JPS58193922A - Driving shaft and manufacture thereof - Google Patents

Abstract

PURPOSE:To increase a contact surface area between the yoke and the resin cylindrical pipe and to enable a characteristic of the shaft to be varied by a method wherein metalic yokes are fitted between the inner and outer double cylinders of the fiber reinforced resin at both ends thereof and adhered integrally. CONSTITUTION:In a driving shaft 1, metalic yokes 4 are fitted between the inner and outer double cylinders 2 and 3 of fiber reinforced resin at both ends thereof, adhesive agent is coated to the adjoining surfaces 4a and 4b between each of the yokes 4 and the cylinders 2 and 3 so as to adhere the cylinders 2 and 3 with the yokes 4 together integrally. In a space enclosed by the cylinders 2 and 3 and the yoke 4 is arranged an auxiliary sleeve 5 of resin. This shaft enables an adhering area between the yoke and the cylinders to be increased and their strength is also increased. At the same time, it is possible to apply a proper characteristic corresponding to an application of the shaft to the shaft by varying the physical characteristic of resin of the inner end outer cylinders.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive shaft using inner and outer cylinders made of fiber-reinforced plastic, and a method for manufacturing the same.

It has been common practice in the past to construct a portion of the drive shaft from lightweight plastic for the purpose of weight reduction. This is a single plastic cylinder with a metal yoke bonded to both ends.

By the way, the adhesive strength between the plastic cylinder and the metal yoke depends on the shear strength of the adhesive and the adhesive area.

Therefore, for adhesives of the same strength, the adhesive strength increases as the adhesive area increases, but with the conventional shaft described above,
Since the metal yoke was glued to the plastic cylinder of the book, an increase in the bonding area inevitably led to an increase in weight, which also went against the goal of reducing weight.

Further, drive shafts are required to have appropriate characteristics depending on their intended use, but conventional shafts using only one plastic cylinder have not been able to fully meet these requirements.

In view of the above-mentioned problems with this type of drive shaft, the inventors of the present invention,
The present invention has been made to effectively solve this problem.

The object of the present invention is a fiber-reinforced plastic interior,
By fitting a metal yoke from both ends between the crab-heavy cylinders and bonding these parts together, it is possible to increase the bonding area and increase the bonding strength, as well as obtain characteristics appropriate to the application. It is an object of the present invention to provide a driving shaft and a highly accurate and rational manufacturing method for the shaft.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a longitudinal sectional side view of a drive shaft 1 according to the present invention.

In the driving shaft 1, reference numerals 2 and 3 denote an inner tube and an outer tube made of fiber-reinforced plastic, respectively, and these inner and outer tubes 2 and 3 have a double cylindrical structure as shown.

As shown in the figure, a metal yoke 4°4 is fitted from both ends of the ring-shaped space formed between the inner and outer cylinders 2.3,
Adhesive is applied to the joint surface 4a with the inner tube 2 and the joint surface 4b with the outer tube 3 of each yoke 4, and the inner and outer tubes 2, 6 and the metal yoke 4.4 are integrated with adhesive. .

Further, an auxiliary sleeve 5 made of plastic and molded into a cylindrical shape is interposed in a space surrounded by both yokes 4, 4 of the ring-shaped space formed by the inner and outer cylinders 2, 3.

The driving shaft 1 is constructed in this way, and one of the metal yokes 4.4 of the shaft 1 is connected to the driving side and the other to the driven side, and the shaft 1 rotates as a unit and rotates from the driving side to the driven side. Transmits rotational power to the driven side.

Since the shaft 1 is used as the inner and outer peripheral surfaces of each yoke 4, that is, the bonding surfaces 4a and 4bt,
Compared to the conventional type, the bonding area can be approximately doubled, and the bonding strength can be strengthened accordingly. Therefore, it is possible to design a smaller size for the same adhesive strength, and the weight can be reduced accordingly.

In addition, by changing the physical properties of the inner and outer cylinders 2 and 3 and the auxiliary sleeve 5, it is possible to create inner and outer cylinders 2 and 3 with different physical property values.
By appropriately combining the and auxiliary sleeve 5,
The drive shaft 1 has appropriate torsional rigidity according to its application.
Properties such as bending rigidity and strength can be imparted.

Next, a method of manufacturing the drive shaft 1 described above will be explained based on FIGS. 2(a), 2(b), and 2(c). Note that FIGS. 2(a), 2(b), and 2(C) are longitudinal sectional side views showing a method for manufacturing the drive shaft 1 in the order of steps.

First, as shown in FIG. 2 (al), a plastic tape is wound around a rod-shaped mandrel 6 by a filament winding method or a tape winding method to obtain a fiber-reinforced plastic inner cylinder 2 of a predetermined length.

A shorter plastic auxiliary sleeve 5 is fitted and set in the center of the outer periphery of the obtained inner cylinder 2, and then metal yokes 4.
Fit 4. Note that the joint surface 4 between each metal yoke 4 and the inner cylinder 2
Apply adhesive to a.

Next, as shown in FIG. It is covered with 6 outer cylinders made of fiber-reinforced plastic. Incidentally, the bonding surface 4b between each metal yoke 4 and the outer cylinder 6 is also coated with adhesive in the same manner as described above.

Then, the parts shown in Fig. 2 (C1) are heated together in a heating furnace to harden the inner and outer cylinders 2.6% auxiliary sleeve 5 and adhesive, and each member is joined and integrated to finally form the drive shaft. Get 1.

In the above, the filament winding method or tape winding method is used to form the inner and outer cylinders 2 and 6, and the inner and outer cylinders 2 and 3, the auxiliary sleeve 5 and the metal yoke 4.4t-adhesive After joining, the entire assembly is heated and hardened in a heating furnace, thereby making it possible to join and integrate each component, which eliminates variations in product precision and improves productivity. .

As is clear from the above description, according to the present invention, a polymetallic yoke is fitted between both ends of the fiber-reinforced plastic inner cylinder and the crab-heavy cylinder, and these members are bonded and integrated to form a driving shirt (1 configuration). Therefore, it is possible to increase the adhesive strength by increasing the adhesive area of the shaft, and by appropriately changing the physical properties of the inner and outer cylinders, it is possible to impart appropriate characteristics to the shaft according to its use. .

Further, according to the present invention, a plastic tape is wound around a rod-shaped mandrel to obtain a fiber-reinforced plastic inner cylinder of a predetermined length, and a metal yoke is fitted to both ends of the inner cylinder via an adhesive, A plastic tape is wrapped around the outer circumference of these metal yokes via an adhesive, the metal yoke is covered with a fiber-reinforced plastic outer cylinder, and the resulting material is heated and hardened in a heating furnace to join together. Because we made it so that
The driving shirt truck can be manufactured with high precision and rationally.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a vertical cross-sectional side view of a driving shaft according to the present invention, and FIG. 2 is a side view of a driving shaft according to the present invention.
fb) and (C) are longitudinal sectional side views showing the manufacturing method of the same shaft in the order of steps. In the drawings, 2 is an inner cylinder, 611-i is an outer cylinder, 4 is a metal yoke, 5 is an auxiliary sleeve, and 6 is a mandrel. Patent applicant: Honda Motor Co., Ltd. Agent: Patent attorney Yo Shimoda Patent attorney: Kunihiko Ohashi

Claims (4)

[Claims] (1) A drive shaft characterized in that it is constructed by fitting a metal yoke from both ends between a fiber-reinforced plastic inner cylinder and a crab-heavy cylinder, and bonding and integrating these members. (2) The drive shaft as set forth in paragraph 1 of the patent specification, characterized in that a plastic auxiliary sleeve is entirely interposed between the two metal yokes and between the two metal yokes. (3) A plastic tape is wound around a rod-shaped mandrel to obtain a fiber-reinforced plastic inner cylinder of a predetermined length, and a metal yoke is fitted to both ends of the inner cylinder with an adhesive. A plastic tape is wrapped around the outer periphery of the metal yoke via an adhesive, the metal yoke is covered with a fiber-reinforced plastic outer cylinder, and the resulting product is heated and cured in a heating furnace to be integrated. A method of manufacturing a drive shaft, characterized in that: (4) After the inner cylinder is molded, a plastic auxiliary sleeve is fitted to the outer periphery of the inner cylinder, and then a metal yoke is fitted to both ends of the inner cylinder via an adhesive. 3. The method for manufacturing a drive shaft according to item 3.