Reciprocating cutting tool
A reciprocating cutting tool reduces dispersion of dust. The reciprocating cutting tool includes a reciprocation converter drivable by a motor, a rod-like slider connected to the reciprocation converter to be reciprocable, a blade holder at the front end of the slider to hold a blade, a power transmission housing housing the reciprocation converter and allowing the slider to protrude from its front end, a cover outward from the power transmission housing, and a fan rotatable together with a rotor in the motor. A first passage of cooling air from the fan is defined between the power transmission housing and the cover. The first passage branches into a second passage toward the blade holder and a third passage not toward the blade holder.
1. A reciprocating cutting tool, comprising:
a motor including a stator and a rotor;
a reciprocation converter drivable by the motor;
a rod-like slider, the slider being connected to the reciprocation converter to be reciprocable;
a tip tool holder at a front end of the slider to hold a tip tool;
a power transmission housing that houses the reciprocation converter and allows the slider to protrude from a front end of the power transmission housing;
a fan rotatable together with the rotor; and
a cover outward from the power transmission housing, the cover defining a first passage of cooling air from the fan between the power transmission housing and the cover, the first passage branching into a second passage toward the tip tool holder and a third passage not toward the tip tool holder, wherein
the third passage includes a hole in the power transmission housing.
2. The reciprocating cutting tool according to claim 1 , wherein the third passage includes a wall located in the power transmission housing.
3. The reciprocating cutting tool according to claim 2 , wherein the wall includes a circular arc strip.
4. The reciprocating cutting tool according to claim 2 , wherein
the first passage is between an upper portion of the power transmission housing and an upper portion of the cover.
5. The reciprocating cutting tool according to claim 1 , wherein
the first passage is between an upper portion of the power transmission housing and an upper portion of the cover.
6. The reciprocating cutting tool according to claim 5 , wherein
the hole in the third passage is in the upper portion of the power transmission housing.
7. The reciprocating cutting tool according to claim 5 , wherein
the third passage includes a lower outlet in a lower portion of the power transmission housing.
8. The reciprocating cutting tool according to claim 1 , wherein
the power transmission housing includes an upper power transmission housing, and a lower power transmission housing below the upper power transmission housing.
9. The reciprocating cutting tool according to claim 8 , wherein
the third passage includes a wall located in the upper power transmission housing.
10. The reciprocating cutting tool according to claim 9 , wherein the wall is a circular arc strip.
11. The reciprocating cutting tool according to claim 8 , wherein
the third passage includes a lower wall located in the lower power transmission housing.
12. The reciprocating cutting tool according to claim 11 , wherein
the third passage includes a wall located in the upper power transmission housing, and
the wall has a lower end aligned and continuous with an upper end of the lower wall.
13. The reciprocating cutting tool according to claim 11 , wherein the lower wall is a circular arc strip.
14. A reciprocating cutting tool, comprising:
a motor including a stator and a rotor;
a reciprocation converter drivable by the motor;
a rod-like slider, the slider being connected to the reciprocation converter to be reciprocable;
a tip tool holder at a front end of the slider to hold a tip tool;
a power transmission housing that houses the reciprocation converter and allows the slider to protrude from a front end of the power transmission housing;
a fan rotatable together with the rotor; and
a cover outward from the power transmission housing, the cover defining a first passage of cooling air from the fan between the power transmission housing and the cover, the first passage branching into a second passage toward the tip tool holder and a third passage not toward the tip tool holder, wherein
the slider extends in a front-rear direction,
the reciprocating cutting tool further comprises a lamp configured to illuminate an area in front of the tip tool holder, and
the first passage is separated into two passages by a ridge portion housing a lead wire of the lamp and extending in the front-rear direction.
15. The reciprocating cutting tool according to claim 14 , wherein
the third passage includes two holes in the power transmission housing, and
the two holes are located respectively on two sides of the ridge portion.
16. A reciprocating cutting tool, comprising:
a motor including a stator and a rotor;
a reciprocation converter drivable by the motor;
a rod-like slider, the slider being connected to the reciprocation converter to be reciprocable;
a tip tool holder at a front end of the slider to hold a tip tool;
a power transmission housing that houses the reciprocation converter and allows the slider to protrude from a front end of the power transmission housing;
a fan rotatable together with the rotor;
a cover outward from the power transmission housing, the cover defining a first passage of cooling air from the fan between the power transmission housing and the cover, the first passage branching into a second passage toward the tip tool holder and a third passage not toward the tip tool holder; and
a cylindrical release drum configured to release the tip tool held by the tip tool holder,
wherein the second passage extends radially inside the cylindrical release drum.