rotating block rotates to a vertical direction, drives the moving block to move, and the moving block drives the rotating block to enter the rectangular opening of another vertical plate. The second motor drives the rotating block to rotate into the slot, which can drive the other fixed wheel to move. When a certain fixed wheel returns to the initial position from the arc track, the other vertical plate needs to avoid it. The third motor is started to drive the winding wheel to rotate. The winding wheel wraps the connecting rope around its surface, and the connecting rope drives the vertical plate to rotate to avoid it. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of a first partial three-dimensional structure in the present invention; Figure 3 It is a schematic diagram of a second partial three-dimensional structure in the present invention; Figure 4 It is a schematic diagram of the fixed wheel and vertical plate structure in the present invention; Figure 5It is a schematic diagram of the limit track structure in the present invention; Figure 6 For the present invention Figure 5 The enlarged schematic diagram at A in the middle; Figure 7 For the present invention Figure 5 The enlarged schematic diagram of point B in the middle; Figure 8 It is a schematic diagram of the third partial three-dimensional structure in the present invention.

[0017] In the figure: 1. Base; 2. Blade; 3. Limiting track; 301. Preparation position; 302. Initial position; 303. Straight track; 304. Arc track; 305. Rotating plate; 306. Connecting line; 4. First connecting column; 5. Second connecting column; 6. U-shaped plate; 7. Fixed wheel; 8. Rotating roller; 9. Conveyor belt; 10. Flat plate; 11. First connecting plate; 12. Electromagnet; 13. Second connecting plate; 14. Iron block; 15. Lifting plate; 16. First inclined plane; 17. Connecting strip; 18. First rack; 19. Gear; 20. Second rack; 21. Lifting column; 22, U-shaped seat; 23, first motor; 24, threaded rod; 25, moving block; 26, vertical plate; 27, first fixed plate; 28, second motor; 29, rotating block; 30, notch; 31, rectangular opening; 32, induction block; 33, second fixed plate; 34, third motor; 35, winding wheel; 36, connecting rope; 37, cross bar; 38, third fixed plate; 39, guide rod; 40, mounting plate; 41, connecting plate; 42, triangular block; 4201, second inclined plane; 4202, third inclined plane; 43, spring; 44, fourth fixed plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Reference Figure 1 - Figure 8 , a cutting device for musical instrument production, comprising two bases 1 and two facing blades 2, and also comprising: Two fixed wheels 7 and a conveyor belt 9, two bases 1 are rotatably connected with rotating rollers 8, the two rotating rollers 8 are connected through the conveyor belt 9, the two bases 1 are fixed with a flat plate 10 in contact with the conveyor belt 9, a string is clamped between the two fixed wheels 7 and the conveyor belt 9, the fixed wheels 7 are provided with a circular groove adapted to the string, the base 1 is provided with a circulation component for limiting the circulation movement of the two fixed wheels 7, the circulation component is used to prevent the string from retracting and detaching from the fixed wheels 7, and the base 1 is provided with a driving component for driving the two fixed wheels 7 to move; When in use, the string to be cut is pulled out from the winding drum and fixed between the two fixed wheels 7 and the conveyor belt 9. The fixed wheels 7 cooperate with the conveyor belt 9 and the flat plate 10 to clamp and fix the string. When the string needs to be cut, one of the fixed wheels 7 is driven to move by the driving component, and the fixed wheel 7 cooperates with the conveyor belt 9 to pull the string out, and the string is cut by the cutting component and the blade 2. After cutting, the fixed wheel 7 at the other end cooperates with the conveyor belt 9 to clamp the cut end of the string to prevent one end of the string from hanging down or retracting, which is convenient for subsequent cutting.

[0020] Reference Figure 3 , Figure 4 and Figure 5 The circulation component includes two limiting rails 3 fixedly connected to the base 1, and the limiting rails 3 include a straight rail 303 and an arc rail 304. A preparation position 301 and an initial position 302 are set on the limiting rail 3. A U-shaped plate 6 is fixedly connected to the fixed wheel 7, and a first connecting column 4 and a second connecting column 5 are respectively fixedly connected to the two U-shaped plates 6. The first connecting column 4 is located in the preparation position 301, and the second connecting column 5 is located in the initial position 302. The position of the preparation position 301 is slightly higher than the initial position 302. When it is necessary to lengthen the string, the first connecting column 4 and the corresponding fixed wheel 7 located in the preparation position 301 are moved by the driving component, and the fixed wheel 7 cooperates with the conveyor belt 9 to pull out the string, and the other fixed wheel 7 and the second connecting column 5 remain stationary, and the first connecting column 4 is in the straight line The string moves in the track 303. After the string is pulled to a suitable length, it is cut by the cutting assembly and the blade 2. The cutting position is between the preparation position 301 and the initial position 302. Therefore, after cutting, one end of the string is clamped and fixed by another fixed wheel 7 in cooperation with the conveyor belt 9 so that it will not droop or retract. The first connecting column 4 and the corresponding fixed wheel 7 are driven by the driving assembly to return to the preparation position 301 through the straight track 303, so that the fixed wheel 7 can drive the other fixed wheel 7 to move, and bring the other fixed wheel 7 and the second connecting column 5 to the preparation position 301. The other fixed wheel 7 cooperates with the conveyor belt 9 to pull the string. The first connecting column 4 and the corresponding fixed wheel 7 are driven by the driving assembly to return to the initial position 302 along the straight track 303 and the arc track 304, and the next round of cutting can be started.

[0021] Reference Figure 5 and Figure 7A rotating plate 305 is rotatably connected between the linear track 303 and the curved track 304, and the rotating plate 305 can rotate in the movement direction of the first connecting column 4 and the second connecting column 5. An elastic connecting line 306 is fixedly connected between the rotating plate 305 and the limiting track 3; when the first connecting column 4 or the second connecting column 5 enters the curved track 304 through the linear track 303 or enters the linear track 303 through the curved track 304, the first connecting column 4 or the second connecting column 5 will press the rotating plate 305 to rotate, and the connecting line 306 will be stretched. When the first connecting column 4 or the second connecting column 5 has completely passed, the rotating plate 305 is reset under the action of the connecting line 306, and the rotating plate 305 can prevent the first connecting column 4 or the second connecting column 5 from returning to the original track again.

[0022] Reference Figure 4 , the two U-shaped plates 6 are fixedly connected with a first connecting plate 11 and a second connecting plate 13, one end of the first connecting plate 11 is fixedly connected with an electromagnet 12, and one end of the second connecting plate 13 is fixedly connected with an iron block 14, and one of the electromagnets 12 and one of the iron blocks 14 contact and attract each other; when it is necessary to lengthen the string through the fixed wheel 7, the first connecting column 4 and the corresponding fixed wheel 7 are driven to move by the driving component, the electromagnet 12 is not energized, and the other fixed wheel 7 remains in place. When the cutting is completed, the first connecting column 4 and the corresponding fixed wheel 7 are driven back to the preparation position 301 by the driving component, then the electromagnet 12 contacts with the corresponding iron block 14, the electromagnet 12 is turned on, and the electromagnet 12 attracts the iron block 14. When the driving component drives the first connecting column 4 and the corresponding fixed wheel 7 to move again, the fixed wheel 7 drives the other fixed wheel 7 to move through the electromagnet 12 and the iron block 14 until it moves to the preparation position 301, and the fixed wheel 7 cooperates with the conveyor belt 9 to pull the string.

[0023] Reference Figure 5 and Figure 6, a blocking component for blocking the movement of the second fixed wheel 7 is provided on the limiting track 3, and the blocking component includes a lifting plate 15 slidably inserted on the limiting track 3, and two first inclined surfaces 16 are provided on the lifting plate 15, and a connecting strip 17 in contact with the limiting track 3 is fixedly connected to the lifting plate 15, and a first rack 18 is fixedly connected to one end of the lifting plate 15, and a gear 19 meshing with the first rack 18 is rotatably connected to the limiting track 3 through a fixing plate, and a second rack 20 meshing with the gear 19 is provided on one side of the gear 19, and a lifting column 21 slidably inserted on the limiting track 3 is fixedly connected to the second rack 20, and the lifting column 21 is located on one side of the preparation position 301; when the cutting is completed, the first connecting column 4 and the corresponding fixed wheel 7 are driven back to the preparation position 301 by the driving component, and the electromagnet 12 is turned on to drive the other fixed wheel 7 to move, and when the first connecting column 4 leaves the preparation position 301, the first connecting column 4 can press the lifting column 21. The first inclined surface 16 of the descending plate 15 and the first connecting column 4 press the lifting plate 15 to move upward, and the lifting plate 15 drives the first rack 18 to move upward, and the first rack 18 drives the second rack 20 to move downward through the gear 19, and the second rack 20 drives the lifting column 21 to move downward and is inserted into the linear track 303, and the lifting column 21 can block the second connecting column 5, and the first connecting column 4 and the corresponding fixed wheel 7 continue to move. When the lifting column 21 blocks, the electromagnet 12 is separated from the iron block 14, and the second connecting column 5 and the corresponding fixed wheel 7 can no longer move, that is, the second connecting column 5 and the corresponding fixed wheel 7 are located in the preparation position 301, when the first connecting column 4 leaves the bottom of the lifting plate 15, under the action of gravity, the lifting plate 15 moves downward, so that the connecting strip 17 falls on the limiting track 3, and the lifting column 21 moves upward and leaves the linear track 303, releasing the blocking of the second connecting column 5, and after the first connecting column 4 returns to the initial position 302, the next cutting process can be started.

[0024] Reference Figure 2 and Figure 3 The driving assembly includes a U-shaped seat 22 fixedly connected to the base 1, one end of the U-shaped seat 22 is fixedly connected to a first motor 23, the output shaft of the first motor 23 is fixedly connected to a threaded rod 24 rotatably connected to the U-shaped seat 22, the outer wall of the threaded rod 24 is threadedly connected to a moving block 25, the U-shaped seat 22 is fixedly connected to a guide column penetrating the moving block 25, the bottom of the U-shaped plate 6 is rotatably connected to a vertical plate 26, one of the vertical plates 26 is arranged on the moving block 25; when it is necessary to drive the fixed wheel 7 to move through the driving assembly, the first motor 23 is started, the first motor 23 drives the threaded rod 24 to rotate, the threaded rod 24 drives the moving block 25 to move in the horizontal direction, and the moving block 25 can drive the corresponding fixed wheel 7 to move through the vertical plate 26.

[0025] Reference Figure 3 and Figure 4, the moving block 25 is fixedly connected to a first fixed plate 27, the first fixed plate 27 is fixedly connected to a second motor 28, the output shaft of the second motor 28 is fixedly connected to a rotating block 29, the vertical plates 26 are provided with slots 30, the rotating block 29 is located in one of the slots 30, the vertical plates 26 are also provided with a rectangular opening 31, the width of the rectangular opening 31 is greater than the width of the U-shaped seat 22 and the width of the rotating block 29; when the driving assembly drives the corresponding fixed wheel 7 to move through the moving block 25 and the vertical plate 26, the rotating block 29 is located in the slot 30 of the corresponding vertical plate 26, when the first connecting column 4 or the second connecting column 4 The column 5 moves in the arc track 304, and the rotating block 29 moves upward in the slot 30 relative to the vertical plate 26. When it is necessary to make the driving assembly drive another fixed wheel 7 to move, the second motor 28 is started, and the second motor 28 drives the rotating block 29 to rotate, so that the rotating block 29 rotates to a vertical state. The driving assembly can make the rotating block 29 leave the rectangular opening 31 of the vertical plate 26, and the rotating block 29 enters the rectangular opening 31 of another vertical plate 26. The second motor 28 drives the rotating block 29 to rotate to a horizontal state again, and the rotating block 29 enters the slot 30, which can drive the vertical plate 26 and the corresponding fixed wheel 7 to move.

[0026] Reference Figure 4 , the electromagnet 12 and the iron block 14 are both fixedly connected with induction blocks 32, wherein the two induction blocks 32 are in contact with each other, the second connecting plate 13 is both fixedly connected with a second fixing plate 33, the second fixing plate 33 is fixedly connected with a third motor 34, the output shaft of the third motor 34 is fixedly connected with a winding wheel 35, the surface of the winding wheel 35 is fixedly connected with a connecting rope 36, the connecting rope 36 passes through the second connecting plate 13 and one end of the connecting rope is fixedly connected to the side wall of the vertical plate 26; when one of the fixed wheels 7 returns to the initial position 302 through the arc track 304, the vertical plate 26 corresponding to the other fixed wheel 7 will cause an obstruction Obstacles need to be avoided. When the cutting is completed, a fixed wheel 7 drives another fixed wheel 7 to reach the preparation position 301. At this time, the electromagnet 12 and the iron block 14 are separated, and the two induction blocks 32 are also separated, that is, the third motor 34 is started, and the third motor 34 drives the winding wheel 35 to rotate. The winding wheel 35 reels the connecting rope 36 onto its surface. The connecting rope 36 can pull the vertical plate 26 to rotate, so that the vertical plate 26 can avoid. When the fixed wheel 7 and the vertical plate 26 pass, the third motor 34 is started to drive the winding wheel 35 to reverse, and the connecting rope 36 is released. Under the action of gravity, the vertical plate 26 returns to the vertical state.

[0027] Reference Figure 2 and Figure 8, the flat plate 10 is provided with a cutting assembly for automatically cutting the string, the cutting assembly includes a cross bar 37 fixed to the two second racks 20, a third fixed plate 38 is fixed to the limiting track 3, a guide rod 39 is slidably inserted on the third fixed plate 38, one end of the guide rod 39 is fixed to a mounting plate 40, the blade 2 is mounted on the mounting plate 40, the other end of the guide rod 39 is fixed to a connecting plate 41, a spring 43 is fixed to the connecting plate 41, one end of the spring 43 is fixed to a fourth fixing plate 44, the fourth fixing plate 44 is fixed to the flat plate 10, a triangular block 42 is fixed to the connecting plate 41, a second inclined surface 4201 and a third inclined surface 4202 are provided on the triangular block 42, and the cross bar 37 is located at the top of the third inclined surface 4202; when the first connecting column 4 leaves the preparation position 301 to press the lifting plate 15, the lifting plate 15 moves upward, and the lifting plate 15 passes through the first rack 18 and The gear 19 drives the second rack 20 to move downward, and the second rack 20 drives the cross bar 37 to press the triangular block 42, that is, the cross bar 37 reaches the bottom end of the third inclined surface 4202 from the top end. When the first connecting column 4 and the corresponding fixed wheel 7 pull the string out to a suitable length, that is, the first connecting column 4 just leaves the lifting plate 15, under the action of gravity, the lifting plate 15 moves downward, and the lifting plate 15 drives the second rack 20 to move upward through the first rack 18 and the gear 19, and the second rack 20 drives the cross bar 37 to move upward, and the cross bar 37 presses the triangular block 42 through the second inclined surface 4201, and the spring 43 is compressed. The triangular block 42 drives the mounting plate 40 and the blade 2 to move through the connecting plate 41 and the guide rod 39, and the two blades 2 cut the string. After the cutting is completed, the cross bar 37 leaves the second inclined surface 4201, and under the action of the spring 43, the triangular block 42 returns to its original position, and the cross bar 37 returns to the top end of the third inclined surface 4202.

[0028] Working principle: When in use, the string to be cut is pulled out from the winding drum and fixed between the two fixed wheels 7 and the conveyor belt 9. The fixed wheels 7 cooperate with the conveyor belt 9 and the flat plate 10 to clamp and fix the string. When the string needs to be cut, one of the fixed wheels 7 is driven to move by the driving component, and the fixed wheel 7 cooperates with the conveyor belt 9 to pull the string out, and the string is cut by the cutting component and the blade 2. After cutting, the fixed wheel 7 at the other end cooperates with the conveyor belt 9 to clamp the cut end of the string to prevent one end of the string from hanging down or retracting, so as to facilitate subsequent cutting. When it is necessary to lengthen the string, the first connecting column 4 and the corresponding fixed wheel 7 located at the preparation position 301 are moved by the driving component, and the fixed wheel 7 cooperates with the conveyor belt 9 to pull out the string, and the other fixed wheel 7 and the second connecting column 5 remain stationary, and the first connecting column 4 moves in the linear track 303. After the string is pulled out to a suitable length, the string is cut by the cutting component and the blade 2. The cutting position is between the preparation position 301 and the initial position 302, so that after cutting, one end of the string is clamped and fixed by the other fixed wheel 7 and the conveyor belt 9 so that it will not droop or retract. The first connecting column 4 and the corresponding fixed wheel 7 are driven by the driving component to return to the preparation position 301 through the linear track 303, so that the fixed wheel 7 can drive the other fixed wheel 7 to move, and bring the other fixed wheel 7 and the second connecting column 5 to the preparation position 301. The other fixed wheel 7 cooperates with the conveyor belt 9 to pull the string, and the first connecting column 4 and the corresponding fixed wheel 7 are driven by the driving component to return to the initial position 302 along the linear track 303 and the arc track 304, and the next round of cutting can be started; When the first connecting column 4 or the second connecting column 5 passes through the straight track 303 and enters the curved track 304 or passes through the curved track 304 and enters the straight track 303, the first connecting column 4 or the second connecting column 5 will press the rotating plate 305 to rotate, and the connecting line 306 will be stretched. When the first connecting column 4 or the second connecting column 5 completely passes, the rotating plate 305 is reset under the action of the connecting line 306, and the rotating plate 305 can prevent the first connecting column 4 or the second connecting column 5 from returning to the track they came from. When it is necessary to lengthen the string through the fixed wheel 7, the first connecting column 4 and the corresponding fixed wheel 7 are driven to move through the driving component, the electromagnet 12 is not energized, and the other fixed wheel 7 remains in place. When the cutting is completed, the first connecting column 4 and the corresponding fixed wheel 7 are driven back to the preparation position 301 through the driving component, and the electromagnet 12 contacts the corresponding iron block 14, and the electromagnet 12 is turned on. The electromagnet 12 attracts the iron block 14. When the driving component drives the first connecting column 4 and the corresponding fixed wheel 7 to move again, the fixed wheel 7 drives the other fixed wheel 7 to move through the electromagnet 12 and the iron block 14 until it moves to the preparation position 301, and the fixed wheel 7 cooperates with the conveyor belt 9 to pull the string; When the cutting is completed, the first connecting column 4 and the corresponding fixed wheel 7 are driven back to the preparation position 301 by the driving assembly, and the electromagnet 12 is turned on to drive the other fixed wheel 7 to move. When the first connecting column 4 leaves the preparation position 301, the first connecting column 4 can press the first inclined surface 16 of the lifting plate 15, and the first connecting column 4 presses the lifting plate 15 to move upward, and the lifting plate 15 drives the first rack 18 to move upward, and the first rack 18 drives the second rack 20 to move downward through the gear 19, and the second rack 20 drives the lifting column 21 to move downward and is inserted into the linear track 303, and the lifting column 21 can press the second connecting column 5 The first connecting column 4 and the corresponding fixed wheel 7 continue to move. When the lifting column 21 blocks, the electromagnet 12 separates from the iron block 14, and the second connecting column 5 and the corresponding fixed wheel 7 cannot move anymore, that is, the second connecting column 5 and the corresponding fixed wheel 7 are located in the preparation position 301. When the first connecting column 4 leaves the bottom of the lifting plate 15, the lifting plate 15 moves downward under the action of gravity, so that the connecting strip 17 falls on the limiting track 3, and the lifting column 21 moves upward and leaves the linear track 303, releasing the blockage of the second connecting column 5. After the first connecting column 4 returns to the initial position 302, the next cutting process can be started. When it is necessary to drive the fixed wheel 7 to move through the driving assembly, the first motor 23 is started, the first motor 23 drives the threaded rod 24 to rotate, the threaded rod 24 drives the moving block 25 to move in the horizontal direction, and the moving block 25 drives the corresponding fixed wheel 7 to move through the vertical plate 26; When the driving assembly drives the corresponding fixed wheel 7 to move through the moving block 25 and the vertical plate 26, the rotating block 29 is located in the slot 30 of the corresponding vertical plate 26. When the first connecting column 4 or the second connecting column 5 moves in the arc track 304, the rotating block 29 moves upward in the slot 30 relative to the vertical plate 26. When it is necessary to make the driving assembly drive another fixed wheel 7 to move, the second motor 28 is started, and the second motor 28 drives the rotating block 29 to rotate, so that the rotating block 29 rotates to a vertical state. The driving assembly can make the rotating block 29 leave the rectangular opening 31 of the vertical plate 26, so that the rotating block 29 enters the rectangular opening 31 of another vertical plate 26. The second motor 28 drives the rotating block 29 to rotate to a horizontal state again. The rotating block 29 enters the slot 30, which can drive the vertical plate 26 and the corresponding fixed wheel 7 to move. When one of the fixed wheels 7 returns to the initial position 302 through the arc track 304, the vertical plate 26 corresponding to the other fixed wheel 7 will cause an obstacle and needs to be avoided. When the cutting is completed, the fixed wheel 7 drives the other fixed wheel 7 to reach the preparation position 301. At this time, the electromagnet 12 and the iron block 14 are separated, and the two induction blocks 32 are also separated, that is, the third motor 34 is started, and the third motor 34 drives the winding wheel 35 to rotate. The winding wheel 35 reels the connecting rope 36 onto its surface. The connecting rope 36 can pull the vertical plate 26 to rotate, so that the vertical plate 26 can avoid. When the fixed wheel 7 and the vertical plate 26 pass, the third motor 34 is started to drive the winding wheel 35 to reverse, and the connecting rope 36 is released. Under the action of gravity, the vertical plate 26 returns to the vertical state. When the first connecting column 4 leaves the preparation position 301 to press the lifting plate 15, the lifting plate 15 moves upward, and the lifting plate 15 drives the second rack 20 to move downward through the first rack 18 and the gear 19, and the second rack 20 drives the cross bar 37 to press the triangular block 42, that is, the cross bar 37 reaches the bottom end from the top of the third inclined surface 4202. When the first connecting column 4 and the corresponding fixed wheel 7 pull the string to a suitable length, that is, the first connecting column 4 just leaves the lifting plate 15, under the action of gravity, the lifting plate 15 moves downward, and the lifting plate 15 passes The first rack 18 and the gear 19 drive the second rack 20 to move upward, and the second rack 20 drives the cross bar 37 to move upward. The cross bar 37 presses the triangular block 42 through the second inclined surface 4201, and the spring 43 is compressed. The triangular block 42 drives the mounting plate 40 and the blade 2 to move through the connecting plate 41 and the guide rod 39, and the two blades 2 cut the chord. After the cutting is completed, the cross bar 37 leaves the second inclined surface 4201, and under the action of the spring 43, the triangular block 42 returns to its original position, and the cross bar 37 returns to the top of the third inclined surface 4202.

[0029] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0030] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutting device for musical instrument production, comprising two bases (1) and two facing blades (2), characterized in that: Also includes: Two fixed wheels (7) and a conveyor belt (9), two bases (1) are rotatably connected with rotating rollers (8), the two rotating rollers (8) are connected to each other by means of a conveyor belt (9), the two bases (1) are fixedly connected with a flat plate (10) in contact with the conveyor belt (9), a string is clamped between the two fixed wheels (7) and the conveyor belt (9), the fixed wheels (7) are provided with an annular groove adapted to the string, a circulating component for limiting the cyclic movement of the two fixed wheels (7) is provided on the base (1), the circulating component is used to prevent the string from retracting and detaching from the fixed wheels (7), and a driving component for driving the two fixed wheels (7) to move is provided on the base (1); The circulation assembly comprises two limit rails (3) fixedly connected to the base (1), the limit rails (3) comprising a straight rail (303) and an arc rail (304), a preparation position (301) and an initial position (302) are arranged on the limit rails (3), a U-shaped plate (6) is fixedly connected to the fixed wheel (7), a first connecting column (4) and a second connecting column (5) are respectively fixedly connected to the two U-shaped plates (6), the first connecting column (4) is located at the preparation position (301), the second connecting column (5) is located at the initial position (302), and the preparation position (301) is slightly higher than the initial position (302).

2. A cutting device for musical instrument production according to claim 1, characterized in that: A rotating plate (305) is rotatably connected between the linear track (303) and the arc track (304); the rotating plate (305) can rotate in the direction of movement of the first connecting column (4) and the second connecting column (5); and an elastic connecting line (306) is fixedly connected between the rotating plate (305) and the limiting track (3).

3. A cutting device for musical instrument production according to claim 2, characterized in that: A first connecting plate (11) and a second connecting plate (13) are fixedly connected to the two U-shaped plates (6); one end of the first connecting plate (11) is fixedly connected to an electromagnet (12); one end of the second connecting plate (13) is fixedly connected to an iron block (14); one of the electromagnets (12) and one of the iron blocks (14) are in contact and attract each other.

4. A cutting device for musical instrument production according to claim 3, characterized in that: The limiting track (3) is provided with a blocking component for blocking the movement of the second fixed wheel (7), the blocking component comprising a lifting plate (15) slidably inserted on the limiting track (3), the lifting plate (15) being provided with two first inclined surfaces (16), the lifting plate (15) being fixedly connected with a connecting strip (17) in contact with the limiting track (3), one end of the lifting plate (15) being fixedly connected with a first rack (18), the limiting track (3) being rotatably connected with a gear (19) meshing with the first rack (18) via the fixing plate, one side of the gear (19) being provided with a second rack (20) meshing with the gear (19), the second rack (20) being fixedly connected with a lifting column (21) slidably inserted on the limiting track (3), the lifting column (21) being located on one side of the preparation position (301).

5. A cutting device for musical instrument production according to claim 4, characterized in that: The driving assembly comprises a U-shaped seat (22) fixedly connected to the base (1); one end of the U-shaped seat (22) is fixedly connected to a first motor (23); an output shaft of the first motor (23) is fixedly connected to a threaded rod (24) rotatably connected to the U-shaped seat (22); an outer wall of the threaded rod (24) is threadedly connected to a moving block (25); a guide column penetrating the moving block (25) is fixedly connected to the U-shaped seat (22); and the bottom of each of the U-shaped plates (6) is rotatably connected to a vertical plate (26), wherein one of the vertical plates (26) is arranged on the moving block (25).

6. A cutting device for musical instrument production according to claim 5, characterized in that: The moving block (25) is fixedly connected to a first fixed plate (27), the first fixed plate (27) is fixedly connected to a second motor (28), the output shaft of the second motor (28) is fixedly connected to a rotating block (29), the vertical plates (26) are each provided with a notch (30), the rotating block (29) is located in one of the notches (30), and the vertical plates (26) are also provided with a rectangular opening (31), the width of the rectangular opening (31) being greater than the width of the U-shaped seat (22) and the width of the rotating block (29).

7. A cutting device for musical instrument production according to claim 6, characterized in that: The electromagnet (12) and the iron block (14) are both fixedly connected with induction blocks (32), wherein the two induction blocks (32) are in contact with each other, the second connecting plate (13) is both fixedly connected with a second fixing plate (33), the second fixing plate (33) is fixedly connected with a third motor (34), the output shaft of the third motor (34) is fixedly connected with a winding wheel (35), the surface of the winding wheel (35) is fixedly connected with a connecting rope (36), the connecting rope (36) passes through the second connecting plate (13) and one end of the connecting rope is fixedly connected to the side wall of the vertical plate (26).

8. A cutting device for musical instrument production according to claim 7, characterized in that: The plate (10) is provided with a cutting assembly for automatically cutting strings, the cutting assembly comprising a cross bar (37) fixedly connected to the two second racks (20), a third fixed plate (38) fixedly connected to the limiting track (3), a guide rod (39) slidably inserted on the third fixed plate (38), one end of the guide rod (39) fixedly connected to a mounting plate (40), the blade (2) being mounted on the mounting plate (40), the other end of the guide rod (39) fixedly connected to a connecting plate (41), a spring (43) fixedly connected to the connecting plate (41), one end of the spring (43) fixedly connected to a fourth fixed plate (44), the fourth fixed plate (44) being fixedly connected to the plate (10), a triangular block (42) fixedly connected to the connecting plate (41), the triangular block (42) being provided with a second inclined surface (4201) and a third inclined surface (4202), the cross bar (37) being located at the top end of the third inclined surface (4202).

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