JPH05309544A - Power tool - Google Patents

Abstract

PURPOSE:To easily blow off dust such as powder generated from the machining section of a tool and the like during machining by forming an open section at one side of a cylindrical cover covering a chuck at the tip end side of the chuck, and thereby providing a blower sending air to the open section. CONSTITUTION:A chuck 2 is rotated with a motor driven, and when a tool such as a drill 8 and the like are rotated, dust such as chips and the like is accordingly piled up at a machined area. In this case, air is sent from the tip end of the cover 4 covering the chuck 2 by a blower 3. The chips are thereby removed by the air blown off without being piled up. This constitution thereby enables the contact point of the tool such as the drill 8 and the like with a work to be clearly seen, so that the work can be machined while being closely watched.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric tool which is configured to blow air to a working portion of a tool attached to the tip of a chuck and which can remove chips and the like.

[0002]

2. Description of the Related Art A power tool such as an electric drill is one in which a tool such as a drill is attached to a chuck driven by an electric motor to perform drilling or the like. For this reason, dust such as chips is accumulated in the processed portion and covers the processed portion of the tool such as a drill, and the worker cannot see the processed portion due to the obstacle of the dust.

Therefore, it is often necessary to remove dust accumulated on the processed portion during the working operation, and in such a case, the work must be interrupted. Then, in the machining work in which chips and the like are generated, it is impossible to continuously perform the work from the beginning to the end of the machining, and the work must be interrupted in order to remove the chips and the like.

In addition, when oil is applied for protection of perforations, the oil applied to the dust is absorbed, which causes problems such as an increase in the amount of oil applied.

Further, in the case of drilling with an electric drill or the like, once the work is interrupted, the posture of supporting the electric drill is changed, and an obstacle such as breaking the hole occurs. In order to carry out machining without causing such obstacles, it is necessary to make the machined part visible at all times.
It was impossible to work alone, and it was generally difficult to solve it because it is common to work alone. Particularly in the case of an electric drill, if a mark indicating the depth of the hole is attached to the drill, the mark becomes invisible due to the accumulated dust, and it is difficult to adjust the hole depth by such a method. It was

Further, regarding the adjustment of the drilling depth, even if a stopper which projects from the electric drill body in the drilling direction and collides with the workpiece is provided, dust such as chips is present between the workpiece and the stopper. This caused an error. As a method of removing dust such as chips, when drilling with a cylindrical drilling tool, that is, a hole saw, chips are accumulated inside the tube due to the fact that the hole saw is formed into a tube, and the hole drilling of the hole saw is performed. In order to prevent this, compressed air may be sent to the inside of the hose, but in this case, the chips inside the hose can be discharged, but the chips accumulated on the outside of the hose will still accumulate, It was deposited on the processed part and covered the processed part.

In the case of a vibrating drill for drilling in concrete or the like, a large amount of powdery debris is deposited due to the drilling, and the dust may be deposited so that it cannot be seen at all. Furthermore, the same applies to the case of a rotary polishing tool that performs processing other than drilling such as drilling,
The debris generated during polishing accumulates on the processed part,
It sometimes hindered processing.

The present invention has been made in view of the above circumstances, and it is possible to remove dust such as chips covering the machined portion during machining so that the machining operation can be performed while watching the machined portion. An object is to provide a power tool configured.

[0009]

According to the present invention, a chuck is provided on one side of a main body in which an electric motor is installed, a cylindrical cover for covering the chuck is provided, and an opening is provided on one side of the cover which is the tip side of the chuck. The problem is solved by providing a blower which is formed and blows air to this opening.

[0010]

When the electric motor is driven to rotate the chuck and the tool such as a drill is rotated, dust such as chips is accumulated on the processed portion, but since air is blown from the tip of the cover that covers the chuck, This air blow removes the chips without accumulating.

For this reason, the contact point between the processing tool such as a drill and the workpiece can be clearly seen, and the work can be performed while observing the processing state.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 is a side view showing a longitudinal section of an essential part according to an embodiment of the present invention, and FIG. Is. FIG. 3 is a side view in which a main part of another embodiment is shown in vertical cross section, FIG. 4 is a perspective view of the cover shown in FIG. 3, and FIG. 5 is another embodiment of the cover.

In FIG. 1, a power tool has a switch 1a provided in a main body 1 in which an electric motor is installed, and is configured to start and stop the installed electric motor. The chuck 2 is provided with a chuck 2 that is rotated at a reduced speed by a speed reducer installed inside. The chuck 2 is provided with an axial flow fan 3 on its outer circumference, and a cover 4 is provided so as to cover the axial flow fan 3, and the cover 4 is attached to a portion where the auxiliary handle 5 is attached. It is detachably attached by a bolt 6. Further, the cover 4 has a handle 5
A through hole 7 is provided in the mounting portion of the above, and an intake hole of the axial fan 3 is formed.

The chuck 2 has a drill 8 as a processing tool.
Is provided so that the wall 9 or the like can be perforated by the drill 8. The auxiliary handle 5 and the handle 10 formed on the switch 1a of the main body 1 can be grasped and operated.

In FIG. 2, the axial fan 3 provided in the chuck 2 is constructed so that the cover 4 efficiently sucks air from the through hole 7 and exhausts it. It is configured to be removable by. The structure in which the cover 4 is detachable is a configuration necessary for attaching and detaching the drill 8 to and from the chuck 2. In FIG. 3, another embodiment of the power tool is shown,
The cooling air of the electric motor provided inside the frame 1 is used to exhaust the air from the tip of the cover 11. That is, the cooling air of the electric motor is sucked in through the intake holes 12 formed on the handle 10 side of the frame 1,
The air is exhausted from the exhaust port 13 formed on the attachment side of the chuck 2, which is the other side. Then, as shown by the arrow in the figure, the air is guided to the cover 11 and discharged to the tip portion of the chuck 2.

As for the cover 11, the butterfly bolt 14
It is configured so that it can be easily attached and detached by, and when replacing the drill 8 attached to the chuck 11,
It is designed to be removable.

As shown in FIG. 4, the cover 11 is formed in a tubular shape and is configured to effectively guide the exhaust air to the tip portion of the drill 8.

In FIG. 4, another embodiment is shown in which the tip portion 15 of the cover 14 is configured to move when pushed in the axial direction, and a resistance plate 16 is formed between the chuck 2 and the chuck 2. The tip portion 15 of the cover 14 is configured to be pushed out in the direction of the drill 8 by the wind pressure, and the tip portion 17 of the cover 14 is further projected to collide with the machined surface to be drilled by the drill 8. Cover 14
Is configured to determine the position of the.

In the electric tool having such a structure, the chuck 2 is rotated through the speed reducer by operating the switch 1a to start the electric motor. In the embodiment shown in FIG. The axial fan 3 that has been set is the through hole 7.
The air is taken in from and exhausted in the direction of the drill 8 by the cover 4. Therefore, when the wall 9 or the like is perforated by the drill 8, the powder of the wall accumulated by the perforation is blown away by the exhaust air from the fan 3, and the perforated portion of the drill 8 is always visible without being deposited around the drill 8. become. For this reason, in the case of an operation in which the perforated portion of the drill 8 needs to be carefully observed, it is possible to remove the powder generated by the perforation, that is, the debris accumulated by the processing and accumulated.

Therefore, there is no waste accumulated by the processing, the processing is always easy, and the processing can be performed while visually checking the processing state, so that the reliable processing operation can be performed.

Further, since the axial fan 3 is covered by the cover 4, the function of exhausting air can be obtained efficiently, and even if the rotation of the chuck 2 is relatively low, the amount of exhausted air that blows off dust can be obtained. In another embodiment shown in FIG. 3, the cover 1 is provided by using the exhaust air of a fan for cooling the electric motor provided in the electric motor.
The exhaust air is exhausted to the tip portion of the drill 8 by 1. In this case, the exhaust speed is high and the exhaust air is strong, and the chuck 2 does not need to have an axial fan, and the structure is simple. Become.

In this way, by sending air to the tip portion of the drill 8, that is, the portion to be processed, by the covers 4 and 11, since the dust generated by the processing is blown away and disappears, the processed portion is often seen during the work. Therefore, there is no need to interrupt the work and remove the waste, and in the work such as electric drill, there is no need to remove the drill from the hole that was drilled in the middle of drilling, and re-insert the drill in the hole. Since it does not occur, there is no obstacle such as breaking the hole due to different angles between the hole and the hole, and reliable work can be performed.

It is convenient for the cover 11 to be configured such that the tip portion thereof is retracted as shown in FIG. 5, and the tip end portion 17 of the cover 14 collides with the working surface to cover the cover 11. It is more convenient if the tip portion 15 of 14 is configured to be retracted, so that the cover 1 can be processed according to the progress of processing.
It is convenient because the position of the tip portion 15 of 4 is automatically corrected.

[0024]

According to the present invention, dust such as powder generated from a machined portion of a tool during a machining operation can be easily blown off by the exhaust air from the cover, and the machined portion of the tool can be visually observed during machining. When the machining work is performed according to the mark such as the mark, the machining can be performed very conveniently, and the effect that the accurate machining can be performed without interrupting the work is extremely great.

[Brief description of drawings]

FIG. 1 is a side view of a longitudinal section of a main part according to an embodiment of the present invention.

FIG. 2 is a front view of the embodiment shown in FIG.

FIG. 3 is a side view showing a longitudinal section of a main part of another embodiment.

FIG. 4 is a perspective view of the cover shown in FIG.

FIG. 5 is another embodiment of the cover.

[Explanation of symbols]

 1 ... Main body 2 ... Chuck 3 ... Axial fan 6 ... Butterfly bolt 7 ... Through hole 8 ... Drill 10 ... Handle

Claims (1)

[Claims] 1. A chuck is provided on one side of a main body that houses an electric motor, and a cylindrical cover that covers the chuck is provided. An opening is formed on one side of the cover, which is the tip side of the chuck, and air is blown to the opening. An electric tool equipped with a blower.