JP2000006055A - Power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and accurately change the direction of exhaust wind to an arbitrary direction according to working environments by a worker by providing a wind passage changing member capable of changing an exhausting direction of air sucked within a housing by revolution of a cooling fan. SOLUTION: Outside air is flowed into a housing 4 from a plurality of suction ports formed on the housing 4 and air warmed by cooling of a motor is exhausted from an exhaust port 9. A wind passage changing member 10 is constituted of a C type sectional shape having a wind wall 10a for compulsorily flowing air exhausted in a direction orthogonally crossed with the longitudinal direction of an electric tool main body in the longitudinal direction and has a space part 10c formed among a closely adhering part 10b for mounting the wind passage changing member 10 on the housing 4, the wind wall 10a changing air flow and the exhaust port 9. Only if the wind passage changing member 10 is mounted in the vicinity of the exhaust port 9, exhaust wind can be easily and surely prevented from blowing on the face of a worker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power tool having a cooling fan.

[0002]

2. Description of the Related Art A conventional power tool will be described with reference to FIGS. 9 is a partially omitted side view showing a conventional power tool having a wind window, FIG. 10 is a cross-sectional view taken along line CC of FIG. 9, FIG. 11 is a view taken in the direction of arrow c in FIG. 9, and FIG. FIG. 9 is a view as viewed from the direction d of FIG. 9.

Referring to FIGS. 9 and 10, an armature 1 and a stator 2 constituting a motor as a driving source are housed in a housing 4 together with a carbon brush 3 and the like. A gear mechanism for transmitting a tool and a striking transmission mechanism for transmitting a striking force to the tip tool are housed in the hammer case 5. Here, the housing 4 and the hammer case 5 are integrally provided by screws 6 as shown in FIG.

[0004] A cooling fan 7 is arranged in the armature 1 so as to be integrally rotatable.
By the rotation of, outside air (air) flows into the housing 4 from a plurality of air inlets 8 formed in the housing 4 as shown in FIG. Discharging.

[0005]

As described above, the electric power tool takes air into the housing through a suction port formed in the housing and cools the air through a discharge port formed in the housing for cooling the motor. . That is, since the air is discharged from the discharge port formed at a predetermined position of the housing, depending on the working condition, the discharged air may blow on the worker's face or cause dust to be scattered. Had occurred.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a power tool excellent in workability in which a worker can easily and accurately change the direction of a discharge wind to an arbitrary direction according to a work environment. It is to be.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a power tool having a housing for accommodating a motor having a cooling fan, and an air inlet and an outlet formed in the housing. This can be achieved by providing a wind path changing member capable of changing the discharge direction of the sucked air into the housing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An air path changing member 1 in this embodiment.
0 will be described with reference to FIGS. FIG. 1 is a partially omitted side view showing a state in which an air path changing member according to the present invention is mounted on a power tool, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
FIG. 4 is a view from the direction of arrow b in FIG. 1, FIG. 5 is a front view showing an air path changing member according to the present invention, and FIG. 6 is an air path changing member according to the present invention. FIG. 7 is a cross-sectional view taken along the line BB of FIG. 5, and FIG. 8 is a cross-sectional view showing another state in which the airflow path changing member according to the present invention is mounted on a power tool.

FIG. 1 is a partially omitted side view of a power tool, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 3 is a view taken in the direction of arrow A in FIG. 10 is a front view, FIG. 5 is a rear view showing the airflow path changing member 10, and FIG. 6 is a sectional view taken along line BB of FIG.

In FIG. 1 and FIG. 2, an armature 1 and a stator 2 constituting a motor as a driving source are housed in a housing 4 together with a carbon brush 3 and the like.
Further, a gear mechanism for transmitting the rotational power of the motor to a tip tool (not shown) and a striking transmission mechanism for transmitting a striking force to the tip tool are housed in the hammer case 5. Here, the housing 4 and the hammer case 5
Are integrally provided by screws 6 as shown in FIG.

The armature 1 is provided with a cooling fan 7 so as to be integrally rotatable.
3, outside air (air) flows into the housing 4 from a plurality of air inlets 8 formed in the housing 4 as illustrated in FIG. .

The air discharged from the outlet is shown in FIGS.
The air can be flowed in the longitudinal direction of the power tool main body by detachably providing the air path changing member 10 formed of the elastic body shown in FIG.
The air path changing member 10 forcibly flows air discharged in a direction perpendicular to the longitudinal direction of the power tool main body in the longitudinal direction, that is, a wind wall 10a for flowing in the direction of arrow 11 shown in FIG. Air path changing member 1
The housing 4 has a close contact portion 10b for mounting it to the housing 4, and a space 10c formed between the wind wall 10a for changing the air flow and the outlet 9 formed in the housing 4 as described above.

From the above, it is possible to easily and reliably prevent the discharge wind from being blown to the face of the worker simply by mounting the air path changing member 10 near the discharge port 9. be able to.

Also, as shown in FIG. 8, the same effect as described above can be obtained even when the air flow path changing member 10 is mounted so as to be opposite to the direction shown in FIG.

Since the space 10c is formed in a circumferential shape, the air discharged from the discharge ports 9 formed on both sides of the housing can easily flow in the longitudinal direction, and the wind can be reduced. By making the contact inner diameter portion of the path changing member 10 smaller than the outer diameter of the housing 4 or forming the air path changing member 10 from a material having a large frictional resistance,
It is possible to prevent the air path changing member 10 from slipping off the housing 4 during work.

[0016]

According to the present invention, by providing the housing with an air passage changing member capable of changing the discharge direction of the air sucked into the housing by the rotation of the cooling fan, the operator can easily work according to the working environment. In addition, it is possible to provide a power tool excellent in workability that can appropriately change the direction of the discharged air to an arbitrary direction.

[Brief description of the drawings]

FIG. 1 is a partially omitted side view showing a state in which a wind path changing member according to the present invention is mounted on a power tool.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view seen from an arrow direction a in FIG.

FIG. 4 is a view seen from an arrow b in FIG. 1;

FIG. 5 is a front view showing an air path changing member according to the present invention.

FIG. 6 is a rear view showing an airflow path changing member according to the present invention.

FIG. 7 is a sectional view taken along the line BB of FIG. 5;

FIG. 8 is a cross-sectional view showing another state in which the air path changing member according to the present invention is mounted on a power tool.

FIG. 9 is a partially omitted side view showing a conventional power tool having a wind window.

FIG. 10 is a sectional view taken along line CC of FIG. 9;

FIG. 11 is an arrow view as viewed from a direction c in FIG. 9;

FIG. 12 is a view as viewed in the direction of arrow d in FIG. 9;

[Explanation of symbols]

Reference numeral 4 denotes a housing, 7 denotes a cooling fan, 8 denotes a suction port, 9 denotes a discharge port, 10 denotes an air path changing member, 10a denotes a wind wall, 10b denotes a close contact portion, and 10c denotes a space portion.

Claims (3)

[Claims] 1. A power tool having a housing for accommodating a motor having a cooling fan, and an air suction port and an air discharge port formed in the housing. An electric power tool comprising an air path changing member capable of changing a discharge direction of the sucked air. 2. The air path changing member according to claim 1, further comprising: a wind wall for forcibly flowing air discharged in a direction perpendicular to a longitudinal direction of the power tool in the longitudinal direction, and a wind wall for attaching the air tool to the housing. The power tool according to claim 1, further comprising a contact portion, and a space portion between the wind wall and the discharge port. 3. The power tool according to claim 1, wherein the air path changing member is made of an elastic body.