JPH0419443A - Balance weight of propeller shaft - Google Patents

Abstract

PURPOSE:To make mounting possible by one-touch operation in no relation to a material of a tube of a propeller shaft by stopping a band, provided with a weight member, by one-touch operation to an arbitrary part in the periphery of a tube of the propeller shaft and performing unbalance correction. CONSTITUTION:In the case of correcting unbalance of a propeller shaft, a band 10 is wound on the periphery of a tube 20. Here, a weight member 16, fixed by welding or the like to an outer side surface aside to one end part 10a of the band 10, is positioned in an opposite side to a residual unbalance part of the tube 20 with the axial line of the tube 20 serving as the reference. The weight member 16 is fitted to an engaging hole 18 by piling both end parts 10a, 10b of the band 10 by placing the end part 10a, in which the weight member 16 is provided, in a lower side. Under this condition, a fixed condition of the band 10 relating to circumferential and axial directions of this tube 20 is reinforced by biting of fixing hooks, in the internal periphery of the band 10, in the tube 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a balance weight for a composite throat propeller shaft, the tube of which is primarily made of a composite material such as glass fiber reinforcement.

[Conventional technology]

Unlike steel propeller shafts, modifying a composite propeller shaft with an annular lance is difficult because it involves welding a balance weight to the propeller shaft tube. That is, when considering various conditions for the balance weight (centrifugal force, high temperature, action of water, etc.), no welding means that can cope with these conditions has yet been put into practical use.

Therefore, in the technique disclosed in, for example, Japanese Utility Model Application Publication No. 55-61636, a hole is made at the unbalance correction location of the tube in the composite propeller shaft, and a balance weight is fixed therein with a rivet.

[Problem to be solved by the invention]

In the technique disclosed in the above-mentioned publication, it is necessary to form a rivet hole in the tube and caulk the rivet when correcting the imbalance. Therefore, it takes time to correct the imbalance, and the work is troublesome. Furthermore, it is difficult to finely adjust the position of the balance weight when installing it.

A technical object of the present invention is to provide a balance weight that can be attached with one touch regardless of the material of the tube of the propeller shaft, and whose attachment position can also be finely adjusted.

[Means to solve the problem]

In order to solve the above problems, the present invention is characterized in that a band provided with a weight member is fixed at an arbitrary location on the outer periphery of a tube of a propeller shaft with a single touch to correct unbalance.

In other words, the balance weight of the present invention includes a band that can be wrapped around the outer periphery of a propeller shaft tube with an overlap margin at both ends, a weight member fixed near one end of the band, and a band that can be wrapped around the outer circumference of a tube of a propeller shaft with overlap. The engagement hole is formed near the other end and is sized to fit the weight member.

[For production]

According to the above configuration, when correcting the imbalance of the propeller shaft, it is sufficient to simply wrap a band around a predetermined location of the tube. At this time, the opposite side of the residual imbalance point (180° displacement position) with the axis of the tube as a reference.
The weight member is positioned at. By fitting this weight member into the engagement hole, this band is fixed to the outer periphery of the tube.

In this way, the weight member can be attached to the tube of the propeller shaft with one touch, and the position of the weight member can be easily finely adjusted.

〔Example〕

Next, one embodiment of the present invention will be described with reference to the drawings. In the following embodiments, the present invention is applied to a balance weight for a composite propeller shaft.

The balance weight is shown in a perspective view in Figure 1, and the balance weight is shown in a perspective view.
Similarly, the balance weight is shown in a plan view, and FIG. 3 shows the state in which the balance weight is used.

In these drawings, the hand 10 is made of a material such as metal and is formed into an arc shape corresponding to the outer circumference of the tube 20 of the propeller shaft. When this band 10 is wound around the outer periphery of the tube 20, an overlap margin is ensured at both ends of this band IO (see FIG. 2).

A weight member 16 is fixed to the outer surface of the band 10 near one end 10a by welding or the like. Further, an engagement hole 1B having a size in which the weight member 16 fits is formed in the other end 10b of the band IO.

Furthermore, a plurality of fixing hooks 12 are formed at regular intervals along the circumferential direction on the inner surface of the band IO.

The propeller shaft tube 20 is made of a composite material such as carbon and glass fiber reinforced plastic. A joint yoke 22 is coupled to the end of the tube 20.

When correcting the unbalance of the propeller shaft,
The band 10 is wrapped around the outer circumference of the tube 20. At this time, the weight member 16 is positioned on the opposite side of the remaining unbalanced portion of the tube 20 with respect to the axis of the tube 20 as a reference.

Then, overlap both ends 10a and 10b of the band 10 with the end 10a provided with the weight member 16 facing down,
The weight member 16 is fitted into the engagement hole 18. As a result, the band 10 is attached to the outer periphery of the tube 20.

In this state, the fixing hook 12 on the inner circumference of the band 10 bites into the tube 20, and the fixing state of the pan l'' 10 in the circumferential and axial directions of the tube 20 is strengthened.

In addition, with respect to the centrifugal force acting on the weight member 16, the tightening force of the band 10 against the tube 20 increases, so that the attachment of the balance weight to the propeller shaft becomes stable.

The mass of the weight member 16 is set to a value obtained by subtracting the mass of the overlapping portion of the band 10 from the mass required for correcting the imbalance.

〔Effect of the invention〕

As described above, the present invention allows the weight member to be attached to the tube of the propeller shaft with one touch when correcting the imbalance of the propeller shaft, and the attachment position can also be easily finely adjusted.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an external perspective view of a balance weight, FIG. 2 is a plan view of the balance weight, and FIG. 3 is an explanatory view showing the balance weight in use. IO...Band 16...Weight member 18...Engagement hole

Claims (1)

[Claims] A band that can be wrapped around the outer circumference of a tube of a propeller shaft with overlap at both ends thereof, a weight member fixed near one end of the band, and the other end of the band. A balance weight for a propeller shaft, comprising: an engagement hole formed near the bottom and sized to fit the weight member;