Guitar neck polishing mechanism

Abstract

The invention relates to the technical field of guitar processing equipment, and discloses a guitar neck grinding mechanism which comprises a bottom frame, a neck feeding turnover mechanism, a side edge grinding mechanism and an upper and lower face grinding mechanism are arranged at the upper end of the bottom frame, and the side edge grinding mechanism comprises a lifting frame and a reciprocating mechanism controlling the lifting frame to move up and down. And two moving frames which are bilaterally symmetrical are slidably installed on the inner side of the lifting frame, side face grinding rollers are rotatably installed on the inner sides of the moving frames, a plurality of first springs connected with the lifting frame are installed on the outer walls of the moving frames at equal intervals, and a driving piece for controlling the two side face grinding rollers to rotate relatively is arranged at the upper end of the lifting frame. The device has the following advantages and effects that automatic polishing of the inclined side face of the neck can be achieved, and manual intervention is completely abandoned; meanwhile, an up-and-down reciprocating motion mechanism of the polishing roller is innovatively designed, so that the abrasive paper is used uniformly, the service life is prolonged, and the polishing quality is improved.

Description

Technical Field

[0001] This invention relates to the field of guitar processing equipment technology, and in particular to a guitar neck grinding mechanism. Background Technology

[0002] In guitar manufacturing, the neck polishing process directly affects the instrument's playability and tonal stability. Traditional neck polishing relies heavily on manual operation, requiring workers to repeatedly adjust the neck angle and hand-grind the sloping sides with sandpaper or a grinding wheel. This method has significant drawbacks: First, manual polishing makes it difficult to ensure the symmetry and consistency of the slope on both sides, easily leading to uneven surface roughness and affecting playing comfort. Second, frequent handling and repositioning adjustments are not only inefficient but also prone to neck damage due to operational errors, making it difficult to meet the demands of mass production. Furthermore, while some existing automated polishing devices can improve efficiency, they are mostly designed for the flat structure of the sheet metal and cannot adapt to the slope of the neck's sides, resulting in unsatisfactory polishing effects. More importantly, traditional polishing rollers are usually in a fixed position during operation, leading to low sandpaper utilization, localized wear, and frequent replacements, further increasing costs. Therefore, it is necessary to propose a guitar neck polishing mechanism to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a guitar neck sanding mechanism that can automatically sand the tilted side of the neck, completely eliminating manual intervention; at the same time, the innovative design of the sanding roller's reciprocating motion mechanism ensures even application of sandpaper, extends its service life, and improves sanding quality.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a guitar neck polishing mechanism, including a base frame, the upper end of which is provided with a neck feeding and flipping mechanism, a side polishing mechanism, and an upper and lower surface polishing mechanism. The side polishing mechanism includes a lifting frame and a reciprocating mechanism for controlling the up and down movement of the lifting frame. Two symmetrically mounted movable frames are slidably installed on the inner side of the lifting frame. Side polishing rollers are rotatably installed on the inner side of the movable frames. Multiple first springs connecting the lifting frame are equidistantly installed on the outer wall. A driving component for controlling the relative rotation of the two side polishing rollers is provided at the upper end of the lifting frame. Guide rails adapted to the sliding of the movable frames are fixedly installed on the upper and lower end faces of the inner side of the lifting frame.

[0005] By adopting the above technical solution, the neck is fed to the space between two side sanding rollers by the neck feeding and flipping mechanism. The side sanding rollers on both sides are controlled to rotate relative to each other by the drive component to sand the two sides of the neck. The extension and retraction force of the first spring ensures that the two side sanding rollers can always be in close contact with the neck to sand the beveled surfaces on both sides of the neck. At the same time, the reciprocating mechanism drives the lifting frame to move up and down, so that the two side sanding rollers move up and down repeatedly, making the sandpaper used evenly, extending its service life and improving the sanding quality.

[0006] A further configuration of the present invention is as follows: the driving component includes a dual-axis motor fixedly mounted on the upper end of the lifting frame, a fixed block slidably connected to the lifting frame is fixedly mounted on the top of the moving frame, a telescopic slide rod rotatably connected to the fixed block is installed at the output end of the dual-axis motor, and a first bevel tooth structure is installed between the telescopic slide rod and the side grinding roller.

[0007] By adopting the above technical solution, the telescopic slide rods on both sides are rotated by a dual-axis motor, and the two side grinding rollers are rotated relative to each other by the drive of the first bevel tooth structure, so as to grind both sides of the neck at the same time.

[0008] A further feature of the present invention is that the telescopic slide rod includes a rotating sleeve installed at the output end of a dual-axis motor, a movable rod is slidably disposed inside the rotating sleeve, four sliding blocks are circumferentially installed at one end of the movable rod extending into the rotating sleeve, and the outer wall of the rotating sleeve is provided with a groove for the sliding blocks to slide back and forth.

[0009] By adopting the above technical solution, when the dual-axis motor drives the rotating sleeve to rotate, the sliding block and the slot can drive the movable rod to rotate, and under the drive of the first bevel tooth structure, the side grinding rollers will rotate. The movable rod can extend and retract inside the rotating sleeve, so that the two side grinding rollers are not affected when the spacing is changed.

[0010] A further feature of the present invention is that the neck feeding and flipping mechanism includes a neck placement frame mounted on a base frame and a lead screw structure for driving the neck placement frame to slide left and right. The upper end face of the neck placement frame is equipped with a neck and a positioning structure for installing and flipping the neck.

[0011] By adopting the above technical solution, the neck is fixed to the upper end of the neck holder by the positioning structure, and then sent to the two side grinding rollers by the screw structure for grinding on both sides. After that, it is sent to the upper and lower grinding mechanism for automated grinding on the upper and lower surfaces, thus realizing the entire automated operation.

[0012] A further embodiment of the present invention is that the lead screw structure includes a drive motor mounted on the left end face of the base frame, the output end of the drive motor is equipped with a ball screw that is threadedly connected to the neck support frame, and the base frame is equipped with a guide rod that is slidably connected to the neck support frame above the ball screw.

[0013] By adopting the above technical solution, the ball screw is rotated by the drive motor, and under the limit of the guide rod, the neck support slides left and right, thereby controlling the displacement of the neck.

[0014] A further configuration of the present invention is as follows: the positioning structure includes a flip motor installed on one side of the top of the neck support, the output end of the flip motor is equipped with a first limiting frame adapted to one end of the neck, a movable seat is slidably arranged on the neck support on the other side, a second spring connected to the neck support is installed on the inner side of the movable seat, and a second limiting frame adapted to the other end of the neck is rotatably connected to the outside.

[0015] By adopting the above technical solution, the movable seat is held and pulled to the right, which compresses the second spring and increases the distance between the first and second limiting frames. This places the neck between the first and second limiting frames and fixes it by the compression of the second spring. After polishing the upper end surface, the neck is flipped by the flipping motor, and the lower end surface can be polished.

[0016] A further configuration of the present invention is as follows: the reciprocating mechanism includes two spline rollers rotatably disposed on the top of the base frame and a lifting plate slidably disposed between the two spline rollers. The lifting plate is fixedly mounted on the bottom of the lifting frame. Lifting protrusions are provided on both the front and rear side walls of the lifting plate. Track grooves for the lifting protrusions to slide up and down are provided on the outer wall of the spline rollers. A linkage component is provided between the lead screw structure and the reciprocating mechanism.

[0017] By adopting the above technical solution, while the screw structure drives the neck to move to the right, the reciprocating mechanism is operated through the linkage component. Specifically, the rotation of the ball screw can drive the two spline rollers to rotate relative to each other. Under the action of the track groove, the lifting cams on both sides are pushed to rise and fall synchronously, thereby driving the lifting plate to move up and down, controlling the side polishing rollers on both sides to move up and down, so as to better polish the sides of the neck.

[0018] A further configuration of the present invention is as follows: the linkage component includes a rotating rod and a connecting rod rotatably mounted on the base frame; a second bevel gear structure is installed between the rotating rod and the ball screw; a first transmission belt structure is installed between the rotating rod and the connecting rod; a first gear is installed at the lower end of the connecting rod; a second gear meshing with the first gear is installed at the lower end of the spline roller located on one side of the connecting rod; and a second transmission belt structure is installed between the bottom of the connecting rod and another spline roller.

[0019] By adopting the above technical solution, when the ball screw is running, the rotating rod is driven to rotate through the second bevel gear structure. Both the second and first bevel gear structures are composed of two meshing bevel teeth, and their operation is common mechanical knowledge. The rotating rod drives the connecting rod to rotate through the first transmission belt structure. The connecting rod drives one spline roller to rotate through the action of the first and second gears, and drives another spline roller to rotate relative to it through the second transmission belt structure, so that the lifting plate can move up and down reciprocally. Both the first and second transmission belt structures are composed of two synchronous pulleys and a synchronous belt sleeved between the two synchronous pulleys, and their operation is common mechanical knowledge. This application can achieve synchronous rotation of the two spline rollers by adjusting the gear parameters of the first and second gears, which is very common in the mechanical field.

[0020] A further feature of the present invention is that four vertical rods are fixedly mounted on the top of the base frame, and guide blocks that are slidably connected to the vertical rods are fixedly mounted on both sides of the end of the lifting plate.

[0021] By adopting the above technical solution, the lifting plate can be raised and lowered more smoothly under the guidance of the vertical rod and the guide block, and the reciprocating motion of the spline roller can be raised and lowered more stably.

[0022] A further configuration of the present invention is as follows: the upper and lower surface grinding mechanism includes a fixed frame fixedly mounted on the top of the base frame, a cylinder is mounted on the upper end face of the fixed frame, a grinding motor is mounted on the output end of the cylinder, and upper and lower surface grinding rollers are mounted on the output end of the grinding motor.

[0023] By adopting the above technical solution, the upper and lower grinding rollers are driven to rotate by a grinding motor and their lifting and lowering are controlled by a cylinder. In conjunction with the rotation of the neck, the upper and lower end surfaces can be automatically ground.

[0024] The beneficial effects of this invention are:

[0025] 1. The present invention, through the setting of the driving component and the telescopic slide rod, can control the relative rotation of the side polishing rollers on both sides to polish the two sides of the neck. The extension and retraction force of the first spring allows the two side polishing rollers to always be in close contact with the neck. When the neck passes between the two side polishing rollers, the slopes on both sides of the neck can be completely polished.

[0026] 2. In this invention, the linkage component causes the two spline rollers to rotate relative to each other when the neck moves to the right. Under the action of the track groove, the lifting protrusions on both sides are pushed to rise and fall synchronously, thereby driving the lifting plate to move up and down repeatedly. This controls the side sanding rollers on both sides to move up and down, so that the sandpaper is used evenly, extending its service life and improving the sanding quality.

[0027] 3. In this invention, after both sides of the neck are completely polished and passed through the side polishing rollers, the upper and lower polishing rollers are driven to rotate by the polishing motor and their lifting and lowering are controlled by the cylinder. In conjunction with the flipping motor to flip the neck, the upper and lower end surfaces can be automatically polished, making the degree of automation higher and the processing of the neck more convenient. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is an overall structural diagram of a guitar neck polishing mechanism according to the present invention.

[0030] Figure 2 This is the present invention. Figure 1 Overall structural diagram of the central lifting frame.

[0031] Figure 3 This is the present invention. Figure 2 Top structure diagram of the central lifting frame.

[0032] Figure 4 This is the present invention. Figure 3 Structural diagram of the telescopic slide bar.

[0033] Figure 5 This is the present invention. Figure 1 Diagram showing the linkage structure between the feeding and turning mechanism and the reciprocating mechanism of the middle neck.

[0034] Figure 6 This is the present invention. Figure 1 Structural diagram of the feeding and turning mechanism of the middle neck.

[0035] Figure 7 This is the present invention. Figure 1 Structural diagram of the reciprocating mechanism.

[0036] Figure 8 This is the present invention. Figure 1 Structural diagram of the upper, middle, and lower grinding mechanism.

[0037] In the diagram: 1. Base frame; 2. Neck feeding and flipping mechanism; 21. Neck placement rack; 22. Neck; 23. Drive motor; 24. Ball screw; 25. Guide rod; 26. Flipping motor; 27. First limit frame; 28. Moving seat; 29. ​​Second spring; 210. Second limit frame; 3. Side grinding mechanism; 31. Lifting frame; 32. Moving frame; 33. Side grinding roller; 34. First spring; 35. Guide rail; 36. Dual-axis motor; 37. Fixing block; 38. First bevel gear structure; 39. Rotary... 310. Moving sleeve; 311. Moving rod; 312. Sliding stop; 4. Upper and lower surface grinding mechanism; 41. Fixed frame; 42. Cylinder; 43. Grinding motor; 44. Upper and lower surface grinding rollers; 5. Reciprocating mechanism; 51. Spline roller; 52. Lifting plate; 53. Lifting convex column; 54. Track groove; 55. Rotating rod; 56. Connecting rod; 57. Second bevel gear structure; 58. First transmission belt structure; 59. First gear; 510. Second gear; 511. Second transmission belt structure; 512. Vertical rod; 513. Guide block. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] like Figure 1 , Figure 2 As shown, a guitar neck polishing mechanism includes a base frame 1. The upper end of the base frame 1 is provided with a neck feeding and flipping mechanism 2, a side polishing mechanism 3, and an upper and lower surface polishing mechanism 4. The side polishing mechanism 3 includes a lifting frame 31 and a reciprocating mechanism 5 for controlling the up and down movement of the lifting frame 31. Two symmetrically mounted movable frames 32 are slidably installed on the inner side of the lifting frame 31. Side polishing rollers 33 are rotatably installed on the inner side of the movable frames 32. Multiple first springs 34 connected to the lifting frame 31 are equidistantly installed on the outer wall. A driving component for controlling the relative rotation of the two side polishing rollers 33 is provided at the upper end of the lifting frame 31. Guide rails 35 that are slidably adapted to the movable frames 32 are fixedly installed on the upper and lower end faces of the inner side of the lifting frame 31.

[0040] The neck 22 is fed between two side sanding rollers 33 by the neck feeding and flipping mechanism 2. The side sanding rollers 33 on both sides are controlled to rotate relative to each other by the drive component to sand the two sides of the neck 22. The extension and retraction force of the first spring 34 ensures that the two side sanding rollers 33 can always be in close contact with the neck 22 to sand the inclined surfaces on both sides of the neck 22. At the same time, the reciprocating mechanism 5 drives the lifting frame 31 to move up and down, so that the two side sanding rollers 33 move up and down continuously, so that the sandpaper is used evenly, extending the service life and improving the sanding quality.

[0041] like Figure 2 , Figure 3 , Figure 4 As shown, the driving component includes a dual-axis motor 36 fixedly mounted on the upper end of the lifting frame 31. A fixed block 37 slidably connected to the lifting frame 31 is fixedly mounted on the top of the moving frame 32. A telescopic slide rod rotatably connected to the fixed block 37 is installed at the output end of the dual-axis motor 36. A first bevel tooth structure 38 is installed between the telescopic slide rod and the side grinding roller 33. The telescopic slide rod includes a rotating sleeve 39 installed at the output end of the dual-axis motor 36. A movable rod 310 is slidably arranged inside the rotating sleeve 39. Four sliding blocks 311 are installed on the circumference of the movable rod 310 at one end extending into the rotating sleeve 39. The outer wall of the rotating sleeve 39 is provided with a slot for the sliding blocks 311 to slide back and forth.

[0042] The dual-axis motor 36 rotates the telescopic sliding rods on both sides, and through the drive of the first bevel gear structure 38, the two side grinding rollers 33 rotate relative to each other, simultaneously grinding both sides of the neck 22. When the dual-axis motor 36 drives the rotating sleeve 39 to rotate, the sliding stop 311 and the slot can drive the movable rod 310 to rotate, and under the drive of the first bevel gear structure 38, the side grinding rollers 33 rotate. The movable rod 310 can extend and retract within the rotating sleeve 39, so that the two side grinding rollers 33 are not affected when the spacing is changed.

[0043] like Figure 5 , Figure 6 , Figure 7 As shown, the neck feeding and flipping mechanism 2 includes a neck placement frame 21 mounted on the base frame 1 and a screw structure that drives the neck placement frame 21 to slide left and right. The upper end face of the neck placement frame 21 is equipped with a neck 22 and a positioning structure for mounting and flipping the neck 22. The screw structure includes a drive motor 23 mounted on the left end face of the base frame 1. The output end of the drive motor 23 is equipped with a ball screw 24 that is threadedly connected to the neck placement frame 21. The base frame 1 is equipped with a guide rod 25 that is slidably connected to the neck placement frame 21 above the ball screw 24.

[0044] The neck 22 is fixed to the upper end of the neck support 21 by the positioning structure, and is sent between the two side grinding rollers 33 by the screw structure for grinding on both sides. Then it is sent to the upper and lower grinding mechanism 4 for automated grinding on the upper and lower surfaces, realizing the entire automated operation. The drive motor 23 controls the ball screw 24 to rotate, and under the limit of the guide rod 25, the neck support 21 slides left and right, thereby controlling the displacement of the neck 22.

[0045] like Figure 6 As shown, the positioning structure includes a flip motor 26 installed on one side of the top of the neck support 21. The output end of the flip motor 26 is equipped with a first limiting frame 27 adapted to one end of the neck 22. A movable seat 28 is slidably arranged on the neck support 21 on the other side. A second spring 29 connected to the neck support 21 is installed on the inner side of the movable seat 28, and a second limiting frame 210 adapted to the other end of the neck 22 is rotatably connected to the outside.

[0046] Hold the movable seat 28 and pull it to the right, so that the second spring 29 is compressed, and the distance between the first limit frame 27 and the second limit frame 210 is increased, so that the neck 22 is placed between the first limit frame 27 and the second limit frame 210 and is fixed by the compression of the second spring 29. After polishing the upper end surface, the neck 22 is flipped by the flipping motor 26, and the lower end surface can be polished.

[0047] like Figure 2 , Figure 7 As shown, the reciprocating mechanism 5 includes two spline rollers 51 rotatably mounted on the top of the base frame 1 and a lifting plate 52 slidably mounted between the two spline rollers 51. The lifting plate 52 is fixedly mounted on the bottom of the lifting frame 31. Lifting protrusions 53 are provided on both the front and rear side walls of the lifting plate 52. The outer wall of the spline rollers 51 is provided with a track groove 54 for the lifting protrusions 53 to slide up and down. A linkage component is provided between the screw structure and the reciprocating mechanism 5.

[0048] While the screw structure drives the neck 22 to move to the right, the reciprocating mechanism 5 is operated through the linkage component. Specifically, the rotation of the ball screw 24 can drive the two spline rollers 51 to rotate relative to each other. Under the action of the track groove 54, the lifting protrusions 53 on both sides are pushed to rise and fall synchronously, thereby driving the lifting plate 52 to move up and down, controlling the side polishing rollers 33 on both sides to move up and down, so as to better polish the sides of the neck 22.

[0049] like Figure 5 , Figure 7As shown, the linkage component includes a rotating rod 55 and a connecting rod 56 rotatably mounted on the base frame 1. A second bevel gear structure 57 is installed between the rotating rod 55 and the ball screw 24, and a first transmission belt structure 58 is installed between the rotating rod 55 and the connecting rod 56. A first gear 59 is installed at the lower end of the connecting rod 56. A second gear 510 that meshes with the first gear 59 is installed at the lower end of the spline roller 51 located on one side of the connecting rod 56. A second transmission belt structure 511 is installed between the bottom of the connecting rod 56 and another spline roller 51. Four vertical rods 512 are fixedly mounted on the top of the base frame 1. Guide blocks 513 that are slidably connected to the vertical rods 512 are fixedly mounted on both sides of the end of the lifting plate 52.

[0050] When the ball screw 24 is running, it drives the rotating rod 55 to rotate through the second bevel tooth structure 57. Both the second bevel tooth structure 57 and the first bevel tooth structure 38 are composed of two meshing bevel teeth, and their operation is common mechanical knowledge. The rotating rod 55 drives the connecting rod 56 to rotate through the first transmission belt structure 58. The connecting rod 56 drives one spline roller 51 to rotate through the action of the first gear 59 and the second gear 510, and drives the other spline roller 51 to rotate relative to it through the second transmission belt structure 511, so that the lifting plate 52 can move up and down reciprocally. The first transmission belt structure 58 and the second transmission belt structure 511 are both composed of two synchronous pulleys and a synchronous belt sleeved between the two synchronous pulleys, and their operation is common mechanical knowledge. This application can achieve synchronous rotation of the two spline rollers 51 by adjusting the gear parameters of the first gear 59 and the second gear 510, which is very common in the mechanical field. With the guidance and cooperation of the vertical rod 512 and the guide block 513, the lifting of the lifting plate 52 is more stable, and the reciprocating motion of the spline roller 51 is more stable.

[0051] like Figure 8 As shown, the upper and lower surface grinding mechanism 4 includes a fixed frame 41 fixed to the top of the base frame 1. A cylinder 42 is installed on the upper end of the fixed frame 41. A grinding motor 43 is installed at the output end of the cylinder 42. An upper and lower surface grinding roller 44 is installed at the output end of the grinding motor 43.

[0052] The upper and lower grinding rollers 44 are driven to rotate by the grinding motor 43 and their lifting and lowering are controlled by the cylinder 42. In conjunction with the rotation of the neck 22, the upper and lower end surfaces can be automatically ground.

Claims

1. A guitar neck polishing mechanism, comprising a base frame (1), characterized in that: The upper end of the base frame (1) is provided with a neck feeding and flipping mechanism (2), a side grinding mechanism (3) and an upper and lower surface grinding mechanism (4). The side grinding mechanism (3) includes a lifting frame (31) and a reciprocating mechanism (5) for controlling the up and down movement of the lifting frame (31). Two symmetrical moving frames (32) are slidably installed on the inner side of the lifting frame (31). Side grinding rollers (33) are rotatably installed on the inner side of the moving frame (32). Multiple first springs (34) connecting the lifting frame (31) are equidistantly installed on the outer wall. The upper end of the lifting frame (31) is provided with a driving component for controlling the relative rotation of the two side grinding rollers (33). The upper and lower end faces of the inner side of the lifting frame (31) are fixedly fitted with guide rails (35) that are slidably adapted to the moving frame (32).

2. The guitar neck polishing mechanism according to claim 1, characterized in that: The driving component includes a dual-axis motor (36) fixedly mounted on the upper end of the lifting frame (31), a fixed block (37) slidably connected to the lifting frame (31) fixedly mounted on the top of the moving frame (32), a telescopic slide rod rotatably connected to the fixed block (37) installed at the output end of the dual-axis motor (36), and a first bevel tooth structure (38) installed between the telescopic slide rod and the grinding roller (33).

3. The guitar neck polishing mechanism according to claim 2, characterized in that: The telescopic slide rod includes a rotating sleeve (39) installed at the output end of a dual-axis motor (36). A movable rod (310) is slidably arranged inside the rotating sleeve (39). Four sliding blocks (311) are installed on the circumference of one end of the movable rod (310) that extends into the rotating sleeve (39). The outer wall of the rotating sleeve (39) is provided with a groove for the sliding blocks (311) to slide back and forth.

4. The guitar neck polishing mechanism according to claim 2, characterized in that: The neck feeding and flipping mechanism (2) includes a neck placement frame (21) mounted on the base frame (1) and a screw structure that drives the neck placement frame (21) to slide left and right. The upper end face of the neck placement frame (21) is equipped with a neck (22) and a positioning structure for installing and flipping the neck (22).

5. A guitar neck polishing mechanism according to claim 4, characterized in that: The screw structure includes a drive motor (23) installed on the left end face of the base frame (1), and a ball screw (24) threadedly connected to the neck support frame (21) is installed at the output end of the drive motor (23). A guide rod (25) slidably connected to the neck support frame (21) is installed above the ball screw (24) on the base frame (1).

6. The guitar neck polishing mechanism according to claim 4, characterized in that: The positioning structure includes a flip motor (26) installed on one side of the top of the neck support (21). The output end of the flip motor (26) is equipped with a first limiting frame (27) adapted to one end of the neck (22). A movable seat (28) is slidably arranged on the neck support (21) on the other side. A second spring (29) connected to the neck support (21) is installed on the inner side of the movable seat (28), and a second limiting frame (210) adapted to the other end of the neck (22) is rotatably connected to the outside.

7. A guitar neck polishing mechanism according to claim 5, characterized in that: The reciprocating mechanism (5) includes two spline rollers (51) rotatably mounted on the top of the base frame (1) and a lifting plate (52) slidably mounted between the two spline rollers (51). The lifting plate (52) is fixedly mounted on the bottom of the lifting frame (31). Lifting protrusions (53) are provided on both the front and rear side walls of the lifting plate (52). The outer wall of the spline roller (51) is provided with a track groove (54) for the lifting protrusions (53) to slide up and down. A linkage component is provided between the screw structure and the reciprocating mechanism (5).

8. A guitar neck polishing mechanism according to claim 7, characterized in that: The linkage component includes a rotating rod (55) and a connecting rod (56) rotatably mounted on the base frame (1). A second bevel gear structure (57) is installed between the rotating rod (55) and the ball screw (24), and a first transmission belt structure (58) is installed between the rotating rod (55) and the connecting rod (56). A first gear (59) is installed at the lower end of the connecting rod (56). A second gear (510) that meshes with the first gear (59) is installed at the lower end of the spline roller (51) located on one side of the connecting rod (56). A second transmission belt structure (511) is installed between the bottom of the connecting rod (56) and another spline roller (51).

9. A guitar neck polishing mechanism according to claim 8, characterized in that: The top of the base frame (1) is fixedly equipped with four vertical rods (512), and both sides of the end of the lifting plate (52) are fixedly equipped with guide blocks (513) that are slidably connected to the vertical rods (512).

10. A guitar neck polishing mechanism according to claim 1, characterized in that: The upper and lower surface grinding mechanism (4) includes a fixed frame (41) fixed to the top of the base frame (1), a cylinder (42) is installed on the upper end face of the fixed frame (41), a grinding motor (43) is installed at the output end of the cylinder (42), and an upper and lower surface grinding roller (44) is installed at the output end of the grinding motor (43).

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