JP3206190B2 - Center member reinforce structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a center member which is mounted in the front-rear direction of a vehicle body and has an engine mounted on an upper portion thereof. And a center member having a reinforcement structure.

[0002]

2. Description of the Related Art As described in Japanese Utility Model Application Laid-Open No. 60-1622, for example, a center member of a vehicle has a U-shaped center member having a vertical cross section which passes below the engine. And extend in the vehicle longitudinal direction. In order to reinforce the center member main body, as shown in FIG.
A plate-like reinforce member 6 long in the front-rear direction of the vehicle body is attached so as to cover the entire lower end opening.

An engine is elastically supported on the upper part of the center member main body 1 via an engine mount member 5. A jack-up bracket 20 projecting downward is bolted to the jack-up point on the front lower surface of the reinforce member 6.

[0004]

In the center member as described above, an engine mount member 5 for elastically supporting the engine is mounted on the upper portion of the center member main body 1, and the upper portion of the center member is provided with an engine mount member. Since the load is input, the rigidity of the upper portion of the center member main body 1 may be insufficient, and inconvenience such as dent may occur.

[0005] For this reason, conventionally, as shown in FIG. 7, the mounting position of the engine mount member 5, which is the engine mounting position of the center member main body 1, is set along the inner surface of the upper portion of the center member main body 1. It is necessary to provide a reinforcing plate 21 having an engageable shape separately from the above-mentioned reinforcement member 6. Also, with the reinforce member 6, the center member has a closed cross-sectional shape by covering the entire open end of the center member main body 1, and the jack-up bracket 20 is provided separately from the reinforce member 6. Since the structure is bolted to the reinforcement member 6, there are many components constituting the center member, and thus there is a problem that the cost increases and the weight increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce the number of components and reduce the weight of the center member while securing the rigidity required of the center member. I have.

[0007]

In order to achieve the above object, according to the present invention, a center member has a reinforcement structure,
To the center member body longitudinal sectional inverted U-shape which opens downward, the reinforcement structure of the center member is mounted a plate-like reinforcement member from below, to the reinforcement member, the portion of the reinforcement member A jack-up protrusion formed so as to protrude downward, and extends vertically or almost vertically inside the center member main body toward an engine mount position in the center member main body. d which is fixed to the inner surface
And an engine mount position reinforcing portion.

[0008]

[Function] By forming a convex portion projecting downward at the jack-up point position of the plate-like reinforcement member, a jack-up bracket is prepared separately from the reinforcement member as in the conventional case. This eliminates the need to attach the bracket to the reinforce member.

A downward load is applied by the engine to the engine mount position in the center member main body, and the load is transmitted to the vertical wall of the center member main body by the reinforcing portion of the reinforcement member receiving an in-plane force. Therefore, the engine mount position is reinforced. As described above, the jack-up point is secured and the engine mount position is reinforced by one reinforce member.

By providing the reinforcing portion as described above, the reinforcement does not necessarily cover the entire lower end opening of the center member main body, and the center member may have an open sectional structure.

[0011]

An embodiment of the present invention will be described with reference to the drawings.
First, as shown in FIG. 1, a center member body 1 having an inverted U-shape in vertical section extends in the front-rear direction of the vehicle body, and its front end 1a and rear end 1b are respectively connected to the vehicle body side member 2. It is elastically supported.

A flange 1c is formed at the lower end of the center member main body 1 so as to protrude laterally. On the front and rear sides of the upper part of the center member body 1, two rods 3 made of a pipe or the like are attached so as to horizontally pass through a pair of vertical walls 1d opposed in the vehicle width direction. , An engine mount position in the center member main body 1.

An engine mount member 5 is mounted on the two rods 3, and the engine 4 is elastically supported by the center member main body 1 via the engine mount member 5. A reinforcement member 6 is attached to the center member main body 1 from below and reinforced.

The reinforcement member 6 is shown in FIGS.
The center part 7 of the vehicle body in the front-rear direction is almost the same shape as the upper part of the center member main body 1 and has a width capable of contacting the flange 1c of the center member main body 1. And is fixed so as to abut against the flange 1c from below. At the jack-up point position in the central portion 7, a convex portion 7a projecting downward is formed, and a drain hole 7b is opened in the central portion 7. The portion 7c protrudes upward to increase the rigidity of the convex portion 7a and its vicinity.

An overhang 7d for attaching an undercover is formed at each side end of the central portion 7, and a weld nut 9 for attaching the undercover is fixed to each overhang 7d. Have been. And the overhang portion 7d
Then, the under cover 8 is bolted via the weld nut 9.

The front end 10 of the reinforcement member 6
Has an outer surface shape extending forward and upward from the central portion 7 and capable of engaging with the upper inner surface of the center member main body 1, the outer surface of which is flush with the inner surface of the center member, and A mounting hole 10b is formed coaxially with the mounting hole 1e formed in the main body 1.

The center member main body 1 and the front end 1a of the center member main body 1 are bolted so as to penetrate through the mounting holes 1e and 10b of the front end 1a of the reinforce. , The surface rigidity of the front end portion 1b of the center member main body 1 is improved as compared with the related art, and the attachment of the reinforcement member 6 to the center member main body 1 is strengthened.

The rear end 11 of the reinforcement member 6 is also provided.
Extends substantially vertically toward the rod body 3 while abutting the end faces in the width direction on the inner surfaces of the pair of vertical walls 1d of the center member main body 1 to form a reinforcing portion. The tip portion 11a of the reinforcing portion 11 is formed in a shape that can be engaged with the outer peripheral surface of the rod 3 so that the tip portion 11a abuts on the outer periphery of the rod 3 and the width direction of the reinforcing portion 11 The end face is fixed to the inner surface of the vertical wall 1d of the center member main body 1.

At this time, a downward load F from the engine 4 is input to the center member via the rod 3, but the load F is applied to the reinforcing portion 11 by an in-plane force as shown in FIG. And is transmitted to the vertical wall 1d via the reinforcing portion 11. In the above-described embodiment, the structure in which the engine mount member 5 is supported by the rod 3 penetrating the upper portion of the center member main body 1 has been described. In the case where a structure for supporting the engine mount member 5 on the upper surface is adopted, the reinforcing portion 11 is attached to the center member main body 1.
The load F input from the engine 4 is applied to the upper portion of the center member main body 1 so that the load F is reinforced by a reinforcing portion. 11 is sufficient.

As described above, in the reinforcement structure according to the present embodiment, by forming a single plate member into the above-described shape by bending or the like, a single reinforcement member 6 can be formed. In addition, reinforcement of a portion to which a load is input from the engine 4, securing of a convex portion 7 a for jack-up and an under cover attaching portion 7 d, front end portion 1 of the center member main body 1
Since the four functions of improving the rigidity of a can be provided, the number of parts constituting the center member can be reduced and the weight can be reduced while securing a predetermined rigidity.

In the above embodiment, the reinforce member 6 is attached only to the front end 1d of the center member main body 1. However, a reinforce member having the same structure is also provided on the rear end 1b side of the center member main body 1. It may be mounted to reinforce the engine mount position on the rear end side. Further, in the above embodiment, the center portion of the center member in the longitudinal direction has an open sectional structure. However, since the jack-up point is located on the front end side, the center member main body 1 with respect to the input from the jack-up point is provided. Is secured.

[0022]

As described above, in the center member reinforce structure of the present invention, while maintaining a predetermined rigidity with respect to the center member, the number of components is reduced and the weight is reduced as compared with the related art. be able to.

[Brief description of the drawings]

FIG. 1 is a side view showing a center member according to an embodiment of the present invention.

FIG. 2 is a side view showing a reinforcement member according to the embodiment of the present invention.

FIG. 3 is a plan view illustrating a reinforce member according to an embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA in FIG. 3;

FIG. 5 is a diagram showing load support by an engine mount in the embodiment according to the present invention.

FIG. 6 is a side view showing a conventional center member.

FIG. 7 is a view showing a conventional engine mount position.

[Explanation of symbols]

 Reference Signs List 1 Center member main body 3 Rod body (engine mounting position) 5 Engine mount member 6 Reinforce member 7a Convex part 7d Overhang part (under cover attachment part) 11 Reinforcing part

Claims (1)

(57) [Claims] To 1. A center member body longitudinal sectional inverted U-shape which opens downward, the reinforcement structure of the center member is mounted a plate-like reinforcement member from below, to the reinforcement member, the rain Four
Graphics and projections of the part for molding to become Ja <br/> Kkiappu that so as to protrude downward of the member, vertical or extends substantially vertically within said center member body toward the engine mount position in the center member body An engine mount position reinforcing portion fixed to the inner surface of the center member main body, and a reinforcement structure for the center member.