Replaceable combined flat drill structure

Abstract

The utility model relates to a replaceable combined flat drill structure which is characterized by comprising a handle part and a flat cutter part formed at the front part of the handle part, the front portion of the flat knife portion extends inwards from the two side portions to form two shoulder portions, the two shoulder portions continue to be folded and extend inwards and upwards to form two gathering portions respectively, and a pinnacle is formed at the top of the flat knife portion. The flat knife part is provided with a first side part and a second side part which are parallel to each other; the cutter is characterized by comprising a side shoulder blade, a groove structure is formed in the side face of a flat cutter part of the flat drill structure and used for installing a side shoulder blade structure. The side shoulder blade structure can form a three-tip flat drill structure at the side part of the flat cutter part extending from the end part, or the whole side shoulder blade structure is locked in the groove to form a single-tip flat drill structure; the detachable structure is adopted for the side shoulder edge, the side shoulder edge can be replaced in time under the condition that the side shoulder edge of the three-tip flat drill is damaged, the whole flat drill does not need to be scrapped, and resources are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flat drill structure field especially relates to a replaceable combined flat drill structure. BACKGROUND

[0002] Flat drills are usually a kind of woodworking drilling tools. The drill is easy to control the depth of the hole, so it is suitable for drilling shallow holes and through holes, so it is widely used in wood materials or other similar materials.

[0003] In the common three-point flat drill structure, the blade at the end angle position is the most likely to be knocked, and it is also the most likely to be damaged in the process of processing wood. Once damaged, the entire three-point flat drill structure will be scrapped. Therefore, in order to prevent resource waste, a replaceable combined flat drill structure is needed, which can replace the damaged blade at the end angle of the flat drill, reducing resource waste. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a replaceable combined flat drill structure, which can solve the problem that the shoulder blade of the three-point flat drill in the general flat drill structure cannot be adjusted and replaced, and once damaged, the whole is scrapped, resulting in resource waste.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a replaceable combined flat drill structure, comprising a handle part, and a flat blade part formed at the front part of the handle part; the front part of the flat blade part extends inward from both sides, forming two shoulder parts, a first shoulder part and a second shoulder part, the two shoulder parts continue to extend inward and upward, forming two converging parts, a first converging part and a second converging part, and a pointed top at the top; the flat blade part has two first side parts and second side parts parallel to each other; the innovation point is that it comprises a side shoulder blade;

[0006] The first side part and the second side part are provided with a groove along the length direction of the two sides of the flat blade part, and the end of the groove extends to the first shoulder part and the second shoulder part; a plurality of screw holes are arranged at equal intervals in the groove;

[0007] The side shoulder blade has a pair of sharp end blades; the two side shoulder blades are arranged in the groove of the first side part and the groove of the second side part respectively; a plurality of positioning holes are arranged at equal intervals on the side shoulder blade along the extension direction, and the side shoulder blade is locked in the groove by screws, the position of the positioning hole on the side shoulder blade is selected to control the length of the sharp end blade of the side shoulder blade extending out of the first side part and the second side part, and the flat blade part forms a single-point flat drill structure or a three-point flat drill structure.

[0008] Further, a first chamfer is arranged between the first shoulder and the first side, and a second chamfer is arranged between the second shoulder and the second side; the first chamfer and the second chamfer are both 45° chamfers.

[0009] Further, a first groove is formed in the blade part of the first shoulder to the inside of the chisel part, an inner edge of the first groove is inclined downward to the outside of the first shoulder to form a first inclined surface, and the inner edge of the first groove is parallel to the first shoulder; an outer edge of the first groove is inclined downward to the inside of the first shoulder to form a second inclined surface, the first inclined surface intersects the second inclined surface to form the first groove, and the outer edge of the first groove is parallel to the first shoulder; a second groove is formed in the blade part of the first converging part to the inside of the chisel part, and an end of the first groove is communicated with an end of the second groove; the first groove and the second groove form a chip removal groove structure.

[0010] Further, the chisel part has a front surface and a back surface, the first shoulder and the first converging part of the front surface form a blade part of the first shoulder and a blade part of the first converging part of the front surface respectively, and the second shoulder and the second converging part of the back surface form a blade part of the second shoulder and a blade part of the second converging part of the back surface respectively; the front surface and the back surface of the chisel part are the same, and a process hole is arranged on the chisel part.

[0011] The utility model has the advantages that:

[0012] 1) In the utility model, the groove structure is arranged on the side surface of the chisel part of the flat drill structure to install the side shoulder blade structure; the side shoulder blade structure is arranged at a position, and when the side part of the chisel part extends from the end, a three-point flat drill structure can be formed, or the whole chisel part is locked in the groove to form a single-point flat drill structure; the side shoulder blade adopts the detachable structure, so that the side shoulder blade of the three-point flat drill can be replaced in time when the side shoulder blade is damaged, and the whole flat drill does not need to be scrapped, so that resources are saved. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model will be further explained in detail in combination with the drawings and the specific embodiment.

[0014] Figure 1 It is a top view of the replaceable combined flat drill structure of the utility model.

[0015] Figure 2 It is a side view of the replaceable combined flat drill structure of the utility model. CONCRETE EMBODIMENT

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0018] As Figure 1 Figure 2 The utility model discloses a replaceable combined flat drill structure, including handle 1 and the flat sword department 2 formed in the front part of handle, the front part of flat sword department 2 extends from both sides respectively to the inside, forms two shoulder parts 3, first shoulder part 31 and second shoulder part 32, two shoulder parts continue to draw and extend to the inside upwards respectively, form two converging parts 4, first converging part 41 and second converging part 42, and form a pointed top at the top.

[0019] First side 21 and second side 22 are provided with a recess along the length direction of both sides of flat sword department, and the end of recess extends to first shoulder part 31 and second shoulder part 32, and a plurality of screw holes are arranged in the recess at equal intervals.

[0020] Side shoulder blade 5 has a pair, and one end of side shoulder blade 5 is pointed blade edge, two side shoulder blades 5 are arranged in the recess of first side 21 and the recess of second side 22 respectively, a plurality of positioning holes are arranged on side shoulder blade 5 at equal intervals along the extension direction, and side shoulder blade 5 is locked in the recess through screw, by selecting the position of positioning hole locking on side shoulder blade 5, the length of pointed blade edge of side shoulder blade 5 extending out of first side 21 and second side 22 is controlled, and the single pointed flat drill structure or three pointed flat drill structure formed by flat sword department 2 is realized.

[0021] First shoulder part 31 and first side 21 are provided with first chamfer, and second shoulder part 32 and second side 22 are provided with second chamfer, and the first chamfer and the second chamfer are both 45 ° chamfer.

[0022] The blade portion of the first shoulder portion 31 forms a first groove 33 towards the inside of the flat drill portion 2, the inner edge of the first groove is inclined downwards towards the outside of the first shoulder portion to form a first inclined surface, and the inner edge of the first groove is parallel to the first shoulder portion 31; the outer edge of the first groove 33 is inclined downwards towards the inside of the first shoulder portion 31 to form a second inclined surface, the first inclined surface and the second inclined surface intersect to form the first groove, and the outer edge of the first groove 33 is parallel to the first shoulder portion; the blade portion of the first converging portion forms a second groove 43 towards the inside of the flat drill portion, and the end of the first groove 33 is communicated with the end of the second groove 43; the first groove 33 and the second groove 43 form a chip removal groove structure.

[0023] The flat drill portion 2 has a front surface and a back surface, the first shoulder portion 31 and the first converging portion 41 of the front surface form the blade portion of the first shoulder portion 31 and the blade portion of the first converging portion 41 respectively, and the second shoulder portion 32 and the second converging portion 42 of the back surface form the blade portion of the second shoulder portion and the blade portion of the second converging portion respectively; the front surface and the back surface of the flat drill portion are the same, and the flat drill portion is provided with a process hole 23.

[0024] The working principle of the utility model is: recess structure is set up on the side of the flat drill structure for installing the side shoulder blade structure; the position of the side shoulder blade structure is selected, when the side of the flat drill portion extending from the end portion, three-point flat drill structure can be formed, or the whole is locked in the recess to form single-point flat drill structure; the side shoulder blade adopts this detachable structure, in the case that the side shoulder blade of the three-point flat drill is damaged, it can be replaced in time, without scrapping the whole flat drill, resources are saved.

[0025] The skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, under the premise that the utility model is not deviated from the spirit and scope, the utility model will have various changes and improvements, and these changes and improvements all fall into the scope of the utility model claimed.

Claims

1. A replaceable combination flat drill structure comprising a shank and a flat chisel portion formed at the front of the shank; the front of the flat chisel portion extends inwardly from both side portions to form two shoulder portions, a first shoulder portion and a second shoulder portion, the two shoulder portions continue to extend inwardly and upwardly to form two converging portions, a first converging portion and a second converging portion, respectively, and form a pointed top at the top; the flat chisel portion has two first side portions and second side portions parallel to each other; characterized in that: The side shoulder blade is provided with a pair of pointed blade edges. The first side and the second side are provided with a groove along the length direction of the two sides of the flat blade part, and the end of the groove extends to the first shoulder and the second shoulder; a plurality of screw holes are provided in the groove at equal intervals; The side shoulder blade is provided with a pair of pointed blade edges.

2. A replaceable modular chisel bit according to claim 1, wherein: The first shoulder and the second shoulder are provided with a first chamfer and a second chamfer, respectively.

3. The replaceable modular chisel bit of claim 1 wherein: The blade part of the first shoulder forms a first groove towards the inside of the flat blade part, the inner edge of the first groove is inclined downward towards the outside of the first shoulder to form a first inclined surface, and the inner edge of the first groove is parallel to the first shoulder; the outer edge of the first groove is inclined downward towards the inside of the first shoulder to form a second inclined surface, the first inclined surface intersects with the second inclined surface to form the first groove, and the outer edge of the first groove is parallel to the first shoulder; the blade part of the first converging part forms a second groove towards the inside of the flat blade part, and the end of the first groove is communicated with the end of the second groove; the first groove and the second groove form a chip removal groove structure.

4. The replaceable modular chisel bit of claim 1 wherein: The flat blade part is provided with a front surface and a back surface, the first shoulder and the first converging part of the front surface form the blade part of the first shoulder and the blade part of the first converging part, respectively, and the second shoulder and the second converging part of the back surface form the blade part of the second shoulder and the blade part of the second converging part, respectively; the front surface and the back surface of the flat blade part are the same in characteristics, and the flat blade part is provided with a process hole.

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