JP3390192B2 - Balance piece mounting method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a balance piece for welding a balance having a shaft, such as a propeller shaft, by welding.

[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 method of attaching the balance piece according to the present invention, it is possible to weld the strip-shaped balance piece to the annular groove provided on the peripheral surface of the shaft. Wrap a band with a length slightly shorter than the circumference of the shaft to temporarily fix it,
And, this temporary fixing, the side edge on both sides of the band,
While bending inward toward the winding surface side, the annular groove has a width slightly smaller than the width of the band excluding the bent portion, and the band is crimped to the side wall of the annular groove of the shaft by the spring action of the bent portion of the band. The balance is measured in the temporarily fixed state.
The gap between the opposite ends of the band is bridged at an appropriate position by an appropriate balance piece, and each end of the balance piece is welded to an end portion abutting the band. To do. Also,
It is preferable that at least a part of the edge of the bent portion of the band is formed in a sawtooth shape, and in addition, the welding of the balance piece is more preferably performed by spot welding.

[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, a band 4 capable of performing 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. Wrap this band 4 around the circumference of the shaft 2 and temporarily fix it,
The balance is measured in a temporarily fixed state, and the gap between the ends 4a and 4b of the band 4 which face each other is bridged at an appropriate position by the appropriate balance piece 3 to bring the respective ends of the balance piece 3 into contact with the band. In the vicinity of 4a, 4b, for example,
Spot welding (Spot welding points are indicated by reference numeral 5)
To weld.

Further, in the present invention, the band 4 is attached to the shaft 2
As shown in FIG. 1 (b), the side edges of both sides of the band 4 are bent inward toward the winding surface side as a means for temporarily fixing to the circumferential surface of , The annular groove 6 having a width slightly smaller than the width of the band excluding the bent portion 4c is provided, and the band 4 of the shaft 2 is attached to the side wall 6a of the annular groove of the shaft by the spring action of the bent portion 4c of the band. Adopts a structure that is temporarily fixed to the peripheral surface.

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 appropriately winding the band on which the balance piece can be welded around the shaft of the rotary body, the balance piece can be attached to the shaft of the rotary body of a material to which the balance piece cannot be attached. In addition, the balance piece can be easily attached to a place where the balance piece is difficult to attach by welding.

[Brief description of drawings]

FIG. 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 York 2 shafts 3 balance pieces 4 bands 4a, 4b band end 4c bent part 5 spot welding points 6 annular groove

Claims (3)

(57) [Claims] 1. A balance piece attaching method for welding a balance piece for balancing the rotation of a rotating body having a shaft , comprising: an annular groove provided on a peripheral surface of the shaft.
To, be capable of welding the balance piece of strip-shaped temporarily fixed by winding a slightly shorter length of the band than the circumferential length of the shaft, and the temporary fixing is both sides of the band
Bend the side edge of the inward toward the winding surface.
The width of the band except for the bent part.
The width of the band should be slightly smaller than
A band is attached to the side wall of the annular groove of the shaft by the spring action of
The structure is created by crimping , the balance is measured in the temporarily fixed state, and the gap between the opposite ends of the band is measured.
A method of attaching a balance piece, characterized in that the gap is bridged at an appropriate position by an appropriate balance piece and each end of the balance piece is welded to an end portion abutting the band. Wherein at least a portion of the balance piece mounting method of claim 1, wherein forming the serrated edge of the bent portion of the band. 3. A balance piece mounting method according to claim 1 or 2 welding the balance piece was spot-welded.