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electrical tools

A technology of electric tools and shells, which is applied in the field of electric tools, can solve the problems of increasing the number of electric tool parts and increasing the number of parts, and achieve the effects of preventing the number of parts from increasing, reducing resistance, and smooth flow

Active Publication Date: 2016-10-26
MAKITA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in order to prevent foreign matter such as pulverized chips and dust from intruding into the inside of the housing, in the power tool of Patent Document 1, a rear cover needs to be provided in addition to the housing, which has the inconvenience of increasing the number of parts necessary for assembling the power tool.
In addition, in the electric tool of Patent Document 2, in order to prevent the fan housed in the case from being damaged by foreign matter, a filter is required as another component in addition to the case, so there is the inconvenience of increasing the number of parts as in Patent Document 1.

Method used

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Embodiment Construction

[0025] refer to Figure 1 to Figure 5 Embodiments of the present invention will be described. Such as figure 1 as well as figure 2 As shown, the hammer drill 1 has a housing 2 . The casing 2 is formed by assembling the left and right half casings made of resin, and has a main body 3 , a handle 4 , and a battery pack mounting portion 5 . In addition, the hammer drill 1 is an example of the electric tool of the present invention.

[0026] The main body portion 3 is formed in a cylindrical shape along the front-rear direction of the hammer drill 1 ( figure 1 as well as figure 2 left and right) stretch settings. In the front of the main body part 3 ( figure 1 as well as figure 2 on the right side) to assemble the hammer case 10. In addition, in the rear of the main body part 3 ( figure 1 as well as figure 2 on the left side) accommodates the motor M. The hammer housing 10 is formed into a bell-shaped cylindrical body made of metal (for example, aluminum), and the o...

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Abstract

The present invention provides an electric power tool capable of suppressing damage to a fan accommodated in a housing and cooling a motor due to foreign objects without increasing the number of components. The impact drill (1) is formed with a windshield (30) on the outside of the centrifugal fan to communicate the inside of the casing with the outside on the casing (2), and the following components are accommodated in the casing (2): motor (M); Centrifugal fan (F), which is installed on the output shaft (14) of the motor to cool the motor; and an annular air collecting part (33), which is arranged between the motor and the centrifugal fan, and collects the cooling air based on the centrifugal fan , in the above hammer drill (1), the wind collecting member is provided with a wall (34) located inside the windshield.

Description

technical field [0001] The present invention relates to an electric power tool in which a housing for housing a motor, a centrifugal fan for cooling the motor, and an annular air collecting member for collecting cooling air from the centrifugal fan is formed so that the inside of the housing is formed on the outside of the centrifugal fan. Windows that communicate with the outside. Background technique [0002] For example, Patent Document 1 discloses that an air inlet for cooling the motor is formed on the end face of the housing of the electric tool, and that the rear cover is mounted on the end face so that a band-shaped through-part is inserted at a position that is inconsistent with the above-mentioned inlet, and An electric tool with a gap provided between the above-mentioned end face and the rear cover. According to the power tool of Patent Document 1, since the size of the gap between the end surface of the housing and the rear cover is smaller than the size of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25F5/00H02K9/06H02K9/26
CPCH02K9/06H02K9/26H02K7/145B25F5/008H02K5/207B25F5/02
Inventor 熊谷龙之助
Owner MAKITA CORP