ES1235497U - Drill bit with highlights in the capture area (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Drill bit with projections in the capture zone that consists of a special conformation of its capture zone to prevent, during the drilling process, its slippage is registered with respect to the chuck, characterized by being drills (1) with an area of cut (1.1) with main diameter D1 (3) and a capture zone (1.2) with diameter capture zone D2 (4) that have one or more projections (2) in the capture zone (1.2). (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Drill bit with highlights in the capture area.

Technical object of the invention

The present invention relates to an improvement applicable to any type of drill bits and especially to those drill bits that work in very demanding conditions in perforations of hard materials, whether metallic, stone, concrete, ceramic and the like coupled to industrial machines equipped with the usual chucks . The design of its rod, in the capture area, ensures a perfect grip in the turning movement preventing slippage or slipping with respect to the chucks of the chuck.

Sector of the technique to which the invention relates

The invention falls within the Section of Various Industrial Techniques, Conformation Section, Paragraph of industrial and DIY tools.

From the industrial point of view it affects the manufacture of accessories and hardware tools for use in drilling operations of all types of materials.

Background of the invention

The drills normally supplied in the branch market are cylindrical tools of a single diameter in which a cutting zone and a capture zone are clearly differentiated. However, for relatively large perforations, drill bits are also provided in which the capture zone has a diameter smaller than the cut zone. In this way, the capture is facilitated by means of the usual drill chucks but the possible sliding of the drill bit inside the drill chuck is not avoided in very demanding working conditions.

To avoid this inconvenience, solutions are known in which the capture zone has polygonal sections, mainly hexagonal, which adapt well to the most common chucks normally provided with three claws.

There are also types of chucks that include claws or jaws with striated contact surfaces to favor grip.

However, there are no known drill solutions with protrusions that ensure the perfect solidarity of drill bits and chucks being that the idea that has prompted the inventor to present this configuration of the area of capture of the drill that meets very interesting novelty characteristics, especially for very demanding working conditions in perforations on hard materials.

Summary Description of the Invention

The present invention relates to a special conformation of the capture zone of all types of drill bits to prevent the slipping of the drill chuck during the drilling process.

In all drilling works, it is usual to work with drill bits that are inserted into a drill chuck or a head equipped with claws that capture the drill by its rod and retain it by pressure of said claws.

It happens, sometimes, that due to not having sufficiently tightened the drill bit or due to the vibrations that occur in the drilling process, a slight loosening of the tightening is recorded and consequently the slipping of the drill shaft inside the chuck that starts It sustains her.

Given this circumstance, which is often repeated, the inventor has devised a solution that guarantees a good grip of the chuck on the drill bit preventing its relative slippage even if the clamping of the claws is slightly reduced.

The solution is to provide the cane of the drill with one or several tabs that extend longitudinally on its lateral surface in the area where the capture takes place by the chucks of the chuck.

The inventor conceives several embodiments suitable to the usual types of chucks or heads.

The most normal is that the chucks and heads of the lathes, milling machines or similar machines, are equipped with three claws although there are also four claw heads.

Therefore, the universal and simplest solution is to provide the drill rod with a single tab. That way the tab can always coincide between two consecutive claws and will be enough to perform the functions of anti-rotation stop.

However, the inventor also proposes the solution of three angularly spaced flanges with a value of 120 degrees, which is the same spacing as the usual chuck claws. In that case, each flange can be placed in the corresponding hole formed by each two claws whose hole is larger the larger the size of the captured bit.

It is true that when working with small diameter drill bits, the gaps between claws almost disappear so the proposed solution will not be valid for small diameters but the inventor knows that, in practice, the problem of slipping arises, in particular, when working with the largest diameters, that is, between 6-7 millimeters and about 12-15 millimeters or greater. In these cases the separation between claws is always greater than 1.5 millimeters, which admits the proposed thickness for the eyelashes, which is of the order of one millimeter or one and a half millimeters.

In the sections of schematic drawings and of preferred embodiments by the inventor, the different solutions proposed to solve the different cases that are usually presented in practice are indicated and described.

All of them involve interesting developments in the market for drilling tools without this leading to a significant increase in their manufacturing cost.

Brief description of the drawings

Six figures with the following meaning are included:

Figure 1

Represents the side view of a metal drill with three protrusions

1.- Drill Bit

1.1.- Cutting area

1.2.- Capture zone

2.- Highlight

Figure 2

Displays the view of the drill from the end of the capture zone

3.- Main diameter D1

4.- Capture zone diameter D2

Figure 3

It represents the bit of the invention coupled in a chuck

5.- Chuck

5.1- Claw

Figure 4

Show the view of the previous set by section (m-m)

Figures 5 and 6

They represent the side views (Fig. 5) and from the end of the capture zone (Fig. 6) of another embodiment in which there is only one shoulder

Detailed explanation of an embodiment of the invention

Drill with projections in the capture zone (1) (Figs. 1 to 6) which consists of a special conformation of the capture zone of all types of drill bits to prevent the slipping of the drill chuck during the drilling process.

In a preferred embodiment by its inventor it consists of a drill bit (1), of the usual ones for all types of works and materials, of which they are attached to a chuck (5) or head in order to make perforations. The drill (1) of the invention characterized, according to the existing regulations, by its main diameter D1 (3), in the cutting area (1.1), has in the capture area (1.2), one or more projections (2) which extend along said capture zone (1.2) (See Fig. 1). The mentioned projections (2), assimilable to straight prisms with a square base of 1-1.5 mm on the side, are formed by reduction of the main diameter D1 (3), to a lower value corresponding to the diameter in the capture area D2 (4 ) throughout the perimeter area of the drill (1) except in the places of the projections themselves (Figs. 1 and 2). These figures represent the case of a drill (1) which has been provided with three projections (2), uniformly distributed, so they are located perimeter every 120 degrees.

With this configuration it is possible to attach the drill bit (1) to a chuck (5), as shown in (Figs. 3 and 4), where a very common chuck is used, equipped with three claws (5.1), which also They are distributed at 120 degrees. It can be seen that the drill bit (1) is pressed by the claws (5.1) in the capture zone (1.2), with the capture zone diameter D2 (4), the projections (2) being located between the claws (5.1) .

For this, it is necessary that the gaps that remain between the claws (5.1) have a value greater than the thickness of the shoulder (2), which, as indicated above, does not exceed 1.5 millimeters. All chucks (5) support this capture for drill diameters (1) greater than about 5-6 millimeters.

The inventor contemplates other types of embodiments to make it possible to capture the bits (1) with any type of chuck (5) or heads. Thus the most universal embodiment is that in which the drill has a single projection (2). You also think of two or four projections (2) for chucks or heads with four claws.

Although it has been indicated that the formation of the projections (2) is achieved by reducing the main diameter D1 (3) of the drill bit of origin in the capture zone (1.2), except in the area of the projections themselves, it is not ruled out the addition of prismatic projections, by welding, once the main diameter D1 (3) has been reduced to the value of the capture zone diameter D2 (4), with the condition that the circumference circumscribed to said projections (2), in any section , has a diameter equal to or slightly smaller than said main diameter D1 (3).

It is easily understood that the use of the bits (1) of the invention completely prevents their slipping inside the chuck (5) with the consequent advantage over the usual bits which, in certain circumstances of lack of tightening or perforations of materials very hard, they remain stuck in the material or the chuck (5) slides over the drill bit (1).

It is not considered necessary to make the content of this description more extensive so that a person skilled in the art can understand the scope and advantages derived from the invention, as well as develop and implement the object thereof. However, it should be understood that the invention has been described according to a preferred embodiment thereof, whereby it may be susceptible to modifications without affecting or implying any alteration of the basis of said invention. That is to say, the terms in which this preferred description of the invention has been exposed should always be taken in a broad and non-limiting manner.

Claims (3)

1 Drill bit with projections in the capture zone that consists of a special conformation of its capture zone to prevent, during the drilling process, its slippage is registered with respect to the drill chuck, characterized by being drills (1) with an area of cut (1.1) with main diameter D1 (3) and a capture zone (1.2) with capture zone diameter D2 (4) that have one or more projections (2) in the capture zone (1.2). 2. - Drill bit with projections in the capture area, according to the preceding claim, characterized in that, when there are several projections (2), they are evenly distributed. 3. - Drill with projections in the capture area, according to the preceding claims, characterized in that the diameter of the circumference circumscribed to the projections (2), in any section, never exceeds the value of the main diameter D1 (3) of the drill (one).