Pencil processing device and method

Abstract

The invention discloses a pencil processing device and method, and relates to the technical field of pencil processing, the pencil processing device comprises a protective barrel, and a grooving mechanism is axially arranged in the protective barrel and used for processing a pencil holding groove; a rotation driving mechanism is arranged at the rear end in the protection barrel and used for fixing the rear end of the pencil and driving the pencil to revolve along the grooving mechanism; and a rotation guide mechanism is arranged at the front end in the protection barrel and used for fixing the front end of the pencil and guiding the pencil to rotate in the revolution process. The two ends of the pencil are fixed through the rotation driving mechanism and the rotation guiding mechanism, the pencil rotates in the revolution process along the grooving mechanism, the three faces of the pencil make contact with the grooving mechanism, grooving of the three faces of the pencil is completed, manual pencil rotation is not needed, automatic machining is achieved, and the working efficiency and grooving precision are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of pencil processing, and in particular to a pencil processing device and method. Background Art

[0002] Currently, pencils on the market are basically cylindrical or polygonal, and have a complete surface. Considering the posture of fingers holding a pencil, three-sided holding grooves are opened on the pencil, which is more in line with the ergonomics of fingers holding a pencil, so that the fingertips hold the holding grooves on the surface of the pencil, which will be more firm and comfortable.

[0003] The pencil slotting device in the current technology can only slot one side of the pencil. After the single side is slotted, the angle of the pencil is manually adjusted to slot other sides. The above process is cumbersome, the processing time is long, and the slotting accuracy is low. Summary of the invention

[0004] In view of this, the present invention provides a pencil processing device and method to solve the problems raised in the above background technology, and specifically discloses the following contents:

[0005] A pencil processing device comprises a protective tube, wherein a slotting mechanism is axially arranged inside the protective tube for processing a pencil holding groove; a rotation driving mechanism is arranged at the rear end inside the protective tube for fixing the rear end of the pencil and driving the pencil to revolve along the slotting mechanism; a rotation guiding mechanism is arranged at the front end inside the protective tube for fixing the front end of the pencil and guiding the pencil to rotate during the revolving process.

[0006] Furthermore, the grooving mechanism includes a knife shaft, a front cover is fixedly provided at the front end of the protective tube, and a rear cover is fixedly provided at the rear end, the front end of the knife shaft is fixedly arranged at the center position of the rear end of the front cover, and the rear end of the knife shaft is fixedly arranged at the center position of the front end of the rear cover, and the knife shaft is evenly provided with three groups of knife assemblies along the circumference, and the knife assembly includes a first knife unit, a second knife unit and a third knife unit which are arranged in sequence from front to back.

[0007] Further, the rotation drive mechanism comprises a rear rotating ring, the rear rotating ring is sleeved on the rear end of the knife shaft, the rear rotating ring is rotatably connected to the knife shaft, the rear cover is provided with a rear rotating groove adapted to the rear rotating ring, and the rear end of the rear rotating ring is rotatably connected to the rear rotating groove;

[0008] The circumferential wall of the rear rotating ring is provided with driving teeth, the front end of the bottom of the protective tube is fixedly connected to the front support seat, and the rear end is fixedly connected to the rear support seat, the rear support seat is provided with a driving groove connected to the interior of the protective tube, a driving motor is provided in the driving groove, and the output end of the driving motor is fixedly connected to a driving gear, and the driving gear is meshed with the driving teeth;

[0009] The rear rotating ring is evenly provided with a plurality of rear connecting holes along the circumferential direction, and a rear fixing piece is rotatably connected in the rear connecting hole, and the rear fixing piece is used to fix the rear end of the pencil.

[0010] Furthermore, the front end of the rear fixing member is open, and the rear end is detachably connected with a rear card cover, and the rear card cover is adapted to the rear end of the pencil and is used to limit the axial displacement of the pencil.

[0011] Further, the rotation guide mechanism comprises a front rotating ring, the front rotating ring is sleeved on the front end of the knife shaft, and the front rotating ring is rotationally connected to the knife shaft;

[0012] The front rotating ring is evenly provided with a plurality of front connecting holes along the circumferential direction, the front connecting holes are arranged correspondingly to the rear connecting holes, a front fixing piece is rotatably connected in the front connecting hole, and the front fixing piece is used to fix the front end of the pencil;

[0013] The rear end of the front fixing piece is opened, and the front end is fixedly connected to a front connecting shaft, and the front end of the front connecting shaft is fixedly connected to a front guide gear; the inner wall of the protective tube is provided with smooth sections and guide tooth sections at intervals along the circumferential direction, and the number of the smooth sections and the guide tooth sections are both three groups, the smooth sections are arranged corresponding to the tool assemblies, and the guide tooth sections are meshedly connected with the front guide gears, so as to drive the front fixing piece to rotate and replace the contact surface between the pencil and the next group of the tool assemblies.

[0014] Furthermore, a positioning block adapted to the positioning groove at the front end of the pencil is provided in the front fixing member.

[0015] Furthermore, a front ring groove communicating with the front connecting hole is provided in the front rotating ring, a front ratchet is provided on the circumferential wall of the front fixing member, and a front ratchet corresponding to the front ratchet is provided on the front ring groove to prevent the front fixing member from reversing;

[0016] A rear annular groove communicating with the rear connecting hole is provided in the rear rotating ring, a rear ratchet is provided on the circumferential wall of the rear fixing member, and a rear pawl corresponding to the rear ratchet is provided on the rear annular groove to prevent the rear fixing member from reversing.

[0017] A pencil processing method is implemented using any of the pencil processing devices described above, and specifically comprises the following steps:

[0018] S1: Processing a positioning groove on the front end of an ordinary pencil;

[0019] S2: Open the rear card cover, insert the front end of the pencil through the rear fixing piece and into the front fixing piece, so that the positioning groove matches the positioning block. After the pencil is fully inserted, install the rear card cover;

[0020] S3: Turn on the driving motor, the driving gear meshes with the driving teeth on the rear rotating ring, the rear rotating ring drives the pencil to revolve along the knife axis, and the knife assembly is turned on at the same time;

[0021] S4: The rear rotating ring rotates, driving the pencil and the front rotating ring to rotate together. When the front guide gear passes through the first group of smooth sections, the pencil does not rotate. The first group of tool components processes the holding groove on the first side of the pencil. The front guide gear passes through the first group of guide tooth sections, and the pencil rotates. When the front guide gear passes through the second group of smooth sections, the pencil does not rotate. The second group of tool components processes the holding groove on the second side of the pencil. When the front guide gear passes through the second group of guide tooth sections, the pencil rotates. When the front guide gear passes through the third group of smooth sections, the pencil does not rotate. The third group of tool components processes the holding groove on the third side of the pencil. After the front guide gear passes through the third group of guide tooth sections, the pencil rotates back to its original position. The first side, the second side and the third side of the pencil are evenly distributed along the axis of the pencil.

[0022] S5: repeat step S4 until the three sides of the pencil are grooved;

[0023] S6: Turn off the drive motor and the cutter assembly, open the rear cover, take out the pencil, and cut off the portion with the positioning groove at the front end of the pencil.

[0024] Furthermore, the gripping groove includes a strip groove, a first spherical groove and a second spherical groove which are arranged in sequence from front to back.

[0025] Further, the length of the pencil is 160-180 mm, and the diameter is 8-10 mm; the length of the strip groove section is 60-70 mm, and the width is 5-6 mm; the diameter of the first spherical groove section is 5-6 mm, and the diameter of the second spherical groove section is 5-6 mm;

[0026] Along the length direction of the pencil, the distance between the strip groove and the first spherical groove is 12-14 mm, and the distance between the first spherical groove and the second spherical groove is 12-14 mm.

[0027] The beneficial effects of the present invention are:

[0028] The present invention fixes two ends of a pencil by a rotating driving mechanism and a rotating guiding mechanism, and enables the pencil to realize self-rotation during the process of orbiting along the slotting mechanism, so that three sides of the pencil are in contact with the slotting mechanism, and slotting of the three sides of the pencil is completed. Manual rotation of the pencil is unnecessary, and automatic processing is realized, thereby greatly improving work efficiency and slotting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 The figure is a side view of a pencil processing device according to the present invention.

[0031] Figure 2 The figure is a rear view of a pencil processing device according to the present invention.

[0032] Figure 3 for Figure 1 Sectional view of AA.

[0033] Figure 4 for Figure 1 Cross-sectional view of BB.

[0034] Figure 5 It is a structural schematic diagram of the rotation guide mechanism.

[0035] Figure 6 It is a schematic diagram of the connection between the rotation guide mechanism, the slotting mechanism and the rotation drive mechanism.

[0036] Figure 7 for Figure 6 Cross-sectional view of CC.

[0037] Figure 8 for Figure 7 Enlarged view of point D in the middle.

[0038] Fig. 9 This is a schematic diagram of the pencil structure after processing.

[0039] Fig.10 It is a structural schematic diagram of the positioning groove.

[0040] Fig.11 This is a schematic diagram of the structure of a pencil after being sharpened.

[0041] Among them, in the figure:

[0042] 11-protective tube; 111-guide tooth segment; 112-smooth segment; 12-front cover; 13-rear cover; 131-rear rotating groove; 21-front support seat; 22-rear support seat; 221-driving groove; 222-driving gear; 3-front rotating ring; 31-front connecting hole; 32-front ring groove; 321-front ratchet; 4-front fixing piece; 41-front connecting shaft; 42-front guide gear; 43-front ratchet; 5-knife shaft; 51-first tool unit; 52-second tool unit; 53-third tool unit; 6-rear rotating ring; 61-rear connecting hole; 62-driving tooth; 7-rear fixing piece; 71-rear card cover; 8-pencil; 81-positioning groove; 82-strip groove; 83-first spherical groove; 84-second spherical groove. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0044] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or components is not necessarily limited to those steps or components that are clearly listed, but may include other steps or components that are not clearly listed or inherent to these processes, methods, products or devices.

[0045] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0046] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0047] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] See attached Figure 1-11 The present invention discloses a pencil processing device, including a protective tube 11. A slotting mechanism is axially arranged inside the protective tube 11 for processing a pencil 8 holding groove; a rotation driving mechanism is arranged at the rear end of the protective tube 11 for fixing the rear end of the pencil 8 and driving the pencil 8 to revolve along the slotting mechanism; a rotation guiding mechanism is arranged at the front end of the protective tube 11 for fixing the front end of the pencil 8 and guiding the pencil 8 to rotate during the revolving process.

[0049] In this embodiment, the two ends of the pencil 8 are fixed by a rotating driving mechanism and a rotating guiding mechanism, and the pencil 8 is made to rotate while revolving along the groove opening mechanism, so that the three sides of the pencil are in contact with the groove opening mechanism, and the three sides of the pencil are grooved. There is no need to manually rotate the pencil, and automatic processing is realized, which greatly improves the work efficiency and groove opening accuracy.

[0050] The grooving mechanism includes a knife shaft 5, a front cover 12 is fixedly provided at the front end of the protective tube 11, and a rear cover 13 is fixedly provided at the rear end. The front end of the knife shaft 5 is fixedly arranged at the center position of the rear end of the front cover 12, and the rear end of the knife shaft 5 is fixedly arranged at the center position of the front end of the rear cover 13. The knife shaft 5 is evenly arranged with three groups of knife assemblies along the circumferential direction, and the knife assemblies include a first knife unit 51, a second knife unit 52 and a third knife unit 53 which are arranged in sequence from front to back.

[0051] In this embodiment, the first tool unit 51, the second tool unit 52 and the third tool unit 53 are all prior art and are not described in detail here. A tool driving mechanism is provided inside the tool shaft for driving the above tool units, which is not shown in the figure.

[0052] The rotation driving mechanism includes a rear rotating ring 6, which is sleeved on the rear end of the knife shaft 5, and the rear rotating ring 6 is rotatably connected to the knife shaft 5. The rear cover 13 is provided with a rear rotating groove 131 adapted to the rear rotating ring 6, and the rear end of the rear rotating ring 6 is rotatably connected to the rear rotating groove 131;

[0053] A driving tooth 62 is arranged on the circumferential wall of the rear rotating ring 6, the front end of the bottom of the protective tube 11 is fixedly connected to the front support seat 21, and the rear end is fixedly connected to the rear support seat 22. A driving groove 221 communicating with the interior of the protective tube 11 is arranged in the rear support seat 22, and a driving motor is arranged in the driving groove 221. A driving gear 222 is fixedly connected to the output end of the driving motor, and the driving gear 222 is meshed and connected with the driving tooth 62;

[0054] The rear rotating ring 6 is evenly provided with a plurality of rear connecting holes 61 along the circumferential direction. A rear fixing member 7 is rotatably connected in the rear connecting hole 61 . The rear fixing member 7 is used to fix the rear end of the pencil 8 .

[0055] The front end of the rear fixing member 7 is open, and the rear end is detachably connected with a rear card cover 71 . The rear card cover 71 is matched with the rear end of the pencil 8 to limit the axial displacement of the pencil 8 .

[0056] The rotation guide mechanism comprises a front rotating ring 3, which is sleeved on the front end of the knife shaft 5, and the front rotating ring 3 is rotationally connected to the knife shaft 5;

[0057] The front rotating ring 3 is evenly provided with a plurality of front connecting holes 31 along the circumferential direction, and the front connecting holes 31 are arranged correspondingly to the rear connecting holes 61. The front fixing member 4 is rotatably connected in the front connecting hole 31, and the front fixing member 4 is used to fix the front end of the pencil 8;

[0058] The front fixing part 4 is opened at the rear end, and a front connecting shaft 41 is fixedly connected at the front end, and a front guide gear 42 is fixedly connected at the front end of the front connecting shaft 41; smooth sections 112 and guide tooth sections 111 are arranged at intervals along the circumferential direction on the inner wall of the protective tube 11, and the number of the smooth sections 112 and the guide tooth sections 111 are both three groups, and the smooth sections 112 are arranged corresponding to the tool assemblies, and the guide tooth sections 111 are meshedly connected with the front guide gear 42, so as to drive the front fixing part 4 to rotate and replace the contact surface between the pencil 8 and the next group of tool assemblies.

[0059] In this embodiment, the setting of the guide tooth segment 111 can ensure that after the pencil rotates once, the contact surface between the pencil 8 and the next set of tool components is exactly the contact surface obtained by rotating the previous contact surface 120° along the axis of the pencil 8, thereby achieving uniform distribution of the holding grooves on the three sides of the pencil.

[0060] A positioning block adapted to the front positioning groove 81 of the pencil 8 is provided in the front fixing member 4 to prevent the pencil 8 and the front fixing member 4 from rotating relative to each other.

[0061] In this embodiment, the positioning block part is rectangular. In order to facilitate the operator to align the positioning block with the positioning groove 81 when inserting the pencil, a mark is provided on the rear cover corresponding to the direction of the rectangular part in the positioning groove 81 of the pencil 8 at the beginning of each rear fixing member.

[0062] A front ring groove 32 communicating with the front connecting hole 31 is provided in the front rotating ring 3, a front ratchet 43 is provided on the circumferential wall of the front fixing member 4, and a front ratchet pawl 321 corresponding to the front ratchet 43 is provided on the front ring groove 32 to prevent the front fixing member 4 from reversing;

[0063] A rear annular groove communicating with the rear connecting hole 61 is provided in the rear rotating ring 6, a rear ratchet is provided on the circumferential wall of the rear fixing member 7, and a rear pawl corresponding to the rear ratchet is provided on the rear annular groove to prevent the rear fixing member 7 from reversing.

[0064] In this embodiment, the front ratchet 43 and the front pawl 321, as well as the rear ratchet and the rear pawl, are arranged to ensure that the direction of the pencil 8's self-rotation can only be the direction of rotation of the front guide gear 42 under the meshing transmission of the guide tooth segment 111, so as to avoid the pencil 8 from reversing when the tool assembly contacts the pencil 8 for grooving, and the rotation directions of the first tool unit 51, the second tool unit 52 and the third tool unit 53 are all the same as the direction of the pencil 8's self-rotation.

[0065] A pencil processing method specifically comprises the following steps:

[0066] S1: Processing a positioning groove 81 at the front end of an ordinary pencil 8;

[0067] S2: Open the rear card cover 71, insert the front end of the pencil 8 through the rear fixing member 7 and into the front fixing member 4, so that the positioning groove 81 matches the positioning block. After the pencil 8 is fully inserted, install the rear card cover 71;

[0068] S3: Turn on the driving motor, the driving gear 222 meshes with the driving teeth 62 on the rear rotating ring 6, and the rear rotating ring 6 drives the pencil 8 to revolve along the knife shaft 5, and at the same time, the knife assembly is turned on;

[0069] S4: The rear rotating ring 6 rotates, driving the pencil 8 and the front rotating ring 3 to rotate together. When the front guide gear 42 passes through the first group of smooth sections 112, the pencil 8 does not rotate by itself. The first group of tool components processes the holding groove on the first side of the pencil 8. The front guide gear 42 passes through the first group of guide tooth sections 111, and the pencil 8 rotates by itself. When the front guide gear 42 passes through the second group of smooth sections 112, the pencil 8 does not rotate by itself. The second group of tool components processes the holding groove on the second side of the pencil 8. The front guide gear 42 passes through the second group of guide tooth sections 111, and the pencil 8 rotates by itself. When the front guide gear 42 passes through the third group of smooth sections 112, the pencil 8 does not rotate by itself. The third group of tool components processes the holding groove on the third side of the pencil 8. After the front guide gear 42 passes through the third group of guide tooth sections 111, the pencil 8 rotates to restore its original position. The first side of the pencil 8, the second side of the pencil 8, and the third side of the pencil 8 are evenly distributed along the axis of the pencil 8.

[0070] S5: repeat step S4 until the three sides of the pencil 8 are grooved;

[0071] S6: Turn off the drive motor and the cutter assembly, open the rear cover 71, take out the pencil 8, and cut off the portion with the positioning groove 81 at the front end of the pencil 8.

[0072] The gripping groove includes a strip groove 82 , a first spherical groove 83 and a second spherical groove 84 which are arranged in sequence from front to back.

[0073] The length of the pencil 8 is 160-180 mm, and the diameter is 8-10 mm; the length of the cross section of the strip groove 82 is 60-70 mm, and the width is 5-6 mm; the diameter of the cross section of the first spherical groove 83 is 5-6 mm, and the diameter of the cross section of the second spherical groove 84 is 5-6 mm;

[0074] Along the length direction of the pencil 8, the distance between the strip groove 82 and the first spherical groove 83 is 12-14 mm, and the distance between the first spherical groove 83 and the second spherical groove 84 is 12-14 mm.

[0075] In this embodiment, the length of the pencil 8 is 177 mm and the diameter is 8 mm; the length of the cross section of the strip groove 82 is 65 mm and the width is 5.5 mm; the diameter of the cross section of the first spherical groove 83 is 5.5 mm and the diameter of the cross section of the second spherical groove 84 is 5.5 mm;

[0076] Along the length direction of the pencil 8, the distance between the strip groove 82 and the first spherical groove 83 is 13.65 mm, and the distance between the first spherical groove 83 and the second spherical groove 84 is 13.65 mm.

[0077] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pencil processing device, It is characterized in that The protective tube (11) comprises a protective tube (11), wherein a slotting mechanism is axially arranged inside the protective tube (11) for processing a pencil (8) holding groove; a rotation driving mechanism is arranged at the rear end inside the protective tube (11) for fixing the rear end of the pencil (8) and driving the pencil (8) to revolve along the slotting mechanism; and a rotation guiding mechanism is arranged at the front end inside the protective tube (11) for fixing the front end of the pencil (8) and guiding the pencil (8) to rotate during the revolving process.

2. A pencil processing device according to claim 1, It is characterized in that The grooving mechanism comprises a knife shaft (5), a front cover (12) is fixedly provided at the front end of the protective tube (11), and a rear cover (13) is fixedly provided at the rear end, the front end of the knife shaft (5) is fixedly arranged at the center position of the rear end of the front cover (12), and the rear end of the knife shaft (5) is fixedly arranged at the center position of the front end of the rear cover (13), and the knife shaft (5) is evenly arranged with three groups of knife assemblies along the circumferential direction, and the knife assemblies comprise a first knife unit (51), a second knife unit (52) and a third knife unit (53) which are arranged in sequence from front to back.

3. A pencil processing device according to claim 2, It is characterized in that The rotation driving mechanism comprises a rear rotating ring (6), the rear rotating ring (6) is sleeved on the rear end of the knife shaft (5), the rear rotating ring (6) is rotationally connected to the knife shaft (5), the rear cover (13) is provided with a rear rotating groove (131) adapted to the rear rotating ring (6), and the rear end of the rear rotating ring (6) is rotationally connected in the rear rotating groove (131); The rear rotating ring (6) is provided with driving teeth (62) on its circumferential wall; the front end of the bottom of the protective tube (11) is fixedly connected to a front support seat (21); the rear end is fixedly connected to a rear support seat (22); a driving groove (221) communicating with the interior of the protective tube (11) is provided in the rear support seat (22); a driving motor is provided in the driving groove (221); a driving gear (222) is fixedly connected to the output end of the driving motor; the driving gear (222) is meshedly connected to the driving teeth (62); The rear rotating ring (6) is evenly provided with a plurality of rear connecting holes (61) along the circumferential direction, and a rear fixing member (7) is rotatably connected in the rear connecting hole (61), and the rear fixing member (7) is used to fix the rear end of the pencil (8).

4. A pencil processing device according to claim 3, It is characterized in that The front end of the rear fixing member (7) is open, and the rear end is detachably connected to a rear card cover (71), and the rear card cover (71) is adapted to the rear end of the pencil (8) and is used to limit the axial displacement of the pencil (8).

5. A pencil processing device according to claim 4, It is characterized in that The rotation guide mechanism comprises a front rotating ring (3), the front rotating ring (3) is sleeved on the front end of the knife shaft (5), and the front rotating ring (3) is rotationally connected to the knife shaft (5); The front rotating ring (3) is evenly provided with a plurality of front connecting holes (31) along the circumferential direction, the front connecting holes (31) are arranged corresponding to the rear connecting holes (61), a front fixing member (4) is rotatably connected in the front connecting hole (31), and the front fixing member (4) is used to fix the front end of the pencil (8); The front fixing member (4) is provided with an opening at the rear end, and a front connecting shaft (41) is fixedly connected at the front end, and a front guide gear (42) is fixedly connected at the front end of the front connecting shaft (41); the inner wall of the protective tube (11) is provided with smooth sections (112) and guide tooth sections (111) at intervals along the circumferential direction, and the number of the smooth sections (112) and the guide tooth sections (111) are both three groups, and the smooth sections (112) are provided correspondingly to the tool assembly, and the guide tooth sections (111) are meshedly connected with the front guide gear (42) for driving the front fixing member (4) to rotate and replace the contact surface between the pencil (8) and the next group of the tool assembly.

6. A pencil processing device according to claim 5, It is characterized in that The front fixing member (4) is provided with a positioning block adapted to the front end positioning groove (81) of the pencil (8).

7. A pencil processing device according to claim 6, It is characterized in that A front ring groove (32) communicating with the front connecting hole (31) is provided in the front rotating ring (3); a front ratchet (43) is provided on the circumferential wall of the front fixing member (4); a front ratchet pawl (321) corresponding to the front ratchet (43) is provided on the front ring groove (32) for preventing the front fixing member (4) from reversing; The rear rotating ring (6) is provided with a rear annular groove in communication with the rear connecting hole (61), the circumferential wall of the rear fixing member (7) is provided with a rear ratchet, and the rear annular groove is provided with a rear pawl corresponding to the rear ratchet for preventing the rear fixing member (7) from reversing.

8. A method for processing a pencil, It is characterized in that The pencil processing device according to any one of claims 1 to 7 is used to implement the process, which specifically comprises the following steps: S1: Processing a positioning groove (81) on the front end of an ordinary pencil (8); S2: Open the rear card cover (71), insert the front end of the pencil (8) through the rear fixing member (7), and extend it into the front fixing member (4), so that the positioning groove (81) and the positioning block are matched, and after the pencil (8) is fully inserted, install the rear card cover (71); S3: Turn on the driving motor, the driving gear (222) meshes with the driving teeth (62) on the rear rotating ring (6) for transmission, the rear rotating ring (6) drives the pencil (8) to revolve along the knife shaft (5), and the knife assembly is turned on at the same time; S4: The rear rotating ring (6) rotates, driving the pencil (8) and the front rotating ring (3) to rotate together. When the front guide gear (42) passes through the first group of smooth sections (112), the pencil (8) does not rotate on its own. The first group of tool components processes the holding groove on the first side of the pencil (8). The front guide gear (42) passes through the first group of guide tooth sections (111), causing the pencil (8) to rotate on its own. When the front guide gear (42) passes through the second group of smooth sections (112), the pencil (8) does not rotate on its own. The second group of tool components processes the second side of the pencil (8). The front guide gear (42) passes through the second group of guide tooth segments (111), and the pencil (8) rotates. When the front guide gear (42) passes through the third group of smooth segments (112), the pencil (8) does not rotate. The third group of tool components processes the gripping groove on the third side of the pencil (8). After the front guide gear (42) passes through the third group of guide tooth segments (111), the pencil (8) rotates to restore the initial position. The first side of the pencil (8), the second side of the pencil (8), and the third side of the pencil (8) are evenly distributed along the axis of the pencil (8); S5: repeat step S4 until the three sides of the pencil (8) are grooved; S6: Turn off the drive motor and the cutter assembly, open the rear cover (71), take out the pencil (8), and cut off the portion with the positioning groove (81) at the front end of the pencil (8).

9. A method for processing a pencil according to claim 8, It is characterized in that The gripping groove comprises a strip groove (82), a first spherical groove (83) and a second spherical groove (84) which are arranged in sequence from front to back.

10. A method for processing a pencil according to claim 9, It is characterized in that The pencil (8) has a length of 160-180 mm and a diameter of 8-10 mm; the cross-section of the strip groove (82) has a length of 60-70 mm and a width of 5-6 mm; the cross-section of the first spherical groove (83) has a diameter of 5-6 mm; and the cross-section of the second spherical groove (84) has a diameter of 5-6 mm; Along the length direction of the pencil (8), the distance between the strip groove (82) and the first spherical groove (83) is 12-14 mm, and the distance between the first spherical groove (83) and the second spherical groove (84) is 12-14 mm.

Images