JPH06117494A - Balance piece fitting method - Google Patents

Abstract

PURPOSE:To provide a balance piece fitting method enabling the simple fitting of balance pieces to a rotor shaft, made of material to which the balance pieces cannot be fitted by welding, by winding a band, to which the balance pieces can be welded, around the rotor shaft. CONSTITUTION:A band 4 to which balance pieces 3 can be welded, with the length slightly shorter than the peripheral length of a shaft 2 is wound around the shaft 2 and temporarily fastened. In the temporarily fastened state, balance measurement is performed. The mutually opposed end parts 4a, 4b of the band 4 are bridged in appropriate positions by appropriate balance pieces 3, and the respective end parts of the balance pieces 3 are welded to the end parts in contact with the band 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balance piece mounting method for balancing the rotation of a rotating body having a shaft, for example, a propeller shaft.

[0002]

2. Description of the Related Art Conventionally, in order to balance the rotation of such a propeller shaft, it has been common to weld a balance piece directly to the peripheral surface of the propeller shaft itself.

[0003]

However, recently, due to material innovation, a rotating body having a shaft is often manufactured from a material to which a balance piece cannot be attached by welding.

Therefore, it is an object of the present invention to be able to attach a balance piece to a shaft of a rotating body of a material to which the balance piece cannot be attached by welding, and to a place where it is difficult to attach the balance piece by welding. To get the balance piece mounting method.

[0005]

To achieve this object, in the balance piece mounting method according to the present invention,
A balance piece can be welded, and a band with a length slightly shorter than the circumference of the shaft is wrapped around the shaft to temporarily fix it, and then balance measurement is performed in the temporarily fixed state. It is characterized in that the balance piece is bridged at an appropriate position and each end portion of the balance piece is welded to an end portion abutting the band.

[0006]

According to this mounting method of the present invention, the balance piece performs not only the function of balancing the rotating body but also the function of tightening the band around the shaft, which makes it difficult to mount the balance piece. Securely fixed to the body shaft.

[0007]

The preferred embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows an embodiment in which the method of the present invention is applied to a part of a drive shaft 2 having a yoke 1 of a universal joint as a rotating body.

According to the method of the present invention, the band 4 capable of performing the balance piece welding for welding the balance piece 3 is wound around the peripheral surface of the shaft 2. The length of the band 4 is slightly shorter than the circumference of the shaft 2. This band 4 is wound around the peripheral surface of the shaft 2 and temporarily fixed, and the balance is measured in the temporarily fixed state. The ends 4a and 4b of the band 4 which are opposed to each other are bridged at appropriate positions by the appropriate balance piece 3 to form a balance piece. Each end of 3 is welded to the vicinity of the ends 4a and 4b which abut on the band, for example, by spot welding (spot welding points are shown by reference numeral 5).

In the preferred embodiment, as shown in FIG. 1 (b), the side edges of both sides of the band 4 are bent inward toward the winding surface side, and the circumferential surface around which the band of the shaft 2 is wound. An annular groove 6 having a width slightly smaller than the width of the band excluding the bent portion 4c is provided at the end of the band, and the spring action of the bent portion 4c of the band presses the side wall 6a of the annular groove of the shaft to temporarily fix it. Further, the temporary fixing can be reinforced by other temporary fixing means.

Furthermore, in the preferred embodiment, the edge of the bent portion 4c of the band is serrated as shown in FIG. With this serrated edge, the gripping force on the peripheral surface of the shaft 2 is improved, and relative rotation of the band with respect to the rotating body during temporary fixing and after welding the balance piece can be reliably prevented.

[0012]

According to the method of the present invention, by winding a band on which a balance piece can be welded around a shaft of a rotating body, a shaft of a rotating body made of a material in which the balance piece cannot be attached by welding, In addition, welding makes it possible to easily attach the balance piece to a place where it is difficult to attach the balance piece.

[Brief description of drawings]

1 shows an embodiment in which the method of the present invention is applied to a part of a drive shaft having a universal joint yoke as a rotating body, (a) is a side view of the shaft, and (b) is an ellipse A of (a). It is an expanded longitudinal cross-sectional view of the portion shown.

FIG. 2 is a perspective view of a preferred embodiment of a band capable of welding a balance piece used in the method of the present invention in a wound state.

[Explanation of symbols] 1 Yoke 2 Shaft 3 Balance piece 4 Band 4a, 4b Band end 4c Bent part 5 Spot welded part 6 Annular groove

Claims (4)

[Claims] 1. A balance piece mounting method for balancing the rotation of a rotating body having a shaft, wherein a balance piece can be welded and a band having a length slightly shorter than the circumference of the shaft is wound around the shaft. Temporarily fix the balance, measure the balance in the temporarily fixed state, and bridge the opposite ends of the band at appropriate positions with appropriate balance pieces and weld each end of the balance piece to the end part that abuts the band. A balance piece mounting method characterized by comprising: 2. The side edges on both sides of the band are bent inward toward the winding surface side, and the peripheral surface of the shaft around which the band is wound is slightly smaller than the width of the band excluding the bent portion. 2. The balance piece mounting method according to claim 1, wherein an annular groove having a width is provided, and the spring action of the bent portion of the band presses the side wall of the annular groove of the shaft to temporarily fix the balance piece. 3. The method of attaching a balance piece according to claim 2, wherein at least a part of the edge of the bent portion of the band is formed in a sawtooth shape. 4. The balance piece mounting method according to claim 1, wherein the balance piece is welded by spot welding.