KR920005483Y1 - The cooling apparatus of electric motor tool - Google Patents
The cooling apparatus of electric motor tool Download PDFInfo
- Publication number
- KR920005483Y1 KR920005483Y1 KR2019900010940U KR900010940U KR920005483Y1 KR 920005483 Y1 KR920005483 Y1 KR 920005483Y1 KR 2019900010940 U KR2019900010940 U KR 2019900010940U KR 900010940 U KR900010940 U KR 900010940U KR 920005483 Y1 KR920005483 Y1 KR 920005483Y1
- Authority
- KR
- South Korea
- Prior art keywords
- metal
- housing
- rotating shaft
- hole
- cooling apparatus
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/008—Cooling means
Abstract
내용 없음.No content.
Description
제1도는 본 고안 장치를 나타낸 전동공구의 일부단면도.1 is a partial cross-sectional view of a power tool showing the device of the present invention.
제2도는 종래 장치를 나타낸 전동공구의 일부단면도.2 is a partial cross-sectional view of a power tool showing a conventional apparatus.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 하우징 2 : 메탈1 housing 2 metal
3 : 회전축 5 : 홈3: rotating shaft 5: groove
6 : 외부관통구멍 7 : 구멍6: outer through hole 7: hole
8 : 회전날개8: rotating blade
본 고안은 전기드릴이나 전기그라인더와 같은 전동공구에 관한 것으로, 좀더 구체적으로는 회전축의 고속회전에 의해 회전축과 메탈(Metal)사이에서 발생하는 열을 효과적으로 냉각시킬 수 있도록 한 것이다.The present invention relates to an electric tool such as an electric drill or an electric grinder, and more specifically, to effectively cool the heat generated between the rotating shaft and the metal by the high speed rotation of the rotating shaft.
일반적으로 전동공구의 회전축은 메탈에 의해 지지된 상태로 회전하게 되며, 이에 따라 메탈부분에는 회전축과 메탈간의 마찰로 인해 많은 열이 발생하게 된다.In general, the rotating shaft of the power tool is rotated in a state supported by the metal, and thus a lot of heat is generated in the metal part due to the friction between the rotating shaft and the metal.
종래에는 전동공구내에서 발생하는 열을 냉각시키기위해 제2도에 도시한 바와 같이 하우징(1)에 다수의 공기유입공(4)을 형성하여 전동공구의 작동시 하우징(1) 내부로 유입되는 공기에 의해 전동공구가 공냉되도록 하였으나, 상기한 종래의 구조는 자연대류 현상에 의해 외부공기가 하우징(1) 내로 유입되는 구조이기 때문에 공기의 순환 작동이 효과적으로 이루어지지 않는다.Conventionally, as shown in FIG. 2, a plurality of air inlet holes 4 are formed in the housing 1 to cool the heat generated in the power tool, which is introduced into the housing 1 during operation of the power tool. Although the power tool is air-cooled by air, the above-described conventional structure is a structure in which external air is introduced into the housing 1 by natural convection, and thus the circulation operation of air is not effectively performed.
따라서 회전축(3)의 고속회전시 회전축의 후단부를 지지하는 메탈(2)과 회전축(3)사이에 심한 마찰열이 발생하게 되고 이러한 마찰열에 의해 메탈(2)의 온도가 높아져 메탈의 수명단축과 기기의 성능 저하가 초래된다.Therefore, during the high-speed rotation of the rotating shaft 3, a severe frictional heat is generated between the metal 2 supporting the rear end of the rotating shaft and the rotating shaft 3, and the frictional heat increases the temperature of the metal 2, thereby reducing the life of the metal and the device. The performance degradation is caused.
또한 하우징이 통상 합성수지로 제조되므로 메탈 설치부분이 고온에 의해 용융되어 메탈이 유동할 우려가 많고 메탈이 유동하는 경우 회전축의 떨림현상이 발생하게 된다.In addition, since the housing is usually made of synthetic resin, the metal installation part is melted by the high temperature, so that the metal may flow. When the metal flows, vibration of the rotating shaft may occur.
본 고안은 종래의 이와 같은 문제점을 해결하기 위한 것으로, 이를 첨부된 도면 제1도에 의해 더욱 상세히 설명하면 다음과 같다.The present invention is to solve such a problem in the prior art, it will be described in more detail by the accompanying drawings, Figure 1 as follows.
하우징(1)내에 메탈(2)을 설치하여 이 메탈에 회전축(3)의 후단부를 결합하고 메탈의 주위에는 공기유입공(4)을 형성한 것에 있어서. 회전축(3)의 후단부에 길이방향의 홈(5)과 외부관통구멍(6)을 형성하여 외부공기가 하우징에 형성된 구멍(7)을 통해 내부로 유입될 수 있게 하고 회전축(3)의 전방에는 회전날개(8)를 고정하여서 된 것이다.In the case where a metal (2) is provided in the housing (1), the rear end of the rotating shaft (3) is coupled to the metal, and an air inlet (4) is formed around the metal. In the rear end of the rotating shaft 3, a longitudinal groove 5 and an outer through hole 6 are formed so that external air can be introduced into the inside through the hole 7 formed in the housing, and the front of the rotating shaft 3 It is made by fixing the rotary blade (8).
이와 같이 구성된 본 고안은 기기의 작동시 회전축(3)이 회전을 하게되면 회전날개(8)가 회전축과 함께 회전을 하게 되고 회전날개(8)의 회전에 의해 하우징(1)의 내부와 외부사이에 압력차가 생겨 외부공기가 하우징내부로 강제 흡입된다.When the rotary shaft 3 rotates during the operation of the device, the present invention configured as described above rotates the rotary blade 8 together with the rotary shaft and between the inside and the outside of the housing 1 by the rotation of the rotary blade 8. There is a pressure difference in the air, and the external air is forced into the housing.
즉, 회전날개(8)가 회전하면 공기유입공(4)을 통해 외부공기가 하우징내로 강제흡입됨과 동시에 하우징 후단부에 형성된 구멍(7)과 회전축(3)에 형성된 길이방향의 홈(5)및 외부관통구멍(6)을 통해 하우징내로 강제흡입되며, 특히 하우징의 구멍(7)→길이방향 홈(5)→외부관통구멍(6)을 통해 흡입되는 공기는 회전축(3)과 메탈(2)의 접속부분 중심부를 통과하게 된다.That is, when the rotary blade 8 rotates, the external air is forced into the housing through the air inlet hole 4 and the groove 7 in the longitudinal direction formed in the hole 7 and the rotating shaft 3 formed at the rear end of the housing. And forced suction into the housing through the outer through hole (6). In particular, the air sucked through the hole (7) → the longitudinal groove (5) → the outer through hole (6) of the housing is rotated through the shaft (3) and the metal (2). Pass through the center of the connection.
따라서 회전축의 고속회전시 회전축과 메탈간의 마찰로 인해 발생하는 열을 효과적으로 냉각시킬 수 있게되고 메탈이 고온화 됨에 따라 야기되는 하우징의 용융과 메탈의 유동을 방지하여 기기의 성능을 향상시킬수 있게 된다.Therefore, it is possible to effectively cool the heat generated by the friction between the rotating shaft and the metal during the high-speed rotation of the rotating shaft and to prevent the melting of the housing and the flow of the metal caused by the high temperature of the metal to improve the performance of the device.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900010940U KR920005483Y1 (en) | 1990-07-25 | 1990-07-25 | The cooling apparatus of electric motor tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019900010940U KR920005483Y1 (en) | 1990-07-25 | 1990-07-25 | The cooling apparatus of electric motor tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR920002257U KR920002257U (en) | 1992-02-24 |
| KR920005483Y1 true KR920005483Y1 (en) | 1992-08-13 |
Family
ID=19301416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019900010940U KR920005483Y1 (en) | 1990-07-25 | 1990-07-25 | The cooling apparatus of electric motor tool |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR920005483Y1 (en) |
-
1990
- 1990-07-25 KR KR2019900010940U patent/KR920005483Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR920002257U (en) | 1992-02-24 |
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