JPH0560123A - Drive shaft made of composite material - Google Patents

Abstract

PURPOSE:To uniformly distribute an adhesive sticking a tube made of a composite material and a yoke made of a metal in the whole recess. CONSTITUTION:A recess 14 for the adhesive of a yoke is wholly extended in the peripheral direction and partitioned at an interval in the axial direction by the first land section 16 and the second land section 17, and multiple partition sections 18, 19 extended in the axial direction between the land sections 16, 17 at an interval in the peripheral direction are provided. These partition sections 18, 19 are arranged so that one partition section 18 is closely stuck to the first land section 16 at a gap 20 for a passage from the second land section 17 and the other partition section 19 located adjacently to the partition section 18 is closely stuck to the second land section 17 at a gap 22 for a passage from the first land section 16. A tube portion covering the recess 14 has two holes 24, 26 communicated to the recess 14 nearly on the diameter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive shaft, and in particular,
A tube made of composite material such as fiber reinforced plastic,
The present invention relates to a drive shaft made of a composite material such as a propeller shaft for a vehicle, which is formed by joining a metal yoke and an adhesive.

[0002]

2. Description of the Related Art A tube made of a composite material and a metal yoke inserted in the tube are provided, and at least one of the tube and the yoke is overlapped with each other.
A drive shaft made of a composite material provided with a recess for holding an adhesive for adhering the two has been proposed (Japanese Utility Model Publication No. 62-50316).

To bond the tube and the yoke with an adhesive in order to manufacture the drive shaft, after applying the adhesive to the recess, the yoke is inserted into the tube, or
After inserting the yoke into the tube, it may be possible to inject the adhesive into the recess.

[0004]

In the case where the adhesive is applied to the concave portion, when the yoke is inserted, a part of the adhesive may be scraped off, resulting in poor adhesion.
On the other hand, in the case where the adhesive is injected into the recesses, the adhesion failure due to scraping does not occur, but the adhesion failure may occur because the adhesive is not evenly distributed over the entire recesses.

In the state where the yoke is connected to the tube, neither the defective adhesion due to the scraping nor the defective adhesion due to the uneven distribution of the adhesive cannot be repaired, and there is no difference in both points. However, the former adhesion failure occurs rather inevitably at the time of joining the yoke and the tube, while the latter adhesion failure can be improved by the structure of the recess. It can be said that injecting the agent into the recess is better than inserting the yoke into the tube after applying the adhesive to the recess.

It is an object of the present invention to provide a composite drive shaft capable of evenly distributing an adhesive for bonding a composite tube and a metal yoke to the entire recess.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to a tube made of a composite material formed of a resin and a reinforcing fiber, and a tube which is inserted into the tube and is bonded to the tube by an adhesive. And a yoke made of metal having a concave portion for. The recessed portion of the yoke is defined by a first land portion and a second land portion that extend over the entire circumference in the circumferential direction and are spaced in the axial direction, and extend in the axial direction between the land portions, It has a plurality of partition portions that are circumferentially spaced. In these partition parts, one partition part is in close contact with the first land part and a clearance for passage is provided from the second land part, and
Another partition located adjacent to one partition is the second partition.
Of the first land portion and a clearance for a passage from the first land portion. The portion of the tube that covers the recess has two holes approximately in diameter that communicate with the recess.

[0008]

[Operation and effect] When the tube is arranged so that the two holes of the tube are in the vertical direction and the adhesive is injected from one of the holes, the adhesive moves along the partition, and the partition and one of the It reverses through a gap between the partition and the land, and moves along another partition located below or above the partition. As this moves, air escapes from the other hole.

Since the adhesive moves in one direction along one partition in the recess, reverses through the clearance, and then moves along the other partition in the opposite direction to the one direction. ,
The adhesive can be spread all over the concave portion.

Since the moving direction of the adhesive and the escape direction of the air in the recess are substantially the same, it is easy to escape the air. As a result, the possibility that air will be mixed into the adhesive agent is significantly reduced, so that it is possible to suppress the occurrence of defective adhesion due to air bubbles.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A drive shaft, as shown in FIGS. 1 and 2, includes a tube 10 made of composite material and a yoke 12 made of metal.

The tube 10 is made of, for example, an epoxy resin and is a composite material in which a plurality of layers of carbon fibers are laminated in the radial direction.

The yoke 12 is made of steel or other metal, has a recess 14 for an adhesive on the outer periphery of the portion to be inserted into the tube 10, and further has a spider shaft of a cross joint known per se. It has a portion 15 to be joined.

The concave portion 14 of the yoke has two land portions 16 and 1 extending in the entire circumference in the circumferential direction and spaced apart in the axial direction.
7 and has a plurality of circumferentially spaced partitions 18, 19 extending axially between the lands 16, 17.

The plurality of partition portions 18 and 19 are arranged such that one partition portion 18 is in close contact with the land portion 16 and a clearance 20 for the passage is provided from the land portion 17, and the partition portions 18 are adjacent to each other. The partition portion 19 is arranged so as to be in close contact with the land portion 17 and to leave a clearance 22 for the passage from the land portion 16. It is preferable to include at least one partition 18 and at least one partition 19.

A plurality of partitions 18, 19 are also arranged substantially symmetrically with respect to the vertical plane including the axis of the yoke 12 and on the side opposite to the one shown in the drawing, so that the adhesive moves on both sides of the vertical plane. It can be so. The yoke 12 including the partition portions 18 and 19 can be formed by casting, for example.

Two holes 24, 26 are provided approximately on the diameter of the tube 10, and these holes 24, 26 communicate with the recess 14 of the yoke 12.

In the illustrated embodiment, the land portion 1 of the yoke
The outer diameter D2 of 6, 17 is equal to the inner diameter D1 of the tube 10,
Slightly larger. The outer diameter of the plurality of partition portions 18 and 19 is equal to the outer diameter of the land portions 16 and 17.

In the above structure, the yoke 12 is connected to the tube 10.
When it is inserted into the, it will be slightly pressed or slightly pressed, so that the clearance between the lands 16 and 17 and the tube 10 can be eliminated. The adhesive tends to temporarily reduce its viscosity when heated for curing.
Therefore, if there is a gap between the land portions 16 and 17 and the tube 10, the adhesive may flow out from the gap, but the above-mentioned configuration can prevent such an accident.

Further, the partition parts 18 and 19 are also provided in the tube 10.
Since it is pressed into or is pressed into, the torque transmission can be shared by the partition parts 18 and 19, and the torque distribution of the adhesive can be reduced accordingly. In other words, it is possible to increase the torque that can be transmitted by the drive shaft.

After inserting the yoke 12 into the tube 10, the two holes 24 and 26 of the tube 10 are positioned vertically, and one of the two holes 24 and 26, for example, the upper hole 24.
The adhesive is injected under pressure into the recess 14. The injected adhesive moves along the partition 19 as shown by the solid arrow A in FIG. 2, reverses through the clearance 22, and moves along the partition 18 in the opposite direction. .. After that, clearance 2
It reverses after passing through 0 and moves along the partition part 19. Sequentially
Such reversal movement is repeated. On the other hand, the air escapes in the same direction as the movement of the adhesive, as indicated by the dashed arrow B.

As shown in FIG. 3, the concave portion 34 of the yoke 32 is formed.
All of the partition parts 36 to be placed inside are the land parts 3 on one side.
7 and the gap 40 is formed from the other land 38, a part of the adhesive injected from the hole 42 above the tube 30 moves in a direction away from the gap 40 along the partition 36. Moved and part of the adhesive has a clearance of 4
Move down through 0. As a result, the adhesive that moves along the partition 36 moves the air toward the land 37, and the air cannot escape. This causes bubbles to cause poor adhesion, but according to the present invention, poor adhesion due to bubbles hardly occurs.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state before connecting a tube of a drive shaft and a yoke according to the present invention.

FIG. 2 is a sectional view of an essential part of a drive shaft according to the present invention.

FIG. 3 is a cross-sectional view of a main part of a comparative example for showing the effect of the drive shaft according to the present invention.

[Explanation of symbols]

 10 tube 12 yoke 14 recess 16 and 17 land 18 and 19 partition 20 and 22 clearance 24 and 26 holes

Claims (1)

[Claims] 1. A tube made of a composite material formed of a resin and a reinforcing fiber, and a metal having a concave portion for the adhesive on the outer periphery, which is inserted into the tube and is joined to the tube by an adhesive. And a concave portion of the yoke, the concave portion being defined by a first land portion and a second land portion that extend over the entire circumference in the circumferential direction and are spaced in the axial direction. And a plurality of partition portions that extend in the axial direction between the land portions and are spaced in the circumferential direction, and one partition portion is in close contact with the first land portion and A clearance for the passage is provided from the second land portion, another partition portion located adjacent to the one partition portion is in close contact with the second land portion, and a clearance for the passage is provided from the first land portion. It is arranged to put The portion of the tube that covers the recess is
A drive shaft made of a composite material, which has two holes that communicate with the recess and are substantially on the diameter.