JPH05309510A - Electric drill - Google Patents

Abstract

PURPOSE:To oil the end of a drill for protecting the drill and make it possible to press the drill strongly against a drilled member for raising the drilling efficiency, by setting a small-size tank connected to a nozzle neighbouring on the drill, in an auxiliary handle set on the front part of an electric drill main body. CONSTITUTION:When a work member such as an iron member is drilled by a drill 5, a large friction is generated between the end part of the drill 5, bearing a cutting action of the drill 5, and the drilled member, and heat is generated. At this time, a small-size tank 7 is pressed from an opening 11 of an auxiliary handle 6 for pouring oil 8 filled in the tank 7 to the end part of the drill 5 through a nozzle 9. When the oil 8 in the small-size tank 7 is poured to the end part of the drill 5 through the nozzle 9, the large friction generated between the end of the drill 5 and the drilled member is reduced by the oil 8, the heat is dissipated through the oil 8, and consequently, the end of the drill 5 is protected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric drill which can be easily lubricated during processing.

[0002]

2. Description of the Related Art An electric drill is constructed so as to punch various members such as wood, iron material and concrete. Among these, the drill for drilling wood has a screw formed at the tip of the drill and is configured to bite into the wood as the drill rotates, so that drill can be easily drilled. Moreover, in the case of concrete, it is configured to rotate and punch holes while striking the drill in the axial direction.Because the concrete is crushed and punched at the tip of the drill by hitting, drilling is possible without pressing the drill strongly. it can. However, unlike these drills, drills drilled in an iron material generally cannot be drilled unless they are strongly pressed against a member drilling drills to some extent. Therefore, the tip of the perforation causes a large friction with the member to be perforated, and this friction causes various problems. That is, the tip portion of the hardened and hardened heat is generated by friction and is heated to be in a tempered state, resulting in poor sharpness of the hardened material. Then, since the dust generated by perforation accumulates between the perforation and the perforation member, an irregular external force is applied to the tip portion of the perforation, and the tip portion of the perforation may be lost.

In order to solve such a problem, when the iron material is drilled with a drill, oil is poured between the drill and the drilling member to reduce friction between the drill and the member and to promote heat dissipation. There is.

According to such a method, it is possible to easily protect the perforations and increase the perforation speed. However, it is necessary to interrupt the drilling work for lubrication, and not only is it troublesome, but when the drilling work is interrupted, the work posture changes. It often happened that it was broken.

The present invention has been made in view of the above circumstances, and provides an electric drill that can continuously perform drilling without interrupting the drilling work during drilling work and that allows easy lubrication. The purpose is to

[0006]

According to the present invention, a main handle is provided at a rear portion of a main body for accommodating an electric motor, a chuck driven by the electric motor is provided at a front portion, and a chuck is provided on the chuck. A small tank communicating with the nozzle is installed in an auxiliary handle provided in the front part of the main body, and the small tank can be pressed from a part of the auxiliary handle. Solves the problem by holding

[0007].

[Operation] A small tank that holds oil for lubrication is installed inside the auxiliary handle, and the small tank can be pressed from a part of this auxiliary handle. It is possible to press a small tank to carry out oiling while holding both of the auxiliary handles, and it is possible to perform continuous drilling without changing the working posture, and also to do stable oiling to the drill. ..

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 is a partially cutaway side view of an electric drill according to an embodiment of the present invention, and FIG. FIG. 3 is a vertical cross-sectional view of an essential part showing another embodiment of the small tank, which is the same as the first embodiment.

In FIG. 1, the electric drill is provided with a main handle 2 at a rear portion of a main body 1 containing an electric motor,
A start switch 3 for the electric motor is provided together with the main handle 2. A chuck 4 that rotates the electric motor at a low speed and rotates at a high torque at a low speed is provided at the front portion of the main body 1. A drill 5 as a tool is attached to the chuck 4 and abuts a punching member such as iron. Has been done.

Further, an auxiliary handle 6 extending at a right angle to the drill 5 is attached to the front portion of the main body 1, a small tank 7 is provided inside the auxiliary handle 6, and oil 8 is provided. It is filled. The small tank 7 communicates with a thin nozzle 9 provided toward the drill 4,
A cock 10 is provided on the way and is configured to close the nozzle 9. And the auxiliary handle 6 has
An opening 11 is formed in a part, and the small tank 7 can be pushed from the opening 11.

In FIG. 2, the auxiliary handle has an opening 11
Protrusion 1 that can press the small tank 6 via the
A lever 13 with 2 is provided.

In FIG. 3, the small-sized tank 14 is made of a strong metal and is screwed to the auxiliary handle 15 and communicated with the nozzle 9. And
An opening 16 is formed at the rear end of the small tank 14, and a pump 17 is provided to inject air into the opening 16. The pump 17 is provided with a valve 18, and by pushing the pump 17, external air can be injected into the small tank 14.

In such a structure, the electric drill is
When the main handle 2 is gripped and the switch 3 is pulled, the electric motor rotates and the chuck 4 rotates. Then, the drill 5 attached to the chuck 4 rotates and can punch a punching member such as iron. When the perforation member such as iron is perforated by the drill 5, large friction is generated between the tip portion of the drill 5 which causes the cutting action of the drill 5 and the drill member, and heat is generated. However, at this time, in the embodiment shown in FIG. 1, the small tank 7 is pushed from the opening 11 of the auxiliary handle 6 to remove the oil 8 filled in from the nozzle 9 through the hole 5.
Pour into the tip of. At this time, the cock 10 is opened so that the oil 8 is easily ejected from the small tank 7 through the nozzle 9.

When the oil 84 in the small tank 7 is poured from the nozzle 9 to the tip portion of the drill 5, the large friction generated between the tip of the drill 5 and the boring member by the oil 8 is alleviated, and The heat is dissipated through the oil 8 and the drill 5
The tip of the will be protected. For such an operation of lubrication, an operator can hold the main handle 2 with one hand and press the small tank 7 through the opening 11 of the auxiliary handle 6 with a finger while holding the auxiliary handle with the other hand. Therefore, there is no need to change the posture of the work, and if used, it is possible to lubricate during the drilling without stopping the drilling work, which is convenient.

Further, in the embodiment shown in FIG. 2, the small tank 7 is configured to be pressed by the lever 13, which is convenient when frequent lubrication is required. The small tank 7 can be formed as a small tank 14 as shown in FIG. 3, and in this case, since it is screwed into the auxiliary handle 15 and is detachable, the small tank 7 can be easily filled with oil. It can be replaced with the tank 14, and workability can be improved. A pump 17 is provided at the rear end of the small tank 14, and when the pump 17 is pushed, external air is injected into the small tank 14 through the valve 18, and the air pressure thereof causes the nozzle 9 Can be lubricated from.

The nozzle 9 for such lubrication is provided with a cock 10 and can be surely stopped by opening and closing as necessary, so that the oil from the nozzle 9 can be stopped when lubrication is unnecessary. Leakage can be eliminated.
However, even if the cock 10 is eliminated and the tip portion of the nozzle 9 is thinned, oil leakage can be stopped to such an extent that there is no practical problem.

When the electric drill is small, it is sufficient that the tip portion of the nozzle 9 is thin. Also, oil 8
Usually machine oil may be used, which may have a low viscosity of about 80. If the nozzle 9 is made thin and has a cock 10, a cap is provided at the tip of the nozzle 9 so that it can be removed when oiling is required. You can also do it.

In a general operation, the auxiliary handle 6 is rarely located below so as to be suspended from the main body 1 as shown in FIGS. 1 and 2, but in such a case, the small tank 6 is used. In some cases, the oil 8 collects in the lower part and the upper part becomes a space, and even if the small tank 6 is pressed, the oil 8 may not reach the nozzle 9, but in such a case, the auxiliary handle 6 should be at least horizontal. The problem can be solved by adopting such a posture.

[0019]

As described above, since the electric drill is lubricated at the tip of the drill, the drill is protected and the drill can be strongly pressed against the drilling member, and the drilling efficiency can be improved. Since a small tank is provided in the auxiliary handle for oiling and holding and pushing the oil, there is no hindrance to the drilling work, there is no trouble such as breaking, and it can be used with confidence. It becomes an electric drill that can be done, and its effect is extremely large.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an electric drill according to an embodiment of the present invention.

FIG. 2 is another embodiment similar to that shown in FIG.

FIG. 3 is a vertical cross-sectional view of a main part showing an embodiment of a small tank.

[Explanation of symbols]

 1 ... Main body 2 ... Main handle 4 ... Chuck 5 ... Drill 6,15 ... Auxiliary handle 7, 14 ... Small tank 9 ... Nozzle 11 ... Opening

Claims (1)

[Claims] 1. A main handle is provided at a rear portion of a main body for accommodating an electric motor, a chuck driven by the electric motor is provided at a front portion, a chuck is provided at the chuck, and a nozzle adjacent to the chuck is provided at the nozzle. A small tank communicating with the main body is installed in an auxiliary handle provided at a front portion of the main body, the small tank can be pressed from a part of the auxiliary handle, and oil is retained in the small tank. Electric drill.