CN220241772U - Counter bore drill bit structure - Google Patents

Abstract

The utility model discloses a counter bore drill bit structure which comprises a drill handle and a twist drill bit arranged on the drill handle, wherein a rolling bearing is sleeved on the drill handle, an inner ring of the rolling bearing is tightly matched with the drill handle, a connecting block is fixed on an outer ring of the rolling bearing, the twist drill bit is connected to the rolling bearing, and an outer cover is arranged on the connecting block. The utility model can better prevent the phenomenon of wood dust splashing on the basis of keeping a simple and reasonable structure, reduce the influence on normal drilling work and greatly improve the drilling precision.

Description

Counter bore drill bit structure

Technical Field

The utility model relates to the technical field of drilling tools, in particular to a counter bore drill bit structure.

Background

The known counter bore processing is also an important component part in the current hole processing, and the common counter bore drill on the market at present mainly has the phenomenon that chip removal is not smooth and wood is easy to blacken due to overheating, and meanwhile, the depth of the drilled hole is not adjustable, and the processing depth can be controlled only through manual control.

Countersunk drill bits (also called countersunk holes) are thus present, the length of which can be adjusted, commonly used for concealed screw drilling. The counter bore drill bit is often used for processing counter bores, and the effect of counter bores is to enable the screw head to be embedded into the part, and the appearance and the external structure of the part are not affected due to the fact that the excess part is not generated. Countersunk drill bits typically include a countersunk head column provided with a blade, a mounting shank to which a drive mechanism is attached, a twist drill, and the like. For example, in the chinese patent with the publication number CN217913005U, a countersink drill bit is provided, in which the conical drill body is provided with a plane bearing, and the plane bearing can drive the positioning ring to rotate while rotating, however, for only one drill body in the drilling process, the drill body can cause wood dust to splash everywhere easily, which affects the accuracy of drilling, and is unfavorable for normal drilling work, and thus there is a need for improvement.

Disclosure of Invention

First, the technical problems to be solved

Aiming at the defects in the prior art, the utility model provides a counter bore drill bit structure which can better prevent the phenomenon of wood dust splashing on the basis of keeping a simple and reasonable structure, reduce the influence on normal drilling work and greatly improve the drilling precision.

(II) technical problem to be solved

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a counter bore drill bit structure, is in including the drill shank and setting fluted drill bit on the drill shank, the cover is equipped with antifriction bearing on the drill shank, antifriction bearing's inner circle with the drill shank is close fit, antifriction bearing's outer lane is fixed with the connecting block, antifriction bearing is last to be connected with fluted drill bit, just be provided with the dustcoat on the connecting block.

Preferably, the outer cover is made of transparent material.

Preferably, the outer cover comprises a cover body arranged at one end of the connecting block, the cover body is in a horn shape, the cover body is in clearance fit with one end of the connecting block, and a sealing gasket is arranged between one end of the connecting block and the cover body.

Preferably, the inner ring of the rolling bearing is in interference fit with the drill shank.

Preferably, the twist drill comprises a drill bit and a middle part arranged on the drill bit, wherein the middle part is provided with a mounting part, the mounting part is arranged in the rolling bearing, and the drill bit, the middle part and the mounting part are all integrally formed.

Preferably, the outer diameter of the intermediate portion is larger than the outer diameter of the drill bit, and the outer diameter of the mounting portion is larger than the outer diameter of the intermediate portion.

Preferably, chip grooves are formed in the outer surface of the middle portion at intervals, and the chip grooves are arranged in an arc shape.

(III) technical effects to be achieved

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

firstly, the rolling bearing is sleeved on the drill shank, the inner ring of the rolling bearing is tightly matched with the drill shank, the connecting block is fixed on the outer ring of the rolling bearing, the twist drill bit is connected to the rolling bearing, and the outer cover is arranged on the connecting block.

The cover comprises a cover body arranged at one end of the connecting block, the cover body is in a horn shape, the cover body is in clearance fit with one end of the connecting block, and a sealing gasket is arranged between one end of the connecting block and the cover body.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is a schematic overall view of the present utility model.

Fig. 3 is a schematic perspective view of the present utility model.

In the figure: 1, a drill shank; 2, a twist drill; 3, rolling bearings; 4, connecting blocks; 5, an outer cover; 21, a drill bit; 22, an intermediate portion; 23, an installation part; 51, a cover body; 221, junk slots.

Detailed Description

In the description of the present utility model, it should be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected or indirectly connected to the other element.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of description and simplicity of description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two original parts. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

Embodiment one: referring to fig. 1, a counter bore drill bit structure comprises a drill shank 1 and a twist drill bit 2 arranged on the drill shank 1, wherein a rolling bearing 3 is sleeved on the drill shank 1, an inner ring of the rolling bearing 3 is tightly matched with the drill shank 1, a connecting block 4 is fixed on an outer ring of the rolling bearing 3, the twist drill bit 2 is connected to the rolling bearing 3, and an outer cover 5 is arranged on the connecting block 4. When the drilling machine is used, the outer cover 5 can be favorable for avoiding messy base of saw dust in the drilling process through the twist drill 2 in the drilling process, so that the influence on normal drilling work is reduced, and the drilling precision is greatly improved.

Embodiment two: it will be explained on the basis of the first embodiment that the cover 5 is made of a transparent material, as shown in fig. 2 and 3, which is advantageous for viewing the internal condition when in use. It is to be noted that, the dustcoat 5 is including setting up the cover body 51 on connecting block 4 one end, the cover body 51 is loudspeaker shape, just the cover body 51 with connecting block 4 one end is clearance fit, just connecting block 4 one end with be provided with sealed the pad between the cover body 51, be favorable to both to connect inseparabler like this, avoid appearing the problem that drops, and loudspeaker shape's cover body 51 is favorable to being fit for avoiding the indiscriminate base phenomenon of saw-dust more in the drilling process. The outer cover 5 is made of a material with sub-cloth force, so that the production and manufacturing cost is low, the hardness of the outer cover is not too high, paint on the surface of an object at a drilling part is not easy to fall off in the use process, damage to the paint on the surface of the object is reduced, and the outer cover 5 is high, so that the outer cover 5 can be blocked by the object in the process of downwards drilling the twist drill 2, the drilling depth is limited, the requirement of the required drilling depth is met, and the use requirement is met.

Embodiment three; the first or second embodiments may be described, as shown in fig. 1, in which the inner ring of the rolling bearing 3 is in interference fit with the drill shank 1, and this arrangement makes the connection between the two more stable, which is more beneficial to meeting the use requirement.

Embodiment four: it can be explained on the basis of the first embodiment, the second embodiment or the third embodiment, as shown in fig. 2 and fig. 3, the twist drill 2 includes a drill 21 and a middle portion 22 disposed on the drill 21, a mounting portion 23 is disposed on the middle portion 22, the mounting portion 23 is mounted in the rolling bearing 3, and the drill 21, the middle portion 22 and the mounting portion 23 are integrally formed, so that the firmness of the twist drill 2 is improved, the damage rate of the twist drill 2 is reduced, the outer diameter of the middle portion 22 is larger than the outer diameter of the drill 21, and the outer diameter of the mounting portion 23 is larger than the outer diameter of the middle portion 22, so that the twist drill 2 is stepped, and the problem that the twist drill 2 is unstable due to too large diameter change is advantageously reduced. It is further to be noted that, in order to promote the drill bit 21 to remove chips during the drilling process, chip grooves 221 are provided on the outer surface of the middle portion 22 at intervals, and the chip grooves 221 are provided in an arc shape, which is beneficial to better remove chips during the drilling process, thereby being beneficial to better performing accurate drilling.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present utility model is not limited thereby. Therefore, based on the innovative concepts of the present utility model, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solutions directly or indirectly to other relevant technical fields, all of which are included in the scope of protection of the present patent.

Claims (7)

1. The utility model provides a counter bore drill bit structure, includes drill shank (1) and sets up fluted drill bit (2) on drill shank (1), its characterized in that: the improved twist drill is characterized in that a rolling bearing (3) is sleeved on the drill handle (1), an inner ring of the rolling bearing (3) is tightly matched with the drill handle (1), a connecting block (4) is fixed on an outer ring of the rolling bearing (3), the twist drill (2) is connected to the rolling bearing (3), and an outer cover (5) is arranged on the connecting block (4).

2. The counter bore bit structure of claim 1, wherein: the outer cover (5) is made of transparent materials.

3. The counter bore bit structure of claim 1 or 2, wherein: the outer cover (5) comprises a cover body (51) arranged at one end of the connecting block (4), the cover body (51) is in a horn shape, the cover body (51) is in clearance fit with one end of the connecting block (4), and a sealing gasket is arranged between one end of the connecting block (4) and the cover body (51).

4. The counter bore bit structure of claim 1 or 2, wherein: the inner ring of the rolling bearing (3) is in interference fit with the drill shank (1).

5. The counter bore bit structure of claim 1, wherein: the twist drill (2) comprises a drill (21) and a middle part (22) arranged on the drill (21), wherein an installation part (23) is arranged on the middle part (22), the installation part (23) is installed in the rolling bearing (3), and the drill (21), the middle part (22) and the installation part (23) are integrally formed.

6. The counter bore bit structure of claim 5, wherein: the outer diameter of the middle part (22) is larger than the outer diameter of the drill bit (21), and the outer diameter of the mounting part (23) is larger than the outer diameter of the middle part (22).

7. The counter bore bit structure of claim 5 or 6, wherein: the middle part

Junk slots (221) are arranged on the outer surface of the part (22) at intervals, the junk slots (221),

is arc-shaped.