Woodworking tapper

Abstract

The utility model relates to the technical field of woodworking tools, in particular to a woodworking tapper which comprises a rotating shaft, a drill bit and a limiting mechanism, one end of the rotating shaft is coaxially connected to one end of the drill bit, the limiting mechanism comprises a lantern ring, an abutting rod and a positioning assembly, the lantern ring is coaxially and slidably connected to the periphery of the rotating shaft, and one end of the abutting rod is connected to the outer wall of the lantern ring; the positioning assembly is connected to the lantern ring to achieve relative fixation of the lantern ring and the rotating shaft in the axis direction of the rotating shaft. When the woodworking tapper works, the lantern ring slides to the relative position along the axis of the rotating shaft, the positioning assembly achieves relative fixation of the lantern ring and the rotating shaft, the woodworking tapper works, when the abutting rod abuts against a product, an operator is reminded that the hole depth reaches the designated depth, the possibility that the tapping depth is too large or insufficient is reduced, and the accuracy of the woodworking tapper is improved.

Description

Technical Field

[0001] This application relates to the technical field of woodworking tools, and in particular to a woodworking hole opener. Background Technology

[0002] In daily life, people often use all kinds of wooden furniture. However, before wooden furniture is manufactured, the materials need to be processed. Various tools are used to process the materials, including woodworking hole saws, which can quickly make holes in the wood.

[0003] When processing wood, workers need to drill holes of varying depths. Existing equipment can only control the drilling depth by visually assessing it during drilling, which can easily lead to over-drilling or under-drilling, resulting in unnecessary material waste. Utility Model Content

[0004] To facilitate workers in controlling the depth of the hole and improve the accuracy of the woodworking hole saw, this application provides a woodworking hole saw.

[0005] The woodworking hole punch provided in this application adopts the following technical solution:

[0006] A woodworking hole saw includes a rotating shaft, a drill bit, and a limiting mechanism. One end of the rotating shaft is coaxially connected to one end of the drill bit. The limiting mechanism includes a collar, a retaining rod, and a positioning component. The collar is coaxially slidably connected to the outer periphery of the rotating shaft. One end of the retaining rod is connected to the outer wall of the collar. The positioning component is connected between the collar and the rotating shaft to achieve relative fixation of the collar and the rotating shaft along the axis of the rotating shaft.

[0007] By adopting the above technical solution, the collar is slid along the axis of the rotating shaft to a relative position, and the positioning component realizes the relative fixation of the collar and the rotating shaft. When the woodworking hole saw works, when the abutting rod abuts the product, it prompts the operator that the hole depth has reached the specified depth, reducing the possibility of the hole depth being too deep or too insufficient, and improving the accuracy of the woodworking hole saw.

[0008] Preferably, the limiting mechanism further includes an extension rod and a fixing bolt. The extension rod is slidably connected to the abutment rod, and the sliding direction of the extension rod is parallel to the length direction of the abutment rod. The abutment rod is provided with a plurality of connecting holes, which are spaced apart along the sliding direction of the extension rod. The fixing bolt passes through the connecting holes and is threadedly connected to the extension rod.

[0009] By adopting the above technical solution, the relative positions of the extension rod and the abutment rod can be adjusted as needed to meet the requirements of opening holes of different diameters, thereby improving the applicability of the woodworking hole opener.

[0010] Preferably, the collar is connected to a connecting seat on the side away from the drill bit, the connecting seat has an indicator arrow on its side wall, and the rotating shaft has a scale groove on its outer circumference. The indicator arrow is used to align with the scale groove.

[0011] By adopting the above technical solution and setting indicator arrows and scale grooves, it is easier for operators to quickly slide the collar to the appropriate position, thereby improving the convenience of adjusting the limit mechanism.

[0012] Preferably, a guide block is connected to the inner side of the collar, and a guide groove is provided on the outer periphery of the rotating shaft. The guide block is slidably embedded in the guide groove, and the side wall of the guide block is in contact with the groove wall of the guide groove.

[0013] By adopting the above technical solution, the guide block and the guide groove cooperate to achieve circumferential fixation of the collar and the rotating shaft, ensuring that the indicator arrow corresponds to the scale groove, making it easy for the operator to judge the relative position of the collar and the rotating shaft by aligning the indicator arrow with the scale groove, thus improving the reliability of the woodworking hole opener.

[0014] Preferably, the positioning component includes a positioning block and a first reset member. The positioning block is slidably connected to the collar, and the sliding direction of the positioning ring is perpendicular to the sliding direction of the collar. The bottom of the guide groove is provided with a plurality of positioning grooves for the positioning block to be embedded in. The plurality of positioning grooves are distributed at intervals along the sliding direction of the collar. The first reset member is connected between the positioning block and the collar, and the first reset member makes the positioning block tend to be embedded in the positioning groove.

[0015] By adopting the above technical solution, the first reset component drives the positioning block to be embedded in the positioning groove, thereby achieving relative fixation of the collar and the rotating shaft along the axis of rotation of the rotating shaft, reducing the possibility of relative sliding between the collar and the rotating shaft during use, and improving the reliability of the woodworking hole opener.

[0016] Preferably, the limiting mechanism further includes an unlocking component, which is slidably connected to the collar. The sliding direction of the unlocking component is parallel to the sliding direction of the collar. The end of the unlocking component near the positioning block is provided with a first chamfer. The first chamfer is located on the side of the unlocking component away from the rotating shaft and is used to abut against the positioning block.

[0017] By adopting the above technical solution, the unlocking part is pushed to slide, the first chamfer abuts against the positioning block, and the positioning block is pushed to overcome the elastic force of the first reset part to slide out of the positioning groove, thereby releasing the relative fixation of the collar and the rotating shaft along the axis of the rotating shaft, so that the sliding collar can realize the adjustment of the relative position of the collar and the rotating shaft, and improve the convenience of woodworking hole opener operation.

[0018] Preferably, there are several positioning blocks, which are distributed circumferentially around the axis of the sleeve. The number of the first reset components is the same as the number of positioning blocks and they correspond one-to-one. The unlocking component is ring-shaped.

[0019] By adopting the above technical solution, several positioning blocks and first reset components are provided to improve the stability of the connection between the collar and the rotating shaft. The unlocking block is ring-shaped, which facilitates the simultaneous driving of multiple positioning blocks to slide out of the positioning groove, release the collar and the rotating shaft from locking along the axis of the rotating shaft, and improve the reliability and convenience of the woodworking hole opener.

[0020] Preferably, the drill bit includes a base and a mounting post. One end of the mounting post is coaxially fixedly connected to one end of the base. One end of the rotating shaft is coaxially connected to a connecting post. The end of the mounting post away from the base is provided with a mounting groove, and the connecting post is threaded into the mounting groove.

[0021] By adopting the above technical solution, the drill bit and the shaft can be detachably connected, which facilitates the replacement and maintenance of the drill bit and the shaft, and improves the applicability and service life of the woodworking hole opener.

[0022] Preferably, it further includes a connecting block, an anti-detachment block, and a second reset component. The end of the rotating shaft near the connecting post is provided with a sliding groove, and the connecting block is slidably embedded in the sliding groove. The sliding direction of the connecting block is parallel to the sliding direction of the positioning block. The end of the mounting post away from the base is provided with an annular groove, which is used for one end of the connecting block to be embedded. An anti-detachment groove is provided on the inner wall of the annular groove. The anti-detachment block is connected to the connecting block and is used to be embedded in the anti-detachment groove. The second reset component is connected between the connecting block and the rotating shaft, and the second reset component makes the anti-detachment block tend to detach from the anti-detachment groove.

[0023] By adopting the above technical solution, the connecting column is threaded into the installation groove, and the anti-detachment block is embedded in the anti-detachment groove. When the shaft or drill bit rotates in the opposite direction, the anti-detachment block abuts against the groove wall, reducing the possibility of the shaft and drill bit separating and improving the safety and reliability of the woodworking hole opener.

[0024] Preferably, the anti-detachment block has a third chamfer at the end away from the connecting block. The third chamfer is located on the side of the anti-detachment block away from the rotating shaft, and the third chamfer is used to abut against the inner wall of the annular groove.

[0025] By adopting the above technical solution, during the process of connecting the threaded column to the installation groove, the third chamfer abuts against the wall of the annular groove, pushing the anti-detachment block and the connecting block to slide, making it easier for the anti-detachment block and the connecting block to be embedded in the annular groove, thus improving the ease of assembly of the woodworking hole opener.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. Slide the collar along the axis of the rotating shaft to the relative position. The positioning component fixes the collar and the rotating shaft to a relative position. The woodworking hole saw works. When the abutting rod abuts the product, it indicates to the operator that the hole depth has reached the specified depth, reducing the possibility of the hole depth being too deep or too shallow, and improving the accuracy of the woodworking hole saw.

[0028] 2. Adjust the relative positions of the extension rod and the abutment rod as needed to meet the requirements of different diameter holes and improve the applicability of the woodworking hole saw;

[0029] 3. The drill bit and spindle are detachably connected, which facilitates the replacement and maintenance of the drill bit and spindle, improving the applicability and service life of the woodworking hole saw. The connecting column is threaded into the mounting groove, and the anti-disengagement block is embedded in the anti-disengagement groove. When the spindle or drill bit rotates in the opposite direction, the anti-disengagement block abuts against the anti-disengagement groove wall, reducing the possibility of the spindle and drill bit separating, and improving the safety and reliability of the woodworking hole saw. Attached Figure Description

[0030] Figure 1 This is a structural diagram of a woodworking hole punch.

[0031] Figure 2 This is a cross-sectional view of a woodworking hole punch.

[0032] Figure 3 yes Figure 2 Enlarged view at point A.

[0033] Figure 4 yes Figure 2 Enlarged view at point B.

[0034] Figure 5 This is a partial sectional view of a woodworking hole punch, mainly showing the abutment rod and extension rod.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Rotating shaft; 11. Scale groove; 12. Guide groove; 13. Positioning groove; 14. Connecting post; 15. Slide groove; 16. Groove;

[0037] 2. Drill bit; 21. Base; 211. Chip removal groove; 22. Mounting post; 221. Mounting groove; 222. Annular groove; 223. Anti-disengagement groove; 23. Cutting blade; 24. Positioning tip; 25. Main cutter body; 251. Inclined surface;

[0038] 3. Limiting mechanism; 31. Collar; 311. Connecting seat; 3111. Indicator arrow; 312. Guide block; 313. Slot; 314. Connecting slot; 315. Communicating slot; 32. Abutting rod; 321. Connecting hole; 322. Limiting slot; 33. Positioning assembly; 331. Positioning block; 3311. Fourth chamfer; 3312. Abutting block; 33121. Second chamfer; 332. First reset component; 34. Extension rod; 341. Limiting block; 3411. Fixing hole; 35. Fixing bolt; 36. Unlocking assembly; 361. Unlocking component; 3611. First chamfer; 362. Push rod; 37. Buffer pad;

[0039] 4. Connecting mechanism; 41. Connecting block; 42. Anti-detachment block; 421. Third chamfer; 43. Second reset component. Detailed Implementation

[0040] The present application will be further described in detail below with reference to the accompanying drawings.

[0041] Reference Figure 1 This application discloses a woodworking hole saw comprising a drill bit 2, which includes a base 21, a cutting blade 23, a positioning tip 24, and a main blade body 25. One end of the positioning tip 24 is coaxially fixedly connected to one end of the base 21. One end of the cutting blade 23 is fixedly connected to the end of the base 21 near the positioning tip 24. Several cutting blades 23 are provided, and the blades are evenly distributed circumferentially around the axis of the base 21. The cutting blade 23 has a triangular cross-section, and the surface of the cutting blade 23 away from the axis of the base 21 is flush with the outer wall of the base 21. The length direction of the main blade body 25 is parallel to the axial direction of the base 21. One end of the main blade body 25 is fixedly connected to the side wall of the positioning tip 24, and the other end is fixedly connected to the surface of the cutting blade 23 near the axis of the base 21. Two main blade bodies 25 are provided, and the two main blade bodies 25 are evenly distributed circumferentially around the axis of the base 21, with their length directions parallel. The main blade 25 has an inclined surface 251 on one side perpendicular to its length. The inclined surface 251 is inclined from one end near the base 21 to the other side wall near the main blade 25. The base 21 has chip removal grooves 211 on its outer wall. The chip removal grooves 211 are located on the side of the main blade 25 near the inclined surface 251. The number of chip removal grooves 211 is the same as the number of main blades 25 and they correspond one-to-one. The side wall of the chip removal groove 211 near the main blade 25 is flush with the inclined surface 251. The two sides of the chip removal groove 211 along the width direction of the main blade 25 are parallel.

[0042] Reference Figure 1 and Figure 2 A woodworking hole saw also includes a rotating shaft 1, and a drill bit 2 includes a mounting post 22. One end of the mounting post 22 is coaxially fixedly connected to the end of the base 21 away from the positioning tip 24, and the end of the mounting post 22 away from the base 21 is coaxially provided with a mounting groove 221. One end of the rotating shaft 1 is coaxially fixedly connected to a connecting post 14, and the end of the connecting post 14 away from the rotating shaft 1 is threaded into the mounting groove 221.

[0043] A woodworking hole saw also includes a limiting mechanism 3, which includes a collar 31. The collar 31 is coaxially and slidably connected to the outer periphery of a rotating shaft 1. The outer periphery of the rotating shaft 1 is provided with guide grooves 12, and there are two guide grooves 12, which are symmetrically distributed along a line perpendicular to the axis of the rotating shaft 1. Guide blocks 312 are fixedly connected to the inner wall of the collar 31. The number of guide blocks 312 is the same as the number of guide grooves 12 and they correspond one-to-one. The guide blocks 312 are slidably embedded in the guide grooves 12, and the sliding direction of the guide blocks 312 is parallel to the sliding direction of the collar 31. The sidewall of the guide block 312 is in contact with the groove wall of the guide groove 12.

[0044] Reference Figure 2 and Figure 3 The guide block 312 has a groove 313 at one end near the bottom of the guide groove 12. The limiting mechanism 3 also includes a positioning component 33, which includes a positioning block 331 and a first reset member 332. The number of positioning blocks 331 and the number of first reset members 332 are the same as the number of grooves 313 and correspond one-to-one. The positioning block 331 is slidably embedded in the groove 313, and the sliding direction of the positioning block 331 is perpendicular to the sliding direction of the collar 31. The sidewall of the positioning block 331 is in contact with the groove wall of the groove 313. The bottom of the guide groove 12 has a plurality of positioning grooves 13 for the positioning block 331 to be embedded in. The plurality of positioning grooves 13 are spaced apart along the sliding direction of the collar 31. In this embodiment, there are thirty-one positioning grooves 13, which are evenly distributed along the sliding direction of the collar 31. The outer periphery of the positioning block 331 away from the bottom of the groove 313 has a fourth chamfer 3311, which is used to abut against the groove wall of the positioning groove 13. The first reset member 332 is connected between the positioning block 331 and the collar 31. The first reset member 332 causes the end of the positioning block 331 away from the groove 313 to tend to extend out of the groove 313. In this embodiment, the first reset member 332 is a spring. One end of the first reset member 332 is connected to the bottom of the groove 313, and the other end of the first reset member 332 is connected to the end of the positioning block 331 near the bottom of the groove 313.

[0045] The limiting mechanism 3 also includes an unlocking component 36, which includes an unlocking element 361 and a push rod 362. A connecting groove 314 is provided on the side wall of the recess 313 away from the base 21, and the connecting groove 314 communicates with the recess 313. The connecting groove 314 is annular, and its axis coincides with the axis of the collar 31. The unlocking element 361 is slidably embedded in the connecting groove 314, and the sliding direction of the unlocking element 361 is parallel to the axis of the collar 31. The unlocking element 361 is annular, and its sidewall is in contact with the wall of the connecting groove 314. The unlocking component 361 has a first chamfer 3611 at the end near the groove 313. The first chamfer 3611 is located on the side of the unlocking component 361 away from the bottom of the guide groove 12. The positioning block 331 has an abutment block 3312 fixedly connected to the side near the connecting groove 314. The abutment block 3312 has a second chamfer 33121 at the end away from the positioning block 331. The second chamfer 33121 is located on the side of the abutment block 3312 away from the bottom of the guide groove 12 and is used to abut against the first chamfer 3611. The collar 31 has a connecting seat 311 fixedly connected to the side away from the base 21. The number of connecting seats 311 is the same as the number of guide blocks 312 and they correspond one-to-one. The connecting seat 311 has a communicating groove 315 at the end away from the collar 31, and the communicating groove 315 communicates with the connecting groove 314. The number of push rods 362 is the same as the number of connecting slots 315 and they correspond one-to-one. One end of the push rod 362 is fixedly connected to the end of the unlocking member 361 away from the slot 313, and the other end of the push rod 362 passes through the connecting slot 315 and extends out of the connecting seat 311.

[0046] Reference Figure 3 The outer circumference of the rotating shaft 1 is provided with a scale groove 11, and one guide groove 12 corresponds to two scale grooves 11. Two fixing grooves are symmetrically distributed on both sides of the guide groove 12 along the circumference of the rotating shaft 1. The connecting seat 311 is provided with an indicator arrow 3111 on the side away from the rotating shaft 1. The indicator arrow 3111 is used to align with the scale groove 11.

[0047] Reference Figure 2 and Figure 4A woodworking hole saw also includes a connecting mechanism 4, which includes a connecting block 41, an anti-detachment block 42, and a second reset member 43. A sliding groove 15 is provided at one end of the rotating shaft 1 near the connecting post 14. The sliding groove 15 communicates with the positioning groove 13. The number of sliding grooves 15, connecting blocks 41, and anti-detachment blocks 42 is the same as the number of guide grooves 12 and corresponds one-to-one. The connecting block 41 is slidably embedded in the sliding groove 15, and the sliding direction of the connecting block 41 is parallel to the sliding direction of the positioning block 331. The end of the connecting block 41 away from the bottom of the sliding groove 15 extends out of the sliding groove 15. One end of the anti-detachment block 42 is fixedly connected to the end of the connecting block 41 away from the bottom of the sliding groove 15, and the anti-detachment block 42 is located on the side of the connecting block 41 away from the positioning groove 13. An annular groove 222 is provided at the end of the mounting post 22 away from the base 21. The annular groove 222 surrounds the mounting groove 221 and is used for the connecting block 41 and the anti-detachment block 42 to be embedded. The anti-detachment block 42 has a third chamfer 421 at the end away from the connecting block 41. The third chamfer 421 is located on the side of the anti-detachment block 42 away from the bottom of the annular groove 222 and is used to abut against the inner wall of the annular groove 222. An anti-detachment groove 223 is provided on the inner wall of the annular groove 222 for the anti-detachment block 42 to be embedded. The second reset member 43 is connected between the anti-detachment block 42 and the rotating shaft 1. The second reset member 43 makes the anti-detachment block 42 tend to detach from the anti-detachment groove 223. In this embodiment, the second reset member 43 is a spring. Five grooves 16 are provided on the side wall of the annular groove 222 away from the positioning groove 13. The five grooves 16 are evenly distributed along the axis of the rotating shaft 1. The number of second reset members 43 is the same as the number of grooves 16 and they correspond one-to-one. One end of the second reset member 43 is connected to the bottom of the groove 16, and the other end of the second reset member 43 is connected to the surface of the connecting block 41 away from the positioning groove 13.

[0048] Reference Figure 2 and Figure 5The limiting mechanism 3 also includes an abutment rod 32, an extension rod 34, a fixing bolt 35, and a buffer pad 37. One end of the abutment rod 32 is fixedly connected to the outer wall of the collar 31. The length direction of the abutment rod 32 is perpendicular to the sliding direction of the positioning block 331. The abutment rod 32 is located between two connecting seats 311. The extension rod 34 is slidably connected to the side of the abutment rod 32 near the base 21. The sliding direction of the extension rod 34 is parallel to the length direction of the abutment rod 32. A limiting groove 322 is provided on the side of the abutment rod 32 near the extension rod 34. A limiting block 341 is fixedly connected to the surface of the extension rod 34 away from the base 21. The limiting block 341 is slidably embedded in the limiting groove 322. The sliding direction of the limiting block 341 is parallel to the sliding direction of the extension rod 34. In this embodiment, the limiting block 341 is a dovetail block. The buffer pad 37 is fixedly connected to the side of the extension rod 34 away from the abutment rod 32. The limiting block 341 has a fixing hole 3411 at one end near the bottom of the limiting groove 322. The bottom of the limiting groove 322 has several connecting holes 321, the axis of which is perpendicular to the axis of the rotating shaft 1. The connecting holes 321 are spaced apart along the length of the abutment rod 32. The fixing bolt 35 passes through the connecting holes 321 and is threaded into the fixing hole 3411. In this embodiment, there are two connecting holes 321, which are symmetrically distributed along the length of the abutment rod 32.

[0049] The implementation principle of a woodworking hole punch in this application embodiment is as follows: A drill bit 2 of the required diameter is connected to a rotating shaft 1 as needed. A connecting post 14 is threaded into the mounting hole. The third chamfer 421 abuts against the wall of the annular groove 222, pushing the anti-detachment block 42 to slide, causing the connecting block 41 to slide, and pushing the positioning block 331 to slide against the elastic force of the first reset member 332. The anti-detachment block 42 and the connecting hole 321 are embedded in the annular groove 222. When the anti-detachment block 42 and the anti-detachment groove 223 are aligned, the first reset member 332 drives the positioning block 331 to slide, pushing the connecting hole 321 to slide against the second reset member 43, causing the anti-detachment block 42 to embed in the anti-detachment groove 223, thus achieving relative fixation of the rotating shaft 1 and the drill bit 2 along the axial direction of the rotating shaft 1.

[0050] In use, pressing the push rod 362 causes the unlocking piece 361 to slide, the first chamfer 3611 abuts against the second chamfer 33121, pushing the positioning block 331 to overcome the elastic force of the first reset piece 332 and disengage from the positioning groove 13. Sliding the collar 31 aligns the indicator arrow 3111 with the corresponding scale groove 11. Releasing the push rod 362 causes the first reset piece 332 to drive the positioning block 331 to slide, and the fourth chamfer 3311 abuts against the groove wall of the positioning groove 13, causing the positioning block 331 to embed into the positioning groove 13, thus achieving relative fixation of the collar 31 and the rotating shaft 1 along the axis of the rotating shaft 1. Sliding the extension rod 34 causes the fixing hole 3411 to correspond to the corresponding connecting hole 321. The fixing bolt 35 passes through the connecting hole 321 and is threadedly connected to the fixing hole 3411, achieving relative fixation of the extension rod 34 and the abutment rod 32.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A woodworking hole saw, characterized in that: It includes a rotating shaft (1), a drill bit (2), and a limiting mechanism (3); one end of the rotating shaft (1) is coaxially connected to one end of the drill bit (2); the limiting mechanism (3) includes a collar (31), an abutment rod (32), and a positioning component (33); the collar (31) is coaxially slidably connected to the outer periphery of the rotating shaft (1); one end of the abutment rod (32) is connected to the outer wall of the collar (31); the positioning component (33) is connected between the collar (31) and the rotating shaft (1) to achieve relative fixation of the collar (31) and the rotating shaft (1) along the axial direction of the rotating shaft (1).

2. The woodworking hole saw according to claim 1, characterized in that: The limiting mechanism (3) further includes an extension rod (34) and a fixing bolt (35); the extension rod (34) is slidably connected to the abutment rod (32); the sliding direction of the extension rod (34) is parallel to the length direction of the abutment rod (32); the abutment rod (32) is provided with a plurality of connecting holes (321); the plurality of connecting holes (321) are spaced apart along the sliding direction of the extension rod (34); the fixing bolt (35) passes through the connecting hole (321) and is threadedly connected to the extension rod (34).

3. The woodworking hole saw according to claim 1, characterized in that: The collar (31) is connected to a connecting seat (311) on the side away from the drill bit (2); an indicator arrow (3111) is provided on the side wall of the connecting seat (311); a scale groove (11) is provided on the outer circumference of the rotating shaft (1); the indicator arrow (3111) is used to align with the scale groove (11).

4. The woodworking hole saw according to claim 3, characterized in that: The inner side of the collar (31) is connected to a guide block (312); the outer circumference of the rotating shaft (1) is provided with a guide groove (12); the guide block (312) is slidably embedded in the guide groove (12); the side wall of the guide block (312) is in contact with the groove wall of the guide groove (12).

5. The woodworking hole saw according to claim 4, characterized in that: The positioning component (33) includes a positioning block (331) and a first reset member (332); the positioning block (331) is slidably connected to the collar (31); the sliding direction of the positioning block (331) is perpendicular to the sliding direction of the collar (31); the bottom of the guide groove (12) is provided with a plurality of positioning grooves (13); the positioning grooves (13) are used for the positioning block (331) to be embedded; the plurality of positioning grooves (13) are distributed at intervals along the sliding direction of the collar (31); the first reset member (332) is connected between the positioning block (331) and the collar (31); the first reset member (332) makes the positioning block (331) tend to be embedded in the positioning groove (13).

6. The woodworking hole saw according to claim 5, characterized in that: The limiting mechanism (3) further includes an unlocking component (361); the unlocking component (361) is slidably connected to the collar (31); the sliding direction of the unlocking component (361) is parallel to the sliding direction of the collar (31); the unlocking component (361) has a first chamfer (3611) at one end near the positioning block (331); the first chamfer (3611) is located on the side of the unlocking component (361) away from the rotating shaft (1); the first chamfer (3611) is used to abut against the positioning block (331).

7. The woodworking hole saw according to claim 6, characterized in that: The positioning blocks (331) are provided in a plurality of them; the plurality of positioning blocks (331) are distributed circumferentially around the axis of the collar (31); the number of the first reset members (332) is the same as the number of positioning blocks (331) and corresponds one to one; the unlocking member (361) is in the shape of a ring.

8. The woodworking hole saw according to claim 5, characterized in that: The drill bit (2) includes a base (21) and a mounting post (22); one end of the mounting post (22) is coaxially fixedly connected to one end of the base (21); one end of the rotating shaft (1) is coaxially connected to a connecting post (14); the end of the mounting post (22) away from the base (21) is provided with a mounting groove (221); the connecting post (14) is threaded into the mounting groove (221).

9. The woodworking hole saw according to claim 8, characterized in that: It also includes a connecting block (41), an anti-detachment block (42), and a second reset member (43); the end of the rotating shaft (1) near the connecting post (14) is provided with a sliding groove (15); the connecting block (41) is slidably embedded in the sliding groove (15); the sliding direction of the connecting block (41) is parallel to the sliding direction of the positioning block (331); the end of the mounting post (22) away from the base (21) is provided with an annular groove (222); the annular groove (222) is used for one end of the connecting block (41) to be embedded; an anti-detachment groove (223) is provided on the inner wall of the annular groove (222); the anti-detachment block (42) is connected to the connecting block (41); the anti-detachment block (42) is used to be embedded in the anti-detachment groove (223); the second reset member (43) is connected between the connecting block (41) and the rotating shaft (1); the second reset member (43) makes the anti-detachment block (42) tend to detach from the anti-detachment groove (223).

10. The woodworking hole saw according to claim 9, characterized in that: The anti-detachment block (42) has a third chamfer (421) at one end away from the connecting block (41); the third chamfer (421) is located on the side of the anti-detachment block (42) away from the rotating shaft (1); the third chamfer (421) is used to abut against the inner wall of the annular groove (222).

Images