US 12,617,067 B2 · Impact tool, spindle, and spindle manufacturing method

Abstract

An impact tool includes: a motor; a sun gear rotated by the motor; and at least three planet gears, which mesh with the sun gear; an internal gear, which meshes with the planet gears. A spindle includes a flange portion having a hole in an axial direction for the insertion of the sun gear, and slit portions in at least a side surface thereof for mounting the planet gears, and a shaft portion extending forward from the flange portion in the axial direction. The flange portion is shaped by forging. A hammer is held on the spindle; an anvil is impacted by the hammer in a rotational direction. A hammer case houses the hammer and holds the anvil in a rotatable manner; a tool-accessory retaining part is formed on the anvil; and a coil spring biases the hammer toward the anvil.

Claims20

Dependent claims

An impact tool comprising:

a motor;
a sun gear rotated by the motor;
at least three planet gears, which mesh with the sun gear;
an internal gear, which meshes with the planet gears;
a spindle, which includes a flange portion—having a hole in an axial direction in which the sun gear is inserted, and slit portions in at least a side surface thereof in which the planet gears are mounted—and a shaft portion extending forward from the flange portion in the axial direction, at least a portion of the flange portion having been shaped by forging;
a hammer, which is held on the spindle;
an anvil configured to be impacted by the hammer in a rotational direction;
a hammer case, which houses the hammer and holds the anvil in a rotatable manner;
a tool-accessory retaining part, which is provided on the anvil;
and
a coil spring, which biases the hammer toward the anvil;
wherein grain flows in the flange portion of the spindle are formed by the forging to extend outward from the center of the radial direction.

9 more elements

Dependencies are inferred from the claim text.

Impact tool, spindle, and spindle manufacturing method

Life of this patent

Impact tool, spindle, and spindle manufacturing method

Life of this patent

Abstract

Claims20