JPS6358689A - Rotor - Google Patents

Abstract

PURPOSE:To correct an overall unbalanced state of a rotor by forming plural recess parts in a radial form on the surface of the rotor centering on a rotary shaft and stuffing fireclay weights into those recess parts to easily correct the unbalanced revolutions of the rotor. CONSTITUTION:Plural recess parts 6 are formed equidistantly on the surface 4 of a rotor 2 in a radial form centering on a enter axis C. These parts 6 have properly square or oval shapes together with the proper half-blanked thickness. In order to eliminate the unbalanced revolutions of the rotor 2, a fireclay member of an appropriate amount, e.g., a fireclay epoxy adhesive is stuffed into the part 6 at an unbalanced position. As a result, an overall unbalanced state of the rotor 4 is easily corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure of a rotating body. More specifically, the present invention relates to a configuration for eliminating unbalance during rotation of a rotating body.

(Prior Art) In order to eliminate unbalance during rotation of a rotating body normally employed in a magnetic disk drive or the like and to achieve smooth rotation, a conventional rotating body 10 shown in FIG. Concentric grooves 12 were bored on the surface of the body, and an appropriate amount of clay weights 14 were stuffed into appropriate locations within the grooves to correct imbalances during rotation.

(Problems to be Solved by the Invention) In the case of modification using the above configuration, it is technically not easy to set the required amount of clay weight to be packed into the groove, so in order to obtain reliable balancing, It is necessary to repeatedly adjust the amount of clay weight, and this work has problems such as being a tedious process.

(Means and effects for solving the problem) The present invention aims to solve the above problem, and has a plurality of radial positions on the surface of the rotating body at equal intervals centered on the shaft. A concave portion is provided, and an appropriate amount of clay weight for correcting unbalanced rotation is stuffed into the appropriate concave portion at the unbalanced position, thereby correcting the overall unbalance of the rotating body.

(Example) An example of the present invention will be described below with reference to the accompanying drawings. A plurality of recesses 6 are provided on the surface 4 of the rotating body 2 of the present invention at equal intervals in radial positions from the central axis C of the rotating body 2.

The shape of the recess 6 can be appropriately selected, for example, a square shape, an elliptical shape, etc., and its depth may be appropriately formed, for example, half-opened.

In order to eliminate the rotational unbalance of the rotating body 4, the overall unbalance of the rotating body can be easily corrected by filling an appropriate amount of clay material, such as a clay epoxy adhesive, into an appropriate recess at the unbalanced position. be able to.

(Effect) Since the surface of the rotating body according to the present invention is provided with a plurality of recesses at equal intervals in radial positions around the axis, when a rotational unbalance position is found, the recesses existing at that position are immediately replaced. An appropriate amount of clay material can be packed, and an imbalance in the rotation of the rotating body can be quickly and easily corrected without having to frequently correct the packing amount as in the conventional example.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a rotating body according to the present invention. FIG. 2 is a perspective view of a conventional rotating body.

Claims (1)

[Claims] 1. A rotating body, characterized in that a plurality of recesses are provided on the surface of the rotating body radially around the axis, and the rotational unbalance of the rotating body is corrected by filling the recesses with clay weights. . 2. The rotating body according to claim 1, wherein the recess is half-opened. 3. The rotating body according to claim 1, wherein the recessed portion is formed in a square or elliptical shape.