Cutting head with adjustable thread wheel position

Abstract

The present application relates to the technical field of cutting device, especially to a cutting head with adjustable wire wheel position, comprising a plurality of wheel body units, each of which comprises a wheel body assembly, the wheel body assembly comprises a screw shaft, a sliding gear, a wire wheel, a first gear and a machine base, the sliding gear is in engagement with the first gear, a first rotating driving element can selectively drive the first gear to rotate forward or reverse, the sliding gear is driven to rotate by the first gear, at the same time, the sliding gear is in thread cooperation with the screw shaft to make itself slide along the screw shaft in the axial direction, thereby changing the axial position of the wire wheel relative to the screw shaft, the beneficial effect is to realize the automatic adjustment of the axial position of the wire wheel, compared with the manual adjustment mode in the prior art, the adjustment efficiency and the adjustment accuracy are greatly improved, the cutting efficiency of the machine tool using the cutting head for the silicon rod is improved, and the working strength of the laborer is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of cutting devices, and more particularly to a cutting head with an adjustable spool position. Background Technology

[0002] When squaring silicon rods, the required squaring dimensions vary depending on the rod's diameter. Therefore, the cutting line of the cutting head needs to be adjusted to the appropriate position to obtain the desired silicon rod size.

[0003] In the prior art, in order to adjust the position of the cutting line, it is necessary to adjust the position of the wire wheel. However, the existing method of adjusting the position of the wire wheel is manual, which causes the cutting process to be interrupted. The manual adjustment method has low precision and efficiency, which is not conducive to improving the efficiency of silicon rod squaring. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a cutting head with adjustable wire wheel position, which solves the technical problem that the accuracy and efficiency of manually adjusting the wire wheel position and thus adjusting the cutting line position are low, which is not conducive to improving the efficiency of silicon rod squaring.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, the present invention provides a cutting head with an adjustable spool position, comprising multiple wheel units, each wheel unit including a wheel assembly. Each wheel assembly includes a lead screw, a sliding gear, a spool, a first gear, and a base, all with parallel axes. The lead screw is fixedly connected to the base, and the first gear is rotatably connected to the base. The sliding gear is coaxially threadedly connected to the lead screw. The sliding gear meshes with the first gear. The spool is coaxially rotatably connected to the outer circumference of the sliding gear, and the spool is axially fixed relative to the sliding gear. A cutting line is suitable for being set on the spool. The wheel assembly also includes a first rotational drive member driven by the first gear. The first rotational drive member can selectively drive the first gear to rotate in both directions, causing the sliding gear to rotate while simultaneously engaging with the lead screw thread to slide along the lead screw axis, thereby causing the spool to slide axially relative to the lead screw.

[0009] In one technical solution of the present invention, a wheel body unit includes two sets of wheel body assemblies symmetrically arranged along the vertical line of the lead screw axis; the two wheel body assemblies of the same wheel body unit share a lead screw.

[0010] In one technical solution of the present invention, the wheel body unit is configured with at least three types, namely, a driving wheel unit, a guide wheel unit, and a tension wheel unit. The three wheel body units together with the cutting line form a cutting assembly. The guide wheel units are configured as two adjacent to the driving wheel unit. The grooves of the thread wheels corresponding to the wheel body assembly on the same side are in the same plane. The cutting head also includes a cutting line, which is connected end to end and is located in the grooves of all the thread wheels on the same side, and is linked to the thread wheels on the same side.

[0011] In one technical solution of the present invention, the tension wheel unit further includes a tension arm and a tension motor. One end of the tension arm is driven and connected to the tension motor. The tension wheel unit is supported on the tension arm so that the tension motor can drive the tension wheel unit to swing along the first axis through the tension arm to achieve tensioning of the cutting wire. The first axis is parallel to the rotation axis of the wire wheel.

[0012] In one technical solution of the present invention, in a cutting assembly, the cutting line between the drive wheel unit and the drive wheel unit forms a cutting segment; the cutting assembly is configured as two, and the cutting segments corresponding to the two cutting assemblies are perpendicular to each other to form a grid shape.

[0013] In one technical solution of the present invention, the driving wheel unit further includes a second rotation driving member, and the wheel of the driving wheel unit is drivenly connected to the second rotation driving member.

[0014] In one technical solution of the present invention, the two wheel assemblies corresponding to one drive wheel unit share the same second rotation drive component.

[0015] In one technical solution of the present invention, the driving pulley unit further includes a second transmission assembly, which includes a driven synchronous pulley fixedly connected to the corresponding pulley, a driving synchronous pulley driven and connected to the driving end of the second rotation driving member, and a synchronous belt driving and connecting the driving synchronous pulley and the driven synchronous pulley; when the driven synchronous pulley slides axially with the corresponding pulley, both the driving synchronous pulley and the driven synchronous pulley also maintain cooperation with the synchronous belt; the width of the groove of the driving pulley is greater than the width of the synchronous belt, so that the synchronous belt can slide axially within the groove of the driving pulley.

[0016] In one technical solution of the present invention, the wheel assembly further includes a first transmission assembly that drives and connects the first rotation drive member and the first gear. The first transmission assembly includes a second gear and a third gear with their axes parallel to each other. The third gear is fixedly connected to the drive end of the first rotation drive member. The second gear has a driving gear portion and a driven gear portion. The driven gear portion of the second gear meshes with the third gear, and the driving gear portion of the second gear meshes with the first gear. The transmission ratio between the third gear and the second gear, and between the second gear and the first gear, is greater than 1.

[0017] (III) Beneficial Effects

[0018] The beneficial effects of this invention are as follows: The adjustable thread sheave cutting head of this invention has a lead screw fixedly connected to the machine base, serving as the track for the sliding gear. The sliding gear is coaxially threaded onto the lead screw. When the sliding gear rotates, it moves axially along the lead screw due to the action of the thread. The thread sheave is coaxially rotatably connected to the outer circumference of the sliding gear, so the movement of the sliding gear will drive the thread sheave to move together. When the first gear rotates, due to its meshing relationship with the sliding gear, it will drive the sliding gear to rotate together. While rotating, the sliding gear slides axially along the lead screw due to its threaded engagement with the lead screw. This sliding changes the axial position of the thread sheave relative to the lead screw, thereby achieving adjustment of the cutting line position on the thread sheave.

[0019] The threaded engagement of the lead screw and sliding gear allows for precise adjustment of the sheave position, meeting the cutting requirements of different sizes of silicon rods at different cutting positions. The overall sheave assembly has a relatively simple structure, making it easy to manufacture and maintain. The meshing relationship between the first gear and the sliding gear ensures the stability and reliability of the transmission. Because the sheave position can be adjusted, this cutting head can adapt to workpieces of different sizes and shapes, improving cutting flexibility and efficiency.

[0020] This invention enables automatic adjustment of the shear axis position, which greatly improves adjustment efficiency and accuracy compared to the manual adjustment method in the prior art. It also improves the cutting efficiency of machine tools using this cutting head for silicon rods and reduces the workload of workers. Attached Figure Description

[0021] Figure 1 This is one of the structural schematic diagrams of the active wheel unit of the present invention;

[0022] Figure 2 This is the second schematic diagram of the structure of the drive wheel unit of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the wheel unit of the present invention;

[0024] Figure 4 This is a schematic diagram of the tension wheel unit of the present invention;

[0025] Figure 5 For the present invention Figure 1 A magnified schematic diagram of the local structure at point X;

[0026] Figure 6 This is a schematic diagram of the cutting assembly of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of two cutting assemblies that form a grid-like layout of cutting lines according to the present invention.

[0028] [Explanation of Labels in the Attached Image]

[0029] 1. Lead screw;

[0030] 2. Sliding gear;

[0031] 3. Thread reel;

[0032] 4. First gear;

[0033] 5. First rotational drive component;

[0034] A. Cutting line;

[0035] B. Vertical board;

[0036] 6. Tension arm;

[0037] 7. Tension motor;

[0038] 8. Base;

[0039] 9. Second rotation drive component;

[0040] 10. First transmission assembly; 101. Second gear; 102. Third gear;

[0041] 11. Second transmission assembly; 111. Driven synchronous pulley; 112. Driving synchronous pulley; 113. Synchronous belt.

[0042] 100. Drive wheel unit; 200. Passing wheel unit; 300. Tension wheel unit; 400. Cutting section; Detailed Implementation

[0043] To better explain and facilitate understanding of this invention, the following description is provided in conjunction with the appendix. Figures 1-7 The present invention will be described in detail through specific embodiments. In this document, directional terms such as "up" and "down" are used with reference to the orientation shown in Figure X.

[0044] Example 1:

[0045] Reference Figures 1-7An embodiment of the present invention provides a cutting head with an adjustable spool position, comprising multiple wheel units, each wheel unit including a wheel assembly. The wheel assembly includes a lead screw 1, a sliding gear 2, a spool 3, a first gear 4, and a base 8, all with parallel axes. The lead screw 1 is fixedly connected to the base 8, and the first gear 4 is rotatably connected to the base 8. The sliding gear 2 is coaxially threadedly connected to the lead screw 1. The sliding gear 2 and the first gear 4 are meshed. The spool 3 is coaxially rotatably connected to the outer periphery of the sliding gear 2, and the spool 3 is axially fixed relative to the sliding gear 2. A cutting line A is suitable for being set on the spool 3. The wheel assembly also includes a first rotation drive member 5 driven by the first gear 4. The first rotation drive member 5 can selectively drive the first gear 4 to rotate in both directions, so that while the sliding gear 2 is driven to rotate by the first gear 4, it also slides along the axial direction of the lead screw 1 through threaded engagement, thereby causing the spool 3 to slide relative to the lead screw 1.

[0046] In this embodiment, the lead screw 1 is fixedly connected to the base 8, serving as the track for the sliding gear 2. The sliding gear 2 is coaxially threaded onto the lead screw 1. When the sliding gear 2 rotates, it moves axially along the lead screw 1 due to the action of the thread. The threaded sheave 3 is coaxially rotatably connected to the outer circumference of the sliding gear 2, so the movement of the sliding gear 2 will drive the threaded sheave 3 to move together. When the first gear 4 rotates, due to its meshing relationship with the sliding gear 2, it will drive the sliding gear 2 to rotate together. While rotating, the sliding gear 2 will slide axially along the lead screw 1 due to its threaded engagement with the lead screw 1. This sliding will change the axial position of the threaded sheave 3 relative to the lead screw 1, thereby adjusting the position of the cutting line A on the threaded sheave 3.

[0047] The threaded engagement of the lead screw 1 and the sliding gear 2 allows for precise adjustment of the position of the threaded wheel 3, meeting the cutting requirements of different sizes of silicon rods at different cutting positions. The entire wheel assembly has a relatively simple structure, making it easy to manufacture and maintain. The meshing relationship between the first gear 4 and the sliding gear 2 ensures the stability and reliability of the transmission. Because the position of the threaded wheel 3 can be adjusted, this cutting head can adapt to workpieces of different sizes and shapes, improving cutting flexibility and efficiency.

[0048] This invention enables automatic adjustment of the axis position of the spool 3. Compared with the manual adjustment method in the prior art, it greatly improves the adjustment efficiency and accuracy, increases the cutting efficiency of the machine tool using this cutting head for silicon rods, and reduces the labor intensity of workers.

[0049] Specifically, the first rotation drive 5 can be configured as a servo motor capable of forward and reverse rotation, or two first transmission drive components can be configured, with one first rotation drive 5 driving the first gear 4 to rotate forward and the other first rotation drive 5 driving the first gear 4 to rotate in reverse.

[0050] A bearing is provided between the spool 3 and the sliding gear 2. Specifically, the sliding gear 2 includes an axially extending sleeve portion, and the spool 3 is rotatably connected to the outside of the sleeve portion. The axial position of the spool 3 relative to the sleeve portion is fixed.

[0051] Example 2:

[0052] Reference Figures 1-7 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0053] A wheel unit includes two sets of wheel assemblies symmetrical about the vertical line along the axis of the lead screw 1; the two wheel assemblies of the same wheel unit share a lead screw 1.

[0054] The two wheel assembly shares a lead screw 1, which can improve the integrity and stability of the wheel unit. At the same time, the same lead screw can better ensure that the axes of the two thread wheels 3 are in a coincident state, thereby improving the performance of the cutting head.

[0055] Example 3:

[0056] Reference Figures 1-7 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0057] The wheel unit is configured with at least three types: a drive wheel unit 100, a guide wheel unit 200, and a tension wheel unit 300. These three wheel units, together with the cutting line A, form a cutting assembly. The guide wheel units 200 are configured as two adjacent to the drive wheel unit 100. The tension wheel unit 300 also includes a tension arm 6 and a tension motor 7. One end of the tension arm 6 is driven and connected to the tension motor 7. The tension wheel unit 300 is supported on the tension arm 6 so that the tension motor 7 can drive the tension wheel unit 300 to swing along the first axis through the tension arm 6, thereby achieving tensioning of the cutting line A. The first axis is parallel to the rotation axis of the thread wheel 3.

[0058] In this embodiment, the feed wheel units 200 are arranged in pairs adjacent to the drive wheel unit 100, so that the drive wheel unit 100, driven wheel unit, and tension wheel unit 300 form a stable four-point layout, which can improve the stability of the cutting line A during operation, thereby improving the cutting effect of the silicon rod. At the same time, each unit contains a wheel body unit with the same structure, so it can achieve efficient automatic adjustment of the axial position of the feed wheel 3. Together with the two vertically arranged cutting assemblies, a grid-shaped cutting pattern can be formed, thus ensuring that the cutting assembly has high adjustment efficiency.

[0059] The tension wheel unit 300 includes a tension arm 6, a tension motor 7, and a tension wheel supported on the tension arm 6. The tension motor 7 drives the tension arm 6 to oscillate along a first axis, that is, an axis parallel to the rotation axis of the thread wheel 3, thereby adjusting the position of the tension wheel. This adjustment enables precise control of the tension of the cutting thread A, ensuring the stability and efficiency of the cutting process.

[0060] The grooves of the spools 3 corresponding to the wheel assembly on the same side are in the same plane; the cutting head also includes a cutting line A, which is located in the grooves of all the spools 3 on the same side and is linked to the spools 3 on the same side.

[0061] In this embodiment, by including the two sets of wheel components in one wheel unit, the cutting head is equipped with at least two parallel cutting lines A. In this way, the two wheels of each wheel unit can be precisely pitched by electrically controlling the first rotation drive to operate, and the distance between the two wheels 3 can be adjusted. The two parallel cutting lines A can be used simultaneously to cut the two opposite sides of the silicon rod, thereby ensuring the adjustment efficiency and accuracy of the cutting line A position of the cutting head.

[0062] Example 4:

[0063] Reference Figures 1-7 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0064] In a cutting assembly, the cutting line A between the drive wheel unit 100 and the drive wheel unit 200 forms a cutting segment 400; there are two cutting assemblies, and the cutting segments 400 corresponding to the two cutting assemblies are perpendicular to each other to form a grid shape.

[0065] In this embodiment, since each unit forming the cutting assembly contains a wheel assembly with the same structure, the axial position of all the wire wheels 3 can be adjusted efficiently and accurately. Consequently, the spacing between the relative cutting segments 400 can be flexibly adjusted, enabling the two cutting assemblies to simultaneously complete the squaring operation of the four sides of the silicon rod, greatly improving the squaring efficiency of the silicon rod.

[0066] Example 5:

[0067] Reference Figures 1-7 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0068] The driving pulley unit 100 also includes a second rotational drive member 9, and the pulley 3 of the driving pulley unit 100 is drivenly connected to the second rotational drive member 9. Two pulley assemblies corresponding to one driving pulley unit 100 share the same second rotational drive member 9. The driving pulley unit 100 also includes a second transmission assembly 11, which includes a driven synchronous pulley 111 fixedly connected to the corresponding pulley 3, a driving synchronous pulley 112 driven and connected to the driving end of the second rotational drive member 9, and a synchronous belt 113 driving and connecting the driving synchronous pulley 112 and the driven synchronous pulley 111. When the driven synchronous pulley 111 slides axially with the corresponding pulley 3, both the driving synchronous pulley 112 and the driven synchronous pulley 111 also maintain engagement with the synchronous belt 113. The groove width of the driving pulley is greater than the width of the synchronous belt 113, so that the synchronous belt 113 can slide axially within the groove of the driving pulley.

[0069] In this embodiment, the second rotation drive 9 is the power source of the reel 3 in the drive wheel unit 100, and it can be set as a motor.

[0070] Driven synchronous pulley 111 rotates and slides axially together with reel 3. Synchronous belt 113 is used to transmit power and maintain synchronization. When the second rotary drive 9 operates, it drives the driving synchronous pulley 112 to rotate. The driving synchronous pulley 112 transmits power to the driven synchronous pulley 111 via synchronous belt 113, and the driven synchronous pulley 111 then drives the reel 3 to rotate. Because the driven synchronous pulley 111 is fixedly connected to the reel 3, the rotational speed of the reel 3 is consistent with that of the driving synchronous pulley 112.

[0071] When the spool 3 slides axially on the lead screw 1, the driven synchronous pulley 111 also slides accordingly. Because the groove width of the driving pulley is greater than the width of the synchronous belt 113, the driving synchronous pulley 112 and the synchronous belt 113 always maintain a proper fit regardless of the position of the spool 3. This ensures that the spool 3 maintains a stable rotational speed and power transmission during sliding, adapting to the axial sliding operation of the spool 3.

[0072] The two wheel assemblies corresponding to one drive wheel unit 100 can share the same second rotation drive component 9. This means that the two pulleys 3 can be driven by the same power source, thereby simplifying the structure and reducing costs. Specifically, the two drive wheels can be fixedly connected to the output shaft of a motor.

[0073] Example 6:

[0074] Reference Figures 1-7 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0075] The wheel assembly also includes a first transmission assembly 10 that drives the first rotating drive member 5 and the first gear 4. The first transmission assembly 10 includes a second gear 101 and a third gear 102 with parallel axes. The third gear 102 is fixedly connected to the drive end of the first rotating drive member 5. The second gear 101 has a driving gear part and a driven gear part. The driven gear part of the second gear 101 meshes with the third gear 102, and the driving gear part of the second gear 101 meshes with the first gear 4. The transmission ratio between the third gear 102 and the second gear 101, and between the second gear 101 and the first gear 4, is greater than 1. The tooth thickness of the sliding gear 2 is smaller than the tooth thickness of the first gear 4, so that the sliding gear 2 can maintain meshing with the first gear 4 when sliding axially.

[0076] In this embodiment, the first transmission assembly 10 transmits the power of the first rotary drive 5 to the first gear 4, thereby driving the sliding gear 2 and the reel 3 to move. The third gear 102 serves as the power input gear, and the second gear 101 can adjust the transmission ratio while transmitting power. The transmission ratios between the third gear 102 and the second gear 101, as well as between the second gear 101 and the first gear 4, are both greater than 1. This means that the rotational speed of the first rotary drive 5 is reduced before being transmitted to the first gear 4, thus achieving speed reduction and torque increase. Simultaneously, the parallel shaft transmission scheme allows the reel 3 and the first rotary drive 5 to maintain a certain distance, enabling the first rotary drive 5 to better accommodate the axial sliding of the reel 3. By increasing the transmission ratio, the first rotary drive 5 can drive a heavier load with less power, improving the system's efficiency and stability.

[0077] Since the sliding gear 2 needs to move on the lead screw 1, if its tooth thickness is the same as or greater than that of the first gear 4, it will cause disengagement from the first gear 4 or generate excessive frictional resistance during movement. The fact that the tooth thickness of the sliding gear 2 is smaller than that of the first gear 4 ensures that the sliding gear 2 maintains meshing with the first gear 4 during axial sliding, making its movement smoother and maintaining stable meshing with the first gear 4, thus ensuring the continuity and reliability of the transmission.

[0078] It can be understood that, except for conflicting parts, the above embodiments 1-6 can be freely combined to form other embodiments of the present invention.

[0079] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0082] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0083] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A cutting head with adjustable spool position, characterized in that: It includes multiple wheel units, each of which includes a wheel assembly. The wheel assembly includes a lead screw (1) with parallel axes, a sliding gear (2), a spool (3), a first gear (4), and a base (8). The lead screw (1) is fixedly connected to the machine base (8), and the first gear (4) is rotatably connected to the machine base (8); the sliding gear (2) is coaxially threaded to the lead screw (1); the sliding gear (2) and the first gear (4) are meshed; the spool (3) is coaxially rotatably connected to the outer circumference of the sliding gear (2), and the spool (3) is axially fixed relative to the sliding gear (2), and the spool (3) is suitable for setting a cutting line (A); The wheel assembly also includes a first rotation drive (5) that is driven to the first gear (4); the first rotation drive (5) can selectively drive the first gear (4) to rotate in both directions, so that the sliding gear (2) is driven to rotate by the first gear (4) and simultaneously engages with the lead screw (1) to slide along the axial direction of the lead screw (1), thereby driving the spool (3) to slide axially relative to the lead screw (1); The sliding gear (2) includes an axially extending sleeve portion, the spool (3) is rotatably connected to the outside of the sleeve portion, and the spool (3) is fixed in axial position relative to the sleeve portion; The wheel unit can be a drive wheel unit (100). The active wheel unit (100) further includes a second rotation drive (9), and the spool (3) of the active wheel unit (100) is drivenly connected to the second rotation drive (9); The drive wheel unit (100) further includes a second transmission assembly (11), which includes a driven synchronous wheel (111) fixedly connected to the corresponding spool (3), a drive synchronous wheel (112) driven and connected to the drive end of the second rotation drive member (9), and a synchronous belt (113) driving and connecting the drive synchronous wheel (112) and the driven synchronous wheel (111). When the driven synchronous pulley (111) slides axially with the corresponding pulley (3), the driving synchronous pulley (112) and the driven synchronous pulley (111) also maintain cooperation with the synchronous belt (113); The groove width of the active synchronizing pulley (112) is greater than the width of the synchronizing belt (113), so that when the driven synchronizing pulley (111) slides axially with the pulley (3), the synchronizing belt (113) can slide axially within the groove of the active synchronizing pulley (112), thereby ensuring that the active synchronizing pulley (112) and the synchronizing belt (113) always maintain a proper fit.

2. The cutting head with adjustable spool position as described in claim 1, characterized in that: One of the wheel units includes two sets of wheel assemblies that are symmetrical about a perpendicular line along the axis of the lead screw (1); Two wheel assemblies of the same wheel unit share a lead screw (1).

3. The cutting head with adjustable spool position as described in claim 2, characterized in that: The wheel unit is configured with at least three types, namely the driving wheel unit (100), the guide wheel unit (200), and the tension wheel unit (300), and the three types of wheel units together with the cutting line (A) form a cutting assembly; The drive wheel unit (200) is configured as two adjacent to the drive wheel unit (100); The grooves of the thread wheels (3) corresponding to the wheel body assemblies on the same side are in the same plane; The cutting head also includes the cutting line (A), which is connected end to end and located in the groove of all the thread wheels (3) on the same side, and is linked to the thread wheels (3) on the same side.

4. The cutting head with adjustable spool position as described in claim 3, characterized in that: The tension wheel unit (300) also includes a tension arm (6) and a tension motor (7). One end of the tension arm (6) is driven to the tension motor (7). The tension wheel unit (300) is supported on the tension arm (6) so that the tension motor (7) can drive the tension wheel unit (300) to swing along the first axis through the tension arm (6) to tension the cutting line (A). The first axis is parallel to the rotation axis of the reel (3).

5. The cutting head with adjustable spool position as described in claim 4, characterized in that: In one of the cutting assemblies, the cutting line (A) between the drive wheel unit (100) and the drive wheel unit (200) forms a cutting segment (400). The cutting assembly is configured as two, and the cutting segments (400) corresponding to the two cutting assemblies are perpendicular to each other to form a grid shape.

6. The cutting head with adjustable spool position as described in claim 5, characterized in that: The two wheel assemblies corresponding to one of the drive wheel units (100) share the same second rotation drive (9).

7. The cutting head with adjustable spool position as described in claim 6, characterized in that: The wheel assembly also includes a first transmission assembly (10) that drives the first rotation drive (5) and the first gear (4). The first transmission assembly (10) includes a second gear (101) and a third gear (102) with parallel axes. The third gear (102) is fixedly connected to the driving end of the first rotating drive (5). The second gear (101) has a driving gear part and a driven gear part. The driven gear part of the second gear (101) meshes with the third gear (102), and the driving gear part of the second gear (101) meshes with the first gear (4). The transmission ratio between the third gear (102) and the second gear (101), and between the second gear (101) and the first gear (4), is greater than 1.

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