JP3133098B2 - Car silencer 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 silencer structure for a motor vehicle, and more particularly to a structure for restricting a forward movement of a silencer in a rear-end collision of a motor vehicle.

[0002]

2. Description of the Related Art Generally, a silencer constituting a part of an exhaust system is disposed behind a vehicle body bottom. Since the silencer is usually formed of a rigid body, it exerts an action of suppressing deformation of the rear portion of the vehicle body during a rear-end collision of the vehicle. When a silencer is provided only on one side of the vehicle body, a reinforcing member is provided on a vehicle body component (e.g., a rear fender) on the side opposite to the side where the silencer is provided, so that the rear of the vehicle body in a rear-end collision can be provided. To balance the deformation.

[0003] In order for the silencer to exert a deformation suppressing action at the time of a rear-end collision, it is important that the silencer does not move forward of the vehicle at the time of a rear-end collision, and is usually arranged in front of the vehicle body of the silencer. Layout components (for example, suspension cross members)
This prevents the silencer from moving forward.

[0004] However, depending on the direction of the force acting upon a rear-end collision of the vehicle, the silencer may be moved under the layout components and move forward. Then, there is a possibility that a problem that the silencer cannot sufficiently exert the rear-end deformation suppressing effect may occur.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object thereof is to surely prevent a forward movement of a silencer during a vehicle collision. It is assumed that.

[0006]

According to the first aspect of the present invention, as a means for solving the above-mentioned problems, an appropriate rigid layout component is provided at a front portion of a silencer provided behind a vehicle body bottom. At the front end of the silencer, an engagement provided at an appropriate position of the layout component to prevent the layout component of the silencer from penetrating downward and restrict the forward movement of the silencer at the time of a vehicle collision. A locking claw that engages the portion is provided.

According to a second aspect of the present invention, as a means for solving the above problems, in the silencer structure for an automobile according to the first aspect, the layout component is a suspension cross member.

[0008]

According to the first or second aspect of the present invention, the following effects can be obtained by the above means.

That is, at the time of a rear-end collision of the vehicle, the rear part of the vehicle body is deformed by the rear-end impact force, and accordingly, the silencer moves forward. At this time, the locking claws of the silencer are moved to the layout parts (for example, the suspension cross member). By engaging with the engaging portion (-), the silencer is prevented from digging down below the layout component, and further forward movement of the silencer is prevented.

[0010]

According to the first or second aspect of the present invention, an appropriate rigid layout component (for example, a suspension cross member) is provided at a front portion of a silencer provided at the rear of a vehicle body bottom. At the front end of the silencer, the layout component (for example, a suspension cross member) is positioned at an appropriate position at the front end of the silencer to prevent the layout component of the silencer from penetrating downward and restrict the forward movement of the silencer during a vehicle collision. When the silencer moves forward due to deformation of the rear part of the vehicle body during a rear-end collision of the vehicle, the locking claw of the silencer is provided with a layout component (for example, a suspension). Since the engaging portion of the cross member is engaged with the engaging portion, it is extremely simple to fix the locking claw to the front end of the silencer. By this means, forward movement of the silencer is prevented while preventing the layout components of the silencer from moving downward during a rear-end collision. There is an excellent effect that can be exhibited.

According to the second aspect of the present invention, the forward movement of the silencer at the time of a rear-end collision can be prevented by the engagement of the engaging claw fixed to the front end of the silencer and the engaging portion of the suspension cross member. There is an excellent effect that the members can be blocked and the silencer can prevent the rear-end collision deformation (that is, the shock absorbing control operation).

[0012]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. This embodiment relates to claims 1 and 2
It corresponds to the invention of the above.

As shown in FIG. 1, the vehicle silencer 1 of this embodiment is disposed obliquely outward on one side at the rear of the bottom of the vehicle body, and a suspension device 2 is provided in front of the silencer 1. A suspension cross member 3 for supporting is provided. In the case of the present embodiment, the suspension cross member 3 is a layout component disposed in front of the silencer 1.

The silencer 1 constitutes a part of an exhaust system, and is provided at a rear portion of the exhaust pipe 4.

The suspension device 2 is interposed between the suspension cross member 3 and the wheel support 5, as shown in FIGS. 1 and 3, and includes an A-type upper control arm 6, Type lower control arm 7 and toe control link 8
And

The upper control arm 6 has its two inner ends 6a, 6a swingably connected to the upper mounting seat 3a of the suspension cross member 3, and its outer end 6b is connected to the upper part of the wheel support 5. It is configured to be swingably connected to the mounting seat 5a.

The lower control arm 7 has its inner end 7a swingably connected to the lower mounting seat 3b of the suspension cross member 3 and its outer end 7b connected to the lower mounting seat 5b of the wheel support 5. It is configured to be swingably connected.

The toe control link 8 has an inner end 8a swingably connected to an upper mounting seat 9a of a support bracket 9 fixed to the suspension cross member 3, and an outer end 8b to the outer end 8b. The wheel support 5 is swingably connected to an intermediate mounting seat 5c. Reference numeral 10 denotes an oil-filled bush provided in the middle of the control link 8.

The upper control arm 6
A lower end of a shock absorber 11 whose upper end is fixed to a vehicle body-side member (for example, a suspension tower) is swingably mounted near the outer end of the shock absorber 11.

A trailing link 12 is interposed between a portion near the outer end of the lower control arm 7 and a lower outer end of the support bracket 9.
The front end of the trailing link 12 is
Is swingably connected to the lower mounting seat 9b. Sign 1
3 is the wheel support 5 and rear differential
(Not shown).

As shown in FIG. 4, a substantially L-shaped engaging claw 14 is fixed to the front end of the silencer 1 by welding. That is, in the case of the present embodiment, the locking claw 14 constitutes a locking portion for regulating the forward movement of the silencer 1.

On the other hand, the suspension cross member 3 is provided with an engaging portion 15 at a position where the locking claw 14 of the silencer 1 engages when the silencer 1 moves forward during a vehicle collision. In the case of the present embodiment, the engaging portion 15 is formed by making the vertical wall of the suspension cross member 3 slightly thin so that the locking claw 14 can easily be engaged. Without
It is also possible to use the vertical wall of the suspension cross member 3 as the engaging portion as it is.

In the drawings, reference numeral 16 denotes a side frame;
Is a floor panel, 18 is a fuel tank, and 19 is a rear wheel.

The vehicle silencer structure constructed as described above operates as follows.

At the time of a rear-end collision of the vehicle, as shown in FIG. 2, the rear part of the vehicle body is deformed by the rear-end impact force, and the silencer 1 moves forward with this. At this time, the locking claws 14 of the silencer 1 The engagement with the engagement portion 15 of the suspension cross member 3 prevents the silencer 1 from further moving forward. In other words, the engagement between the locking claw 14 and the engagement portion 15 prevents the silencer 1 from being entrapped below the suspension cross member 3 which may occur in the past.

Accordingly, the silencer 1 effectively exerts the function as a rigid body for suppressing rear-end collision during the vehicle rear-end collision, so that the attack absorption control operation can be surely exhibited. In addition, since a reinforcing member for strengthening rigidity is provided on a vehicle body component (e.g., rear fender) on a side where the silencer 1 is not provided, the vehicle body deformation balance at the time of a rear-end collision is maintained. Has become.

Further, in the case of the present embodiment, the forward movement of the silencer 1 at the time of a rear-end collision can be prevented by the engagement between the locking claw 14 fixed to the front end of the silencer 1 and the engaging portion 15 of the suspension cross member 3. With this configuration, an extremely simple means of fixing the locking claw 14 to the front end of the silencer 1 can secure the rear-end collision suppressing action (that is, the attack absorption control action) of the silencer 1.

In the above description, the suspension cross member is a layout component disposed in front of the silencer. However, the present invention is also applicable to a configuration using another member as a layout component. It is.

The present invention is not limited to the configuration of the above-described embodiment, and it is needless to say that the design can be changed as appropriate without departing from the gist of the invention.

[Brief description of the drawings]

FIG. 1 is a schematic rear plan view of an automobile having a silencer structure according to an embodiment of the present invention.

FIG. 2 is a rear schematic plan view showing a state of a vehicle having a silencer structure according to an embodiment of the present invention in a rear-end collision.

FIG. 3 is a right side front view of the vehicle equipped with the silencer structure according to the embodiment of the present invention, as viewed from the front of the suspension cross member.

FIG. 4 is a perspective view of an essential part showing a silencer structure of an automobile according to an embodiment of the present invention.

[Explanation of symbols]

1 is a silencer, 2 is a suspension device, 3 is a layout component (suspension cross member), 14 is a locking portion (locking claw), and 15 is an engaging portion.

Claims (2)

(57) [Claims] 1. A silencer disposed behind a vehicle body bottom.
A suitable layout component made of a rigid body is disposed at a front portion of the vehicle.
When the layout parts of the silencer
Restricts forward movement of the silencer by preventing undercut
To the engagement part provided at an appropriate position of the layout component.
A silencer structure for an automobile, comprising a locking claw that fits. 2. The method according to claim 1, wherein the layout component is a suspension.
2. The vehicle silencer structure according to claim 1, wherein said structure is a cross member .