CN212526198U

CN212526198U - Detachable drill bit

Info

Publication number: CN212526198U
Application number: CN202020233075.5U
Authority: CN
Inventors: 吴红光; 殷绍翔
Original assignee: Ningbo Rongke Maite Nc Tools Co ltd
Current assignee: Ningbo Rongke Maite Nc Tools Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2021-02-12
Anticipated expiration: 2030-02-28

Abstract

The utility model provides a can dismantle drill bit belongs to drilling machine cutter technical field, include: the end part of the rod body is provided with a first connecting end; a cutting edge end and a second connecting end are respectively formed at two ends of the cutter head, and the second connecting end is detachably connected with the first connecting end; the screw is connected with the rod body and the cutter head so as to fix the cutter head on the rod body, a first connecting hole is formed in the first connecting end along the axial direction of the rod body, a second connecting hole is formed in the second connecting end along the axial direction of the cutter head, the second connecting hole is aligned with the first connecting hole, and the screw penetrates through the second connecting hole and the first connecting hole. The utility model has the advantages that: the rod body and the cutter head are of detachable structures, so that the cutter head can be conveniently replaced, and the using efficiency of the drill bit is improved.

Description

Detachable drill bit

Technical Field

The utility model belongs to the technical field of the drilling machine cutter, a can dismantle drill bit is related to.

Background

The drill bit is a tool which is very commonly used, and can be applied to a drilling machine and a pistol drill, and for the tool, once the tool is worn or the cutting edge is damaged, the tool needs to be replaced, so that the durability is poor, and the working efficiency is reduced by frequently replacing the drill bit.

At present, some drill bits adopt special structures for improving durability and centering capacity, for example, a Chinese patent with application number 01220344.0 discloses a multi-point multi-edge gang drill, the drill point part of which comprises a drill point (24), two arc edge points (25) and two chip-dividing edge points (26); two outer blades (27), two arc blades (28), two inner blades (29), a horizontal blade (31) and a chip-dividing blade (30). In order to make the group drill suitable for the industrialized mechanical sharpening, the cross section of a chip dividing groove (22) ground on the rear face (32) of one side outer edge is a V-shaped groove with a circular arc bottom, and the circular arc radius R of the circular arc edge is enlarged to enable the ratio of the circular arc radius R to the diameter d of the drill bit to be 0.11-0.15.

However, when the drill bit is damaged, it is still troublesome to remove and replace the drill bit with a new one, so that there is a room for improvement.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, a can dismantle drill bit has been proposed.

The purpose of the utility model can be realized by the following technical proposal: a detachable drill bit, comprising:

the end part of the rod body is provided with a first connecting end;

the cutter head is provided with a cutting edge end and a second connecting end at two ends respectively, and the second connecting end is detachably connected with the first connecting end;

the screw is connected with the rod body and the cutter head so as to fix the cutter head on the rod body, a first connecting hole is formed in the first connecting end along the axial direction of the rod body, a second connecting hole is formed in the second connecting end along the axial direction of the cutter head, the second connecting hole is aligned with the first connecting hole, and the screw penetrates through the second connecting hole and the first connecting hole.

Preferably, the number of the screws, the first connecting holes and the second connecting holes is two.

Preferably, the first connecting end is provided with a first tooth surface portion, the second connecting end is provided with a second tooth surface portion, and the first tooth surface portion is meshed with the second tooth surface portion.

Preferably, the number of the first tooth surface portions and the number of the second tooth surface portions are two, the two first tooth surface portions are located on two sides of the first connecting end, and the two second tooth surface portions are located on two sides of the second connecting end.

Preferably, the tooth spaces of the first tooth surface portion and the second tooth surface portion are both triangular pyramidal tooth space structures.

Preferably, a first chip guide groove is formed in the rod body, a second chip guide groove is formed in the cutter head, and the first chip guide groove is communicated with the second chip guide groove.

Preferably, the blade end is provided with an outer blade, an arc blade and an inner blade from outside to inside, and an arc blade tip is formed between the outer blade and the arc blade.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the rod body and the cutter head are of detachable structures, so that the cutter head can be conveniently replaced, and the using efficiency of the drill bit is improved.

2. After having set up first flank portion and second flank portion, can make both meshings to confirm specific mounted position and realize the positioning action, after the dismantlement installation, can not reduce the precision of tool bit.

3. The tooth's socket of first flank portion and second flank portion all is the tooth's socket of three pyramid forms for tooth's socket outside-in becomes shallow gradually, and the tooth's socket degree of depth in the outside that first flank portion and second flank portion correspond is deepest, helps first flank portion and second flank portion meshing like this, makes the edge of tool bit and the better location of the edge of the body of rod and combines together.

Drawings

Fig. 1 is an explosion diagram of the detachable drill of the present invention.

Fig. 2 is a schematic structural view of the detachable drill of the present invention.

Fig. 3 is a schematic structural diagram of the second connection end of the present invention.

Fig. 4 is a schematic structural diagram of the blade end of the present invention.

In the figure, 100, a rod body; 110. a first connection end; 120. a first connection hole; 130. a first tooth surface portion; 140. a first chip guide groove; 200. a cutter head; 210. a blade end; 211. an outer blade; 212. a circular arc edge; 213. an inner blade; 214. an arc nose; 220. a second connection end; 230. a second connection hole; 240. a second flank portion; 250. a second chip guide groove; 300. and (4) screws.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 4, a detachable drill includes: the rod body 100, the cutter head 200 and the connecting piece can connect the rod body 100 and the cutter head 200 together through the connecting piece, so that the detachable connection of the rod body 100 and the cutter head 200 is realized, when the drill bit is replaced, only the cutter head 200 needs to be detached alone, then a new cutter head 200 is replaced, the difficulty of replacing the drill bit is reduced, and the working efficiency is improved.

Specifically, the end of the rod 100 is provided with a first connection end 110; the first connection end 110 is an end face structure of the rod body 100, and a first connection hole 120 is formed in the first connection end 110 along the axial direction of the rod body 100; a blade end 210 and a second connection end 220 are respectively formed at two ends of the cutter head 200, the second connection end 220 is detachably connected with the first connection end 110, and a second connection hole 230 is formed in the second connection end 220 along the axial direction of the cutter head 200; the blade end 210 is used for drilling, and the second connecting end 220 is used for matching with the first connecting end 110, so that the cutter head 200 is detachably connected to the rod body 100.

A screw 300 coupled to the rod 100 and the cutter head 200 to fix the cutter head 200 to the rod 100, wherein the second coupling hole 230 is aligned with the first coupling hole 120, and the screw 300 passes through the second coupling hole 230 and the first coupling hole 120.

Preferably, since the first connection end 110 and the second connection end 220 cannot be directly fixed together, a connection member is required to be fixed, and the connection member may have various structures, and the simplest structure is the connection by the screw 300, or other members for fixing the first connection end 110 and the second connection end 220 together may be adopted.

Preferably, with the above structure, the rod body 100 and the cutter head 200 are detachable, so that the cutter head 200 can be conveniently replaced, thereby improving the use efficiency of the drill.

Preferably, the connecting member is a screw 300, wherein the first connecting hole 120 is formed along the axial direction of the rod body 100, the first connecting hole 120 is of a threaded hole structure, the second connecting hole 230 is of a through hole structure, or alternatively of a threaded hole structure, and the screw passes through the second connecting end 220 from the blade end 210, so that the second connecting hole 230 is communicated with the first connecting hole 120, and the screw 300 passes through the second connecting hole 230 and the first connecting hole 120, so that the cutter head 200 and the rod body 100 can be connected together, thereby achieving the effect of quick installation and fixation.

As shown in fig. 1, 2, 3 and 4, in addition to the above embodiments, the number of the screws 300, the first connection holes 120 and the second connection holes 230 is two.

Preferably, the two first connection holes 120 are respectively disposed at both sides of the rod body 100 and symmetrically disposed, and the two second connection holes 230 are respectively disposed at both sides of the cutter head 200 and symmetrically disposed, so that the connection between the cutter head 200 and the rod body 100 is more reliable, and the balance of stress between the cutter head 200 and the rod body 100 is ensured.

As shown in fig. 1, 2, 3 and 4, in addition to the above embodiments, the first connecting end 110 is provided with a first tooth surface portion 130, the second connecting end 220 is provided with a second tooth surface portion 240, and the first tooth surface portion 130 is engaged with the second tooth surface portion 240.

Preferably, the first flank portion 130 and the second flank portion 240 can be engaged together to perform a positioning function, and particularly, when the tool bit 200 is connected to the rod body 100, the mounting accuracy of the two parts needs to be ensured, and if the first flank portion 130 and the second flank portion 240 are lacked, although the rod body 100 and the tool bit 200 can be assembled together, the accuracy is greatly affected, and the machining accuracy is reduced.

When the first and second

tooth surface portions

130 and 240 are provided, they can be engaged with each other to confirm a specific mounting position and perform a positioning function, and the accuracy of the tool bit 200 is not lowered after the mounting and dismounting.

As shown in fig. 1, 2, 3, and 4, in addition to the above embodiments, the number of the first tooth surface portions 130 and the second tooth surface portions 240 is two, two first tooth surface portions 130 are located on two sides of the first connection end 110, and two second tooth surface portions 240 are located on two sides of the second connection end 220.

Preferably, in order to improve the positioning accuracy, the number of the first tooth surface portions 130 and the second tooth surface portions 240 is especially set to two, and in an actual structure, the first tooth surface portions 130 and the second tooth surface portions 240 are both in a fan-shaped structure, the two first tooth surface portions 130 are symmetrically arranged, the two second tooth surface portions 240 are also symmetrically arranged, and in the specific positioning, the teeth on the two first tooth surface portions 130 are engaged with the teeth on the second tooth surface portions 240, so that the positioning is realized, and then the fixing can be performed by the screws 300.

As shown in fig. 1 and 3, in the above embodiment, the tooth grooves of the first tooth surface portion 130 and the second tooth surface portion 240 have a triangular pyramidal tooth groove structure.

Preferably, each of the first and second

tooth flank portions

130 and 240 has teeth, wherein each tip end surface of the first tooth flank portion 130 is located on the same plane, each tip end surface of the second tooth flank portion 240 is located on the same plane, and the tooth spaces of the first and second

tooth flank portions

130 and 240 are triangular tooth spaces, such that the tooth spaces are gradually shallower from outside to inside, and the depth of the tooth space on the corresponding outer sides of the first and second

tooth flank portions

130 and 240 is deepest, which facilitates the engagement between the first and second

tooth flank portions

130 and 240, so that the edge of the tool bit 200 and the edge of the rod body 100 are better positioned and combined together.

As shown in fig. 1, 2, 3 and 4, in addition to the above-described embodiments, first chip guide grooves 140 are provided in the rod body 100, second chip guide grooves 250 are provided in the tool bit 200, and the first chip guide grooves 140 communicate with the second chip guide grooves 250.

Preferably, the drill is provided with a chip guide groove for guiding out the drilled metal chips, wherein the chip guide groove includes two parts, i.e., a first chip guide groove 140 and a second chip guide groove 250, and when the tool bit 200 is mounted on the rod body 100, the first chip guide groove 140 and the second chip guide groove 250 form the entire chip guide groove.

It is worth noting here that the second chip guide groove 250 of the tool head 200 is a notch-like structure, which divides the second connecting end 220 into two fan-shaped structures, and the second tooth surface portion 240 is located on the two fan-shaped structures.

As shown in fig. 1, 2, 3, and 4, in the above embodiment, the cutting edge end 210 is provided with an outer cutting edge 211, an arc cutting edge 212, and an inner cutting edge 213 from the outside to the inside, and an arc cutting edge 214 is formed between the outer cutting edge 211 and the arc cutting edge 212.

Preferably, in order to improve the working efficiency, the centering capability and the working effect of the drill, the blade end 210 is particularly arranged in a group blade structure, and it is worth to be noted that, the number of the outer blades 211, the circular arc blades 212 and the inner blades 213 are two and symmetrically arranged, and a chisel blade located at the center of the drill point is formed between the two inner blades 213, so that a seven-blade structure is formed; an arc cutter point 214 is formed between the two outer blades 211 and the two arc blades 212, and a drill point is formed on the chisel edge, so that a three-point structure is formed, the working efficiency of the drill can be greatly improved, and the durability is greatly improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A detachable drill bit, comprising:

the end part of the rod body is provided with a first connecting end;

2. A detachable drill bit according to claim 1, characterized in that: the number of the screws, the first connecting holes and the second connecting holes is two.

3. A detachable drill bit according to claim 1, characterized in that: the first connecting end is provided with a first tooth surface portion, the second connecting end is provided with a second tooth surface portion, and the first tooth surface portion is meshed with the second tooth surface portion.

4. A detachable drill bit according to claim 3, characterized in that: the number of the first tooth surface parts and the number of the second tooth surface parts are two, the two first tooth surface parts are located on two sides of the first connecting end, and the two second tooth surface parts are located on two sides of the second connecting end.

5. A detachable drill bit according to claim 3, characterized in that: the tooth grooves of the first tooth surface part and the second tooth surface part are both triangular pyramidal tooth groove structures.

6. A detachable drill bit according to claim 1, characterized in that: the rod body is provided with a first chip guide groove, the cutter head is provided with a second chip guide groove, and the first chip guide groove is communicated with the second chip guide groove.

7. A detachable drill bit according to claim 1, characterized in that: the blade end is provided with an outer blade, an arc blade and an inner blade from outside to inside, and an arc blade tip is formed between the outer blade and the arc blade.