JPH0745383Y2 - Engine mounting structure for vehicle body consisting of sandwich structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an engine mounting structure for a vehicle body, which is composed of a sandwich structure in which both surfaces of a core layer are covered with an outer skin layer.

[Conventional technology]

In recent years, for the purpose of improving the productivity by reducing the weight of the vehicle and reducing the number of parts, it has been proposed to use a composite structure such as a reinforced plastic in a vehicle body, and some have been put to practical use.

Such a composite structure is generally a so-called sandwich structure in which a core material is coated with outer layers from both sides, and a foamed plastic body is used as the core material (Japanese Patent Publication No.
-36329, JP-B-55-43912, JP-B-63-30276, U.S. Pat.No. 4,559,274, U.S. Pat. Kaisho 57-1
No. 14774, No. 62-174935, No. 62-174978, etc.)
Have been proposed. It has also been proposed to use a structure in which a core part of the sandwich structure is partially hollow in a vehicle body (Japanese Utility Model Publication No. 62-166136, etc.).

[Problems to be solved by the device]

However, in such a sandwich structure, if it is attempted to fix a component directly to the core material by using a screw or the like, it is difficult to fix the screw, and there is a problem in strength of component attachment.

In particular, the engine is not only heavy but also a vibration source, so to attach it to the vehicle body of the sandwich structure, fixing it with the above screws or simply attaching it to the surface of the outer skin layer by welding or adhesion will increase the strength. There is a shortage problem.

Therefore, an object of the present invention is to provide a structure for mounting an engine with sufficient strength on a vehicle body of a sandwich structure including an outer skin layer and a core, and particularly to provide an engine mounting bracket and an engine mounting structure. .

[Means for Solving the Problems]

As a result of earnest research in view of the above problems, the present inventor formed a tapered recess in the engine mounting portion of the vehicle body of the sandwich structure, and provided a protruding portion below which the engine mounting bracket is locked, By fitting an engine mounting bracket having a convex portion having a tapered shape complementary to the concave portion and having a bent portion engaging with the protruding portion to the engine mounting portion of the sandwich structure with an adhesive and a screw, The inventors have found that a strong engine mounting structure can be obtained by smoothly transmitting the load of the engine to the large area of the entire outer skin layer of the sandwich structure, thereby distributing the stress, and conceived the present invention.

That is, an engine mounting portion of a vehicle body having a sandwich structure in which both surfaces of a core layer are covered with a plastic skin layer, and the outer skin layer on the engine side has a tapered side surface and a flat bottom surface. -Shaped recess and a protrusion that locks the engine mounting metal fitting are formed below the recess, and another recess is formed in the outer skin layer on the back side at a position corresponding to the recess. An engine mounting metal fitting of the present invention, which is fixed to an engine mounting portion to which a bottom surface is joined, has a shape that covers the tapered concave portion and the protruding portion of the engine side outer skin layer, and has a lower end of the protruding portion. The first metal fitting piece having a bent portion that engages with the stopper portion and the second metal fitting piece having a shape that covers the recess of the outer skin layer, and the first metal fitting piece and the second metal fitting piece are tapered. Of the concave part While it is fastened by bolts in the the first metal fitting member, characterized in that the pair of side plates for supporting the engine is extended.

Further, the structure for mounting the engine to the engine mounting portion of the vehicle body of the sandwich structure of the present invention by the above-mentioned metal fitting has a shape that covers the tapered concave portion and the protruding portion of the outer skin layer on the engine side, and A first metal fitting piece having a bent portion that engages with the lower end of the protrusion and a pair of side plates that supports the engine is fixed to the engine-side outer skin layer, and the concave portion of the outer skin layer on the back side has this A second metal fitting piece having a shape covering the recess is fixed, and the first metal fitting piece and the second metal fitting piece are fastened with a bolt at the position of the tapered recess.

[Examples and functions]

FIG. 1 is a partially cutaway perspective view showing an engine mounting portion of a vehicle body having a sandwich structure according to an embodiment of the present invention, and FIG. 2 is a schematic view of the vicinity of the engine in a vehicle of the engine mounting portion. Indicates the position.

First, as can be seen from FIG. 2, the engine mounting portion 4 shown in FIG. 1 is provided at a position for laterally supporting the engine 11 installed laterally in the front portion of the vehicle, and that portion is formed of a sandwich structure. It is on the front frame 10a (left side in this embodiment). As can be seen from FIG. 1, the sandwich structure forming this front frame is composed of a pair of outer skin layers 1 and 1 provided on both sides and a foam layer 2 as a core material. The foam layer 2 is entirely covered. At the ends of the sandwich structure, the outer skin layers 1 and 1 on both sides are joined to form a flange portion 3.

The engine mounting portion 4 has a tapered concave portion 5 and a protrusion portion 8 that serves as a locking portion for the engine mounting metal fitting. The tapered concave portion 5 is composed of a flat bottom surface 5a and flared side surfaces 5b, 5c, 5d and 5e surrounding the flat bottom surface 5a. Another tapered concave portion 9 is formed on the back side of the concave portion 5, and both outer skin layers 1, 1 are formed on the bottom surface portion 5a.
Are joined. In addition, one or more analogs 6 through which bolts pass are provided on the bottom surface portion 5a.

Below the recess 5, a protrusion 8 for locking the engine mounting bracket is formed. Further, a smooth concave curved surface 7 is formed between the protrusion 8 and the concave portion 5.

FIG. 3 is a partially cutaway perspective view showing a state in which an engine mounting bracket is fixed to the engine mounting portion shown in FIG.
The drawing is a sectional view taken along the line AA of FIG.

The metal fittings fixed to the engine mounting portion are the first metal fitting piece on the engine side that integrally covers the concave portion 5 and the protruding portion 8, and the concave portion 9 on the back side.
The engine mounting bracket 20 shown in FIG. 3 is a first bracket member on the engine side. The first metal piece 20 has a flat bottom surface 25a and a taper-shaped downward convex portion 25 composed of expanded side surfaces 25b, 25c, 25d, and 25e formed so as to surround the flat bottom surface 25a. The portion 25 has a shape complementary to the recess 5 shown in FIG. Further, a bolt hole 26 is provided on the bottom surface 25a at a position corresponding to the bolt hole 6 provided on the bottom surface 5a of the recess 5.

Further, as is apparent from FIG. 4, the first metal fitting piece 20 has a bent portion 31 at the lower end thereof, which is engaged with the protruding portion 8 of the engine mounting portion.

Further, the first metal piece 20 has a pair of side plates for supporting the engine.
21 and 21 'extend, and each side plate 21, 21' is provided with a hole 28 into which the end portion of the engine is fitted. Flange portions 29a and 2a are provided around the pair of side plates 21 and 21 'and the above convex portion.
9b is formed continuously.

On the other hand, a second metal fitting piece 30 having a complementary shape is fixed to the tapered concave portion 9 formed in the outer skin layer on the back side as viewed from the engine side.
The outer skin layers 1 and 1 are sandwiched between 30 and screwed by bolts 32.

As is apparent from FIG. 4, the first metal piece 20 is a flange portion.
29a, the tapered downward convex portion 25, and the smooth concave curved surface portion 2
The entire surface of 7 and the bent portion 31 is in close contact with the skin layer 1 of the sandwich structure. Further, as shown in FIG. 3, the flange portion 29b is also in close contact with the outer skin layer. In this state, the first metal piece
20 is firmly fixed to the vehicle body composed of a sandwich structure with an adhesive.

As shown in Fig. 4, the engine is installed in the holes on the side plate 21.
28 by supporting one end 35 of the engine block through a rubber disc 34.

The load of the attached engine is smoothly transmitted to the outer skin layer 1 to which it is fixed via the first metal piece 20. The first metal piece 20 is a tapered recess 5 formed in the vehicle body.
Since the protrusion 8 and the curved surface portion 7 are firmly fixed to each other, even if a load is applied in any direction, the load can be received by either surface.

That is, the downward load of the engine is received by the concave curved surface 27 of the first fitting piece 20 and the flange portions 29a and 29b, and the bending portion 31 receives the upward force caused by the vibration of the engine or the vibration of the vehicle body. Further, not only these surfaces but also the side surface of the concave portion and the shearing surface of the adhesive on the side plate 21 supporting the engine are subjected to the load.

Further, even when a load is applied in the left-right direction or the twisting direction, the side surface surrounding the recess bottom surface 5a, the pair of side plates 21 and the flange portion.
Since the load acts as a pressing force on any one of the surfaces of 29b, it is sufficiently supported at that portion. Further, the bent portion 31 also works effectively against the torsion load.

As described above, the load of the engine can be sufficiently supported only by the adhesion between the engine mounting portion 4 and the first metal fitting piece 20, but as a reinforcement and a fail-safe, the recessed portion will not fall off if the adhesive portion should peel off. A bolt 32 is attached to the bottom surface portion 5a of the. At this time, the second metal fitting piece 30 covering the recess 9 is attached to the concave portion 9, and the bolting force is uniformly applied as a pressing force to the sandwich structure by the entire surface of the second metal fitting piece 30 to provide a solid engine mounting portion. Is formed.

The outer skin layers 1 and 1 of the sandwich structure can be formed of various kinds of plastics, but fiber-reinforced plastics are preferable, because they have good moldability and can be formed into a structure having a complicated shape. It is preferable to use a thermoplastic resin as the matrix material. Particularly, carbon fiber reinforced nylon is preferable from the viewpoints of moldability, strength and durability. The core layer 2 may be a foamed plastic body, a honeycomb core, or a hollow shape, but from the viewpoint of moldability and strength, it is preferably formed of a foamed plastic body, particularly a polyurethane foam body.

Although the engine mounting structure of the present invention has been described with reference to the accompanying drawings, the present invention is not limited to this and various modifications can be made without departing from the spirit of the present invention. For example, instead of providing the recesses in the outer skin layers on both sides, it is possible to form the engine mounting portion in which one of the outer skin layers remains flat.
The shape of the concave portion of the outer skin layer may be a curved surface as long as it has a tapered side surface, and can be various shapes depending on the purpose.

[Effect of device]

As described in detail above, the engine mounting structure of the present invention forms tapered recesses and protrusions in the sandwich structure including the outer skin layer and the core, which is the vehicle body, and complements the recesses and protrusions. By bonding the shaped engine mounting bracket to the engine mounting portion, the load of the engine can be smoothly transmitted to the sandwich structure.

Also, the engine mounting metal fittings are in close contact with the tapered recesses of the sandwich structure without any clearance, so
The engine mounting structure is robust against forces in all directions of torsion.

[Brief description of drawings]

1 is a partially cutaway perspective view showing an engine mounting portion of a vehicle body according to an embodiment of the present invention, and FIG. 2 is a partial schematic view of a vehicle showing a position of the engine mounting portion of FIG. FIG. 3 is a partially cutaway perspective view showing a state in which an engine mounting bracket is fixed to the engine mounting portion shown in FIG. 1, and FIG. 4 is a sectional view taken along the line AA of FIG. 1 ... Outer skin layer 2 ... Core material (foam layer) 3 ... Flange portion 4 ... Engine mounting portion 5, 9 ... Recess 5a ... Recess bottom surface 5b, 5c, 5d, 5e ... Recess side surface 6, 26 …… Bolt hole 7 …… Concave curved surface 8 …… Projection 10 …… Vehicle body (front panel) 11 …… Engine 20 …… Engine mounting first metal fitting 21 …… Side plate 25 …… First metal fitting Downward convex part 29 …… First metal flange 30 …… Engine second metal fitting 31 …… Bend 32 …… Bolt 35 …… Engine end

Claims (2)

[Scope of utility model registration request] 1. An engine mounting portion of a vehicle body comprising a sandwich structure in which both sides of a core layer are covered with a plastic skin layer, wherein the engine side skin layer has an expanded side surface and a flat bottom surface. A tapered concave portion having a projection portion for locking the engine mounting metal fitting is formed therebelow, and another concave portion is formed in the outer skin layer at a position corresponding to the concave portion, In an engine mounting bracket fixed to an engine mounting portion where the bottom surfaces of both recesses are joined, the engine mounting metal fitting has a shape that covers the tapered recessed portion and the protruding portion of the outer skin layer on the engine side, and has a lower end of the protruding portion. The first metal fitting piece has a bent portion that engages with the stopper, and the second metal fitting piece has a shape that covers the concave portion of the outer skin layer, and the first metal fitting piece and the second metal fitting piece are tapered. Position of the recess While being fastened by Oite bolt, wherein the first metal piece engine mounting bracket, wherein a pair of side plates for supporting the engine is extended. 2. A structure for mounting an engine on an engine mounting portion by means of the metal fitting according to claim 1, which has a shape for covering the tapered concave portion and the protruding portion of an outer skin layer on the engine side, and has a lower end of the protruding portion. A first metal piece having a bent portion that engages with and a pair of side plates that support the engine, is fixed to the outer skin layer on the engine side, and the recess of the outer skin layer on the back side has a shape that covers this recess. An engine mounting structure characterized in that the second metal fitting piece having the above is fixed, and the first metal fitting piece and the second metal fitting piece are fastened by bolts at the position of the tapered recess.