KR100253456B1 - Composite Shaft of Low Vibration and Manufacture - Google Patents

Abstract

PURPOSE: An outside complex propeller shaft and a method for manufacturing the same are provided to connect a metallic flange and tube material precisely without bubble or a noncontact portion on an adhesive layer. CONSTITUTION: A spacer(20) is installed in an outer periphery of a shaft joint part(12), and a ring body(22) is inserted to the end of the shaft joint part in a flange(10). The closed space is formed between the spacer and the ring body with fitting a tube member(14) to the shaft joint part. An adhesive layer(16) is charged without bubble or a noncontact portion by injecting adhesive into an injection hole of the shaft joint part till discharging to the other injection hole, and hardened by heat treatment. The adhesive layer is spread with epoxy, urethane, polyester, cyanoacryl or vinyl ester group.

Description

Low vibration composite propulsion shaft and its manufacturing method {Composite Shaft of Low Vibration and Manufacture}

The present invention relates to a composite propulsion shaft that can be used in ships or vehicles, etc., and relates to a low vibration composite propulsion shaft and a method of manufacturing the same, which is light in weight and robust, and in particular, so that no crack is caused by the adhesive layer at the joint portion of the joint.

A propulsion shaft that generates propulsion in ships or vehicles is a member that transmits engine power to screws or wheels.

Referring to FIG. 3, the propulsion shaft 6 is divided into several members with flanges at both ends. It is disposed along the shaft tunnel provided in the. The flange is changed from a propulsion shaft for the vehicle to a universal joint.

In general, the material of the propulsion shaft 6 is made of metal, but this has a problem of causing a large force due to its high mass, and studies to introduce new materials have been steadily conducted. Glass or carbon fiber composites are known as new propulsion shaft materials, and they are considered to satisfy the characteristics of propulsion shafts that need to generate large torque without vibration due to their light weight and excellent mechanical strength. However, as is well known, glass or carbon fiber composites are poor in formability, so that the flanges cannot be integrally formed when molded into the propulsion shaft.

For this reason, the low vibration propulsion shaft using glass or carbon fiber composite material is formed by forming flanges at both ends of steel material and joining them integrally by forming an intermediate tubular member from glass or carbon fiber composite material (hereinafter referred to as tubular member). have.

Joining method, as disclosed in Japanese Patent Application Laid-Open No. 6-10940, drills a hole in the outer circumferential surface of the tubular member, inserts a fastening element such as a bolt or rivet, and connects it with a flange or a universal joint, and again, the outer circumferential surface of the fastening element Is coated with a metal ring to prevent stress concentration, and glass beads are added to the adhesive layer applied to the outer circumferential surface of the shaft joint as disclosed in British Patent No. 2,127,938, so that the gap between the flange and the tubular member is increased. It is known to keep it constant.

In this way, although the fastening element is covered and protected by the metal ring, the load is concentrated on the inserted hole or the cutting edge, so that the hole is gradually widened, and the crack is gradually diffused, leading to breakage of the tubular member. The result is also complicated to assemble. The latter should be inserted while twisting the tubular member in the circumferential direction at the time of joining. In this process, the glass beads of the adhesive layer slide and form discontinuities of the adhesive layer. Under the influence of repetitive stretching and the stress caused by repeated rotation and stoppage, the adhesive layer fragments, which are partially peeled off from the shaft joint of the flange, are rubbed and damaged by the surface of the metal flange. There is a problem that rust is generated and peeled off at the joint surface of the metal flange.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems seen in the low vibration propulsion shaft of a structure in which a metal flange and a tubular member are joined to each other, and the metal flange and the tubular member are exactly concentrically connected to each other. It is to provide a low vibration composite propulsion shaft that prevents unbonded parts.

Another object of the present invention is to provide a method for producing a low vibration composite propulsion shaft which can be concentrically joined by inserting and connecting a tubular member to the outer circumference of a metal flange, so that bubbles or unbonded portions are not contained in the adhesive layer.

The present invention for realizing the above object has a tube-like member made of glass or carbon fiber composite, and a tip end portion formed with a taper and having a spacer integrally or fixedly attached to a predetermined portion of the outer periphery, and having a predetermined distance along the axial direction. And a pair of injection holes formed of symmetrically formed shaft joints with a metal flange as a central axis, and a ring body fixedly attached to an outer circumferential surface of the shaft joint, and between the inner circumferential surface of the tubular member and the outer circumferential surface of the shaft joint. It becomes a structure which is integrally joined by the contact bonding layer forcibly injected through.

The present invention of such a configuration is formed by the spacer and the ring body formed between the flange and the tubular member is formed in a closed space that is uniformly and concentrically matched throughout the outer circumference, and is forced through the injection hole of the shaft joint The injected adhesive layer joins between the flange and the tubular member in a good state in which bubbles or unbonded parts are not included therein.

In addition, the manufacturing method of the present invention is a step of fitting the tubular member to the shaft joint portion of the metal flange to maintain a constant space between the spacer and the ring body to form a closed space, and adhesive through the injection hole of the shaft joint portion Is injected into the space between the tubular member and the heat treatment is performed to fix the adhesive layer.

In the relative movement along the axial direction, the spacer is guided by the tip-side taper of the shaft joint and is easily concentrically combined to form a closed space by the ring body, and the adhesive layer is injected through one injection hole to inject the other. As a part is leaked into the ball is forcedly injected to join the tubular member and the flange in a state in which there are no bubbles or unbonded parts therein.

In the present invention, the adhesive layer is preferably epoxy, urethane, polyester, cyanoacrylic or vinyl ester.

1 is a side cross-sectional view showing the configuration of a low vibration propulsion shaft according to the present invention.

FIG. 2 is a side view seen in the direction of arrow II of FIG. 1; FIG.

3 is a state diagram before assembling for explaining a production example of a low vibration propulsion shaft according to the present invention;

4 is a schematic side cross-sectional view showing an arrangement relationship between a screw and a propulsion shaft thereof in a ship.

* Description of the symbols for the main parts of the drawings *

10 flange 12 shaft connection

14 tube-like member 16 adhesive layer

18: injection hole 20: spacer

22: ring body

Preferred embodiments of the present invention described above will be described in detail with reference to the accompanying drawings.

1 is a side cross-sectional view showing the configuration of a low vibration propulsion shaft according to the present invention, wherein reference numeral 10 is a flange having a hollow shaft joint 12 at its center. The tubular member 14 is inserted into and connected to the outer circumference of the shaft joint 12 of the flange 10, and between them is fixed integrally by an adhesive layer 16 applied to the outer circumferential surface of the shaft joint 12.

In addition, the tip of the shaft joint portion 12 is formed of a taper and a pair of injection holes 18 are drilled in the main surface thereof, and the flange 10 is more in agreement with these injection holes 18. The spacer 20 is installed in the position adjacent to the (). The injection hole 18 is installed symmetrically with a predetermined interval along the axial direction of the axial joint 12, the spacer 20 is manufactured integrally or separately from the axial joint 12, a predetermined location It will be fixed to.

In the case where the spacer 20 is separately manufactured and attached, the material is preferably engineering plastic.

On the other hand, the ring body 22 is inserted and fixed to the outer peripheral surface of the tip side of the shaft joint 12.

The ring body 22 defines a space isolated from the outside by closing a gap formed between the shaft joint 12 and the tubular member 14.

In this configuration, the adhesive layer 16 interposed between the axial joint 12 and the tubular member 14 is filled through the injection hole 18 and the flange 10 and the tubular member 14 as shown in FIG. 2. ) Is integrally bonded.

The low vibration propulsion shaft according to the present invention is precisely coaxially connected by the action of the spacer 20 and the ring body 22 when the flange 10 and the tubular member 14 are axially coupled by the above structure, and the adhesive layer ( 16) is forcibly injected into the closed space by the wedge ring 22, so that no bubbles or unbonded parts are included therein, and a part thereof is not peeled off.

3 is a process chart showing a production example of a low vibration propulsion shaft according to the present invention.

In the manufacturing method of the present invention, the spacer 20 is integrally or separately manufactured so that the ring body 22 is inserted and fixed to the outer peripheral end side of the shaft joint portion 12 of the flange 10 provided at the outer peripheral predetermined position of the shaft joint portion 12. Next, the tube-shaped member 14 is fitted to the shaft joint portion 12 so that a closed space defined by the spacer 20 and the ring body 22 is formed, and one injection hole 18 of the shaft joint portion 12 is formed. The adhesive layer is forced to be injected into the other injection hole until the part is leaked into the other injection hole, and the adhesive layer 16 is filled, heat treated and cured so that bubbles or unbonded parts are not formed therein.

In addition, in the present invention, the adhesive layer 16 may be applied in combination with one or two or more selected from epoxy, urethane, polyester, cyanoacrylic, and vinyl esters, and the flange 10 and the tube may be applied. The relative movement of the top member 14 can be done by either movement or by simultaneous movement of both.

The present invention described above has the effect that the spacing between the axial joint of the flange and the tubular member is formed uniformly over the circumferential surface so that it is accurately concentrically connected, and the filling is formed at the interval between the axial joint of the flange and the tubular member. Since the adhesive layer is forcedly injected, it does not include bubbles or unbonded parts therein, so that the adhesive force between the flange and the tubular member is best, and furthermore, the crack does not occur even after long-term use, thereby extending the service life. The effect is that the process of joining and the process of joining is a simple method that does not differ from the conventional method, so that the productivity is good and no special equipment is required, and thus the cost is not incurred.

Claims (3)

A tube-shaped member made of glass or carbon fiber composite material, a tip formed with a taper, and a spacer is integrally inserted or inserted into a predetermined position on the outer circumference, and a pair of injection holes are symmetrically drilled at a predetermined distance along the axial direction. And a space between the inner circumferential surface of the tubular member and the outer circumferential surface of the shaft joint formed of a flange retaining the joint and a ring body closing the space formed between the tubular member and the shaft joint and closed by the spacer and the ring body. Low vibration composite propulsion shaft characterized in that the configuration is integrally bonded by an adhesive layer injected through the injection hole. The low vibration composite propulsion shaft according to claim 1, wherein the adhesive layer is one or two or more of epoxy, urethane, polyester, cyanoacrylic and vinyl esters. Inserting and installing a ring body in a shaft joint of a metal flange provided with a spacer at a predetermined outer circumference, and then fitting a tubular member thereon to form a closed space having a uniform interval between the spacer and the ring body; A method of manufacturing a low vibration composite propulsion shaft, characterized in that the step of forcibly injecting the adhesive into one of the injection holes of the adhesive is filled in the closed space until the part leaks through the other injection hole and heat treated to cure.

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