JPH03159881A - Car frame - Google Patents

Abstract

PURPOSE:To enhance the bonding strength and prevent damage of electric erosion, etc., by furnishing the frame of a car with a cross member and a side rail, providing the latter at its inner surface a rib having grooves whose insides are each enlarged in longitudinal direction, and detaining ridges on the cross member side with these grooves. CONSTITUTION:A rib 3 is formed stretching in the longitudinal direction of a side rail 1 and is provided with grooves 4 whose insides are each enlarged relative to the opening. That end face of a cross member 6 to be coupled with the side rail 1 is provided with ridges 5, which are to detain with the grooves 4. The ridges 5 are fitted in the grooves 4 and adhered fast. This constitution enhances the bond rigidity, prevent stress concentration, and precludes rivet cracking and electric erosion.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes a side rail and a cross member,
This invention relates to a frame for a vehicle that has increased rigidity and mounting performance, and that prevents inconveniences such as electrolytic corrosion and cracking of rivets at the joints between side rails and cross members.

[Conventional technology]

Conventionally, in vehicle frames, side rails a and cross members b have been coupled with rivets C or bolts (not shown), as shown in FIG. 8, for example.

[Problem to be solved by the invention]

As mentioned above, when the side rail and cross member are connected with rivets or bolts on the side rail flanges or web surfaces, there are problems with rivet cracking and electrolytic corrosion, and the contact area of the joint is relatively small. , the bonding rigidity was low, and there was also the problem of stress concentration.

[Means to solve the problem]

In this invention, in a vehicle frame including a side rail and a cross member, a concave groove is provided on the inner surface of the side rail, extending in the longitudinal direction of the side rail, and having a cross-sectional shape enlarged inside relative to the opening. Protruding ribs are provided, and on the other hand, a protrusion with a cross-sectional shape that matches the groove -2- is formed on the end face of the cross member, and the protrusion is fitted into the groove and then bonded to each other with an adhesive. The present invention proposes a vehicle frame characterized by the following features.

[Effect]

In the above structure of this invention. The protrusion formed on the end face of the cross member is fitted into the groove protruding from the inner surface of the side rail. After positioning the cross member with respect to the side rail, adhesive is filled between the groove and the protrusion to firmly connect the two.

〔Example〕

Next, various embodiments of the present invention will be explained in detail with reference to FIGS. 1 to 7.

Fig. 1 shows a fragment of the side rail 1 made of extruded material, and in this figure, ribs 3 are provided on the inner surface 2 of the frame main body 1a, which has an approximately U-shaped outline, extending in the longitudinal direction of the frame 1. A concave groove l is provided in the rib 3 and has a cross section (circular cross section in this figure) whose inside is enlarged with respect to the opening.
] The number of the second grooves 4 is two in this figure, but this is determined depending on the size of the vehicle.

As shown in FIG. 2, a cross member 6 having a protrusion 5 having a cross-sectional shape matching that of the groove 4 is fitted into the groove l1, thereby forming the side rail. 1, and an adhesive 7 is filled between the grooves 4 and the protrusions 5 to join them together.
The details will be explained below.

The cross member 6 may have the protrusion 5 integrally formed on the outer surface of the end member 6a of the cross member 6, as shown in FIG. 3, or as shown in FIG. A configuration in which a member 8 having the protrusion 5 is bonded to the cross member 6 via its bonding surface 9 with adhesive, for example, may be considered.

As a mode of bonding the side rail l and the cross member 6 with adhesive, as shown in FIG. In order to improve the coverage of the adhesive 7 at this time, as shown in FIG. Receiving groove 1 that matches adhesive filling hole 10
1 and. The receiving groove 11 is formed vertically in a grid pattern, and an adhesive filling groove 12 is recessed therein.

In order to prevent the adhesive from leaking out laterally from the gap between the concave groove 4 and the protrusion 5, a rubber seal 13 that exactly fits the gap is formed on the periphery, as shown in FIG. If the plate l4 is fixed to the side surface of the protrusion 5 through the mounting hole l5 with bolts, adhesive, welding, etc., it can be prevented from protruding. Suitable for preventing adhesive deterioration due to moisture absorption.

〔Effect of the invention〕

Since the vehicle frame of the present invention has the above-described structure,
There are 5--4 effects that have the following effects. In other words. l) The contact area of the joint between the side rail and the crossmenh is wider than that of conventional rivet or bolt joints, which improves joint rigidity and reduces stress concentration, reducing frame torsion. Improved rigidity. The service life of the joint can be expected to be extended. 2) Since the joint is a contact joint, the joint can be bonded with adhesive, preventing electrolytic corrosion and there is no risk of cracking of the rivets as in the case of riveting.

3) It has a structure in which the concave groove and the convex part engage with each other as a joint. Even if the adhesive peels off, the two bonding materials will not separate and are safe.6 4) Ribs for forming concave grooves are provided on the inner surface of the side rail, making it safer than conventional side rails with a simple channel cross section. High bending and torsional rigidity.

5) Since there are no protruding parts on the outer surface or flange of the side rail, mounting efficiency is improved.

[Brief explanation of the drawing]

-6 Figure 1 is a perspective view of a part of the side rail according to the present invention, Figure 2 is a cross-sectional view showing how the side rail and cross member are connected, and Figures 3 and 4 are two types of cross members. 5(a) is a diagram showing a part of the outer surface of the side rail, FIG. 5(b) is a sectional view taken along line A-A in FIG. 5(a), and FIG. 6 is a diagram showing a part of the outer surface of the side rail. A perspective view showing the structure of a receiving groove and an adhesive filling groove in a protrusion formed on the end face of a cross member, Fig. 7 is a view showing an example of an adhesive seal, and Fig. 8 is a conventional example. FIG. In the figure, l side rail 3 rib 4 concave groove 5 protrusion 6 cross member 7 adhesive. Figure 1 / 2 5 Figure 6 Figure 2 Figure 5 (a) (b) 1 A'' Figure 7 Figure 13 Figure 6 Figure 8

Claims (1)

[Claims] (1) In a vehicle frame equipped with a side rail and a cross member, a rib is protruded on the inner surface of the side rail and has a groove extending in the longitudinal direction of the side rail and having a cross-sectional shape whose inside is enlarged relative to the opening. A vehicle characterized in that a protrusion having a cross-sectional shape that matches the groove is formed on an end face of the cross member, and the protrusion is fitted into the groove and then bonded to each other with an adhesive. frame.