Drill bit suitable for punching fresh and alive trees

Abstract

The utility model provides a drill bit suitable for punching fresh trees, which comprises a drilling part, a drill body part and a drill handle part, the drilling part, the drill body part and the drill handle part are sequentially distributed from top to bottom, the drilling part and the drill body part are provided with vertically communicated spiral grooves, and the spiral grooves are communicated with the outside. A spiral groove is formed in the drill body part, a main cutting edge is arranged on the boundary of the intersection of the upper end face of the drilling part and the spiral groove and distributed in the radial direction of the drilling part, a plurality of auxiliary cutting edges are arranged on the outer side wall of the drilling part and distributed in the axial direction of the drilling part, the diameter of the drill body part is N times that of the drilling part, and N is smaller than 1. According to the utility model, the drilling resistance of the drilling part can be greatly reduced, the smoothness of the hole wall can be improved, wood chips can be discharged favorably, and the drill bit is not easy to be clamped in a tree, so that the drilling efficiency is higher; and smaller power can be used for drilling the same hole, so that unnecessary energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling holes in fresh trees, in particular to a drill bit suitable for drilling holes in fresh trees. Background Art

[0002] The occurrence of diseases and pests in nature can lead to the death of trees. For thousands of years, humans have been fighting against these diseases and pests, but tree diseases and pests may occur as the natural environment changes, such as abnormal early rains and waterlogging.

[0003] At present, drilling and injecting medicine are often used to prevent pests in trees. Twist drills and auger drills are commonly used for drilling holes for forest pest prevention. Ordinary twist drills and auger drills usually have the same diameter as the drill head and the drill body, so the holes drilled in actual use are not smooth enough and generate more heat. At the same time, as the depth continues to increase, the cutting resistance becomes greater and greater. Especially when some tree species have more water, ordinary twist drills and auger drills are easy to get stuck in the trees, which leads to low drilling efficiency. Furthermore, when using twist drills, additional thrust needs to be applied, and long-term drilling requires high labor intensity. Utility Model Content

[0004] The purpose of the utility model is to provide a drill bit suitable for drilling holes in fresh trees. The utility model can greatly reduce the resistance of the drilling part when drilling holes and improve the smoothness of the hole wall, and is conducive to the discharge of wood chips. The drill bit is not easy to get stuck in the tree, so that the drilling efficiency is higher; smaller power can be used to drill the same hole, reducing unnecessary energy loss.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a drill bit suitable for drilling holes in fresh trees, characterized in that it comprises a drilling part, a drill body part and a drill shank part, the drilling part, the drill body part and the drill shank part are arranged in sequence from top to bottom, the drilling part and the drill body part are provided with spiral grooves connected up and down, and the spiral grooves are connected with the outside, a main cutting edge is provided on the boundary where the upper end face of the drilling part and the spiral groove meet, and the main cutting edge is distributed along the radial direction of the drilling part, a plurality of secondary cutting edges are provided on the outer side wall of the drilling part, and the secondary cutting edges are distributed along the axial direction of the drilling part, and the diameter of the drill body part is N times the diameter of the drilling part, and N is less than 1.

[0006] Preferably, a circumferential cutting edge is arranged on the upper outer side of the main cutting edge.

[0007] Furthermore, a self-tapping thread head coaxially distributed with the drilling portion is arranged on the upper end surface of the drilling portion, and the tip and tail angle of the automatic thread head is α, 20°≤α≤30°.

[0008] Furthermore, 0.7≤N≤0.98.

[0009] Furthermore, three auxiliary cutting edges are arranged on the outer wall of the drilling portion and are distributed along its circumferential direction, and a vertical groove that is connected to the outside and the corresponding spiral groove is arranged at the position of each auxiliary cutting edge; the first auxiliary cutting edge is located behind the main cutting edge, the second auxiliary cutting edge and the first auxiliary cutting edge are distributed in a symmetrical state in the orthographic projection in the horizontal plane, and the third auxiliary cutting edge is located directly below the first auxiliary cutting edge and a spiral groove is distributed between the two.

[0010] Furthermore, the drilling portion, the drill body portion and the drill handle portion are an integrated structure.

[0011] Furthermore, the lower portion of the drill shank is in the shape of a hexagonal prism.

[0012] The beneficial effects of the utility model are as follows: the utility model has a simple structure and is easy to manufacture; the diameter of the drilling part is larger than the diameter of the drill body, and during the drilling process, the cutting resistance will not increase with the increase of the drilling depth, which is conducive to reducing the resistance in the entire cutting process to achieve smooth cutting and is also conducive to the discharge of wood chips; the circular cutting edge performs cutting operations earlier than the main cutting edge, which is conducive to reducing the cutting resistance of the main cutting edge; the auxiliary cutting edge can be used to achieve re-cutting of the hole wall, so that the hole wall is smooth, which is conducive to assisting in reducing the drilling cutting resistance; the automatic threaded head can be used to achieve active feeding of the drilling cutting, and then there is no need to apply a thrust to the drill bit, which reduces the intensity of tree drilling operations; the vertical groove is not only conducive to the chip removal of the auxiliary cutting edge, but also has a ventilation and heat dissipation function; the spiral groove can facilitate the realization of cutting and chip removal; the hexagonal prism shape of the lower part of the drill shank is conducive to the rapid connection and disassembly of the drill bit and the power output shaft of the electric drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model 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 some preferred embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a top view of the overall structure of the utility model;

[0016] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 4It is a structural schematic diagram of the drilling part;

[0018] In the figure: 1 drilling portion, 11 main cutting edge, 12 secondary cutting edge, 121 vertical groove, 13 self-tapping thread head, 14 circumferential cutting edge, 2 drill body, 3 drill shank, 4 spiral groove. DETAILED DESCRIPTION

[0019] The following will be combined with specific embodiments and attached Figure 1-4 , the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the preferred embodiments of the utility model, not all of the embodiments. Those skilled in the art can make similar modifications without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0020] The utility model provides a drill bit suitable for drilling holes in fresh trees (such as Figure 1 As shown in the figure, the drill comprises a drilling part 1, a drill body 2 and a drill handle 3. The drilling part 1 is used to cut and drill fresh trees. The drill body 2 and the drill handle 3 are used to provide cutting power to the drilling part 1. The drilling part 1, the drill body 2 and the drill handle 3 are arranged in sequence from top to bottom. In this specific embodiment, the drilling part 1, the drill body 2 and the drill handle 3 can be an integrated structure, which is manufactured by machining technology; spiral grooves connected up and down are arranged on the drilling part 1 and the drill body 2. Groove 4, and the spiral groove 4 is connected with the outside world. In practical applications, when the utility model is used to perform drilling operations on fresh trees, as the utility model is continuously rotated, the cut trees are pushed outward by the continuous rotation of the spiral groove 4, and then the wood chips are discharged. The wood chips are continuously discharged, which is conducive to the continuous and smooth drilling. A main cutting edge 11 is provided on the boundary where the upper end surface of the drilling portion 1 and the spiral groove 4 meet, and the The main cutting edge 11 is distributed along the radial direction of the drilling portion 1, and during the drilling process, the main cutting edge 11 plays a major cutting role; a plurality of auxiliary cutting edges 12 are arranged on the outer wall of the drilling portion 1, and the auxiliary cutting edges 12 are distributed along the axial direction of the drilling portion 1. During the drilling process, the auxiliary cutting edges 12 are mainly used to realize re-cutting of the hole wall, thereby realizing smooth hole wall, and smooth hole wall is conducive to reducing drilling resistance, the diameter of the drill body 2 is N times the diameter of the drilling portion 1, N is less than 1, that is, the diameter of the drilling portion 1 is larger than the diameter of the drill body 2, so that during the drilling process, as the drilling portion 1 continues to go deeper, the probability of the drill body 2 contacting the hole wall is small, thereby ensuring that the drilling cutting resistance will not gradually increase, and then effectively avoiding the occurrence of drilling jamming phenomenon, and at the same time facilitating the effective chip removal of the spiral groove 4, in the actual processing process, the range of N is: 0.7≤N≤0.98, preferably, the value of N can be set to 0.84.

[0021] In actual application, in order to assist in reducing the resistance of the main cutting edge 11 during the wood cutting process, a circumferential cutting edge 14 is provided on the upper outer side of the main cutting edge 11. During the drilling operation, the circumferential cutting edge 14 performs circumferential cutting on the wood before the main cutting edge 11, thereby helping to reduce the cutting resistance of the main cutting edge 11 on the wood subsequently.

[0022] On the basis of the above embodiments, in order to further improve the convenience of drilling operation, a self-tapping thread head 13 coaxially distributed with the drilling part 1 is provided on the upper end face of the drilling part 1, and the tip and tail angle of the automatic thread head 13 is α, 20°≤α≤30°, and α is preferably set to 25°; during the drilling operation, the tip and tail of the automatic thread head 13 penetrate into the tree, and as the self-tapping thread head 13 continues to rotate, the spiral thread on the self-tapping thread head 13 causes the automatic thread head 13 to continuously enter the tree, thereby realizing automatic advancement of the drilling operation and improving the convenience of the drilling operation.

[0023] On the basis of the above-mentioned embodiment, a specific implementation method of implementing the plurality of the auxiliary cutting edges 12 on the drilling portion 1 is as follows: three auxiliary cutting edges 12 distributed along the circumferential direction are arranged on the outer wall of the drilling portion 1, and a vertical groove 121 intersecting with the outside and the corresponding spiral groove 4 is arranged at the position of each auxiliary cutting edge 12. When the auxiliary cutting edge 12 continuously rotates to further cut some fibers existing on the hole wall, the cut fibers directly enter the vertical groove 121 and finally enter the spiral groove 4, thereby realizing a cutting and chip removal process. At the same time, due to the vertical groove The groove 121 is interconnected with the spiral groove 4, so that the vertical groove 121 can be used to realize ventilation and heat dissipation of the drilling part 1, thereby reducing the heating phenomenon of the drilling part 1. The first auxiliary cutting edge 12 is located behind the main cutting edge 11. Specifically, the first auxiliary cutting edge 12 can be set at a position about 45° behind the circumference of the main cutting edge 11. The second auxiliary cutting edge 12 and the first auxiliary cutting edge 12 are symmetrically distributed in the orthographic projection in the horizontal plane. The third auxiliary cutting edge 12 is located directly below the first auxiliary cutting edge 12 and a spiral groove 4 is distributed between the two.

[0024] In order to facilitate the drill handle part 3 to be quickly combined with the output shaft of the electric drill so that the electric drill can drive the utility model to rotate at a high speed, the lower part of the drill handle part 3 is made into a hexagonal column shape.

[0025] In the present utility model, "upper", "lower", "front", "back", "left" and "right" are relative positions used to conveniently describe positional relationships, and therefore cannot be understood as absolute positions to limit the scope of protection.

[0026] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

[0027] The above description in combination with the accompanying drawings has detailed the preferred implementation modes and embodiments of the utility model, but the utility model is not limited to the above implementation modes and embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the concept of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A drill bit suitable for drilling holes in living trees, characterized in that: The drill comprises a drilling portion, a drill body portion and a drill shank portion, wherein the drilling portion, the drill body portion and the drill shank portion are sequentially arranged from top to bottom, and spiral grooves communicating with each other are arranged on the drilling portion and the drill body portion, and the spiral grooves are connected with the outside world, and a main cutting edge is arranged on the boundary where the upper end surface of the drilling portion and the spiral groove meet, and the main cutting edge is arranged along the radial direction of the drilling portion, and a plurality of secondary cutting edges are arranged on the outer side wall of the drilling portion, and the secondary cutting edges are arranged along the axial direction of the drilling portion, and the diameter of the drill body portion is N times the diameter of the drilling portion, and N is less than 1.

2. A drill bit suitable for drilling holes in living trees according to claim 1, characterized in that: A circumferential cutting edge is arranged on the upper outer side of the main cutting edge.

3. A drill bit suitable for drilling holes in living trees according to claim 2, characterized in that The upper end surface of the drilling portion is provided with a self-tapping thread head coaxially distributed with the drilling portion, and the tip and tail angle of the self-tapping thread head is α, 20°≤α≤30°.

4. A drill bit suitable for drilling holes in living trees according to claim 2, characterized in that: 0.7≤N≤0.98。 5. A drill bit suitable for drilling holes in living trees according to claim 2, 3 or 4, characterized in that The outer wall of the drilling portion is provided with three auxiliary cutting edges distributed along its circumferential direction, and a vertical groove which is connected with the outside and the corresponding spiral groove is provided at the position of each auxiliary cutting edge; the first auxiliary cutting edge is located behind the main cutting edge, the second auxiliary cutting edge and the first auxiliary cutting edge are distributed in a symmetrical state in the orthographic projection in the horizontal plane, and the third auxiliary cutting edge is located directly below the first auxiliary cutting edge and a spiral groove is distributed between the two.

6. A drill bit suitable for drilling holes in living trees according to claim 1, characterized in that: The drilling part, the drill body part and the drill handle part are an integrated structure.

7. A drill bit suitable for drilling holes in living trees according to claim 6, characterized in that: The lower part of the drill handle is in the shape of a hexagonal column.

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