JP2003220547A - Power tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power tool for forming radial patterns. <P>SOLUTION: The power tool is constructed such that the output shaft 4 turns one time around it's own axis in a opposite direction of a revolving direction while the annular-shaped grinding member 7 installed on the output shaft 4 revolves one time. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power tool such as a sander that forms a radial pattern by planetary rotation.

[0002]

2. Description of the Related Art Conventionally, no electric power tool has been provided for directly processing a radiation pattern on a material to be ground.

[0003]

Although there are various patterns of decorative plates made of stainless steel or aluminum used in vehicles such as trucks, those that can be corrected with a sander after scratches have concentric circles. It was limited to scales and straight hairline patterns. The concentric hairline pattern could be corrected by rotating a round tooth, and the straight hairline pattern could be corrected by a line sander or manual reciprocating motion. Currently, there are few patterns to choose from, so there is a need for a new impression that can be modified later.

An object of the present invention is to provide a power tool capable of forming a radial pattern as a new impression pattern.

[0005]

An object of the invention is to provide an electric power tool having a motor accommodated in a body, a speed reducer for reducing the output of the motor, and an output shaft for planetary rotation by the output from the speed reducer. In (1), while the circular ring-shaped grinding member provided on the output shaft revolves once, the output shaft rotates once in the direction opposite to the revolving direction.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an electric power tool according to this embodiment.
~ It demonstrates using FIG. FIG. 1 is a partial vertical cross-sectional side view of a regular polygonal sander showing an embodiment of an electric power tool in the present embodiment, and FIG. 2 is a radial pattern by a regular polygonal sander in the present embodiment and an explanation for forming the radial pattern. FIG. 3 and FIG. 3 are explanatory views showing an application example of the radial pattern by the regular polygonal sander in the present embodiment.

In FIGS. 1 and 2, the rotational force of the motor 1 is reduced by the reduction gear device 2 and transmitted to the idle gear 3B. The idle gear 3B engages with the ring gear 3A to perform a rotation movement while revolving. At this time, the tip 7'of the toy attached to the output shaft 4 integrated with the idle gear 3B
Performs a motion as shown in FIG. 2 to form a radiation pattern.
That is, a ring gear 3A and an idle gear 3B having an output shaft 4 and meshing with the ring gear 3A are provided at the final stage of the speed reducer 2, and a ring-shaped tooth 7 or sanding paper or pad is attached to the output shaft 4. Thus, the structure can be rotated once in the direction opposite to the revolving direction to make radial grinding marks while revolving once. Further, since there are two output shafts 4 and one pair is formed at the balance position, it is configured so that the vibration of the main body and the vibration of the tooth 7 can be reduced to finish the pattern cleanly and quickly. Note that the tool 7 may be provided with a swinging mechanism or a cushion mechanism like the cushion 8 so that the tooth 7 follows the surface to be ground.
Is not limited to the one in which the abrasive is mixed, but may be only the pad. In that case, the grinding marks are formed while the abrasive is attached.

Next, the principle for making a grinding mark will be described with reference to FIGS. 3A is the pitch circle of the ring gear,
3B is the pitch circle of the idle gear, and 7'is the tooth 7 in FIG.
The contact surface 7'having a ring shape and the pitch circle 3B of the idle gear coincide with each other. The relationship between the pitch circle 3A of the ring gear and the pitch circle 3B of the idle gear is
"Diameter of pitch circle 3A of ring gear: diameter of pitch circle 3B of idle gear = 2: 1".

When "bottom circle: adduction circle = 2: 1", the locus (cycloid) of points on the circumference of the adduction circle becomes a straight line.
The pattern formed by the contact surface 7'of the circular ring-shaped toy that is equal to the diameter of the pitch circle 3B of the idle gear is a collection of straight lines and forms a radial pattern.

When the ratio of the diameter of the pitch circle 3A of the ring gear to the diameter of the pitch circle 3B of the idle gear is expressed by the relationship between the revolution angle and the rotation angle, "revolution angle: revolution angle = 1: 1" is obtained. The directions are opposite to each other.

According to the principle described above, it is possible to process the radial patterns shown in A, B, and C of FIG. 3, and various patterns other than these can be formed, which is more preferable in combination with conventional patterns. It becomes possible to form a pattern. It should be noted that the pattern can be formed in a radial shape by partially cutting the annular shape of the toy 7 ', so that a further pattern can be formed.

From the above, a new impression of a radiation pattern can be formed, and even if it is scratched,
It can be repaired later with a tool.

[0013]

According to the present invention, while the circular ring-shaped grinding member provided on the output shaft revolves once, the output shaft revolves once in the direction opposite to the revolving direction to form a radiation pattern. A power tool to be formed can be provided.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of a regular polygonal sander showing an embodiment of an electric power tool according to the present invention.

FIG. 2 is an explanatory diagram for forming a radial pattern by a regular polygonal sander according to the present invention and forming the radial pattern.

FIG. 3 is an explanatory diagram showing an application example of a radial pattern by a regular polygonal sander according to the present invention.

[Explanation of symbols]

1 is a motor, 2 is a reduction part, 3A is a bottom circle or ring gear or ring gear pitch circle, 3B is an adder circle or idle gear or idle gear pitch circle, 4 is an output shaft, 6 is a tip tool holding part, and 7 is A toy or sanding paper or pad, 7'is a contact surface, 8 is a cushion, and 10 is a body.

Claims (4)

[Claims] 1. A power tool comprising a motor housed in a body, a speed reducer for decelerating the output of the motor, and an output shaft for planetary rotational movement by the output from the speed reducer. An electric tool characterized in that the output shaft rotates once in a direction opposite to the revolution direction while the provided annular grinding member revolves once. 2. The electric power tool according to claim 1, wherein the grinding member is a ring-shaped tooth. 3. The electric tool according to claim 1, wherein the grinding member is an annular sanding paper. 4. The electric tool according to claim 1, wherein the grinding member is an annular pad.