Adjustable wood drill

Abstract

The utility model provides an adjustable wood drill, and belongs to the technical field of wood tools. The adjusting groove with the two ends penetrating through the side wall of the drill bit is formed in the side wall of one end of the drill bit in the tangential direction, meanwhile, the blade with the cutting edge is installed in the adjusting groove, the pressing piece is arranged at the other end of the drill bit, and the blade in the adjusting groove is pressed or loosened through the pressing piece. The end of the blade can extend out of the side wall of the drill bit from the inside of the adjusting groove, the extending length of the end of the blade can be adjusted, the length of the cutting edge can be adjusted through the extending length of the end of the blade, and therefore the drilling machining requirements of holes of different sizes are met, the problem that a wood drill needs to be frequently replaced when holes of different hole diameters are drilled is solved, and machining efficiency is improved. And the labor burden of operators is relieved, use is more convenient, meanwhile, the blade can be directly replaced under the condition that the cutting edge is damaged, and the problem that the use cost is high due to overall scrapping is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of woodworking tools, in particular to an adjustable woodworking drill. Background Art

[0002] As a commonly used structure in the process of wood product processing, woodworking drills are usually used to drill holes in wooden parts to achieve the embedding and insertion of other components, providing convenience for the processing of wood products.

[0003] At present, the woodworking drills available on the market include round drills and flat drills. The round drill, such as the woodworking drill disclosed in patent CN1654176A, has a front spiral and a center cone formed at the front center of the drill body, and three spiral leads are formed on the drill body. The front ends of the three spiral leads are respectively formed with front edges from the periphery to the center, and the outer periphery of the front ends of the three spiral leads is formed with a scoring edge protruding forward than the front edge, which is used to drill round holes in wooden boards and columns. A flat woodworking flat drill disclosed in patent CN108481482A has a cutting head including three cutting edges equidistantly distributed radially with the drill handle axis as the center. At the same time, a self-tapping thread groove is provided on the side surface of the upper end of each cutting edge, and an arc groove is provided on the side surface of each cutting edge at the lower end of the self-tapping thread groove, and the arc groove includes a transverse arc groove and a drill tip arc groove arranged in sequence from the inside to the outside. In addition, it is also proposed that the existing woodworking drill can also be a double-edged structure, and a woodworking drill with a suitable cutting edge can be selected according to different usage scenarios. Although the above-mentioned woodworking drills can meet general drilling needs, the drill bit size of the above-mentioned woodworking drills is fixed, and in actual processing, usually a product needs to be processed with multiple holes of different sizes, resulting in the need to frequently replace woodworking drills of different sizes, which not only affects the processing efficiency, but also causes unnecessary labor burden to the operator and affects the user experience. In addition, if part of the cutting edge is damaged, the entire woodworking drill will be scrapped, making its use cost also high. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention aims to provide an adjustable woodworking drill, in which an adjustment slot is opened on the drill bit, a slidable blade is installed in the adjustment slot, and cutting edges of different widths are formed by the distance that the end of the blade extends out of the side of the drill bit, thereby meeting the drilling processing requirements of holes of different sizes, avoiding the problem of frequent replacement of woodworking drills, improving processing efficiency, and reducing labor burden. In addition, the blade can be directly replaced when the cutting edge is damaged, thereby avoiding the overall scrapping of the woodworking drill and reducing the cost of use.

[0005] The specific technical solutions are as follows:

[0006] An adjustable woodworking drill has the following characteristics, including: a drill bit, a blade, a clamping piece, a rod and a handle. An adjustment groove penetrating both sides is opened on the side wall of one end of the drill bit along its tangent direction. A blade is arranged in the adjustment groove, and the end of the blade extends out of the adjustment groove. At the same time, the clamping piece is arranged on the other end of the drill bit and clamps the blade, and the other end of the drill bit is connected to the rod. At the same time, a handle is arranged at the other end of the rod, and the cross-section of the handle is arranged in a regular polygon. The drill bit, the rod and the handle together constitute the drill body and are an integrated structure.

[0007] In the above-mentioned adjustable woodworking drill, a drill tip is also arranged on the end surface of one end of the drill bit provided with the adjusting groove and along the axial extension line thereof.

[0008] In the above-mentioned adjustable woodworking drill, the drill tip is a threaded drill tip, and a cutting groove is provided on the outer wall of the drill tip along its axial direction.

[0009] In the above-mentioned adjustable woodworking drill, one end of the drill bit provided with the adjustment groove is provided with a guide groove extending in an arc shape along its axial direction, one end of the guide groove extends to the tail of the drill tip, and the other end extends into the adjustment groove.

[0010] The above-mentioned adjustable woodworking drill, wherein the adjustment groove includes a positioning groove, an avoidance groove and a cutting groove, the positioning groove is opened on the side of the drill bit along the tangent of the drill bit and both ends pass through the side wall of the drill bit, an avoidance groove connected to the positioning groove is opened at one end of the drill bit away from the rod part and located at the notch of the positioning groove, both ends of the avoidance groove also pass through the side wall of the drill bit, the side of the avoidance groove away from the connected positioning groove is connected to the guide groove, and the groove depth of the avoidance groove is less than the groove depth of the positioning groove and a limiting step is formed between the two, a cutting groove is opened on the groove side wall at one end of the drill bit close to the rod part and located at the groove bottom of the positioning groove, both ends of the cutting groove pass through the side wall of the drill bit, the part of the drill bit close to the rod part and located at the notch of the positioning groove is separated by the cutting groove to become a clamping part, and the limiting step and the clamping part press the two sides of the blade respectively.

[0011] The above-mentioned adjustable woodworking drill, wherein a locking hole is provided on the clamping part, and a connecting hole is provided at the bottom of the groove. At the same time, the locking hole passes through the groove, and the locking hole and the connecting hole are coaxially arranged. The locking piece is a locking screw, which passes through the locking hole and is threadedly connected to the connecting hole.

[0012] The above-mentioned adjustable woodworking drill, wherein the groove side wall of the positioning groove constituting the limiting step is arranged inclined to form a first clamping surface, and at the same time, the end surface of the clamping part close to one end of the positioning groove is also arranged inclined to form a second clamping surface, and the inclination directions of the first clamping surface and the second clamping surface are opposite, and at the same time, the first clamping surface and the second clamping surface form a shrinkage structure with the notch of the positioning groove.

[0013] The above-mentioned adjustable woodworking drill, wherein the blade is a strip structure and has a quadrilateral cross-section, a long edge of the blade is a cutting edge, and the two surfaces constituting the cutting edge are respectively a front angle surface and a rear angle surface, an edge on the blade diagonally opposite to the cutting edge is a pressure edge, and the two surfaces constituting the pressure edge are respectively a bottom surface and a first mating surface, and the front angle surface is connected to the first mating surface, and the rear angle surface is connected to the bottom surface, and at the same time, an inwardly concave groove is provided on the rear angle surface along its length direction, and the groove wall of the groove constitutes the second mating surface, and when the blade is installed in the adjustment groove, the cutting edge extends into the avoidance groove, and the limiting step is inserted into the groove, and at the same time, the first pressing surface is in contact with the second mating surface, and the second pressing surface is in contact with the first mating surface.

[0014] In the above-mentioned adjustable woodworking drill, the front angle surface is an inclined surface, and the inclination angle range of the front angle surface is 0-90°, and the rear angle surface is an arc surface or an inclined surface.

[0015] In the above-mentioned adjustable woodworking drill, scales are arranged on the front angle surface of the blade and along the length direction of the blade.

[0016] In the above-mentioned adjustable woodworking drill, an arc-shaped chip removal groove is provided on the front angle surface of the blade, and one side of the arc-shaped chip removal groove extends to the cutting edge.

[0017] In the above-mentioned adjustable woodworking drill, a heat dissipation hole is provided on the blade along the length direction thereof.

[0018] The positive effects of the above technical solution are:

[0019] The above-mentioned adjustable woodworking drill is provided with an adjustment groove on the side wall of one end of the drill bit along its tangent direction, and both ends of the adjustment groove penetrate the side wall of the drill bit. At the same time, a blade with a cutting edge is installed in the adjustment groove, so that the end of the blade can extend from the adjustment groove to the outside of the side wall of the drill bit. In addition, a clamping piece is also provided on the drill bit, and the blade is clamped or loosened by the clamping piece, thereby realizing temporary fixation and loosening of the blade in the adjustment groove, thereby facilitating the movement and adjustment of the blade in the adjustment groove. During adjustment, the distance that the end of the blade protrudes from the side of the drill bit changes, so that the length of the cutting edge protruding from the blade changes, thereby meeting the drilling processing requirements of holes of different sizes. There is no need to frequently replace the woodworking drill, the processing efficiency is higher, and the labor burden is lighter. At the same time, the blade can be directly replaced when the cutting edge is damaged, thereby avoiding the overall scrapping of the woodworking drill and lowering the use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of an embodiment of an adjustable woodworking drill of the utility model;

[0021] Figure 2 A structural diagram showing a drill body with a drill tip in one preferred embodiment of the utility model from one perspective;

[0022] Figure 3 A cross-sectional view of a drill body with a drill tip in another preferred embodiment of the utility model;

[0023] Figure 4 A structural diagram of a blade from one perspective of a preferred embodiment of the utility model;

[0024] Figure 5 A cross-sectional view of a blade of a preferred embodiment of the utility model;

[0025] Figure 6 This is a cross-sectional view of another blade according to a preferred embodiment of the utility model.

[0026] In the accompanying drawings: 1. drill bit; 11. adjustment groove; 12. guide groove; 111. positioning groove; 112. avoidance groove; 113. cutting groove; 114. limiting step; 115. clamping part; 1111. first clamping surface; 1131. connecting hole; 1151. locking hole; 1152. second clamping surface; 2. blade; 21. cutting edge; 22. front angle surface; 23. rear angle surface; 24. pressing edge; 25. bottom surface; 26. first matching surface; 27. slot; 28. second matching surface; 29. ​​heat dissipation hole; 221. scale; 222. chip removal groove; 3. clamping piece; 4. rod; 5. handle; 6. drill tip; 61. cutting groove. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 6 The technical solution provided by the utility model is described in detail, but the following content is not intended to limit the utility model.

[0028] Figure 1 FIG. 1 is a structural diagram of an embodiment of an adjustable woodworking drill according to the present utility model. Figure 1 As shown, the adjustable woodworking drill provided in this embodiment includes: a drill bit 1, a blade 2, a clamping member 3, a rod 4 and a handle 5.

[0029] Figure 2 A structural diagram showing a drill body with a drill tip in one preferred embodiment of the utility model from one perspective; Figure 3 This is a cross-sectional view of a drill body with a drill tip from another perspective of a preferred embodiment of the utility model. Figure 1 , Figure 2 as well as Figure 3As shown, an adjustment groove 11 penetrating both sides is provided on the side wall of one end of the drill bit 1 along its tangent direction, that is, a transverse adjustment groove 11 is provided at one end of the drill bit 1, and both sides of the transverse adjustment groove 11 penetrate the side wall of the drill bit 1. At the same time, the blade 2 is installed in the adjustment groove 11, and the end of the blade 2 extends out of the adjustment groove 11. Preferably, one end of the blade 2 extends from one side of the adjustment groove 11, so that the blade 2 can extend laterally of the drill bit 1, expanding the lateral size of the drill bit 1. When drilling, the wood can be cut by the extended part of the blade 2, thereby achieving the drilling requirement. At the same time, a pressing member 3 is arranged on the other end of the drill bit 1. At this time, the blade 2 installed in the adjustment groove 11 is pressed by the pressing member 3. That is, when the blade 2 is installed or needs to be adjusted, the pressing member 3 can be loosened to facilitate the installation or movement of the blade 2 in the adjustment groove 11, so as to adjust the length of the blade 2 end extending outside the drill bit 1, thereby adjusting the length of the cutting edge 21 of the blade 2, so as to adapt to the drilling processing of holes with different apertures, thereby avoiding the problem of frequently changing the woodworking drill to process different holes, improving the processing efficiency, and reducing the labor burden of the operator. In addition, since the blade 2 can move in the adjustment groove 11, it is convenient to disassemble the blade 2, so that the blade 2 can be directly replaced when the cutting edge 21 is damaged, avoiding the overall scrapping of the woodworking drill and reducing the use cost. In addition, the other end of the drill bit 1 is connected to the rod 4, and at the same time, the other end of the rod 4 is provided with a handle 5. At this time, the drill bit 1, the rod 4 and the handle 5 together constitute the drill body, that is, the blade 2 is installed on the drill body, and at the same time, the drill body is set as an integrated structure to improve the structural strength. In addition, the cross-sectional shape of the handle 5 is arranged in a regular polygon. Preferably, the cross-sectional shape of the handle 5 is a regular hexagon, which can meet the assembly requirements of the sleeve of the existing drilling tool and has better adaptability. It also prevents slipping during use and improves installation stability.

[0030] Specifically, a drill tip 6 is also provided on the end surface of the drill bit 1 at one end where the adjustment groove 11 is provided. At this time, the drill tip 6 is arranged along the axial extension line of the drill bit 1, and the drill clamp facilitates the drill bit 1 to quickly locate and drill holes, thereby improving the use efficiency and ensuring the processing accuracy. It is worth noting that the drill tip 6 and the drill body are an integrated structure, which also improves the structural strength and facilitates manufacturing and molding.

[0031] More specifically, the drill tip 6 is a threaded drill tip 6, which increases the pulling force of the drill tip 6 during drilling, making the feed speed of the woodworking drill faster, increasing the cutting speed and depth, making the drilling efficiency higher and more labor-saving. In addition, a cutting groove 61 is provided on the outer wall of the drill tip 6 along its axial direction, and the cutting groove 61 cuts off the thread, so that part of the thread teeth on the threaded drill tip 6 are broken thread teeth, which appropriately reduces the pulling force of the threaded drill tip 6, thereby facilitating the operator to achieve adjustable feed and improving the finish of the drilled surface.

[0032] More specifically, a guide groove 12 extending in an arc shape along its axial direction is also provided at one end of the drill bit 1 provided with the adjustment groove 11, that is, an arc-shaped guide groove 12 extending in a manner similar to a notch is provided on the side wall of the drill bit 1 and at one end of the drill bit 1 provided with the drill tip 6. At this time, one end of the guide groove 12 is extended to the tail of the drill tip 6, and the other end of the guide groove 12 is extended into the adjustment groove 11, so that the drill bit 1 can form a transition cutting edge 21 through the notch at one end extending from the guide groove 12 to the tail of the drill tip 6, which facilitates the drill bit 1 to feed on the wood in the first place. At the same time, chip removal is achieved through the guide groove 12, which provides conditions for the cutting edge 21 of the blade 2 in the subsequent adjustment groove 11 to contact the wood.

[0033] More specifically, the adjustment groove 11 on the drill bit 1 for installing the blade 2 includes a positioning groove 111, an avoidance groove 112 and a cutting groove 113. At this time, the positioning groove 111 is opened on the side of the drill bit 1 along the tangent of the drill bit 1, and both ends of the positioning groove 111 penetrate the side wall of the drill bit 1, providing conditions for the subsequent end of the blade 2 to extend out, and also providing conditions for the subsequent fixing of the blade 2 through the positioning groove 111. In addition, an avoidance groove 112 connected to the positioning groove 111 is further opened on the end of the drill bit 1 away from the rod portion 4 and located at the notch of the positioning groove 111. Similarly, both ends of the avoidance groove 112 also penetrate the side wall of the drill bit 1, also providing conditions for the subsequent end of the blade 2 to extend out, and also providing installation space for the cutting edge 21 of the blade 2. Furthermore, the side of the avoidance groove 112 that is away from the connected positioning groove 111 is connected to the guide groove 12, so that the cutting operation at the guide groove 12 can be directly performed by the cutting edge 21 in the avoidance groove 112, thereby ensuring the continuity of the drilling process. In addition, the groove depth of the avoidance groove 112 is set to be smaller than the groove depth of the positioning groove 111, so that a limiting step 114 can be formed between the avoidance groove 112 and the positioning groove 111, providing conditions for subsequently pressing one side of the installed blade 2 by the limiting step 114. In addition, a groove 113 is opened on the side wall of the groove at the bottom of the positioning groove 111 at one end of the drill bit 1 close to the rod portion 4, and the groove 113 extends along the length direction of the drill bit 1. At the same time, the two ends of the groove 113 pass through the side wall of the drill bit 1, so that the groove 113 divides the drill bit 1 at its location into two parts, that is, the part of the drill bit 1 close to the rod portion 4 and located at the notch of the positioning groove 111 is separated by the groove 113 to become a clamping part 115, and the clamping part 115 can be adjusted by compressing the groove width of the groove 113, that is, limiting steps 114 and clamping parts 115 are respectively formed on both sides of the positioning groove 111, so that when the blade 2 is subsequently installed, the limiting steps 114 and the clamping parts 115 can respectively press the two sides of the blade 2 to achieve stable installation of the blade 2.

[0034] More specifically, a locking hole 1151 is provided on the pressing part 115, and a connecting hole 1131 is provided at the bottom of the slot 113. In addition, the locking hole 1151 penetrates the pressing part 115, so that one end of the locking hole 1151 is connected to the slot 113. In addition, the locking hole 1151 and the connecting hole 1131 are coaxially arranged so that the locking hole 1151 and the connecting hole 1131 can be directly opposite, and the locking member is a locking screw. During installation, the locking screw as the locking member is passed through the locking hole 1151 and then threadedly connected to the connecting hole 1131, that is, by twisting the locking screw, the pressing part 115 is tightened or loosened, so that the slot width of the slot 113 changes, so that the pressing part 115 can tighten or loosen the blade 2, which facilitates the adjustment of the blade 2.

[0035] More specifically, the groove side walls of the positioning groove 111 that constitute the limiting step 114 are arranged in an inclined manner, and the inclined groove side walls form a first clamping surface 1111. At the same time, the end surface of the clamping portion 115 close to one end of the positioning groove 111 is arranged in an inclined manner, and the inclined end surface forms a second clamping surface 1152. That is, the blade 2 can be pressed by the first clamping surface 1111 and the second clamping surface 1152 subsequently to achieve stable installation of the blade 2. In addition, the first pressing surface 1111 and the second pressing surface 1152 are set to have opposite inclination directions, and the first pressing surface 1111 and the second pressing surface 1152 form a shrinkage structure for the notch of the positioning groove 111, so that when the pressing part 115 is subsequently pressed by the pressing member 3, the notch of the positioning groove 111 can be further contracted, so that the first pressing surface 1111 and the second pressing surface 1152 can further press the blade 2 to meet the use requirements of stable installation of the blade 2, and when the pressing member 3 is released, the pressing part 115 automatically resets, so that the notch of the positioning groove 111 can be released and expanded, which facilitates the adjustment and disassembly of the blade 2 and meets the use requirements.

[0036] Figure 4 A structural diagram of a blade from one perspective of a preferred embodiment of the utility model; Figure 5 FIG. 2 is a cross-sectional view of a blade of a preferred embodiment of the utility model. Figure 1 , Figure 4 as well as Figure 5As shown, the blade 2 is a strip-shaped structure, which meets the use requirements that the end of the subsequent blade 2 needs to extend out. In addition, the cross-section of the blade 2 is a quadrilateral and a structure that is approximately rhombus-shaped, so that the blade 2 has at least one relatively protruding long edge. At this time, the relatively protruding long edge on the blade 2 is a cutting edge 21, which facilitates the cutting process of wood. In addition, the two faces constituting the cutting edge 21 on the blade 2 are respectively a front angle face 22 and a rear angle face 23. The front angle face 22 is the face where the blade 2 contacts the wood and feeds, and the rear angle face 23 is a cutting guide face to avoid hindering the cutting movement of the blade 2. In addition, a long edge on the blade 2 that is diagonal to the cutting edge 21 is set as a pressure edge 24. At this time, the two faces constituting the pressure edge 24 on the blade 2 are respectively set as a bottom surface 25 and a first mating surface 26. Overall, the front angle face 22 of the blade 2 is connected to the first mating surface 26, and the rear angle face 23 is connected to the bottom surface 25, thereby forming a structure with a cross-section that is approximately rhombus-shaped. At the same time, an inwardly concave slot 27 is provided on the rear angle surface 23 of the blade 2 and along its length direction. Preferably, the cross-sectional shape of the slot 27 is consistent with the cross-sectional shape of one side of the limiting step 114, and the slot wall of the slot 27 is set to form a second mating surface 28, so that when the blade 2 is subsequently installed in the adjustment slot 11, the cutting edge 21 of the blade 2 can be extended into the avoidance slot 112. At the same time, the limiting step 114 is inserted into the slot 27, and the first pressing surface 1111 at the limiting step 114 is fitted with the second mating surface 28 of the blade 2 and the second pressing surface 1152 of the pressing portion 115 is fitted with the first mating surface 26 of the blade 2 to limit the blade 2, and the pressing portion 115 is pressed by the pressing piece 3 so that the second pressing surface 1152 can obliquely squeeze the first mating surface 26, thereby stably limiting the blade 2 in the adjustment slot 11, thereby achieving stable installation of the blade 2.

[0037] More specifically, the front angle surface 22 of the blade 2 is an inclined surface, and the inclination angle of the front angle surface 22 ranges from 0 to 90 degrees. Preferably, the inclination angle of the front foot surface is 7 degrees, which can prevent the problem of the blade 2 being too thin and affecting its structural strength, prevent the problem of the blade 2 being easy to break, and also make the cutting edge 21 have the best feed angle, which is convenient for cutting. In addition, the rear angle surface 23 of the blade 2 is an arc surface or an inclined surface, that is, the rear angle surface 23 of the blade 2 is an arc or an inclined straight line transition, which better highlights the cutting edge 21, and also facilitates the feed of the cutting edge 21, and the structural design is more reasonable.

[0038] More specifically, a scale 221 is provided on the front angle surface 22 of the blade 2 and along the length direction of the blade 2, and a reference line can also be provided on the clamping portion 115, so that when the position of the blade 2 in the adjustment groove 11 is subsequently adjusted, the extended length of the blade 2 can be quickly obtained by aligning the scale 221 with the side of the drill bit 1 or the reference line on the clamping portion 115, which facilitates the adjustment of the blade 2 and also ensures the accuracy of the drilling process.

[0039] Figure 6 FIG. 2 is a cross-sectional view of another blade of a preferred embodiment of the utility model. Figure 1 , Figure 4 as well as Figure 6 As shown, the present embodiment also provides an improved blade 2, i.e., an arc-shaped chip groove 222 is provided on the front angle surface 22 of the blade 2, and the chip groove 222 covers the length direction of the blade 2. At this time, one side of the arc-shaped chip groove 222 is extended to the cutting edge 21, so that the wood chips generated during the drilling process can be quickly guided out of the hole along the arc-shaped surface of the chip groove 222, thereby realizing rapid chip removal, avoiding the problem of untimely discharge of wood chips and hindering the feed of the woodworking drill, and achieving better use effect.

[0040] In addition, a heat dissipation hole 29 is provided on the blade 2 along its length direction, and both ends of the heat dissipation hole 29 pass through both ends of the blade 2, so that a large amount of heat generated by the blade 2 during the cutting process can be quickly dissipated through air convection of the heat dissipation hole 29, thereby reducing the processing temperature of the blade 2 and extending the service life of the blade 2.

[0041] The adjustable woodworking drill provided in this embodiment includes a drill bit 1, a blade 2, a clamping member 3, a rod 4 and a handle 5; the drill bit 1, the rod 4 and the handle 5 are formed into an integrated drill body, and an adjustment groove 11 with both ends penetrating the side wall of the drill bit 1 is opened on the side wall of one end of the drill bit 1 along its tangent direction, and at the same time, a blade 2 with a cutting edge 21 is installed in the adjustment groove 11, and a clamping member 3 is provided at the other end of the drill bit 1, and the blade 2 in the adjustment groove 11 is pressed or released by the clamping member 3. When the clamping member 3 is released on the blade 2, the end of the blade 2 can extend from the adjustment groove 11 to the outside of the side wall of the drill bit 1 and can be adjusted. The blade 2 is temporarily fixed and released in the adjusting slot 11, which facilitates the movement and adjustment of the blade 2 in the adjusting slot 11, and the length of the cutting edge 21 is adjusted by the extended length of the end of the blade 2, so as to meet the drilling processing requirements of holes of different sizes, avoid the problem of frequent replacement of woodworking drills when drilling holes of different apertures, improve processing efficiency, reduce the labor burden of operators, and make it more convenient to use. At the same time, the blade 2 can be directly replaced when the cutting edge 21 is damaged, avoiding the problem of high use cost caused by overall scrapping.

[0042] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable woodworking drill, characterized in that: include: A drill bit, a blade, a clamping piece, a rod and a shank, wherein an adjustment groove penetrating both sides is provided on the side wall of one end of the drill bit along its tangent direction, a blade is arranged in the adjustment groove, and the end of the blade extends out of the adjustment groove, and at the same time, the clamping piece is arranged on the other end of the drill bit and clamps the blade, and the other end of the drill bit is connected to the rod, and at the same time, the shank is arranged at the other end of the rod, and the cross-sectional shape of the shank is arranged in a regular polygon, and the drill bit, the rod and the shank together constitute a drill body and are an integrated structure.

2. The adjustable woodworking drill according to claim 1, characterized in that: The drill bit is provided with a drill tip on the end surface of one end of the drill bit where the adjusting groove is provided and along the axial extension line thereof.

3. The adjustable woodworking drill according to claim 2, characterized in that: The drill tip is a threaded drill tip, and a cutting groove is provided on the outer wall of the drill tip along its axial direction.

4. The adjustable woodworking drill according to claim 2, characterized in that: One end of the drill bit provided with the adjusting groove is provided with a guide groove extending in an arc shape along its axial direction, one end of the guide groove extends to the tail of the drill tip, and the other end extends into the adjusting groove.

5. The adjustable woodworking drill according to claim 4, characterized in that: The adjusting groove comprises a positioning groove, an avoidance groove and a cutting groove, wherein the positioning groove is opened on the side of the drill bit along the tangent line of the drill bit and both ends thereof penetrate the side wall of the drill bit, the drill bit is away from the rod part and is located at the notch of the positioning groove. The avoidance groove connected with the positioning groove is opened, and both ends of the avoidance groove also penetrate the side wall of the drill bit, the avoidance groove is connected with the guide groove away from the side connected with the positioning groove, and the groove depth of the avoidance groove is less than the groove depth of the positioning groove and a limiting step is formed between the two, the cutting groove is opened on the groove side wall at one end of the drill bit close to the rod part and located at the groove bottom of the positioning groove, and both ends of the cutting groove penetrate the side wall of the drill bit, and the part of the drill bit close to the rod part and located at the notch of the positioning groove is separated by the cutting groove to become a clamping part, and the limiting step and the clamping part respectively press the two sides of the blade.

6. The adjustable woodworking drill according to claim 5, characterized in that A locking hole is provided on the clamping portion, and a connecting hole is provided at the bottom of the groove. At the same time, the locking hole penetrates the groove, and the locking hole and the connecting hole are coaxially arranged. The clamping piece is a locking screw, which is threadedly connected to the connecting hole after passing through the locking hole.

7. The adjustable woodworking drill according to claim 5, characterized in that: The side walls of the positioning groove that constitute the limiting step are arranged at an angle to form a first clamping surface. At the same time, the end surface of the clamping portion close to one end of the positioning groove is also arranged at an angle to form a second clamping surface, and the inclination directions of the first clamping surface and the second clamping surface are opposite. At the same time, the first clamping surface and the second clamping surface form a shrinkage structure for the notch of the positioning groove.

8. The adjustable woodworking drill according to claim 7, characterized in that: The blade is a strip-shaped structure and has a quadrilateral cross-section, a long edge of the blade is a cutting edge, and the two surfaces constituting the cutting edge are a front angle surface and a rear angle surface, an edge on the blade diagonally opposite to the cutting edge is a pressure edge, and the two surfaces constituting the pressure edge are a bottom surface and a first mating surface, and the front angle surface is connected to the first mating surface, and the rear angle surface is connected to the bottom surface, and at the same time, an inwardly concave groove is provided on the rear angle surface along its length direction, and the groove wall of the groove constitutes a second mating surface, and when the blade is installed in the adjustment groove, the cutting edge extends into the avoidance groove, and the limiting step is inserted into the groove, and at the same time, the first pressing surface is in contact with the second mating surface, and the second pressing surface is in contact with the first mating surface.

9. The adjustable woodworking drill according to claim 8, characterized in that The front angle surface is an inclined surface, and the inclination angle range of the front angle surface is 0-90°, and the rear angle surface is an arc surface or an inclined surface.

10. The adjustable woodworking drill according to claim 8, characterized in that Scales are arranged on the front angle surface of the blade and along the length direction of the blade.

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