JPH06263056A - Reinforcing structure for center member - Google Patents

Abstract

PURPOSE:To reduce weight of a center member by reducing part items while securing rigidity required for the center member. CONSTITUTION:A reinforcement member 6 is installed on a center member body 1 from the under side. A projecting part 7a projecting downward is formed in the central part of the reinforcement member 6. Weld nuts 9 are fixed to respective overhang parts 7d formed in the side end part of the central part 7. The front end part 10 of the reinforcement member 6 is extended forward and upward from the central part 7, and has an outside surface shape capable of engaging with an upper part inside surface of the center member body 1, and is flushed with an inside surface of a center member. The rear end part 11 of the reinforcement member 6 is extended almost vertically toward a bar body 3, and forms a reinforcing part.

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 installed in the front-rear direction of a vehicle body and mounts an engine on the upper part thereof, and more particularly to the shape of a reinforcement member for reinforcing the center member main body and its mounting structure. The present invention relates to a reinforcement structure of a center member having.

[0002]

2. Description of the Related Art In a center member of a vehicle, a center member body having an inverted U-shaped vertical section passes under an engine as described in Japanese Utility Model Laid-Open No. 60-1622. And is arranged so as to extend in the front-rear direction of the vehicle body. Then, in order to reinforce the center member main body, as shown in FIG.
A plate-shaped reinforcement member 6 which is 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 above the center member body 1 via an engine mount member 5. A jack-up bracket 20 having a downwardly projecting shape is bolted to a jack-up point on the front lower surface of the reinforcement member 6.

[0004]

In the center member as described above, the engine mount member 5 for elastically supporting the engine is attached to the upper part of the center member main body 1, and the engine mount member 5 is attached to the upper part of the center member from the engine. Since the load is input, if it is left as it is, the rigidity of the upper part of the center member main body 1 is insufficient, and there is a possibility that inconvenience such as dent may occur.

For this reason, in the prior art, as shown in FIG. 7, with respect to the mounting position of the engine mount member 5, which is the engine mounting position in the center member main body 1, as shown in FIG. The reinforcing plate 21 having an engageable shape needs to be provided separately from the reinforcement member 6. Also, in the case of the reinforcement member 6 as well, the center member main body 1 is entirely covered with the opening end portion to have a closed cross-sectional shape, and in addition to the reinforcement member 6, the jack-up bracket 20 is provided. Since the structure is bolted to the reinforcement member 6, there are many parts constituting the center member, which causes a problem of high cost and heavy weight.

The present invention has been made in view of the above problems, and aims to reduce the weight of the center member by reducing the number of components while ensuring the rigidity required for the center member. There is.

[0007]

In order to achieve the above object, the present invention provides a center member reinforcement structure,
In a center member reinforcement structure in which a plate-shaped reinforcement member is attached from below to a center member main body having an inverted U-shaped vertical cross-section that opens downward, the reinforcement member for jack-up projecting downward is attached to the reinforcement member. The present invention is characterized in that a convex portion and a reinforcing portion that extends vertically or almost vertically in the center member main body toward the engine mount position in the center member main body and is fixed to the inner surface of the center member main body are provided.

[0008]

[Function] A jack-up bracket is prepared separately from the reinforcement member by forming a convex portion projecting downward at the jack-up point position in the plate-shaped reinforcement member as in the conventional case. Then, the work of attaching the bracket to the reinforcement member becomes unnecessary.

Further, a downward load is applied to the engine mount position of the center member main body by the engine, and the reinforcing portion of the reinforcement member receives the load by in-plane force and transmits it to the vertical wall of the center member main body. Therefore, the engine mount position is reinforced. In this way, a single reinforcement member secures the jack-up point and reinforces the engine mount position.

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

[0011]

Embodiments of the present invention will be described with reference to the drawings.
First, the configuration will be described. As shown in FIG. 1, a center member main body 1 having an inverted U-shaped vertical cross section extends in the vehicle body front-rear direction, and a front end portion 1a and a rear end portion 1b thereof are respectively attached to a vehicle body side member 2. It is elastically supported.

A flange 1c is formed at the lower end of the center member body 1 so as to project laterally. Two rods 3 each made of a pipe or the like are attached to the front and rear sides of the upper part of the center member main body 1 so as to horizontally penetrate a pair of vertical walls 1d facing each other in the vehicle width direction. The engine mount position in the center member main body 1 is formed.

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

The reinforcement member 6 is shown in FIGS.
The center portion 7 of the vehicle body in the front-rear direction has substantially the same shape as the upper portion of the center member body 1 and has a width capable of contacting the flange 1c of the center member body 1. Is fixed so as to come into contact with the flange 1c from below. A convex portion 7a protruding downward is formed at a jack-up point position in the central portion 7, and a water draining 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.

Further, each of the side portions of the central portion 7 is formed with an extension portion 7d for attaching an under cover, and a weld nut 9 for attaching the under cover is fixed to each extension portion 7d. Has been done. And the overhanging portion 7d
Then, the undercover 8 is bolted through the weld nut 9.

Further, the front end portion 10 of the reinforcement member 6
Has an outer surface shape that extends forward and upward from the central portion 7 and is engageable with the upper inner surface of the center member main body 1. The outer surface of the outer surface is aligned with the inner surface of the center member and A mounting hole 10b is provided coaxially with the mounting hole 1e provided in the main body 1.

Then, the center member body 1 and the front end portion 1a of the reinforcement member are bolted so as to penetrate through both the mounting holes 1e and 10b of the front end portion 1a of the reinforcement member, so that the front end portion 1a of the center member body 1 is attached to the vehicle body side member 2. By being fixed to the center member main body 1, the surface rigidity of the front end portion 1b of the center member main body 1 is improved more than before, and the reinforcement member 6 is firmly attached to the center member main body 1.

Further, the rear end portion 11 of the reinforcement member 6
While extending the widthwise end faces against the inner surfaces of the pair of vertical walls 1d in the center member main body 1, each extends substantially vertically toward the rod body 3 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 body 3, and the tip portion 11a is brought into contact with the outer periphery of the rod body 3 and the width direction of the reinforcing portion 11 is The end surface is fixed to the inner surface of the vertical wall 1d of the center member body 1.

At this time, the downward load F from the engine 4 is input to the center member via the rod body 3. However, as shown in FIG. Is transmitted to and supported by the vertical wall 1d through the reinforcing portion 11. In the above-described embodiment, an example in which the engine mount member 5 is supported by the rod 3 that penetrates the upper portion of the center member body 1 has been described. In the case of adopting a structure in which the engine mount member 5 is supported on the upper surface, the reinforcing portion 11 is provided in
The upper end of the center member main body 1 is extended to the upper inner surface of the reinforcing member so that the tip portion thereof is engaged with the inner surface of the upper portion by a predetermined amount. It may be supported by 11.

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

In the above embodiment, the reinforcement member 6 is attached only to the front end portion 1d of the center member main body 1, but a reinforcement member having a similar structure is also attached to the rear end portion 1b of the center member main body 1. It may be attached to reinforce the engine mount position on the rear end side. Further, in the above-described embodiment, the central portion in the longitudinal direction of the center member has an open cross-section structure, but since the jack-up point is located on the front end side, the center member main body 1 for input from the jack-up point is located. The rigidity of is secured.

[0022]

As described above, in the reinforcement structure of the center member of the present invention, the center member is secured with a predetermined rigidity, and the number of components and the weight thereof are reduced as compared with the prior art. be able to.

[Brief description of drawings]

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

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

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

4 is a cross-sectional view taken along the line AA in FIG.

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

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

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

[Explanation of symbols]

 1 Center Member Main Body 3 Rod (Engine Mount Position) 5 Engine Mount Member 6 Reinforcement Member 7a Projection 7d Overhang (Undercover Attachment) 11 Reinforcement

Claims (1)

[Claims] 1. A center member reinforcement structure in which a plate-shaped reinforcement member is attached from below to a center member main body having an inverted U-shaped vertical cross-section that is open downward, and projects downward to the reinforcement member. And a reinforcing portion that extends vertically or almost vertically in the center member body toward the engine mount position in the center member body and is fixed to the inner surface of the center member body. Reinforce structure of center member.